JP7341865B2 - swing work machine - Google Patents

Description

The present invention relates to a swing working machine such as a backhoe.

The swing work machine disclosed in Patent Document 1 includes a swing base, a protection mechanism provided on the swing base to protect the driver's seat, a heater device that heats the inside of the protection mechanism, and a work machine provided on the swing base. A device, a battery unit, an electric motor driven by the electric power output by the battery unit, a hydraulic pump that discharges hydraulic oil by driving the electric motor, a hydraulic device driven by the hydraulic oil discharged by the hydraulic pump, and the electric motor. and a cooling fan that sends cooling air from the hydraulic oil pump toward the heater device to warm up the heater device.

Japanese Patent Application Publication No. 2011-89369

However, in the technique of Patent Document 1, in order to make the heating function of the heater device function, it was necessary to separately supply energy such as electric power.
The present invention has been made to solve the problems of the prior art, and aims to provide a swing working machine that can efficiently heat the inside of a protection mechanism using the heat of hydraulic oil. purpose.

A swing work machine according to one aspect of the present invention includes a swing base, a protection mechanism provided on the swing base to protect a driver's seat, a work device provided on the swing base, a battery unit, and an output from the battery unit. A hydraulic circuit that includes an electric motor driven by electric power, a hydraulic pump that discharges hydraulic oil by driving the electric motor, and a hydraulic device that is driven by the hydraulic oil discharged by the hydraulic pump, and the inside of the protection mechanism by the heat of the hydraulic oil. a heating device that performs heating; a heat exchange section that is provided around the first pipe line or the second pipe line and has a plurality of fins through which hydraulic oil flows; and a heat exchange section that supplies air around the fins to the inside of the protection mechanism a second heating device having a blower fan that blows air toward the hydraulic device; a second pipe line through which oil flows; connected, the other end is connected to a second connection part provided downstream in the flow direction of the hydraulic oil than the first connection part in at least one of the first pipe line and the second pipe line, and the middle part is protected. a bypass pipe line arranged inside the mechanism, the operating valve regulates the hydraulic oil flowing from the first connection part to the bypass pipe line, and the hydraulic oil flows from the first connection part to the second connection part without going through the bypass pipe line. a non-heating position that allows hydraulic oil to flow into the connection; and a non-heating position that allows hydraulic oil to flow from the first connection to the bypass line, and hydraulic oil to flow from the first connection to the second connection without going through the bypass line. It is possible to switch between the heating position and the regulating position.

According to the swing working machine described above, the inside of the protection mechanism can be efficiently heated using the heat of the hydraulic oil.

It is a diagram showing a hydraulic system circuit of the swing work machine. FIG. 3 is a right front perspective view showing the swivel base. FIG. 3 is a right rear perspective view showing the swivel base. FIG. 2 is a plan view showing an undercarriage, a swivel base, and various devices arranged on the swivel base. FIG. 2 is a left side view showing a swivel base and various devices arranged on the swivel base. FIG. 3 is a rear view showing the undercarriage, the swivel base, and various devices arranged on the swivel base. It is a left front perspective view showing a swivel base and an exterior cover. It is a right rear perspective view which shows a swivel base and an exterior cover. FIG. 3 is a right front perspective view showing the swivel base and the protection mechanism. FIG. 2 is a right front perspective view showing a rotating board, a battery unit, electrical components, an electric motor, and a hydraulic pump. FIG. 2 is a diagram illustrating a system of a swing work machine. FIG. 3 is a plan view showing a battery unit, electrical components, and a radiator. FIG. 3 is a right rear perspective view showing how the battery unit and electrical components are attached. FIG. 3 is a plan view showing a support stay and a plurality of mounting devices. It is a left rear perspective view showing attachment of an electric motor and a hydraulic pump. It is a left side sectional view showing a battery unit, electrical equipment, and a support stay showing a wiring space. It is a right rear perspective view showing a radiator, an oil cooler, a shroud, a support frame, and a turning board. It is a right rear perspective view showing a radiator, an oil cooler, and a shroud. It is a top view showing the positional relationship of a radiator, an oil cooler, and a shroud. It is a figure showing attachment of a radiator, an oil cooler, and a shroud. It is a figure showing attachment of a radiator and an oil cooler. FIG. 1 is a diagram showing a screen displayed on a display device. FIG. 2 is a second diagram showing a screen displayed on a display device. FIG. 3 is a diagram showing a screen displayed on a display device. FIG. 4 is a diagram showing a screen displayed on a display device. FIG. 5 is a diagram showing a screen displayed on a display device. FIG. 3 is a diagram illustrating a series of steps for setting the output battery of the control device. FIG. 2 is a schematic side view showing the swing working machine. FIG. 2 is a schematic plan view showing a swing work machine. FIG. 2 is a schematic rear view showing the swing working machine.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
First, the overall configuration of the working machine 1 will be explained. As shown in FIG. 23, the work machine 1 is a swing work machine such as a backhoe that includes, for example, a swing base (body) 2, a lower traveling body 10, and a work device 20. Further, the swing work machine 1 is an electric work machine driven by electric power. A driver's seat 8 for a worker to sit on is provided on the swivel base 2, and the periphery of the driver's seat 8 is covered by a protection mechanism 80.

In this embodiment, the front side of the worker seated in the driver's seat 8 of the swing work machine 1 (in the direction of arrow A1 in FIGS. 23 and 24) is the front side, and the rear side of the worker (in the direction of arrow A1 in FIGS. 23 and 24) is A2 direction) to the rear, the left side of the worker (front side in FIG. 23, arrow B1 direction in FIGS. 24 and 25) to the left, and right side of the worker (back side in FIG. 23, arrow B2 in FIGS. 24 and 25) (direction) is explained as being to the right. Further, the horizontal direction, which is a direction orthogonal to the front-rear direction, will be described as the width direction (see FIGS. 24 and 25). The direction from the central part in the width direction of the swivel base 2 toward the right or left part will be described as the outward direction in the width direction. An operable operating device 5 is provided around the driver's seat 8, and the swing work machine 1 is operated by operating the operating device 5.

The swivel base 2 is rotatable around a swivel axis (vertical axis) X extending in the vertical direction. Specifically, the swivel base 2 is supported on the lower traveling body 10 via a swivel bearing 3 so as to be rotatable around the swivel axis X (swivelable to the left and right). The center of the swing bearing 3 is a swing axis X (swing center), and a swing motor (swivel device) MT, which will be described later, is attached to the swing base 2. This swing motor MT is a hydraulic device M that is driven by hydraulic oil discharged by a hydraulic pump P, and is a motor that drives the swing table 2 to rotate around the swing axis X. The swing motor MT is provided below the protection mechanism 80 and below the front of the driver's seat 8, and is attached to a swing board 60, which will be described later. The swivel base 2 is provided with an exterior cover (cover) 70, a bracket, a stay, and the like. The exterior cover 70 forms a space (rear room) R in the rear of the swivel base 2 in which equipment, tanks, other parts, etc. are arranged. Brackets, stays, and the like are members to which the above-mentioned parts and the like are attached.

As shown in FIGS. 23 and 24, the lower traveling body 10 includes a traveling frame 11 and a traveling mechanism 12. The traveling frame (truck frame) 11 is a structure to which the traveling mechanism 12 is attached and supports the swivel base 2 on the upper part.
The traveling mechanism 12 is, for example, a crawler type. As shown in FIG. 25, the traveling mechanism 12 is provided in a traveling portion 11a on one side (left side) of the traveling frame 11 in the width direction, and a traveling portion 11b on the other side (right side) of the traveling frame 11. The traveling mechanism 12 includes an idler 13, a driving wheel 14, a plurality of rolling wheels 15, an endless crawler belt 16, and a traveling system hydraulic equipment M (travel motor ML) driven by hydraulic fluid discharged by a hydraulic pump P. , MR). The idler 13 is arranged at the front of the running frame 11, and the drive wheel 14 is arranged at the rear of the running frame 11. The plurality of rolling wheels 15 are provided between the idler 13 and the drive wheel 14. The crawler belt 16 is wound around the idler 13, the drive wheel 14, and the wheel 15. The travel motors ML and MR17 are comprised of hydraulic motors, and drive the drive wheels 14 to circulate the crawler belt 16 in the circumferential direction. A dozer device 18 is attached to the front part of the lower traveling body 10. The dozer device 18 is pivotally supported at the front of the traveling frame 11 and is swingable by a support arm. The support arm is driven up and down by the expansion and contraction of a dozer cylinder C5, which is a hydraulic cylinder (hydraulic actuator).

As shown in FIGS. 23 and 24, the working device 20 is provided on the front side of the swivel base 2, and is driven by hydraulic oil. Further, the working device 20 is arranged on the other side (right side) with respect to the center line L in the width direction of the swivel base 2. The work device 20 is operated by the operating device 5. As shown in FIG. 23, the working device 20 includes a boom 21, an arm 22, and a bucket (working tool) 23. The base end side of the boom 21 is pivotally attached to a swing bracket 24 so as to be rotatable around a horizontal axis (an axis extending in the width direction of the aircraft), so that the boom 21 can swing in the vertical direction (vertical direction). has been done. The arm 22 is pivotally attached to the distal end side of the boom 21 so as to be rotatable about a horizontal axis, and the arm 22 is swingable in the front-rear direction or the up-down direction. The bucket 23 is provided on the tip side of the arm 22 so as to be capable of scooping and dumping operations. The swing work machine 1 can be equipped with another work tool (hydraulic attachment) that can be driven by hydraulic oil instead of or in addition to the bucket 23. Examples of other working tools include a hydraulic breaker, a hydraulic crusher, an angle broom, an earth auger, a pallet fork, a sweeper, a mower, and a snow blower.

As shown in FIG. 23, the swing work machine 1 is equipped with a working hydraulic equipment M operated by hydraulic fluid discharged by a hydraulic pump P, and the working device 20 is driven by the working hydraulic equipment M. Operate. In this embodiment, the hydraulic equipment M includes a swing cylinder C1, a boom cylinder C2, an arm cylinder C3, and a bucket cylinder C4. The swing cylinder C1, boom cylinder C2, arm cylinder C3, and bucket cylinder C4 are constituted by hydraulic cylinders (hydraulic actuators). As shown in FIG. 23, the swing bracket 24 can swing by expanding and contracting a swing cylinder C1 provided on the right side of the swivel base 2. As shown in FIG. The boom 21 can be rocked by expanding and contracting the boom cylinder C2. The arm 22 can swing by expanding and contracting the arm cylinder C3. The bucket 23 is capable of scooping and dumping operations by expanding and contracting the bucket cylinder C4.

The hydraulic circuit of the swing work machine 1 will be explained below. As shown in FIG. 1, the hydraulic circuit of the swing work machine 1 includes a hydraulic device M, a hydraulic pump P, a hydraulic oil tank T, a control valve V, an oil passage 40, and an oil cooler 30. ing. The hydraulic pump P is mounted on the swivel base 2 and is driven by a drive source that outputs power. The hydraulic pump P includes a first hydraulic pump P1, a second hydraulic pump P2, a third hydraulic pump P3, and a fourth hydraulic pump P4.

The first hydraulic pump P1, the second hydraulic pump P2, and the third hydraulic pump P3 supply hydraulic oil to a working system hydraulic equipment M that drives the working device 20 and a traveling system hydraulic equipment M that drives the lower traveling body 10. It is a pump that discharges Specifically, the first hydraulic pump P1 supplies hydraulic oil that drives the swing cylinder C1, the boom cylinder C2, and the travel motor ML. The second hydraulic pump P2 supplies hydraulic oil that drives the arm cylinder C3, dozer cylinder C5, and travel motor MR. The third hydraulic pump P3 supplies hydraulic oil that drives the bucket cylinder C4 and the swing motor MT. The first hydraulic pump P1, the second hydraulic pump P2, and the third hydraulic pump P3 are variable displacement hydraulic pumps equipped with a pump displacement control mechanism such as a swash plate.

The fourth hydraulic pump P4 is a pump that supplies hydraulic oil for signal use or control use, that is, pilot oil. Note that the hydraulic pump P only needs to be able to discharge hydraulic oil for operating the hydraulic equipment M and pilot oil for controlling the hydraulic equipment M, and its configuration is not limited to the above configuration.
The hydraulic oil tank T is a tank that stores hydraulic oil.

As shown in FIG. 1, the control valve V has control valves V1 to V8, and the control valves V1 to V8 adjust the hydraulic fluid output from the hydraulic pump P to the hydraulic equipment M. The control valves V include a swing control valve V1 that controls the swing cylinder C1, a boom control valve V2 that controls the boom cylinder C2, an arm control valve V3 that controls the arm cylinder C3, and a bucket control valve that controls the bucket cylinder C4. V4, a dozer control valve V5 that controls the dozer cylinder C5, a left travel control valve V6 that controls the travel motor ML of the left travel mechanism 12, and a right travel control valve that controls the travel motor MR of the right travel mechanism 12. It has a valve V7 and a swing control valve V8 that controls the swing motor MT.

The spools of the control valves V1 to V8 are moved by the action of pilot oil in proportion to the amount of operation of the remote control valves (operating valves) PV1 to PV6 by operating the operating lever (operating member) 5a of the operating device 5. . In other words, the operating device 5 can operate the hydraulic equipment M by controlling the control valves V1 to V8 by adjusting the hydraulic oil (pilot oil) acting on the control valves V1 to V8. The control valves V1 to V8 supply hydraulic fluid in an amount proportional to the amount by which the spool is moved to the hydraulic equipment M to be controlled (swing cylinder C1, boom cylinder C2, arm cylinder C3, bucket cylinder C4, dozer cylinder C5, traveling cylinder). motors ML, MR, and swing motor MT).

The oil cooler 30 is a device that cools the hydraulic oil flowing through the oil passage 40. The oil cooler 30 is cooled by an oil cooler fan 30a that is rotationally driven. The oil cooler fan 30a sucks air around the oil cooler 30 and discharges the sucked air from inside the rear room R formed by the exterior cover 70 to the outside.
As shown in FIG. 1, the oil passage 40 connects the hydraulic equipment M, the hydraulic pump P, the control valves V1 to V8 (control valves V), and the like, and allows hydraulic oil and pilot oil to flow therethrough. The oil passage 40 includes a first pipe line 41, a second pipe line 42, a third pipe line 44, and a second discharge oil line 45.

As shown in FIG. 1, the first pipe line (first discharge oil line) 41 carries hydraulic oil discharged by the hydraulic pumps P (first hydraulic pump P1, second hydraulic pump P2, and third hydraulic pump P3). Flow toward hydraulic equipment M. Specifically, the first pipe line 41 includes a first supply oil passage 41a connected to the first hydraulic pump P1, and a plurality of second supply oil passages 41b branched from the first oil supply passage 41a. Contains. The plurality of second supply oil passages 41b are connected to control valves V1 to V8, respectively. That is, the hydraulic oil flowing through the first pipe line 41 is supplied to the hydraulic equipment M through the first oil supply line 41a, the second oil supply line 41b, and the control valves V1 to V8. In addition, in this embodiment, the first pipe line 41 includes a first supply oil line 41a and a plurality of second supply oil lines 41b, but the first pipe line 41 includes at least a hydraulic pump P. Any oil path may be used as long as the discharged hydraulic oil flows toward the hydraulic equipment M, and the oil passage may include an oil path that connects the control valves V1 to V8 and the hydraulic equipment M, and is not limited to the above configuration.

As shown in FIG. 1, the second pipe line 42 allows hydraulic oil discharged from the hydraulic equipment M to flow therethrough. Specifically, the second pipe line 42 is connected to the control valves V1 to V8 at one end, merges in the middle, and is connected to the oil cooler 30 at the other end. Therefore, the hydraulic oil discharged from the hydraulic equipment M passes through the control valves V1 to V8, returns to the second pipe 42, and flows to the oil cooler 30. In the present embodiment, the second pipe line 42 is connected to the control valves V1 to V8, but it may be any oil line through which hydraulic oil discharged from the hydraulic equipment M flows, and the second pipe line 42 is connected to the control valves V1 to V8. It may include an oil passage connecting the hydraulic equipment M and the hydraulic equipment M, and through which hydraulic oil discharged from the hydraulic equipment M flows, and is not limited to the above configuration.

As shown in FIG. 1, the third pipe line 44 connects the oil cooler 30 and the hydraulic pumps P (first hydraulic pump P1, second hydraulic pump P2, and third hydraulic pump P3), and Hydraulic oil is supplied to the first hydraulic pump P1, the second hydraulic pump P2, and the third hydraulic pump P3. Specifically, the third pipe line 44 includes a discharge oil passage 44a that allows the hydraulic oil cooled by the oil cooler 30 to flow to the hydraulic oil tank T, and a discharge oil passage 44a that allows the hydraulic oil cooled by the oil cooler 30 to flow to the hydraulic oil tank T, and a discharge oil path 44a that allows the hydraulic oil that has been cooled by the oil cooler 30 to flow to the hydraulic oil tank T, and a discharge oil path 44a that allows the hydraulic oil that has been cooled by the oil cooler 30 to flow to the hydraulic oil tank T, and a discharge oil passage 44a that allows the hydraulic oil that has been cooled by the oil cooler 30 to flow to the hydraulic oil tank T, and a discharge oil path 44a that allows the hydraulic oil that has been cooled by the oil cooler 30 to flow to the hydraulic oil tank T. It includes a hydraulic pump P2 and a suction oil passage 44b that is sucked by the third hydraulic pump P3. Therefore, the hydraulic oil cooled by the oil cooler 30 is returned to the hydraulic oil tank T through the discharge oil passage 44a, and the hydraulic oil stored in the hydraulic oil tank T is returned to the hydraulic oil tank T through the suction oil passage 44b. It is supplied to the first hydraulic pump P1, the second hydraulic pump P2, and the third hydraulic pump P3.

As shown in FIG. 1, the second discharge oil passage 45 connects the hydraulic pump P (fourth hydraulic pump P4) and the remote control valves PV1 to PV6, and supplies the hydraulic oil discharged by the fourth hydraulic pump P4 to the remote control valve. Flow to PV1 to PV6. The second discharge oil passage 45 branches into a plurality of parts in the middle, and each is connected to a primary side port (primary port) of the remote control valves PV1 to PV6.
As shown in FIG. 1, the swing work machine 1 includes a drive restriction device 47 that prohibits or limits the drive of the work device 20. The drive restriction device 47 prohibits or limits the drive of the hydraulic equipment M by cutting off the supply of hydraulic oil from the hydraulic pump P to the hydraulic equipment M. For example, the drive limiting device 47 has an allowable state in which the supply of hydraulic oil to the remote control valves PV1 to PV6 is allowed to operate the control valves V1 to V8, that is, the operation of the hydraulic equipment M; It is possible to switch between a state in which the operation of the control valves V1 to V8, that is, the operation of the hydraulic equipment M, is prohibited or restricted by stopping the supply of hydraulic oil to the hydraulic equipment M. Thereby, the drive limiting device 47 prohibits or limits the drive of the hydraulic equipment M, that is, the drive of the working device 20 is prohibited or limited.

In this embodiment, the drive limiting device 47 includes an unload valve 48 provided in the second discharge oil passage 45 and an unload lever (unload operating tool) 5b that operates the unload valve 48. . The unload valve 48 is a two-position switching valve that can be switched between a supply position 48a and a cutoff position 48b. When in the supply position 48a, the unload valve 48 supplies the hydraulic oil flowing through the second discharge oil path 45 to the remote control valves PV1 to PV6. When the unload valve 48 is in the cutoff position 48b, the supply of hydraulic oil to the remote control valves PV1 to PV6 is cut off, that is, the supply of hydraulic oil in the second discharge oil path 45 to the remote control valves PV1 to PV6 is stopped. do.

The unload valve 48 is biased by a spring in a direction in which it is switched to a cutoff position (unload position) 48b, and when the solenoid is demagnetized, the cutoff position 48b is set, and when the solenoid is energized, it is set to the supply position 48a. Can be switched. Specifically, the unload valve 48 is energized when the unload operating tool 5b is lowered, and demagnetized when the unload operating tool 5b is pulled up.

Therefore, when the unload operation tool 5b is lowered, the unload valve 48 is switched to the supply position 48a, and the hydraulic oil (discharge oil) discharged from the fourth hydraulic pump P4 is transferred to the remote control valves PV1 to PV1 through the unload valve 48. Supplied to the primary side port of PV6.
When the unload operating tool 5b is pulled up, the unload valve 48 is switched to the cutoff position 48b, and hydraulic oil (pilot oil) is no longer supplied to the remote control valves PV1 to PV6, making it impossible to operate the hydraulic equipment M.

In this embodiment, the drive limiting device 47 is an unload valve 48 that prohibits or limits the drive of the hydraulic equipment M by cutting off the supply of hydraulic oil from the hydraulic pump P to the hydraulic equipment M. The hydraulic equipment M is driven by attaching an operable locking piece (not shown) to the operating device 5 (operating lever 5a) for operating the equipment M (work device 20) and restraining the operation of the operating lever 5a. It may be configured to prohibit or restrict. In such a case, the drive limiting device 47 is a lever lock that restricts the operation of the operating lever 5a.

The swivel base 2 will be explained below. As shown in FIGS. 2 and 3, the swivel base 2 includes a swivel board (substrate) 60, a plurality of vertical ribs (a first vertical rib 61 and a second vertical rib 62), a support bracket 63, and a partition plate 64. and a support frame 65. The rotating board 60 is formed from a thick steel plate or the like, and is arranged so that the plate surface faces in the vertical direction. The swing base plate 60 is rotatably supported on the lower traveling body 10 via the swing bearing 3 about the swing axis X.

As shown in FIGS. 2 and 3, the first vertical rib 61 and the second vertical rib 62 are members that reinforce the rotating board 60, and are provided extending from the front to the rear of the rotating board 60. There is. The first vertical rib 61 and the second vertical rib 62 are erected on the rotating base plate 60 and are arranged in parallel and separated from each other in the width direction. The first vertical rib 61 is arranged on the left side of the rotating base plate 60, and the second vertical rib 62 is arranged on the right side of the rotating base plate 60.

As shown in FIGS. 2 and 3, the support bracket 63 is provided in front of the first vertical rib 61 and the second vertical rib 62. As shown in FIGS. As shown in FIG. 4 , the support bracket 63 and the front portions of the first vertical rib 61 and the second vertical rib 62 are provided at a position offset to the right from the center in the width direction of the rotating base plate 60 . As shown in FIG. 23, the swing bracket 24 is attached to the support bracket 63 so as to be swingable around a vertical axis (an axis extending in the vertical direction). A base end side of the working device 20 (boom 21) is attached to the swing bracket 24 so as to be rotatable around a horizontal axis.

As shown in FIG. 2, the partition plate 64 is a member that partitions the front lower part of the rear room R. The partition plate 64 has a plate surface facing in the front-rear direction, and is disposed at the rear of the rotating board 60 from one side (left side) to the other side (right side) in the width direction.
As shown in FIGS. 2, 3, and 4, the support frame 65 is erected at the rear of the rotating board 60 and behind the partition plate 64. The rear part of the support frame 65 is located further back than the rear part of the lower traveling body 10. Specifically, the support frame 65 is disposed within the rear room R and supports the exterior cover 70 and peripheral components disposed inside the exterior cover 70. The support frame 65 is fixed to a plurality of leg members (a first leg 65a, a second leg 65b, a third leg 65c, and a fourth leg 65d) erected on the rotating board 60, and the upper part of these leg members. and a rod member 65e.

As shown in FIGS. 2 and 3, the first leg 65a includes a first support portion 65a1 and a first extension portion 65a2. The first support column 65a1 is erected on the left side of the front part of the rear room R, and extends in the vertical direction. Specifically, the lower end of the first support column 65a1 is attached to the left side of the rear surface of the partition plate 64. The first extending portion 65a2 extends rearward and upward from the upper end of the first support portion 65a1, is bent at a midway portion, and extends rearward.

As shown in FIGS. 2 and 3, the second leg 65b includes a second support portion 65b1 and a second extension portion 65b2. The second support column 65b1 is erected on the front right side of the rear room R and extends in the vertical direction. Specifically, the lower end of the second support portion 65b1 is attached to the right side of the partition plate 64. In other words, the lower end of the second support column 65b1 is located further forward than the first support column 65a1. The second extending portion 65b2 extends rearward and upward from the upper end of the second support portion 65b1, is bent at a midway portion, and extends rearward.

As shown in FIGS. 2 and 3, the third leg 65c includes a third support portion 65c1 and a third extension portion 65c2. The third support column 65c1 is erected on the rear left side of the rear room R, and extends in the vertical direction. The rear part of the third support column 65c1 is located further back than the rear part of the lower traveling body 10. The third extending portion 65c2 extends forward and upward from the upper end of the third support column 65c1, is bent in the middle, and extends forward.

As shown in FIGS. 2 and 3, the fourth leg 65d includes a fourth support portion 65d1 and a fourth extension portion 65d2. The fourth support portion 65d1 is erected at the rear of the rear room R and extends in the vertical direction. The rear part of the fourth support column 65d1 is located further back than the rear part of the lower traveling body 10. The fourth extending portion 65d2 extends forward and upward from the upper end of the fourth support portion 65d1, is bent in the middle, and extends forward.

As shown in FIGS. 2 and 3, the rod member 65e is arranged so that its plate surface faces in the up-down direction and extends in the width direction. The rod member 65e is placed over the upper end of the first extending part 65a2, the upper end of the second extending part 65b2, the third extending part 65c2, and the upper end of the fourth extending part 65d2, and It is fixed at the exit. Specifically, as shown in FIG. 6, the rod member 65e extends leftward from the upper end of the first extending portion 65a2, bends downward at the left end, and reaches the upper end of the second extending portion 65b2. There is.

As shown in FIGS. 7 and 8, the exterior cover 70 has a bonnet 71. As shown in FIGS. The hood 71 includes a bonnet center 72 , a rear bonnet 73 , a first side bonnet 74 , and a second side bonnet 75 . The bonnet center 72 is a cover member that forms the upper and front sides of the rear room R, and blocks the inside (indoor) side of the protection mechanism 80 from the rear room R side. The bonnet center 72 is attached to the upper part of the rod member 65e, and the lower part of the bonnet center 72 is attached to the upper part of the partition plate 64. The rear bonnet 73 is a cover member that forms the rear of the rear room R, and is attached to the support frame 65. The first side bonnet 74 is a cover member that forms the left side of the rear room R. The second side bonnet 75 is a cover member that forms the right side of the rear room R. The second side bonnet 75 has an opening that communicates the inside of the rear room R (bonnet 71) with the outside.

The protection mechanism 80 provided on the swivel base 2 and covering the driver's seat 8 will be described below. As shown in FIGS. 23 and 24, the protection mechanism 80 is mounted near the front of the swivel base 2 and protects the driver's seat 8. The protection mechanism 80 is arranged on one side (left side) with respect to the center line L of the swivel base 2 in the width direction. As shown in FIG. 9, the protection mechanism 80 includes a support 81 and a roof 84 supported by the support 81. In this embodiment, the strut 81 includes a first strut 82 disposed on one side (left side) in the width direction of the swivel base 2 and a second strut 83 disposed on the other side (right side) in the width direction. The protection mechanism 80 is a cabin. Note that the structure of the protection mechanism 80 is not limited to the above structure, and may be a cabin with a two-post structure or a three-post structure, or may be a canopy.

As shown in FIG. 9, the first strut 82 includes a first front strut 82a disposed at the front of one side (left side) in the width direction of the swivel base 2, and a first front strut 82a disposed at the rear of the left side of the swivel base 2. It includes a first rear strut 82b and a first upper connecting portion 82c that connects the upper end of the first front strut 82a and the upper end of the first rear strut 82b. The first front strut 82a and the first rear strut 82b are provided on the left side of the swivel base 2 at intervals in the front-rear direction, and extend in the up-down direction. The first upper connecting portion 82c curves rearward from the upper end of the first front strut 82a, curves downward in the middle, and reaches the upper end of the first rear strut 82b.

As shown in FIG. 9, the second support column 83 includes a second front support column 83a arranged at the front part of the other widthwise side (right side) of the swivel table 2, and a second front column 83a arranged at the rear part of the right side of the swivel table 2. It includes a second rear strut 83b and a second upper connecting portion 83c that connects the upper end of the second front strut 83a and the upper end of the second rear strut 83b. The second front strut 83a and the second front strut 83a are provided on the right side of the swivel base 2 at intervals in the front-rear direction, and each extends in the up-down direction. The second upper connecting portion 83c curves rearward from the upper end of the second front strut 83a, curves downward in the middle, and reaches the upper end of the second rear strut 83b.

As shown in FIG. 9, the roof 84 is a substantially plate-shaped structure in a plan view arranged above the driver's seat 8, and is supported on the upper part of the support column 81 so that the plate surface faces in the vertical direction. There is. The roof 84 is provided between the first upper connecting portion 82c and the second upper connecting portion 83c, extends from the front to the rear of the swivel base 2, and extends from one side of the swivel base 2 in the width direction. (left side) to the other side (right side).

As shown in FIG. 9, a lower front frame 85 is provided at the lower end of the front portion of the protection mechanism 80. As shown in FIG. The lower front frame 85 is provided between the lower end of the first front support 82a and the lower end of the second front support 83a. The lower front frame 85 extends in the width direction and is attached to the upper front side of the swivel base 2 via a plurality of support mounts (not shown).
As shown in FIG. 9, a rear lower frame 86 is provided at the lower end of the rear part of the protection mechanism 80. The rear lower frame 86 is provided between the lower end of the first rear support 82b and the lower end of the second rear support 83b. The rear lower frame 86 is provided at a higher position than the front lower frame 85. The rear lower frame 86 extends in the width direction, is attached to the upper part of the bonnet center 72 via a plurality of support mounts (not shown), and is disposed above the rod member 65e.

The equipment mounted in the rear room R of the swivel base 2 will be described below. As shown in FIG. 11, the swing work machine 1 includes a battery unit 90, an electric motor 91, electrical components 92, a charging port 93, and a radiator 94, and includes FIGS. 4, 5, and 6. As shown in FIG. 2 , a battery unit 90 , an electric motor 91 , an electrical component 92 , a charging port 93 , and a radiator 94 are provided on the swivel base 2 . The battery unit 90 is a structure that can store electricity and outputs the stored electricity.

The electric motor 91 is a drive source driven by electric power output from the battery unit 90. The electric motor 91 is a three-phase AC synchronous motor with an embedded permanent magnet. The electric motor 91 has a rotatable rotor (rotor) and a stator (stator) that generates force for rotating the rotor. The rotation speed of the electric motor 91 is controlled, for example, by a rotation speed operating tool 5c. The rotation speed operating tool 5c can set the range of the motor rotation speed of the electric motor 91 when the motor rotation speed of the electric motor 91 is set according to the current value that changes according to the operation of the operating device 5. The rotational speed operating tool 5c is, for example, a dial-shaped switch such as a selector switch having a plurality of switching positions, and a target value of the rotational speed of the electric motor 91 is assigned to the plurality of switching positions. The rotation speed operating tool 5c is operable to set the target value of the rotation speed of the electric motor 91 within a range of 1500 to 2600 rpm/min. Note that the electric motor 91 may be another type of synchronous motor, an AC motor, or a DC motor. Further, the rotation speed of the electric motor 91 is not limited to the rotation speed operating tool 5c, and may be operated by other members included in the operating device 5. For example, the rotation speed of the electric motor 91 may be controlled based on a preset table according to the amount of operation of the operating device 5.

The electric motor 91 rotates a drive shaft using electric power supplied from the battery unit 90, and transmits driving force to the hydraulic pump P from the drive shaft. The hydraulic pump P is connected to the drive shaft of the electric motor 91, and is driven by the driving force transmitted from the drive shaft. That is, the hydraulic pump P is driven by the electric motor 91 and discharges hydraulic oil.
The electrical equipment 92 is a device or the like that is directly or indirectly connected to the battery unit 90 and that transmits power supplied by the battery unit 90 or operates using the power. The electrical components 92 are, for example, a junction box 92a, an inverter 92b, and a DC/DC converter 92c. Junction box 92a is connected to other devices including battery unit 90 and inverter 92b, and transmits power supplied from battery unit 90 to other devices.

The inverter 92b is provided in the power supply path 132 from the battery unit 90 to the electric motor 91, and adjusts the electric power output to the electric motor 91. In this embodiment, the inverter 92b is connected to the junction box 92a and the electric motor 91. The inverter 92b is a device that drives the electric motor 91, converts DC power into three-phase AC power, and supplies the three-phase AC power to the electric motor 91. The inverter 92b can arbitrarily change the current and voltage of the power supplied to the electric motor 91.

The DC/DC converter 92c converts the input DC current voltage into a different voltage. In this embodiment, the DC/DC converter 92c is a step-down converter that converts an input voltage to a lower voltage. The DC/DC converter 92c is provided, for example, in the swing work machine 1, and supplies power to an on-vehicle battery 96 that supplies power to electronic equipment.
The charging port 93 is a socket to which a cable that is supplied with power from the outside and stores power in the battery unit 90 is connected. As shown in FIG. 6, the charging port 93 is attached to the rear part of the support frame 65. The support frame 65 is attached to a support stay 66 that is attached to the middle part of the third support part 65c1 in the vertical direction and the middle part of the fourth support part 65d1 in the vertical direction. The support stay 66 is arranged to extend in the width direction, and supports the charging port 93 at the center portion in the width direction. As shown in FIG. 8, the charging port 93 is exposed from the exterior cover 70 by opening a charging lid (lid member) 73a attached to the rear bonnet 73 when connecting to a cable that supplies power from the outside. The charging lid 73a is swingably connected to the rear bonnet 73 and the support frame 65 by a hinge or the like, and can be opened and closed around the swing axis of the hinge. Note that the rear bonnet 73 can be opened and closed at least at a portion corresponding to the charging port 93, and the method of opening and closing is not limited to the above-described charging lid 73a, but may also be a lid member that can be opened and closed by sliding, for example. good.

The radiator 94 is a device that cools cooling water (refrigerant) that cools the electric motor 91, the battery unit 90, the electrical components 92, and the like. The radiator 94 is cooled (heat removed) by a radiator fan 94a. The radiator fan 94a generates cooling air by rotating and removes heat from the radiator 94. The radiator fan 94a sucks air around the radiator 94 and discharges it from the inside of the rear room R to the outside of the rear room R through the opening of the exterior cover 70. Thereby, the cooling air whose temperature has increased by exchanging heat with the radiator 94 is discharged to the outside.

As shown in FIG. 12, the swing work machine 1 has a radiator 94, an electric motor 91, a battery unit 90, electrical components 92 (for example, an inverter 92b and a DC/DC converter 92c), etc. connected thereto, and is cooled by the radiator 94. A water cooling path 95 is provided through which the refrigerant and the refrigerant that has undergone heat exchange with the electric motor 91, battery unit 90, and electrical components 92 flow. The water cooling path 95 is provided with a cooling pump 95a that discharges cooling water and circulates the cooling water as a refrigerant. In this embodiment, the water cooling path 95 circulates cooling water from the radiator 94 to the radiator 94 through the inverter 92b, the DC/DC converter 92c, and the electric motor 91. Specifically, the water cooling path 95 includes a feed waterway 95b, a return waterway 95c, a first waterway 95d, and a second waterway 95e.

As shown in FIG. 12, the feed waterway 95b is a waterway that sends refrigerant from the electrical components 92, the electric motor 91, etc. to the radiator 94. Specifically, the feed waterway 95b connects the electric motor 91 and the radiator 94, Refrigerant flows from the electric motor 91 toward the radiator 94. The return waterway 95c is a waterway that returns the refrigerant from the radiator 94 to the electrical components 92, the electric motor 91, etc., and specifically connects the radiator 94 and the inverter 92b, and allows the refrigerant to flow from the radiator 94 to the inverter 92b.

The first water channel 95d connects the inverter 92b and the DC/DC converter 92c, and allows the refrigerant to flow from the inverter 92b to the DC/DC converter 92c. The second water channel 95e connects the DC/DC converter 92c and the electric motor 91, and allows refrigerant to flow from the DC/DC converter 92c to the electric motor 91. That is, the cooling water cooled by the radiator 94 passes through the return waterway 95c, the inverter 92b, the first waterway 95d, the DC/DC converter 92c, the second waterway 95e, the electric motor 91, and the feed waterway 95b from the radiator 94. Return to radiator 94.

As shown in FIGS. 4 and 5, in addition to the battery unit 90, electric motor 91, hydraulic pump P, and electrical components 92, the rear room R includes an oil cooler 30, a hydraulic oil tank T, and a control valve V ( Control valves V1 to V8) are provided. The arrangement of the battery unit 90, electric motor 91, hydraulic pump P, electrical components 92, hydraulic oil tank T, and control valve V will be described below. The battery unit 90 is disposed at the rear of the swivel base 2, and more specifically, the battery unit 90 is disposed from the middle part of the swivel base 2 in the longitudinal direction to the rear of the swivel base 2. That is, the rear part of the battery unit 90 is located further back than the rear part of the lower traveling body 10. Further, as shown in FIG. 24, the center of gravity of the battery unit 90 is arranged on one side (left side) with respect to the center line L in the width direction of the swivel base 2, and is arranged behind the protection mechanism 80. .

A connector 90b through which the battery unit 90 outputs power is located at the front of the battery unit 90. Connector 90b protrudes forward at the front of battery unit 90.
As shown in FIG. 4, the second support portion 65b1 of the second leg 65b is located in front of the battery unit 90, and the third support portion 65c1 of the third leg 65c is located behind the battery unit 90. The fourth support portion 65d1 of the fourth leg 65d is located. A second extending portion 65b2, a third extending portion 65c2, a fourth extending portion 65d2, and a rod member 65e are located above the battery unit 90. Furthermore, the first leg 65a is located on the left side of the battery unit 90, and the outer periphery of the battery unit 90 is surrounded by the support frame 65.

As shown in FIG. 24, the electric motor 91 and the hydraulic pump P are mounted on the other side with respect to the center line L in the width direction of the swivel base 2, and on the side of the battery unit 90 as shown in FIGS. are arranged in parallel in the direction. Specifically, the electric motor 91 and the hydraulic pump P are arranged below the side (right side) of the battery unit 90. The electric motor 91 is located behind the hydraulic pump P, and is arranged so that its drive shaft faces in the front-rear direction. Hydraulic pump P is located in front of electric motor 91. The rear end of the electric motor 91 substantially matches the rear end of the battery unit 90 , and the front end of the hydraulic pump P substantially matches the front end of the battery unit 90 .

As shown in FIGS. 4 and 10, the electrical components 92 are arranged in a row in the width direction above the battery unit 90. In other words, the battery unit 90 is arranged below the electrical component 92, and the swivel base 2, the battery unit 90, and the electrical component 92 are arranged from the bottom to the top. The electrical components 92 are arranged in this order. That is, the battery unit 90, which is relatively heavy, is disposed below the electrical components 92, and its position in the swing work machine 1 is low.

As shown in FIG. 5, a radiator (cooling mechanism) 94 and an oil cooler (cooling mechanism) 30 are arranged above the hydraulic pump P and the electric motor 91. Thereby, the radiator fan 94a and the oil cooler fan 30a suck in the air around the battery unit 90, including the air that has radiated heat from the battery unit 90, and the air that has been radiated upward by the heat radiated from the hydraulic pump P and the electric motor 91. , ejected to the outside of the aircraft.

As shown in FIGS. 4, 5, and 24, the battery unit 90, the electric motor 91, the hydraulic pump P, the radiator 94, and the oil cooler 30 are arranged behind the rotation axis X.
As shown in FIGS. 4 and 24, the hydraulic oil tank T and the control valve V are arranged in front of the battery unit 90. The hydraulic oil tank T is arranged on the other side (right side) front side of the swivel base 2 with respect to the center line L in the width direction, and is arranged on the right side of the second vertical rib 62. Further, the hydraulic oil tank T is arranged in front of the electric motor 91 and the hydraulic pump P. The hydraulic oil tank T and the hydraulic pump P are arranged side by side in the front-rear direction on the right side of the swivel base 2.

As shown in FIGS. 4 and 24, the control valve V is disposed on the front side of the swivel base 2 on one side (left side) with respect to the center line L in the width direction, and on the left side of the first vertical rib 61. It is located. Further, the control valve V is arranged below the protection mechanism 80. Note that the hydraulic oil tank T and the control valve V are arranged forward of the pivot axis X.
The attachment of the battery unit 90, electric motor 91, hydraulic pump P, and electrical components 92 will be described in detail below. As shown in FIG. 10, the swing work machine 1 includes a support substrate 100, a connecting portion 102, and an upright frame 103. The support substrate 100 is a structure that supports the battery unit 90, the electric motor 91, and the hydraulic pump P at the rear of the swivel base 2.

As shown in FIGS. 13 and 14, the support substrate 100 is made of a thick steel plate or the like, and is placed on the swivel base 2 so that the plate surface faces in the vertical direction. The support substrate 100 includes a first mounting section 100a and a second mounting section 100b. The first mounting portion 100a is a substantially rectangular or substantially rectangular portion in plan view, and the battery unit 90 is mounted thereon. The first mounting portion 100a is a portion on one side (left side) in the width direction of the support substrate 100, and a mounting bracket 100a1 for mounting and fixing the battery unit 90 is attached thereto.

As shown in FIG. 14, the mounting bracket 100a1 extends from one end (left side) to the other end (right side) in the width direction of the battery unit 90, and is attached at the front and rear sides of the first mounting section 100a. , each extending upward. The mounting bracket 100a1 is attached and fixed to the lower rear part of the battery unit 90 using a fastening member such as a bolt. Furthermore, a plurality of first communication holes 100a2 are formed in the center of the first mounting portion 100a. The plurality of first communication holes 100a2 are holes penetrating in the vertical direction, and are located at equal intervals at positions corresponding to the battery unit 90, so that heat released from the battery unit 90 can be released. Note that the number, shape, and position of the plurality of first communication holes 100a2 are not limited to the above configuration.

As shown in FIG. 15, the second mounting portion 100b is a portion to which an electric motor 91 and a hydraulic pump P are attached. The second mounting section 100b is a portion extending laterally from the first mounting section 100a. Specifically, the second placing part 100b is a middle part in the front-rear direction of the first placing part 100a, and extends rightward from the other side (right side) in the width direction.
As shown in FIG. 14, the support substrate 100 is attached to the swivel base 2 via a plurality of mounting devices 101. The plurality of mount devices 101 are vibration isolation mechanisms made of elastic members that can be elastically deformed. The plurality of mounting devices 101 include a front mounting device 101a, a rear mounting device 101b, and an intermediate mounting device 101c. A pair of front mount devices 101a are arranged in the width direction on the front side of the support substrate 100. The left front mount device 101a supports the left front end of the support substrate 100 with respect to the swivel base 2. On the other hand, the right front mount device 101a supports the right front end of the support substrate 100 with respect to the swivel base 2.

As shown in FIG. 14, a pair of rear mounting devices 101b are arranged in the width direction on the rear side of the support substrate 100. The left rear mount device 101b supports the left rear end of the support substrate 100 with respect to the swivel base 2. On the other hand, the right rear mount device 101b supports the right rear end of the support substrate 100 with respect to the swivel base 2.
As shown in FIG. 14, the intermediate mount device 101c is disposed between the rear mount devices 101b, and supports the center portion of the rear end of the support substrate 100 with respect to the swivel base 2. The intermediate mount device 101c is located more rearward than the rear mount device 101b. In other words, the intermediate mount device 101c is positioned offset to the rear with respect to the rear mount device 101b.

As shown in FIGS. 5, 10, and 15, the connecting portion 102 is a coupling that connects the electric motor 91 and the hydraulic pump P. The connecting portion 102 connects the electric motor 91 and the hydraulic pump P so that the drive shaft of the electric motor 91 is connected to the hydraulic pump P. As shown in FIG. 15, the connecting portion 102 includes a cylindrical portion 102a and a mounting portion 102b. The cylindrical portion 102a extends in the front-rear direction, and the drive shaft of the electric motor 91 and the input shaft of the hydraulic pump P are connected inside the cylindrical portion 102a. The attachment portion 102b is a portion placed on the second placement portion 100b, and is, for example, a substantially L-shaped portion when viewed from the side. The attachment part 102b is attached and fixed to the second mounting part 100b with a fastening member such as a bolt. A cylindrical portion 102a is provided on the front side of the mounting portion 102b, and an electric motor 91 is attached and fixed to the opposite side (rear side) of the cylindrical portion 102a with a fastening member such as a bolt.

As shown in FIGS. 10 and 13, the upright frame 103 is a structure that supports one side (left side) and the other side (right side) of the battery unit 90 and supports the electrical components 92 above the battery unit 90. be. The erected frame 103 has a first erected portion 103L, a second erected portion 103R, and a connecting stay 103U. The first erected portion 103L is erected on the upper part of the swivel base 2 and supports one side of the battery unit 90. Specifically, the first standing portion 103L is fixed to the upper part of the support substrate 100. The first standing portion 103L is fixed to the left side of the first mounting portion 100a of the support substrate 100. As shown in FIG. 12, the front end of the first upright portion 103L is approximately flush with the front surface of the battery unit 90, and the rear end of the first upright portion 103L is approximately flush with the rear surface of the battery unit 90. be. Therefore, the first upright portion 103L supports the battery unit 90 in the front-rear direction on one side (left side) in the width direction of the battery unit 90.

On the other hand, as shown in FIGS. 10 and 13, the second upright portion 103R is erected above the swivel base 2 and supports the other side (right side) of the battery unit 90. Specifically, the second standing portion 103R is fixed to the upper part of the support substrate 100. The second upright portion 103R is fixed to the right side of the first mounting portion 100a of the support substrate 100. As shown in FIG. 12, the front end of the second upright portion 103R is approximately flush with the front surface of the battery unit 90, and the rear end of the second upright portion 103R is approximately flush with the rear surface of the battery unit 90. be. Therefore, the second upright portion 103R supports the battery unit 90 in the front-rear direction on the other side (right side) of the battery unit 90 in the width direction. That is, the battery unit 90 is held between the first upright portion 103L and the second upright portion 103R in the width direction.

As shown in FIG. 13, the first erected portion 103L and the second erected portion 103R each include a swing preventing portion 104 and an extending portion 105. The anti-sway portion 104 is attached to the battery unit 90 in the front-rear direction. The anti-sway parts 104 are provided on the left and right sides of the first mounting part 100a, respectively. The anti-sway portion 104 of the second upright portion 103R is erected between the connecting portion 102 and the battery unit 90, and is attached to the other side (right side) of the battery unit 90. Further, the anti-sway part 104 of the first standing part 103L is provided upright above the first mounting part 100a (swivel base 2) on one side (left side) of the battery unit 90, and the second standing part 103R It is attached to one side of the battery unit 90 separately from the anti-sway part 104 .

In this embodiment, the anti-sway section 104 is configured by connecting a plurality of rod-shaped members. For example, as shown in FIG. 13, the anti-sway section 104 includes a plurality of first horizontal bars 104a and a plurality of first vertical bars 104b. The plurality of first horizontal bars 104a are arranged to extend in the front-rear direction, and are arranged separately at the upper and lower parts of the anti-sway section 104, respectively. The plurality of first horizontal bars 104a and the battery unit 90 are attached and fixed by fastening members such as bolts.

As shown in FIG. 13, the plurality of first vertical bars 104b extend in the vertical direction, are arranged apart from each other in the front-back direction, and connect the first horizontal bars 104a on the upper side and the first horizontal bars 104a on the lower side. It is a member. Specifically, the plurality of first vertical bars 104b are arranged separately at the front, middle, and rear portions of the anti-sway portion 104, respectively. The first vertical bar 104b on the front side connects the front ends of the first horizontal bars 104a, the first vertical bar 104b in the middle connects the middle parts of the first horizontal bars 104a, and the first vertical bar 104b on the rear side connects the front ends of the first horizontal bars 104a. The crosspiece 104b connects the rear ends of the first horizontal crosspiece 104a. The plurality of first vertical bars 104b and the battery unit 90 are attached and fixed by fastening members such as bolts.

As shown in FIG. 13, the extending portion 105 is a portion extending upward from the anti-sway portion 104. As shown in FIG. As shown in FIGS. 12 and 13, the extension portion 105 has a shorter length in the front-rear direction than the anti-sway portion 104. As shown in FIGS. The extending portion 105 includes a plurality of second vertical bars 105a and a second horizontal bar 105b. The plurality of second vertical bars 105a extend in the up-down direction and are arranged apart from each other in the front-back direction. Among the plurality of second vertical bars 105a, the second vertical bar 105a on the front side is located behind the first vertical bar 104b on the front side of the anti-sway part 104, and the second vertical bar 105a on the rear side is It is located forward of the first vertical bar 104b on the rear side of the anti-sway portion 104. Among the plurality of second vertical bars 105a, the second vertical bar 105a in the middle is located between the second vertical bar 105a on the front side and the second vertical bar 105a on the rear side.

As shown in FIG. 13, the second horizontal bar 105b is arranged to extend in the front-rear direction, and connects the upper portions of the plurality of second vertical bars 105a. The second horizontal bar 105b is arranged from the second vertical bar 105a on the front side to the second vertical bar 105a on the rear side.
As shown in FIGS. 12 and 13, the connecting stay 103U is a stay that connects the upper part of the first erected part 103L and the upper part of the second erected part 103R, and supports the electrical component 92. In other words, the connecting stay 103U serves both to reinforce the first upright portion 103L and the second upright portion 103R, and to support the electrical component 92. Specifically, the connecting stay 103U is made of, for example, a thick steel plate, and is arranged so that the plate surface faces in the up-down direction. The length of the connecting stay 103U in the width direction is longer than the length in the front-rear direction, and the length in the front-rear direction is shorter than the length of the battery unit 90 in the front-rear direction. One end (left end) in the width direction of the connecting stay 103U is attached to the upper part of the first upright portion 103L, that is, the second horizontal bar 105b. The left end portion of the connecting stay 103U is attached and fixed to the second horizontal bar 105b with a fastening member such as a bolt. On the other hand, the other end (right end) in the width direction of the connecting stay 103U is attached to the upper part of the second upright portion 103R, that is, the second horizontal bar 105b. The right end portion of the connecting stay 103U is attached and fixed to the second horizontal bar 105b with a fastening member such as a bolt.

As shown in FIGS. 12 and 13, electrical components 92 are placed on the top of the connecting stay 103U in a line in the width direction. The electrical components 92 are arranged in the order of an inverter 92b, a junction box 92a, and a DC/DC converter 92c from one side (left side) in the width direction in the upper part of the connecting stay 103U. The electrical component 92 and the connecting stay 103U are attached and fixed using fastening members such as bolts. As shown in FIG. 13, a plurality of second communication holes 103U1 are formed in the connection stay 103U at positions corresponding to the electrical components 92. The plurality of second communication holes 103U1 are vertically penetrating holes through which a cable connected to the electrical equipment 92 placed on the connection stay 103U can be routed. Furthermore, the plurality of communication holes can release heat released from the electrical component 92. Note that the plurality of second communication holes 103U1 only need to be able to route cables connected to the electrical component 92, and their number, shape, and position are not limited to the above configuration.

As shown in FIG. 16, a gap (routing space) E is formed between the lower surface of the connection stay 103U and the upper surface of the battery unit 90. In the routing space E, various cables connected to the electrical components 92 provided in the swing work machine 1 are routed. In this embodiment, a cable 91a connected to the lower part of the inverter 92b and the electric motor 91 is routed in the routing space E.

As shown in FIGS. 4, 5, 6, and 17, the swing work machine 1 includes a shroud 110 that arranges a radiator 94 and an oil cooler 30 above the hydraulic pump P and the electric motor 91. The shroud 110 is a structure that surrounds and supports both the radiator 94 (radiator fan 94a) and the oil cooler 30 (oil cooler fan 30a), and supports the radiator fan 94a and the oil cooler fan 30a so that they are lined up in the front-rear direction. do. Specifically, the shroud 110 supports the radiator fan 94a on the front side and supports the oil cooler fan 30a on the rear side. The shroud 110 has a fixed part 111 and a guide part 112.

As shown in FIGS. 18 and 19, the fixed portion 111 surrounds the radiator fan 94a and the oil cooler fan 30a, and supports the radiator 94 and the oil cooler 30. The fixed portion 111 covers the front side of the radiator fan 94a and the rear side of the oil cooler fan 30a. Furthermore, the fixing portion 111 covers the upper and lower sides of the radiator fan 94a and the oil cooler fan 30a. The fixing part 111 has a lower plate part 111a, an upper plate part 111b, a front plate part 111c, a rear plate part 111d, and a partition wall 111e. The lower plate portion 111a is a plate-shaped portion that constitutes the lower side of the fixing portion 111, and is arranged so that the plate surface faces in the vertical direction.

As shown in FIG. 18, the upper plate part 111b is a plate-shaped part that constitutes the upper side of the fixing part 111, and is arranged so that the plate surface faces in the vertical direction. The upper plate part 111b is arranged above the lower plate part 111a, and is arranged facing away from the lower plate part 111a in the vertical direction.
As shown in FIG. 18, the front plate part 111c is a plate-shaped part that constitutes the front side of the fixing part 111, and extends upward from the front end of the lower plate part 111a, reaching the front end of the upper plate part 111b. ing.

As shown in FIG. 18, the rear plate part 111d is a plate-shaped part that constitutes the rear side of the fixing part 111, and extends upward from the rear end of the lower plate part 111a, and behind the upper plate part 111b. The end has been reached. That is, the front plate part 111c and the rear plate part 111d are disposed facing each other and separated from each other in the front-rear direction.
As shown in FIGS. 18 and 19, the partition wall 111e is a wall that partitions the radiator fan 94a and the oil cooler fan 30a. The partition wall 111e is arranged to extend in the vertical direction, and connects the middle part of the upper plate part 111b in the front-rear direction and the middle part of the lower plate part 111a in the front-rear direction.

As shown in FIGS. 18 and 19, the guide portion 112 extends rearward and outward in the width direction from the front portion of the fixed portion 111, and is designed to protect the cooling air generated by driving the radiator fan 94a from the oil cooler fan 30a. guides at least one of the cooling air generated by the drive of the cooling air. In this embodiment, the guide portion 112 guides cooling air generated by driving the radiator fan 94a. The guide portion 112 is a rectifying plate extending obliquely to the right rear from the front plate portion 111c, and guides the cooling air along the plate surface. One end (front left end) of the guide section 112 is provided at the outer (right side) end in the width direction of the front plate section 111c, and the other end (rear right end) of the guide section 112 is provided at the outer end (right side) of the front plate section 111c in the width direction. It is inclined rearward, and reaches the middle part of the oil cooler fan 30a in the front-rear direction when viewed from the side, and also reaches the front part of the opening of the exterior cover 70. That is, the cooling air guided by the guide portion 112 is discharged from the rear room R to the outside through the opening.

As shown in FIGS. 4, 5, 6, and 17, the shroud 110 is disposed on the other side (right side) of the support frame 65 in the width direction. Specifically, as shown in FIGS. 20A and 20B, the shroud 110 is fixed to a fixed bracket 65B attached to the first leg 65a. The fixing bracket 65B extends downward from the first extending portion 65a2, and reaches the right side and upper side of the battery unit 90. A shroud 110 is attached and fixed with fastening members such as bolts. As shown in FIG. 20A, the shroud 110 supports the oil cooler 30 and radiator 94 together with the fixed bracket 65B by being fastened together with the fastening member. In this embodiment, the rear plate portion 111d is fastened together with the rear side of the oil cooler 30 and the rear side of the fixed bracket 65B. The partition wall 111e is fastened together with the front side of the radiator 94 and the middle part of the fixing bracket 65B. The front plate portion 111c is fastened and fixed to the front side of the radiator 94 and the front side of the fixing bracket 65B. Note that the attachment of the oil cooler 30 and the radiator 94 is not limited to the above configuration, and may be fixed to the fixing bracket 65B separately from the shroud 110, as shown in FIG. 20B.

As shown in FIG. 11, the swing work machine 1 includes a control device 120 and a storage section 121. The control device 120 is a device composed of an electric/electronic circuit, a program stored in a CPU, etc., and controls various devices included in the swing work machine 1. For example, the control device 120 controls the rotation speed of the electric motor 91 based on the operation of an operable rotation speed operating tool 5c provided around the driver's seat 8. Further, the control device 120 performs starting control of the swing work machine 1 based on the operation of a starter switch 7 that is provided around the driver's seat 8 and is capable of starting the swing work machine 1 .

The storage unit 121 is a nonvolatile memory or the like, and stores various information related to control of the control device 120. For example, the storage unit 121 stores information such as a table regarding the rotation speed of the electric motor 91 with respect to the operation amount of the rotation speed operating tool 5c.
As shown in FIGS. 11, 12, etc., the battery unit 90 includes a plurality of batteries 90a. The plurality of batteries 90a are connected in parallel to each other. The battery 90a is capable of storing electricity, and is, for example, a secondary battery such as a lithium ion battery or a lead acid battery. The battery 90a has a plurality of cells inside, and the plurality of cells are electrically connected in series and/or in parallel. In this embodiment, the battery unit 90 has two batteries 90a. Note that the number of batteries 90a included in the battery unit 90 may be plural, and is not limited to two, and may be three or more.

As shown in FIG. 11, the swing work machine 1 includes a connection switching section 131. The connection switching unit 131 switches the power supply path 132 from the battery 90a to the electric motor 91 between a connected state and a disconnected state for each battery 90a. The connection switching unit 131 switches between a connected state and a cutoff state, for example, by opening and closing a relay on at least a portion of the power supply path 132. As a result, the battery unit 90 outputs power from one of the plurality of batteries 90a that is in the connected state, and stops outputting power from the other battery 90a that is in the disconnected state. The control device 120 controls the connection switching unit 131, that is, sets the battery 90a that outputs power from the battery unit 90.

Furthermore, each battery 90a has a BMU (battery management unit) 123 that monitors and controls the battery 90a. The BMU 123 acquires the voltage, temperature, current, terminal voltage of internal cells, etc. of the battery 90a, and calculates the remaining capacity of the battery 90a. Further, the BMU 123 can control the opening and closing of a relay inside the battery 90a, and can control the start and stop of power supply from the battery 90a. Note that the BMU 123 may be built in each battery 90a, or may be installed outside each battery 90a.

The control device 120 sets one battery 90a among the plurality of batteries 90a in a connected state as an output battery that outputs power from the battery unit 90, and sets the other batteries 90a in a disconnected state as a stopped battery that does not output power. Set as . The control device 120 includes a battery control section 120a that performs switching control of output batteries.
The battery control unit 120a is communicably connected to the connection switching unit 131 by wire or wirelessly, and controls the connection switching unit 131 by transmitting a signal. Thereby, the battery control unit 120a switches between the connected state and the disconnected state of the plurality of batteries 90a, and performs switching control (switching process) between the output battery and the stopped battery.

The battery control unit 120a performs switching control between the output battery and the stopped battery based on predetermined conditions. Specifically, when the drive limiting device 47 prohibits or limits the driving of the working device 20, the battery control unit 120a controls the selection tool 122 communicably connected to the control device 120 and the plurality of batteries 90a. The output battery and the stop battery are set based on the remaining capacity of each. In other words, the battery control unit 120a performs the process of switching the output battery after the driving of the work device 20 is prohibited or restricted by the drive restriction device 47.

Specifically, the control device 120 includes a state acquisition unit 120d that acquires information indicating whether the drive restriction device 47 is in a state where the drive of the working device 20 is permitted, prohibited or restricted. Based on the information acquired by the status acquisition unit 120d, the battery control unit 120a performs a process of switching the output battery after the driving of the working device 20 is prohibited or restricted by the drive restriction device 47. In the present embodiment, the state acquisition unit 120d determines whether the unload valve 48 is in the supply position 48a or in the cutoff position based on a signal acquired from a sensor that is connected to the control device 120 and detects the operating state of the unload operating tool 5b. The position 48b is acquired.

Note that the control device 120 only needs to set the output battery and the stop battery when the work device 20 is not being driven, and can detect the state in which the work device 20 is not being driven separately from the operation of the drive limiting device 47. , an output battery, and a stop battery may be set. For example, the control device 120 may obtain operation information of the operating device 5 and obtain information as to whether the hydraulic equipment M and the work device 20 are not being driven.

The battery control unit 120a sets the battery 90a selected via the selection tool 122 as the output battery. On the other hand, the battery control unit 120a sets the battery 90a that has not been selected via the selection tool 122 as a stopped battery.
The selection tool 122 selects one battery 90a from among the plurality of batteries 90a based on the operator's operation. That is, the selection tool 122 receives an instruction from the operator to select the battery 90a to be used as the output battery. For example, the selection tool 122 is a plurality of operation switches that are arranged around the driver's seat 8 and can be operated by pressing. Each of the plurality of operation switches is associated with a battery 90a, and when one operation switch is operated, one battery 90a associated with the one operation switch is selected.

Note that the configuration of the selection tool 122 is not particularly limited, as long as it can select one battery 90a among the plurality of batteries 90a. Further, the selection tool 122 may perform a selection operation of the battery 90a in conjunction with the display device 124a. The selection tool 122 may be one that allows selection of one battery 90a icon from a plurality of battery 90a icons displayed on the display device 124a by key button operation, jog dial operation, touch panel operation, or the like.

Based on the remaining capacity detected by the capacity detecting unit, the battery control unit 120a selects batteries 90a that can be selected as output batteries using the selection tool 122 from batteries 90a whose remaining capacity is equal to or greater than a first threshold value set to a value greater than zero. limited to.
The battery control unit 120a detects that the remaining capacity of the battery 90a selected as the output battery is insufficient (for example, the remaining capacity is less than a first threshold value) and the supply of power to the electric motor 91 is stopped, and the remaining capacity of the other battery 90a is If there is a battery 90a among them that has a remaining capacity that can supply power to the electric motor 91, the output battery is switched to one of the batteries 90a that has the remaining capacity.

In addition, when the remaining capacity of the output battery is zero and there is a battery 90a whose remaining capacity exceeds zero and is less than the first threshold value, the battery control unit 120a selects a battery that can be selected as the output battery using the selection tool 122. 90a is limited to batteries 90a whose remaining capacity exceeds zero, and the output battery is switched to one of the batteries 90a whose remaining capacity is capable of supplying power to the electric motor 91. Alternatively, when the remaining capacity of the output battery is zero and there is a battery 90a whose remaining capacity exceeds zero and is less than the first threshold value, the battery control unit 120a selects the remaining capacity regardless of the selection of the selection tool 122. The battery 90a for which the value exceeds zero and is less than the first threshold value may be automatically set as the output battery.

The capacity detectors each detect the remaining capacity of the battery 90a. The capacity detection unit is communicably connected to the control device 120 by wire or wirelessly, and outputs information regarding the detected remaining capacity of the battery 90a to the control device 120. In this embodiment, the BMU 123 provided in each of the plurality of batteries 90a performs the function of the capacity detection section. For example, the BMU 123 detects the remaining capacity of the battery 90a using the terminal voltage of the cells inside the battery 90a and a voltage measurement method. Note that the method for detecting the remaining capacity of the battery 90a is not limited to the voltage measurement method, and may be a coulomb counter method, a battery cell modeling method, an impedance track method, or the like. Further, the capacitance detection section may be provided separately from the BMU 123.

Further, the battery control unit 120a determines that the remaining capacity of the battery 90a selected as the output battery has decreased below the first threshold value, and there is a battery 90a among the other batteries 90a whose remaining capacity is equal to or higher than the first threshold value. In this case, the output battery is switched to one of the batteries 90a whose remaining capacity is equal to or higher than the first threshold value. As shown in FIG. 11, the battery control section 120a has a selection section 120a1. The selection unit 120a1 selects one of the plurality of batteries 90a as the output battery. Specifically, when the battery unit 90 includes batteries 90a whose remaining capacity is equal to or greater than the first threshold, the selection unit 120a1 selects any of the batteries 90a whose remaining capacity is equal to or greater than the first threshold as the output battery. In other words, if the battery unit 90 includes a battery 90a whose remaining capacity is equal to or greater than the first threshold, the selection unit 120a1 does not select the battery 90a whose remaining capacity is less than the first threshold as an output battery. At this time, for example, the battery 90a with the largest remaining capacity may be selected from among the batteries 90a whose remaining capacity is less than the first threshold value and greater than or equal to zero.

The swing work machine 1 also includes a notification device 124, and the battery control unit 120a determines the remaining capacity of the battery 90a selected as the output battery based on the remaining capacity detected by the capacity detection unit (BMU 123). When the voltage falls below the first threshold, the notification device 124 is caused to issue a notification prompting switching of the output battery. Further, the battery control unit 120a determines that the remaining capacity of the battery 90a selected as the output battery has decreased below the first threshold value, and there is no battery 90a among the other batteries 90a whose remaining capacity is equal to or greater than the first threshold value. In this case, the notification device 124 is made to issue a notification urging charging. Furthermore, when the remaining capacity of the battery 90a selected as the output battery falls below a second threshold value that is smaller than the first threshold value, the control device 120 causes the notification device 124 to issue a warning that the remaining capacity is exhausted.

The notification device 124 is a device that notifies an operator or administrator of the remaining capacity of the plurality of batteries 90a detected by the capacity detection unit (BMU 123). The notification device 124 is communicably connected to the control device 120 and is controlled by the control device 120. The notification device 124 notifies the operator riding the swinging work machine 1 of the remaining capacity of the battery 90a using sound, light, video, or a combination thereof. Specifically, when the notification device 124 notifies the remaining capacity of the battery 90a using an image, the notification device 124 is a display device 124a such as a monitor that is provided in the swing work machine 1 and displays an image.

As shown in FIG. 21A, the battery control unit 120a causes the display device 124a to display the remaining capacity of each battery 90a. The battery control unit 120a displays the remaining capacity of the output battery 124a1 and the remaining capacity of the stopped battery 124a2 in different display formats. For example, the display 124a2 of the remaining capacity of the stopped battery is displayed in a grayed out manner. As shown in FIG. 21B, when the remaining capacity of the output battery falls below the first threshold value, the battery control unit 120a displays a prompt to switch the output battery near the display 124a1 of the remaining capacity of the output battery. . As shown in FIG. 21C, when the remaining capacity of the output battery falls below the first threshold and there is no battery 90a whose remaining capacity is equal to or greater than the first threshold among the other batteries 90a, the battery control unit 120a Display 124a3 of the remaining capacity of the battery 90a whose remaining capacity is less than the first threshold value and/or a message that it cannot be switched as an output battery and that charging is requested is displayed in the vicinity thereof. Further, as shown in FIG. 21D, when the remaining capacity of the output battery falls below the second threshold, the battery control unit 120a displays 124a4 the remaining capacity of the battery 90a whose remaining capacity is below the second threshold, and/or Or, a message indicating that the output battery has no remaining capacity and prompting charging is displayed near the output battery.

Further, when the notification device 124 uses sound to notify the remaining capacity of the battery 90a, the notification device 124 is an audio output device 124b (speaker) that provides notification with audio. Note that the notification device 124 only needs to be able to notify the operator or manager of the remaining capacity of the battery 90a, and the notification device 124 is provided around the driver's seat 8 and is composed of a plurality of lamps (for example, LED light bulbs). The light emitting device 124c (indicator) may be any one or more of the display device 124a, the audio output device 124b, and the light emitting device 124c.

The battery control unit 120a performs a first process, a second process, and a third process to perform an output battery switching process. Specifically, when performing output battery switching processing, the battery control unit 120a first instructs the connection switching unit 131 to turn off all batteries 90a among the plurality of batteries 90a including the output battery ( 1st process).
After the first process, the battery control unit 120a instructs the connection switching unit 131 to connect the battery 90a set as the output battery (second process). Further, the control device 120 connects the battery 90a selected as the output battery and the inverter 92b in the second process.

After the second process, the battery control unit 120a instructs the battery 90a to start supplying power to the electric motor 91 from the battery 90a, which has been set as an output battery and is in a connected state. Specifically, the battery control unit 120a instructs the BMUs 123 provided in each of the plurality of batteries 90a to start supplying power.
Hereinafter, a series of steps for setting the output battery and the stop battery by the control device 120 (battery control unit 120a) will be explained mainly using FIG. 22. First, the control device 120 determines whether the unload valve 48 is in the cutoff position 48b (S1). If it is determined that the unload valve 48 is not in the cutoff position 48b (S1, No), the control device 120 continues the process in S1 and monitors that the unload valve 48 is switched to the cutoff position 48b.

If it is determined that the unload valve 48 is in the cutoff position 48b (S1, Yes), the control device 120 determines whether the starter switch 7 has been operated based on the operation signal input from the starter switch 7 ( S2). If the starter switch 7 is not operated (S2, No), the control device 120 continues the process of S2 and monitors whether the starter switch 7 is operated.

If it is determined that the starter switch 7 has been operated (S2, Yes), the battery control unit 120a instructs the connection switching unit 131 to turn off all batteries 90a among the plurality of batteries 90a including the output battery, The connection switching unit 131 switches all batteries 90a to a cutoff state (first process, S3).
When the battery control unit 120a performs the first process (S3), based on the remaining capacity detected by the BMU 123, the battery control unit 120a selects a battery 90a that can be selected as an output battery using the selection tool 122, and selects a battery 90a whose remaining capacity is equal to or higher than the first threshold value. (S4), and the operator operates the selection tool 122 to select the designated battery 90a as the output battery from among the batteries 90a set to be selectable, and switches to the connected state (S5). Specifically, the battery control unit 120a instructs the connection switching unit 131 to put the battery 90a set as an output battery into the connected state, and the connection switching unit 131 switches the battery 90a to the connected state, and the control device 120 connects the battery 90a and the inverter 92b (second process).

Next, after the second process, the battery control unit 120a instructs the BMU 123 to start supplying power to the electric motor 91 from the battery 90a, which has been set as an output battery and is in a connected state, and the BMU 123 The internal relay is controlled to open and close, and power supply from the output battery is started (third process, S6).
Thereafter, the battery control unit 120a determines whether the remaining capacity of the output battery is less than the first threshold value based on the remaining capacity of the output battery detected by the BMU 123 (S7). If it is determined that the remaining capacity of the output battery is equal to or greater than the first threshold (S7, No), the battery control unit 120a proceeds to the process of S15.

When the battery control unit 120a determines that the remaining capacity of the output battery is less than the first threshold (S7, Yes), the battery control unit 120a selects a battery whose remaining capacity is equal to or higher than the first threshold based on the remaining capacity of the output battery detected by the BMU 123. It is determined whether or not 90a exists (S8).
When the battery control unit 120a determines that there is a battery 90a whose capacity is equal to or higher than the first threshold value (S8, Yes), as shown in FIG. A message is displayed to prompt battery switching, and the notification device 124 is caused to issue a notification to prompt output battery switching (S9).

Thereafter, the battery control unit 120a determines whether the unload valve 48 is at the cutoff position 48b (S10). If it is determined that the unload valve 48 is not in the cutoff position 48b (S10, No), the battery control unit 120a continues the process in S10 and monitors that the unload valve 48 is in the cutoff position 48b.
On the other hand, when the battery control unit 120a determines that the unload valve 48 is in the cutoff position 48b (S10, Yes), the battery control unit 120a determines whether a predetermined time has elapsed since the unload valve 48 was switched to the cutoff position 48b. A judgment is made (S11). If the battery control unit 120a determines that the predetermined time has not elapsed (S11, No), it continues the process of S11 and monitors that the predetermined time has elapsed. When a predetermined period of time has elapsed (S11, Yes), the battery control unit 120a instructs the connection switching unit 131 to turn off all the batteries 90a among the plurality of batteries 90a including the output battery, and the connection switching unit 131 All batteries 90a are switched to a cutoff state (first process, S12).

Next, the selection unit 120a1 selects one of the batteries 90a whose remaining capacity is equal to or higher than the first threshold in the battery unit 90 as the output battery, and the battery control unit 120a selects the battery 90a selected by the selection unit 120a1 as the output battery. The connection switching unit 131 instructs the connection switching unit 131 to switch the battery 90a to the connection state, and the control device 120 sets the battery 90a and the inverter 92b to the connection state (second process, S13). ).

Next, the battery control unit 120a instructs the BMU 123 to start supplying power to the electric motor 91 from the battery 90a, which has been set as an output battery and is in a connected state, and the BMU 123 controls the opening and closing of the relay inside the battery 90a. , starts supplying power to the output battery (third process, S14). After that, the battery control unit 120a determines whether to end the operation of the working machine 1 (S15). When the battery control unit 120a determines that the operation is not to be ended (S15, No), the process returns to S7.

On the other hand, if the battery control unit 120a determines to end the operation (S16, Yes), it ends a series of controls related to output battery switching and performs a predetermined operation stop process. Note that the determination as to whether or not to end the operation of the working machine 1 may be made, for example, based on whether or not the engine stop switch has been operated. The operation stop process may include, for example, a process of switching all batteries 90a to a cut-off state.

Further, when the battery control unit 120a determines in S8 that there is no battery 90a having a power equal to or higher than the first threshold value (S8, No), the battery control unit 120a displays, for example, the display 124a3 of the display device 124a, as shown in FIG. 21C. and/or a message indicating that the output battery cannot be switched is displayed in the vicinity thereof, and the notification device 124 is made to issue a notification that the output battery cannot be switched and prompting charging (S16).

Next, the battery control unit 120a acquires a signal from the BMU 123 and determines whether the charging process has started (S17). When the charging process is started, the battery control unit 120a ends a series of controls regarding switching of output batteries.
On the other hand, if the charging process has not been started (S17, No), the battery control unit 120a determines that the remaining capacity of the output battery is at the second threshold based on the remaining capacity of the output battery detected by the BMU 123. It is determined whether or not it is less than (S18). If it is determined that the remaining capacity of the output battery is less than the second threshold (S18, No), the battery control unit 120a returns to the process of S16.

When the battery control unit 120a determines that the remaining capacity of the output battery is less than the second threshold (S18, Yes), as shown in FIG. 21D, the battery control unit 120a determines that the remaining capacity of the output battery is less than the second threshold. The remaining capacity display 124a4 of the output battery 90a and/or its vicinity are displayed to indicate that the output battery has no remaining capacity and to prompt charging (S19).
Thereafter, the battery control unit 120a determines whether the remaining capacity of the output battery is zero based on the remaining capacity of the output battery detected by the BMU 123 (S20). If it is determined that the remaining capacity of the output battery is not zero (S20, No), the battery control unit 120a returns to the process of S16.

On the other hand, if it is determined that the remaining capacity of the output battery is zero (S20, Yes), the battery control unit 120a stops the power supply to the electric motor 91 from the battery 90a connected as the output battery. The BMU 123 instructs the BMU 123 to open and close the relay inside the battery 90a, and stops the power supply from the output battery (S21). That is, when the remaining capacity of the output battery is zero, the battery control unit 120a cuts off the connection between the output battery and the power supply path (power supply line) 132 by controlling the opening and closing of the relay.

Further, as shown in FIG. 21E, the battery control unit 120a causes the notification device 124 to issue a notification to prompt the operation of the unload operation tool 5b (S22), and based on the remaining capacity of the output battery detected by the BMU 123, , it is determined whether there is a battery 90a whose remaining capacity is other than zero, that is, whether there is a battery 90a whose remaining capacity exceeds zero (S23). When the battery control unit 120a determines that there is no battery 90a with a remaining capacity other than zero (S23, No), the battery control unit 120a ends a series of controls regarding switching of output batteries.

On the other hand, if the battery control unit 120a determines that there is a battery 90a with a remaining capacity other than zero (S23, Yes), the battery control unit 120a determines whether the unload valve 48 is at the cutoff position 48b (S24). If the battery control unit 120a determines that the unload valve 48 is not in the cutoff position 48b (S24, No), it continues the process of S24 and monitors that the unload valve 48 is switched to the cutoff position 48b.

If the battery control unit 120a determines that the unload valve 48 is in the cutoff position 48b (S24, Yes), it determines whether a predetermined time has elapsed since the unload valve 48 was switched to the cutoff position 48b. (S25). If the battery control unit 120a determines that the predetermined time has not elapsed (S25, No), it continues the process of S11 and monitors that the predetermined time has elapsed. If the battery control unit 120a determines that the predetermined time has elapsed (S25, Yes), the battery control unit 120a instructs the connection switching unit 131 to turn off all the batteries 90a among the plurality of batteries 90a including the output battery, and disconnects them. The switching unit 131 switches all batteries 90a to a cutoff state (first process, S26).

Next, based on the remaining capacity detected by the BMU 123, the battery control unit 120a sets the battery 90a that is selectable as an output battery using the selection tool 122 as the battery 90a whose remaining capacity is other than zero (S27), so that the battery 90a can be selected as an output battery. The operator operates the selection tool 122 to select the specified battery 90a as the output battery from among the batteries 90a set in , and switches it to the connected state (S28). Specifically, the battery control unit 120a instructs the connection switching unit 131 to put the battery 90a set as an output battery into the connected state, and the connection switching unit 131 switches the battery 90a to the connected state, and the control device 120 connects the battery 90a and the inverter 92b (second process).

Next, the battery control unit 120a instructs the BMU 123 to start supplying power to the electric motor 91 from the battery 90a, which has been set as an output battery and is in a connected state after the second process, and the BMU 123 relay opening/closing control to start supplying power to the output battery (third process, S29).
Thereafter, the battery control unit 120a determines whether or not to end the operation of the work equipment 1 (S30), and if it is determined to end the operation (S30, Yes), a series of steps related to switching the output battery are performed as in S15. Control is ended and predetermined operation stop processing is performed. When the battery control unit 120a determines that the operation is not to be ended (S30, No), the process returns to S16.

As shown in FIG. 11, the swing work machine 1 includes a first drive motor 30b that drives an oil cooler fan 30a, and a second drive motor 94b that drives a radiator fan 94a. The radiator fans 94a can be driven independently from the electric motor 91. Control of the oil cooler fan 30a and the radiator fan 94a will be described below.

As shown in FIG. 11, the first drive motor 30b and the second drive motor 94b are each connected to a control device 120, and the control device 120 controls the driving of the first drive motor 30b and the second drive motor 94b. The fan control unit 120b has a fan control unit 120b. The fan control unit 120b independently controls the first drive motor 30b (radiator fan 94a) and the second drive motor 94b (oil cooler fan 30a).

As shown in FIG. 11, the swing work machine 1 includes a water temperature detection section 126 and an oil temperature detection section 127. The water temperature detection unit 126 is a sensor that detects the temperature of cooling water (refrigerant) as a voltage value. The water temperature detection unit 126 is provided, for example, in the feed waterway 95b, and detects the temperature of the cooling water flowing toward the radiator 94. The water temperature detection unit 126 is connected to the control device 120 by wire or wirelessly, and outputs detected cooling water temperature information to the control device 120 as a signal.

The oil temperature detection unit 127 is a sensor that detects the temperature of hydraulic oil as a voltage value. The oil temperature detection unit 127 is provided, for example, in the second pipe line 42 and detects the temperature of the hydraulic oil flowing toward the oil cooler 30. The oil temperature detection unit 127 is connected to the control device 120 by wire or wirelessly, and outputs detected temperature information of the hydraulic oil to the control device 120 as a signal.
The fan control unit 120b controls the drive of the radiator fan 94a so that the temperature of the cooling water does not exceed a set temperature based on the temperature of the cooling water detected by the water temperature detection unit 126 and a preset control map. . Further, when the temperature of the hydraulic oil detected by the oil temperature detection unit 127 is less than a predetermined value, the fan control unit 120b stops driving the oil cooler fan 30a, and controls the temperature of the hydraulic oil detected by the oil temperature detection unit 127 to stop driving the oil cooler fan 30a. is equal to or higher than a predetermined value, the temperature of the hydraulic oil is controlled based on a preset control map so as not to exceed the preset temperature.

As shown in FIG. 11, the operating device 5 has a rotation speed operating tool 5c, and the control device 120 has a rotation speed control section 120c. The rotation speed operating tool 5c receives a setting input of the rotation speed range (upper limit value and lower limit value of the rotation speed) of the electric motor 91 from an operator. Specifically, a plurality of selectable rotation speed ranges are set in advance, and the operator can select a desired rotation speed range by operating the rotation speed operating tool 5c.

The rotation speed control unit 120c has a normal mode and an AI (auto idle) mode. In the normal mode, the rotation speed control unit 120c controls the rotation speed of the electric motor 91 using a rotation speed operating tool according to the load of the hydraulic pump P or the current consumption of the electric motor 91, which changes depending on the operating state of the working device 20. 5c to control within the set rotation speed range. In the AI mode, the rotation speed control unit 120c controls the rotation speed of the electric motor 91 to a predetermined idling rotation speed that is set lower than the lower limit of the rotation speed (for example, 1500 rpm) that can be set using the rotation speed operating tool 5c. (for example, 500 rpm).

The rotation speed control section 120c performs switching between the normal mode and the AI mode based on the current value detected by the current detection section that detects the current (current value) of the power output from the battery unit 90 or the inverter 92b. When the magnitude of the current value output by the battery unit 90 can be changed according to the load of the electric motor 91, the current detection section detects the current value output from the battery unit 90 or the inverter 92b. On the other hand, if the magnitude of the current value output by battery unit 90 cannot be changed depending on the load of electric motor 91, the current detection section detects the current value output from inverter 92b. The current detection unit is connected to the control device 120 so as to be able to communicate wirelessly or by wire, and outputs the detected current value to the control device 120.

In this embodiment, the battery unit 90 is capable of changing the magnitude of the current value that it outputs, and the current detection section detects the current value that is output from the battery unit 90. This is the BMU 123.
For example, when the control lever 5a is operated, the spool is moved by the operation, and the control valves V1 to V8 supply hydraulic fluid to the hydraulic equipment M to be controlled in an amount proportional to the amount by which the spool is moved. As a result, the load on the hydraulic pump P that discharges hydraulic oil increases, and the current consumption of the electric motor 91 that drives the hydraulic pump P increases. Therefore, the battery unit 90 increases the magnitude of the current value it outputs, and the current value detected by the BMU 123 increases. In other words, when the amount of operation of the operating lever 5a from the neutral position increases, the current value detected by the BMU 123 increases.

On the other hand, when the operating lever 5a is operated from the operated state to the neutral position side, the operating amount of the operating lever 5a decreases, the load on the hydraulic pump P decreases, and the current of the electric motor 91 that drives the hydraulic pump P decreases. Consumption decreases. Therefore, the battery unit 90 reduces the magnitude of the current value it outputs, and the current value detected by the BMU 123 decreases. In other words, when the amount of operation of the operating lever 5a from the neutral position decreases, the current value detected by the BMU 123 decreases.

Note that when the current detection unit detects the current value output from the inverter 92b, when the operating lever 5a is operated from the neutral position, that is, when the operating amount of the operating lever 5a increases, the load on the hydraulic pump P increases and the corresponding The current consumption of the electric motor 91 that drives the hydraulic pump P increases. Therefore, the inverter 92b increases the magnitude of the current value it outputs, and the current value detected by the current detection section increases. In other words, when the amount of operation of the operating lever 5a from the neutral position increases, the current value detected by the current detection section increases.

On the other hand, when the operating lever 5a is operated from the operated state to the neutral position side, the operating amount of the operating lever 5a decreases, the load on the hydraulic pump P decreases, and the current of the electric motor 91 that drives the hydraulic pump P decreases. Consumption decreases. Therefore, the inverter 92b reduces the magnitude of the current value it outputs, and the current value detected by the current detection section decreases. In other words, when the amount of operation of the operating lever 5a from the neutral position decreases, the current value detected by the current detection section decreases.

To explain in detail how the rotation speed control unit 120c switches between the normal mode and the AI mode, the rotation speed control unit 120c switches the rotation speed when the current value detected by the current detection unit (BMU 123) is equal to or higher than a predetermined value (third threshold). The range of the motor rotation speed of the electric motor 91 is set according to the setting operation on the number operation tool 5c (normal mode). On the other hand, when the current value detected by the BMU 123 is less than the third threshold, the rotation speed control unit 120c switches to the AI mode and sets the motor rotation speed of the electric motor 91 to a predetermined idling rotation speed.

Specifically, when the current value detected by the BMU 123 is less than the third threshold, the rotation speed control unit 120c detects the current for a predetermined period of time (for example, 3 seconds or 4 seconds) after the current value becomes less than the third threshold. The motor rotation speed of the electric motor 91 is set within the range set by the rotation speed operating tool 5c according to the current value detected by the section, and after a predetermined time has elapsed, the motor rotation speed of the electric motor 91 is set to a predetermined value by switching to the AI mode. Set the idling speed to Specifically, when the detected current value is less than the third threshold, the rotation speed controller 120c controls the motor rotation speed within the range set by the rotation speed operating tool 5c for a predetermined period of time after the current value becomes less than the third threshold. Set to the lower limit of . Further, after a predetermined period of time has elapsed, the rotation speed control unit 120c switches to the AI mode and sets the motor rotation speed of the electric motor 91 to an idling rotation speed that is lower than the lower limit of the above range.

That is, in the normal mode, when the current value detected by the BMU 123 becomes less than a predetermined value, the rotation speed control unit 120c maintains the normal mode for a predetermined time, and switches to the AI mode after the predetermined time has elapsed.
On the other hand, in the AI mode, when the current value detected by the BMU 123 exceeds a predetermined value, the rotation speed control unit 120c immediately switches to the normal mode. Note that the third threshold value is a threshold value that is set in advance and stored in the storage unit 121, and is a threshold value that is set in advance and stored in the storage unit 121. It is set based on the current value of the power output from the inverter 92b, and can be arbitrarily changed by an external terminal that is communicably connected to the control device 120 and operated by an administrator or worker.

As shown in FIG. 1, the hydraulic circuit of the swing working machine 1 includes a heating circuit H that heats the inside of the protection mechanism 80 using hydraulic oil used in the hydraulic circuit as a heat medium. The heating circuit H includes a heating device 130, the above-described first pipe line 41, and the second pipe line 42.
The heating device 130 heats the inside of the protection mechanism 80 by exchanging heat with the heat of the hydraulic oil flowing through the oil path 40 . The heating device 130 performs heat exchange between the oil passage 40, through which hydraulic oil heated by the drive of the hydraulic pump P or the hydraulic equipment M flows, and a medium such as the surrounding air. The heating device 130 is provided in either one of the first pipe line 41 and the second pipe line 42 in the hydraulic system circuit, and is an oil line through which hydraulic oil cooled (heat removed) by at least the oil cooler 30 flows. The oil passage 40 is provided in a different oil passage 40 from the oil passage 40 . In this embodiment, the heating device 130 is provided in the middle of the second pipe line 42 . The second pipe line 42 includes a first portion 42a through which hydraulic oil discharged from the hydraulic equipment M flows to the heating device 130, and a second portion 42b through which hydraulic oil discharged from the heating device 130 flows into the radiator 94. Contains.

As shown in FIG. 1, the heating device 130 includes a heat exchange section 130a and a blower fan 130b. The heat exchange section 130a is a section through which hydraulic oil flows and exchanges heat with a medium such as surrounding air. In this embodiment, the heat exchange section 130a is a plurality of fins. The plurality of fins 130a are arranged parallel to each other and spaced apart from each other by a predetermined distance, facing in a predetermined direction. The plurality of fins 130a are hollow inside, and the plurality of fins 130a are internally connected from the fin on one end side to the fin on the other end side. In other words, the hydraulic oil supplied from the first portion 42a flows through the fins at one end, and the hydraulic oil flows toward the fins at the other end through the interior of the fins at the middle. The hydraulic oil supplied to the fins on the other end side is discharged to the second portion 42b.

The blower fan 130b is a fan that is driven by electricity and blows air. The blowing fan 130b blows air from the heating device 130 into the protection mechanism 80. Specifically, the blower fan 130b sends air around the plurality of fins 130a into the protection mechanism 80. Thereby, the inside of the protection mechanism 80 can be heated by exchanging heat with the hydraulic oil via the plurality of fins 130a and sending warmed air into the protection mechanism 80.

Further, the swing work machine 1 can heat the inside of the protection mechanism 80 separately from the heating device 130. Specifically, at least one of the first pipe line 41 and the second pipe line 42 is arranged outside or inside the protection mechanism 80, and the surroundings of the first pipe line 41 and the second pipe line 42 are arranged outside or inside the protection mechanism 80. It exchanges heat with the air and heats the inside of the protection mechanism 80. In this embodiment, the first conduit 41 is arranged under the flooring (step) inside the protection mechanism 80 or under the driver's seat 8, and is arranged through holes such as slits formed in the flooring. The heat-exchanged air flows into the protection mechanism 80 through the heat exchanger. Note that the hole formed in the floor material has an operable shutter member, and can optionally be placed in a communicating state in which it communicates with the periphery of the first conduit 41 and the inside of the protection mechanism 80, or in a blocking state in which it is blocked. It may be possible to switch to Further, a fan for blowing air is provided around the first pipe line 41 and the second pipe line 42, and the warm air that has been heat exchanged around the first pipe line 41 and the second pipe line 42 is transferred to the inside of the protection mechanism 80. It may also be configured such that it is sent to

Note that, as shown in FIG. 1, the hydraulic circuit only needs to be able to heat the inside of the protection mechanism 80 using hydraulic oil as a heat medium, and at least the first pipe line 41 and the second pipe line 42. A bypass pipe line 50 may be provided on one side and arranged inside the protection mechanism 80 to heat the inside of the protection mechanism 80. The bypass pipe line 50 is an oil line whose middle part is routed inside the protection mechanism 80, and for example, it branches from the part (third part) on the side of the hydraulic pump P of the first pipe line 41, and is connected to the first pipe line. 41 on the hydraulic equipment M side (fourth section).

An operating valve 51 is provided at a branch point where the first pipe line 41 branches into the bypass pipe line 50. The operating valve 51 is, for example, a two-position switching valve with a solenoid valve, and is switched between a first position and a second position by energizing or demagnetizing a solenoid of the solenoid valve. This position restricts the hydraulic oil flowing from the passage 41 to the bypass pipe 50 and allows the hydraulic oil to flow from the third portion to the fourth portion of the first pipe 41. The second position is a position that allows hydraulic oil to flow from the first conduit 41 to the bypass conduit 50 and restricts hydraulic oil that flows from the third section to the fourth section of the first conduit 41. That is, when the operating valve 51 is located at the first position, the operating oil is not flowed into the bypass pipe 50 and the inside of the protection mechanism 80 is not heated (non-heating state). On the other hand, when the operating valve 51 is located at the second position, operating oil is flowed into the bypass pipe 50 to heat the inside of the protection mechanism 80 (heating state).

The above-described swing work machine 1 includes a swing base 2, a work device 20 provided on the swing base 2, a battery unit 90, an electric motor 91 driven by electric power output from the battery unit 90, and a drive of the electric motor 91. The battery unit 90 is arranged at the rear of the swivel base 2, and the electric motor 91 and the hydraulic pump P are arranged side by side in the front-rear direction on the side of the battery unit 90. has been done. According to the above configuration, the battery unit 90, the electric motor 91, and the hydraulic pump P can be arranged at the rear of the swivel base 2, and the electric motor 91 and the hydraulic pump P can be arranged in the space to the side of the battery unit 90. can. Thereby, the center of gravity can be located on the rear side of the swivel base 2, and the electric motor 91 and the hydraulic pump P can be arranged compactly.

Further, the swivel base 2 is rotatable around a pivot axis X that extends in the vertical direction, and the battery unit 90, electric motor 91, and hydraulic pump P are arranged behind the pivot axis X. According to the above configuration, by locating the center of gravity on the rear side of the rotation axis X, the swing work machine 1 can maintain its posture even when the work device 20 is being driven.
Further, the swing work machine 1 includes a lower traveling body 10 that supports the rotating base 2 around the rotation axis X and is movable, and the rear part of the battery unit 90 is located behind the rear end of the lower traveling body 10. It is located in According to the above configuration, by locating the relatively heavy battery unit 90 at the rear, it is possible to easily maintain the posture of the swing working machine 1.

The swing work machine 1 also includes cooling mechanisms 30 and 94 that are disposed to the side of the battery unit 90 and above the hydraulic pump P and the electric motor 91, and cool the hydraulic oil and the electric motor 91. According to the above configuration, the cooling mechanisms 30 and 94 can be located in the surplus space of the battery unit 90, the hydraulic pump P, and the electric motor 91.
The swing work machine 1 also includes a cover 70 that covers a battery unit 90, an electric motor 91, and a hydraulic pump P, and the cooling mechanisms 30 and 94 discharge air outward in the width direction from the space formed by the cover 70. . According to the above configuration, the cooling mechanisms 30 and 94 are capable of discharging heat released laterally from the battery unit 90 and heat released upward from the electric motor 91 and the hydraulic pump P to the outside of the cover 70. can.

The swing work machine 1 also includes a lower traveling body 10 that supports the swing base 2 around the swing axis X and is movable, a cover 70 that covers the battery unit 90, the electric motor 91, and the hydraulic pump P, and A support frame 65 is provided on the base 2 and supports the cover 70, and the rear part of the support frame 65 is located rearward than the rear part of the lower traveling body 10. According to the above configuration, by locating the support frame 65 at the rear of the lower traveling body 10, the strength of the rear part of the swing working machine 1 can be improved.

Further, the swing work machine 1 includes a protection mechanism 80 that is provided on the swing base 2 and protects the driver's seat 8, and the protection mechanism 80 is supported by the support frame 65. According to the above configuration, the protection mechanism 80 is disposed at the rear of the swivel base 2 and can be supported by the support frame 65 having relatively high strength. Thereby, the center of gravity can be moved to the rear side of the swivel base 2, and the protection mechanism 80 can be firmly supported.
The swing work machine 1 also includes a hydraulic oil tank T that stores hydraulic oil, a hydraulic equipment M that is driven by the hydraulic oil discharged by the hydraulic pump P, and a hydraulic equipment M that is mounted on the swivel base 2 and is equipped with the hydraulic oil discharged by the hydraulic pump P. The hydraulic oil tank T and the control valves V1 to V8 are arranged in front of the battery unit 90. According to the above configuration, the balance of the center of gravity in the front-rear direction can be maintained appropriately.

Further, the swing work machine 1 is provided with a protection mechanism 80 that is provided on the swing base 2 and protects the driver's seat 8, and the battery unit 90 has a center of gravity located on one side with respect to the center line L in the width direction of the swing base 2. The protection mechanism 80 is arranged on one side with respect to the center line L and in front of the battery unit 90, and the control valves V1 to V8 are arranged on one side with respect to the center line L and below the protection mechanism 80. The motor 91 and the hydraulic pump P are arranged on the other side with respect to the center line L and on the side of the battery unit 90, and the hydraulic oil tank T is arranged on the other side with respect to the center line L and in front of the electric motor 91 and the hydraulic pump P. It is located in According to the above configuration, by arranging the control valves V1 to V8 below the protection mechanism 80, the center of gravity can be lowered. Furthermore, even in a narrow space, the battery unit 90, control valves V1 to V8, electric motor 91, hydraulic pump P, and hydraulic oil tank T can be arranged, and the center of gravity of the entire swivel base 2 can be properly balanced. can be kept.

Further, the center of gravity of the battery unit 90 is arranged on one side with respect to the center line L in the width direction of the swivel base 2, and the working device 20 is arranged on the other side with respect to the center line L in the width direction. According to the above configuration, the battery unit 90 and the working device 20 can appropriately maintain the center of gravity balance in the width direction.
The swing work machine 1 also includes a swing base 2, a work device 20 provided on the swing base 2, a battery unit 90, an electric motor 91 driven by electric power output from the battery unit 90, and a drive of the electric motor 91. The battery includes a hydraulic pump P that discharges hydraulic oil, and an erected frame 103 that supports one side and the other side of a battery unit 90 and supports an electrical component 92 above the battery unit 90. According to the above configuration, by arranging the battery unit 90 below the electrical component 92, the center of gravity can be lowered. Furthermore, the upright frame 103 can firmly support the battery unit 90 by supporting one side and the other side of the battery unit 90.

The upright frame 103 also includes a first upright portion 103L that stands upright on the top of the swivel base 2 and supports one side of the battery unit 90, and a first upright portion 103L that stands up on the top of the swivel base 2 and supports one side of the battery unit 90. It has a second standing part 103R that supports the side surface, and a connecting stay 103U that connects the upper part of the first standing part 103L and the upper part of the second standing part 103R and supports the electrical component 92. According to the above configuration, the upright frame 103 supports the battery unit 90 by sandwiching one side and the other side of the battery unit 90, so that fluctuations in the relative position of the electrical component 92 with respect to the battery unit 90 can be suppressed.

Further, the first erected portion 103L supports the battery unit 90 in the front-rear direction on one side in the width direction of the battery unit 90, and the second erected portion 103R supports the battery unit 90 on the other side in the width direction of the battery unit 90. On the side, the battery unit 90 is supported in the front-rear direction. According to the above configuration, the first erected portion 103L and the second erected portion 103R support the battery unit 90 in the front-rear direction, and therefore can firmly support the battery unit 90.

The first upright portion 103L and the second upright portion 103R extend upward from the anti-sway portion 104 and are connected to the anti-sway portion 104 attached to the battery unit 90 in the front-back direction of the battery unit 90. It has an extending portion 105 that supports the stay 103U and has a shorter length in the front-rear direction than the anti-sway portion 104. According to the above configuration, the anti-sway portion 104 can firmly support the battery unit 90 against shaking in the width direction, and the extension portion 105 can support the electrical component 92 in a relatively compact manner.

Moreover, a routing space E for routing a cable is formed between the battery unit 90 and the connection stay 103U. According to the above configuration, since the connection stay 103U has little variation in relative position with respect to the battery unit 90, the cable can be routed while suppressing damage to the cable routed in the route space E due to vibration or the like. can.
The swing work machine 1 also includes a support board 100 that supports a battery unit 90, an electric motor 91, a hydraulic pump P, a first upright part 103L, and a second upright part 103R at the rear of the swing base 2. The substrate 100 is attached to the swivel base 2 via a plurality of mounting devices 101. According to the above configuration, the battery unit 90, the electric motor 91, the hydraulic pump P, the first erected portion 103L, the second erected portion 103R, and the support substrate 100 are attached to the swivel base 2 as a single unit. Therefore, it becomes easy to attach the battery unit 90, the electric motor 91, the hydraulic pump P, the first erected portion 103L, and the second erected portion 103R. Furthermore, vibrations transmitted from the swivel base 2 can be suppressed from reaching the battery unit 90, the electric motor 91, and the hydraulic pump P.

Further, the plurality of mounting devices 101 include a pair of front mounting devices 101a arranged in the width direction on the front side of the support substrate 100, and a pair of rear mounting devices 101b arranged in the width direction on the rear side of the support substrate 100. , and an intermediate mount device 101c disposed between the rear mount devices 101b on the rear side of the support substrate 100. According to the above configuration, since the plurality of mount members are evenly arranged, the battery unit 90 supported by the support substrate 100, the electric motor 91, the hydraulic pump P, the first upright part 103L, and the second upright part The portion 103R can be firmly supported.

Further, the intermediate mount device 101c is located further back than the rear mount device 101b. According to the above configuration, among the plurality of mount devices 101, the intermediate mount device 101c is disposed at the rearmost position. , the hydraulic pump P, the first erected portion 103L, and the second erected portion 103R can be firmly supported.

Further, the battery unit 90 has a connector 90b that outputs electric power, and the connector 90b is provided at the front part of the battery unit 90. According to the above configuration, by arranging the connector 90b at the front, it is possible to avoid damage to the connector 90b when an impact or the like is applied to the rear side of the battery unit 90.
Further, the electrical equipment 92 includes at least one of a junction box 92a and an inverter 92b connected to the battery unit 90. According to the above configuration, the junction box 92a and the inverter 92b connected to the battery unit 90 can be disposed near the battery unit 90 and can be firmly supported.

The swing work machine 1 also uses a swing base 2, a work device 20 provided on the swing base 2, a support board 100 provided on the swing base 2, a battery unit 90, and the power output from the battery unit 90. The support substrate 100 includes an electric motor 91 to be driven, a hydraulic pump P to discharge hydraulic oil by driving the electric motor 91, and a connecting portion 102 to connect the electric motor 91 and the hydraulic pump P. It has a first placing part 100a on which the connecting part 102 is placed, and a second placing part 100b on which the connecting part 102 is placed. According to the above configuration, the support substrate 100 can support the battery unit 90, the electric motor 91 and the hydraulic pump P connected to the connection part 102. In other words, the battery unit 90, the electric motor 91, and the hydraulic pump P are one structure supported by the support substrate 100, and can be easily attached to the swivel base 2.

Further, the support substrate 100 is attached to the swivel base 2 via a plurality of mounting devices 101. According to the above configuration, vibrations transmitted from the swivel base 2 can be suppressed from reaching the battery unit 90, the electric motor 91, and the hydraulic pump P.
Further, the plurality of mounting devices 101 include a pair of front mounting devices 101a arranged in the width direction on the front side of the support substrate 100, and a pair of rear mounting devices 101b arranged in the width direction on the rear side of the support substrate 100. , and an intermediate mount device 101c disposed between the rear mount devices 101b on the rear side of the support substrate 100. According to the above configuration, since the plurality of mount members are arranged at equal positions, the battery unit 90 supported by the support substrate 100, the electric motor 91, the hydraulic pump P, the first upright portion 103L, and the second The upright portion 103R can be firmly supported.

Further, the intermediate mount device 101c is located further back than the rear mount device 101b. According to the above configuration, by arranging the intermediate mounting device 101c at the rearmost position among the plurality of mounting devices 101, the battery unit 90, the electric motor 91, the hydraulic pump P, and the first vertical The installed portion 103L and the second upright portion 103R can be firmly supported.

Further, the connecting portion 102 is a coupling that supports the electric motor 91 and the hydraulic pump P so that power is transmitted from the electric motor 91 to the hydraulic pump P. According to the above configuration, it is possible to suppress fluctuations in the relative positions of the electric motor 91 and the hydraulic pump P. Therefore, in transmitting power from the electric motor 91 to the hydraulic pump P, loss of power can be suppressed.
Further, the swinging work machine 1 includes a swing stopper 104 that is erected on the upper part of the swing base 2 between the connecting part 102 and the battery unit 90 and is attached to one side of the battery unit 90. According to the above configuration, contact with the electric motor 91 and the hydraulic pump P due to the shaking of the battery unit 90 can be suppressed.

In addition, the swing work machine 1 has a swing stopper 104 installed on the other side of the battery unit 90, which is erected above the swing base 2 and is attached to the other side of the battery unit 90 separately from the swing stopper 104. We are prepared. According to the above configuration, since the battery unit 90 is supported by the anti-sway portion 104 on one side and the other side, shaking of the battery unit 90 can be further suppressed.

The swing work machine 1 also includes a swing base 2, a work device 20 provided on the swing base 2, a radiator fan 94a that cools the radiator 94, and an oil cooler that cools the oil cooler 30, separately from the radiator fan 94a. A fan 30a is provided. According to the above configuration, the radiator fan 94a and the oil cooler fan 30a can be driven individually.

The swing work machine 1 also includes a control device 120 that controls the driving of the radiator fan 94a and the oil cooler fan 30a, and the control device 120 independently controls the radiator fan 94a and the oil cooler fan 30a. do. According to the above configuration, cooling of the radiator 94 and cooling of the oil cooler 30 can be performed under separate control.
The swing work machine 1 also includes a water temperature detection section 126 that detects the temperature of cooling water, and an oil temperature detection section 127 that detects the temperature of hydraulic oil, and the control device 120 controls the temperature of the water detected by the water temperature detection section 126. The drive of the radiator fan 94a is controlled based on the temperature of the cooling water, and the drive of the oil cooler fan 30a is controlled based on the temperature of the hydraulic oil detected by the oil temperature detection section 127. According to the above configuration, the radiator fan 94a can be driven according to the temperature of the cooling water, and the oil cooler fan 30a can be driven according to the temperature of the hydraulic oil. Therefore, if one of the radiator 94 and the oil cooler 30 is low in temperature and does not require cooling, and the other is high in temperature and requires cooling, cooling can be performed according to the respective temperatures. Furthermore, since the radiator fan 94a and the oil cooler fan 30a can be controlled independently, it is possible to reduce the noise caused by driving the radiator fan 94a and the oil cooler fan 30a when cooling is not required.

Further, the control device 120 stops driving the oil cooler fan 30a when the temperature of the hydraulic oil detected by the oil temperature detection section 127 is less than a predetermined value. According to the above configuration, when the temperature of the hydraulic oil is low and it is necessary to warm up the hydraulic oil, the rotation of the fan of the oil cooler 30 is stopped, and the oil cooler 30 is prevented from interfering with warming up, Warming up can be promoted.
The swing work machine 1 also includes a shroud 110 that surrounds and supports both the radiator fan 94a and the oil cooler fan 30a. According to the above configuration, the relative positions of the radiator fan 94a and the oil cooler fan 30a can be fixed, and interference between the radiator fan 94a and the oil cooler fan 30a and other members can be suppressed.

Further, the shroud 110 supports the radiator fan 94a and the oil cooler fan 30a so that they are lined up in the front-rear direction. According to the above configuration, warm air moves upward, so by arranging the radiator fan 94a and the oil cooler fan 30a in the front-rear direction, the heat from one of the radiator 94 and the oil cooler 30 is suppressed from reaching the other, and efficiently. Can be cooled.

The shroud 110 also includes a fixed part 111 that surrounds the radiator fan 94a and the oil cooler fan 30a, and extends rearward and outward in the width direction from the front part of the fixed part 111. It has a guide part 112 that guides at least one side of the cooling air generated by driving the oil cooler fan 30a. According to the above configuration, by guiding the cooling air by the guide portion 112, it is possible to suppress air from remaining around the radiator fan 94a and the oil cooler fan 30a. Thereby, the efficiency of heat removal from the radiator fan 94a and the oil cooler fan 30a can be improved.

The swing work machine 1 also includes a battery unit 90, an electric motor 91 that is driven by electric power output from the battery unit 90, and a hydraulic pump P that discharges hydraulic oil by driving the electric motor 91. 91 and the hydraulic pump P are arranged on the side of the battery unit 90, and the radiator fan 94a and the oil cooler fan 30a are arranged on the side of the battery unit 90 and above the hydraulic pump P and the electric motor 91. According to the above configuration, the radiator fan 94a and the oil cooler fan 30a can be located in the surplus space of the battery unit 90, the hydraulic pump P, and the electric motor 91.

The swing work machine 1 also includes a cover 70 that covers a battery unit 90, an electric motor 91, and a hydraulic pump P. A radiator fan 94a and an oil cooler fan 30a blow air outward in the width direction from the space formed by the cover 70. Discharge. According to the above configuration, the radiator fan 94a and the oil cooler fan 30a discharge the heat released laterally from the battery unit 90 and the heat released upward from the electric motor 91 and the hydraulic pump P to the outside of the cover 70. can.

An electric working machine (swivel working machine) 1 according to one aspect of the present invention includes an electric motor 91, a battery unit 90 that supplies electric power to the electric motor 91, and a hydraulic pump that is driven by the electric motor 91 and discharges hydraulic oil. P, a hydraulic device M driven by hydraulic oil, and a working device 20 operated by the hydraulic device M, the battery unit 90 has a plurality of batteries 90a connected in parallel to each other. A control device 120 that sets an output battery that supplies power to the electric motor 91 from among the plurality of batteries 90a, and a power supply path 132 from the battery 90a to the electric motor 91 for each battery in a connected state and a disconnected state. When performing the output battery switching process, the control device 120 performs a first process of setting each battery 90a in a cut-off state, and a connection switching unit 131 that switches between the batteries 90a and 90a that are set as the output battery after the first process. A second process for bringing the motor into a connected state, and a third process for starting power supply to the electric motor 91 from the battery 90a set as the output battery after the second process. According to the above configuration, it is possible to reliably prevent excessive current from flowing when switching the output battery, and to extend the driving time of the swing work machine 1 using the plurality of batteries 90a.

The swing work machine 1 also includes a selection tool 122 that accepts an instruction from the operator to select the battery 90a as the output battery, and the control device 120 selects the battery 90a that has been selected via the selection tool 122 as the output battery. Set. According to the above configuration, the operator can easily switch the battery 90a to be used as the output battery using the selection tool 122.
Further, the swing work machine 1 includes a capacity detection unit 123 that detects the remaining capacity of the plurality of batteries 90a, and the control device 120 selects the batteries 90a that can be selected as output batteries using the selection tool 122, and the remaining capacity of the batteries 90a is a first threshold value. The battery 90a is limited to the above. According to the above configuration, it is possible to suppress selection of the battery 90a whose remaining capacity is less than a predetermined value as the output battery, and to preferentially use the battery 90a which has an extra capacity.

Further, the swinging work machine 1 includes a notification device 124 that notifies a decrease in the capacity of the battery 90a, and the control device 120 controls the control device 120 to notify when the remaining capacity of the battery 90a selected as the output battery decreases below a first threshold value. The notification device 124 is made to issue a notification prompting switching of the output battery. According to the above configuration, it is possible to prevent the remaining capacity of the output battery from becoming zero during work and the swing work machine 1 from stopping.

Further, if the remaining capacity of the battery 90a selected as the output battery falls below the first threshold value, and there is no battery 90a whose remaining capacity is equal to or greater than the first threshold value among the other batteries 90a, the control device 120 Then, the notification device 124 is made to issue a notification urging charging. According to the above configuration, the plurality of batteries 90a can be charged at appropriate timing, and work can be performed efficiently.

Furthermore, when the remaining capacity of the battery 90a selected as the output battery falls below a second threshold value that is smaller than the first threshold value, the control device 120 causes the notification device 124 to issue a warning notification that the remaining capacity is exhausted. According to the above configuration, the worker can recognize from the warning that the remaining capacity of the battery 90a is exhausted, so it is difficult to continue the work and it is necessary to take prompt action.

Further, the notification device 124 is any one or more of a display device 124a, an audio output device 124b, and a light emitting device 124c. According to the above configuration, the operator can visually or audibly recognize the remaining capacity of the battery 90a relatively easily and immediately.
When the remaining capacity of the battery 90a selected as the output battery falls below the first threshold value, and there is a battery 90a among the other batteries 90a whose remaining capacity is equal to or greater than the first threshold value, the control device 120 The output battery is switched to one of the batteries 90a whose remaining capacity is equal to or greater than the first threshold value. According to the above configuration, the output battery can be switched to the battery 90a with sufficient remaining capacity before the remaining capacity of the output battery becomes zero without any operation by the operator. As a result, it is possible to extend the driving time of the swing working machine 1 and provide convenience.

In addition, the control device 120 controls the battery 90a selected as the output battery to have insufficient remaining capacity to stop supplying power to the electric motor 91, and to stop supplying power to the electric motor 91 among the other batteries 90a. If there is a battery 90a that has a remaining capacity that allows power to be supplied to the electric motor 91, the output battery is switched to one of the batteries 90a that has a remaining capacity that can supply power to the electric motor 91. According to the above configuration, when the output battery stops supplying power to the electric motor 91, the other battery 90a can supply electric power to the electric motor 91 without any operation by the operator. As a result, it is possible to extend the driving time of the swing working machine 1 and provide convenience.

The controller 120 also includes a drive limiting device 47 that prohibits or limits the driving of the working device 20, and the control device 120 performs the process of switching the output battery after the driving of the working device 20 is prohibited or restricted by the driving limiting device 47. According to the above configuration, it is possible to avoid interruption of the supply of power from the battery 90a while the working device 20 is being driven.
Further, the drive restriction device 47 prohibits or limits the drive of the hydraulic equipment M by cutting off the supply of hydraulic oil from the hydraulic pump P to the hydraulic equipment M. According to the above configuration, it is possible to reliably prevent the hydraulic equipment M from operating when switching the output battery.

Further, the drive restriction device 47 prohibits or restricts the driving of the hydraulic equipment M by restricting the operation of the operating member for the operator to operate the hydraulic equipment M. According to the above configuration, it is possible to reliably prevent the hydraulic equipment M from operating when switching the output battery due to the operator accidentally touching the operating member or inadvertently operating the operating member.
It also includes an inverter 92b that is provided in the power supply path 132 and adjusts the power output to the electric motor 91, and the control device 120 connects the battery 90a selected as the output battery and the inverter 92b in the second process. do. According to the above configuration, since the connection and disconnection with the battery 90a is performed upstream of the inverter 92b that adjusts the power output to the electric motor 91, the connection between the battery 90a and the electric motor 91 can be switched more reliably. be able to.

It includes a swivel base 2 on which a battery unit 90, an electric motor 91, and a working device 20 are mounted, and a swivel device (swivel motor) MT that rotates the swivel base 2. It is possible to realize a swing working machine 1 such as a backhoe that achieves the excellent effects described above.
The swing work machine 1 also includes a swing base 2, a protection mechanism 80 provided on the swing base 2 to protect the driver's seat 8, a work device 20 provided on the swing base 2, a battery unit 90, and a battery unit. A hydraulic system circuit having an electric motor 91 driven by electric power outputted by the electric motor 90, a hydraulic pump P discharging hydraulic oil by driving the electric motor 91, and a hydraulic device M driven by the hydraulic oil discharged by the hydraulic pump P. and a heating device 130 that heats the inside of the protection mechanism 80 using the heat of the hydraulic oil. According to the above configuration, since the heating device 130 heats the inside of the protection mechanism 80 using the heat of the hydraulic oil, the power of the battery unit 90 is not consumed, and energy saving can be achieved.

Further, the hydraulic circuit has an oil passage 40 through which hydraulic oil flows, and the heating device 130 is provided in the oil passage 40 and heats the inside of the protection mechanism 80 by using the heat of the hydraulic oil flowing through the oil passage 40. Perform heating. According to the above configuration, the heating device 130 can acquire the heat of the hydraulic oil via the oil path 40. This allows the heating device 130 to easily exchange heat.
The oil passage 40 also includes a first pipe line 41 through which hydraulic oil discharged by the hydraulic pump P flows toward the hydraulic equipment M, and a second pipe passage 42 through which hydraulic oil discharged from the hydraulic equipment M flows. The heating device 130 is provided in either the first pipe line 41 or the second pipe line 42 in the hydraulic circuit. According to the above configuration, since the heating device 130 is provided in a portion of the oil path 40 through which hydraulic oil having a relatively high temperature flows, the heating device 130 can efficiently exchange heat.

Further, the hydraulic system circuit includes an oil cooler 30 that is connected to the second pipe line 42 and that drives an oil cooler fan 30a to cool the hydraulic oil flowing through the second pipe line 42. It includes a third pipe line 44 that connects the oil cooler 30 and the hydraulic pump P and allows hydraulic oil to flow from the oil cooler 30 to the hydraulic pump P. According to the above configuration, the heating device 130 is provided in the first conduit 41 that is separate from the third conduit 44 in which the oil cooler 30 is provided, and at least the heating device 130 is provided with the oil discharged from the hydraulic pump P. Since heat exchange is performed with the cooled hydraulic oil discharged from the oil cooler 30 or the hydraulic oil discharged from the hydraulic equipment M, heat exchange is not performed with the cooled hydraulic oil discharged from the oil cooler 30. Therefore, heat exchange between the heating device 130 and the relatively low temperature hydraulic oil can be suppressed.

The swing work machine 1 also includes a control device 120 that controls the drive of the oil cooler fan 30a, and an oil temperature detection section 127 that detects the temperature of the hydraulic oil. When the detected oil temperature is less than a predetermined value, driving of the oil cooler fan 30a is stopped. According to the above configuration, the oil cooler fan 30a stops driving when the temperature of the hydraulic oil is less than a predetermined value, that is, when the temperature is relatively low, thereby preventing the oil cooler 30 from interfering with warm-up. It can be heated quickly. Therefore, the heating device 130 can quickly perform heating using the heated hydraulic oil.

The heating device 130 also includes a blower fan 130b that is provided around the first pipe line 41 or the second pipe line 42 and blows air toward the inside of the protection mechanism 80. According to the above configuration, the blowing fan 130b can send the surrounding air warmed by the hydraulic oil flowing inside the first pipe line 41 or the second pipe line 42 into the protection mechanism 80. Thereby, the heating device 130 can heat the inside of the protection mechanism 80 with a simple configuration.

Furthermore, at least one of the first conduit 41 and the second conduit 42 is arranged in the protection mechanism 80 . According to the above configuration, at least one of the first pipe line 41 and the second pipe line 42 in which the temperature of the flowing hydraulic oil is relatively high among the oil passages 40 is arranged in the protection mechanism 80, so that heat exchange is possible. The warm air thus generated can warm the inside of the protection mechanism 80 while maintaining the temperature.
The work machine 1 also includes a battery unit 90, an electric motor 91 driven by the electric power output from the battery unit 90, and an inverter connected to the battery unit 90 and the electric motor 91 to adjust the electric power output to the electric motor 91. 92b, a hydraulic pump P driven by the electric motor 91 to discharge hydraulic oil, a hydraulic equipment M driven by the hydraulic oil discharged by the hydraulic pump P, and a hydraulic oil outputted from the hydraulic pump P to the hydraulic equipment M. The control valves V1 to V8 to be adjusted, the operating device 5 that operates the hydraulic equipment M by adjusting the pilot oil acting on the control valves V1 to V8 and controlling the control valves V1 to V8, and the motor rotation of the electric motor 91. and a current detection unit (BMU 123) that detects the current value output from the battery unit 90 or the inverter 92b. In the case of Set the rotation speed to a predetermined idling speed. According to the above configuration, by detecting the current value output from the battery unit 90 or the inverter 92b, the load on the electric motor 91, that is, the driving state of the hydraulic pump P and the hydraulic equipment M can be detected. Thereby, when the hydraulic equipment M is stopped or does not require a large amount of hydraulic oil, the motor rotation speed can be temporarily lowered. Therefore, with a relatively simple configuration of detecting the current of the power output from the battery unit 90 or the inverter 92b, the motor rotation speed can be automatically changed, and energy saving of the electric motor 91 can be realized.

Furthermore, when the current value detected by the BMU 123 is less than a predetermined value, the control device 120 controls the current value to change according to the operation of the operating device 5 for a predetermined period of time after the current value becomes less than the predetermined value. The motor rotation speed of the electric motor 91 is set, and after a predetermined time has elapsed, the motor rotation speed of the electric motor 91 is set to a predetermined idling rotation speed. According to the above configuration, when the current value detected by the BMU 123 is less than a predetermined value, that is, when the hydraulic equipment M is stopped or does not require a large amount of hydraulic oil, the motor rotation speed of the electric motor 91 can be maintained for a predetermined time. Therefore, the responsiveness of the hydraulic equipment M can be improved.

The work equipment 1 also performs a rotation speed operation that sets a range of the motor rotation speed of the electric motor 91 when the motor rotation speed of the electric motor 91 is set in accordance with a current value that changes according to the operation of the operating device 5. If the current value detected by the BMU 123 is equal to or higher than a predetermined value, the control device 120 controls the motor rotation speed of the electric motor 91 within the range according to the current value that changes according to the operation of the operating device 5. The idling rotation speed is set to a rotation speed lower than the lower limit of the range of motor rotation speeds that can be set using the rotation speed operating tool 5c. According to the above configuration, when the hydraulic equipment M is driven and the load on the electric motor 91 is increasing, the electric motor 91 is driven at the motor rotation speed arbitrarily set by the rotation speed operating tool 5c, and the hydraulic equipment M is driven. When M is stopped or does not require a large amount of hydraulic oil, the rotation speed can be set to a lower value than the motor rotation speed range set by the rotation speed operating tool 5c without any special operation. Therefore, the idling speed can be easily set without increasing the operational burden on the operator.

Further, when the current value detected by the BMU 123 is less than a predetermined value, the control device 120 sets the motor rotation speed of the electric motor 91 using the rotation speed operating tool 5c for a predetermined time after the current value becomes less than the predetermined value. The motor rotation speed of the electric motor 91 is set to the lower limit value in the specified range, and after a predetermined period of time has elapsed, the motor rotation speed of the electric motor 91 is set to the idling rotation speed. According to the above configuration, when the hydraulic equipment M is driven and the load on the electric motor 91 is increasing, the electric motor 91 is driven at the motor rotation speed arbitrarily set by the rotation speed operating tool 5c, and the hydraulic equipment M is driven. When M is stopped or does not require a large amount of hydraulic oil, the control device 120 first sets the motor rotation speed to the lower limit value of the range set by the rotation speed operating tool 5c, and after a predetermined period of time has elapsed, the control device 120 sets the motor rotation speed to the lower limit value of the range set by the rotation speed operating tool 5c. Set the idle speed lower than that. Thereby, further energy saving of the electric motor 91 can be realized by decreasing the motor rotation speed in stages.

Further, the current detection section is provided in the battery unit 90. According to the above configuration, energy saving of the electric motor 91 can be realized at lower cost.
Further, the work machine 1 includes a swivel base 2 and a work device 20 mounted on the swivel base 2 and operated by a hydraulic device M. According to the above configuration, it is possible to realize a working machine (swivel working machine) 1 such as a backhoe that achieves the excellent effects described above.

Although the present invention has been described above, the embodiments disclosed this time should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than the above description, and it is intended that all changes within the meaning and range equivalent to the claims are included.
In the above-described embodiment, an example in which the present invention is applied to a turning work machine such as a backhoe has been described, but the present invention is not limited to this, and can be applied to, for example, a wheel loader, a compact track loader, a skid steer loader, etc. The present invention may be applied to other construction machinery, or may be applied to agricultural machinery such as tractors, combines, rice transplanters, lawn mowers, etc.

1 Swing work machine 2 Swivel base 8 Driver's seat 20 Work device 30 Oil cooler 30a Oil cooler fan 40 Oil passage 41 First pipe line (first discharge oil line)
42 Second pipe line 44 Third pipe line 80 Protection mechanism 90 Battery unit 91 Electric motor 120 Control device 127 Oil temperature detection section 130 Heating device 130b Blow fan M Hydraulic equipment P Hydraulic pump

Claims (5)

A swivel table and
a protection mechanism provided on the swivel base to protect a driver's seat;
a working device provided on the swivel base;
battery unit and
an electric motor driven by electric power output from the battery unit;
a hydraulic circuit having a hydraulic pump that discharges hydraulic oil by driving the electric motor, and a hydraulic device that is driven by the hydraulic oil discharged by the hydraulic pump;
a heating device that heats the inside of the protection mechanism using the heat of the hydraulic oil;
a heat exchange section provided around the first conduit or the second conduit and having a plurality of fins through which the hydraulic oil flows, and blowing air around the fins toward the inside of the protection mechanism. a second heating device having a blower fan ;
The hydraulic system circuit is
a first pipe line through which hydraulic oil discharged by the hydraulic pump flows toward the hydraulic equipment;
a second pipe line through which hydraulic oil discharged from the hydraulic equipment flows;
The heating device is
an operating valve disposed at a first connection portion provided in at least one of the first pipe line or the second pipe line;
One end portion is connected to the operating valve, and the other end portion is provided downstream of the first connecting portion in at least one of the first pipe line and the second pipe line in the flow direction of the hydraulic oil. a bypass pipe connected to the second connection part and having a middle part arranged inside the protection mechanism,
The operating valve is a non-operating valve that regulates hydraulic oil flowing from the first connecting part to the bypass pipe, and allows hydraulic oil to flow from the first connecting part to the second connecting part without going through the bypass pipe. a heating position, and a heating position that allows hydraulic oil to flow from the first connection part to the bypass pipe line and restricts hydraulic oil to flow from the first connection part to the second connection part without going through the bypass pipe line; A swing work machine that can be switched to and. The hydraulic system circuit is
an oil cooler that is connected to the second pipe and drives an oil cooler fan to cool the hydraulic oil flowing through the second pipe;
The swing working machine according to claim 1, further comprising a third conduit that connects the oil cooler and the hydraulic pump and allows hydraulic oil to flow from the oil cooler to the hydraulic pump. a control device that controls driving of the oil cooler fan;
an oil temperature detection section that detects the temperature of hydraulic oil;
Equipped with
The swing working machine according to claim 2, wherein the control device stops driving the oil cooler fan when the oil temperature detected by the oil temperature detection section is less than a predetermined value. The swing working machine according to any one of claims 1 to 3, wherein the heating device is provided in the first conduit, and the second heating device is provided in the second conduit. The turning operation according to claim 4 , wherein an oil cooler for cooling the hydraulic oil flowing through the second pipe is provided downstream of the second heating device in the flow direction of the hydraulic oil in the second pipe. Machine.

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