JP7098938B2 - Loadable truck crane - Google Patents

Description

The present invention relates to the structure of a loaded truck crane mounted on a truck vehicle.

The load-type truck crane mounted on the truck is mounted in the gap between the cabin of the truck and the loading platform. Loadable truck cranes include outrigger and jack devices, swivel platforms, boom devices, winch devices, etc., which are driven via hydraulic actuators. Since the load-type truck crane is arranged in the above-mentioned gap, the outrigger, the jack device, the swivel, and the like are fixed to the frame of the truck vehicle in a compact layout. Therefore, in the case of a loaded truck crane, the oil tank and the operation valve are also efficiently arranged in the above gap (see, for example, Patent Documents 1 and 2).

Square root extraction No. 03-25490 Japanese Unexamined Patent Publication No. 2013-75761

In a conventional loaded truck crane, the oil tank is arranged adjacent to the outrigger in the overhanging direction of the outrigger, that is, on the rear end surface of the outrigger box. Therefore, there is a problem that the stroke of the outrigger beam is reduced by the space required for arranging the oil tank, and as a result, the overhang length of the outrigger beam is suppressed and the working range is limited.

In order to solve this problem, for example, it is conceivable to design and relocate the oil tank in a deformed shape according to the dead space formed in the gap. However, the oil tank becomes special, and as a result, a new problem arises that the manufacturing cost of the loaded truck crane is increased and the maintainability is lowered.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a loaded truck crane capable of ensuring a long stroke of an outrigger beam without a decrease in maintainability and an increase in cost. Is.

(1) The load-type truck crane according to the present invention is mounted on a truck vehicle. The load-type truck crane according to the present invention is provided in an outer box having a pair of outrigger boxes fixed to the frame of the truck vehicle, an outrigger beam slidably inserted in each of the outrigger boxes, and the outrigger beam. An outrigger device having a jack, a support base fixed to the center of the upper surface of the outer box, a swivel base provided on the support base, and a swivel base interposed between the swivel base and the support base. A swivel device having a swivel motor for swiveling, a boom device supported by the swivel table, an outrigger device, a swivel device, an operation valve for supplying hydraulic oil to the boom device, and a drain port on the lower surface are provided. Equipped with an oil tank. The swivel motor and the operation valve are arranged on either the right side or the left side of the support base. The oil tank is either on the right side or the left side of the support base in a state where the drain port intersects the upper surface of the outer box with respect to the longitudinal direction of the outer box in a plan view so as not to face the upper surface. It is located on the other side.

According to the above configuration, the oil tank is arranged on the upper surface of the outer box. That is, the oil tank is not arranged adjacent to the outrigger device in the overhanging direction of the outrigger device. As a result, the stroke of the outrigger beam can be maintained large. As a result, a long stroke of the outrigger beam can be secured.

Further, according to the above configuration, the swivel motor and the operation valve arranged on the upper surface of the outer box as in the oil tank are arranged on the side opposite to the oil tank with respect to the support base. Therefore, sufficient space for arranging the oil tank can be secured. As a result, since it is not necessary to make the oil tank into a special shape, it is possible to avoid a decrease in maintainability and an increase in cost.

If the drain port is arranged directly above the upper surface of the outer box, there arises a problem that the hydraulic oil discharged from the drain port cannot be received. According to the above configuration, the oil tank is arranged at a position where the drain port does not face the upper surface of the outer box. Therefore, the above problems can be avoided.

(2) The swivel device has a swivel joint that supplies hydraulic oil to the boom device. The swivel joint and the operation valve are connected by a hydraulic pipe. An insertion port through which the hydraulic pipe is inserted is formed on the front surface of the support base.

If the insertion port is formed on the surface of the support base facing either the left or right side (the surface facing the oil tank), that is, the surface opposite to the operation valve, the hydraulic pipe becomes too long and it takes time to pipe. .. On the other hand, if the insertion port is formed on the surface facing either the left or right side of the support base, that is, the surface on the same side as the operation valve, the insertion port and the operation valve become too close to each other, and the hydraulic pipe is used for piping. Piping becomes difficult when it is necessary to bend. In the above configuration, the insertion port is formed on the front surface of the support base. The front surface of the support base is located between the surface facing either the left or right side of the support base and the surface facing the other. As a result, the hydraulic pipe can be made to have an appropriate length, so that the piping is not troublesome. Further, as a result, the distance between the insertion port and the operation valve can be set to an appropriate distance, so that the piping for bending the hydraulic pipe can be easily performed.

According to the present invention, it is possible to secure the overhang length of the outrigger and arrange the tank without enlarging the load-type truck crane.

FIG. 1 is a side view of a truck vehicle 20 and a crane device 10. FIG. 2 is an external perspective view of the crane device 10. FIG. 3 is a plan view of the crane device 10 in a state where the boom device 30, the swivel motor 43, and the oil tank 49 are removed. FIG. 4 is a plan view of the crane device 10. FIG. 5 is a functional block diagram of the crane device 10.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings as appropriate. Needless to say, the present embodiment is only one aspect of the present invention, and the embodiments may be changed without changing the gist of the present invention. Further, in the following description, the right direction and the left direction are defined when the truck vehicle 20 is viewed from the rear.

In the present embodiment, the truck vehicle 20 shown in FIG. 1 and the crane device 10 mounted on the truck vehicle 20 (an example of the “loading truck crane” described in the claims) will be described.

[Truck vehicle 20]

As shown in FIG. 1, the truck vehicle 20 includes an engine 21 (see FIG. 5), tires 22 provided on an axle, a cabin 23, and a loading platform 24. The tire 22 is driven by the engine 21 via the axle. The cabin 23 is located at the front of the truck vehicle 20. Driving devices such as a steering wheel, a clutch, an accelerator, and a brake are provided in the cabin 23. The loading platform 24 is arranged behind the cabin 23. The loading platform 24 has a box shape with an open upper part. The luggage is loaded on the loading platform 24 from above by the boom device 30.

[Crane device 10]

As shown in FIG. 1, the crane device 10 is mounted on the truck vehicle 20. The crane device 10 is arranged between the cabin 23 and the loading platform 24. As shown in FIGS. 1 and 2, the crane device 10 includes an outrigger device 36, a support base 31, a swivel base 32, a swivel device 70, a boom device 30, an oil tank 49, and a hydraulic pump 41 (FIG. 1 and FIG. 2). 5), an operation valve 42, and a lever device 50.

[Outrigger device 36]

As shown in FIG. 1, the outrigger device 36 is fixed to the frame 25 of the truck vehicle 20. As shown in FIG. 2, the outrigger device 36 includes an outer box 51, an outrigger beam 52, and a jack 53.

As shown in FIGS. 2 and 3, the outer box 51 includes a pair of outrigger boxes 51A and 51B. The pair of outrigger boxes 51A and 51B are arranged side by side in the front-rear direction 8. The outrigger box 51A is arranged in front of the outrigger box 51B. An opening 54 is formed at the left end of the outrigger box 51A and the right end of the outrigger box 51B.

Since the configurations of the pair of outrigger boxes 51A and 51B are the same, the configuration of the outrigger box 51A will be described below, and the configuration of the outrigger box 51B will be omitted in principle and described as necessary.

The outrigger box 51A can store the outrigger beam 52 inside. The outrigger beam 52 is shown by a broken line in FIG.

The outrigger beam 52 is relatively slidable with respect to the outrigger box 51A. The outrigger beam 52 moves to the left from the storage position shown by the broken line in FIG. 2 to the overhanging position (not shown) protruding to the left from the outrigger box 51A. Further, the outrigger beam 52 moves to the right from the overhanging position to the storage position. The outrigger beam 52 stored in the outrigger box 51B also moves in the same manner as the outrigger beam 52 stored in the outrigger box 51A, except that the outrigger direction is opposite. The outrigger beam 52 may be manually moved by an operator, or may be moved by being driven by a cylinder or the like.

As shown in FIG. 2, the jack 53 includes a jack main body 53A, a jack arm (not shown), and a jack float 53B. The jack body 53A extends downward from the left end of the outrigger beam 52. The jack body 53A is integrally configured with the outrigger beam 52. The jack arm can be expanded and contracted with respect to the jack body 53A. FIG. 2 shows a state in which the jack arm is retracted with respect to the jack main body 53A by being stored inside the jack main body 53A. The right jack arm (jack arm corresponding to the outrigger box 51B) is driven by the jack cylinder 47 (see FIG. 5), and the left jack arm (jack arm corresponding to the outrigger box 51A) is the jack cylinder 48 (FIG. 5). See). The jack float 53B is attached to the lower end of the jack arm. The jack float 53B touches the ground while the jack arm extends downward with respect to the jack body 53A.

The outrigger device 36 changes its state between a grounded state and a retracted state. The outrigger device 36 is in the retracted state during traveling and is in the grounded state when the boom device 30 is operated. The ground contact state is a state in which the outrigger beam 52 is in the overhanging position and the jack arm extends downward from the jack main body 53A. The retracted state is a state in which the outrigger beam 52 is in the retracted position and the jack arm is retracted in the jack main body 53A.

[Support stand 31]

As shown in FIG. 2, the support base 31 is fixed to the central portion in the left-right direction 9 on the upper surface 51C of the outer box 51. The support base 31 projects upward from the upper surface 51C. As shown in FIG. 3, a through hole 39 (an example of the “insertion port” described in the claims) is formed in the front surface 31A of the support base 31.

[Swivel stand 32]

As shown in FIG. 2, the swivel base 32 is supported by the support base 31 so as to be swivelable around a rotation shaft 37 along the vertical direction 7. The center of the swivel table 32 and the center of the swivel shaft 37 coincide with each other. The swivel table 32 is swiveled by the swivel motor 43.

[Swivel device 70]

As shown in FIGS. 2 and 3, the swivel device 70 includes a swivel joint 71 (see FIG. 3) and a swivel motor 43 (see FIG. 2).

The swivel joint 71 is arranged inside the swivel table 32 in a state of being fixed to the swivel table 32. The swivel joint 71 is interposed between the support base 31 and the swivel base 32.

The swivel motor 43 is arranged above the rear portion of the outer box 51 (outrigger box 51B). As shown in FIGS. 2 and 4, the swivel motor 43 is arranged on the right side of the support base 31. The swivel motor 43 is supported by a convex plate 29 (see FIG. 3) protruding to the right from the support base 31. The swivel motor 43 is fixed to the convex plate 29 by a screw or the like.

[Boom device 30]

As shown in FIG. 1, the boom device 30 includes a post 33, a boom 34, and a hook 35.

As shown in FIG. 2, the post 33 extends upward from the swivel table 32. The lower end of the post 33 is fixed to the swivel table 32, and the post 33 swivels together with the swivel table 32. The boom 34 is supported by the upper end portion 33A of the post 33 via an undulating center pin (not shown) so as to be undulating.

The boom 34 shown in FIG. 1 has a telescopic structure and is expanded and contracted via a telescopic cylinder 44 (see FIG. 5). The boom 34 is divided into an inverted state (shown in FIG. 1) and an upright state (not shown) raised from the inverted state by the undulating cylinder 45 (see FIGS. 2 and 5) provided on the post 33. Ups and downs.

The hook 35 is connected to one end of a wire rope (not shown) and is suspended from the tip of the boom 34. The other end of the wire rope is connected to a winch 38 provided on the post 33. The winch 38 is rotated by a winch motor 46 (see FIG. 5). The winch 38 pays out the wire rope, lowers the hook 35, winds up the wire rope, and raises the hook 35.

[Oil tank 49]

The oil tank 49 shown in FIG. 2 stores hydraulic oil. As shown in FIG. 5, the hydraulic oil is supplied to the outrigger device 36, the swivel device 70, and the boom device 30 via the operation valve 42.

As shown in FIGS. 2 and 4, the oil tank 49 has a substantially rectangular cuboid shape. The oil tank 49 is arranged on the upper surface 51C of the outer box 51. The oil tank 49 is arranged on the left side of the support base 31. The oil tank 49 is fixed to the outer box 51 with screws or the like.

As shown in FIG. 3, a drain port 40 is provided at the left rear portion of the lower surface of the oil tank 49. Normally, the drain port 40 is closed by a lid (not shown). By opening the lid, the hydraulic oil stored in the oil tank 49 can be discharged to the outside of the oil tank 49 through the drain port 40. The oil tank 49 is arranged at a position where the drain port 40 and the upper surface 51C of the outer box 51 do not face each other in the vertical direction. Specifically, the oil tank 49 is arranged so as to be oblique to the left-right direction 9 so that the right front portion thereof is located on the front side and the left rear portion thereof is located on the rear side. As a result, the drain port 40 is located behind the upper surface 51C of the outer box 51. That is, the drain port 40 is located at a position not vertically facing the upper surface 51C of the outer box 51.

[Hydraulic pump 41]

The hydraulic pump 41 shown in FIG. 5 is driven by the engine 21 to deliver the hydraulic oil stored in the oil tank 49 to the operation valve 42. Although not shown, the hydraulic pump 41 is located below the support 31.

As shown in FIG. 5, a swivel motor 43 that swivels the swivel table 32, a telescopic cylinder 44 that expands and contracts the boom 34, an undulating cylinder 45 that undulates the boom 34, a winch motor 46 that rotates the winch 38, and an out trigger device. The jack cylinders 47 and 48 that operate 36 are driven by hydraulic oil supplied from the hydraulic pump 41.

[Operation valve 42]

The operation valve 42 shown in FIG. 5 adjusts the direction and flow rate of the hydraulic oil delivered from the oil tank 49 by the hydraulic pump 41.

As shown in FIGS. 2 and 4, the operation valve 42 is arranged on the upper surface 51C of the outer box 51. The operation valve 42 is arranged on the right side of the support base 31. The operation valve 42 is arranged in front of the swivel motor 43. The operation valve 42 is fixed to the outer box 51 with screws or the like.

A flow path (not shown) is formed inside the operation valve 42. The flow path forms a passage for the hydraulic oil. The flow path is connected to the outside through a plurality of ports. One end of the hose is connected to each port. The other end of the hose is connected to each of the hydraulic actuators (swivel motor 43, telescopic cylinder 44, undulating cylinder 45, winch motor 46, and jack cylinders 47, 48, respectively), the hydraulic pump 41, and the oil tank 49. There is.

As shown in FIG. 3, the operation valve 42 and the swivel joint 71 are connected by a plurality of hoses 87 (an example of the “hydraulic pipe” described in the claims). The plurality of hoses 87 extend to the left from the port 91 formed on the left surface of the operation valve 42 toward the through hole 39 of the support base 31. The plurality of hoses 87 are connected to the swivel joint 71 arranged inside the support base 31 through the through hole 39. The hydraulic oil circulated from the plurality of hoses 87 to the swivel joint 71 is supplied to the swivel motor 43 and the boom device 30 (expandable cylinder 44, undulating cylinder 45, and winch motor 46, respectively).

As shown in FIG. 2, the operation valve 42 and the oil tank 49 are connected by a hose (not shown). The hose is connected to the oil tank 49 from a port (not shown) formed on the left side of the operation valve 42 through the rear of the support base 31.

Although the description is omitted, the operation valve 42 and the jack cylinders 47 and 48, and the operation valve 42 and the hydraulic pump 41 are also connected by hoses (not shown).

The connection between each port and each hydraulic actuator, hydraulic pump 41, and oil tank 49 is not limited to a hose, and may be piped by, for example, a steel pipe.

The hydraulic oil delivered from the oil tank 49 by the hydraulic pump 41 flows to the flow path. The hydraulic oil in the flow path is sent from the operation valve 42 to the corresponding hydraulic actuator. The hydraulic oil delivered to the hydraulic actuator returns from the hydraulic actuator to the operation valve 42. The hydraulic oil returned to the operation valve 42 is returned to the oil tank 49.

A plurality of spools 85 (see FIG. 5) are arranged in the flow path. Each spool 85 corresponds to each hydraulic actuator. By sliding each spool 85 in the flow path, the opening and closing of each port is switched. By switching the opening and closing of each port, the direction of the hydraulic oil (either the direction from the flow path to the corresponding hydraulic actuator or the direction from the corresponding hydraulic actuator to the flow path) and the flow rate are switched. The spool 85 is opened and the hydraulic oil is supplied to the corresponding hydraulic actuator to drive the corresponding hydraulic actuator. A part of each spool 85 is exposed to the outside of the operation valve 42.

[Lever device 50]

As shown in FIG. 3, the lever device 50 is arranged in front of the outrigger device 36. The lever device 50 includes levers 61 and 62 arranged at both left and right ends of the crane device 10 and a rod 63 connecting the levers 61 and 62. The lever 62 moves in conjunction with the operation of the lever 61, and the lever 61 moves in conjunction with the operation of the lever 62. The levers 61, 62 and the rod 63 are provided corresponding to each of the plurality of spools 85.

Each lever 62 is connected to an externally exposed portion of each spool 85 (see FIG. 5). As a result, the spool 85 slides in the flow path of the operation valve 42 in conjunction with the operation of the levers 61 and 62 by the user, and the hydraulic actuator is driven.

[Action and effect of the embodiment]

According to the present embodiment, the oil tank 49 is arranged on the upper surface 51C of the outer box 51. That is, the oil tank 49 is not arranged adjacent to the outrigger device 36 in the overhanging direction (left-right direction 9) of the outrigger device 36. As a result, the stroke of the outrigger beam 52 can be maintained large. As a result, a long stroke of the outrigger beam 52 can be secured.

Further, according to the present embodiment, the swivel motor 43 and the operation valve 42 arranged on the upper surface 51C of the outer box 51 are arranged on the opposite side of the support base 31 from the oil tank 49 as in the oil tank 49. .. Therefore, sufficient space for arranging the oil tank 49 can be secured. As a result, since it is not necessary to make the oil tank 49 into a special shape, it is possible to avoid a decrease in maintainability and an increase in cost.

Further, if the drain port 40 is arranged directly above the upper surface 51C of the outer box 51, there arises a problem that the hydraulic oil discharged from the drain port 40 cannot be received. According to the present embodiment, the oil tank 49 is arranged at a position where the drain port 40 does not vertically face the upper surface 51C of the outer box 51. Therefore, the above problems can be avoided.

Further, if the through hole 39 is formed on the left surface of the support base 31, the hose 87 becomes too long and it takes time and effort for piping. On the other hand, if the through hole 39 is formed on the right side of the support base 31, the through hole 39 and the operation valve 42 become too close to each other, and the hose 87 needs to be bent for piping. Become. In the present embodiment, as shown in FIGS. 2 and 3, a through hole 39 is formed in the front surface 31A of the support base 31 in order to secure a sufficient space for arranging the oil tank 49. The front surface 31A of the support base 31 is located between the right side surface and the left side surface of the support base 31. As a result, the hose 87 can be made to have an appropriate length, so that the piping is not troublesome. Further, as a result, the distance between the through hole 39 and the operation valve 42 can be set to an appropriate distance, so that the piping for bending the hose 87 can be easily performed.

[Modification example]

In the above embodiment, the swivel motor 43 and the operation valve 42 are arranged on the right side of the support base 31, and the oil tank 49 is arranged on the left side of the support base 31 (see FIG. 4). However, contrary to the above embodiment, the swivel motor 43 and the operation valve 42 may be arranged on the left side of the support base 31, and the oil tank 49 may be arranged on the right side of the support base 31.

In the above embodiment, the operation valve 42 is arranged in front of the swivel motor 43 (see FIG. 4). However, contrary to the above embodiment, the swivel motor 43 may be arranged in front of the operation valve 42.

In the above embodiment, the shape of the oil tank 49 is generally a rectangular cuboid shape (see FIG. 2). However, the shape of the oil tank 49 is not limited to the shape shown in FIG. 2 and the like. For example, the oil tank 49 may have a cylindrical shape, or may have a shape provided with a recess or the like for avoiding a member or a hose arranged around the oil tank 49.

In the above embodiment, the oil tank 49 is arranged so as to be oblique to the left-right direction 9 so that the right front portion thereof is located on the front side and the left rear portion thereof is located on the rear side (FIG. 3). And see FIG. 4). However, the oil tank 49 may be arranged in a posture other than the postures shown in FIGS. 3 and 4, provided that the drain port 40 is not vertically opposed to the upper surface 51C of the outer box 51. For example, when the drain port 40 is formed at the lower end of the rear surface of the oil tank 49, the oil tank 49 may be arranged straight along the left-right direction 9.

In the above embodiment, the through hole 39 is formed on the front surface of the support base 31 (see FIG. 3). However, the position where the through hole 39 is formed is not limited to the front surface of the support base 31, and may be, for example, the right surface or the rear surface of the support base 31.

7 ... Vertical direction 8 ... Front-back direction 9 ... Left-right direction 10 ... Crane device (loading truck crane)
20 ... Truck vehicle 21 ... Engine 22 ... Tire 23 ... Cabin 24 ... Loading platform 29 ... Convex plate 30 ... Boom device 31 ... Support platform 32 ... Swing platform 33 ... Post 34 ... Boom 35 ... Hook 36 ... Outrigger device 37 ... Rotating shaft 38 ... Winch 39 ... Through hole (insertion port)
40 ... Drain port 41 ... Hydraulic pump 42 ... Operation valve 43 ... Swing motor 44 ... Telescopic cylinder 45 ... Undulating cylinder 46 ... Winch motor 47 ... Jack cylinder 48 ...・ ・ Jack cylinder 50 ・ ・ ・ Lever device 51 ・ ・ ・ Outer box 51A, 51B ・ ・ ・ Out trigger box 52 ・ ・ ・ Out trigger beam 53 ・ ・ ・ Jack 54 ・ ・ ・ Opening 61 ・ ・ ・ Lever 62 ・ ・ ・ Lever 63 ... Rod 70 ... Swivel device 71 ... Swivel joint 85 ... Spool 87 ... Hose (hydraulic pipe)
91 ... Port

Claims (2)

A loaded truck crane mounted on a truck.
An outer box having a pair of outrigger boxes fixed to the frame of the truck vehicle, an outrigger beam slidably inserted in each of the outrigger boxes, and an outrigger device having a jack provided in the outrigger beam.
The support base fixed in the center of the upper surface of the outer box and
The swivel table provided on the support table and
A swivel device having a swivel motor that is interposed between the swivel table and the swivel table and swivels the swivel table, and a swivel device.
The boom device supported by the swivel table and
It is provided with an outrigger device, a swivel device, an operation valve for supplying hydraulic oil to the boom device, and an oil tank provided with a drain port on the lower surface .
The swivel motor and the operation valve are arranged on either the right side or the left side of the support base.
The oil tank is either on the right side or the left side of the support base in a state where the drain port intersects the upper surface of the outer box with respect to the longitudinal direction of the outer box in a plan view so as not to face the upper surface. A loaded truck crane located on the other side. The swivel device has a swivel joint that supplies hydraulic oil to the boom device.
The swivel joint and the above operation valve are connected by a hydraulic pipe.
The load-type truck crane according to claim 1 , wherein an insertion port through which the hydraulic pipe is inserted is formed on the front surface of the support base.

Images