JP7613445B2 - Work Machine - Google Patents

Description

The present invention relates to a work machine equipped with an exhaust gas aftertreatment device that treats engine exhaust gas.

Patent document 1 discloses a drive unit for a construction machine that is equipped with a stand that supports an exhaust gas treatment device (exhaust gas aftertreatment device) above the engine.

JP 2021-24565 A

In a crane, an arrangement space is provided to the side of the center of the rotating frame of the upper rotating body and behind the cab, and in this arrangement space, the hydraulic oil tank, exhaust gas aftertreatment device, and engine are arranged in that order in the fore-and-aft direction of the upper rotating body. In recent years, exhaust gas regulations have become stricter, and there is a trend for exhaust gas aftertreatment devices to become larger. However, in the case of a crane, from the standpoint of marketability, the overall length of the upper rotating body cannot be increased. Also, from the standpoint of transportability, the width of the upper rotating body cannot be increased. Therefore, larger exhaust gas aftertreatment devices must be accommodated in a limited space.

The object of the present invention is to provide a work machine capable of housing an exhaust gas aftertreatment device in a limited space.

The present invention is characterized in that it comprises a machine body, an engine, a hydraulic oil tank for storing hydraulic oil, and an exhaust gas aftertreatment device for treating exhaust gas from the engine, and in that the hydraulic oil tank, the exhaust gas aftertreatment device, and the engine are arranged in this order in the front-to-rear direction of the machine body in an arrangement space provided inside the machine body, and when the directions perpendicular to the front-to-rear direction and the up-to-down direction are defined as width directions, the exhaust gas aftertreatment device is arranged so as to fit within the width of the hydraulic oil tank in the width direction, and the longitudinal direction of the exhaust gas aftertreatment device is arranged at an angle to the front-to-rear direction.

According to the present invention, the exhaust gas aftertreatment device is arranged so as to fit within the width of the hydraulic oil tank in the width direction, and the longitudinal direction of the exhaust gas aftertreatment device is arranged diagonally with respect to the front-rear direction of the machine body. By arranging the longitudinal direction of the exhaust gas aftertreatment device diagonally with respect to the front-rear direction of the machine body, the length of the arrangement space in the front-rear direction of the machine body can be shortened compared to the case where the longitudinal direction of the exhaust gas aftertreatment device is arranged in the front-rear direction of the machine body. In addition, the diagonally arranged exhaust gas aftertreatment device fits within the width of the hydraulic oil tank. Therefore, the width of the arrangement space in the width direction can be limited to the width of the hydraulic oil tank. This makes it possible to accommodate the exhaust gas aftertreatment device in a limited space.

FIG. FIG. FIG. FIG. 1 is a side view of the arrangement space. FIG. 2 is a perspective view of a covering member and a supporting member. FIG. 2 is a side view of the exhaust gas aftertreatment device. FIG. 7 is a view of FIG. 6 as seen from direction A. 8 is a view of the exhaust gas aftertreatment device as viewed in the direction B of FIG. 7 .

The following describes a preferred embodiment of the present invention with reference to the drawings.

(Crane configuration)
A work machine in an embodiment of the present invention is equipped with an exhaust gas aftertreatment device. The exhaust gas aftertreatment device treats exhaust gas from an engine. In this embodiment, the work machine is a crane. As shown in FIG. 1, which is a side view of a crane 1, the crane 1 is configured such that an upper rotating body 32 is rotatably mounted on a crawler-type lower traveling body 31. Note that the crane 1 may be a mobile crane that uses moving means other than crawlers (for example, wheels), or may be a fixed crane that does not have moving means. In addition, the work machine is not limited to the crane 1.

The upper rotating body (machine body) 32 has a rotating frame 33, a boom 34, a gantry 36, a lower spreader 38, a hook winch (not shown), a boom raising and lowering winch (not shown), and a counterweight 39. A cab (operator's compartment) 35 is provided at the front of the upper rotating body 32.

The swivel frame 33 is attached to the lower carrier 31 via a swivel bearing (not shown). The boom 34 is connected to the front of the swivel frame 33 so that it can be raised and lowered relative to the swivel frame 33. One end of a boom guy line 49 is connected to the tip of the boom 34.

A point sheave 41 is provided at the tip of the boom 34. A hook device 43 is suspended from this point sheave 41 via a hoisting rope 42. Alternatively, a jib may be attached to the tip of the boom 34, and the hook device 43 may be suspended from the point sheave 41 provided at the tip of the jib via the hoisting rope 42.

The gantry 36 is attached to the rear of the revolving frame 33. Note that a mast may be provided instead of the gantry 36. The lower spreader 38 is attached to the upper end of the gantry 36. A boom hoisting rope 51 is hung between the lower spreader 38 and an upper spreader 50 connected to the other end of the boom guy line 49.

The hook winch and the boom hoist winch are each located in the center of the swivel frame 33. The hook winch winds up or pays out the hoisting rope 42 to hoist or lower the hook device 43. The boom hoist winch winds up or pays out the boom hoist rope 51 to raise or lower the boom 34 around the boom foot pin, which serves as its fulcrum.

The counterweight 39 is mounted to the rear of the rotating frame 33.

(Configuration of placement space)
As shown in Fig. 2, which is a side view of the upper rotating body 32, and Fig. 3, which is a top view of the upper rotating body 32, an arrangement space 20 is provided inside the upper rotating body 32. As shown in Fig. 3, the rotating frame 33 of the upper rotating body 32 is composed of a central part 33a in which a hook winch and the like are arranged, and deck parts 33b arranged on the left and right of the central part 33a. The arrangement space 20 is provided in the deck part 33b on the lower side in the figure, and is located to the side of the central part 33a of the rotating frame 33 and behind the cab 35. The arrangement space 20 is a rectangular parallelepiped space that is long in the front-rear direction of the upper rotating body 32. A counterweight 39 is arranged behind the arrangement space 20 (left side in the figure).

As shown in FIG. 2, the crane 1 has an engine 2, a hydraulic oil tank 3, and an exhaust gas aftertreatment device 4. The engine 2 has an intake port on the left side of the figure, and an exhaust port on the right side of the figure. An intake device 14 is connected to the intake port of the engine 2. An exhaust gas aftertreatment device 4 is connected to the exhaust port of the engine 2. A fan 2b is provided on the intake port side of the engine 2. The hydraulic oil tank 3 stores hydraulic oil. The exhaust gas aftertreatment device 4 processes the exhaust gas of the engine 2.

In the arrangement space 20, the hydraulic oil tank 3, exhaust gas aftertreatment device 4, and engine 2 are arranged in this order in the fore-and-aft direction of the upper rotating body 32. A cooler 16 is arranged on the intake side of the engine 2 in the arrangement space 20. The engine cooling water that absorbs heat from the engine 2 is cooled by the cooler 16 and supplied to the engine 2.

As shown in FIG. 3, the directions perpendicular to the front-rear and up-down directions of the upper rotating body 32 are defined as width directions. The width of the hydraulic oil tank 3 is the same as the width of the arrangement space 20. The width of the engine 2 is slightly smaller than the width of the arrangement space 20. The exhaust gas aftertreatment device 4 is arranged so as to fit within the width of the hydraulic oil tank 3 in the width direction. In addition, the longitudinal direction of the exhaust gas aftertreatment device 4 is arranged at an angle to the front-rear direction of the upper rotating body 32.

By arranging the exhaust gas post-treatment device 4 so that its longitudinal direction is oblique to the fore-aft direction of the upper rotating body 32, the length of the arrangement space 20 in the fore-aft direction of the upper rotating body 32 can be shortened compared to when the exhaust gas post-treatment device 4 is arranged so that its longitudinal direction is in the fore-aft direction of the upper rotating body 32. In addition, the exhaust gas post-treatment device 4 arranged obliquely fits within the width of the hydraulic oil tank 3. Therefore, the width of the arrangement space 20 in the width direction can be limited to the width of the hydraulic oil tank 3. This allows the exhaust gas post-treatment device 4 to be accommodated in a limited space.

In addition, a space can be secured behind the engine 2 to place the cooler 16. Therefore, the basic equipment (hydraulic oil tank 3, aftertreatment device 4, engine 2, cooler 16) in the placement space 20 can be placed without making significant changes to the conventional configuration.

As shown in FIG. 2, the crane 1 has a hydraulic pump 5. The hydraulic pump 5 discharges hydraulic oil from the hydraulic oil tank 3 when driven by the engine 2. The hydraulic pump 5 is disposed between the hydraulic oil tank 3 and the engine 2. The exhaust gas aftertreatment device 4 is disposed above the hydraulic pump 5. For example, the exhaust gas aftertreatment device 4 is disposed directly above the hydraulic pump 5.

Normally, the height of the hydraulic pump 5 is lower than the height of the engine 2. Therefore, normally, there is space between the hydraulic oil tank 3 and the engine 2 and above the hydraulic pump 5. By arranging the exhaust gas aftertreatment device 4 in the space above the hydraulic pump 5, the arrangement space 20 can be made more compact than when the hydraulic pump 5 and the exhaust gas aftertreatment device 4 are arranged side by side in the horizontal direction. The horizontal direction includes the front-rear direction and the width direction of the upper rotating body 32.

As shown in FIG. 4, which is a side view of the arrangement space 20, the crane 1 has a covering member 6 and a support member 7. The covering member 6 covers the exhaust gas aftertreatment device 4 and the engine 2. The covering member 6 covers the upper side and both sides of the exhaust gas aftertreatment device 4 and the engine 2. The covering member 6 has beams that extend in the front-to-rear direction of the upper rotating body 32, beams that extend in the width direction, and columns that extend in the up-down direction.

The support member 7 is disposed inside the covering member 6. The support member 7 has a flange 7a at each end in the front-rear direction of the upper rotating body 32. The support member 7 also has a flange 7b (see FIG. 5) on the boom 34 side in the width direction (the rear side of the page). These flanges 7a and 7b are each fixed to the covering member 6.

Fig. 5 shows a perspective view of the covering member 6 and the support member 7. Note that the engine 2, hydraulic oil tank 3, exhaust gas aftertreatment device 4, etc. are not shown in Fig. 5. As shown in Fig. 5, the flange 7a of the support member 7 is placed on the beam 6a of the covering member 6 that extends in the width direction, and this flange 7a is fixed to the beam 6a with bolts or the like. Also, the flange 7b of the support member 7 is placed on the beam 6b of the covering member 6 that extends in the front-rear direction of the upper rotating body 32, and this flange 7b is fixed to the beam 6b with bolts or the like.

The support member 7 does not have a flange on the side of the upper rotating body 32 in the width direction (the front side of the page). Therefore, the inside of the support member 7 is open on the front side of the page in the width direction.

As shown in FIG. 4, the exhaust gas aftertreatment device 4 is supported from below by a support member 7. When the exhaust gas aftertreatment device 4 is supported by a frame as in Patent Document 1, space is required inside the covering member 6 to place the legs of the frame. On the other hand, when the exhaust gas aftertreatment device 4 is supported by the supporting member 7, there is no need to provide space inside the covering member to place members such as the legs of the frame. By supporting the exhaust gas aftertreatment device 4 by the supporting member 7, the exhaust gas aftertreatment device 4 can be supported in a smaller space than when the exhaust gas aftertreatment device 4 is supported by a frame.

As shown in FIG. 4, the support member 7 has a recess 7c. A part of the exhaust gas aftertreatment device 4 is disposed inside this recess 7c. By disposing a part of the exhaust gas aftertreatment device 4 inside the recess 7c of the support member 7, the position of the upper end of the exhaust gas aftertreatment device 4 can be lowered compared to a case where the support member 7 does not have the recess 7c. This makes it possible to reduce the height of the arrangement space 20.

As shown in FIG. 4, the exhaust gas aftertreatment device 4 is supported by a support member 7 below the upper end of the engine 2. By supporting the exhaust gas aftertreatment device 4 below the upper end of the engine 2, the height to the upper end of the exhaust gas aftertreatment device 4 can be reduced compared to when the device is supported at the same height as the upper end of the engine 2 or higher. This allows the height of the installation space 20 to be reduced.

As shown in FIG. 4, the end (flange 7a) of the support member 7 on the engine 2 side overlaps with a portion of the engine 2 in the fore-and-aft direction of the upper rotating body 32 above the top end of the engine 2. By overlapping the end (flange 7a) of the support member 7 on the engine 2 side with a portion of the engine 2 in the fore-and-aft direction of the upper rotating body 32 above the top end of the engine 2, the engine 2 and the exhaust gas aftertreatment device 4 can be brought closer together in the fore-and-aft direction of the upper rotating body 32. This makes it possible to shorten the length of the arrangement space 20 in the fore-and-aft direction of the upper rotating body 32.

As shown in FIG. 5, the bottom of the support member 7 is plate-shaped. A plurality of air holes are formed in the bottom plate of the support member 7. Because the bottom of the support member 7 is plate-shaped, the support member 7 can suppress the transfer of heat from the exhaust gas aftertreatment device 4 to below the exhaust gas aftertreatment device 4, compared to when the bottom of the support member 7 is lattice-shaped or the like. Therefore, the thermal effect on the hydraulic pump 5 located below the exhaust gas aftertreatment device 4 can be suppressed.

As shown in FIG. 4, in a cross-sectional view seen from the width direction, the tank side bottom 7d, which is the bottom of the recess 7c on the hydraulic oil tank 3 side, is positioned higher than the engine side bottom 7e, which is the bottom on the engine 2 side of the tank side bottom 7d. By positioning the tank side bottom 7d higher than the engine side bottom 7e, it is possible to prevent the recess 7c from interfering with the oil filter of the hydraulic oil tank 3, etc. This allows the recess 7c and the hydraulic oil tank 3 to be closer to each other in the fore-and-aft direction of the upper rotating body 32. As a result, it is possible to shorten the length of the arrangement space 20 in the fore-and-aft direction of the upper rotating body 32.

As shown in FIG. 6, which is a side view of the exhaust gas aftertreatment device 4, the exhaust gas aftertreatment device 4 has a first processing device 11 and a second processing device 12. The crane 1 has a connection pipe 8 that connects the exhaust port of the engine 2 to the exhaust gas aftertreatment device 4. The first processing device 11 is connected to the exhaust port of the engine 2 via the connection pipe 8. The second processing device 12 is provided downstream of the first processing device 11 and is connected to the first processing device 11 via a connecting pipe 9 (see FIG. 8).

The first processing unit 11 is equipped with a DOC (Diesel Oxidation Catalyst) that removes PM (Particulate Matter) contained in the exhaust gas. The DOC is a catalyst that oxidizes soluble organic matter (SOF), CO, and HC in the PM contained in the exhaust gas. The second processing unit 12 constitutes a so-called urea SCR (Selective Catalytic Reduction) system. The urea SCR system uses an SCR catalyst to promote an oxidation-reduction reaction between ammonia generated by hydrolysis of urea water at high temperatures and nitrogen oxides (NOx) in the exhaust gas, thereby rendering the nitrogen oxides harmless.

The first processing unit 11 may be equipped with a DPF (Diesel Particulate Filter) instead of a DOC. The DPF has the ability to capture particulate matter such as soot contained in the exhaust gas discharged from the engine 2. The second processing unit 12 may be equipped with a DPD device instead of a urea SCR system. The DPD device captures PM in the exhaust gas with a filter. The DPD device has the function of burning the PM captured in the filter to regenerate the filter.

The second processing section 12 is disposed above the first processing section 11. For example, the second processing section 12 is disposed directly above the first processing section 11. A part of the first processing section 11 is disposed inside the recess 7a of the support member 7. The second processing section 12 is supported from below by a bracket 13 provided on the bottom plate of the support member 7. The longitudinal direction of the second processing section 12 is parallel to the longitudinal direction of the first processing section 11. The longitudinal length of the second processing section 12 is longer than the longitudinal length of the first processing section 11. By disposing the second processing section 12 above the first processing section 11, the arrangement space 20 can be made more compact in the horizontal direction than when the first processing section 11 and the second processing section 12 are disposed side by side in the horizontal direction.

As shown in FIG. 7, which is a view of FIG. 6 from the direction A, the engine 2 has an exhaust port 2a to which the connecting pipe 8 is connected. The exhaust port 2a of the engine 2 is disposed on the outer side in the width direction of the engine 2. The exhaust port 2a of the engine 2 is disposed below the exhaust gas aftertreatment device 4. In FIG. 7, the exhaust port 2a is located to the right of the center of the engine 2. In FIG. 7, the right side of the figure is the boom 34 side (the inner side of the covering member 6), and the left side of the figure is the outer side of the upper rotating body 32 (the outer side of the covering member 6). The longitudinal direction of the exhaust gas aftertreatment device 4 is disposed at an angle to the front-rear direction of the upper rotating body 32 so as to extend toward the exhaust port 2a of the engine 2 toward the engine 2 side.

By arranging the longitudinal direction of the exhaust gas aftertreatment device 4 at an angle toward the exhaust port 2a of the engine 2, the exhaust gas aftertreatment device 4 and the exhaust port 2a of the engine 2 can be brought closer together. This allows the length of the connecting pipe 8 connecting the exhaust port 2a of the engine 2 and the exhaust gas aftertreatment device 4 (first processing unit 11) to be shortened. This makes it possible to suppress a decrease in the temperature of the exhaust gas flowing through the connecting pipe 8.

As shown in FIG. 7, the connecting pipe 8 is arranged at an angle to the vertical direction so that it extends upward toward the inside of the width direction of the engine 2. By arranging the connecting pipe 8 at an angle to the vertical direction, the connection part between the exhaust gas aftertreatment device 4 and the connecting pipe 8 can be arranged at a position on the inside of the width direction of the engine 2, compared to when the connecting pipe 8 is arranged in the vertical direction. This reduces the need to arrange the connecting part in a position that protrudes outward in the width direction of the engine 2. This makes it possible to make the arrangement space 20 more compact.

As shown in FIG. 7, the connecting pipe 8 is disposed inside the engine 2 in the width direction. By locating the connecting pipe 8 inside the engine 2, the connecting pipe 8 is less likely to get in the way when accessing the arrangement space 20 from the outside of the upper rotating body 32 (the left side in the figure). This makes it possible to conveniently perform maintenance of equipment (such as the hydraulic pump 5) in the arrangement space 20.

As shown in FIG. 4, on the hydraulic oil tank 3 side in the fore-and-aft direction of the upper rotating body 32, a part of the second processing section 12 overlaps the end (flange 7a) of the support member 7 in the fore-and-aft direction of the upper rotating body 32. By overlapping a part of the second processing section 12 with the end of the support member 7, the space above the end of the support member 7 can be effectively utilized. In addition, by overlapping a part of the second processing section 12 with the end of the support member 7, a space can be created on the engine 2 side of the second processing section 12 in the fore-and-aft direction of the upper rotating body 32. Therefore, other equipment can be placed in this space. In this embodiment, a fuel filter 10 is placed in the space created on the engine 2 side of the second processing section 12.

As shown in FIG. 8, which is a view of the exhaust gas aftertreatment device 4 from the direction B in FIG. 7, the connecting pipe 8 connecting the exhaust port of the engine 2 and the first treatment device 11 has a straight pipe section 8a. The straight pipe section 8a is connected to the first treatment device 11 in the longitudinal direction of the first treatment device 11. The connecting pipe 9 connecting the first treatment device 11 and the second treatment device 12 has a bent section 9a. The bent section 9a is bent with respect to the longitudinal direction of the first treatment device 11 and connected to the second treatment device 12. The straight pipe section 8a and the bent section 9a overlap in the front-rear direction of the upper rotating body 32.

By overlapping the straight pipe section 8a of the connection pipe 8 and the bent section 9a of the link pipe 9 in the front-to-rear direction of the upper rotating body 32, the space required to arrange the connection pipe 8 and the link pipe 9 can be made compact. This allows the arrangement space 20 to be made compact.

(effect)
As described above, according to the crane 1 of this embodiment, as shown in FIG. 3, the exhaust gas aftertreatment device 4 is arranged so as to be contained within the width of the hydraulic oil tank 3 in the width direction, and the longitudinal direction of the exhaust gas aftertreatment device 4 is arranged diagonally with respect to the front-rear direction of the upper rotating body 32. By arranging the longitudinal direction of the exhaust gas aftertreatment device 4 diagonally with respect to the front-rear direction of the upper rotating body 32, the length of the arrangement space 20 in the front-rear direction of the upper rotating body 32 can be shortened compared to the case where the longitudinal direction of the exhaust gas aftertreatment device 4 is arranged in the front-rear direction of the upper rotating body 32. In addition, the exhaust gas aftertreatment device 4 arranged diagonally is contained within the width of the hydraulic oil tank 3. Therefore, the width of the arrangement space 20 in the width direction can be suppressed to the width of the hydraulic oil tank 3. This allows the exhaust gas aftertreatment device 4 to be accommodated in a limited space.

As shown in FIG. 2, the hydraulic pump 5 is disposed between the hydraulic oil tank 3 and the engine 2, and the exhaust gas aftertreatment device 4 is disposed above the hydraulic pump 5. Normally, the height of the hydraulic pump 5 is lower than the height of the engine 2. Therefore, normally, a space is created between the hydraulic oil tank 3 and the engine 2 and above the hydraulic pump 5. By disposing the exhaust gas aftertreatment device 4 in this space above the hydraulic pump 5, the arrangement space 20 can be made more compact than when the hydraulic pump 5 and the exhaust gas aftertreatment device 4 are disposed next to each other in the horizontal direction.

As shown in FIG. 4, the exhaust gas post-treatment device 4 is supported from below by a support member 7. Both ends (flanges 7a) of the support member 7 in the front-rear direction of the upper rotating body 32 are fixed to the covering member 6. When the exhaust gas post-treatment device 4 is supported by a stand, space is required inside the covering member 6 to arrange the legs of the stand. On the other hand, when the exhaust gas post-treatment device 4 is supported by the support member 7, there is no need to provide space inside the covering member 6 to arrange members such as the legs of the stand. Therefore, by supporting the exhaust gas post-treatment device 4 by the support member 7, the exhaust gas post-treatment device 4 can be supported in a smaller space than when the exhaust gas post-treatment device 4 is supported by a stand.

As shown in FIG. 4, a part of the exhaust gas aftertreatment device 4 is disposed inside the recess 7c of the support member 7. By disposing a part of the exhaust gas aftertreatment device 4 inside the recess 7c of the support member 7, the height to the upper end of the exhaust gas aftertreatment device 4 can be made lower than when the support member 7 does not have the recess 7c. This makes it possible to reduce the height of the arrangement space 20.

Also, as shown in FIG. 4, in a cross-sectional view seen from the width direction, the tank side bottom 7d, which is the bottom of the recess 7c on the hydraulic oil tank 3 side, is positioned higher than the engine side bottom 7e, which is the bottom on the engine 2 side of the tank side bottom 7d. By positioning the tank side bottom 7d higher than the engine side bottom 7e, it is possible to prevent the recess 7c from interfering with the oil filter of the hydraulic oil tank 3, etc. This allows the recess 7c and the hydraulic oil tank 3 to be closer to each other in the fore-and-aft direction of the upper rotating body 32. As a result, it is possible to shorten the length of the arrangement space 20 in the fore-and-aft direction of the upper rotating body 32.

As shown in FIG. 4, the exhaust gas aftertreatment device 4 is supported by the support member 7 below the upper end of the engine 2. By supporting the exhaust gas aftertreatment device 4 below the upper end of the engine 2, the height to the upper end of the exhaust gas aftertreatment device 4 can be reduced compared to when the exhaust gas aftertreatment device 4 is supported at the same height as the upper end of the engine 2 or higher. This allows the height of the installation space 20 to be reduced.

Also, as shown in FIG. 4, the end (flange 7a) of the support member 7 on the engine 2 side overlaps with a part of the engine 2 in the fore-and-aft direction of the upper rotating body 32 above the top end of the engine 2. By overlapping the end of the support member 7 on the engine 2 side with a part of the engine 2 in the fore-and-aft direction of the upper rotating body 32 above the top end of the engine 2, the engine 2 and the exhaust gas aftertreatment device 4 can be brought closer together in the fore-and-aft direction of the upper rotating body 32. This makes it possible to shorten the length of the arrangement space 20 in the fore-and-aft direction of the upper rotating body 32.

As shown in FIG. 5, the bottom of the support member 7 is plate-shaped. Because the bottom of the support member 7 is plate-shaped, the support member 7 can suppress the transfer of heat from the exhaust gas aftertreatment device 4 downwardly to the exhaust gas aftertreatment device 4, compared to when the bottom of the support member 7 is lattice-shaped or the like.

As shown in FIG. 7, the longitudinal direction of the exhaust gas aftertreatment device 4 is disposed at an angle to the front-rear direction of the upper rotating body 32 so as to extend toward the exhaust port 2a of the engine 2 toward the engine 2. By disposing the longitudinal direction of the exhaust gas aftertreatment device 4 at an angle toward the exhaust port 2a of the engine 2, the exhaust gas aftertreatment device 4 and the exhaust port 2a of the engine 2 can be brought closer to each other. This allows the length of the connecting pipe 8 connecting the exhaust port 2a of the engine 2 and the exhaust gas aftertreatment device 4 to be shortened. This makes it possible to suppress a decrease in the temperature of the exhaust gas flowing through the connecting pipe 8.

As shown in FIG. 6, the second processing unit 12 is disposed above the first processing unit 11. By disposing the second processing unit 12 above the first processing unit 11, the arrangement space 20 can be made more compact in the horizontal direction than when the first processing unit 11 and the second processing unit 12 are disposed next to each other in the horizontal direction.

In addition, as shown in FIG. 8, the straight pipe section 8a of the connection pipe 8 and the bent section 9a of the linking pipe 9 overlap in the fore-and-aft direction of the upper rotating body 32. By overlapping the straight pipe section 8a of the connection pipe 8 and the bent section 9a of the linking pipe 9 in the fore-and-aft direction of the upper rotating body 32, the space in which the connection pipe 8 and the linking pipe 9 are arranged can be made compact. This makes it possible to make the arrangement space 20 compact.

Also, as shown in FIG. 4, on the hydraulic oil tank 3 side in the fore-and-aft direction of the upper rotating body 32, a portion of the second processing section 12 overlaps the end of the support member 7 in the fore-and-aft direction of the upper rotating body 32. By overlapping a portion of the second processing section 12 with the end of the support member 7, the space above the end of the support member 7 can be effectively utilized. Also, by overlapping a portion of the second processing section 12 with the end of the support member 7, a space can be created on the engine 2 side of the second processing section 12 in the fore-and-aft direction of the upper rotating body 32. Therefore, other equipment can be placed in this space.

As shown in FIG. 7, the connecting pipe 8 is arranged at an angle to the vertical direction so that it extends upward toward the inside of the width direction of the engine 2. By arranging the connecting pipe 8 at an angle to the vertical direction, the connection part between the exhaust gas aftertreatment device 4 and the connecting pipe 8 can be arranged at a position on the inside of the width direction of the engine 2, compared to when the connecting pipe 8 is arranged in the vertical direction. This reduces the need to arrange the connecting part in a position that protrudes outward in the width direction of the engine 2. This makes it possible to make the arrangement space 20 more compact.

As shown in FIG. 7, the connecting pipe 8 is disposed inside the engine 2 in the width direction. By disposing the connecting pipe 8 inside the engine 2, the connecting pipe 8 is less likely to get in the way when accessing the arrangement space 20 from outside the upper rotating body 32. This makes it possible to conveniently perform maintenance of the equipment in the arrangement space 20.

Although the embodiments of the present invention have been described above, they are merely illustrative examples and do not limit the present invention, and the specific configurations and other aspects can be modified as appropriate. Furthermore, the actions and effects described in the embodiments of the invention are merely a list of the most suitable actions and effects resulting from the present invention, and the actions and effects of the present invention are not limited to those described in the embodiments of the present invention.

1. Crane (working machine)
2 engine 2a exhaust port 3 hydraulic oil tank 4 exhaust gas aftertreatment device 5 hydraulic pump 6 covering member 7 support member 7a, 7b flange 8 connecting pipe 9 connecting pipe 10 fuel filter 11 first treatment section 12 second treatment section 13 bracket 14 intake device 16 cooler 20 arrangement space 31 undercarriage 32 upper revolving body (machine body)
33 Swing frame 34 Boom 35 Cab 36 Gantry 38 Lower spreader 39 Counterweight 41 Point sheave 42 Hoisting rope 43 Hook device 49 Boom guy line 50 Upper spreader 51 Boom hoisting rope

Claims (14)

The machine body,
The engine,
A hydraulic oil tank for storing hydraulic oil;
an exhaust gas aftertreatment device for treating exhaust gas from the engine;
having
the hydraulic oil tank, the exhaust gas aftertreatment device, and the engine are arranged in this order in a front-rear direction of the machine body in an arrangement space provided inside the machine body,
When the directions perpendicular to the front-rear direction and the up-down direction are defined as width directions,
the exhaust gas aftertreatment device is disposed so as to be contained within a width of the hydraulic oil tank in the width direction,
The longitudinal direction of the exhaust gas aftertreatment device is disposed obliquely with respect to the front-rear direction ,
a hydraulic pump that discharges the hydraulic oil in the hydraulic oil tank by driving the engine;
The hydraulic pump is disposed between the hydraulic oil tank and the engine.
A working machine characterized in that the exhaust gas aftertreatment device is disposed above the hydraulic pump . a covering member that covers the exhaust gas aftertreatment device and the engine;
a support member disposed inside the covering member and having both ends in the front-rear direction fixed to the covering member;
having
2. The work machine according to claim 1 , wherein the exhaust gas aftertreatment device is supported from below by the support member. The machine body,
The engine,
A hydraulic oil tank for storing hydraulic oil;
an exhaust gas aftertreatment device for treating exhaust gas from the engine;
having
the hydraulic oil tank, the exhaust gas aftertreatment device, and the engine are arranged in this order in a front-rear direction of the machine body in an arrangement space provided inside the machine body,
When the directions perpendicular to the front-rear direction and the up-down direction are defined as width directions,
the exhaust gas aftertreatment device is disposed so as to be contained within a width of the hydraulic oil tank in the width direction,
The longitudinal direction of the exhaust gas aftertreatment device is disposed obliquely with respect to the front-rear direction ,
a covering member that covers the exhaust gas aftertreatment device and the engine;
a support member disposed inside the covering member and having both ends in the front-rear direction fixed to the covering member;
having
A working machine characterized in that the exhaust gas aftertreatment device is supported from below by the support member . The support member has a recess,
4. The working machine according to claim 2, wherein a part of the exhaust gas aftertreatment device is disposed inside the recess. The work machine according to claim 4, characterized in that, in a cross-sectional view seen from the width direction, the tank side bottom, which is the bottom of the recess on the hydraulic oil tank side, is located higher than the engine side bottom, which is the bottom of the recess on the engine side relative to the tank side bottom. 4. The working machine according to claim 2 or 3 , wherein the exhaust gas aftertreatment device is supported by the support member below an upper end of the engine. 4. The work machine according to claim 2, wherein the end of the support member on the engine side overlaps with a part of the engine in the front-rear direction above an upper end of the engine. 4. The work machine according to claim 2 or 3 , wherein the bottom of the support member is plate-shaped. The machine body,
The engine,
A hydraulic oil tank for storing hydraulic oil;
an exhaust gas aftertreatment device for treating exhaust gas from the engine;
having
the hydraulic oil tank, the exhaust gas aftertreatment device, and the engine are arranged in this order in a front-rear direction of the machine body in an arrangement space provided inside the machine body,
When the directions perpendicular to the front-rear direction and the up-down direction are defined as width directions,
the exhaust gas aftertreatment device is disposed so as to be contained within a width of the hydraulic oil tank in the width direction,
The longitudinal direction of the exhaust gas aftertreatment device is disposed obliquely with respect to the front-rear direction ,
The engine includes an exhaust port disposed at an outer portion of the engine in the width direction,
A working machine, characterized in that a longitudinal direction of the exhaust gas aftertreatment device is disposed obliquely with respect to the front-rear direction so as to extend toward the engine side toward the exhaust port of the engine . The machine body,
The engine,
A hydraulic oil tank for storing hydraulic oil;
an exhaust gas aftertreatment device for treating exhaust gas from the engine;
having
the hydraulic oil tank, the exhaust gas aftertreatment device, and the engine are arranged in this order in a front-rear direction of the machine body in an arrangement space provided inside the machine body,
When the directions perpendicular to the front-rear direction and the up-down direction are defined as width directions,
the exhaust gas aftertreatment device is disposed so as to be contained within a width of the hydraulic oil tank in the width direction,
The longitudinal direction of the exhaust gas aftertreatment device is disposed obliquely with respect to the front-rear direction ,
The exhaust gas aftertreatment device comprises:
A first processing unit connected to an exhaust port of the engine via a connecting pipe;
a second processing section provided downstream of the first processing section and connected to the first processing section via a connecting pipe;
having
The second processing unit is disposed above the first processing unit,
the connecting pipe has a straight pipe portion connected to the first processing section in a longitudinal direction of the first processing section,
the connecting pipe has a bent portion bent with respect to a longitudinal direction of the first processing section and connected to the second processing section,
A working machine, characterized in that the straight pipe portion and the bent portion overlap in the front-rear direction . a covering member that covers the exhaust gas aftertreatment device and the engine;
a support member disposed inside the covering member and having both ends in the front-rear direction fixed to the covering member;
having
The work machine according to claim 10, wherein a portion of the second processing section overlaps, in the front-rear direction, with an end of the support member on the hydraulic oil tank side in the front-rear direction. The machine body,
The engine,
A hydraulic oil tank for storing hydraulic oil;
an exhaust gas aftertreatment device for treating exhaust gas from the engine;
having
the hydraulic oil tank, the exhaust gas aftertreatment device, and the engine are arranged in this order in a front-rear direction of the machine body in an arrangement space provided inside the machine body,
When the directions perpendicular to the front-rear direction and the up-down direction are defined as width directions,
the exhaust gas aftertreatment device is disposed so as to be contained within a width of the hydraulic oil tank in the width direction,
The longitudinal direction of the exhaust gas aftertreatment device is disposed obliquely with respect to the front-rear direction ,
a connecting pipe connecting the engine and the exhaust gas aftertreatment device,
the engine includes an exhaust port to which the connecting pipe is connected;
the exhaust port is disposed at an outer portion of the engine in the width direction and is disposed below the exhaust gas aftertreatment device,
A working machine characterized in that the connecting pipe is disposed obliquely with respect to the up-down direction so as to extend upwardly toward the inside in a width direction of the engine . The machine body,
The engine,
A hydraulic oil tank for storing hydraulic oil;
an exhaust gas aftertreatment device for treating exhaust gas from the engine;
having
the hydraulic oil tank, the exhaust gas aftertreatment device, and the engine are arranged in this order in a front-rear direction of the machine body in an arrangement space provided inside the machine body,
When the directions perpendicular to the front-rear direction and the up-down direction are defined as width directions,
the exhaust gas aftertreatment device is disposed so as to be contained within a width of the hydraulic oil tank in the width direction,
The longitudinal direction of the exhaust gas aftertreatment device is disposed obliquely with respect to the front-rear direction ,
a connecting pipe connecting the engine and the exhaust gas aftertreatment device,
A working machine, characterized in that the connecting pipe is arranged more inward than the engine in the width direction . a hydraulic pump that discharges the hydraulic oil in the hydraulic oil tank by driving the engine;
The hydraulic pump is disposed between the hydraulic oil tank and the engine.
14. The work machine according to claim 9, wherein the exhaust gas aftertreatment device is disposed above the hydraulic pump.

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