JP5501112B2 - Work vehicle - Google Patents

Description

  The present invention relates to a work vehicle.

  An exhaust gas treatment device is mounted on the work vehicle. The exhaust gas treatment device is, for example, a device that reduces nitrogen oxide (NOx), a device that reduces carbon monoxide (CO), or a device that reduces particulate matter. For example, in a work vehicle disclosed in Patent Document 1, an exhaust gas treatment device is disposed in an engine room together with an engine. The exhaust gas treatment device has a tubular case, and the tubular case is provided with a plurality of mounting brackets. The mounting bracket projects from the tubular case in the left-right direction. The exhaust gas treatment device is attached to the vehicle body by fixing the mounting bracket to the cover member on the vehicle body side via the vibration isolation member.

JP 2010-7525 A

  The exhaust gas treatment device may be removed from the vehicle body for maintenance. In the work vehicle described above, the exhaust gas processing device is provided in the engine compartment, the fixing of the mounting bracket and the cover member of the vehicle body is released, and the exhaust gas processing device is removed from the vehicle body. As described above, the mounting bracket is provided so as to slightly protrude in the left-right direction from the tubular case, but is not provided below the tubular case. For this reason, when the exhaust gas treatment device removed from the vehicle body is placed on the ground, the tubular case directly contacts the floor or the ground. In particular, when the exhaust gas treatment device is removed from the vehicle body at a work site, the exhaust gas treatment device may be placed on rough ground. In such a case, the exhaust gas treatment device may be damaged. On the other hand, the exhaust gas treatment device needs to be regularly maintained. For this reason, it is preferable that the exhaust gas treatment device can be easily detached from the vehicle body and attached to the vehicle body without the tubular case and the bracket interfering with surrounding structures such as a cover member. An object of the present invention is to provide a work vehicle that can prevent the exhaust gas processing device removed from the vehicle body from being damaged and can be easily attached to and detached from the vehicle body.

A work vehicle according to a first aspect of the present invention includes an engine, an exhaust gas processing device, a pipe, a mounting member, a fixing member, a support, a first fixing bolt, and a second fixing bolt. . The exhaust gas processing device processes exhaust gas from the engine. The exhaust gas treatment device has a tube body and a connection port. The connection port protrudes downward from the horizontal direction. The piping is connected to the connection port. The mounting member has a first mounting hole penetrating in the vertical direction and a second mounting hole penetrating in the vertical direction . The attachment member is disposed below the exhaust gas treatment device and attached to the exhaust gas treatment device. The fixing member fixes the exhaust gas processing device and the mounting member. The support has a first screw hole provided at a position corresponding to the first mounting hole and a second screw hole provided at a position corresponding to the second mounting hole . The support is disposed below the mounting member and supports the mounting member. The first fixing bolt is inserted into the first mounting hole and the first screw hole from above to fix the mounting member and the support.

The first mounting hole is provided in a portion of the mounting member that is located outside the exhaust gas processing device in a top view. The second mounting hole is provided in a portion of the mounting member that is located outside the exhaust gas processing device in a top view. The second mounting hole is disposed at a distance from the first mounting hole in the axial direction of the tubular body. The second fixing bolt is inserted from above into the second mounting hole and the second screw hole, thereby fixing the mounting member and the support. The edge of the attachment member has a shape that is recessed between the first attachment hole and the second attachment hole.

  A work vehicle according to a second aspect of the present invention is the work vehicle according to any one of the first aspects, and the pipe is fixed to the support.

  A work vehicle according to a third aspect of the present invention includes an engine, an exhaust gas processing device, piping, a mounting member, a fixing member, a support, and a first fixing bolt. The exhaust gas processing device processes exhaust gas from the engine. The exhaust gas treatment device has a tube body and a connection port. The connection port protrudes downward from the horizontal direction. The piping is connected to the connection port. The attachment member has a first attachment hole penetrating in the vertical direction. The attachment member is disposed below the exhaust gas treatment device and attached to the exhaust gas treatment device. The fixing member fixes the exhaust gas processing device and the mounting member. The support has a first screw hole provided at a position corresponding to the first mounting hole. The support is disposed below the mounting member and supports the mounting member. The first fixing bolt is inserted into the first mounting hole and the first screw hole from above to fix the mounting member and the support. The pipe is fixed to the support.

A work vehicle according to a fourth aspect of the present invention is the work vehicle according to the third aspect, wherein the first attachment hole is provided in a portion of the attachment member that is located outside the exhaust gas treatment device in a top view. It is done.

The work vehicle according to a fifth aspect of the present invention is the work vehicle according to the fourth aspect, and further includes a second fixing bolt. The attachment member further has a second attachment hole penetrating in the vertical direction. The second mounting hole is provided in a portion of the mounting member that is located outside the exhaust gas processing device in a top view. The second mounting hole is disposed at a distance from the first mounting hole in the axial direction of the tubular body. The support has a second screw hole provided at a position corresponding to the second mounting hole. The second fixing bolt is inserted from above into the second mounting hole and the second screw hole, thereby fixing the mounting member and the support. The edge of the attachment member has a shape that is recessed between the first attachment hole and the second attachment hole.

A work vehicle according to a sixth aspect of the present invention is the work vehicle according to any one of the second to fifth aspects, wherein the pipe includes a first end, a second end, and a vibration absorber. Have. The first end is connected to the connection port. The second end is connected to the engine or other component. The vibration absorber is provided between the first end and the second end and has a bellows shape. The pipe is fixed to the support at a portion between the first end and the vibration absorbing portion.

The work vehicle according to a seventh aspect of the present invention is the work vehicle according to any one of the first to sixth aspects, wherein the lower end portion of the connection port is located above the bottom surface of the attachment member.

  In the work vehicle according to the first aspect of the present invention, the first fixing bolt is inserted into the first mounting hole and the first screw hole from above to fix the mounting member and the support. Accordingly, the attachment member and the support can be easily fixed and released from above. For this reason, the operation | work which removes an exhaust-gas treatment apparatus and an attachment member integrally from a vehicle body, or attaches to a vehicle body can be performed easily.

  Further, even if the exhaust treatment device and the attachment member removed from the vehicle body are placed on the ground, the exhaust gas treatment device can be supported by the attachment member. That is, the attachment member can function as a support for the exhaust gas treatment device. For this reason, it can suppress that an exhaust-gas processing apparatus contacts the ground and is damaged. Moreover, even if the connection port of the exhaust gas treatment device protrudes downward from the tube in the horizontal direction, the connection port is unlikely to contact the ground. For this reason, it can suppress that a connection port is damaged.

  As described above, in the work vehicle according to the first aspect of the present invention, it is possible to suppress damage to the exhaust gas processing device detached from the vehicle body, and it is easy to attach and detach the exhaust gas processing device to the vehicle body. .

  Further, the first mounting hole and the first screw hole are provided so as to be located outside the exhaust gas processing device in a top view. For this reason, it is possible to prevent the exhaust gas treatment device from interfering with the work when attaching or removing the exhaust gas treatment device and the attachment member.

  Moreover, the edge part of an attachment member has a shape dented between the 1st attachment hole and the 2nd attachment hole. For this reason, when working with respect to the device arranged below the mounting member, the mounting member can be prevented from obstructing the work.

  In the work vehicle according to the second aspect of the present invention, the pipe is fixed to the support. For this reason, the exhaust gas treatment device and the attachment member can be detached from the support and the pipe in a state where the pipe is fixed to the support. For this reason, the piping does not interfere with the work during the removal work. Alternatively, it is not necessary to remove only the piping first. For this reason, work can be performed easily.

  In the work vehicle according to the third aspect of the present invention, it is possible to prevent the exhaust gas processing device removed from the vehicle body from being damaged, and the exhaust gas processing device can be easily attached to and detached from the vehicle body. Moreover, since piping is fixed to a support body, an exhaust gas processing apparatus and an attachment member can be removed from a support body and piping in the state in which piping was fixed to the support body. For this reason, the piping does not interfere with the work during the removal work. Alternatively, it is not necessary to remove only the piping first. For this reason, work can be performed easily.

In the work vehicle according to the fourth aspect of the present invention, the first mounting hole and the first screw hole are provided so as to be located outside the exhaust gas processing device in a top view. For this reason, it is possible to prevent the exhaust gas treatment device from interfering with the work when attaching or removing the exhaust gas treatment device and the attachment member.

In the work vehicle according to the fifth aspect of the present invention, the edge of the attachment member has a shape recessed between the first attachment hole and the second attachment hole. For this reason, when working with respect to the device arranged below the mounting member, the mounting member can be prevented from obstructing the work.

In the work vehicle according to the sixth aspect of the present invention, the pipe is fixed to the support body between the first end portion and the vibration absorbing portion. For this reason, vibration from the support and vibration from the engine or other components can be absorbed by the vibration absorber. Thereby, it is suppressed that piping is damaged.

In the work vehicle according to the seventh aspect of the present invention, the lower end portion of the connection port is located above the bottom surface of the mounting member. For this reason, when the exhaust gas treatment device and the mounting member are placed on the ground, the lower end of the connection port does not contact the ground. By this. Damage to the connection port is suppressed.

1 is a perspective view of a work vehicle according to an embodiment of the present invention. The front view of the apparatus arrange | positioned in the engine compartment of a work vehicle. It is the figure which looked at the exhaust-gas processing apparatus and the support mechanism among the said apparatuses from the engine side side. The front view of an exhaust-gas processing apparatus and a support mechanism. The side view of an exhaust-gas processing apparatus and a 1st supporting member. The perspective view of a 1st support member. The top view of an exhaust-gas processing apparatus and a support mechanism. The top view of the 1st support member. The rear view of an exhaust-gas processing apparatus and a 1st supporting member. The side view of a 2nd support member and a reinforcement member. The top view of the 2nd support member.

  A work vehicle 100 according to an embodiment of the present invention is shown in FIG. The work vehicle 100 is a hydraulic excavator and includes a vehicle main body 1 and a work implement 4.

  The vehicle body 1 includes a traveling body 2 and a turning body 3. The traveling body 2 includes a pair of traveling devices 2a and 2b. Each traveling device 2a, 2b has crawler belts 2d, 2e. The traveling devices 2a and 2b cause the work vehicle 100 to travel by driving the crawler belts 2d and 2e with hydraulic oil from a hydraulic pump 23 (see FIG. 2) described later.

  The swivel body 3 is placed on the traveling body 2. The swivel body 3 is provided so as to be turnable with respect to the traveling body 2. Further, a cab 5 is provided at the front left side position of the revolving structure 3. The revolving unit 3 includes a fuel tank 14, a hydraulic oil tank 15, an engine chamber 16, and a counterweight 18. The fuel tank 14 stores fuel for driving an engine 21 described later. The fuel tank 14 is disposed in front of the hydraulic oil tank 15. The hydraulic oil tank 15 stores hydraulic oil discharged from a hydraulic pump 23 (see FIG. 2) described later. The hydraulic oil tank 15 is arranged side by side with the fuel tank 14 in the front-rear direction of the vehicle body. The engine chamber 16 houses devices such as the engine 21, the hydraulic pump 23, and the exhaust gas processing device 25, as will be described later. The engine compartment 16 is disposed behind the cab 5, the fuel tank 14, and the hydraulic oil tank 15. An upper portion of the engine chamber 16 is covered with an engine hood 17. The engine hood 17 is attached to the vehicle body so that the engine compartment 16 can be opened and closed. A hole is formed in the engine hood 17, and an exhaust pipe 19 protrudes upward through the hole. The counterweight 18 is disposed behind the engine chamber 16.

  The work machine 4 is attached to the front center position of the revolving structure 3 and includes a boom 7, an arm 8, a bucket 9, a boom cylinder 10, an arm cylinder 11, and a bucket cylinder 12. A base end portion of the boom 7 is rotatably connected to the swing body 3. Further, the distal end portion of the boom 7 is rotatably connected to the proximal end portion of the arm 8. The tip of the arm 8 is rotatably connected to the bucket 9. The boom cylinder 10, the arm cylinder 11, and the bucket cylinder 12 are hydraulic cylinders that are driven by hydraulic oil discharged from a hydraulic pump 23 described later. The boom cylinder 10 operates the boom 7. The arm cylinder 11 operates the arm 8. The bucket cylinder 12 operates the bucket 9. The work machine 4 is driven by driving these cylinders 10, 11, and 12.

  As shown in FIG. 2, various devices are arranged inside the engine chamber 16. Specifically, an engine 21, a flywheel housing 22, a hydraulic pump 23, an exhaust gas processing device 25, a support mechanism 26, and the like are disposed inside the engine chamber 16. FIG. 2 is a front view of these devices as viewed from the front of the vehicle body.

  The hydraulic pump 23 is driven by a driving force from the engine 21. The hydraulic pump 23 is disposed on the side of the engine 21. That is, the hydraulic pump 23 is arranged side by side with the engine 21 in the vehicle width direction. A flywheel housing 22 is disposed between the engine 21 and the hydraulic pump 23. The flywheel housing 22 is attached to one side surface of the engine 21. A hydraulic pump 23 is attached to the side surface of the flywheel housing 22. A blower fan 24 is disposed on the side of the engine 21 opposite to the hydraulic pump 23 side. The blower fan 24 is attached to the other side surface of the engine 21. The blower fan 24 is an axial fan, and generates a flow of air along the axial direction of the blower fan 24. Thereby, the blower fan 24 generates an air flow around the engine 21.

  The exhaust gas processing device 25 is a device for processing exhaust gas from the engine 21 and is a diesel particulate filter type processing device. The exhaust gas treatment device 25 collects particulate matter contained in the exhaust gas with a filter, and incinerates the collected particulate matter with a heater attached to the filter. As shown in FIG. 3, the exhaust gas treatment device 25 includes a tube body 27, a first connection port 28, and a second connection port 29. FIG. 3 is a view of the exhaust gas processing device 25 and the support mechanism 26 as viewed from the side of the engine side.

  The tube body 27 has a substantially cylindrical outer shape. The central axis of the tube body 27 is disposed along the front-rear direction of the vehicle body. In the following description, “the axial direction of the tube body 27” means a direction parallel to the central axis of the tube body 27. Further, “the width direction of the tube body 27” means a direction that is perpendicular and horizontal to the central axis of the tube body 27. The tube body 27 has a plurality of tube portions 31-33. Specifically, the tube body 27 includes a first tube portion 31, a second tube portion 32, and a third tube portion 33. The first tube portion 31, the second tube portion 32, and the third tube portion 33 are arranged side by side in the axial direction of the tube body 27. These tube portions 31-33 are fixed to each other by annular clamps 34, 35.

  The first connection port 28 is provided on the peripheral surface of the tube body 27. Specifically, the first connection port 28 is provided on the peripheral surface of the first pipe portion 31. The first connection port 28 is provided at one end portion in the axial direction of the tube body 27 on the peripheral surface of the tube body 27. A second connection port 29 is provided at the other end of the tubular body 27 in the axial direction on the circumferential surface of the tubular body 27. As shown in FIG. 4, the first connection port 28 protrudes downward from the horizontal direction. FIG. 4 is a front view of the exhaust gas treatment device and the support mechanism 26 as viewed from the front of the vehicle body. The first connection port 28 is provided so as to protrude obliquely downward from the peripheral surface of the tube body 27. The protruding direction of the first connection port 28 from the tube body 27 is inclined at an angle closer to the vertical direction than to the horizontal direction. The first connection port 28 may protrude from the tube body 27 directly below. The lower end portion of the first connection port 28 is located above the bottom surface of the first support member 41 described later. The first connection port 28 is connected to the connection pipe 37. The connection pipe 37 will be described later.

  As shown in FIG. 3, the second connection port 29 is provided on the peripheral surface of the tube body 27. Specifically, the second connection port 29 is provided on the peripheral surface of the third pipe portion 33. The second connection port 29 is provided so as to protrude upward from the peripheral surface of the tube body 27. The second connection port 29 is provided at the end of the tube body 27 opposite to the first connection port 28. The exhaust pipe 19 (see FIG. 1) described above is connected to the second connection port 29.

  The support mechanism 26 supports the exhaust gas processing device 25. The exhaust gas treatment device 25 is fixed to a support mechanism 26, and the support mechanism 26 is fixed to the flywheel housing 22. That is, the exhaust gas processing device 25 is fixed to the vehicle body via the support mechanism 26. The support mechanism 26 includes a first support member 41, a second support member 42, and a plurality of reinforcing members 43 and 44. The first support member 41, the second support member 42, and the reinforcing members 43 and 44 are separate parts.

  The first support member 41 is a separate member from the exhaust gas treatment device 25 and is a member to which the exhaust gas treatment device 25 is fixed. As shown in FIG. 5, the first support member 41 includes a first support part 45, a second support part 46, and a connecting part 47. FIG. 5 shows a state in which the first support member 41 is detached from the second support member 42.

  The first support portion 45 is a portion that supports the exhaust gas processing device 25 from below. The first support portion 45 extends upward from one end portion of the connecting portion 47 in the axial direction of the tube body 27. Note that the second support portion 46 extends upward from the other end portion of the connecting portion 47 in the axial direction of the tube body 27. As shown in FIG. 6, a concave portion 45 a that is curved along the bottom surface of the tube body 27 is provided in the central portion of the upper surface of the first support portion 45 in the width direction of the tube body 27. FIG. 6 is a perspective view of the first support member 41. As shown in FIG. 7, the first support portion 45 is larger than the tube body 27 in the width direction of the tube body 27. Therefore, portions of the upper surface of the first support portion 45 located on both sides of the concave portion 45a (hereinafter referred to as “first upper surface side portion 45b” and “second upper surface side portion 45c”) Located outside the body 27. Each of the first upper surface side portion 45b and the second upper surface side portion 45c has a flat shape. Further, as shown in FIG. 8, the first upper surface side portion 45b and the second upper surface side portion 45c are provided with mounting holes 45d and 45e, respectively. These mounting holes 45d and 45e penetrate the first support portion 45 in the vertical direction. A first U-shaped bolt 48 (see FIG. 5), which will be described later, is passed through the mounting holes 45d and 45e. Further, as shown in FIGS. 4 and 6, concave portions 45 f and 45 g that are recessed in the axial direction of the tube body 27 are provided in a portion of the first support portion 45 located below the mounting holes 45 d and 45 e. It has been.

  As shown in FIG. 5, the second support portion 46 is a portion that supports the exhaust gas processing device 25 from below. The second support portion 46 is disposed at a distance from the first support portion 45 in the direction along the exhaust gas processing device 25. In other words, the second support portion 46 is disposed at a distance from the first support portion 45 in the axial direction of the tube body 27. As shown in FIG. 6, in the central portion of the upper surface of the second support portion 46 in the axial direction of the tube body 27, a concave portion curved along the bottom surface of the tube body 27, similar to the upper surface of the first support portion 45. 46a is provided. As shown in FIG. 7, the second support portion 46 is larger than the tube body 27 in the width direction of the tube body 27. Therefore, portions of the upper surface of the second support portion 46 located on both sides of the recess 46a in the width direction of the tube body 27 (hereinafter referred to as “third upper surface side portion 46b” and “fourth upper surface side portion 46c”). ) Is located outside the tubular body 27 in a top view. The third upper surface side portion 46b and the fourth upper surface side portion 46c each have a flat shape. Further, as shown in FIG. 8, the third upper surface side portion 46b and the fourth upper surface side portion 46c are provided with a pair of mounting holes 46d and 46e. These mounting holes 46d and 46e penetrate the second support portion 46 in the vertical direction. A second U-shaped bolt 49 (see FIG. 5) to be described later is passed through these mounting holes 46d and 46e. As shown in FIG. 9, openings 46f and 46g are provided in portions of the second support portion 46 located below the mounting holes 46d and 46e. The openings 46f and 46g penetrate the second support portion 46 in the vertical direction.

  As shown in FIG. 5, the exhaust gas treatment device 25 is fixed to the first support member 41 by a first U-shaped bolt 48 and a second U-shaped bolt 49. The first U-bolt 48 is disposed so as to surround the periphery of the tube body 27. Specifically, the first U-shaped bolt 48 is disposed so as to surround the periphery of the first pipe portion 31. Both end portions of the first U-shaped bolt 48 are respectively inserted into the mounting holes 45d and 45e of the first support portion 45 described above. As shown in FIG. 4, nuts 45 h and 45 i are disposed below the mounting holes 45 d and 45 e of the first support portion 45, and are screwed into the end portion of the first U-shaped bolt 48. The second U-shaped bolt 49 is disposed so as to surround the periphery of the tube body 27. Specifically, the second U-shaped bolt 49 is disposed so as to surround the third pipe portion 33. Both end portions of the second U-shaped bolt 49 are respectively inserted into the mounting holes 46d and 46e of the second support portion 46 (see FIG. 3). As shown in FIG. 9, nuts 46 h and 46 i are disposed below the mounting holes 46 d and 46 e of the second support portion 46, and are screwed into the end portions of the second U-shaped bolts 49.

  As shown in FIG. 5, the connecting portion 47 is a portion that connects the first support portion 45 and the second support portion 46. The connecting portion 47 is disposed below the exhaust gas processing device 25 with a distance from the exhaust gas processing device 25. The connecting portion 47 includes a first plate-like portion 51, a second plate-like portion 52, a first wall portion 53, a first inclined portion 54, and a second inclined portion 55.

  The first plate-like portion 51 is provided along the longitudinal direction of the exhaust gas processing device 25. In other words, the first plate-like portion 51 is provided along the axial direction of the tubular body 27 and is disposed substantially horizontally. The first plate-like portion 51 is located below the tube body 27 and is arranged with a space in the vertical direction with respect to the tube body 27.

  The second plate-like part 52 is disposed below the first plate-like part 51. Similar to the first plate portion 51, the second plate portion 52 is provided along the longitudinal direction of the exhaust gas processing device 25. In other words, the second plate-like portion 52 is provided along the axial direction of the tubular body 27 and is disposed substantially horizontally. The second plate-like part 52 is arranged substantially parallel to the first plate-like part 51. Further, the bottom surface of the second plate-like portion 52 has a flat shape. That is, the bottom surface of the first support member 41 has a flat shape. As shown in FIG. 8, the second plate-like portion 52 has a shape larger than that of the first plate-like portion 51 in the width direction of the tubular body 27. For this reason, both ends of the second plate-shaped portion 52 in the width direction of the tubular body 27 are located outside the first plate-shaped portion 51 in a top view.

  The second plate-like portion 52 is provided with a plurality of mounting holes 52a-52d. These mounting holes 52a-52d penetrate the second plate-like portion 52 in the vertical direction. Bolts 66a-66d (see FIG. 7) for fixing the first support member 41 and the second support member 42 to each other are passed through the mounting holes 52a-52d. The mounting holes 52a to 52d are provided in a portion of the second plate-like portion 52 that is located outside the exhaust gas processing device 25 in a top view. That is, the mounting holes 52a to 52d are provided in the second plate-like portion 52 at positions that do not overlap with the exhaust gas processing device 25 in a top view. In addition, the mounting holes 52a to 52d are provided at positions in the second plate-like portion 52 that do not overlap with other members such as the first support portion 45 and the second support portion 46 in the first support member 41 in a top view. It has been. Specifically, the second plate-like portion 52 is provided with first to fourth attachment holes 52a to 52d. The first mounting hole 52a and the second mounting hole 52b are provided in a portion of the second plate-like portion 52 that protrudes from the exhaust gas processing device 25 to the engine 21 side (right side in FIG. 8) in a top view. The second mounting hole 52b is disposed at a distance from the first mounting hole 52a in the axial direction of the tube body 27. The third mounting hole 52c and the fourth mounting hole 52d are provided in a portion of the second plate-like portion 52 that protrudes from the exhaust gas processing device 25 to the side opposite to the engine 21 in a top view. That is, the third attachment hole 52c and the fourth attachment hole 52d are provided in a portion of the second plate-like portion 52 that protrudes from the exhaust gas processing device 25 to the hydraulic pump 23 side (left side in FIG. 8) when viewed from above. ing. The fourth mounting hole 52d is disposed at a distance from the third mounting hole 52c in the axial direction of the tubular body 27. The first to fourth mounting holes 52a to 52d are spaced apart from the mounting holes 45d and 45e of the first support part 45 and the mounting holes 46d and 46e of the second support part 46 in the axial direction of the tubular body 27. They are spaced apart.

  A first recess 52e is provided at the edge of the second plate-like portion 52 on the engine 21 side. The first recess 52e has a shape that is recessed between the first mounting hole 52a and the second mounting hole 52b at the edge of the second plate-shaped portion 52 on the engine 21 side. A second recess 52f is provided at the edge of the second plate-like portion 52 on the hydraulic pump 23 side. The second recess 52f has a shape that is recessed between the third attachment hole 52c and the fourth attachment hole 52d at the edge of the second plate-like part 52 on the hydraulic pump 23 side. A third recess 52g is provided at the edge of the second plate-like portion 52 on the engine 21 side. The third recess 52g is arranged side by side in the axial direction of the tube body 27 with respect to the first recess 52e. The third recess 52 g is located between the first recess 52 e and the first support portion 45 in the axial direction of the tube body 27.

  As shown in FIG. 6, the first wall portion 53 is disposed so as to intersect the axial direction of the blower fan 24, and is disposed slightly inclined with respect to the vertical direction. The first wall portion 53 is provided across the first plate-like portion 51 and the second plate-like portion 52. Specifically, the first wall portion 53 is provided across the end portion of the first plate-like portion 51 in the width direction of the tubular body 27 and the upper surface of the second plate-like portion 52. Further, as shown in FIG. 5, the first wall portion 53 is provided with a plurality of openings 53 a and 53 b. These openings 53 a and 53 b are provided so as to penetrate the first wall portion 53. That is, these openings 53 a and 53 b are provided so as to penetrate the first wall portion 53 in the axial direction of the blower fan 24. Specifically, the first wall 53 is provided with a first opening 53a and a second opening 53b. The first opening 53 a and the second opening 53 b are provided between the first plate-like portion 51 and the second plate-like portion 52. The first opening 53 a and the second opening 53 b are provided in a position facing the upper surface of the second plate-like portion 52 in the first wall portion 53. The first opening 53 a and the second opening 53 b are arranged side by side in the axial direction of the tube body 27. Further, as shown in FIG. 6, in the second plate-like portion 52 described above, a portion located between the first opening 53 a and the second opening 53 b in the axial direction of the tube body 27 has a third opening 53 c. Is provided. The third opening 53c penetrates the second plate-like portion 52 in the vertical direction.

  As shown in FIG. 5, the first inclined portion 54 is arranged side by side in the axial direction of the tubular body 27 with respect to the first plate-like portion 51, the second plate-like portion 52, and the first wall portion 53. ing. The upper surface of the first inclined portion 54 is connected to the upper surface of the first plate-like portion 51 substantially flush. On the upper surface of the first inclined portion 54, a first inclined surface 54a is provided that is inclined so as to be positioned downward toward the first plate-like portion 51 side. The first inclined surface 54 a is inclined so as to be positioned lower as it is away from the first support portion 45 in the axial direction of the tube body 27.

  The second inclined portion 55 is arranged side by side in the axial direction of the tubular body 27 with respect to the first plate-like portion 51, the second plate-like portion 52, and the first wall portion 53. The first plate portion 51, the second plate portion 52, and the first wall portion 53 are disposed between the first inclined portion 54 and the second inclined portion 55 in the axial direction of the tubular body 27. . The upper surface of the second inclined portion 55 is connected to the upper surface of the second plate-like portion 52 substantially flush. On the upper surface of the second inclined portion 55, a second inclined surface 55a is provided that is inclined so as to be positioned downward toward the first plate-like portion 51 side. The second inclined surface 55 a is inclined so as to be positioned downward as it is away from the second support portion 46 in the axial direction of the tube body 27.

  As shown in FIG. 3, the second support member 42 is a member to which the first support member 41 is fixed. The second support member 42 is disposed below the first support member 41 and supports the first support member 41. The second support member 42 is disposed above the flywheel housing 22 and is fixed to the upper surface of the flywheel housing 22. As shown in FIG. 10, the second support member 42 includes an upper surface portion 61, a bottom surface portion 62, a second wall portion 63, a first side surface portion 64, and a second side surface portion 65.

  The upper surface portion 61 is provided along the axial direction of the tubular body 27 and is disposed substantially horizontally. The upper surface portion 61 is located below the second plate-like portion 52 of the first support member 41 and is fixed to the second plate-like portion 52. As shown in FIG. 11, the upper surface portion 61 is provided with a plurality of screw holes 61a-61d provided at positions corresponding to the plurality of mounting holes 52a-52d of the first support member 41 described above. Specifically, the upper surface portion 61 is provided with first to fourth screw holes 61a to 61d. The first screw hole 61a is provided at a position corresponding to the first mounting hole 52a. The second screw hole 61b is provided at a position corresponding to the second mounting hole 52b. The third screw hole 61c is provided at a position corresponding to the third attachment hole 52c. The fourth screw hole 61d is provided at a position corresponding to the fourth mounting hole 52d. In addition, the upper surface portion 61 is provided with an opening 61e. The opening 61e is provided at a position corresponding to the third opening 53c (see FIG. 6) of the first support member 41.

  As shown in FIG. 7, the work vehicle 100 includes a plurality of fixing bolts 66 a to 66 d for fixing the first support member 41 and the second support member 42 to each other. Specifically, work vehicle 100 has first to fourth fixing bolts 66a to 66d. The first fixing bolt 66a is inserted into the first mounting hole 52a and the first screw hole 61a from above. The second fixing bolt 66b is inserted into the second mounting hole 52b and the second screw hole 61b from above. The third fixing bolt 66c is inserted into the third mounting hole 52c and the third screw hole 61c from above. The fourth fixing bolt 66d is inserted into the fourth mounting hole 52d and the fourth screw hole 61d from above. The first to fourth fixing bolts 66a to 66d are screwed into the first to fourth screw holes 61a to 61d, respectively, so that the second plate-like portion 52 of the first support member 41 is placed on the upper surface of the second support member 42. It fixes to the part 61.

  As shown in FIG. 10, the bottom surface portion 62 is disposed below the top surface portion 61. The bottom surface part 62 is arranged at a distance from the top surface part 61 in the vertical direction. The bottom surface portion 62 is disposed substantially parallel to the top surface portion 61. The bottom surface portion 62 is fixed to the upper surface of the flywheel housing 22. The bottom surface portion 62 has a smaller shape than the top surface portion 61 and is disposed so as to overlap the top surface portion 61 when viewed from above.

  The 2nd wall part 63 is arrange | positioned so that it may cross | intersect with respect to a horizontal direction, and is arrange | positioned along the up-down direction. Further, the second wall 63 is provided along the axial direction of the tube body 27. The second wall portion 63 is provided across the upper surface portion 61 and the bottom surface portion 62. The second wall portion 63 is provided with a plurality of openings 63a and 63b. These openings 63 a and 63 b are provided so as to penetrate the second wall portion 63. That is, these openings 63 a and 63 b are provided so as to penetrate the second wall 63 in the axial direction of the blower fan 24. Specifically, the second wall 63 is provided with a fourth opening 63a and a fifth opening 63b. The fourth opening 63 a and the fifth opening 63 b are provided between the upper surface portion 61 and the bottom surface portion 62. The fourth opening 63a and the fifth opening 63b are arranged side by side in the vertical direction. The fourth opening 63a is provided above the fifth opening 63b. The fourth opening 63 a is provided at a position facing the lower surface of the upper surface portion 61 in the second wall portion 63. The fifth opening 63 b is provided at a position facing the upper surface of the bottom surface portion 62 in the second wall portion 63.

  The 1st side part 64 is arrange | positioned along the up-down direction. Further, the first side surface portion 64 is provided along the width direction of the tube body 27. The first side surface portion 64 is provided across the upper surface portion 61 and the bottom surface portion 62. The first side surface portion 64 is provided substantially perpendicular to the second wall portion 63. As shown in FIG. 4, the first side surface portion 64 has a tapered shape with a width that decreases toward the bottom.

  As shown in FIG. 10, the second side surface portion 65 is disposed along the vertical direction. Further, the second side surface portion 65 is provided along the width direction of the tube body 27. The second side surface portion 65 is provided across the upper surface portion 61 and the bottom surface portion 62. The second side surface portion 65 is provided substantially perpendicular to the second wall portion 63. The second side surface portion 65 is disposed at a distance from the first side surface portion 64 in the axial direction of the tube body 27. The second side surface portion 65 is provided substantially in parallel with the first side surface portion 64. As shown in FIG. 9, the second side surface portion 65 has a tapered shape whose width decreases toward the lower side, like the first side surface portion 64.

  As shown in FIG. 10, the reinforcing members 43 and 44 are disposed below the second support member 42. The reinforcing members 43 and 44 are fixed to the second support member 42 and the flywheel housing 22. The reinforcing members 43 and 44 include a first reinforcing member 43 and a second reinforcing member 44. As shown in FIG. 4, the first reinforcing member 43 has a first main body portion 71 and a first rib portion 72. The first main body 71 has a plate shape bent in an L shape. The first main body 71 is fixed to the bottom surface of the second support member 42 and the side surface of the flywheel housing 22. The first rib portion 72 is provided perpendicular to the first main body portion 71. As shown in FIG. 9, the second reinforcing member 44 has a second main body portion 73 and a second rib portion 74. The second main body portion 73 has a plate shape bent in an L shape. The second main body 73 is fixed to the bottom surface of the second support member 42 and the side surface of the flywheel housing 22. The second rib portion 74 is provided perpendicular to the second main body portion 73. As shown in FIG. 10, the lower ends of the first reinforcing member 43 and the second reinforcing member 44 have a cutout shape so as to avoid the hydraulic pump 23.

  As shown in FIG. 2, the connection pipe 37 connects the engine 21 and the exhaust gas processing device 25. One end of the connection pipe 37 is connected to the first connection port 28 of the exhaust gas processing device 25. The other end of the connection pipe 37 is connected to the exhaust port of the engine 21 via the turbocharger 39. As shown in FIG. 4, one end of the connection pipe 37 (hereinafter referred to as “first end 37 a”) is connected to the first connection port 28. The other end of the connection pipe 37 (hereinafter referred to as “second end 37 b”) is connected to the engine 21. The connection pipe 37 has a shape bent at a plurality of locations. A vibration absorber 37c is provided between the first end 37a and the second end 37b of the connection pipe 37. The vibration absorbing portion 37 c has a bellows shape and absorbs vibration transmitted from the engine 21 and the exhaust gas processing device 25 to the connection pipe 37. Further, the connection pipe 37 is provided with a protrusion 37d. The protruding portion 37d is provided between the first end portion 37a and the vibration absorbing portion 37c. The protruding portion 37d is fixed to the first side surface portion 64 of the second support member 42 described above via the bracket 38. Accordingly, the connection pipe 37 is fixed to the second support member 42 at a portion between the first end portion 37a and the vibration absorbing portion 37c.

  The work vehicle 100 according to the present embodiment has the following features.

  As shown in FIG. 7, the first to fourth fixing bolts 66a to 66d are formed in the first to fourth mounting holes 52a to 52d (see FIG. 8) and the first to fourth screw holes 61a to 61d (see FIG. 11). Inserted from above, the first support member 41 and the second support member 42 are fixed. Therefore, the first support member 41 and the second support member 42 can be easily fixed and released from above the engine chamber 16. For this reason, as shown in FIG. 5, the exhaust gas processing device 25 and the first support member 41 integrated (hereinafter referred to as “processing device assembly 20”) are removed from or attached to the vehicle body. Work can be done easily.

  Further, as described above, the exhaust gas processing device 25 and the first support member 41 are fixed to each other by the U-shaped bolts 48 and 49 and the nuts 45h, 45i, 46h, and 46i. The operation of fixing the exhaust gas processing device 25 and the first support member 41 with these U-shaped bolts 48, 49 and nuts 45h, 45i, 46h, 46i is performed with the processing device assembly 20 removed from the vehicle body. Can do. For this reason, work can be performed easily. Further, the mounting holes 45d and 45e of the first support portion 45 and the mounting holes 46d and 46e of the second support portion 46 are tubular bodies with respect to the first to fourth mounting holes 52a to 52d of the second plate-like portion 52. 27 are provided at a distance in the axial direction. For this reason, the part in which the 1st-4th attachment holes 52a-52d are provided among the 2nd plate-shaped parts 52 does not become the hindrance of said operation | work. Furthermore, as described above, the recesses 45f and 45g are provided in the portion of the first support portion 45 located below the first mounting hole 52a and the second mounting hole 52b (see FIG. 4). Further, openings 46f and 46g are provided in a portion of the second support portion 46 located below the third attachment hole 52c and the fourth attachment hole 52d (see FIG. 9). For this reason, the tool can be easily brought close to the nuts 45h, 45i, 46h, 46i through the recesses 45f, 45g and the openings 46f, 46g. As a result, the exhaust gas processing device 25 can be easily attached to and detached from the first support member 41.

  Even when the processing device assembly 20 removed from the vehicle body is placed on the ground, the exhaust gas processing device 25 can be supported by the first support member 41 (see FIG. 5). That is, the first support member 41 can function as a support base for the exhaust gas treatment device 25. For this reason, it can suppress that the exhaust-gas processing apparatus 25 contacts the ground and is damaged. Further, the first connection port 28 of the exhaust gas processing device 25 protrudes downward from the tube body 27. However, since the exhaust gas processing device 25 is arranged at a position higher than the ground by the first support member 41, the first connection It is possible to suppress the mouth 28 from coming into contact with the ground and being damaged.

  The first to fourth mounting holes 52a to 52d and the first to fourth screw holes 61a to 61d are provided so as to be located outside the exhaust gas processing device 25 in a top view. For this reason, it is possible to prevent the exhaust gas processing device 25 from interfering with the work when attaching or removing the processing apparatus assembly 20.

  As shown in FIG. 8, a first recess 52 e is provided at the edge of the first support member 41. That is, the edge portion of the first support member 41 has a shape that is recessed between the first attachment hole 52 a and the second attachment hole 52 b of the first support member 41. For this reason, when working with respect to the apparatus arranged below the first support member 41, the first support member 41 is prevented from obstructing the work. For example, the operation can be easily performed on the cylinder head provided on the upper portion of the engine 21. A second recess 52 f is provided at the edge of the first support member 41. For this reason, when working with respect to the apparatus arranged below the first support member 41, the first support member 41 is prevented from obstructing the work. For example, the operation can be easily performed on the hydraulic pump 23. Further, a third recess 52 g is provided at the edge of the first support member 41. For this reason, it is suppressed that the 1st support member 41 interferes with the connection piping 37. FIG.

  As shown in FIG. 10, the connection pipe 37 is fixed to the second support member 42. For this reason, the processing apparatus assembly 20 can be detached from the second support member 42 and the connection pipe 37 in a state where the connection pipe 37 is fixed to the second support member 42. For this reason, the connection piping 37 does not interfere with the operation during the removal operation. Alternatively, it is not necessary to remove only the connection pipe 37 first. For this reason, work can be performed easily.

  The connection pipe 37 is fixed to the second support member 42 between the first end portion 37a and the vibration absorbing portion 37c. For this reason, the difference between the vibration from the second support member 42 and the vibration from the engine 21 can be absorbed by the vibration absorbing portion 37c. Thereby, it is suppressed that the connection piping 37 is damaged.

  As shown in FIG. 5, the lower end portion of the first connection port 28 is located above the bottom surface of the first support member 41. For this reason, when the processing apparatus assembly 20 is placed on the ground, the lower end portion of the first connection port 28 does not contact the ground. By this. It can further suppress that the 1st connection port 28 is damaged.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of invention. For example, the present invention can be applied to work vehicles other than hydraulic excavators.

  An apparatus different from the exhaust gas processing apparatus 25 may be used as the exhaust gas processing apparatus. For example, a selective reduction catalyst type device, an OC (oxidation catalyst) type device, or an LNT (NOx storage catalyst) type device may be used.

  The support mechanism 26 may be attached to a member other than the flywheel housing 22. For example, the exhaust gas processing device 25 may be attached to a part of the engine 21, another device attached to the engine 21, or a vehicle body frame.

  The number and detailed arrangement of the mounting holes, screw holes, and fixing bolts are not limited to those of the above-described embodiment, and may be appropriately changed according to conditions such as the shape and positional relationship of other members.

  In the above embodiment, the first support member 41 is fixed to the second support member 42, but the first support member 41 may be directly fixed to the flywheel housing 22. Alternatively, the first support member 41 may be fixed to a member other than the flywheel housing 22, such as the engine 21 or the body frame.

  The second end portion 37 b of the first connection pipe 37 may be connected to a component other than the engine 21. For example, the second end portion 37b may be connected to another exhaust gas processing device.

21 Engine 25 Exhaust gas treatment device 27 Tubing body 28 First connection port (connection port)
37 Connection piping (piping)
37a 1st end part 37b 2nd end part 37c Vibration absorption part 41 1st support member (attachment member)
42 Second support member (support)
48 1st U-shaped bolt (fixing member)
52a First mounting hole 52b Second mounting hole 61a First screw hole 61b Second screw hole 66a First fixing bolt 66b Second fixing bolt 100 Work vehicle

Claims (7)

Engine,
An exhaust gas processing apparatus that has a tube and a connection port that protrudes downward from the tube in a horizontal direction, and that processes exhaust gas from the engine;
Piping connected to the connection port;
A first attachment hole penetrating in the vertical direction and a second attachment hole penetrating in the vertical direction , disposed below the exhaust gas treatment device, and an attachment member to which the exhaust gas treatment device is attached;
A fixing member for fixing the exhaust gas treatment device and the mounting member;
A first screw hole provided at a position corresponding to the first mounting hole and a second screw hole provided at a position corresponding to the second mounting hole, and disposed below the mounting member; A support that supports the mounting member;
A first fixing bolt that is inserted into the first mounting hole and the first screw hole from above and fixes the mounting member and the support;
A second fixing bolt;
Equipped with a,
The first mounting hole is provided in a portion of the mounting member that is located outside the exhaust gas processing device in a top view,
The second mounting hole is provided in a portion of the mounting member that is located outside the exhaust gas processing device in a top view, and is disposed at a distance from the first mounting hole in the axial direction of the tubular body. And
The second fixing bolt is inserted into the second mounting hole and the second screw hole from above to fix the mounting member and the support body,
The edge of the mounting member has a shape recessed between the first mounting hole and the second mounting hole.
Work vehicle.   The pipe is fixed to the support;
The work vehicle according to claim 1.   An engine,
  An exhaust gas processing apparatus that has a tube and a connection port that protrudes downward from the tube in a horizontal direction, and that processes exhaust gas from the engine;
  Piping connected to the connection port;
  A first mounting hole penetrating in the vertical direction, disposed below the exhaust gas treatment device, and an attachment member to which the exhaust gas treatment device is attached;
  A fixing member for fixing the exhaust gas treatment device and the mounting member;
  A first screw hole provided at a position corresponding to the first mounting hole, a support body disposed below the mounting member and supporting the mounting member;
  A first fixing bolt that is inserted into the first mounting hole and the first screw hole from above and fixes the mounting member and the support;
With
  The pipe is fixed to the support;
Work vehicle. The first mounting hole is provided in a portion of the mounting member that is located outside the exhaust gas processing device in a top view.
The work vehicle according to claim 3 . A second fixing bolt;
The attachment member further has a second attachment hole penetrating in the vertical direction,
The second mounting hole is provided in a portion of the mounting member that is located outside the exhaust gas processing device in a top view, and is disposed at a distance from the first mounting hole in the axial direction of the tubular body. And
The support has a second screw hole provided at a position corresponding to the second mounting hole,
The second fixing bolt is inserted into the second mounting hole and the second screw hole from above to fix the mounting member and the support body,
The edge of the mounting member has a shape recessed between the first mounting hole and the second mounting hole.
The work vehicle according to claim 4 . The pipe is provided between a first end connected to the connection port, a second end connected to the engine or another component, and the first end and the second end. A vibration absorbing portion having a bellows-like shape,
The pipe is fixed to the support at a portion between the first end portion and the vibration absorbing portion.
The work vehicle according to any one of claims 2 to 5 . The lower end of the connection port is located above the bottom surface of the mounting member.
The work vehicle according to any one of claims 1 to 6 .

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