Work vehicles

Abstract

To provide a work vehicle that prevents dust from entering an engine room through a gap between a cover and a cabin.SOLUTION: A work vehicle includes a body frame having a front body and a rear body opposite to the front body, and a cab frame connected to the body frame so as to be rotatable around a rotating shaft provided at the rear body. The rear body includes a support frame that supports a rotating shaft and an engine room below the support frame. The cab frame can be switched between a closed state placed on the front body by rotating around the rotating shaft and an open state where the engine room is separated from the front body and exposed between the front body and the cab frame. The support frame has an abutment plate configured to abut the cab frame when the cab frame is in the closed state. The cab frame has a seal rubber configured to abut against the abutment plate when the cab frame is in the closed state.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a work vehicle. [Background technology]

[0002] Patent Document 1 shows a work vehicle with a cabin that can be opened and closed freely. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5314177 Summary of the Invention [Problem to be solved by the invention]

[0004] In the work vehicle of Patent Document 1, it is preferable to provide a gap between the cover covering the upper part of the engine room and the cabin in order to facilitate opening and closing of the cabin. However, there is a risk of dust entering through the gap. [Means for solving the problem]

[0005] A work vehicle according to a first aspect of the present disclosure includes a vehicle body frame having a vehicle body front portion and a vehicle body rear portion opposite the vehicle body front portion, and a cab frame connected to the vehicle body frame so as to be rotatable around a rotating shaft provided at the vehicle body rear portion. The vehicle body rear portion has a support frame that supports the rotating shaft, and an engine room below the support frame in a height direction along the height of the vehicle body frame. The cab frame is switchable between a closed state in which it is placed on the vehicle body front portion and an open state in which it is separated from the vehicle body front portion and exposes the engine room from between the vehicle body front portion and the cab frame by rotating around the rotating shaft. The support frame has an abutment plate configured to abut against the cab frame when the cab frame is in the closed state. The cab frame has a seal rubber configured to abut against the abutment plate when it is in the closed state. Effect of the Invention

[0006] According to the technology disclosed in the present application, for example, a work vehicle can be provided that prevents dust from entering the engine compartment through a gap between a cover and a cabin. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a side view of a work vehicle. [Diagram 2] FIG. 2 is a side view of the work vehicle when the cabin is rotated. [Diagram 3] FIG. 3 is a top view of the work vehicle. [Figure 4] FIG. 4 is a rear view of the work vehicle. [Diagram 5] FIG. 5 is a view of a portion of the work vehicle as viewed from the front end of the work vehicle toward the rear. [Figure 6] FIG. 6 is a side view of the engine and its surroundings. [Figure 7] FIG. 7 is an enlarged view of the sealing mechanism and its vicinity in FIG. [Figure 8] FIG. 8 is a bottom view of the cabin. [Figure 9] FIG. 9 is an enlarged view of the boundary portion between the cabin and the bonnet cover. [Figure 10] FIG. 10 is an enlarged view of the upper part of the exhaust port and the muffler cover. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the drawings showing embodiments thereof. In the drawings, the same reference numerals indicate corresponding or substantially identical components. <Embodiment> <Overall composition>

[0009] 1 to 4, a work vehicle 1, for example, a compact track loader, includes an exhaust system 10. The work vehicle 1 includes a vehicle body frame 2, a traveling device 3, a working device 4, and a cabin 5. The vehicle body frame 2 supports the traveling device 3, the working device 4, and the cabin 5. In the illustrated embodiment, the traveling device 3 is a crawler-type traveling device. Therefore, the traveling device 3 includes a driving wheel 31, driven wheels 32 and 33, and a roller 34. However, the traveling device 3 is not limited to a crawler-type traveling device. The vehicle body frame 2 has a vehicle body front part 2F and a vehicle body rear part 2R opposite to the vehicle body front part 2F. The traveling device 3 may be, for example, a front wheel / rear wheel traveling device, or a traveling device having front wheels and a rear crawler. The working device 4 includes a work equipment (bucket) 41 at the distal end of the working device 4. A proximal end of the working device 4 is attached to the vehicle body rear part 2R of the vehicle body frame 2. The working device 4 includes a pair of arm assemblies 42 for rotatably supporting a bucket 41 via a bucket pivot shaft 43. Each of the pair of arm assemblies 42 includes a lift link 44 and an arm 45.

[0010] The lift link 44 is rotatable relative to the vehicle body frame 2 around a fulcrum shaft 46. The arm 45 is rotatable relative to the lift link 44 around a joint shaft 47. The working device 4 further includes a plurality of arm cylinders 48 and at least one equipment cylinder 49. Each of the plurality of arm cylinders 48 is rotatably connected to the vehicle body frame 2 and the arm 45, and moves the lift link 44 and the arm 45 to lift and lower the bucket 41. The at least one equipment cylinder 49 is configured to tilt the bucket 41.

[0011] The cabin 5 is attached to the front body 2F of the body frame 2. The work vehicle 1 is provided with a front door 51 in front of the cabin 5, and a driver's seat 52 and an operating device (not shown) are provided inside the cabin 5. The interior space of the cabin 5 is defined by a cab frame 53. As shown in Figs. 2 and 3, the cab frame 53 is connected to the body frame 2 so as to be rotatable about rotational shafts RSL and RSR provided on the rear body 2R of the body frame 2. In Fig. 2, in order to clarify the structure of the body frame 2, the illustration is omitted except for the body frame 2, the cabin 5, and a seal structure 20 described later. In Figs. 1 to 3, a common rotational axis A defined by the rotational shafts RSL and RSR is shown. XC 1 and 2, the cab frame 53 can be switched between a closed state (see FIG. 1) in which it is placed on the vehicle front portion 2F and an open state (see FIG. 2) in which it is separated from the vehicle front portion 2F by rotating about the rotating shafts RSL and RSR.

[0012] In the embodiment of the present application, FB (Forward D F / backward D B ) means the front-rear direction (front direction / rear direction) as seen from the operator seated in the driver's seat 52 of the cabin 5. L , right direction D R , width direction D W The left, right, left and right directions are respectively seen from the operator's point of view. U , downward D D , height direction D H The directions refer to the upward, downward, and height directions as seen from the operator. The forward / backward, left / right (width), and up / down (height) directions of the work vehicle 1 respectively correspond to the forward / backward, left / right (width), and up / down (height) directions as seen from the operator.

[0013] In FIG. 3, one of the pair of arm assemblies 42 is provided on the left side of the cabin 5. The other of the pair of arm assemblies 42 is provided on the right side of the cabin 5. More specifically, one of the arm cylinders 48 and one of the arms 45 are provided on the left side of the cabin 5. The other of the arm cylinders 48 and the other of the arms 45 are provided on the right side of the cabin 5. FIG. 1 shows the left side of the work vehicle 1. As shown in FIGS. 3 and 4, the vehicle body frame 2 is substantially plane-symmetrical with respect to the vehicle body central plane M, and of the pair of arm assemblies 42, the arm assembly 42 provided on the left side of the vehicle body central plane M is shown as the first arm assembly 42L, and the arm assembly 42 provided on the right side of the vehicle body central plane M is shown as the second arm assembly 42R. The lift link 44 provided on the left side of the vehicle body central plane M is shown as the first lift link 44L, and the lift link 44 provided on the right side of the vehicle body central plane M is shown as the second lift link 44R. The arm 45 provided on the left side with respect to the vehicle body central plane M is shown as a first arm 45L, and the arm 45 provided on the right side with respect to the vehicle body central plane M is shown as a second arm 45R. The fulcrum shaft 46 provided on the left side with respect to the vehicle body central plane M is shown as a first fulcrum shaft 46L, and the fulcrum shaft 46 provided on the right side with respect to the vehicle body central plane M is shown as a second fulcrum shaft 46R. The joint shaft 47 provided on the left side with respect to the vehicle body central plane M is shown as a first joint shaft 47L, and the joint shaft 47 provided on the right side with respect to the vehicle body central plane M is shown as a second joint shaft 47R.

[0014] Referring to FIG. 1, the work vehicle 1 further includes an engine 6 and a heat exchanger 7 provided on the vehicle body rear portion 2R of the vehicle body frame 2. The engine 6 is configured to provide driving force to the traveling device 3 and the working device 4. The heat exchanger 7 includes a radiator that cools a coolant of the engine 6. Furthermore, preferably, the heat exchanger 7 includes an oil cooler configured to cool hydraulic oil used in the hydraulic system of the work vehicle 1 (e.g., the arm cylinder 48 and at least one tool cylinder 49). The work vehicle 1 includes a fan 71 for air-cooling the heat exchanger 7. The engine 6 and the heat exchanger 7 are arranged in a width direction D of the work vehicle 1. W3, the arm assembly 42 is disposed between the pair of arm assemblies 42.

[0015] The work vehicle 1 further includes a bonnet cover 8 for covering the heat exchanger 7. The bonnet cover 8 further covers the engine 6. An air suction port 8a for taking air into the cover 8 is provided on the upper surface of the bonnet cover 8. The work vehicle 1 further includes a rear bonnet cover 9 provided at the rear end of the body frame 2. The rear bonnet cover 9 can be opened and closed, allowing a maintenance technician to perform maintenance work on the engine 6, etc.

[0016] The exhaust system 10 includes an exhaust pipe 11, one end of which is connected to the engine 6, and an exhaust port 12 connected to the exhaust pipe 11. More specifically, the exhaust pipe 11 is connected to the engine 6 via an exhaust treatment device 61 configured to treat exhaust from the engine 6. The exhaust treatment device 61 includes, for example, a particulate removal filter. However, the exhaust treatment device 61 may also include a selective catalytic reduction device. Referring to FIG. 3, the exhaust system 10 is arranged in a width direction D of the work vehicle 1. W 42L and the vehicle body central plane M.

[0017] FIG. 4 shows a part of the work vehicle 1 from the front end of the work vehicle 1 to the rear D B 4 is a view seen toward the rear of the vehicle. In Fig. 4, illustrations are omitted other than the body frame 2, the engine 6, the exhaust treatment device 61, the exhaust system 10, the heat exchanger 7, the fan 71, and the bonnet cover 8. Referring to Fig. 4, the body frame 2 (vehicle rear portion 2R) includes a first inner wall 21L, a second inner wall 21R, a first outer wall 22L, a second outer wall 22R, a first rear wall 23L, a second rear wall 23R, a support frame 24, a bottom wall 25, a first track frame 28L, a second track frame 28R, a first mounting frame 29L, and a second mounting frame 29R.

[0018] The first inner wall 21L and the second inner wall 21R connect the support frame 24 and the bottom wall 25 and extend in the height direction D H The first outer wall 22L extends in the width direction D W21L and in the height direction D H The second outer wall 22R extends in the width direction D W 21R and faces the second inner wall 21R in the height direction D H The first inner wall 21L and the first outer wall 22L are located on the left side with respect to the vehicle body center plane M. The second inner wall 21R and the second outer wall 22R are located on the right side with respect to the vehicle body center plane M. The first inner wall 21L extends in the width direction D W The second inner wall 21R is located between the first outer wall 22L and the vehicle body center plane M in the width direction D. W 2. The first rear wall 23L connects the rear end of the first inner wall 21L to the rear end of the first outer wall 22L. The second rear wall 23R connects the rear end of the second inner wall 21R to the rear end of the second outer wall 22R. The bottom wall 25 connects the lower end of the first inner wall 21L to the lower end of the second inner wall 21R. The support frame 24 connects the upper end of the first inner wall 21L to the upper end of the second inner wall 21R. The support frame 24 is arranged in the height direction D H The support frame 24 faces the bottom wall 25. The support frame 24 has a first support portion 27L for rotatably supporting the rotating shaft RSL described above, and a second support portion 27R for rotatably supporting the rotating shaft RSR described above.

[0019] The first lift link 44L, the first arm assembly 42L, and the arm cylinder 48 that operates the first arm assembly 42L are arranged in the width direction D W The first lift link 44R, the second arm assembly 42R, and the arm cylinder 48 that operates the second arm assembly 42R are disposed between the first inner wall 21L and the first outer wall 22L at the width direction D. W A second fulcrum shaft 46R supporting the second lift link 44R is connected to the second inner wall 21R and the first outer wall 22L.

[0020] The first track frame 28L is attached to the lower end of the first inner wall 21L via a first mounting frame 29L. The second track frame 28R is attached to the lower end of the second inner wall 21R via a second mounting frame 29R. Driven wheels 32, 33 and rollers 34 are rotatably attached to the first track frame 28L and the second track frame 28R. The driving wheels 31 are supported by the first inner wall 21L and the second inner wall 21R. The engine 6 is supported by the bottom wall 25 via a damper (not shown). In FIG. 4, the crankshaft A of the engine 6 is rotated in a direction perpendicular to the axis of the shaft 31 in order to determine the orientation of the engine 6. XE The crankshaft A is XE is substantially on the vehicle body center plane M in the front-rear direction D FB extends to.

[0021] 6 is a side view of the periphery of the engine 6 shown in FIG. 5. In FIG. 6, the body frame 2 is omitted except for the support frame 24. The structure of the engine 6 is shown diagrammatically, and some of the structure of the engine 6 is omitted. As shown in FIG. 6, the heat exchanger 7, the fan 71, and the bonnet cover 8 are attached to the first inner wall 21L and the second inner wall 21R via the stays 30. In other words, the bonnet cover 8 is arranged in a height direction D along the height of the body frame 2. H The support frame 24 is provided on the vehicle body frame 2 at the rear end thereof. The support frame 24 is illustrated by a dotted line. With reference to Figures 2, 5 and 6, the support frame 24 has an L-shape bent downward at its front end. The support frame 24 has a through hole 24h, and the exhaust pipe 11 is disposed to pass through the through hole 24h.

[0022] Further, referring to FIGS. 5 and 6, the fan 71 is disposed above the engine D. U The heat exchanger 7 is located above the fan 71. U The bonnet cover 8 having the air suction port 8a is located above the heat exchanger 7. U5 and 6, the fan duct 72 is shown because some of the fan ducts 72 are omitted from the illustration, but in reality, the fan duct 72 is covered by the fan duct 72 and is not exposed to the engine room 62. The engine room 62 refers to a space surrounded by the cabin 5, the fan duct 72, the first inner wall 21L, the second inner wall 21R, the bottom wall 25, and the rear bonnet cover 9. In other words, the bonnet cover 8 covers the engine room 62, and the vehicle body rear part 2R is located in the height direction D along the height of the vehicle body frame 2. H In this embodiment, it can be said that the vehicle has an engine room 62 below the support frame 24. When the vehicle is in the open state as shown in Fig. 2, the lower part of the support frame 24 shown in Fig. 5 is exposed to the outside. That is, in the open state, the engine room 62 is exposed between the vehicle body front part 2F and the cab frame 53. The engine 6 and the exhaust treatment device 61 are provided in the engine room 62.

[0023] The exhaust treatment device 61 is disposed in the engine compartment 62 and in front of the engine 6. F5 and is connected to the engine 6 by a connecting pipe 63. The connecting pipe 63 is connected to the right end of the exhaust treatment device 61. As shown in FIG. 5, the air intake port of the exhaust pipe 11 is connected to the left end of the exhaust treatment device 61. An exhaust port 12 is provided on the opposite side of the air intake port of the exhaust pipe 11. The exhaust port 12 is fixed to the exhaust pipe 11 by a method such as press fitting, adhesive, or welding. That is, the exhaust pipe 11 has the exhaust port 12. As shown in FIG. 5 and FIG. 6, the exhaust port 12 is protected by being covered by the muffler cover 13. That is, the exhaust system 10 includes the muffler cover 13. The muffler cover 13 is fixed to the bonnet cover 8 by bolts B1, B2, etc. As shown in FIG. 3 and FIG. 6, the exhaust port 12 faces the air suction port 8a.

[0024] 5 and 6, the work vehicle 1 includes a sealing mechanism 20. The sealing mechanism 20 has an abutment plate 26 and a seal rubber 56. The abutment plate 26 is a part of the support frame 24. The seal rubber 56 is a part of the cab frame 53. In addition, in FIG. 5 and FIG. 6, the components belonging to the cabin 5 are illustrated by two-dot chain lines. The abutment plate 26 is configured to abut against the cab frame 53 when the cab frame 53 is in the closed state. The abutment plate 26 is attached to the remaining frame of the support frame 24 via a plurality of bolts B3. The seal rubber 56 is configured to abut against the abutment plate 26 when the closed state is reached. Referring to FIG. 5, the exhaust treatment device 61 is configured to be fixed to the central axis A of the rotating shafts RSL and RSR. XC Width direction D along W The seal rubber 56 and the contact plate 26 extend in the width direction D W The exhaust treatment device 61 extends in the height direction D of the seal rubber 56 and the contact plate 26. H The seal rubber 56 is located below the W and the length W1 of the abutment plate 26 in the width direction D W The length W2 of the exhaust treatment device 61 in the width direction D W is longer than the length W0.

[0025] 7 is an enlarged view of the sealing mechanism 20 and its surroundings in FIG. 6. The abutment plate 26 is attached with a bolt B3 and is extended in the height direction D H A base end portion 26B extending in the height direction D H The sealing mechanism 20 further includes an elastic body 27 provided at the tip of the distal end portion 26D, which is inclined forward from the proximal end portion 56a. This allows the abutment plate 26 to be easily attached to the remaining frame of the support frame 24 and to be easily abutted against the seal rubber 56. The sealing mechanism 20 further includes an elastic body 27 provided at the tip of the distal end portion 26D. This prevents the seal rubber 56 from being damaged by contact with the abutment plate 26. FIG. 8 is a bottom view of the cabin 5. In FIG. 8, the abutment plate 26, the first support portion 27L, and the second support portion 27R are illustrated by two-dot chain lines. Referring to FIG. 8, the seal rubber 56 includes a base end portion 56a configured to abut against the abutment plate 26, and a rearward end portion D extending from the base end portion 26a. B By providing the extension portion 56b, the contact area of ​​the seal rubber 56 with the cab frame 53 is increased, making it difficult for the seal rubber 53 to peel off from the cab frame 53.

[0026] 9 is an enlarged view of the boundary portion between the cabin 5 and the bonnet cover 8. Referring to FIG. 9, in the work vehicle 1, there is a seal rubber 56 and a contact plate 26, and the seal rubber 56 and the contact plate 26 are disposed in the height direction D. HA first gap G1 is provided between the vehicle body frame 2 and the cab frame 53 above the first support portion 27L. When rotating the cabin 5, the worker can lift the cabin 5 by inserting his / her hand into the first gap G1. With reference to Figs. 3, 8, and 9, the work vehicle 1 includes a cover CV that closes the gap between the cabin 5 and the bonnet cover 8 between the first support portion 27L and the second support portion 27R. The cover CV is made of cloth and is configured to bend when the cabin 5 is rotated. With reference to Figs. 2 and 6 to 8, the cabin 5 has outer periphery seals 54L, 54R on the outer periphery of its bottom. The outer periphery seals 54L, 54R are provided so as to abut against the extension portions 21LE and 21RE that extend from the first inner wall 21L and the second inner wall 21R in Fig. 5 toward the inside of the vehicle body in the closed state. Therefore, the first gap G1 is provided in the area surrounded by the dotted line in Fig. 8. The outside air entering through the first gap G1 reaches the seal rubber 56 and the contact plate 26. W and the length W1 of the abutment plate 26 in the width direction D W The length W2 of the exhaust treatment device 61 in the width direction D W Since the length W0 of the seal rubber 56 and the contact plate 26 is longer than the length W0 of the H Dust from the outside air is less likely to reach the exhaust treatment device 61 located below the exhaust gas treatment device 61. More specifically, while dust from the outside air falls as shown by flow F1 in Fig. 5, dust heading toward the inside of the vehicle as shown by flow F2 is blocked by the sealing mechanism 20. This can reduce the risk of the dust burning due to the high heat generated by the exhaust treatment device 61.

[0027] FIG. 10 is an enlarged view of the upper part of the exhaust port 12 and the muffler cover 13 shown in FIG. 6. Referring to FIG. 10, the exhaust port 12 has a long hole pipe shape. The bonnet cover 8 has an opening 8h. Referring to FIG. 6 and FIG. 10, the exhaust pipe 11 (exhaust port 12) communicates with the outside of the work vehicle 1 through the opening 8h. Note that a part of the exhaust port 12 may be disposed closer to the engine room 62 side than the opening 8h. A second gap G2 is provided between the opening 8h and the exhaust pipe 11. As shown in FIG. 6, the opening 8h communicates with the engine room 62 through the through hole 24h and the gap 65. However, as shown in FIG. 6, the outside air entering from the second gap G2 reaches the seal rubber 56 and the abutment plate 26. Therefore, at least a part of the dust entering from the opening 8h is blocked by the seal mechanism 20. This can reduce the risk of the dust burning due to the exhaust treatment device 61 that generates high heat. <Actions and Effects of the Embodiments>

[0028] In the work vehicle 1 according to this embodiment, the support frame 24 has a contact plate 26 configured to come into contact with the cab frame 53 when the cab frame 53 is in the closed state. The cab frame 53 has a seal rubber 56 configured to come into contact with the contact plate 26 when the cab frame 53 is in the closed state. This enables the work vehicle 1 to prevent dust from entering through the gap between the bonnet cover 8 and the cabin 5.

[0029] In this application, the term "comprises" and its derivatives are open-ended terms that describe the presence of elements and do not exclude the presence of other elements not listed. This also applies to the terms "have", "include" and their derivatives.

[0030] The terms "member," "part," "element," "body," and "structure" may have multiple meanings, such as a single part or multiple parts.

[0031] Ordinal numbers such as "first" and "second" are merely terms used to identify components and do not have any other meaning (such as a particular order). For example, the presence of a "first element" does not imply the presence of a "second element," and the presence of a "second element" does not imply the presence of a "first element."

[0032] Words expressing degree, such as "substantially," "about," and "approximately," may mean a reasonable deviation that does not significantly change the final result, unless otherwise specified in the embodiment. All numerical values ​​described in this application may be interpreted to include words such as "substantially," "about," and "approximately."

[0033] In this application, the phrase "at least one of A and B" should be interpreted as including A only, B only, and both A and B.

[0034] It is apparent that various changes and modifications of the present invention are possible in light of the above disclosure, and therefore, the present invention may be practiced otherwise than as specifically disclosed herein without departing from the spirit and scope of the present invention.

Claims

1. a vehicle body frame having a vehicle front portion and a vehicle rear portion opposite the vehicle front portion; a cab frame connected to the vehicle body frame so as to be rotatable about a rotary shaft provided at the rear of the vehicle body; Equipped with The rear of the vehicle body is A support frame that supports the rotating shaft; an engine room is provided below the support frame in a height direction along the height of the vehicle body frame, the cab frame is switchable between a closed state in which it is placed on the front portion of the vehicle body and an open state in which it is separated from the front portion of the vehicle body and exposes the engine compartment between the front portion of the vehicle body and the cab frame by rotating around the rotating shaft, The support frame has an abutment plate configured to abut against the cab frame when the cab frame is in the closed state, The cab frame has a seal rubber configured to abut against the abutment plate when the cab frame is in the closed state. Work vehicle.

2. a first gap is provided between the vehicle body frame and the cab frame at a position rearward of the seal rubber and the contact plate; The work vehicle according to claim 1 , wherein outside air entering through the first gap reaches the seal rubber and the contact plate.

3. an engine provided in the engine room; an exhaust treatment device provided in the engine compartment and configured to treat exhaust from the engine; Further equipped with The exhaust treatment device extends in a width direction along a central axis of the rotating shaft, The seal rubber and the contact plate extend in the width direction, the exhaust treatment device is located below the seal rubber and the contact plate in the height direction, The length of the seal rubber and the contact plate in the width direction is longer than the length of the exhaust treatment device in the width direction. A work vehicle according to claim 1.

4. an engine provided in the engine room; an exhaust treatment device provided in the engine room and configured to treat exhaust gas from the engine; Further equipped with The exhaust treatment device extends in a width direction along a central axis of the rotating shaft, The seal rubber and the contact plate extend in the width direction, the exhaust treatment device is located below the seal rubber and the contact plate in the height direction, The length of the seal rubber and the contact plate in the width direction is longer than the length of the exhaust treatment device in the width direction. The work vehicle according to claim 2.

5. A bonnet cover that covers the engine compartment; an exhaust pipe connected to the exhaust treatment device; Further equipped with The bonnet cover has an opening, The exhaust pipe communicates with the outside of the work vehicle through the opening, a second gap is provided between the opening and the exhaust pipe, The work vehicle according to claim 3 , wherein outside air entering through the second gap reaches the seal rubber and the contact plate.

6. A bonnet cover that covers the engine compartment; an exhaust pipe connected to the exhaust treatment device; Further equipped with The bonnet cover has an opening, The exhaust pipe communicates with the outside of the work vehicle through the opening, a second gap is provided between the opening and the exhaust pipe, The work vehicle according to claim 4 , wherein outside air entering through the second gap reaches the seal rubber and the contact plate.

7. The abutment plate is A base end portion extending in the height direction; A terminal portion extending in a direction inclined forward from the height direction; A work vehicle according to any preceding claim, comprising:

8. The work vehicle according to claim 7 , further comprising an elastic body provided at a tip of the end portion.

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