Work vehicle

Abstract

To provide a work vehicle configured such that a vertical angle of a steering handle (support part) is fixed by an angle setting cylinder with fewer rattling.SOLUTION: A work vehicle includes: a support part 28 capable of changing an angle in a vertical direction; a steering handle 15 attached to the support part 28; and an angle setting cylinder 31 attached to extend between the support part 28 and a fixed part 33. The work vehicle includes: first openings 31d, 31e provided in the angle setting cylinder 31; second openings 32a, 33a provided in at least one of the support part 28 and the fixed part 33; pins 34; and fixing members 30. The pins 34 are inserted to extend across the first openings 31d, 31e and the second openings 32a, 33a therein, and are fixed by the fixing members 30 to different portions from the second openings 32a, 33a.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to the configuration of a steering handle for steering a work vehicle. [Background technology]

[0002] As disclosed in Patent Document 1, some work vehicles have a steering handle attached to a support part that is arranged so that the angle can be changed up and down around an axis that runs in the left-right direction, and an angle setting cylinder attached between the support part and a fixed part of the machine body.

[0003] The operator can change the up / down angle of the control handle (support part) by operating the angle setting cylinder to an extendable state, which causes the angle setting cylinder to extend and retract accordingly.The operator can fix the up / down angle of the control handle (support part) by operating to fix the extension / retraction of the angle setting cylinder. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2012-11800 A Summary of the Invention [Problem to be solved by the invention]

[0005] Multipurpose work vehicles such as that disclosed in Patent Document 1 often travel through rough terrain or mountainous areas, and the vehicle body may shake significantly while traveling. As a result, if there is any play in the fixing of the up and down angle of the steering handle (support part) by the angle setting cylinder, the vibration of the steering handle (support part) will increase, which may lead to damage to the steering handle (support part), etc., so there is a demand for reducing play in the fixing of the up and down angle of the steering handle (support part) by the angle setting cylinder.

[0006] The present invention aims to configure a work vehicle so that the vertical angle of a steering handle (support part) is fixed by an angle setting cylinder with minimal rattle. [Means for solving the problem]

[0007] The work vehicle of the present invention is provided with a support section provided so that the angle can be changed up and down around an axis along the left-right direction, a control handle attached to the support section, a fixed section provided in front of the support section, and an angle setting cylinder attached across the support section and the fixed section, which is extendable and retractable and whose extension can be fixed and released, and by operating the angle setting cylinder to extend or retract, the up-down angle of the support section is changed, and by fixing the extension or retraction of the angle setting cylinder, the up-down angle of the support section is fixed, and In at least one of the above, a first opening provided in the angle setting cylinder, a second opening provided in at least one of the support part and the fixed part, a pin, and a fixing member capable of fixing the pin to a portion of at least one of the support part and the fixed part that is different from the second opening, are provided, and the pin is inserted across the first opening and the second opening, and is fixed by the fixing member to a portion of at least one of the support part and the fixed part that is different from the second opening, thereby attaching the angle setting cylinder to at least one of the support part and the fixed part.

[0008] In a work vehicle, when an angle setting cylinder is attached across a support part to which a steering handle is attached and a fixed part provided in front of the support part, the angle setting cylinder and the support part are often attached via a pin, and the angle setting cylinder and the fixed part are often attached via a pin. In this configuration, it is thought that rattles are likely to occur at the attachment portions between the angle setting cylinder and the support portion, and between the angle setting cylinder and the fixed portion.

[0009] According to the present invention, the angle setting cylinder and the support part (fixed part) are attached by inserting a pin through the first opening of the angle setting cylinder and the second opening of the support part (fixed part). In this case, by increasing the precision of the pin, the first opening, and the second opening, rattle is reduced in at least one of the attachment portion between the angle setting cylinder and the support portion and the attachment portion between the angle setting cylinder and the fixed portion.

[0010] As described above, in a configuration in which a pin is inserted across the first opening of the angle-setting cylinder and the second opening of the support part (fixed part), the pin needs to be fixed so that it does not come out. As a pin fixing structure, for example, a threaded part is formed at the tip of the pin, and a fixing member such as a nut is attached to the threaded part of the pin, so that the pin is fixed so that it does not come out. However, in this fixing structure, the outer diameter of the pin varies between the main body and the tip (threaded portion), which raises concerns about a decrease in the strength of the pin and a decrease in the accuracy of the pin.

[0011] According to the present invention, the pin is fixed by the fixing member to a portion of the support part (fixing part) that is different from the second opening, so there is no need to form a threaded portion at the tip of the pin. This allows the entire pin to be formed to have the same outer diameter, so there is no decrease in the strength of the pin and the precision of the pin can be easily improved.

[0012] As described above, according to the present invention, in a configuration in which the up and down angle of the steering handle (support part) is fixed by an angle setting cylinder, the accuracy between the pin and the first opening and the second opening can be easily increased while avoiding a decrease in the strength of the pin, thereby reducing rattling in the attachment part between the angle setting cylinder and the support part (fixed part). By reducing play in the attachment portion between the angle setting cylinder and the support portion (fixed portion), vibration of the control handle (support portion) is reduced, and damage to the control handle (support portion) and the like is prevented.

[0013] In the present invention, it is preferable that the first opening, the second opening, the pin, and the fixing member are provided in both the attachment portion between the angle setting cylinder and the support portion and the attachment portion between the angle setting cylinder and the fixing portion.

[0014] According to the present invention, rattle is suppressed in both the mounting portion between the angle setting cylinder and the support portion and the mounting portion between the angle setting cylinder and the fixed portion, which is advantageous in suppressing vibration of the control handle (support portion) and in preventing damage to the control handle (support portion), etc.

[0015] In the present invention, it is preferable that an attachment portion is provided attached to the pin, and that the attachment portion is fixed by the fixing member to a portion of at least one of the support portion and the fixing portion that is different from the second opening.

[0016] According to the present invention, the mounting portion is attached to the pin. With the pin inserted across the first opening of the angle-setting cylinder and the second opening of the support portion (fixed portion), the mounting portion of the pin is fixed to the support portion (fixed portion) by a fixing member, thereby fixing the pin. This makes it easy to obtain a configuration in which the pin is fixed to a portion of the support portion (fixing portion) that is different from the second opening portion.

[0017] In the present invention, it is preferable that the support portion extends rearward from the axis, and the angle setting cylinder is attached to a portion of the support portion rearward of the axis.

[0018] According to the present invention, in a configuration in which the support part extends rearward from the axis and the operation handle is attached to the support part, the angle setting cylinder is attached to a portion of the support part that is rearward of the axis, so that even a relatively long angle setting cylinder can be easily attached across the support part and the fixed part.

[0019] In the present invention, it is preferable that an operating section that can fix and release the extension and retraction of the angle setting cylinder and that can be manually operated is provided at the end of the angle setting cylinder on the support section side.

[0020] The angle setting cylinder is often locked and unlocked by a driver seated in a driver's seat provided behind the steering wheel. According to the present invention, the operating unit for fixing and releasing the angle setting cylinder is provided at the end of the angle setting cylinder on the support side, in a position close to the driver's seat. This allows the driver sitting in the driver's seat to easily operate the operating unit of the angle setting cylinder, thereby improving operability.

[0021] In the present invention, it is preferable that the angle setting cylinder is provided below the support portion, and the operating portion extends downward from the angle setting cylinder.

[0022] According to the present invention, since the angle setting cylinder is provided below the support portion, the number of members provided above the support portion is reduced, and therefore the forward visibility of the driver seated in the driver's seat is improved.

[0023] According to the present invention, when the angle setting cylinder is provided below the support part, the operating part extends downward from the angle setting cylinder, which is advantageous in that it allows the driver sitting in the driver's seat to easily operate the operating part of the angle setting cylinder, and is advantageous in terms of improving operability. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] FIG. [Figure 4]FIG. 10 is a vertical cross-sectional rear view of the attachment portion between the angle setting cylinder and the support portion (bracket). [Figure 5] FIG. 10 is a vertical cross-sectional rear view of the attachment portion between the angle setting cylinder and the support portion (bracket). DETAILED DESCRIPTION OF THE INVENTION

[0025] Figures 1 to 5 show a multipurpose work vehicle, which is an example of a work vehicle, and in Figures 1 to 5, F indicates the forward direction, B indicates the backward direction, U indicates the upward direction, D indicates the downward direction, R indicates the right direction, and L indicates the left direction.

[0026] (Overall configuration of the work vehicle) As shown in Figure 1, right and left front wheels 1 are provided at the front of the machine body 3, and right and left rear wheels 2 are provided at the rear of the machine body 3, and the machine body 3 is supported by the front wheels 1 and the rear wheels 2. The machine body 3 has a floor frame 4, a rope frame 5, a rear frame 6, a lower frame 7, etc.

[0027] A floor frame 4 is provided at the bottom of the fuselage 3, and a driver's seat 8 and a passenger seat 9 are provided on the floor frame 4 side by side in the left-right direction. A ROP frame 5 is connected to the floor frame 4 so as to surround the driver's seat 8 and the passenger seat 9.

[0028] Right and left doors 10 are attached so as to be able to open and close to the right part 5a and left part 5b of the ROPs frame 5. A rear frame 6 and a lower frame 7 are connected to the rear part of the ROPs frame 5 and extend rearward, and a cargo bed 11 is provided on the rear frame 6.

[0029] (Configuration of the travel transmission system) As shown in Fig. 1, an engine 12, a continuously variable transmission 13, a transmission case (not shown), and rear wheels 2 are mounted on a lower frame 7. Inside the transmission case, there are provided a gear-type auxiliary transmission (not shown) capable of shifting to two forward speeds and one reverse speed, a rear wheel differential (not shown), and a front wheel transmission (not shown).

[0030] The power of the engine 12 is transmitted to the continuously variable transmission 13 where the speed is changed, transmitted from the continuously variable transmission 13 to the auxiliary transmission where the speed is changed, transmitted from the auxiliary transmission to the rear wheel differential device, and transmitted from the rear wheel differential device to the rear wheels 2. The power branched between the auxiliary transmission and the rear wheel differential device is transmitted to the front wheels 1 via the front wheel transmission device.

[0031] When the front wheel transmission is operated to the four-wheel drive state, power branched between the sub-transmission and the rear wheel differential is transmitted to the front wheels 1, resulting in a four-wheel drive state in which the front wheels 1 and the rear wheels 2 are driven. When the front wheel transmission is operated to the two-wheel drive state, power is cut off at the front wheel transmission, resulting in a two-wheel drive state in which the rear wheels 2 are driven.

[0032] (Configuration of the front of the driver's seat 8 and passenger seat 9) - 1 2, the first horizontal frame 21 is provided at a position higher than the floor frame 4 and is connected along the left-right direction across the right section 5a and left section 5b of the ROPs frame 5. The second horizontal frame 22 is provided at a position higher than the first horizontal frame 21 and is connected along the left-right direction across the right section 5a and left section 5b of the ROPs frame 5.

[0033] The right and left vertical frames 24 are connected in the up-down direction between the left portion of the first horizontal frame 21 and the left portion of the second horizontal frame 22, and are provided in front of the driver's seat 8. The third horizontal frame 23, which is channel-shaped in plan view, is connected in the left-right direction between the right portion 5a of the ROPs frame 5 and the right vertical frame 24.

[0034] A base member 20 is provided, and the control handle 15, the gear shift lever 16, the parking lever 17, and the switching lever 18 are attached to the base member 20. The base member 20 is attached to a vertical frame 24.

[0035] As a result, the steering handle 15, the gear shift lever 16, the parking lever 17, and the switching lever 18 are attached to the vertical frame 24 via the base member 20, and are provided in front of the driver's seat 8.

[0036] As shown in Figure 1, an operation panel 14 made of synthetic resin is attached to a first horizontal frame 21, a second horizontal frame 22, and a third horizontal frame 23, and a steering handle 15, a gear shift lever 16, a parking lever 17, and a switching lever 18 pass through openings in the operation panel 14 and extend outside the operation panel 14.

[0037] As shown in FIG. 2, an accelerator pedal 25 and a brake pedal 26 are provided below the left portion of the operation panel 14. Two auxiliary handles 19 are provided side by side in the left-right direction at the center and right (in front of the passenger seat 9) of the operation panel 14. With the operation panel 14 sandwiched between the third horizontal frame 23 and the auxiliary handles 19, the third horizontal frame 23, the operation panel 14, and the auxiliary handles 19 are fastened together and connected by bolts.

[0038] (Configuration of the front of the driver's seat 8 and passenger seat 9) - 2 1 and 2, the continuously variable transmission 13 is configured as a belt-type continuously variable transmission. When the rotation speed of the engine 12 increases as a result of depressing the accelerator pedal 25, the continuously variable transmission 13 is automatically operated to a higher speed. When the rotation speed of the engine 12 decreases as a result of releasing the accelerator pedal 25, the continuously variable transmission 13 is automatically operated to a lower speed.

[0039] The front wheels 1 are steered using a steering handle 15. A shift lever 16 operates the auxiliary transmission in the transmission case to two forward speeds and one reverse speed. A selector lever 18 operates the front wheel transmission to four-wheel drive or two-wheel drive, and the rear wheel differential to differential operation or differential lock.

[0040] The vehicle is provided with brakes (not shown) that can brake the front wheels 1 and rear wheels 2, and the brakes are operated to a braking state by stepping on the brake pedal 26. The vehicle is also provided with a parking brake device (not shown), and the parking brake device is operated by operating the parking lever 17, and the brakes are maintained in a braking state.

[0041] (Support structure of the steering handle 15) 3, a support base 27 is connected to the base member 20 and extends obliquely upward and rearward. A support portion 28 is attached to the support base 27 so that its angle can be changed up and down around an axis P1 along the left-right direction, and extends rearward from the axis P1. A synthetic resin cover 29 is attached to the support portion 28.

[0042] The steering handle 15 is attached to the support part 28. A steering shaft (not shown) is connected between the steering handle 15 and a steering mechanism (not shown) of the front wheels 1. When the steering handle 15 is operated, the operation of the steering handle 15 is transmitted to the steering mechanism via the steering shaft, and the front wheels 1 are steered.

[0043] Bracket 32 ​​is connected downward to the lower part of the support part 28 at a portion rearward of axis P1 (toward the steering handle 15). Bracket 33 (corresponding to the fixed part) is connected downward to the lower part of the support base 27 at a portion forward of axis P1.

[0044] An angle setting cylinder 31 is provided. The angle setting cylinder 31 is a gas damper having a piston rod 31a and a cylinder 31b, and is extendable and retractable. An end of the piston rod 31a of the angle setting cylinder 31 is attached to a bracket 32, and an end of the cylinder 31b of the angle setting cylinder 31 is attached to a bracket 33.

[0045] As a result, the angle setting cylinder 31 is provided below the support base 27 and the support portion 28. The attachment portion of the angle setting cylinder 31 to the support portion 28 (bracket 32) is located rearward (toward the operating handle 15) of the axis P1. The attachment portion of the angle setting cylinder 31 to the support base 27 (bracket 33) is located forward of the axis P1.

[0046] In the angle setting cylinder 31, an operating lever 31c (corresponding to the operating part) is provided at the end of the piston rod 31a and extends downward. In the state shown in Figure 3, the operating lever 31c is operated to fixed position A1, and the extension and contraction of the angle setting cylinder 31 is fixed. As a result, the up and down angle of the operation handle 15 (support part 28) is fixed by the angle setting cylinder 31.

[0047] When the operating lever 31c of the angle setting cylinder 31 is operated to a release position A2 in front of the fixed position A1, the angle setting cylinder 31 is released from the extension / retraction lock, and the angle setting cylinder 31 becomes extendable.

[0048] This allows the driver seated in the driver's seat 8 to change the up-down angle of the steering handle 15 (support portion 28) around the axis P1 while holding the steering handle 15. After changing the up-down angle of the steering handle 15 (support portion 28), the driver operates the operating lever 31c of the angle setting cylinder 31 to the fixed position A1 to fix the up-down angle of the steering handle 15 (support portion 28).

[0049] (Structure of the attachment portion between the angle setting cylinder 31 and the support portion 28 (bracket 32), and structure of the attachment portion between the angle setting cylinder 31 and the support base 27 (bracket 33)) - 1 3, 4, and 5, an opening 31d (corresponding to the first opening) is provided at the end of the piston rod 31a of the angle setting cylinder 31. An opening 31e (corresponding to the first opening) is provided at the end of the cylinder 31b of the angle setting cylinder 31.

[0050] Brackets 32 and 33 are formed by bending a plate material into a channel shape. Openings 32a and 33a (corresponding to second openings) are provided at the bottom of brackets 32 and 33. Openings 32b and 33b are provided at the top of brackets 32 and 33, and nuts 32c and 33c are connected to the openings 32b and 33b.

[0051] A pin 34 is provided. A flat mounting portion 35 is connected to the pin 34, and an opening 35a is provided in the mounting portion 35. Two sets of the pin 34 and the mounting portion 35 are provided.

[0052] (Structure of the attachment portion between the angle setting cylinder 31 and the support portion 28 (bracket 32), and structure of the attachment portion between the angle setting cylinder 31 and the support base 27 (bracket 33))-2 As shown in FIGS. 3, 4 and 5, at the attachment portion between the angle setting cylinder 31 and the support portion 28 (bracket 32), the end of the piston rod 31a of the angle setting cylinder 31 is inserted into the position of the opening 32a of the bracket 32.

[0053] A pin 34 is inserted through the opening 31d of the piston rod 31a of the angle setting cylinder 31 and the opening 32a of the bracket 32, and the piston rod 31a of the angle setting cylinder 31 and the bracket 32 ​​are attached.

[0054] The bolt 30 (corresponding to the fixing member) is inserted from the opening 35a of the mounting portion 35 into the opening 32b of the bracket 32 ​​and the nut 32c, and then tightened. As a result, the pin 34 and the mounting portion 35 are fixed to a part of the bracket 32 ​​(support portion 28) other than the opening 32a.

[0055] In the attachment portion between the angle setting cylinder 31 and the support base 27 (bracket 33), as described above, the end of the cylinder 31b of the angle setting cylinder 31 is inserted into the position of the opening 33a of the bracket 33. The pin 34 is inserted through the opening 31e of the cylinder 31b of the angle setting cylinder 31 and the opening 33a of the bracket 33, and the cylinder 31b of the angle setting cylinder 31 and the bracket 33 are attached.

[0056] The bolt 30 is inserted from the opening 35a of the mounting portion 35 into the opening 33b of the bracket 33 and the nut 33c, and then tightened. This fixes the pin 34 and the mounting portion 35 to a part of the bracket 33 that is different from the opening 33a.

[0057] In the above configuration, the inner diameters of the openings 32a, 33a of the brackets 32, 33, the inner diameter of the opening 31d of the piston rod 31a of the angle setting cylinder 31, the inner diameter of the opening 31e of the cylinder 31b of the angle setting cylinder 31, and the outer diameter of the pin 34 are machined with high precision, thereby reducing rattle in the attachment portion between the angle setting cylinder 31 and the support portion 28 (bracket 32). Rattle in the attachment portion between the angle setting cylinder 31 and the support base 27 (bracket 33) is also reduced. The inner diameters of the openings 33b, 32b of the brackets 32, 33 and the inner diameter of the opening 35a of the attachment portion 35 do not need to be machined with high precision.

[0058] (First Alternative Embodiment of the Invention) The configurations shown in Figures 4 and 5 may be used for the attachment portion between the angle setting cylinder 31 and the support portion 28 (bracket 32), but may not be used for the attachment portion between the angle setting cylinder 31 and the support base 27 (bracket 33).

[0059] (Second Alternative Embodiment of the Invention) The configurations shown in Figures 4 and 5 may be used for the attachment portion between the angle setting cylinder 31 and the support base 27 (bracket 33), but may not be used for the attachment portion between the angle setting cylinder 31 and the support portion 28 (bracket 32).

[0060] (Third Alternative Embodiment of the Invention) The piston rod 31a of the angle setting cylinder 31 may be attached to a bracket 33, and the cylinder 31b of the angle setting cylinder 31 may be attached to a bracket 32.

[0061] (Correspondence to claims)-1 It is provided with a support part 28 that is arranged so that the angle can be changed up and down around an axis P1 along the left-right direction, a control handle 15 attached to the support part 28, and a fixed part (bracket 33) arranged in front of the support part 28.

[0062] An angle setting cylinder 31 is provided which is attached across the support part 28 and the fixed part (bracket 33), is extendable, and can be fixed and released from extension. By operating the angle setting cylinder 31 to extend or retract, the up-down angle of the support part 28 is changed, and by fixing the extension of the angle setting cylinder 31, the up-down angle of the support part 28 is fixed.

[0063] At least one of the attachment portions between the angle setting cylinder 31 and the support portion 28 and the attachment portion between the angle setting cylinder 31 and the fixed portion (bracket 33) is provided with a first opening (openings 31d, 31e) provided in the angle setting cylinder 31, a second opening (openings 32a, 33a) provided in at least one of the support portion 28 and the fixed portion (bracket 33), a pin 34, and a fixing member (bolt 30) capable of fixing the pin 34 to a portion other than the second opening (openings 32a, 33a) in at least one of the support portion 28 and the fixed portion (bracket 33).

[0064] The pin 34 is inserted through the first opening (openings 31d, 31e) and the second opening (openings 32a, 33a) and fixed to a portion of at least one of the support part 28 and the fixed part (bracket 33) other than the second opening (openings 32a, 33a) by a fixing member (bolt 30), thereby attaching the angle setting cylinder 31 to at least one of the support part 28 and the fixed part (bracket 33).

[0065] The mounting portion 35 is attached to the pin 34. The mounting portion 35 is fixed by a fixing member (bolt 30) to a portion of at least one of the support portion 28 and the fixing portion (bracket 33) that is different from the second openings (openings 32a, 33a).

[0066] (Correspondence to claims)-2 Both the mounting portion between the angle setting cylinder 31 and the support portion 28 and the mounting portion between the angle setting cylinder 31 and the fixed portion (bracket 33) are provided with a first opening (openings 31d, 31e), a second opening (openings 32a, 33a), a pin 34, and a fixing member (bolt 30).

[0067] (Correspondence to claims) - 3 The support portion 28 extends rearward from the axis P1. The angle setting cylinder 31 is attached to a portion of the support portion 28 rearward of the axis P1.

[0068] An operating section (operating lever 31c) that can fix and release the extension and retraction of the angle setting cylinder 31 and can be manually operated is provided at the end of the angle setting cylinder 31 on the support section 28 side. The angle setting cylinder 31 is provided below the support portion 28. An operating portion (operating lever 31c) extends downward from the angle setting cylinder 31. [Industrial Applicability]

[0069] The present invention can be applied not only to work vehicles with front wheels 1 and rear wheels 2, but also to work vehicles with front wheels 1 and rear crawler running devices (not shown), and also to work vehicles that do not have front wheels 1 and rear wheels 2 but have right and left crawler running devices. [Explanation of symbols]

[0070] 15 Control handle 28 Support part 31 Angle setting cylinder 31c Operating lever (operating part) 31d opening (1st opening) 31e Opening (1st opening) 32a opening (second opening) 33a opening (second opening) 30 bolts (fixing member) 33 Fixed part 34-pin 35 Mounting part P1 axis center

Claims

1. a support part provided around an axis along the left-right direction so that the angle can be changed up and down; A control handle attached to the support; a fixing portion provided in front of the support portion; an angle setting cylinder attached across the support portion and the fixed portion, which is extendable and whose extension can be fixed and released; The angle setting cylinder is operated to extend or retract, thereby changing the vertical angle of the support part, and the extension or retraction of the angle setting cylinder is fixed, thereby fixing the vertical angle of the support part. At least one of an attachment portion between the angle setting cylinder and the support portion and an attachment portion between the angle setting cylinder and the fixed portion is provided with a first opening provided in the angle setting cylinder, a second opening provided in at least one of the support portion and the fixed portion, a pin, and a fixing member capable of fixing the pin to a portion of at least one of the support portion and the fixed portion that is different from the second opening, The pin is inserted across the first opening and the second opening, and is fixed by the fixing member to a portion of at least one of the support part and the fixing part that is different from the second opening, thereby attaching the angle setting cylinder to at least one of the support part and the fixing part.

2. 2. The work vehicle according to claim 1, wherein the first opening, the second opening, the pin, and the fixing member are provided in both the attachment portion between the angle setting cylinder and the support portion and the attachment portion between the angle setting cylinder and the fixing portion.

3. a mounting portion attached to the pin; The work vehicle according to claim 1 , wherein the attachment portion is fixed by the fixing member to a portion of at least one of the support portion and the fixing portion that is different from the second opening.

4. The support portion extends rearward from the axis, 2. The work vehicle according to claim 1, wherein the angle setting cylinder is attached to a portion of the support part rearward of the axis.

5. 2. The work vehicle according to claim 1, wherein an operating part that can fix and release the extension and retraction of the angle setting cylinder and that can be manually operated is provided at the end of the angle setting cylinder on the support part side.

6. the angle setting cylinder is provided below the support part, 6. The work vehicle according to claim 5, wherein the operating portion extends downward from the angle setting cylinder.

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