Work vehicle

Abstract

To improve productivity on a work vehicle.SOLUTION: A work vehicle includes: an operation steering 25 fitted to a support frame 31, artificially operable, and performing steering operation; and a shift operation tool 26 fitted to the support frame 31, artificially operable, and operating a travelling transmission device. The operation steering 25 and the shift operation tool 26 are fitted to the support frame 31 and the support frame 31 is fitted to machine body frames 16-20, thereby fitting the operation steering 25 and the shift operation tool 26 to a machine body.SELECTED DRAWING: Figure 3

Description

[Technical field]

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

[0002] In a multipurpose work vehicle, which is one example of a work vehicle, a steering handle for steering is attached to the machine frame (part of the machine body) provided in front of the driver's seat, as disclosed in Patent Document 1. In a work vehicle, a gear shift lever for traveling (corresponding to a gear shifting device) and the like are sometimes located near the steering handle and attached to the machine frame. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2012-11800 A Summary of the Invention [Problem to be solved by the invention]

[0004] When the steering handle, gear shift lever, etc. are attached to the machine frame (machine body) in front of the driver's seat, there is room for improvement in terms of improving the productivity of the work vehicle. The present invention has an object to improve productivity in work vehicles. [Means for solving the problem]

[0005] The work vehicle of the present invention is provided with a running gear and a transmission that changes the speed of the power that drives the running gear, and is equipped with a machine body having a machine body frame, a support frame attached to the machine body frame, a steering handle attached to the support frame, manually operable to perform steering operations, and a speed change operating device attached to the support frame, manually operable to operate the speed change device, the steering handle and the speed change operating device being attached to the support frame, and the support frame being attached to the machine body frame, whereby the steering handle and the speed change operating device are attached to the machine body.

[0006] According to the present invention, when the steering handle and the gear shift operating device are attached to the aircraft frame, the steering handle and the gear shift operating device are attached to the support frame in advance, and the support frame is attached to the aircraft frame, thereby attaching the steering handle and the gear shift operating device to the aircraft.

[0007] As a result, by attaching the support frame to the vehicle frame, the steering handle and the gear change device can be attached to the vehicle at once, which simplifies the assembly process and improves the productivity of the work vehicle compared to when the steering handle and the gear change device are each attached to the vehicle separately.

[0008] In the present invention, it is preferable that a power steering motor is attached to the support frame and assists in operation of the steering handle, and a steering control device is attached to the support frame and operates the power steering motor, and that the power steering motor and the steering control device are attached to the support frame, and the support frame is attached to the aircraft frame, thereby attaching the power steering motor and the steering control device to the aircraft.

[0009] According to the present invention, in a work vehicle equipped with an electric type power steering function having a power steering motor and a steering control device, in addition to the steering handle and the gear change device being pre-attached to the support frame, the power steering motor and the steering control device are also pre-attached to the support frame.

[0010] As a result, by attaching the support frame to the vehicle frame, the steering handle, gear change device, power steering motor and steering control device can be attached to the vehicle at once, simplifying the assembly process and improving the productivity of the work vehicle.

[0011] In the present invention, it is preferable that a brake capable of braking the traveling device and a parking operation device attached to the support frame, manually operable, and capable of holding the brake in a braking state are provided, and that the parking operation device is attached to the support frame, and the support frame is attached to the machine frame, thereby attaching the parking operation device to the machine.

[0012] According to the present invention, in a work vehicle equipped with a parking brake function, in addition to the steering handle and the gear change operating device being pre-attached to the support frame, the parking operating device is pre-attached to the support frame.

[0013] As a result, by attaching the support frame to the vehicle frame, the steering handle, the gear change operating device, and the parking operating device can be attached to the vehicle at once, simplifying the assembly process and improving the productivity of the work vehicle.

[0014] In the present invention, the running device has front wheels and rear wheels, is attached to the support frame, and is equipped with a switching operation device for manually switching between a four-wheel drive state in which the front wheels and the rear wheels are driven, and a two-wheel drive state in which the rear wheels are driven, and it is preferable that the switching operation device is attached to the support frame, and the support frame is attached to the vehicle frame, thereby attaching the switching operation device to the vehicle.

[0015] According to the present invention, in a work vehicle that can be switched between a four-wheel drive state and a two-wheel drive state, in addition to the steering handle and the gear change operating device being pre-attached to the support frame, a switching operating device for the four-wheel drive state and the two-wheel drive state is pre-attached to the support frame.

[0016] As a result, by attaching the support frame to the vehicle frame, the steering handle, the gear change operating device and the switching operating device can be attached to the vehicle at once, simplifying the assembly process and improving the productivity of the work vehicle.

[0017] In the present invention, it is preferable that the aircraft frame has left and right portions along the left-right direction and upper and lower portions along the up-down direction, and the support frame has a first portion that is placed on the left and right portions from above and a second portion that is abutted against the upper and lower portions, and that the left and right portions and the first portion are connected, and the upper and lower portions and the second portion are connected.

[0018] According to the present invention, when the support frame is attached to the aircraft frame, the first portion of the support frame is placed on the aircraft frame from above, so that the support frame is supported by the aircraft frame.

[0019] By supporting the support frame on the machine frame, the left and right parts of the machine frame can be easily connected to the first part of the support frame, and the top and bottom parts of the machine frame can be easily connected to the second part of the support frame, thereby improving the productivity of the work vehicle. [Brief description of the drawings]

[0020] [Figure 1] FIG. [Diagram 2] FIG. 2 is a schematic diagram showing a transmission configuration of a traveling system. [Diagram 3] FIG. 2 is a rear view showing the state in which the support frame, to which the control handle and switching lever are attached, is attached to the aircraft body. [Figure 4] FIG. 2 is a left side view showing the state in which the support frame, to which the control handle and switching lever are attached, is attached to the aircraft body. [Diagram 5] FIG. 2 is a plan view showing a state in which a support frame, to which a control handle and a switching lever are attached, is attached to an aircraft body. [Figure 6] FIG. 2 is a front view showing a state in which a support frame to which a control handle and a switching lever are attached is attached to an aircraft body. [Figure 7] FIG. 2 is a left side view in vertical section showing a state in which a support frame, to which a control handle and a switching lever are attached, is attached to an aircraft body (connecting portion). [Figure 8] FIG. 2 is a left side view in vertical section showing a state in which a support frame, to which a control handle and a switching lever are attached, is attached to an aircraft body (connecting portion). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Figures 1 to 8 show a multi-purpose work vehicle, which is an example of a work vehicle, and in Figures 1 to 8, F indicates the forward direction, B indicates the rearward direction, U indicates the upward direction, D indicates the downward direction, R indicates the rightward direction, and L indicates the leftward direction.

[0022] (Overall configuration of the work vehicle) As shown in Fig. 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.

[0023] A driver's seat 8 and a passenger seat 9 at the front and a rear seat 10 at the rear are provided on a floor frame 4, and a ROPS frame 5 is connected to the floor frame 4 so as to cover the driver's seat 8, the passenger seat 9 and the rear seat 10 at the rear.

[0024] (Drive system transmission structure) 1 and 2, a rear frame 6 and a lower frame 7 are connected to the rear of the ROPS frame 5 and extend rearward, and a cargo bed 11 is provided on the rear frame 6. An engine 12, a continuously variable transmission 13, a transmission case 14, and rear wheels 2 are provided on the lower frame 7.

[0025] 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 51, the continuously variable transmission 13 is automatically operated to the high speed side accordingly. When the rotation speed of the engine 12 decreases as a result of releasing the accelerator pedal 51, the continuously variable transmission 13 is automatically operated to the low speed side accordingly.

[0026] Inside the transmission case 14, there are provided a gear-shift type auxiliary transmission 52 (corresponding to a transmission for driving) capable of shifting into three forward speeds and one reverse speed, a rear wheel differential device 53, and a front wheel transmission device 54.

[0027] 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 sub-transmission 52 where the speed is changed, transmitted from the sub-transmission 52 to the rear wheel differential device 53, and transmitted from the rear wheel differential device 53 to the rear wheels 2. The power branched off between the sub-transmission device 52 and the rear wheel differential device 53 is transmitted via the front wheel transmission device 54 and the transmission shaft 55 to the front wheel differential device 56, and transmitted from the front wheel differential device 56 to the front wheels 1.

[0028] When the front wheel transmission device 54 is operated to the four-wheel drive state, the power branched between the sub-transmission device 52 and the rear wheel differential device 53 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 device 54 is operated to the two-wheel drive state, the power is cut off at the front wheel transmission device 54, resulting in a two-wheel drive state in which the rear wheels 2 are driven.

[0029] Brakes 57 are provided for the right and left front wheels 1, and brakes 57 are provided for the right and left rear wheels 2. The brakes 57 are operated by depressing a brake pedal 58.

[0030] (Configuration near the front of the aircraft) As shown in Figures 3, 4, and 5, a frame 16 (corresponding to the aircraft frame) extending in the left-right direction is connected to the lower parts of the right and left ROPS frames 5, and a frame 17 (corresponding to the aircraft frame) extending in the left-right direction is connected to the upper and lower middle parts of the right and left ROPS frames 5.

[0031] A frame 18 (corresponding to the body frame) extending in the up-down and front-rear directions is connected across the left-right intermediate portions of the frames 16 and 17. A frame 19 (corresponding to the body frame) extending in the left-right direction is connected across the up-down intermediate portion of the left ROPS frame 5 and the frame 18. A frame 20 (corresponding to the body frame) extending in the up-down direction is connected across the frames 16 and 19.

[0032] A connecting portion 48 (corresponding to the aircraft frame) formed by bending a plate material into a box shape is connected to the connecting portion between frames 18 and 19 (see FIG. 7). A connecting portion 49 (corresponding to the aircraft frame) formed by bending a plate material into a box shape is connected to frame 20 (see FIG. 8).

[0033] 7 and 8, the connecting parts 48, 49 have upper surface parts 48a, 49a (corresponding to left and right parts) and vertical surface parts 48b, 49b (corresponding to top and bottom parts), and a convex part 48c is provided on the upper surface part 48a of the connecting part 48. Since the frames 18, 20 aligned along the up-down direction are arranged side by side along the left-right direction, the upper surface parts 48a, 49a of the connecting parts 48, 49 are arranged side by side with a gap therebetween in the left-right direction.

[0034] The frames 18, 20 are in a forward-leaning position in which the upper portions of the frames 18, 20 are located forward of the lower portions of the frames 18, 20. As a result, the vertical surfaces 48b, 49b of the connecting portions 48, 49 are in a forward-leaning position in which the upper portions of the vertical surfaces 48b, 49b of the connecting portions 48, 49 are located forward of the lower portions of the vertical surfaces 48b, 49b of the connecting portions 48, 49, and are aligned in the up-down direction.

[0035] 1 and 3, a front panel 15, which separates the vicinity of the front wheel 1 of the body 3 from the vicinity of the driver's seat 8 and the passenger seat 9, is connected to the floor frame 4, the lower parts of the right and left ROPS frames 5, and the frame 17. A synthetic resin panel 24 is attached to the frames 16 to 20. The front panel 15, the frames 16 to 20, and the connecting parts 48 and 49 are part of the body 3.

[0036] 3 and 5, an arm 21 is connected to the right ROPS frame 5 and the frame 18 and extends rearward, and a frame 22 extending in the left-right direction is connected across the right and left arms 21. An auxiliary handle 23 is connected to the frame 22 and is located in front of the passenger seat 9.

[0037] (Summary of the mounting structure for control handles, etc. to the aircraft) As shown in Figures 2 to 5, the vehicle is provided with a steering handle 25 that can manually steer the front wheels 1. A shift lever 26 (corresponding to a shift operation tool) is provided that can manually operate the auxiliary transmission 52 of the transmission case 14 to have three forward speeds and one reverse speed.

[0038] A power steering motor 27 is provided to assist the steering of the front wheels 1 by the steering handle 25. A steering control device 28 for operating the power steering motor 27 is also provided.

[0039] A parking lever 29 (corresponding to a parking operation tool) is provided which can operate and hold the brake 57 in a braking state. A switching lever 30 (corresponding to a switching operation tool) is provided which can operate the front wheel transmission device 54 to a four-wheel drive state or a two-wheel drive state.

[0040] A steering handle 25, a speed change lever 26, a power steering motor 27, a steering control device 28, a parking lever 29 and a switching lever 30 are attached to a support frame 31 which will be described below.

[0041] The support frame 31 to which the steering handle 25 to the switching lever 30 are attached is attached to the frames 16, 18, 19, 20 and the connecting parts 48, 49. As a result, the steering handle 25 to the switching lever 30 are attached to the aircraft body 3 (the frames 16, 18, 19, 20 and the connecting parts 48, 49) via the support frame 31.

[0042] (Support frame configuration) As shown in FIGS. 3 to 6, the support frame 31 has a base member 32, support members 33, 34, 35, 36, and 37, brackets 38 and 39, and lever guides 40 and 41. As shown in FIG.

[0043] The substrate member 32 is configured in a flat plate shape, with the upper side of the flat plate being bent. In the substrate member 32, the bent upper side is a first portion 32a, and the portion extending downward from the first portion 32a is a second portion 32b.

[0044] The support member 33 is configured by being bent into a channel shape, and is connected to the left part of the rear surface part of the second portion 32b of the base member 32 and extends rearward. The right and left support members 34 are connected to the vicinity of the left-right center of the rear surface of the second portion 32b of the base member 32, and extend rearward. The support member 35 is connected to the right part of the rear surface of the second portion 32b of the base member 32 and extends rearward.

[0045] The support member 36 is connected to a lower portion of the front surface of the second portion 32b of the base member 32. The support member 37 is connected to a right portion of the first portion 32a of the base member 32. The bracket is connected to an upper portion of the second portion 32b of the base member 32 near the left-right center and extends rearward, and a lever guide 40 is connected to the bracket . The bracket 39 is connected to an upper portion of the first portion 32a of the base member 32 near the left-right center and extends rearward.

[0046] (Mounting state of steering handle to switching lever on support frame) 3 to 6, the base of the steering handle 25 is attached to a support member 33 of a support frame 31 so as to be tiltable (changeable in direction) around an axis P1 along the left-right direction. A tilt cylinder 42, which biases the steering handle 25 to slightly lift, is attached between the support member 33 of the support frame 31 and the base of the steering handle 25.

[0047] A steering shaft 43 extends downward and forward from the steering wheel 25. A power steering motor 27 is attached to the support member 36 of the support frame 31 and acts on the steering shaft 43. A steering control device 28 is attached to a portion of the second part 32b of the base member 32 of the support frame 31 below the support member 33.

[0048] An operating shaft 44 is attached to the right and left support members 34 of the support frame 31 so as to be swingable about an axis P2 along the left-right direction, and an operating wire 45 is connected between the operating shaft 44 and the sub-speed change device 52 (see FIG. 2). The speed change lever 26 is attached to the operating shaft 44 and extends upward through the lever guide 40.

[0049] The parking lever 29 is attached to the support member 35 of the support frame 31 so as to be swingable around an axis P3 along the left-right direction, and an operating wire 46 is connected between the parking lever 29 and the operating system of the brake 57.

[0050] The switching lever 30 is attached to the support member 37 of the support frame 31 so as to be swingable about an axis P4 along the vertical direction, and extends upward through a lever guide 41. An operating wire 47 is connected between the switching lever 30 and the front wheel transmission device 54 (see FIG. 2).

[0051] (Correspondence to claims regarding support frames) The vehicle is provided with a running device (front wheels 1, rear wheels 2) and a transmission (auxiliary transmission 52) that changes the speed of the power that drives the running device (front wheels 1, rear wheels 2), and a body 3 having a body frame (frames 16-20, connecting parts 48, 49). A support frame 31 is provided which is attached to the aircraft frame (frames 16 to 20, connecting portions 48, 49).

[0052] A steering handle 25 is attached to the support frame 31 and is manually operable to perform steering operations. A speed change operating device (speed change lever 26) is attached to the support frame 31 and is manually operable to operate the speed change device (auxiliary speed change device 52). The steering handle 25 and the gear shift operating device (gear shift lever 26) are attached to the support frame 31, and the support frame 31 is attached to the aircraft frame (frames 16-20, connecting parts 48, 49), thereby attaching the steering handle 25 and the gear shift operating device (gear shift lever 26) to the aircraft body 3.

[0053] A power steering motor 27 is attached to the support frame 31 and assists in the operation of the steering handle 25. A steering control device 28 is attached to the support frame 31 and operates the power steering motor 27. The power steering motor 27 and the steering control device 28 are attached to the support frame 31, and the support frame 31 is attached to the aircraft frame (frames 16 to 20, connecting parts 48, 49), whereby the power steering motor 27 and the steering control device 28 are attached to the aircraft body 3.

[0054] A brake 57 capable of braking the running gear (front wheels 1, rear wheels 2) is provided. A parking operation tool (parking lever 29) is attached to the support frame 31 and can be manually operated to hold the brake 57 in a braking state. The parking operation device (parking lever 29) is attached to the support frame 31, and the support frame 31 is attached to the machine body frame (frames 16 to 20, connecting portions 48, 49), whereby the parking operation device (parking lever 29) is attached to the machine body 3.

[0055] The running gear has a front wheel 1 and a rear wheel 2. A switching device (switching lever 30) is attached to a support frame 31 and is provided for manually switching between a four-wheel drive state in which the front wheels 1 and rear wheels 2 are driven, and a two-wheel drive state in which the rear wheels 2 are driven. The switching operation device (switching lever 30) is attached to the support frame 31, and the support frame 31 is attached to the machine body frame (frames 16 to 20, connecting portions 48, 49), whereby the switching operation device (switching lever 30) is attached to the machine body 3.

[0056] (Support frame attached to the aircraft) As shown in Figures 7 and 8, in the support frame 31 to which the steering handle 25 to the switching lever 30 are attached, the convex portion 48c of the connecting portion 48 is inserted into the opening 32c on the right side of the first portion 32a of the support frame 31 (base member 32). The right and left parts of the first portion 32a of the support frame 31 (base member 32) are placed on the upper surface parts 48a, 49a of the connecting parts 48, 49 from above. The right and left parts of the second portion 32b of the support frame 31 (base member 32) are abutted against the vertical surfaces 48b, 49b of the connecting parts 48, 49 from behind.

[0057] In this case, since the upper surface portions 48a, 49a of the connecting portions 48, 49 are aligned with a gap therebetween in the left-right direction, the support frame 31 is supported by the upper surface portions 48a, 49a of the connecting portions 48, 49 so as not to fall downward. Since the vertical surfaces 48b, 49b of the connecting portions 48, 49 are inclined forward, the support frame 31 is stably abutted against the vertical surfaces 48b, 49b of the connecting portions 48, 49. By inserting the protrusion 48c of the connecting portion 48 into the opening 32c on the right side of the first portion 32a of the support frame 31 (base member 32), the support frame 31 is less likely to move in the left-right and front-rear directions.

[0058] In the above-mentioned state, the right part of the second portion 32b of the support frame 31 (base member 32) is connected to the vertical surface portion 48b of the connecting portion 48 by the bolt 50. A left portion of the first portion 32a of the support frame 31 (base member 32) is connected to an upper surface portion 49a of the connecting portion 49 by a bolt 50. The lower left part of the second portion 32b of the support frame 31 (base member 32) is connected to the vertical surface portion 49b of the connecting portion 49 by a bolt 50.

[0059] As described above, the support frame 31 (base member 32) is connected to the connecting portions 48, 49, thereby attaching the support frame 31 to the frames 16, 18, 19, 20. The control handle 25 to the switching lever 30 are attached to the aircraft body 3 (the frames 16, 18, 19, 20 and the connecting portions 48, 49) via the support frame 31.

[0060] (Correspondence to claims regarding the state in which the support frame is attached to the aircraft body) The machine body frame (frames 16 to 20, connecting portions 48, 49) has left and right portions (upper surface portions 48a, 49a) along the left-right direction and upper and lower portions (vertical surface portions 48b, 49b) along the up-down direction.

[0061] The support frame 31 has a first portion 32a placed on the left and right portions (upper surface portions 48a, 49a) from above, and a second portion 32b abutted against the upper and lower portions (vertical surface portions 48b, 49b). The left and right portions (upper surface portions 48a, 49a) are connected to the first portion 32a, and the top and bottom portions (vertical surface portions 48b, 49b) are connected to the second portion 32b.

[0062] (First Alternative Embodiment of the Invention) In addition to the protrusion 48c of the connecting portion 48 being inserted into the opening 32c in the right portion of the first portion 32a of the support frame 31 (base member 32), the right portion of the first portion 32a of the support frame 31 (base member 32) may be connected to the upper surface portion 48a of the connecting portion 48 with a bolt 50.

[0063] (Second Alternative Embodiment of the Invention) The upper surface of the frame 19 may be configured as left and right portions, so that the entire first portion 32a of the support frame 31 (base member 32) is placed on the upper surface of the frame 19 from above.

[0064] (Third Alternative Embodiment of the Invention) The power steering motor 27 may be mounted on the frame 16 rather than on the support frame 31 . The power steering motor 27 and the steering control device 28 may be eliminated.

[0065] (Fourth Alternative Embodiment of the Invention) If the front wheel transmission device 54 is not provided, the switching lever 30 is eliminated. According to this configuration, the work vehicle becomes a four-wheel drive type in which the front wheels 1 and the rear wheels 2 are constantly driven, or a two-wheel drive type in which the front wheels 1 are not driven and the rear wheels 2 are driven.

[0066] (Fifth Alternative Embodiment of the Invention) If a hydrostatic type continuously variable transmission (corresponding to a transmission for driving) is provided instead of the belt type continuously variable transmission 13, the hydrostatic type continuously variable transmission may be configured to be operated by the shift lever 26.

[0067] (Sixth Alternative Embodiment of the Invention) Instead of the engine 12, the vehicle may be configured as an electric work vehicle using an electric motor (not shown) as a power source. It may also be configured as a hybrid type work vehicle using the engine 12 and an electric motor (not shown) as a power source. [Industrial Applicability]

[0068] The present invention can be applied not only to work vehicles having front wheels 1 and rear wheels 2, but also to work vehicles having front wheels 1 and rear crawler running devices (equivalent to running devices), and can also be applied to work vehicles not having front wheels 1 and rear wheels 2 but having right and left crawler running devices. [Explanation of symbols]

[0069] 1 Front wheel (running gear) 2 Rear wheels (running gear) 3. Aircraft 52 Sub-transmission device (transmission device) 16 Frame (Aircraft Frame) 17 Frame (aircraft frame) 18 Frame (aircraft frame) 19 Frame (aircraft frame) 20 Frame (Aircraft Frame) 25 Steering wheel 26 Gear shift lever (gear shifting device) 27 Power steering motor 28 Steering control device 29 Parking lever (parking operation tool) 30 Switching lever (switching device) 31 Support frame 32a Part 1 32b Part 2 48 Connection part (airframe) 48a Top part (left and right parts) 48b Vertical section (upper and lower sections) 49 Connection part (airframe) 49a Top part (left and right parts) 49b Vertical section (upper and lower sections) 57 Brake

Claims

1. A machine body having a machine frame, the machine body being provided with a traveling device and a speed change device that changes the speed of a power source that drives the traveling device; A support frame attached to the fuselage frame; A steering handle attached to the support frame and operable manually to perform a steering operation; a speed change operating tool attached to the support frame and manually operable to operate the speed change device; The steering handle and the gear shift operating device are attached to the support frame, and the support frame is attached to the vehicle frame, thereby attaching the steering handle and the gear shift operating device to the vehicle.

2. a power steering motor attached to the support frame for assisting operation of the steering handle; a steering control device attached to the support frame and operating the power steering motor, 2. The work vehicle according to claim 1, wherein the power steering motor and the steering control device are attached to the support frame, and the support frame is attached to the vehicle frame, thereby attaching the power steering motor and the steering control device to the vehicle.

3. A brake capable of braking the traveling device; a parking operation tool attached to the support frame, manually operable, and capable of holding the brake in a braking state; 2. The work vehicle according to claim 1, wherein the parking operation tool is attached to the support frame, and the support frame is attached to the vehicle frame, thereby attaching the parking operation tool to the vehicle.

4. The traveling device has front wheels and rear wheels, a switching operation device is provided which is attached to the support frame and manually switches between a four-wheel drive state in which the front wheels and the rear wheels are driven and a two-wheel drive state in which the rear wheels are driven; 2. The work vehicle according to claim 1, wherein the switching operation tool is attached to the support frame, and the support frame is attached to the vehicle frame, thereby attaching the switching operation tool to the vehicle.

5. the aircraft frame has left and right portions along a left-right direction and upper and lower portions along a up-down direction, the support frame has a first portion that is placed on the left and right portions from above and a second portion that is abutted against the upper and lower portions, The work vehicle according to any one of claims 1 to 4, wherein the left and right portions are connected to the first portion, and the upper and lower portions are connected to the second portion.

Images