Work vehicle

Abstract

To provide a work vehicle that includes a driver seat whose position is adjustable in a fore-and-aft direction of a vehicle body, and an operation pedal located on a front lower side of the driver seat, and that allows whichever of a tall driver and a short driver to easily operate the operation pedal, as well as, to readily attain the operation condition.SOLUTION: A work vehicle includes: a pedal support mechanism 25 capable of changing a vehicle-body-related posture of an operation pedal 24; and a linkage mechanism 27 between a driver seat 6 and the pedal support mechanism 25. The pedal support mechanism 25 is operated by the linkage mechanism 27 so that the vehicle-body-related posture of the operation pedal 24 in an unoperated condition which is attained when the driver seat 6 is adjusted forward will face more upward than the vehicle-body-related posture of the operation pedal 24 in the unoperated condition which is attained when the driver seat 6 is adjusted backward, and the vehicle-body-related posture of the operation pedal 24 in the unoperated condition which is attained when the operator seat 6 is adjusted backward will face more downward than the vehicle-body-related posture of the operation pedal 24 in the unoperated condition which is attained when the operator seat 6 is adjusted forward.SELECTED DRAWING: Figure 3

Description

[Technical Field]

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

[0002] As shown in Patent Document 1, there is a work vehicle (tractor) equipped with a driver's seat (reclining seat) that can be adjusted in position in the fore-and-aft direction of the vehicle body. Some work vehicles of this type are equipped with an operation pedal that is provided in front of and below the driver's seat and is operated to swing around a fulcrum axis that extends in the width direction of the vehicle body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-252853 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned work vehicles, generally, tall drivers adjust the driver's seat to a rearward position to operate the control pedals, while short drivers adjust the driver's seat to a forward position to operate the control pedals. There is a demand for a work vehicle whose control pedals are easy to operate for both tall and short drivers.

[0005] To provide a work vehicle in which both short and tall drivers can easily operate an operation pedal and in which the easy-to-operate state of the operation pedal can be easily obtained. [Means for solving the problem]

[0006] The work vehicle according to the present invention comprises: A driver's seat that can be adjusted in position in the fore-and-aft direction of the vehicle body; A driver's floor;The vehicle is provided with an operation pedal that is provided in front of and below the driver's seat and is operated to swing around a fulcrum axis extending in the vehicle width direction as a swing fulcrum; a pedal support mechanism that supports the operation pedal in a state in which the attitude of the operation pedal relative to the vehicle body when the operation pedal is not operated can be changed; and a linkage mechanism that links the driver's seat and the pedal support mechanism, wherein, when the driver's seat is adjusted to a forward position, the pedal support mechanism is operated by the linkage mechanism so that the attitude of the operation pedal relative to the vehicle body when the operation pedal is not operated in this case is more upward relative to the vehicle body than the attitude of the operation pedal relative to the vehicle body when the driver's seat is adjusted to a rearward position, and when the driver's seat is adjusted to a rearward position, the pedal support mechanism is operated by the linkage mechanism so that the attitude of the operation pedal relative to the vehicle body when the operation pedal is not operated in this case is more downward relative to the vehicle body than the attitude of the operation pedal relative to the vehicle body when the driver's seat is adjusted to a forward position. The linking mechanism includes a linking mechanism that links the driver's seat and the pedal support mechanism, and the linking mechanism is passed under the driver's floor in the front-rear direction of the vehicle body. do.

[0007] According to this configuration, when the driver's seat is adjusted to a forward position due to the action of the linkage mechanism, the position of the control pedal relative to the vehicle body in this case when the control pedal is not operated becomes more upward relative to the vehicle body than the position of the control pedal relative to the vehicle body in this case when the driver's seat is adjusted to a rearward position. When the driver's seat is adjusted to a rearward position, the position of the control pedal relative to the vehicle body in this case when the control pedal is not operated becomes more downward relative to the vehicle body than the position of the control pedal relative to the vehicle body in this case when the driver's seat is adjusted to a forward position. For short drivers, the driver's seat is generally adjusted to a forward position and the control pedal is operated while pointing slightly downward, but for short drivers, the control pedal is in a position relative to the vehicle body that makes it easy to efficiently transmit the slightly downward depression force due to the driver's seat being adjusted forward, making it easy to operate the control pedal. In the case of a tall driver, the driver's seat is generally adjusted to a rearward position and the operating pedal is operated by stepping on it slightly forward, but for a tall driver, the operating pedal is in a position relative to the vehicle body that makes it easy to efficiently transmit the slightly forward stepping force due to the rearward adjustment of the driver's seat, making it easy to operate the operating pedal. When the position of the driver's seat is adjusted, the pedal support mechanism is operated by the linkage mechanism to change the attitude of the operating pedal relative to the vehicle body, so that the operating pedal can be easily operated simply by adjusting the position of the driver's seat.

[0008] In the present invention, It is preferable that the operating pedal is provided with a rotating support shaft having the fulcrum axis, and the pedal support mechanism is a pedal support member that is swingably supported on the vehicle body via a pivot axis parallel to the fulcrum axis while rotatably supporting the rotating support shaft.

[0009] According to this configuration, the pedal support mechanism has a simple structure that only includes a pedal support member, so that an operating pedal that is easy to operate regardless of height can be obtained at low cost.

[0010] In the present invention, The linking mechanism is preferably a link mechanism that links the driver's seat and the pedal support member together.

[0011] According to this configuration, the power for changing the position of the driver's seat can be transmitted to the pedal support mechanism by the link mechanism to operate the pedal support mechanism, so there is no need to provide a special actuator for operating the pedal support mechanism, and an operating pedal that is easy to operate regardless of height can be obtained at low cost.

[0012] In the present invention, The link mechanism includes a seat-side rocking link that is connected to the driver's seat and is rocked by changing the position of the driver's seat, a pedal-side rocking link that is connected to the pedal support member and rocks the pedal support member, and a link mechanism that is connected to the seat-side rocking link and the pedal-side rocking link and interlocks the seat-side rocking link and the pedal-side rocking link. The interlocking mechanism Preferably, an interlocking link is provided.

[0013] According to this configuration, the link mechanism has a simple structure that only includes a seat-side swing link, an interlocking link, and a pedal-side swing link, so that an operating pedal that is easy to operate regardless of height can be obtained at low cost.

[0014] In the present invention, The interlocking link is preferably passed below the operating pedal in the longitudinal direction of the vehicle body.

[0015] According to this configuration, the interlocking link can be easily positioned so as not to interfere with the operation of the operating pedal.

[0016] In the present invention, It is preferable that the operating pedals include an accelerator pedal for operating an engine accelerator device and a brake pedal for operating a driving brake, that the pedal support mechanism includes a first pedal support mechanism for supporting the accelerator pedal and a second pedal support mechanism for supporting the brake pedal, and that the linking mechanism includes a first linking mechanism for linking the first pedal support mechanism with the driver's seat and a second linking mechanism for linking the second pedal support mechanism with the driver's seat.

[0017] According to this configuration, the first pedal support mechanism is linked to the driver's seat by a first linkage mechanism corresponding to the accelerator pedal, and the second pedal support mechanism is linked to the driver's seat by a second linkage mechanism corresponding to the brake pedal, making it possible to make the accelerator pedal and brake pedal easy to operate regardless of whether the driver is tall or short. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] 10 is a side view showing the state of the accelerator pedal, the first pedal support mechanism, and the first linkage mechanism when the driver's seat is adjusted to a rearward position. FIG. [Figure 4]10 is a side view showing the state of the accelerator pedal, the first pedal support mechanism, and the first linkage mechanism when the driver's seat is adjusted to a forward position. FIG. [Figure 5] FIG. 10 is a side view showing the brake pedal, the second pedal support mechanism, and the second linkage mechanism when the driver's seat is adjusted to a rearward position. [Figure 6] FIG. 10 is a side view showing the brake pedal, the second pedal support mechanism, and the second linkage mechanism when the driver's seat is adjusted to a forward position. DETAILED DESCRIPTION OF THE INVENTION

[0019] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to the accompanying drawings. In the following description, with regard to the traveling body of a multipurpose work vehicle (an example of a "work vehicle"), the direction of arrow F shown in Figures 1 and 2 is the "front side of the vehicle body," the direction of arrow B shown in Figures 1 and 2 is the "rear side of the vehicle body," the direction of arrow U shown in Figure 1 is the "upper side of the vehicle body," the direction of arrow D shown in Figure 1 is the "lower side of the vehicle body," the direction of arrow L shown in Figure 2 is the "left side of the vehicle body," and the direction of arrow R shown in Figure 2 is the "right side of the vehicle body." The left-right direction of the vehicle body corresponds to the width direction of the vehicle body.

[0020] [Overall configuration of the multipurpose work vehicle] As shown in Figures 1 and 2, the multipurpose work vehicle has a traveling body 3 supported by a pair of left and right front wheels 1 that can be driven and steered, and a pair of left and right rear wheels 2 that can be driven. A front lid 4 and a driver's section 5 located rearward of the front lid 4 are provided at the front of the traveling body 3. The driver's section 5 is provided with a driver's seat 6, a steering wheel 7 that steers the front wheels 1, and a rope 8 that encloses the passenger space. A loading platform 9 is provided behind the loading platform 5. An engine 10, a continuously variable transmission 11, and a transmission case 12 are provided below the loading platform 9. The output of the engine 10 is input to the continuously variable transmission 11 where it is changed in speed, and the output of the continuously variable transmission 11 is input to the transmission case 12 and transmitted to the rear wheels 2 and the front wheels 1 from a traveling transmission (not shown) housed in the transmission case 12. Power is transmitted from the driving transmission to the front wheels 1 by a front wheel output shaft 13 protruding from the front of the transmission case 12, and the front wheel output shaft 13 and an input shaft 15 of the front wheel drive case 14 being connected by a rotating shaft 16.

[0021] [Driver's seat] As shown in Figures 1 and 2, a driver's seat 6 is provided on the left side of the vehicle body in the boarding space of the driver's section 5. In this embodiment, the driver's seat 6 is provided on the left side of the vehicle body in the boarding space, but it can also be provided on the right side of the vehicle body or in the center of the boarding space. As shown in Figures 3 and 4, the driver's seat 6 is attached to a seat support part 17 provided on the traveling vehicle body 3 via a position adjustment mechanism 18. The position adjustment mechanism 18 makes it possible to adjust the attachment position of the driver's seat 6 relative to the traveling vehicle body 3 in the fore-and-aft direction of the vehicle body.

[0022] Specifically, as shown in FIG. 3 , the position adjustment mechanism 18 has a guide rail 19 provided on the seat support portion 17 and a seat support body 20 provided below the driver's seat 6. The seat support body 20 is supported on the guide rail 19 so as to be slidable in the fore-and-aft direction of the vehicle body. The range over which the seat support body 20 can slide relative to the guide rail 19 is set as an adjustment range T (see FIGS. 3 and 4 ) over which the position of the driver's seat 6 can be adjusted. A positioning mechanism 21 is provided across the guide rail 19 and the seat support body 20. The positioning mechanism 21 can be switched between a locked state in which the seat support body 20 is fixed to the guide rail 19 at any position of the guide rail 19 in the fore-and-aft direction of the vehicle body, and a released state in which the seat support body 20 is released from the fixed state of the guide rail 19. A positioning lever 22 is provided on one side of the driver's seat 6 and can be operated to switch the positioning mechanism 21 between the locked state and the released state.

[0023] The position of the driver's seat 6 is adjusted based on the following operating procedures. The driver's seat 6 is slid toward the front or rear of the vehicle body while the positioning mechanism 21 is switched to the release state by the positioning lever 22. When the driver's seat 6 is positioned at the installation position to be adjusted, the positioning mechanism 21 is switched to the lock state by the positioning lever 22. Then, the seat support body 20 is fixed to the guide rail 19 by the positioning mechanism 21, and the driver's seat 6 is fixed to the seat support part 17 at the installation position to be adjusted.

[0024] [Accelerator pedal] As shown in FIGS. 1 and 2, the engine 10 is equipped with an accelerator device 23, and an accelerator pedal 24 for operating the accelerator device 23 is provided in front of and below the driver's seat 6. As shown in FIG. 3, the accelerator pedal 24 includes a pedal arm 24a extending upward from the rear portion of the accelerator pedal 24 and a rotating support shaft 24b connected to the upper portion of the pedal arm 24a. The rotating support shaft 24b is supported by a first pedal support mechanism 25, so that the accelerator pedal 24 is supported by the first pedal support mechanism 25 in a swingable state around a pivot axis Z1 provided on the rotating support shaft 24b and extending in the vehicle width direction. The first pedal support mechanism 25 is supported by a support portion 26 provided on the vehicle body. The accelerator pedal 24 is supported by the vehicle body via the first pedal support mechanism 25.

[0025] Accelerator pedal 24 is linked to accelerator device 23 via a rotation angle sensor (not shown) linked to rotational support shaft 24b, an accelerator control device (not shown) linked to the rotation angle sensor, and an accelerator actuator (not shown) provided in accelerator device 23, enabling operation of accelerator device 23 with accelerator pedal 24. That is, when accelerator pedal 24 is operated, the rotation angle of rotational support shaft 24b relative to first pedal support mechanism 25 is detected by the rotation angle sensor as the operation stroke of accelerator pedal 24, and based on the detection information from the rotation angle sensor, the accelerator control device controls the accelerator actuator, and the accelerator actuator operates accelerator device 23 to a rotational speed state corresponding to the operation position of accelerator pedal 24.

[0026] When the accelerator pedal 24 is not operated (the foot is off), it is supported by the first pedal support mechanism 25 in the position shown by the solid lines in Figures 3 and 4, and when it is depressed to its operating limit, it is supported by the first pedal support mechanism 25 in the position shown by the two-dot chain lines in Figures 3 and 4.

[0027] First pedal support mechanism 25 is supported by support portion 26 in a state in which its mounting position relative to support portion 26 can be changed. First pedal support mechanism 25 is configured to change the position of accelerator pedal 24 relative to the vehicle body by changing its mounting position relative to support portion 26. First pedal support mechanism 25 and seat support member 20 of driver's seat 6 are linked by a first linkage mechanism 27.

[0028] FIG. 3 shows the respective states of the first linkage mechanism 27 and the first pedal support mechanism 25 when the driver's seat 6 is adjusted to the rearmost mounting position among the adjustable mounting positions, and the attitude of the accelerator pedal 24 relative to the vehicle body (attitude relative to the vehicle body) when the accelerator pedal 24 is not operated. When the driver's seat 6 is adjusted to the rearmost mounting position, the attitude of the accelerator pedal 24 relative to the vehicle body when the accelerator pedal 24 is not operated is shown by the line A1. FIG. 4 shows the respective states of the first linkage mechanism 27 and the first pedal support mechanism 25 when the driver's seat 6 is adjusted to the forwardmost mounting position among the adjustable mounting positions, and the attitude of the accelerator pedal 24 relative to the vehicle body when the accelerator pedal 24 is not operated. When the driver's seat 6 is adjusted to the forwardmost mounting position, the attitude of the accelerator pedal 24 relative to the vehicle body when the accelerator pedal 24 is not operated is shown by the line A2.

[0029] 3 and 4, when accelerator pedal 24 is in the position relative to the vehicle body indicated by line A1, inclination angle α1 of accelerator pedal 24 relative to driver's floor 58 is steeper than inclination angle α2 of accelerator pedal 24 relative to driver's floor 58 when accelerator pedal 24 is in the position relative to the vehicle body indicated by line A2. As shown in FIGS. 3 and 4, when driver's seat 6 is adjusted to a forward position, first pedal support mechanism 25 is operated by first linkage mechanism 27 to operate for the front seat, and the position of accelerator pedal 24 relative to the vehicle body in a non-operated state when driver's seat 6 is adjusted to a forward position is made more upward than the position of accelerator pedal 24 relative to the vehicle body in a non-operated state when driver's seat 6 is adjusted to a rearward position. When the driver's seat 6 is adjusted to a rearward position, the first pedal support mechanism 25 is operated by the first linkage mechanism 27 to operate for the rear side of the seat, and the attitude of the accelerator pedal 24 relative to the vehicle body in a non-operated state when the driver's seat 6 is adjusted to a rearward position is made more downward than the attitude of the accelerator pedal 24 relative to the vehicle body in a non-operated state when the driver's seat 6 is adjusted to a forward position.

[0030] When the driver's seat 6 is fixed to the adjustment target mounting position, the first pedal support mechanism 25 is fixed to the support part 26 by being supported by the driver's seat 6 via the first linkage mechanism 27. As a result, even if the accelerator pedal 24 is operated, the first pedal support mechanism 25 does not move, and the accelerator pedal 24 can be depressed.

[0031] 3, the first pedal support mechanism 25 is composed of a single first pedal support member 28. The first pedal support member 28 has a pedal support portion 28a, which rotatably supports a rotational support shaft 24b of the accelerator pedal 24. The accelerator pedal 24 is supported by the first pedal support member 28 in a state in which it can be pivoted around a pivot axis Z1, which is the axis of the rotational support shaft 24b.

[0032] As shown in Fig. 3, a portion of the first pedal support member 28 located below the rotation support shaft 24b is supported by the support portion 26 via a pivot shaft 29. The first pedal support member 28 is supported by the support portion 26 so as to be pivotable about a pivot axis P1 provided on the pivot shaft 29 in a state parallel to the fulcrum axis Z1. As shown in Figs. 3 and 4, when the first pedal support member 28 is pivoted about the pivot axis P1, its mounting position relative to the support portion 26 is changed, thereby changing its position relative to the vehicle body when the accelerator pedal 24 is not being operated.

[0033] 3, the first linkage mechanism 27 is made up of a first link mechanism 30. The first link mechanism 30 includes a first seat-side swing link 32 swingably connected to the seat support body 20 of the driver's seat 6 via a connecting shaft 31, a first pedal-side swing link 34 swingably connected to a portion of the first pedal support member 28 located above the pivot axis P1 via a connecting shaft 33, and a first interlocking link 35 that interlocks the first pedal-side swing link 34 and the first seat-side swing link 32.

[0034] 3, the first seat-side swing link 32 extends downward from the seat support body 20. A middle portion of the first seat-side swing link 32 in the vertical direction of the vehicle body is supported by a support portion 36 provided on the vehicle body via a fulcrum shaft 37. The first seat-side swing link 32 is supported by the vehicle body in a swingable state with the fulcrum shaft 37 as a swing fulcrum.

[0035] The first pedal side swing link 34 extends downward from the connecting shaft 33. A portion of the first pedal side swing link 34 below the connecting shaft 33 is supported by a support portion 38 provided on the vehicle body via a fulcrum shaft 39. The first pedal side swing link 34 is supported by the vehicle body in a swingable state with the fulcrum shaft 39 as the swing fulcrum.

[0036] 3, the front portion of the first interlocking link 35 is swingably connected to a portion of the first pedal-side swing link 34 that is located below the fulcrum shaft 39 via a connecting shaft 40. The rear portion of the first interlocking link 35 is swingably connected to a portion of the first seat-side swing link 32 that is located below the fulcrum shaft 37 via a connecting shaft 41. The first interlocking link 35 interlocks and connects the first seat-side swing link 32 and the first pedal-side swing link 34.

[0037] 3, in the first link mechanism 30, when the driver's seat 6 is moved rearward, the movement of the driver's seat 6 causes the first seat-side swing link 32 to swing in a clockwise swing direction (swing direction indicated by arrow a) around the fulcrum shaft 37, and the first interlocking link 35 is moved forward by the first seat-side swing link 32, and the first pedal-side swing link 34 is pushed by the first interlocking link 35 and swings in a clockwise swing direction (swing direction indicated by arrow b) around the fulcrum shaft 39. In other words, the first link mechanism 30 transmits the rearward movement of the driver's seat 6 to the first pedal support member 28 via the first seat-side swing link 32, the first interlocking link 35, and the first pedal-side swing link 34, and swings the first pedal support member 28 toward the seat rearward. As a result, as shown in Figure 3, when the driver's seat 6 is adjusted to a rearward position, the rearward movement of the driver's seat 6 is transmitted to the first pedal support member 28 by the first link mechanism 30, and the mounting position of the first pedal support member 28 relative to the support portion 26 is adjusted for the rear of the seat.

[0038] 4, in the first link mechanism 30, when the driver's seat 6 is moved forward, the movement of the driver's seat 6 causes the first seat-side swing link 32 to swing in a counterclockwise direction (swing direction indicated by arrow c) around the fulcrum shaft 37, and the first interlocking link 35 is moved rearward by the first seat-side swing link 32, and the first pedal-side swing link 34 is swung in a counterclockwise direction (swing direction indicated by arrow d) around the fulcrum shaft 39 by the first interlocking link 35. In other words, the first link mechanism 30 transmits the forward movement of the driver's seat 6 to the first pedal support member 28 via the first seat-side swing link 32, the first interlocking link 35, and the first pedal-side swing link 34, and swings the first pedal support member 28 toward the seat front. As a result, as shown in Figure 4, when the driver's seat 6 is adjusted to a forward position, the forward movement of the driver's seat 6 is transmitted to the first pedal support member 28 by the first link mechanism 30, and the mounting position of the first pedal support member 28 relative to the support portion 26 is adjusted for the front side of the seat.

[0039] [Brake pedal] 1 and 2, the front-wheel drive case 14 is provided with a left front running brake 45 that applies braking to the left front wheel 1, and a right front running brake 45 that applies braking to the right front wheel 1. The transmission case 12 is provided with a left rear running brake 46 that applies braking to the left rear wheel 2, and a right rear running brake 46 that applies braking to the right rear wheel 2. As shown in FIGS. 1 and 2, one brake pedal 47 for operating the running brakes 45 for the left and right front wheels 1 and the running brakes 46 for the left and right rear wheels 2 is provided in front of and below the driver's seat 6.

[0040] As shown in FIG. 5, the brake pedal 47 includes a pedal arm 47a extending upward from the rear surface of the brake pedal 47 and a rotary support shaft 47b connected to the upper part of the pedal arm 47a. The brake pedal 47 is supported by a second pedal support mechanism 48 having the same configuration as the first pedal support mechanism 25 that supports the accelerator pedal 24. The brake pedal 47 is supported by the second pedal support mechanism 48 by attaching the rotary support shaft 47b to a pedal support portion 48a of the second pedal support mechanism 48. The brake pedal 47 is supported by the second pedal support mechanism 48 in a state in which it can be pivoted about a fulcrum axis Z2 extending in the vehicle width direction as a pivot, and is supported by a support portion 49 of the vehicle body via the second pedal support mechanism 48. The fulcrum axis Z2 is provided on the rotary support shaft 47b.

[0041] The brake pedal 47 is connected to each of the driving brakes 45, 46 via a rotation angle sensor (not shown) that detects the rotation angle of the rotating support shaft 47b relative to the second pedal support mechanism 48 as the operation stroke of the brake pedal 47, a brake actuator (not shown) that operates each of the driving brakes 45, 46, and a brake control device (not shown) that controls the brake actuator based on the detection information of the rotation angle sensor, making it possible to operate each of the driving brakes 45, 46 using the brake pedal 47.

[0042] When the brake pedal 47 is not operated (the foot is off), it is supported by the second pedal support mechanism 48 in the position shown by the solid lines in Figures 5 and 6, and when it is depressed to its operating limit, it is supported by the second pedal support mechanism 48 in the position shown by the two-dot chain lines in Figures 5 and 6.

[0043] 5 and 6, the second pedal support mechanism 48 is supported by a support part 49 provided on the vehicle body in a state in which its mounting position relative to the support part 49 can be changed, similar to the first pedal support mechanism 25 of the accelerator pedal 24. The second pedal support mechanism 48 is configured so that the mounting position of the second pedal support mechanism 48 relative to the support part 49 can be changed, thereby changing the position of the brake pedal 47 relative to the vehicle body.

[0044] The second pedal support mechanism 48 and the seat support body 20 of the driver's seat 6 are linked by a second linkage mechanism 50. The second linkage mechanism 50 has the same configuration as the first linkage mechanism 27 of the accelerator pedal 24.

[0045] 5 shows the respective states of the second linkage mechanism 50 and the second pedal support mechanism 48 when the driver's seat 6 is adjusted to the rearmost mounting position among the adjustable mounting positions, and the attitude of the brake pedal 47 relative to the vehicle body in a non-operated state (attitude relative to the vehicle body). When the driver's seat 6 is adjusted to the rearmost mounting position, the brake pedal 47 in a non-operated state assumes the attitude relative to the vehicle body indicated by the line B1. FIG. 6 shows the respective states of the second linkage mechanism 50 and the second pedal support mechanism 48 when the driver's seat 6 is adjusted to the forwardmost mounting position among the adjustable mounting positions, and the attitude of the brake pedal 47 relative to the vehicle body in a non-operated state (attitude relative to the vehicle body). When the driver's seat 6 is adjusted to the forwardmost mounting position, the brake pedal 47 in a non-operated state assumes the attitude relative to the vehicle body indicated by the line B2.

[0046] As shown in Figures 5 and 6, the inclination angle β1 of the brake pedal 47 relative to the driver's floor 58 when the brake pedal 47 is in the vehicle body position indicated by the straight line B1 is steeper than the inclination angle β2 of the brake pedal 47 relative to the driver's floor 58 when the brake pedal 47 is in the vehicle body position indicated by the straight line B2. As shown in Figures 5 and 6, when the driver's seat 6 is adjusted to a rearward position, the second pedal support mechanism 48 is operated by the second linkage mechanism 50 to be used for the rear seat, and the position of the brake pedal 47 in a non-operated state relative to the vehicle body when the driver's seat 6 is adjusted to a rearward position is made lower than the position of the brake pedal 47 in a non-operated state relative to the vehicle body when the driver's seat 6 is adjusted to a forward position, and when the driver's seat 6 is adjusted to a frontward position, the second pedal support mechanism 48 is operated by the second linkage mechanism 50 to be used for the front seat, and the position of the brake pedal 47 in a non-operated state relative to the vehicle body when the driver's seat 6 is adjusted to a frontward position is made higher than the position of the brake pedal 47 in a non-operated state relative to the vehicle body when the driver's seat 6 is adjusted to a rearward position.

[0047] When the driver's seat 6 is fixed to the adjustment target mounting position, the second pedal support mechanism 48 is fixed to the support part 49 by being supported by the driver's seat 6 via the second linkage mechanism 50. As a result, even if the brake pedal 47 is operated, the second pedal support mechanism 48 does not move, and the brake pedal 47 can be depressed.

[0048] 5 and 6, the second pedal support mechanism 48 is configured with a second pedal support member 51 having the same configuration as the first pedal support member 28 of the accelerator pedal 24. The second pedal support member 51 is supported by a support portion 49 in a state in which it can be pivoted about a pivot axis P2 that is parallel to the fulcrum axis Z2.

[0049] When the second pedal support member 51 is operated to swing about the pivot axis P2 as a swing fulcrum, the mounting position relative to the support portion 49 is changed, and the position relative to the vehicle body when the brake pedal 47 is in a non-operated state is changed.

[0050] As shown in FIGS. 5 and 6, the second link mechanism 50 is configured by a second link mechanism 52 having the same configuration as the first link mechanism 30 of the accelerator pedal 24.

[0051] 5 , in the second link mechanism 52, when the driver's seat 6 is moved rearward, the movement of the driver's seat 6 causes the second seat-side swing link 53 to swing in a clockwise swing direction (swing direction indicated by arrow a) around the fulcrum shaft 54, and the second interlocking link 55 is moved forward by the second seat-side swing link 53, and the second pedal-side swing link 56 is pushed by the second interlocking link 55 and swings in a clockwise swing direction (swing direction indicated by arrow b) around the fulcrum shaft 57. That is, in the second link mechanism 52, the rearward movement of the driver's seat 6 is transmitted to the second pedal support member 51 by the second seat-side swing link 53, the second interlocking link 55, and the second pedal-side swing link 56, and the second pedal support member 51 is swingable in a clockwise swing direction relative to the support portion 49.

[0052] As a result, as shown in Figure 5, when the driver's seat 6 is adjusted to a rearward position, the rearward movement of the driver's seat 6 is transmitted to the second pedal support member 51 by the second link mechanism 52, and the mounting position of the second pedal support member 51 relative to the support portion 49 is adjusted for the rear of the seat.

[0053] 6 , in the second link mechanism 52, when the driver's seat 6 is moved forward, the movement of the driver's seat 6 causes the second seat-side swing link 53 to swing in a counterclockwise swing direction (swing direction indicated by arrow c) around the fulcrum shaft 54, and the second interlocking link 55 is moved rearward by the second seat-side swing link 53, and the second pedal-side swing link 56 is pulled by the second interlocking link 55 and swings in a counterclockwise swing direction (swing direction indicated by arrow d) around the fulcrum shaft 57. That is, in the second link mechanism 52, the forward movement of the driver's seat 6 is transmitted to the second pedal support member 51 by the second seat-side swing link 53, the second interlocking link 55, and the second pedal-side swing link 56, and the second pedal support member 51 is swingable in a counterclockwise swing direction relative to the support portion 49.

[0054] As a result, as shown in Figure 6, when the driver's seat 6 is adjusted to a forward position, the forward movement of the driver's seat 6 is transmitted to the second pedal support member 51 by the second link mechanism 52, and the mounting position of the second pedal support member 51 relative to the support portion 49 is adjusted for the front side of the seat.

[0055] In the case of a short driver, the driver's seat 6 is adjusted to a forward position and the driver sits there, and the accelerator pedal 24 and the brake pedal 47 are depressed with their pedals pointing slightly downward. However, when the driver's seat 6 is adjusted to a forward position, the accelerator pedal 24 and the brake pedal 47 are not operated in a position relative to the vehicle body that is more upward than the accelerator pedal 24 and the brake pedal 47 are in a position relative to the vehicle body that is relative to the vehicle body that is when the driver's seat 6 is adjusted to a rearward position, and the accelerator pedal 24 and the brake pedal 47 can be operated in a state in which the depression force is efficiently transmitted to the accelerator pedal 24 and the brake pedal 47.

[0056] In the case of a tall driver, the driver's seat 6 is adjusted to a rearward position and the driver sits there, and the accelerator pedal 24 and the brake pedal 47 are depressed facing slightly forward. However, when the driver's seat 6 is adjusted to a rearward position, the attitude of the accelerator pedal 24 and the brake pedal 47 relative to the vehicle body when they are not being operated is more downward than the attitude of the accelerator pedal 24 and the brake pedal 47 relative to the vehicle body when the driver's seat 6 is adjusted to a forward position, and the accelerator pedal 24 and the brake pedal 47 can be operated in a state in which the depression force is efficiently transmitted to the accelerator pedal 24 and the brake pedal 47.

[0057] In this embodiment, the first interlocking link 35 passes below the accelerator pedal 24 in the fore-and-aft direction of the vehicle body, and the second interlocking link 55 passes below the brake pedal 47 in the fore-and-aft direction of the vehicle body, but it is also possible to use a first interlocking link 35 that passes in the fore-and-aft direction, bypassing the accelerator pedal 24 laterally, and it is also possible to use a second interlocking link 55 that passes in the fore-and-aft direction, bypassing the brake pedal 47 laterally.

[0058] In this embodiment, the first interlocking link 35 passes below the driver's floor 58 in the fore-and-aft direction of the vehicle body, and the second interlocking link 55 passes below the driver's floor 58 in the fore-and-aft direction of the vehicle body, but it is also possible to use the first interlocking link 35 and the second interlocking link 55 that pass above the driver's floor 58 in the fore-and-aft direction and are covered by a cover member.

[0059] [Another embodiment] (1) In the above embodiment, examples have been shown in which the operating pedals are the accelerator pedal 24 and the brake pedal 47. However, this is not limited to this, and various pedals whose operation targets are different from the accelerator device 23 and the running brakes 45, 46, such as a differential lock pedal for operating the differential mechanism to a locked state, may also be adopted as the operating pedal.

[0060] (2) Although an example has been shown in which a single first pedal support member 28 is used as the first pedal support mechanism 25 and a single second pedal support member 51 is used as the second pedal support mechanism 48, the present invention is not limited to this example, and the first pedal support mechanism 25 and the second pedal support mechanism 48 may be configured by combining a vehicle body side member and a pedal side member that is separate from the vehicle body side member.

[0061] (3) Although the example has been shown in which the first link mechanism 30 is employed as the first link mechanism and the second link mechanism 52 is employed as the second link mechanism 50, the present invention is not limited to this. The first link mechanism 27 may be an electric link mechanism that links the first pedal support mechanism 25 and the driver's seat 6 by an actuator that operates the first pedal support mechanism 25, a position detection sensor that detects the adjusted position of the driver's seat 6, and a control device that operates the actuator based on the detection result of the position detection sensor. The second link mechanism 50 may be an electric link mechanism that links the second pedal support mechanism 48 and the driver's seat 6 by an actuator that operates the second pedal support mechanism 48, a position detection sensor that detects the adjusted position of the driver's seat 6, and a control device that operates the actuator based on the detection result of the position detection sensor.

[0062] (4) In the above embodiment, an example is shown in which the first pedal support mechanism 25 and the second pedal support mechanism 48 are provided separately, and the first linkage mechanism 27 and the second linkage mechanism 50 are provided separately, so that the change in the attitude of the accelerator pedal 24 relative to the vehicle body in conjunction with the adjustment of the position of the driver's seat 6 and the change in the attitude of the brake pedal 47 relative to the vehicle body in conjunction with the adjustment of the position of the driver's seat 6 are performed separately. However, a pedal support mechanism that supports the accelerator pedal 24 and the brake pedal 47 collectively while allowing the accelerator pedal 24 and the brake pedal 47 to be operated separately, and a linkage mechanism that links this pedal support mechanism to the driver's seat 6 may be provided, so that the change in the attitude of the accelerator pedal 24 relative to the vehicle body in conjunction with the adjustment of the position of the driver's seat 6 is performed in conjunction with the adjustment of the position of the driver's seat 6. [Industrial Applicability]

[0063] The present invention can be applied to a work vehicle equipped with a driver's seat whose position can be adjusted in the fore-and-aft direction of the vehicle body, and an operating pedal that is located in front of and below the driver's seat and is operated to swing around a fulcrum axis that extends in the width direction of the vehicle body. [Explanation of symbols]

[0064] 6 Driver's seat 10 Engine 23 Accelerator 24 Accelerator pedal (operating pedal) 24b Rotating shaft 25 First pedal support mechanism (pedal support mechanism) 27 First Linkage Mechanism (Linkage Mechanism) 28 Pedal support member (first pedal support member) 30 First link mechanism (link mechanism) 32 First seat side rocking link (seat side rocking link) 34 First pedal side swing link (pedal side swing link) 35 First Link (Link) 45 Running brake 46 Running brake 47 Brake pedal (operating pedal) 47b Rotating shaft 48 Pedal support mechanism (second pedal support mechanism) 50 Second Linkage Mechanism (Linkage Mechanism) 51 second pedal support member (pedal support member) 52 Second link mechanism (link mechanism) 53 Second seat side rocking link (seat side rocking link) 55 Second Link (Link) 56 Second pedal side swing link (pedal side swing link) 58 Driver's floor P1 Pivot axis P2 Pivot axis Z1 fulcrum shaft center Z2 Fulcrum axis center

Claims

1. A driver's seat that can be adjusted in position in the fore-and-aft direction of the vehicle body; A driver's floor; an operation pedal provided in front of and below the driver's seat and swingable about a pivot axis extending in the vehicle width direction; a pedal support mechanism that supports the operation pedal in a state in which the attitude of the operation pedal relative to the vehicle body can be changed when the operation pedal is not operated; a linking mechanism that links the driver's seat and the pedal support mechanism, When the driver's seat is adjusted to a forward position, the pedal support mechanism is operated by the linkage mechanism so that the vehicle body posture in the non-operated state of the operation pedal in this case is more upward than the vehicle body posture in the non-operated state of the operation pedal in the case where the driver's seat is adjusted to a rearward position, and when the driver's seat is adjusted to a rearward position, the pedal support mechanism is operated by the linkage mechanism so that the vehicle body posture in the non-operated state of the operation pedal in this case is more downward than the vehicle body posture in the non-operated state of the operation pedal in the case where the driver's seat is adjusted to a forward position, the linking mechanism includes a linking mechanism that links the driver's seat and the pedal support mechanism, The interlocking mechanism is passed under the driver's floor in the longitudinal direction of the vehicle body of the work vehicle.

2. The operation pedal is provided with a rotational support shaft having the fulcrum axis, 2. The work vehicle according to claim 1, wherein the pedal support mechanism is a pedal support member that is swingably supported on the vehicle body via a pivot axis that is parallel to the fulcrum axis while rotatably supporting the rotational support shaft.

3. 3. The work vehicle according to claim 2, wherein the linking mechanism is a link mechanism that links the driver's seat and the pedal support member together.

4. 4. The work vehicle according to claim 3, wherein the link mechanism comprises a seat-side swing link connected to the driver's seat and swingable by changing the position of the driver's seat, a pedal-side swing link connected to the pedal support member and swinging the pedal support member, and an interlocking link as the interlocking mechanism connected to the seat-side swing link and the pedal-side swing link to interlock the seat-side swing link and the pedal-side swing link.

5. 5. The work vehicle according to claim 4, wherein the interlocking link is passed below the operating pedal in the longitudinal direction of the vehicle body.

6. The operation pedals include an accelerator pedal for operating an engine accelerator device and a brake pedal for operating a running brake, The pedal support mechanism includes a first pedal support mechanism that supports the accelerator pedal and a second pedal support mechanism that supports the brake pedal, 2. The work vehicle according to claim 1, wherein the linking mechanism includes a first linking mechanism that links the first pedal support mechanism and the driver's seat, and a second linking mechanism that links the second pedal support mechanism and the driver's seat.

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