JP7809045B2 - Work vehicle - Google Patents

Description

The present invention relates to a work vehicle.

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 operating pedal that is located below and in front of the driver's seat and is operated to swing around a pivot axis that extends in the width direction of the vehicle body.

JP 2010-252853 A

In the work vehicles described above, tall drivers generally 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 work vehicles whose control pedals are easy to operate for both tall and short drivers.

The present invention provides a work vehicle that allows both short and tall drivers to easily operate the control pedals, and that makes it easy to operate the control pedals.

The work vehicle according to the present invention comprises:
The vehicle is provided with a driver's seat whose position can be adjusted in the longitudinal direction of the vehicle body, a driver's floor , an operating pedal provided in front of and below the driver's seat and which is operated to swing around a pivot axis extending in the width direction of the vehicle body as a swing fulcrum, a pedal support mechanism which supports the operating pedal in a state in which the attitude of the operating pedal relative to the vehicle body when the operating pedal is not operated can be changed, and a linking mechanism which links the driver's seat and the pedal support mechanism, and in which, when the driver's seat is adjusted to a forward position, the attitude of the operating pedal relative to the vehicle body when the operating pedal is not operated in this case is adjusted to a position in which the attitude of the operating pedal relative to the vehicle body when the driver's seat is adjusted to a rearward position is changed The pedal support mechanism is operated by the linkage mechanism so that its position relative to the vehicle body is more upward than its vehicle body 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 its position relative to the vehicle body when the operating pedal is not operated in this case is more downward than its position relative to the vehicle body when the operating pedal is not operated when the driver's seat is adjusted to a forward position , and the linkage mechanism is equipped with a linkage mechanism that links the driver's seat and the pedal support mechanism, and the linkage mechanism passes under the driver's section floor in the fore-and-aft direction of the vehicle body .

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.

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.

With this configuration, the pedal support mechanism can be a simple structure that only includes a pedal support member, making it possible to inexpensively obtain an operating pedal that is easy to operate regardless of height.

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

With this configuration, the power for changing the driver's seat position can be transmitted to the pedal support mechanism via a link mechanism, thereby operating the pedal support mechanism. This eliminates the need for a special actuator to operate the pedal support mechanism, making it possible to inexpensively obtain an operating pedal that is easy to operate regardless of height.

In the present invention,
It is preferable that 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 an interlocking link that serves as the interlocking 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.

With 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, making it possible to inexpensively obtain an operating pedal that is easy to operate regardless of height.

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

This configuration makes it easy to position the interlocking link so that it does not interfere with the operation of the operating pedal.

In the present invention,
It is preferable that the operating pedals include an accelerator pedal for operating the engine accelerator device and a brake pedal for operating the driving brake, that the pedal support mechanisms include 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 mechanisms include 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.

With 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 easily operate both the accelerator pedal and the brake pedal regardless of height.

FIG. FIG. 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. 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. 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. 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 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 will be referred to as the "front side of the vehicle body," the direction of arrow B shown in Figures 1 and 2 will be referred to as the "rear side of the vehicle body," the direction of arrow U shown in Figure 1 will be referred to as the "upper side of the vehicle body," the direction of arrow D shown in Figure 1 will be referred to as the "lower side of the vehicle body," the direction of arrow L shown in Figure 2 will be referred to as the "left side of the vehicle body," and the direction of arrow R shown in Figure 2 will be referred to as the "right side of the vehicle body." The left-right direction of the vehicle body corresponds to the width direction of the vehicle body.

[Overall configuration of the multipurpose work vehicle]
As shown in Figures 1 and 2, the multipurpose work vehicle includes a traveling body 3 supported by a pair of left and right drivable and steerable front wheels 1 and a pair of left and right drivable rear wheels 2. 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 includes a driver's seat 6, a steering wheel 7 for steering the front wheels 1, and a rope 8 enclosing a 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 for speed change, 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 via 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 connecting the front wheel output shaft 13 to an input shaft 15 of the front wheel drive case 14 by a rotating shaft 16.

[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 passenger 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 passenger space, but it can also be provided on the right side of the vehicle body or in the center of the passenger 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.

Specifically, as shown in FIG. 3, the position adjustment mechanism 18 includes a guide rail 19 attached to the seat support portion 17 and a seat support 20 attached to the bottom of the driver's seat 6. The seat support 20 is supported on the guide rail 19 so that it can slide in the fore-and-aft direction of the vehicle. The range within which the seat support 20 can slide relative to the guide rail 19 is set as the adjustment range T (see FIGS. 3 and 4) within 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 20. The positioning mechanism 21 can be switched between a locked state, in which the seat support 20 is fixed to the guide rail 19 at any position in the fore-and-aft direction of the vehicle, and a released state, in which the seat support 20 is released from the guide rail 19. A positioning lever 22 is provided on the side of the driver's seat 6, which can be operated to switch the positioning mechanism 21 between the locked state and the released state.

The position of the driver's seat 6 is adjusted based on the following operating procedure.
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 target mounting position for adjustment, 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 target mounting position for adjustment.

[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 rotational support shaft 24b connected to the upper portion of the pedal arm 24a. The rotational 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 rotational 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.

The accelerator pedal 24 is connected to the accelerator device 23 via a rotation angle sensor (not shown) linked to the rotational support shaft 24b, an accelerator control device (not shown) connected to the rotational angle sensor, and an accelerator actuator (not shown) provided on the accelerator device 23, allowing operation of the accelerator device 23 via the accelerator pedal 24. That is, when the accelerator pedal 24 is operated, the rotation angle of the rotational support shaft 24b relative to the first pedal support mechanism 25 is detected by the rotational angle sensor as the operation stroke of the accelerator pedal 24. Based on the detection information from the rotational angle sensor, the accelerator control device controls the accelerator actuator, and the accelerator actuator operates the accelerator device 23 to a rotational speed corresponding to the operation position of the accelerator pedal 24.

When the accelerator pedal 24 is not operated (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. 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.

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

Figure 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 of its adjustable mounting positions, and the attitude of the accelerator pedal 24 relative to the vehicle body when it is not operated (attitude relative to the vehicle body). When the driver's seat 6 is adjusted to the rearmost mounting position, the accelerator pedal 24 in its non-operated state assumes the attitude relative to the vehicle body indicated by line A1. Figure 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 of its adjustable mounting positions, and the attitude of the accelerator pedal 24 relative to the vehicle body when it is not operated (attitude relative to the vehicle body). When the driver's seat 6 is adjusted to the forwardmost mounting position, the accelerator pedal 24 in its non-operated state assumes the attitude relative to the vehicle body indicated by line A2.

As shown in Figures 3 and 4, the inclination angle α1 of the accelerator pedal 24 relative to the driver's floor 58 when the accelerator pedal 24 is in the vehicle body position indicated by line A1 is steeper than the inclination angle α2 of the accelerator pedal 24 relative to the driver's floor 58 when the accelerator pedal 24 is in the vehicle body position indicated by line A2. As shown in Figures 3 and 4, when the driver's seat 6 is adjusted forward, the first pedal support mechanism 25 is operated by the first linkage mechanism 27 to operate for the front seat, and the vehicle body position of the accelerator pedal 24 in a non-operated state when the driver's seat 6 is adjusted forward is made more upward than the vehicle body position of the accelerator pedal 24 in a non-operated state when the driver's seat 6 is adjusted rearward. When the driver's seat 6 is adjusted to the rear, the first pedal support mechanism 25 is operated by the first linkage mechanism 27 to operate for the rear seat, and the position of the accelerator pedal 24 relative to the vehicle body when it is not operated when the driver's seat 6 is adjusted to the rear is made more downward than the position of the accelerator pedal 24 relative to the vehicle body when it is not operated when the driver's seat 6 is adjusted to the front.

When the driver's seat 6 is fixed in the target adjustment position, the first pedal support mechanism 25 is fixed to the support part 26 by support from 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, allowing the accelerator pedal 24 to be depressed.

Specifically, as shown in FIG. 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 the 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 the pivot axis Z1, which is the axis of the rotational support shaft 24b.

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 in a state in which it can be pivoted parallel to the fulcrum axis Z1, with the pivot axis P1 provided on the pivot shaft 29 serving as the pivot point. As shown in FIGS. 3 and 4, when the first pedal support member 28 is pivoted around 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.

As shown in FIG. 3, the first linkage mechanism 27 is composed 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 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.

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

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 via a fulcrum shaft 39 on a support portion 38 provided on the vehicle body. The first pedal side swing link 34 is supported on the vehicle body in a swingable state with the fulcrum shaft 39 as the swing fulcrum.

As shown in FIG. 3, the front portion of the first interlocking link 35 is swingably connected to a portion of the first pedal-side swing link 34 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 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.

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 direction (swing direction indicated by arrow a) around the fulcrum shaft 37, causing the first interlocking link 35 to move 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 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, causing the first pedal support member 28 to swing 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 rearward position of the seat.

In the first link mechanism 30, as shown in FIG. 4, 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, causing the first interlocking link 35 to move rearward by the first seat-side swing link 32, and the first pedal-side swing link 34 to swing 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, causing the first pedal support member 28 to swing toward the front of the seat. 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 of the seat.

[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.

As shown in FIG. 5, the brake pedal 47 includes a pedal arm 47a extending upward from the rear 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 the 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 pivot axis Z2 extending in the vehicle width direction, and is supported by a support portion 49 of the vehicle body via the second pedal support mechanism 48. The pivot axis Z2 is provided on the rotary support shaft 47b.

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 rotary support shaft 47b relative to the second pedal support mechanism 48 as the operating 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 from the rotation angle sensor, allowing each of the driving brakes 45, 46 to be operated by the brake pedal 47.

When the brake pedal 47 is not operated (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. 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.

As shown in Figures 5 and 6, the second pedal support mechanism 48, like the first pedal support mechanism 25 for the accelerator pedal 24, 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. The second pedal support mechanism 48 is configured to change the position of the brake pedal 47 relative to the vehicle body by changing its mounting position relative to the support part 49.

The second pedal support mechanism 48 and the seat support member 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.

Figure 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 of its adjustable mounting positions, and the attitude of the brake pedal 47 relative to the vehicle body (body attitude) when not operated. When the driver's seat 6 is adjusted to the rearmost mounting position, the brake pedal 47 in its unoperated state assumes the body attitude indicated by line B1. Figure 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 of its adjustable mounting positions, and the attitude of the brake pedal 47 relative to the vehicle body (body attitude) when not operated. When the driver's seat 6 is adjusted to the forwardmost mounting position, the brake pedal 47 in its unoperated state assumes the body attitude indicated by line B2.

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 become the rear seat position, 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; 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 become the front seat position, 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.

When the driver's seat 6 is fixed in the target adjustment position, the second pedal support mechanism 48 is fixed to the support part 49 by support from 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, allowing the brake pedal 47 to be operated.

Specifically, as shown in Figures 5 and 6, the second pedal support mechanism 48 is composed of 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 the support part 49 in a state in which it can be pivoted around a pivot axis P2, which is parallel to the fulcrum axis Z2.

When the second pedal support member 51 is pivoted around the pivot axis P2, its mounting position relative to the support portion 49 is changed, thereby changing the position of the brake pedal 47 relative to the vehicle body when it is not being operated.

As shown in Figures 5 and 6, the second linkage mechanism 50 is composed of a second linkage mechanism 52 having the same configuration as the first linkage mechanism 30 of the accelerator pedal 24.

In the second link mechanism 52, as shown in FIG. 5 , 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 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. The second pedal-side swing link 56 is pushed by the second interlocking link 55 and swings in a clockwise direction (swing direction indicated by arrow b) around the fulcrum shaft 57. In other words, 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 direction relative to the support portion 49.

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 rearward position of the seat.

In the second link mechanism 52, as shown in FIG. 6 , 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 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. The second pedal-side swing link 56 is pulled by the second interlocking link 55 and swings in a counterclockwise direction (swing direction indicated by arrow d) around the fulcrum shaft 57. In other words, 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 direction relative to the support portion 49.

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 of the seat.

For a short driver, the driver's seat 6 is adjusted to a forward position and the accelerator pedal 24 and brake pedal 47 are operated with their pedals pointing slightly downward. However, when the driver's seat 6 is adjusted to a forward position, the accelerator pedal 24 and brake pedal 47 are positioned relative to the vehicle body when not in operation, more upward than when the driver's seat 6 is adjusted to a rearward position. This allows the accelerator pedal 24 and brake pedal 47 to be operated in a state where the pedaling force is efficiently transmitted to the accelerator pedal 24 and brake pedal 47.

For a tall driver, the driver's seat 6 is adjusted to a rearward position and the accelerator pedal 24 and brake pedal 47 are operated facing slightly forward. However, when the driver's seat 6 is adjusted to a rearward position, the accelerator pedal 24 and brake pedal 47 are positioned relative to the vehicle body when not in operation, more downward than when the driver's seat 6 is adjusted to a forward position. This allows the accelerator pedal 24 and brake pedal 47 to be operated in a state where the pedaling force is efficiently transmitted to the accelerator pedal 24 and brake pedal 47.

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 a second interlocking link 55 that passes in the fore-and-aft direction, bypassing the brake pedal 47 laterally.

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 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.

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

(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, this is not limiting, 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 separate from the vehicle body-side member.

(3) While the example shown above employs the first link mechanism 30 as the first link mechanism and the second link mechanism 52 as the second link mechanism 50, this is not limiting. 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 using 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 results 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 using 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 results of the position detection sensor.

(4) In the above embodiment, 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, and a configuration is shown in which the position of the accelerator pedal 24 relative to the vehicle body is changed in conjunction with the adjustment of the position of the driver's seat 6, and the position of the brake pedal 47 relative to the vehicle body is changed 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 position of the brake pedal 47 relative to the vehicle body is changed in conjunction with the adjustment of the position of the driver's seat 6.

The present invention can be applied to a work vehicle equipped with a driver's seat that can be adjusted in position in the fore-and-aft direction of the vehicle body, and an operating pedal that is located below and in front of the driver's seat and that can be swung around a pivot axis that extends in the width direction of the vehicle body.

6 Driver's seat 10 Engine 23 Accelerator device 24 Accelerator pedal (operation pedal)
24b Rotating support 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 interlocking link (interlocking link)
45 Traveling brake 46 Traveling brake 47 Brake pedal (operating pedal)
47b Rotation support 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 interlocking link (interlocking link)
56 Second pedal side swing link (pedal side swing link)
58 Driver's floor
P1 Pivot axis P2 Pivot axis Z1 Fulcrum axis Z2 Fulcrum axis

Claims (6)

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. 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. The work vehicle described in claim 2, wherein the linking mechanism is a link mechanism that interlocks and connects the driver's seat and the pedal support member. 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. A work vehicle as described in claim 4, wherein the interlocking link passes below the operating pedal in the fore-and-aft direction of the vehicle body. 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.