JP2020121665A - Operation mechanism of working vehicle - Google Patents

Abstract

To provide an operation mechanism of a working vehicle which can improve operability of an operation part.SOLUTION: An operation mechanism includes an operation part 40 having an operation surface 41 depressed by a foot of a driver, and a rotation support part 51 which rotatably supports the operation part 40 around an axial line extending laterally. The operation surface 41 includes a left side protrusion part 43a which is formed on a left part of the operation surface 41 and is formed so as to protrude to a left side, and a right side protrusion part 43b which is formed on a right part of the operation surface 41 and is formed so as to protrude to a right side.SELECTED DRAWING: Figure 6

Description

TECHNICAL FIELD The present invention relates to a technique of an operation mechanism of a work vehicle including an operation unit that can be depressed by a driver's foot.

Conventionally, a technique of an operation mechanism of a work vehicle including an operation unit that can be depressed by a driver's foot has been known. For example, it is as described in Patent Document 1.

The operation mechanism of the tractor (work vehicle) described in Patent Document 1 includes an accelerator pedal provided at the foot of the driver. The accelerator pedal includes a substantially plate-shaped operation portion having an operation surface with the plate surface facing upward and rearward. The front portion of the operation portion is rotated downward when the operation surface is depressed.

Generally, when depressing the accelerator pedal, the accelerator pedal is strongly pushed near the base of the thumb of the foot (right foot). Further, if the accelerator pedal is pushed further on the toe side of the foot in order to deepen the depression, the accelerator pedal will be pushed strongly even on the little finger side. As described above, when the accelerator pedal is depressed, it is easy to apply a force to the accelerator pedal from the vicinity of the base of the thumb (front left portion) and the side of the little finger (front right portion).
The operation surface of the accelerator pedal described in Patent Document 1 has a constant left and right width and is formed in a substantially rectangular shape in a front and rear direction in a slender plan view. In such a configuration, the left front part and the right front part (the part where force is easily applied to the accelerator pedal) of the foot may protrude from the operation surface, and it may be difficult to operate the operation part. Therefore, there is room for improvement in the operability of the operation unit.

JP, 2005-101301, A

The present invention has been made in view of the above circumstances, and a problem to be solved by the present invention is to provide an operating mechanism of a work vehicle capable of improving the operability of an operating unit.

The problem to be solved by the present invention is as described above, and the means for solving this problem will be described below.

That is, according to the first aspect of the present invention, there is provided an operation section having an operation surface which is operated by a driver's foot, and a rotation support section which supports the operation section so as to be rotatable about an axis extending in the left and right directions. The operation surface is formed on the left side of the operation surface, and is formed on the left side of the operation surface, and is formed on the right side of the operation surface. And a right side protruding portion formed to have

In the second aspect, the right side protruding portion is located in front of the left side protruding portion.

In Claim 3, it is located in a portion between the left side protruding portion and the right side protruding portion in the front-rear direction, extends downward from the operating portion, and is predetermined when the operating surface is depressed by a predetermined angle. It further comprises an abutting portion that abuts the member.

In claim 4, the abutting portion is located on the left front portion of the operating portion.

In claim 5, the operation surface is formed on at least a front end portion of the operation surface, and is formed on a convex portion formed in an upwardly convex R shape and a portion excluding the convex portion. In addition, a flat portion formed in a flat shape is further provided, and the convex portion is formed in an R shape along a circumference in contact with a straight line along the flat portion at a front end of the flat portion. It is a thing.

In the sixth aspect, the left side protruding portion and the right side protruding portion are formed on the convex portion.

In the seventh aspect, the convex portion is formed from the front end portion to the rear portion of the operation surface.

In the eighth aspect, when the operation surface is stepped on by the predetermined angle, the direction of the tangent line passing through the front end portion of the convex portion substantially coincides with the horizontal direction.

In the ninth aspect, the front end of the flat portion is located at a position higher than the step of the driver placing his/her foot.

The friction member according to claim 10, wherein a frictional force is generated between the rotation member that rotates as the operation surface is depressed and the rotation member when the rotation member tries to rotate. And are further provided.

In the eleventh aspect, a pair of the friction members are provided so as to sandwich the rotation member on the rotation axis of the rotation member.

13. The rotating member according to claim 12, wherein one side is swingably connected to the operation portion and the other side is connected to the rotating member, and the rotating member is rotated as the operation surface is stepped on. The connecting member is further provided, and the connecting member swings with respect to the operation portion so as to approach the axis of the rotation support portion when the operation surface is stepped on.

According to a thirteenth aspect, the invention further comprises a first urging member that presses the friction member against the rotating member, and an adjusting member that adjusts the urging force of the first urging member.

15. The second biasing member according to claim 14, further comprising a second biasing member that biases the rotating member in a direction opposite to a direction in which the rotating member rotates as the operation surface is depressed. The rotating member, the first urging member, and the second urging member are arranged so as to be aligned in a predetermined direction.

According to a fifteenth aspect, the present invention further comprises a detection member which is arranged on the left and right sides of the work vehicle with respect to the adjustment member and which detects a rotation amount of the rotation member.

In the sixteenth aspect, the rotating member, the first urging member, and the second urging member are attached, and a fixing member that is fixed when the driver puts his/her foot is further provided.

The effects of the present invention are as follows.

In claim 1, the operability can be improved.

According to the second aspect, the operability can be effectively improved.

According to the third aspect, it is possible to suppress deformation and damage of the operation portion.

According to the fourth aspect, it is possible to effectively suppress deformation and damage of the operation portion.

According to the fifth aspect, the operation unit can be operated smoothly.

According to the sixth aspect, the operation section can be operated more smoothly.

According to the seventh aspect, the operation unit can be operated more smoothly.

According to the eighth aspect, when the operation surface is depressed by a predetermined angle, the weight can be applied from directly above the operation surface to facilitate the depression.

According to the ninth aspect, the flat portion can be applied to the heel of the driver.

According to the tenth aspect, the operation feeling of the operation section can be improved.

According to the eleventh aspect, the resistance generated when the operation surface is depressed can be effectively increased.

According to the twelfth aspect, it is possible to prevent the connecting member from coming into contact with surrounding members when the operation surface is stepped on.

According to the thirteenth aspect, the resistance generated when the operation surface is depressed can be adjusted.

In claim 14, a second urging member that exerts an urging force that returns to a position before the operation surface is depressed, a first urging member, and a second urging member are arranged in a line for assembly and maintenance. Can be made easier.

According to the fifteenth aspect, it is possible to prevent the detection member from interfering with the adjustment member when adjusting the urging force of the first urging member.

According to the sixteenth aspect, the assembly and the maintenance can be performed more easily.

The side view showing the whole tractor composition concerning one embodiment of the present invention. Similarly, a plan view. The top view which showed the structure inside the cabin. A side view showing composition around a steering wheel and a seat. The expanded side view which showed the structure of the step periphery. The rear view which showed the accelerator operating mechanism. Similarly, a side view. AA sectional drawing. The perspective view which showed the accelerator pedal. (A) Similarly, a plan view. (B) Similarly, a side view. The side view which showed the relationship of a flat part and a convex part. The side view which showed the accelerator operating mechanism in the state where the operating surface was stepped on. The side view which showed the accelerator pedal in the state where the operation surface was pushed down most.

Hereinafter, the accelerator operating mechanism 20 of the tractor 1 according to the embodiment of the present invention will be described.

First, the overall configuration of the tractor 1 will be described with reference to FIGS. 1 to 5.

The tractor 1 mainly includes a body frame 2, an engine 3, a hood 4, a muffler 5, a transmission case 6, a front wheel 7, a rear wheel 8, a fender 9, a lifting device 10, a cabin 11, a steering wheel 12, a seat 13, a step 14, an armrest. 15, the side console 16 and the like.

The machine body frame 2 is a frame-shaped member formed by appropriately combining a plurality of plate materials. The machine body frame 2 is formed in a substantially rectangular shape in a plan view. The machine body frame 2 is arranged in the front part of the tractor 1 with its longitudinal direction oriented in the front-rear direction. An engine 3 is fixed to the rear portion of the machine body frame 2. The engine 3 is covered by the hood 4. A muffler 5 that discharges exhaust gas of the engine 3 is arranged on the right side of the hood 4. A transmission case 6 is fixed to the rear part of the engine 3.

The front part of the machine body frame 2 is supported by a pair of left and right front wheels 7 via a front axle mechanism (not shown). The rear part of the transmission case 6 is supported by a pair of left and right rear wheels 8 via a rear axle mechanism (not shown). The pair of left and right rear wheels 8 are covered with a fender 9 from substantially above.

An elevating device 10 is provided at the rear of the transmission case 6. Various working devices (for example, a cultivator or the like) can be attached to the lifting device 10. The elevating device 10 can elevate and lower the attached working device by an actuator such as a hydraulic cylinder. The power of the engine 3 can be transmitted to the lifting device 10 via a PTO shaft (not shown).

The power of the engine 3 is transmitted to a front wheel 7 via the front axle mechanism after being speed-changed by a transmission (not shown) housed in the transmission case 6, and is also transmitted to the rear wheel 8 via the rear axle mechanism. Can be transmitted to. The front wheels 7 and the rear wheels 8 are rotationally driven by the power of the engine 3, and the tractor 1 can travel. Further, the power of the engine 3 can drive the work device mounted on the lifting device 10.

A cabin 11 is provided behind the engine 3. Inside the cabin 11, a living space for a driver to board is formed. A steering wheel 12 for adjusting the turning angle of the front wheels 7 is arranged at the front of the cabin 11. A seat 13 for a driver to sit on is arranged substantially in the center of the cabin 11. In the lower part of the cabin 11, a step 14 (see FIG. 4) for the driver sitting on the seat 13 to put his/her foot is arranged. An armrest 15 is arranged on the right side of the seat 13. A side console 16 is arranged on the right side of the cabin 11 (on the right outside of the armrest 15). Various operation tools are appropriately arranged on the armrest 15 and the side console 16. Further, as shown in FIG. 5, the side console 16 is formed with an opening 16a which is opened from the left side surface to the front side surface thereof. The side console 16 is configured to be able to maintain electrical equipment such as a relay box 16b and a fuse box 16c provided inside through the opening 16a. The opening 16a of the side console 16 is closed by a cover 16d shown in FIG. 4 except during maintenance.

Further, as shown in FIGS. 4 and 5, various pedals such as an accelerator pedal 30 for adjusting the rotation speed of the engine 3 are arranged below the steering wheel 12.

Next, the configuration of the accelerator operation mechanism 20 that adjusts the rotation speed of the engine 3 according to the depression operation of the accelerator pedal 30 will be described with reference to FIGS. 6 to 10. Note that, hereinafter, the configuration of the accelerator operating mechanism 20 will be described with reference to a state in which the accelerator pedal 30 is not depressed.

The accelerator operation mechanism 20 includes an accelerator pedal 30, a detection mechanism 60, and an adjustment mechanism 70.

The accelerator pedal 30 shown in FIGS. 6 and 7 is to be depressed by the driver when adjusting the rotation speed of the engine 3. The accelerator pedal 30 is arranged on the right part of the cabin 11 (rightward of the steering wheel 12 in a plan view), and is arranged such that the front part faces the left and right outer sides of the tractor 1 (see FIG. 3 ).

As described above, in the present embodiment, the accelerator pedal 30 is inclined (the front portion is directed to the left and right outer sides). Therefore, in the following, for convenience of description, the accelerator pedal 30 (the axis line of the rotation support portion 51 to be described later is described. The accelerator operation mechanism 20 will be described by defining the vertical direction, the front-back direction, and the left-right direction based on the (direction). Specifically, the directions indicated by arrow U, arrow D, arrow F, arrow B, arrow L, and arrow R shown in FIGS. 6 to 13 are respectively upward, downward, forward, backward, leftward. And to the right. In addition, the arrow L and the arrow R are the axial direction of the rotation support part 51, and the arrow F and the arrow B are the directions orthogonal to the said arrow L and the arrow R in planar view.

As shown in FIGS. 9 and 10, the accelerator pedal 30 includes an operation portion 40, a rotation support portion 51, and a contact portion 52.

The operation unit 40 is a substantially plate-shaped portion on which the driver steps. The operation unit 40 is formed to extend upward and frontward in a side view. The operation unit 40 is arranged with its plate surface facing upward and rearward (downward and forward). The shape of the operation unit 40 will be described in detail later.

The rotation support portion 51 is a portion that rotatably supports the operation portion 40. The rotation support portion 51 is formed in a substantially tubular shape with the axial direction directed in the left-right direction. The rotation support portion 51 is formed so as to come into contact with the rear lower end portion of the lower surface of the operation portion 40. The upper end of the rotation support portion 51 is located slightly above the surface (upper surface) of the step 14 (see FIG. 7). As shown in FIGS. 6 and 7, a pin 51 a is inserted into the rotation support portion 51. The rotation support portion 51 is rotatably supported by the vehicle body via the pin 51a. Further, the pin 51a according to the present embodiment is arranged at a position lower (lower) than the step 14.

The contact portion 52 shown in FIGS. 9 and 10 is a portion that protrudes substantially downward (downward in the front direction) from the lower surface of the operation portion 40. The abutting portion 52 is formed in a substantially L-shape such that the end portion protruding downward extends leftward (inside the left and right of the tractor 1).

The detection mechanism 60 shown in FIGS. 6 and 7 is for detecting the depression of the accelerator pedal 30. The detection mechanism 60 is arranged in front of the rotation support portion 51. Further, the detection mechanism 60 is arranged at a position lower than that in step 14 except for a part of the member (first connecting shaft 64 described later). The detection mechanism 60 includes a fixed member 61, a shaft 62, a first rotating member 63, a first connecting shaft 64, a second rotating member 65, a second connecting shaft 66, a return spring 67, and a potentiometer 68.

The fixing member 61 is a member that is fixed to the step 14 from below and has a substantially inverted U-shape in rear view. The fixing member 61 is fixed to the step 14 by fastening a bolt from above with the upper surface in contact with the back surface of the step 14 (the lower surface of the floor plate forming the step 14). In this way, the fixing member 61 according to the present embodiment is provided so as to be hung on the step 14 (floor plate). The fixing member 61 includes a shaft portion 61a.

The shaft portion 61a shown in FIG. 7 and FIG. 8 is arranged with its axial direction oriented in the left-right direction. The shaft portion 61a is formed so as to project rightward from the right portion of the fixing member 61.

The shaft 62 is a member that rotatably supports a later-described first rotating member 63 and the like. The shaft 62 is arranged with its axial direction oriented in the left-right direction (the same direction as the axial direction of the rotation support portion 51). The shaft 62 is inserted into the right portion of the fixed member 61 and fixed to the fixed member 61.

The first rotating member 63 shown in FIGS. 6 to 8 is a member that rotates as the accelerator pedal 30 is depressed. The first rotation member 63 is arranged to the right of the fixed member 61. The first rotating member 63 includes a tubular portion 63a and a protruding portion 63b.

The tubular portion 63a is arranged with its axial direction directed in the left-right direction. The tubular portion 63 a is inserted into the shaft 62 and is rotatably supported by the shaft 62.

The protruding portion 63b is a portion protruding rearward and upward from the outer peripheral surface of the cylindrical portion 63a. The protruding portion 63b is formed in a substantially plate shape with the plate surface facing the left-right direction.

The first connecting shaft 64 shown in FIGS. 6 and 7 is a member for rotating the first rotating member 63 when the accelerator pedal 30 is depressed. The first connecting shaft 64 is arranged with its axial direction directed forward and downward (rear and upward). The upper end portion of the first connecting shaft 64 is then swingably connected to the contact portion 52 of the accelerator pedal 30. A front lower end portion of the first connecting shaft 64 is swingably connected to a rear upper portion of the protruding portion 63b of the first rotating member 63.

The second rotation member 65 is a member that rotates with the rotation of the first rotation member 63. The second rotating member 65 is arranged to the left of the first rotating member 63. The second rotating member 65 includes a tubular portion 65a and a protruding portion 65b.

The tubular portion 65a shown in FIGS. 6 and 8 is arranged with its axial direction oriented in the left-right direction. The left end of the shaft 62 is inserted into the right portion of the tubular portion 65a, and the tubular portion 65a is rotatably supported by the shaft 62.

The protruding portion 65b is a portion protruding rearward and upward from the outer peripheral surface of the tubular portion 65a. The protruding portion 65b is formed in a substantially plate shape with the plate surface thereof facing in the left-right direction, and faces the protruding portion 63b of the first rotating member 63.

The second connecting shaft 66 is a member that connects the first rotating member 63 and the second rotating member 65. The second connecting shaft 66 is arranged with its axial direction oriented in the left-right direction. The second end of the second connecting shaft 66 is connected to the protrusion 65b of the second rotating member 65, and the right end thereof is connected to the protrusion 63b of the first rotating member 63.

The return spring 67 is for returning the accelerator pedal 30 to the position before it is depressed. The return spring 67 is fitted onto the shaft 62 and the tubular portion 65 a of the second rotating member 65. The return spring 67 has its left end portion hooked on the second connecting shaft 66. The right end portion of the return spring 67 is appropriately attached to the fixing member 61. The return spring 67 urges the second connecting shaft 66 in the clockwise direction in FIG. 7.

The potentiometer 68 is for detecting the amount of rotation of the first rotating member 63. The potentiometer 68 is fixed to the left part of the fixing member 61 and is arranged to the left of the second rotating member 65. The potentiometer 68 includes a shaft portion 68a.

The shaft portion 68a is a portion where the rotation angle is detected in the potentiometer 68. The shaft portion 68a is arranged with its axial direction oriented in the left-right direction, and is fixed to the tubular portion 65a (left portion) of the second rotating member 65.

The detection mechanism 60 thus configured detects the depression of the accelerator pedal 30 by detecting the amount of rotation of the first rotation member 63 by the potentiometer 68. The tractor 1 is configured to be able to control the rotation speed of the engine 3 based on the detection result of the potentiometer 68.

The adjustment mechanism 70 is for adjusting the operating force required to depress the accelerator pedal 30. The adjusting mechanism 70 is arranged to the right of the fixing member 61. The adjusting mechanism 70 includes a friction plate 71, a spring receiving member 72, an adjusting spring 73, a cap 74, a plate 75, and a nut 76.

The friction plate 71 is a substantially plate-shaped member for generating a frictional force with the first rotating member 63. The friction plate 71 is formed in a substantially annular shape and is inserted into the shaft 62. A pair of left and right friction plates 71 are provided so as to sandwich the first rotating member 63 (cylindrical portion 63a).

The spring receiving member 72 shown in FIGS. 6 to 8 is a substantially plate-shaped member for receiving an adjusting spring 73 described later. The spring receiving member 72 is inserted into the shaft 62 and arranged on the right side of the right friction plate 71. The spring receiving member 72 is configured to be slidable in the left-right direction with respect to the shaft 62. In addition, the spring receiving member 72 is formed in a concave shape with its upper end portion and lower end portion recessed, and the shaft portion 61 a of the fixing member 61 is inserted into the concave portion (upper end portion), so that the shaft 62 is supported. It is configured so that it cannot rotate.

The adjusting spring 73 shown in FIGS. 6 and 8 is for urging the friction plate 71 to the left. The adjustment spring 73 is externally fitted to the shaft 62 and is arranged between the spring receiving member 72 and a cap 74 described later.

The cap 74 is a substantially cup-shaped member for receiving the adjustment spring 73. The cap 74 is inserted into the shaft 62 and contacts the adjustment spring 73. The cap 74 is configured to be slidable in the left-right direction with respect to the shaft 62.

The plate 75 is a substantially plate-shaped member arranged to the right of the cap 74. The plate 75 is inserted into the shaft 62 and contacts the right surface of the cap 74. The plate 75 is configured to be slidable in the left-right direction with respect to the shaft 62.

The nut 76 is screwed onto the right end of the shaft 62. The nut 76 is arranged on the right side of the plate 75, and the left end portion of the nut 76 contacts the plate 75. The nut 76 is arranged on the outermost left and right sides of the tractor 1 among the respective members (the friction plate 71 and the like) forming the adjusting mechanism 70.

As described above, the respective members of the adjusting mechanism 70 are arranged side by side in the axial direction of the shaft 62. Further, the respective members constituting the detection mechanism 60 are arranged side by side in the axial direction of the shaft 62, except for some members (the first connecting shaft 64 and the second connecting shaft 66). As a result, the accelerator operating mechanism 20 can arrange the respective members of the adjusting mechanism 70 and the detecting mechanism 60 side by side as much as possible and collect them in the axial direction of the shaft 62. This makes it easy to assemble and maintain the adjustment mechanism 70 and the detection mechanism 60.

Further, each member of the adjustment mechanism 70, the first rotation member 63, the second rotation member 65, and the return spring 67 of the detection mechanism 60 are attached to the fixed member 61 via the shaft 62. The potentiometer 68 is directly attached to the fixed member 61 (without the shaft 62). As described above, in the present embodiment, the members (the first rotating member 63 and the like) arranged side by side in the axial direction of the shaft 62 are provided so as to be collectively hung in the step 14 via the fixing member 61. Has been. With such a configuration, the first rotating member 63 and the like can be collectively attached to the step 14 via the fixing member 61. This makes it easier to assemble the adjusting mechanism 70 and the detection mechanism 60. Further, by removing the fixing member 61 from step 14, the first rotating member 63 and the like can be collectively removed from step 14. This makes it easier to perform maintenance on the adjustment mechanism 70 and the detection mechanism 60.

Hereinafter, the shape of the operation portion 40 of the accelerator pedal 30 will be described in detail with reference to FIGS. 9 to 11.

As described above, the operation unit 40 is a substantially plate-shaped portion for the driver to step on, and is arranged with the plate surface facing upward and rearward (downward and forward). The operation unit 40 is provided such that the lower end thereof is arranged below the step 14 and projects forward and upward from the step 14 (see FIG. 7 ). The operation unit 40 includes an operation surface 41 and a hole 44.

The operation surface 41 is a rear upper surface of the operation unit 40. The operation surface 41 is formed in a substantially rectangular shape with the lateral direction being the lateral direction and the front upper direction (rear lower direction) being the longitudinal direction. The operation surface 41 includes a flat portion 42 and a convex portion 43.

The flat portion 42 is a portion formed in a flat plane shape. The flat portion 42 is formed on the lower rear portion of the operation surface 41. More specifically, the flat portion 42 is formed over the entire range from the rear lower end of the operation surface 41 to a midway portion (rearward from the central portion in the longitudinal direction). The flat portion 42 has its front upper portion located at a position higher (upper) than the step 14, and its front upper end located at substantially the same height as the lower end of the opening 16a of the side console 16 (see FIG. 5). ). Further, the flat portion 42 is located at a position (lower side) whose lower end is lower than that of the step 14 (see FIG. 7).

As shown in FIG. 11, the convex portion 43 is a portion formed in an upwardly convex R shape (curved surface shape). Here, the point P1 shown in FIG. 11 indicates the front upper end of the flat portion 42. The straight line L11 shown in FIG. 11 is a straight line along the flat portion 42 in a side view. Further, FIG. 11 shows the circumference C that is in contact with the straight line L11 at the point P1. The convex portion 43 is formed in an R shape along the circumference C in a side view.

Such a convex portion 43 is formed so as to be continuous with the front upper end of the flat portion 42, and is formed so that the boundary with the flat portion 42 is as smooth as possible. Further, the convex portion 43 is formed so as to be separated from the straight line L11 toward the front upper end portion. The convex portion 43 is formed over the entire range from the front upper end of the operation surface 41 to the middle portion (rearward of the central portion in the longitudinal direction). In this way, on the operation surface 41, the convex portion 43 is formed over a wide range of half or more in the longitudinal direction, and the flat portion 42 is formed on the remaining portion.

As shown in FIGS. 9 and 10, a left protrusion 43a and a right protrusion 43b are formed on the convex portion 43 of the operation surface 41 thus formed.

Here, in describing the left side protrusion 43a and the right side protrusion 43b, the shape of the outer edge of the operation surface 41 (the shape in plan view) will be described. As shown in FIG. 10A, the outer edge of the operation surface 41 has a rear side B1, a front side F1, left sides L1 and L2, and right sides R1 and R2.

The rear side B1 is an edge portion on the rear side of the operation surface 41, and is formed so as to extend parallel to the left and right. The front side F1 is an edge portion on the front side of the operation surface 41, and is formed so as to extend substantially in the left-right direction (direction slightly inclined with respect to the left-right direction). The left edge of the front side F1 is formed to be located slightly left of the left edge of the rear side B1. Further, the right end of the front side F1 is formed so as to be located slightly to the left of the right end of the rear side B1.

The left sides L1 and L2 are edges on the left side of the operation surface 41, and connect the left end of the rear side B1 and the left end of the front side F1. The left side L1 is formed to extend from the left end of the rear side B1 to the front left. The left front end of the left side L1 is located at the front portion of the operation surface 41 (the portion where the convex portion 43 is formed). The left side L2 is formed to extend to the left rear from the left end of the front side F1. The left rear end of the left side L2 is connected to the left front end of the left side L1.

The right sides R1 and R2 are edges on the right side of the operation surface 41 and connect the right end of the rear side B1 and the right end of the front side F1. The right side R1 is formed so as to extend substantially forward from the right end of the rear side B1. The front end of the right side R1 is located at the front part of the operation surface 41, and is located in front of the front end of the left side L1 in the front-rear direction. The right side R2 is formed so as to extend from the right end of the front side F1 to the right rear. The right rear end of the right side R2 is connected to the front end of the right side R1.

The operation surface 41 configured in this manner is formed so as to gradually spread to the left from the front side F1 (left end) toward the connecting portion of the left sides L1 and L2. Further, the operation surface 41 is formed so as to gradually spread from the front side F1 (right end) toward the connecting portion of the right sides R1 and R2 to the right. The connecting portion of each side B1, F1, L1, L2, R1, R2 is formed in a shape with rounded corners (generally arcuate in plan view).

Next, the left side protrusion 43a and the right side protrusion 43b will be described.

The left side protruding portion 43a is a portion of the outer edge of the operation surface 41 that most protrudes (expands) to the left. Specifically, the left-side protruding portion 43a is a portion that most protrudes leftward with respect to the straight line L0 that connects the right rear end of the left side L1 and the right front end of the left side L2, that is, the connecting portion of the left sides L1 and L2. .. In the present embodiment, the left side protruding portion 43a is formed on the front portion of the operation surface 41 (the front and rear midway portion of the convex portion 43).

The right side protruding portion 43b is a portion of the outer edge of the operation surface 41 that most protrudes rightward. Specifically, the right side protruding portion 43b is a portion that most protrudes rightward with respect to the straight line R0 that connects the rear end of the right side R1 and the left front end of the right side R2, that is, the connecting portion of the right sides R1 and R2. In the present embodiment, the right side protruding portion 43b is formed on the front portion of the operation surface 41 (the front and rear halfway portion of the convex portion 43). Further, the right side protruding portion 43b is formed so as to be located in front of the left side protruding portion 43a.

In the present embodiment, the contact portion 52 is formed so as to be located between the left-side protruding portion 43a and the right-side protruding portion 43b that are thus offset in the front-rear direction. Specifically, the contact portion 52 is formed such that at least a part of the upper end (a portion connected to the lower surface of the operation portion 40) is located between the left side protruding portion 43a and the right side protruding portion 43b (FIG. 10(b)).

The hole 44 is a hole that penetrates the plate surface of the operation unit 40. A plurality of holes 44 are formed at appropriate intervals in the longitudinal direction and the lateral direction (horizontal direction) of the operation unit 40. Further, the hole portion 44 is formed so as to be displaced in the longitudinal direction with respect to the contact portion 52.

Next, the operation of the accelerator operating mechanism 20 configured as above will be described with reference to FIGS. 12 and 13.

When the operation surface 41 of the accelerator pedal 30 is depressed by the driver's foot A1 shown in FIG. 12, the operation section 40 swings downward around the rotation support section 51 (pin 51a). Along with this, the first connecting shaft 64 presses the protruding portion 63b of the first rotating member 63 downward. As a result, the protruding portion 63b of the first rotating member 63 swings downward around the shaft 62.

At this time, in the second rotating member 65 (see FIG. 6) connected to the first rotating member 63 via the second connecting shaft 66, the protruding portion 65b is integrated with the protruding portion 63b of the first rotating member 63. Swing downwards. As a result, the cylindrical portion 65a of the second rotating member 65 rotates, and the shaft portion 68a of the potentiometer 68 fixed to the cylindrical portion 65a also rotates (see FIG. 8).

The potentiometer 68 detects the rotation amount of the shaft portion 68a. The rotation speed of the engine 3 is appropriately controlled based on the detection result of the rotation amount. As a result, the accelerator operation mechanism 20 can adjust the rotation speed of the engine 3 according to the depression operation of the accelerator pedal 30. When the driver releases the foot A1 from the accelerator pedal 30 (operation surface 41), the urging force of the return spring 67 returns the accelerator pedal 30 to the position before depression (initial position).

Here, when the accelerator pedal 30 is depressed, the accelerator pedal 30 is strongly pushed in the vicinity of the base of the thumb of the foot A1 (right foot). Further, if the accelerator pedal 30 is further pushed on the toe side of the foot A1 in order to deepen the depression, the accelerator pedal 30 is strongly pushed even on the little finger side. As described above, when the accelerator pedal 30 is depressed, it is easy to apply a force to the accelerator pedal 30 from the vicinity of the base of the thumb (left front part) and the little finger side (right front part). As shown in FIG. 10, the operation unit 40 according to the present embodiment has the left side protrusion 43a and the right side protrusion 43b formed on the operation surface 41, so that the width in the left-right direction at the front portion of the operation surface 41 is reduced to the front end or the front end. It is configured to be wider than the width of the rear end in the left-right direction. With such a configuration, the left front portion and the right front portion (the portion where force is easily applied to the accelerator pedal 30) of the foot A1 are less likely to protrude from the operation surface 41. As a result, it is possible to easily apply a force from the foot A1 to the accelerator pedal 30, so that the operability of the operation unit 40 can be improved.

Further, as described above, when the accelerator pedal 30 is pushed on the toe side of the foot A1, the accelerator pedal 30 is strongly pushed even on the little finger side. If the accelerator pedal 30 is pushed further toward the toe side in order to deepen the depression from this state, the accelerator pedal 30 is pushed even near the tip of the little finger (the part in front of and behind the base of the thumb). In particular, when the accelerator pedal 30 is tilted (the front portion faces the left and right outer sides) as in the present embodiment, if the accelerator pedal 30 is pushed in on the toe side, the accelerator pedal 30 near the tip of the little finger of the foot A1. It becomes easier to push the pedal 30. The right side protrusion 43b according to the present embodiment is formed so as to be located in front of the left side protrusion 43a. With such a configuration, it is difficult for the vicinity of the tip of the little finger to protrude from the operation surface 41. As a result, when the accelerator pedal 30 is deeply depressed, it is possible to easily apply a force to the accelerator pedal 30 from the outside of the foot A1, so that the operability of the operation unit 40 can be improved.

Further, as shown in FIG. 12, the accelerator pedal 30 according to the present embodiment has a convex portion 43 formed on the operation surface 41. With such a configuration, when the driver depresses the accelerator pedal 30 (operation surface 41), the driver can push not the flat surface but the curved surface (the convex portion 43) forward and downward. As a result, the contact area between the driver's foot A1 and the operation surface 41 can be reduced, and the foot A1 can be made slippery with respect to the operation surface 41. Therefore, the accelerator pedal 30 (operation unit 40) can be smoothly operated.

Further, the accelerator pedal 30 gradually swings downward as the depression angle (the rotation angle of the operation unit 40) increases. As shown in FIG. 13, the accelerator pedal 30 restricts the rotation of the operation part 40 by the contact part 52 contacting the restricting member 14 a provided in the step 14. In this way, the accelerator pedal 30 is restricted from being depressed at a predetermined angle and is in the most depressed state.

Here, the point P2 shown in FIG. 13 indicates the front upper end of the operation surface 41. Further, the straight line L12 shown in FIG. 13 is a tangent line of the circumference C with the point P2 (the front upper end of the operation surface 41) as a contact in a side view. When the accelerator pedal 30 is fully depressed, the straight line L12 is a straight line (horizontal) along the front-rear direction in a side view.

As described above, in the present embodiment, the front upper end portion (a predetermined range including the front upper end (near the front upper end)) of the accelerator pedal 30 (operation surface 41) is substantially horizontal when the accelerator pedal 30 is most depressed. Is configured to be. That is, if a tangent line is drawn on the front upper end, the tangent line becomes substantially horizontal. In particular, in this state, the front end of the operation surface 41 (the tangent line L12 at the point P2) is horizontal.

With this configuration, when the accelerator pedal 30 is depressed most, the weight is applied to the operation surface 41 (the convex portion 43) from directly above, so that the operation surface 41 can be easily depressed.

Further, when the accelerator pedal 30 is depressed, the strongest force is likely to be applied to the accelerator pedal 30 from the vicinity of the base of the thumb of the foot A1 (left front part of the foot A1). Therefore, as shown in FIGS. 9 and 10, the accelerator pedal 30 according to the present embodiment has a contact portion 52 formed on the left front portion of the operation portion 40 (the back side of the left front portion of the operation surface 41). More specifically, the accelerator pedal 30 is located on the front upper side (between the left side protruding portion 43a and the right side protruding portion 43b in a plan view) of the operation portion 40 with respect to the central portion in the longitudinal direction, and from the left and right central portion. Also has a contact portion 52 on the left side. According to this, when the accelerator pedal 30 is fully depressed, the vicinity of the base of the thumb (the portion where the strongest force is likely to be applied) can be received by the contact portion 52, so that the operation portion 40 is not deformed or damaged. Can be suppressed.

Further, in the present embodiment, the hole portion 44 is formed by shifting the position in the longitudinal direction of the operation portion 40 with respect to the contact portion 52. With such a configuration, while the weight of the accelerator pedal 30 is reduced by the hole portion 44, the strength around the portion of the operation portion 40 where the contact portion 52 is formed is secured, and the operation portion 40 is deformed. And damage can be suppressed.

Further, as described above, when the accelerator pedal 30 is depressed, the first rotating member 63 swings. At this time, the first rotating member 63 (cylindrical portion 63a) slides on the friction plate 71 (see FIG. 8). With such a configuration, when the accelerator pedal 30 is depressed, a frictional force can be generated between the first rotating member 63 and the friction plate 71, and resistance can be generated when the accelerator pedal 30 is depressed. According to this, the operation force required to depress the accelerator pedal 30 can be increased, and the operation feeling of the accelerator pedal 30 can be improved.

Further, the frictional force generated between the friction plate 71 and the first rotating member 63 changes according to the compression amount of the adjustment spring 73. Therefore, in the present embodiment, the amount of compression of the adjusting spring 73 can be adjusted by the adjusting mechanism 70.

Specifically, the adjustment mechanism 70 can move the plate 75 leftward by tightening the nut 76 to reduce the interval (the interval in the left-right direction) between the spring receiving member 72 and the cap 74. As a result, the amount of compression of the adjustment spring 73 can be increased, and the frictional force generated between the friction plate 71 and the first rotating member 63 can be increased. As a result, the operating force required to depress the accelerator pedal 30 can be increased. Further, the adjustment mechanism 70 can move the plate 75 to the right by widening the nut 76 to widen the gap between the spring receiving member 72 and the cap 74. As a result, the amount of compression of the adjustment spring 73 can be reduced, and the frictional force generated between the friction plate 71 and the first rotating member 63 can be reduced. As a result, the operating force required to depress the accelerator pedal 30 can be reduced.

As described above, the adjusting mechanism 70 can easily adjust the frictional force generated between the friction plate 71 and the first rotating member 63 only by tightening or loosening the nut 76.

Further, members used for adjusting the adjustment spring 73, specifically, the cap 74, the plate 75, and the nut 76 are arranged on the left and right outer sides of the tractor 1 with respect to the detection mechanism 60 (the first rotating member 63, the potentiometer 68, and the like). Has been done. With such a configuration, it is possible to prevent the detection mechanism 60 from getting in the way when the frictional force is adjusted. In particular, the nut 76 according to the present embodiment is arranged on the outermost left and right side among the respective members of the adjusting mechanism 70, so that other members of the adjusting mechanism 70 are less likely to get in the way when the frictional force is adjusted. The frictional force can be adjusted more easily.

Further, as described above, when the operation surface 41 is stepped on, the operation section 40 and the first rotation member 63 swing with respect to the rotation support section 51. The first connecting shaft 64 has a lower front end as the operating section 40 and the first rotating member 63 swing during a predetermined period (in a range from the initial position to a certain angle) after the depression of the operating surface 41 is started. The part swings backward (see the arrow overlapping the first connecting shaft 64 shown in FIG. 12). With such a configuration, the amount of forward swing of the first connecting shaft 64 with respect to the accelerator pedal 30 when the operation surface 41 is depressed is reduced, and the first connecting shaft 64 comes into contact with other members. Can be suppressed.

Further, in the flat portion 42 according to the present embodiment, as shown in FIG. 5, the upper end (the portion indicated by the ridgeline) is substantially the same as the lower end of the opening 16a of the side console 16 before the accelerator pedal 30 is depressed. It is configured to be located at the height of. Further, the flat portion 42 is configured such that when the accelerator pedal 30 is depressed, the upper end is located at a position lower than the lower end of the side console 16. With such a configuration, when the relay box 16b and the fuse box 16c (electrical equipment) in the side console 16 are maintained, the accelerator pedal 30 can be pushed forward (stepped on) for maintenance. Can be prevented from getting in the way.

As described above, the accelerator operation mechanism 20 (operation mechanism) of the tractor 1 (work vehicle) according to the present embodiment includes the operation unit 40 having the operation surface 41 that is depressed by the driver's foot A1, and the operation unit 40. And a rotation support portion 51 for rotatably supporting an axis extending in the left-right direction. The operation surface 41 is formed on the left portion of the operation surface 41 and protrudes leftward. And a right side protrusion 43b formed on the right side of the operation surface 41 and protruding rightward.

With this configuration, the left front part and the right front part (portion where force is easily applied) of the foot A1 are less likely to protrude from the operation surface 41, so that the operability of the operation unit 40 can be improved.

The right side protruding portion 43b is located in front of the left side protruding portion 43a.

With this configuration, the vicinity of the tip of the little finger of the foot A1 (the portion where force is easily applied) does not easily stick out from the operation surface 41, so that the operability of the operation unit 40 can be effectively improved.

Further, it is located in a portion between the left side protruding portion 43a and the right side protruding portion 43b in the front-rear direction and extends downward from the operating portion 40, and is regulated when the operating surface 41 is stepped on by a predetermined angle. It further comprises an abutting portion 52 that abuts the member 14a (predetermined member).

With this configuration, the front-rear position of the contact portion 52 can be adjusted (approached) to the front-rear positions of the left front part and the right front part (portion where force is easily applied) of the foot A1. For this reason, when the operation surface 41 is stepped on by a predetermined angle, the left front portion and the right front portion of the foot A1 can be received by the contact portion 52, so that the deformation or damage of the operation portion 40 can be suppressed. it can.

The contact portion 52 is located on the left front portion of the operation portion 40.

With this configuration, when the operation surface 41 is stepped on by a predetermined angle, the vicinity of the base of the thumb can be received by the contact portion 52, so that the operation portion 40 is prevented from being deformed or damaged. You can

Further, the operation surface 41 is formed on at least the front upper end portion (front end portion) of the operation surface 41, and the convex portion 43 formed in an upwardly convex R shape and the convex portion 43 are excluded. And a flat portion 42 that is formed in a flat shape and that is formed in a portion, and the convex portion 43 is located at a front upper end (front end) of the flat portion 42 with respect to a straight line L11 along the flat portion 42. ), it is formed in an R shape along the circumference C which contacts.

With this configuration, as the driver steps on the operation surface 41, the driver's foot A1 can be made slippery with respect to the operation surface 41 (the convex portion 43). As a result, the operation unit 40 can be operated smoothly.
In addition, the shape of the operation surface 41 can be a simple shape including one flat surface (flat portion 42) and one curved surface (convex portion 43). Thereby, the shape of the operation surface 41 can be simplified.
Further, since the convex portion 43 is formed in the R shape along the circumference C, the boundary between the convex portion 43 and the flat portion 42 can be made smooth.

The left side protrusion 43a and the right side protrusion 43b are formed on the convex portion 43. In the present embodiment, “the left side protruding portion 43a and the right side protruding portion 43b are formed on the convex portion 43” means that the positions of the left side protruding portion 43a and the right side protruding portion 43b in the front-rear direction are convex. It means that it is formed so as to overlap with the position in the front-back direction of the shape portion 43.

With such a configuration, the left side protruding portion 43a and the right side protruding portion 43b can be formed in a curved shape, and the left front portion and the right front portion (portion where force is easily applied) of the foot A1 can be formed into the left side protruding portion 43a and the right side protruding portion. It can be made slippery with respect to the portion 43b. This allows the operation unit 40 to be operated more smoothly.

The convex portion 43 is formed from the front upper end portion (front end portion) to the rear lower portion (rear portion) of the operation surface 41.

With this configuration, the convex portion 43 can be formed in a range wider than the front half of the operation surface 41 (the forming range of the convex portion 43 can be widened). As a result, as the driver steps on the operation surface 41, the driver's foot A1 can be made more slippery with respect to the operation surface 41. This allows the operation unit 40 to be operated more smoothly.

Further, when the operation surface 41 is depressed by the predetermined angle, the convex portion 43 has a horizontal direction (front-back direction) in which a straight line L12 (tangent line) passing through the front upper end portion (front end portion) of the convex portion 43 is itself. Is almost the same as.

With this configuration, when the operation surface 41 is depressed by a predetermined angle, the weight can be applied from directly above the operation surface 41 to facilitate depression.

The front upper end (front end) of the flat portion 42 is located at a position higher than the step 14 at which the driver places the foot A1 and the rear lower end (rear end) is located at a position lower than the step 14. Is.

With this configuration, the flat portion 42 that is hard to slip on the foot A1 can be applied to the heel of the driver. This makes it easy to set the foot A1 on the accelerator pedal 30.

Further, when the first rotating member 63 (rotating member) that rotates as the operation surface 41 is stepped on and the first rotating member 63 try to rotate, the first rotating member 63 is rotated. And a friction plate 71 (friction member) that generates a frictional force between and.

With this configuration, the operation feeling of the operation unit 40 can be improved.

A pair of the friction plates 71 is provided so as to sandwich the first rotating member 63 in the left-right direction (the rotation axis of the first rotating member 63).

With this configuration, the pair of friction plates 71 can generate a frictional force on the left and right sides of the first rotating member 63, and effectively increase the resistance generated when the operation surface 41 is stepped on. You can

Further, the upper side (one side) is swingably connected to the operation portion 40, and the lower side (other side) is connected to the first rotating member 63, so that the operation surface 41 is depressed. Along with this, a first connecting shaft 64 (connecting member) for rotating the first rotating member 63 is further provided, and the first connecting shaft 64 has the rotating support portion 51 when the operation surface 41 is stepped on. It swings with respect to the operating portion 40 so as to approach the axis of the.
In the above configuration, in the range from the initial position to the most depressed state (the state where the contact portion 52 is in contact with the regulation member 14a), at least a part of the range is the first connecting shaft 64. It suffices to swing so as to approach the axis of the rotation support portion 51.

With this configuration, it is possible to prevent the first connecting shaft 64 from contacting surrounding members.

Further, an adjusting spring 73 (first urging member) that presses the friction plate 71 against the first rotating member 63, a cap 74 that adjusts the urging force of the adjusting spring 73, a plate 75, and a nut 76 (adjusting member). And are further provided.

With this configuration, it is possible to adjust the resistance generated when the operation surface 41 is depressed.

Further, a return spring 67 (second urging) for urging the first rotating member 63 in a direction opposite to the direction in which the first rotating member 63 rotates as the operation surface 41 is depressed. The first rotating member 63, the adjusting spring 73, and the return spring 67 are arranged in a predetermined direction (axial direction of the shaft 62).

With this configuration, the return spring 67 that exerts an urging force that returns to the position before the operation portion 40 is stepped on (initial position), the first rotation member 63, and the adjustment spring 73 are arranged in a line, This makes it easier to assemble and maintain the first rotating member 63 and the like. In addition, in the present embodiment, in addition to the return spring 67, the first rotating member 63, and the adjusting spring 73, the second rotating member 65, the potentiometer 68, the cap 74, the plate 75, and the nut 76 also move in a predetermined direction (shaft It is arranged so as to be lined up in the axial direction of 62). With such a configuration, it is possible to increase the number of members arranged in a line, and to more easily perform the assembly and maintenance of the first rotating member 63 and the like.

Further, a potentiometer 68 (detection member) that is arranged on the left and right inside of the tractor 1 with respect to the cap 74, the plate 75, and the nut 76 and that detects the rotation amount of the first rotation member 63 is further provided. is there.

With this configuration, it is possible to prevent the potentiometer 68 from interfering with the adjustment of the biasing force of the adjustment spring 73 by the cap 74, the plate 75, and the nut 76.

Further, the first rotating member 63, the adjusting spring 73, and the return spring 67 are attached, and further, a fixing member 61 fixed to the step 14 where the driver puts his/her foot is further provided.

With this configuration, the first rotation member 63, the adjustment spring 73, and the return spring 67 can be attached to the step 14 or removed from the step 14. This makes it easier to assemble and maintain the first rotating member 63 and the like. In addition, in the present embodiment, in addition to the first rotation member 63, the adjustment spring 73 and the return spring 67, the second rotation member 65, the potentiometer 68, the friction plate 71, the spring receiving member 72, the cap 74, the plate 75. The nut 76 is also attached to the fixing member 61. With such a configuration, it is possible to increase the number of members that are collectively attached to or removed from step 14 and that are easier to assemble and maintain the first rotating member 63 and the like.

The tractor 1 according to the present embodiment is an embodiment of the work vehicle according to the present invention.
Further, the accelerator operation mechanism 20 according to the present embodiment is an embodiment of the operation mechanism according to the present invention.
The first rotating member 63 according to the present embodiment is an embodiment of the rotating member according to the present invention.
The friction plate 71 according to the present embodiment is an embodiment of the friction member according to the present invention.
The first connecting shaft 64 according to the present embodiment is an embodiment of the connecting member according to the present invention.
The adjustment spring 73 according to the present embodiment is an embodiment of the first biasing member according to the present invention.
Further, the cap 74, the plate 75, and the nut 76 according to the present embodiment are an embodiment of the adjusting member according to the present invention.
The return spring 67 according to the present embodiment is an embodiment of the second biasing member according to the present invention.
The potentiometer 68 according to the present embodiment is an embodiment of the detection member according to the present invention.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described configuration, and various modifications can be made within the scope of the invention described in the claims.

For example, although the work vehicle according to the present embodiment is the tractor 1, the type of work vehicle according to the present invention is not limited to this. The work vehicle according to the present invention may be other agricultural vehicles, construction vehicles, industrial vehicles, or the like.

Further, the right side protruding portion 43b is located in front of the left side protruding portion 43a, but the positional relationship between the left and right protruding portions 43a and 43b in the front and rear is not limited to this, and any positional relationship may be used. can do. For example, the right side protruding portion 43b may be formed so that the front and rear positions thereof coincide with the left side protruding portion 43a, or may be positioned rearward of the left side protruding portion 43a.

In addition, the left and right protrusions 43a and 43b (the connecting portion of the left side L1 and L2 and the connecting portion of the right side R1 and R1) are formed to have rounded corners (generally arcuate in plan view). The shape of the protruding portions 43a and 43b is not limited to this, and may be, for example, a pointed shape.

Further, the convex portion 43 is formed from the front upper end to the rear lower portion, but the formed range is not limited as long as it is formed at least on the front upper end portion of the operation surface 41.

Further, the flat portion 42 is formed such that the front upper end is higher than the step 14, but the positional relationship between the front upper end and the step 14 can be set arbitrarily. The flat portion 42 may be located, for example, at a position where the front upper end is lower than the step 14.

Further, although the pin 51a according to the present embodiment is arranged below the step 14, the positional relationship between the pin 51a and the step 14 can be set arbitrarily. For example, the pin 51a can be arranged at the same height position as that of the step 14 or above the step 14. However, it is desirable that the pin 51a be arranged below the step 14. This makes it possible to hide the pin 51a (make it difficult to see). Further, it is desirable that the upper end portion of the pin 51a is arranged 10 to 40 mm below the step 14. With this configuration, the pin 51a can be easily attached and detached while hiding the pin 51a.

Further, although the contact portion 52 is formed on the left front portion of the operation portion 40, the location where the contact portion 52 is formed is not limited to this, and is, for example, the right front portion. May be. Further, although the contact portion 52 is positioned between the left and right protruding portions 43a and 43b, the front-rear positional relationship with respect to the left and right protruding portions 43a and 43b is not limited to this, and any position can be used. Can be a relationship. For example, the contact portion 52 may be located in front of or behind the left and right protrusions 43a and 43b.

Further, the convex portion 43 has a front upper end that is horizontal (the straight line L12 coincides with the front-rear direction) when the accelerator pedal 30 is fully depressed, but the present invention is not limited to this. In the convex portion 43, for example, a straight line L12 (tangent line) passing through the front upper end may be slightly inclined vertically with respect to the horizontal direction. That is, in the convex portion 43, the direction of the straight line L12 may substantially match the horizontal direction.

Further, the accelerator pedal 30 does not necessarily have to include the convex portion 43, and may be formed in a flat plate shape, for example.

Further, the position of the potentiometer 68 is not limited to the present embodiment as long as it can detect the amount of rotation of the first rotating member 63.

Further, the return spring 67, the first rotating member 63, and the adjusting spring 73 are arranged side by side in the left-right direction (the axial direction of the shaft 62). The direction in which the springs 73 are arranged is not limited to the left-right direction, and may be another direction. Further, the return spring 67, the first rotating member 63, and the adjusting spring 73 do not necessarily have to be arranged in the predetermined direction. Further, the return spring 67, the first rotation member 63, and the adjustment spring 73 do not necessarily have to be attached to the fixed member 61.

The shape of the friction plate 71 is not limited to the annular shape as in the present embodiment as long as it can generate a frictional force between the friction plate 71 and the first rotating member 63. And so on. The pair of friction plates 71 does not necessarily have to be provided on the left and right, and may be provided, for example, only on the left side of the first rotating member 63.

Further, the accelerator operating mechanism 20 does not necessarily have to include the adjusting mechanism 70.

The height position of the regulating member 14a that abuts on the abutting portion 52 of the accelerator pedal 30 may be adjustable. With such a configuration, the contact position between the contact portion 52 and the restriction member 14a (the swing range of the operation portion 40) can be easily adjusted.

1 tractor (work vehicle)
20 Accelerator operation mechanism (operation mechanism)
40 Operation part 41 Operation surface 43a Left side protrusion 43b Right side protrusion 51 Rotation support part

Claims (16)

An operation unit having an operation surface that is operated by the driver's foot,
A rotation support portion that supports the operation portion so as to be rotatable around an axis extending in the left and right,
Equipped with,
The operation surface is
A left-side protruding portion formed so as to protrude leftward while being formed on the left portion of the operation surface,
A right side protruding portion formed so as to protrude rightward while being formed on the right portion of the operation surface,
Equipped with,
Work vehicle operating mechanism. The right side protrusion is
Located in front of the left protrusion,
The operation mechanism of the work vehicle according to claim 1. It is located in a portion between the left side protruding portion and the right side protruding portion in the front-rear direction, extends downward from the operating portion, and comes into contact with a predetermined member when the operating surface is depressed by a predetermined angle. Further comprising a contact portion,
The operation mechanism for a work vehicle according to claim 1 or 2. The contact portion is
Located on the left front part of the operation part,
The operation mechanism of the work vehicle according to claim 3. The operation surface is
A convex portion formed on at least a front end portion of the operation surface and having an upwardly convex R shape;
A flat portion formed in a portion excluding the convex portion and having a flat shape,
Further comprising,
The convex portion is
Formed in an R shape along a circumference that is in contact with a straight line along the flat portion at the front end of the flat portion,
The operation mechanism for a work vehicle according to any one of claims 1 to 4. The left side protrusion and the right side protrusion are
Formed on the convex portion,
The operation mechanism of the work vehicle according to claim 5. The convex portion is
Formed from the front end to the rear of the operation surface,
An operating mechanism for a work vehicle according to claim 5 or 6. The convex portion is
When the operation surface is stepped on by the predetermined angle, the direction of the tangent line passing through the front end portion of the operation surface substantially coincides with the horizontal direction,
The operating mechanism for a work vehicle according to claim 5. The flat portion is
The front end is located higher than the step where the driver puts his foot, and the rear end is located lower than the step.
The operation mechanism for a work vehicle according to any one of claims 5 to 8. A rotation member that rotates as the operation surface is depressed,
A friction member that generates a frictional force with the rotating member when the rotating member tries to rotate;
Further comprising,
The operation mechanism for a work vehicle according to any one of claims 1 to 9. The friction member is
A pair is provided on the rotation axis of the rotation member so as to sandwich the rotation member.
An operating mechanism for a work vehicle according to claim 10. One side is swingably connected to the operating portion, the other side is connected to the rotating member, and further includes a connecting member that rotates the rotating member as the operation surface is stepped on. Then
The connecting member is
When the operation surface is stepped on, the operation surface is swung with respect to the operation portion so as to approach the axis of the rotation support portion.
An operating mechanism for a work vehicle according to claim 10 or 11. A first biasing member for pressing the friction member against the rotating member,
An adjusting member for adjusting the urging force of the first urging member,
Further comprising,
The operation mechanism for a work vehicle according to any one of claims 10 to 12. Further comprising a second urging member for urging the rotating member in a direction opposite to a direction in which the rotating member rotates as the operation surface is stepped on,
The rotating member, the first biasing member and the second biasing member,
Arranged to line up in a predetermined direction,
The operation mechanism of the work vehicle according to claim 13. A detection member that is disposed on the left and right inside of the work vehicle with respect to the adjustment member, and that detects a rotation amount of the rotation member;
The operation mechanism for a work vehicle according to claim 13 or 14. The rotating member, the first urging member, and the second urging member are attached, and further comprising a fixing member fixed to a step in which a driver places his/her foot.
An operating mechanism for a work vehicle according to claim 14 or 15.

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