JPH11312023A - Operating lever device for tractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the feeling of operating by reducing vibrations at the top end of a lever body by providing a weight at a clip. SOLUTION: A lever body 14 is composed of a stick-shaped member and a weight 15 composed of a pipe-shaped member is attached to the top end of its bent part. The weight 15 is covered with a synthetic resin and a grip 16 is formed. Therefore, the weight of the top end is increased and even when the middle part of the stick-shaped member is vibrated, the amplitude of the top end having the weight 15 is reduced. An arm 18 is fixed to a bush 17 so as to be extended downward. First and second rods 19 and 20 are engaged to the arm 18, the first rod 19 is connected to an accel pedal and the second rod 20 is connected to an engine throttle device. By stepping the accel pedal, the arm 18 is turned through the first rod 19 and the second rod 20 operates the throttle device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating lever device such as a hand accelerator lever for a tractor.

[0002]

2. Description of the Related Art FIGS. 6 and 7 show a hand accelerator lever device in a tractor. This lever device has a bracket 30 provided on one side in the left-right direction of the tractor body. A pair of upper and lower parallel first and second support shafts 31 and 32 project from the bracket 30 in the left-right direction. Further, a stopper pin 33 protrudes from an intermediate position between the two support shafts 31 and 32. A boss 35 fixed to the lower end of the rod-shaped member 34 is pivotally supported on the upper first support shaft 31 so as to be rotatable. A grip portion 36 is formed on an upper portion of the rod-shaped member 34. An interlocking rod 37 extending downward is fixed to the boss 35. A bush 38 is rotatably fitted on the second support shaft 32, and a first arm 39 extending forward and a second arm 40 extending upward are fixed to the bush 38. This first arm 3
The lower end of the interlocking rod 37 is in contact with the upper surface of the upper part 9 from above so as to be detachable. A first rod 41 connected to an accelerator pedal is engaged with the first arm 39. Further, a second rod 42 connected to a throttle of the engine is engaged with the second arm 40.

[0003] The grip portion 36 is located on the side of the steering handle in front of the driver's seat. Since the boss 35 is provided with rotation resistance by the spring washer 43, the position of the grip portion 36 can be arbitrarily fixed. The engagement of the interlocking rod 37 and the stopper pin 33 restricts the forward rotation of the grip portion 36, and this engagement position is the position of the maximum speed.

According to the hand accelerator lever device having the above structure, the operation of the accelerator pedal is transmitted to the second rod 42 via the first rod 41 to operate the engine throttle. Separately, by gripping the grip portion 36 of the hand accelerator lever and moving it forward (in the direction of arrow a in FIG. 7), the interlocking rod 37 pushes the first arm 39,
The engine throttle is operated.

[0005]

In the lever device having the above-described structure, the rod-shaped member is thin and long, so that the rod-shaped member vibrates, and the vibration of the grip portion at the tip thereof becomes extremely large.
There was a problem that the operation feeling was bad. Also,
Since the grip portion was deviated outward from the center of the vehicle body (driver seat) in the left-right direction, there was a problem that it was difficult to operate the grip portion in the front-rear direction.

[0006]

The present invention takes the following measures in order to solve the above-mentioned problems. That is, in an operation lever device of a tractor in which one end of a lever body is rotatably supported and the other end is a grip, a weight is provided on the grip. Thus, by providing the weight, the vibration of the distal end portion of the lever main body is reduced, and the operation feeling is improved.

Preferably, the weight is covered with a synthetic resin material to constitute the grip portion. Also, in a tractor operation lever device in which one end of a lever body is rotatably supported on one lateral side of a tractor vehicle body having a driver seat and the other end is a grip portion, the grip portion is The lever body is bent and formed so as to approach the driver's seat.

As described above, the operability is improved by bringing the grip portion closer to the driver's seat. Preferably, a weight is provided on the grip portion.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, the tractor supports a vehicle body with a front wheel 1 and a rear wheel 2, and an engine or the like is mounted on a front portion of the vehicle body. An operation panel 4 is disposed at a rear portion of the hood 3, and a control handle 5 is provided on the operation panel 4. A driver's seat 6 is arranged behind the steering handle 5. An accelerator pedal 7 is provided on the floor in front of the driver's seat 6 so as to be freely depressed.

On one side surface of the operation panel 4 in the left-right direction, a hand accelerator lever device 8 shown as an example of an operation lever device is provided. As shown in FIGS. 3 to 5, the hand accelerator lever device 8 has a bracket 9 fixed to a side surface of the operation panel 4, and the bracket 9
0 protrudes outward in the left-right direction. A boss 11 is rotatably fitted on the support shaft 10. The outer shape of the boss 11 has a stepped shape having a large diameter portion 12 and a small diameter portion 13. The large diameter portion 12 is located on the bracket 9 side, and the lower end of the lever body 14 is fixed to the upper surface side of the large diameter portion 12. The lever main body 14 is made of a metal solid round bar or pipe material, strip steel, or the like, and extends upward and slenderly, and its upper end is bent and formed so as to be directed toward the center of the vehicle body.

In this embodiment, the lever body 14 is
A weight 15 made of a pipe-shaped member is attached to the tip of the bent portion. The weight 15 is covered with a synthetic resin and
Are formed. A bush 17 is rotatably fitted on the small diameter portion 13 of the boss 11. The arm 18 is fixed to the bush 17 so as to extend downward. The first rod 19 and the second rod 20 are engaged with the arm 18. The first rod 19 is connected to the accelerator pedal 7. The second rod 20 is connected to a throttle device of the engine.

At the end of the support shaft 10, a thrust washer 2
The thrust washer 21 is in contact with the end surface of the small diameter portion 13 of the boss 11 and the end surface of the bush 17. A spring 22 for pressing the thrust washer 21 in the axial direction is fitted over the end of the support shaft 10, and the strength of the spring 22 can be adjusted by a nut 23. The rotation of the boss 11 and the bush 17 is restricted by the thrust washer 21.

A U-shaped regulating plate 24 is fixed to the lower surface side of the large diameter portion 12 of the boss 11, and an interlocking pin 25 projects from the outer surface of the regulating plate 24. The interlocking pin 25 has a length that abuts on the front side surface of the arm 18 so as to be able to freely contact and separate. Then, the stopper pin 2 is attached to the bracket 9.
6 are protrudingly provided. The stopper pin 26 comes into contact with the U-shaped inner surface of the regulating plate 24 so as to be able to freely contact and separate.

According to the hand accelerator lever device 8 having the above-described structure, when the accelerator pedal 7 is depressed, the first
The arm 18 is rotated via the rod 19, and the second rod 20 operates the throttle device. At this time, the bush 17 rotates, but the boss 11 does not rotate due to the frictional force of the thrust washer 21. When the user grips the grip portion 16 of the hand accelerator lever and moves it forward (in the speed increasing direction), FIG.
The lever body 14 rotates in the direction of arrow a, and this rotation causes the regulating plate 24 to rotate via the boss 11. Then, the interlocking pin 25 of the regulating plate 24 comes into contact with the arm 18 and moves the arm 18 together, whereby the second rod 20 moves and the speed of the engine is increased.

The movement of the grip portion 16 of the hand accelerator lever in the front-rear direction can be performed within a range in which the U-shaped inner surface of the regulating plate 24 abuts the stopper pin 26. Can be fixed in position.
According to the above configuration, the weight 15 is attached to the tip of the rod-shaped member 14.
Is provided, the weight of the tip increases, and even if the middle part of the rod-shaped member 14 vibrates, the amplitude of the tip having the weight 15 decreases. Since the weight 15 is a grip portion 16, the feeling of operation is improved.

Further, since the grip portion 16 is configured to approach the driver's seat, operability is improved as compared with a conventional remote portion. It should be noted that the present invention is not limited to the embodiment described above, but can be applied to a shuttle lever, a hydraulic control lever, and the like.

[0017]

According to the present invention, since the weight is provided at the tip of the lever body, the vibration of the operating lever is reduced,
The feeling of operation is improved, and the operability is improved because the grip portion is closer to the driver's seat.

[Brief description of the drawings]

FIG. 1 is a side view of a tractor.

FIG. 2 is a plan view of FIG. 1;

FIG. 3 is a front view of the operation lever device as viewed from a driver seat.

FIG. 4 is a sectional view of a main part of FIG. 3;

FIG. 5 is a side view of FIG. 3;

FIG. 6 is a front view as viewed from a conventional driver's seat.

FIG. 7 is a side view of FIG. 6;

[Explanation of symbols]

 14 Lever body 15 Weight 16 Grip

Claims (4)

[Claims] 1. A tractor operation lever device in which one end of a lever body is rotatably supported at one end and a grip portion is provided at the other end, wherein a weight is provided on the grip portion. 2. The tractor operating lever device according to claim 1, wherein said weight is covered with a synthetic resin material to constitute said grip portion. 3. An operation lever device for a tractor, wherein one end of a lever body is rotatably supported on one side in the left-right direction of a tractor body having a driver's seat, and the other end is a grip. An operation lever device for a tractor, wherein the lever main body is bent so that a grip portion approaches the driver seat. 4. The operating lever device for a tractor according to claim 3, wherein a weight is provided on the grip portion.