JPH02109785A - Tractor - Google Patents

Abstract

PURPOSE:To easily adjust a distance between right and left front and rear wheels by crossing a frame, supporting the left side front wheel and the right side rear wheel, with a frame, supporting the right side front wheel and the left side rear wheel, further adjusting the frames to be turned each other in a horizontal direction. CONSTITUTION:A hydraulic cylinder 18 is controlled to an extension or contraction side, and a distance between right and left front wheels 1, 1 and between right and left rear wheels 2, 2 is adjusted to a spread or reducing side through rice field frames 3a, 3b and steering cases 16, 16, 17, 17. Here because the right and left front and rear wheels 1, 1, 2, 2 form a parallel link by interlocking rods 19, 19, 20, 20 and both the frames 3a, 3b, the wheels are maintained in a straight advancing attitude with no turning motion. While by controlling a steering arm 5 to be turned in one side or the other, the right and left front and rear wheels 1, 1, 2, 2 are simultaneously turned and steered to one side or the other through a steering interlocking mechanism 6. Accordingly, in case of adjusting the distance between the wheels, the necessity for adjusting a steering interlocking system is eliminated.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a tractor.

BACKGROUND ART AND PROBLEMS TO BE SOLVED BY THE INVENTION In a tractor having a configuration in which the distance between the left and right front wheels and the left and right rear wheels can be adjusted, the distance between the wheels is usually adjusted between the front wheels and the rear wheels. Since each has a separate adjustment mechanism, it is necessary to adjust each of them separately, which is time-consuming and troublesome.

In addition, in the case of a type in which the distance between each of the front wheels and the rear wheels can be adjusted in this way, and the left and right front wheels and rear wheels can be steered simultaneously, when adjusting the distance between one wheel, this adjustment In addition to this, it is also necessary to adjust the steering linkage system, such as adjusting the expansion and contraction of the front and rear wheel tie rods. Therefore, it would be complicated and not easy to perform these operations separately. .

(Invention of Claim 1) Means for Solving the Problem This invention provides a frame (3a) on one side that supports a left front wheel (1) and a right rear wheel (2), and a right front wheel (2).
1) and the frame (3b) on the other side that respectively supported the left rear wheel (2), these front and rear axles tl) (11+2)
(The two frames (3a) (3b
) A tractor is provided with an adjustment mechanism (4) between which the frames (3a) and (3b) can be rotated relative to each other.

When adjusting the distance between working wheels of the invention, when the adjustment mechanism (4) is operated to the side where the distance between the wheels increases or decreases, the one-car frame (
3a) by mutual rotation of (3b).

Left and right front wheels (1) (11 and left and right rear wheels +21 +21
The distance between the rings is .

At the same time, it is adjusted to the enlargement side or the reduction side.

Effects of the Invention Due to this action, the front wheel (1
) and the rear wheel +21 (2), it is not necessary to separately operate the distance between the axes, and only the adjustment mechanism (4) needs to be operated, so the operation is simple and easy.

(Invention of Claim 2) Means for Solving the Problem This invention provides a frame (3a) on one side that supports a left front wheel (1) and a right rear wheel (2), and a right front wheel (2).
1) and the frame (3b) on the other side that supported the left rear wheel (2) respectively, these front and rear wheels +11 (1) (1)
(2) The two frames (3a) (2) are arranged so as to intersect with each other at approximately the center thereof, and are mutually rotatable in the horizontal direction.
3+)) Between the two frames (3a) (3b)
An adjustment mechanism (4) capable of mutually adjusting the rotation is provided, and an adjustment mechanism (4) is provided between the rotation centers of the frames (3a) (3b) and the left and right front and rear axes +11 (1) (21+21). is a steering arm (5) that is rotated about the rotation center, and the front and rear wheels (1) (1) (2> +2) are linked to this steering arm (5). The tractor is provided with a steering interlocking mechanism (6) that can simultaneously steer the vehicle.

When adjusting the distance between working wheels of the invention, when the WIU joint mechanism (4) is operated to the side where the distance between the wheels increases or decreases, the mutual rotation of the one-car frame (3a) (3b) causes the left and right to move. The distance between the front wheels (1) (11) and the left and right rear wheels (2) (2) is.

At the same time, it is adjusted to the enlargement side or the reduction side.

Also, when the steering arm (5) is rotated to one side or the other,
The left and right front and rear axles (IHII
f2) +21 is simultaneously steered to one side or the other.

Effects of the Invention Due to this action, there is no need to separately adjust the center distance between the front wheels (1) and the rear wheels (2) as in the problem described above, and the adjustment mechanism (4) can be used alone. Because it's good,
Therefore, the operation is simple and easy.

Also, when adjusting the center axis, as mentioned above.

There is no need to adjust the steering interlock system, and no operation is required, so it is convenient and hassle-free.

Embodiment In addition, when rotating, a machine stand (9) on which the prime mover +81 is mounted is provided at the front end, and the prime mover (8) on this machine stand (9)
A transmission case (1) containing a transmission mechanism is provided on the rear side, and a steering handle (1) is installed at the rear end of this transmission case (1).
1υ is installed diagonally, and a cover (13) is installed on the rear end of the aircraft base (9), and a cover (13) is provided at the rear end of the aircraft base (9). 1 is provided with a lifting mechanism +141 for lifting and lowering a working machine.

A support shaft (19) is provided in the center of the machine base (9) in the front-rear direction, projecting downward, and the left front wheel (151) is attached to the support shaft (151).
) and a steering case (IEi) of the right rear axle (2), and a frame (3
a) is rotatably provided, and furthermore, the support shaft (19) rotatably supports the steering case (IS) of the right front wheel (1) and the steering case (m) of the left rear axle (2). A rotatable frame (3b) is provided between the two frames (3a) (3b) at the rear of the support shaft (I!i), and the two frames (3a) (3b) are rotatably provided A hydraulic cylinder (Ilm) of the adjustment mechanism (4) is provided which can be adjusted dynamically.

A steering arm (5) that is steered in conjunction with the steering handle (1υ) is rotatably provided at the lower end of one of the support shafts, and the left end of the steering arm (5) and the left front shaft ( 1)
These steering cases (IQ (17
The interlocking rods (1) of the steering interlocking mechanism (6) capable of rotating the steering arms (1) and (1) are respectively provided parallel to the frames (3a) and (3b), and the right side of the steering arm (5) is and the steering case (161) of the right front wheel (1).
and the steering case (lη) of the right rear axle (2), the interlocking rod (191 (21) of the steering interlocking mechanism (6) capable of rotating the steering case (old) Each of the frames (3a) and (3b) is provided parallel to the frame (3a) and (3b).

Next, the effect will be explained. When the hydraulic cylinder (Ill) is operated to the extension side or contraction side, both frames (3a) (
3b), each steering case 116) (I [9 (+ force) (through one the distance between the left and right front wheels (1) side or reduction side.At this time, the left and right front and rear wheels (1) (1) 12
+ (21 is each interlocking rod (19(11e[I (2
[) and both frames (3a) and (3b) form a parallel link, so the straight forward posture is maintained without rotation.

When the steering arm (5) is rotated leftward or rightward with the steering handle (10), the interlocking rod (1) (+1, steering case TIG) (front wheel (1) (1) via IQ),!:
, interlocking rod O! [) 12G, steering case (1η(1
The rear wheels (2) (2) via η are respectively steered to turn as much as possible to the left or to turn as much as possible to the right.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, with FIG. 1 being a plan view and FIG. 2 being a side view of the whole. In the figure, (1) is the front wheel, (2) is the rear wheel, (3a) (3
b) shows the frame, (4) the adjustment mechanism, (5) the steering arm, and (6) the steering interlocking mechanism.

Claims (1)

[Claims] 1. One side frame (3a) that supports the left front wheel (1) and the right rear wheel (2), and the right front wheel (1) and the left rear wheel (2), respectively. The supported frame on the other side (3b
) are arranged to intersect at approximately the center between these front and rear wheels (1) (1) (2) (2) and are mutually rotatable in the horizontal direction, and both frames (3a) (3b ) is provided with an adjusting mechanism (4) between which the frames (3a, 3b) can be rotated relative to each other. 2 One frame (3a) that supports the left front wheel (1) and the right rear wheel (2), and the other frame that supports the right front wheel (1) and the left rear wheel (2), respectively. (3b
) are arranged to intersect at approximately the center between these front and rear wheels (1) (1) (2) (2) and are mutually rotatable in the horizontal direction, and both frames (3a) (3b ) is provided with an adjustment mechanism (4) that can mutually adjust the rotation of the frames (3a) and (3b).
b) The center of rotation and the left and right front and rear wheels (1) (1
)(2)(2), there is a steering arm (5) that is rotated about the rotation center, and a steering arm (5) that is interlocked with the front and rear wheels ( 1)(1)(2)(
2) and a steering interlocking mechanism (6) capable of simultaneously steering the tractor.