JPS60197411A - Wheel suspending method for farm working vehicle - Google Patents

Abstract

PURPOSE:To prevent a car body from tilting and overturning in time of driving on an uneven ground, by turning a front axle or a rear axle round in both directions by vertical movements in front wheels or rear wheels so as to become the opposite side to the car body with each other centering on each of lengthwise central parts. CONSTITUTION:In the case where a car body runs and either of front wheels 6 or rear wheels 7 fall in or run on an uneven part of the ground, a front axle 2 or a rear axle 3 turns round in both directions centering on each of front or rear turning support parts 4 and 5. Simultaneously with this turning, an interlocking arm 11 turns round centering on a fulcrum shaft 10 via a front link 8 and a rear link 9, rotating the front axle 2 or the rear axle 3 by the other side link 9 or 8. In consequence, to cope with height of a convex part or depth of a concave part whereby a wheel runs on or falls in, the car body 1 performs vertical movements being mutually contradictory to front and rear turning support parts 4 and 5 at a position of the fulcrum shaft 10 so that tilting motion in the car body 1 becomes reduced. Therefore, the car body 1 is preventable from overturning.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method for suspending wheels of an agricultural working vehicle, which reduces the inclination of the vehicle body when the ground contact wheels move up and down.

(0) Conventional technology A four-wheeled vehicle having a pair of left and right front wheels and a rear wheel (
If the ground contact wheels are tilted due to undulations or unevenness of the ground contact area, the vehicle body will also tilt, but in order to alleviate the tilt and vibration of the vehicle body, passenger cars use shock absorbers such as springs. The mechanism is set up in step 1) to absorb this.

However, it does not make much sense in fields where agricultural crops are grown, such as on undulating or sloping terrain, where driving conditions are poor (for agricultural vehicles that are mainly used, the shock absorbing mechanism, etc. is de-sensitized).
Prevents the vehicle body from tilting, preventing the center of gravity from shifting and falling over.''1
It is important to

In general agricultural tractors, etc., the front part of the vehicle body is pivoted (so-called pivot I) to the front part of the vehicle body so that the center part of the front shaft is rotatable from side to side. Therefore, the vertical motion exerted on the front wheels is reduced (halved). However, since the vehicle body A is supported by the rear wheels integrally with the rear axle, the left and right movement of the vehicle body is controlled by the rear axle (rear wheels). This means that when the height of the vehicle is large, such as in the case of a transport vehicle, the effects of side-to-side movement are significant, which can easily lead to the vehicle body tipping over on slopes, etc., as described above.

(lI) Problems to be Solved by the Invention In view of the above-mentioned circumstances, the present invention reduces vertical motion and inclination transmitted to the front wheels (front axle) and rear wheels (rear axle) relative to the vehicle body. The purpose of this invention is to provide a method for suspending skewers of agricultural work vehicles, which reduces the risk of tilting and overturning of the vehicle body.

In order to achieve this object, the present invention provides a front axle and a rear axle across the width of the vehicle body at the front and rear portions of the vehicle body. In an agricultural work vehicle with wheels that are pivotally supported, the longitudinal center portions of both axles are pivoted so that the wheels can move vertically with respect to the vehicle body. The front axle and the rear axle on the side are connected so that the front axle or the rear axle moves through the wheels as the car body runs [when the vehicle moves, the vertical power 1~ of the front axle and the rear axle is opposite to the phase H]. It is characterized by the fact that it is connected to U.

(7+0 Implementation example Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 indicates the body of an agricultural work vehicle, and at the front and rear portions of the vehicle body 1, longitudinal central portions of a front center shaft 2 and a rear skewer shaft 3 are provided in the front and rear portions of the vehicle, respectively, in the width direction of the vehicle. The front rotation support part 4 and the rear rotation support part 5, which are desensitized to the vehicle body 1, are supported so as to be rotatable left and right and are pivotally connected.At both ends of the front axle 2 and the rear axle 3, A front wheel 6 and a rear wheel 7 are respectively supported.

The front axle 2 and the rear width axis 3 are located at one side of the vehicle body 1,
Bend the lower end through the pivot parts 8a and 9a, and attach it to the rear skewer shafts 2 and 3.
The upper end is supported by the pivot support 8
A front link 8 and a rear link 9 are pivotally supported on both ends of an interlocking arm 11, which is rotatably pivoted back and forth on the vehicle body 1 via a pivot shaft 10, through b and 9b.
() are interlocked and connected.

b. In the above embodiment, similar interlocking and connecting devices such as the front and rear links 8 and 9, the pivot shaft 10, and the interlocking arm 11 may also be provided on the other side of the vehicle body 1. .

In this case, when the vehicle body 1 is traveling in the direction of the arrow, the front wheels 6, 6, the rear wheels 7, 7
If either of them rides on a convex part of the ground or falls into the four parts, the front axle 2 or the rear axle 3 will rotate around the front rotation support part 4 or the rear rotation support part 5. It rotates left and right, and at the same time, the interlocking arm 11 rotates about the pivot shaft 10 via the front link 8 and rear link 9.
The other link (9 or 8) rotates the front axle 2 or the rear axle 3, and as a result, the wheel rides over.
In response to the height of the convex part or the depth of the depressed part, the vehicle body 1 undergoes opposite downward movements at the front and rear rotation supports 4 and 5, and the pivot shaft 10, and the vehicle body Tilt is small (approximately 1/
'2), the center of gravity is less likely to shift, making it difficult to fall;
It is highly adaptable when used in fields such as sloping areas. The same thing can be said when there are small irregularities in a flat field, etc., and the rightward movement (rolling) of the vehicle body 1 is approximately 1. −
A stable running condition can be obtained by reducing the number to 2.

However, the device of the present invention does not have a very good effect on the 1-5 vertical movement (pitching) of the vehicle body 1.

In another embodiment of the present invention shown in FIG. The rear hydraulic cylinder 13 is pivoted to the front axle 2 and the rear axle 3 by a pivot pin 12.
b, pivotally supported via 13b, both hydraulic cylinders 12.
The tip of the piston 13 is pivoted to the pin 12a'.

The IC is also pivotally supported on the vehicle body 1 via 13a. Both cylinders 12.13 are connected by a hydraulic hose 14.14, and when one piston of both cylinders 12.13 expands or contracts, the other piston also expands or contracts in the opposite direction.
'IJ is becoming more popular. In this embodiment, the front wheels 6,
6. The rear wheels 7, 7 are almost horizontally on the ground, and the vehicle body 1 is at Gff.
In the horizontal case, the piston protrusion amounts of the hydraulic cylinders 12 and 13 are set to be approximately the same.

In this embodiment, as in the embodiment shown in FIG. 1, the vertical movement of the front wheels 6, 6 and the rear wheels 7,
The oil low cylinders 12 and 13 mutually expand and contract to reduce the inclination of the vehicle body 1 and prevent it from overturning.

(F) Effects of the Invention As explained above, according to the method of suspending heavy wheels during agricultural work according to the present invention, one front center axle or one rear center wheel can be manually adjusted to the front or rear wheels. The vehicle rotates left and right relative to the vehicle body around the central part in the length direction, and the front center axle and rear wheels are linked so that their movements are on opposite sides, so the wheels can ride on convex parts or fall into the four parts. In this case, the inclination of the vehicle body is approximately halved, the center of gravity of the vehicle body moves less, and it is difficult to overturn, making it suitable for agricultural work tli used on slopes, etc., for example.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, and FIG. 2 is a perspective view of another embodiment of the invention. 1...Vehicle body, 2...Front center axle, 3...Rear axle, 4...
... 11i 1 part rotation support part, 5... Rear rotation support part,
6...Front wheel, 7...Rear wheel, 8...Front link, 8
a, 9a, 8J 9b... Pivotal part, 9... Rear link, 10... Pivot shaft, 11... Interlocking arm, 1
2-...Front hydraulic cylinder, 12a, 12b,
13a. 13b... Pivot pin, 13... Rear hydraulic cylinder,
14...Oil [E small-su. Patent applicant: Agricultural Mechanization Research Institute agent, patent attorney: Satoru Kobashi, patent attorney: Susumu Murai

Claims (1)

[Claims] In an agricultural work vehicle in which a front axle and a rear axle are provided in the front and rear parts of the vehicle body across the width direction of the vehicle body, and wheels are pivotally supported at both ends of the two axles, the center portion of both axles in the length direction is provided. The wheels are pivoted so that they can rotate left and right with respect to the vehicle body and can move up and down, and the front axle and rear axle are the same on the left and right centering on these two-phase branches. A method for suspending wheels of an agricultural work vehicle, characterized in that when the rear axle moves up and down, the front axle and the rear axle are linked so that the vertical movement directions are opposite to each other.