JPS6123290Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a stabilizer for a three-point link type work implement mounting device among the work implement mounting devices for agricultural tractors.

The three-point link type work equipment mounting device consists of a work equipment coupling link consisting of one top link and two lower links, and a hydraulic lift arm for rotating upward while the work equipment is connected.

The stabilizer is a device that tightens the work equipment together using a turnbuckle device to prevent the work equipment from swinging from side to side. Without this, there would be no left and right margin when connecting the work equipment to the three-point link, and it would take time and effort to connect.

By tensioning and fixing the stabilizer after joining, labor and effort can be saved.

Generally, a fixed body made of a rod is sometimes used as a stabilizer, and there is also a check chain type stabilizer in which a chain is stretched from both sides to secure the working machine. Either way, the purpose is the same.

If a rotary tiller is used as a working machine, the claws and drive parts will be damaged if the rotary tiller is shaken from side to side, so it is completely fixed with a stabilizer, so there is little need for the present invention.

However, when towing a plow or the like as a working machine, the stabilizer must be loosened during operation so that the plow can follow the tractor. However, when the work equipment was raised for plowing in this condition, the raised plow would sway sideways and come into contact with the aircraft body.

The present invention was devised to solve this problem.

The configuration of the present invention will be explained based on the accompanying drawings.

Figure 1 is an overall side view of an agricultural tractor.

An engine 2 is disposed within a bonnet 1, and a clutch housing 3 is fixed to the rear surface of the engine 2. Further, a transmission case 4 is fixed to the rear surface of the clutch housing 3, and a rear axle case 17 is fixed to the rear surface. The PTO shaft 14 protrudes from the rear surface of the rear axle case, and the PTO shaft 14
is covered with a cover 19.

Front wheels 5, 5 and rear wheels 5, 6 support the lower part of the machine frame consisting of the engine 2, clutch housing 3, transmission case 4, and rear axle case 17.

Rear axle housings 18 are protruded from both sides of the rear axle case 17, supporting the rear wheels 6, 6, a hydraulic case 7 is placed on the upper surface of the rear axle case 17, and a seat 9 is placed on the upper surface of the hydraulic case 7. is provided. A lift arm 8 rotatably protrudes from the hydraulic case 7 and moves up and down a lower link 13 via a lift link 12. A top link 11 is pivotally supported by a top link support 10 provided on the rear surface of the hydraulic case 7.

A drawbar hitch 16 for towing a trailer or the like is provided on the upper surface of the rear axle case 17.

FIG. 2 is a side view of the working machine mounting device of the present invention. FIG. 3 is a plan view of the right half as viewed in the direction of travel. FIG. 4 is a plan view of the left half as viewed in the direction of travel.

Lower link 13 is rear axle housing 1
A pivot base 13a is provided in a part of the rear axle case 17, and a pivot base 13a is provided in a part of the rear axle case 17. In this embodiment, a pivot base 13a is disposed in the rear axle housing 18.

The check chain 20 as a conventionally provided stabilizer is disposed outside the lower link 13 in plan view, its rear end is pivotally connected to the middle part of the lower link 13, and its front end is close to the tip of the rear axle housing 18. The mounting body of the part is pivotally supported by the pivot portion 20a, and a turnbuckle is interposed in the middle to allow tension and relaxation to occur freely.

The turnbuckles are used to relax the check chain 20 during plowing and tension the check chain 20 during rotary tilling.

The auxiliary stabilizer 15 of the present invention is constituted by a chain, is arranged inside the lower link 13 in plan view, has its rear end pivoted near the pivot pin of the lift link 12 that moves the lower link 13 up and down, and has its front end attached to the mounting body. It is pivoted to the pivot point 15a.

The mounting body pivot portion 20a of the check chain 20 on the rear axle housing 18 side is arranged approximately on the same center as the pivot base 13a of the lower link 13 in a side view, and the lower link 13 can be rotated by rotating the lift arm 8. The structure is such that the lower link 13 will not be tensioned by the check chain 20 alone even if it rotates upward.

On the other hand, the mounting body pivot portion 15a of the auxiliary stabilizer 15 is connected to the pivot base 1 of the lower link 13.
3a is shifted in position. That is, since the mounting body pivot 15a is arranged behind the pivot base 13a and the centers of rotation of both are shifted, the chain of the auxiliary stabilizer 15 gradually becomes tense as the lower link 13 rotates upward. , the left and right swing of the lower link 13 disappears at a certain certain position.

Depending on the relationship between the length of the auxiliary stabilizer 15 and the position of the mounting body pivot 15a, the auxiliary stabilizer 15 may become tense before the lift arm 8 reaches the highest position, preventing the work machine from lifting any further. There is a risk of locking the movement.
It is desirable that the tension lock position of the auxiliary stabilizer 15 coincides with the highest position of the lift arm 8, or that there is some margin in the tension state at the highest position of the lift arm 8. Even if there is a margin in the tensioned state, by preventing the work equipment from shaking significantly, it is possible to sufficiently prevent the situation of contact between the work equipment and the tractor body.

In FIG. 4, reference numeral 13 is a drawing showing the left and right rotational posture of the lower link 13, and 16' is a drawing showing the left and right rotational posture of the drawbar hitch.

As described above, in the present invention, the rear end of the check chain 20 is pivotally connected to the outside in plan view across the lower link 13, and the rear end of the auxiliary stabilizer 15 consisting of a chain is pivotally connected to the inside. The mounting body pivot 20a at the front end of the auxiliary stabilizer 15 and the pivot base 13a of the lower link 13 are arranged on substantially the same center in a side view, and the mounting body pivot 15a at the front end of the auxiliary stabilizer 15 is located on the same center as the pivot base 13a of the lower link 13a.
Since the auxiliary stabilizer 15 is configured to be tensioned by the upward rotation of the lower link 13 at the rear position farther away from a in side view, the following effects are achieved.

When carrying out work with the rotary tilling device installed, the check chain 20 is always kept under tension to prevent sideways shaking, so the check chain 20 must be kept under tension when the rotary tilling device is in the raised position. However, when performing plowing work, the check chain 20 should be relaxed so that the plow can move freely from side to side. They are leading the way as much as possible.

In this state, when the plow is rotated to the raised position by the lift arm when going around the edge of the field, if only the conventional check chain 20 is used, the check chain 20 is relaxed, so the plow will not limp in the raised position. The problem was caused by the vehicle rolling sideways and coming into contact with the tractor's fenders and tires.

In the present invention, the auxiliary stabilizer 15 is arranged in addition to the check chain 20, and the mounting body pivot 15a of the auxiliary stabilizer 15 and the pivot base 13a of the lower link 13 are arranged with their positions shifted. As the plow approaches its raised position, the auxiliary stabilizer 15 restricts the plow's rolling, thereby preventing the plow from coming into contact with the fenders or tires.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of the agricultural tractor, Fig. 2 is a side view of the work equipment mounting device of the present invention, Fig. 3 is a plan view of the right half looking in the direction of movement, and Fig. 4 is a plan view of the right half in the direction of movement. It is a plan view of the left half. 11...Top link, 12...Lift arm, 13...Lower link, 20...Check chain, 15...Auxiliary stabilizer.

Claims (1)

[Scope of utility model registration request] The rear end of the check chain 20 is pivotally connected to the outside in plan view across the lower link 13, and the rear end of the auxiliary stabilizer 15 consisting of a chain is pivotally connected to the inside. and the pivot base 13a of the lower link 13
are arranged substantially on the same center when viewed from the side, and the mounting body pivot portion 15a at the front end of the auxiliary stabilizer 15 is located at a rear position farther away from the pivot base portion 13a of the lower link 13 when viewed from the side. A working machine mounting device for an agricultural tractor, characterized in that the auxiliary stabilizer 15 is configured to be tensioned.