JP2534756Y2 - Connecting device mounted on tractor - Google Patents

Description

[Detailed description of the invention] [Industrial applications]

The present invention relates to an improvement of a connecting device mounted on a tractor.

[Prior art]

This type of technology has been proposed by the same applicant as Japanese Utility Model Laid-Open No. 2-14.
No. 906 is known. In this known technique, the support plate supporting one end of the universal joint transmitted from the tractor PTO is elastically attached by a coil spring. Therefore, the input shaft on the working machine has a spline mismatch or a manufacturing error. The present invention relates to a technology for absorbing misalignment and performing self-alignment for smooth mating.

[Problems to be solved by the invention]

In the above-mentioned technology, when heavy work is performed, for example, in rotary tilling of clayey soil or the like, there is a problem that a compression action is performed in which the holding metal supporting the yoke tries to escape to the elastic body side, and escapes from the input shaft on the working machine side. was there.

[Means for solving the problems]

In order to solve the above-mentioned problem, a pair of left and right lower hooks having a top hook and a stop hook are arranged on a connecting hitch connected to the rear end of the three-point link of the tractor, and a board is arranged at the center of the hitch. Then, a holding metal supporting one end yoke of a universal joint having one end mounted on the tractor PTO is press-bonded by an elastic body to the inside of the substrate, and a lever for locking and releasing the left and right stop hooks is arranged. In addition, the present invention provides a connecting device to be mounted on a tractor, in which the lever and a stopper for locking the movement of the holding metal are interlocked.

[Action]

The lower pin and the universal joint are connected at the same time as the top pin of the work machine is hooked and suspended by the connecting hitch of the present invention mounted on the three-point link of the tractor.
Thereafter, when the lever is returned, the left and right stop hooks engage the lower pin, and at the same time, the stopper engages with the brim surface of the retainer to prevent the elastic body from being moved by the compressive action. Therefore,
It does not cause the dosing of the dowel in clay soil or the like.

【Example】

The configuration will be described based on the drawings embodying the present invention. FIG. 1 is a side view of the embodiment of the present invention, in which the top of the mast frame 1 is connected to a top link 2 and a top hook 4 is provided at the rear. The front portions at the lower left and right sides are connected to the lower link 3, and the lower hook 6 is disposed at the rear to form a connection hitch as a whole. Reference numeral 7 denotes a fixing member, which is disposed at the center of the connecting hitch and has a substrate 9 suspended therefrom. The substrate 9 has a third
As shown in the figure, a holding metal 14 is wound around a vault 23 by winding a coil spring 22 around a surface on the tractor side in the front-rear direction. The holding metal 14 supports one end of the yoke of the universal joint mounted on the tractor PTO at one end, and has a front inclined front inclined surface. Reference numeral 5 denotes a retaining hook, which rotates upward with the support shaft 5 as a fulcrum. FIG. 2 is a front view with a part thereof omitted. A lever 18 is fixed to a bifurcated rod II24, and f1 of the link frame 17 (first
(Fig.). Since the lower end of the rod II is fixed to the upper part of the stop hook 5, when the lever 18 is pulled upward, the stop flash 5 is also opened. The base of the lever 18 is connected to the stopper 19 via a rod 120. The base of the stopper 19 is rotatable upward by a pin 15. Accordingly, when the lever 18 is pulled upward, the stopper 19 which has been engaged with the brim surface 21 which is the back surface of the holding metal 14 is released simultaneously with the release of the stop hook 5. When the lever 18 is returned, both sides are locked together. Reference numeral 25 denotes a winding spring, which always presses the stop hook 5 to the lock side.

【effect】

With the above configuration, the retainer can lock the movement of the lower hook at the same time as the locking hook of the lower hook is engaged when the work machine is attached, so that the power transmission is ensured without additional work in advance. is there.

[Brief description of the drawings]

FIG. 1 is a side view partially embodying the present invention. FIG. 2 is a front view partially omitted. FIG. 3 is a plan sectional view of a main part. 1 is a mast frame, 2 is a top link, 3 is a lof link, 4 is a top hook, 5 is a stop hook, 6 is a lower hook, 7 is a fixing member, 8 is a support shaft, 9 is a board, 19 is an input shaft, 11 is a top pin, and 12 is a work machine. 13 is a lower pin, 14 is a retainer 15 is a pin, 16 is a yoke 17 is a link rod, 18 is a lever 19 is a stopper, 20 is a rod I 21 is a collar, 22 is a coil spring 23 is a vault, and 24 is a rod II 25 Winding spring

Claims (1)

(57) [Scope of request for utility model registration] 1. A pair of left and right lower hooks having a top hook and a stop hook are provided on a connecting hitch connected to a rear end of a three-point link of a tractor, and a board is provided at the center of the hitch. A retainer supporting the other end yoke of the universal joint with one end attached to the tractor PTO is pressed inside by an elastic body, and a lever for locking and releasing the left and right stop hooks is arranged, and
A coupling device mounted on a tractor, wherein the lever and a stopper that locks the movement of the holding metal are interlocked.