JPH0488902A - Working tool connection guide in moving vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to an automatic guide device for connecting a work implement for a mobile vehicle.

This invention allows a working tool, such as a rotary tiller, to be attached to the body of a moving vehicle via a link and a hitch.
If you want to install it with one touch, you only need to operate the swinging rod a little bit, and as the work equipment is installed, it will automatically engage the link for installation and the pitch for installation. .

[111M to be solved by the prior art and the invention] As shown in Japanese Utility Model Application Publication No. 2-36913, a conventionally known elevating link consisting of a top link and a lower link provided at one end of a moving vehicle so as to be movable up and down. On the other hand, in order to attach and detach the work tool with one touch, the tips of the lifting links are connected by a hitch frame with an output clutch body in the center, and the corresponding input clutch body is connected in the center on the work tool side. When installing and disengaging, both pitches were simultaneously engaged or disengaged with one touch while telescopically moving the input/output clutch body, and during tillage work, the telescopic movement of the input/output clutch body was regulated by a restrictor. .

This is because such conventional clutches restrict the expansion and contraction movement of the human-powered clutch body using a manually operated restriction device.

Each time the work equipment was attached or removed, it was necessary to get off the tractor and operate it, making it difficult for the elderly, women and men to use.

[Means for Solving Problem 11] The present invention aims to solve these problems of the conventional device, and takes the following technical measures.

That is, it is provided so that it can be raised and lowered with respect to the vehicle body 1. Top link 2
and an output clutch body 7 which is rotated by an upper engagement part 4, left and right lower engagement parts 5, 5, and a power take-off shaft 6 on the vehicle body 1, extending between the tips of the left and right lower links 3. Attach the hitch frame 8, while the hitch frame 8
An upper locking part 11, left and right lower locking parts 12, 12, and an input clutch body, which receive the upper part of a working pitch 10 that is integrated with a working machine body 9 and can be attached and detached by swinging the do part back and forth. 13, and when the input/output clutch bodies 13, 7 are attached or detached, the output clutch body 7 is supported so as to be movable in the front and rear direction approximately along the axial direction, and the input/output clutch bodies 13, 7 are When the work is completed after the installation of the output clutch body 7 is completed, in the case where a restriction device 14 is provided to restrict the approach movement toward the fuselage 1 side in the axial direction of the output clutch body 7, a part of the release operation tool 15 of the restriction device 14 is engaged. Attach the stopper 35 and
and an output clutch body 7 on the vehicle body 1 side, a swinging rod 36 is disposed around a fulcrum 37 on a hitch frame 8 so as to be swingable back and forth and detachable. It is configured as a guide device.

[Effects of the Invention] With the above-described configuration, the present invention provides the following technical effects. That is, a locking tool 35 is attached to a part of the release operation tool 15 of the output clutch body 7, and a swinging rod 36 is mounted on the hitch frame 8 between the locking tool 35 and the surface of the output clutch body 7 on the vehicle body 1 side. Since it is arranged so that it can swing back and forth around the fulcrum 37 and can be engaged and disengaged, when installing the work machine, the first operation is to first operate the release operation tool 15 to enable movement of the output clutch body 7 in the axial direction. The return of the release operating tool 15 is controlled by applying the end of the swinging rod 36 to the locking tool 35 that is integrated with the operating tool, and then, as a second operation, When the locking portion 11 is hooked and lifted by the upper engaging portion 4 on the hitch frame 8 side, the lower input clutch 13 portion pushes the output clutch 7 toward the vehicle body 1 side.

By pushing the output clutch 7 toward the vehicle body 1, the swinging rod 3
6 is removed from the locking tool 35, and the release operating tool 15 is automatically changed to the side that restricts the output clutch 7, eliminating the need for manual operation.

[Embodiment] An embodiment of the present invention will be described in detail below with reference to one drawing. However, the dimensions, materials, shapes, relative arrangements, etc. of the component parts described in this example are not intended to limit the scope of this invention to only those, unless there is a specific description. , is merely an illustrative example.

Rotation is carried out via a hitch frame 8 attached to the free end side of a three-point link, which is attached to the rear of the vehicle body 1, which is an agricultural tractor, so that it can be raised and lowered, and which is attached to the machine frame of the work machine body 9, which is a rotary tillage device. The purpose is to automatically and easily attach a work hitch 10 with a simple operation.

The three-point link consists of a top link 2 and lower left and right lower links 3, 3. The top link 2 is attached to the vehicle body 1 via a mounting base 16, and the lower link 3 connects a lift rod 17 to the middle part in the longitudinal direction. A lift arm 18 rotatably disposed on the vehicle body moves up and down.

Each free end side of the three-point link is connected by a hitch frame 8.

The hitch frame 8 has a substantially triangular shape when viewed from the rear, and consists of an upper engaging part 4 at the upper center and lower engaging parts 5.5 at the lower left and right sides, and a connecting part is opened rearward in the central part. An output clutch body 7 is provided.

On the park side, the output clutch body 7 is a part of a universal joint 2o with a spline hole on the opening side and a cross joint 19 on the vehicle body 1 side, and is a support attached to the hitch frame 8 so as to be swingable in the longitudinal direction. It is supported by the case 21 via a bearing (not shown), and is pulled a certain amount toward the opening side by a tension spring 22.

The universal joint 20 has joints at both front and rear ends, and an intermediate portion that expands and contracts, and transmits the power of the power take-off shaft 6 to the output clutch body 7.

The upper engagement part 4 of the hitch frame 8 is an engagement groove with an open top, and consists of two width plates 38, 38 on the left and right sides with a tongue-shaped guide stand 23 protruding from the outer end surface. ing.

A retaining plate 39 is attached to the side of the left width plate 38,
The upper end of the release operating tool 15 is provided to protrude so as to be movable in the axial direction.

A triangular locking tool 35 having a base 40 is integrally provided on the protruding portion of the release operating tool 15 .

The lower end of this release operation tool 15 is pivoted to a bell crank-shaped restriction tool 14, and the intermediate portion is an interlocking rod 24.
A compression spring 26 is inserted into the upper part of this interlocking rod 24, and the release operation tool 15 is pushed down, and the lower end restriction tool 1
4 about the swing axis 30 in the direction of arrow A.

In both FIG. 1 and FIG. 2, the locking tool 3 of the release operation tool 15 protruding part
The upper end of the swinging rod 36 is pushed into the bottom side 40 of the release operating tool 15 to restrict the downward movement of the release operating tool 15.

The swinging feeling 36 is attached at its vertical intermediate portion to a fulcrum 37 provided on the hitch frame 8 so as to be swingable in the front and rear directions.

When the swinging rod 36 is swung forward, the protrusion of the release operating tool 15 comes into contact with the bottom 40 of the locking tool 35, i=1, as described above, and when it is swung backward, the support at the bottom 4o is removed. Since it disappears, the release operation tool 15 is forced in the direction of the arrow by the compression spring 26.

The lower end of the swinging rod 36 hangs down from the front wall of the support case 21 on the vehicle body 1 side, which is attached to the hitch frame 8 so as to be swingable in the longitudinal direction.

That is, the output clutch body 7 housed inside the support case 21
When the work body 9 is attached, when the input clutch body 13 pushes forward, the protruding portion of the release operating tool 15 automatically moves downward in the direction of the arrow.

At the front of the machine frame of the work body 9, there are an upper locking part 11 at the upper center and lower locking parts at the lower left and right sides, which are also approximately triangular, at positions corresponding to the upper and lower engaging parts 4 and 5 of the hitch frame 8. 12,1
2, and an input clutch body 13 having a connecting portion protruding forward is disposed in the center thereof.

On the park side, the input clutch body 13 is simply a spline shaft,
The upper and lower locking parts are simply pin shafts arranged in the horizontal direction.

The lower engaging portions 5, 5 of the hitch frame 8 are groove portions in the front and back direction that are open on the work machine body 9 side, and a locking arm 31, 31 extending beyond the fulcrum is provided at the open end.

To attach the work machine body 9 to the hitch frame 8, after bringing the work machine to the dark state shown in FIGS. Approach the work machine 9 left on the ground in a state lowered below the horizontal pin axis of the work machine 9 and scoop it up from below.

The working pitch 10 is such that the lower part approaches the upper part with the upper part as the center of rotation, and the lower part is assembled while the input/output clutch bodies 13 and 7 are telescopically engaged.

At this time, the output clutch body 7 installed inside the support case 21
However, when pushed forward by the input clutch body 13, the upper end of the swinging rod 36 escapes backward, so the protrusion of the release operating tool 15 automatically moves downward in the direction of the arrow, and the next input is performed. The output clutch bodies 13 and 7 automatically engage to provide P for tilling work, etc.
, T, O work can be done easily.

FIGS. 4 and 5 are separate illustrations of manual release operating tool 15a, in which a bell-crank-shaped regulating tool 14 is integrally mounted on the back of regulating tool 14 with a pivot axis 30 as the center. When the release operating tool 15a is manually locked upwardly to the holder 33, it is in the release position where the work equipment can be attached and detached, and the hitch frame 8 The locking arm 31 of the lower engaging portions 5, 5, which extends beyond the fulcrum to which the work machine 9 side is attached, is released to the work machine attachment side.

If the release operation tool 15a is not pulled up, the locking arm 2
1 and 31 do not rotate and the pin of the lower locking portion 12 does not reach the specified position, the input/output clutch body 13.7 remains open.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a perspective view of the main part of the first rotation seen from the rear, Fig. 2 is a front perspective view of the main part, and Fig. 3 is a partial view. 4 is a perspective view of the main part of the example shown in Fig. 2 as seen from the rear, and Fig. 5 is a front perspective view of the main part. , 3 is a lower link, 4 is an upper engaging part, and 5 is a lower engaging part. 6 is a power take-off shaft, 7 is an output clutch body, 8 is a hitch frame, 9 is a work machine, 10 is a work hitch, 11 is an upper locking part, 12 is a lower locking part, 13 is an input clutch body, 14
Reference numeral 15 indicates a restricting tool, 15 indicates a release operation tool 35, a locking tool, 36 indicates a swinging rod, and 37 indicates a fulcrum.

Claims (1)

[Claims] (1) Top link 2 installed in the vehicle body 1 so that it can be raised and lowered freely
and between the tips of the left and right lower links 3, 3, an output clutch body 7 rotated by an upper engagement part 4, left and right lower engagement parts 5, 5, and a power take-off shaft 6 on the vehicle body 1 side. Attach the hitch frame 8, while the hitch frame 8
An upper locking portion 11, left and right lower locking portions 12, 12, and an input clutch body 13, which receive the upper portion of the work hitch 10 integrated with the work machine 9 and allow the lower portion to be attached and detached by swinging back and forth. A work hitch 10 is provided, which supports the output clutch body 7 so as to be movable in the front-back direction approximately along the axial direction when the input/output clutch bodies 13, 7 are attached or detached, When the work is completed, a locking tool is attached to a part of the release operation tool 15 of the restriction device 14 in the case where the restriction device 14 is provided to restrict the approaching movement toward the fuselage 1 side in the axial direction of the output clutch body 7. 35, and this locking tool 35
and an output clutch body 7 on the vehicle body 1 side, a swinging rod 36 is disposed around a fulcrum 37 on a hitch frame 8 so as to be swingable back and forth and detachable. Guidance device.