JP2653829B2 - Work machine mounting mechanism for vehicle height adjusting tractor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial application field The present invention provides a method for car cultivation in order to make it possible to carry out medium tilling and soil filling while passing crops on ridges in vegetation, in addition to ordinary tilling work. The present invention relates to a work machine mounting device for a vehicle height adjusting tractor capable of changing a height to a height.

(B) Conventional technology Conventionally, technology relating to a vehicle height adjusting tractor has been known.

For example, as disclosed in Japanese Utility Model Laid-Open Publication No. 57-47107.

Further, in a rotary tilling apparatus, a technique in which a tilling cover and a rear cover can be rotated back and forth with respect to a power transmission case is known.

For example, Japanese Utility Model Laid-Open No. 57-154906 and JP-A-51-5750.
It is like the technique described in Japanese Patent Publication No. 7-107.

(C) Problems to be Solved by the Invention However, in the prior art, by moving the tractor back and forth, the work machine can be automatically mounted by the mechanical force on the tractor side. If the tractor's height changes to either high or low when equipped with a machine mounting mechanism, the vertical position of the three-point link type mounting mechanism changes accordingly. Is changed, and it is difficult to match the two.

The present invention is configured such that the work machine can be easily mounted even when the vehicle height on the tractor side changes in this way.

(D) Means for Solving the Problems The object of the present invention is as described above, and a configuration for achieving the object will be described below.

A work machine mounting device that can be moved up and down is disposed at the rear of the body of the agricultural tractor whose height can be adjusted. The work machine mounting device includes a top hook 3 and a lower hook 4, and is provided on the side of a rotary tilling device that is a working machine. , A top pin 1 and a lower pin 2 which are engaged with a top hook 3 and a lower hook 4 are arranged. 9
A cultivating cover 8 and a fixable rear cover 7 that are relatively rotatable about a cultivating claw axis, and are relatively rotatable about a claw axis between the power transmission case 9 and the cultivating cover 8. The tillage cover adjusting mechanism 5 is interposed.

(E) Embodiment The purpose and configuration of the present invention are as described above. Next, the configuration of the embodiment shown in the attached drawings will be described.

FIG. 1 is a side view showing a working machine mounting posture in a state where the vehicle height is increased, FIG. 2 is a side view showing a working machine mounting posture in a state where the vehicle height is lowered, and FIG. FIG. 4 is a side cross-sectional view of an electric adjustment mechanism that electrically adjusts the work implement main body, with only the power transmission case 9, the power transmission case 9, and the top link mast 14 taken out.

Final shaft 22 of tractor side transmission case M
, The axle case 21 rotates up and down, and the axle position O of the rear wheel B can be changed to O1 and O2 when the vehicle height is low.

When the high axle position O1 is set by the mechanism, the rear wheel B1 comes into contact with the ground surface GL1 in FIG. 1 and the working machine is also placed on the ground surface GL1. .

When the vehicle is in the low vehicle height state of the axle position O2, the second
As shown in the figure, the rear wheel B2 is in contact with the ground surface GL2,
The work equipment is also in contact with the ground surface GL2.

In the three-point link mounting mechanism on the tractor side, the top link 10 is pivotally supported by a top link hinge 13 attached to the rear surface of the transmission case M.

As described above, when the top link is constituted by the top link hinge 13 on the side fixed to the transmission case M and the top link 10 on the rear rotating side, and the special top link mechanism is used, the top link 10 is suddenly moved at the end of ascent. This makes it possible to store the rear of the work machine in a state where it is attracted near the tractor.

The front end of the lower link 11 is pivotally supported by the lower part of the transmission case M, and the rear end is pivotally supported by the lower hook 4 at the lower part of the hitch frame 12.

At an intermediate position of the lower link 11, a lift arm and a lift link protrude from a hydraulic device arranged above the transmission case M, and are pivotally supported. The lower arm 11 is vertically moved by rotating the lift arm up and down by a hydraulic cylinder. It is turned.

By the rotation of the lower link 11, the hitch frame 12 supported by the top link 10 and the lower link 11 moves up and down.

The hitch frame 12 is formed in an inverted U-shape, and the top link 10 is pivotally supported at a point of the hitch frame 12,
The top hook 3 is arranged in this part, the lower link 11 is pivotally supported at the left and right ends, and the lower hooks 4, 4 are arranged in this part.

Then, the top pin 1 and the lower pins 2, 2 with which the top hook 3 and the lower hooks 4, 4 are engaged are arranged on the working machine side.

The top pin 1 is located at the front end of the top link mast 14, and the lower pin 2 is a main beam or power transmission case 9.
And so on.

In the working machine of the present invention, the cultivation cover 8 and the fixable rear cover 7 are integrally rotatable back and forth with respect to the working machine main body including the top link mast 14, the main beam, and the power transmission case 9. is there.

In this way, by rotating the tilling cover 8 and the fixable rear cover 7 back and forth, the tilling cover 8 and the fixable rear cover 7 can be arranged at the optimum positions even when the cultivation depth is adjusted to a shallow depth. It is.

Further, in the conventional rotary tilling apparatus, the fixable rear cover 7 is freely rotatable vertically, but in the present invention, the fixable rear cover 7 is also fixed at an angle with respect to the cultivation cover 8. Thus, simultaneously with the rotation of the tillage cover 8, the fixable rear cover 7 is also integrally rotatable at a fixed position.

When the angle between the fixable rear cover 7 and the cultivation cover 8 is changed, the bolt on the angle adjusting rod 30 is loosened and adjusted.

In addition, a three-point link type mounting mechanism and a working machine are mounted on the front part of the cultivation cover 8 so that the operator can automatically mount the machine with one touch by moving the machine backward while riding on the tractor. The stand 6 for fixing the position can be attached.

Therefore, the stand 6, the tilling nail 15, and the fixable rear cover 7
By grounding the portion, the working machine can be fixed.

In this state, the cultivation cover 8 rotates with respect to the power transmission case 9 by rotating the cultivation cover adjustment mechanism 5 for adjusting the threaded rod 17 interposed between the top link mast 14 and the cultivation cover 8. Instead, the power transmission case 9 rotates with respect to the cultivation cover 8.

In the present invention, the tilling cover 8 is fixed and the power transmission case 9 is fixed.
Utilizing the state in which the vehicle rotates, it is easy to mount the working machine when the height of the vehicle is changed.

In FIG. 4, a screw-type cultivation cover adjusting mechanism 5 is shown.
Is a motorized mechanism.

That is, the rotation of the motor shaft 24 of the electric motor 35 is reduced by the reduction gears 25, 26, 27, 28 and transmitted to the male screw shaft 23b, and the female screw body 23c is moved up and down by the male screw shaft 23b. Body 23
The connecting portion 23a is moved up and down via a cylindrical body 23d fixed to c. 23e is a protection cylinder.

The electric mechanism configured as described above is replaced with the tillage cover adjusting mechanism 5.
Can be arranged in place of.

(F) Operation of the invention When the vehicle height changes, the position of the three-point link mounting mechanism protruding from the transmission case M moves up and down.

1 and 2, the position of the transmission case M is not changed, and the rear wheel B and the working machine are shown in a vertical view. However, the positions of the rear wheel B and the working machine are actually That is, the transmission case M and the three-point link type mounting mechanism move up and down.

Therefore, when the vehicle height is changed to a height, the position of the three-point link mounting mechanism moves up and down accordingly, so that the mounting part on the working machine side and the position of the three-point link mounting mechanism are shifted.
It becomes difficult to attach the work machine.

For example, when changing from a high vehicle height position (FIG. 1) to a low vehicle height position (FIG. 2), the portions of the transmission case M and the three-point link mounting mechanism are lower than the working machine. As shown by a solid line in FIG. 2, the hitch frame 12 connecting the top hook 3 for locking the top pin 1 and the lower hook 4 for locking the lower pin 2
In order to receive the top pin 1 placed at a high position,
It is necessary to pivot the top link 10 and the lower link 11 largely.

In particular, since the top link 10 is configured as a special top link mechanism, if the top pin 1 is largely turned upward to receive the top pin 1 in the top hook 3, the hitch frame 12 will have a high vehicle height shown in FIG. The posture changes from a nearly vertical posture to a posture that has fallen in front of FIG.

As a result, the distance A1 in FIG. 1 changes from the distance A1 in FIG. 2 to the distance A2 in FIG. 2 in terms of the horizontal distance between the top hook 3 and the lower hook 4.

Due to such a change, the top hook 3 is in a lying state, and it is difficult to receive the top hook 3 on the top pin 1.

In order to eliminate this state, when the vehicle height is low, the work implement may have a lower posture.

However, since the work machine cannot be buried in the soil,
In the present invention, the tillage cover 8 is attached to the power transmission case 9 by the tillage cover adjusting mechanism 5 while the work implement is supported at the tillage claws 15 and the front stand 6 and the rear fixable rear cover 7 at three points. When the tillage cover 8 is adjusted to be changed, the tillage cover 8 is fixed at the front part by the stand 6 and the rear part by the fixable rear cover 7 and is fixed at the lower part by the tillage claw 15 so that it cannot rotate, and instead, the power transmission is performed. The case 9 and the top link mast 14 attached thereto rotate back and forth, and as a result, the top bin 1 fixed to the tip of the top link mast 14 and the lower pin provided on the power transmission case 9 or the main beam portion. The part 2 comes down in a state of lying forward.

Accordingly, the position of the top pin 1 can be particularly reduced to the height H2, and the top pin 1 and the top hook 3 can be locked without raising the top hook 3 high.

By operating the tillage cover adjusting mechanism 5 and rotating the power transmission case 9 forward about the claw shaft 20 with respect to the tillage cover 8, the top pin 1 can be lowered.

As a result, the same condition as when the vehicle height on the tractor side is lowered is also generated on the side of the work machine, and both are at low positions, so that mounting is possible.

When the position is changed from the low vehicle height position to the high vehicle height position, the position of the top pin 1 is too low as H2 as it is, so the tilling cover adjusting mechanism 5 is again adjusted in the reverse direction, The power transmission case 9 and the top link mast 14 are rotated upward about the claw shaft 20 to return the position of the top pin 1 to the original height H1.

This makes it possible to obtain a state in which the top hook 3 and the top pin 1 are always engaged in the same posture.

(G) Effects of the Invention The present invention is configured as described above, and has the following effects.

First, in a vehicle height adjusting tractor, when the vehicle height is changed, the three-point link type mounting mechanism also moves up and down, but since the working machine does not move up and down, a gap occurs between the two and it is difficult to mount the working machine. It is becoming.

On the other hand, with the configuration according to the present invention, the position of the top pin 1 at the tip of the working machine can also be adjusted up and down. It could be changed to make it easier.

Secondly, a cultivation cover adjusting mechanism 5 of a device capable of rotating the cultivation cover 8 and the fixable rear cover 7 forward and backward with respect to the working machine body, and a mechanism for adjusting the position of the front end of the working machine up and down. The dual use also facilitated the mounting of the working machine without providing a new mechanism separately.

[Brief description of the drawings]

FIG. 1 is a side view showing a working machine mounting posture in a state where the vehicle height is raised, FIG. 2 is a side view showing a working mounting posture in a state where the vehicle height is lowered, and FIG. FIG. 4 is a side cross-sectional view of an electric adjustment mechanism that electrically adjusts the working machine main body when only the power transmission case 9 and the top link mast 14 are taken out. 1 top pin 2 lower pin 3 top hook 4 lower hook 5 tillage cover adjustment mechanism 6 stand

 ──────────────────────────────────────────────────続 き Continued on the front page (56) References JP-A-51-57507 (JP, A) JP-A 63-33705 (JP, U) JP-A 57-47107 (JP, U) JP-A 60-33 177708 (JP, U) Japanese Utility Model Showa 57-154906 (JP, U)

Claims (1)

(57) [Claims] 1. A work implement mounting device that can be lifted and lowered is disposed at the rear of the body of an agricultural tractor whose vehicle height is adjustable. The work machine mounting device includes a top hook 3 and a lower hook 4.
A top pin 1 and a lower pin 2 that engage with a top hook 3 and a lower hook 4 are arranged on the side of the rotary tilling device that is a working machine, and the top pin 1 and the lower pin 2 are located on the side of the power transmission case 9 of the rotary tilling device. The power transmission case 9 is provided with a cultivation cover 8 and a fixable rear cover 7 which are relatively rotatable around the cultivation claw axis with respect to the power transmission case 9, and a claw is provided between the power transmission case 9 and the cultivation cover 8. A work machine mounting mechanism for a vehicle height adjusting tractor, comprising a tillage cover adjusting mechanism 5 that is relatively rotatable about an axis.