JPS599531Y2 - Attaching/detaching device for work equipment attached to agricultural tractors - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an attachment/detachment device for a working machine attached to an agricultural tractor.

When a working machine is attached to a four-wheeled agricultural tractor, the working machine is attached using a three-point support mechanism consisting of an upper link and a lower link provided at the rear of the tractor.

The present invention improves the existing three-point support mechanism so that it can be easily attached and detached.

To explain with a diagram, reference numeral 1 is an agricultural tractor, which is a four-wheeled riding type.

A front end of a lower link 2 projecting rearward is fixed to a lower position at the rear of the tractor 1 by a shaft 3.

The links 2 are provided as a pair of left and right, and the rear ends 5 of the links 2 are formed with through holes aa in the left and right horizontal directions with respect to the forward direction of the agricultural tractor 1.
The balls 6 and 6 fit into each of the holes.

A shaft hole is formed in the balls 6, 6, and one horizontal shaft 4 is inserted into the shaft hole.
is inserted.

A pipe 7 keeps the distance T between the balls 6, 6 from becoming narrower, and is fitted on the horizontal shaft 4 and provided between the balls 6, 6.

Both ends of the horizontal shaft 4 protrude outward from the ball 6, respectively.
A guide body 8 in the shape of a plate or half plate is detachably fixed to the tip thereof.

The pipe 7 acts so as not to reduce the distance T between the balls 6, 6, but on the outside of the balls 6, 6,
A pipe 9 is attached which acts to prevent the distance T between the balls 6, 6 from increasing.

The pipe 9 is fitted onto the horizontal shaft 4, and the guide body 8 is fixed to the horizontal shaft 4 together with the pipe 9 by a pin b.

Therefore, the guide body 8 and the pipe 9 are integrated through the pin b.

The outer circumferential surface of the pipe 9 between the guide body 8 and the ball 6 becomes a retaining portion A having the same outer diameter from beginning to end.

A front end of a lift arm 10, which is moved up and down by a hydraulic mechanism or the like, is fixed to a shaft 11 at an upper position at the rear of the agricultural tractor 1.

At the rear end of the lift arm 10, the upper end of the rod 12 is connected to the shaft 13.
The lower end of the rod 12 is pivotally fixed to the lower link 2 by a shaft 14.

Therefore, when the hydraulic mechanism of the tractor 1 is operated, the lift arm 10 moves up and down, and the lower link 2 automatically moves up and down via the rod 12.

Atsupa link 1 is located above the rear of agricultural tractor 1.
The front end of 5 is fixed by a shaft 16.

The rear end of the upper link 15 is a free end, and a left-right shaft hole 17 is provided at that end.

The frame 19 of the other working machine 18 has a lower bird engaging rod 20.
and an upper engagement rod 21 are provided.

The rear end of the lower handle rod 20 is fixed to the frame 19, and the front end thereof projects in the direction of the agricultural tractor 1.

At the front end of the engagement punch 0, there is an engagement portion A of the lower links 2, 2.
The engaging body B that engages with is fixed.

A groove 22 opening downward is formed in the engaging body B.

The structure of the engaging body B is as shown in FIG. 3, in which a lock piece 24 is fixed by a shaft 23, a part of the lock piece 24 is shaped to protrude into the groove 22, and the upper surface position of the lock piece 24 is fixed. A U-shaped engagement groove 25 is formed in the locking piece 24, and a lock releasing piece 27 is provided at the upper position of the locking piece 24 and is fixed by a shaft 26.
The lower protrusion 28 of No. 7 is engaged in the U-shaped engagement groove 25.

A rope engagement hole 29 is bored in the upper position of the release piece 27,
The lower end of the rope 30 is connected to this, and a tension spring 31 is interposed between the release piece 27 and the lock piece 24.

Next, we will discuss the effect.

Since the present invention has a predetermined structure, the working machine 18 can be attached and detached very easily.

That is, the rope 30 is made long so that it can reach from the driver's seat of the tractor 1 (used when removing the work implement 18).
, Aya, who brought the Hoaikawa pin with him, gets on the agricultural tractor 1 and quietly moves the tractor 1 backwards until it reaches the vicinity of the work machine 18.

Then, the vehicle is stopped, and the hydraulic mechanism is operated to rotate the lift arm 10 downward about its shaft 11, so that the rear end 5 of the lower link 2 is removed from the groove 22 of the engaging body B of the work implement 18. lower until it is in the lower position (as shown in Figure 2).

In this state, move backward again, stop when the retaining part A reaches the position directly below the groove 22, and operate the hydraulic mechanism to rotate the lift arm 10 upward and pull up the lower link 2. A plate-shaped or half-plate-shaped guide body 8 is provided on both sides of A.
, 8 are installed, the position of the agricultural tractor 1 is
Even if it is shifted to the left or right, the retaining part A easily engages with the groove 22 of the engaging body B.

Then, get off the tractor 1, align the shaft hole 17 at the rear end of the upper link 15 with the shaft hole 32 formed at the upper end of the upper engagement rod 21 of the work implement 18, and insert the retaining pin you brought from the side. Once the work implement 18 is fixed, the installation of the work implement 18 is easily completed.

The structure and operation of the present invention are as described above, and the front ends of a pair of lower links 2, 2 projecting rearward are pivotally attached to the rear part of an agricultural tractor 1 by a shaft 3, and the rear ends of the links 2, 2 are are each formed with a through hole aa in the left and right direction, balls 6, 6 each having an axial hole are fitted into the through hole aa, and the length is longer than the interval T between the separately prepared through holes aa. A long horizontal shaft 4 is provided to be inserted through the shaft holes of the balls 6, 6, and a protruding portion of the horizontal shaft 4 that projects outward from the balls 6, 6 has a length that reaches the balls 6, 6. The expansion prevention pipes 9, 9 of the lower links 2, 2 are fitted, and the guide bodies 8, 8 in the shape of a plate or half plate are fitted on the outer periphery of the outer end portions of the pipes 9, 9. The pipes 9, 9 and the guide bodies 8, 8 are fixed to the horizontal shaft 4 by the pin b, and the guide bodies 8, 8
Since the engaging part A is formed on the outer circumferential surface of the pipe 9 between the balls 6, 6 and the attachment/detachment device for a working machine to be attached to an agricultural tractor, it is different from the three-point support mechanism commonly used in Japan. The retaining portion A can be formed using the upper link and the lower link as they are.

Further, the rear ends of the pair of lower links 2, 2, which move separately in the vertical and horizontal directions and whose positions are not fixed, can be fixed by one horizontal shaft 4.

Also, when forming the retaining part A by using the part that protrudes outward from the through hole aa, the protruding part has a length that reaches the balls 6, 6 fitted in the through hole aa. Since the pipe 9 is fitted, the retaining portion A can be formed very simply and reliably by preventing the lower links 2, 2 from moving outward.

[Brief explanation of drawings]

Figure 1 is a side view of the combined state, Figure 2 is a diagram of the state before combination, Figure 3 is a sectional view of the engaging body, Figure 4 is a diagram of the operation of the engaging body, and Figure 5 is a perspective view of the main parts. , FIG. 6 is a sectional view of the main part, and FIG. 7 is a sectional view of the retaining part. Explanation of symbols, 1...Agricultural tractor, 2...Lower link, 3...Axle, 4...Horizontal shaft, 5...Rear end, 6
... Ball, 7... Pipe, 8... Guide body, 9.
・・Pipe, 10・・Lift arm, 11, 13・
...Axis, 12...Rod, 14, 16...Axis, 1
5... Atsupa link, 17... Shaft hole, 18... Working machine, 19... Frame, 20... Lower engaging rod, 2
1... Upper engaging rod, 22... Groove, 23... Shaft, 2
4...Lock piece, 25...U-shaped retaining groove, 26...
Shaft, 27... Lock release piece, 28... Lower projection, 2
9... Engagement hole, 30... Rope, 31... Tension spring, 32... Shaft hole, A... Engagement part, B... Engagement body, a... Through hole, b...Pin.

Claims (1)

[Scope of Claim for Utility Model Registration] An attachment/detachment device for a working machine to be attached to an agricultural tractor, which meets the following requirements a to d. a The front ends of a pair of lower links 2, 2 protruding rearward are pivotally attached to the rear of the agricultural tractor 1 by a shaft 3, and the rear ends of the links 2, 2 are each formed with a through hole aa in the left and right direction. , balls 6, 6 having shaft holes are respectively fitted into the through holes aa, and a horizontal shaft 4 having a length longer than the interval T between the through holes aa, which is prepared separately, is fitted into the shaft holes of the balls 6, 6. It is installed by inserting it into the. b A pipe 9, 9 for preventing expansion of the lower rings 2, 2 having a length reaching the balls 6, 6 is fitted into a protruding portion of the horizontal shaft 4 that protrudes outward from the balls 6, 6. let C. Dish-shaped or half-dish-shaped guide bodies 8, 8 are fitted onto the outer peripheries of the outer ends of the pipes 9, 9. d The pipes 9, 9 and the guide bodies 8, 8 are fixed to the horizontal shaft 4 by the pin b, and are held on the outer peripheral surface of the pipes 9, 9 between the guide bodies 8, 8 and the balls 6, 6. Shape part A.