JPH0724961Y2 - Shock absorber for work equipment for tractors - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock absorber for a working machine for tractors such as plows and subsoilers.

[0002]

2. Description of the Related Art Conventionally, there is no work machine for a tractor such as a plow or a subsoiler equipped with a shock absorbing device.
In this case, there is a structure in which a shear pin is interposed between the frame and the plow so that when the working machine hits an obstacle, the shear pin is broken to prevent the working machine from being damaged.

[0003]

The problems described in the prior art have the following problems. When the work machine hits an obstacle on the ground or an obstacle which is not visible in the ground during the towing work by the tractor, the work machine is damaged or the tractor engine stops.
Examples of obstacles include concrete foundations, piles,
There are roots and fallen trees. In the case of adopting the sharpin, 20 to 30 pieces may be broken per day, which is a fact that the work efficiency is hindered.

The present application has been made in view of the above problems of the prior art, and an object of the present application is to provide a device capable of solving the above problems.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the present invention is as follows. That is, in the one of the present application, the shock absorber unit 3 is disposed at the rear end of the main frame 2A, and the shock absorber unit 3 is connected with the working machine such as the plow body 4 and the knife for the subsoiler via the beam 5. This shock absorber unit 3 is composed of a fixed disk 3A fixed to the main frame side and a rotating disk 3B that contacts the fixed disk 3A, and a projection 3A2 having a trapezoidal cross section is suitable for the contact surface of the fixed disk 3A. Several pieces are projected,
In addition, the bolt support block 3B1 at the center of the rotating disk 3B
An appropriate number of grooves 3B2 having a V-shaped cross section that correspond to the protrusions 3A2 and engage with and disengage from the protrusions 3A2 are formed on the outer periphery of the fulcrum, and the fulcrum bolt 3C that penetrates the bolt support block 3B1 is a fixed disk. 3C, a shock absorbing device in a working machine for a tractor in which a pressing coil spring 3C2 is arranged between an inner surface of a fixed disk 3A and a tightening nut 3C1 screwed to an inner end of the fulcrum bolt 3C. is there.
In this case, the protrusion 3A2 of the fixed disc 3A may be replaced with a protrusion 3A3 having a semicircular cross section, and the rotating disc 3B may be used.
Instead of the groove 3B2, a groove 3B3 having a semicircular cross section can be formed. Then, instead of the protrusion 3A2 of the fixed disk 3A, a protrusion 3A4 having a semi-spherical cross section may be used.
Instead of the groove 3B2 of the rotating disk 3B, a depression 3 having a semispherical cross section.
It can also be configured to B4.

[0006]

EXAMPLES Examples will be described with reference to the drawings. 1
Is a shock absorbing device in the tractor working machine of the present invention. Reference numeral 2 is a frame composed of a main frame 2A, a cross frame 2B connected to the tip of the main frame, and posts 2C planted in the cross frame. Reference numeral 3 denotes a shock absorber portion arranged at the rear end of the main frame 2A. Reference numeral 4 is a plow body connected to the shock absorber unit 3 via a beam 5.

Therefore, the shock absorber 3 is composed of a fixed disk 3A fixed to the main frame side and a rotating disk 3B which abuts against the fixed disk 3A, and a flat portion 3A1 at the center of the abutting surface of the fixed disk 3A. A proper number of projections 3A2 having a trapezoidal cross section are provided in a radial shape, and the projections 3A2 are formed on the outer periphery of the center bolt support block 3B1 on the contact surface of the rotating disk 3B.
A cross section V corresponding to A2 and engaging with and disengaging from the ridge 3A2.
A proper number of V-shaped grooves 3B2 are formed, and the fulcrum bolt 3C penetrating the bolt support block 3B1 also penetrates the flat portion 3A1 and further the tightening nut 3C1 screwed to the inner end of the fulcrum bolt 3C. A pressing coil spring 3C2 is arranged between the inner surface of the fixed disk 3A and the fixed disk 3A.

Incidentally, referring to FIGS. 6 and 7, the fixed disk 3A
The protrusion 3A2 may be replaced by a protrusion 3A3 having a semicircular cross section, and the groove 3B2 of the rotary disk 3B may be replaced by a groove 3B3 having a semicircular cross section. 8 and 9, the protrusion 3A2 of the fixed disc 3A is replaced with a protrusion 3A4 having a semi-spherical cross section, and the groove 3 of the rotating disc 3B is formed.
Instead of B2, a recess 3B4 having a semi-spherical cross section can be formed. Furthermore, the above is the case of plow,
This can be applied to the case of the subsoiler 6 equipped with the knife 6A as shown in FIG.

The present invention operates as follows. By tightening the tightening nut 3C1 of the fulcrum bolt 3C, it is possible to adjust the degree of meshing between the protrusion 3A2 of the fixed disk 3A and the groove 3B2 of the rotating disk 3B.
When the plow body 4 is loaded with a load more than a predetermined amount during the work, the protrusion 3A2 is disengaged from the groove 3B2, and the rotating disk 3B rotates around the fulcrum bolt 3C to perform a buffering action. Such an action is achieved by the protrusion 3A3 having a semicircular cross section.
And the groove 3B3 having a semicircular cross section, the same applies to the relationship between the protrusion 3A4 having a semispherical cross section and the recess 3B4 having a semispherical cross section.

[0010]

Since the present invention is constructed as described above, it has the following effects. Since the shock absorber unit 3 operates as described above, it is possible to prevent the working machine from being damaged. In addition, when the shock absorber device 3 acts, it returns to a normal state, but the operator lowers the working machine to the ground with the hydraulic lever while riding on the driver's seat of the tractor, and thereafter, this working machine is removed. By slightly retracting the tractor while being in contact with the ground, the shock absorber device 3 can be returned to its original state. As a result, workability can be significantly improved.

[Brief description of drawings]

FIG. 1 is an overall perspective view.

FIG. 2 is a perspective view of a state in which a shock absorber device operates.

FIG. 3 is an enlarged plan view of an essential part of the above.

FIG. 4 is an enlarged sectional view taken along line AA.

FIG. 5 is an enlarged sectional view taken along line BB.

FIG. 6 is an exploded perspective view of another embodiment.

FIG. 7 is a vertical sectional view of the above.

FIG. 8 is an exploded perspective view of another embodiment.

FIG. 9 is a vertical sectional view of the above.

FIG. 10 is a perspective view of a subsoiler.

[Explanation of symbols]

 1 shock absorber in tractor work machine 2 frame 2A main frame 2B cross frame 2C post 3 shock absorber part 3A fixed disk 3A1 flat part 3A2 ridge 3B rotating disk 3B1 bolt support block 3B2 groove 3C fulcrum bolt 3C1 tightening nut spring 3C2 4 Plow body 5 Beam 6 Subsoiler

Claims (3)

[Scope of utility model registration request] 1. A shock absorber section (3) is disposed at a rear end of a main frame (2A), and a plow body (4), a knife for a subsoiler, etc. is provided to the shock absorber section (3) through a beam (5). In the work machine connected, the shock absorber device (3) includes a fixed disk (3A) fixed to the main frame side and a rotating disk (3B) contacting the fixed disk (3A). A suitable number of projections (3A2) having a trapezoidal cross section are radially provided on the contact surface of (3A), and the bolt support block (3) at the center of the rotating disk (3B) is provided.
An appropriate number of grooves (3B2) having a V-shaped cross section corresponding to the protrusion (3A2) and engaging with and disengaging the protrusion (3A2) are formed on the outer periphery of the bolt support block (3B).
The fulcrum bolt (3C) passing through 1) is the fixed disk (3A)
And a pressing coil spring (3C2) is disposed between the inner surface of the fixed disk (3A) and the tightening nut (3C1) screwed to the inner end of the fulcrum bolt (3C). A shock absorbing device for a working machine for tractors. 2. A ridge (3A2) of a fixed disk (3A) is replaced with a ridge (3A3) having a semicircular cross section, and a half section is used instead of the groove (3B2) of the rotating disk (3B). The shock absorbing device for a working machine for a tractor according to claim 1, wherein the shock absorbing device has a circular groove (3B3). 3. The projection (3A2) of the fixed disk (3A) is replaced by a projection (3A4) having a semicircular cross section, and the groove (3B2) of the rotary disk (3B) is replaced by a semicircle of cross section. The shock absorbing device for a tractor working machine according to claim 1, wherein the shock absorbing device has a spherical recess (3B4).