JPH0595701A - Tiller pawl attaching device - Google Patents

Abstract

PURPOSE:To prevent rattle of an attaching part of a tilling pawl in a holder and improve durability of the tilling pawl or the holder by fitting an elastic body in a specific state on the side of the attaching base of tilling pawl inserted in the holder. CONSTITUTION:An elastic body 7 which causes elastic deformation by pressing on the inner face of a holder when an attaching base of a tilling pawl is turned around a pin in longitudinal direction and presses and fixes the attaching base of tilling pawl is fitted on the side of the attaching base 5 of the tilling pawl inserted into a holder 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention attaches a mounting base of a plowing pawl to a holder fixed to a plowing shaft through a pin, and the plowing pawl receives a plowing resistance so that the mounting base is centered around the pin. The present invention relates to a tilling claw mounting device in which an elastic body is elastically deformed when it is rotated to press the mounting base part to fix it.

[0002]

2. Description of the Related Art Conventionally, when mounting a plowing pawl on a holder fixed to a plowing shaft, a mounting base of the plowing pawl is fitted into the holder, and a bolt is inserted into a bolt insertion hole formed in the mounting base of the holder and the plowing pawl. It was inserted and tightened with a nut. However, tillage nails are used in the soil,
It will be replaced when it becomes worn or cut, but if the bolts and nuts are rusted or are tightly tightened, it will be troublesome to remove and it will take a lot of time and effort. .. In order to solve such a problem, the mounting base of the plowing pawl is fitted and inserted into the holder fixed to the plowing shaft, and the pin insertion hole formed in the holder and the mounting base of the plowing pawl is
Various types of devices have been proposed in which a pin is inserted to prevent the mounting base of a tilling claw from coming off and used.

[0003]

As in the above-mentioned prior art, when the pin is inserted into the holder to prevent the mounting base of the tilling claw from coming off, the tilling base is not fixed to the holder. I will do the work,
There has been a problem that the mounting base is always loosened in the holder, and damage to the plowing claw and the holder is accelerated. The present invention has been made to solve the above problems.

[0004]

In order to achieve the above object, the present invention has a pin fixed to a holder fixed to a cultivating shaft, into which a mounting base of a cultivating pawl is inserted, and a hole formed in the mounting base of the holder and the cultivating pawl. In the tillage claw attachment device that is used by inserting the pin into the insertion hole and preventing the attachment base of the tillage claw from being used, attach the tillage claw to the side surface of the attachment base of the tillage claw that is inserted and inserted in the holder. When the base is rotated back and forth around the pin, it is elastically deformed by being pressed by the inner surface of the holder, and an elastic body for pressing and fixing the mounting base of the plowing pawl is fitted, and between the mounting base and the elastic body. In addition, another elastic body is inserted, and a load receiving portion for receiving the radial load applied to the mounting base portion of the rotated plowing pawl by surface contact is formed in the holder.

[0005]

By the above means, the tillage claw attaching device of the present invention performs the following actions. On the side surface of the mounting base of the tilling claw that is inserted into the holder,
When the mounting base of the plowing pawl rotates back and forth around the pin, it is elastically deformed by being pressed by the inner surface of the holder, and an elastic body that press-fixes the mounting base of the plowing pawl is fitted. The mounting base is not rattled, the impact load applied to the tilling claw is absorbed by the elastic body, and the existing tilling claw can be used without being tightened with the bolts and nuts. Since another elastic body is inserted between the mounting base and the elastic body, it is more firmly fixed to the holder when the mounting base rotates back and forth around the pin, and also from the tillage claw. The shocks and vibrations of are absorbed. Since the holder is formed with the load receiving portion that receives the radial load applied to the mounting base of the rotated tillage claw by surface contact, the impact load applied to the tiller claw is absorbed in a wide area and the holder and the tillage claw are not damaged.

[0006]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the first embodiment of FIGS. 1 and 2, reference numeral 1 is a tilling claw attaching device, and this tilling claw attaching device 1 is the same as a conventionally known one in which a holder 3 is fixedly mounted on a tilling shaft 2. The holder 3 has a width slightly larger than that of the conventional one, and the mounting base 5 of the tilling claw having a rectangular cross-section is inserted into the space 4 with a predetermined gap from the inner surface of the holder 3. A pin (not shown) is inserted into a pin insertion hole 6 formed in the holder 3 and the mounting base 5 of the tilling claw to prevent the mounting base 5 of the tilling claw from coming off.

Between the side surface of the mounting base 5 of the plowing pawl in the holder 3 and the inner surface of the holder 3, the mounting base 5 of the plowing pawl is provided.
A spring plate 7 having a U-shaped cross section is fitted so as to cover the side surface of the. This spring plate 7 is also provided with a pin insertion hole 6 similar to the holder 3 and the mounting base 5 of the tilling claw. On the inner surfaces of the spring plate 7 and the holder 3, the protrusion 7 is formed on the spring plate 7.
a, 7a and the concave portion 7b, the concave portion 3a,
3a and the convex part 3b are formed corresponding to each other. Also, on the side opposite to the inner surface of the holder 3, the concave portions 3a
The convex portion 3b is formed so that the mounting base portion 5 of the tilling claw and the spring plate 7 can be fitted and inserted even when they are inverted. Then, when the mounting base 5 of the plowing pawl rotates back and forth around the pin, the convex portions 7a, 7a of the spring plate 7 are pressed (narrow pressure) by the inner surface of the holder 3 and elastically deformed, and the plowing pawl's The mounting base 5 is pressed and fixed.

In the tiller pawl mounting device of the first embodiment thus constructed, the tiller pawl mounting base 5 and the spring plate 7 are fitted into the space 4 of the holder, and the solid line in FIG. As shown in FIG. 2A, the pin is inserted straight and the pin is inserted into the pin insertion hole 6 to prevent the pin from coming off. This pin has a structure that prevents it from coming off the pin insertion hole 6 and can be easily inserted and removed. When the cultivating shaft 2 rotates in the direction of the arrow and the cultivating work is performed by the cultivating claw, the cultivating resistance causes the mounting base 5 of the cultivating claw to rotate by α degrees around the pin insertion hole 6, and the virtual line in FIG. Also, as shown in FIG. 2B, the end of the spring plate 7 is locked at a position where it comes into contact with the inner surface of the holder 3.

At this time, the inner surface of the holder 3 comes into contact with the spring plate 7 by the rotation of the mounting base 5 of the tilling claw, and the convex portions 7a, 7a of the spring plate 7 are pressed (narrowed) and elastically deformed. The side surface of the mounting base 5 of the tilling claw is pressed and fixed, and the tilling work is continued in this state. When removing the plowing pawl from the holder 3, the plowing pawl is hit with a hammer to return the mounting base 5 straight as shown by the solid line in FIG. 1 and FIG. 2A, and the pin is pulled out from the pin insertion hole 6. As a result, the tilling claw can be removed from the holder 3 and replaced with a new tilling claw.

As described above, when the mounting base 5 of the plowing pawl is rotated back and forth about the pin, the side surface thereof is pressed and fixed by the spring plate 7, so that the plowing pawl is mounted in the holder 3. The base 5 does not rattle. Therefore, the tilling claw can be fixed to the holder 3 without using the conventional bolts and nuts. Further, the impact load applied to the tilling claw during the tilling work is absorbed by the spring plate 7, and the damage to the tilling claw is prevented. Further, since the tilling claw in which the mounting base 5 has a rectangular sectional shape can be used, the existing tilling claw can be used without being tightened with the bolts and nuts. Further, regardless of whether the cultivating shaft 2 rotates in the forward or reverse direction, the mounting base 5 rotates back and forth around the pin, and the side surface thereof is pressed and fixed by the spring plate 7, so that the forward and reverse rotation is performed. Suitable for use with tillage nails.

The second embodiment of the present invention shown in FIGS. 3 and 4 is similar to the first embodiment described above between the side surface of the mounting base 5 of the tilling claw in the holder 3 and the inner surface of the holder 3. The spring plate 8 having a U-shaped cross section is fitted so as to cover the side surface of the mounting base 5 of the tilling claw, but the inner surface shapes of the spring plate 8 and the holder 3 are different from those of the first embodiment. That is, as shown in FIG. 4, on the inner surfaces of the spring plate 8 and the holder 3, a convex portion 8a is formed on the spring plate 8 and a concave portion 3c is formed on the inner surface of the holder 3, respectively. Further, a concave portion 3c is formed on the opposite side of the inner surface of the holder 3 so that the mounting base 5 of the tilling claw and the spring plate 8 can be fitted and inserted. Further, in the case of this embodiment, a rubber plate 9 (elastic body) is further interposed between the mounting base 5 and the spring plate 8. Then, when the mounting base 5 of the tilling claw rotates back and forth around the pin, the spring plate 8 is moved by the inner surface of the holder 3.
Of the rubber plate 9 is elastically deformed by pressing (narrowing) the convex portion 8a of
The mounting base 5 of the tilling claw is pressed and fixed via the.

In the cultivating claw mounting apparatus of the second embodiment having such a structure, the spring plate 8 is fitted on the side surface of the mounting base 5 of the cultivating claw with the rubber plate 9 interposed therebetween, and in this state the space of the holder As shown by the solid line in FIG. 3 and FIG. 4 (a), the pin 4 is inserted straight into the pin 4, and the pin is inserted into the pin insertion hole 6 to prevent it from coming off. Then, when the cultivating shaft 2 rotates in the direction of the arrow to perform the cultivating work by the cultivating claw, the cultivating resistance causes the mounting base 5 of the cultivating claw to rotate by α degrees around the pin insertion hole 6 as shown in FIG.
As shown by the phantom line and FIG. 4B, the corner portion of the spring plate 8 is brought into contact with and locked to the inner surface of the holder 3, and the mounting base portion 5 of the tilling claw is fixed.

At this time, the spring plate 8 is moved by the inner surface of the holder 3.
Of the rubber plate 9 is elastically deformed by pressing (narrowing) the convex portion 8a of
The mounting base 5 of the tilling claw is pressed via the to fix the holder in the holder 3, and the tilling work is continued in this state. Further, the side surface of the mounting base 5 and the inner surface of the spring plate 8 are elastically joined by the rubber plate 9 which is compressed by the elastic deformation of the spring plate 8 to firmly and stably fix the mounting base 5 and also to perform the vibration damping action. ..
Further, when removing the plowing pawl from the holder 3, the plowing pawl is hit with a hammer so that the mounting base 5 is returned straight as shown by the solid line in FIG. 3 and FIG. 4 (a), and the pin is inserted into the pin insertion hole 6 By pulling it out from the holder,
It can be removed and replaced with a new tillage claw.

In the third embodiment of the present invention shown in FIGS. 5 to 7, the inner surface of the holder 3 is a tapered load that receives the radial load applied to the mounting base portion 5 of the rotated plowing pawl by surface contact. The receiving portions 10 and 10 are formed. The load receiving portion 10 may be formed integrally with the holder 3, or may be formed separately and fixed by screws or the like to be replaceable. Further, similarly to the first and second embodiments, a cross-sectional cross section is provided between the side surface of the mounting base 5 of the tilling pawl in the holder 3 and the inner surface of the holder 3 so as to cover the side surface of the mounting base 5 of the tilling pawl. The letter-shaped spring plate 11 is fitted, but the spring plate 1
The inner surface shapes of 1 and holder 3 are slightly different from those of the second embodiment. That is, as shown in FIG. 6, on the inner surfaces of the spring plate 11 and the holder 3, arcuate convex portions 11 a are formed on the spring plate 11, and on the inner surface of the holder 3, arcuate concave portions 3 d are respectively formed. Further, an arcuate concave portion 3d is formed on the opposite side of the inner surface of the holder 3 so that the mounting base 5 of the tilling claw and the spring plate 11 can be fitted and inserted.

A pin insertion hole 12 is formed in the holder 3, the mounting base 5 of the tilling claw, and the spring plate 11. In the holder 3, a pin head insertion hole 12a and a pin shaft insertion hole 12b are formed. The mounting base 5 of the tilling claw and the spring plate 11 are provided with an insertion hole slightly thicker than the pin shaft insertion hole 12b. As shown in FIG. 7, the pin 13 inserted into the pin insertion hole 12 has a head portion 13a, a thick shaft portion 13b, a stopper portion 13c, and a thin shaft portion 13d. Further, although not shown, the holder 3 of the thin shaft portion 13d
The portion projecting outward from is provided with a retaining means.

In the apparatus for mounting a tilling claw of the third embodiment having such a structure, the spring plate 11 is fitted on the side surface of the mounting base portion 5 of the tilling claw, and in this state, in the space 4 of the holder, as shown in FIG.
6 and the straight line as shown in FIG. 6A, the pin 13 is inserted into the pin insertion hole 12 as shown in FIG. Then, when the cultivating shaft 2 rotates in the direction of the arrow and the cultivating work is performed by the cultivating claw, the mounting base 5 of the cultivating claw rotates by α degrees around the pin 13 due to the cultivating resistance, and the imaginary line in FIG. As shown in FIG. 6 (b), the spring plate 11 fitted to the mounting base 5 of the tilling claw is in surface contact with the load receiving portions 10, 10 provided in the holder 3 at the contact surfaces 10a, 10a. Be stopped.

At this time, the spring plate 1 is moved by the inner surface of the holder 3.
The convex portion 11a of No. 1 is pressed (narrow pressure) and elastically deformed, and the side portion of the mounting base 5 of the tilling claw is pushed to be fixed in the holder 3, and the tilling work is continued in this state. Further, since the side surface of the mounting base 5 in the rotation direction is in contact with the tapered surfaces of the load receiving portions 10, 10 through the spring plate 11 in a large area,
Damage to the plowing nail and damage to the spring plate 11 are prevented. Furthermore, when removing the tiller from the holder 3, the tiller is hit with a hammer to return the mounting base 5 straight as shown by the solid line in FIG. 5 and FIG. 6A, and the pin 13 is inserted into the pin insertion hole. By removing from the holder 12, the tilling claw can be removed from the holder 3 and replaced with a new tilling claw.

[0018]

As described above, according to the tilling claw attaching device of the present invention, the following effects can be obtained. On the side surface of the mounting base of the tilling claw that is inserted into the holder,
When the mounting base of the plowing pawl rotates back and forth around the pin, it is elastically deformed by being pressed by the inner surface of the holder, and an elastic body that press-fixes the mounting base of the plowing pawl is fitted. The base of the attachment does not rattle, and damage to the plowing claw is prevented. Further, the impact load applied to the tilling claw is absorbed by the elastic body, and the durability of the tilling claw and the holder is improved. In addition, existing tillage claws can be used without tightening them with bolts and nuts. Further, the plowing claws can be easily replaced, and it is also suitable to use the forward and reverse rotating claws. Since another elastic body is inserted between the mounting base and the elastic body, when the mounting base rotates back and forth around the pin, it is more firmly fixed to the holder. Also,
The impact and vibration from the plowing nails are absorbed, and the durability is improved. Since the holder is formed with the load receiving portion for receiving the radial load applied to the mounting base of the rotated plow tab by surface contact, the impact load applied to the plow tab is absorbed in a wide area and the holder and the plow tab are not damaged.

[Brief description of drawings]

FIG. 1 is a cross-sectional side view of a holder according to a first embodiment of the present invention.

FIG. 2A is an end view of the holder before the tilling claw is rotated, and FIG. 2B is an end view of the holder after the tilling claw is rotated.

FIG. 3 is a sectional side view of a holder according to a second embodiment.

FIG. 4 (a) is an end view of the holder before the tilling claw is rotated, and FIG. 4 (b) is an end view of the holder after the tilling claw is rotated.

FIG. 5 is a side view in which a holder of a third embodiment is sectioned.

FIG. 6A is an end view of the holder before the tilling claw is rotated, and FIG. 6B is an end view of the holder after the tilling claw is rotated.

FIG. 7 is a vertical sectional view of a holder according to a third embodiment.

[Explanation of symbols]

 1 Cultivating Claw Attachment Device 2 Cultivating Shaft 3 Holder 4 Holder Space 5 Cultivating Claw Mounting Base 6,12 Pin Insertion Hole 7,8,11 Spring Plate 9 Rubber Plate 10 Load Receiver 10a Abutment Surface 13 Pin

Claims (3)

[Claims] 1. A mounting base of a plowing pawl is fitted into a holder fixed to a tilling shaft, and a pin is inserted into a pin insertion hole formed in the mounting base of the holder and the plowing pawl to remove the mounting base of the plowing pawl. In the tiller mounting device which is used after being stopped, on the side surface of the mounting base of the tiller fitted and inserted in the holder,
When the mounting base of the plowing pawl is rotated back and forth around the pin, it is elastically deformed by being pressed by the inner surface of the holder, and an elastic body for pressing and fixing the mounting base of the plowing pawl is fitted. Mounting device. 2. The tillage claw attaching device according to claim 1, further comprising another elastic body interposed between the mounting base and the elastic body. 3. The tiller attachment device according to claim 1, wherein the holder is formed with a load receiving portion for receiving a radial load applied to the mounting base portion of the rotated tiller by surface contact.