JPH01304802A - Apparatus for attaching tillage tine - Google Patents

Abstract

PURPOSE:To prevent the transverse shaking of a tillage tine by engaging an engaging groove disposed on the side surface of a tillage tine with an engaging projected portion of a cover plate to be inserted into an inserting groove formed on one of the left and right sides of a bracket from the forward direction of rotation. CONSTITUTION:When a tapered cover plate 14 is inserted into an inserting groove 12 from the forward direction of rotation, the cover plate 14 is inserted into the inserting groove 12 in a wedge-like state and received without projecting from the side surface of the bracket 4. An engaging groove 16 having an inclined groove bottom 16a is formed on the side surface of a base portion 5a and the engaging projected portion 15 of the cover plate 14 is engaged with the engaging groove 16 by the insertion of the cover plate 14. The engagement of the engaging projected portion 15 with the engaging groove 16 permits the fixing of the tillage tine 5 toward the diameter of a tine shaft and the contact of the inclined surface 15a with the inclined groove bottom 16a.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a tilling claw attachment device for a rotary tiller or the like.

(Prior art) As a tilling claw attachment device, a hollow square bracket 1 has a claw shaft having front and rear walls in the direction of rotation of the claw shaft and left and right side walls in the direction of the center axis of the claw shaft.
-, insert the base of the tilling claw into this bracket, pass a bolt through the base of the tilling claw and the bracket in the direction of the claw shaft axis, and then bolt the tilling claw against the bracket.
As shown in Fig. 10 (publication of Utility Model Publication No. 46-14725), bottle holes 21 and 22 are drilled in the base 5a of the bracket 4'' and the υ1 claw 5. A bottle 23 that is fitted into the pin holes 21 and 22 is provided protrudingly on the side plate 25 of the fixing metal fitting 24, and a 3-shaped braget clamping body 26 is provided at the end of the side plate 25 of the fixing metal fitting 24. Then, insert the pin 23 of the fixing metal fitting 24 into the bracket, pass it through the bottle holes 21 and 22 from the outside of l"l', and abut the side 4 side 25 on the solenoid pin 4", and then attach this fixing metal fitting 24 to the pin. 23 as the center to hold the clamping body 26.

The bracket 4 is fitted into the bracket 4 to make it immovable.
There is one in which tilling claws 5 are attached to the '.

(Problems to be Solved by the Invention) In the former technique, the structure is simple and sufficient force can be obtained for attaching the plowing claws, but since it requires tightening and loosening of the plowing claws, it takes time to attach and detach the tilling claws, and Since the bolt heads and nuts protrude outward from the left and right side walls of the bracket and come into contact with the soil, they may wear out or break.

Further, in the latter technique, although some of the problems of the former technique can be solved, the pressing action of the base portion 5a by the holding body 26 cannot be maintained very much. In other words, the post-hitting technique is bracket 4”
An opening 27 is formed in one side wall, and the clamping recess 26a of the clamping body 26 is formed in a slightly tapered shape, so that the portion that enters the opening 27 of the clamping body 26 and comes into contact with the base 5a and the bracket 4
The base 5a is pressed against the bracket 4 by the part that contacts the other side wall to prevent the tilling claws from swinging laterally. ],
If a large load is applied to the tilling claws, they will elastically deform and escape, making it difficult to reliably prevent lateral vibration. Furthermore, even if the clamping recess 26a of the clamping body 26 is made tapered, the base 5a that comes into contact with it does not have a tapered surface, so the clamping body 26 is easily deformed because there is only a line contact and no surface contact. In order to prevent the clamping body 26 from spreading, it is difficult to provide a restraining metal on the bracket, and the tapered clamping body 2
6 and the restraints that prevent the ends of the clamping body 26 from spreading, it is difficult to maintain the prevention of horizontal vibration of the tilling claws for a long period of time, and furthermore, these restraints protrude outward from the outer surface of the bracket 4. However, there remains the problem that it is easily worn out and damaged.

In the present invention, an example of the bracket 4 is formed with an insertion groove 12 into which the lid body 14 is inserted, and the lid body 14 is formed with an engaging protrusion 15 having an inclined surface 15.11. 15a and engages with the engagement protrusion 15
This solves the problems of the prior art by forming a structure in which the tilling claws 5 can be removed and prevented from swinging by simply inserting the lid 14 into the insertion groove 12. It is an object of the present invention to provide a tilling claw attachment device that allows the tilling claws to be mounted.

(Means for solving the problem) The specific means for solving the problem in the present invention is as follows:
The rotation direction of the nail shaft A and the front and rear walls 4F, 4R and the axis direction of the nail shaft B
Fix the hollow bracket 4 having left and right side walls 4L and 4S, insert the base 5a of the tilling claw 5 into the bracket 4,
In this tilling claw attachment device in which the tilling claw 5 is removably attached to the bracket 4, insertion grooves 12 are formed on the left and right sides of the bracket 4, for example, so as to taper toward the rotation rear side and expose the side surfaces of the tilling claw 5. A lid 14 is provided in this insertion groove 12 from the front side of the rotation to prevent it from coming off in the front and back of the rotation and on the right and left sides. Slanted surface 15a gradually approaches tilling claw 5
An engaging protrusion 15 is formed on the side surface of the tilling claw 5, and a retaining groove 16 is formed on the side surface of the tilling claw 5, which has an inclined groove bottom 16a-3 that comes into contact with the inclined surface 15a and is engaged with the engaging protrusion 15. This is what is being done.

(Function) When the base portion 5a of the tilling claw 5 is inserted into the bracket 4, the side surface of the base portion 5a is exposed from the insertion groove 12 on one side.

When the tapered lid I4 is inserted into this insertion groove 12 from the front side of the rotation, the lid 14 is wedge-shaped and fits in without protruding from the side surface of the bracket 4, and is prevented from coming off in the front and back of the rotation and to the left and right sides. . A retaining groove 16 having an inclined groove bottom 16a is formed on the exposed side surface of the base 5a, and when the lid 14 is inserted, the engaging protrusion 1 of the lid 14 is inserted into the engaging groove 16.
5 becomes engaged. By engaging with the engaging groove 16, the engaging protrusion 15 fixes the tilling claw 5 in the radial direction of the claw axis, and its inclined surface 15a abuts against the inclined groove bottom 16a. Inclined surface 15a
Since it gradually approaches the tilling claw 5 toward the front side of rotation,
When rotating from the front side to the rear side, the base portion 5a is pressed against the other side wall of the bracket.

During tillage work, when the lid body 14 receives the soil, it is pushed into the insertion groove 12 as if driving a wedge, and the engaging protrusion 15 is pushed into the engaging groove 16 of the base 5a as if driving a wedge, and the lid body 14 and the prevention of horizontal vibration of the tilling claws 5 are further strengthened.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 9, reference numeral 1 denotes a rotor 11 attached to the tractor via a three-point link mechanism, and a claw shaft 3 is rotatably supported on the rotor machine frame 2 around a horizontal axis, and a bracket 4 is attached to the claw shaft 3. A large number of tilling claws 5 are attached through the
A tilling section 6 is formed, and this tilling section 6 is arranged above and rr.
1 and the rear is covered with a tillage cover 7.

Although the tiller claw 5 is shown in a downcant working state in which the machete claw is rotated in the direction of the arrow, it can also be installed in an amplifier cutting working state in which the claw shaft 3 is reversed.

8 represents Reiki, and 9 represents the gauge wheel.

In the first embodiment shown in FIGS. 1 to 4, the bracket 4 is formed by combining two large and small U-shaped members to form a hollow rectangular box shape, which is welded to the outer peripheral surface of the claw shaft 3. Claw shaft 3
After 11iT in the rotational direction, the front and rear walls 4F, 4R are formed, and the left and right side walls 417, 4 are formed on the left and right in the axial direction B of the claw shaft 3.
S is formed, and the end portion is open, and the base portion 5a of the tilling claw 5 is inserted in a removable manner.

1111 An insertion groove 12 is formed in the left and right side walls 4L of the bracket 4 at a midway position in the radial direction C of the claw shaft. This insertion groove 12 is open inside the bracket 4, the upper and lower rails 130 and 130 are dovetail grooves (square grooves may also be used), and the lower rail 13D is perpendicular to the radial direction C of the claw shaft 3. However, the upper rail 13U is inclined at an angle α with respect to the lower rail 130, and the distance between the rails 13U and 13D becomes narrower from the front side of the rotation of the claw axis to the rear side. One or both of the upper and lower rails 130.13D are arranged in the claw axis radial direction C.
It is sufficient that the insertion grooves 12 are formed so as to approach each other on the rear side from a posture perpendicular to the rotation direction.In short, it is sufficient that the insertion grooves 12 are tapered toward the rotation rear side.

A lid 14 is inserted into and removed from the rotational front side of the insertion groove 12. This lid body 14 is formed of a spring plate or an iron plate, etc., and its upper and lower edges are shaped to be compatible with the upper and lower rails 13U and 1311, and when inserted, it can be inserted into the rear side of the rotation direction A and the left and right sides of the rotation direction. was prevented from leaving the
Further, it is driven in by a wedge effect and is prevented from coming off toward the front side of rotation. When the lid body I4 is inserted into the insertion groove 12, its side surface becomes the side surface of the bracket 4 and the road surface, and the base portion 5a of the tilling claw 5 that was visible from the insertion groove 12 is hidden.

An engaging protrusion 15 is formed on the surface of the lid 14 facing the tilling claws 5. The engaging protrusion 15 is formed integrally with the lid 14 or formed separately and fixed thereto, and becomes gradually thinner from the front side of rotation to the rear side.

In other words, the surfaces of the five tilling claws of the engagement protrusion 15 are inclined surfaces 15a that are inclined at an angle β so as to gradually approach the tilling claws 5 from the rotational rear side to the front side.

On the other hand, a retaining groove 16 is formed on the side surface of the base portion 5a of the tilling claw 5 in correspondence with the engaging protrusion 15 to be engaged therewith. The engaging protrusion 15 engages with the engaging groove 16 to prevent the tilling claw 5 from moving in the radial direction C of the claw axis. Further, the groove bottom 16a of the engagement groove 16 is an inclined groove bottom that becomes shallower from the front side to the rear side of rotation, and can come into surface contact with the inclined surface 15a of the engagement protrusion 15. When the engaging protrusion 15 is inserted into the engaging groove 16, it is pressed against the rear part 5a, and the wedge effect of the inclined surface 15a and the inclined groove bottom 16a presses and clamps the base part 5a against the inner surface of the side wall 4S of the bracket 4. , to prevent horizontal vibration of the tilling claws 5.

In the embodiment described above, a groove through which the engagement protrusion 15 can pass is not formed in the groove bottom of the insertion groove 12 on the front wall 4F side.

As in the second embodiment described later, a protrusion passing groove may be formed, but the insertion groove 12 is made deeper and the inclined groove bottom 1 is made deeper than the groove bottom.
If the cover 6a is formed so as to be located on the lid 14 side, or if the lid 14 is formed of a spring plate, there is no need to forcefully form the protrusion passage groove.

In the second embodiment shown in FIGS. 5-8, the bracket 4 has one side wall 41. A pair of rail bodies 17U, 17 on the outer surface of
D is fixed, and from the front wall 4F to the rear wall 41? The insertion groove 12 is formed by these, and the cutout becomes a protrusion passage groove 18, and the base 5d is exposed by this protrusion passage groove 18.

The base 5a of the tilling claw 5 is connected to the inclined groove bottom 1 as in the first embodiment.
6a is formed, and a protrusion passage groove 18 is formed.
The engaging protrusion 15 of the lid body 14 that enters is engaged.

In this second embodiment, since the side opening of the bracket 4 is small, the bracket strength is high, the insertion: M12 is not limited to the wall thickness of the bracket 4, and the rail body 1
Since the wall thickness of the cover T4 can be arbitrarily selected, the supporting strength of the lid T4 can be set high.

In both of the above embodiments, the engaging protrusion 15 may be formed along the entire length of the lid 14, the tilling claws 5 may be conventionally threaded claws, and a bottle hole may be formed in the base portion 5a. For example, it can be used in combination with conventional techniques. Further, the lid body 14 is prevented from being removed from the insertion groove 12 by the pressing force on the base 5 by the engagement protrusion 15.
(2) It is preferable to generate it first, and if the lid body 14 is made of a spring plate, it can be bent to some extent, so if it is driven forcefully, the base portion 5FU can be suppressed more reliably.

(Effects of the Invention) According to the present invention described in detail above, the engaging protrusion 15 of the lid body 14
By engaging and disengaging the tilling claws 5 with the engagement grooves I6, the tilling claws 5 can be attached and detached from the bracket 4, making the attachment and detachment work extremely easy.
The slope 15a of the engagement protrusion 15 is connected to the engagement groove 16.
Since the seed part 5a is pressed against the side wall of the bracket by making surface contact with the inclined groove bottom 16a, the pressing force is strong and the lateral vibration of the tilling claws 5 can be strongly prevented. Since the bracket 4 does not move laterally, the lid body 14 does not undergo elastic deformation, and the prevention of lateral vibration can be ensured and maintained. There is no need for the bracket 4 to protrude outward from the side surface of the bracket 4 in this state, and therefore there is no part that comes into contact with soil and is worn out or damaged as in the prior art, and durability can be improved.

[Brief explanation of the drawing]

1 to 4 show a first embodiment of the present invention.
The figure is an exploded perspective view, Figure 2 is a side view, and Figure 3 is the l of Figure 2.
ll-1 line sectional view, Figure 4 is a sectional view taken along IV-■ line in Figure 2, Figures 5 to 8 show the second embodiment, Figure 5 is an exploded perspective view, and Figure 6 is a side view. 7 is a sectional view taken along the line ■-■ in FIG. 6, FIG. 8 is a sectional view taken along the line ■-■ in FIG. 6, FIG. 9 is a side view showing the state of use, and FIG. It is an exploded perspective view. 3 is the claw shaft, 4 is the bracket, 5 is the tiller claw, 12 is the insert d
4. Lid body to 14, engagement protrusion to 15, inclined surface to 15a, 1
6 is the engagement groove, 16a is the inclined groove bottom, A is the rotation direction, B is the axial direction, and C is the radial direction.

Claims (1)

[Claims] (1) A hollow bracket 4 having front and rear walls 4F, 4R in the rotation direction A of the nail shaft and left and right side walls 4L, 4S in the direction B of the nail shaft axis is fixed to the nail shaft 3, and the base 5 of the tilling nail 5 is placed inside this bracket 4.
In the tilling claw attachment device in which the tilling claw 5 is removably attached to the bracket 4 by inserting the tilling claw 5 into the bracket 4, there is provided an insert on one left and right side of the bracket 4 that tapers toward the rotation rear side and exposes the side surface of the tilling claw 5. A groove 12 is formed, and a lid body 14 is provided in this insertion groove 12 and is inserted from the front side of rotation to prevent it from coming off in the front and back of rotation and on the left and right sides. An engaging protrusion 15 having an inclined surface 15a that gradually approaches the tilling claw 5 toward the front side of the rotation is formed, and the side surface of the tilling claw 5 has an inclined groove bottom 16a that comes into contact with the inclined surface 15a and is engaged. A tilling claw attachment device characterized in that an engagement groove 16 that engages with a protrusion 15 is formed.