JPH0416962Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention relates to a tilling claw that is removably attached to the tilling shaft of a rotary tilling device, and more specifically, it is lightweight and has high installation strength, and in particular, requires less man-hours and is inexpensive. Regarding the tilling claws that can be manufactured for both forward and reverse use.

(b) Technical background and problems It is desirable that tilling claws have a specified mounting strength, and are lightweight and inexpensive if possible. However,
In particular, tilling claws that can be used in both forward and reverse rotations are usually made of flat steel plates, and when attaching the flat part of the claws to the tilling shaft, great mounting strength is required. Therefore, for example, a mounting part that matches the holder provided on the tilling shaft side is formed and this mounting part is welded to the tilling claw, or a plurality of materials are combined.

However, in the case of such conventional welded structure or combination structure tilling claws that can be used in both forward and reverse directions,
Cultivating claws must be discarded as their blades wear out, and at that time, especially in the former case, the attachment part welded to the claw must also be discarded, increasing man-hours and reducing the number of materials used. This leads to an increase in
There was a problem that it could not be manufactured cheaply.

(c) Purpose of the invention This invention was devised in view of the problems of the prior art described above, and its purpose is to manufacture a product that has sufficient mounting strength, requires less man-hours, is lightweight, and is inexpensive. The purpose of the present invention is to provide a tilling claw that can be used in both forward and reverse directions.

(d) Structure of the invention In order to achieve the above object, this invention has a tilling claw mounting structure in which the tilling claw is attached to the holder of the tilling shaft, in which the tilling claw is formed from a flat steel plate, and the tilling claw is formed from a flat steel plate with an approximately central upper portion of the flat steel plate. A wedge-shaped portion having a concave or convex cross section is formed in the wedge-shaped portion, a bolt through hole is formed approximately in the center of the wedge-shaped portion, one end of the member is fitted into the wedge-shaped portion, and the other end is attached to the tilling shaft. The tiller is formed to fit a holder, and the tiller claw is attached to the holder of the tiller shaft via the member.

(E) Embodiments Hereinafter, embodiments of this invention will be described in detail based on the drawings.

An embodiment of this invention is shown in FIGS. 1 to 3.
Figure 1 is a plan view, Figure 2 is a front view, Figure 3 is a
FIG. 3 is a right side view of the figure.

As usual, the tilling claw 1, which can be used in both forward and reverse directions, is formed of a flat steel plate, has vertical blade parts 3, 3 on the front and rear edges in the rotation direction, and is press-formed approximately in the center to have a wedge shape in the vertical direction and a concave cross section. It has a mounting groove 5. A bolt through hole 7 for bolting to a member to be described later is provided on the center line of the mounting groove 5, and reinforcing ribs 9, 9 are provided at appropriate locations on the outer periphery of the mounting groove 5.

In the above embodiment, the mounting groove 5 is formed so as to be concave downward in FIG. 1 (towards the front in FIG. 2); ) Even if it is formed in a concave shape, the function and effect are the same.

The tilling claws 1 are formed by press-molding a thin plate material. At this time, the mounting groove 5, the bolt through hole 7, and the reinforcing ribs 9, 9 can be press-formed at the same time.

A method of attaching the tilling claw 1 to the tilling shaft side holder is shown in FIGS. 4 to 6.

4 and 5, the lower end of a flat member 11 is formed into a wedge shape so as to fit into the concave surface of the mounting groove 5 of the tilling claw 1, and the two are overlapped and fastened and fixed with bolts 13 and nuts 15. , the upper end (not shown) of the member 11 is attached to a holder on the claw shaft side.

With the above configuration, the mounting groove 5 is configured to embrace the member 11, so that both can be firmly fixed. In addition, during tilling work, the mounting groove 5 bites into the member 11 due to the soil resistance that the tiller claw 1 receives, which is a so-called wedge action, which firmly fixes the member 11 and prevents the risk of weeds and foreign matter being wrapped around the member 11 (wrapping phenomenon). ) will decrease. Furthermore, even if the mounting groove 5 or the member 11 wears out, they are fixed by the wedge action of the two, so no wobbling occurs.

According to the above embodiment, the tilling claw 1 must be discarded as the vertical blade portion 3 wears out, but at that time the member 11 is removed from the tilling claw 1 and replaced again with another new tilling claw. Since it can be used at any time, materials are not wasted and resources are saved.

FIG. 6 shows the wedge-shaped concave portion 19 of the member 17 having a wedge-shaped concave groove aligned with the back surface (convex portion) of the wedge-shaped concave portion of the mounting groove portion 5 of the tilling claw 1, and the bolt 13 inserted through the bolt through hole 7 to the member 17 side. A nut 15 is placed on the concave side of the tilling claw 1, and both are fastened and fixed.

With the above configuration, the back surface of the mounting groove 5 of the tilling claw 1 is fitted into the wedge-shaped recess 19 on the member 17 side, and both are firmly fixed, and during tilling work, the wedge action works to further firmly fix them. Of course. Further, since the nut 15 is configured to be housed in the recessed portion of the attachment groove 5 of the tilling claw 1, the phenomenon of wrapping during tilling work can be minimized.

The embodiment shown in FIG. 6 also exhibits the same resource saving effect as the previous embodiment.

Note that the wedge-shaped portion is not limited to being formed by pressing, but may also be formed by casting or the like.

(f) Effects of the device As explained above, according to this device, the wedge-shaped portion makes the attachment of the tilling claws strong even if it receives a reaction force from the tilled soil, thereby preventing the occurrence of wobbling. Therefore, the occurrence of wear can be suppressed.

In addition, it is not necessary to discard the attachment member when disposing of the tiller claws, which saves resources.

Note that a thin plate material can be used as the raw material, and the weight can be reduced accordingly, and press molding can be easily performed.

[Brief explanation of drawings]

The drawings show one embodiment of this invention; Fig. 1 is a plan view of the tiller, Fig. 2 is a front view thereof, Fig. 3 is a right side view of Fig. 2, and Figs. 4 and 5. Figures 1 and 6 are explanatory diagrams showing a method for attaching the tilling claws shown in Figures 1 to 3 to the tilling shaft side holder. Explanation of the symbols representing the main parts of the drawing, 1...
Cultivating claw, 5...Mounting groove.

Claims (1)

[Scope of utility model registration request] In the tilling claw mounting structure for attaching the tilling claw to the holder of the tilling shaft, the tilling claw is formed of a flat steel plate,
A wedge-shaped portion having a concave or convex cross section is formed at approximately the upper center of the flat steel plate, a bolt through hole is formed approximately at the center of the wedge-shaped portion, and one end of the member is adapted to fit into the wedge-shaped portion, A tilling claw attachment structure, characterized in that the other end is formed to fit the holder of the tilling shaft, and the tilling claw is attached to the holder of the tilling shaft via the member.