JPH0626083Y2 - Tillage equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is mounted on a cylindrical bracket arranged on a pawl shaft capable of rotating in the forward and reverse directions by using bolts in a swingable state within a certain range. The present invention relates to a tilling device equipped with the forward / reverse tilling claw.

[Conventional technology]

For this type of forward / reverse plowing claw, insert the claw base of the plowing claw into the bracket with a bottomed square tube with a margin in the forward / reverse rotation direction, and further extend the claw shaft over the bracket and the claw base. By bolting in the core direction, the plowing claw can be swung in the forward and reverse rotation directions with the bolt as a fulcrum.
By the way, the reason why the plowing claws can be swung is that when the plowing claws bite into the ground, the plunging claws are swung to the upper side in the direction of rotation by the reaction force of the soil to make the biting angle shallower and to suppress the driving resistance. .

In addition, it is desirable that such a tilling claw is pivotally connected to the bracket so that an appropriate friction acts on the claw base so as not to freely swing in the air where there is no resistance from soil,
As a means for this, a structure in which a friction member such as a disc spring is interposed in the pivotal support portion and tightened with a bolt is employed (see, for example, Japanese Utility Model Laid-Open No. 60-31202).

[Problems to be solved by the invention]

However, in the above conventional structure, the disc spring is dropped and lost when the pawl is replaced.

The present invention has been made in view of such an actual situation, and an object thereof is to eliminate the above-mentioned drawbacks by effectively utilizing the reinforcing structure of the plowing claw.

[Means for solving problems]

A characteristic configuration of the present invention for achieving the above-mentioned object is that an elastically deformable reinforcing plate having a shape in which a tip end side in a nail inserting direction is separated from a side surface of a claw base is attached to a side surface of the claw base. A large-diameter hole is formed on one side surface of the bracket to allow the head of the bolt penetrating the bracket to enter, and the claw base is moved inside the bracket as the head of the bolt is pulled toward the reinforcing plate. It is configured so that it is pressed against the side surface and fixed.

[Action]

With the above structure, the present invention operates as follows. That is,
When the bracket and the claw base are tightened with bolts, the reinforcing plate is elastically deformed to the side surface side of the claw base. And this elastic force acts in the axial direction of the bolt, and the base of the claw and the bracket,
Alternatively, it acts as a pressure contact force between the reinforcing plate and the bracket to increase the frictional force.

[Effect of device]

As a result, it is possible to give a frictional resistance imparting function to the tilling claw itself by simply modifying the mounting structure of the reinforcing plate, and it is possible to prevent loss of friction parts such as disc springs when the claw is attached or detached.
Improved handling performance. Further, since the elastically deformable reinforcing plate is attached to the tip end side of the plate away from the side surface of the claw base, the elastically deformable tip end is used for insertion into the bracket. The rear end side has a structure that is easy to perform and is less likely to be elastically deformed by being fixed to the claw base portion, and can be reliably fixed to the bracket.

〔Example〕

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

FIG. 4 shows a cultivator to which the forward-reverse bidirectional cultivating claw of the present invention is applied. (1) is a cultivator main body, which has an engine (2) mounted on the front part and a transmission (3). Drive the wheels (4) and also the rotary tiller (5) mounted at the rear. The rotary tiller (5)
Is configured so that a plurality of forward / reverse cultivating claws (6) ... Can be swingably attached to rotary shafts (7) corresponding to the claw shafts via mounting brackets (8). The rotary shaft (7) is configured to be rotated forward and backward by lever shift operation.

As shown in FIGS. 1 and 2, the plowing claw (6) has a leaf shape when viewed from the axial direction, and a curved edge (9a) at the outer peripheral edge.
It is composed of a blade body (9) formed with and a claw base (10) for attaching the blade body (9) to the bracket (8).

The claw base (10) is plate-shaped, and a reinforcing plate (11) composed of a leaf spring is cantilevered and tacked in a state where a slight gap is formed between the claw base (10) and the side surface thereof. Further, a hole (12) for a bolt insertion hole is formed between the reinforcing plate (11) and the claw base (10).

The attachment of the tiller claw (6) to the bracket (8) is performed by inserting the claw base (10) of the tiller claw (6) together with the reinforcing plate (11) into the bracket (8) as shown in FIG. Bolts (13) across the holes (8a), (8b) drilled at two locations outside of (8) and the holes (12) for bolts of the claw base (10) and leaf spring (11). It is done by inserting and tightening with nuts (14).
Of the holes (8a) and (8b) formed in the bracket (8), the hole (8b) formed on the head side of the bolt (13) has a larger diameter than the hole (8a) on the other side. It is formed in a hole and has a hexagonal shape to prevent the bolt (13) from rotating.

In the tilling claw (6) thus connected, the claw base (10) is elastically pressure-bonded to the inner surface of the bracket (8) by elastically deforming the reinforcing plate (11) appropriately, and a friction force is generated. Friction resistance is given to the rotation.

The reinforcing plate (11) may be a simple steel plate.

Further, as shown in FIG. 5, the side wall of the bracket (8) may be bent in an arc shape.

It should be noted that although a number is given in the section of the scope of claims for utility model for convenience of comparison with the drawings, the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

1 is an exploded perspective view, FIG. 2 is a side view, FIG. 3 is a vertical sectional front view, and FIG. 4 is an overall side view of a cultivator according to the present invention. FIG. 5 is a view showing a bracket of another embodiment. (5) …… Claw shaft, (6) …… Forward / reverse tilling claw, (8) …… Bracket, (8b) …… Large diameter hole, (10) …… Claw base, (13) …… Bolt.

Claims (1)

[Scope of utility model registration request] 1. A forward / reverse rotation attached to a tubular bracket (8) disposed on a pawl shaft (5) capable of normal and reverse rotation by a bolt (13) in a swingable state within a certain range. A cultivating device equipped with a cultivating claw (6), wherein an elastically deformable reinforcing plate having a shape in which a tip end side in the claw insertion direction is separated from a side surface of the claw base (10) on a side surface of the claw base (10). With (11) attached,
On one side surface of the bracket (8), a large diameter hole (8b) that allows the head of the bolt (13) penetrating the bracket (8) to enter is formed, and the head of the bolt (13) is The claw base (10) is attached to the bracket (8) along with the pulling toward the reinforcing plate (11).
A tilling device that is configured to press and fix to the inner surface.