JPH0432008Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a tiller claw attached to a tiller shaft.

The purpose of this invention is to provide a tilling claw that can improve the mounting strength, can be lightweight, and has excellent soil turning efficiency.

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

First, to explain the configuration, as shown in Figure 1,
The claw support plate 2 disposed around the circumference of the tilling shaft 1 is formed as follows. That is, this claw support plate 2 is formed of a disc body with a diameter that is approximately the same width as the width of the tilling claws 3, which will be described later, and a shaft hole 21 into which the tilling shaft 1 can be fitted is provided in the center thereof. has been done. Bolt holes 22 having the same diameter are penetrated at a plurality of locations on the same diameter line on the disk surface of the claw support plate 2. The above claw support plate 2 is fitted concentrically to the shaft portion of the tilling shaft 1 at various angles, and is fixedly provided by means such as welding.

Next, the tilling claws 3 attached to the above-mentioned claw support plate 2 are formed as follows. In other words, this tilling claw 3
is formed of a single plate in a symmetrical manner with the axis perpendicular line B set on the extension of the perpendicular line connecting one end of the outer periphery between the rotation center A of the tilling shaft 1 and the bolt hole 22 of the claw support plate 2 as the center line. ing. The supported portion 31 corresponding to the upper part of the tilling claw 3 is formed like the left and right sides of a U-shape having the same width as the claw support plate 2 and with a part of the middle band removed. Bolt holes 32 concentric with the bolt holes 22 of the pawl support plate 2 are provided through the plate-shaped left and right surfaces of the pair of left and right mounting portions 31, respectively. Further, directly below the supported portion 31, a tongue-like blade portion 33 whose upper portion has the same width as the mounting portion 31 is connected with the same plate thickness around the axis perpendicular line B. The upper half of the blade portion 33 is vertical, and the lower half is curved in an arc shape in one direction. The front and rear edges of the blade section 33 due to the vertical surface of the upper half and the bent surface of the lower half, that is, the front and rear edges with respect to the rotation direction of the tilling shaft 1, have vertical surfaces that can be commonly used for forward and reverse rotation. The blades 34, 35 are formed in such a manner that they form the outer periphery of the tongue-like body. That is, one of the vertical blades 34 is formed as a connected body of a straight line and a gradually receding circular arc with respect to the positive rotation work direction S of the tilling shaft 1. The other vertical blade 35 is also formed as a connected body of a straight line and a gradually receding circular arc with respect to the reverse rotation working direction T of the tilling shaft 1. Note that the tip of this blade portion 33 is
As shown by the imaginary line in the figure, its cross section is symmetrical with the axis perpendicular B toward the vertical blades 34 and 35 on each side, and is bent at an obtuse angle within the rotational plane of the tilling shaft 1. It is formed in the shape of a refractive surface.

R in FIG. 1 is the radius of rotation from the rotation center A of the tilling shaft 1 to the tip of the tilling shaft 1 when the tilling claws 3 rotate forward and backward. Therefore, the tips of the tilling claws 3 are configured so that they can perform cultivation work by forward and reverse rotation in the forward rotation work direction S or in the opposite reverse rotation work direction T under the above-mentioned rotation radius R. There is. Note that 4 is a bolt that is inserted into the bolt hole 22 of the claw support plate 2 and the bolt hole 32 of the tilling claw 3.

Next, the action will be explained.

With the above configuration, the tilling shaft 1 is arranged between the mounting parts 31, and each bolt hole 22 of the claw support plate 2
By aligning the bolt holes 32 of the tilling claws 3 with the bolt holes 22 and 32, and inserting the bolts 4 into both bolt holes 22 and 32, the tilling claws 3 are attached to the claw support plate 2 by tightening nuts (not shown).
When the tilling shaft 1 is rotated, for example, in the positive rotation work direction S, the vertical blade 34 at the front edge of the tilling claw 3 in the rotation direction becomes a cutting blade. , is formed as a connected body of a straight line and a receding circular arc with respect to the positive rotation working direction S of the tilling shaft 1, and cutting resistance can be extremely reduced, and the claw support plate 2 and the tilling claw 3 are Since the strength of the tilling claws 3 is increased by integrating the bolts, the tilling work can be carried out smoothly, easily and efficiently.

Next, when the tilling shaft 1 is rotated in the reverse rotation working direction T, the other vertical blade 35 of the tilling claw 3 becomes a cutting blade; It is formed as a connected body of a straight line and a receding circular arc, and the cutting resistance can be extremely reduced, and the strength of the tilling claws 3 is increased by the bolting described above even in this rotation direction. , plowing work can be carried out smoothly, easily and efficiently.

When working in this way, the reaction force that the tilling claws 3 receive from the soil acts on each attachment part 31, but since these attachment parts 31 are relatively spaced apart from each other, the reaction force that the tilling claws 3 receive from the soil is applied to the attachment parts 31 by lever action. The effect of the reaction force is also not that large. Moreover, each mounting part 3
1 is composed of a single plate sandwiching the tilling shaft 1, so that the reaction force from the soil is shared between each attachment part. Therefore, the attachment portion 31 is not easily deformed, and the attachment strength can be improved. Moreover, since the reaction force acting on each attachment part 31 is small,
It is also possible to make the wall thickness thinner, and it is also possible to reduce the weight. Therefore, in a tillage device in which a large number of tillers are installed, the weight can be greatly reduced and the power loss can be extremely reduced.

Further, for example, when the tilling shaft 1 is rotated in the normal rotation work direction S, the vertical blades 34 cut into the soil, and the soil is turned over, that is, the tilling work is performed. At this time, since the tip of the blade part 33 is formed into a refracting surface shape bent at an obtuse angle within the rotational plane of the tilling shaft 1, it becomes difficult for soil to escape against the cut of the vertical blade 34. can be more reliably reversed.

In the above embodiment, the tiller claw 3 can be rotated in both forward and reverse directions, but this invention is not limited to the above embodiment and can also be applied to, for example, a normal tiller claw.

As explained above, according to the structure of this invention,
The mounting strength can be improved, and there is less deformation of the tiller claws.
Furthermore, since it is possible to reduce the weight, it is possible to achieve a large amount of quantification as a whole when attached to a tillage device, and it is also possible to reduce power loss.Furthermore, it is possible to reduce the power loss by improving the soil turning efficiency. Work efficiency can also be improved.

[Brief explanation of the drawing]

FIG. 1 is a front view showing the structure of a tilling device according to this invention, FIG. 2 is a side view of a tilling claw which is a main part of the device, and FIG. 3 is a plan view of the tilling claw. 1... Tilling shaft, 3... Tilling claw, 31... Mounting part.

Claims (1)

[Scope of utility model registration request] A mounting part that is formed to sandwich the tilling shaft from the radial direction by removing a part of the intermediate band of a single plate and is attached to the tilling shaft side, and a mounting part that is connected to the mounting part and is mounted in the rotation plane of the tilling shaft. A tilling claw characterized by having a tip bent at an obtuse angle.