JPH0446082B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a tilling claw for forward and reverse rotation, which is attached to a tilling shaft of a rotary tiller.

[Prior Art] In recent years, the up-cut tilling method (turning the tilling shaft in the opposite direction) has been reconsidered, compared to the down-cut tilling method (turning the tilling shaft in the forward direction), which has traditionally been overwhelmingly used in rotary tillage devices. For this reason, various types of rotary tillers have been proposed and put into practical use by improving rotary tillers for both down-cutting and up-cutting. One known example is one in which a tilling shaft is rotated forward and backward, and a tilling claw on this tilling shaft swings in one direction in response to the forward and reverse rotation. If it were to be oscillated by forward and reverse rotation, not only would the configuration become complicated, but there would also be problems such as poor tangle-evacuation properties of straw culms, etc.

[Problems to be solved by the invention]

In view of the above circumstances, the present invention is capable of adapting to both down-cut and up-cut cultivation methods by fixing the tilling claws to the tilling shaft and rotating the tilling shaft in forward and reverse directions. It is an object of the present invention to provide a tilling claw for forward and reverse rotation that has good properties.

[Means to solve the problem]

In order to achieve the above object, one aspect of the present invention is a claw seat provided on the outer periphery of a tilling shaft that is horizontally mounted and capable of rotating in forward and backward directions, so as to be orthogonal to the axis of the tilling shaft. A tilling claw for forward and reverse rotation is attached to the tiller claw by forming a recess along the claw seat in the shank portion corresponding to the claw seat, or by forming a recess along both side edges of the claw seat. The tilling claw is characterized in that a receiving plate is provided, and draining blade edges are formed on both sides of the tilling claw from at least the attachment portion of the claw seat and the tilling claw to the tip. Another aspect of the present invention is that the tilling shaft is horizontally mounted and can be rotated in forward and reverse directions through a claw seat provided on the outer periphery of the tilling shaft so as to be orthogonal to the axis of the tilling shaft. A tilling claw for rotation is installed, and this tilling claw forms draining blade edges on both sides, and also connects the axis of the tilling shaft with the center of the mounting part of the claw seat and the axis of the tilling shaft. It is characterized in that the line connecting the core and the widthwise center of the tip of the tilling claw is attached to the claw seat with a predetermined angle shift toward the reverse side.

【Example】

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a tilling shaft of a rotary tilling device, and this tilling shaft 1 is mounted horizontally and can rotate forward and backward about an axis O. As shown in FIG.
The base of a claw seat 2 shown in FIG. 2 is fixed to the outer periphery of the tilling shaft 1 so as to be perpendicular to the axis O of the tilling shaft 1, and a mounting hole 2a is bored in this claw seat 2. ing. The tilling claw 3 attached to the claw seat 2 has a rectangular recess 4 formed in its shank portion corresponding to the claw seat 2, and a mounting hole 4a corresponding to the mounting hole 2a is bored in this recess 4. As shown in the figure, the tiller claw 3 is fixed to the claw seat 2 by inserting bolts into the mounting holes 2a and 4a and tightening them with nuts. Moreover, as is clear from FIG.
It is curved with a circular arc of the same curvature as the outer circumference of. The tilling claw 3 has a planar shape in which both ends in the longitudinal direction of a spindle shape are cut off, and includes a vertical blade part 3a extending in a radial direction from the axis O of the tilling shaft 1, and a distal end side of the vertical blade part 3a. It consists of a horizontal blade part 3b (see Fig. 3) which is bent to one side (approximately 60 degrees) along the folding line The connecting straight line OR and the straight line OP passing through the center O of the tilling shaft 1 and the center of the mounting hole 2a of the claw seat 2 and the mounting hole 4a of the recess 4 are shifted toward the reverse direction (UC) side by the deviation angle ω, which will be described later. ing. When the rotary tiller moves in the direction of the arrow in Fig. 1, the tilling shaft 1 and the tilling claws 3 rotate in either the forward direction (down cut = DC direction) or the reverse direction (up cut = UC direction). It's becoming possible. Further, on the left and right side edges of the tilling claw 3, there are blade edges 5,
6 is formed, and the blade edges 5 and 6 have a draining property as is clear from FIG. It is provided closer to the tilling shaft 1 than the distance from the outer periphery of the tilling shaft 1, and is formed continuously to the tip of the horizontal blade portion 3b. In the tilling claw for forward and reverse rotation configured in this way, first, the tilling shaft 1 and the tilling claw 3 are rotated forward (the first
(in the direction of arrow DC in the figure), the vertical blade 3a and the horizontal blade part 3b perform a down-cutting action similar to the conventionally known machete claw to perform plowing work with good reversibility.
Furthermore, when the tilling shaft 1 and the tilling claws 3 are reversed (in the direction of the arrow UC in Fig. 1), the tilling work is performed by an up-cut action with good release properties similar to the conventionally known L-shaped claws, but in this case, Plowing into cultivated land is
Since it is on the side of cultivated land, it has the same effect as the L-shaped claw but requires less tilling resistance. In addition, in both forward and reverse rotations, the tilling claw 3 positions the claw seat 2 in the recess 4 and opens the mounting hole 2.
a, 4a, and the blade edges 5, 6 have a tangle-repelling property.
The base end of 6 is formed closer to the tilling shaft 1 than the attachment holes 2a and 4a, so straw culms etc. scattered in the field are cut and drained, and these are connected to the attachment hole 2.
This prevents entanglement with the bolts/nuts inserted through the holes 4a and 4a and the tilling shaft 1. In addition, the tilling claws 3 are different from the conventionally known swinging claws.
Since it does not swing, it is advantageous in terms of strength, and the base etc. can be formed thinner than the swinging claw. In another embodiment of the invention shown in FIG.
A straight part 7 is formed without providing the recess 4 of the embodiment shown in FIGS. 1 and 2, and a mounting hole 7a is bored in this straight part 7, and it corresponds to the outer edge of both sides of the claw seat 2. The receiving plates 8, 8 are provided, and the other parts are the same as the embodiments shown in FIGS. 1 and 2. The tilling claw 3 of this embodiment differs from that of the previous embodiment only in the manner in which it is attached to the claw seat 2, and there is almost no difference in function from that of the previous embodiment.

【Effect of the invention】

As explained above, according to the tilling claw 3 for forward and reverse rotation of the present invention, first, the recess 4 or the receiving plates 8, 8 are provided along the claw seat 2 in the shank portion corresponding to the claw seat 2, and the tilling claw 3 is used for tilling. Since draining blade edges 5 and 6 are formed on both sides of the claw from the attachment parts 2a, 4a, and 7a of the claw seat 2 and tilling claw 3 to the tip, the tilling claw 3 can be rotated in either the forward or reverse direction. Even in such a case, the straw culms, etc. are cut by the edge of the draining blade, and the straw culms, etc. are cut off by the draining blade edge, and the straw culms, etc. are wrapped around the bolts and nuts of the mounting parts 2a, 4a, and 7a, or the straw culms, etc. Wrapping is prevented. Next, the tilling claw 3 of the present invention has draining blade edges 5 and 6 formed on both side edges, and a straight line OP connecting the axis O of the tilling shaft and the center of the attachment part of the claw seat, and the straight line OP of the tilling shaft 1. The straight line OR connecting the axis O and the middle of the tip of the tilling claw 3 in the width direction M is at a predetermined angle ω on the reverse side (UC side).
Since it is attached to the claw seat 2 with an offset, when the tilling claw 3 rotates forward (down cutting), it is possible to perform tilling work with good reversibility like a conventional hatchet claw, and also,
When the tilling claws 3 are reversed (up-cutting), tilling work with good release performance can be performed like the conventional L-shaped claws. Therefore, the tilling claw 3 of the present invention can appropriately perform both down cutting and up cutting operations without swinging while being fixed to the tilling shaft, and also has a simple structure, is easy to manufacture, and can be provided at low cost. It has excellent effects such as:

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment of the present invention, and FIG.
3 is a sectional view taken along the line A-A in FIG. 1, FIG. 4 is a sectional view taken along the line B-B in FIG. 1, and FIG. 4 is a sectional view taken along the line A-A in FIG. It is a sectional view of a corresponding part. 1... Cultivation shaft, 2... Claw seat, 2a, 4a, 7a
...Mounting hole, 3...Tilling claw, 3a...Vertical blade part, 3
b...Horizontal blade part, 4...Concave part, 5, 6...Discharge blade edge, 7...Straight part, 8...Brace plate, O...Axis of tilling shaft, OP, OR...Straight line, M...Tip width of tilling claw, X...Bending line of horizontal blade, ω...Deflection angle, DC
...down cut, UC...up cut.

Claims (1)

[Scope of Claims] 1. A tiller for forward and reverse rotation via a claw seat provided perpendicularly to the axis of the tillage shaft on the outer periphery of a tillage shaft that is horizontally mounted and capable of forward and reverse rotation. This tilling claw is designed to have a recess formed along the shank portion corresponding to the claw seat, or a receiving plate is provided along both side edges of the claw seat, so that the tilling claw can be attached with A tilling claw for forward and reverse rotation, characterized in that a draining blade edge is formed on both side edges at least from the attachment part of the claw seat and the tilling claw to the tip. 2. A tilling claw for forward and reverse rotation is attached to the outer periphery of a tilling shaft that is mounted horizontally and is capable of forward and reverse rotation via a claw seat provided perpendicular to the axis of the tilling shaft. , this tilling claw forms draining blade edges on both sides, and a line connecting the axis of the tilling shaft and the center of the attachment part of the claw seat, and the width direction of the axis of the tilling shaft and the tip of the tilling claw. A tilling claw for forward and reverse rotation, characterized in that the tilling claw for forward and reverse rotation is attached to the claw seat with a line connecting the center shifted by a predetermined angle toward the reverse rotation side.