JPH0117124Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a forward and reverse type tilling claw, which includes a catch joint at the bottom, a claw main body extending radially outward from both ends of the catch joint, and a mounting base protruding from the center of the catch joint. It is a forward/reverse tilling claw which has a chevron frame shape and is capable of both forward and reverse use.In particular, by setting the driving start point sufficiently low and close to the center of rotation within an approximately specified rotation radius, the driving force is strong and the resistance is small. In addition, by lowering the driving starting point, the effective length of the tilling action up to the tip of the claw can be made sufficiently long within the specified height range, thereby ensuring effective tilling work. It was planned as such.

For example, in a tilling rotary that is prepared to be towed at the rear of a tractor, the rotary transmission system is configured so that it can be rotated forward and backward, but the tilling claws that are driven to rotate by this have a cutting edge only on one side. However, this has various inconveniences because it requires time and effort to change the pawl shaft in the left-right direction or to replace only the pawl in the opposite direction when reversing the rotation.

Therefore, the applicant of the present application has devised a special type of tilling claw 1 that can be used both in forward and reverse directions as shown in FIG. The tilling claw 1 is integrated with a mounting base 4 that is attached to a claw attachment bracket 3 protruding from the outer periphery of the tilling claw shaft 2, and is integrated with the tip of the base 4 in an intersecting manner, forming a protruding shape in the front and back of the rotation direction. A pair of front and rear support joints (stays) 5, and a chevron-shaped outer circumferential cutting edge curved surface to form a hollow-shaped soil removal promotion hole 6 integrated into the end of each joint 5, 5 between the support joints 5. These special claws were thought to be effective in not only eliminating the drawbacks of the conventional ones but also in terms of their superior soil removal effect. During operation, the mounting base 4 becomes quite long and the driving starting point 8 becomes high accordingly.As a result, under the same torque, the driving force becomes small and the driving resistance increases, which is undesirable. The length of tilling action had to be shortened, which could lead to a tilling state with a shallow effective depth.

This invention was made from this point of view, and therefore, the features here include that the mounting base has approximately the same length as the claw mounting bracket, and
The point is that a carrier joint is arranged on a line that linearly connects both driving starting points set on the nail body or at a height near the outer diameter direction of the line.

The contents of this invention will be explained below with reference to the illustrated embodiments.

Figures 2 and 3 are the first embodiment, and 2
is a tilling claw shaft, and the shaft support method does not matter. 3 is the same claw shaft 2
A large number of claw attachment brackets are arranged around the outer periphery of the bracket, and although the brackets are shown in the figure as independent cylinders, they may be in the form of a flange. Reference numeral 1 is a specially devised forward/reverse tilling claw, which has a mounting base 4 at the lower center end, a T-shaped joint 5 fixed to it by welding,
and a pair of left and right claw body parts 7.

The mounting base 4 has approximately the same length as the claw mounting bracket 3 and is removable with a mounting tool 9. The mounting base 4 is provided with a horizontal support joint 5 at its upper end, and this support joint 5 has the above-mentioned height relationship. It is set sufficiently low based on This carrying joint 5 has each end 5 in the front and back of the rotation direction.
a, 5a, each end 5a, 5
Line-symmetrical claw body parts 7, 7 are provided by welding to protrude from a.

The claw body parts 7, 7 are formed by cutting out the base and tip of a conventional normal (standard) claw as shown in the figure and welding them together at the tip, 7a.
The blades form a mountain shape with each other at the cutting edge, and driving starting points 8, 8 are set near the base ends thereof. The tip side is the inversion part 7
b, 7b, and its appearance is as shown in Fig. 3. In Fig. 2, the whole is curved toward the front side of the drawing as it reaches the tip, and in order to make the reversal more active, it has a composite shape at the center line O. It is said to have a curved shape. In other words, simply curving the surface toward the front in FIG. 2 would not make it possible to perform the reversal operation, so a compound incline shape was created to counteract the inclination in the direction of rotation.

In the same embodiment, a large earth removal promoting hole 6 is formed in the center, and various parts are welded together to form an integral structure, but of course an integral punching type may also be used.

The ones shown in FIGS. 4 to 6 have a sharp tip in FIG. 2, whereas the tip is shaped like a conventional regular nail with one side a of the tip removed, as shown in the imaginary line. In this case as well, the inverted portion 7b is naturally formed as described above. In this example, the desired effect is similarly achieved, but since the width of the reversing part 7b is long in the rotation direction, it is possible that the plowed soil may be pounded on the trailing side. It is presumed that the example is more preferable.

The one shown in FIGS. 7 and 8 is the third embodiment, in which the front and rear ends of the bearing joints 5, 5 are lowered slightly downward and the base end of the claw body 7 is fixed thereto, and the driving starting point is Nos. 8 and 8 are lower and allow longer effective tilling length. In this case, an example is shown in which the center line of the transfer line 5 is slightly higher than the line l connecting the driving starting points 8, 8. Of course, in this case as well, integral punching may be used.

Therefore, if we assume that the height from the center of the pawl shaft is the same as in the past, as is common to each of the above examples, the driving starting points 8, 8 will be sufficiently low and close to the pawl shaft side during this period, so the torque relationship will be The driving force becomes stronger, and it is possible to drive smoothly from closer to the root at a suitable angle than in the case shown in Figure 1, making it possible to perform deep and effective tillage with very little resistance and a long working length. . In addition, the plate frame surface is strongly supported by the support splice 5, which reduces the force applied during tilling, so that strong tilling and wear and tear can be prevented.

This idea is as described above, and therefore, it has a chevron-shaped plate frame shape that has a support joint at the bottom, a claw main body extending axisymmetrically from both ends, and a mounting base protruding from the center of the support joint. In particular, by setting the driving start point sufficiently low and close to the center of rotation within an approximately specified rotation radius, it is possible to perform tilling work with strong driving force and little resistance. In addition, by lowering the driving starting point, the actual length of tilling action up to the tip of the claw can be made sufficiently long within the specified height range, thereby ensuring effective tilling work. In addition, the soil removal promotion hole can be formed with a sufficiently large margin, which also solves the problem of soil clogging.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing a comparative example, FIG. 2 is a side sectional view showing the first embodiment of this invention, FIG. 3 is a top view thereof, and FIG. 4 is a side sectional view of the second embodiment. FIG. 5 is a side view thereof, FIG. 6 is a top view thereof, FIG. 7 is a side sectional view of the third embodiment, and FIG. 8 is a side view thereof. 1...Tilling claw, 2...Tilling claw shaft, 3...Claw attachment bracket, 4...Mounting base, 5...Carrying joint,
6...Earth removal promotion hole, 7...Claw body, 7a...Blade tip, 8...Driving starting point.

Claims (1)

[Scope of utility model registration request] A mounting base that is attached to a claw attachment bracket protruding from the outer periphery of the tilling claw shaft, a pair of front and rear bearing joints that are integrated in a crisscross shape at the tip of the base and project in the front and back of the rotation direction; For both forward and reverse use, the claw body is integrated with the end of the support joint and is formed with a chevron-shaped peripheral edge curved surface to form a hollow-shaped soil removal promotion hole between the support joint and the support joint. In the type tilling claw, the mounting base has approximately the same length as the claw mounting bracket, and has a height on a line that linearly connects both driving starting points set on the claw body or in the vicinity of the outer diameter direction thereof. A dual-purpose tilling claw that can be used in both forward and reverse directions, with a reciprocating joint placed in between.