JPH08224Y2 - Rubber crawler for wetlands - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a rubber crawler for wetlands used in mobile agricultural machinery and the like.

(Prior Art) Conventionally, as a rubber crawler for wetlands, the rug height is relatively high because it is necessary to increase the traction force in the wetlands. However, if the rugs are simply high, mud will stay between the rugs. It does not increase the traction force, and if the lug is too high, it will buckle and cause cracks or breakage during flatland traveling.Therefore, maintain the effective height of the lug to secure the traction force. Is needed.

FIG. 1 shows an example of a conventional wetland rubber crawler, where A is a plan view on the ground contact side and B is a sectional view. This example is a "ladder" type crawler, in which the lugs 2'protrude from both side ends of the rubber crawler body 1'to form the fins 2'a, so that the lugs 2'and the fins 2'a are formed. It will infiltrate into the mud moderately. In addition, 3'in the drawing
Is a core metal, 4'is a steel cord, and 5'is a sprocket claw engaging hole.

(Problems to be solved by the invention) Although the ladder-type crawler can obtain a reliable traction force in a wet field, stress concentrates at the root of the fin 2'a so that a crack may occur at this part. , Breaks.

The fins 2'a, 2'a are spaced from each other at substantially the same distance from the root of the fin 2'a toward the tip thereof.
The mud that has entered between the fin portions 2'a is likely to be scooped up on the inner peripheral surface of the rubber crawler body 2, and the mud may accumulate on the inner peripheral surface, which may hinder traveling.

The mud that is under the rubber crawler and is compressed by the machine load is discharged from both sides of the rubber crawler. Muddy soil may accumulate and hinder work.

The present invention is intended to provide a rubber crawler having excellent traction by improving the drawbacks of the "ladder" type crawler.

(Means for Solving the Problem) In a rubber crawler having a through rocket claw engaging hole in the central portion and having parallel lugs extending in the width direction at a constant pitch in the circumferential direction of the crawler body on the ground side. , One side edge of the lug extending in the width direction is about 1/3 from the edge of the crawler body.
From the inner peripheral portion of the claw to the outside in a Y-shape, and the branched V-shaped portion is used as a branch lug. It is characterized in that it is formed.

(Operation) The operation according to the above configuration of the present invention is as follows.

Each of the two branched lugs infiltrate mud sufficiently to enhance traction.

Since the distance between the roots of the two branched lugs is wide, this portion is difficult to bend and stress concentration can be avoided.

One side edge of the crawler body is mountain-shaped, and the flesh portion gradually widens from the root of the lug toward the side edge. It is no longer scooped up on the inner surface of the crawler.

The discharge of mud that is under the rubber crawler and is compressed by the load of the machine is blocked on the side edged by the branch lug in the shape of a mountain.

Still another operation of the present invention will be explained by the following examples.

(Embodiment) FIG. 2 shows an embodiment of the present invention, in which A is a plan view (ground side), B is a rear view (inner peripheral side), and C is an X of B.
It is a X-ray sectional view.

In the figure, 1 is a crawler body, and 2 is an engagement hole of a sprocket claw. The present invention is carried out as follows in forming the lug 3.

Reference numeral 3a denotes a long lug, which is provided at intervals of two sprocket claw engaging holes 2 so as to extend in the width direction of the crawler body 1, and the long lug 3a is moved toward the one edge of the crawler body 1 in the Y direction. The branch lugs 3b, 3b are formed at the V-shaped portion of the branched tip by branching into a letter shape, and the branch lugs 3b, 3b are formed as a thinned portion f, so that one end of the crawler body 1 is a branch lug 3
It is in a state of being trimmed into a mountain shape with b, 3b ....

3c is a short lug and is provided in the same parallel state between the two through rocket claw engaging holes 2 sandwiched by the long lugs 3a.

On the other hand, m is the inner root of the branch lugs 3b, 3b (long lug 3a
And a branching lug 3b), n is an outer end, and adjacent branching lugs 3b, 3b are formed so as to form a paddle of a constant width at this time. Is located on the same line as the short lug 3c.

The other 4 is a trapezoidal anti-bending body which is provided so as to sandwich the same portion on the opposite side where the base portion m of the branch lugs 3b, 3b is located, that is, on the inner peripheral surface side. 4 has an action of preventing the occurrence of cracks near the edge of the buried core. In addition, 5 is a core metal and 6 is a steel cord.

In the above embodiment, the long lugs 3a and the short lugs 3c are alternately arranged in parallel, and the short lugs 3c are used in consideration of the ease of removing mud to the outside. Easy to handle.

Incidentally, FIG. 3 shows another embodiment, in which the branch lugs 3b are curved in a concave shape along the cutout portions f, and adjacent branch lugs are provided between the front and rear cutout portions f. 3b and 3b are connected at the outer end. FIG. 4 shows still another embodiment, in which a branch lug 3b and a cutout portion f'are provided at the other side end of the rubber crawler body 1 as well.

(Effect of the Invention) Since the rubber crawler according to the present invention is configured as described above, it has the following excellent effects.

Since the lugs are branched and the flesh part f is provided between the lugs, the lugs sufficiently infiltrate into the mud to enhance the stamping force.

Since the thickness-reduced portion f is widened from the root of the branch lug toward the end on the crawler side, the mud that has entered the thickness-reduced portion can be discharged and dropped smoothly and reliably, and there is no reduction in traction force. .

Since the distance between the roots of the adjacent branch lugs is wide between the cutout portions before and after the crawler circumferential direction, and the anti-bending body is formed on the inner circumferential side, it is difficult to bend near the roots. , Since stress concentration hardly occurs in this part,
No cracking or breakage occurs and durability is improved.

Since one edge of the rubber crawler body is edged by the branch lug, the mud that is below the rubber crawler and is compressed by the airframe load is prevented from moving by the branch lug and is not discharged to the branch lug side. Therefore, if the side provided with the branch lug is installed so as to be the outside of the machine body, the mud is not discharged to the outside and the mud is not dropped on unharvested crops during agricultural work, resulting in good work efficiency. Become.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a conventional example, where A is a plan view of the ground plane side, and B is a plan view.
2 is a sectional view, FIG. 2 shows the present invention, A is a plan view of the ground surface side, B is a plan view of the inner peripheral surface side, and C is an X of B.
-X sectional drawing, FIG.3, and FIG.4 is a top view by the side of the grounding surface which shows another example. 1 ... Crawler body, 2 ... Sprocket claw engagement hole 3a ... Long lug, 3b ... Branch lug 3c ... Short lug, 4 ... Bending prevention body 5 ... Core bar, 6 ... Steel cord

Claims (2)

[Scope of utility model registration request] 1. A rubber crawler having a sprocket pawl engaging hole in the center and having parallel lugs extending in the width direction at a constant pitch in the circumferential direction of the crawler body on the ground contact side, extending in the width direction. One side end of the lug is branched from the end edge of the crawler main body outward from an inner peripheral portion of about 1/3 to a Y shape, and the branched V-shaped portion is used as a branch lug.
A crawler for a wet field, characterized in that the edge of the crawler is formed in a mountain-cut shape as a cutout portion outside the branch lug. 2. A trapezoidal anti-bending body is provided at regular intervals before and after the crawler length direction at a corresponding portion on the inner peripheral side opposite to the branch point of the lug extending in the width direction and the branch lug. The rubber crawler for wetlands according to claim 1.