JP3158361B2 - Rubber crawler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber crawler used for agricultural machines and other running parts, and more particularly to a rubber crawler with reduced noise and vibration.

[0002]

2. Description of the Related Art In recent years, rubber crawlers have been widely used as traveling devices for agricultural machines, construction machines and civil engineering machines. Such a rubber crawler is stretched between a drive wheel and an idler wheel. On the ground side, a plurality of wheels provided on the body roll on the inner peripheral surface of the rubber crawler, and on the inversion side. Usually, one carrier roller is provided in the body, and supports the inner peripheral surface of the rubber crawler.

FIG. 1 is a side view of the rubber crawler traveling device, wherein 1 is a rubber crawler, 2 is a driving wheel, 3 is an idle wheel, 4 is a rolling wheel provided on the ground side, and 5 is a rolling wheel. A carrier roller 6 is provided on the reversing side.

However, as shown in FIG. 2, in this type of rubber cradle 1, a large number of metal cores 7 are embedded at a constant pitch in the longitudinal direction of the rubber cradle 1. The pair of extending corners 8, 8 is rubber
Generally, it protrudes from the inner peripheral surface of the la 1. In a construction machine or the like, the above-described rolling wheel 4 is configured to roll on the top surfaces of the corners 8. Therefore, the carrier roller 5 provided on the reverse side of the rubber roller 1
Also rolls on the top surfaces of the corners 8,8.

[0005]

In particular, the carrier roller 5 used here has a smaller diameter than the rolling wheel 4 provided on the grounding side, so that the carrier roller 5 between the corners 8, 8 is provided. As the roller 5 falls, it rolls while repeatedly colliding with the corners of the corners 8 one after another. And, the faster the traveling speed, the more noise and vibration generated by the collision between the metals will occur,
This not only affects the operator but also significantly deteriorates the working environment.

[0006] The core metal 7 on which the ground-side rolling wheel 4 rolls.
The carrier roller 5 is also caused to roll on the corners 8 of the base member 8 so that the corners 8 are formed as long as the core metal 7 is made of metal.
Is also a metal, and such contact and collision between metals cannot be avoided due to the structure of the rubber crawler.

[0007]

Means for Solving the Problems The present inventor has conducted intensive studies to solve the major drawbacks of the conventional rubber crawler traveling apparatus, and as a result, has achieved the following constitution. .

That is, the gist of the present invention consists of an endless rubber elastic body, a core bar which is embedded side by side in the longitudinal direction, and a steel cord row surrounding the core bar. A rubber lug formed on the outer peripheral side of the endless rubber elastic body and having a pair of corners extending from the cored bar protruding in a row toward the inner peripheral side of the endless rubber elastic body; A rubber protrusion higher than the height of the corner is provided on the inner peripheral surface, and a carrier roller provided adjacent to the corner and provided on the reverse side of the rubber crawler rolls on the top surface of the rubber protrusion. The present invention relates to a rubber crawler having reduced noise and vibration. Preferably, the rubber protrusions are formed side by side on the outside in the width direction of the pair of corners, or are rubber rollers formed between the corners adjacent to each other in the longitudinal direction of the rubber crawler.

[0009]

In the rubber roller as described above, the rolling wheel on the grounding side rolls on the corner extending from the core metal as before, but the carrier roller on the reversing side. In this case, since a rubber projection having a height higher than the corner extending from the cored bar is formed, the rubber projection rolls on the top surface. Unlike the wheel on the ground side, the carrier roller does not roll while applying a load, but instead supports the weight of the rubber roller, and has a rubber protrusion with which the carrier roller contacts. Does not exert much force, and it is sufficient to be very slightly taller than the corners. That is, the carrier roller does not directly collide with the metal corners, but repeats collision and contact with extremely elastic rubber projections. It is also remarkable.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 3 is a partial cross-sectional perspective view showing a first embodiment of the rubber crawler of the present invention, and FIG. 4 is a cross-sectional view of a main portion thereof in a width direction.

In the figure, 10 is a rubber crawler,
Core metals 12 are embedded side by side at a constant pitch in an endless rubber elastic body 11, and mainly left and right wing portions 13 of the core metal 12 are embedded in the rubber. The central portion 14 of the metal core 12 is an engagement portion with a sprocket (not shown). A pair of corners 15 and 16 extending from the metal core 12 are formed with the engagement portion 14 interposed therebetween. The corners 15 and 16 project from the rubber elastic body 11 and form a row in the longitudinal direction of the inner peripheral surface of the rubber crawler 10.

In this example, the rubber projections 17 and 18 are in contact with the outer sides of the corners 15 and 16 in the width direction and are formed within the width of the carrier roller 40 on the reverse side. In the drawing, reference numeral 19 denotes a steel cord row which surrounds the wings of the cored bar 12 and is embedded in the rubber elastic body 11, and reference numeral 20 denotes a rubber lug on the ground side.

On the other hand, the relationship between the rubber roller 10 and the carrier roller 40 provided on the reverse side of the rubber roller 10 is as shown in FIG. 18 will roll on the top surface.

The corners 15 and 16 and the rubber projections 17 and 18
In the boundary portion between them, it is preferable from the viewpoint of durability to be separated by the groove 21. Although not shown, a cored bar 12 whose corners 15 and 16 are deviated back and forth with respect to the longitudinal direction of the rubber crawler 10 is also used. What is necessary is just to form in order of the displacement of the parts 15,16.

FIG. 6 is a plan view showing the second embodiment of the rubber crawler according to the present invention, as viewed from the inner peripheral surface side. In the figure,
The corners 15 and 16 use the metal core 12 slightly shifted back and forth as described above, and the rubber projections 17 and 18 used for rolling of the carrier roller 40
Within a width of 1 mm, a pair of corners 15 and 16 of
Only one is formed, which is provided alternately in the longitudinal direction. That is, when the rubber projection 17 is formed in contact with the corner 15 of one core metal 12, the rubber projection 18 is formed in contact with the corner 16 in the adjacent metal core 12.

In this example, the relationship between the carrier roller 40 and the rubber roller 10 is such that the carrier roller 40 is supported on one side with respect to the carrier roller 40.
The ra-40 comes into contact with the rubber protrusion and one corner,
Even in this case, there is no drop in the carrier roller 40,
Therefore, a large collision with the corner is avoided, and the generation of noise and vibration is significantly reduced.

As described above, the object of the present invention can be attained if the collision between the carrier roller 40 and the top surfaces of the corner portions 15 and 16, that is, the contact between the metals is avoided. In this sense, another embodiment will be described below.

FIG. 7 is a plan view showing the third embodiment of the rubber crawler according to the present invention, as viewed from the inner peripheral surface side. This is a rubber crawler 10 using the cored bar 12 in FIG. 6 described above. Rubber projections 17 and 18 are formed between the corners 15 and 15 and 16 and 16 of the adjacent cored bar 12 and 12. It was done.

In this example, the grounding-side rolling wheel 30 rolls sequentially on the top surfaces of the corners 15 and 16, while the reverse-side carrier roller 40 moves in the longitudinal direction of the rubber roller 10. Between the adjacent corners 15, 15 and 16, 16, the rubber projection 1
7 and 18, the carrier roller 40 does not fall between the corners, and the corners 1
The carrier roller 40 smoothly rides on the tops of the corners 15 and 16 without colliding with the corners of the corners 5 and 16 and leaves.

Also in this case, the carrier roller 40 rolls on the top surfaces of the rubber projections 17 and 18 and the corners 15 and 16, but noise and vibration are significantly reduced. Even in the example of FIG. 7, it is desirable from the viewpoint of durability that the boundary between the corners 15 and 16 and the rubber projections 17 and 18 is divided by the groove as described above.

FIG. 8 shows the rubber projection 17 in FIG.
This is a modification of Example 18, in which collision between the corners 15, 16 and the carrier roller 5 can be avoided. Needless to say, such examples are not limited, and the rubber projections of the present invention have various shapes. For example, although not shown, the top surface of the rubber projection may have an arc shape with the center at the maximum height. In this example, the left and right hem portions of the rubber projections 17 and 18 are slightly corner portions 1.
Even when the height is shorter than 5 and 16, the drop of the carrier roller 40 between the corners is very small, and therefore, the distance between the carrier roller 40 and the corners of the corners 15 and 16 is small. The collision is not so great, and the generation of noise and vibration is reduced.

[0022]

As described above, according to the present invention, since the collision and contact between the carrier roller and the corner on the reversal side of the rubber roller are restricted, the generation of noise and vibration based on this is effectively achieved. Since collisions between metals were avoided, breakage of corners and the like due to the collisions were also eliminated, leading to improvement in durability as a rubber crawler.

[Brief description of the drawings]

FIG. 1 is a side view of a conventional rubber crawler traveling device.

FIG. 2 is a cross-sectional view in the width direction of this kind of rubber crawler.

FIG. 3 is a partially sectional perspective view showing a first embodiment of the rubber crawler of the present invention.

FIG. 4 is a cross-sectional view in the width direction of a main part of the rubber crawler in FIG. 3;

FIG. 5 is a cross-sectional view in the width direction showing a relationship between a rubber roller and a carrier roller provided on the reverse side of the rubber roller.

FIG. 6 is a plan view from the inner peripheral side showing a second embodiment of the rubber roller of the present invention.

FIG. 7 is a plan view from the inner peripheral surface side showing a third embodiment of the rubber crawler of the present invention.

FIG. 8 is a modified example of the rubber projection in FIG. 7;

[Explanation of symbols]

 1,10 mm rubber crawler, 2 mm drive wheel, 3 mm idle wheel, 4,30 mm wheel, 5,40 mm carrier roller, 6 mm body, 7,12 mm Core bar, 8, 15, 16 square corners, 11 endless rubber elastic body, 13 wing, 14 sprocket engagement portion, 17, 18 rubber projection, 19 mm Steel cord, 20mm rubber lug, 21mm groove.

Claims (3)

(57) [Claims] 1. An endless rubber elastic body comprising an endless rubber elastic body, a metal core horizontally embedded in the longitudinal direction, and a steel cord row surrounding the metal core. A rubber lug is formed on the outer peripheral side of the endless rubber elastic body, and a pair of corners extending from the cored bar are protruded in a row toward the inner peripheral side of the endless rubber elastic body. A noise and vibration characterized in that a rubber protrusion higher than the height of the part is rolled on the top surface of the rubber protrusion, a carrier roller adjacent to the corner and provided on the reverse side of the rubber crawler is rolled. Rubber crawler with reduced 2. The rubber crawler according to claim 1, wherein the rubber projections are formed side by side on the outside in the width direction of the pair of corners. 3. The rubber roller according to claim 1, wherein the rubber projection is formed between adjacent corners in the longitudinal direction of the rubber roller.