JPH06234379A - Rubber crawler securing propulsion force - Google Patents

Abstract

PURPOSE:To heighten the effect of eliminating mud and the like clogged between lugs by providing separate tension member rows at lug parts at the cross- direction ends of a rubber crawler of such constitution that numerous core metals are embedded at constant spaces apart in a rubber elastic body and that tension members are embedded in the state of surrounding these core metals. CONSTITUTION:In a rubber crawler 3, numerous core metals 4 are embedded at constant spaces apart in an endless rubber elastic body, and steel cord rows A serving as tension member rows are embedded in such a way as to surround the core metals 4. In addition, a rubber lug 6 is integrally formed at the outer peripheral surface of the rubber elastic body. In relation to the steel cord rows A, separate steel cord rows B are disposed at lug parts 5, the cross-direction ends of the rubber crawler 3, in the inclined state so as to be positioned on the outer peripheral side toward the lug part ends. At the time of winding the rubber crawler 3 between the sprockets and rotating it, the lug parts 5 can be thereby deformed being bent inward and reset into the original positions before and after the time of passing the sprockets so as to obtain the effect of dropping mud.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber crawler and, more particularly, to a rubber crawler having secured and improved propulsive force even in wetlands.

[0002]

2. Description of the Related Art Rubber crawlers are widely used as running parts of agricultural machinery, but when used in wetlands, mud is clogged between the lugs formed on the outer peripheral side of the rubber crawlers and they do not fall. Since it lifts up from the ground and rotates, the original propulsive force may be significantly reduced even if the rubber crawler comes into contact with the ground again.

That is, mud, pebbles, and the like are lifted while being clogged between the lugs, and this is grounded as it is. This is the same as that the rubber lug is not formed on the outer peripheral surface of the rubber crawler, and the propulsive force of the rubber crawler is reduced even when the rubber crawler is rotated, so that the airframe cannot be run.

For this reason, it has been proposed that the widthwise ends (ears) of the rubber crawler be bent so that mud or the like stuck between the lugs is dropped. This is because a rubber crawler generally has a large number of cored bars embedded therein, and a tensile body row A (steel code row A) surrounding the cored bar is also embedded in the same manner. In addition, the so-called rubber crawlers are designed to bend at their ears. However, even with this type of rubber crawler, it is difficult to bend the ears sufficiently, and the durability of the bent portion of the rubber is poor, and the life of the rubber crawler is shortened accordingly.

[0005]

SUMMARY OF THE INVENTION The present invention is directed to a rubber black
The structure of the rubber crawlers for effectively bending the ears of the rubber crawlers.
This is to embed the cord row B) and specify the embedding position to ensure the bending movement of the ear.

[0006]

The present invention has been made in order to achieve the above object, and its gist is to embed a large number of cored bars in an endless rubber elastic body at regular intervals, and A rubber crawler in which a tensile body row A enclosing the cored bar is embedded, and a rubber lug is formed on the outer peripheral surface of the endless rubber elastic body, the widthwise direction of the endless rubber elastic body having the cored bar removed. The present invention relates to a structure of a rubber crawler characterized in that a tensile body row B located on the outer peripheral surface side of the tensile body row A surrounding the cored bar is embedded in the end. A steel cord is usually used for the tension body string.

[0007]

In general, the rubber crawlers are arranged side by side in the longitudinal direction and a large number of core bars are embedded therein, and a steel cord row as a tensile body is also embedded outside the core bars. A rubber lug is formed on the outer peripheral surface. And
As shown in FIG. 6, the rubber crawler is wound around a sprocket 1 and an idler-2 provided at the front and rear of the machine body, and is used for running with a tension always applied. However, when tension is applied to the rubber crawler 3, the steel cord row A arranged outside the cored bar 4 bears the tension, which serves as a reference surface of the tension, and the presence of the cored bar 4 causes the steel cord to move. A uniform force is applied to the rucode row A. On the other hand, the end in the width direction of the rubber crawler 3, that is, the ear portion 5, is generally bent toward the inner peripheral side as shown in FIG. 7.

The present invention is intended to effectively control the bending of the ear portion 5 of the rubber crawler 3 toward the inner peripheral side, and in the ear portion 5 of the rubber crawler 3 as shown in FIG. , The steel code row B is arranged and buried on the outer peripheral side of the steel code row A. Therefore, when the rubber crawler 3 is wound between the sprocket 1 and the idler-2 and tension is applied to the sprocket 1, the steel roller of the ear portion 5
Since the train row B does not have any restraint inside it, it will be displaced to a position according to the steel code train A as shown in FIG. In this way, rubber
The ears 5 of the la 3 are semi-forcibly bent toward the inner peripheral side, and this is repeated.

In the rubber crawler 3 of the present invention, the deformation in which the ear portion 5 of the rubber crawler 3 is bent to the inner peripheral side and returned to the original position is always repeated. Therefore, the ear 5
The mud clogging between the rubber lugs 6, 6 formed on the outer peripheral side of the is more likely to fall than the lugs 6, 6 due to the repeated deformation. And rubber crawler 3
At the time of grounding again, at least the mud E formed between the rubber lugs 6 formed on the ears 5 has fallen, so that the propulsive force is reliably transmitted to the rubber crawler 3. In the figure, 7 is a wheel and 8 is a roller.

[0010]

EXAMPLES The structure of the rubber crawler of the present invention will be described in more detail with reference to examples. FIG. 1 is a sectional view showing a first embodiment of a rubber crawler of the present invention, and FIG. 2 is a conceptual sectional view when wound around a sprocket 1. In this rubber crawler 3, as described above, the steel cord row A surrounding the cored bar 4 is different from the steel cord row B in the ear 5 of the rubber crawler 3 at the end of the ear. Is inclined so as to be located on the outer peripheral side.

However, when the rubber crawler 3 is wound around the sprocket 1 and the idler-2, as shown in FIG. The row B is displaced to the inner peripheral side and is deformed to a substantially horizontal position which is the same as that of the steel cord row A, and this deformation of the ear portion 5 is constantly repeated and jammed between the rubber lugs 6 and 6. This makes mud easier to fall.

FIG. 3 shows a second embodiment of the rubber crawler 3 of the present invention. The steel cord row B in the ear portion 5 is different from the steel cord row A surrounding the core metal 4. In this example, the step d is embedded in the rubber.

FIG. 4 shows a third embodiment of the rubber crawler 3 of the present invention. The steel cord row B in the ear portion 5 is different from the steel cord row A surrounding the cored bar 4. It is an example in which it is gradually inclined outward and then horizontally.

FIG. 5 shows a fourth embodiment of the rubber crawler 3 of the present invention. The steel cord row B in the ear portion 5 is different from the steel cord row A surrounding the cored bar 4. It is arranged in a mountain shape on the outer peripheral side from the end of the lever.

In the above-described embodiment, the first embodiment has a smooth deformation when wrapped around a sprocket or an idler. Therefore, the rubber roller is less likely to be deformed excessively, and the rubber black is less likely to be deformed. -The durability of la is improved. In addition, in the second embodiment, although shear deformation is added, the mud-removing effect is great, and its manufacture is relatively easy. Further, the rubber crawler of Example 3 exhibits an effect intermediate between those of Example 1 and Example 3. Furthermore, the rubber crawler of the fourth embodiment has the characteristic that the end concentrated stress in the rubber crawler of the first embodiment is reduced, and the durability of the rubber crawler is further enhanced.

[0016]

As described above in detail, the present invention provides a rubber cloth.
The tensile body row B is arranged at a specific position of the ear portion of the la. Therefore, when the rubber crawler is wound between the sprocket and the idler, the ear portion is surely deformed, For this reason, the mud and the like clogged between the rubber lugs will surely fall, and the propulsive force of the rubber crawlers will be secured there.

[Brief description of drawings]

FIG. 1 is a cross-sectional view in the width direction of a first embodiment of a rubber crawler of the present invention.

FIG. 2 is a cross-sectional view of the rubber crawler shown in FIG. 1 when it is wound around a sprocket.

FIG. 3 is a cross-sectional view in the width direction of a second embodiment of the rubber crawler of the present invention.

FIG. 4 is a cross-sectional view in the width direction of a third embodiment of the rubber crawler of the present invention.

FIG. 5 is a cross-sectional view in the width direction of a fourth embodiment of the rubber crawler of the present invention.

FIG. 6 is a side conceptual view showing an overall view of a rubber crawler.

FIG. 7 is a cross-sectional view of a conventional rubber crawler wound around a sprocket.

[Explanation of symbols]

A ... Steel code row arranged on the outside, B ... Steel code row at the ear, d ... Step between the steel code row A and the steel code row B, 1 ... Sprocket, 2 ... Idler, 3 ... Rubber crawler, 4 ... Core bar, 5 ... Crawler width direction end (ear), 6 ... Rubber lug.

Claims (1)

[Claims] 1. A rubber lug is embedded on an outer peripheral surface of an endless rubber elastic body by embedding a large number of cored bars in an endless rubber elastic body at regular intervals, and by embedding a tensile body row A surrounding the cored bar. Which is formed on the outer peripheral surface side of the tensile body row A enclosing the cored bar at the widthwise end of the endless rubber elastic body from which the cored bar is removed. A structure of a rubber crawler in which row B is buried.