JPH08133144A - Rubber crawler - Google Patents

Abstract

PURPOSE: To provide a rubber crawler improving its torsional rigidity further to prevent laterally displacing a core metal. CONSTITUTION: In a rubber crawler formed with a rubber elastic unit 1, core metal 2 arranged in a horizontal position, steel cord train 5 and a rubber lug 4, the rubber crawler is formed by arranging a bias cord train 6 at a fixed angle relating to the lengthwise direction of this rubber crawler to partition into each one or each plurality of blade parts relating to the blade part 22 of each core metal 2 the bias cord train 6 arranged alternately in inner/outer surface sides of the rubber crawler. In the rubber crawler, the blade part of the core metal is alternately locked by the bias cord train, and the rubber crawler excellent in wheel dislocatability, preventing twisting the rubber crawler also to imede displacing the core metal in a lateral direction, can be provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber crawler which improves the torsional rigidity of a rubber crawler and prevents lateral displacement of a core bar.

[0002]

2. Description of the Related Art In recent years, rubber crawlers have been widely used in the running parts of construction machines and civil engineering work machines, and the running conditions thereof have become more severe than those used in the running parts of agricultural machinery. Since the rubber crawler is wound around the idler and the sprocket and used for traveling, a large tension is applied. For this reason, a steel code row is embedded in the rubber elastic body in the longitudinal direction thereof. The driving force from the sprocket is likewise transmitted to the cored bar embedded in the rubber elastic body, and the cored bar also serves as the engagement with the track roller.

However, the core metal and the steel cord row are similarly embedded in the rubber elastic body, but the ordinary rubber crawlers do not provide a means for supporting the two, but simply the steel.
The rucode row is only embedded in the rubber elastic body in a state of surrounding the cored bar, and depends on the elastic force of the rubber elastic body.

Therefore, when the rubber crawler runs on a steep slope or runs on a convex portion of the running surface, a large external force is applied in the width direction of the rubber crawler. For this reason, it is inevitable that the rubber crawler itself will be twisted or the cored bar to which an external force is applied will be displaced laterally, which causes the rubber crawler to engage with the sprocket or track roller. It will be out of sync and you will be derailed.

[0005]

Recently, there are some large-sized rubber crawlers having a weight of several hundreds of kilograms, and when these are derailed from the running part during work, they are refitted to the proper positions. It requires a long time, and in this respect, there has been a demand for improvement as a structural problem of the rubber crawler. The present invention has been made in view of this demand, and provides a rubber crawler which prevents lateral displacement of the cored bar and at the same time improves twisting of the rubber crawler.

[0006]

DISCLOSURE OF THE INVENTION The gist of the present invention is to provide an endless rubber elastic body, a metal core horizontally arranged in the rubber elastic body with a constant pitch in the longitudinal direction, and a longitudinal direction. A arranged rubber cord row and a rubber crawler in which a rubber lug is formed on the outer peripheral surface of a rubber elastic body,
Bias code rows arranged at a constant angle with respect to the longitudinal direction of the rubber crawler are divided into one or a plurality of wing portions for each wing portion of each core bar, and the inner and outer surface sides of the rubber crawler are separated. The present invention relates to a rubber crawler which is characterized by being arranged alternately.

The bias cord row used is made of synthetic fiber or steel cord, and may be a woven cord in some cases, and may be a longitudinal direction of the rubber crawler. It is preferable that the bias angle of the bias code train is 5 to 45 degrees.

[0008]

According to the present invention, the blades of the cored bar embedded in the rubber elastic body are staggered on the inner and outer surface sides of the rubber crawler, in addition to the steel cord row which counters the tension in the longitudinal direction of the rubber crawler. By using the constraining bias cord row, it is intended to constrain the core metal to prevent lateral displacement and also reduce the occurrence of twisting of the rubber crawler.

The row of bias cords for restraining the core metal inside and outside may be a textile cord, a Kevlar cord, a steel cord or the like, or a woven one thereof. Also has an inclination angle of 5 to 45 degrees with respect to the longitudinal direction of the rubber crawler, and such a bias code row can follow the local bending and twisting of the rubber crawler. Because.

The bias cord row is usually a band-shaped one in which unvulcanized rubber is pressure bonded to the upper and lower surfaces of the bias cord row. It is common that the rubber black
At the time of vulcanization molding of la, the blades of the cored bar are alternately constrained to the inner and outer surface sides and set in the mold. The blades of the cored bar of the bias cord row can be constrained not only by alternately constraining the blades of the adjacent cored bar but also by constraining a plurality of blades together. Further, although the left and right wings of the core bar can be similarly restrained, the left and right wings can be arranged to change the restraint.

[0011]

The present invention will now be described in more detail with reference to the drawings. 1 is a partially exploded plan view of the inner circumference of a first embodiment of a rubber crawler of the present invention, and FIG. 2 is a sectional view taken along line AA of FIG. In the figure, 1 is a rubber elastic body, and 2 is a cored bar arranged at a constant pitch. Further, 3 is a sprocket hole, and 4 is a rubber lug formed on the outer peripheral surface of the rubber elastic body 1.

The central portion 2 _{0 of the} core metal 2 serves as an engaging portion with the sprocket, and on the left and right sides thereof, the wing portions 2 ₁ and 2 ₂ embedded in the rubber elastic body 1 and the inner peripheral surface of the rubber crawler. A pair of more protruding protrusions 2 ₃ and 2 ₄ are formed.
The wings 2 ₁ of the core metal 2, 2 ₂ of the outer peripheral side responsible tension steel - Turkey - de column 5 Gomukuro - are embedded toward the longitudinal direction of the La.

Now, in the bias code row 6 made of a steel code, in this example, the blade portions 2 of the cored bars 2 and 2 adjacent to each other are provided.
Alternately restrained ₁ , 2 ₂ on the inner and outer circumferences.
As can be seen from the figure, it is preferable that the bias code rows 5 embedded on the left and right have the right and left angles reversed.
If they are oriented in the same direction, the rubber roller may be twisted in some cases.

FIG. 3 is an enlarged view of the bias code train 6. This vertical unvulcanized Gomushi - Baiasuko between bets 7,8 - de 6 ₀ be those that are sandwiched in rows like, those obtained by superimposing these three so-called bias cutter - at It is made by cutting 9. In the figure, θ
The Baiasuko - is the angle of de 6 _0, this is Gomukuro -
5 to 45 degrees with respect to the longitudinal direction of the la, preferably 5 to 3
0 degree is good. If this is 5 degrees or less, the winding resistance becomes large, which is not very preferable. On the other hand,
If it is 45 degrees or more, the effect of restraint becomes small.

FIG. 4 is a sectional view similar to FIG. 2, showing a second embodiment of the rubber crawler of the present invention. In this example, the bias code row 6 has a structure in which the blade portions 2 ₁ , 2 ₂ of the cored bar 2 adjacent to each other are divided into two and constrained alternately on the inner and outer peripheral sides.

FIG. 5 is a plan view showing the relationship between the cored bar 2 and the bias code row 6 showing the third embodiment of the rubber crawler of the present invention. In this example, the blade portions 2 of the adjacent cored bars 2 are shown. ₁ , 2 ₂
Are alternately restrained by the steel cord rows 6 on the left and right.

[0017]

The present invention is a rubber crawler having the above construction, in which the blade portions of the cored bar are alternately restrained by a bias code row, and the twisting of the rubber crawler is prevented and the core is It was possible to provide a rubber crawler having excellent derailment properties, which also prevented lateral displacement of gold.

[Brief description of drawings]

FIG. 1 is a partially exploded plan view of an inner circumference of a first embodiment of a rubber crawler of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is an enlarged view of a bias code train.

FIG. 4 is a sectional view similar to FIG. 2, showing a second embodiment of the rubber crawler of the present invention.

FIG. 5 is a plan view showing a relationship between a core bar and a bias code row showing a third embodiment of the rubber crawler of the present invention.

[Explanation of symbols]

1 ‥‥ rubber elastic body, 2 ‥‥ cored bar, 3 ‥‥ sprocket holes, 4 ‥‥ Gomuragu, the central portion of the 2 ₀ ‥‥ core metal (engagement with the sprocket), _{2 1,} 2 2 ‥‥ core wings of gold, 2 _3, 2 ₄ ‥‥ pair of projections of the core, 5 ‥‥ steel - Turkey - de train, 6 ‥‥ Baiasuko - de train, 6 ₀ ‥‥ Baiasuko - de, 7, 8 ‥‥ Unvulcanized rubber sheet.

Claims (4)

[Claims] 1. An endless rubber elastic body, a cored bar horizontally arranged in the rubber elastic body at a constant pitch in the longitudinal direction, and a steel cord row arranged in the longitudinal direction. , A rubber crawler in which a rubber lug is formed on the outer peripheral surface of a rubber elastic body, and a bias code row arranged at a constant angle with respect to the longitudinal direction of the rubber crawler is attached to the blade of each core bar. The rubber crawler is characterized in that it is divided into one or a plurality of wings and arranged alternately on the inner and outer surfaces of the rubber crawler. 2. The rubber crawler according to claim 1, wherein the bias cord row is made of synthetic fiber or steel cord. 3. A rubber crawler according to claim 1, wherein the bias cord row comprises a woven cord. 4. The rubber crawler according to claim 1, wherein the bias angle of the bias code row with respect to the longitudinal direction of the rubber crawler is 5 to 45 degrees.