JP2001055180A - Core metal for rubber crawler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively prevent pitching and surely suppress separation of a core metal buried in a rubber crawler. SOLUTION: In this core metal 2 for a rubber crawler buried in a lengthwise direction of the rubber crawler 1 with a prescribed space apart to be laterally mounted in a width direction to be formed with rolling wheel running surfaces 5L, 5R with almost the same level to an internal peripheral surface of the rubber crawler 1 in both sides of a sprocket engaging part 4 in the central part and to have wing parts 2L, 2R extended in a width direction to the right/ left of these rolling wheel running surfaces 5L, 5R, the roller ring running surface 5L, 5R is extended like a surface 9R in one lengthwise direction of the rubber crawler 1, and corresponding to this extension, the wing part 2R is also extended like a width (10R). In this way, by making a width spread part capable of surely receiving a total load of a roller ring, the roller ring can be stably rolled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber crawler core bar having a sprocket engagement portion and a wheel running surface formed therein and embedded at a predetermined interval in a longitudinal direction of the rubber crawler.

[0002]

2. Description of the Related Art A driving sprocket engages with a sprocket engaging portion formed at a center portion in the width direction of a rubber crawler core bar buried at a predetermined interval in a longitudinal direction of a rubber crawler. A so-called core metal buried type rubber track of a type in which wheels roll on rolling wheel running surfaces formed on both left and right sides of a section is widely used. As shown in FIG. 4A, this type of core metal buried rubber crawler has a rubber crawler (not shown) formed on the left and right sides of a sprocket engagement portion 14 at the center of the core metal 12, as shown in FIG. One wheel running surface 15L, 15R is formed. Then, in order to realize a smooth transfer of the rolling wheels between the adjacent metal cores buried at a predetermined interval in the longitudinal direction of the rubber track, the rolling wheel running surfaces 15L and 15R are respectively connected to the rubber tracks. Extending portions 9L and 9R are formed extending in the longitudinal direction. As in the illustrated example, the left and right extending portions 9L, 9
The Rs extend in opposite directions in the longitudinal direction of the rubber track and are arranged in a staggered manner. By such a measure, the rolling wheels rolling on the rolling wheel running surfaces 15L and 15R can smoothly connect the rolling wheels between the adjacent metal cores.

[0003]

However, in such a case where the rolling wheel running surface 15 is extended in the longitudinal direction of the rubber crawler to form the extended portion 9 as shown in FIG. 4B, When the extended portion 9 of the rolling wheel running surface 15 is rolled, the core metal 12 exhibits a pitching behavior with the leading edge or the trailing edge of the wing portion 12L or 12R of the core metal 12 as a fulcrum, and the vibration of the rubber crawler. In addition to causing noise and generating noise, there is also a risk that core metal may be peeled off in the rubber track.

Accordingly, the present invention solves the above-mentioned problems of the conventional rubber crawler core metal, and effectively prevents the core metal from being pitched in the embedded rubber crawler, and also reliably suppresses the possibility of peeling. An object of the present invention is to provide a core metal for a rubber track.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a rubber crawler core bar which is buried at a predetermined interval in the longitudinal direction of the rubber crawler and is laid horizontally in the width direction. Roller running surfaces substantially flush with the inner peripheral surface of the rubber crawler are formed on both sides of the portion, and a rubber crawler core metal having wings extending in the width direction on the left and right of these wheel running surfaces. The rolling wheel running surface extends in one of the longitudinal directions of the rubber track, and the wings are also widened correspondingly. Further, the present invention is characterized in that the widened portion of the wing portion is formed over the entire width direction. Further, the present invention is characterized in that a concave portion is formed between the wheel running surface and the wing portion in the thickness direction. The present invention also provides
The extended portion of the wheel running surface is extended in opposite directions on the left and right. Further, the present invention is characterized in that a guide projection is formed between the sprocket engagement portion and the wheel running surface, and these are used as means for solving the problem.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show an embodiment of a rubber crawler core according to the present invention. FIG. 1 (A) is an overall perspective view of the core, and FIG. 1 (B) is A in FIG. 1 (A). 2A is an overall plan view of the cored bar, FIG. 3A is an overall front view of the cored bar, and FIG. 3B is a view taken in the direction of arrow B in FIG. 3A. As shown in FIG. 1 (A), a metal core 2 buried at a predetermined interval in the longitudinal direction of the endless belt-shaped rubber crawler and laid laterally in the width direction has a sprocket engaging portion 4 at a central portion and both sides thereof. The left and right wheel running surfaces 5L, 5R are formed substantially flush with the inner peripheral surface of the rubber crawler, and a sprocket (not shown) is engaged with the sprocket engaging portion 4, and the rolling wheels arranged on the left and right sides of the sprocket. The wheels roll on the wheel running surfaces 5L, 5R. FIG. 1B is a cross-sectional view taken along line AA of FIG.
Is embedded, and the upper surfaces of the wheel running surfaces 5L and 5R are substantially flush with the inner peripheral surface of the rubber crawler 1. In addition,
The core metal 2 may be embedded in the rubber crawler 1 in such a manner that a slight rubber crawler layer exists on the upper surfaces of the rolling wheel running surfaces 5L, 5R.

On the left and right sides of these wheel running surfaces 5L, 5R, one
The wings 2L, 2R extend outward in the width direction at a lower position to form a core metal main body. The left and right wheel running surfaces 5
As shown in FIG. 1 (B), one of the rubber crawlers 1 in the longitudinal direction at L and 5R is extended by a length L to form an extended portion 9.
L, 9R, and correspondingly, the wings 2L, 2R are also widened to widen the widened portions 10L (below 9L),
OR is formed. Preferably, the widened portions 10L, 10R in the wing portions 2L, 2R are formed over the entire width direction. As shown in FIG.
A concave portion 8 is formed between R and the wing portion 2R in the thickness direction,
The rubber in the rubber track 1 is filled in the concave portion 8. It is needless to say that the concave portion 8 may be formed not only on the extension portions 9L and 9R side but also on the side having no extension portion.

As is well understood from the plan view of the cored bar 1 shown in FIG. 2, it is preferable that the extended portions 9 of the wheel running surfaces 5L, 5R be provided.
L and 9R extend in opposite directions on the left and right, and are arranged in a staggered manner. The sprocket engaging portion 4 and the wheel running surface 5
The guide projections 3L, 3R are formed between the first and second guide projections 3L, 5R.
The right and left sides also extend in opposite directions and are arranged in a staggered manner. Reference numerals 6L and 6R denote wheel running surfaces 5L, 5L.
R shows an overhanging running surface formed so as to extend outward in the width direction substantially flush with these. And it connects to wing parts 2L and 2R by reinforcement ribs 7L and 7R, respectively. These overhanging running surfaces 6L and 6R can effectively prevent the inner peripheral surface of the rubber crawler 1 from being damaged even when the rolling wheels are displaced from the rolling wheel running surfaces 5L and 5R.

FIG. 3 is an overall front view of the cored bar and a view on arrow B of the right half thereof, and the right half of FIG.
The left half shows the non-extended portion side. According to these figures, the sprocket engaging portion 4, the guide protrusion 3, the rolling wheel running surface 5, the height related configuration of the overhanging running surface 6, the guide protrusion 3, the rolling wheel running surface with respect to the sprocket engaging portion 4. 5 and the wing portion 2 clearly show the related configuration of the extended portion 9 and the widened portion 10 in the length direction of the rubber crawler 1 (the left-right direction in FIG. 3B). With such a configuration, the rolling wheel running surfaces 5L, 5R are embedded in the rubber crawler at a predetermined interval in the longitudinal direction so as to realize smooth transfer of rolling wheels between the core metals adjacent to each other. Are respectively extended in the longitudinal direction of the rubber crawler to form extended portions 9L and 9R.
Is formed, the wings are also widened correspondingly, so the extended rolling wheel running surfaces 5L, 5R
The rolling wheel can stably roll on the top, and the core metal 2
There is no pitching behavior as a whole, and no noise is generated by causing the rubber track 1 to vibrate. Therefore, the possibility that the core metal 2 is peeled off in the rubber track 1 is also eliminated.

Although the embodiments of the present invention have been described in detail above, the shape of the rubber crawler,
Form, embedding form and material of the core, shape of wing, shape of guide projection, shape of sprocket engaging part (in addition to cylindrical shape as shown in the figure, a hole for sprocket engagement is drilled on the core metal side The shape of the wheel running surface, the shape of the concave portion, the shape of the extended portion and the widened portion, and the like can be appropriately selected.

[0011]

As described above in detail, according to the present invention, there is provided a rubber crawler core bar which is buried at a predetermined interval in the longitudinal direction of the rubber crawler and is laid horizontally in the width direction. For a rubber crawler having a wheel running surface substantially flush with the inner peripheral surface of the rubber crawler on both sides of the sprocket engaging portion and having wings extending in the width direction to the left and right of the wheel running surface. In the cored bar, the rolling surface is extended in one of the longitudinal directions of the rubber crawler, and the wings are also widened correspondingly. Even when the rolling wheel rolls on the running surface of the rolling wheel that is extended to realize the transfer, the widened portion in the wing portion can reliably receive the entire load of the rolling wheel, so that it is stable. It is possible to make the rolling of the rolling wheel There can not be that indicate a pitching behavior generates vibration and noise of the rubber crawler, risk is also eliminated to cause separation of the metal core in the rubber track.

In the case where the widened portion of the wing portion is formed over the entire width direction, the widened portion of the wing portion receives the entire load of the rolling wheel over the entire width direction with a small surface pressure. More stable and stable behavior of the cored bar in the inside is obtained. Further, when a concave portion is formed between the wheel running surface and the wing portion in the thickness direction, the rubber portion of the rubber crawler is filled in the concave portion, so that the connection between the core metal and the rubber crawler is more reliably performed. As a result, the function of preventing the core metal from pitching with respect to the rubber track is improved, and the fear of peeling is eliminated.

Further, when the extending portions of the wheel running surfaces extend in opposite directions on the left and right, the staggered arrangement of the wheel running surfaces makes the connecting of the wheels even smoother. . When a guide projection is formed between the sprocket engagement portion and the rolling wheel running surface, the rolling function of the rolling wheel on the rolling wheel running surface is more appropriately performed by the guide function of the sprocket and the rolling wheel. be able to. Thus, according to the present invention, there is provided a rubber crawler core bar in which pitching of the core bar in the embedded rubber crawler can be effectively prevented, and the fear of peeling can be surely suppressed.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of a rubber crawler core of the present invention. FIG. 1 (A) is an overall perspective view of the core, and FIG. 1 (B).
FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 2 is an overall plan view of the same core bar.

FIG. 3A is an overall front view of a cored bar, and FIG.
(B) is a view on arrow B in FIG. 3 (A).

FIG. 4 is a plan view of a conventional rubber crawler core bar and a side view showing its behavior.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rubber crawler 2 Core metal 2R Right wing part 2L Left wing part 3 Guide projection 4 Sprocket engagement part 5 Wheel running surface 6 Overhanging running surface 7 Reinforcement rib 8 Depression 9 Extension part 10 Widening part

Claims (5)

[Claims] 1. A rubber crawler core bar buried at a predetermined interval in a longitudinal direction of a rubber crawler and laid in a width direction thereof, the inner peripheral surface of the rubber crawler being provided on both sides of a sprocket engaging portion at a central portion. And a rubber crawler core having wings extending in the width direction to the left and right of the wheel running surface, the wheel running surface of the rubber crawler is formed. While extending in one of the longitudinal direction,
The core metal for a rubber crawler, wherein the wings are also widened correspondingly. 2. The rubber crawler core according to claim 1, wherein the widened portion of the wing portion is formed over the entire width direction. 3. The rubber crawler core according to claim 1, wherein a recess is formed between the wheel running surface and the wing portion in a thickness direction. 4. The rubber crawler core according to claim 1, wherein the extending portions of the wheel running surface extend in left and right directions opposite to each other. 5. The rubber crawler core according to claim 1, wherein a guide projection is formed between the sprocket engagement portion and the wheel running surface.