JP2000006858A - Rubber crawler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent crack formation and to hinder a lug from being cut by forming the lateral width of a core metal embedded in a cross direction to the travel direction of a rubber crawler, almost the same as the lateral width of the rubber crawler. SOLUTION: A core metal 1 is embedded in rubber 2, and the lateral ends 1A of the core metal 1 are made almost the same as the lateral width direction of a rubber crawler so as to form a rubber part 2A with a thickness of about 2 mm. Steel cords are embedded outside of blade parts 1B of the core metal 1. Angular parts 1C are protruded from the inner peripheral surface of the rubber crawler, and rubber lugs are formed on the outer peripheral side. Recesses 1D are formed at the lateral ends 1A of the core metal 1. The rubber quantity is increased by the portion of these recesses 1D. Separation between the core metal 1 and the rubber 2 is therefore impeded. The width of the lug part 3 of the rubber crawler is markedly narrow in the rubber part 2A so as to be prevented from bending even in the case of running up on a protrusion on the road surface. A crack is not therefore formed.

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 the relationship between a rubber crawler base and a core metal.

[0002]

2. Description of the Related Art In endless rubber crawlers and pad crawlers for iron shoes (hereinafter collectively referred to as "crawlers"), a metal core is buried in the width direction. In such a conventional crawler, a rubber portion having a considerable width exists between a widthwise end of the cored bar and a widthwise end of the crawler.

FIG. 1 is a cross-sectional view of an example of a rubber crawler. Reference numeral 1 denotes a cored bar, 2 denotes a rubber elastic body that covers the cored bar and serves as a base of the rubber crawler. The so-called ear portion 3 between the end portion 2A is only a rubber portion. FIG.
FIG. 3 is a cross-sectional view when the rubber crawler travels on the protrusion 4 on the road surface, and travels in a state where the rubber claw ear 3 is bent by the protrusion 4.

As a result, the rubber of the ear 3 is sandwiched between the projection 4 and the end 1A of the core 1, so that a crack c is generated mainly toward the end 1A of the core 1. That is, in the conventional rubber crawler, since there is an ear portion 3 composed of only the rubber portion, a crack c occurs when the ear portion 3 is bent, and finally, the ear portion 3 is bent. 3 will be cut off.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to improve such a drawback, and mainly specifies the widthwise dimensions of a cored bar and a crawler to prevent the occurrence of cracks, In order to prevent the disconnection.

[0006]

A first aspect of the present invention is a rubber elastic body constituting a rubber roller base, a core metal buried in the width direction with respect to the running direction of the rubber roller, and the rubber. A rubber crawler comprising a rubber lug formed on an outer peripheral surface of an elastic body, wherein a right and left width of the core bar is substantially equal to a right and left width of the rubber crawler.

[0007] A second aspect of the present invention is a rubber elastic body constituting a base of the pad crawler, a metal core embedded in the width direction with respect to the running direction of the pad crawler, and a rubber elastic body of the rubber elastic body. A pad crawler comprising a rubber lug formed on an outer peripheral surface, characterized in that the right and left widths of the core bar are substantially the right and left widths of the pad crawler. -The width is approximately the front and rear width of the la.

In each case, one or a plurality of recesses are provided at the left and right ends of the core bar, and in some cases, it is preferable to provide a recess at the front and rear width ends of the core bar.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In the crawler of the present invention, the left and right ends of a metal core embedded in a rubber elastic body are extremely close to the left and right widthwise ends of the crawler. For this reason, the lug portion formed only of the rubber portion as in the conventional crawler is eliminated. In other words, a relatively thin rubber portion, for example, rubber of about 2 to 10 mm is put on the end of the core between the left and right ends of the core and the left and right ends of the crawler. Even when the horn rides on the projection, there is no pinching unlike the conventional ear portion, so that a crack heading toward the end of the cored bar is prevented.

[0010] Then, 2-10
Since the rubber part of about mm is provided, peeling and rusting of the core metal and the rubber part do not occur. Further, if recesses are provided in the left and right end portions of the metal core, and in some cases in the front-rear direction, rubber chipping and exposure of the metal core are less likely to occur. The dent provided at the end of the metal core may be a hole as well as the dent.

[0011]

The present invention will be described in more detail below with reference to preferred examples of the crawler of the present invention. FIG. 3 is a plan view of an inner peripheral side of a rubber crawler according to a first embodiment of the present invention, and FIG. 4 is a cross-sectional view in a lateral width direction. In the drawing, reference numeral 1 denotes a metal core, 2 denotes a rubber elastic body serving as a base of a rubber crawler, and a metal core 1 is embedded in a rubber 2; Rubber section 2A approximately the same as the width direction and about 2 mm thick
Is formed. A steel cord 5 is embedded outside the wing 1B of the metal core 1, and a corner 1C protrudes from the inner peripheral surface of the rubber crawler. In addition, a rubber lug 6 is provided on the outer peripheral side.
Are formed.

In this example, a dent (dent) 1D is formed at the left and right end portions 1A of the core 1 so that the amount of rubber increases by the amount of the dent 1D, and the separation between the core 1 and the rubber 2 occurs. Will be blocked. Since the width of the rubber portion 2A is significantly smaller than the width of the conventional rubber claw ear portion 3, the rubber portion 2A does not bend even when it rides on a protrusion on a road surface, so that no crack is generated. Note that this example is an example in which a recess 1E is also formed at the front and rear ends of the cored bar 1.

FIGS. 5 to 7 show a second pad cloth according to the present invention.
5 is a plan view on the outer peripheral side of the pad crawler, FIG. 6 is a cross-sectional view in the left-right width direction, and FIG. 7 is a cross-sectional view in the front-rear width direction. In this example, the metal core 1 constitutes a surface to be mounted on an iron shoe (not shown). The metal core 1 is surrounded by rubber 2, and the rubber lug 6 is substantially attached to the metal core 1. It is formed correspondingly. A bolt insertion hole 7 is provided continuously with the metal core 1 and is used for mounting to a plate on the iron shoe side. The left and right ends 1A of the metal core 1 are covered with a rubber portion 2A having a thickness of 2 mm.

Also in this example, a recess (hole) 1D is formed in the left and right end portions 1A of the metal core 1, and the rubber inside and outside the metal core 1 is connected by the hole 1D, so that the metal core is formed. The separation between 1 and rubber 2 is prevented. Since the width of the rubber portion 2A is significantly narrower than that of a conventional pad crawler, the rubber portion 2A does not bend even when it rides on a protrusion on a road surface, so that no crack is generated.

FIGS. 8 to 10 show another example of the second pad crawler according to the present invention. FIG. 8 is a plan view of the outer periphery of the pad crawler, and FIG. FIG. 10 shows the front-rear width direction. In this example, a recess 1E is also formed at the end of the front and rear width of the cored bar 1. The amount of rubber is increased by the amount of the recessed 1E, and peeling between the cored bar 1 and the rubber 2 is prevented.

[0016]

According to the present invention, since there is no ear formed only of rubber at the widthwise end of the cored bar, cracks or cuts do not occur in this portion, and As a result, the life of the device is extended.

[Brief description of the drawings]

FIG. 1 is a half cutaway view of an example of a conventional rubber roller.

FIG. 2 is a half cut diagram showing a state in which the rubber crawler shown in FIG. 1 rides on a protrusion on a road surface.

FIG. 3 is a half plan view of an inner peripheral side of a rubber roller according to a first embodiment of the present invention.

FIG. 4 is a half sectional view of the rubber crawler of FIG. 3 in a width direction.

FIG. 5 is a plan view of an outer peripheral side of a pad roller according to a second embodiment of the present invention.

6 is a cross-sectional view of the pad crawler of FIG. 5 in the left-right width direction.

7 is a cross-sectional view of the pad crawler of FIG. 5 in the front-rear width direction.

FIG. 8 is a plan view of an outer peripheral side of another example of the pad crawler showing the second embodiment of the present invention.

9 is a cross-sectional view of the pad crawler of FIG. 8 in the left-right width direction.

FIG. 10 is a cross-sectional view of the pad crawler of FIG. 8 in the front-rear width direction.

[Explanation of symbols]

 1 ‥ core, 1A ‥ left and right ends of the core, 1B ‥ core wing, 1C ‥ corner of the core, 1D, 1E ‥ dent at the end of the core, 2 ‥ rubber crawler base Rubber elastic body, 2A rubber part formed at the end of the core bar, 3 claw ear, 4 protrusion, 5 steel cord, 6 rubber lug, 7 bolt insertion hole C crack.

Claims (7)

[Claims] 1. A rubber elastic body constituting a rubber roller base, a core metal buried in a width direction with respect to a running direction of the rubber crawler, and a rubber lug formed on an outer peripheral surface of the rubber elastic body. Wherein the left and right widths of the cored bar are substantially the right and left widths of the rubber crawler. 2. The rubber crawler according to claim 1, wherein one or a plurality of recesses are provided at left and right widthwise ends of said cored bar. 3. The pad crawler according to claim 1, wherein one or a plurality of recesses are provided at widthwise ends of said core bar in the front-rear direction. 4. A rubber elastic body constituting a base of the pad crawler, a metal core embedded in a width direction with respect to a running direction of the pad crawler, and a rubber elastic body formed on an outer peripheral surface of the rubber elastic body. A pad crawler comprising a rubber lug, wherein a right and left width of a core bar is substantially equal to a right and left width of the pad crawler. 5. The pad crawler according to claim 4, wherein one or more recesses are provided at left and right widthwise ends of said cored bar. 6. The pad roller according to claim 4, wherein the front and rear widths of the core metal substantially correspond to the front and rear widths of the pad roller. 7. The pad crawler according to claim 4, wherein one or a plurality of recesses are provided at widthwise ends of said core bar in the front-rear direction.