JPH08216943A - Rubber crawler for construction machine - Google Patents

Abstract

PURPOSE: To increase rigidity of a rubber crawler and to improve dislocation resistance by a method wherein hook-form protrusions interfering with each other in both in a horizontal direction and a vertical direction are formed on the cores of front and rear rubber crawler in an advancing direction. CONSTITUTION: The rubber crawler of a construction machine, such as a hydraulic shovel, is formed in such a manner that protrusion parts 4a and 4b are formed at the front and the rear parts of a core 1 and the protrusion parts 4a and 4b of front and rear cores 1 and 1 are brought into contact with each other to improve rigidity in a horizontal direction. In this case, hook-form protrusions 6a and 6b making contact with each other when the core 1 is pulled in the longitudinal direction of the crawler are formed integrally with the protrusion parts 4a and 4b of the core 1. As noted above, by using the core 1 on which the hook-form protrusions 6a and 6b are formed, the hook-form protrusions 6a and 6b of the core 1 are brought into contact with each other as a result of a rubber crawler A being longitudinally stretched, whereby rigidity in horizontal and vertical directions is improved and dislocation resistance is further improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a rubber crawler for construction machines such as hydraulic excavators.

[0002]

2. Description of the Related Art A conventional rubber crawler A is formed by simply connecting a core metal 1 embedded therein with a steel cord 2 via rubber (FIG. 1). With this structure, the rigidity was very weak and it was easy to derail. As a countermeasure against this, a steel-made bias cord 3 is added as shown in FIG.
Protrusions 4a and 4b are provided on the front and rear of the core metal 1 as
There is one in which the protrusions of the front and rear core bars 1 and 1 are brought into contact with each other to improve the lateral rigidity. But rubber
No particular measures were taken for the elongation of La-A in the front-back direction. For this reason, when the stone 7 is caught in the front idler 5 (Fig. 5) during traveling, the link floats up from the brim of the front idler 5 (Fig. 5 (b)), and if the steering wheel is cut in that state, there is a risk of wheel removal. (Fig. 5 (c)).

[0003]

As described above, a construction machine such as a hydraulic excavator equipped with a rubber crawler has a drawback in that it is easy to derail the wheels, but one of the factors is insufficient rigidity of the rubber crawler. . An object of the present invention is to increase the rigidity of a rubber crawler and thereby improve the derailing performance.

[0004]

[Means for Solving the Problems] In a rubber crawler used for a construction machine or the like, a hook-shaped projection 6a that interferes with the core metal 1 of the rubber crawler before and after the traveling direction in both the lateral direction and the longitudinal direction. , 6b are provided.

[0005]

[Operation] The hook-shaped projections 6a and 6b provided on the core metal 1 interfere with each other,
It is possible to prevent this even if there is a tendency to shift in the front-back or left-right direction.

[0006]

EXAMPLE An explanation will be given with reference to FIG. As shown in FIGS. 1, 2, and 3, the core bar of the conventional rubber crawler A does not have a structure to restrain the tensile load in the front-rear direction of the crawler. Therefore, only the steel cord 2 has a force to suppress the elongation of the rubber crawler A. In this structure, the restraint force against elongation was weak. To solve this problem,
As shown in FIG. 3, the protrusions 4a and 4b of the core metal 1 are provided integrally with hook-shaped protrusions 6a and 6b which come into contact with each other when the core metal 1 is pulled in the front-back direction of the crawler. .

By using the core metal 1 provided with the hook-shaped projections 6a and 6b as described above, the hook-shaped projections 6a and 6b of the core metal 1 come into contact with each other with respect to the elongation of the rubber crawler A in the front-rear direction. Therefore, the rigidity in the horizontal direction can be improved, and the rigidity in the vertical direction can be dramatically improved.

[0008]

[Effect] If the stone 7 (Fig. 5) bites into the front idler 5 during running and the rubber crawler A extends, the height of the brim of the front idler 5 is set larger than the stroke of the recoil spring. However, the link floated from the brim of the front idler 5, and there was a high possibility that the wheel could be derailed if the steering wheel was cut in that state. By using the cored bar 1 of the present invention, it is possible to prevent the link from floating from the brim of the front idler 5, and to further improve the anti-wheel release property against the biting of the stone 7.

[Brief description of drawings]

FIG. 1 is a known rubber crawler.

FIG. 2 is an improved product of the rubber crawler of FIG.

FIG. 3 is also an improved product of the rubber crawler of FIG.

FIG. 4 is a rubber crawler of the present invention.

5A and 5B show a relationship between a rubber crawler and a front idler, where FIG. 5A shows a normal state, FIG. 5B shows a stone clogged, and FIG.

[Explanation of symbols]

 1 core metal 2 steel cord 3 steel cord 4a, 4b protrusion 5 front idler 6a, 6b protrusion 7 stone

Claims (1)

[Claims] 1. A rubber crawler used for a construction machine or the like, in which a hook-shaped projection (6a, 6a, 6a, 6a, 6a, 6b)
A rubber crawler for construction machinery, characterized by being provided with.