| 摘要 |
A caterpillar is provided to extend the life span of a bushing by reducing the torsion stress generated in the bushing in a location where being driven by a drive sprocket, thereby extending the life span of the caterpillar. A caterpillar includes a shoe assembly(10) and an end connector assembly(20). The shoe assembly has a shoe body(11) with a pin hole(11a), a pad(12) assembled at a lower part of the shoe body, a pin(14) having a bushing(14a) and an installing unit(14b) and pressed into the pin hole, and a lower guide cap(18a) preventing the separation of the caterpillar. The end connector assembly has an end connector(21) connecting the shoe assembly, a wedge nut(23) inserted into the end connector and contacted to the installing unit, and a bolt(25) coupled with the wedge nut. The adjacent shoe assembly has an initial refraction angle, and is connected by the end connector assembly in an initial state in which external force is not applied.
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