JPS5795274A - Endless belt for crawler - Google Patents

Abstract

PURPOSE: To prevent the separation of joint surface between cord layers and a core bar by a constitution wherein the contact surface of the core bar to the bottom face of a sprocket is made nearly flush with the cord layers.

CONSTITUTION: The driving direction of the sprocket A and the direction of resistance force of cords B can lie nearly flush with each other by placing the contact surface 6a of the core bar 6 to the bottom face of the sprocket nearly flush with the cord layers 7 and as a result the moment is not generated between the directions A and B and the abnormally tilt condition of the core bar 6 is prevented from generating and the local bending stress concentration of the cord layers is eliminated and the problem of fatigue break of the cord layers is solved. Because there is no slip of a sprocket tooth 3a against the core bar 6, the wear of the core bar 6 can be decreased and the tight engagement of the tooth 3a with the core bar 6 is obtained at all times. Accordingly, the generation of abnormal separation force at the joint surface beween the core bar 6 and the code layers 7 can be prevented.

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