Patent ID: 8807311
Filing Date: 2014-08-19
Classification: B66D,F16D

Abstract:
1. A winch brake used with a deceleration clutch mechanism and installed with said deceleration clutch in a winch comprising at least, a motor and a winch drum, the winch brake comprising: a driving block having one end thereof connected to an output shaft of said motor of said winch and rotatable by said motor and an opposite end thereof provided with two spaced protruding flanges; a driven block having one end disposed remote from said driving block and connected to a transmission shaft of said deceleration clutch mechanism for synchronous rotation and an opposite end thereof provided with two spaced protruding flanges; a brake spring mounted between said driving block and said driven block, said brake spring having at least one retaining end portion disposed at each of two opposite ends thereof and respectively engaged into gaps between the two protruding flanges of said driving block and gaps between the two protruding flanges of said driven block for enabling said brake spring to be driven by one of said driving block and said driven block to contract or to expand; a brake bush accommodating said driving block, said driven block and said brake spring, said brake bush having an inner perimeter for friction contact with an outer perimeter of said brake spring when said brake spring is driven to expand; and a one-way bearing fixedly mounted in said winch around said brake bush to limit rotation of said brake bush in a first direction.