Device for automatically compensating lining abrasion stroke of hand brake

The invention relates to a device for automatically compensating a lining abrasion stroke of a hand brake. The device comprises a body unit, a first lining unit, a second lining unit, a compensation unit and a rotary positioning unit, wherein the first lining unit and the second lining unit are arranged between a brake disc and the body unit; the compensation unit comprises a braking piece, a screw piece connected to the braking piece in an abutting mode and a threaded sleeve piece screwed to the screw piece; the braking piece can provide vibration for the screw piece under the action of external force; the threaded sleeve piece rotates relative to the screw piece; the threaded sleeve piece pushes the first lining unit to automatically compensate the lining abrasion stroke towards the brake disc; and through the rotary positioning unit, the pivoting friction can be reduced, and the threaded sleeve piece can be prevented from rotating reversely so as to ensure the automatic compensation effect. 一种手刹车自动补偿来令磨耗行程