| 主权项 |
1. A disc brake, comprising a friction pad, a piston, a thrust nut, a ball and a thrust shaft orderly connected from left to right, wherein the disc brake further comprises a brake housing that sheathes the piston and the thrust nut, an outer surface of the thrust nut directly contacts an inner wall surface of the brake housing, the outer surface of the thrust nut is provided with at least one protruded portion, the inner wall surface of the brake housing is provided with a groove matched with the protruded portion, and the thrust nut is only axially movable in the brake housing;
wherein a parking lever is connected to the thrust shaft, the parking lever includes a flat plate with an edge having a bent portion for connecting to a parking cable, the bent portion being directly connected to the edge of the flat plate, one end of the thrust shaft being located in the flat plate, and the flat plate being perpendicular to an axis of the thrust shaft; wherein a screw is provided below the thrust shaft and fixedly connected to the brake housing, a torsion spring is provided below the parking lever for resetting the parking lever, one end of the torsion spring is fixedly connected to the screw, and the other end of the torsion spring is fixedly connected to the parking lever; and wherein the bent portion of the upper plate is located at an upper portion of the flat plate, an opening is provided at a lower portion of the flat plate, the torsion spring sheathes the screw, and wherein the screw extends through the opening of the lower portion of the flat plate. |
