AUTOMATIC PARKING BRAKE OF RAILWAY VEHICLE AND ITS SHUTDOWN ASSEMBLY Russian patent published in 2020 - IPC B60T17/08 B60T13/68 B61H11/02 

FIELD: machine building.

SUBSTANCE: group of inventions relates to an automatic parking brake, which comprises a brake cylinder, the rod of which is pivotally connected to the brake lever transmission, and a unit for fixation of the brake cylinder rod. Fixation assembly includes a spring-loaded control piston, which forms a sealed controlled cavity and an atmospheric cavity in the body. Piston senses difference between oppositely directed forces from spring and pressure in controlled cavity. In the control piston body, there is a conical nut moving along the hollow screw with a nonlocking thread. In normal mode of operation hollow screw moves together with rod of brake cylinder. Hollow screw is stopped by means of a cone nut forming a friction pair with a stopping counterbody without pressure in the controlled cavity. Automatic parking brake disengagement assembly is installed in atmospheric cavity and is made with possibility of interaction in working condition with hollow screw for fixation in initial position. Disconnection unit comprises a captive bolt fixed in the housing by means of a retaining ring.

EFFECT: improving reliability of automatic parking brake and its disconnection unit.

12 cl, 3 dwg