Pneumatic actuator double with automatic recovery of the sets for brakes of the rail, 2004.

摘要

P pneumatic actuator for brakes of the rail vehicles, comprising two opposed pistons (3) each of which is associated with a respective pusher (6) which can be advanced to the control of the brake pads of a respective wheel, and each of which is provided with a respective disspositif (11) for automatically taking up play, due to wear of the brake pads. The actuator is provided with an emergency braking device or of the parking (12), constituted by a cam (13) is interposed between the two pistons (3) and having an active profile double (13a, 13b) which cooperates with two opposite surfaces of these pistons. The cam (13) is mounted on a shaft (14), which can rotate about an axis perpendicular to the direction of advance of the pushers (6) between an angular position which is inactive and an angular position of the cam (13), and which can be controlled by means of an oscillating lever outside (17). / p