| 摘要 |
A hand brake for manually actuating brake cylinders, particularly for an air braking system on railway vehicles, has a piston tube extending from the piston of a brake cylinder and an actuating rod connected to the brake linkage positioned within the piston tube. A device for adjusting the actuating rod with respect to the piston tube device comprises a thrust ring acting upon a portion of the piston tube. A brake ring is positioned around the piston tube and is rotatable by a manually actuated drive. Wedge gear displacing means are provided to displace axially the brake ring upon rotation of the brake ring. An intermediate element is connected to the piston tube and is displaced by the brake ring during axial displacement of the brake ring. The piston tube has a cam portion acting upon the thrust ring so as to displace the actuating rod axially upon axial displacement of the piston tube. |
