| 摘要 |
<p>The invention relates to a combined parking brake cylinder (8) and service brake cylinder (19) with slack adjuster (17) for railway vehicles. It comprises a service brake piston (4, 4') and a parking brake piston (9, 9'), applied by a spring (10) and released by pressurisation of the parking brake cylinder (8). A bush (11) engages the parking brake piston (9, 9') by a non-self-locking thread and transmits braking forces therefrom to the service brake piston (4, 4') and to a thrust rod (6). A locking rod (14) engages an internal toothing on the bush (11), fixing it rotationally. To release the parking brake without pressurising the parking brake cylinder (8), the locking rod (14) is disengaged from the internal toothing of the bush (11) thus permitting rotation of the bush (11) and axial movement of the parking brake piston (9, 9') without force transmission to the service brake piston (4, 4') and the thrust rod (6).</p> |
