| 摘要 |
The invention relates to a spring brake cylinder (1) for brake systems of vehicles, comprising a spring brake piston (2), which is arranged in the housing of the spring brake cylinder (1) and can be actuated by at least one accumulator spring (4) and separates a spring chamber (10) containing the accumulator spring (4) from a spring brake chamber (8) of the spring brake cylinder (1) that can be filled with air for release and can be vented of air for application, wherein a breathing device (12) is provided at least for venting the spring chamber (10) directly into the atmosphere (18). According to the invention, the breathing device (12) is designed as a diaphragm valve device having at least one elastically movable outlet diaphragm (14) and at least one elastically movable inlet diaphragm (16), wherein the inlet diaphragm (16) and the outlet diaphragm (14) are in a closed position in contact with an associated valve seat (20) in the home position of said diaphragms and, when a pressure difference between the spring chamber (10) and the atmosphere (18) exceeding a minimum pressure value is present, said diaphragms are moved into an open position lifted from the valve seat (20) in order to build up and reduce pressure in the spring chamber (10). |
