Spring Brake Cylinder Having Combined Inlet and Outlet Diaphragm Valve

摘要

A spring brake cylinder is provided for brake systems of vehicles. It includes a spring brake piston, which is arranged in a housing of the spring brake cylinder and can be actuated by at least one accumulator spring and separates a spring chamber containing the accumulator spring from a spring brake chamber of the spring brake cylinder that can be filled with air for release and can be vented of air for application. A circulation device is provided at least for venting the spring chamber directly into the atmosphere. The circulation device is configured as a diaphragm valve device having at least one elastically movable outlet diaphragm and at least one elastically movable inlet diaphragm. The inlet diaphragm and the outlet diaphragm are in a closed position in contact with an associated valve seat in the home position of the diaphragms and, when a pressure difference between the spring chamber and the atmosphere exceeding a minimum pressure value is present, the diaphragms are moved into an open position lifted from the valve seat in order to build up and reduce pressure in the spring chamber.

主权项

1. A spring brake cylinder for a vehicle, comprising:
a housing of the spring brake cylinder; a spring brake piston arranged in the housing and being actuable via a preloaded spring, the spring brake piston separating a spring chamber containing the preloaded spring from a spring brake chamber which is ventilated for release and vented for deployment; a diaphragm valve configured to vent the spring chamber directly to atmosphere, the diaphragm valve comprising at least one resiliently movable outlet diaphragm and at least one resiliently movable inlet diaphragm, wherein in a home position, the inlet diaphragm and the outlet diaphragm contact an associated valve seat in a closed position, and in an event of a pressure difference exceeding a respective minimum pressure value between the spring chamber and the atmosphere, the inlet and outlet diaphragms are controlled into an open position lifted-off of the associated valve seat in order to increase and decrease pressure in the spring chamber.