Vehicle steering hydraulic servomotor limit switch - has mechanical sensor with spring between sensor and valve body to provide variable release pressure

摘要

The valve housing (1) has an oil inlet connection (2) and outlet connection (3) to the oil pump and an oil reservoir. The valve body (4) is a steel ball pressed against its seat (7) by spring (6) in the valve body space (5). The valve seat is a threaded insert (8) screwed into the body (1). The bore in the centre of the insert contains an axially slidable pin (10) with a spring disc (9) fitted on its end. The pin (10) has a sliding seal O-ring (11) and has a stepped dia. towards the ball. If the ball is lifted off the seat, oil flows through port (13) to the outlet connection (3).