Rotary-piston motor rocking movement limitation system - includes stops on rings turned in housing by pressure

摘要

The system limits rocking movement of a hydraulic or pneumatic rotary-piston motor, having one or both of the stops (5,6) on rings (7,8) accommodated in the motor housing (1). The stop can be turned by application of pressure or from outside, and can be positively secured to the housing. A passage (15) in the stop, supplying or discharging the working medium, leads from the face of the stop towards the motor working chamber. Each stop can work with a vane (3,4) these being mounted one behind the other on the piston shaft (2) in the axial direction. Each vane is pressurised in one direction only, opposite to that of the other.