STEPPING HYDRAULIC DRIVE FOR RECIPROCATING MOTION (VERSIONS) Russian patent published in 1998 - IPC

FIELD: complex mechanization equipment. SUBSTANCE: stepping hydraulic drive includes hydraulic power source, one hydraulic cylinder 2 (according first version) or several hydraulic cylinders 2 (according to second and third versions) and hydraulic distributors connected to pressure main 5 and return main 6. Each hydraulic cylinder is made in form of twin hydraulic cylinder with coaxially connected housing separated by partition forming three stages of separation. Ratio of piston strokes of first and second stages of separation ranges from 0.1 to 1.0; third stage of separation is equal to sum of strokes of pistons of first and second stages of separation. Connected of rod and piston chambers o both stages through hydraulic distributors ensures translation motion by steps corresponding to each stroke of piston or sum of strokes. According to first version, chambers of first and second stages of each twin hydraulic cylinder 2 are independently connected to hydraulic distributor. According to second version, hydraulic cylinders are arranged in groups and chambers of stages of separation are connected in parallel hydraulic distributors. According to third version, chambers of first stage of each hydraulic cylinder are connected in parallel hydraulic distributor and chambers of second stage of each hydraulic cylinder are connected hydraulic distributor. EFFECT: enhanced efficiency. 3 cl, 8 dwg