HYDRAULIC BALANCE MULTI-VANE TYPE HYDRAULIC MOTOR

摘要

PROBLEM TO BE SOLVED: To provide more economical and efficient hydraulic motor meeting a higher standard from a viewpoint of life period and cost. SOLUTION: In this multi-vane hydraulic motor 14, in order to eliminate the need of fitting a bias spring of a motor and a spring in the prior art, mainly a vane 46 of a hydraulic balance rotor 42 is pressed to be in the operational engagement state with a peripheral cam 54 by the force of hydraulic fluid in a vane lower passage 50 generated by an interlocking hydraulic pump 14. A high pressure chamber 78 provided between a motor housing 38 and a pressure plate 62 fitted to the housing is hydraulically connected to a vane chamber of a rotor 42 of a motor for a hydraulic driving part. An end cap 66 for closing the motor housing 38 has input and output lines operationally connected to the cap.