Hydraulic motor or pump with tangential pistons with annular or sectional shape on ordinary or planetary gear for high torque, and power performance and hydraulic and mechanical efficiency

摘要

A hydraulic motor or pump includes eccentric shafts arranged in a planet position with respect to the output shaft, subject to the action of two propelling members for each shaft, which are arranged in a tangential position with respect to the output shaft and act on intermediate planetary fixed parts alternated with the shafts. The propelling members receive flow of pressurized fluid regulated by rotatory openings, which connect the propelling members to the pressure circuit or to the discharge one. The motor can be connected, through the eccentric shafts, to ordinary or planetary gearings. The gearing presents an actual piston displacement and one or two different equivalent piston displacements. The shape of the motor is annular, or sectoral, with a circular open space available inside the motor for different applications. The number of the planet shafts has no limits, since they independently transmit the torque-allowing annular shapes of any size.