Drive unit with pressure fluid of yaw velocity ψ piston assembly for a hydraulic motor - speed - / torque selector

摘要

A drive unit includes a drive motor, the at least partially in a housing and having a rotor which rotates an output shaft; a selection mechanism, which is at least partially in the housing, then in one of a plurality of orientations are moved one of a plurality of drive motor - settings corresponds to. An actuator, which at least partially in the housing is located, is arranged in such a way that it the selection mechanism in one of the plurality of orientations moved. The actuator has a first and a second piston, each of which for a movement by means of hydraulic pressure in a piston chamber of the housing is arranged. The second piston is in contact with the first piston arranged and configured in such a way that it consists of the hydraulic movement of the first piston and of the second piston resulting forces aggregated and, in order to move the selection mechanism.n="27"