Adjustment device for an axial piston machine and hydraulic machine having such an adjustment device

摘要

An adjustment device for a pivoting cradle of a hydraulic machine, in particular of an axial piston machine, is disclosed. Said adjustment device has an actuating piston to which pressure medium for pivoting the pivoting cradle about a pivoting axis is applied via an actuating pressure space. In order to control the feeding in of pressure medium and the relieving of the actuating pressure space, a control valve is provided. Said control valve has a control piston configured to be adjusted by an electric actuator, wherein the electric actuator is controlled by a control device. In this context, the control device controls the electric actuator as a function of a control difference formed from a setpoint pivoting angle and an actual pivoting angle of the pivoting cradle. The actual pivoting angle of the pivoting cradle is fed back electrically to the control device here.

主权项

1. An adjustment device for an adjustable pivoting cradle of a hydraulic machine, the adjustment device comprising:
an actuating piston to which pressure medium is applied via an actuating pressure space to pivot the pivoting cradle about a pivoting axis; and a control valve configured to control a feeding of the pressure medium to the actuating pressure space and a relieving of the pressure medium from the actuating pressure space, the control valve having a control piston configured to be controlled by an electric actuator, wherein an actual value of a controlled variable is fed back electrically to a control device to control the electric actuator, and wherein the control piston and the actuating piston are mechanically decoupled, such that the control piston is independently movable relative to the actuating piston by the electric actuator.