Screws actuator underlying the internal volume compensation

摘要

The present invention relates to a magneto-hydrodynamic screws actuator (1) for actuating a clutch, with a in a manner fixed against relative rotation but axially movable relative to a driven shaft (33), ones spindle (2), which a screw thread (16) which, in one chamber (24) with the magnet of rheological fluid (mrf) is arranged, wherein at least one with an electrical current through flow coil (15) which can be arranged so that, in of the magnetorheological fluid a these strengthening magnet field can be built up, wherein a volume compensation space (25) for receiving a fluid-conducting manner magnetorheological liquid with the chamber (24) is connected.