Patent ID: 8344565
Filing Date: 2013-01-01
Classification: F16H,H02K,Y10T

Abstract:
1. An actuator arrangement for the axial displacement of an actuation member by means of a drive force which is generated by an electric machine, the actuation member is mounted to rotate with a rotary shaft and is mounted axially displaceably on the rotary shaft, the electric machine having a stator that is fixed to a housing and drives a rotor which is coupled to the actuation member and is arranged coaxially with respect to the actuation member, wherein the rotor is coupled to the actuation member via a rotation/translation converter, in such a way that, when the rotor is driven to rotate synchronously with the rotary shaft, there is no relative rotational speed between the rotor and the actuation member and the actuation member maintains its axial position; and, when the rotor is driven to rotate slower of faster than the rotary shaft, the actuation member is displaced in the axial direction by the rotation/translation converter.