Patent ID: 8410662

Claim:
An electric universal drive comprising: A revolving or linearly movable drive member ( 1 ) having at least two sets of actuators each arranged in its own carrier ( 3 ) in particular piezo actuators ( 4 , 5 , 6 ) each acting on a leg ( 7 ) supported on the drive member ( 1 ), the at least two sets of actuators alternately pressing the respective associated leg ( 7 ) onto the drive member ( 1 ) for engagement therewith and displacing it in a direction of the desired movement of the drive member in a high-frequency stepping sequence, the carrier ( 3 ) of the actuator sets being connected in a semi-rigid manner with respect to the leg ( 7 ) parallel to the movement direction of the drive member at a location which is displaced to one side and the carrier ( 3 ) being supported on a stator and pre-tensioned elastically by a pretension member ( 9 ) and an elbow lever mechanism ( 10 ) arranged between the pretension member ( 9 ) and the respective carrier ( 3 ) for transferring the pretension force, the elbow lever mechanism ( 10 ) including a first elbow lever ( 24 ) which engages the carrier ( 3 ) at a point which is displaced with respect to the leg ( 7 ) parallel to the direction of movement of the drive member ( 1 ) toward the, with respect to the carrier connection point, other side, the elbow lever mechanism having a second elbow lever which is arranged between the pre-tensioning member ( 9 ) and a stator-based support ( 27 ), and an operating actuator ( 28 ) which is associated with the elbow operating mechanism ( 10 ) and which is connected to the elbow joints of two of the elbow levers ( 24 , 25 ), and the arrangement of the elbow lever ( 24 ) mechanisms ( 10 ) being so selected that, when the first elbow lever is stretched, the second elbow lever ( 25 ) is kinked and vice versa, and the actuator ( 28 ) for the common switching of the two elbow levers ( 24 , 25 ) being provided for the switching of the elbow lever ( 24 , 25 ) between the stretched position and the kinked position.