Piezoelectric rotary drive for a shaft

摘要

A piezoelectric rotary drive for a shaft, is disclosed which can include a piezoelectric actuator and a coupling portion for driving the shaft as a stick-slip drive. To transmit greater contact forces between the frame and the shaft, at least one piezoelectric actuator and an adjustable and/or deformable frame with at least one coupling portion can be coupled to the shaft in a force-locked manner so as to accomplish a stick-slip drive, wherein the frame translates a piezoelectric deformation of the actuator mechanically such that the coupling portion rotates about the axis of the shaft over at least a part of the circumference of the shaft.

主权项

1. A piezoelectric rotary drive for a shaft, comprising:
at least one piezoelectric actuator; and an adjustable and/or deformable frame with at least one coupling portion for coupling to the shaft in a force-locked manner so as to accomplish a stick-slip drive, wherein the frame is configured to mechanically translate a piezoelectric deformation of the actuator such that the coupling portion will rotate about an axis of the shaft over at least a part of a circumference of the shaft, wherein at least one spring pretensions the coupling portion and the shaft relative to each other, the coupling portion is flexibly connected to one other portion of the frame by one hinge, so that the coupling portion and the other portion of the frame are pivotable relative to each other by the hinge, the coupling portion is substantially U-shaped and surrounds the shaft over more than half of the circumference of the shaft.