Electromechanical drive element for exact positioning of objects in nanometre to centimetre range; has rotor held in bearing that can be rotated slightly by piezoelectric element

摘要

The drive element (10) has a rotor (11) held in a bearing (12-14) and at least one piezoelectric element. The bearing has a rotor seat mounted on a bearing block, which can be rotated between limits. The bearing block is rotated by the extension or contraction of the piezoelectric element, as it is acted upon by an electric voltage.