Vibration actuator which effectively transmits micro-amplitude v

Details Vibration actuator which effectively transmits micro-amplitude v Vibration actuator which effectively transmits micro-amplitude v

1996-05-13

1998-12-22

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H02N 200, H01L 4108

Patent

active

058523367

ABSTRACT:
An ultrasonic vibration motor having an elastic body and piezo-electric elements which are joined to the elastic body to harmonically produce a longitudinal oscillation mode and a bending oscillation mode on the elastic body, and to produce elliptical movement of a specified part of elastic body. A rotational member contacts a specified part of the elastic body and is driven to rotate by the elliptical movement of the specified part of the elastic body. A relative movement member is driven by the rotational member. The relative movement member may be driven, even if it has a soft surface, by effectively transmitting oscillations of a micro-amplitude produced on the specified part of the elastic body.

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Ultrasonic Motors Theory and Applications, S. Ueha and Y. Tomikawa, Oxford Science Publications 1993, all pages.
Piezoelectric Linear Motors for Application to Driving a Light Pick-Up Element, Y. Tomikawa, M. Aoyagi, T. Ogasawara, A. Yabuki, Tohoku Institute of Technology, Jun. 9-11, 1993, all pages.

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