Piezoelectric rotation driving apparatus

Details Piezoelectric rotation driving apparatus Piezoelectric rotation driving apparatus

1995-12-26

1998-01-27

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310323, H02N 200

Patent

active

057125244

ABSTRACT:
The present invention provides a piezoelectric rotation driving apparatus wherein the number of the piezoelectric driving bodies is reduced so as to reduce the size of the apparatus. The apparatus is capable of achieving high efficiency and high torque by extinguishing an inertia rotation period. In are preferred embodiment of the invention, a set of the piezoelectric driving bodies including stacked piezoelectric elements are pressed against a cylindrical rotation body serving as a rotor, which is fitted to a rotation shaft, with leaf springs. The piezoelectric driving bodies are combined integrally with each other by a fitting pin such that action directions of forces of action members in the piezoelectric driving bodies driven by the stacked piezoelectric elements are opposite to each other.

REFERENCES:
patent: 4613782 (1986-09-01), Mori
patent: 4714855 (1987-12-01), Fujimoto
patent: 4769569 (1988-09-01), Stahlhuth
patent: 4783610 (1988-11-01), Asano
patent: 5034647 (1991-07-01), Ohtsuka
patent: 5051594 (1991-09-01), Tsuda et al.
patent: 5132582 (1992-07-01), Hayashi
patent: 5282404 (1994-02-01), Leighton et al.
patent: 5465021 (1995-11-01), Visscher et al.

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