Piezoactive motor based on independent stator modules
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United States of America Patent
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-
Nov 14, 2000
Grant Date -
N/A
app pub date -
Dec 15, 1998
filing date -
Jun 27, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A piezoactive motor has a stator equipped with independent stator modules 44, each comprising at least one pair of longitudinal piezoactive actuators 12, 14 colinearly arranged inside a mechanical coupling element 16 in the form of a shell 20. In addition, it is fixed by flexible decoupling links 68, 70 and comprises a central countermass 18. To produce a closed trajectory of the peaks (A and B) designed to cause by friction relative movement of a driven part over a large travel distance, and to position the driven part, these modules use separately or in combination: translational deformation, obtained when the piezoactive actuators are deformed in opposition and produce a tangential movement of the peaks (A and B) of the shell (20) relatively to the countermass (18), due to the mass ratio between the countermass and the shell, flexional deformation, obtained when the piezoactive actuators are deformed in the same way and produce a flexion of the shell (20), resulting in a normal movement of the peaks A and B.
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