PIEZOELECTRIC MOTOR, CONTROL METHOD FOR PIEZOELECTRIC MOTOR, AND ROBOT
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United States of America Patent
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Issued Date -
Aug 11, 2022
app pub date -
Feb 8, 2022
filing date -
Feb 10, 2021
priority date (Note) -
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Abstract
A piezoelectric motor includes a driven body configured to rotate around a rotation axis, a first piezoelectric vibrator configured to transmit a driving force to the driven body, a moving mechanism configured to move the first piezoelectric vibrator in directions approaching and separating from the rotation axis, and a second piezoelectric vibrator configured to transmit a driving force to the moving mechanism. The moving mechanism includes a screw shaft disposed along the directions and configured to rotate around an axis with the driving force of the second piezoelectric vibrator and a holding section configured to screw with the screw shaft and hold the first piezoelectric vibrator.
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