Multi-flap standing wave type ultrasonic motor
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United States of America Patent
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Dec 26, 2017
Issued Date -
N/A
app pub date -
Aug 21, 2014
filing date -
Jul 18, 2014
priority date (Note) -
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Abstract
Provided is a multi-flap standing wave type ultrasonic motor, including a rotor part, a stator part, a control circuit board, and a fixing attachment. The rotor part includes a flange, a rotor ring, and a shaft. The shaft and the flange are joined together by using a first screw and the flange and the rotor ring are joined together by using a second screw. The stator part includes a piezoelectric ceramics, an excitation ring, and flaps. The piezoelectric ceramics and the excitation ring are fixed with glue, the flaps and the excitation ring are connected through welding, and form an angle with the radial direction of the excitation ring. The stator part is sleeved on a support, is attached to a pressure plate and is connected, through an upright, to a locking plate, and to a substrate of the control circuit board to form a fixing attachment. The flaps are an elastomer and a preload provider. The inner diameter of the rotor ring is less than the outer diameter of the flaps. Adopted is a circular-distributed flap structure, an outer rotor design, an integrated design of motor and control, and a sensor, thereby simplifying the system structure. By adopting circular-distributed assembled flaps, the processing difficulty of the flaps is reduced.
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