Bent type piezoelectric ultrasonic motor

An ultrasonic motor, piezoelectric technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve the problem of difficulty in ensuring the working stability of piezoelectric ultrasonic motors, etc. To achieve the effect of good excitation effect, improve stability and reduce production cost
CN103607136AInactive Publication Date: 2014-02-26HEBEI UNIVERSITY
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
HEBEI UNIVERSITY
Publication Date
2014-02-26
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to a bent type piezoelectric ultrasonic motor. A front support and a back support are mutually buckled to form a motor casing, the front support and the back support are respectively provided with core holes of which hole ports are opposite, the two core holes are respectively equipped with a bearing, two ends of a rotor are in supporting connection on the bearings in the two core holes, a buckle chamber between the front support and the back support is further equipped with a stator, a shape of the stator is four radiation boards which are connected between an outer-square inner-circular outer border and a ring-shaped inner border along a circumference of the inner border uniformly, the four radiation boards have same directions along the circumference and are in tangential relation with the inner border, an inner circular face of the inner border of the stator is sleeved on an outer circular face of the rotor, and piezoelectric ceramic sheets are four and are respectively pasted on four end side faces of the outer border of the stator. According to the bent type piezoelectric ultrasonic motor, frequencies of bending deformation and torsion deformation of the stator are completely consistent, operation stability of the motor is facilitated to improved, and manufacturing cost can further be reduced.
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Description

technical field

[0001] The invention relates to a piezoelectric ultrasonic motor, in particular to a bending and twisting piezoelectric ultrasonic motor. Background technique

[0002] The piezoelectric ultrasonic motor uses the inverse piezoelectric effect of piezoelectric ceramics to excite the ultrasonic vibration of the stator, and uses the vibration deformation of the stator to drive the rotor in contact with it to rotate. Piezoelectric ultrasonic motor has the advantages of rapid response and easy miniaturization, and has a good application prospect in the field of drive control of micro-miniature electromechanical devices. At present, the existing ultrasonic motors are divided into two types: traveling wave type and standing wave type. Patent No. CN02217486.9 discloses a "longitudinal torsion composite ultrasonic motor", which is a standing wave rotating ultrasonic motor with a columnar structure. The motor stator consists of a lower metal ring, a piezoelectric cerami...

Claims

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