Partition excitation type composite bending vibration linear ultrasonic motor oscillator

A linear ultrasonic motor, bending vibration technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc. Reasonable, inconsistent vibration characteristics of the driving foot, etc., to achieve the effect of improving electromechanical coupling efficiency, improving mechanical output capability, and stable performance
CN102437780AInactive Publication Date: 2012-05-02HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
HARBIN INST OF TECH
Publication Date
2012-05-02
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention provides a partition excitation type composite bending vibration linear ultrasonic motor oscillator, belonging to the piezoelectric ultrasonic motor technology field. Problems that drive foot vibration characteristics of a present bending vibration modal girder type linear ultrasonic motor oscillator are inconsistent, and cutting combination arrangement of bending vibration piezoelectric ceramic sheets is not reasonable are solved. A center of a large end plane of an end cap is provided with a blind hole with internal screw thread. A flange is provided with two studs, each stud is in joint connection with two pairs of bending vibration piezoelectric ceramic sheets, and an end part of a stud is matched with the blind hole through screwing. An electrode slice is provided between adjacent bending vibration piezoelectric ceramic sheets and between a bending vibration piezoelectric ceramic sheet and a contact surface of the flange. The studs are provided with insulation sleeves. Two side surfaces of the flange are provided with two thin walled beams. Outboard of each of the thin walled beams is provided with an installation seat. A small end plane of the end cap is provided with a drive foot. Each bending vibration piezoelectric ceramic sheet is split into two no-bore rectangular piezoelectric ceramic sheets with a same size at two ends and a center hole rectangular piezoelectric ceramic sheet in the middle. The invention is applied to an ultrasonic motor oscillator.
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Description

technical field

[0001] The invention relates to a section-excited composite bending-vibration linear ultrasonic motor vibrator, which belongs to the technical field of piezoelectric ultrasonic motors. Background technique

[0002] Piezoelectric ultrasonic motor is a kind of piezoelectric ultrasonic motor that uses the inverse piezoelectric effect of piezoelectric ceramics to excite vibration in the ultrasonic frequency range in the elastic body, and forms a particle motion with a specific trajectory at a specific point or area on the surface of the elastic body, and then passes through the stator, The frictional coupling between the rotors converts the microscopic motion of the particle into the macroscopic motion of the rotor. It has the advantages of low speed and high torque, no need for a speed change mechanism, no electromagnetic interference, fast response, and self-locking when power is off.

[0003] Sandwich Ultrasonic Motor Using Piezoelectric Ceramics with High Ele...

Claims

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