Cantilever longitudinal-bending composite transducer type cylindrical traveling-wave ultrasonic motor vibrator

A technology of composite transducers and ultrasonic motors, applied in the direction of generators/motors, piezoelectric effect/electrostrictive or magnetostrictive motors, electrical components, etc., can solve the problem of reducing the mechanical output capability and controllability of ultrasonic motors , Vibrator surface particle vibration trajectory distortion, ultrasonic motor mechanical output capacity constraints and other issues, to achieve the effect of improving mechanical output capacity and controllability, flexible design, and large torque output
CN101651431AInactive Publication Date: 2010-02-17HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
HARBIN INST OF TECH
Publication Date
2010-02-17
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention relates to a cantilever longitudinal-bending composite transducer type cylindrical traveling-wave ultrasonic motor vibrator belonging to the technical field of piezoelectric ultrasonic motors and solving the problems that the mechanical output capability of a motor is restricted because the prior ultrasonic motor vibrator adopts a metal elastic body to bond piezoelectric ceramic thinplates to excite, and the mechanical output capability and the controllability of an ultrasonic motor are lowered because a plurality of transducers are simultaneously driven. The cantilever longitudinal-bending composite transducer type cylindrical traveling-wave ultrasonic motor vibrator comprises a cylinder and a cantilever longitudinal-bending composite sandwich transducer which are connectedinto a whole by two cantilevers, a fastening screw is fixedly screwed with a rear end cover after passing through central through holes of a front end cover and the two cantilevers, four longitudinalvibration piezoelectric ceramic plates are arranged between the two cantilevers, two pairs of bending vibration piezoelectric ceramic plates are respectively arranged between the front end cover andthe first cantilever and between the rear end cover and the second cantilever, and the adjacent bending vibration piezoelectric ceramic plates and the adjacent longitudinal vibration piezoelectric ceramic plates have opposite polarization directions. The cantilever longitudinal-bending composite transducer type cylindrical traveling-wave ultrasonic motor vibrator is used for the field of manufacturing ultrasonic motors.
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Description

technical field

[0001] The invention relates to a cantilever longitudinal bending composite transducer type cylindrical traveling wave ultrasonic motor vibrator, which belongs to the technical field of piezoelectric ultrasonic motors. Background technique

[0002] Ultrasonic motor is a motor that uses ultrasonic vibration energy to generate driving force through frictional coupling. It uses the inverse piezoelectric effect of piezoelectric ceramics to excite vibrations in the ultrasonic frequency range in the elastic body, and then forms a particle motion with a specific trajectory at a specific point or area on the surface of the elastic body, and then through the friction between the stator and the rotor Coupling converts the microscopic motion of the particle into the macroscopic motion of the rotor. Ultrasonic motor is widely used as a piezoelectric driver because of its advantages such as low speed and high torque, no need for speed change mechanism, no electromagnetic...

Claims

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