Vertical bending layer energy converter round disk stator and ultrasonic electromotor using this stator

Abstract

The invention discloses a longitudinal bending sandwiched energy converter-typed round disc stator and an ultrasonic motor to which the stator is applied, which relates to the ultrasonic motor field. The invention solves the problems in the existing ultrasonic motor, of complex processing, difficult assembly, and lower mechanical output capacity and controllability of the ultrasonic motor. The longitudinal bending sandwiched converter of the stator is fixed between a round disc at the upper end and a round disc at the lower end, both the front end cover and the back end cover of the longitudinal bending sandwiched energy converter are a quadrangular with a rectangle cross section narrowing down gradually, the small end faces of the front end cover and the back end cover are fixedly connected with the upper round disc and the lower round disc; each piezoelectric ceramic piece is polarized along the thickness direction and four pairs of piezoelectric ceramic pieces are respectively fixed between the front end cover, the back end cover and the flange. Rotors in the ultrasonic motor take the shape of a round disc and are embedded respectively from the top and the bottom of the stator component, a wearable cushion is fixed at the end face, contacting the round disc, of the rotor and the stator is fixed to a base through the flange on the energy converter. The longitudinal bending sandwiched energy converter-typed round disc stator and the ultrasonic motor of the invention has the advantages of simple structure, flexible design, high electromechanical coupling efficiency, outputwith large torque, stable performance and easy control.

Description

technical field

[0001] The invention relates to a longitudinally curved sandwich transducer-type disc stator and an ultrasonic motor using the stator, belonging 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 transmission mechanism, no electromagnetic interference, fast response, and self-locking when power is off. As a piezoelectric driver, it has Very wide range of appli...

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