Vertical bending layer energy converter cylinder stator and ultrasonic electromotor using this stator

Abstract

The invention discloses a longitudinal bending sandwiched energy converter-typed cylindrical stator and an ultrasonic motor to which the stator is applied, which relates to the piezoelectric ultrasonic motor field. The invention solves the problem in the existing ultrasonic motor stator, that mechanical output capacity is restrained with poor controllability and low efficiency due to the adoptionof a plurality of energy converters for driving. The inner side of the stator is evenly provided with a plurality of comb-shaped drive teeth, an upper end conical face and a lower end conical face are symmetrically arrangedl at the upper part and the lower part of the comb-shaped drive teeth; the front end cover of the sandwiched energy converter is a quadrangular with a rectangle cross section narrowing down gradually, the small end face of the front end cover is fixedly connected with the outer face of the cylinder of the stator and the front end cover and the back end cover are fixedly connected through a flange; a longitudinal vibration piezoelectric ceramic pieces and flexural vibration piezoelectric ceramic pieces are respectively fixed between the front end cover and the flange, and the flange and the back end cover. A rotor with a shaft and a rotor without a shaft in the ultrasonic motor are respectively arranged at the upper end conical face and the lower end conical face of the comb-shaped drive teeth in the cylinder of the stator. The longitudinal vibration sandwiched energy converter-typed round disc stator and the ultrasonic motor of the invention are applicable to the manufacturing field of the ultrasonic motors.

Description

technical field [0001] The invention relates to a longitudinal bending sandwich transducer-type cylindrical 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...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the mechanical output capability of the stator of the ultrasonic motor that is excited by pasting the piezoelectric ceramic sheet with the metal elastic body is restricted, and it is difficult to ensure that the multiple transducers are driven completely The distortion of the particle vibration track on the surface of the stator caused by consistency reduces the mechanical output capability and controllability of the ultrasonic motor. The invention provides a longitudinally curved sandwich transducer-type cylindrical stator and an ultrasonic motor using the stator

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