Compound vibrator line ultrasonic electromotor

Abstract

The invention discloses a linear ultrasonic motor with composite vibrators. The linear ultrasonic motor comprises a frame, a mover, a vibrator and a pre-fastening mechanism, wherein, a sliding base and a hub are fixed inside the frame, the mover is arranged and capable of moving on the sliding base, the vibrator is an elastic metal body taking the shape of a right angled isosceles triangle, shifting teeth which contact the mover are arranged at the right angle part, the front surface and the back surface of the two right-angle side parts are provided with four piezoelectric ceramic pieces and the bottom surface of the vibrator contacts the pre-fastening mechanism. The motor has easy design, simple structure, convenient installation, large push force, long stroke and high working efficiency; with the two prism-shaped composite vibrator and that the shifting teeth with micro-displacement amplification function contact the surface of the mover, and that the two longitudinal prism-shaped composite vibrators are combined into a longitudinal bending composite vibrator of the shifting teeth, the longitudinal bending composite vibrator drives the mover to do a macro movement, thereby obtaining large drive force, comparatively longer working stroke, comparatively higher working rate and comparatively higher disconnection and self-locking capacity.

Description

technical field [0001] The invention relates to a motor using piezoelectric effect, in particular to a compound vibrator linear ultrasonic motor. Background technique [0002] The ultrasonic motor is a micro-motor that utilizes piezoelectric ceramic inverse piezoelectric effect and ultrasonic vibration. It generally consists of a vibrator, a mover (or rotor) and a preload mechanism, and the vibrator is usually composed of piezoelectric ceramics or piezoelectric ceramics and metal elastomers. [0003] In the existing linear ultrasonic motors, the longitudinal and bending composite vibration modes are mainly used, and the longitudinal and bending vibration frequencies tend to be consistent to generate elliptical motion trajectories of surface particles, but the common problems are complicated design process, difficult material processing, assembly The problem of high precision requirements makes it difficult to achieve the same longitudinal and bending vibration frequencies, ...

AI Technical Summary

Problems solved by technology

However, if the right-angled metal elastic body is only used, the elliptical motion track of the drive head is small, and it is difficult to achieve a large thrust and a fast driving speed of the linear ultrasonic motor, and the working efficiency of the motor is not high.

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