Travelling-wave linear ultrasonic micromotor

Abstract

The invention discloses a travelling-wave linear ultrasonic micromotor which belongs to the technical field of ultrasonic motors and is mainly characterized by comprising a stator, wherein the stator is shaped as an annular hollow slice, and a piezoelectric ceramic ring is arranged on the surface of the stator; driving mechanisms are distributed on the outer edge of the stator, the lateral edges of the driving mechanisms are provided with a plurality of guide rails along the axial direction of the stator, and the driving mechanisms correspond to and is in contact with the guide rails; and a pretightening mechanism is connected to one end surface of the stator and in contact with the guide rails. The invention aims at providing the travelling-wave linear ultrasonic micromotor which has the advantages of compact structure, small occupying space, stability of working and high precision and is suitable for the aspects of optical lens, biology, medical treatment, micromachine, the science and technology for national defense, and the like.

Description

Traveling Wave Linear Ultrasonic Micromotor technical field The invention relates to an ultrasonic micromotor, more specifically, to a traveling wave linear ultrasonic micromotor. Background technique Ultrasonic motors use the inverse piezoelectric effect of piezoelectric materials to convert electrical energy into vibration energy of the ultrasonic motor stator, and then convert it into rotation or linear motion of moving parts through friction. It is generally mainly composed of functional components such as a stator, a rotor (mover) and a pre-pressure mechanism. Compared with traditional electromagnetic motors, ultrasonic motors have many unique features and advantages, such as: (1) Compact structure, high energy density (torque / mass), and easy miniaturization of the motor; (2) Low speed and high torque, without gear reduction mechanism, can realize direct drive; (3) The motor responds quickly, and can realize power-off self-locking; (4) Good position and speed ...

AI Technical Summary

Problems solved by technology

Since different types of vibration modes have different sensitivities to changes in external conditions, when conditions such as temperature, pre-pressure, and drive signal voltage change, it is easy to affect the composite vibration of the stator using different types of composite vibration modal motors, making the motor Performance varies wildly and is not easily tuned

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