An Inertial Impact Linear Piezoelectric Motor Based on Cantilever Beam Structure

Abstract

The invention relates to an inertial impact linear piezoelectric motor based on a cantilever beam structure, and belongs to the technical field of precision driving and positioning. It includes a base, a vertical rod, a piezoelectric stack, a guide rod and a moving slider; the lower part of the outer end of the horizontal block of the base is connected to the lower end of the vertical rod through a flexible hinge, and the upper part of the vertical rod is fixedly connected to one end of the guide rod. The other end of the rod is in the shape of a cantilever, and the moving slider is slidably fitted on the guide rod; the piezoelectric stack is located parallel to the top of the horizontal block of the base, and is fixedly connected between the middle of the vertical rod and the vertical block of the base; When working, the piezoelectric stack is not energized at the initial length; the piezoelectric stack is energized under the action of the positive sawtooth frequency voltage, which drives the upper part of the vertical rod to swing, and drives the moving slider to move along the guide rod by static friction; When the electric stack recovers to the initial length, the moving slider completes a step ΔH movement, and a positive periodic motion is completed at this time; under the action of the reverse sawtooth frequency voltage, the moving slider realizes the reverse movement.

Description

technical field

[0001] The invention belongs to the technical field of precision driving and positioning, and in particular relates to an inertial impact linear piezoelectric motor. Background technique

[0002] Piezoelectric motor is a kind of driving mechanism that uses inverse piezoelectric effect to convert electromechanical energy. Because of its superior characteristics, it is widely used in biomedical devices, precision positioning systems, electronic scanning technology and other fields. There are many structural styles of piezoelectric motors, which can be mainly divided into inertial impact motors, ultrasonic motors, and inchworm motors.

[0003] Inertial impact piezoelectric motors, which use inertial impacts to achieve micro-displacement, are also known as "stick-slip actuators". The inertial impact motor developed by Qiaosheng Pan et al., University of Science and Technology of China, is designed as an H-like structure, imitating the movements of hands and feet...

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