Secondary displacement amplification type piezoelectric driver

Abstract

The invention relates to a secondary displacement amplification type piezoelectric driver, and belongs to the field of piezoelectric precision driving. The secondary displacement amplification type piezoelectric driver comprises a stator, a pre-tightening mechanism, a rotor, a base and other parts, wherein the stator is fixedly installed on the base through the pre-tightening mechanism, the statorand the rotor achieve positioning and driving transmission in an elastic contact mode, the stator comprises a triangular flexible hinge displacement amplifying mechanism, a driving foot, a hexagonalflexible hinge displacement amplifying mechanism and a piezoelectric stack actuator, the driving foot is an arc-shaped thin metal plate, and two completely-identical flexible thin plates are arrangedon the metal plate, are symmetrically arranged and are flexibly connected with the metal plate. According to the invention, a control electric signal is applied to the piezoelectric stack actuator topush the triangular flexible hinge amplification mechanism to generate forward displacement so as to realize primary displacement amplification while the arc-shaped driving foot generates self-bendingdeformation, and the flexible thin plate is subjected to positive pressure change to generate the self elongation, so that secondary displacement amplification is realized; and the driver has the advantages of simple structure, high precision, large stroke and the like.

Description

technical field [0001] The invention relates to the field of micro precision drives, in particular to a secondary displacement amplifying piezoelectric driver. Background technique [0002] High-precision positioning technology is a hot topic in current research, and piezoelectric actuators are the core research content. At present, piezoelectric actuators are playing a key role in aerospace, ultra-precision machining and other fields. Although traditional piezoelectric actuators have high driving speeds, they are often not compact enough, have low resolution, and poor motion accuracy. With the improvement of science and technology, the traditional piezoelectric actuators can no longer meet the demand, and research on new piezoelectric actuators with high speed, high precision and miniaturization is one of the most important issues at present. Contents of the invention [0003] The object of the present invention is to provide a secondary displacement amplification piezo...

AI Technical Summary

Problems solved by technology

Although the traditional piezoelectric driver has a high driving speed, it is often not compact enough, has low resolution, and poor motion accuracy

With the improvement of science and technology, the traditional piezoelectric driver can no longer meet the demand. Researching new piezoelectric driver with high speed, high precision and miniaturization is one of the most important issues at present.

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