Variable damping piezoelectric actuator

Abstract

The invention relates to a variable damping piezoelectric actuator, which comprises piezoelectric vibrators, a mass block and composite cantilevers, wherein two ends of each piezoelectric vibrator are fixedly connected to the mass block and the corresponding composite cantilever respectively; each composite cantilever is in a sheet structure and is formed by laminating a low-friction elastic material and a high-friction elastic material; the low-friction elastic materials and the high-friction elastic materials are in the sheet structure and are the same in size; the friction coefficients of the low-friction elastic materials and the high-friction elastic materials are different; the bonded surface of piezoelectric ceramic and each elastic substrate is parallel to the laminated surface of the corresponding low-friction elastic material and high-friction elastic material; bending of the composite cantilevers is driven by bending motion of the piezoelectric vibrators; the materials with different friction coefficients in the composite cantilevers are in contact with a working plane; and the actuator directionally moves. The variable damping piezoelectric actuator can work in a complicated environment; the environment applicability is high; due to contact of the elastic materials, the campsite cantilevers can normally work; and the service lifetime is long.

Description

technical field [0001] The invention belongs to the field of piezoelectric drive, in particular to a variable damping piezoelectric driver. Background technique [0002] With the development of science and technology, micro-drive technology occupies an increasingly important position in the fields of ultra-precision machinery and its manufacturing, precision measurement, biomedicine and other disciplines, and micro-drives are also receiving more and more attention in civilian applications. Piezoelectric ceramic materials have the advantages of high precision, fast response, low driving power, wide operating frequency, and immunity to electromagnetic interference. Therefore, in recent years, precision drivers using such components as driving sources have developed rapidly. However, the existing piezoelectric micro-actuators have a relatively complex structure, difficult processing, high cost, and most of them are rigid structures. When working, the driver is directly in rigid...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of unstable motion and poor applicability of the current micro piezoelectric actuator, a variable damping piezoelectric actuator is proposed, which is composed of piezoelectric vibrator, mass block and composite cantilever. Bending deformation occurs under the action, and the bending of the piezoelectric vibrator drives the bending of the composite cantilever. During a working cycle, combined with the action of elastic materials with different friction coefficients of the composite cantilever, the driver moves toward the side of the material with a smaller friction coefficient

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