Stepping piezoelectric drive motor

Abstract

The invention relates to a stepping piezoelectric drive motor, which comprises piezoelectric vibrators, a rotating shaft, mass blocks, a base and composite cantilevers, wherein two ends of each piezoelectric vibrator are fixedly connected to the rotating shaft and the corresponding mass block respectively; each composite cantilever is in a sheet structure and is formed by laminating a high-friction elastic material and a low-friction elastic material; the friction coefficients of the high-friction elastic materials and the low-friction elastic materials are different; the composite cantilevers are vertically arranged on the lower surfaces of the mass blocks; the laminated surfaces of each high-friction elastic material and the corresponding low-friction elastic material is parallel to the bonded surface of piezoelectric ceramic and one corresponding elastic substrate; the rotating shaft and the base form a rotation pair; the piezoelectric vibrators vibrate to drive the mass blocks to vibrate; the composite cantilevers are bent; and the motor directionally rotates by combining the action of the materials with two friction coefficients adopted by the composite cantilevers. The stepping piezoelectric drive motor has the advantages of being long in service lifetime and simple in structure.

Description

technical field [0001] The invention belongs to the field of piezoelectric drive, in particular to a stepping piezoelectric drive motor. Background technique [0002] In recent years, with the rapid development of micro-nano technology, the research in optical engineering, microelectronics manufacturing, aerospace technology, ultra-precision machinery manufacturing, biomedicine and other technical fields urgently needs drivers with strong tolerance and simple structure. With the development of science and technology, people have developed new motors made of functional materials to achieve ultra-precision driving. In recent years, this research has achieved a series of results, such as memory alloy motors, piezoelectric effect motors, electrostrictive motors and magnetic motors. Scalable motors, etc. Among them, because piezoelectric materials (PZT) have the advantages of convenient control, high power density, high displacement resolution, good frequency response, no heat g...

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Problems solved by technology

[0003] In order to solve the problems of short service life and high processing precision of existing motors, a stepping piezoelectric drive motor is proposed, which is composed of piezoelectric vibrators, rotating shafts, mass blocks, bases and composite materials. The vibrator produces reciprocating bending deformation and drives the mass block to vibrate, and the composite cantilever produces bending deformation. Combined with the effect of two materials with different friction coefficients on the composite cantilever, within one cycle, the friction force on the composite cantilever when it rotates clockwise and counterclockwise is different. The total rotation angle of the compound cantilever under small friction force is greater than the total rotation angle when the friction force is large, so at the end of a cycle, the motor rotates in the direction where the composite cantilever is under small friction force

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