Inertia piezoelectric driving motor

Abstract

The invention relates to an inertia piezoelectric driving motor. The inertia piezoelectric driving motor comprises piezoelectric vibrators, mass blocks, a rotating table, a base and a composite cantilever, wherein the two ends of each piezoelectric vibrator are fixedly connected to the corresponding mass block and a rotating disc; the rotating table comprises the rotating disc and a rotating shaft; the composite cantilever is of a sheet structure and formed by laminating a high-friction elastic material and a low-friction elastic material, the high-friction elastic material and the low-friction elastic material are the same in size and different in friction coefficient, the composite cantilever is fixedly connected to the lower surface of the rotating disc, and the laminating surface of the high-friction elastic material and the low-friction elastic material passes through the diameter of the rotating disc; the base and the rotating shaft form a rotation pair, the piezoelectric vibrators drive the mass blocks to vibrate, and the composite cantilever bends due to inertia and does rotating motion as the two materials are different in friction coefficient. The inertia piezoelectric driving motor has the advantages of being long in service life, high in fault tolerance, low in precision requirement and the like.

Description

Technical field [0001] The invention belongs to the field of piezoelectric driving, and specifically relates to an inertial piezoelectric driving motor. Background technique [0002] In recent years, with the rapid development of micro-nano technology, 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 a new type of motor composed of functional materials to achieve ultra-precision drive. In recent years, this research has achieved a series of results, such as memory alloy motors, piezoelectric effect motors, electrostrictive motors, and magnetic motors. Telescopic motor, etc. Among them, piezoelectric materials (PZT) have the advantages of convenient control, high power density, high displacement resolution, good frequency respons...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of weak tolerance and short service life of existing piezoelectric motors, an inertial piezoelectric drive motor is proposed, which is composed of a piezoelectric vibrator, a mass block, a rotating table, a base and a composite cantilever. After alternating current, reciprocating bending deformation is generated and the mass block is driven to vibrate. The inertial force causes the composite cantilever to bend and deform. Combining the effects of two materials with different friction coefficients on the composite cantilever, the friction force experienced by the composite cantilever when it rotates clockwise and counterclockwise within one cycle Different, the total rotation angle of the motor when the composite cantilever is subjected to a 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 subjected to a small friction force

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