Piezoelectric fibre-based inertial rotating driving device

Abstract

The invention discloses a piezoelectric fibre-based inertial rotating driving device. The piezoelectric fibre-based inertial rotating driving device comprises an actuator, a supporting post, a rolling bearing and a bottom plate. Piezoelectric fibres are adhered to metal plates which are pre-bent to a certain radian; one ends of the metal plates are connected with mass blocks to form the actuator integrally; the other ends of the metal plates are fixed to the supporting post; the supporting post is connected with the bottom plate through the rolling bearing. The piezoelectric fibres stretch and deform under the action of an alternating voltage, so that bending moment is generated on the surface of the metal plates; the other ends of the metal plates are connected with the mass blocks, so that inertia force is generated by the mass blocks in a moving process. Under the excitation of an electric signal, the piezoelectric fibres stretch and deform simultaneously, and the metal plates drive the mass blocks to rotate clockwise quickly to generate inertia impact force in an anti-clockwise direction; the overall device rotates anti-clockwise, then the input electric signal is changed, the metal plates are recovered, and the device is recovered to an original state to complete a period of motion. The device can also rotate clockwise in the mode of changing the input electric signal.

Description

technical field [0001] The invention belongs to the field of precision mechanical drive. It is used in micro-robot drive, micro-miniature machinery, etc. Background technique [0002] In recent years, with the rapid development of micro-nano technology, there is a demand for micro-mechanical drive technology in the technical fields of biomedical engineering, precision machinery, robots, computers, automatic control, precision measurement, micro-manufacturing of precision devices, and ultra-precision machining. increasing day by day. Traditional precision drive mainly adopts mechanical type, such as precision screw pair, rolling slide guide rail, precision spiral wedge mechanism, etc., but due to the existence of gaps, friction, crawling and other problems, its precision is difficult to meet the requirements. Under this condition, the developed Many new driving methods, such as electrostatic attraction, electromagnetic, magnetostrictive, shape memory alloy and piezoelectric...

AI Technical Summary

Problems solved by technology

Existing piezoelectric inertial drive devices mostly use asymmetrical electrical signals as excitation signals, but this drive device has disadvantages such as difficult signal generation, difficult mechanism control, and relatively large retraction motion.

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