Piezoelectric type torsion driver

Abstract

The invention relates to a driver for generating twisting motion in the mechanical engineering, in particular to a piezoelectric type twisting driver. The driver comprises a base, two piezoelectric material bonding sheets, a holding screw, a motion converting disk, an output shaft and a housing, wherein a through groove is formed at the center of the base, one end of each of the two piezoelectricmaterial bonding sheets is fixed, the other ends of the two piezoelectric material bonding sheets transfer motion to the motion converting disk by using the holding screw which is connected with the motion converting disk through threaded connection or interference connection, no clearance is reserved between the piezoelectric material bonding sheets and the holding screw, the top of the motion converting disk is connected with the output shaft, and the housing fixes the output shaft by a bearing. The piezoelectric type twisting driver has the advantages of simple mechanical structure, small volume, low power consumption, high energy density, small magnetic leakage, high anti-electromagnetic interference ability, simple control circuit, low use cost, high response speed, small noise and strong commonality, and the like.

Description

technical field [0001] The invention relates to a driver for torsion motion in mechanical engineering, in particular to a piezoelectric torsion driver. Background technique [0002] A torsional drive is a drive capable of generating and outputting torsional motion. The traditional torsional drive mostly adopts electromagnetic structure, which has the advantages of large output torque and good speed regulation performance, and has been widely used in the drive field. However, due to the complex structure, the electromagnetic torsional actuator has a large size and is difficult to miniaturize, and its application is limited due to the existence of magnetic leakage. Therefore, the manufacture of torsional actuators using new principles and new methods has become a research hotspot in recent years. [0003] Existing piezoelectric torsional actuators, such as the piezoelectric intelligent torsional vibration control rod disclosed in Chinese patent CN1434227A, use piezoelectric ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a piezoelectric torsion driver, which uses the inverse piezoelectric effect of piezoelectric materials to generate torsional motion, so as to overcome the shortcomings of the existing electromagnetic driver with complex structure and large magnetic leakage, and at the same time overcome the existing piezoelectric torsion. Disadvantages of poor versatility of torsional drives

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