Piezoelectric torque actuator based on planar two-level displacement enlargement mechanism and actuating method thereof

Abstract

The invention provides a piezoelectric torque actuator based on a planar two-level displacement enlargement mechanism and an actuating method thereof. The actuator comprises a shell, a planar two-level displacement enlargement mechanism, a piezoelectric stack and a torsion wheel, wherein the planar two-level displacement enlargement mechanism is placed in the shell; the piezoelectric stack is placed in the planar two-level displacement enlargement mechanism; the torsion wheel is mounted on the shell; the central hole of the torsion wheel sleeves an external diamond ring intermediate shaft of the planar two-level displacement enlargement mechanism; after the piezoelectric stack is powered up, the piezoelectric stack elongates, the short shaft direction of an external diamond ring is elongated, a flexible hinge rotates and deforms, the external diamond ring intermediate shaft rotates to drive the torsion wheel to rotate an angle, thus realizing the output angle displacement and torque function. The piezoelectric torque actuator disclosed by the invention has the characteristics of electromagnetic interference resistance, simple structure, low power consumption, large rotation angle, small size and light weight.

Description

technical field [0001] The invention relates to the technical field of actuators, in particular to a piezoelectric torque actuator and an actuating method based on a planar two-stage displacement amplifying mechanism. Background technique [0002] The piezoelectric actuator based on the inverse piezoelectric effect has the advantages of high resolution, large output force, fast response, low power consumption, and light structure. With the advancement of material preparation and processing technology, new piezoelectric actuators can meet different technical requirements. Therefore, piezoelectric material actuators are one of the most widely used intelligent drive devices in many fields such as machinery, ships, automobiles, civil engineering, and aerospace. [0003] Since the output displacement of the piezoelectric material is a micro-displacement, in order to realize the angular displacement actuation, generally multiple piezoelectric stacks are used for step-by-step actu...

AI Technical Summary

Problems solved by technology

If it is required to output output angular displacement and torque, and at the same time have the functions of anti-electromagnetic interference, simple structure, non-stepping, low power consumption, large rotation angle, small size, and light weight, traditional piezoelectric actuators are difficult to meet all the above conditions.

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