Light and small unimorph stack-driven bidirectional rotary inertial actuator and actuation method

Abstract

The invention relates to a light micro single piezoelectric stacked driving type bidirectional rotation inertia actuating device and actuating method. The actuating device comprises a foundation, a bearing, an output shaft, an actuating plane board and a piezoelectric stack, wherein a left side of the foundation is provided with a mounting boss, a right upper corner of the foundation is provided with a bearing seat, the bearing mounted in the bearing seat is in internally interference fit with the output shaft, an upper portion of the mounting boss of the foundation is fixed with the integrated actuating plane board, the actuating plane board comprises a vertical board, an actuating arm, a rhombus ring and a flexible hinge, a left side of the actuating arm is connected with the vertical board through a horizontal flexible hinge, a lower portion of the actuating arm close to the horizontal flexible hinge is connected with an upper end of the rhombus ring through a vertical flexible hinge, the rhombus ring is in internally interference fit with the piezoelectric stack, a tail end of the actuating arm is provided with an arc concave surface, and the arc concave surface and the output shaft are concentric and realize tight fit. The actuating device is advantaged in that the structure is novel, the actuating device is easy to process, in combination with inertia driving and a lever amplification principle, the actuating device further has properties of rapid and accurate actuation and light and smart structure.

Description

technical field [0001] The invention belongs to the technical field of inertial piezoelectric actuators, and in particular relates to a light and small single piezoelectric stack-driven bidirectional rotary inertial actuator and an actuating method. Background technique [0002] Inertial piezoelectric actuator is a kind of mechanism that adopts asymmetrical driving signal, asymmetrical mechanical clamping structure or asymmetrical friction force as the control mode, and forms the driving mechanism through inertial impact motion. [0003] Compared with other types of piezoelectric drives, inertial piezoelectric actuators have the main advantages of simple structure, fast response, high resolution, large stroke, fast movement speed, and low cost. positioning accuracy. Therefore, inertial piezoelectric actuators are suitable for occasions that require high resolution and large strokes. At present, scientific and technological workers have successfully applied inertial piezoel...

AI Technical Summary

Problems solved by technology

[0004] Generally, rotary inertial piezoelectric actuators often use bimorphs as driving elements, which have complex structures and low strength; currently, most rotary inertial actuators only rely on line contact for clamping, which is easy to clamp due to surface wear. Bit failure; In addition, most rotary inertial actuators require higher voltage to output a small step, and the efficiency is low

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