Piezoelectric drive high-precision rotary actuation device and method with integrated clamp drive

Abstract

The invention provides a clamp-driven integrated type piezoelectric-drive high-precision rotary actuator and method thereof. The actuator comprises an actuator pedestal, a lower thrust ball bearing being installed at the pedestal and being capable of bearing an axial load, a lower drive structure arranged above the pedestal, an upper drive structure connected with the lower drive structure 3 into one, an output shaft being capable of being clamped and limited by the lower drive structure and the upper drive structure after installation, an upper thrust ball bearing installed above the output shaft, and a top cover installed above the thrust ball bearing. In addition, the invention also discloses an actuating method for the actuator. Piezoelectric ceramic units are driven according to a certain order to realize bidirectional large-angle rotation driving. The upper drive structure and the lower drive structure have completely identical geometric dimensions; and with slow feeding, one-time processing moulding is realized, the processing and assembling flow is simplified, and the implementation is high. Moreover, the actuator employs the piezoelectric ceramic units as driving elements. The actuator has characteristics of large output stroke, high output resolution, and power-off self-locking.

Description

technical field [0001] The invention relates to a stepping rotary actuating device driven by piezoelectricity, in particular to a piezoelectric-driven high-precision rotary actuating device which is easy to process and implement and integrates clamping and driving, and a realization method thereof. Background technique [0002] In recent years, the continuous development of piezoelectric actuators has supported the development and construction of important industries such as national defense, aerospace, and machinery manufacturing, and has also derived a wide variety of piezoelectric actuators. However, due to the shortcomings of piezoelectric materials with small actuating strokes, On the one hand, it is difficult for piezoelectric ceramic actuators to realize the output of large strokes, especially large angular displacements. On the other hand, it also puts forward higher requirements for processing and assembly. Therefore, there is an urgent need for a step-by-step rotar...

AI Technical Summary

Problems solved by technology

[0002] In recent years, the continuous development of piezoelectric actuators has supported the development and construction of important industries such as national defense, aerospace, and machinery manufacturing, and has also derived a wide variety of piezoelectric actuators. However, due to the shortcomings of piezoelectric materials with small actuating strokes, On the one hand, it is difficult for piezoelectric ceramic actuators to achieve large strokes, especially the output of large rotational angle displacements. On the other hand, it also puts forward higher requirements for processing and assembly.

Images