Linear-shear piezoelectric ceramic cooperatively driven step-rotation actuating device and method

Abstract

A stepping rotating actuating device and method driven by linear-shear piezoelectric ceramic are provided. The actuating device comprises an actuator base, an actuator rotating stator which is mountedon the base and can fix piezoelectric ceramic groups, a rolling bearing embedded onto the top of the rotating stator, a lower thrust ball bearing mounted above the rolling bearing, an actuator rotating rotor limit shaft mounted in the rolling bearing and the lower thrust ball bearing, an upper thrust ball bearing mounted on the output shaft of an actuator rotating rotor, the actuator rotating rotor mounted between the lower thrust ball bearing and the upper thrust ball bearing, and a shell mounted above the upper thrust ball bearing. The invention also discloses an actuating method of the actuating device. The angle of rotation is output by three-leg alternating parallel stepping. Shear piezoelectric stacks are used as displacement direct output components, and linear piezoelectric stacksare used to realize locking. Bidirectional large-angle rotation driving can be realized by driving piezoelectric ceramic in a certain order. The device and the method have the characteristics of large output stroke, high output resolution and power-off self-locking.

Description

technical field [0001] The invention relates to a step-by-step rotary actuating device driven by linear and shear piezoelectric ceramics, in particular to a high-precision step-by-step rotary actuation device driven by linear-shear piezoelectric ceramics and its realization method. Background technique [0002] In recent years, the continuous development of piezoelectric drive devices 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. Piezoelectric ceramic actuators are difficult to achieve torque output with large strokes, especially large rotation angles. Therefore, there is an urgent need for a step-by-step rotary actuating device with simple structure, large driving stroke and high resolution. SUMMARY OF THE INVENTION [0003] In order to meet the above requirements, the purpose of the present invention is to provide a ...

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 shortcoming of piezoelectric materials with small actuating strokes, Piezoelectric ceramic actuators are difficult to achieve torque output with large strokes, especially large rotation angles

Images