A piezoelectric-piston type actuating device and method including a three-stage displacement amplification structure

Abstract

The invention discloses a piezoelectric-piston type actuation device with three-stage displacement amplifying structure and an actuation method of the piezoelectric-piston type actuation device. The actuation device comprises two piezoelectric constraint and three-stage displacement amplifying mechanisms, connecting rods, pins, a crankshaft, an output wheel, a driver and a controller. The method for achieving continuous rotational drive includes that a piezoelectric amplifying mechanism consists of a piezoelectric stack and the piezoelectric constraint and three-stage displacement amplifying mechanisms, and infinitesimal linear displacement output from the piezoelectric stack is output after being amplified by the piezoelectric constraint and three-stage displacement amplifying mechanisms; the connecting rods disposed at the left and right ends are connected with the displacement amplifying mechanisms and the crankshaft, the crankshaft receives force from the connecting rods disposed at the left and right ends, and the torque is formed around the center of the crankshaft to drive the output wheel to rotate; in-phase motion is kept along with extension and contraction of piezoelectric material, so that clockwise or anticlockwise high torque can be output continuously; accordingly, the force output from the piezoelectric material and the linear displacement are converted into the torque of the output wheel to achieve continuous rotation.

Description

Technical field [0001] The invention relates to the field of actuation, in particular to a piezoelectric-piston actuation device and method with a three-stage displacement amplification structure. Background technique [0002] The application of an alternating electric field on the piezoelectric material crystal can cause mechanical deformation of the crystal. The piezoelectric stack-based actuator has the advantages of high resolution, large output force, rapid response, low power consumption, and lightweight structure. With the progress of material preparation and processing technology, the new piezoelectric stack can meet different technical indicators. Therefore, various actuators based on piezoelectric stacks have been widely used in machinery, electric power, aerospace and other fields, and have become one of the most widely used intelligent drive devices. However, due to the micro-displacement of the output of the piezoelectric stack, at present, the performance of the ac...

AI Technical Summary

Problems solved by technology

Piezoelectric actuators have the characteristics of small output rotation angle and large force, and are mostly suitable for vibration reduction and actuation of micro structures; while anti-electromagnetic interference, light weight, large rotation, no phase difference, power-off lock, etc. are required. It is difficult for lever-type piezoelectric actuators and other mechanisms to meet all the above conditions

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