Piezoelectric displacement amplification mechanism of half diamond structure

Abstract

A piezoelectric displacement amplification mechanism of a half diamond structure comprises a base, an external displacement amplification mechanism, a piezoelectric stack placement structure and a piezoelectric stack; the external displacement amplification mechanism is connected with two ends of the base through a first flexible hinge and a second flexible hinge respectively and is integrally designed; the piezoelectric stack placement structure is placed on the base and fixed at the bottom in the external displacement amplification mechanism through a third flexible hinge and a fourth flexible hinge; the piezoelectric stack is placed inside the piezoelectric stack placement structure and is always located in the pressed state; the external displacement amplification mechanism comprises a first lever with one end with the second flexible hinge as a fulcrum and a second lever with one end with the first flexible hinge as a fulcrum; the other ends of the first lever and the second lever are of the half diamond structure which is integrally designed; two ends of a long shaft of the half diamond structure are connected with the first lever and the second lever respectively so as to achieve two-stage displacement amplification; the top end of the half diamond structure is provided with a square force output platform; the polarization direction of the piezoelectric stack is perpendicular to the first lever and the second lever. The piezoelectric displacement amplification mechanism of the half diamond structure has the advantages of being simple in structure, small in size and light in weight.

Description

technical field [0001] The invention relates to a micro-displacement amplifying mechanism, in particular to a piezoelectric displacement amplifying mechanism with a semi-diamond structure. Background technique [0002] As an important part of the active control system, the actuator is widely used in industrial production and daily life. With the development of active control technology, the requirements for actuators are getting higher and higher. Due to the limited output displacement of the unimorph stack, the traditional unimorph actuator can only output a small displacement. Contents of the invention [0003] In order to solve the above-mentioned problems in the prior art, the object of the present invention is to provide a piezoelectric displacement amplifying mechanism with a semi-diamond structure, which has the characteristics of simple structure, small size and light weight. [0004] In order to achieve the above object, the technical scheme adopted in the prese...

AI Technical Summary

Problems solved by technology

Due to the limited output displacement of the unimorph stack, traditional unimorph actuators can only output small displacements.

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