Positive and negative bidirectional micro-displacement amplification flexible mechanism and method based on shear type piezoelectric ceramic

Abstract

The invention discloses a positive and negative bidirectional micro-displacement amplification flexible mechanism based on shear type piezoelectric ceramic. The mechanism comprises a rhombus amplification structure, an upper displacement input end a lower displacement input end which are located at the middle of the rhombus amplification structure and integrally machined and formed with the rhombus amplification structure, four piezoelectric stack clamping pieces 3 which can fix two shear piezoelectric ceramics, and the one or more cylindrical rollers placed between the upper displacement input end and the lower displacement input end. The invention further discloses the displacement amplification method of the amplification flexible mechanism, positive and negative bidirectional micro-displacement amplification is realized by using two shear type piezoelectric ceramics based on the rhombus amplification structure, and the amplification flexible mechanism has the characteristics of thesimple and compact structure, the small size, capability of realizing the integrated processing and the variable amplification factor.

Description

technical field [0001] The invention relates to the field of micro precision machinery technology, and is a flexible mechanism that utilizes d31 shear piezoelectric ceramics to realize positive and negative micro-displacement amplification, specifically a positive and negative bidirectional micro-displacement amplification flexible mechanism based on shear piezoelectric ceramics and displacement amplification methods. Background technique [0002] In recent years, with the rapid development of microelectronics technology, micromechanical technology, aerospace, bioengineering and other disciplines, micro-displacement technology has become one of the key technologies in precision motion systems and precision manufacturing processes. Piezoelectric ceramics have been widely researched and applied at home and abroad due to their small size, high displacement resolution, fast response speed, large output force, and high energy conversion efficiency. [0003] Since the output disp...

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Problems solved by technology

[0003] Since the output displacement of piezoelectric ceramics is too small, the application range is limited, so designing a micro-displacement amplification mechanism has been extensively studied.

In the prior art, most of the research is on the flexible micro-displacement amplification mechanism of linear piezoelectric ceramics, but these researched mechanisms are too complicated and can only achieve unidirectional micro-displacement amplification.

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