Stype piezoelectric mechanism for amplifying micro displacement

Abstract

The amplifying mechanism includes a flexible amplifying mechanism with piezo drive, connected stretch pole and solid bed for fixing the flexible amplifying mechanism. The flexible amplifying mechanism is composed of multiple L type parallel levers. Flexible hinge is adopted in articulation pivot of each L type lever. When external electric field is applied, each piezo drive generates mechanical shift so as to make lever arm of force rotate around flexible hinge. Finally, shift is output through the stretch pole along longitudinal direction. Based on need of amplifying shift, multiple L type levers can be paralleled to constitute an actuation tube to output large shift. Each simple lever is an independent unit, and driving force of parallel multiple levers will not be reduced. The flexible hinge features zero friction and gapless.

Description

technical field [0001] The invention relates to transmission machinery, in particular to an S-shaped piezoelectric micro-displacement amplification mechanism. Background technique [0002] With the rapid development of mechanical devices represented by robots, driving devices are increasingly important. In the past, most transmission devices used electric motors or hydraulic devices. However, electric motors or hydraulic devices have many shortcomings, such as: heavy weight, complex structure, large volume, difficult maintenance, etc., and the frequency response is not high, which cannot meet the needs of some modern control devices. The needs of engineering applications have brought problems. [0003] In order to solve the above problems, there are more and more researches and applications on the use of piezoelectric ceramics as actuators abroad, such as: mechanical levers, hydraulic amplification mechanisms, diamond mechanisms, etc. The patent applications for the resear...

AI Technical Summary

Problems solved by technology

But on the whole, most of the application research of piezoelectric ceramic actuators is focused on the displacement driving stroke of a few tenths of a micron to tens of microns, and it is impossible to directly use piezoelectric ceramic actuators for stroke driving that requires a displacement of more than a few hundred microns. For driving, the superior driving performance of piezoelectric ceramics cannot be fully utilized, which limits its application range

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