Flexible hinge based piezoelectric driving three-jaw bionic microsized clamping mechanism

Abstract

The invention relates to a flexible hinge based piezoelectric driving three-jaw bionic microsized clamping mechanism, and belongs to the field of precision driving and material micro-mechanical property in-situ tests. Three built-in encapsulated type piezoelectric stacked multi-load piezoelectric drivers are in a 120-degree internal enveloping ring distribution installation form, by means of lower layer flexible hinge sliding pair in plane expansion and motion transmission taking an inner layer fulcrum as a revolute pair movement center, claw toe clamping ends adopt a biological nonsmooth mechanism and soil animal claw toe configuration, the clamping frictional force is increased, and the microsized component clamping problem can be solved; in addition, a micro clamping mechanism can be combined with a combined support unit and a high-temperature loading unit, uniaxial and biaxial force fields which are controllable in displacement under the high-temperature service condition are built, and the microsized component uniaxial and biaxial mechanical property test function is achieved. The mechanism is compact in structure, wide in application range and capable of being combined with a scanning electron microscope for use, and an effective tool is provided for mechanical property test and representation of microsized materials such as carbon fiber.

Description

technical field [0001] The present invention relates to the fields of precision driving and in-situ testing of the micromechanical properties of materials, in particular to instruments and meters in the field of micro-electromechanical systems, especially to a piezoelectric-driven three-claw bionic micro-size clamping mechanism based on flexible hinges, which is used for Clamping and testing of micro-sized materials with a characteristic size diameter below 0.1mm. The present invention can be used compatible with imaging instruments such as scanning electron microscopes to perform in-situ detection on the tested piece under the mechanical state of uniaxial tensile stress and biaxial tensile stress, and to reveal the deformation damage mechanism and performance of micro-sized materials such as carbon fibers. The evolution law provides an effective means to provide testing equipment for material characterization and in-depth understanding of material mechanical properties. Bac...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a piezoelectric-driven three-jaw bionic micro-size clamping mechanism based on flexible hinges, which solves the problems in the prior art that micro-size specimens below the millimeter level are not easy to clamp, and it is difficult to study its mechanical properties, etc. question

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