Space micro-gripper based on compliant mechanisms

Abstract

The invention discloses a space micro-gripper based on compliant mechanisms. The space micro-gripper comprises plane gripping branch chains with a symmetric structure and microprobes. Five pairs of symmetric circular flexible hinges are adopted in the gripping branch chains to achieve two stages of amplification of input displacement of the space micro-gripper, wherein three pairs of flexible hinges are symmetrically distributed on the two sides to achieve the first stage of amplification of input displacement, and the other two pairs of flexible hinges are used for achieving the second stage of amplification. A clamping groove structure is adopted for perpendicularly and symmetrically assembling the two gripping branch chains in a cross form, the two gripping branch chains are connected together in the manner of nesting an upper groove and a lower groove so that the drive positions of the two gripping branch chains can be the same, and the two gripping branch chains are driven by one driver at the same time. Four gripping arms of the two gripping branch chains are each provided with one corresponding microprobe, the microprobes are sleeved with the gripping branch chains in a threaded connection manner so that the elongation of the microprobes can be adjusted, and adjustability of the size of a gripping opening is achieved. The four microprobes are symmetrically arranged to form the square space gripping opening, and when gripped objects are in four-point contact, objects in irregular shapes can be gripped. The designed space micro-gripper can be used for the fields of bioengineering, micro electro mechanical systems, nanoscale science and technology, optical engineering and the like.

Description

technical field [0001] The invention belongs to the field of precision engineering, and in particular relates to a micro-object clamping device designed by using a compliant mechanism. The designed micro-clamp can be used in the fields of biological engineering, micro-electromechanical systems, micro / nano manufacturing and assembly engineering, optical engineering, and the like. Background technique [0002] As the research objects in the fields of bioengineering technology, MEMS technology, micro / nano technology and optical engineering are developing in the direction of miniaturization, the micro gripper is used as the end effector in the process of operating tiny objects. There are good application prospects in the fields of parts processing, assembly, bioengineering and optics. In the field of micro-electromechanical systems, micro-grippers can be used to assemble micro-shafts, micro-gears and other micro-parts into micro-components; To infuse or extract a substance from...

AI Technical Summary

Problems solved by technology

However, the output stroke of the driver of the compliant mechanism is relatively small. In order to achieve a large opening and closing amount of the gripper, it is necessary to design a compliant mechanism with amplifying function.

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