A micro gripper with a two-stage amplification mechanism

Abstract

The invention relates to a microgripper with two stages of magnification mechanisms. The microgripper comprises a motion input mechanism, two displacement input platforms, two fixed racks, four sets of first-stage lever mechanisms, two sets of second-stage bridge type magnification mechanisms and a pair of clamping arms. The displacement platforms are in bilateral symmetry, and the first-stage lever mechanisms are bilaterally symmetric and vertically symmetric. The second-stage bridge type magnification mechanisms are vertically symmetric, and the clamping arms are vertically symmetric. The two ends of the motion input mechanism are connected with the displacement input platforms correspondingly, and the output ends of the displacement input platforms are in transmission connection with the input ends of the second-stage bridge type magnification mechanisms correspondingly through the first-stage lever mechanisms. The output ends of the second-stage bridge type magnification mechanismsare connected with the clamping arms. According to the microgripper, the bridge type magnification mechanisms have symmetry, parallel clamping of a microgripper head is guaranteed, output displacement is directly transferred to the clamping arms, and the microgripper head cannot generate parasitic displacement. The two stages of magnification mechanisms are adopted, displacement subjected to first-stage magnification is input into the bridge type magnification mechanisms, and a larger magnification ratio is achieved.

Description

technical field [0001] The invention relates to a clamping device, in particular to a micro clamp with a two-stage amplification mechanism. Background technique [0002] As the execution end of the micro-operating system, the micro-clamp is widely used in many fields such as micro-electromechanical system, scanning probe microscope, ultra-precision machining, optical adjustment and biological cell manipulation. The micro-clamp generally includes a driving mechanism and a motion transmission mechanism. Among them, the motion transmission mechanism usually includes a lever-type mechanism, a double-rocker mechanism, and a bridge-type mechanism. The lever-type mechanism and the double-rocker mechanism Parasitic displacement is generated, and the bridge mechanism can avoid the generation of parasitic displacement. [0003] Chinese patent CN 103331748A discloses a miniaturized flexible micro-clamp driven by piezoelectric ceramics, the micro-clamp includes a base, a pre-tightening...

AI Technical Summary

Problems solved by technology

Vacuum suction clamping is only suitable for operation on a flat surface, and irregular planes will cause air leakage of the vacuum suction equipment, which in turn will cause clamping failure

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