Aiming at the problems that symmetrical microgripper is easy to destroy micro-parts because of uneven force on left and right fingers

asymmetrical microgripper has stable clamping performance

but its output displacement is small

an asymmetrical step micro-clamp is designed

which ensures clamping performance is stable

at the same time

the output displacement is effectively increased.Firstly

the relationship between input displacement and output displacement is obtained by theoretical calculation.Then

the solid model is built.Finally

the simulation values of input displacement and output displacement are obtained by finite element simulation analysis.The simulation output displacement of the microgripper is 811.32 um

the theoretical amplification ratio of the microgripper is 21.701

the simulation amplification ratio is 20.566

and the error is 5.23 %.The displacement amplification ratio of the two methods is very close

which proves the correctness of the theoretical analysis.