Bionic under-actuated clamping jaw

The bionic under-actuated clamping jaw comprises a power device, a plurality of bionic fingers, an installation fixing frame and a driving bevel gear, the bionic fingers are the same in structure, and each bionic finger comprises a first-stage movement unit, a second-stage movement unit and a third-stage movement unit; wherein the installation fixing frame is used for installing the power device, the driving bevel gear is fixed to the output shaft end of the power device, the power device is connected with the first-stage movement unit through the driving bevel gear, and the first-stage movement unit is connected with the third-stage movement unit through the second-stage movement unit. According to the bionic finger, the multi-connecting-rod mechanism composed of the three movement units is adopted, the clamping jaw rigidity is good, and the load is high; power is transmitted by a stepping motor through a bevel gear, the number of actuators can be reduced through the under-actuated technology, the flexibilit