Magnetostriction-type inertial impact driver

A magnetostriction-type inertial impact driver comprises a frame, a driving shaft, coils, cantilever beams and Terfenol-D slices. Two ends of the driving shaft are installed in a through hole of the frame and form clearance fit with the through hole. The cantilever beams are symmetrically installed on two sides of the driving shaft. Free ends of the cantilever beams are provided with counterweight blocks. The Terfenol-D slices are bonded to one side of each cantilever beam. Largest magnetostrictive directions of the Terfenol-D slices are the same and are the same with a length direction of the cantilever beams. The coils which are arranged on the frame and are symmetrically distributed sleeve the cantilever beams of the two sides of the driving shaft. The cantilever beams pass through the coils. By using the magnetostriction-type inertial impact driver of the utility model, because the driving shaft, the cantilever beams and the Terfenol-D slices are not contacted with the coils, a moving part does not need to drag a power supply cable during a moving process. Therefore, an interference of the power supply cable to the driver can be greatly reduced and motion precision and stability of the driver are increased.