Electric impact hammer

An electric impact hammer, comprising:

• a housing, extending along a front -rear direction;
• a motor, received in the housing;
• a rotating assembly, driven by the motor and comprising an output shaft connected to a front end of the motor and a cylinder driven by the output shaft, the motor driving the output shaft to drive the cylinder to rotate;
• and
• an impact assembly, driven by the motor and comprising a piston slidably arranged inside the cylinder, the piston sliding inside the cylinder along the front-rear direction, and the cylinder driving the piston to rotate together with the cylinder;
• wherein the piston defines an accommodating groove running through a rear end surface of the piston and a pair of through holes communicating with the accommodating groove and running through an outer periphery of the piston, a front end of the output shaft is inserted in the accommodating groove;
• wherein the output shaft defines a corrugated groove located on an outer periphery of the front end of the output shaft;
• two ends of the corrugated groove, along the outer periphery of the output shaft, are connected to each other;
• the corrugated groove has an axial front end and an axial rear end;
• wherein the impact assembly comprises a pair of steel balls, a part of each of the pair of steel balls is partially accommodated in the corrugated groove, the other part of each of the pair of steel balls is accommodated in a corresponding one of the pair of through holes;
• and when the output shaft is rotating, the pair of steel balls move between the axial front end and the axial rear end of the corrugated groove to drive the piston to reciprocate in the front-rear direction.