Electric tool main shaft locking device

The utility model provides an electric tool main shaft locking device, including the output shaft, gu fixed ring, the holder, the locking kingpin, bearing kingpin and power take off dish, the output shaft has the whole multiaspect axle that is regular polygon of external diameter, the every double -phase adjacent interplanar of multiaspect axle all meets with the arc surface of same circumference,locking kingpin and bearing kingpin be holding in holder respectively, assemble between multiaspect off -axial footpath plane and solid fixed ring in locking kingpin clearance, the bearing kingpin forms bearing fit with multiaspect off -axial footpath arc surface and solid fixed ring, the power take off dish is pegged graft with the holder, during the initiative of power take off dish, the driveoutput shaft rotates, thereby outputting a torque, drive the synchronous rotation of holder simultaneously, during the output shaft initiative, the output shaft rotates and makes the plane of its multiaspect axle deflect, it s