Lossless dismounting device for bearing

The bearing lossless dismounting device comprises a support, a screw rod, a tensioning nut, a drawing nut, a fixator, a plurality of drag hooks and a conical adjuster, the screw rod vertically penetrates through the support, the tensioning nut is fixed to the top end of the screw rod, the drawing nut is in threaded connection with the upper middle portion of the screw rod, and a gasket is arranged on the lower side of the drawing nut and arranged on the upper side of the support; the fixator is positioned and installed in the middle of the screw, the lower portion of the screw is in threaded connection and penetrates through the conical adjuster, the upper end of each drag hook is rotationally connected with the fixator, the lower end of each drag hook is provided with a bent claw, the bent claws are matched with a dustproof groove in the inner side of an outer ring of the sealed deep groove ball bearing, and the multiple drag hooks are arranged in the circumferential direction of the fixator at intervals. Th