... right sets of the inner cavity are consistent with the helical screw alveolus. Taking into account the increase of the connecting shaft ... , the right sleeve, 4, eccentric gear, 5, lift plate, 6, helical gear, 7 pin, 8, positioning holes, 9, plywood, 10 journal ... sets, 11, spiral groove, 12, screw, 13, interconnect, 14, interconnect. Specific way of implementing As shown ...