| 摘要 |
PURPOSE:To make it unnecessary to provide any additional electric motor, by constituting an integrated electric motor by a stator and a rotor stored in a case. CONSTITUTION:The top plate 15 of a case 14 is attached freely movably in the longitudinal direction of a long guide 10 by many balls 16 engaged with a guide groove 11 rotatably. The balls 16 circulate to the guide groove 11 again through a path 17 perforated in the top plate 15 tollowing the movement of the top plate 15. The top plate 15 and a bottom plate 18 opposite to this top plate 15 are connected together as one-body by a shaft 19, and a coil 20 is wound around the shaft 19. Plural magnets 21 are arranged round the coil 20 through a gap. These magnets 21 are fixed at equal intervals in the inner beriphey of a crank member 22 which has three eccentic faces on its outer periphery, and upper and lower faces of the crank member 22 are supported by the top plate 15 and the bottom plate 18 through bearings 23, 24. Thus it is possible to dispense with any additional electric motor. |
