| 摘要 |
PURPOSE:To eliminate the resistance increase of a rotor bearing by forming an iron core of a motor approximately into a torus shape, providing magnetic poles encircling a rotor on both sides of the iron core, and forming the spacings between both these magnetic poles and the rotor wider on the root end side, narrower on the leaking end side and symmetrically. CONSTITUTION:Magnetic poles 9a, 9b encircling a rotor are provided on both sides of an iron core 9 of an approximately torus shape wound with a coil 11 on the outside circumference. The magnetic poles 9a, 9b are designed to have a wide part of the spacings between the same and the circumferential surface of a rotor 10 on the root end side and a narrow part on the leading end side and are formed in point symmetry with respect to the axial center of the rotor 10. The revolutions of the rotor 10 are transmitted to the hand by means of gear mechanisms such as a center wheel 16 provided in the space on the inner side of the iron core 9. |
