| 摘要 |
PROBLEM TO BE SOLVED: To obtain a large torque by equalizing the outside diameter of an outer magnetic pole stator with the outside diameter of a motor, and also to prevent the inward flexural deformation, when engaging a comb-tooth outer magnetic pole stator with a coupling member. SOLUTION: In a motor, which is equipped with a rotor made into a cylindrical form and divided into n pieces in the circumferential direction and alternately magnetized into different poles and where a first coil and a second coil are arranged in the order, in axial direction and first outer magnetic pole and inner magnetic pole excited by the first coil are opposed to the side of one end of the rotor to catch the rotor and also second outer magnetic pole and inner magnetic pole excited by the second coil are opposed to the other end of the rotor so as to catch the rotor and which is equipped with a coupling member for securing concentricity, engaging with the inner peripheral faces of the first and second outer magnetic poles, and performing positioning with the first and second outer magnetic poles thereby coupling them, the coupling member for engaging with the first outer magnetic pole and the second outer magnetic pole is constituted of a positioning member, which is made by insert-molding an super-thin nonmagnetic metal plate of 0.1 mm or smaller at its inside periphery. COPYRIGHT: (C)2003,JPO
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