| 摘要 |
PROBLEM TO BE SOLVED: To provide a brushless motor which can effectively restrict motion in the thrust direction of a bearing fixed to each end of a rotating shaft by a simple constitution. SOLUTION: This brushless motor has a stator 1 and a rotor 5 fixed to a rotating shaft 10 in a housing 11 where a flange 12 is fixed to its open end, and the stator 1 is provided with a plurality of salient magnetic poles 2a which are arrayed at equal intervals on the internal perimetric side of a core 2 of an armature, and also equipped with an armature coil 3 wound on each salient magnetic pole 2a, and the rotor 5 is equipped with a flanged permanent magnet field yoke 36 and a permanent magnet 37 for a cylindrical field. Bearings 16 and 17 which are fixed severally to each end of the rotating shaft 10 are retained by the bearing boxes 11a and 12a of the housing 11 and the flange 12. A coil spring 42 which presses each bearing 16 and 17 to the side of the bearing boxes 11a and 12a is arranged on the rotating shaft 10. COPYRIGHT: (C)2007,JPO&INPIT |
