| 摘要 |
PURPOSE:To eliminate cost increase factors of parts or manpower, by leading out lead wires of armature coil through a hole made through a fixing frame. CONSTITUTION:A central shaft 31 is arranged at a disc section 30 of a fixing frame 1a while a laminated core 6 of an armature 5 is secured to an intermediate diameter section 33, and lead wires 23 to be connected through a printed circuit board 34 with an armature coil 21 are led out to the outside through a hole 35 made through the disc section 30. Inner rings of a pair of rolling bearings 37, 38 are pressure inserted over a small diameter section 36 of the central shaft 31, while an outer ring of the bearing 38 is secured in a central hole 40 of a rotor frame 12a and the outer ring of the bearing 37 is clearance fitted in the central hole 40. Then a permanent magnet 17 which faces with the core 6 through an air gap is pressure secured to the inner face of the side wall 43. Since two rolling bearings 37, 38 are arranged at one side of a rotor 20a and supported in cantilever, the lead wires 23 of the armature coil can be taken out directly through the hole 35 of the fixing frame 1a without passing through the central shaft 31, and thereby machining and assembling are simplified resulting in cost reduction. |
