Patent ID: 8264117
Filing Date: 2012-09-11
Classification: H02K,Y10T

Abstract:
1. A motor comprising: a stator including a stator core having a plurality of magnetic poles disposed along an outer periphery thereof; and a rotor disposed rotatably around the outer periphery of the stator, the rotor having a magnet disposed to an inner periphery thereof with poles magnetized alternately to have different polarities at predetermined intervals, wherein: each of the magnetic poles is provided with extended portions formed in a manner to extend outward from both exterior sides of a magnetic polar base in a direction substantially parallel to the magnet; the stator core comprises a laminated part made by stacking a plurality of sheet-like plates into an integral unit and provided with dimple portions formed on both surfaces in the stacking direction thereof, and side plates each having extended portions and nib portions formed on a surface opposite the side where the extended portions are provided and disposed in a manner to sandwich the both surfaces of the laminated part; and the laminated part comprises a plurality of first sheet-like plates provided with nib-and-dimple combinations having nib portions on one surface and dimple portions produced on the other surface in the process of forming the nib portions, and one sheet of second sheet-like plate of a shape identical to that of the first sheet-like plate and having only holes in positions corresponding to the nib-and-dimple combinations; and the laminated part and the side plates are fastened together by inserting the nib portions on the side plates into the dimple portions formed on the laminated part.