Patent ID: 8963395
Filing Date: 2015-02-24
Classification: H02K,Y10T

Abstract:
1. An annular motor core comprising a plurality of split core pieces, each of the split core pieces including a yoke portion extending in a circumferential direction of the motor core and a tooth extending from the yoke portion substantially in a direction perpendicular to the yoke portion, the split core pieces being circumferentially located and arranged in an annular shape such that the yoke portions of the split core pieces form an annular shape as a whole and that the distal ends of the teeth of the split core pieces face inward or outward in a radial direction of the motor core, wherein each of the split core pieces has a first end and a second end in the axial direction of the motor core, the motor core further includes an annular holder, the holder having joint portions at a plurality of positions in a circumferential direction of the holder, the first end of each split core piece being pivotably joined to a corresponding one of the joint portions, and each split core piece is pivotable about the corresponding joint portion relative to the holder such that the second end of the split core piece moves in a radial direction of the holder.