Motor core, stator, and method for manufacturing stator

摘要

An annular motor core has a plurality of split core pieces, each of which includes a yoke portion and a tooth. The split core pieces are circumferentially located and arranged in an annular shape such that the yoke portions of the core pieces form an annular shape as a whole and that the distal ends of the teeth of the core pieces face inward or outward each in a radial direction of the core. The core further includes an annular holder, which has joint portions at a plurality of positions in a circumferential direction of the holder. A first end of each of the core pieces is pivotably joined to the corresponding one of the joint portions. Each core piece can be pivoted about the corresponding joint portion relative to the holder such that a second end of the core piece moves in a radial direction of the holder.

主权项

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.