Patent ID: 8680735
Filing Date: 2014-03-25
Classification: H02K,Y10T

Abstract:
1. A segment core forming an annular-shaped stator core of a rotary electric machine that includes a rotor rotating about a rotary axis thereof, the stator core being arranged on an outer periphery side of the rotor with a predetermined distance apart therefrom and being formed into an annular shape by circumferentially connecting a plurality of segment cores, each segment core having a sector-like shape segmented from the annular-shaped stator core, the segment core comprising: a yoke portion that forms the outer periphery of the stator core; a tooth portion that extends from the yoke portion to the rotary axis in a radial direction of the stator core; and a steel plate where the yoke portion and the tooth portion are formed; wherein one edge of the sector-like shape linearly extends along the yoke portion and the tooth portion in the radial direction of the stator core, the other edge of the sector shape forms a projection in the yoke portion jutting out from the tooth portion in the circumferential direction whereby the segment core is formed into a shape of an L as a L-shape outline of the segment core, the steel plate is formed on a steel sheet member such that a plurality of segment outlines each defining the L-shape outline are arranged on the steel sheet member in which a combination of two segment outlines in the plurality of segment lines has a rectangular outline, and the plurality of segment outlines being arranged on the steel sheet member to be punched out based on the segment outlines, the L-shape outline defined by each of the plurality of segment outlines includes a right-angle portion in which an inner long edge intersects an inner short edge to form a corner portion, and the two segment outlines are arranged such that a face-to-face relationship is established at least between the inner long edges or between the inner short edges in the right-angle portions of the two segment outlines.