Patent ID: 9712007
Date: 2017-07-18
CPC Classifications: H02K,Y10T

Claim:
1. A rotor core comprising: a laminated steel body including a plurality of axially laminated magnetic core plates extending in a direction perpendicular or substantially perpendicular to a vertical center axis; and a plurality of magnetic pole portions arranged along a circumferential direction with magnet insertion spaces defined between adjoining ones of the magnetic pole portions, each of the plurality of magnetic pole portions including a pair of circumferential end surfaces facing toward the magnet insertion spaces and a radial end surface facing toward a space that is radially outward of each of the magnetic pole portions; wherein at least some of the plurality of magnetic core plates include claws protruding from the plurality of magnetic pole portions in the circumferential direction and outer connection portions located radially outward of the claws to interconnect the adjoining ones of the plurality of magnetic pole portions; the magnet insertion spaces are interposed between the circumferential end surfaces of the plurality of magnetic pole portions and positioned radially inward of the claws; a pair of the claws is positioned radially outward of each of the magnet insertion spaces; a first space is provided between the pair of the claws positioned radially outward of each of the magnet insertion spaces, each of the outer connection portions is positioned radially outward of the first space, and second spaces are provided between the claws and the outer connection portions; and the claws include slant surfaces which gradually become closer to base end portions of the claws along entire lengths of the claws as the slant surfaces extend radially outward, the second spaces being provided between the slant surfaces and radial inner surfaces of the outer connection portions.