| 摘要 |
PROBLEM TO BE SOLVED: To provide a layered iron core wherein deviation in layer position between core pieces, reduction in space factor, and cracking in an iron core piece at the time of caulking portion formation are prevented, and excellent electromagnetic characteristics are obtained. SOLUTION: The layered iron core 1 is obtained by layering core pieces 10 and caulking the caulking portions k0, k1 formed on the core pieces 10. The caulking portion k1 is in such a shape that its width between a cut-down base portion k11' formed by cutting down part of a core piece and its tip k11a is gradually increased. The caulking portion k1 includes: a pair of caulking projections k11 symmetrically formed so that their portions on the tip k11a side are opposed to each other; and a recess k10 on the back side of the caulking projections formed by cutting down the caulking projections k11 or a caulking portion through hole in the same shape as the recess k10 on the back side of the caulking projections. When the core pieces 10 are caulked together, a pair of the caulking projections k11 are fit into the recess k10 on the back side of the caulking projections or the caulking portion through hole in the immediately lower core piece 10. COPYRIGHT: (C)2007,JPO&INPIT
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