| 摘要 |
PROBLEM TO BE SOLVED: To combine a rotor body and a fitting member integrally in a small combining area and prevent occurrence of crack on a rotor body due to a thermal expansion difference between those components or the like. SOLUTION: A plurality of projections 24 placed on an opening portion of a fitting member 14 are fit into a cutout 16 of a rotor body 12 respectively and each leading end portion of the projections 24 is bent to the outside to hold the body 12 with an end portion of a cylindrical portion 26 then to combine the rotor body 12 integrally, and a combining area t1 in the axial direction and a combining area (C<SB>1</SB>, -R<SB>1</SB>) in the radial direction become smaller compared with when combining the body 12 with a bolt and a rivet, an outer diameter D<SB>1</SB>then becomes smaller by the amount of the area (C<SB>1</SB>-R<SB>1</SB>) having been reduced. Also, a relative displacement in the radial direction of both the projections 24 and the rotor body 12 is allowed because of the low rigidity of the combined portion made by bending each of the projections 24, which prevents occurrence of a crack on the rotor body 12 due to a thermal expansion difference. COPYRIGHT: (C)2004,JPO
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