| 摘要 |
A press-fitting structure is provided in which when a press-fitting face (12a) of a rotor yoke (12) formed from a laminated steel sheet is press fitted onto a face to be press-fitted (13a) of a rotor shaft (13), fitting is carried out with plastic deformation while the first projection (15) of a press-fitting face (12a) of a rotor yoke (12), on which a first projection (15) and a first recess (16) extending in substantially the press-fitting direction are formed in turn, and the second projection (17) of the face to be press-fitted (13a) of the rotor shaft (13), on which a second projection (17) and a second recess (18) extending in the direction intersecting the press-fitting direction are formed in turn, are in contact with each other. Since in a state in which press fitting is completed, the amount of plastic deformation of the second projection (17) of the rotor shaft (13) is larger than the amount of plastic deformation of the first projection (15) of the rotor yoke (12), by allowing the first and second projections to mesh with each other, a shear force due to plastic meshing can also be imparted in addition to a frictional force between the press-fitting faces while reducing the residual stress of the rotor yoke (12) and minimizing any degradation of the magnetic characteristics, and it is therefore possible to carry out fixing strongly so that relative movement is impossible. |
