Rotor of magnetogenerator and method of manufacturing it

摘要

First expanded parts (37) formed by expansion of a tubular wall of a cover (30) outwards in the radial direction are formed between adjacent magnets (20), so that the magnets (20) are fixed in the radial direction. In the axial direction, a bottom part (31) of the cover (30) is expanded outwards in the radial direction in a state in which an outer collet (32) of the cover (30) is placed in abutting contact with vertex faces (25) of the magnets (20), so that a second expanded part (38) is formed in a space lying between the bottom wall (14) of the yoke (11) and parts of the end faces of the magnets on the bottom wall (14)-side of the yoke. Application particularly to magnetogenerators of small vehicles.