ROTOR, METHOD OF MANUFACTURING ROTOR, AND MOTOR

摘要

The magnet groups are arranged one above the other along a rotation axis such that the magnets in each magnet group are circumferentially displaced from the magnets in the other magnet group by a predetermined step angle. The rotor cover includes a recessed dividing portion arranged to be depressed radially inward into an interspace between the magnet groups; a plurality of support regions each arranged in contact with a separate one of the magnets; and a pair of collar portions arranged to project radially inward from both end portons of the rotor cover. The support regions are arranged to circumferentially retain the corresponding magnets, while the pair of collar portions and the recessed dividing portion are arranged to together axially retain the magnet groups.