Patent ID: 9048715
Filing Date: 2015-06-02
Classification: H02K,Y10T

Abstract:
1. A rotor of a motor, comprising: a rotor shaft; a ring-shaped rotor magnet disposed coaxially with the rotor shaft; and a cover composed of a non-magnetic metal and formed into a cylindrical shape, the cover covering an outer circumference of the rotor magnet, wherein the rotor magnet and the cover are integral-molded with molding resin in a state where an outer circumference of the cover is exposed and both end parts and an inner circumference of the rotor magnet are covered with the molding resin, the rotor magnet is press-fit in the cover in a state where one axial end of the rotor magnet contacts a flange, which is formed in one end part of the cover, and the other axial end surface of the rotor magnet is flush with the other end surface of the cover, and a plurality of grooves are radially formed, at regular intervals, in the other axial end surface of the rotor magnet so as to improve bonding strength between the rotor magnet and the molding resin.