Abstract: An outer rotor electric motor is provided in which a rotor having a rotor case and a plurality of permanent magnets fixed to an inner periphery of the rotor case is disposed so as to cover a stator, and an end part of a rotating shaft is fastened to the end wall by a fastening member having part thereof exposed to an exterior from an upper face of the end wall of the rotor case, wherein a plurality of cooling blades are provided with the end wall so as to extend radially while projecting downward from of the end wall, radially extending grooves for discharging water are formed in the end wall so as to individually correspond to the cooling blades, and a plurality of cooling air discharge holes that discharge air from the cooling blade are formed in the side wall of the rotor case.

Abstract: An outer rotor type electric motor is provided in which a ring-shaped yoke made of a magnetic metal is secured to an inner periphery of a plate-shaped rotor case, and includes a rotor in which a resin bonded permanent magnet is mold bonded to an inner peripheral face of the yoke, wherein an engagement portion (25a) that bites into and engages with the rotor case (23A) is formed integrally with and connected to the resin bonded permanent magnet (25). This can reliably prevent relative rotation of a resin bonded permanent magnet with respect to a rotor case when a rotor is rotating.

Abstract: An outer rotor electric motor is provided in which a rotor having a rotor case and a plurality of permanent magnets fixed to an inner periphery of the rotor case is disposed so as to cover a stator, and an end part of a rotating shaft is fastened to the end wall by a fastening member having part thereof exposed to an exterior from an upper face of the end wall of the rotor case, wherein a plurality of cooling blades are provided with the end wall so as to extend radially while projecting downward from of the end wall, radially extending grooves for discharging water are formed in the end wall so as to individually correspond to the cooling blades, and a plurality of cooling air discharge holes that discharge air from the cooling blade are formed in the side wall of the rotor case.