Patent ID: 9048712
Filing Date: 2015-06-02
Classification: H02K

Abstract:
1. A motor comprising: a stator comprising stator cores and coils wound around the stator cores; a rotor to co-operate with the stator in an electromagnetic manner such that the rotor rotates; and a motor shaft coupled to the rotor, to rotate along with the rotor, wherein the rotor comprises: a sleeve having a shaft hole, through which the motor shaft extends; a plurality of rotor cores arranged to be spaced apart from one another in a circumferential direction of the rotor, at least one of the rotor cores having a through hole; at least one of permanent magnets disposed between adjacent ones of the rotor cores such that the permanent magnets are arranged in a radial manner about the sleeve; first and second cover plates disposed at opposite sides of the permanent magnets in an axial direction, the first and second cover plates having a plurality of plate holes respectively corresponding to the through holes of the rotor cores; and at least one of fastening members coupled to a corresponding one of the rotor cores and the first and second cover plates, at least one of the fastening members comprising a body inserted into the through hole of the corresponding rotor core, and a first head provided at a leading end of the body in an insertion direction of the body into the rotor core, the first head being supported by an outer surface of the first cover plate after passing through a corresponding one of the plate holes of the first cover plate when the fastening member is coupled to the rotor.