Patent ID: 7830064
Filing Date: 2010-11-09
Classification: H02K

Abstract:
1. A motor comprising: a stator unit including external stators and internal stators, which are respectively disposed in a ring shape and which are separated from each other in a radial direction; and a rotor unit including rotors, which are disposed in a ring shape and which are rotatably installed between the external stators and the internal stators, wherein the external stators and the internal stators are coils obtained by winding a wire, and wherein the rotors are permanent magnets; wherein the stator unit further includes an external bobbin having a ring shape and provided with a plurality of external teeth extended from the inner circumferential surface thereof to form the coils of the external stators, and an internal bobbin having a ring shape and provided with a plurality of internal teeth extended from the outer circumferential surface thereof to form the coils of the internal stators; and wherein the stator unit further includes a support frame having a ring shape and provided with an external support rib formed at the outer circumferential surface thereof to support the outer circumferential surface of the external bobbin and an internal support rib formed at the inner circumferential surface thereof to support the inner circumferential surface of the internal bobbin, and a stator fixing member formed by insert injection molding to fix the external stators and the internal stators under the condition that the external stators and the internal stators are installed on the support frame.