Patent ID: 6700295
Filing Date: 2004-03-02
Classification: H02K,Y10T

Abstract:
A rotor of an electric motor comprising:a plurality of first core sheets, wherein each of said first core sheets includes a plurality of first teeth which are laid out in a ring form on a first plane, wherein each of said first teeth has a first winding portion extending in a radial direction of said rotor and each of said first teeth has a first arm portion integrally provided at an outer end of said first winding portion in said radial direction of said rotor and extending in a peripheral direction of said rotor, and wherein each of said first arm portions has a first coupling portion at one end; and a plurality of second core sheets, wherein each of said second core sheets includes a plurality of second teeth which are laid out in a ring form on a second plane, wherein each of said second teeth has a second winding portion extending in said radial direction of said rotor and each of said second teeth has a second arm portion integrally provided at an outer end of said second winding portion in said radial direction of said rotor and extending in said peripheral direction of said rotor, and wherein each of said second arm portions has a second coupling portion at one end, wherein said first core sheets and said second core sheets are stacked in an axial direction of said rotor, wherein each of said first teeth is stacked on an associated one of said second teeth in said axial direction of said rotor and each of said first teeth is coupled to one of said second teeth that is stacked on another one of said first teeth adjoining in said peripheral direction of said rotor by coupling of said first and second coupling portions, and wherein a remaining portion of each arm portion which excludes the associated coupling portion is located further apart from an axis of said rotor than the associated coupling portion.