Patent ID: 6522044
Filing Date: 2003-02-18
Classification: H01R,H02K

Abstract:
A disc-type commutator for an electric rotating machine comprising:an insulating disc fixed to a rotating shaft of the electric rotating machine; a plurality of commutator segments disposed in contact with the insulating disc, each commutator segment being aligned to extend in a radial direction thereby forming a disc-shaped commutating surface which is perpendicular to an axial direction of the rotating shaft; and a segment gap formed between side surfaces of neighboring commutator segments, one end of the segment gap in the axial direction being open to the commutating surface and the other end being closed by the insulating disc, wherein: a width of the segment gap in a rotating direction of the commutator is gradually widened along a radial direction of the commutator so that the width is the narrowest at a radial inside and the widest at an radial outside of the commutator.