Patent ID: 7569968
Filing Date: 2009-08-04
Classification: H02K,Y10T

Abstract:
1. A rotor for a vehicular electric rotary machine, comprising: a rotary shaft; front and rear pole cores with cylindrical boss portions carried on the rotary shaft adjacent to each other, front and rear disc portions radially extending from axial ends of the boss portions, respectively, a field coil carried by the boss portions, and front and rear claw-shaped pole portions axially extending from outer peripheries of the front and rear disc portions in axially opposite directions so as to mate with each other; a plurality of permanent magnets each disposed between circumferentially adjacent claw-shaped poles; and a plurality of magnet holding members, each made of metallic material, each of which covers an outer top surface of each permanent magnet and circumferential sidewalls of each of the permanent magnets, respectively; wherein each of the front and rear disc portions includes axially extending stepped portions to retain axial end faces of each permanent magnet and each magnet holding member in axially and radially fixed relationship; wherein each of the stepped portions includes an opposed portion facing axial ends and radially inward ends of each of the permanent magnets and each of the magnet holding members; and wherein each of the permanent magnets is held in a position radially spaced from an outer circumferential periphery of the field coil.