Patent ID: 6677692
Filing Date: 2004-01-13
Classification: H02K

Abstract:
A rotor for an electric motor, comprising:a magnet having a rotation axis, said magnet being provided with a through hole having opposite open ends and extending coaxially with said rotation axis; a shaft fixed concentrically to said magnet, said shaft having a stepped outer surface and including a first portion fitted in said through hole, said first portion having an axial interengagement length from one of said opposite open ends that is in engagement with an inside surface of said through hole and that is shorter than an axial length of said through hole, a second portion thinner than and adjacent to said first portion and that is not in engagement with an inside surface of said through hole, and a toothed wheel adjacent to an end of said first portion opposite from said second portion; and reinforcing means provided at least inside said through hole for securely fixing said shaft in a predetermined position in said magnet.