Patent ID: 6362551
Filing Date: 2002-03-26
Classification: F04D,H02K

Abstract:
A motor rotor comprising:a rotor casing made of plastic material by injection molding and having a peripheral wall with a central shaft at a center thereof, a top of the rotor casing having an annular groove for receiving adhesive and a plurality of ribs separating the annular groove into independent grooves; a metal ring formed by means of bending a strip of metal plate, the metal ring including two ends that have a gap therebetween, the metal ring having resiliency to exert a radially expanding force to and thus being in tight contract with an inner periphery of the peripheral wall of the casing, the ribs supporting the metal ring, thereby preventing it falling into the groove; and a magnet ring mounted to an inner periphery of the metal ring, the ribs supporting the magnet ring, thereby preventing it falling into the groove.