Patent ID: 7441423

Claim:
A drum type washing machine, comprising: a tub installed in a cabinet, the tub comprising plastic; a bearing housing mounted to a closed rear wall of the tub by an insert injection molding, wherein the bearing housing comprises metal and includes a cylindrical aperture therethrough; at least one bearing mounted in the bearing housing; a shaft mounted on the at least one bearing; a drum rotatably installed in the tub and coupled to the shaft such that the shaft can transmit a driving force to the drum; a stator coupled to the rear wall of the tub; and a rotor directly coupled to the shaft, wherein the rotor surrounds an outer circumference of the stator, and wherein the rotor includes a rear wall and a cylindrical sidewall made of one of steel and steel alloy plate wherein the cylindrical sidewall extends from a periphery of the rear wall, and wherein a bent portion is formed along a circumference of the sidewall, the bent portion including sitting surfaces configured to receive magnets.