Patent ID: 7418843

Claim:
A drum type washing machine comprising: a tub of plastic having a wall for holding washing water therein and mounting a driving part thereon, wherein at least a portion of a tub rear wall having an inner surface and an outer surface; a drum rotatably arranged inside of the tub; a shaft passed through the tub and connected to the drum for transmission of a driving power from a motor to the drum; at least one bearing for supporting the shaft; a bearing housing having a sleeve form of bearing supporting part, and a stator fastening part extended in a radial direction from the bearing supporting part, where the stator fastening part is made of a material that is different from a material of the tub rear wall, and both of the bearing supporting part and the stator fastening part are disposed between the inner surface and the outer surface of the tub rear wall, while stator fastening holes in the stator fastening part are exposed from the outer surface of the tub rear wall; a rotor engaged to a rear end part of the shaft to form the motor together with the stator; and the stator mounted on the stator fastening part of the bearing housing with fastening members on an inner side of the rotor to form the motor together with the rotor, and the outer surface of the tub rear wall is between the stator and the stator fastening part, wherein the stator includes; an annular helical type core having multiple layers formed by winding a steel plate having tooth portions and a base part in a helix starting from a bottom layer to a top layer, an insulator having the helical type core encapsulated therein, a coil wound on the tooth portions, and fastening parts formed with the insulator, wherein fastening holes are at portions of the fastening parts projected toward an inside of the helical type core for fastening the stator to the bearing housing.