Structure of driving unit in drum type washing machine

Abstract

Structure of a driving unit in a drum type washing machine including a tub for storing washing water, a drum of a metal rotatably mounted inside of the tub disposed horizontal to the ground, or with an angle to the ground for accommodating laundry therein, a shaft connected to the drum mounted inside of the tub through the tub for transmission of a driving force of the motor to the drum, bearings fitted onto outer circumferences of both end portions of the shaft for supporting the shaft, a bearing housing having stator fastening bosses at fixed intervals along a circumference of a central portion thereof for supporting the bearings, a stator having a plurality of magnetic cores each formed by stacking magnetic laminations each having a salient pole projected outward in a radial direction and a rib projected inward in a radial direction, both of which are formed as one unit, frames of insulating material for covering top and bottom surfaces of a magnetic core assembly of the magnetic cores, and coils each wound around each of the salient poles of the magnetic cores, a cup formed rotor having a rotor body of iron or iron alloy with a sidewall, a back yoke, forming a magnetic flux path and a rear wall formed as a unit with the sidewall, and permanent magnets fitted to a setting surface of an “L” formed bent portion of the sidewall, and a connector connecting the rotor and the shaft, thereby reducing noise and troubles as well as a power loss, to improve a productivity of the rotor and the product.

Description

[0001]This application is a Reissue application, filed Jan. 27, 2005, which is a Reissue of U.S. Pat. No. 6,510,716. More than one reissue application has been filed for the reissue of U.S. Pat. No. 6,510,716. The Reissue application numbers are Ser. Nos. 11 / 043,912 (the present Reissue application), 11 / 602,777, and 11 / 602,412.<?insert-end id="INS-S-00001" ?>BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a drum type washing machine, and more particularly, to a structure of a driving unit in a drum type washing machine.[0004]2. Background of the Invention[0005]In general, a drum type washing, making washing by using friction between a drum rotated by a motor and laundry in a state detergent, washing water, and the laundry are introduced into the drum, provides effects of beating and rubbing washing, but gives almost no damage to the laundry, and shows no entangling of the laundry. A structure of a related art drum washing machin...

AI Technical Summary

Benefits of technology

[0012]An object of the present invention is to provide a structure of driving unit in a drum type washing machine, in which the motor is coupled to the drum directly for reducing vibration, and either reducing a weight of the weight balancer or remove the weight balancer completely.

[0013]Another object of the present invention is to provide a structure of driving unit in a drum type washing machine, which can reduce waste of energy by employing a BLDC motor that has a good energy efficiency.

[0014]Other object of the present invention is to provide a structure of driving unit in a drum type washing machine, which involves no deformation of the rotor even if the rotor rotates at a high speed.

[0015]Further object of the present invention is to provide a structure of driving unit in a drum type washing machine, which permits an easy assembly of the drum washing machine.

Problems solved by technology

The imbalance caused by the motor mounted to a lower part of rear of the tub 2 causes heavy vibration when the motor is rotated.

In summary, the indirect driving power transmission from the motor 5a to the drum 3 through the motor pulley, the drum pulley, and the belt requires many repair, has much noise, waste of energy, and results in a deterioration of a washing capability.