Drive device for a front-loading washing machine

Details Drive device for a front-loading washing machine Drive device for a front-loading washing machine

1998-06-10

1999-12-07

Coe, Philip R.

Textiles: fluid treating apparatus

Machines

Tumbling

D06F 3730

Patent

active

059963794

ABSTRACT:
A front-loading washing machine includes a tub having a rear wall, an at least approximately horizontally disposed shaft, a laundry drum mounted overhung on the shaft, and a rigid supporting part fitted to the rear wall. A drive device for the washing machine includes a flat-type motor fitted to the rear wall for directly driving the shaft. The motor has a rotor formed entirely of magnetizable steel and a stator connected on the rigid supporting part or to the rear wall of the tub. The rotor has a hub encompassing and centrally fastened on an outer end of the shaft, a multiplicity of openings between the hub and a peripheral part, and a bell-like flange on the peripheral part pointing toward the tub. The stator has a central bearing sleeve for the shaft and for the hub and it has exciter windings. Laminate stacks are distributed on the stator for receiving the windings. The stacks are outwardly opposed by the flange with an air gap. The direct drive device for the drum provides good capability of cooling the windings with ambient air, so that the flat, slowly rotating motor cannot overheat during proper operation when dimensioned according to requirements. In addition, the motor can be fully preassembled at its manufacturer's plant.

REFERENCES:
patent: 4446706 (1984-05-01), Hartwig
patent: 5809809 (1998-09-01), Neumann
patent: 5862686 (1999-01-01), Skrippek

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