Patent ID: 9556551
Date: 2017-01-31
CPC Classifications: D06F,H02K,Y10T

Claim:
1. A washing machine, comprising: a cabinet defining an outer appearance of the washing machine; a tub disposed within the cabinet; a main drum rotatably mounted in the tub; a sub drum mounted in the main drum and configured to rotate with respect to the main drum; an outer shaft configured rotate the main drum; an inner shaft configured to rotate the sub drum, the inner shaft being disposed inside the outer shaft; and a driving motor having a stator, an outer rotor connected to the inner shaft and rotatable outside the stator, and an inner rotor connected to the outer shaft and rotatable inside the stator, wherein the stator comprises an inner stator facing the inner rotor and an outer stator facing the outer rotor, and wherein each of the inner stator and the outer stator of the stator comprises: