Washing machine or dryer with a drive integrated on the tub and drum

Abstract

A drive configuration for a washing machine or a dryer contains a drum disposed rotatably in a tub. The tub is connected non-rotatably to a stator and the drum is connected non-rotatably to a rotor of an electric motor and the stator is disposed directly on the tub. The drive configuration has the stator disposed at a periphery of the tub, preferably near the center of the longitudinal extent thereof, and the rotor is disposed at the periphery of the drum in opposite relationship to the stator.

1 . A drive configuration for a washing machine or a dryer, the drive configuration comprising: 
 an electric motor having a stator and a rotor;    a tub connected non-rotatably to said stator and said stator disposed directly on said tub at a periphery of said tub; and    a drum disposed rotatably in said tub and connected non-rotatably to said rotor, said rotor disposed at a periphery of said drum in opposite relationship to said stator.    
   
   
       2 . The drive configuration according to  claim 1 , 
 wherein said tub has a peripheral wall and said stator projects through said peripheral wall into a free space defined between an inside of said tub and an outside of said drum; and    further comprising a seal for sealing off said stator in relation to said tub.    
   
   
       3 . The drive configuration according to  claim 1 , wherein said stator contains at least two stator segments which are disposed on a top side and an underside of said tub, said stator segments do not directly adjoin each other so that said stator does not form a closed ring.  
   
   
       4 . The drive configuration according to  claim 1 , 
 wherein said stator has poles; and    further comprising permanent magnets mounted in fixed positions on an outside diameter of said drum and are disposed in opposite relationship to said poles of said stator.    
   
   
       5 . The drive configuration according to  claim 3 , further comprising a machine casing housing said tub, said electric motor and said drum, a weight of said stator segments does not exert in any direction a tilting moment on said tub-drum combination which is suspended in sprung relationship with said machine casing.  
   
   
       6 . The drive configuration according to  claim 1 , wherein said stator contains stator poles having windings and a thin protective layer covering said stator poles with said windings.  
   
   
       7 . The drive configuration according to  claim 1 , wherein said stator contains stator poles having windings and an electrically insulating material covering said stator poles with said windings.  
   
   
       8 . The drive configuration according to  claim 4 , wherein said permanent magnets functioning as rotor poles are disposed on an outside diameter of said drum in a wet space under said stator poles.  
   
   
       9 . The drive configuration according to  claim 8 , further comprising an iron band holding said rotor poles, said iron band in a prefabricated condition is pushed onto said drum and functions as a magnetic return for said rotor poles.  
   
   
       10 . The drive configuration according to  claim 1 , wherein said stator is disposed near a center of a longitudinal extent of said tub.