Drum-brush and a vacuum cleaner having the same

Abstract

A drum brush having a drum rotation body, a pair of bearing holders, a pair of bearings, a shaft, a pair of end-caps and pressing rings, includes bristle tufts, and the pair of bearing holders are provided to be connected to or integrally formed with both ends of the drum rotation body. A pair of bearings, each having an inner race and an outer race, are connected to each of the bearing holders. The shaft penetrates each of the inner races of the bearings and is connected to the end-cap at either end. The pressing ring is interposed between each bearing holder and each bearing to prevent rotation of the outer race. Accordingly, when the drum rotation body rotates, the bearing holder is not damaged by frictional contact with the bearing.

1 . A drum brush comprising: 
 a drum rotation body comprising a plurality of bristle tufts disposed on the circumference thereof;    a bearing holder mounted at an end of the drum rotation body;    a bearing mounted in the bearing holder, the bearing comprising an outer race and an inner race;    a shaft inserted in the inner race of the bearing;    an end-cap connected to and supporting an end of the shaft; and    a pressing ring interposed between the bearing holder and the bearing.    
   
   
       2 . The drum brush of  claim 1 , wherein the bearing holder is integrally formed with the drum rotation body.  
   
   
       3 . The drum brush of  claim 1 , wherein the pressing ring comprises: 
 a body plate; and    at least one pressing protrusion formed on the body plate.    
   
   
       4 . The drum brush of  claim 1 , wherein the pressing ring comprises: 
 a body plate; and    at least one pressing protrusion formed on the body plate.    
   
   
       5 . The drum brush of  claim 3 , wherein the pressing protrusion protrudes toward an inner circumference of the pressing ring.  
   
   
       6 . The drum brush of  claim 1  further comprising at least one fixing protrusion formed toward an outer circumference of the pressing ring.  
   
   
       7 . The drum brush of  claim 1 , wherein the pressing ring is made of stainless steel.  
   
   
       8 . The drum brush of  claim 1 , wherein the bearing holder comprises a fixing rib formed therein, which is in tight contact with the outer race of the bearing.  
   
   
       9 . The drum brush of  claim 1 , wherein a locking groove is formed inside the end of the drum rotation body, and a corresponding locking protrusion is formed on an outer circumference of the bearing holder for insertion into the locking groove.  
   
   
       10 . A vacuum cleaner comprising a cleaner body having a vacuum generating device for generating a suction force, and a dust collection chamber for collecting dust, a suction port body having a suction port connected to the dust collection chamber, and a drum brush rotatably mounted to the suction port body, the drum brush comprising: 
 a drum rotation body having a plurality of bristle tufts disposed on the circumference thereof;    a bearing holder mounted at an end of the drum rotation body;    a bearing mounted in the bearing holder, the bearing having an outer race and an inner race;    a shaft inserted in the inner race of the bearing;    an end-cap connected to and supporting an end of the shaft, and being connected to the suction port body; and    a pressing ring interposed between the bearing holder and the bearing.    
   
   
       11 . The vacuum cleaner of  claim 10 , wherein the bearing holder is integrally formed with the drum rotation body.  
   
   
       12 . The vacuum cleaner of  claim 10 , wherein the pressing ring comprises: 
 a body plate; and    at least one pressing protrusion formed on the body plate.    
   
   
       13 . The vacuum cleaner of  claim 11 , wherein the pressing ring comprises: 
 a body plate; and    at least one pressing protrusion formed on the body plate.    
   
   
       14 . The vacuum cleaner of  claim 13 , wherein the pressing protrusion protrudes toward an inner circumference of the pressing ring.  
   
   
       15 . The vacuum cleaner of  claim 10 , further comprising at least one fixing protrusion formed toward an outer circumference of the pressing ring.  
   
   
       16 . The vacuum cleaner of  claim 10 , wherein the pressing ring is made of stainless steel.  
   
   
       17 . The vacuum cleaner of  claim 10 , wherein the bearing holder comprises a fixing rib formed therein, which is in tight contact with the outer race of the bearing.  
   
   
       18 . The vacuum cleaner of  claim 10 , wherein a locking groove is formed inside the end of the drum rotation body, and a corresponding locking protrusion is formed on an outer circumference of the bearing holder for insertion into the locking groove.