Rotary brush for vacuum cleaner

Abstract

A rotary brush for a vacuum cleaner comprises a drum 110 rotatably supported in a housing 21 of a brush assembly 20 and provided with bristles 111 on outer circumference, a bearing 120 including outer 122 and inner races 121 and having the outer race 122 press-fit in a groove 112 formed at an end of the drum 110, and a holder 130 having one side connected with the housing 21 and another side supporting the inner race 121 for the drum 110 to be rotatably supported in the housing 21. According to the present invention having the above-described structure, the number of parts can be reduced, thereby reducing the number of moving parts and also reducing the manufacturing costs.

What is claimed is:  
     
         1 . A rotary brush assembly for insertion into a housing of a vacuum cleaner comprising: 
 a drum, rotatably supported in the housing of the brush assembly, provided with bristles along an outer circumference;    a bearing, including outer and inner races, having the outer race press-fit in a groove formed at an open end of the drum; and    a drum holder having one side connected to the housing and another side supporting the inner race of the drum to be rotatably supported in the housing.    
     
     
         2 . The rotary brush according to  claim 1 , wherein the drum holder further comprises a covering portion covering the end of the drum for preventing contaminants from entering into the bearing.  
     
     
         3 . The rotary brush according to  claim 1 , wherein a supporting portion press-fit in the inner race of the bearing is provided on inwardly facing, proximal surface of the holder.  
     
     
         4 . The rotary brush according to  claim 3 , wherein a supplementary metallic member is inserted into the supporting portion.  
     
     
         5 . The rotary brush according to  claim 1 , wherein a fixing protrusion provided on a distal, outwardly facing surface of the holder is inserted and fixed in a receiving recess formed in the housing.  
     
     
         6 . The rotary brush according to  claim 1 , wherein the holder comprises: 
 a cover covering an open end of the drum for preventing contaminants from entering into the bearing; and    a supporting shaft having one end passing through the cover and press-fit into the receiving recess formed on the housing and another end press-fit into the inner race of the bearing.    
     
     
         7 . The rotary brush for a vacuum cleaner according to  claim 1 , wherein a belt connecting portion connected with a driving belt for rotating the drum is provided at one side of the outer circumference of the drum.