Attachment for a hand-held power tool

Abstract

An attachment for at least rotary hand-held power tool includes a tool holder ( 13 ) for receiving a working tool and extending into the power tool outer housing ( 12 ), a coupling section ( 14, 34 ) for connection with a drive shaft ( 2 ) of the at least rotary hand-held power tool ( 1 ), and a ventilation device arranged in the outer housing ( 12 ).

1 . An attachment for at least a rotary hand-held power tool, comprising a outer housing ( 12 ); a tool holder ( 13 ) for receiving a working tool and extending into the outer housing ( 12 ); a coupling section ( 14 ,  34 ) for connection with a drive shaft ( 2 ) of the at least rotary hand-held power tool ( 1 ); and a ventilation device arranged in the outer housing ( 12 ).  
   
   
       2 . An attachment according to  claim 1 , wherein at least one outlet opening ( 22 ) is provided in the outer housing ( 12 ).  
   
   
       3 . An attachment according to  claim 1 , wherein at least one inlet opening ( 21 ) is provided in the outer housing ( 12 ).  
   
   
       4 . An attachment according to  claim 1 , wherein the ventilation device comprises at least one rotatable blower wheel ( 17 ,  18 ;  37 ).  
   
   
       5 . An attachment according to  claim 4 , wherein the blower wheel ( 17 ,  37 ) is mounted on the coupling section ( 14 ,  34 ) for joint rotation therewith.  
   
   
       6 . An attachment according to  claim 1 , further comprising, in addition to the coupling section ( 14 ), a further drive shaft ( 15 ).  
   
   
       7 . An attachment according to  claim 6 , wherein the ventilation device comprises two blower wheels ( 17 ,  18 ) mounted, respectively, on the coupling section ( 14 ) and the further drive shaft ( 15 ).