Handheld power tool

Abstract

The invention is based on a handheld power tool having a motor ( 10 ), a planetary gear ( 12 ) and a tool receptacle ( 4 ). It is proposed that the handheld power tool includes an air-moving means ( 46, 78 ), located upstream the motor ( 10 ), out of sight of the tool receptacle (4), for generating a cooling air stream that cools the planetary gear ( 12 ).

1 . A handheld power tool having a motor ( 10 ), a planetary gear ( 12 ) and a tool receptacle ( 4 ), characterized by an air-moving means ( 46 ,  78 ), located upstream the motor ( 10 ), out of sight of the tool receptacle ( 4 ), for generating a cooling air stream that cools the planetary gear ( 12 ).  
   
   
       2 . The handheld power tool as defined by  claim 1 , characterized in that the air-moving means ( 46 ,  78 ) is integrated with the planetary gear ( 12 ).  
   
   
       3 . The handheld power tool as defined by  claim 1 , characterized in that the air-moving means ( 46 ,  78 ) is located between the motor ( 10 ) and a gear stage of the planetary gear ( 12 ).  
   
   
       4 . The handheld power tool as defined by  claim 1 , characterized in that the air-moving means ( 46 ,  78 ) is provided for generating a cooling air stream flowing through the planetary gear ( 12 ).  
   
   
       5 . The handheld power tool as defined by  claim 1 , characterized by a housing having at least one first and one second ventilation opening ( 66 ,  68 ) and at least one ventilation conduit, which extends continuously from the first ventilation opening ( 68 ) through the planetary gear ( 12 ) to the second ventilation opening ( 66 ).  
   
   
       6 . The handheld power tool as defined by  claim 1 , characterized by a coupling region ( 38 ) and at least one ventilation conduit that extends continuously from the coupling region ( 38 ) to the motor ( 10 ).  
   
   
       7 . The handheld power tool as defined by  claim 1 , characterized in that the air-moving means ( 46 ,  78 ) is located in the immediate vicinity of a gear wheel of the planetary gear ( 12 ).  
   
   
       8 . The handheld power tool as defined by  claim 1 , characterized in that the air-moving means ( 46 ,  78 ) is rotatable in two directions of rotation and in both directions of rotation generates an air stream in the same direction.  
   
   
       9 . The handheld power tool as defined by  claim 1 , characterized in that the air-moving means ( 78 ) has blades ( 86 ) with at least two blade faces ( 88 ,  90 ), and one blade face ( 88 ), in a first direction of rotation, directs the air at least partly in an axial direction ( 54 ), and the other blade face ( 90 ), in a second direction of rotation opposite the first direction of rotation, directs the air at least partly in the same axial direction ( 54 ).  
   
   
       10 . The handheld power tool as defined by  claim 1 , characterized in that the air-moving means ( 46 ,  78 ) generates an air stream directed in the radial direction ( 58 ) and includes a deflection means for deflecting the air stream in the axial direction ( 54 ).