Hand grinder, flange for accomodating a grinding tool, and balancing unit

Abstract

The invention is based on a handheld power grinder, having a motor located in a housing ( 10 ), having a receiving flange ( 30 ) receiving a grinding tool ( 12 ), and having a motor-driven working shaft ( 16 ) as well as a balancing unit ( 22 ) that has at least one first and one second balancing mass ( 18, 20 ). It is proposed that the first balancing mass is embodied as a movable balancing mass ( 18 ), and the second balancing mass is embodied as a fixed balancing mass ( 20 ). A receiving flange for a grinding tool ( 12 ) and a balancing unit are also proposed.

1 . A handheld power grinder, having a motor located in a housing: ( 10 ), having a receiving flange ( 30 ) receiving a grinding tool ( 12 ), and having a motor-driven working shaft ( 16 ) as well as a balancing unit ( 22 ) that has at least one first and one second balancing mass ( 18 ,  20 ), 
 characterized in that the first balancing mass is embodied as a movable balancing mass ( 18 ), and the second balancing mass is embodied as a fixed balancing mass ( 20 ).    
   
   
       2 . The handheld power grinder in accordance with  claim 1 , characterized in that the movable first balancing mass ( 18 ) is formed by balls ( 26 ) guided in a race ( 24 ).  
   
   
       3 . The handheld power grinder in accordance with  claim 1 , characterized in that the fixed second balancing mass ( 20 ) is formed by a balancing sector ( 28 ), which forms part of the circumference ( 42 ) of the balancing unit ( 22 ).  
   
   
       4 . The handheld power grinder in accordance with  claim 1 , characterized in that the receiving flange ( 30 ) for a grinding tool ( 12 ) has a grinding tool receptacle ( 32 ) that is eccentric to an axis of rotation ( 34 ).  
   
   
       5 . The handheld power grinder in accordance with  claim 1 , characterized in that the receiving flange ( 30 ) is a component of the balancing unit ( 22 ).  
   
   
       6 . The handheld power grinder in accordance with  claim 1 , characterized in that via the fixed second balancing mass ( 20 ), at least 10% of a grinding tool imbalance, in the new state of the grinding tool ( 12 ), can be compensated for.  
   
   
       7 . The handheld power grinder in accordance with  claim 1 , characterized in that the movable first balancing mass ( 18 ) is located on the side ( 40 ) of the balancing unit ( 22 ) facing away from the receiving flange ( 30 ).  
   
   
       8 . A receiving flange for a grinding tool for a handheld power grinder in accordance with  claim 1 , characterized in that an eccentric location of a grinding tool receptacle ( 32 ) is provided.  
   
   
       9 . The receiving flange in accordance with  claim 8 , characterized in that connecting means for a balancing unit ( 22 ) are provided.  
   
   
       10 . A balancing unit having at least two balancing masses ( 18 ,  20 ), characterized in that a movable first balancing mass ( 18 ) and a fixed second balancing mass are provided.  
   
   
       11 . The balancing unit in accordance with  claim 10 , characterized in that a receiving flange ( 30 ) for a grinding tool ( 12 ) is provided.  
   
   
       12 . The balancing unit in accordance with  claim 10 , characterized in that the movable first balancing mass ( 18 ) is formed by balls ( 26 ) guided in a race ( 24 ).  
   
   
       13 . The balancing unit in accordance with  claim 10 , characterized in that the movable first balancing mass ( 18 ) is formed by rings guided in a race ( 24 ).  
   
   
       14 . The balancing unit in accordance with  claim 10 , characterized in that the fixed second balancing mass ( 20 ) is formed by a balancing sector ( 28 ), which is part of the circumference ( 42 ) of the balancing unit ( 22 ).  
   
   
       15 . The balancing unit in accordance with  claim 14 , characterized in that the balancing sector ( 28 ) occupies an annular range (α) of 25% to 75% of the circumference ( 42 ).  
   
   
       16 . The balancing unit in accordance with  claim 14 , characterized in that the balancing sector ( 28 ) is located counter to a direction of eccentricity of the receiving flange ( 30 ).