Claw pole comprising a centering point

Abstract

The invention relates to an electrical machine ( 10 ), especially a three-phase generator for vehicles. The electrical machine ( 10 ) comprises a stator ( 16 ) and a rotor ( 20 ). The rotor ( 20 ) comprises a first and a second claw pole ( 22, 23 ) from which claw pole fingers ( 24 ) respectively extend in the axial direction from claw pole roots ( 60 ). A centring point ( 74 ) for a tool is located on a rear radius ( 72 ) of the claw pole roots ( 60 ).

1 . An electric machine ( 10 ) having a stator ( 16 ) and a rotor ( 20 ) which comprises a first and a second claw pole ( 22 ,  23 ), from which in each case claw pole fingers ( 24 ,  25 ) extend in an axial direction from claw pole roots ( 60 ), characterized in that a centering means ( 74 ) for a tool is formed on a back radius ( 72 ) of each of the claw pole roots ( 60 ). 
     
     
         2 . The electric machine ( 10 ) as claimed in  claim 1 , characterized in that the centering means ( 74 ) can be positioned along the back radius ( 72 ). 
     
     
         3 . The electric machine ( 10 ) as claimed in  claim 1 , characterized in that the centering means ( 74 ) is a centering point. 
     
     
         4 . The electric machine ( 10 ) as claimed in  claim 1 , characterized in that the centering means ( 74 ) is a sphere. 
     
     
         5 . The electric machine ( 10 ) as claimed in  claim 1 , characterized in that the centering means ( 74 ) defines a drilling angle range ( 78 ) which corresponds to an angle of aperture. 
     
     
         6 . The electric machine ( 10 ) as claimed in  claim 2 , characterized in that the centering means ( 74 ) is located on the back radius ( 72 ) within the claw pole roots ( 60 ). 
     
     
         7 . A three-phase current generator for vehicles, having a stator ( 16 ) and a rotor ( 20 ) which comprises a first and a second claw pole ( 22 ,  23 ), from which in each case claw pole fingers ( 24 ,  25 ) extend in an axial direction from claw pole roots ( 60 ), characterized in that a centering means ( 74 ) for a tool is formed on a back radius ( 72 ) of each of the claw pole roots ( 60 ). 
     
     
         8 . The electric machine ( 10 ) as claimed in  claim 7 , characterized in that the centering means ( 74 ) can be positioned along the back radius ( 72 ). 
     
     
         9 . The electric machine ( 10 ) as claimed in  claim 7 , characterized in that the centering means ( 74 ) is a centering point. 
     
     
         10 . The electric machine ( 10 ) as claimed in  claim 7 , characterized in that the centering means ( 74 ) is a sphere. 
     
     
         11 . The electric machine ( 10 ) as claimed in  claim 7 , characterized in that the centering means ( 74 ) defines a drilling angle range ( 78 ) which corresponds to an angle of aperture. 
     
     
         12 . The electric machine ( 10 ) as claimed in  claim 8 , characterized in that the centering means ( 74 ) is located on the back radius ( 72 ) within the claw pole roots ( 60 ).