Support plate for bearings

Abstract

The invention relates to a support device ( 60 ) for fixing a bearing ( 28 ) on a bearing shield ( 13.1, 13.2 ) of a housing ( 13 ) of an electric machine ( 10 ). Rotatably mounted in the support device is a rotor ( 20 ) with a shaft ( 27 ). The support device ( 60 ) is substantially flat and comprises a plurality of fastening openings ( 62 ) that are grouped about a central opening ( 64 ). The support device ( 60 ) comprises at least one design break point ( 66, 68; 72, 74; 76, 78; 92 ) that acts to provide a local limit to the excess stresses in the material of the support device ( 60 ).

1 . A support device ( 60 ) for fixing a bearing ( 28 ) on a bearing plate ( 13 . 1 ,  13 . 2 ) of a housing ( 13 ) of an electric machine ( 10 ), in which a rotor ( 20 ) is rotatably mounted with a shaft ( 27 ), and the support device ( 60 ) is of substantially plate-shaped configuration and has a number of fastening openings ( 62 ) which are arranged around an opening ( 64 ), characterized in that the support device ( 60 ) has at least one predetermined break point ( 66 ,  68 ;  72 ,  74 ;  76 ,  78 ;  92 ) which brings about locally delimited excessive loadings. 
     
     
         2 . The support device ( 60 ) as claimed in  claim 1 , characterized in that at least one predetermined break point ( 66 ,  68 ;  72 ,  74 ) is configured as a notch. 
     
     
         3 . The support device ( 60 ) as claimed in  claim 1 , characterized in that at least one predetermined break point ( 76 ,  78 ) is configured as an aperture in the material of the support device ( 60 ). 
     
     
         4 . The support device ( 60 ) as claimed in  claim 2 , characterized in that at least one predetermined break point ( 92 ) is configured as a notch on a planar side ( 94 ,  96 ) of the support device ( 60 ). 
     
     
         5 . The support device ( 60 ) as claimed in  claim 2 , characterized in that at least one predetermined break point ( 66 ,  68 ;  72 ,  74 ) is configured on an external circumference of the support device ( 60 ). 
     
     
         6 . The support device ( 60 ) as claimed in  claim 2 , characterized in that a number of predetermined break points ( 66 ,  68 ;  72 ,  74 ) are configured on at least one of an external circumference and an internal diameter ( 80 ) of the central opening ( 64 ). 
     
     
         7 . The support device ( 60 ) as claimed in  claim 2 , characterized in that the support device is configured with a variable thickness ( 82 ,  84 ). 
     
     
         8 . The support device ( 60 ) as claimed in  claim 7 , characterized in that the support device has a tapered section ( 84 ), in which plastically deformable webs ( 86 ) extend. 
     
     
         9 . The support device ( 60 ) as claimed in  claim 2 , characterized in that at least one predetermined break point ( 66 ,  68 ;  72 ,  74 ;  92 ) which is configured as a notch has a stress concentration factor of K t >2.0. 
     
     
         10 . The support device ( 60 ) as claimed in  claim 6 , characterized in that at least two predetermined break points ( 66 ,  68 ;  72 ,  74 ) are arranged so as to lie opposite one another on at least one of the external circumference and the internal diameter ( 80 ) of the central opening ( 64 ). 
     
     
         11 . The support device ( 60 ) as claimed in  claim 6 , characterized in that at least two predetermined break points ( 66 ,  68 ;  72 ,  74 ) lie on the external circumference of the support device ( 60 ), one at the 6 o'clock position and one at the 12 o'clock position, or on the external circumference, one at the 3 o'clock position and one at the 9 o'clock position. 
     
     
         12 . The support device ( 60 ) as claimed in  claim 11 , characterized in that at least two predetermined break points ( 66 ,  68 ;  72 ,  74 ) lie on the internal diameter ( 80 ) of the central opening ( 64 ), one at the 6 o'clock position and one at the 12 o'clock position, or on the internal diameter ( 80 ) of the central opening ( 64 ), one at the 3 o'clock position and one at the 9 o'clock position. 
     
     
         13 . The support device ( 60 ) as claimed in  claim 6 , characterized in that at least two predetermined break points ( 66 ,  68 ;  72 ,  74 ) lie on the internal diameter ( 80 ) of the central opening ( 64 ), one at the 6 o'clock position and one at the 12 o'clock position, or on the internal diameter ( 80 ) of the central opening ( 64 ), one at the 3 o'clock position and one at the 9 o'clock position.