Bearing device, in particular for a shaft of a turbocharger, and turbocharger having such a bearing device

Abstract

A bearing device ( 1 ), in particular for a shaft ( 2 ) of a turbocharger ( 3 ), including two journal bearings ( 5 ) and a bush-like separating element ( 9 ) for spatially separating the two bearings ( 5 ). The separating element ( 9 ) includes a separating bush which is formed in the manner of a cage having a multiplicity of apertures ( 16 ) arranged circumferentially and separated from one another by struts ( 17 ).

1 - 10 . (canceled) 
     
     
         11 . A bearing device comprising:
 two journal bearings; and   a separating bush for spatially separating the two bearings, the separating bush formed as a cage having a plurality of apertures arranged circumferentially and separated from one another by struts.   
     
     
         12 . The bearing device as recited in  claim 11  wherein the separating bush has a larger inner diameter than the two bearings. 
     
     
         13 . The bearing device as recited in  claim 11  wherein the apertures are bar-shaped. 
     
     
         14 . The bearing device as recited in  claim 11  wherein the apertures are configured such that their dimension in the direction of the longitudinal center axis of the shaft is at least a factor of 2 larger than their dimension perpendicular thereto. 
     
     
         15 . The bearing device as recited in  claim 14  wherein the factor is at least a factor of 5. 
     
     
         16 . The bearing device as recited in  claim 14  wherein the apertures are oriented parallel to a longitudinal center axis. 
     
     
         17 . The bearing device as recited in  claim 11  wherein at least 3 apertures are provided. 
     
     
         18 . The bearing device as recited in  claim 11  wherein the separating bush is a roller bearing cage. 
     
     
         19 . The bearing device as recited in  claim 18  wherein the roller bearing cage is a needle roller bearing cage. 
     
     
         20 . The bearing device as recited in  claim 11  wherein the separating bush is made as a single part. 
     
     
         21 . The bearing device as recited in  claim 11  wherein the two bearings and the separating element are fixed in position by an axial press-fit. 
     
     
         22 . A turbocharger comprising the bearing device as recited in  claim 11 . 
     
     
         23 . The turbocharger as recited in  claim 22  further comprising a shaft, the bearing device being for the shaft.