Axle bearing apparatus

Abstract

An axle bearing apparatus includes a hub shaft including a wheel-mounting flange formed at its outer end portion, and a cylindrical portion formed on an inner side surface of the flange, a bearing portion press-fitted on the cylindrical portion of the hub shaft and including an inner ring, an outer ring and rolling elements disposed between the inner and outer rings, and a slinger having a through hole formed through its central portion. The through hole is fitted on the cylindrical portion such that an outer diameter of the slinger is generally equal to an outer diameter of the flange, and the slinger is press-clamped to the inner side surface of the flange by bolts press-fitted respectively in a plurality of bolt holes formed in the flange. An adhesive bonds the slinger to the flange.

1 . An axle bearing apparatus comprising:
 a hub shaft that includes a wheel-mounting flange formed at an outer side thereof and a cylindrical portion formed on an inner side thereof, a plurality of bolt holes being formed through the flange;   a bearing portion that is press-fitted on the cylindrical portion of the hub shaft and includes an inner ring, an outer ring and rolling elements disposed between the inner and outer rings;   a slinger that includes a through hole formed through a central portion thereof and has an outer diameter generally equal to an outer diameter of the flange, wherein the through hole is fitted on the cylindrical portion, and the slinger is press-clamped to an inner side surface of the flange by bolts press-fitted respectively in the plurality of bolt holes; and   an adhesive that bonds the slinger to the flange.   
   
   
       2 . The axle bearing apparatus according to  claim 1 , wherein the slinger includes a rib that is formed at an outer periphery thereof and is fitted to an outer periphery of the flange. 
   
   
       3 . An axle bearing apparatus comprising:
 a hub shaft that includes a wheel-mounting flange formed at an outer side thereof and a cylindrical portion formed on an inner side thereof, a plurality of bolt holes being formed through the flange;   a bearing portion that is press-fitted on the cylindrical portion of the hub shaft and includes an inner ring, an outer ring and rolling elements disposed between the inner and outer rings;   a slinger that includes a through hole formed through a central portion thereof and has an outer diameter generally equal to an outer diameter of the flange, wherein the through hole is fitted on the cylindrical portion, and the slinger is press-clamped to an inner side surface of the flange by bolts press-fitted respectively in the plurality of bolt holes;   a seal member interposed between the flange and the slinger; and   ring-shaped grooves configured to receive the seal member in an inner side surface of the flange in concentric relation to each other, the ring-shaped grooves being disposed respectively at inner and outer peripheral sides of the bolt holes.   
   
   
       4 . The axle bearing apparatus according to  claim 3 , wherein the slinger includes a rib that is formed at an outer periphery thereof and is fitted to an outer periphery of the flange. 
   
   
       5 . An axle bearing apparatus comprising:
 a hub shaft that includes a wheel-mounting flange formed at an outer side thereof and a cylindrical portion formed on an inner side thereof, a plurality of bolt holes being formed through the flange;   a bearing portion that is press-fitted on the cylindrical portion of the hub shaft and includes an inner ring, an outer ring and rolling elements disposed between the inner and outer rings;   a slinger that includes a through hole formed through a central portion thereof and has an outer diameter generally equal to an outer diameter of the flange, wherein the through hole is fitted on the cylindrical portion, and the slinger is press-clamped to an inner side surface of the flange by bolts press-fitted respectively in the plurality of bolt holes;   means for sealing between the flange and the slinger; and   ring-shaped grooves configured to receive the means for sealing in an inner side surface of the flange in concentric relation to each other, the ring-shaped grooves being disposed respectively at inner and outer peripheral sides of the bolt holes.   
   
   
       6 . The axle bearing apparatus according to  claim 5 , wherein the means for sealing includes an O-ring interposed between the flange and the slinger. 
   
   
       7 . The axle bearing apparatus according to  claim 5 , wherein the means for sealing includes an adhesive that bonds the slinger to the flange. 
   
   
       8 . The axle bearing apparatus according to  claim 5 , wherein the means for sealing includes a seal member interposed between the flange and the slinger. 
   
   
       9 . The axle bearing apparatus according to  claim 3 , wherein the seal member comprises one of a plurality of seal members.