Asymmetric hub assembly

Abstract

A hub bearing assembly comprising a hub having a radially outwardly directed flange at one axial end for mounting the wheel of a vehicle, an outer ring having axially spaced raceways and a plurality of rolling elements arranged in two rows in the annular space between the outer ring and the hub, the diameter of the pitch circle of the outboard row of rolling elements adjacent said flange being greater than the diameter of the pitch circle of the rolling elements in the inboard row.

1 . A hub bearing assembly comprising a hub ( 12 ) rotational about an axis (A-A) having a radially outwardly directed flange ( 16 ) at one axial end for mounting the wheel of a vehicle, an outer ring ( 26 ) having axially spaced raceways ( 22 ,  24 ) and a plurality of tapered rollers arranged in two rows R i , R o  in the annular space between the outer ring ( 26 ) and the hub ( 12 ), the diameter Do of the pitch circle of the outboard row R o  of tapered rollers adjacent said flange being greater than the diameter D i  of the pitch circle of the tapered rollers in the inboard row R i  wherein the contact angle of the inner and outer rows of rolling elements intersect the rotational axis (A-A) of the hub ( 12 ) at pressure centers P i  and P o  which lie outside the flange ( 16 ) at the outboard end of the hub assembly and outside the hub at the inboard side to provide enhanced performance including higher load carrying capability and better distribution of the load on the bearings.  
   
   
       2 . A hub bearing assembly comprising a hub having a radially outwardly directed flange at one axial end for mounting the wheel of a vehicle, an outer ring having axially spaced raceways and a plurality of rolling elements arranged in two rows in the annular space between the outer ring and the hub, the diameter of the pitch circle of the outboard row of rolling elements adjacent said flange being greater than the diameter of the pitch circle of the rolling elements in the inboard row wherein the contact angle of the inner and outer rows of rolling elements intersect the rotational axis (A-A) of the hub ( 12 ) at pressure centers P i  and P o  which lie outside the flange ( 16 ) at the outboard end of the hub assembly and outside the hub at the inboard side to provide enhanced performance including higher load carrying capability and better distribution of the load on the bearings