Package bearing.

摘要

The package bearing (A) for coupling a road wheel (C) to the suspension system of an automotive vehicle includes a nonrotatable outer bearing ring (12) having flanges (20) along which it is attached to the suspension system, a rotatable inner bearing ring (14) located within the outer ring (12) and having a flange (72) to which the road wheel (C) is attached, and tapered rollers (16, 18) arranged in two rows between the outer and inner rings (12, 14). The rollers (16, 18) contact the rings (12, 14) along inboard and outboard raceways (26, 28, 46, 48) that are likewise tapered, their large ends being at the ends of the two rings (12, 14). The large ends of rollers (18) on the outboard row move along a rib at the flange (72) on the inner ring (14), while the large ends of the rollers (16) of the inboard row move along a rib ring (60) that is formed as a separate element and subsequently connected to one of the rings (12, 14). Between its inboard and outboard raceways (46, 48) the inner ring (14) has a cylindrical intervening surface (50), the diameter of which exceeds the largest diameter on the inboard raceway (46) of the inner ring (14). This enables an encoder ring (52) to advance over the inboard raceway (46), and to be pressed over the intervening surface (50) to its final position. Thereafter the rib ring (60) is secured against one of the rings (12, 14) at the large end of the inboard raceway on that ring. During assembly, the rollers (16) of the inboard row are likewise advanced over the large end of the inboard raceway (46) for the inner ring (14), all while confined in a cage (94) - but the cage (94) has breaks in its small end ring to enable it to expand and accommodate the large end of the raceway (46). The outer ring (12) carries a sensor (34) which monitors the encoder ring (52), producing an electrical signal, the frequency of which reflects the angular velocity of the encoder ring (52). Seals (96, 98) close the annular space between the bearing rings (12, 14) at the inboard and outboard ends of the rings (12, 14).