Flanged bearing ring for a motor vehicle wheel bearing unit

摘要

A flanged bearing ring is formed of two different materials joined together as a single piece, specifically a radially inner annular insert and a flanged, radially outer lightweight body formed about the insert. The insert has one or more inner raceways and is formed of a hard material, such as bearing steel. The outer body is made of a lightweight material, such as aluminum alloy, with a higher thermal expansion coefficient higher than that of the hard material from which the inner insert is formed. A radial projection formed on the outer body extends into a radial recess or groove of the insert. The projection and the recess interlock the insert and the outer body so as to prevent relative movement.

主权项

1. A flanged bearing ring for a motor vehicle wheel, the ring comprising:
a radially inner, generally annular insert formed of a first material with a first thermal expansion coefficient, the insert having a central axis, at least one raceway extending about the axis, a radially outer surface, and at least one recess extending generally radially inwardly from the outer surface; and a radially outer body formed of a second material with a second thermal expansion coefficient, the second coefficient being greater than the first coefficient, the outer body being disposed about the insert and having a radially outwardly extending flange and at least one radially inwardly extending projection disposed within the recess of the insert so as to interlock and prevent relative axial and radial displacement between the insert and the outer body, wherein the at least one recess of the insert increases in axial dimension as proceeding radially inward, such that the at least one recess has an undercut engageable with the at least one projection of the outer body.