Hub-bearing assembly with sealing device

摘要

A hub-bearing assembly (10) is provided with an outer, stationary, ring (20), and an inner ring (30) with a flange (32) for mounting a wheel, and the flange (32) forms an annular relief (36) projecting in an axially inward direction and having an outer toroidal surface (42); a sealing device (50), mounted on the outer ring (20), has a non-contacting axial lip (61) which extends axially towards the flange (32) and has a free end portion (62) which creates a labyrinth seal with the outer toroidal surface (42) of the annular relief (36).

主权项

1. A hub-bearing assembly for rotatably mounting a wheel to a vehicle, the assembly having an axis of rotation and comprising:
a radially outer, stationary bearing ring; a radially inner bearing ring, rotatable about the axis of rotation and providing a flange extending in a radially outer direction for mounting a wheel; a plurality of rolling elements interposed between the outer and inner rings; and a sealing device, mounted to the radially outer, stationary bearing ring and having a plurality of elastomeric sealing lips extending towards the radially inner bearing ring, wherein the flange forms an annular relief projecting in an axially inner direction, the annular relief having a radially outer surface facing away from the axis of rotation, a radially inner surface facing towards the axis of rotation, and an end surface connecting the radially outer surface with the radially inner surface, the radially outer surface having a toroidal shape that terminates at the end surface, wherein the entire radially outer surfaces has the toroidal shape, and wherein at least one of the elastomeric sealing lips of the sealing device is a non-contacting axial lip that extends axially towards the flange and provides a free end portion which forms a labyrinth seal with the radially outer surface of the annular relief without contacting the annular relief.