Hub-bearing assembly for a vehicle wheel

Patent metadata

Field	Value
Publication number	US-2018126780-A1
Application number	US-201715727876-A
Country	US
Kind code	A1
Filing date	Oct 9, 2017
Priority date	Oct 24, 2016
Publication date	May 10, 2018
Grant date	—

Abstract

A hub-bearing assembly having an axis of rotation and provided with an outer ring and an inner ring that define between them an interspace. The inner ring is provided with a flange that is transverse to the axis, and a sealing device being interposed between the outer ring and the inner ring and being provided with a moving sealing lip that is integral with the flange with the interposition of a second sealing shield, and which is directed towards a front annular surface of the outer ring.

First claim

1 . A hub-bearing assembly having an axis of rotation and comprising:
an outer bearing ring radially bordered by a cylindrical outer surface coaxial to the axis of rotation and axially delimited by an annular surface transverse to the axis of rotation and adjacent to the cylindrical outer surface; an inner bearing ring defining with the outer ring an interspace, and provided with a flange that is transversal to the axis of rotation; and a sealing device, which is interposed between the outer ring and the inner ring to prevent the entry in the hub-bearing assembly of any impurities through the interspace, and provides: a first sealing shield joined to the outer ring and supports a static sealing lip extending axially beyond the outer surface towards the annular flange; a second sealing shield joined with the inner ring and has an annular wall arranged against the flange and in a frontal position to the static sealing lip; wherein the sealing device provides a dynamic lip joined to the annular wall of the second sealing shield and directed towards the annular surface of the outer ring.

2 . The hub-bearing assembly according to claim 1 , wherein both the static sealing lip and the dynamic sealing lip are not contacting and are oriented in opposite axial directions relative to one another.

3 . The hub-bearing assembly according to claim 2 , wherein the outer ring of the bearing provides a groove formed through the outer cylindrical surface, the second sealing shield comprises a cylindrical portion placed around the cylindrical outer surface to define, with respect to the groove, an inlet area of the interspace.

4 . The hub-bearing assembly according to claim 3 , wherein the sealing device provides a layer of the coating material that is integral to the annular wall and to the cylindrical portion; the sealing dynamic lip being made of one piece with the layer of coating material.

Assignees

• Skf Ab

Inventors

• Bertola Maurizio
• Duch Daniele

Classifications

• B60B2380/00

  Bearings · CPC title

• F16C19/14

  for both radial and axial load · CPC title

• F16C2326/02

  Wheel hubs or castors · CPC title

• F16C33/7826

  of the opposing surface cooperating with the seal, e.g. a shoulder surface of a bearing ring · CPC title

• F16C33/7879

  with a further sealing ring · CPC title