Flanged hub-bearing unit

Patent metadata

Field	Value
Publication number	US-2016009131-A1
Application number	US-201514796263-A
Country	US
Kind code	A1
Filing date	Jul 10, 2015
Priority date	Jul 11, 2014
Publication date	Jan 14, 2016
Grant date	—

Abstract

A hub-bearing unit includes a bearing unit having a stationary radially outer ring, a rotatable radially inner ring, and a double row of rolling bodies. The first row of rolling bodies, are axially outwards, interposed between the radially outer ring and a rotor-hub. The rolling bodies centers are located along a radius of a first circle, respective to a hub-bearing unit symmetry axis. The second row of rolling bodies, axially inwards, being interposed between the radially outer ring and the radially inner ring. The radially inner ring is assembled on top of the rotatable rotor-hub. A flange portion is axially external and steadily fixed to a tubular portion of the rotor-hub. The flange includes a plurality of fixing holes, whose axes are located along a radius of a second circle, respective to the hub-bearing unit symmetry axis. The first circle radius is greater than the second circle radius.

First claim

1 . A hub-bearing unit comprising:
a bearing unit comprising:
a stationary radially outer ring,
a rotatable radially inner ring, and
a double row of rolling bodies, the first row of rolling bodies are axially outwards, being interposed between the radially outer ring and a rotatable rotor-hub and whose centers of the rolling bodies are located along a first circle having a first circle radius, the first circle radius being respective to a symmetry axis of the hub-bearing unit, and the second row of rolling bodies are axially inwards, being interposed between the radially outer ring and the radially inner ring,
wherein the radially inner ring is assembled to a top of the rotatable rotor-hub, the rotor-hub comprising:
a tubular portion,
a flange portion axially external and steadily fixed to the tubular portion, the flange portion provided with a plurality of fixing holes, wherein axes of each fixing hole of the plurality of fixing holes are located along a second circle having a radius, with respect to the symmetry axis of the hub-bearing unit,
wherein the radius of the first circle of the rolling elements centers is greater than the radius of the second circle of the fixing holes axes.

2 . The hub-bearing unit according to claim 1 , wherein the radius of the first circle of the centers of the rolling bodies of the axially outer row is equal to the radius of a circle of the centers of the rolling bodies of the axially inner row.

3 . The hub-bearing unit according to claim 1 , wherein the tubular portion of the rotor-hub defines a rolling race for the rolling bodies of the axially outer row.

4 . The hub-bearing unit according to claim 1 , wherein the rotor-hub is angularly coupled to a constant velocity joint, from which the rotor-hub gets the driving torque.

5 . The hub-bearing unit according to claim 1 , wherein the radially inner ring defines a rolling race for the rolling bodies of the axially inner row.

6 . The hub-bearing unit according to claim 1 , further comprising a bushing, for centering the vehicle wheel, wherein the bushing is coupled to the flange portion of the rotor-hub.

7 . The hub-bearing unit according to claim 1 , further comprising a tubular portion of the radially outer ring, wherein the tubular portion comprises a cylindrical surface, which is radially external and configured to be coupled to a cylindrical seat of a knuckle of a vehicle suspension.

Assignees

• Bosco Domenico
• Skf Ab

Inventors

• Bosco Domenico

Classifications

• B60B27/0005 Primary

  with ball bearings · CPC title

• B60B27/0094

  one or more of the bearing races are formed by the hub · CPC title

• B60B27/065 Primary

  characterised by the fixation of the hub to the axle · CPC title

• F16C2326/02

  Wheel hubs or castors · CPC title

• F16C33/586

  outside the space between the races, e.g. end faces or bore of inner ring · CPC title