Ball bearing having segmented and integral races

• US 8,834,033 B2
• Filed: 10/25/2012
• Issued: 09/16/2014
• Est. Priority Date: 10/25/2012
• Status: Active Grant

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Inventors: Thomas, Steven G., Berhan, Michael Tekletsion
• Primary Examiner(s): Waits, Alan B
• Application Number:
  US13/660,310
• Publication Number:
  US 20140119685A1
• Time in Patent Office: 691 Days
• Field of Search: 384/506, 384/513, 384/516, 384/523, 384/524, 384/526, 384/528, 384/530, 384/560, 384/586
• US Class Current: 384/528
• CPC Class Codes: F16C 19/06 with a single row or balls
• CPC Class Codes: F16C 19/166 Four-point-contact ball bearings
• CPC Class Codes: F16C 2300/02 General use or purpose, i.e. no use, purpose, special adaptation or modification indicated or a wide variety of uses mentioned
• CPC Class Codes: F16C 33/3806 Details of interaction of cage and race, e.g. retention, centring
• CPC Class Codes: F16C 33/60 divided or split, e.g. comprising two juxtaposed rings
• CPC Class Codes: F16C 41/04 Preventing damage to bearings during storage or transport thereof or when otherwise out of use

Abstract

A bearing includes a first race including first and second segments, forming aligned pairs of first surfaces, spaced angularly about an axis; a second race including second surfaces, each second surface aligned with one of the pairs of first surfaces; balls, each ball contacting the surfaces of the first and second races; and a cage retaining each ball and engaging the first and second segments.

Claims

1. A bearing, comprising:

a first race including a first segment including a first surface and a second segment including a first surface that aligns with the first segment first surface in an aligned pair of first surfaces, the pair of first surfaces spaced axially relative to an axis;

a second race including second surfaces, each second surface aligned with a respective one of the first surfaces;

balls, each ball located in an annular space between the first and second races;

a cage maintaining each ball in spaced relation and including first tabs circumferentially spaced apart along a circumferential length of the bearing, with each first tab extending axially from a location between respective adjacent balls and in a first lateral direction, each first tab including a first leg directed along a surface of the first segment to retain the first segment, and the cage including second tabs extending in a second lateral direction and configured to retain the second segment to create a gap between the segments.

2. The bearing of claim 1, wherein the pair of first surfaces comprises a concave surface with a constant radius of curvature contacted by the balls.

3. The bearing of claim 1, wherein:

the first surface of the first segment is a concave surface with a first constant radius of curvature, and contacted by the balls;

the first surface of the second segment is a concave surface with a second constant radius of curvature, and contacted by the balls, the second constant radius of curvature greater than the first constant radius of curvature.

4. The bearing of claim 1, wherein:

the first surface of the first segment is a concave surface with a first constant radius of curvature, and contacted by the balls;

the first surface of the second segment is a concave surface with a second constant radius of curvature, not contacted by at least one of the balls when subjected to a predetermined asymmetrical loading, the second constant radius of curvature greater than the first constant radius of curvature.

5. The bearing of claim 1, wherein each of the second surfaces is a concave surface with a constant radius of curvature and contacted by the balls.

6. The bearing of claim 1, wherein one of the second surfaces comprises

a third concave surface having a center of curvature at a first point;

and

another of the second surfaces comprises a fourth concave surface having a center of curvature at a second point that is not coincident with the first point.

7. The bearing of claim 1, wherein one of the second surfaces comprises

a third concave surface having a center of curvature at a first point;

and

another of the second surfaces comprises a fourth concave surface having a center of curvature at a second point that is not coincident with the first point, the third surface being contacted by the balls over a first range of contact, the fourth surface being contacted by the balls over a second range of contact that is spaced from the first range of contact.

8. The bearing of claim 1, wherein each of the balls is a sphere.

9. The bearing of claim 1, wherein the cage further comprises:

each of the first legs are directed along an outer surface of the first segment to retain the outer surface of the first segment;

the second tabs circumferentially spaced apart along the circumferential length of the bearing, with each second tab extending axially from a location between respective adjacent balls in a second lateral direction, each second tab including a second leg directed along an outer surface of the second segment to retain the outer surface of the second segment.

10. The bearing of claim 1, wherein:

the first race includes first and second laterally spaced ribs, each rib extending radially from and circumferentially along the first race; and

the cage further comprises;

each of the first legs directed along an outer surface of the first rib to retain the first rib;

the second tabs circumferentially spaced apart along the circumferential length of the bearing, with each second tab extending axially from a location between respective adjacent balls in a second lateral direction, each second tab including a second leg directed along an outer surface of the second rib to retain the second rib.

11. The bearing of claim 1, wherein:

the first race includes first and second laterally spaced shoulders, each shoulder extending radially from and circumferentially along the first race; and

the cage further comprises;

each of the first legs directed along an outer surface of the first shoulder to retain the first shoulder;

the second tabs circumferentially spaced apart along the circumferential length of the bearing, with each second tab extending axially from a location between respective adjacent balls in a second lateral direction, each second tab including a second leg directed along an outer surface of the second shoulder to retain the second shoulder.

12. A bearing, comprising:

a first race including a first segment including a first surface and a second segment including a first surface that aligns with the first segment first surface in an aligned pair of first surfaces, the pair of first surfaces spaced axially relative to an axis, the pair of first surfaces comprising a pair of concave surfaces, each with a constant radius of curvature;

a second race including concave second surfaces with a constant radius of curvature, each second surface aligned with a respective one of the first surfaces;

balls, each ball located between the first and second races;

a cage maintaining each ball in spaced relation and including first tabs circumferentially spaced apart along a circumferential length of the bearing, with each first tab extending axially from a location between respective adjacent balls and in a first lateral direction, each first tab including a first leg directed along a surface of the first segment to retain the first segment, and the cage including second tabs extending in a second lateral direction and configured to retain the second segment to create a gap between the segments.

13. The bearing of claim 12, wherein the cage further comprises:

each of the first legs are directed along an outer surface of the first segment to retain the outer surface of the first segment;

the second tabs circumferentially spaced apart along the circumferential length of the bearing, with each second tab extending axially from a location between respective adjacent balls in a second lateral direction, each second tab including a second leg directed along an outer surface of the second segment to retain the outer surface of the second segment.

14. The bearing of claim 13, wherein:

the first surface of the first segment is contacted by the balls;

the first surface of the second segment is not contacted by at least one of the balls when subjected to a predetermined asymmetrical loading, the constant radius of curvature of the first surface of the second segment is greater than the constant radius of curvature of the first surface of the first segment.

15. The bearing of claim 12, wherein:

the first race includes first and second laterally spaced shoulder, each shoulder extending radially from and circumferentially along the first race; and

the cage further comprises;

each of the first legs directed along an outer surface of the first shoulder to retain the first shoulder;

the second tabs circumferentially spaced apart along the circumferential length of the bearing, with each second tab extending axially from a location between respective adjacent balls in a second lateral direction, each second tab including a second leg directed along an outer surface of the second shoulder to retain the second shoulder.

16. A bearing, comprising:

a first race including a first segment having a circumferentially extending first surface and a second segment having a circumferentially extending second surface;

a second race including a third concave surface having a center of curvature at a first point; and

a fourth concave surface, adjacent to the third surface and having a center of curvature at a second point that is not coincident with the first point;

balls, each ball located in an annular space between the first and second races;

a cage maintaining each ball in spaced relation and including first tabs circumferentially spaced apart along a circumferential length of the bearing, with each first tab extending axially from a location between respective adjacent balls and in a first lateral direction, each first tab including a first leg directed along a surface of the first segment to retain the first segment, and the cage including second tabs extending in a second lateral direction and configured to retain the second segment to create a gap between the segments.

17. The bearing of claim 16, wherein the third surface is contacted by one of the balls over a first range of contact, and the fourth surface is contacted by said one of the balls over a second range of contact that is spaced from the first range of contact.

18. The bearing of claim 16, wherein the cage further comprises:

each of the first legs are directed along an outer surface of the first segment to retain the outer surface of the first segment;

the second tabs circumferentially spaced apart along the circumferential length of the bearing, with each second tab extending axially from a location between respective adjacent balls in a second lateral direction, each second tab including a second leg directed along an outer surface of the second segment to retain the outer surface of the second segment.

19. The bearing of claim 16, wherein:

the first race includes first and second laterally spaced shoulder, each shoulder extending radially from and circumferentially along the first race; and

the cage further comprises;

each of the first legs directed along an outer surface of the first shoulder to retain the first shoulder;

the second tabs circumferentially spaced apart along the circumferential length of the bearing, with each second tab extending axially from a location between respective adjacent balls in a second lateral direction, each second tab including a second leg directed along an outer surface of the second shoulder to retain the second shoulder.