Bearing

Patent metadata

Field	Value
Publication number	US-10247234-B2
Application number	US-201715704503-A
Country	US
Kind code	B2
Filing date	Sep 14, 2017
Priority date	Apr 9, 2015
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

A spherical roller bearing having a specific pitch circle diameter (PCD) that includes an outer ring, an inner ring, a plurality of roller elements arranged in first and second roller rows, each roller element providing an axially inner end, and a cage for guiding the roller elements in the first and second roller row, the cage having a plurality of cage pockets. One of the roller elements disposed within each cage pocket. Each respective cage pocket has a bottom that faces the axially inner end of the roller element in each cage pocket. A radially inner end of the cage pocket bottom contacts the axially inner end of the roller element only at a location radially equal to the specific PCD, the cage pocket bottom angled such that the cage pocket bottom abuts the axially inner end of the roller element at an angle such the contact is not flush.

First claim

The invention claimed is:

1. A spherical roller bearing having a specific pitch circle diameter (PCD), the spherical roller bearing comprising:
an outer ring providing at least one inner raceway,
an inner ring providing a first and a second outer raceway,
a plurality of roller elements arranged in a first and second roller row disposed between the at least one inner raceway and the respective first and second outer raceway, each roller element comprising an axially inner end, and
a cage for one of guiding and retaining the roller elements in the first and second roller row, the cage having a plurality of cage pockets, wherein one of the roller elements is disposed within each cage pocket, and wherein
each respective cage pocket further provides a cage pocket bottom that faces the axially inner end of the roller element in the respective cage pocket, wherein the cage pocket bottom is configured to be located entirely inwardly from the specific pitch circle diameter (PCD) such that a radially inner end of the cage pocket bottom contacts the axially inner end of the roller element only at a location radially inwardly from the specific pitch circle diameter (PCD), the cage pocket bottom being angled such that the cage pocket bottom abuts the axially inner end of the roller element at an angle such that there is not flush contact therebetween,
the cage is held in position by the axially inner ends, wherein the cage pocket bottom has the radially inner end and a radially outer end, the radially outer end contacting the axially inner end of the roller element and the radially inner end being spaced from the axially inner end of the roller element such that the cage pocket bottom is angled relative to the axially inner end of the roller element.

2. The spherical roller bearing according to claim 1 , wherein two axially opposite cage pockets bottoms for the first and second respective roller rows are inclined and are angled relative to the contact angles of the respective first and second roller rows.

3. The spherical roller bearing according to claim 1 , wherein no spacer ring is axially disposed between the first and second roller rows.

4. The spherical roller bearing according to claim 1 , wherein at least one of the plurality of cage pockets is radially outwardly enclosing the roller element contained therein such that the roller element will be restricted to move radially outwardly out from the at least one cage pocket.

5. The spherical roller bearing according to claim 1 , wherein the inner ring further comprises a first and second axially outer region on opposite axial sides of the bearing, and wherein the respective first and second axially outer region includes a first and second respective side flange.

6. The spherical roller bearing according to claim 1 , wherein the cage is a comb-shaped cage.

7. The spherical roller bearing according to claim 1 , wherein no mid-flange is axially disposed between the first and second roller rows.

8. The spherical roller bearing according to claim 1 , wherein the cage further comprises axially extending cage pocket members each configured to circumferentially space an associated two sequential rollers of the plurality of rollers, the axially extending cage pocket members having a curved profile facing one of the associated two sequential rollers.

9. The spherical roller bearing according to claim 1 , wherein, when viewed in cross section, each of the plurality of roller has a rolling surface with a first arcuate profile and an associated raceway on the inner ring has a second arcuate profile, the first and second arcuate profiles not being equal.

10. The spherical roller bearing according to claim 9 , wherein the first arcuate profile has a greater curvature than the second arcuate profile.

11. A spherical roller bearing having a specific pitch circle diameter (PCD), the spherical roller bearing comprising:
an outer ring providing at least one inner raceway,
an inner ring providing a first and a second outer raceway,
a plurality of roller elements arranged in a first and second roller row disposed between the at least one inner raceway and the respective first and second outer raceway, each roller element comprising an axially inner end, and
a cage for one of guiding and retaining the roller elements in the first and second roller row, the cage having a plurality of cage pockets, wherein one of the roller elements is disposed within each cage pocket, and wherein
each respective cage pocket further provides a cage pocket bottom that faces the axially inner end of the roller element in the respective cage pocket, wherein the cage pocket bottom is configured to be located entirely inwardly from the specific pitch circle diameter (PCD) such that a radially inner end of the cage pocket bottom contacts the axially inner end of the roller element only at a location radially inwardly from the specific pitch circle diameter (PCD), the cage pocket bottom being angled such that the cage pocket bottom abuts the axially inner end of the roller element at an angle such that there is not flush contact therebetween,
the cage is held in position by the axially inner ends, wherein the cage pocket bottom has the radially inner end and a radially outer end, the radially inner end contacting the axially inner end of the roller element and the radially outer end being spaced from the axially inner end of the roller element such that the cage pocket bottom is angled relative to the axially inner end of the roller element.

12. The spherical roller bearing according to claim 11 , wherein two axially opposite cage pockets bottoms for the first and second respective roller rows are inclined and are angled relative to the contact angles of the respective first and second roller rows.

13. The spherical roller bearing according to claim 11 , wherein at least one of the plurality of cage pockets is radially outwardly enclosing the roller element contained therein such that the roller element will be restricted to move radially outwardly out from the at least one cage pocket.

14. The spherical roller bearing according to claim 12 , wherein the inner ring further comprises a first and second axially outer region on opposite axial sides of the bearing, and wherein the respective first and second axially outer region includes a first and second respective side flange.

15. The spherical roller bearing according to claim 12 , wherein the cage is a comb-shaped cage.

16. The spherical roller bearing according to claim 12 , wherein the cage further comprises axially extending cage pocket members each configured to circumferentially space an associated two sequential rollers of the plurality of rollers, the axially extending cage pocket members having a curved profile facing one of the associated two sequential rollers.

17. The spherical roller bearing according to claim 11 , wherein, when viewed in cross section, each of the plurality of roller has a rolling surface with a first arcuate profile and an associated raceway on the inner ring has a second arcuate profile, the first and second arcuate profiles not being equal.

18. The spherical roller bearing according to claim 17 , wherein the first arcuate profile has a greater curvature than the second arcuate profile.

Assignees

• Skf Ab

Inventors

• Loof Marcus
• James Peter
• Stigsjöö Lars

Classifications

• F16C33/48

  for multiple rows of rollers or needles · CPC title

• F16C19/38 Primary

  with two or more rows of rollers · CPC title

• F16C33/583

  Details of specific parts of races · CPC title

• F16C33/4682

  of the end walls, e.g. interaction with the end faces of the rollers · CPC title

• F16C19/305

  consisting of rollers held in a cage · CPC title