Rolling bearing

Patent metadata

Field	Value
Publication number	US-11035410-B2
Application number	US-202016813027-A
Country	US
Kind code	B2
Filing date	Mar 9, 2020
Priority date	Sep 8, 2017
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

The invention relates to a rolling bearing, in particular in the form of an open-center large rolling bearing, comprising a large number of rolling elements, which are held between at least two raceways, on which the rolling elements roll, wherein spacers are provided between the rolling elements, which spacers keep the rolling elements spaced apart from each other. According to the invention, at least one of the raceways has, in a center portion, an approximately groove-shaped longitudinal recess, in which support arms provided between the spacers run, which support arms reach around the rolling element between two adjacent spacers and support the adjacent spacers against each other in the running direction of the rolling elements.

First claim

We claim:

1. A rolling bearing having rolling elements that are received between at least two raceways on which the rolling elements roll off,
wherein spacers that space the rolling elements apart from one another are provided between the rolling elements,
wherein at least one of the at least two raceways has an approximately groove-like longitudinal cutout in a center section in which support arms run,
wherein the support arms are between the spacers,
wherein each of the support arms engage around at least one of the rolling elements between two adjacent spacers,
wherein the support arms support adjacent spacers against one another in a direction of running of the rolling elements, and
wherein the support arms have a thickness transversely to the direction of running of the rolling elements that is greater than a clearance of a joint between the at least two raceways at margins of the at least two raceways.

2. The rolling bearing of claim 1 , wherein each of the at least two raceways has one of the groove-like longitudinal cutouts, wherein each of the groove-like longitudinal cutouts is approximately centrally located on one of the at least two raceways; and wherein the support arms are on oppositely disposed sides of the spacers.

3. The rolling bearing of claim 1 , wherein the support arms each have a length that at least corresponds to a desired spacing of axes of rotation of the rolling elements.

4. The rolling bearing of claim 1 , wherein the support arms form guide rails that extend in parallel with the direction of running of the rolling elements and that project at the spacers at a peripheral side.

5. The rolling bearing of claim 1 , wherein the support arms are arranged centered or symmetrical with respect to a center plane of the spacers that extends perpendicular to the direction of running of the rolling elements through a center of the spacers and project approximately equally far over oppositely disposed end faces of a respective spacer body.

6. The rolling bearing of claim 1 , wherein the support arms are arranged eccentrically offset with respect to a center plane of the spacers that extends perpendicular to the direction of running of the rolling elements through a center of the spacers such that a support arm end terminates approximately flush with an end face of a respective spacer body and an oppositely disposed support arm end projects over an oppositely disposed end face of the spacer body.

7. The rolling bearing of claim 1 , wherein the spacers are configured as split and comprise spacer parts or two spacer halves between two adjacent rolling elements, and wherein a splitting plane is arranged between the spacer parts or the two spacer halves approximately in parallel with the joint.

8. The rolling bearing of claim 7 , wherein the spacer parts of at least one of spacers are fixed to one another with shape matching.

9. The rolling bearing of claim 1 , wherein the spacers are configured as split and comprise spacer parts or two spacer halves between two adjacent rolling elements, and wherein a splitting plane is arranged between the spacer parts or the two spacer halves approximately perpendicular to the direction of running of the rolling elements.

10. The rolling bearing of claim 1 , wherein the support arms are molded integrally in one piece with the spacers or are rigidly connected to the spacers.

11. The rolling bearing of claim 1 , wherein the rolling elements are spherical, wherein the at least two raceways comprise half-shells, and wherein the at least two raceways nestle up to the spherical rolling elements.

12. The rolling bearing of claim 1 , wherein the rolling bearing is configured as a four point contact bearing and has four raceway sections or a quarter shell shape in which the rolling elements run; and wherein the approximately groove-like longitudinal cutout and the spacers received therein are provided in a raceway body between two raceway sections formed thereat.

13. A rolling bearing having rolling elements that are received between at least two raceways on which the rolling elements roll off, wherein spacers that space the rolling elements apart from one another are provided between the rolling elements, wherein at least one of the at least two raceways has an approximately groove-like longitudinal cutout in a center section in which support arms run, wherein the support arms are between the spacers, wherein each of the support arms engage around at least one of the rolling elements between two adjacent spacers, wherein the support arms support adjacent spacers against one another in a direction of running of the rolling elements, and wherein the spacers comprise a half cage-like spacer structure that has spacer sections that are arranged between a plurality of adjacent rolling element pairs of the rolling elements and that are connected to one another by support arm sections, with the support arm sections running in the approximately groove-like longitudinal cutout of at least one of the at least two raceways and each engaging around a respective rolling element.

14. The rolling bearing of claim 13 , wherein the cage-like spacer structure is approximately plate-like and is aligned approximately in parallel with a main force removal direction of the rolling elements.

15. The rolling bearing of claim 13 , wherein spacer pieces are provided between the rolling elements that extend between two respective adjacent rolling elements.

16. The rolling bearing of claim 13 , wherein the spacer pieces are supported at and/or fastened to the cage-like spacer structure.

17. The rolling bearing of claim 15 , wherein the spacer pieces are each formed as split and comprise a plurality of parts between two respective adjacent rolling elements that are separated by a separation plane approximately perpendicular to the direction of running of the rolling elements.

18. The rolling bearing of claim 13 , wherein the support arms have a thickness transversely to the direction of running of the rolling elements that is greater than a clearance of a joint between the at least two raceways at margins of the at least two raceways.

19. A rolling bearing having rolling elements that are received between at least two raceways on which the rolling elements roll off,
wherein spacers that space the rolling elements apart from one another are provided between the rolling elements,
wherein at least one of the at least two raceways has an approximately groove-like longitudinal cutout in a center section in which support arms run,
wherein the support arms are between the spacers,
wherein each of the support arms engage around at least one of the rolling elements between two adjacent spacers,
wherein the support arms support adjacent spacers against one another in a direction of running of the rolling elements, and
wherein the support arms are arranged eccentrically offset with respect to a center plane of the spacers that extends perpendicular to the direction of running of the rolling elements through a center of the spacers such that a support arm end terminates approximately flush with an end face of a respective spacer body and an oppositely disposed support arm end projects over an oppositely disposed end face of the spacer body.

20. A rolling bearing having rolling elements that are received between at least two raceways on which the rolling elements roll off,
wherein spacers that space the rolling elements apart from one another are provided between the rolling elements,
wherein at least one of the at leas

Assignees

• Liebherr Components Biberach Gmbh

Inventors

• Kreiner Stephan
• Dahl Christensen Martin

Classifications

• F16C19/16

  with a single row of balls · CPC title

• F16C19/06 Primary

  with a single row or balls · CPC title

• F16C33/3706

  with concave surfaces conforming to the shape of the rolling elements, e.g. the spacing bodies are in sliding contact with the rolling elements · CPC title

• F16C19/166

  Four-point-contact ball bearings · CPC title

• F16C33/58 Primary

  Raceways; Race rings · CPC title