Rolling bearing and intermediate piece therefor

Patent metadata

Field	Value
Publication number	US-12460675-B2
Application number	US-202318325856-A
Country	US
Kind code	B2
Filing date	May 30, 2023
Priority date	Nov 30, 2020
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

Described herein is a rolling bearing having two concentric raceways between which there are provided, in a bearing gap, a plurality of rolling bodies which roll on at least two tracks, wherein intermediate pieces which keep the rolling bodies spaced apart from one another are provided between the rolling bodies, wherein the intermediate pieces each comprise a central portion which is connected via connecting struts to an outer frame part surrounding the central portion, wherein the frame part takes the form of a bar structure or skeleton structure with window-like and/or door arch-like cutouts.

First claim

We claim:

1 . A rolling bearing comprising:
two concentric rings; rolling bodies which roll on at least two tracks, wherein the rolling bodies are in a curve of the at least two tracks; and intermediate pieces which keep the rolling bodies spaced apart from one another, and wherein the intermediate pieces each comprise a central portion connected via connecting struts to an outer frame part surrounding the central portion, wherein the central portion is integrally formed with the connecting struts and the outer frame part; wherein the outer frame part comprises one or more cutouts; wherein the one or more cutouts are alternately open towards opposite axial end faces of the intermediate piece and are encompassed by frame struts in a circumferential direction of the intermediate piece; and wherein the central portion in a running direction of a rolling body row transmits force between the rolling bodies that are spaced apart and abutment surfaces that keep adjacent rolling bodies spaced apart on said central portion, wherein the force is only transmitted by the central portion, wherein the connecting struts and the outer frame part does not transmit the force.

2 . The rolling bearing of claim 1 , wherein the one or more cutouts are open towards an end face of the intermediate piece and are encompassed by a U-shaped frame part comprising a U-shaped web frame.

3 . The rolling bearing of claim 1 , wherein material portions of the outer frame part between the cutouts form less than 50% of an annular enveloping surface of the outer frame part circumferentially enclosing the outer frame part including the cutouts.

4 . The rolling bearing of claim 1 , wherein the outer frame part comprises alternating longitudinal struts and cross-struts.

5 . The rolling bearing of claim 1 , wherein the outer frame part projects outwardly beyond the central portion towards both end faces of the intermediate piece and/or has a length in the direction of running of a rolling body row which is more than twice the length of the central portion.

6 . The rolling bearing of claim 1 , wherein the connecting struts between the central portion and the outer frame part are connected to a middle portion of the outer frame part between end margins of the outer frame part and/or extend in a common plane perpendicular to a running direction of a rolling body row.

7 . The rolling bearing of claim 1 , wherein the connecting struts between the central portion and the outer frame part comprise bar-shaped spokes.

8 . The rolling bearing of claim 1 , wherein the connecting struts are thinner in a running direction of a rolling body row than the central portion.

9 . The rolling bearing of claim 1 , wherein the connecting struts between the central portion and the outer frame part are free of contact with the rolling bodies.

10 . The rolling bearing of claim 1 , wherein an annular area between the central portion and the outer frame part bridged by the connecting struts is formed less than 50% by the connecting struts and comprises more than 50% of openings.

11 . The rolling bearing of claim 1 , wherein an annular area between the central portion and the outer frame part bridged by the connecting struts is formed less than 30% by the connecting struts.

12 . The rolling bearing of claim 1 , wherein an annular area between the central portion and the outer frame part bridged by the connecting struts comprises more than 70% of openings.

13 . The rolling bearing of claim 1 , wherein an annular area between the central portion and the outer frame part bridged by the connecting struts is formed less than 30% by the connecting struts and comprises more than 70% of openings.

14 . The rolling bearing of claim 1 , wherein the rolling bearing comprises a diameter greater than 0.5 m.

15 . An intermediate piece for insertion between rolling bodies of a rolling bearing, comprising:
a central portion; an outer frame part surrounding the central portion, wherein the outer frame part comprises with one or more cutouts; connecting struts connecting the central portion to the outer frame part; wherein the one or more cutouts are alternately open towards opposite axial end faces of the intermediate piece and are encompassed by frame struts in a circumferential direction of the intermediate piece; and wherein the central portion in a running direction of a rolling body row transmits force between the rolling bodies that are spaced apart and abutment surfaces that keep adjacent rolling bodies spaced apart on said central portion, wherein the force is only transmitted by the central portion, wherein the connecting struts and the outer frame part does not transmit the force.

Assignees

• Liebherr Components Biberah Gmbh
• Liebherr Components Biberach Gmbh

Inventors

• Altmayer Thomas
• Schierholz Lennart

Classifications

• F16C19/20

  with loose spacing bodies, e.g. balls, between the bearing balls · CPC title

• F16C33/372

  rigid · CPC title

• F16C33/3706 Primary

  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