Rolling bearing and method of manufacturing same

Patent metadata

Field	Value
Publication number	US-2025035157-A1
Application number	US-202418767017-A
Country	US
Kind code	A1
Filing date	Jul 9, 2024
Priority date	Jul 26, 2023
Publication date	Jan 30, 2025
Grant date	—

Abstract

A rolling bearing includes an outer ring having an outer surface configured to be fitted into a first component, an inner ring having an inner surface configured to be fitted onto a second component, at least one rolling element arranged between the outer ring and the inner ring, and a polymer composite sheet bonded on the outer surface of the outer ring and/or the inner surface of the inner ring by a bonding agent, where the polymer composite sheet includes at least one perfluoroalkyl and/or polyfluoroalkyl component.

First claim

What is claimed is:

1 . A rolling bearing comprising:
an outer ring having an outer surface configured to be fitted into a first component, an inner ring having an inner surface configured to be fitted onto a second component, at least one rolling element arranged between the outer ring and the inner ring, and a polymer composite sheet bonded on the outer surface of the outer ring and/or the inner surface of the inner ring by a bonding agent, wherein the polymer composite sheet includes at least one perfluoroalkyl and/or polyfluoroalkyl component.

2 . The rolling bearing according to claim 1 ,
wherein the polymer composite sheet has a thickness of 2 to 200 μm.

3 . The rolling bearing according to claim 1 ,
wherein the polymer composite sheet has a thickness of 5 to 30 μm.

4 . The rolling bearing according to claim 1 ,
wherein the polymer composite sheet is made of polytetrafluoroethylene (PTFE), fluroethylenepropylene (FEP), and/or perfluoroalkoxy (FPA).

5 . The rolling bearing according to claim 1 ,
wherein the polymer composite sheet comprises a polytetrafluoroethylene (PTFE) impregnated glass and/or polyester carrier.

6 . The rolling bearing according to claim 1 ,
wherein the polymer composite sheet comprises fluroethylenepropylene (FEP), perfluoroalkoxy (FPA), polyether ether ketone (PEEK), polyphenylene sulfide (PPS), polyester (PET), polyurethane (TPU), polyethylene (PE), polypropylene (PP), polyimide (PI), and/or polyamideimide (PAI), and wherein the polymer composite sheet includes 1 to 50 wt % polytetrafluoroethylene (PTFE).

7 . The rolling bearing according to claim 1 , wherein the bonding agent is an epoxy adhesive or a cyanoacrylate glue.

8 . The rolling bearing according to claim 7 ,
wherein the bonding agent has a thickness of less than 25 μm.

9 . The rolling bearing according to claim 1 ,
wherein the polymer composite sheet includes a silicone or acrylic adhesive on one side.

10 . The rolling bearing according to claim 1 ,
wherein a backside of the polymer composite sheet is chemically and/or plasma etched.

11 . The rolling bearing according to claim 1 ,
wherein the polymer composite sheet has a dielectric strength greater than 15 kV/mm and a dielectric constant of lower than 4.

12 . The rolling bearing according to claim 1 ,
wherein the polymer composite sheet has a thickness of 5 to 30 μm, and wherein the polymer composite sheet is made of polytetrafluoroethylene (PTFE), fluroethylenepropylene (FEP), and/or perfluoroalkoxy (FPA).

13 . An assembly comprising:
a rolling bearing according to claim 1 , wherein the outer ring is fitted into the first component, and wherein the inner ring is mounted on the second component.

14 . A method of manufacturing a rolling bearing comprising:
providing an outer ring having an outer surface configured to be fitted into a first component, providing an inner ring having an inner surface configured to be fitted onto a second component, providing at least one rolling element arranged between the outer ring and the inner ring, and bonding a polymer composite sheet on the outer surface of the outer ring and/or the inner surface of the inner ring using a bonding agent, wherein the polymer composite sheet includes at least one perfluoroalkyl and/or polyfluoroalkyl component

15 . The method according to claim 14 ,
further including, before bonding the polymer composite sheet, pretreating a backside of the polymer composite sheet using chemical etching and/or plasma etching.

Assignees

• Skf Ab

Inventors

• Zhou Xiaobo
• Nijdam Thijs
• Vierling Andreas
• Henninger Frank
• Shen Bo
• Cao Lijun
• Brizmer Victor
• Chen Yafen
• An Hongyuan

Classifications

• F16C2223/32

  by attaching pre-existing layers, e.g. resin sheets or foils by adhesion to a substrate; Laminating · CPC title

• F16C33/6696

  with solids as lubricant, e.g. dry coatings, powder · CPC title

• F16C35/077

  between housing and outer race ring · CPC title

• F16C35/073

  between shaft and inner race ring · CPC title

• F16C33/586

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