Rolling bearing, machine element, and solid-film formation method

Patent metadata

Field	Value
Publication number	US-10151349-B2
Application number	US-201715618734-A
Country	US
Kind code	B2
Filing date	Jun 9, 2017
Priority date	Jun 10, 2016
Publication date	Dec 11, 2018
Grant date	Dec 11, 2018

Abstract

A method is provided that forms a solid film on a bearing component of a rolling bearing. A solution containing a fluorine compound and a lubricant having no functional group is allowed to adhere to the bearing component as a liquid film, the fluorine compound containing 3-(trimethoxysilyl) propyl methacrylate, hexafluoropropene, and methyl methacrylate as components. The solid film is formed on the at least one of the bearing components by hardening the adhering liquid film.

First claim

What is claimed is:

1. A rolling bearing comprising, as bearing components, an inner ring, an outer ring, and a plurality of rolling elements interposed between the inner ring and the outer ring, wherein
at least one of the bearing components is provided with a solid film of a fluorine compound containing 3-(trimethoxysilyl) propyl methacrylate, hexafluoropropene, and methyl methacrylate as components, and
the solid film contains a lubricant dispersively added to the solid film and having no functional group.

2. The rolling bearing according to claim 1 , wherein the lubricant is a fluorine polymer.

3. The rolling bearing according to claim 2 , wherein the fluorine compound is higher in mixture rate than the fluorine polymer.

4. A solid-film formation method for forming a solid film on at least one of bearing components of a rolling bearing including, as the bearing components, an inner ring, an outer ring, and a plurality of rolling elements interposed between the inner ring and the outer ring, the solid-film formation method comprising:
allowing a solution containing a fluorine compound and a lubricant having no functional group to adhere to the at least one of the bearing components as a liquid film, the fluorine compound containing 3-(trimethoxysilyl) propyl methacrylate, hexafluoropropene, and methyl methacrylate as components; and
forming the solid film on the at least one of the bearing components by hardening the adhering liquid film.

5. The solid-film formation method according to claim 4 , wherein the solution is prepared by adding the fluorine compound and the lubricant to a solvent,
the lubricant is perfluoropolyether, and
the solvent is an ether containing at least one of ethyl nonafluoroisobutyl ether and ethyl nonafluorobutylether.

6. A machine element comprising a component member that is rolling contact with another component member, wherein
the component member is provided with a solid film of a fluorine compound containing 3-(trimethoxysilyl) propyl methacrylate, hexafluoropropene, and methyl methacrylate as components, and
the solid film contains a lubricant dispersively added to the solid film and having no functional group.

7. A solid-film formation method for forming a solid film on a component member of a machine element that is in rolling contact with another component member, the method comprising:
allowing a solution containing a fluorine compound and a lubricant having no functional group to adhere to the component member as a liquid film, the fluorine compound containing 3-(trimethoxysilyl) propyl methacrylate, hexafluoropropene, and methyl methacrylate as components; and
forming the solid film on the component member by hardening the adhering liquid film.

8. The solid-film formation method according to claim 4 , wherein:
a concentration of the fluorine compound in the solution is in the range of 0.5 to 5 wt %, and
a concentration of the lubricant in the solution is in the range of 0.1 to 2 wt %.

9. The solid-film formation method according to claim 7 , wherein:
a concentration of the fluorine compound in the solution is in the range of 0.5 to 5 wt %, and
a concentration of the lubricant in the solution is in the range of 0.1 to 2 wt %.

Assignees

• Jtekt Corp

Inventors

• Yamakawa Kazuyoshi

Classifications

• B05D5/083

  involving the use of fluoropolymers · CPC title

• C09D133/14

  of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen · CPC title

• B05D2506/10

  Fluorinated polymers · CPC title

• B05D1/18

  performed by dipping · CPC title

• F16C33/445

  Coatings · CPC title