US 2012/0269472 A1Published application

Rolling bearing

AssigneesNippon Grease Co., Ltd., Jtekt Corporation

InventorsKoji YOSHIZAKI, Kunihiro Yamaguchi, Komatsugu Nishimura, Michiru Ueda, Hiroki Iwamatsu, Masashi Mitsuoka

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Abstract

There is provided a rolling bearing which inhibits spalling of a rolling element and has a long service life even under rigorous environments. The rolling bearing comprises grease for lubricating rolling contact parts and/or sliding contact parts between a first raceway surface and a rolling elements and/or between a second raceway surface and a rolling elements, wherein the grease comprises a base oil, a thickener and an extreme pressure additive, the thickener is a diurea compound obtained by allowing an amine mixture comprising alkylphenylamine, alkyl group of which has 8 to 16 carbon atoms, and cyclohexylamine, to react with a diisocyanate compound, an amount of cyclohexylamine in the total amount of the alkylphenylamine and cyclohexylamine is from 91 to 99% by mole, and a reaction temperature of the extreme pressure additive with iron is 260° C. or lower.

Claims12

Dependent claims

A rolling bearing comprising:

a first race member having a first raceway surface,
a second race member having a second raceway surface,
a plurality of rolling elements rotatably arranged between said first raceway surface and said second raceway surface, and
grease for lubricating rolling contact parts and/or sliding contact parts between said first raceway surface and said rolling elements and/or between said second raceway surface and said rolling elements,
wherein said grease comprises a base oil, a thickener and an extreme pressure additive,
said thickener is a diurea compound obtained by allowing an amine mixture comprising alkylphenylamine, an alkyl group of which has 8 to 16 carbon atoms, and cyclohexylamine, to react with a diisocyanate compound,
an amount of said cyclohexylamine in the total amount of alkylphenylamine, an alkyl group of which has 8 to 16 carbon atoms, and cyclohexyl amine, is from 91 to 99% by mole, and
a reaction temperature of said extreme pressure additive with iron is 260° C. or lower.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/445,153Filed 12 Apr 2012
Priority: JP 2011-09542021 Apr 2011
Published: 25 Oct 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

C10M 169/06
Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials,…:…
F16C 33/6633
With grease as lubricant: grease properties or compositions, e.g. rheological properties
C10M 2207/0406
Ethers; Acetals; Ortho-esters; Ortho-carbonates: used as base material
C10M 2215/1026
Ureas; Semicarbazides; Allophanates: used as thickening material

Family

US 8,951,945 B2Related patent
US 2012/0269472 A1This patent

From the US filing history. Foreign family members aren’t listed.

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