Title:
GREASE-SEALED BEARING FOR MOTOR
Document Type and Number:
Japanese Patent JP2016133144
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a grease-sealed bearing for a motor which is excellent in high-temperature durability and quietness, and lowers rotation torque while effectively preventing exfoliation on a bearing rolling face caused by hydrogen brittleness.SOLUTION: A grease-sealed bearing 1 for a motor supports a rotating shaft 11 of a rotor 13 of the motor, a grease compound containing base oil, a thickener, and alkanol amine is sealed into a periphery of rolling bodies, the base oil is contained at 50 mass% or higher with respect to the base oil as a whole with ester oil as an essential component, the dynamic viscosity of the base oil at 40°C is 30 to 70 mm/s, the thickener is an aliphatic diurea compound, and the alkanol amine is contained at 0.1 to 10 pts.wt. with respect to 100 pts.wt. of a total amount of the base oil and the thickener.SELECTED DRAWING: Figure 2
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Inventors:
KONDO RYOTA
KAWAMURA TAKAYUKI
ITO MOTOHIRO
KAWAMURA TAKAYUKI
ITO MOTOHIRO
Application Number:
JP2015006738A
Publication Date:
July 25, 2016
Filing Date:
January 16, 2015
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD
International Classes:
F16C33/66; C10M105/32; C10M107/02; C10M115/08; C10M133/08; F16C19/06; H02K5/173
Domestic Patent References:
| JP2002221231A | 2002-08-09 | |||
| JP2005298537A | 2005-10-27 | |||
| JP2008286343A | 2008-11-27 | |||
| JP2011168648A | 2011-09-01 | |||
| JP2014228059A | 2014-12-08 |
Attorney, Agent or Firm:
Wake Manipulation
Wake Hikari
Wake Hikari