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Grease composition for EV/HEV driving motor bearing and EV/HEV driving motor bearing
Grease composition for EV/HEV driving motor bearing and EV/HEV driving motor bearing
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机译:EV / HEV驱动马达轴承和EV / HEV驱动马达轴承的润滑脂成分
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摘要
A grease composition for EV/HEV driving motor bearing, containing a diurea thickener of the following formula (A):; wherein R1, R2 and R3 are defined, with the ratio of the number of moles of the straight-chain or branched alkyl group having 16 to 20 carbon atoms to the total number of moles of the cyclohexyl group and the straight-chain or branched alkyl group having 16 to 20 carbon atoms, expressed as [((the number of alkyl group)/(the number of cyclohexyl group+the number of alkyl group))×100] being 60 to 80%, and a base oil which has a kinematic viscosity at 40° C. of 15 to 50 mm2/s and includes a trimethylolpropane ester oil in an amount of 80 mass % or more based on the total base oil mass. The grease composition can exhibit a long bearing lubrication life at high temperature and high speed, and satisfactory low-temperature flowability.展开▼