Sintered oil-impregnated bearing
US11648611B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2018 |
| Grant date | May 16, 2023 |
| Priority date | — |
| Expiry date | Sep 6, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2204/14
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided is a novel sintered oil-impregnated bearing superior in wear resistance and cost performance under a severe use condition where the bearing collides with a shaft due to a high load and vibration, such as a condition associated with an output shaft of an electric motor installed in a vehicle and a wiper motor installed therein. The sintered oil-impregnated bearing contains: 15 to 30% by mass of Cu; 1 to 4% by mass of C; and a remainder consisting of Fe and inevitable impurities, in which a metal structure with copper being melted therein is provided at least on a bearing surface; pearlite or a pearlite with ferrite being partially scattered therein is provided in a matrix; a copper-rich phase arranged in a mesh-like manner is also provided in the matrix; and a free graphite is dispersed and distributed in the matrix as well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.