Oil impregnated sintered bearing and production method thereof
US11248654B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 14, 2018 |
| Grant date | Feb 15, 2022 |
| Priority date | — |
| Expiry date | Nov 14, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49668
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
On an inner peripheral surface of a bearing hole into which a shaft is inserted, concave oil supply surfaces arranged dispersively like separated islands and a sliding surface continuous around the oil supply surfaces to hold an outer peripheral surface of the shaft are formed: a maximum height difference between the sliding surface and the oil supply surfaces is not less than 0.01% and not more than 0.5% of an inner diameter Di of the sliding surface; a surface aperture area ratio of pores at the sliding surface is not more than 10%; a surface aperture area ratio of pores at the oil supply surfaces is more than 10% and less than 40%; and an area of each of the oil supply surfaces is not less than 0.03 mm2 and not more than 0.2×Di2 (mm2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.