Hydrodynamic type bearing and hydrodynamic type bearing unit
US6250807A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1999 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Sep 8, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2370/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A thrust bearing section (14) is constituted by one bearing end face (11f1) of a hydrodynamic type oil-impregnated sintered bearing (11) and a flange portion (13a) provided on a rotating shaft (13). The squareness between the bearing end face (11f1) and the bearing inner periphery (11h) is set within 3 .mu.m, and the squareness between the flange portion (13a) and the outer periphery of the rotating shaft (13) is set within 2 .mu.m. The bearing bore diameter d and the bearing length L of the hydrodynamic type oil-impregnated sintered bearing are set as L.ltoreq.1.2 d, and a radial bearing surface (11b) is arranged at one place on the bearing inner periphery (11h).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.