Tapered roller bearing, tapered roller bearing apparatus, and automotive pinion shaft supporting apparatus utilizing same tapered roller bearing apparatus
US7871201B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2006 |
| Grant date | Jan 18, 2011 |
| Priority date | — |
| Expiry date | Nov 18, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19693
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a tapered roller bearing, LWR/DW is in the range of 1.1 to 1.7 where LWR represents a roller effective length of tapered rollers and DW represents a roller mean diameter of tapered rollers. RCO/LRO is 30 to 150, and RCI/LRI is 50 to 260 where RCO represents a crowning radius of an outer ring, LRO represents a raceway length of the outer ring, RCI represents a crowning radius of an inner ring and LRI represents a raceway length of the inner ring. The following expressions are satisfied: 20°≦α≦30°, and α−0.87γ−0.334≦BK≦α−0.87γ−0.167, where α represents a raceway angle of the outer ring, γ represents a roller angle of the tapered rollers, and BK represents a rib angle of a large rib portion of the inner ring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.