Double row tapered roller bearing, bearing ring, and method for producing double row tapered roller bearing
US10378076B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 2016 |
| Grant date | Aug 13, 2019 |
| Priority date | — |
| Expiry date | Oct 12, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49684
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A double row tapered roller bearing includes: an outer ring having an annular shape; an inner ring disposed on an inner circumferential side of the outer ring and having an annular shape; and rollers. The inner ring has an outer circumferential surface facing the outer ring and having two rows of grooves having a bottom surface serving as a raceway surface. The rollers are tapered rollers disposed in the grooves in contact with the raceway surface of the inner ring and are also in contact with the outer ring. At outer circumferential surface of the inner ring, a region adjacent to the groove includes a hardened region extending from the inner peripheral surface of the groove to the region adjacent to the groove, and an unhardened region located at a position farther from the groove than the hardened region and being smaller in hardness than the hardened region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.