Bearing unit for railway carriages
US7419306B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2005 |
| Grant date | Sep 2, 2008 |
| Priority date | — |
| Expiry date | May 16, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2326/10
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Emergence of fretting worn powder is to be suppressed, and intrusion of the worn powder that has emerged into an internal area of the bearing. A ring spacer is interposed between an end face of an inner ring of the bearing to be mounted on a wheel axle, and an end face of a rear cover (ring member) to be mounted on the wheel axle for axial positioning of the inner race with respect to the wheel axle. An elastic seal ring is integrally fixed to an outer periphery of the ring spacer. The elastic seal ring is elastically fitted to an outer circumference of a recessed stepped portion formed on the end face of the rear cover. The elastic seal ring is thus pressed against the opposing end faces of the inner race and the rear cover. Inside the elastic seal ring, a storage space for the worn powder is provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.