Unbalanced shaft
US8387584B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 13, 2010 |
| Grant date | Mar 5, 2013 |
| Priority date | — |
| Expiry date | Aug 10, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/2183
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An unbalanced shaft (1a, 1b, 1c), particularly for compensating mass forces and/or mass moments of inertia of an internal combustion engine (2) is provided. The shaft includes a shaft section (10, 11, 12) and a bearing journal (13a, 13b, 13c) axially adjacent to the shaft section, the bearing journal includes a fully cylindrical outer peripheral surface (18) serving as an inner raceway for the rolling elements (16) of a rolling bearing (14) and the bearing journal has a multi-piece configuration, so that both the shaft section and the bearing journal possess a mass center of gravity that, for producing the shaft unbalance, extends eccentric to the axis of rotation (19) of the unbalanced shaft. For supplying lubricant to the inner raceway and the rolling elements, an oil channel (20a, 20b, 20c) extends radially outwards through the bearing journal and opens, relative to the mass center of gravity of the bearing journal, on the other side, situated beyond the axis of rotation, on the outer peripheral surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.