Pendulum assembly for a crankshaft pendulum having cast-in near net shape hardened inserts
US9995367B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2015 |
| Grant date | Jun 12, 2018 |
| Priority date | — |
| Expiry date | Feb 10, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F5/007
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A pendulum crankshaft for an internal combustion engine includes a pendulum crankshaft having pendulum crank rolling path inserts that are cast into the component during the casting process. The rolling path inserts are positioned in a mold prior to casting. By including the rolling path inserts in the component during the molding process, the need to press the rolling path insert into the component after the component is cast is thus avoided, thereby eliminating the resulting stresses that would otherwise result. Machining and subsequent heat treatment are unnecessary. The component can be one or both of the crankshaft pendulum and the pendulum carrier. The rolling path may be formed from a metal such as sintered powdered metal. The flowable material may be a metal such as iron. The resulting component is free of stress regions, such as on the carrier strap, that normally result from methods that involve press-fitting the rolling path insert into the component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.