Harmonic drive camshaft phaser with improved radial stability
US8424500B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 2010 |
| Grant date | Apr 23, 2013 |
| Priority date | — |
| Expiry date | Jul 7, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2001/3521
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Improved stiffening and minimized distortion of a housing for an eVCP achieved by forming a plurality of radial housing stiffeners into the housing around the motor mount end and into the eVCP's hub. A back plate is press fit into the rear of the housing, and a straight axial knurl is applied to the surface of the back plate or housing, which knurl permits a larger tolerance-higher press fit class to be used without resulting in significant deformation of the housing. The knurled back plate is harder than the housing, causing the high points of the knurl to plastically deform or plow the housing material during assembly, resulting in less radial deformation of the bore and the journal bearing. An interface between the housing and the hub provides a journal bearing interface to improve axial stability between the hub and housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.