Bogie with a deformable underframe including an oblique faced friction wedge and direct engagement between bolster and side-frame
US5072673A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 19, 1990 |
| Grant date | Dec 17, 1991 |
| Priority date | — |
| Expiry date | Mar 19, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61F5/122
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The bogie has two side-frames. Each side-frame has an opening in which a respective end of a bolster bar rests upon the side-frame by way of suspension springs. Two wedges, themselves supported by springs and having an oblique face which is thereby pressed against an oblique face of the bolster, consequently assume a friction bearing against a frictional face of the side-frame so as to damp the suspension oscillations. The oblique faces are not only oblique with respect to the vertical, but also with respect to the longitudinal midline of the bogie. The horizontal force to which the wedge is subjected consequently comprises a transverse component which is used to clamp the side-frame between the wedge and a reference face of the bolster. The transverse component thus stabilizes the side-frames in a position orthogonal to the bolster, thereby counteracting forward and backward movements of one side-frame with respect to the other, while allowing for independent movements of the side-frames in their respective vertical plane to absorb rail bed irregularities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.