Deep linkage
The deep linkage (also: deep draw linkage) is used on bogies of rail vehicles to counteract unequal wheel set loads.
Reasons for deep linkage
To transfer the train, brake and managerial staff from the bogie to the bridge frame, locomotives mostly use pivot pins attached to the locomotive frame with appropriate bearings. Since the counterforce inevitably occurs tangentially on the wheel tire at the level of the upper edge of the rail, there is a large lever arm when the pivot pin is high, so that a strong moment occurs, especially when starting , which relieves the front wheel sets. As a result, the tensile force can no longer be sufficiently transmitted to the rail at high loads.
Use of rotating towers
In order to reduce the load on the two leading axles of the bogies when starting, the pivot bearings are arranged as deep as possible (20–50 cm above the upper edge of the rail) in the bogie, as is the case with the Taurus . This pivot is called a rotating tower because of its size .
Use of pull / push rods
Another possibility is to transfer the tractive force from the bogie frame to the locomotive body with the help of pull / push rods, as is the case with the 101 series . The power is not transmitted via the pivot, but via a rod attached to the bogie frame as deep as possible and connected to the locomotive body.
The pull / push rod is also used in meter gauge locomotives. Due to the small installation space, the pull / push rod on the Gmf 4/4 II of the Rhaetian Railway was designed in an angled shape.
Individual evidence
- ↑ Hans-Bernhard Schönborn, Hans Furgler, Walter Frech: Gebirgslok Ge 4/4 II . GeraMond Verlag, 2002.
- ^ A b Michael Nold: The infrastructure diesel locomotives Gmf 4/4 II of the Rhaetian Railway . In: Swiss Railway Review . No. June 06 , 2018, p. 308-313 .