The main part of energy absorption through the coupler takes place in the coupler shank. Energy absorption features integrated here may be reversible (buffers) or irreversible (deformation tubes), with different characteristics. A deformation tube, for example, can absorb high energy, but needs to be replaced once it has been activated. Deformation tubes are also available in a rear-mounted version. These are not part of the coupler shank, but mounted on the rear end of the bearing bracket, behind the coupler’s mounting plate.
The drawgear articulation may also contain certain energy absorption capacities, mostly in form of rubber elements (example: rubber cushion drawgear). These are mainly designed for absorbing impacts which occur during train operation, for example when a train starts or stops. Here, the main goal are smoother driving characteristics.
Above certain speeds or loads, it is necessary to implement additional energy absorption elements on the vehicle besides couplings. In this way, we are improving the passive safety of railcars and locomotives. According to DIN EN 15227 (Crashworthiness requirements for railway vehicle bodies), it is mandatory to ensure that on mainline rail vehicles impacts up to 36 km/h are compensated. We satisfy this requirement.
Our Scharfenberg crash buffers, crash elements and crashboxes afford the maximum possible protection according to the requirement and application. These elements can also be used in conjunction with other anti-climbing protection measures.