Vectron – the drive system

Vectron is available either with a partially suspended pinion hollow shaft drive or with a fully suspended drive system. The partially suspended pinion hollow shaft drive is suitable for speeds of up to 200km/h, while the fully suspended drive system is capable of speeds as high as 230 km/h. Both drive systems are based on our experience with the Eurosprinter and the Eurorunner.

Pinion hollow shaft drive – the standard

The pinion hollow shaft drive is a partially suspended drive system in which the motor is suspended elastically in the bogie frame via traction motor support and rubber tilt arm. The transmission itself rides on the axle via two multiple-disc steel couplings, arranged on both sides of the hollow shaft, decoupled from the motor. The components are connected as close as possible to the coupling via a tilt arm in order to reduce the relative movement between transmission and motor. Another special feature is the complete separation of the lubricant circuit between transmission and traction motor. Unlike the other normal concepts, the traction motor bearing on the output side is lubricated with grease and is not connected to the transmission oil circulating system. This means that no contamination can get into the bearing via the transmission oil, which could reduce bearing life. An additional advantage is that, due to the separation at the multiple-disc steel coupling, the traction motor can be removed from underneath without the transmission, or the axle – complete with transmission – can be removed without the traction motor. The pinion hollow shaft drive is suitable for maximum speeds of up to 200 km/h.

High-performance drive with wheel disc brake – the option

In view of the restrictions inherent in the TSI High-speed, it made sense to limit the top speed for high-speed locomotives to 200 km/h. However, when deploying Vectron in situations where other standards apply, a fully suspended drive can be integrated, enabling speeds of up 230 km/h. The bogie is already designed for this, so that a fully suspended high-performance drive with wheel disc brakes can therefore be employed as an option. This and the pinion hollow shaft drive have identical interfaces to the bogie frame. Wheelset and drive are decoupled via curved-tooth couplings arranged on both sides of the hollow shaft.

Comparison of unsprung masses

The unsprung masses of the pinion hollow shaft drive are significantly smaller than those of the nose-suspended drive usually employed for freight locomotives and only slightly higher than those of a fully suspended quill drive. The pinion hollow shaft drive thus represents the optimum technical solution. And at the same time it is also the best choice in terms of cost-efficiency since maintenance and repair costs are reduced.


Reduced unsprung masses for optimized cost-efficiency