Optimized Switch Device TOZ

Switch devices of turnouts are exposed to particularly high strains and stresses. The curved switch rails in turnouts with medium and small radii are exposed to high horizontal track guiding forces, which which will lead to an increased lateral wear of the switch blade. This will result in a high maintenance expenditure and a restricted lying period of the switch blade. For the load capacity-optimised, reinforced switch device „TOZ“ the switch is reinforced in the critical front area.

Technical description:

• Meets EN13232 standard
• Significant reinforcement of the switch width in the sensitive area

For the load capacity-optimized, reinforced switch assembly, the switch rail is reinforced in the most critical front area (blue dashed lines). To the same extent, the stock rail is taken back on the machined contact area, in such a way that the head of the stock rail increases and decreases continuously. The deviation of the running edge at the stock rail from the straight (red dashed line) is very small and thus will not lead to any impairment on the running behaviour. This has been confirmed by a simulation calculation and in practice. The transition from the machined contact area to the head of the stock rail is designed as to highly reduce occurring of squeezing in this area of the stock rail during operation. In addition, a changed lowering on the switch blade will help to improve the contact geometry between the wheel and switch blade. The same principle can also be used for the straight switch blades.

Material:

• All materials used for switch and stock rails (R260, R350HT, R400HT)
• Corrosion protection: according to requirements