A rail vehicle and its bogie

Abstract

The invention discloses a railway vehicle and a bogie thereof. The bogie comprises a frame, and wheel-set axle boxes arranged on two sides of the frame, wherein the frame and the wheel-set axle box on the corresponding side are flexibly connected through a combined flexible connecting element with variable longitudinal rigidity. According to the railway vehicle and the bogie thereof, provided by the invention, the frame and the wheel-set axle box on the corresponding side are flexibly connected through a pull rod assembly with variable longitudinal rigidity, so that the longitudinal rigidity between the frame and the wheel-set axle box can be automatically and adaptively changed, and the curved radial through capacity of an ordinary bogie is obviously improved. Therefore, the bogie has a relatively good radial function, and that the linear operating performance of the bogie is not reduced is ensured.

Description

technical field [0001] The invention relates to a rail vehicle and its bogie, belonging to the field of rail vehicles. Background technique [0002] For railway bogies, wheels and rails are prone to wear when passing through curves. The main solution is to use a radial bogie, that is, to realize the radial function by adding a guiding mechanism, but this also makes the structure of the bogie complex and the weight increased, so it is only useful on lines with more small radius curves . However, for the multi-curve lines with few small curves, the use of radial bogies may outweigh the gains. Another approach is to reduce the longitudinal stiffness of the wheelset, but this in turn leads to a reduction in the straight-line performance of the bogie. [0003] Japanese patent JP3171197 discloses a radial bogie with an actively controlled radial mechanism, but the radial mechanism is very complicated and not universal. Contents of the invention [0004] The purpose of the pr...

AI Technical Summary

Problems solved by technology

The main solution is to use a radial bogie, that is, to realize the radial function by adding a guiding mechanism, but this also makes the structure of the bogie complex and the weight increased, so it is only useful on lines with more small radius curves

However, for multi-curve lines with few small curves, the use of radial bogies may not be worth the loss.

Another approach is to reduce the longitudinal stiffness of the wheelset, but this in turn leads to a reduction in the straight-line performance of the bogie

[0003] Japanese patent JP3171197 discloses a radial bogie with an active control radial mechanism, but the radial mechanism is very complicated and not universal

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