A straddle-mounted chassis device

Abstract

The invention relates to a cross-mounting bottom frame device. The cross-mounting bottom frame device comprises a transversely arranged middle beam assembly, four end sleeper beam assemblies connected with the front and back sides of the two ends of the middle beam assembly respectively, two middle sleeper beam assemblies connected with the front and back sides of the middle of the middle beam assembly respectively, a bottom frame center disc assembly arranged on the upper surface of the middle beam assembly between the two middle sleeper beam assemblies, two steering frame center disc assemblies arranged at the lower surfaces of the two ends of the middle sleeper beam assembly between the two end sleeper beam assemblies respectively, two lower side bearings arranged on the upper surfaces of the free ends of the two middle sleeper beam assembly respectively, and four upper side bearings installed on the lower surfaces of the free ends of the four end sleeper beam assemblies respectively, wherein the middle beam assembly is of a fish-belly-shaped box type structure, the end sleeper beam assemblies and the middle sleeper beam assemblies are respectively of a box structure with the fixed end being gradually thinned to the free end, the length of each end sleeper beam assembly in the horizontal direction is larger than that of each middle sleeper beam assembly, and the height of each end sleeper beam assembly in the vertical direction is smaller than that of each middle sleeper beam assembly. The cross-mounting bottom frame device can combine two double-shaft steering frames into a four-shaft steering frame.

Description

technical field [0001] The invention relates to railway vehicle structure technology, in particular to a straddle-mounted underframe device capable of combining two two-axle bogies into one four-axle bogie. Background technique [0002] At present, two-axle bogies are the most widely used on railway vehicles, and railway freight cars in various countries generally use four-axle vehicles with two two-axle bogies. The same is true for my country's railway general-purpose freight cars. However, the maximum carrying capacity of the two-axle bogie is limited by the allowable axle load, that is, the bogie's own weight plus the center plate load cannot exceed the sum of the allowable axle loads of its two axles. Therefore, it is no longer possible to use two-axle bogies for special-purpose trucks with a total weight exceeding the allowable axle load, and can only use multi-axle bogies or bogie groups that can meet the requirements of heavy-duty trucks, that is, increase the number...

AI Technical Summary

Problems solved by technology

However, the design of the integrated four-axle bogie is difficult, the cycle is long, and the labor cost and time cost in research and development are relatively large

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