Double-level rigidity elastic body combined device

Abstract

The invention discloses a double-level rigidity elastic body combined device which comprises at least one low-rigidity elastic element and a high-rigidity elastic element. The low-rigidity elastic elements are arranged in an elastic body pre-compression device, and the low-rigidity elastic elements and the high-rigidity elastic element are arranged in a serial connection manner under the effect of a pre-compression load F1. The double-level rigidity elastic body combined device has the advantages that the double-level rigidity elastic body combined device has such combined rigidity that the device is hard at first and then is flexible; the double-level rigidity elastic body combined device is high in compression rigidity when the double-level rigidity elastic body combined device is used as an elastic suspension device of an axle box of a railway vehicle and deformation displacement is extremely small, and the compression rigidity of the device starts to be deteriorated when the deformation displacement reaches a set numerical value, so that the conflict problem that requirements on the straight and snaking critical speed of an existing vehicle and the curve line negotiating capacity of the existing vehicle cannot be simultaneously met can be effectively solved; the device further can be applied to various places among relevant components of railway vehicles, the service places have requirements on the combined rigidity of elastic body damping devices, and the elastic body damping devices with the combined rigidity are required to be hard at first and then flexible, so that impact of the vehicles on wheel tracks can be buffered, the dynamic performance of the vehicles can be enhanced, the running safety of the vehicles can be guaranteed, and the operation quality of the railway vehicles can be greatly improved.

Description

technical field [0001] The invention relates to an elastic body buffering and damping device, in particular to a two-stage rigidity type elastic body combination device mainly used for buffering and damping between railway vehicle components. Background technique [0002] A railway vehicle is a special vehicle running on a specially designed track, which can guide itself without controlling the direction when running along the specially designed track. The bogie is one of the most important components on a railway vehicle, it supports the weight of the entire cargo and the weight of the car body itself. Traditional bogies are mostly three-piece structures consisting of two side frames and a bolster. The pedestal frame at both ends of the side frame is installed on the front and rear wheel sets through the axle box bearing saddle and bearing device, and the bolster is composed of The two ends of the car are installed in the central box formed by the side frames through two s...

AI Technical Summary

Problems solved by technology

In this way, it is impossible to fully take into account the large stiffness requirements of the vehicle's straight-line snaking critical operating speed and the small stiffness requirements of the vehicle's curve passing performance. At the same time, there is also a risk of train derailment, which greatly reduces its buffering and vibration reduction effect.

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