Expansion and contraction combined type energy-absorbing anti-creeper for railway vehicle

Abstract

The invention discloses an expansion and contraction combined type rail vehicle energy absorption anti-creeper which comprises an inner pipe and an outer pipe which are coaxially arranged in a sleeved mode and a pressure applying pipe with the rear end inserted into an interlayer of the front ends of the inner pipe and the outer pipe, and the inner pipe contracts and the outer pipe expands under extrusion of the pressure applying pipe in the length direction. Compared with the prior art that energy is absorbed only by means of a single form (such as a crushing form, a cutting form, an expansion form or a contraction form), the technical scheme provided by the embodiment has the advantages that through combination of the expansion form and the contraction form, the thickness and the deformation amount of each deformation pipe (the inner pipe and the outer pipe) can be effectively reduced on the premise that the energy absorption capacity is not reduced, and the energy absorption efficiency is improved. The thickness of the outer pipe and the reducing amount of the inner pipe are reasonably distributed, the probability that the outer pipe is torn and the inner pipe is bent due to the too large reducing amount is reduced, the reliability of equipment is improved, the service life of the equipment is prolonged, and it is ensured that the energy absorption task is completed.

Description

technical field [0001] The invention mainly relates to the technical field of passive safety of rail transit vehicles, in particular to an expansion-contraction combined energy-absorbing anti-climbing device for rail vehicles. Background technique [0002] With the rapid development of rail transportation and the continuous improvement of train operation speed, people pay more and more attention to the safety of train operation. Although the probability of collision accident of railway vehicles is relatively small, high-speed trains have a relatively large initial impact. Kinetic energy, once a collision occurs, the loss will be enormous. The anti-climbing energy-absorbing device is used for absorbing and dissipating the collision energy at the front end of the vehicle, alleviating the impact load, and protecting the life safety of personnel to the greatest extent when the train vehicle has an inevitable collision accident. It is the passive safety of rail trains. important...

AI Technical Summary

Problems solved by technology

[0003] The existing forms of energy-absorbing devices are mainly single crushing type, cutting type, expansion type, contraction type, etc. The crushing type energy absorption based on compressible materials can make the load change smooth, but the energy absorption capacity is obviously insufficient. The cutting-type energy-absorbing tool cutting metal materials absorbs a lot of energy, but the impact load is large in the initial stage, the cutter is easy to break, and it is difficult to control the steady change of cutting force, which is not conducive to the safety of drivers and passengers

Separate expansion and contraction types have defects such as large peak force and difficult necking

It can be seen that the existing energy-absorbing devices have their own advantages and disadvantages, and only relying on one energy-absorbing method cannot effectively and smoothly absorb the collision energy of the vehicle

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