Metal energy absorption device

Abstract

The invention discloses a metal energy absorption device which comprises a metal anti-climbing plate, a metal energy absorption pipe and a deformation induction structure, the deformation induction structure comprises a first section, a second section, a third section and a fourth section which are sequentially connected, and the average peripheral diameter of the first section, the average peripheral diameter of the second section, the average peripheral diameter of the third section and the average peripheral diameter of the fourth section are sequentially increased; the upper end of the metal energy absorption pipe is fixedly connected with the metal anti-climbing plate, and the lower end of the metal energy absorption pipe at least sleeves the periphery of the first section of the deformation induction structure and is tightly connected with the first section; planing cutters are arranged on the upper end face of the first section along the periphery, induction grooves are formed in the inner wall of one end of the metal energy absorption pipe in the length direction, and the positions and the number of the planing cutters are matched with the positions and the number of the induction grooves. According to the metal energy absorption device, energy absorption in four forms and four stages of planing, bulging deformation, tearing and curling deformation is achieved for the metal energy absorption pipe, the four deformation modes and generated impedance force are all conducted according to pre-design, the whole process is orderly and controllable, and the energy absorption efficiency is high.

Description

technical field [0001] The invention relates to the field of rail vehicle passive safety protection, in particular to a metal energy-absorbing device. Background technique [0002] With the rapid development of the rail transit industry, the safety of rail vehicles has been paid more and more attention. As the most common energy-absorbing structure in rail vehicles, metal metal energy-absorbing devices can effectively absorb impact kinetic energy when a collision occurs, and play a decisive role in the safety of rail vehicles and passengers. Therefore, energy-absorbing devices with excellent impact characteristics are widely studied and applied. [0003] There are many inventions and creations about anti-climbing energy-absorbing devices in the prior art. For example, the invention patent CN109515468 A provides an energy-absorbing anti-climbing device for rail vehicles. The energy-absorbing principle is through planing of metal pipes and damping of fluids. For energy dissi...

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Problems solved by technology

[0003] There are many inventions and creations about anti-climbing energy-absorbing devices in the prior art, such as the invention patent CN109515468 A which provides an energy-absorbing anti-climbing device for rail vehicles, The principle of energy absorption is to dissipate energy through planing of metal pipes and damping of fluid. This technical solution combines the advantages of cutting energy absorption and hydraulic energy absorption, and improves the energy absorption and anti-eccentric load of the device. Its late resistance resistance stability is poor, and the stroke utilization rate is low; Another example is the invention patent CN111055874B which provides a multi-level anti-collision buffer structure, which can perform multi-level buffering. The principle is to cut the protrusions on the metal square tube wall and the metal The collapse of the tube is used to dissipate energy. This technical solution adopts a multi-stage scalable structure, which occupies a small space and has a good energy absorption effect, but its resistance stability is poor and the initial peak value is high.

[0004] The anti-climbing energy-absorbing devices in the prior art, especially for anti-climbing energy-absorbing devices containing metal profiles, have poor controllability during the compression deformation process, and the impact The force fluctuates greatly and the resistance is unstable, which often leads to low energy absorption efficiency

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