Composite type energy absorbing device with thin-wall metal tube filled based on cut honeycomb structure

Abstract

The invention discloses a composite type energy absorbing device with a thin-wall metal tube filled based on a cut honeycomb structure. The problems that an energy absorbing device is single in energyabsorbing manner, and overrange impact load protection cannot be achieved can be solved. The device is composed of a wedge-shaped diameter expansion block with a parallel blade set, the thin-wall metal tube, the honeycomb structure and an air leakage protection chassis, an inner cavity of the thin-wall metal tube is coaxially filled with the honeycomb structure, the wedge-shaped diameter expanding block is coaxially and tangently placed on an upper port of the thin-wall metal tube, the air leakage protection chassis is coaxially welded to a lower port of the thin-wall metal tube, an air leakage groove of the chassis coincides with a blade face of the wedge-shaped diameter expanding block, when the wedge-shaped diameter expanding block bears conventional impact loads, the parallel blade set generates cutting energy absorbing on the honeycomb structure, the metal tube generates diameter expanding plastic energy absorbing, when the wedge-shaped diameter expanding block bears the overrange impact load, the honeycomb structure generates buckling plastic energy absorption, low-acceleration response and the overrange impact load protection of a vehicle during conventional collision can be achieved, the energy absorbing effect is good, and key parts can be repeatedly used.

Description

technical field [0001] The invention relates to the technical field of passive safety impact energy-absorbing devices, in particular to an impact-protective energy-absorbing device based on a cut honeycomb structure filled thin-walled metal tube under the combined action mechanism of cutting, diameter expansion and buckling. Background technique [0002] Energy-absorbing devices are widely used in impact environments. Especially with the development of high-speed traffic, energy-absorbing devices are an important part of ensuring vehicle safety. They can absorb collision kinetic energy through changes in their own structures, thereby protecting personnel's lives. For this reason, the traffic department sets the fatal acceleration or threshold acceleration of traffic accidents as 5000m / s 2 . When the acceleration response exceeds this threshold during the collision impact, the life of the personnel may be in danger. This puts higher requirements on the low acceleration resp...

AI Technical Summary

Problems solved by technology

[0005] The technical problems to be solved by the present invention are single energy absorption mode, no over-range impact load protection, high requirements for cutting energy absorption on blade material and processing technology, difficulty in compound sequential energy absorption control, and excessive acceleration caused by peak stress and other problems, a new composite energy-absorbing device is provided

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