Collision buffer

Abstract

The present invention provides a collision buffer device comprising: an outer tube assembly, including an outer tube top plate, a top outer tapered tube, an outer tube middle plate, a bottom outer tube, and an outer tube bottom plate sequentially jointed coaxially; and An inner tube assembly, arranged in the outer tube assembly, and includes an inner tube top plate, a top inner tube and a bottom inner tube with different outer diameters sequentially jointed coaxially, wherein: the inner tube top plate, and The top plate of the outer tube is fixed; one end of the top inner tube engages with the top plate of the inner tube; and one end of the bottom inner tube contacts the bottom plate of the outer tube, wherein the closed tube of the bottom outer tube is used as a collision The support portion at the other end of the tube. When impacted by a collision, the inner tube at the bottom of the inner tube assembly produces an effect of rolling and shrinking to provide energy absorption; the corrugated structure on the surface of the top outer tapered tube of the outer tube assembly folds to provide energy absorption.

Description

technical field [0001] The present invention relates to a collision buffer device, and more particularly to a collision buffer device, which produces a rolling and shrinking tube effect to provide stable buffering and energy absorption effects. Background technique [0002] There are many types of energy absorbing structures currently used in vehicle collision impact, for example, the patent document of US 6231095B1, which is used for the channel type energy absorption unit 90 of the vehicle collision impact system. Please refer to Figure 1A and 1B , the channeled energy absorbing unit 90 can absorb impact energy and prevent or minimize damage to the vehicle frame rail 94 under impact. Its basic embodiment is a tube 91 , one end of which is flared at a hole 921 in an end plate 92 and welded. When the channeled energy absorbing unit 90 is subjected to an axial load, the tube 91 splits, peels off and reverses to absorb most of the energy impact. The preferred channel 93 in...

AI Technical Summary

Problems solved by technology

However, after the punching and flanging of the aforementioned sub-components, it is easy to produce tearing crack defects around the holes, so that the structure may break during the impact process, resulting in discontinuous impact absorption energy.

The punching and flanging process may be completed before the trapezoidal forming, which is not easy in the trapezoidal sheet folding process, and it is easy to damage the completed punching and flanging geometric shape; if the trapezoidal forming is completed first and then the punching and flanging is performed, it needs to be done from the outside to the inside Stamping from the inside to the outside each time requires additional molds, man-hours and costs

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