Crash-absorbing box, vehicle and method for adjusting stiffness of crash-absorbing box

Abstract

The invention discloses a crash energy absorption box, a vehicle and a method for adjusting rigidity of the crash energy absorption box. The crash energy absorption box comprises a body and a circulation control device, wherein a cavity is defined by the body; when the crash energy absorption box is extruded, the cavity is compressed; and the circulation control device is arranged between the cavity and an external open space or another cavity so as to control the size of a damping hole when fluid flows out of the cavity and adjust the rigidity of the crash energy absorption box. The crash energy absorption box has the adjustable rigidity, so that the crash rigidity of the crash energy absorption box is automatically adjusted according to the different crash speeds, crash force or crash conditions, and the effect of the crash energy absorption box is brought into full play.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a crash absorbing box, a vehicle and a method for adjusting the stiffness of the crash absorbing box. Background technique [0002] At present, the main structural form of the energy-absorbing box for passenger cars on the market is the fixed cavity type, which is to change the stiffness of the energy-absorbing box by adjusting the cross-sectional structure and material of the energy-absorbing box, so as to achieve the energy-absorbing effect. [0003] The stiffness of the passenger car energy-absorbing boxes on the market mentioned above has been determined at the design stage. During the collision process, due to the different collision speeds and collision angles when the accident occurs, the amount of energy to be absorbed is different. The rigidity of the energy-absorbing box is too large during the collision, the collapse of the energy-absorbing box is not sufficient, the ...

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Problems solved by technology

[0003] The stiffness of the passenger car energy-absorbing boxes on the market mentioned above has been determined at the design stage. During the collision process, due to the different collision speeds and collision angles when the accident occurs, the amount of energy to be absorbed is different. The rigidity of the energy-absorbing box is too large during the collision, the collapse of the energy-absorbing box is not sufficient, the cushioning effect is not ideal, and the collapsed energy-absorbing box cannot be reused, it must be replaced and repaired, and the stiffness of the energy-absorbing box may be too small during a high-speed collision. After the energy-absorbing box is completely collapsed, the energy has not been fully absorbed, which will have different impacts on the body structure and high maintenance costs

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