A fluid-solid coupling four-stage collision energy absorbing device

Abstract

The invention discloses a fluid-solid coupling four-stage collision energy absorption device. The device is composed of a three-dimensional energy absorption area, a folding energy absorption area anda fluid energy absorption area which are arranged in a crossed mode from top to bottom, wherein the three-dimensional energy absorption area is a thin-wall pipe fitting with a polygonal section; thefolding energy absorption area forms circumferentially arranged rotary folding concave corners through crease lines in combination with a rotary folding mode; the fluid energy absorption area is composed of a cover plate, a supporting plate, a cylinder, an inlet valve, a pressure release valve and a pressing plate; a cavity is formed between the cylinder and the pressing plate and filled with gasor hydraulic oil, the inlet valve and the pressure release valve are arranged on the cylinder, and the supporting plate is connected with the pressing plate and the cover plate. By means of multi-stage buffering of the collision energy absorption device, the initial peak force generated in the collision process can be effectively reduced, and it can be guaranteed that the collision energy absorption device has the high energy absorption rate.

Description

technical field [0001] The invention relates to the technical field of automobile collision safety, in particular to a fluid-solid coupling four-stage collision energy-absorbing device. Background technique [0002] In the event of a collision accident, the crash energy absorbing device is very important to ensure the safety of the objects and occupants in the car. At present, people usually install collision energy-absorbing devices of different structures on parts prone to collisions such as automobiles, so as to effectively absorb the huge impact energy generated during the collision. Thin-wall structure is a kind of collision energy-absorbing device with high energy absorption rate and low cost, which is widely used in automobiles to absorb the kinetic energy generated when automobiles collide. [0003] In the actual collision process, the energy absorption effect of the existing collision energy-absorbing device is limited, and there are the following problems: [000...

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Problems solved by technology

[0003] In the actual collision process, the energy absorption effect of the existing collision energy-absorbing device is limited, and there are the following problems:

This patent only uses compressed gas energy storage and compressed gas explosion to release energy, which has the disadvantage of low energy absorption rate, and in order to achieve high energy absorption, it is necessary to ensure that the device has good sealing, which increases the difficulty and cost of device manufacturing.

[0006] 3. In order to overcome the shortcoming that the deformation mode of the collision energy-absorbing device is unstable, a small number of existing technologies achieve this goal by adding constraints, such as the publication number CN102700618A, titled "A thin-walled energy Absorber tube" patent, in which the diaphragms that act as reinforcements are arranged at certain intervals inside the thin-walled tube

Since the thin-walled energy absorbing tube adds an additional built-in structure and is precisely connected with the thin-walled tube, it brings difficulty to the processing technology

[0007] 4. In the actual collision process, there will be more complex load conditions, and the existing structure of the collision energy-absorbing box has the disadvantage of weak defect resistance, and cannot cope with complex collision loads

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