A working method of a fluid-solid coupling four-stage collision energy-absorbing device

Abstract

The invention discloses a working method of a fluid-solid coupling four-stage collision energy absorption device. The collision energy absorption device is composed of a three-dimensional energy absorption area, a folding energy absorption area and a fluid energy absorption area which are arranged in a crossed mode from top to bottom, wherein the folding energy absorption area forms circumferentially arranged rotary folding concave corners through crease lines in combination with a rotary folding mode; and 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. In the collision process, the fluid energy absorption area is compressed firstly to achieve first-stage buffering; then the folding energy absorption area is compressed and deformed to achieve second-stage buffering; and then the three-dimensional energy absorption area is compressed and deformed to achieve third-stage buffering; a new thin-wall energy absorption area formed after the fluid energy absorption area is compressed is finally compressed and deformed to achieve four-stage buffering is achieved. By means of the multi-stage buffering method of the energy absorption device, the initial peak force generated in the collision process can be effectively reduced, and it can be guaranteed that the 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 working method of 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 followi...

AI Technical Summary

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

Images