CN107600016B - Automobile collision energy absorbing device - Google Patents

Abstract

The invention discloses an automobile collision energy absorbing device, which comprises an sine ripple anti-collision beam and a reinforced energy absorbing box; the anti-collision beam comprises a foam arch plate, a sine ripple shell and a filling layer; the foam arch plate is arranged at the front end of the sine ripple shell; the upper and lower surfaces of the sine ripple shell are in a crumple ripple shape, a pair of wavy ripple thin wall plates corresponding to sine wave peaks and wave troughs are arranged in the cavity of the sine ripple shell, and the filling layer is filled outside the wave range; the outer part of the energy-absorbing box is provided with a pleated cylinder thin-wall structure which is circumferentially and regularly arranged, the inner part of the energy-absorbing box is provided with an inner variable cross-section circular thin-wall structure, and the cylinder thin-wall structure is connected with the inner variable cross-section circular thin-wall structure through an sine ripple-shaped reinforcing rib plate; one end of the energy absorption box is connected with the rear end of the sine ripple shell, and the other end of the energy absorption box is connected with the front longitudinal beam of the automobile. The invention solves the problems of unstable energy absorption, low energy absorption efficiency and poor multi-angle impact adaptation of the traditional automobile anti-collision beam, so as to protect the life and property safety of automobile passengers.

Description

A car collision energy absorbing device

Technical field

The invention relates to the field of passive safety protection of automobiles, and in particular to a collision energy-absorbing device composed of an anti-collision beam and an energy-absorbing box when a car collides.

Background technique

With the advancement of industrial technology, the automobile industry has developed rapidly and the per capita share has increased significantly. While improving human living standards, it has also led to frequent traffic accidents. Motor vehicle traffic accidents have always been a worldwide problem, threatening human life and property safety. Therefore, improving the crashworthiness protection of automobiles has always been a challenging issue. When a car collides, the anti-collision beams and energy-absorbing boxes at the front and rear of the car body convert the collision kinetic energy into deformation energy through irreversible deformation to protect personnel safety. At present, the anti-collision beams used in most automobile bodies have a simple cavity structure, and the energy-absorbing boxes matched with them are still common-configuration pipe fittings, including thin-walled straight pipes, thin-walled tapered pipes, etc. When a car is in a forward collision, the traditional anti-collision beam assembly structure has stable mechanical impact characteristics. However, in actual motor vehicle accidents, most of them are angled oblique collisions. The traditional thin-walled anti-collision beam assembly structure Mechanical instability is prone to occur, and the limitations of energy absorption and member protection become increasingly apparent. Due to the uncertainty of collision factors, a good anti-collision beam assembly structure should maintain a certain degree of mechanical stability during severe collisions to ensure that the collision structure produces stable deformation, so that the collision energy can be effectively absorbed. Therefore, the automobile front anti-collision beam and crash box assembly structure composed of traditional thin walls can no longer meet the current automobile safety requirements for anti-collision structures. It is particularly important to design a new type of anti-collision beam structural assembly.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings of the existing technology, provide an automobile collision energy-absorbing device with a simple structure, reasonable configuration, and high stability, and overcome the unstable energy absorption, low energy absorption efficiency, and multi-angle impact adaptability of traditional automobile anti-collision beams. To protect the lives and property of car occupants.

In order to solve the above technical problems, the present invention provides an automobile collision energy-absorbing device, which mainly includes two parts: a sinusoidal corrugated anti-collision beam and a reinforced energy-absorbing box.

The sinusoidal corrugated anti-collision beam mainly includes a front-end foam arch plate, a sinusoidal corrugated shell and a filling layer. The foam arch plate is installed on the front end of the sinusoidal corrugated shell and has a certain curvature. Its material is engineering foam plastic, and it can ensure the safety of pedestrians as much as possible in cooperation with the front bumper. In addition, the sinusoidal corrugated shell is different from the traditional anti-collision beam shell. In addition to the collapse corrugated shape on its upper and lower surfaces, a pair of corrugated thin-walled plates corresponding to the sinusoidal wave peaks and troughs are arranged inside the cavity. , fill the corresponding fill layer outside the waveform range. The filling layer may include lightweight and high-strength aluminum foam, reinforced rubber, etc. When the sinusoidal corrugated anti-collision beam is impacted by an external force, the two internal corrugated thin-walled plates interact with each other during the collision due to the relative peaks and troughs of the waves, which can effectively improve energy absorption, and the corrugated surface can induce the shell to collapse, which is incompatible with the filling. During the extrusion process, the material of the filling layer extends into the waveform and expands, further guiding the stable deformation of the structure when it collides and collapses.

The reinforced energy-absorbing box has a polycellular cylindrical structure, in which the outer part is a thin-walled corrugated cylindrical structure arranged regularly in the circumferential direction, and the inner part is a circular thin-walled structure with an internally variable cross-section and a sinusoidal corrugated reinforcing rib plate. The sinusoidal corrugated stiffening plate connects the inner variable cross-section thin-walled structure and the outer cylindrical thin-walled structure. The internally variable cross-section thin-walled structure is less likely to become unstable when impacted at multiple angles and has good stability. Combined with the sinusoidal corrugated stiffening plate, its mechanical properties are further improved. Preferably, the sinusoidal corrugated reinforced rib plate is made up of a trapezoidal flat wall surface and a sinusoidal corrugated curved surface that are spliced together through slots. The internally variable cross-section circular thin-walled structure is composed of a non-tapered circular tube and a tapered circular tube. Among them, the tapered end has a larger cross-sectional diameter and is at the bottom of the reinforced energy-absorbing box, that is, the other side of the impact end.

The invention has the following beneficial effects:

1. Collapse deformation is stable.

The upper and lower sides of the sinusoidal corrugated anti-collision beam shell and the middle plate surface of the present invention are in the shape of collapse corrugations. Its structural form has a certain inducing effect on impact strain, prompting the sinusoidal corrugated anti-collision beam to produce effective energy-absorbing and stable deformation. . The filling layer expands and penetrates into the wave space during the extrusion process, and interacts with the collapse wave to produce more stable deformation in the direction of the impact force. Similarly, the wrinkle structure arranged on the outside of the reinforced energy-absorbing box of the present invention, as well as the sinusoidal corrugated reinforced rib plate composed of a trapezoidal flat wall surface and a sinusoidal corrugated surface spliced together through slots, are smaller than the wall surface of an ordinary multi-cell tube body. The sinusoidal corrugated stiffeners guide the wall deformation during the collision and collapse process, thereby affecting the overall collapse form of the energy-absorbing box, effectively reducing the initial collision force and making the impact effect smoother.

2. High energy absorption efficiency and obvious anti-collision effect.

The sinusoidal corrugated shell in the present invention is combined with the filling layer in the form of a corrugated surface. Under the mechanical deformation that ensures smooth transition of impact, the filling layer expands and deforms when it penetrates into the wave space, and cooperates with the corrugated walls to squeeze each other, and the internal corrugated lines The collision and interference between thin-walled plates can effectively improve the energy absorption efficiency of the sinusoidal corrugated shell. The sinusoidal corrugated reinforcing ribs connected internally of the reinforced energy-absorbing box in the present invention and the wall surface of the cylindrical energy-absorbing box form a reinforced multi-cell structure, and the energy-absorbing efficiency is higher than that of energy-absorbing boxes with ordinary structures.

3. High adaptability to multi-angle impact

The internally variable cross-section circular thin-walled structure of the reinforced energy-absorbing box involved in the present invention is composed of a non-tapered circular tube and a tapered circular tube. The tapered end is at the bottom of the energy-absorbing box, that is, the other side of the impact end. . By combining the bottom taper structure with the sinusoidal corrugated stiffener plate, it effectively resists the occurrence of mechanical instability under angular impact. By setting a reasonable proportional match between the parameters of the non-tapered circular tube and the tapered circular tube, and selecting an appropriate proportional coefficient, the stability of the overall structure under multi-angle oblique impact can be effectively improved, the utilization rate of the material can be better utilized, and the absorption rate can be avoided. The energy structure becomes unstable under oblique impact and greatly reduces the energy absorption efficiency, endangering the lives of car occupants and their property.

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, the automobile collision energy absorbing device of the present invention is not limited to the embodiments.

Description of the drawings

Figure 1 is a schematic structural diagram of an automobile collision energy absorbing device according to the present invention;

Figure 2 is an end view of the sinusoidal corrugated anti-collision beam of the present invention;

Figure 3 is a schematic structural diagram of the reinforced energy-absorbing box of the present invention;

Figure 4 is a top view of the reinforced energy-absorbing box of the present invention;

Figure 5 is a cross-sectional view of the internally variable cross-section circular thin-walled structure of the present invention;

Figure 6 is a schematic diagram of the sinusoidal corrugated reinforced rib plate of the present invention;

Figure 7 is a schematic diagram of the sine wave surface of the present invention;

Figure 8 is a schematic diagram of the trapezoidal flat wall structure of the present invention.

Reference signs: 1. Sinusoidal corrugated anti-collision beam, 11. Foam arch plate, 12. Sinusoidal corrugated shell, 13. Corrugated thin wall panel, 14. Filling layer, 15. First thin plate, 16. Second Thin plate, 2. Reinforced energy-absorbing box, 21. Cylindrical thin-walled structure, 211. Wrinkles, 22. Internally variable cross-section circular thin-walled structure, 221. Non-tapered circular tube, 222. Tapered circular tube, 23. Sine type Corrugated reinforced rib plate, 231. Trapezoidal flat plate wall surface, 2311. Card slot, 232. Sine wave curved surface, 24. Third thin plate, 25. Fourth thin plate.

Detailed ways

The description will be further elaborated below with reference to specific embodiments. It should be noted that the following examples are only used to illustrate the present invention and do not limit the technical solutions described in the present invention. All technical solutions and improvements that do not depart from the scope of the present invention should be included in the scope of the claims of the present invention.

The invention proposes an automobile collision energy-absorbing device, as shown in Figures 1 and 2. The automobile collision energy-absorbing device proposed by the invention mainly includes a sinusoidal corrugated anti-collision beam 1 and a reinforced energy-absorbing box 2. This embodiment The two can be connected by welding. Among them, the sinusoidal corrugated anti-collision beam 1 is composed of a foam arch plate 11, a corrugated thin-walled plate 13, a filling layer 14, a first thin plate 15 and a second thin plate 16 for fixation. The corrugated thin-walled beam can be made by spot welding. Both ends of the plate 13 are fixed on the first thin plate 15 and the second thin plate 16 respectively. The reinforced energy-absorbing box 2 is composed of a cylindrical thin-walled structure 21 with wrinkles 211, a sinusoidal corrugated stiffening plate 23, and a circular thin-walled structure 22 with internal variable cross-section. In this embodiment, a third thin plate 24 and a fourth thin plate 25 are welded to both ends of the reinforced impact-absorbing box 2 respectively. The third thin plate 24 is connected to the sinusoidal corrugated anti-collision beam 1 as a welding part. The four thin plates 25 serve as flanges and are connected to the front longitudinal beam of the automobile through bolts.

Referring to Figure 2, the sinusoidal corrugated anti-collision beam 1 involved in the present invention is different from the traditional anti-collision beam shell. First, a foam arch plate 11 is arranged at the front of the sinusoidal corrugated anti-collision beam 1. The foam arch The material of the board 11 can be engineering foam plastic, which can ensure the safety of pedestrians as much as possible while ensuring lightweight. In addition, the sinusoidal corrugated shell 12 not only has a collapsed sinusoidal corrugated shape on its upper and lower surfaces, but also arranges a corrugated thin-walled plate 13 corresponding to the peaks and troughs inside the cavity, and fills the corresponding filling layer outside the corrugated range. 14. In this embodiment, the filling layer 14 may include lightweight and high-strength aluminum foam, reinforced rubber, etc., and the filling layer 14 is filled in the corrugated surface extremities of the corrugated thin-walled plate 13, the first thin plate 15 and the second thin-walled plate 13. Between the thin plates 16, there is a regular filling shape. When the sinusoidal corrugated anti-collision beam 1 is impacted by an external force, its corrugated surface can induce the sinusoidal corrugated shell 12 to collapse and cooperate with the filling layer 14. During the extrusion process, the material of the filling layer 14 extends into the waveform and expands. Further guiding the stable deformation of the structure during collision and collapse can effectively improve the energy absorption efficiency of the collision front end of the anti-collision beam.

As shown in Figure 3, the reinforced energy-absorbing box 2 involved in this embodiment has a multi-cell cylindrical structure. The exterior of the reinforced energy-absorbing box 2 is a cylindrical thin-walled structure 21 with pleats regularly arranged in the circumferential direction, as shown in FIG. 4 , and the pleats 211 are regular concave waves. The reinforced energy-absorbing box 2 has a sinusoidal corrugated rib plate 23 and an internally variable cross-section circular thin-walled structure 22 inside. The sinusoidal corrugated rib plate 23 connects the internally variable cross-section circular thin-walled structure 22 with the external The cylindrical thin-walled structure 21 is connected by nesting slots. The internally variable cross-section circular thin-walled structure 22 is less likely to become unstable during multi-angle impacts, and combined with the sinusoidal corrugated reinforcing ribs 23 further improves its mechanical properties. Figure 5 is a cross-sectional view of a circular thin-walled structure 22 with internally variable cross-section. The circular thin-walled structure 22 with internally variable cross-section includes a non-tapered circular tube 221 and a tapered circular tube 222, wherein the non-tapered circular tube The cross-sectional diameter of the tube 221 is the same as the top cross-sectional diameter of the tapered circular tube 222; the bottom cross-sectional diameter of the tapered circular tube 222 is larger than the top cross-sectional diameter; the end of the tapered circular tube 222 with a larger cross-sectional diameter is arranged on the reinforced suction The bottom of the energy box 2, that is, the other side of the impact end, is close to the front longitudinal beam of the car. By setting reasonable parameter matching ratios The anti-tilt impact capability of the reinforced energy-absorbing box 2 can be effectively adjusted, where X is the height of the non-tapered circular tube, and L is the height of the tapered circular tube. As shown in Figure 6, the sinusoidal corrugated stiffening plate 23 is composed of a trapezoidal flat plate wall surface 231 and a sine wave curved surface 232 that are spliced together through slots. The sine wave curved surface is shown in Figure 7, and the trapezoidal flat plate wall surface is shown in Figure 8. Evenly spaced slots 2311 are arranged on the trapezoidal flat wall surface 231 to facilitate connection with the sine wave curved surface 232 . By combining the bottom taper structure with the sinusoidal corrugated reinforcing rib plate 23, the mechanical instability phenomenon under angular impact is effectively resisted. By setting a reasonable parameter ratio matching between the non-tapered circular tube 221 and the tapered circular tube 222 and selecting an appropriate proportional coefficient, the stability of the entire structure under multi-angle oblique impact can be effectively improved, and the utilization rate of materials can be better utilized to avoid Due to the instability of the energy-absorbing structure under oblique impact, the energy-absorbing efficiency is greatly reduced, endangering the lives of car occupants and their property.

The above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand it. It is still possible to modify the technical solutions recorded in the foregoing embodiments, or to equivalently replace some of the technical features, and these modifications or substitutions do not deviate from the essence of the corresponding technical solutions from the spirit of the technical solutions of the various embodiments of the present invention. and scope.

Claims (9)

1. An automobile crash energy absorber, comprising: an sinusoidal ripple anti-collision beam and a reinforced energy absorption box; the sine ripple anti-collision beam comprises a foam arch plate, a sine ripple shell and a filling layer; the foam arch plate with a certain radian is arranged at the front end of the sine ripple shell; the upper surface and the lower surface of the sine ripple shell are both in a crumple ripple shape, a pair of wavy ripple thin-wall plates corresponding to sine wave peaks and wave troughs are arranged in the cavity of the sine ripple shell, and the filling layer is filled outside the wave range; the reinforced energy-absorbing box is of a multicellular cylindrical structure, the outside of the reinforced energy-absorbing box is of a pleated cylindrical thin-wall structure which is circumferentially and regularly arranged, the inside of the reinforced energy-absorbing box is of an inner variable cross-section circular thin-wall structure, and the cylindrical thin-wall structure is connected with the inner variable cross-section circular thin-wall structure through an sine wave-shaped reinforcing rib plate; one end of the reinforced energy absorption box is fixedly connected with the rear end of the sinusoidal ripple shell, and the other end of the reinforced energy absorption box is fixedly connected with the front longitudinal beam of the automobile;

the inner variable cross-section circular thin-wall structure comprises a taper-free circular pipe and a taper circular pipe which are connected; the diameter of the section of the non-taper circular tube is the same as that of the section of the top of the taper circular tube; the diameter of the section of the bottom of the taper round tube is larger than that of the section of the top of the taper round tube; one end with larger cross-section diameter of the taper circular tube is arranged at the bottom of the reinforced energy absorption box;

by setting the parameter matching proportion of the non-taper round tube and the taper round tubeThe anti-tilting impact capability of the reinforced energy-absorbing box can be effectively adjusted, wherein X is the height of a taper-free round tube, and L is the height of a taper round tube.

2. The vehicle impact energy absorber of claim 1, wherein said sinusoidal corrugated impact beam further comprises a first sheet and a second sheet for securement; one end of the corrugated thin-wall plate is fixedly connected with the first thin plate, and the other end of the corrugated thin-wall plate is fixedly connected with the second thin plate.

3. The vehicle crash energy absorber of claim 1 wherein said reinforced energy absorber box has third and fourth sheets welded to both ends thereof; the third thin plate is used as a welding piece to be connected with the sinusoidal ripple anti-collision beam, and the fourth thin plate is used as a flange plate to be connected with the automobile front longitudinal beam.

4. An automotive crash energy absorber according to claim 1 wherein the foam dome material is an engineering foam.

5. The vehicle crash energy absorber of claim 1 wherein said filler layer comprises light aluminum foam and/or reinforced rubber.

6. The crash energy absorber of claim 1 wherein said filler layer is interposed between the wave surface extremum of the corrugated thin-walled sheet, the first sheet and the second sheet in a regular filler-like pattern.

7. The vehicle crash energy absorber of claim 1 wherein said corrugations are regular concave waves.

8. The automobile collision energy absorbing device according to claim 1, wherein the sinusoidal ripple reinforcing rib plate is formed by splicing a trapezoidal flat plate wall surface and a sinusoidal wave curved surface into a whole through a clamping groove; the trapezoid flat board wall surface is evenly provided with clamping grooves with gaps.

9. The vehicle crash energy absorber of claim 1 wherein said cylindrical thin-walled structure is nested in a slot connection with said inner variable cross-section circular thin-walled structure by said sinusoidal corrugated reinforcing web.