CN107972613B - High-efficient energy-absorbing device that contracts bursts in grades - Google Patents
High-efficient energy-absorbing device that contracts bursts in grades Download PDFInfo
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- CN107972613B CN107972613B CN201711137524.5A CN201711137524A CN107972613B CN 107972613 B CN107972613 B CN 107972613B CN 201711137524 A CN201711137524 A CN 201711137524A CN 107972613 B CN107972613 B CN 107972613B
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- wall
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- energy
- rear shell
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/023—Details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R2019/026—Buffers, i.e. bumpers of limited extent
Abstract
The invention discloses a high-efficiency energy absorption device for graded collapse, which comprises a front shell, a rear shell, a gasket, a filler and an elastic piece, wherein the front shell is provided with a front opening and a rear opening; the front shell comprises an inner wall, an outer wall and a connecting wall, wherein the connecting wall is expanded forwards in a horn structure from the front end of the inner wall, the outer wall covers the connecting wall and the front end part of the inner wall, the front end of the outer wall is connected with the front end of the connecting wall, and the outer wall, the connecting wall and the inner wall form an annular groove in a surrounding mode; the gasket is arranged in the rear shell and divides the inner space of the rear shell into a front part and a rear part, the filler is arranged in the space of the rear part of the rear shell, the filler is of a hollow structure, and the elastic piece is positioned in the middle of the filler; the inner wall is inserted into the space of the front part of the rear shell, the inner wall and the elastic piece press the gasket from two sides respectively, and the diameter of the rear shell is between the maximum diameter and the minimum diameter of the connecting wall. The energy absorption device has the advantages of high energy absorption efficiency, capability of reducing impact acceleration and simple structure.
Description
Technical Field
The invention relates to a high-efficiency energy absorption device for graded collapse, and relates to the technical field of automobile safety.
Background
With the development of the automobile industry and the gradual improvement of the living standard of people, the automobile holding amount is continuously increased, and the automobile safety becomes an important performance which is increasingly concerned by people. When an automobile collides, the energy absorption device connected with the anti-collision beam plays a vital energy absorption role, can reduce collision injury suffered by passengers to the maximum extent, reduces the harm of traffic accidents, and has effective protection on the life and property safety of drivers. However, the traditional energy absorption box has a single energy absorption form, a poor energy absorption effect and low energy absorption efficiency, and can not perform good buffering energy absorption on automobile collision to the maximum extent. When an accident occurs, particularly when a vehicle is in a high-speed state, the energy absorption capacity of the conventional energy absorption box is difficult to effectively buffer or absorb impact caused by collision, so that a longitudinal beam and a passenger compartment bear a large amount of impact energy and generate large impact acceleration, and the life safety of passengers is seriously threatened.
Disclosure of Invention
The invention provides a high-efficiency energy absorption device for graded collapse, which has high energy absorption efficiency, can reduce impact acceleration and has a simple structure. The technical scheme adopted by the invention for solving the technical problems is as follows:
a high-efficiency energy absorption device for graded collapse comprises a front shell, a rear shell, a gasket, filler and an elastic piece; the front shell comprises an inner wall, an outer wall and a connecting wall, wherein the inner wall is of a cylindrical structure with an opening on the front end face, the connecting wall is expanded and extended forwards from the front end of the inner wall in a horn structure, the outer wall is of a shaft sleeve structure and covers the connecting wall and the front end part of the inner wall, the front end of the outer wall is connected with the front end of the connecting wall, and the outer wall, the connecting wall and the inner wall form an annular groove in a surrounding mode; the back shell is a cylindrical structure with an opening on the front end face, the gasket is arranged in the back shell and divides the inner space of the back shell into a front part and a back part, the filler is arranged in the space of the back part of the back shell, the filler is of a hollow structure, and the elastic piece is positioned in the middle of the filler; the inner wall is inserted into the space of the front part of the rear shell, the inner wall and the elastic piece press the gasket from two sides respectively, and the diameter of the rear shell is between the maximum diameter and the minimum diameter of the connecting wall.
In a preferred embodiment: the elastic member is a spring; the front shell, the rear shell, the elastic element and the shaft core of the filler are positioned on the same straight line.
In a preferred embodiment: still include the cross reinforcing plate, this cross reinforcing plate sets up in this connecting wall.
In a preferred embodiment: the front shell, the rear shell and the cross reinforcing plate are all made of aluminum alloy materials.
In a preferred embodiment: the cross reinforcing plate is connected with the connecting wall through welding.
In a preferred embodiment: the filler is a nanofiber material filler; the filler is a porous structure.
In a preferred embodiment: the filler is made of light carbon fiber filaments and epoxy resin composite material with thermosetting property, the carbon fiber filaments are randomly arranged in the epoxy resin, and the carbon fiber filaments are crossed with each other.
In a preferred embodiment: the diameter of the gasket corresponds to the inner diameter of the rear shell; the outer surface of the filler is attached to the inner surface of the rear shell.
In a preferred embodiment: the elastic part is a hollow spring formed by rolling a hollow circular tube by a spring coiling machine.
Compared with the background technology, the technical scheme has the following advantages:
1. staged collapse characteristics
The energy absorption collapse is divided into five stages: (1) when collision occurs, the elastic part is compressed and the filler buffers certain impact energy to reduce instantaneous impact acceleration and reduce instantaneous load borne by a passenger compartment, and the elastic part in the process helps to reduce impulse in the force storage stage, so that huge initial peak force of collision generated when the accident occurs is reduced, and the buffering capacity of the energy absorption element in the energy absorption process is improved; (2) when the impact force is large, after the elastic element reaches the elastic deformation limit, the external impact force can continue to crush the elastic element, so that the hollow spring continues to generate plastic extrusion deformation and enters an energy absorption stage. The filler is crushed to absorb a large amount of energy, then the rear shell is contacted with the connecting wall, impact force along the longitudinal beam direction is guided to the periphery to achieve the buffering effect, the impact acceleration is continuously reduced, the impact borne by the passenger compartment is slowed down, the secondary injury to members caused by overlarge acceleration is prevented, meanwhile, the rear shell starts to be crushed to absorb the impact energy, and the first-stage energy absorption is realized; (3) the caliber of the horn-shaped structure is gradually enlarged along the collision direction, so that the front shell can continuously outwardly enlarge the caliber of the compressed rear shell so as to tear the rear shell, and the structure utilizes the energy absorption capacity of the materials again, so that the specific energy absorption of the energy absorption device is increased; (4) the hollow spring and the filler are completely crushed after the compression is continued, at the moment, the top of the front shell starts to absorb energy and is combined with the rear shell to form a double-layer closed energy absorption structure which is a secondary energy absorption structure, and compared with the traditional single thin-wall structure, the process can absorb more energy; (5) the rear shell is torn at the connecting wall of the front shell and then is filled in the groove of the front shell, when the secondary energy absorption structure is crushed, the circular truncated cone of the front shell, which is provided with the induction groove, and the completely deformed rear shell filled in the groove begin to play an energy absorption role, so that the third-level energy absorption structure is formed, and meanwhile, the energy absorption capacity of the part of the deformed energy absorption material of the rear shell can be reused. Through the graded collapse energy absorption structure, the strong impact acceleration generated by collision can be reduced step by step, an ideal buffering effect is achieved, and the impact borne by a passenger compartment is relieved.
2. Efficient buffering and energy absorption characteristics
The invention provides a high-efficiency energy absorption device for graded collapse, which has multiple energy absorption modes and can be carried out at the same time through different forms: the elastic element is compressed to store force for buffering and crushing energy absorption, the filler is compressed to crush energy absorption, the rear shell is torn to absorb energy, and the front shell, the filler and the cross reinforcing plate are compressed to absorb energy. The material of the rear shell is repeatedly utilized, the energy absorption efficiency is maximized, the collision kinetic energy is quickly absorbed in the plastic deformation generated by various forms of the material, and the damage is reduced to the minimum. The hollow spring has the advantages that the force accumulation process in the first stage can help to reduce the huge initial peak force of collision generated in the accident, and the buffering effect is achieved; after the second stage reaches the elastic deformation limit, the hollow spring can be continuously squashed by external impact force, the hollow spring is continuously enabled to generate plastic extrusion deformation, and the energy absorption stage is started, so that the initial peak force of collision is reduced, a certain energy absorption effect is achieved, and the energy absorption effect of the hollow spring in the energy absorption device is maximized. The filler adopted by the energy absorption device is made of light carbon fiber yarns and epoxy resin composite material with thermosetting property. After composite molding, the fiber yarns are randomly arranged in the epoxy resin, so that each angle has strong energy absorption capacity, and the fiber yarns are mutually crossed and interwoven to absorb more energy in the compression process. Compared with aluminum materials, the aluminum material has the characteristics of light weight, stronger energy absorption performance and easy forming, effectively improves the whole energy absorption capacity of the energy absorption device, and simultaneously realizes the purpose of light weight. The novel structures effectively highlight the advantages of the energy absorption device in terms of crash resistance and high-efficiency energy absorption.
3. High adaptability to collision angle, good stability and light weight
In the process of collision of vehicles, the vehicles are mostly in inclined collision with an angle, and the thin-walled tube energy absorption structure with a relatively simple traditional structure is easy to generate instability phenomenon when the vehicles are in inclined collision. The invention provides a horn-shaped structure, which is supported by a cross reinforcing plate, so that the structural stability and robustness of the horn-shaped structure are greatly improved. When the collision takes place, even can stably produce under the high-speed impact condition of multi-angle and tear the energy-absorbing effect, ensured multi-operating mode multi-angle adaptability. The nanofiber material is a novel composite material prepared from light carbon fiber yarns and an epoxy resin composite material with thermosetting property, is light in weight, large in energy absorption capacity and good in light weight effect, can exert great specific energy absorption when being applied to the field of energy absorption, and is beneficial to realization of light weight because the nanofiber filler is of a porous structure. The hollow spring plays an energy absorption role, reduces the use of materials and achieves the aim of light weight. The front shell and the cross reinforcing plate are made of aluminum alloy 6061O-state materials which are high in collision capacity and light in weight, and after interaction of extrusion, tearing, crumpling and the like, the material utilization rate is improved, so that the whole energy absorption ratio is high, and the realization of light weight is facilitated.
4. Simple and convenient processing, preparation and assembly and high sustainable usability
The high-efficiency energy absorption device with the graded collapse characteristic can be manufactured only by simple cutting machining and the like, is convenient and quick to assemble, avoids complex machining processes on the whole, and is low in manufacturing cost. The filler is made of a light carbon fiber and epoxy resin composite material, the front shell, the rear shell and the cross reinforcing plate are made of aluminum alloy materials, the materials are good in corrosion resistance and oxidation resistance and high in durability, and the sustainable usability of the energy absorption device can be effectively improved.
Drawings
The invention is further illustrated by the following figures and examples.
FIG. 1 is a schematic perspective view illustrating a staged collapse energy absorber according to the present invention.
FIG. 2 is a schematic cross-sectional view of the energy absorber of FIG. 1 with a stepped collapse.
FIG. 3 is a schematic perspective exploded view of the front housing, the cross-shaped stiffener, and the pad of the energy absorber of FIG. 1.
FIG. 4 is a schematic perspective exploded view of the rear housing, the elastic member and the filler of the energy absorption device of FIG. 1.
FIG. 5 is an enlarged end view of the elastic member of the energy absorber of FIG. 1.
Detailed Description
Referring to fig. 1 to 5, a staged-collapse energy-absorbing device according to the present invention includes a front shell 10, a rear shell 20, a gasket 30, a filler 40, and an elastic member 50.
The front case 10 includes an inner wall 12, an outer wall 14, and a connecting wall 16, the inner wall 12 is a cylindrical structure with an open front end, the connecting wall 16 is expanded forward from the front end of the inner wall 12 in a horn structure, the outer wall 14 is in a sleeve structure and covers the connecting wall 16 and the front end of the inner wall 12, the front end of the outer wall 14 is connected to the front end of the connecting wall 16, and the outer wall 14, the connecting wall 16, and the inner wall 12 enclose an annular groove 18.
The rear case 20 is a cylindrical structure with an open front end face, the gasket 30 is disposed in the rear case 20 and divides the inner space of the rear case into a front part and a rear part, and the filler 40 is disposed in the space of the rear part of the rear case 20. The packing 40 has a hollow structure, and the elastic member 50 is located at the middle of the packing 40. The inner wall 12 is inserted into the space of the front portion of the rear case 20, and the rear end surface of the inner wall 12 and the elastic member 50 press the gasket 30 from both sides, respectively. The rear case 20 has a diameter between the maximum diameter and the minimum diameter of the connection wall 16, that is, the rear case 20 is inserted along the middle of the groove 18.
The elastic member 50 is a spring, and is a hollow spring formed by rolling a hollow circular tube by a spring coiling machine. The axes of the front shell 10, the rear shell 20, the elastic element 50 and the filler 40 are positioned on the same straight line, so that the energy absorbing device is not easy to be unstable under multi-angle high-speed impact conditions.
A cross reinforcement plate 60 is also included, the cross reinforcement plate 60 being disposed within the connecting wall 16. The front case 10, the rear case 20 and the cross reinforcing plate 60 are made of aluminum alloy. The cross reinforcement plate 60 is connected to the connecting wall 16 by welding. The cross reinforcement plate 60 serves to prevent the front shell from deforming prior to the rear shell during a collision, and also serves to enhance the structural stability and strength of the horn structure (connecting wall 16) to ensure that it plays a stabilizing role in further tearing energy absorption later.
The filler 40 is a nanofiber material filler; the filler 40 is a porous structure. The filler 40 is made of a composite material of light carbon fiber filaments and epoxy resin having thermosetting property, the carbon fiber filaments are randomly arranged in the epoxy resin, and the carbon fiber filaments are crossed with each other.
The diameter of the gasket 30 corresponds to the inner diameter of the rear shell 20 to form a sealed space, and the outer surface of the filler 40 is attached to the inner surface of the rear shell 20, so that the compression of the spring and the nanofiber material is more sufficient, and the energy absorption efficiency is higher.
The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents.
Claims (9)
1. The utility model provides a high-efficient energy-absorbing device that contracts is ulcerated in grades which characterized in that: comprises a front shell, a rear shell, a gasket, a filler and an elastic piece; the front shell comprises an inner wall, an outer wall and a connecting wall, wherein the inner wall is of a cylindrical structure with an opening on the front end face, the connecting wall is expanded and extended forwards from the front end of the inner wall in a horn structure, the outer wall is of a shaft sleeve structure and covers the connecting wall and the front end part of the inner wall, the front end of the outer wall is connected with the front end of the connecting wall, and the outer wall, the connecting wall and the inner wall form an annular groove in a surrounding mode; the back shell is a cylindrical structure with an opening on the front end face, the gasket is arranged in the back shell and divides the inner space of the back shell into a front part and a back part, the filler is arranged in the space of the back part of the back shell, the filler is of a hollow structure, and the elastic piece is positioned in the middle of the filler; the inner wall is inserted into the space of the front part of the rear shell, the inner wall and the elastic piece press the gasket from two sides respectively, and the diameter of the rear shell is between the maximum diameter and the minimum diameter of the connecting wall.
2. The energy-absorbing device for staged collapse as claimed in claim 1, wherein: the elastic member is a spring; the front shell, the rear shell, the elastic element and the shaft core of the filler are positioned on the same straight line.
3. The high-efficiency energy absorption device for the staged collapse according to claim 1 or 2, wherein: still include the cross reinforcing plate, this cross reinforcing plate sets up in this connecting wall.
4. The energy-absorbing device for staged collapse as claimed in claim 3, wherein: the front shell, the rear shell and the cross reinforcing plate are all made of aluminum alloy materials.
5. The energy-absorbing device for staged collapse as claimed in claim 4, wherein: the cross reinforcing plate is connected with the connecting wall through welding.
6. The high-efficiency energy absorption device for the staged collapse according to claim 1 or 2, wherein: the filler is a nanofiber material filler; the filler is a porous structure.
7. The energy-absorbing device for staged collapse as claimed in claim 6, wherein: the filler is made of light carbon fiber filaments and epoxy resin composite material with thermosetting property, the carbon fiber filaments are randomly arranged in the epoxy resin, and the carbon fiber filaments are crossed with each other.
8. The energy-absorbing device for staged collapse as claimed in claim 7, wherein: the diameter of the gasket corresponds to the inner diameter of the rear shell; the outer surface of the filler is attached to the inner surface of the rear shell.
9. The energy-absorbing device for staged collapse as claimed in claim 2, wherein: the elastic part is a hollow spring formed by rolling a hollow circular tube by a spring coiling machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711137524.5A CN107972613B (en) | 2017-11-16 | 2017-11-16 | High-efficient energy-absorbing device that contracts bursts in grades |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711137524.5A CN107972613B (en) | 2017-11-16 | 2017-11-16 | High-efficient energy-absorbing device that contracts bursts in grades |
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| CN107972613A CN107972613A (en) | 2018-05-01 |
| CN107972613B true CN107972613B (en) | 2020-10-09 |
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| CN201711137524.5A Active CN107972613B (en) | 2017-11-16 | 2017-11-16 | High-efficient energy-absorbing device that contracts bursts in grades |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110949297B (en) * | 2019-12-24 | 2023-10-31 | 华侨大学 | Front energy absorber for passenger car |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001090764A (en) * | 1999-09-20 | 2001-04-03 | Nippon Petrochem Co Ltd | Striking energy absorbing device |
| EP1305199B1 (en) * | 2000-07-29 | 2006-07-05 | Sieghard Schneider | Plunger buffer |
| DE102004013713A1 (en) * | 2004-03-18 | 2005-10-20 | Benteler Automobiltechnik Gmbh | bumper system |
| EP2692588A1 (en) * | 2011-03-28 | 2014-02-05 | JFE Steel Corporation | Shock-absorbing member |
| CN103410903A (en) * | 2013-07-22 | 2013-11-27 | 宁波鑫鑫鑫寅电气有限公司 | Damping rubber buffer |
| DE102013110033A1 (en) * | 2013-09-12 | 2015-03-12 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Deformation element, deformation device and computer program |
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