阅读说明：本技术 高速公路桥梁用具有缓冲功能的防撞护栏 (Buffer function's anticollision barrier is used to highway bridge ) 是由 李东辰 李袁宗 张学金 赵星陆 随安琦 江云丁 王海玲 何亚光 周晓光 夏振磊 于 2021-08-10 设计创作，主要内容包括：本发明公开了一种高速公路桥梁用具有缓冲功能的防撞护栏,包括：护栏立柱,所述护栏立柱设置有两个,且两个所述护栏立柱的上端通过加固横杆固定连接；减速台,其安装在所述护栏立柱下表面的前端,且减速台与护栏立柱焊接连接；电阻应变计碰撞传感器,其安装在所述减速台的前端,所述电阻应变计碰撞传感器设置有四个。其实现了在护栏上增设气囊收纳盒,当车辆冲击后,传感器能够及时接收到信号,点燃充气系统,使气囊从气囊收纳盒内弹出,覆盖于护栏前端,起到柔性缓冲的作用,从而有效的避免了现有的防撞护栏整体采用钢制结构,遭遇车辆意外撞击时,缓冲效果不佳,无法减缓驾驶员所受损伤的问题。(The invention discloses an anti-collision guardrail with a buffering function for a highway bridge, which comprises: the guardrail comprises two guardrail upright posts, wherein the upper ends of the two guardrail upright posts are fixedly connected through a reinforcing cross rod; the speed reducing table is installed at the front end of the lower surface of the guardrail upright post and is welded with the guardrail upright post; and four resistance strain gauge collision sensors mounted at the front end of the deceleration stage. It has realized addding the gasbag receiver on the guardrail, and after the vehicle strikeed, the sensor can in time receive the signal, lights inflation system, makes the gasbag pop out in the gasbag receiver, covers in the guardrail front end, plays the effect of flexible buffering to the effectual current anticollision barrier of having avoided wholly adopts the steel structure, when meeting with the unexpected striking of vehicle, the buffering effect is not good, can't slow down the problem of the damage that the driver received.)

1. The utility model provides a highway bridge is with anticollision barrier that has buffer function which characterized in that includes:

the guardrail comprises two guardrail upright posts, wherein the upper ends of the two guardrail upright posts are fixedly connected through a reinforcing cross rod;

the speed reducing table is installed at the front end of the lower surface of the guardrail upright post and is welded with the guardrail upright post;

the four collision sensors of the resistance strain gauges are arranged at the front end of the deceleration table and are equidistantly distributed on the deceleration table;

the anti-collision rear plate is arranged between the two guardrail stand columns, and two sides of the anti-collision rear plate are respectively welded with the outer walls of the two guardrail stand columns;

the front anti-collision plate is arranged at the front end of the rear anti-collision plate;

the airbag storage box is mounted on the upper surface of the anti-collision front plate, three inflation mechanisms are mounted on the upper surface of the airbag storage box, and one ends of the three inflation mechanisms extend into the airbag storage box;

the buried control box is arranged at the rear end of the speed reduction table, and the input end of the buried control box is connected with the mains supply.

2. The anti-collision guardrail with the buffering function for the highway bridge as claimed in claim 1, wherein the electric resistance strain gauge collision sensor comprises a sensor base plate and a sensing shell, the sensing shell is installed at the front end of the sensor base plate, a buffering medium is installed inside the sensing shell, a vibration block is installed inside the buffering medium, the electric resistance strain gauge is installed at the upper end of the vibration block, and an electric control circuit is installed on the inner wall of the sensor base plate.

3. The anti-collision guardrail with the buffering function for the highway bridge as claimed in claim 1, wherein a mounting plate is arranged on the lower surface of the inflating mechanism, an electric connection end is arranged at the rear end of the mounting plate, an igniter is arranged at the front end of the mounting plate, an electric heating wire and explosive are arranged inside the igniter, and sodium azide is arranged outside the igniter.

4. The crash barrier with a buffering function for highway bridges as defined in claim 3, wherein a filtering layer is disposed outside said sodium azide, an anti-static ABS isolating shell is disposed outside said filtering layer, and exhaust holes are disposed on both sides of said anti-static ABS isolating shell.

5. The anti-collision guardrail with the buffering function for the expressway bridge of claim 3, wherein a single chip microcomputer main control chip, a wireless data transmission module and a GPS positioning module are installed inside the buried control box, an output end of the single chip microcomputer main control chip is electrically connected with an input end of the electric heating wire, output ends of the electric resistance strain gauge collision sensor and the GPS positioning module are electrically connected with an input end of the single chip microcomputer main control chip, and the single chip microcomputer main control chip is in bidirectional connection with the terminal machine through the wireless data transmission module.

6. The crash barrier with a buffering function for a highway bridge according to claim 1, wherein a storage cavity is formed in the air bag storage box, a foldable air bag is installed in the storage cavity, a tear-seam plastic plate is arranged on the lower surface of the air bag storage box, and both sides of the tear-seam plastic plate are connected with the air bag storage box through buckles.

7. The crash barrier with a buffering function for highway bridges as recited in claim 1, wherein a rubber pad is installed on the outer wall of said deceleration stage, a plurality of rubber bumps are provided on the upper surface of said rubber pad.

8. The crash barrier with the buffer function for the highway bridge according to claim 1, wherein the front end of the guardrail upright post is provided with an anti-fog lamp shade, the anti-fog lamp shade is internally provided with an anti-fog lamp, the periphery of the anti-fog lamp shade is provided with a lamp shade frame, and the lamp shade frame is in threaded connection with the guardrail upright post through a screw.

9. The anti-collision guardrail with the buffering function for the highway bridge as claimed in claim 1, wherein the anti-collision front plate and the anti-collision rear plate are connected through springs, a plurality of springs are arranged, a damping rod is arranged between every two adjacent springs, and one end of each damping rod is fixedly connected with the outer wall of the anti-collision rear plate.

10. The crash barrier with a buffering function for highway bridges as claimed in claim 1, wherein the outer wall of said front crash barrier is provided with ten reflective strips, and said ten reflective strips are equidistantly distributed on the surface of said front crash barrier.

Technical Field

The invention relates to the technical field of anti-collision guardrails, in particular to an anti-collision guardrail with a buffering function for a highway bridge.

Background

The guardrail is generally referred to as an industrial protective fence and is mainly used for protecting and protecting personal safety and equipment facilities in occasions such as houses, roads, commercial districts, public places and the like. The anti-collision guardrail is a typical cold-formed steel product, has the advantages of good impact resistance, low cost, long service life, higher safety, environmental protection and the like, and is mainly used for protecting and protecting highway sections and bridge sections. Common steel is made, like round steel pipe, square steel pipe or profiled sheet, the processing of spraying paint need be done usually on highway with crash barrier's surface, and used raw materials are waterproof nature material, and it is pleasing to the eye to make crash barrier appearance, and difficult rusty, and the stand part of guardrail adopts expansion bolts and ground fixed usually, brings unexpected striking when effectively alleviating the vehicle and shuttle back and forth and causes the damage of equipment, facility.

However, the whole steel structure that adopts of current anticollision barrier, when meeting with the unexpected striking of vehicle, the buffering effect is not good, can't slow down the damage that the driver received.

Disclosure of Invention

An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.

The invention also aims to provide the anti-collision guardrail with the buffering function for the highway bridge, which realizes that the air bag storage box is additionally arranged on the guardrail, and after the vehicle impacts, the sensor can timely receive signals and ignite the inflation system to enable the air bag to be popped out from the air bag storage box and cover the front end of the guardrail to play a role of flexible buffering, thereby effectively avoiding the problems that the conventional anti-collision guardrail is of a steel structure integrally, and the buffering effect is poor and the damage to a driver cannot be relieved when the vehicle is accidentally impacted.

In order to achieve the above objects and other objects, the present invention adopts the following technical solutions:

the utility model provides a highway bridge is with anticollision barrier that has buffer function, includes:

the guardrail comprises two guardrail upright posts, wherein the upper ends of the two guardrail upright posts are fixedly connected through a reinforcing cross rod;

the speed reducing table is installed at the front end of the lower surface of the guardrail upright post and is welded with the guardrail upright post;

the four collision sensors of the resistance strain gauges are arranged at the front end of the deceleration table and are equidistantly distributed on the deceleration table;

the anti-collision rear plate is arranged between the two guardrail stand columns, and two sides of the anti-collision rear plate are respectively welded with the outer walls of the two guardrail stand columns;

the front anti-collision plate is arranged at the front end of the rear anti-collision plate;

the airbag storage box is mounted on the upper surface of the anti-collision front plate, three inflation mechanisms are mounted on the upper surface of the airbag storage box, and one ends of the three inflation mechanisms extend into the airbag storage box;

the buried control box is arranged at the rear end of the speed reduction table, and the input end of the buried control box is connected with the mains supply.

Preferably, the impact sensor of the resistance strain gauge comprises a sensor base plate and a sensing shell, the sensing shell is installed at the front end of the sensor base plate, a buffering medium is installed inside the sensing shell, a vibration block is installed inside the buffering medium, the resistance strain gauge is installed at the upper end of the vibration block, and an electric control circuit is installed on the inner wall of the sensor base plate.

Preferably, the lower surface of inflating the mechanism is provided with the mounting panel, the rear end of mounting panel is provided with connects the electrical terminal, the front end of mounting panel is provided with the point firearm, the inside of point firearm is provided with heating wire and explosive, the outside of point firearm is provided with the sodium azide.

Preferably, the outside of sodium azide is provided with the filter layer, the outside of filter layer is provided with prevents static ABS isolation shell, the both sides of preventing static ABS isolation shell all are provided with the exhaust hole.

Preferably, the buried control box is internally provided with a single chip microcomputer main control chip, a wireless data transmission module and a GPS positioning module, the output end of the single chip microcomputer main control chip is electrically connected with the input end of the heating wire, the output ends of the resistance strain gauge collision sensor and the GPS positioning module are electrically connected with the input end of the single chip microcomputer main control chip, and the single chip microcomputer main control chip is in two-way connection with the terminal machine through the wireless data transmission module.

Preferably, the inside of gasbag receiver is provided with accomodates the chamber, accomodate the internally mounted in chamber and have foldable gasbag, the lower surface of gasbag receiver is provided with the tear seam plastic slab, the both sides of tear seam plastic slab are passed through the buckle and are connected with the gasbag receiver.

Preferably, the outer wall of the deceleration table is provided with a rubber pad, the upper surface of the rubber pad is provided with a plurality of rubber lugs.

Preferably, the front end of the guardrail upright post is provided with an anti-fog lamp shade, the anti-fog lamp shade is internally provided with an anti-fog lamp, the periphery of the anti-fog lamp shade is provided with a lamp shade frame, and the lamp shade frame is in threaded connection with the guardrail upright post through screws.

Preferably, pass through spring coupling between crashproof front bezel and the crashproof back plate, and the spring is provided with a plurality of, and is adjacent be provided with the damping rod between the spring, and the outer wall fixed connection of the one end of damping rod and crashproof back plate.

Preferably, be provided with the reflection of light furring strip on the outer wall of crashproof front bezel, the reflection of light furring strip is provided with ten, and ten reflection of light furring strips equidistance distribute with the surface of crashproof front bezel.

The invention at least comprises the following beneficial effects:

1. the invention divides the guardrail for the highway bridge into two parts of a deceleration platform and a buffer guardrail, and the deceleration platform and the buffer guardrail are internally provided with a resistance strain gauge collision sensor and an emergency air bag system respectively, when a vehicle is accidentally out of control and collides with the guardrail, the vehicle firstly collides with the deceleration platform, at the moment, a shock block of the resistance strain gauge collision sensor in the deceleration platform vibrates, so that an external buffer medium vibrates along with the shock block, the strain resistance of the resistance strain gauge is deformed, the resistance value is changed along with the shock block, after the vehicle is processed and amplified by an electric control circuit, a voltage signal is transmitted to a singlechip main control chip, the singlechip main control chip can judge the collision degree according to the strength of the voltage signal, if the preset value is exceeded, a signal is transmitted to an ignition circuit, an electric heating wire is switched on, the electric heating wire rapidly ignites the explosive by red heat, and the sodium azide is thermally decomposed by utilizing the heat generated instantly by the explosive, release a large amount of nitrogen gas, fill in foldable gasbag, make foldable gasbag rely on impact and pressure effect to break tear the seam plastic slab and pop out, cover in the guardrail front end, realize flexible buffering, reduce that the driver receives the impact, avoided current anticollision guardrail wholly to adopt the steel structure, when meeting with the unexpected striking of vehicle, the buffering effect is not good, can't slow down the problem emergence of the damage that the driver received.

2. The anticollision board through with the guardrail sets up to two parts around, and installs spring and damping rod between two-layer anticollision board, if the speed of a motor vehicle when vehicle striking guardrail is too fast, only lean on the gasbag system when can't unloading the power completely, the vehicle can continue to strike the anticollision front bezel of guardrail, and at this moment, spring and damping rod synergism between anticollision front bezel and the anticollision back plate can play the absorbing effect of physics, further reduce the impact, finally reach the effect of stopping the vehicle.

3. Through setting up the speed reduction platform, when the vehicle strikes the speed reduction platform, a plurality of rubber bumps on the speed reduction platform can increase frictional force, slow down wheel speed, have the deceleration strip and played the effect of buffering, give the more operating time of driver, have several seconds to react and make the emergence of prejudging the reduction accident, and the speed reduction platform can trigger the gasbag system in advance, avoid vehicle and gasbag too near, lead to causing the problem of secondary damage when popping out.

4. By installing the anti-fog lamp inside the guardrail upright post, when snow fog happens suddenly in winter, the terminal can send a signal to the buried control box of the guardrail through the wireless data transmission module to control the anti-fog lamp to be turned on to illuminate two sides of a bridge of a highway and remind the position of a vehicle guardrail, thereby increasing the safety of the vehicle running in a highway section in the snow fog days and avoiding accidents in the process of blocking the high speed, and the outer wall of the guardrail anti-collision front plate is provided with the light reflection strip which mainly aims at reducing the potential safety hazard of drivers at night, the range of light irradiation of the vehicles at night is small, the visual field of the drivers is easily limited, the observation capability of the objects is reduced in the daytime and visual fatigue is easily generated, and the arrangement of the light reflection strip can make the guardrails at two sides more striking so as to achieve the reminding effect, and the two safety structures cooperate, therefore, the potential safety hazard in daily driving is reduced as much as possible.

5. The highway bridge guardrail is connected with the terminal through the wireless data transmission module, data intercommunication is achieved, centralized management is facilitated, after the guardrail is impacted by vehicles, the buried control box can upload position information acquired by the GPS positioning module to the terminal through the wireless data transmission module, rescue can be dispatched timely according to a receiving site conveniently, and therefore influences caused by accidents are reduced.

Drawings

FIG. 1 is a schematic view of the overall structure of a crash barrier with a buffering function for a highway bridge according to the present invention;

FIG. 2 is a schematic side view of a crash barrier for a highway bridge according to the present invention, the crash barrier having a buffering function;

FIG. 3 is a schematic view of the internal structure of the crash barrier airbag storage box with a buffering function for a highway bridge, provided by the invention;

FIG. 4 is a schematic view of the internal structure of an inflation mechanism of a crash barrier for a highway bridge, which is provided by the invention and has a buffering function;

FIG. 5 is an enlarged schematic view of the structure of the crash barrier A with a buffering function for a highway bridge, which is provided by the invention;

fig. 6 is a schematic diagram of a crash barrier control system with a buffering function for a highway bridge according to the present invention.

Detailed Description

The present invention is described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description.

As shown in fig. 1 to 6, a crash barrier for a highway bridge having a buffering function, comprising: the guardrail comprises two guardrail upright posts 1, the upper ends of the two guardrail upright posts 1 are fixedly connected through a reinforcing cross rod 2, the reinforcing cross rod 2 can effectively enhance the connection strength of the two guardrail upright posts 1, and the condition that the two guardrail upright posts 1 are connected only by an anti-collision rear plate 14 and the strength is lower is avoided; the speed reducing table 5 is installed at the front end of the lower surface of the guardrail upright post 1, the speed reducing table 5 is connected with the guardrail upright post 1 in a welding mode, and the speed reducing table 5 can reduce the speed of a vehicle before the vehicle collides with the guardrail so as to reduce the impact on the guardrail; the four resistance strain gauge collision sensors 8 are arranged at the front end of the deceleration table 5, the four resistance strain gauge collision sensors 8 are equidistantly distributed on the deceleration table 5, four groups of the resistance strain gauge collision sensors 8 are arranged, so that collision prevention detection can be more comprehensive, collision of a vehicle at any angle can be effectively detected, and when the collision is detected, a signal is sent to the buried control box 17 to drive the emergency air bag system to be started; the anti-collision rear plate 14 is installed between the two guardrail uprights 1, and two sides of the anti-collision rear plate 14 are respectively welded with the outer walls of the two guardrail uprights 1; a front impact panel 9 provided at a front end of the rear impact panel 14; an airbag housing box 11 mounted on the upper surface of the front impact prevention plate 9, wherein three inflation mechanisms 12 are mounted on the upper surface of the airbag housing box 11, one ends of the three inflation mechanisms 12 extend into the airbag housing box 11, the airbag housing box 11 can protect the airbag from being stored at ordinary times, and the inflation mechanism 12 on the upper end of the airbag housing box is composed of an igniter 122 and a sodium azide 123 gas generator, so that nitrogen can be rapidly decomposed and filled into the airbag after ignition; bury formula control box 17, it sets up the rear end of speed reduction platform 5, just bury formula control box 17's input and mains connection, control box adopts and buries formula structure, and the security is high.

In the scheme, the highway bridge guardrail is connected with a terminal machine through a wireless data transmission module to realize data intercommunication and facilitate centralized management, when a vehicle collides against the guardrail accidentally, the vehicle firstly collides against a deceleration table at the front end of the guardrail, a plurality of rubber bumps on the deceleration table increase friction force and slow down the speed of wheels, a deceleration strip plays a role in buffering, more operation time is provided for a driver, a few seconds of reaction and prejudgment are made to reduce accidents, meanwhile, when the deceleration table is impacted, a resistance collision sensor in the deceleration table can sense impact change, if the impact is greater than a preset value, a signal is sent to a main control chip of a single chip microcomputer, the main control chip sends an instruction to an ignition circuit to switch on an electric heating wire, the electric heating wire is rapidly heated to ignite explosives, and the sodium azide is heated and decomposed by utilizing heat generated instantly by explosive explosion, release a large amount of nitrogen gas, fill in foldable gasbag, make foldable gasbag rely on impact and pressure effect break tear seam plastic slab and pop out, cover in the guardrail front end, realize the flexible buffering, reduce the damage that the driver receives, if the vehicle speed is too fast, when relying on the gasbag can't unload power completely, the vehicle can continue to strike the crashproof front bezel of guardrail, at this moment, spring and damping lever synergism between crashproof front bezel and the crashproof back plate, can play the absorbing effect of physics, further reduce and strike, finally reach the effect of stopping the vehicle, and after assaulting, bury formula control box with this guardrail connection can pass to the terminating machine on through the positional information that wireless data transmission module acquireed GPS orientation module, the rescue is conveniently dispatched.

In a preferred scheme, the electrical resistance strain gauge impact sensor 8 comprises a sensor base plate 801 and a sensing housing 802, wherein the sensing housing 802 is mounted at the front end of the sensor base plate 801, a buffer medium 804 is mounted inside the sensing housing 802, a vibration block 805 is mounted inside the buffer medium 804, an electrical resistance strain gauge 806 is mounted at the upper end of the vibration block 805, and an electrical control circuit 803 is mounted on the inner wall of the sensor base plate 801.

In the scheme, when a vehicle impacts a speed reduction table, the shock block in the impact sensor of the resistance strain gauge vibrates, the external buffer medium vibrates therewith, the strain resistance of the resistance strain gauge is deformed, the resistance value is changed therewith, after the processing and amplification of the electric control circuit, the voltage signal is transmitted to the single chip microcomputer main control chip, the main control chip can judge the impact degree according to the strength of the voltage signal, and if the impact degree exceeds a preset value, the main control chip can send a signal to the electric heating wire to ignite the inflation buffer system.

In a preferred scheme, the lower surface of the inflating mechanism 12 is provided with a mounting plate 121, the rear end of the mounting plate 121 is provided with an electric connection end 13, the front end of the mounting plate 121 is provided with an igniter 122, the inside of the igniter 122 is provided with a heating wire 25 and explosive, and the outside of the igniter 122 is provided with a sodium azide 123.

In the scheme, when the impact is detected by the impact sensor of the resistance strain gauge, a signal is sent to the main control chip of the single chip microcomputer, the main control chip sends an instruction to the ignition circuit, the heating wire is switched on to rapidly ignite the explosive by red heat, the sodium azide is heated and decomposed by utilizing the heat generated in the moment of explosive explosion, a large amount of nitrogen is released and filled into the foldable air bag, the foldable air bag breaks the tear seam by means of impact and pressure to pop out a plastic plate and covers the front end of the guardrail, flexible buffering is realized, and the impact on a driver is reduced.

In a preferable scheme, a filter layer 124 is arranged outside the sodium azide 123, an anti-static ABS isolation shell 125 is arranged outside the filter layer 124, and exhaust holes 126 are arranged on both sides of the anti-static ABS isolation shell 125.

In the above scheme, the filter layer is a metal filter screen, can filter the residue that the explosive produced after lighting, and the outer layer of some firearm chooses for use prevents static ABS isolation shell, can bear the impact that produces when a small amount of explosive explodes, can play the effect of preventing static again, avoids static accident to light the condition emergence of gasbag.

In a preferred scheme, a single chip microcomputer main control chip 22, a wireless data transmission module 23 and a GPS positioning module 24 are installed inside the buried control box 17, the output end of the single chip microcomputer main control chip 22 is electrically connected with the input end of an electric heating wire 25, the output ends of the resistance strain gauge collision sensor 8 and the GPS positioning module 24 are electrically connected with the input end of the single chip microcomputer main control chip 22, and the single chip microcomputer main control chip 22 is in two-way connection with a terminal through the wireless data transmission module 23.

In the above scheme, highway bridge guardrail passes through wireless data transmission module and is connected with the terminating machine, realizes data intercommunication, convenient centralized management, receives the vehicle impact back at the guardrail, buries formula control box and can pass to the terminating machine through the positional information that wireless data transmission module acquireed GPS orientation module, conveniently in time dispatches the rescue according to receiving the site to alleviate the influence that the accident caused.

In a preferred embodiment, a storage cavity 18 is arranged inside the airbag storage box 11, a foldable airbag bag 19 is installed inside the storage cavity 18, a tear-off plastic plate 20 is arranged on the lower surface of the airbag storage box 11, and two sides of the tear-off plastic plate 20 are connected with the airbag storage box 11 through buckles 21.

In the above scheme, the thickness of tear seam plastic slab is 0.5 millimeter, adopts simple and easy buckle to be connected with the gasbag receiver, and at ordinary times, the tear seam plastic slab can play the effect of sealed gasbag receiver, avoids inside gasbag dust adhesion to influence the result of use, and lights the gasbag at the lighter ware after, foldable gasbag can rely on impact and pressure effect to break the tear seam plastic slab fast and pop out, realizes the cushioning effect of guardrail.

In a preferred scheme, a rubber pad 6 is installed on the outer wall of the reduction table 5, a rubber bump 7 is arranged on the upper surface of the rubber pad 6, and the rubber bump 7 is provided with a plurality of rubber bumps.

In the above scheme, when the vehicle strikes the deceleration table, a plurality of rubber bumps on the deceleration table can increase frictional force, slow down wheel speed, have had the deceleration strip to play the effect of buffering, give the driver more operating time, have several seconds to react and make the emergence of prejudging reduction accident.

In an optimal scheme, fog lamp shade 3 is installed to the front end of guardrail stand 1, and fog lamp shade 3's internally mounted has the fog lamp, all be provided with lamp shade frame 4 around fog lamp shade 3, and lamp shade frame 4 passes through screw and 1 threaded connection of guardrail stand.

In the above scheme, when the unexpected snow fog in winter, terminating machine accessible wireless data transmission module sends the signal to the buried control box of guardrail, and control fog lamp opens, throws light on highway's bridge both sides, reminds the position at vehicle guardrail place, increases the security when the vehicle travel in the highway section is stayed in snow fog day, avoids taking place the accident at the high-speed in-process of blockade.

In a preferred scheme, the front anti-collision plate 9 and the rear anti-collision plate 14 are connected through springs 15, the springs 15 are provided with a plurality of springs, a damping rod 16 is arranged between the adjacent springs 15, and one end of the damping rod 16 is fixedly connected with the outer wall of the rear anti-collision plate 14.

In above-mentioned scheme, if the speed of a motor vehicle of vehicle striking guardrail is too fast, when leading to the unable complete power of unloading of air bag system, the vehicle can continue to strike the crashproof front bezel of guardrail, and at this moment, the spring and the damping lever synergism between crashproof front bezel and the crashproof back plate can play the absorbing effect of physics, further reduce the impact, finally reach the effect of stopping the vehicle.

In a preferred scheme, be provided with reflection of light welt 10 on the outer wall of crashproof front bezel 9, reflection of light welt 10 is provided with ten, and ten reflection of light welts 10 equidistance distribute with crashproof front bezel 9's surface.

In the above scheme, the reflection of light strip of pasting mainly is in order to reduce driving personnel's the potential safety hazard night, and the scope of driving vehicle light illumination night is little, and the driver's field of vision is restricted easily, and the observation ability to the thing descends to some extent daytime, produces visual fatigue easily, and the setting of reflection of light strip of pasting can make the guardrail of both sides more striking to reach the effect of reminding, so reduce the potential safety hazard of driving night as far as possible.

While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.