CN113401085A

CN113401085A - Wrapping type pedestrian safety airbag

Info

Publication number: CN113401085A
Application number: CN202110591635.3A
Authority: CN
Inventors: 韩勇; 蔡鸿瑜; 金钱钱; 叶凡; 叶赛峰
Original assignee: Xiamen University of Technology
Current assignee: Xiamen University of Technology
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-09-17

Abstract

The invention discloses a wrapping type pedestrian safety air bag which comprises a first buffering protection piece and a second buffering protection piece which are arranged on an automobile engine hood and used for protecting a collided pedestrian, wherein the first buffering protection piece and the second buffering protection piece are electrically connected with an AEB (automatic air bag) system of an automobile.

Description

Wrapping type pedestrian safety airbag

Technical Field

The invention relates to the technical field of vehicle safety, in particular to a wrapping type pedestrian safety airbag.

Background

Patent US9340178B1 uses a layer of adhesive on the front of the car and an eggshell-like covering over the adhesive, which automatically breaks in the event of an accident and firmly "sticks" to pedestrians or animals that may be injured in the accident. However, this patent is a non-reusable product, and once this protection mechanism is triggered, the covering on the front of the car needs to be reinstalled, and the vehicle otherwise cannot normally travel on the road.

Patent CN111907463A judges the collision accident through ECU and sensor, and the automobile front portion pops up the gasbag when the accident takes place to pop up the gasbag through the form of step-by-step inflation, when the speed of a motor vehicle is very fast, utilize very fast speed of a motor vehicle will be stricken the pedestrian and cramp and wind to the roof, prevent that the gasbag from sheltering from driver's sight. However, when the vehicle is stopped suddenly, the pedestrian can be thrown out in the forward direction, and the collision injury and the scratch can still be caused.

CN108995622A fixes the pedestrian who falls on the engine hood after collision on the engine hood by the pedestrian airbag and the tension belt which are ejected from the automobile fender. However, the tension of the tightening strap directly affects the position of the pedestrian, too loose may result in the pedestrian not being tightly fixed to the hood, and too tight may result in the pedestrian rolling to the fender position or even to the vicinity of the wheel, i.e. the tension of the elastic strap cannot be accurately controlled.

Existing pedestrian protection is divided into two categories: one is that the pedestrian who is collided in an accident is stuck to the front part of the automobile by using special materials covered by automobile front parts such as an engine hood, a windshield and the like, so as to avoid the injury caused by secondary collision of the pedestrian in the collision. The other type is that a pedestrian airbag outside the automobile is utilized, when a collision happens, the pedestrian airbag is ejected out from a front structure such as an engine hood, a front bumper and a fender to weaken or eliminate secondary injury suffered by a pedestrian in the collision accident, but the position of the pedestrian in the front of the automobile cannot be accurately controlled, and the pedestrian can be seriously injured.

To address the existing problems, a wrap-around pedestrian airbag is now provided.

Disclosure of Invention

It is an object of the present invention to provide a wrap-around pedestrian airbag that solves the problems set forth in the background above.

In order to achieve the purpose, the invention provides the following technical scheme:

a wrapping type pedestrian safety airbag comprises a first buffering protection piece and a second buffering protection piece which are arranged on an automobile engine hood and used for protecting a collided pedestrian, wherein the first buffering protection piece and the second buffering protection piece are electrically connected with an AEB system of an automobile;

whether collision is imminent information may be provided to the first and second cushioning guards by the AEB system;

the first buffering protection part is used for absorbing direct impact force between a vehicle and a collided pedestrian, the first buffering protection part comprises a first air bag arranged on the upper end face of an automobile engine hood, an inflating structure is arranged in the first air bag, an air bag left end cover and an air bag right end cover are respectively arranged on the left side and the right side of the first air bag, the two sides of the first air bag are also connected with a first traction piece used for enabling the first air bag to be tightly attached to the surface of the automobile engine hood, and an adhesion mechanism is arranged at the bottom of the first air bag facing the automobile engine hood;

the second buffer protection part is arranged on an automobile engine cover close to the front windshield of an automobile and used for buffering and fixing a collided person, the second buffer protection part comprises a second air bag, an inflation structure is also arranged in the second air bag, the second air bag is connected with a second traction piece used for drawing the second air bag to approach the collided person, and the surface of the second air bag is provided with an adhesion mechanism used for adhering the collided person.

As a further scheme of the invention: the adhesion mechanism on the second air bag covers the lower half part of the adhesion surface of the second air bag.

As a further scheme of the invention: the second traction piece comprises a second air bag traction wire connected with two ends of the second air bag, the other end of the second air bag traction wire extends towards the first buffering protection piece, the end part of the second air bag traction wire is wound on the winding roller, and the winding roller is connected with the output end of the winding motor.

As a further scheme of the invention: the adhesion mechanism comprises an adhesion layer arranged on the surface of the first air bag, and the surface of the adhesion layer is covered with an isolation film.

As a further scheme of the invention: the air bag left end cover and the air bag right end cover correspond to the automobile left fender and the automobile right fender respectively in position.

As a further scheme of the invention: the isolation film is made of rubber materials.

As a further scheme of the invention: the first traction piece comprises first air bag traction wires arranged at two ends of the first air bag, the first air bag traction wires are wound on the winding roller, and the winding roller is connected with the output end of the winding motor.

As a still further scheme of the invention: the winding motor is a servo motor.

As a still further scheme of the invention: the first and second bumper guards are also electrically connected to a front end trigger provided on a front end bumper of the vehicle.

Compared with the prior art, the invention has the beneficial effects that: the device consists of two outside-vehicle airbags which are successively popped up when a human-vehicle collision accident occurs, and the two airbags can protect the collision between a pedestrian and a vehicle and the collision between the head of the pedestrian and the ground in the collision process.

The shapes of all parts of the wrapping type pedestrian safety airbag are not complex, and the processing cost is low.

The parcel formula pedestrian air bag's structural design is reasonable, does not have any complicated assembly condition between each part for pedestrian air bag is whole to make things convenient for the dismouting.

The adhesion structure can effectively fix the first air bag on the engine cover of the automobile, and prevent the first air bag from sliding to the ground together with a collided pedestrian due to the action of gravity; similarly, the effect of the special adhesive material on the pedestrian contact surface of the first air bag is the same.

When air bag pull wire can make the gasbag pop out, pull first gasbag and paste to engine bonnet, because pedestrian and air bag contact the back, the stickness material at first gasbag back just can expose, and at this moment, the pull wire has pulled the gasbag to paste mutually with automobile engine bonnet. Likewise, the second balloon pull wire functions similarly to the first balloon pull wire, i.e., the pull wire pulls the second balloon to cover the struck pedestrian.

The parcel formula pedestrian air bag combines the AEB system, if the accident takes place under the unidentified condition of AEB, the front end trigger on the bumper senses the accident and takes place the back, starts AEB system emergency brake immediately.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of a second cushioning protection member according to the present invention;

fig. 3 is a schematic block diagram of the present invention.

Wherein: 1-a left fender of an automobile; 2-air bag left end cover; 3-a first balloon; 4-a first balloon pull wire; 5-airbag right end cover 6-automobile engine cover; 7-a second balloon; 8-hit pedestrian; 9-a second balloon pull wire; 10-automobile front windshield.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 3, in an embodiment of the present invention, a wrapping type pedestrian airbag includes a first buffering protection element and a second buffering protection element disposed on an automobile engine hood 6 for protecting a pedestrian 8, the first buffering protection element and the second buffering protection element are electrically connected to an AEB system of a vehicle, the AEB system measures a distance to a front vehicle or an obstacle by using a radar, and then compares the measured distance with an alarm distance and a safety distance by using a data analysis module, and performs an alarm prompt when the distance is less than the alarm distance, and the AEB system is activated to automatically brake the vehicle even if a driver does not have to step on a brake pedal when the distance is less than the safety distance, so as to protect driving for safe traveling;

the first buffer protection piece and the second buffer protection piece are also electrically connected with a front end trigger arranged on a front end bumper of the vehicle;

the first buffering protection part is used for absorbing direct impact force between a vehicle and a collided pedestrian 8, the first buffering protection part comprises a first air bag 3 arranged on the upper end face of an automobile engine hood 6, an inflating structure is arranged in the first air bag 3, an air bag left end cover 2 and an air bag right end cover 5 are respectively arranged on the left side and the right side of the first air bag 3, the air bag left end cover 2 and the air bag right end cover 5 respectively correspond to the left fender panel 1 and the right fender panel of the automobile, first traction pieces used for enabling the first air bag 3 to be tightly attached to the surface of the automobile engine hood 6 are further connected to the two sides of the first air bag 3, and an adhesion mechanism is arranged at the bottom of the first air bag 3 facing the automobile engine hood 6;

the second buffer protection piece is arranged on an automobile engine hood 6 close to an automobile front windshield 10 and used for buffering and fixing a collided person 8, the second buffer protection piece comprises a second air bag 7, an inflation structure is also arranged in the second air bag 7, the second air bag 7 is connected with a second traction piece used for drawing the collided person 8 to approach, the surface of the second air bag 7 is provided with an adhesion mechanism used for adhering the collided person 8, and the pedestrian is fixed through the adhesion mechanism, so that the collided person is prevented from sliding down the engine hood to cause the collision between the pedestrian and the ground;

it should be noted that the adhesion mechanism on the second airbag 7 covers the lower half of the adhesion surface of the second airbag 7, and the reason why the adhesion mechanism only covers the lower half is that the second airbag 7 can firmly cover the face of the collided person due to the possibility of full coverage, so that the collided person suffocates;

the second traction piece comprises a second air bag traction wire connected with two ends of the second air bag 7, the other end of the second air bag traction wire extends towards the first buffer protection piece, the end part of the second air bag traction wire is wound on the winding roller, the winding roller is connected with the output end of the winding motor, the winding roller is driven by the winding motor to rotate, and the winding roller can drive the second air bag traction wire to wind, so that the second air bag 7 extends towards the collided person 8 to be close to the collided person;

the adhesion mechanism comprises an adhesion layer arranged on the surface of the first air bag 3, an isolation film is covered on the surface of the adhesion layer, and when the first air bag 3 is inflated rapidly, the isolation film cannot stretch correspondingly and can be damaged, so that the adhesion layer can be directly contacted with the automobile engine hood 6, the first air bag 3 is fixed in position, and the first air bag 3 and the automobile engine hood 6 do not move relatively;

the first traction piece comprises first air bag traction wires 4 arranged at two ends of a first air bag 3, the first air bag traction wires are wound on a winding roller, the winding roller is connected with an output end of a winding motor, the winding roller is driven to rotate by the winding motor, and the winding roller can drive the first air bag traction wires to be wound, so that the first air bag 3 is flatly laid on the surface of an automobile engine hood 6;

the inflating structure is used for inflating a traditional safety airbag, when an automobile is collided at a high speed within a certain angle in front, the AEB system immediately detonates an electric igniter (namely an electric detonator) in the airbag package to explode, and the process generally only needs about 0.05 second. After the igniter is ignited, the solid nitrogen particles are quickly gasified, a large amount of nitrogen is gasified, the large amount of nitrogen immediately blows the air bag, and under the strong impact force, the air bag blows the cover on the steering wheel to be safely unfolded.

The working principle of the invention is as follows: the pedestrian safety airbag has the advantages that the pedestrian safety airbag is adopted due to the fact that fenders on two sides of a vehicle are poor in time, the structure is simple, the rear portion is triggered to be conveniently replaced, the reliability is high, the airbag which is ejected out firstly by the left fender or the right fender covers the engine hood and the windshield, the damage of collision caused by the airbag and the collision caused by the fact that a collided pedestrian is contacted can be reduced, and the secondary damage caused by the collided pedestrian and the ground is avoided.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof.

Claims

1. A wrap-type pedestrian airbag, characterized in that it comprises a first buffering guard and a second buffering guard that are arranged on an automobile hood (6) for protecting the pedestrian (8) being hit, said The first buffer shield and the second buffer shield are electrically connected to the vehicle AEB system, and the AEB system can provide the first buffer shield and the second buffer shield with information on whether a collision is imminent;

The first buffer guard is used for absorbing the direct impact force between the vehicle and the pedestrian (8) hit, and the first buffer guard comprises a first airbag (3) arranged on the upper end face of the hood (6) of the automobile , the first airbag (3) is provided with an inflatable inflatable structure inside, the left and right sides of the first airbag (3) are respectively provided with a left end cover (2) and a right end cover (5) of the airbag, the first airbag (3) ) both sides are also connected to the first traction member for making it close to the surface of the automobile hood (6), and an adhesion mechanism is provided at the bottom of the first airbag (3) facing the automobile hood (6);

The second buffer guard is arranged on the hood (6) of the automobile close to the front windshield (10) of the automobile, and is used for buffering and fixing the pedestrian (8) to be hit, and includes a second airbag (7), so the The second airbag (7) is also provided with an inflatable structure inside, the second airbag (7) is connected to a second traction member for pulling it toward the pedestrian (8) being hit, and the surface of the second airbag (7) is Adhesion means are provided for adhering the struck pedestrian (8).

2 . The wrapped pedestrian airbag according to claim 1 , wherein the adhesion mechanism on the second airbag ( 7 ) covers the lower half of the adhesion surface of the second air bag ( 7 ). 3 .

3. The wrapped pedestrian airbag according to claim 1, wherein the second traction member comprises a second airbag traction wire connected to both ends of the second airbag (7), and the other end of the second airbag traction wire Extending toward the first buffer guard, the end of the traction wire of the second airbag is wound on a winding roller, and the winding roller is connected with the output end of the winding motor.

4 . The wrapped pedestrian airbag according to claim 1 , wherein the adhesion mechanism comprises an adhesion layer disposed on the surface of the first airbag ( 3 ), and the surface of the adhesion layer is covered with a release film. 5 .

5 . The wrapped pedestrian airbag according to claim 4 , wherein the isolation film is made of rubber material. 6 .

6. The wrapped pedestrian airbag according to claim 1, wherein the left end cover (2) of the airbag and the right end cover (5) of the airbag are respectively in the same position with the left fender (1) and the right fender of the automobile. correspond.

7. The wrapped pedestrian airbag according to claim 1, wherein the first traction member comprises a first airbag traction wire (4) disposed at both ends of the first airbag (3), and the first airbag The traction wire is wound on the winding roller, and the winding roller is connected with the output end of the winding motor.

8 . The wrapped pedestrian airbag according to claim 3 or 7 , wherein the winding motor is a servo motor. 9 .

9 . The wrapped pedestrian airbag according to claim 1 , wherein the first buffer protection member and the second buffer protection member are also electrically connected to a front end trigger disposed on the front end bumper of the vehicle. 10 .