Air bag cold air type gas generator

Abstract

The utility model relates to the technical field of safety air bag gas generators, in particular to a safety air bag cold air type gas generator which comprises a main body, and a cold air type gas generating assembly is arranged in the main body. According to the utility model, the cold air type gas generator is adopted to directly release high-pressure gas, so that the air inflation speed of the cold air type gas generator is higher, the air bag can be completely unfolded in an extremely short time, the temperature of the generated gas is low, high temperature caused by chemical combustion is avoided, and potential injury to passengers is reduced; the high-pressure gas storage container is used for storing inert gas, the igniter can receive an electric signal and trigger gas release, the diffuser is used for rapidly releasing gas into the gas bag, and the gas generator is simple in design, convenient to assemble and low in cost, can effectively improve the inflation rate of the gas bag and is suitable for popularization and application. The device has the advantages of quick inflation, low-temperature gas, high safety and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of air bag inflator, concretely is a cold air type air bag inflator. BACKGROUND

[0002] Air bag inflator is a key component in the air bag system of a vehicle, its main function is to produce or release gas quickly when the vehicle collides, so that the air bag inflates and deploys in a very short time, providing a buffer for passengers and reducing the harm caused by the collision to passengers, air bag inflator is a specially designed device to provide high-pressure gas to the air bag in a short time, so that the air bag can inflate and deploy quickly.

[0003] Air bag inflator is the core component of the air bag system, its performance directly affects the deployment speed and effect of the air bag. If the air bag inflator fails or fails, the air bag may not work properly, thus failing to provide necessary protection for passengers, air bag inflator is a key device in the passive safety system of a vehicle. It produces or releases gas quickly, so that the air bag inflates at the moment of collision, providing a buffer protection for passengers.

[0004] Traditional pyrotechnic air bag inflator produces some solid particles and chemical by-products during combustion, which may enter the air bag and affect the normal deployment of the air bag, even cause irritation to the respiratory tract of passengers, in addition, the combustion products may contain toxic substances, which pose potential harm to human health, the solid fuel or chemical agent used in pyrotechnic air bag inflator may age or degrade during long-term storage, thus affecting its reliability at critical moments, the chemical agent of pyrotechnic air bag inflator is sensitive to environmental conditions, which may affect its performance under extreme conditions, therefore, a cold air type air bag inflator is needed to improve the above problems. UTILITY MODEL CONTENTS

[0005] To solve the problem that traditional pyrotechnic air bag inflator produces some solid particles and chemical by-products during combustion, which may enter the air bag and affect the normal deployment of the air bag, even cause irritation to the respiratory tract of passengers, in addition, the combustion products may contain toxic substances, which pose potential harm to human health, the solid fuel or chemical agent used in pyrotechnic air bag inflator may age or degrade during long-term storage, thus affecting its reliability at critical moments, the chemical agent of pyrotechnic air bag inflator is sensitive to environmental conditions, which may affect its performance under extreme conditions, the purpose of the utility model is to provide a cold air type air bag inflator to solve the problems raised in the above background technology.

[0006] In order to achieve the above object, the utility model provides the following technical scheme:

[0007] A cold gas type gas generator of air bag, including main part, the inside of main part is provided with cold gas type gas generating assembly,

[0008] The cold gas type gas generating assembly includes a gas pipe, the top of the gas pipe is fixedly connected with a igniter, the bottom of the gas pipe is fixedly connected with a diffuser, the bottom of the diffuser is fixedly connected with a connecting pipe, the bottom of the connecting pipe is fixedly connected with a connecting disc, the bottom of the connecting disc is provided with a rubber sealing ring, the connecting pipe is provided with two, the bottom of the connecting pipe is fixedly connected with a high-pressure gas storage container.

[0009] As the preferred scheme of the utility model, the connecting disc and rubber sealing ring are provided with two, the high-pressure gas storage container is filled with helium.

[0010] As the preferred scheme of the utility model, the bottom of the connecting disc is fixedly connected with a valve chamber, and the rubber sealing ring is arranged in the valve chamber.

[0011] As the preferred scheme of the utility model, the side of the valve chamber is fixedly connected with a valve plate, and the output end of the valve plate is fixedly connected with an electric control actuator.

[0012] As the preferred scheme of the utility model, the bottom of the gas pipe is fixedly connected with a plug, and the side of the high-pressure gas storage container is fixedly connected with a gas injection pipe.

[0013] As the preferred scheme of the utility model, the side of the gas pipe is fixedly connected with a connecting rod, and the side of the connecting rod is fixedly connected with an air bag control unit.

[0014] As the preferred scheme of the utility model, the main part includes a chassis, the top of the chassis is fixedly connected with a shell, and the side of the shell is provided with an air bag inflation connecting port.

[0015] As the preferred scheme of the utility model, the top of the shell is fixedly connected with a convex point, the side of the shell is fixedly connected with an additional shell, the side of the chassis is fixedly connected with a bottom shell, and the material of the chassis, the bottom shell and the additional shell is aluminum alloy.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] 1. In the utility model, the cold gas type gas generator is directly released high pressure gas, the cold gas type gas generator is faster, can make the air bag completely expand in very short time, the gas temperature is low, avoids the high temperature of chemical combustion, reduces the potential harm to the passenger, uses inert gas as the inflation source and is not affected by environmental humidity, temperature and the like, the performance is more stable, reduces the particulate matter and harmful gas emission in the combustion process, is more friendly to the passenger and the in-vehicle environment. The cold gas type gas generator is not affected by environmental humidity and temperature, and the performance is more stable.

[0018] 2. In the utility model, inert gas is stored by using the high pressure gas storage container, the igniter can receive the electric signal and trigger the gas release, and the diffuser is used for rapidly releasing the gas into the air bag. The gas generator is simple in design, convenient to assemble, low in cost, can effectively improve the inflation rate of the air bag, and has the advantages of rapid inflation, low temperature gas and high safety. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a whole structure schematic view of the utility model;

[0020] Figure 2 It is a cold gas type gas generation assembly structure schematic view of the utility model;

[0021] Figure 3 It is a high pressure gas storage container conveying assembly structure schematic view of the utility model;

[0022] Figure 4 It is an auxiliary valve assembly structure schematic view of the utility model.

[0023] In the drawing: 1, main body; 101, underframe; 102, shell; 103, convex point; 104, air bag inflation connecting port; 105, bottom shell; 106, additional shell; 2, cold gas type gas generation assembly; 201, gas conveying pipe; 202, plug; 203, connecting rod; 204, safety air bag control unit; 205, igniter; 206, diffuser; 207, connecting pipe; 208, connecting disc; 209, rubber sealing ring; 210, valve chamber; 211, electric control actuator; 212, valve plate; 213, high pressure gas storage container; 214, gas injection pipe. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the utility model will be clearly and completely described in combination with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0025] Embodiment, please refer to Figures 1-4 The utility model provides a technical scheme:

[0026] A cold gas type gas generator of air bag, including main body 1, the inside of main body 1 is provided with cold gas type gas generating assembly 2.

[0027] In this embodiment as Figure 1 、 Figure 2 、 Figure 3 And Figure 4 Indicated, cold gas type gas generating assembly 2 includes gas delivery pipe 201, the top of gas delivery pipe 201 is fixedly connected with igniter 205, the bottom of gas delivery pipe 201 is fixedly connected with diffuser 206, the bottom of diffuser 206 is fixedly connected with connecting pipe 207, the bottom of connecting pipe 207 is fixedly connected with connecting disc 208, the bottom of connecting disc 208 is provided with rubber sealing ring 209, connecting pipe 207 is provided with two, the bottom of connecting pipe 207 is fixedly connected with high-pressure gas storage container 213, cold gas type gas generator is directly released high-pressure gas, and the inflation speed of cold gas type gas generator is faster, can make air bag completely expand in very short time, the gas temperature produced is low, avoids high temperature caused by chemical combustion, reduces potential harm to passengers, uses inert gas as inflation source and is not influenced by environmental humidity, temperature and the like, and performance is more stable, reduces particulate matter and harmful gas emission in combustion process, is more friendly to passengers and in-vehicle environment. Cold gas type gas generator is not influenced by environmental humidity and temperature, and performance is more stable.

[0028] Wherein, connecting disc 208 and rubber sealing ring 209 are provided with two, high-pressure gas storage container 213 is filled with helium, the bottom of connecting disc 208 is fixedly connected with valve chamber 210, rubber sealing ring 209 is arranged in the inside of valve chamber 210, the side of valve chamber 210 is fixedly connected with valve plate 212, the output end of valve plate 212 is fixedly connected with electric control actuator 211, the bottom of gas delivery pipe 201 is fixedly connected with plug 202, the side of high-pressure gas storage container 213 is fixedly connected with gas injection pipe 214, the side of gas delivery pipe 201 is fixedly connected with connecting rod 203, the side of connecting rod 203 is fixedly connected with air bag control unit 204, inert gas is stored by high-pressure gas storage container 213, igniter 205 can receive electric signal and trigger gas release, diffuser 206 is used for rapidly releasing gas into air bag, the design of this gas generator is simple, convenient to assemble, and low in cost, can effectively improve the inflation rate of air bag, and has the advantages of rapid inflation, low-temperature gas and high safety.

[0029] In this embodiment as Figure 1As shown, the main body 1 includes a chassis 101, the top of the chassis 101 is fixedly connected with an outer shell 102, the side of the outer shell 102 is provided with an air bag inflation connecting port 104, the top of the outer shell 102 is fixedly connected with a convex point 103, the side of the outer shell 102 is fixedly connected with an additional shell 106, the side of the chassis 101 is fixedly connected with a bottom shell 105, the material of the chassis 101, the bottom shell 105 and the additional shell 106 is aluminum alloy, the chassis 101, the outer shell 102, the bottom shell 105 and the additional shell 106 made of aluminum alloy can withstand the high temperature and high pressure generated when the gas generator works, and the high-strength characteristics of this material ensure that the outer shell 102 will not deform or break under extreme conditions, thereby protecting the chemical agents and ignition devices inside.

[0030] The working process of the utility model: when the safety air bag cold gas generator designed by the scheme works, when the car collides, the safety air bag control unit 204 receives the collision signal, and sends an electric signal to the gas generating assembly, at this time, the igniter 205 in the generator is triggered, an impact wave is generated, the sealing device of the stored gas is opened, the high-pressure gas is rapidly released and filled into the air bag, compared with the traditional pyrotechnic gas generator, the cold gas generator does not involve the chemical combustion process, so the gas temperature is low, and no combustion by-products are generated. This low-temperature gas helps to reduce the risk of burns to passengers when the air bag expands.

[0031] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An airbag cold-gas inflator comprising a body (1), characterised in that: The inside of the main body (1) is provided with a cold gas type gas generating assembly (2); The cold gas type gas generating assembly (2) comprises a gas conveying pipe (201), the top of the gas conveying pipe (201) is fixedly connected with an igniter (205), the bottom of the gas conveying pipe (201) is fixedly connected with a diffuser (206), the bottom of the diffuser (206) is fixedly connected with a connecting pipe (207), the bottom of the connecting pipe (207) is fixedly connected with a connecting disc (208), the bottom of the connecting disc (208) is provided with a rubber sealing ring (209), the connecting pipe (207) is provided with two, the bottom of the connecting pipe (207) is fixedly connected with a high-pressure gas storage container (213).

2. An airbag cold-gas inflator according to claim 1, wherein The connecting disc (208) and the rubber sealing ring (209) are provided with two, the high-pressure gas storage container (213) is filled with helium inside.

3. The inflator according to claim 1, wherein The bottom of the connecting disc (208) is fixedly connected with a valve house (210), and the rubber sealing ring (209) is arranged in the valve house (210).

4. An airbag cold-gas inflator according to claim 3, wherein The side of the valve house (210) is fixedly connected with a valve plate (212), and the output end of the valve plate (212) is fixedly connected with an electric control executor (211).

5. The inflator according to claim 1, wherein The bottom of the gas conveying pipe (201) is fixedly connected with a plug (202), and the side of the high-pressure gas storage container (213) is fixedly connected with a gas injection pipe (214).

6. The inflator according to claim 1, wherein The side of the gas conveying pipe (201) is fixedly connected with a connecting rod (203), and the side of the connecting rod (203) is fixedly connected with a safety air bag control unit (204).

7. The inflator according to claim 1, wherein The main body (1) comprises a chassis (101), the top of the chassis (101) is fixedly connected with an outer shell (102), and the side of the outer shell (102) is provided with an air bag inflation connecting port (104).

8. An airbag cold-gas inflator according to claim 7, wherein The top of the outer shell (102) is fixedly connected with a convex point (103), the side of the outer shell (102) is fixedly connected with an additional shell (106), the side of the chassis (101) is fixedly connected with a bottom shell (105), and the materials of the chassis (101), the bottom shell (105) and the additional shell (106) are aluminum alloy.

Images