CN109664857B - Mixed gas generator for side air bag - Google Patents
Mixed gas generator for side air bag Download PDFInfo
- Publication number
- CN109664857B CN109664857B CN201811597879.7A CN201811597879A CN109664857B CN 109664857 B CN109664857 B CN 109664857B CN 201811597879 A CN201811597879 A CN 201811597879A CN 109664857 B CN109664857 B CN 109664857B
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- Prior art keywords
- cup
- gas
- chamfer
- shell
- gas generator
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- 239000007789 gas Substances 0.000 claims abstract description 65
- 239000011261 inert gas Substances 0.000 claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 239000001307 helium Substances 0.000 claims description 4
- 229910052734 helium Inorganic materials 0.000 claims description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical group [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 4
- 239000002360 explosive Substances 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 9
- 238000002485 combustion reaction Methods 0.000 abstract description 7
- 239000000843 powder Substances 0.000 abstract description 6
- 238000004880 explosion Methods 0.000 abstract description 4
- 101150038956 cup-4 gene Proteins 0.000 description 8
- 230000003139 buffering effect Effects 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000011796 hollow space material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R21/264—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic
- B60R21/2644—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous generation of gas, e.g. pyrotechnic using only solid reacting substances, e.g. pellets, powder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/2334—Expansion control features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R21/268—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous release of stored pressurised gas
- B60R21/272—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using instantaneous release of stored pressurised gas with means for increasing the pressure of the gas just before or during liberation, e.g. hybrid inflators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
- B60R2021/26058—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow using a combination of inflators
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Air Bags (AREA)
Abstract
The invention belongs to the technical field of gas generators, and particularly relates to a mixed gas generator for a side airbag, which comprises an igniter, an explosion transfer agent and a shell, wherein high-pressure mixed inert gas is sealed in the shell, the igniter is arranged in the lower end of the shell, the explosion transfer agent is arranged at the upper end of the igniter, a first flow guiding cup is arranged at the upper end of the explosion transfer agent, an opening is formed at the lower end of the first flow guiding cup, the inside of the first flow guiding cup is hollow, two upward first chamfer surfaces are arranged at the upper end of the first flow guiding cup, the two first chamfer surfaces are intersected at the top of the first flow guiding cup, and a plurality of first flow guiding holes are respectively arranged on the two first chamfer surfaces. The invention adopts the heat produced by the combustion of the booster explosive and a small amount of gas to combine with the high-pressure mixed gas to increase the air pressure in the shell, and the rupture disc is opened to inflate the air bag, so that the heat and the powder are reduced, the air inlet and outlet directions of the first guide cup and the second guide cup are staggered, the pressure of the gas is reduced in the guiding process, and the air bag is inflated rapidly and stably.
Description
Technical Field
The invention belongs to the technical field of gas generators, and particularly relates to a mixed gas generator for a side airbag.
Background
In order to improve safety, part of automobiles can protect personnel safety in the automobiles as much as possible when accidents occur, and safety airbags are arranged on the side surfaces of the automobiles and used for buffering impact force. The traditional pyrotechnic generator adopts the combustion booster explosive to generate a large amount of gas, the airbag is inflated, the gas generated after combustion has a large amount of heat, the gas directly rushes out to possibly damage the gas generator or burn out the airbag, and the combustion powder is more, so that the safety of a user is not facilitated.
The air bag's in-process air directly aerifys out the speed too fast, and heat and impact force can cause secondary injury to the user, in order to reach sufficient buffering effect, set up buffer structure in gas generator's structure, but most buffer structure is complicated for whole gas generator is bulky, is unfavorable for accomodating and installs.
Disclosure of Invention
The invention aims at solving the problems in the prior art, and provides a mixed gas generator which has simple structure, less heat and powder generation, and rapid and stable inflation and is used for a side airbag.
The aim of the invention can be achieved by the following technical scheme: the utility model provides a mixed gas generator for side gasbag, includes some firearm, booster and casing, the sealed high-pressure mixed inert gas that has in the casing, some firearm sets up in the casing lower extreme, some firearm upper end is provided with booster, booster upper end is provided with first water conservancy diversion cup, first water conservancy diversion cup lower extreme is provided with opening and inside cavity, first water conservancy diversion cup upper end is provided with two ascending first chamfer, and two first chamfer meet in first water conservancy diversion cup top, and two first chamfer are provided with a plurality of first water conservancy diversion hole respectively.
In the above-mentioned hybrid gas generator for side airbag, the inside upper end of casing is provided with the second guide cup, second guide cup upper end is provided with opening and inside cavity, second guide cup lower extreme is provided with two decurrent second chamfer, and two second chamfer meet in the bottom of second guide cup, and two second chamfer are provided with a plurality of second water conservancy diversion hole respectively.
In the above-described hybrid gas generator for a side airbag, the first chamfer and the second chamfer are disposed in a staggered manner in the housing.
In the above-mentioned hybrid gas generator for a side airbag, the upper end of the igniter is provided with a covering washer, the booster is arranged on the covering washer, and the booster is pressed between the first guide cup and the covering washer.
In the above-mentioned hybrid gas generator for a side airbag, the upper end of the housing is provided with a guide shell, and the lower end of the guide shell is mounted in the housing.
In the above-mentioned hybrid gas generator for a side airbag, the bottom of the pod is provided with a rupture disc.
In the above-described hybrid gas generator for a side airbag, the high-pressure mixed inert gas component is helium and argon.
In the above-mentioned hybrid gas generator for a side airbag, the side of the air guide sleeve is uniformly provided with a plurality of third air guide holes, and the third air guide holes are provided with double layers and staggered.
The invention adopts the heat produced by the combustion of the booster explosive and a small amount of gas to combine with the high-pressure mixed gas to increase the air pressure in the shell, and the rupture disc is opened to inflate the air bag, so that the heat and the powder are reduced, the air inlet and outlet directions of the first guide cup and the second guide cup are staggered, the pressure of the gas is reduced in the guiding process, and the air bag is inflated rapidly and stably.
Drawings
FIG. 1 is a schematic cross-sectional view of a hybrid inflator for a side airbag according to the present invention;
FIG. 2 is a schematic view showing the overall structure of a hybrid gas generator for a side airbag according to the present invention;
fig. 3 is an exploded view of a hybrid gas generator for a side airbag according to the present invention.
In the figure, an igniter 1, an explosive 2, a shell 3, a first guide cup 4, a first chamfer surface 5, a first guide hole 6, a second guide cup 7, a second chamfer surface 8, a second guide hole 9, a covering gasket 10, a guide cover 11, a rupture disc 12 and a third guide hole 13.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1, fig. 2 and fig. 3, a mixed gas generator for a side airbag comprises an igniter 1, an explosive 2 and a shell 3, wherein high-pressure mixed inert gas is sealed in the shell 3, the igniter 1 is arranged in the lower end of the shell 3, the explosive 2 is arranged at the upper end of the igniter 1, a first guide cup 4 is arranged at the upper end of the explosive 2, an opening and a hollow space are formed in the lower end of the first guide cup 4, two upward first inclined surfaces 5 are arranged at the upper end of the first guide cup 4, the two first inclined surfaces 5 are intersected at the top of the first guide cup 4, and a plurality of first guide holes 6 are respectively arranged at the two first inclined surfaces 5.
The inside of the shell 3 is of a closed structure, the igniter 1 ignites the booster 2, the booster 2 burns to generate heat and a small amount of gas, high-pressure mixed inert gas is sealed in the shell 3 in advance, original mixed compressed gas in the shell is heated and expanded, the gas is expanded at the burning position of the booster first, the expanded gas flows out of the first diversion holes 6 on the two first chamfer faces 5 respectively, the gas in the shell 3 is obliquely guided to flow, annular convection is formed, the pressure of the rapid expansion gas is buffered, the damage to the generator caused by rapid pressurization is avoided, the internal pressure is increased, the sealing structure is flushed to inflate the air bag, the booster 2 and the mixed compressed gas are matched for use, the use of the gas generating agent is reduced, the generation of heat and powder is reduced, the safety of a user is protected, and the inflating speed of the air bag is high.
Preferably, the upper end inside the shell 3 is provided with a second guide cup 7, the upper end of the second guide cup 7 is provided with an opening and is hollow inside, the lower end of the second guide cup 7 is provided with two downward second chamfer surfaces 8, the two second chamfer surfaces 8 are intersected at the bottom of the second guide cup 7, and the two second chamfer surfaces 8 are respectively provided with a plurality of second guide holes 9. In the expansion process, the gas flows upwards along the second diversion holes 9 on the two second chamfer faces 8 respectively, and the gas performs an annular flow process in the shell 3, so that the pressure of the gas which is instantaneously increased is further relieved, and the generator is protected.
It is further preferred that the first chamfer 5 and the second chamfer 8 are offset within the housing 3. After the first chamfer surface 5 and the second chamfer surface 8 are staggered, gas can be flushed out from the second diversion holes 9 after flowing, the buffering effect is good, the structure is prevented from being damaged, and the gas flows in the shell 3 and flows out along the staggered second diversion holes 9 to perform stable and rapid inflation.
Preferably, the upper end of the igniter 1 is provided with a cover gasket 10, the booster 2 is arranged on the cover gasket 10, and the booster 2 is pressed between the first guide cup 4 and the cover gasket 10. The explosive 2 is limited in position and can be quickly ignited, so that the explosive cannot scatter in the shell 3 in the combustion process, and the explosive is thoroughly combusted and is provided in a sufficient quantity.
Further preferably, the high pressure mixed inert gas component is helium and argon. Helium and argon are stable and safe, can be stably stored in the shell 3 before the gas generator is started, absorb heat expansion in the air bag inflation process, can complete safe inflation, and avoid burning or even explosion danger.
Preferably, the upper end of the housing 3 is provided with a guide shell 11 and the lower end of the guide shell 11 is mounted in the housing 3. The air guide sleeve 11 guides the air flow direction, the air is further buffered and evenly rushed into the air bag, the top end of the air guide sleeve 11 can be provided with a mounting stud for mounting the air generator, the tail end of the stud can extend into the air guide sleeve 11 for connection and positioning, the connection part is closed, the structural strength is improved, and the stud can be arranged outside the air guide sleeve 11.
Further preferably, the bottom of the pod 11 is provided with rupture discs 12. The rupture disc 12 can bear the pressure of high-pressure inert gas, so that the pressure is kept stable, when the booster explosive 2 burns, the generated gas and the high-pressure inert gas mixed pressure can exceed the bearing limit of the rupture disc 12, the rupture disc 12 is flushed by the gas, the gas is flushed out of the air guide sleeve 11, the occurrence speed is high, and the timely inflation of the air bag is ensured.
Further preferably, a plurality of third diversion holes 13 are uniformly formed in the side face of the diversion cover 11, and the third diversion holes 13 are arranged in a double-layer staggered manner. The third diversion holes 13 are arranged on the side face, the situation that the pressure is overlarge due to the fact that gas is flushed out of the top in a straight line is avoided, the third diversion holes 13 are provided with double layers, a large amount of gas can be flushed out in a short time as much as possible, and the third diversion holes 13 are staggered, so that the effect of uniform inflation is achieved.
The following describes the operation principle and flow of a hybrid gas generator for a side airbag according to the above embodiments.
When receiving the signal that needs to charge the air bag, the igniter 1 ignites the booster 2, the combustion generates heat, inert gas in the shell 3 is mixed to absorb the heat and expand, the air pressure in the shell 3 is increased, after the air pressure exceeds the bearing limit of the rupture disc 12, the rupture disc 12 is burst by the gas, the gas below the first guide cup 4 is closer to the booster 2 and is firstly expanded to flow out along the first guide hole 6, the expanded gas flows and mixes in a ring shape in the shell 3 because the second guide hole 9 is not arranged opposite to the first guide hole 6, flows along the second guide hole 9, the pressure is balanced, the gas flows in the shell 3 and plays a role of buffering the air pressure, the structure is prevented from being damaged due to the fact that the gas directly rushes, and the gas is inflated to the air bag along the third guide hole 13 on the side surface of the guide cover 11 after entering the second guide cup 7, and the inflation process is stable and rapid.
The invention has simple and compact structure, adopts the explosive 2 to burn and generate heat, the shell body is expanded after high-pressure mixed inert gas absorbs the heat, the internal air pressure is increased, the gas rushes open the rupture disc to inflate, the use of the gas generating medicine is reduced, the powder and the heat generation are less, the danger to human body can be reduced, in the inflation process, the high-pressure gas can be directly used for inflating, the gas outflow speed is high, the inflation operation can be rapidly completed, the first guide cup 4 and the second guide cup 7 are matched for use, the guide buffering is effectively carried out, the structure is not damaged, the inflation process is rapid and stable, the airbag can be inflated, and the secondary injury is avoided.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (6)
1. The mixed gas generator for the side airbag is characterized by comprising an igniter, an explosion-transfer agent and a shell, wherein high-pressure mixed inert gas is sealed in the shell, the igniter is arranged in the lower end of the shell, the upper end of the igniter is provided with the explosion-transfer agent, the upper end of the explosion-transfer agent is provided with a first guide cup, the lower end of the first guide cup is provided with an opening, the inside of the first guide cup is hollow, the upper end of the first guide cup is provided with two upward first chamfer surfaces, the two first chamfer surfaces are intersected at the top of the first guide cup, and the two first chamfer surfaces are respectively provided with a plurality of first guide holes;
the upper end inside the casing is provided with the second guide cup, second guide cup upper end is provided with opening and inside cavity, second guide cup lower extreme is provided with two decurrent second chamfer, and two second chamfer meet in the bottom of second guide cup, and two second chamfer are provided with a plurality of second water conservancy diversion hole respectively, first chamfer and second chamfer stagger the setting in the casing.
2. The hybrid gas generator for a side airbag of claim 1, wherein a cover gasket is provided at an upper end of the igniter, the booster is provided on the cover gasket, and the booster is compressed between the first baffle cup and the cover gasket.
3. A hybrid gas generator for a side airbag as set forth in claim 1, wherein the housing upper end is provided with a pod and the pod lower end is mounted within the housing.
4. A hybrid gas generator for a side airbag according to claim 3, wherein the pod bottom is provided with rupture discs.
5. A hybrid gas generator for a side airbag according to claim 1, wherein the high pressure mixed inert gas component is helium and argon.
6. A hybrid gas generator for a side airbag according to claim 3, wherein a plurality of third diversion holes are uniformly formed in the side surface of the diversion cover, and the third diversion holes are provided with double layers and are staggered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811597879.7A CN109664857B (en) | 2018-12-26 | 2018-12-26 | Mixed gas generator for side air bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811597879.7A CN109664857B (en) | 2018-12-26 | 2018-12-26 | Mixed gas generator for side air bag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109664857A CN109664857A (en) | 2019-04-23 |
| CN109664857B true CN109664857B (en) | 2023-12-15 |
Family
ID=66147308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811597879.7A Active CN109664857B (en) | 2018-12-26 | 2018-12-26 | Mixed gas generator for side air bag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109664857B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110371074B (en) * | 2019-07-01 | 2021-09-24 | 均胜汽车安全系统(湖州)有限公司 | Special combustion chamber for gas generator |
| DE102019124042A1 (en) * | 2019-09-09 | 2021-03-11 | Zf Airbag Germany Gmbh | GAS GENERATOR AND METHOD OF OPERATING A GAS GENERATOR |
| CN112658117B (en) * | 2020-12-25 | 2022-07-26 | 江苏浩峰汽车附件有限公司 | Processing technology of air guide sleeve for safety airbag |
| CN113619521B (en) * | 2021-07-30 | 2022-09-27 | 均胜汽车安全系统(湖州)有限公司 | Ceiling column-shaped mixed safety airbag gas generator |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6039348A (en) * | 1998-10-09 | 2000-03-21 | General Motors Corporation | Variable output inflator with adaptive heat sinking |
| CN1817696A (en) * | 2006-03-10 | 2006-08-16 | 中国航天科技集团公司第四研究院第四十二所 | Air generator for seat by a secondary driver |
| CN203391727U (en) * | 2013-07-10 | 2014-01-15 | 百利得(湖州)汽车安全系统有限公司 | Air generator for lateral air bag |
| CN105658485A (en) * | 2013-11-13 | 2016-06-08 | 株式会社大赛璐 | Gas generator |
| CN108290543A (en) * | 2015-10-02 | 2018-07-17 | 天合安全气囊系统有限责任公司 | Gas generator in particular for Vehicular occupant protection system, spring, air bag module and Vehicular occupant protection system for being arranged in gas generator |
| CN209938522U (en) * | 2018-12-26 | 2020-01-14 | 宁波保税区艾尔希汽车有限公司 | Hybrid gas generator for side airbag |
-
2018
- 2018-12-26 CN CN201811597879.7A patent/CN109664857B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6039348A (en) * | 1998-10-09 | 2000-03-21 | General Motors Corporation | Variable output inflator with adaptive heat sinking |
| CN1817696A (en) * | 2006-03-10 | 2006-08-16 | 中国航天科技集团公司第四研究院第四十二所 | Air generator for seat by a secondary driver |
| CN203391727U (en) * | 2013-07-10 | 2014-01-15 | 百利得(湖州)汽车安全系统有限公司 | Air generator for lateral air bag |
| CN105658485A (en) * | 2013-11-13 | 2016-06-08 | 株式会社大赛璐 | Gas generator |
| CN108290543A (en) * | 2015-10-02 | 2018-07-17 | 天合安全气囊系统有限责任公司 | Gas generator in particular for Vehicular occupant protection system, spring, air bag module and Vehicular occupant protection system for being arranged in gas generator |
| CN209938522U (en) * | 2018-12-26 | 2020-01-14 | 宁波保税区艾尔希汽车有限公司 | Hybrid gas generator for side airbag |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109664857A (en) | 2019-04-23 |
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