CN111231885A - Gas collection assembly and airbag device - Google Patents

Gas collection assembly and airbag device Download PDF

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Publication number
CN111231885A
CN111231885A CN202010240612.3A CN202010240612A CN111231885A CN 111231885 A CN111231885 A CN 111231885A CN 202010240612 A CN202010240612 A CN 202010240612A CN 111231885 A CN111231885 A CN 111231885A
Authority
CN
China
Prior art keywords
gas
vent
gas collection
bag
collection assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010240612.3A
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Chinese (zh)
Inventor
张海龙
庄晓
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Junsheng Automobile Safety System Anhui Co ltd
Original Assignee
Shanghai Lingang Junsheng Automobile Safety System Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Lingang Junsheng Automobile Safety System Co Ltd filed Critical Shanghai Lingang Junsheng Automobile Safety System Co Ltd
Priority to CN202010240612.3A priority Critical patent/CN111231885A/en
Publication of CN111231885A publication Critical patent/CN111231885A/en
Pending legal-status Critical Current

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    • 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
    • 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
    • B60R21/276—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 with means to vent the inflation fluid source, e.g. in case of overpressure
    • 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
    • B60R2021/26076—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 characterised by casing

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

The invention provides a gas collection assembly and an air bag device, which can adjust the output difference of a gas generator under different temperature working conditions so as to reduce the failure risk of an air bag. The invention provides a gas collecting component for an air bag device, which is used for installing an air bag and comprises: the gas collecting box is provided with a containing cavity for mounting the gas bag, and the side plate is provided with a vent hole for adjusting the internal pressure of the containing cavity; and the exhaust hole adjusting piece is arranged near the exhaust hole and used for adjusting the size of the exhaust hole according to the temperature.

Description

Gas collection assembly and airbag device
Technical Field
The invention relates to the technical field of passive safety of automobiles, in particular to a gas collection assembly and an air bag safety device.
Background
The gas generator in the airbag apparatus may generate gas by a gas generant having a great difference in combustion speed and combustion efficiency in high and low temperature environments. In the case of an airbag pyrotechnic gas generator using a pure gas generant, the peak pressure at high temperature is approximately 415Kpa, while the peak pressure at low temperature is only 350Kpa, with the peak pressure at high and low temperatures differing by approximately 65Kpa (as shown in fig. 1). The consequence of such a large pressure peak difference is that the airbag of the airbag device is obviously already under-inflated when it is statically deployed at low temperature; when the airbag is statically unfolded at high temperature, the airbag is over full, and the integrity of the airbag often becomes problematic.
In order to solve the problem, the integrity of the air bag which can be filled by a gas generator (for example, the peak pressure of 350Kpa in 60L Tank) at low temperature is ensured not to be damaged at high temperature (the peak pressure of 415Kpa in 60L Tank), and the design margin of the air bag can be increased by increasing the strength of the fabric of the air bag and the using amount and the strength of the ribbon when the main sheet fabric and the side sheet fabric are sewn, but the design and manufacturing cost of the whole air bag is increased to a certain extent, and the manufacturing difficulty is increased. In addition, to ensure the saturation of the airbag at low temperatures, the overall volume of the airbag has to be reduced, and a gas generator with a lower peak output pressure is used, which also sacrifices the occupant protection capability and the protection range of the airbag.
Disclosure of Invention
Therefore, in order to overcome the defects of the prior art, the invention provides a gas collecting assembly and an airbag device, wherein the gas collecting assembly and the airbag device can adjust the output difference of a gas generator under different temperature working conditions so as to reduce the failure risk of an airbag.
In order to achieve the above object, the present invention provides a gas collecting assembly for an airbag device for mounting a gas bag, comprising: the gas collecting box is provided with a containing cavity for mounting the gas bag, and the side plate is provided with a vent hole for adjusting the internal pressure of the containing cavity; and the exhaust hole adjusting piece is arranged near the exhaust hole and used for adjusting the size of the exhaust hole according to the ambient temperature.
In one embodiment, the periphery of the vent hole is provided with a clamping groove, and the vent hole adjusting piece is inserted into the clamping groove in a sliding mode.
In one embodiment, the vent adjustment member has a shape that conforms to the shape of the vent and the expansion coefficient of the vapor collection box is greater than the expansion coefficient of the vent adjustment member.
In one embodiment, the vent tab is sized to be equal to the vent size at-40 ℃.
In one embodiment, the gas collection box is a nylon gas collection box, and the vent hole adjusting piece is a metal adjusting sheet.
In one embodiment, the vent adjustment member is a sealed bag containing a liquid, and the vent adjustment member completely covers the vent when the liquid is in a liquid state.
In one embodiment, the size of the sealed pouch is 30% to 40% larger than the size of the vent hole.
In one embodiment, the sealed bag is a nylon bag and the liquid is deionized water.
In one embodiment, the shape of the exhaust hole is any one of square, rectangle, circle and ellipse.
The present invention also provides an airbag device characterized by comprising: a gas collection assembly; the air bag is accommodated in the air collecting assembly in a folding mode and breaks through the air collecting assembly after being inflated and expanded; and the gas generator is fixedly arranged at the bottom of the gas collection assembly and positioned in the gas bag and used for inflating the gas bag, wherein the gas collection assembly is the gas collection assembly.
Compared with the prior art, the invention has the advantages that: the sizes of the exhaust holes are adjusted according to the temperature through the exhaust holes in the gas collecting box and the exhaust hole adjusting piece, so that the safety airbag is inflated in a self-adaptive mode under the working conditions of different temperatures and unchanged in the gas generator, and the failure risk of the safety airbag is reduced.
Drawings
FIG. 1 is a comparison of outputs of a 60L Tank gas generator in the prior art under low-temperature, normal-temperature and high-temperature conditions;
FIG. 2 is a schematic structural view of a gas collection assembly in a cryogenic state in accordance with an embodiment of the present invention; and
FIG. 3 is a schematic structural view of a gas collection assembly in a high temperature state according to an embodiment of the present invention; and
fig. 4 is a schematic structural view of a gas collecting assembly in a low temperature state according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
The present embodiment provides an airbag apparatus including a gas collection assembly 100, a gas bag (not shown in the drawings), and a gas generator 200.
The gas collection assembly 100 is used to connect a gas generator to an air bag and has two main functions: the gas generator can be connected with the gas bag to play a transition role; the flow velocity of high-temperature gas generated by the gas generator is weakened, the temperature is reduced, and the integrity of the gas bag is further protected. As shown in fig. 2 and 3, the gas collection assembly 100 includes a gas collection box 10 and a vent adjustment member 20.
As shown in fig. 2, the gas collecting box 10 is used for connecting the gas generator 200 with the gas bag, and has a receiving chamber for mounting the gas bag. The gas collecting box 10 may be a rectangular box body with an open top, which is enclosed by a bottom plate, a front side plate, a rear side plate, a left side plate and a right side plate.
The side plate is provided with an exhaust hole 11 for adjusting the internal pressure of the accommodating cavity. The exhaust holes 11 may be any one of square, rectangular, circular and oval. The area of preceding curb plate and posterior lateral plate is greater than the area of left side board and right side board, and exhaust hole 11 sets up on preceding curb plate and posterior lateral plate.
The outer sides of the front side plate and the rear side plate of the gas collecting box 10 are provided with clamping grooves 12 along the periphery of the exhaust holes 11. In this embodiment, the vent hole is rectangular, the locking groove 12 is disposed on the periphery of any three sides of the vent hole, an opening is formed on the side without the locking groove, and the vent hole adjusting member can be slidably inserted into the locking groove 12 through the opening and completely covers the vent hole. The size of the vent holes 11 will vary with the output of the gas generator but will typically be 30mm by 50mm, up to 50mm by 80mm and down to 10mm by 15 mm. In this embodiment, the vent hole may have an elliptical configuration.
The shape of the exhaust hole adjusting piece 20 is consistent with that of the exhaust hole 11, and the exhaust hole adjusting piece 20 is inserted into the clamping groove 12, so that the size of the exhaust hole can be adjusted according to the temperature. In this embodiment, the expansion coefficient of the gas collecting box 10 is greater than that of the exhaust hole adjusting member 20, and the size of the exhaust hole adjusting member 20 is set to be equal to that of the exhaust hole at-40 ℃. In one embodiment, vent adjustment member 20 is a metal adjustment tab. The metal adjusting sheet can be a copper adjusting sheet, an iron adjusting sheet or an aluminum adjusting sheet; the gas collecting box 10 can be a nylon gas collecting box or a metal gas collecting box. The nylon gas collecting box can be nylon-6T, nylon-9T, nylon-12 and the like. When the gas collecting box 10 is a metal gas collecting box and the exhaust hole adjusting part 20 is a metal adjusting sheet, the gas collecting box 10 may be a zinc gas collecting box, and the air hole adjusting part 20 may be a copper adjusting sheet.
In the embodiment, under a low-temperature environment, for example, at minus 40 ℃, the adjusting sheet just completely and exactly shields the exhaust holes on the side plate of the gas collecting box; when the temperature is higher than minus 40 ℃, the expansion coefficient of the metal adjusting sheet is smaller than that of the gas collecting box body, so that the expansion size of the adjusting sheet is smaller than that of the exhaust holes on the gas collecting device body, as shown in fig. 2, the adjusting sheet only shields part of the exhaust holes, and the inside of the gas collecting box is communicated with the outside of the gas collecting box through the exhaust holes of the side plate.
The air bag is accommodated in a closed cavity of the gas collecting assembly 100 in a folding manner, and the air bag breaks through the gas collecting assembly after inflation. The air bag can be formed by sewing two air bag cut pieces through two opposite sides to form a closed shape, two ends of the sewn air bag are folded inwards to form an I-shaped cross section, and the folded air bag is placed into the air collecting box 10.
The gas generator is fixedly arranged at the bottom of the gas collection assembly and is positioned in the air bag and used for inflating the air bag.
When the safety airbag device is in a low-temperature environment, such as-40 ℃, the adjusting sheet just completely and just shields the exhaust holes on the side plate of the gas collecting box, the exhaust structure is just completely closed, and after the safety airbag device is ignited, all gas generated by the gas generator can be transmitted to the gas bag after being refracted and cooled by the side plate of the gas collecting box; when the safety airbag is in a high-temperature environment, for example, 0 ℃, the exhaust structure is partially opened, and after the safety airbag is exploded, part of gas generated by the gas generator can be released out of the airbag through the openings of the exhaust structure, so that the defects that the gas generator generates gas quickly and generates more gas at high temperature are overcome, the total amount of effective gas entering the airbag is close to that at normal temperature and low temperature, and the stability and reliability of the safety airbag are guaranteed under different temperature working conditions.
Under the working conditions of low temperature, normal temperature and high temperature, the internal pressure of the air bag adopting the air collecting assembly is respectively 35Kpa, 36Kpa and 36Kpa when the air bag is statically unfolded; the internal pressures of the air bags of the air bag device without the air collecting assembly are 35Kpa, 42Kpa and 46Kpa respectively under the three temperature working conditions. Thus reducing the risk of airbag failure.
In above-mentioned air bag device and gas collecting assembly, through exhaust hole and the exhaust hole adjusting part on the gas collection box according to the size in temperature adjustment exhaust hole to the realization is unchangeable and self-adaptation is aerifyd to air bag under different temperature operating modes at gas generator, thereby reduces air bag inefficacy risk.
In another embodiment, as shown in fig. 4, the vent adjustment member 20 may be a sealed bag containing a liquid, wherein the liquid is in a liquid state and the sealed bag completely covers the vent. In this embodiment, the exhaust holes 11 are square exhaust holes, and the size of the exhaust holes may be 10mm by 10 mm. The size of the vent holes can be adjusted according to the output pressure value of the gas generator, but the maximum size does not exceed 40mm by 40mm, so that uneven stress on the vent hole adjusting piece 20 is avoided. In the case of other shapes of the vent holes, it is preferable that the total area of the vent holes is equivalent to the above-described square vent holes. The liquid in the sealed bag may be a liquid that is easily vaporized. In one embodiment, the liquid in the sealed bag is deionized water and the bag is made of nylon. The size of the sealing bag is 30-40% larger than that of the vent hole. In one embodiment, the exhaust openings are generally distributed on the front and rear end faces of the gas collecting box, which are larger in area, and are preferably located at the central positions of the two end faces, up and down and left and right. Can respectively set up 1 ~ 4 exhaust holes in two curb plates in front and back, therefore two symmetrical curb plates set up 2 ~ 8 exhaust holes in total.
The vent hole adjusting piece can be a water bag which is made of nylon material and sealed after being filled with deionized water. The water bag has the same shape as the vent hole, has flat thickness, and can cover the vent hole 11 through a clamping groove 12 arranged on the side surface of the vent hole. The clamping groove 12 is arranged at the periphery of any three sides of the exhaust hole, an opening is formed at one side without the clamping groove, the water bag can be frozen in advance, and is inserted into the clamping groove 12 in a sliding way through the opening and completely covers the exhaust hole, and the overall size of the plane of the air bag is 30-40% larger than that of the exhaust hole. In one embodiment, the sealing bag may have a water bag body and a rim portion disposed around the water bag body and engaged with the engaging groove. The sealed bag restricts the deformation of the water bag by the edge portion. The edge part and the water bag body can be made of nylon materials, but the elastic deformation amount of the edge part is smaller than that of the water bag body. In another embodiment, the clamping groove further comprises a positioning clamp for fixing the shape of the sealing bag, and at normal temperature, the positioning clamp can ensure that the sealing bag completely covers the vent hole.
In the embodiment, the characteristic that the water bag is solid due to icing when the deionized water is at a low temperature below zero centigrade can be utilized, and the exhaust port can be blocked; at high temperature, the water bag is liquid, under the action of the high-temperature high-pressure gas of the gas generator, the air bag is instantly torn, the deionized water in the water bag is released after being gasified, and the air leakage channel is opened, so that the aim of discharging redundant high-pressure gas generated by the gas generator under the high-temperature condition is fulfilled.
In above-mentioned air bag device and collection gas subassembly, through the characteristic that the water bag is the solid because of freezing to realize unchangeably and self-adaptation aerifing the air bag under different temperature operating mode at gas generator, thereby reduce air bag inefficacy risk.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention. The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A gas collection assembly for an airbag assembly for mounting a gas bag, comprising:
the gas collecting box is provided with a containing cavity for mounting the gas bag, and the side plate is provided with a vent hole for adjusting the internal pressure of the containing cavity; and
and the exhaust hole adjusting piece is arranged near the exhaust hole and used for adjusting the size of the exhaust hole according to the ambient temperature.
2. The gas collection assembly of claim 1, wherein the vent has a slot around the periphery thereof, and the vent adjustment member is slidably inserted into the slot.
3. The gas collection assembly of claim 2, wherein the vent adjustment member has a shape that conforms to the vent shape, and the gas collection box has a coefficient of expansion that is greater than the coefficient of expansion of the vent adjustment member.
4. A gas collecting device according to claim 3, characterized in that the size of the vent adjustment sheet is equal to the size of the vent at-40 ℃.
5. The gas collection assembly of claims 1-4, wherein the gas collection box is a nylon gas collection box and the vent adjustment member is a metal adjustment tab.
6. The gas collection assembly of claim 2, wherein the vent adjustment member is a sealed bag containing a liquid that, in a liquid state, completely covers the vent.
7. The gas collection assembly of claim 6, wherein the sealed bag has a size that is 30% to 40% larger than the size of the vent.
8. The gas collection assembly of claims 6-7, wherein the sealed bag is a nylon bag and the liquid is deionized water.
9. The gas collection assembly of claims 1-4, 6-7, wherein the vent is any one of square, rectangular, circular, and oval in shape.
10. An airbag device, characterized by comprising:
a gas collection assembly;
the air bag is accommodated in the air collecting assembly in a folding mode and breaks through the air collecting assembly after being inflated and expanded; and
the gas generator is fixedly arranged at the bottom of the gas collection assembly, is positioned in the gas bag and is used for inflating the gas bag,
wherein, the gas collection assembly is the gas collection assembly of any one of claims 1-9.
CN202010240612.3A 2020-03-31 2020-03-31 Gas collection assembly and airbag device Pending CN111231885A (en)

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Application Number Priority Date Filing Date Title
CN202010240612.3A CN111231885A (en) 2020-03-31 2020-03-31 Gas collection assembly and airbag device

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Application Number Priority Date Filing Date Title
CN202010240612.3A CN111231885A (en) 2020-03-31 2020-03-31 Gas collection assembly and airbag device

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5003887A (en) * 1988-12-15 1991-04-02 Bayern-Chemie Gesellschaft Fuer Flugchemische Antriebe Mbh Gas generator for inflating an inflatable article
US5388860A (en) * 1991-10-10 1995-02-14 Dynamit Nobel Aktiengesellschaft Safety device for protecting the passenger of a motor vehicle from injury in a collision
US5433476A (en) * 1994-07-27 1995-07-18 Breed Automotive Technology, Inc. Temperature compensated stored gas inflator
US6039346A (en) * 1997-01-17 2000-03-21 General Motors Corporation Air bag module with variable inflation
US20030209894A1 (en) * 2002-05-10 2003-11-13 Larsen Alan R. Airbag inflator with adaptive flow orifice
CN1899893A (en) * 2005-07-20 2007-01-24 全兴创新科技股份有限公司 Inflator for car safety air bag
KR20080027425A (en) * 2006-09-22 2008-03-27 현대모비스 주식회사 Absorbing apparatus mounting cowl cross bar
CN107206958A (en) * 2015-01-30 2017-09-26 奥托里夫Asp股份有限公司 The airbag module assemblies of in-car transverse direction gas diffusion
CN212353908U (en) * 2020-03-31 2021-01-15 上海临港均胜汽车安全***有限公司 Gas collection assembly and airbag device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5003887A (en) * 1988-12-15 1991-04-02 Bayern-Chemie Gesellschaft Fuer Flugchemische Antriebe Mbh Gas generator for inflating an inflatable article
US5388860A (en) * 1991-10-10 1995-02-14 Dynamit Nobel Aktiengesellschaft Safety device for protecting the passenger of a motor vehicle from injury in a collision
US5433476A (en) * 1994-07-27 1995-07-18 Breed Automotive Technology, Inc. Temperature compensated stored gas inflator
US6039346A (en) * 1997-01-17 2000-03-21 General Motors Corporation Air bag module with variable inflation
US20030209894A1 (en) * 2002-05-10 2003-11-13 Larsen Alan R. Airbag inflator with adaptive flow orifice
CN1899893A (en) * 2005-07-20 2007-01-24 全兴创新科技股份有限公司 Inflator for car safety air bag
KR20080027425A (en) * 2006-09-22 2008-03-27 현대모비스 주식회사 Absorbing apparatus mounting cowl cross bar
CN107206958A (en) * 2015-01-30 2017-09-26 奥托里夫Asp股份有限公司 The airbag module assemblies of in-car transverse direction gas diffusion
CN212353908U (en) * 2020-03-31 2021-01-15 上海临港均胜汽车安全***有限公司 Gas collection assembly and airbag device

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Effective date of registration: 20240527

Address after: No. 28 Chuangxin Avenue, Economic Development Zone, Feixi County, Hefei City, Anhui Province, 231299

Applicant after: Junsheng Automobile Safety System (Anhui) Co.,Ltd.

Country or region after: China

Address before: 200120 Building 8, 88 Shengrong Road, Pudong New Area, Shanghai

Applicant before: Shanghai Lingang Junsheng automobile safety system Co.,Ltd.

Country or region before: China

TA01 Transfer of patent application right