CN209159644U - Gas generator and Aerated safety device - Google Patents
Gas generator and Aerated safety device Download PDFInfo
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- CN209159644U CN209159644U CN201821826119.4U CN201821826119U CN209159644U CN 209159644 U CN209159644 U CN 209159644U CN 201821826119 U CN201821826119 U CN 201821826119U CN 209159644 U CN209159644 U CN 209159644U
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- gas generator
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Abstract
The utility model relates to a kind of gas generator and including the Aerated safety device of such gas generator, the gas generator includes the shell (1) and setting ventilative filter (2) in the housing for being configured to pressure vessel, the filter at least partially defines gas producing medicinal room (5), the gas producing medicinal (3) that can be ignited is accommodated in gas producing medicinal room, flow channel (6) are formed between the inner wall (11) of shell and the outside wall surface (12) of filter, the shell has exhaust port (7), the exhaust port is arranged in the wall of restriction flow channel of shell.The inner wall of the restriction flow channel of the shell has not flat structure, the not flat structure is configured to: even if the dilatancy of filter at work makes the outside wall surface of filter and the inner wall with not flat structure of shell recline, dead volume is not also generated in flow channel.The functional reliability of gas generator can be improved whereby.
Description
Technical field
The utility model relates to a kind of gas generator and a kind of Aerated safeties including such gas generator
Device, especially air bag.The Aerated safety device is especially applied in a motor vehicle.
Background technique
Air bag is used widely in a motor vehicle.Air bag mainly includes the air bag and use as inflation element
In the gas generator for generating gas.Air bag is usually foldedly snugly installed in a motor vehicle, in the emergency of motor vehicle
In, such as when colliding or will collide, gas generator is triggered, and includes the production gas in gas generator
Medicament, which is ignited and generates gas, is especially nontoxic gas, and gas is usually after filtering out residue by filter
It is filled into air bag by the exhaust port of gas generator, so that air bag is unfolded rapidly, is made to play protection to occupant
With.Air bag is usually filled within the time of several ms.
After gas producing medicinal is ignited, the gas sharply generated can make the filter of gas generator deform.
If the deflection of filter is excessive, the outside wall surface of filter is possible on the inner wall for sticking on the shell of gas generator,
So that at least one regional area and exhaust port of the flow channel between the outside wall surface of filter and the inner wall of shell
Isolation, at least one described regional area are properly termed as " dead volume ".Dead volume in flow channel not only damages filter
A part of filtering function is lost, and the gas output characteristics of gas generator is changed, influences air bag to occupant
Defencive function.Therefore gas generator is it could even be possible to explode.
It is a kind of for avoiding the measure of dead volume from being, increase between the outside wall surface of filter and the inner wall of shell
Distance, but therefore increase the size of shell and to increase the size of gas generator.With the hair of auto industry
Exhibition, gas generator miniaturization is desirable.For gas generator, size is compacter, then its safety coefficient
It is higher.The safety coefficient of gas generator can for example use relational expression: safety coefficient=shell maximum pressure-bearing/working inner pressure table
Show.When one timing of internal pressure of gas generator at work, the size of shell is compacter, it is meant that the safety system of gas generator
Number is higher.
A kind of gas generator is disclosed in patent document CN1440896A comprising filter, it on the filter can be with
Equipped with external Round Porous tubular reinforcer.On the one hand, when gas generator works, the outside wall surface of filter is pressed on the reinforcement
On the inner wall of part, this compression has an adverse effect to the filtering function of filter, and the reinforcer itself also obviously subtracts
The effective filtration area of filter is lacked.On the other hand, the reinforcer is it is possible in gas generator work and shell
Inner wall reclines, to form dead volume.
Utility model content
It include this purpose of the utility model is to provide a kind of gas generator and one kind from the prior art
The Aerated safety device of the gas generator of sample, wherein improvement while being kept substantially gas generator compact size
The functional reliability of gas generator.
The purpose is reached by a kind of gas generator, the gas generator include be configured to pressure vessel shell and
Ventilative filter in the housing is set, and the filter at least partially defines gas producing medicinal room, in gas producing medicinal room
The gas producing medicinal that can be ignited is accommodated, forms flow channel, the shell between the inner wall of shell and the outside wall surface of filter
Body has exhaust port, and the exhaust port is arranged in the wall of restriction flow channel of shell, and the restriction of the shell is flowed
The inner wall in channel is configured to not flat structure, the not flat structure: even if the dilatancy of filter at work made
The outside wall surface of filter and the inner wall with not flat structure of shell recline, and dead volume is not also generated in flow channel.
By the beneficial effect of the gas generator of the utility model, in particular, in that, in gas generator work, flowing is logical
The connection that road can keep clear with exhaust port can not substantially change the size of shell at the same time, therefore can be
The functional reliability of gas generator is improved while being kept substantially gas generator compact size.
By a kind of advantageous embodiment of the utility model, the not flat structure may include stretching from the inner wall of shell
Protrusion out and/or the recess portion from the inner wall of shell recess.Here, the not flat structure can only include protrusion, or only
Including recess portion, or not only including protrusion but also including recess portion.The protrusion is either one continuously, is windingly prolonged
Protrusion stretching, with constant altitude or change in elevation, is also possible to multiple discrete protrusions.Similarly, described recessed
Portion is also possible to either a recess portion continuous, winding in and out, with constant depth or varying depth
Multiple discrete recess portions.
By a kind of advantageous embodiment of the utility model, the protrusion is configured to the ring of multiple inner walls in shell
Ring segment on week, being separated from each other distance and/or the recess configuration at it is on the ring week of multiple inner walls in shell, that
This groove separated by a distance.
In some embodiments, each protrusion may be in approximately the same plane or in multiple and different planes；
Each protrusion can be configured to likewise, also can be configured to different；Each protrusion can be equally or disproportionately distributed；Respectively
Protrusion can regularly be distributed or randomly be distributed；It is raised that each protrusion can be configured to dotted, linear or planar.
It is described convex under the undeformed original state of filter by a kind of advantageous embodiment of the utility model
It rises and sticks on outside wall surface in the outside wall surface of filter or with filter separated by a distance.
By a kind of advantageous embodiment of the utility model, the shell can be configured to tubular, the shell packet
Include roof, bottom wall and circumferential wall.The cross section of the shell can be circular, oval or other suitable shapes.
The shell also can be configured to other shapes, such as elliposoidal.
By a kind of advantageous embodiment of the utility model, the shell can be configured to double-body bike.Preferably,
The shell includes the first shell component with bottom wall and the second shell component with roof, the first shell component
Open edge is connect with the open edge of the second shell component.
By a kind of advantageous embodiment of the utility model, the open edge of the first shell component and described the
The open edge of two housing parts is welded to connect.As an alternative, sealing thread connection or bonding are also possible.As benefit
It fills, the connection of connection and/or the force closure of form locking can also be additionally provided in.
By a kind of advantageous embodiment of the utility model, the quantity of the exhaust port is multiple, and is respectively vented
Opening is distributed setting in the circumferential wall of shell.Such as the exhaust port can be set in second shell component.Each exhaust
Opening can be homogeneously or heterogeneously distributed in the circumferential wall of second shell component.Each exhaust port can be set same
In a plane or it is arranged in different planes.Each exhaust port can be set in the identical height of shell or different high
On degree.Each exhaust port can be configured to circular hole, elliptical aperture, square hole, slit or other forms.
By a kind of advantageous embodiment of the utility model, the exhaust port is configured to for the inflation with motor vehicle
The inflation element of formula safety device connects.It can not only be applied in motor vehicle by the gas generator of the utility model, such as
For air bag, inflatable seat belt or Aerated safety vest, they collide or other similar tight in motor vehicle
It can play a protective role to occupant when anxious situation；Can also be using in other areas, such as can also apply and set travelling
It applies, in aircraft or marine vehicle.
It by a kind of advantageous embodiment of the utility model, is observed on the axial direction of shell, the exhaust port
It is arranged in the central region of shell, the height dimension of the central region is no more than the 4/5 of the height dimension of entire shell, excellent
Choosing is no more than 3/4, such as no more than 2/3,1/2 especially for the height dimension of entire shell or 1/3.In the height of central region
When spending 2/3 of the height dimension having a size of entire shell, the vertex in the axial direction of central region and shell and bottom point
Axial distance is respectively the 1/6 of the height dimension of entire shell.In the height gauge that the height dimension of central region is entire shell
When very little 1/2, the vertex in the axial direction of central region and shell and the axial distance of bottom point are respectively entire shell
The 1/4 of height dimension.
By a kind of advantageous embodiment of the utility model, the shell is configured to tubular, and the shell includes top
Wall, bottom wall and circumferential wall；The shell is configured to double-body bike, and the shell includes the first shell component and tool with bottom wall
There are the second shell component of roof, the open side at the open edge of the first shell component and the second shell component
Edge connection；The not flat structure include it is multiple it is discrete stretched out inwardly from the open edge of second shell component protrusion and/
Or inner wall stretching and with second shell component the open side of multiple discrete circumferential walls from second shell component
Edge protrusion separated by a distance and/or the not flat structure include multiple discrete circumferential walls in second shell component
The groove being arranged on inner wall.
By a kind of advantageous embodiment of the utility model, the groove is in the axial direction side of the central axis of reference shell
It upwardly extends or the groove spirally extends with reference to the central axis of shell.Other trends of groove are also feasible.
By a kind of advantageous embodiment of the utility model, the filter structure is at hollow cylindrical, the mistake
The both ends of filter are respectively supported on the inner wall of shell, and the inner wall of the filter and the inner wall of shell jointly limit
Gas producing medicinal room.It is also possible that the filter individually limits gas producing medicinal room.The filter also can have other
Shape, for example, almost spherical or it is fusoid.
By a kind of advantageous embodiment of the utility model, the gas generator may include igniter, described
Igniter is installed in the housing and is extend into gas producing medicinal room.It is also possible that hull outside to gas producing medicinal into
Row ignites.
The purpose also passes through a kind of Aerated safety device and reaches comprising inflation element and by the utility model
The air exit of gas generator, the gas generator is connect with inflation element.
By a kind of advantageous embodiment of the utility model, the Aerated safety device be can be for motor vehicle
Air bag, inflatable seat belt or Aerated safety vest.
In this respect it is to be noted that each technical characteristic in this application can be arbitrarily combined with each other, as long as this group
Conjunction is not self-contradictory.All these feasible combinations are all the technology contents that the application records.
Detailed description of the invention
The utility model is preferably explained referring to attached drawing by embodiment below.Schematical Brief Description Of Drawings are as follows:
Fig. 1 and Fig. 2 shows that gas generator at work schematical in the case where not flat structure is indulged respectively
Sectional view；
Fig. 3 shows a kind of schematical longitudinal section of the gas generator of embodiment by the utility model；
Fig. 4 shows the first shell component by the gas generator of Fig. 3 together with the diagrammatic top view of filter；
Fig. 5 shows the perspective view of the first shell component of the shell of the gas generator by Fig. 3 and Fig. 4；And
Fig. 6 and Fig. 7 shows a kind of perspective view of variant schemes of first shell component respectively.
Specific embodiment
The utility model in order to better understand is not being had not by means of Fig. 1 and Fig. 2 brief description gas generator first
Working condition in the case where flat structure.Fig. 1 and Fig. 2 shows the schematical longitudinal section of gas generator at work respectively
Figure.The gas generator includes the shell 1 and setting ventilative filter 2 in the housing for being configured to pressure vessel.The shell
Body 1 is configured to tubular, including roof, bottom wall and circumferential wall.The shell is configured to double-body bike, and the shell includes
First shell component 1a with the bottom wall and second shell component 1b with roof, the first shell component 1a's is open
Edge is airtightly connect with the open edge of the second shell component 1b.It is distributed in the circumferential wall of second shell component 1b
Multiple exhaust ports 7 are arranged in ground.Although only one exhaust port 7 be also it is feasible, it is preferred that multiple circumference in shell
Exhaust port 7 on sustained height is evenly distributedly set on wall, particularly in the circumferential wall of second shell component 1b, with
Just particularly good exhaust is realized.Exhaust port 7 can for example be connect with air bag.
As depicted in figs. 1 and 2, filter 2 can be configured to hollow cylindrical, and the both ends of the filter 2 are propped up respectively
On the roof and bottom wall of shell, the inner wall of the filter and the roof of shell and bottom wall jointly limit gas producing medicinal for support
Room 5.The gas producing medicinal 3 that can be ignited is accommodated in gas producing medicinal room 5, igniter 4 is mounted in first shell component 1a simultaneously
And it extend into gas producing medicinal room 5.Flow channel 6 is formed between the inner wall 11 of shell 1 and the outside wall surface 12 of filter 2,
Exhaust port 7 is arranged in the wall of restriction flow channel of shell 1.Gunpowder is widely used at present as gas producing medicinal, energy quilt
Igniter is lighted.It is also possible that two kinds or more kinds of components are chemically reacted when contacting with each other or mixing
And therefore generate gas, wherein these components dispose with being isolated, and are for example placed in and are in contact with each other in collision of motor-driven vehicles
Or in being mixed with each other.This multi-component gas producing medicinal should also be considered as " the production gas that can be ignited in the utility model meaning
Medicament ".
Igniter 4 is once triggered, and will ignite gas producing medicinal 3, and then gas producing medicinal can generate rapidly nontoxic nothing
Evil gas.Gas filters clean gas and is discharged to and fills via flow channel 6 and exhaust port 7 under pressure through filter 2
In the inflation element of gas formula safety device.In Fig. 1 with direction arrow schematically show gas from gas producing medicinal room 5, pass through
Filter 2 is moved towards via the air-flow that flow channel 6 and exhaust port 7 are discharged.Flow channel 6 is usually an annular space.
The gas of generation substantially radially passes through in the circumferential wall of filter 2 from gas producing medicinal room 5.Direction is only used in Fig. 1
Arrow schematically illustrates the trend of the air-flow by one of exhaust port 7.The dilatancy of filter is not retouched in Fig. 1
It states.Fig. 2 schematically describes the possible dilatancy at work of filter 2 with chain-dotted line in side.In practice, it filters
It is prominent that drum occurs usually in whole circumference for device 5.When the dilatancy of filter 2 at work is excessive, it is possible to filter 2
Outside wall surface 12 sticks on the inner wall 11 of shell 1, so that flow channel 6 is opened in lower area shown in Fig. 2 with exhaust
Mouth 7 is isolated, so that the lower area becomes dead volume, filter 5 loses filtering function in lower area.
Shell 1 can have fixing element 10, such as can be fixed in a motor vehicle by shell, or by inflation element
It is fixed on shell.Fixing element 10 for example can be flange or lug.
Fig. 3 shows that a kind of schematical longitudinal section of the gas generator of embodiment by the utility model, Fig. 4 are aobvious
Show the first shell component by the gas generator of Fig. 3 together with the diagrammatic top view of filter, and Fig. 5 is shown by Fig. 3 and Fig. 4
Gas generator shell first shell component perspective view.Other than the not flat structure for being configured to raised 8a, at it
In terms of him, it can be constituted same or likely with the gas generator by Fig. 1 and Fig. 2 by the gas generator of Fig. 3 and Fig. 4.Under
Face mainly illustrates the not flat structure for being configured to raised 8a.4 protrusion 8a are constituted on the open edge of first shell component 1a,
They are spaced each other distance in a circumferential direction and are respectively structured as ring segment.Under the undeformed original state of filter 2,
These ring segments can contact with filter 2 or have gap.In Fig. 4 as it can be seen that in gas generator work, filter 2
Dilatancy, so that filter is supported by each protrusion 8a, wherein pass through the notch 9 between adjacent protrusion 8a, entire flow channel
6 keep clear, and not will form segregate dead volume in flow channel 6.
Fig. 6 shows a kind of perspective view of variant schemes of first shell component 1a.By the first shell component of Fig. 6 and by figure
The difference of 5 first shell component is that raised 8a is on the axial direction of first shell component 1a relative to first shell portion
The open edge of part is retracted.
Fig. 7 shows the perspective view of another variant schemes of first shell component 1a.Here, flat structure is not configured to multiple
On the inner wall of the circumferential wall of housing parts 1a distribution setting, extend on the axial direction of first shell component 1a it is recessed
Portion 8b, these recess portions can be evenly distributedly arranged.
In Fig. 5 into embodiment shown in Fig. 7, flat structure does not only include protrusion or only includes recess portion.It is self-evident,
Be also by protrusion and the not flat structure that forms of recess portion it is feasible, the circumferential wall of shell can be for example arranged in they alternating with each otherly
Inner wall on.
The utility model is described in more details by specific embodiment above.Finally, it is noted that this reality
It is used only for understanding the utility model with novel above-mentioned specific embodiment, be limited without being constituted to the protection scope of the utility model
System.To those skilled in the art, modification can be made on the basis of the above embodiments, and all such modifications do not take off
From the protection scope of the utility model.
Claims (17)
1. a kind of gas generator, which includes being configured to the shell (1) of pressure vessel and being arranged in the housing
Ventilative filter (2), the filter at least partially define gas producing medicinal room (5), and accommodating in gas producing medicinal room can quilt
The gas producing medicinal (3) to ignite forms flow channel (6) between the inner wall (11) of shell and the outside wall surface (12) of filter,
The shell has exhaust port (7), and the exhaust port is arranged in the wall of restriction flow channel of shell；
It is characterized in that, the inner wall (11) of the restriction flow channel of the shell has not flat structure, the not flat structure structure
It causes: even if the dilatancy of filter (2) at work makes the outside wall surface (12) of filter with shell with not flat structure
Inner wall (11) recline, also do not generate dead volume in flow channel (6).
2. gas generator according to claim 1, which is characterized in that the not flat structure includes the inner wall from shell
The protrusion (8a) of stretching and/or the recess portion (8b) being recessed from the inner wall of shell.
3. gas generator according to claim 2, which is characterized in that the protrusion (8a) is configured to multiple in shell
Ring segment and/or the recess portion (8b) on the ring week of inner wall, to be separated from each other distance is configured to multiple inner walls in shell
Ring week on, the groove that is separated from each other distance.
4. gas generator according to claim 3, which is characterized in that each ring segment is configured to similarly and on ring week
It is uniformly distributed and/or each groove is configured to same and is uniformly distributed on ring week.
5. gas generator according to any one of claim 2 to 4, which is characterized in that in the undeformed of filter (2)
Original state under, it is described protrusion (8a) stick on the outside wall surface (12) in the outside wall surface (12) of filter or with filter every
Open distance.
6. gas generator according to any one of claim 1 to 4, which is characterized in that the shell (1) is configured to cylinder
Shape, the shell includes roof, bottom wall and circumferential wall.
7. gas generator according to claim 6, which is characterized in that the shell (1) is configured to double-body bike, described
Shell (1) includes the first shell component (1a) with bottom wall and the second shell component (1b) with roof, the first shell
The open edge of body component is connect with the open edge of the second shell component.
8. gas generator according to claim 7, which is characterized in that the open edge of the first shell component with
The open edge of the second shell component is welded to connect.
9. gas generator according to claim 6, which is characterized in that the quantity of the exhaust port (7) is multiple, and
And each exhaust port is distributed setting in the circumferential wall of shell (1).
10. according to claim 1 to gas generator described in any one of 4 and 7 to 9, which is characterized in that the exhaust port
(7) it is configured to connect for the inflation element of the Aerated safety device with motor vehicle.
11. according to claim 1 to gas generator described in any one of 4 and 7 to 9, which is characterized in that in shell (1)
It is observed on axial direction, the exhaust port (7) is arranged in the central region of shell, and the height dimension of the central region is not
More than the 2/3 of the height dimension of entire shell.
12. gas generator according to claim 1, which is characterized in that
The shell (1) is configured to tubular, and the shell includes roof, bottom wall and circumferential wall；
The shell (1) is configured to double-body bike, and the shell includes having the first shell component (1a) of bottom wall and having to push up
The second shell component (1b) of wall, the open side at the open edge of the first shell component and the second shell component
Edge connection；
The not flat structure include it is multiple it is discrete stretched out inwardly from the open edge of second shell component it is raised or multiple
Open spaced from edges that the inner wall of the circumferential wall of discrete slave second shell component stretches out and with second shell component
The protrusion of distance and/or the not flat structure include the inner wall of multiple discrete circumferential walls in second shell component
The groove of upper setting.
13. according to gas generator described in claim 3,4 or 12, which is characterized in that the groove is in reference shell
Extend on the axial direction of mandrel line or the groove spirally extends with reference to the central axis of shell.
14. according to claim 1 to gas generator described in any one of 4,7 to 9 and 12, which is characterized in that the filtering
Device (2) is configured to hollow cylindrical, and the both ends of the filter are respectively supported on the inner wall of shell, the filter
The inner wall of inner wall and shell jointly limits gas producing medicinal room (5).
15. according to claim 1 to gas generator described in any one of 4,7 to 9 and 12, which is characterized in that the gas
Generator includes igniter (4), and the igniter is installed in the housing and extend into gas producing medicinal room (5).
16. a kind of Aerated safety device comprising inflation element, which is characterized in that the Aerated safety device includes root
According to gas generator described in any one of claims 1 to 15, the air exit and inflation element of the gas generator connect
It connects.
17. Aerated safety device according to claim 16, which is characterized in that the Aerated safety device is to be used for
Air bag, inflatable seat belt or the Aerated safety vest of motor vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821826119.4U CN209159644U (en) | 2018-11-06 | 2018-11-06 | Gas generator and Aerated safety device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821826119.4U CN209159644U (en) | 2018-11-06 | 2018-11-06 | Gas generator and Aerated safety device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209159644U true CN209159644U (en) | 2019-07-26 |
Family
ID=67337006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821826119.4U Active CN209159644U (en) | 2018-11-06 | 2018-11-06 | Gas generator and Aerated safety device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209159644U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109353304A (en) * | 2018-11-06 | 2019-02-19 | 延锋汽车智能安全系统有限责任公司 | Gas generator and Aerated safety device |
| CN111071201A (en) * | 2019-12-31 | 2020-04-28 | 湖北航鹏化学动力科技有限责任公司 | Gas generator |
-
2018
- 2018-11-06 CN CN201821826119.4U patent/CN209159644U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109353304A (en) * | 2018-11-06 | 2019-02-19 | 延锋汽车智能安全系统有限责任公司 | Gas generator and Aerated safety device |
| WO2020093844A1 (en) * | 2018-11-06 | 2020-05-14 | 延锋汽车智能安全系统有限责任公司 | Gas generator and inflatable safety device |
| CN109353304B (en) * | 2018-11-06 | 2024-04-23 | 延锋汽车智能安全系统有限责任公司 | Gas generator and inflatable safety device |
| CN111071201A (en) * | 2019-12-31 | 2020-04-28 | 湖北航鹏化学动力科技有限责任公司 | Gas generator |
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