CN202243333U - Gas generator for seat belt pre-tensioner - Google Patents
Gas generator for seat belt pre-tensioner Download PDFInfo
- Publication number
- CN202243333U CN202243333U CN2011203808534U CN201120380853U CN202243333U CN 202243333 U CN202243333 U CN 202243333U CN 2011203808534 U CN2011203808534 U CN 2011203808534U CN 201120380853 U CN201120380853 U CN 201120380853U CN 202243333 U CN202243333 U CN 202243333U
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- CN
- China
- Prior art keywords
- base
- gas generator
- shell
- safety belt
- belt pretensioner
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- 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.)
- Expired - Lifetime
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- Automotive Seat Belt Assembly (AREA)
Abstract
The utility model discloses a gas generator for a seat belt pre-tensioner. The gas generator comprises a base and a tube shell connected with the base, wherein an electric ignition tube is fixedly arranged in the center of one side of the base positioned in the tube shell; a short circuit component and a second O-shaped rubber sealing ring are arranged between the base and the electric ignition tube; a nitrocotton gas generation medicine is filled in the tube shell; and a first O-shaped rubber sealing ring is additionally arranged between the tube shell and the base. The gas generator has a simple structure and is high in manufacturability, low in cost, wide in material source, high in anti-interference performance, environment-friendly, and easily subjected to automatic production management.
Description
Technical field
The utility model belongs to vehicle safety guard technology field, relates to a kind of be fit to be used for the exciting safe apparatus such as pretensioner of automobile safety belt, particularly a kind of safety belt pretensioner that is applicable to the rack-and-pinion drive mechanism.
Background technology
Safety belt pretensioner is considered to protect one of safety device that automobile passenger avoids colliding when meeting with auto against.This type safety strap is equipped with micro gas generator, the high temperature and high pressure gas that it is produced by gas generator when bumping and exciting, and tighten up safety strap slightly and protect the user to avoid collision.In recent years, along with the develop rapidly of auto trade, the renewal of constantly upgrading of the drive mechanism of safety belt pretensioner develops into different structures such as spring type, ball type, piston type, rack-and-pinion.Required its in-service time of propulsion source and the function size of the safety strap of different structure is different.The applicant discloses a kind of gas generator in the Chinese patent (CN200320109757.1) of application in 2003; It comprises; One base and one and base bonded assembly shell; In the lower central of base, also be installed with a safety air bag and use squib, base and safety air bag are with being provided with short-circuited conducting sleeve between the squib and from collar and O type rubber ring thereof; Ignition powder and gas producing medicinal are housed in the shell.This gas generator design weak point is: the gluing sealing is adopted in the sealing between shell and the base, and sealing property is slightly poor, and is unfavorable for the batch manufacturing and the operation of automation.In the 60ml leakproof tank, doing P-t curve survey performance figure is that point of ignition is not more than 5ms; Time to peak 10ms～20ms; Peak pressure 15MPa～25MPa, delivery pressure is excessive, when in the safety belt pretensioner of rack-and-pinion drive mechanism, using; Can cause belt system to damage, can't play a protective role.
Summary of the invention
The purpose of the utility model is, provides a kind of simple in structure, good manufacturability, and cost is low, and material source is wide, electrostatic prevention, disturbance rejection and be applicable to the gas generator of the safety belt pretensioner of rack-and-pinion drive mechanism.
In order to realize above-mentioned task, the utility model is taked following technical solution:
A kind of gas generator of safety belt pretensioner comprises: a base and one and base bonded assembly shell; It is characterized in that,, fixedly mount a squib, be provided with short-circuit component and the 2nd O shape rubber seal between base and the squib in the central authorities of the base that is positioned at shell one side; Nitrocotton class gas generant composition in accordance is housed in the shell, sets up an O shape rubber seal between shell and the base.
Some other characteristics of the utility model are that said squib comprises glass sintering electrode plug, metal bridge silk, igniter, Can and plastic insulation shell.
Only adorn nitrocotton class gas generant composition in accordance in the said shell, its explosive load is 0.5g～2.0g.
The gas generator of the safety belt pretensioner of the utility model, product structure is simple, good manufacturability, cost is low, and material source is extensive, electrostatic prevention, obstacle overcome ability height.Non-environmental-pollution is easy to automated production management.
Description of drawings
Fig. 1 is the structure cutaway view of the utility model;
Fig. 2 is the P-t diagram of curves of the utility model in the 10ml closed bomb vessel.
Fig. 3 is the static function curve figure of the utility model in rack-and-pinion drive mechanism safety belt pretensioner.
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed description.
The specific embodiment
With reference to Fig. 1, present embodiment provides a kind of gas generator of safety belt pretensioner, comprising: a base 2 and one and base 2 bonded assembly shells 5; In the central authorities of the base that is positioned at shell 52 one sides, fixedly mount a squib 6, be provided with short-circuit component 1 and the 2nd O shape rubber seal 4 between base 2 and the squib 6; Nitrocotton class gas generant composition in accordance 7 is housed in the shell 5, sets up an O shape rubber seal 3 between shell 5 and the base 2.
In actual mechanical process, base 2 adopts an O shape rubber seal 2 sealing backs to be connected for tight mouthful with shell 5.
All seal points all adopt the sealing of O shape rubber seal, and are simple to operation, effectively avoided traditional japanning, gluing sealing to have environmental pollution, are difficult to realize the drawback of automation.
Only adorn nitrocotton class gas generant composition in accordance 7 in the shell 2, its explosive load is 0.5g～2.0g.
Reduction processing is adopted in the end of shell 2, and the high temperature, the high pressure gas that produce in the gas generator igniting like this can break through this weakness fast, make high temperature, high pressure gas can only concentrate on a direction.Prevented effectively that simultaneously fragment is to dispersing because of gas generator igniting shell 2 when disrumpent feelings everywhere.
The gas generator of the safety belt pretensioner that present embodiment is processed, its concrete parameter is following:
1, interface size
Product height overall: H=31.3mm ± 0.55mm
Product diameter: base 2 external diameter (Φ
1)=16.9 ± 0.1mm; Shell 5 external diameter (Φ
2)=13.7 ± 0.1mm;
2, electrical property
2.1 resistance when using: 2.15 Ω ± 0.35 Ω.
2.2 insulation resistance when using: 100M Ω/500V, 2s.
2.3 all fire electric current: 0.8A/2ms.
2.4 combustion miss electric current: 0.2A/10s.
3, functional characteristics
3.1 the ambient temperature of using-35 ℃～+ 85 ℃.
3.2 when in the 10ml leakproof tank, doing the test of P-t curve (Fig. 2), point of ignition is not more than 2ms, time to peak 8ms～14ms, peak pressure 65MPa～85MPa.
Static function curve in rack-and-pinion drive mechanism safety belt pretensioner is as shown in Figure 3.
4, product structure feature
Product structure is simple, good manufacturability, and cost is low, and material source is wide, and electrostatic prevention, antijamming capability are strong.Only adorn a kind of gas generant composition in accordance in the shell, easy to operate, easy-to-use control explosive load.
5, storage, operating needs
5.1 product is applicable to the safety belt pretensioner of rack-and-pinion drive mechanism.
5.2 must measure bridge resistance, before the dress product is joined in 2.15 Ω ± 0.35 Ω scope.
It is 5.3 product must not leak electricity in safety belt pretensioner, in case unexpected.
5.4 product in safety belt pretensioner, is noted waterproof.
5.5 product should leave drying, ventilation, the flames of anger, no heat supply in, do not have leak, in the storehouse of non-corrosiveness material.
5.6 product in handling process, should be handled with care.
5.7 product box packing stacking must be firm neat, stacking height should be not more than 1.5m, and the distance of packing chest and wall and buttress spacing should be greater than 0.6m, and the operation path width should be not less than 1.5m.
Claims (3)
1. the gas generator of a safety belt pretensioner comprises: a base (2) and one and base (2) bonded assembly shell (5); It is characterized in that,, fixedly mount a squib (6), be provided with short-circuit component (1) and the 2nd O shape rubber seal (4) between base (2) and the squib (6) in the central authorities of base (2) one sides that are positioned at shell (5); Nitrocotton class gas generant composition in accordance (7) is housed in the shell (5), is provided with an O shape rubber seal (3) between shell (5) and the base (2).
2. the gas generator of safety belt pretensioner according to claim 1 is characterized in that described squib (6) comprises glass sintering electrode plug, metal bridge silk, igniter, Can and plastic insulation shell.
3. according to claim 1 or claim 2 the gas generator of safety belt pretensioner is characterized in that the dose of described nitrocotton class gas generant composition in accordance (7) is 0.5g～2.0g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203808534U CN202243333U (en) | 2011-10-10 | 2011-10-10 | Gas generator for seat belt pre-tensioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203808534U CN202243333U (en) | 2011-10-10 | 2011-10-10 | Gas generator for seat belt pre-tensioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202243333U true CN202243333U (en) | 2012-05-30 |
Family
ID=46104620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203808534U Expired - Lifetime CN202243333U (en) | 2011-10-10 | 2011-10-10 | Gas generator for seat belt pre-tensioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202243333U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015135481A1 (en) * | 2014-03-11 | 2015-09-17 | Feng Zhide David | Belt pretensioner |
| CN107036930A (en) * | 2017-05-08 | 2017-08-11 | 浙江物产汽车安全科技有限公司 | The performance testing device of gas generant composition in accordance in a kind of air bag |
-
2011
- 2011-10-10 CN CN2011203808534U patent/CN202243333U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015135481A1 (en) * | 2014-03-11 | 2015-09-17 | Feng Zhide David | Belt pretensioner |
| US10315618B2 (en) | 2014-03-11 | 2019-06-11 | Zhide David FENG | Belt pretensioner |
| CN107036930A (en) * | 2017-05-08 | 2017-08-11 | 浙江物产汽车安全科技有限公司 | The performance testing device of gas generant composition in accordance in a kind of air bag |
| CN107036930B (en) * | 2017-05-08 | 2023-09-01 | 浙江物产汽车安全科技有限公司 | Performance test device for gas generating medicine in safety airbag |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120530 |
|
| CX01 | Expiry of patent term |