WO2014012650A1 - Airbag module, particularly driver-side airbag module - Google Patents
Airbag module, particularly driver-side airbag module Download PDFInfo
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- WO2014012650A1 WO2014012650A1 PCT/EP2013/002093 EP2013002093W WO2014012650A1 WO 2014012650 A1 WO2014012650 A1 WO 2014012650A1 EP 2013002093 W EP2013002093 W EP 2013002093W WO 2014012650 A1 WO2014012650 A1 WO 2014012650A1
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- Prior art keywords
- gas bag
- thread
- bag module
- module according
- base
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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
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/203—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns
- B60R21/2035—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns using modules containing inflator, bag and cover attachable to the steering wheel as a complete sub-unit
- B60R21/2037—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns using modules containing inflator, bag and cover attachable to the steering wheel as a complete sub-unit the module or a major component thereof being yieldably mounted, e.g. for actuating the horn switch or for protecting the driver in a non-deployment situation
-
- 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
- B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
- B60R21/217—Inflation fluid source retainers, e.g. reaction canisters; Connection of bags, covers, diffusers or inflation fluid sources therewith or together
Definitions
- Airbag module in particular driver's airbag module
- the invention relates to an airbag module, in particular a driver's airbag module according to the preamble of claim 1.
- the vast majority of currently manufactured driver gas bag modules ie the gas bag modules, which are arranged in the hub region of a steering wheel of a motor vehicle, are currently constructed substantially as follows:
- a housing consisting of two basic elements housing assembly which encloses a receiving space, in which Airbag is folded.
- the lower part of the housing assembly which is usually referred to as a container, an opening through which a mostly designed as a gas generator inflator projects into the interior of the receiving space and also into the interior of the gas bag.
- the container is a generally made of plastic cover member is arranged, which has a roof which forms the steering wheel hub.
- connection between the gas bag and the floor and between the bottom and the gas generator is usually as follows: Inside the gas bag, a so-called retainer ring is arranged, from which several fastening bolts extend through corresponding mounting holes in the gas bag, corresponding mounting holes in the bottom and corresponding mounting holes of a mounting flange of the gas generator , For example, nuts are screwed onto these fastening bolts.
- a "sandwich” is formed, whose two outer layers are the retainer ring and the nuts and whose inner layers consist of the gas bag, the housing bottom and the mounting flange of the gas generator
- the floor has for this purpose a contact surface - referred to here as the first contact surface at which the fastening
- BEST ⁇ TäGUNGSKOPIE supply flange of the gas generator is applied.
- the gas generator flange is located on the outside of the ground, but it is also possible that the Gasgeneratorflansch lies on the inside of the ground.
- the retainer ring, the bolts and the nuts are usually made of metal.
- the present invention has the object to develop a generic airbag module to the effect that it can be mounted on the one hand with little effort and on the other opens up the possibility of weight savings.
- the base has a thread running around the first contact surface, and a fastening element having a mating thread is provided with a second contact surface, which is screwed onto the thread of the base.
- the attachment of the mounting flange of the inflator is clamped between the two contact surfaces.
- the retainer ring is replaced by an annular fastening element.
- the assembly of the inflator (usually a gas generator) on the housing bottom is, as will be seen later in the description of the specific embodiment, very simple and feasible in no time. It would even be possible to fully automate this assembly step.
- the annular fastener as well as the bottom can be made of plastic, resulting in a weight reduction.
- the fastening supply flange of the inflator which must usually be made of metal, are made very small, resulting in a further weight reduction.
- the attachment of the inflator according to the invention to the bottom of the housing assembly will in many embodiments not allow for "simultaneous" attachment of the gas bag to the housing bottom
- the gas bag is clamped between the side wall of a cover member and the floor.
- FIG. 1 shows all individual parts of a gas bag module according to the invention in a completely unmounted state
- FIG. 1 in an enlarged view
- FIG. 3 shows that shown in FIG. 2 after a first assembly step
- FIG. 4 shows that shown in FIG. 3 after a second assembly step
- Figure 5 is a subassembly consisting of the bottom by means of
- FIG. 6 shows the two subassemblies from FIG. 5 after completion of a further assembly step
- FIG. 7 shows that shown in FIG. 6 after completion of the assembly of the gas bag module.
- FIG. 1 shows all individual parts of a preferred embodiment of the gas bag module according to the invention. In the state shown in Figure 1, these items are completely ünmontiert.
- the gas bag module has a cover element 10, an outer clamping ring 30, an inner clamping ring 24, an airbag 20, a rigid base 40, a gas generator 50 serving as an inflator and an annular fastening element 60.
- the cover 10 has a roof 12 and a circumferential side wall 14 extending from the roof 12 in the axial direction.
- the cover 10 which is preferably an injection molded part made of plastic, forms a kind of pot.
- the side wall 14 forms a ring with a substantially circular cross-section in the embodiment shown. However, another cross-section, in particular a polygonal, is also possible.
- the cover 10 and the bottom 40 together form a housing assembly, which in the assembled state enclosing a receiving space in which the gas bag is folded. 5
- the side wall 14 has an outer contour 16 and an inner contour 18.
- the inner contour 18 in this case forms a groove with a horizontal surface portion 18a and an upwardly extending surface portion 18b.
- the outer contour has a first upwardly facing surface portion 16a and a Keil0 adjacent thereto in the direction of the roof portion 12 with a downwardly facing surface portion 16b and with a second upwardly facing surface portion 16c.
- “Pointing upwards” and “pointing downwards” here means obliquely upwards or downwards pointing, so that the respective surface normal have an axial and a radial portion.
- the first upwardly facing surface portion 16a is substantially opposite the inner contour 18, wherein the upwardly extending surface portion 18b of the inner contour 18 and the first upwardly facing surface portion 16a of the outer contour 16 extend parallel to each other.
- the lower edge portion of the side wall 14 has a tapered portion 14a, with the corresponding taper tapering upward. "Up” in this application means “towards the roof portion”.
- the lower edge region may have slits extending in the radial direction in order to increase the elasticity of this region.
- the tapered portion 14a is divided into a plurality of segments.
- the outer clamping ring 30 has a ring rail with a substantially V-shaped cross section with an inner leg 32 and an outer leg 34. An inwardly facing surface 32 of the outer clamping ring 30 is inclined and dimensioned so that it is in abutment with the first top-facing surface portion 16a of the outer contour 16 can be brought, as will be seen later.
- the outer clamping ring 30 has an upwardly facing surface 32b, which is inclined and dimensioned so that it is engageable with the downwardly facing surface portion 16b of the outer contour 16; This will be seen later.
- the inner clamping ring 24 is designed and dimensioned so that it fits together with an outer edge of the bottom 40 in the inner contour 18, to which it has an outwardly facing surface 24a. Furthermore, the inner clamping ring 24 on the inside of a recess 26.
- the inner clamping ring 24 is also preferably an injection molded part made of plastic.
- the bottom 40 which is preferably made as a plastic part, has an upwardly extending outer annular shoulder 42, which is extends in the assembled state in the recess 26 of the inner clamping ring 24, as will be seen later with reference to Figure 5.
- the bottom 40 has a central opening 44, through which the gas generator 50 projects into the interior of the receiving space of the housing assembly and thus into the interior of the airbag 20.
- This opening 44 is - in this embodiment on the inside of the housing assembly - circulated by a first bearing surface 46;
- This first contact surface in turn is surrounded by an inner annular projection 48 which carries a thread, namely the inner thread 49.
- the inflator 50 has a mounting flange 52 circumscribing the main body of the inflator, which has an inner radially extending portion 52a and an upwardly extending portion 52b extending from the outer end of the radially extending portion 52a, the height of which is substantially that of FIG Level of the soil corresponds.
- the mounting flange could also be flat.
- the annular Befest onlyselemeht 60 has a downwardly facing second abutment surface 62 and a thread of the bottom matching mating thread, namely the external thread 64, on.
- Figures 2 to 4 show the assembly of a subassembly, which consists of the components just described:
- the gas generator 50 is applied from above to the floor 40 so that a lower part of the gas generator 50 extends through the opening 44 and the radially extending Section 52a of the mounting flange 52 rests on the first bearing surface 46.
- the annular fastener 60 is screwed into the internal thread 49 of the inner annular shoulder of the bottom 40 until the second abutment surface 62 on the upper end surface of the upwardly extending Absp- cut 52b of the mounting flange rests, so that the mounting flange 52 is clamped between the two contact surfaces 46, 62.
- the annular fastener 60 may be secured to the inner annular shoulder 48 by gluing, latching, or the like. Preferably, the annular fastener 60 extends at least to the height of the exhaust ports 51 of the gas generator 50 so that it may continue to serve as a gas deflector.
- both the bottom 40 and the annular fastening element 60 made of plastic. Since the mounting flange 52 is in direct thermal contact with the main body of the preferably pyrotechnic gas generator and thus can become quite hot, it is preferable in this case that the corresponding plastics have a high temperature resistance, which can be achieved by the corresponding plastic parts the radiation-crosslinked injection molding, as is known, for example, from the production of plastic elements electrical connector.
- the airbag 20 is arranged by means of the inner clamping ring 24 on the bottom part 40, wherein an edge of the airbag 20, so the Einblasmund, is clamped between the inner clamping ring 24 and the annular projection 42 is held.
- this clamping would not be sufficient for holding the airbag 20 on the bottom part 40 when filling the airbag without further measures.
- the present subassembly is referred to as the first subassembly.
- FIG. 5 shows two independently pre-assembled subassemblies, namely the first subassembly described above and a second subassembly in which the outer clamping ring 30 has been pushed onto the side wall 14 from the second upwardly facing surface section 16c of the outer subassembly. S Bockontur 16 is held in position.
- the lower region of the side wall 14 and / or the outer clamping ring 30 must have a certain elasticity, for which purpose the already mentioned radial slots can be provided in the lower edge region of the side wall 14.
- FIG. 6 shows a next mounting state.
- the gas bag 20 has been fished into the cover 10 and the bottom 40 is inserted together with the inner clamping ring 24 in the side wall 14 until an outer edge of the bottom 40 and the outwardly facing surface 24a of the inner clamping ring 24 in the inner contour of the 18th to come to rest.
- the outer clamping ring 30 is in an axial downward movement (that is, from the roof portion 12 away) maro- be 'ri, until the condition shown in Figure 7 is achieved.
- the outer legs 34 of the outer clamping ring 30 can serve to hold the airbag module together with not shown, acting in the axial direction of the horn springs on steering wheel-side holding parts 50.
- the gas generator projects into the interior of the receiving space and also into the interior of the gas bag, wherein a direct influx of gas bag material by hot gas, which exits the outlet openings 51 of the gas generator through the annular fastener which extends in the axial direction to the level of the outlet openings, and thus also serves as a deflector is prevented.
- the fastener could be formed as a diffuser spanning the gas generator.
- the fastener as consisting of two sections, namely an annular portion which substantially corresponds to the annular fastener of the embodiment described above, and a dome-shaped portion which forms the diffuser cage.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
Description
Gassackmodul, insbesondere Fahrer-Gassackmodul Airbag module, in particular driver's airbag module
Beschreibung description
Die Erfindung betrifft ein Gassackmodul, insbesondere ein Fahrer-Gassackmodul nach dem Oberbegriff des Anspruchs 1. The invention relates to an airbag module, in particular a driver's airbag module according to the preamble of claim 1.
Die überwiegende Anzahl der derzeit hergestellten Fahrer-Gassackmodule, also der Gassackmodule, welche im Nabenbereich eines Lenkrades eines Kraftfahrzeuges angeordnet sind, sind derzeit im Wesentlichen wie folgt aufgebaut: Es ist eine aus zwei Grundelementen bestehende Gehäusebaugruppe vorhanden, welche einen Aufnahmeräum umschließt, in welchen der Gassack eingefaltet ist. Hierbei weist der untere Teil der Gehäusebaugruppe, welcher zumeist als Container bezeichnet wird, eine Öffnung auf, durch die ein zumeist als Gasgenerator ausgebildeter Inflator ins innere des Aufnahmeraumes und auch ins Innere des Gassäckes ragt. Am Container ist ein in der Regel aus Kunststoff bestehendes Abdeckelement angeordnet, welches ein Dach aufweist, das die Lenkradnabe bildet. Die Verbindung zwischen Gassack und Boden sowie zwischen Boden und Gasgenerator erfolgt hierbei zumeist wie folgt: Im Inneren des Gassackes ist ein sogenannter Retainerring angeordnet, von dem sich mehrere Befestigungsbolzen durch entsprechende Befestigungslöcher im Gassack, entsprechende Befestigungslöcher im Boden und entsprechende Befestigungslöcher eines Befestigungsflansches des Gasgenerators erstrecken. Auf diese Befestigungsbolzen werden beispielsweise Muttern aufgeschraubt. Es wird somit ein„Sandwich" gebildet, dessen beide äußeren Schichten der Retainerring und die Muttern sind und dessen innere Schichten aus dem Gassack, dem Gehäuseboden und dem Befestigungsflansch des Gasgenerators bestehen. Der Boden weist hierzu eine Anlagefläche - hier als erste Anlagefläche bezeichnet - auf, an welcher der Befesti- The vast majority of currently manufactured driver gas bag modules, ie the gas bag modules, which are arranged in the hub region of a steering wheel of a motor vehicle, are currently constructed substantially as follows: There is a housing consisting of two basic elements housing assembly which encloses a receiving space, in which Airbag is folded. Here, the lower part of the housing assembly, which is usually referred to as a container, an opening through which a mostly designed as a gas generator inflator projects into the interior of the receiving space and also into the interior of the gas bag. The container is a generally made of plastic cover member is arranged, which has a roof which forms the steering wheel hub. The connection between the gas bag and the floor and between the bottom and the gas generator is usually as follows: Inside the gas bag, a so-called retainer ring is arranged, from which several fastening bolts extend through corresponding mounting holes in the gas bag, corresponding mounting holes in the bottom and corresponding mounting holes of a mounting flange of the gas generator , For example, nuts are screwed onto these fastening bolts. Thus, a "sandwich" is formed, whose two outer layers are the retainer ring and the nuts and whose inner layers consist of the gas bag, the housing bottom and the mounting flange of the gas generator The floor has for this purpose a contact surface - referred to here as the first contact surface at which the fastening
BESTÄTäGUNGSKOPIE gungsflansch des Gasgenerators anliegt. Häufig liegt der Gasgeneratorflansch außen am Boden an, es ist jedoch auch möglich, dass der Gasgeneratorflansch innen am Boden anliegt. Der Retainerring, die Bolzen und die Muttern bestehen hierbei in der Regel aus Metall. BESTÄTäGUNGSKOPIE supply flange of the gas generator is applied. Often the gas generator flange is located on the outside of the ground, but it is also possible that the Gasgeneratorflansch lies on the inside of the ground. The retainer ring, the bolts and the nuts are usually made of metal.
Nachteilig an diesem Stand der Technik ist zum einen der hohe, kaum zu automatisierende Herstellungsaufwand sowie das relativ hohe Gewicht, welches durch den metallenen Befstigungsflansch und den metallenen Retainerring bedingt ist. A disadvantage of this prior art, on the one hand, the high, hardly to be automated manufacturing effort and the relatively high weight, which is due to the metal Befstigungsflansch and the metal Retainerring.
Hiervon ausgehend stellt sich die vorliegende Erfindung die Aufgabe, ein gattungsgemäßes Gassackmodul dahingehend weiterzubilden, dass es zum einen mit geringem Aufwand montiert werden kann und zum anderen die Möglichkeit zur Gewichtseinsparung eröffnet. On this basis, the present invention has the object to develop a generic airbag module to the effect that it can be mounted on the one hand with little effort and on the other opens up the possibility of weight savings.
Diese Aufgabe wird durch ein Gassackmodul mit den Merkmalen des Anspruchs 1 gelöst. This object is achieved by an airbag module having the features of claim 1.
Erfindungsgemäß weist der Boden ein die erste Anlagefläche umlaufendes Gewinde auf, und es ist ein ein Gegengewinde aufweisendes Befestigungselement mit einer zweiten Anlagefläche vorgesehen, welches auf das Gewinde des Bodens aufgeschraubt ist. Die Befestigung des Befestigungsflansches des Inflators erfolgt klemmend zwischen den beiden Anlageflächen. In dieser Weise wird also der Retainerring durch ein ringförmiges Befestigungselement ersetzt. Die Montage des Inflators (in der Regel ein Gasgenerator) am Gehäuseboden ist, wie man später bei der Beschreibung des konkreten Ausführungsbeispiels sehen wird, sehr einfach und in kürzester Zeit durchführbar. Es wäre es sogar möglich, diesen Montageschritt vollständig zu automatisieren. Weiterhin kann das ringförmige Befestigungselement ebenso wie der Boden aus Kunststoff gefertigt werden, was zu einer Gewichtsreduzierung führt. Zur Erhöhung der Temperaturfestigkeit ist es hier zu bevorzugen, den Kunststoff, aus dem das Befestigungselement und/oder der Boden gefertigt sind, strahlungszuvernetzen. Weiterhin kann der Befesti- gungsflansch des Inflators, welcher in der Regel aus Metall bestehen muss, sehr klein ausgeführt werden, was zu einer weiteren Gewichtsreduktion führt. According to the invention, the base has a thread running around the first contact surface, and a fastening element having a mating thread is provided with a second contact surface, which is screwed onto the thread of the base. The attachment of the mounting flange of the inflator is clamped between the two contact surfaces. In this way, therefore, the retainer ring is replaced by an annular fastening element. The assembly of the inflator (usually a gas generator) on the housing bottom is, as will be seen later in the description of the specific embodiment, very simple and feasible in no time. It would even be possible to fully automate this assembly step. Furthermore, the annular fastener as well as the bottom can be made of plastic, resulting in a weight reduction. To increase the temperature resistance, it is preferable here to radiation-crosslink the plastic from which the fastening element and / or the floor are made. Furthermore, the fastening supply flange of the inflator, which must usually be made of metal, are made very small, resulting in a further weight reduction.
Die erfindungsgemäße Befestigung des Inflators am Boden der Gehäusebau- gruppe wird in vielen Ausführungsformen keine „gleichzeitige" Befestigung des Gassackes am Gehäuseboden erlauben. Vorzugsweise nach Anspruch 6 ist deshalb der Gassack klemmend zwischen der Seitenwand eines Abdeckelementes und dem Boden gehalten. The attachment of the inflator according to the invention to the bottom of the housing assembly will in many embodiments not allow for "simultaneous" attachment of the gas bag to the housing bottom Preferably, the gas bag is clamped between the side wall of a cover member and the floor.
Weitere bevorzugte Ausführungsformen der Erfindung ergeben sich aus den Unteransprüchen sowie aus dem nun mit Bezug auf die Figuren näher beschriebenen Ausführungsbeispiel. Hierbei zeigen: Further preferred embodiments of the invention will become apparent from the subclaims and from the embodiment now described in more detail with reference to the figures. Hereby show:
Figur 1 sämtliche Einzelteile eines erfindungsgemäßen Gassackmoduls in vollständig unmontlertem Zustand, FIG. 1 shows all individual parts of a gas bag module according to the invention in a completely unmounted state,
Figur 2 Boden, Gasgenerator und ringförmiges Befestigungselement aus Figure 2 bottom, gas generator and annular fastener
Figur 1 in einer vergrößerten Darstellung, FIG. 1 in an enlarged view,
Figur 3 das in Figur 2 Gezeigte nach einem ersten Montageschritt, FIG. 3 shows that shown in FIG. 2 after a first assembly step,
Figur 4 das in Figur 3 Gezeigte nach einem zweiten Montageschritt, FIG. 4 shows that shown in FIG. 3 after a second assembly step,
Figur 5 eine Unterbaugruppe, bestehend aus dem am Boden mittels des Figure 5 is a subassembly consisting of the bottom by means of
Befestigungselementes gehaltenen Gasgenerator und einem am Boden mittels eines inneren Klemmrings vormontierten Gassack, sowie eine Unterbaugruppe bestehend aus einem Abdeckeiement und einem außen am Abdeckelement angeordneten äußeren Klemmring, Figur 6 die beiden Unterbaugruppen aus Figur 5 nach Abschluss eines weiteren Montageschrittes und Fastening element held gas generator and a pre-assembled on the ground by means of an inner clamping ring airbag, and a subassembly consisting of a cover and an outside of the cover arranged outer clamping ring, FIG. 6 shows the two subassemblies from FIG. 5 after completion of a further assembly step and FIG
5 Figur 7 das in Figur 6 Gezeigte nach Beendigung der Montage des Gassackmoduls. FIG. 7 shows that shown in FIG. 6 after completion of the assembly of the gas bag module.
Die Figur 1 zeigt sämtliche Einzelteile einer bevorzugten Ausführungsform des 10 erfindungsgemäßen Gassackmoduls. Im in Figur 1 gezeigten Zustand sind diese Einzelteile vollständig ünmontiert. Das Gassackmodul weist ein Abdeckelement 10, einen äußeren Klemmring 30, einen inneren Klemmring 24, einen Gassack 20, einen starren Boden 40, einen als Inflator dienenden Gasgenerator 50 und ein ringförmiges Befestigungselement 60 auf. FIG. 1 shows all individual parts of a preferred embodiment of the gas bag module according to the invention. In the state shown in Figure 1, these items are completely ünmontiert. The gas bag module has a cover element 10, an outer clamping ring 30, an inner clamping ring 24, an airbag 20, a rigid base 40, a gas generator 50 serving as an inflator and an annular fastening element 60.
I 5 I 5
Die Abdeckung 10 weist ein Dach 12 und eine sich vom Dach 12 in axialer Richtung erstreckende, umlaufende Seitenwand 14 auf. Somit bildet die Abdeckung 10, welche vorzugsweise ein Spritzgussteil aus Kunststoff ist, eine Art Topf. Die Seitenwand 14 bildet einen Ring mit einem im gezeigten Ausführungsbeispiel im0 Wesentlichen kreisförmigen Querschnitt. Ein anderer Querschnitt, insbedondere eine vieleckiger, ist jedoch ebenso möglich. Die Abdeckung 10 und der Boden 40 bilden zusammen eine Gehäusebaugruppe, welche im montierten Zustand einen Aufnahmeraum umschließ, in welchen der Gassack eingefaltet ist. 5 Die Seitenwand 14 weist eine Außenkontur 16 und eine Innenkontur 18 auf. Die Innenkontur 18 bildet hierbei eine Nut mit einem horizontalen Oberflächenabschnitt 18a und einem nach oben verlaufenden Oberflächenabschnitt 18b . Die Außenkontur weist einen ersten nach oben weisenden Oberflächenabschnitt 16a und einen sich hieran in Richtung des Dachabschnittes 12 anschließenden Keil0 mit einem nach unten weisenden Oberflächenabschnitt 16b und mit einem zweiten nach oben weisenden Oberflächenabschnitt 16c auf. „Nach oben weisend" und„nach unten weisend" bedeutet hier schräg nach oben beziehungsweise un- ten weisend, so dass die jeweiligen Flächennormalen einen axialen und einen radialen Anteil haben. Der erste nach oben weisende Oberflächenabschnitt 16a liegt der Innenkontur 18 im Wesentlichen gegenüber, wobei sich der nach oben verlaufende Oberflächenabschnitt 18b der Innenkontur 18 und der erste nach oben weisende Oberflächenabschnitt 16a der Außenkontur 16 parallel zueinander erstrecken. The cover 10 has a roof 12 and a circumferential side wall 14 extending from the roof 12 in the axial direction. Thus, the cover 10, which is preferably an injection molded part made of plastic, forms a kind of pot. The side wall 14 forms a ring with a substantially circular cross-section in the embodiment shown. However, another cross-section, in particular a polygonal, is also possible. The cover 10 and the bottom 40 together form a housing assembly, which in the assembled state enclosing a receiving space in which the gas bag is folded. 5 The side wall 14 has an outer contour 16 and an inner contour 18. The inner contour 18 in this case forms a groove with a horizontal surface portion 18a and an upwardly extending surface portion 18b. The outer contour has a first upwardly facing surface portion 16a and a Keil0 adjacent thereto in the direction of the roof portion 12 with a downwardly facing surface portion 16b and with a second upwardly facing surface portion 16c. "Pointing upwards" and "pointing downwards" here means obliquely upwards or downwards pointing, so that the respective surface normal have an axial and a radial portion. The first upwardly facing surface portion 16a is substantially opposite the inner contour 18, wherein the upwardly extending surface portion 18b of the inner contour 18 and the first upwardly facing surface portion 16a of the outer contour 16 extend parallel to each other.
Der untere Randbereich der Seitenwand 14 weist einen konisch verlaufenden Abschnitt 14a auf, wobei sich der entsprechende Konus nach oben verjüngt.„Nach oben" bedeutet in dieser Anmeldung„in Richtung des Dachabschnitts". Der untere Randbereich kann in radialer Richtung verlaufende Schlitze aufweisen, um die Elastizität dieses Bereichs zu erhöhen. In diesem Fall ist der konisch verlaufende Abschnitt 14a in mehrere Segmente unterteilt. Der äußere Klemmring 30 hat eine Ringschiene mit einem im Wesentlichen V- förmigen Querschnitt mit einem inneren Schenkel 32 und einem äußeren Schenkel 34. Eine nach innen weisende Fläche 32 des äußeren Klemmringes 30 ist so geneigt und dimensioniert, dass sie in Anlage mit dem ersten nach oben weisenden Oberflächenabschnitt 16a der Außenkontur 16 gebracht werden kann, wie man später noch sehen wird. Weiterhin weist der äußere Klemmring 30 eine nach oben weisende Fläche 32b auf, welche so geneigt und dimensioniert ist, dass sie in Anlage mit dem nach unten weisenden Oberflächenabschnitt 16b der Außenkontur 16 bringbar ist; auch dies wird man später sehen. Der innere Klemmring 24 ist so ausgestaltet und dimensioniert, dass er gemeinsam mit einem äußeren Rand des Bodens 40 in die Innenkontur 18 passt, wozu er eine nach außen weisende Fläche 24a aufweist. Weiterhin weist der innere Klemmring 24 auf der Innenseite eine Einbuchtung 26 auf. Der innere Klemmring 24 ist ebenfalls vorzugsweise ein Spritzgussteil aus Kunststoff. The lower edge portion of the side wall 14 has a tapered portion 14a, with the corresponding taper tapering upward. "Up" in this application means "towards the roof portion". The lower edge region may have slits extending in the radial direction in order to increase the elasticity of this region. In this case, the tapered portion 14a is divided into a plurality of segments. The outer clamping ring 30 has a ring rail with a substantially V-shaped cross section with an inner leg 32 and an outer leg 34. An inwardly facing surface 32 of the outer clamping ring 30 is inclined and dimensioned so that it is in abutment with the first top-facing surface portion 16a of the outer contour 16 can be brought, as will be seen later. Furthermore, the outer clamping ring 30 has an upwardly facing surface 32b, which is inclined and dimensioned so that it is engageable with the downwardly facing surface portion 16b of the outer contour 16; This will be seen later. The inner clamping ring 24 is designed and dimensioned so that it fits together with an outer edge of the bottom 40 in the inner contour 18, to which it has an outwardly facing surface 24a. Furthermore, the inner clamping ring 24 on the inside of a recess 26. The inner clamping ring 24 is also preferably an injection molded part made of plastic.
Der Boden 40, welcher vorzugsweise als Kunststoffteil ausgeführt ist, weist einen sich nach oben erstreckenden äußeren ringförmigen Ansatz 42 auf, welcher sich im montiertem Zustand in die Einbuchtung 26 des inneren Klemmringes 24 erstreckt, wie man später mit Bezug auf die Figur 5 sehen wird. The bottom 40, which is preferably made as a plastic part, has an upwardly extending outer annular shoulder 42, which is extends in the assembled state in the recess 26 of the inner clamping ring 24, as will be seen later with reference to Figure 5.
Weiterhin hat der Boden 40 eine zentrale Öffnung 44, durch welche der Gasgene- rator 50 ins Innere des Aufnahmeraums der Gehäusebaugruppe und somit ins Innere des Gassackes 20 ragt. Diese Öffnung 44 wird - in diesem Ausführungsbeispiel auf der Innenseite der Gehäusebaugruppe - von einer ersten Anlagefläche 46 umlaufen; Diese erste Anlagefläche wiederum wird von einem inneren ringförmigen Ansatz 48 umlaufen, welcher ein Gewinde, nämlich das Innengewin- de 49, trägt. Im gezeigten Ausfuhrüngsbeispiel befindet sich zwischen der ersten Anlagefläche 46 und dem Innengewinde 49 eine Stufe. Furthermore, the bottom 40 has a central opening 44, through which the gas generator 50 projects into the interior of the receiving space of the housing assembly and thus into the interior of the airbag 20. This opening 44 is - in this embodiment on the inside of the housing assembly - circulated by a first bearing surface 46; This first contact surface in turn is surrounded by an inner annular projection 48 which carries a thread, namely the inner thread 49. In the embodiment shown, there is a step between the first contact surface 46 and the internal thread 49.
Der Gasgenerator 50 hat einen den Hauptkörper des Gasgenerators in Umfangs- richtung umlaufenden Befestigungsflansch 52, welcher einen inneren, radial ver- laufenden Abschnitt 52ä und einen sich vom äußeren Ende des radial verlaufenden Abschnitts 52a nach oben erstreckenden Abschnitt 52b, dessen Höhe im Wesentlichen der der Stufe des Bodens entspricht. Alternati könnte der Befestigungsflansch auch eben ausgebildet sein. The inflator 50 has a mounting flange 52 circumscribing the main body of the inflator, which has an inner radially extending portion 52a and an upwardly extending portion 52b extending from the outer end of the radially extending portion 52a, the height of which is substantially that of FIG Level of the soil corresponds. Alternatively, the mounting flange could also be flat.
Das ringförmige Befestigungselemeht 60 weist eine nach unten weisende zweite Anlagefläche 62 sowie ein zum Gewinde des Bodens passendes Gegengewinde, nämlich das Außengewinde 64, auf. The annular Befestigungselemeht 60 has a downwardly facing second abutment surface 62 and a thread of the bottom matching mating thread, namely the external thread 64, on.
Die Figuren 2 bis 4 zeigen die Montage einer Unterbaugruppe, welche aus den eben beschriebenen Bauteilen besteht: Zunächst wird der Gasgenerator 50 von oben derart auf den Boden 40 aufgebracht, dass sich ein unterer Teil des Gasgenerators 50 durch die Öffnung 44 erstreckt und der radial verlaufende Abschnitt 52a des Befestigungsflansches 52 auf der ersten Anlagefläche 46 aufliegt. Anschließend wird das ringförmige Befestigungselement 60 in das Innengewinde 49 des inneren ringförmigen Ansatzes des Bodens 40 eingeschraubt, bis die zweite Anlagefläche 62 auf der oberen Endfläche des sich nach oben erstreckenden Ab- schnitts 52b des Befestigungsflansches aufliegt, so dass der Befestigungsflansch 52 zwischen den beiden Anlageflächen 46, 62 klemmend gehalten ist. Im Falle eines ebenen Befestigungsflansches würde die zweite Anlagefläche auf die Oberseite des Befestigungsflansches drücken. Das ringförmige Befestigungselement 60 kann durch Verkleben, Verrasten oder dergleichen am inneren ringförmigen Ansatz 48 gesichert werden. Vorzugsweise erstreckt sich das ringförmige Befestigungselement 60 wenigstens bis auf die Höhe der Ausströmöffnungen 51 des Gasgenerators 50, so dass es weiterhin als Gasdeflektor dienen kann. Figures 2 to 4 show the assembly of a subassembly, which consists of the components just described: First, the gas generator 50 is applied from above to the floor 40 so that a lower part of the gas generator 50 extends through the opening 44 and the radially extending Section 52a of the mounting flange 52 rests on the first bearing surface 46. Subsequently, the annular fastener 60 is screwed into the internal thread 49 of the inner annular shoulder of the bottom 40 until the second abutment surface 62 on the upper end surface of the upwardly extending Absp- cut 52b of the mounting flange rests, so that the mounting flange 52 is clamped between the two contact surfaces 46, 62. In the case of a flat mounting flange, the second bearing surface would press on the top of the mounting flange. The annular fastener 60 may be secured to the inner annular shoulder 48 by gluing, latching, or the like. Preferably, the annular fastener 60 extends at least to the height of the exhaust ports 51 of the gas generator 50 so that it may continue to serve as a gas deflector.
Grundsätzlich ist es zu bevorzugen, sowohl den Boden 40 als auch das ringförmige Befestigungselement 60 aus Kunststoff zu fertigen. Da der Befestigungsflansch 52 in unmittelbarem thermischen Kontakt zum Hauptkörper des vorzugsweise pyrotechnischen Gasgenerators steht und somit recht heiß werden kann, ist es hierbei zu bevorzugen, dass die entsprechenden Kunststoffe eine hohe Tem- peraturfestigkeit aufweisen, was dadurch erreicht werden kann, dass die entsprechenden Kunststoffteile nach dem Spritzgießen strahlungsvernetzt werden, wie dies beispielsweise aus der Herstellung von Kunststoffelementen elektrischer Steckverbinder bekannt ist. In principle, it is preferable to manufacture both the bottom 40 and the annular fastening element 60 made of plastic. Since the mounting flange 52 is in direct thermal contact with the main body of the preferably pyrotechnic gas generator and thus can become quite hot, it is preferable in this case that the corresponding plastics have a high temperature resistance, which can be achieved by the corresponding plastic parts the radiation-crosslinked injection molding, as is known, for example, from the production of plastic elements electrical connector.
In einem weiteren Montageschritt wird der Gassack 20 mittels des inneren Klemmringes 24 am Bodenteil 40 angeordnet, wobei ein Rand des Gassackes 20, also der Einblasmund, klemmend zwischen dem inneren Klemmring 24 und dem ringförmigen Ansatz 42 gehalten ist. Diese Klemmung wäre zum Halten des Gassackes 20 am Bodenteil 40 bei Befüllung des Gassackes ohne weitere Maßnah- men jedoch nicht ausreichend. Die jetzt vorliegende Unterbaugruppe wird als erste Unterbaugruppe bezeichnet. In a further assembly step, the airbag 20 is arranged by means of the inner clamping ring 24 on the bottom part 40, wherein an edge of the airbag 20, so the Einblasmund, is clamped between the inner clamping ring 24 and the annular projection 42 is held. However, this clamping would not be sufficient for holding the airbag 20 on the bottom part 40 when filling the airbag without further measures. The present subassembly is referred to as the first subassembly.
Figur 5 zeigt zwei unabhängig voneinander vormontierte Unterbaugruppen, nämlich die eben beschriebene erste Unterbaugruppe und eine zweite Unterbaugrup- pe, bei der der äußere Klemmring 30 auf die Seitenwand 14 aufgeschoben wurde, wobei er vom zweiten nach oben weisenden Oberflächenabschnitt 16c der Au- ßenkontur 16 in Position gehalten wird. Um dieses Aufschieben auf die Seitenwand 14 erreichen zu können, muss der untere Bereich der Seitenwand 14 und/oder der äußere Klemmring 30 eine gewisse Elastizität aufweisen, wozu die bereits erwähnten radiale Schlitze im unteren Randbereich der Seitenwand 14 vorgesehen sein können. FIG. 5 shows two independently pre-assembled subassemblies, namely the first subassembly described above and a second subassembly in which the outer clamping ring 30 has been pushed onto the side wall 14 from the second upwardly facing surface section 16c of the outer subassembly. Sßenkontur 16 is held in position. In order to be able to achieve this sliding on the side wall 14, the lower region of the side wall 14 and / or the outer clamping ring 30 must have a certain elasticity, for which purpose the already mentioned radial slots can be provided in the lower edge region of the side wall 14.
Die Figur 6 zeigt einen nächsten Montagezustand. Hier wurde der Gassack 20 in das Abdeckelement 10 eingefältet und der Boden 40 zusammen mit dem inneren Klemmring 24 in die Seitenwand 14 eingeschoben, bis ein äußerer Rand des Bo- dens 40 und die nach außen weisende Fläche 24a des inneren Klemmringes 24 in der Innenkontur 18 zu liegen kommen. FIG. 6 shows a next mounting state. Here, the gas bag 20 has been fished into the cover 10 and the bottom 40 is inserted together with the inner clamping ring 24 in the side wall 14 until an outer edge of the bottom 40 and the outwardly facing surface 24a of the inner clamping ring 24 in the inner contour of the 18th to come to rest.
Zum Abschlüss der Montage des Gassackmodules wird der äußere Klemmring 30 in einer axialen Bewegung nach unten (also vom Dachabschnitt 12 weg) gescho- be'ri, bis der in Figur 7 gezeigte Zustand erreicht wird. Die äußeren Schenkel 34 des äußeren Klemmringes 30 können dazu dienen, das Gassackmodul gemeinsam mit nicht dargestellten, in axialer Richtung wirkenden Hupenfedern an lenk- radseitigen Halteteilen 50 zu halten. Der Gasgenerator ragt ins Innere der Aufnahmeraums und auch ins Innere des Gassacks, wobei ein direktes Anströmen von Gassackmaterial durch heißes Gas, welches aus den Austrittsöffnungen 51 des Gasgenerators austritt durch das ringförmige Befestigungselement, welches sich in axialer Richtung bis auf Höhe des Austrittsöffnungen erstreckt, und somit auch als Deflektor dient, verhindert wird. Es wäre auch möglich, das Befestigungselement als einen den Gasgenerator überspannenden Diffusor auszubilden. In diesem Fall könnte man das Befestigungselement als aus zwei Abschnitten bestehend betrachten, nämlich aus einem ringförmigen Abschnitt, welcher im Wesentlichen dem ringförmigen Befestigungselement des oben beschriebenen Ausführungsbeispiels entspricht, und einem kuppeiförmigen Abschnitt, welcher den Diffuor-Käfig bildet. For Abschlüss the assembly of the airbag module, the outer clamping ring 30 is in an axial downward movement (that is, from the roof portion 12 away) gescho- be 'ri, until the condition shown in Figure 7 is achieved. The outer legs 34 of the outer clamping ring 30 can serve to hold the airbag module together with not shown, acting in the axial direction of the horn springs on steering wheel-side holding parts 50. The gas generator projects into the interior of the receiving space and also into the interior of the gas bag, wherein a direct influx of gas bag material by hot gas, which exits the outlet openings 51 of the gas generator through the annular fastener which extends in the axial direction to the level of the outlet openings, and thus also serves as a deflector is prevented. It would also be possible to form the fastener as a diffuser spanning the gas generator. In this case, one could consider the fastener as consisting of two sections, namely an annular portion which substantially corresponds to the annular fastener of the embodiment described above, and a dome-shaped portion which forms the diffuser cage.
Man sieht also, dass ein insgesamt sehr rationell montierbares Gassackmodul zur Verfügung gestellt wird. Bezugszeichenliste It can therefore be seen that an overall very rationally mountable gas bag module is provided. LIST OF REFERENCE NUMBERS
10 Abdeckelement 10 cover element
12 Dach 12 roof
14 Seitenwand 14 sidewall
14a konisch verlaufender Abschnitt 14a conical section
15 Vorsprung 15 advantage
16 Außenkontur 16 outer contour
16a erster nach oben weisender Oberflächenabschnitt 16b nach unten weisender Oberflächenabschnitt 16a first upwardly facing surface portion 16b downwardly facing surface portion
16c zweiter nach oben weisender Oberflächenabschnitt16c second upwardly facing surface portion
16d äußere Nut 16d outer groove
17 Rastausnehmung 17 recess
18 Innenkontur 18 inner contour
18a horizontaler Oberflächenabschnitt 18a horizontal surface section
18b nach oben verlaufender Oberflächenabschnitt 18b upwardly extending surface portion
18d innere Nut 18d inner groove
20 Gassack 20 airbag
22 Einblasmund 22 blowing mouth
24 innerer Klemmring 24 inner clamping ring
24a nach außen weisende Fläche 24a outwardly facing surface
26 Einbuchtung 26 indentation
30 äußerer Klemmring 30 outer clamping ring
32 innerer Schenkel 32 inner thigh
32a nach innen weisende Fläche 32a inward facing surface
32b nach oben weisende Fläche 32b upwardly facing surface
34 äußerer Schenkel 34 outer thigh
40 Boden 40 floor
42 äußerer ringförmiger Ansatz 42 outer annular approach
44 Öffnung 44 opening
46 erste Anlagefiäche 46 first investment area
48 innerer ringförmiger Ansatz 48 inner annular approach
49 Innengewinde 50 Gasgenerator 49 internal thread 50 gas generator
51 Austrittsöffnung 51 outlet opening
52 Befestigungsflansch 52 mounting flange
52a radial verlaufender Abschnitt 52a radially extending portion
52b sich nach oben erstreckender Abschnitt52b is an upwardly extending section
60 ringförmiges Befestigungselement60 annular fastening element
62 zweite Anlagefläche 62 second contact surface
64 Außengewinde 64 external thread
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201380036195.9A CN104411547B (en) | 2012-07-16 | 2013-07-15 | Air bag module |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102012014089.4 | 2012-07-16 | ||
| DE102012014089.4A DE102012014089B4 (en) | 2012-07-16 | 2012-07-16 | Airbag module, in particular driver's airbag module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014012650A1 true WO2014012650A1 (en) | 2014-01-23 |
Family
ID=49029053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2013/002093 Ceased WO2014012650A1 (en) | 2012-07-16 | 2013-07-15 | Airbag module, particularly driver-side airbag module |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN104411547B (en) |
| DE (1) | DE102012014089B4 (en) |
| WO (1) | WO2014012650A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2257401A (en) * | 1991-07-10 | 1993-01-13 | Breed Automotive Tech | Two piece inflator housing. |
| US5791682A (en) * | 1994-12-26 | 1998-08-11 | Toyoda Gosei Co., Ltd. | Air bag device with air bag and inflation mounting structure |
| DE10331655A1 (en) * | 2003-07-12 | 2005-02-17 | Autoliv Development Ab | Airbag module for motor vehicles |
| DE102011108795A1 (en) * | 2011-07-29 | 2013-01-31 | Autoliv Development Ab | Airbag module and method for its assembly |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2716857B1 (en) * | 1994-03-03 | 1997-07-18 | Autoliv Dev | Steering wheel with pre-assembled airbag anti-shock protection device. |
| DE19614276C1 (en) * | 1996-04-11 | 1997-08-28 | Autoliv Dev | Air bag for vehicle |
| US6550804B2 (en) * | 2001-02-23 | 2003-04-22 | Breed Automotive Technology, Inc. | Driver side air bag module with annular air bag |
| DE10331303A1 (en) * | 2003-07-11 | 2004-11-04 | Autoliv Development Ab | An airbag module with a vibration damping holder, a gas generator, a vibration damping holder and a housing protection component useful on all types of vehicles |
| DE10349458B4 (en) * | 2003-10-23 | 2010-01-14 | Autoliv Development Ab | Airbag module with a gas generator supported on the diffuser |
| WO2005080145A1 (en) * | 2004-02-21 | 2005-09-01 | Autoliv Development Ab | Airbag module comprising a clipped-in diffuser |
-
2012
- 2012-07-16 DE DE102012014089.4A patent/DE102012014089B4/en not_active Expired - Fee Related
-
2013
- 2013-07-15 WO PCT/EP2013/002093 patent/WO2014012650A1/en not_active Ceased
- 2013-07-15 CN CN201380036195.9A patent/CN104411547B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2257401A (en) * | 1991-07-10 | 1993-01-13 | Breed Automotive Tech | Two piece inflator housing. |
| US5791682A (en) * | 1994-12-26 | 1998-08-11 | Toyoda Gosei Co., Ltd. | Air bag device with air bag and inflation mounting structure |
| DE10331655A1 (en) * | 2003-07-12 | 2005-02-17 | Autoliv Development Ab | Airbag module for motor vehicles |
| DE102011108795A1 (en) * | 2011-07-29 | 2013-01-31 | Autoliv Development Ab | Airbag module and method for its assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104411547B (en) | 2016-12-07 |
| CN104411547A (en) | 2015-03-11 |
| DE102012014089B4 (en) | 2016-08-11 |
| DE102012014089A1 (en) | 2014-01-16 |
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