WO2006089670A2 - Systeme de retenue a sac de gaz - Google Patents

Systeme de retenue a sac de gaz Download PDF

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Publication number
WO2006089670A2
WO2006089670A2 PCT/EP2006/001386 EP2006001386W WO2006089670A2 WO 2006089670 A2 WO2006089670 A2 WO 2006089670A2 EP 2006001386 W EP2006001386 W EP 2006001386W WO 2006089670 A2 WO2006089670 A2 WO 2006089670A2
Authority
WO
WIPO (PCT)
Prior art keywords
winding shaft
airbag
restraint system
gas generator
gas
Prior art date
Application number
PCT/EP2006/001386
Other languages
German (de)
English (en)
Other versions
WO2006089670A3 (fr
Inventor
Walter Eberle
Christian Götz
Till Heinrich
Simon Kramer
Albert Reitinger
Julien Richert
Original Assignee
Daimlerchrysler Ag
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
Priority claimed from DE202005012244U external-priority patent/DE202005012244U1/de
Application filed by Daimlerchrysler Ag filed Critical Daimlerchrysler Ag
Priority to JP2007556528A priority Critical patent/JP2008531364A/ja
Publication of WO2006089670A2 publication Critical patent/WO2006089670A2/fr
Publication of WO2006089670A3 publication Critical patent/WO2006089670A3/fr

Links

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
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/233—Inflatable members characterised by their shape, construction or spatial configuration comprising a plurality of individual compartments; comprising two or more bag-like members, one within the other
    • 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
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/015—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
    • B60R21/01554—Seat position sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/2334—Expansion control features
    • B60R21/2338—Tethers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/23—Inflatable members
    • B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
    • B60R21/2334—Expansion control features
    • B60R21/2338—Tethers
    • B60R2021/23382—Internal tether means

Definitions

  • the invention relates to an airbag restraint system according to the preamble of patent claim 1.
  • a device is known with which the shape of a gas bag and in particular the unfolding distance in the unfolded state can be influenced.
  • arranged in the airbag tethers are provided whose length is varied by a sensor-controlled AufwiekelVorraum.
  • the position of the vehicle occupant is detected by a sensor and the length of the tethers is limited accordingly.
  • To limit the length of the tethers arranged in the airbag take-up devices are provided. From DE 100 20 795 Al it is known, depending on the position of the gas bag restraint system associated vehicle seat, to change the length of the located in the gas bag portion of a tether.
  • the invention has for its object to provide an airbag restraint system in which the deployment path of the airbag is limited, which allows reliable deployment to the predetermined deployment position of the airbag.
  • the gas bag restraint system according to the invention with an airbag and a gas generator is distinguished by an airbag limiting device which limits the maximum deployment path of the airbag as a function of occupant-relevant parameters.
  • the airbag limiting device has a storage device for at least one limiting band of the airbag limiting tether, wherein the storage device is arranged outside of the airbag. If in the context of the invention of deployment path is mentioned, so is the distance from the vehicle elements in which the airbag is arranged to the ideal impact point of an occupant on the unfolded airbag meant.
  • the occupancy parameters are all parameters which have an influence on the occupant's load in the event of an accident.
  • a tether is provided whose length has a direct influence on the deployment path of the gas bag.
  • a storage device for the tether is provided.
  • the storage device is designed so that it reliably provides a certain length of tether at all times.
  • the storage device is arranged outside the gas bag. This means that the storage device is not arranged in the gas bag but in the vicinity of the gas bag.
  • the arrangement of the storage device which is independent of the gas bag, ensures that the gas bag can reliably deploy independently of the storage device of the tether at each set length of the tether.
  • the invention can also be used independently of any gas bag form or airbag deployment.
  • An easy way to ensure control of the ⁇ ntfaltungs zone of Gassa ⁇ ks depending on occupant load relevant parameters is to set the maximum deployment path of the airbag in dependence on the position of the restraint system associated vehicle seat.
  • a small, light person places the vehicle seat further forward relative to the steering wheel, and a large, heavy person places the vehicle seat further to the rear.
  • This design is particularly advantageous because of the position the vehicle seat particularly easy to capture and transferred to the airbag-limiting device. It is also conceivable to determine the maximum deployment path of the gas bag by a linear, a non-linear or a limited linear function of the position of the restraint system associated vehicle seat.
  • limiting the airbag sizing may result from a seated position that is greater or less than a seated position for riding or comfortable sitting. This is for example given in two-door vehicles when the seat is adjusted for easy boarding.
  • Another limitation may result from technical feasibility, for example, space reasons. This limitation is then mainly in the edge region of the seat adjustment and the setting of
  • Limiting device provided. It is also conceivable to provide a limitation in the middle. This then has the effect that when the seat is arranged in the region of middle seating positions, no variation on the gas bag restraint system is made.
  • a mechanical coupling between the vehicle seat and gas bag boundary means represents a particularly reliable and störunan réellee coupling.
  • the gas bag limiting device adjusts the maximum deployment path of the gas bag in dependence on the position of the vehicle seat and an optimal adaptation of the Gas bag restraint system is ensured.
  • To Sensors are required to detect the position of the vehicle seat.
  • an evaluation unit and an actuator connected to the evaluation unit is necessary, which sets the maximum deployment path of the gas bag via the gas bag boundary device.
  • the actuator may be, for example, an electric drive. It is just as conceivable to use other widely used drives, such as hydraulic drives.
  • a Bowden cable As a mechanical coupling, a Bowden cable can be provided.
  • a Bowden cable When a Bowden cable is a structurally simple component, which also still works reliably after many load changes.
  • a Bowden cable is a proven in the automotive sector, often used and therefore cost-effective component.
  • a winding shaft may be provided. It is conceivable to connect the one end of the tethers with the airbag and to connect the other end of the tethers with the winding shaft and roll up on this.
  • the tethers can be arranged both inside and outside the airbag. Of course, both arrangements are conceivable.
  • the position of the winding shaft thereby directly influences the length of the tether available in the case of an unfolding gas bag. It is conceivable to unwind the tether when changing the position of the winding shaft. It is also conceivable to produce only a tether on the winding shaft, to block the winding shaft and to provide the lots when deploying the airbag available.
  • a particularly space-saving solution is given when the winding shaft is arranged in a housing of the gas generator. It is conceivable, for example, to store the winding shaft rotatably mounted on the gas generator. This solution is particularly space-saving, since no additional space is required for the gas bag boundary device.
  • the straps stored on the winding shaft are available in the immediate vicinity of the gas bag and can be removed directly from the storage device when the gas bag is deployed. The tether is where it is needed, so that always a safe deployment is guaranteed.
  • the winding shaft may be connected directly or indirectly with the Bowden cable.
  • the winding shaft can serve as storage device for at least a portion of the Bowden cable. Between the foremost position of a vehicle seat and the rearmost position of a vehicle seat can be up to 30 cm difference. These 30 cm are therefore also available with the Bowden cable as a control variable. Due to the limited space requirement within the gas bag module or in the vicinity of an airbag module brings the possibility to wind the Bowden cable on the winding shaft, a considerable space advantage. Depending on how much Bowden cable is wound on the winding shaft, the winding shaft takes a changed angular position relative to the fixed gas generator. The winding shaft is then fixed over the Bowden cable. This means that each seating position is assigned a specific angular position of the winding shaft.
  • the Fangbandlose can be adjusted, ie the length of the tether, which is available in the event of deployment of the airbag.
  • the length of several tethers can be changed by changing the position of a winding shaft. If the winding shaft in the storage areas for the individual tethers has different diameters, different lengths of the tethers can be adjusted depending on the position of the vehicle seat. Thus, the length of several tethers can also be set differently via an airbag limiting device.
  • winding shaft for the storage of the tethers and the Bowden cables.
  • the winding shaft is composed of several sub-shafts.
  • a rotation of the sub-shaft always causes an axial displacement on the gas generator. This has the effect that one of the partial waves can be used as a stop for the rotational movement of another partial wave.
  • a damping device can be provided between two adjacent partial waves.
  • the threaded sleeve may be provided with openings which are in register with the gas outlet openings of the gas generator.
  • One way of fail-safe may be a locking of the part shaft, which stores the Bowden cable.
  • the fail-safe can be formed by two opposing coil springs, which always sets the partial wave with the Bowden cables in a 50% position.
  • 1a is a schematic representation of the gas bag restraint system according to the invention with a vehicle seat associated therewith, which occupies a front seat position;
  • Fig. Ib is a schematic representation of the gas bag restraint system according to the invention with a vehicle seat assigned thereto, which occupies a rear seat position;
  • FIG. 2 is a three-dimensional, partially sectioned view of a gas generator for an inventive gas bag restraint system
  • FIG. 3 is a sectional view of a gas generator along its longitudinal axis for an inventive gas bag restraint system
  • FIG. 4 is a three-dimensional view, which is partially cut, of a winding shaft for a gas generator of a gas bag restraint system according to the invention
  • FIG. 6 is a perspective view of a gas generator with a split winding shaft
  • FIG. 7 is a front, side and top view of the gas generator of FIG. 6,
  • FIG. 8 is a perspective view of a gas generator with reverse rotation
  • FIG. 9 is a front view and sectional view of a gas generator with a multi-rotatable winding shaft
  • 10 is a perspective view of a gas generator with gas-permeable partial wave
  • 11 is a front, side and plan view of the representation of FIG. 10
  • FIG. 12 is a perspective view of a gas generator with different translation stages
  • FIG. 13 is a perspective view of a gas generator with different translation stages in a second embodiment
  • Fig. 20a shows a fail-safe device in a fourth embodiment
  • Fig. 20b is a coordinate system in which the effect of two counter-rotating torsion springs shown in FIG. 16 is shown as well as
  • Fig. 20c is a coordinate system in which the relationship between the adjusting force and angular position of the two springs of FIG. 16 is shown.
  • gas bag restraint systems 1 which have a gas generator 2 and an airbag 3, have been used for some time. These serve to catch a vehicle occupant located on a vehicle seat 4 in the event of an accident and thus to avoid too high accelerations. If one wishes to adapt the functions of the gas bag restraint system, such as its shape or size achieved after deployment, to parameters relevant to occupant load, the invention proposes to provide a mechanical coupling in the form of a Bowden cable 5. If a vehicle seat occupies a forward position relative to the cockpit or to the steering wheel of the vehicle, then it can be assumed that there is a smaller and lighter person on the seat. For this person, a gas bag with a smaller extent in the X direction is required (see Fig. Ia).
  • the invention is concerned with varying over the Bowden cable 5, the size of the airbag 3. If the vehicle seat 4 occupies a rear position in the vehicle, then it is to be assumed that a larger or heavier person is located on the vehicle seat and a gas bag with a larger extent in the X direction is required to adequately restrain the occupant (see FIG ).
  • the airbag-limiting device has a storage device for at least one of the deployment path of the airbag limiting tether and will be described in more detail below.
  • FIG. 2 shows an exemplary embodiment of a storage device for a gas bag limiting device.
  • the storage device consists of a winding shaft 6.
  • the winding shaft 6 is hollow and, as explained below, rotatably mounted on a gas generator 7.
  • the gas generator 7 is a commercially available gas generator with an ignition charge, not shown, and gas outlet openings 8 through which gas can escape from the gas generator 7 for deployment of the airbag.
  • Around the winding shaft 6 around a housing 9 is arranged.
  • the housing 9 is also substantially cylindrical and arranged around the gas generator 7 around. It is firmly connected to the gas generator 7 via fastening elements screws 11.
  • the housing 9 has in the region of the gas outlet openings 8 of the gas generator recesses 12, which are designed so that they ensure a trouble-free escape of the gas flow.
  • the gas generator 7 is arranged with the winding shaft 6 and the housing 9 as a unit in a further housing 13, which serves to receive the gas generator 7 and the attachment of this gas generator 7 in the vehicle.
  • the housing 13 flanges 14 with holes 15.
  • FIG. 3 shows the gas generator 7 in section in a housing 13.
  • the gas outlet openings 8 in the gas generator 7 can be seen.
  • Around the gas generator 7 around the winding shaft 6 is arranged. It is rotatable about bearing 16 relative to Gas generator 7 is arranged.
  • Around the winding shaft 6 around the housing 9 can be seen, which is connected by screws 11 fixed to the gas generator 7.
  • the winding shaft 6 has several different areas. As can be seen from FIG. 2, the region of the winding shaft 6 situated above the gas outlet openings 8 of the gas generator 7 is provided with recesses 10 which serve to ensure unhindered escape of gas. In each case right and left of the area with the recesses 10 storage devices 17a to 17d are provided for Pangb sections.
  • the storage devices 17 a to 17 d consist of grooves that extend radially around the winding shaft 6 around. They have a defined diameter D, which extends over a width adapted to the tethers. In the illustrated embodiment, the diameter D of the grooves 17a to 17d are the same size.
  • the tethers, not shown, are wound around the winding shaft 6 in the corresponding grooves 17a to 17d. Each groove 17a to 17d takes on exactly one tether. Each groove is delimited laterally and has a Oberflä ⁇ henbelvesheit, which always allows a reliable winding and unwinding of the tethers.
  • another storage device 18 connects, which serves to receive the Bowden cable 5.
  • the storage device 18 is a part of the winding shaft ⁇ or according to the Winding shaft 6 rotatably mounted on the gas generator 7 and with
  • the winding shaft 6 firmly connected. It has a groove 19.
  • the groove 19 serves to receive the Bowden cable 5.
  • the Bowden cable 5 is fixed in the groove 19 with its one end.
  • a further groove 21 is provided in the storage device 18. This serves to receive a coil spring 22.
  • the coil spring 22 is attached at its one end to the storage device 18 and the winding shaft 6 and with its other end to the fixed housing 9. Thus, the coil spring 22 causes the winding shaft 6, when no external forces act on them, always assumes a defined starting position.
  • the region 23 within the receptacle 13 above the gas generator 7 and the housing 9 serves to receive a folded gas bag, not shown.
  • Figure 4 shows in three-dimensional form the winding shaft 6 with the housing 9 in a sectional view.
  • the recesses 12 for the passage of the gas and receptacles 24 for the screws 11 for fixing the housing 9 to the gas generator 7.
  • the winding shaft 6 is composed of different areas together.
  • the storage device 17c and 17d designed as grooves can be seen.
  • a perforated area with recesses 10 connects.
  • storage device 17a and 17b are provided.
  • the storage device 18 for receiving the Bowden cable 5 and the coil spring 22.
  • the groove 19 for receiving the Bowden cable 5 and the groove 21 for receiving the coil spring 22.
  • a slot 25th brought in At the top of the winding shaft 6 in the region of the groove 19 is a slot 25th brought in.
  • an unillustrated entrance opening is provided either in the form of a bore or in the form of a slot for the Bowden cable 5, so that this out of the airbag housing out can be.
  • the storage device 18 is fixedly connected to the winding shaft 6. In this case, all compounds, such as adhesive or welded joints but also positive connections such as gears in question.
  • FIGs 5a and 5b show another embodiment of the storage device 18 ', which is shown here detached from the winding shaft 6.
  • This storage device 18 ' differs from that described above in that the groove 21 for receiving the coil spring 22 has been supplemented by a second groove 19' for receiving a second Bowden cable.
  • the second Bowden cable can be used as a replacement of the coil spring 22 and serve to reset the winding shaft 6 in its starting position.
  • a Doppelbowdenzug is provided, each one Bowenzug is responsible for a direction of rotation.
  • two slots 26 can be seen in the drawing, which open into holes 27.
  • the slots 26 with the holes 27 serve to receive the ends of the Bowden cables and for permanent attachment of these ends to the winding shaft 6. In this way it is ensured that reliable power can be transmitted from the Bowden cables to the winding shaft 6.
  • winding shaft 6 may be provided in the set angular position additional means for locking or fixing the winding shaft 6. These can then be activated when the gas generator is ignited so that a reliable setting of the storage device is always possible before ignition.
  • a locking mechanism may be provided, for example in the form of a pawl, which is activated upon ignition of the gas bag and the winding shaft 6 additionally holds.
  • the airbag flap which opens when unfolding the gas bag can also be used to lock the winding shaft 6.
  • the particular advantage of the invention is the fact that all parameters are already set before the ignition of the gas bag. This can be done automatically with each adjustment of the Pahrzeugsitzes 4. Once ignition and thus deployment of the airbag occurs, no variation is needed and no parts have to be moved during deployment. This leads to the system functioning reliably.
  • FIG. 6 shows a winding shaft 6 'which is divided into three partial shafts 30,
  • the partial shaft 31 forms the storage device for the tethers 33 and 34 and 35 and 36.
  • the partial shaft 31 forms the storage device for two Bowden cables 37 and 38, which are connected to the Wegverstell Road.
  • both the partial shaft 30 and the partial shaft 32 grooves 39a to 39d, which serve to receive the tethers 33 to 36.
  • recesses 10 are provided in the partial shafts 30 and 32, which serve to ensure an unhindered escape of gas.
  • the partial shafts 30 to 32 are each provided with internal threads 40 which are brought into engagement with threaded sleeves 41.
  • the threaded sleeves 41 are, as can be seen in particular from FIG. 7c, fastened on the gas generator 7.
  • the middle part of shaft 31 forms a stop for the movement of the partial shafts 30 and 32, as soon as they are rotated by the withdrawal of the tethers 33 to 36 in the direction of arrow A in rotation.
  • the deduction of the tethers 33 to 36 thus causes a rotation of the partial shafts 30 and 32, which rotate the partial shafts 30 and 32 with its internal thread 40 on the threaded sleeves 41 and to move to acting as a stop part shaft 31.
  • the partial shaft 31 can be adjusted either to the right or left on the threaded sleeve 41, so that either the right part shaft 30 or the left part shaft 32 first strikes the part shaft 31.
  • the mode of operation of the gas bag restraint system shown in FIGS. 6 and 7 is as follows: By adjusting the vehicle seat 4, a force is introduced into the Bowden cable 37 or 38. This force causes the partial shaft 31 to rotate on its threaded sleeve 41, so that the partial shaft 31 shifts to the right or left from its central position shown in FIG. 7c. This position of the partial shaft 31 is maintained until the vehicle seat 4 is adjusted again. Accordingly, the adjustment of the seat 4 has no direct influence on the winding of the tethers on the partial shafts 30 and 32.
  • the tethers are 33 to 36 of their stocking device on the partial shafts 30 and 32 deducted. And so far, until the partial shaft 30 or 32 to the middle part of the shaft 31-abuts ab- described above.
  • the stop is damped by a damping ring 29 which is arranged in each case a partial shaft 30 or 32 and is arranged between the partial shaft 30 or 31 or 32.
  • FIGs 8 and 9 show an embodiment of the gas bag restraint system according to the invention, in which the winding shaft via a gear unit (44, 47-49) is particularly damped to prevent force peaks.
  • the winding shaft 6 '' in turn divided into two partial shafts 42 and 43, which are connected to each other via a damping device 44.
  • the two partial shafts 42 and 43 are analogous to those in the embodiment of Figures 6 and 7, but without internal thread.
  • the partial shafts 42 and 43 run on bearing bushes 45, wherein the partial shaft 43 in the case of a critical driving situation with the Storage device 46 can be coupled.
  • the storage device 46 is designed for storing Bowden cables.
  • the damping device 44 comprises a fixed on the gas generator 7 ring 47, project radially from the eight stub axles 48. On each of these stub axles 48, a damper wheel 49 is rotatably mounted.
  • each damping wheel 49 in teeth 50 of the partial shaft 43 and 42 With its teeth engages each damping wheel 49 in teeth 50 of the partial shaft 43 and 42, which are introduced into the respective corresponding end face.
  • the independently rotatable partial shafts 42 and 43 thus influence each other. For example, if the tethers 33 and 34 completely withdrawn, so that the rotational movement of the partial shaft 42 is stopped, this abrupt stop attenuated via the damping device 44 is transmitted to the partial shaft 43, so that here no force peaks can arise.
  • Figures 10 and 11 show a modified embodiment of the solution described in Figures 6 and 7.
  • the middle part shaft 31 ' is designed together with its threaded sleeve 41' such that gas can escape from the outlet openings 8 unhindered.
  • the partial shaft 31 'apertures 52 which are arranged similar to an impeller.
  • the thread of the threaded sleeve 41 ' is not completely circumferential but provided with recesses 53, in turn, openings 54 are introduced.
  • the openings 54 are in overlap with the gas outlet openings 8 of the gas generator. 7
  • Figures 12 and 13 show perspective views of an inventive gas bag restraint system with partial waves 55 and 56, the different winding diameters D have. This means that the tethers 33 and 34 wound on partial shaft 55 can enable a considerably longer deployment distance of the gas bag than the tethers 35 and 36 wound on the partial shaft 56.
  • the diameter of the tether 34 is kept smaller than the diameter of the tether 33rd
  • Figures 14, 15 and 16 show ways in which the winding shaft ensures a safe deployment of the gas bag in case of failure of the Bowden cable.
  • the winding shaft always occupies the 50% seat position automatically either in its rest position or in case of failure of the Bowden cable.
  • counter-rotating springs 60 and 61 can be provided on the partial shaft 31 which receives the Bowden cables 37 and 38.
  • the cradle springs 60 and 61 are fixed at one end to the split shaft 31 and at the other end to the fixed housing 9.
  • the coil springs cause, if no external forces through the Bowden cables 37 and 38 act on the partial shaft 31, an automatic positioning of the partial shaft 31 on its threaded sleeve.
  • a lock may be provided according to Figure 14, which is activated when the gas generator.
  • the lock 70 snaps with locking lugs 71 in the recesses provided in the 72 part shaft 31 and thus prevents them from rotating.
  • the Partial shafts 30 and 32 can thereby move unhindered on the partial shaft 31 and strike it.
  • the motor-driven stop 80 shown in FIG. 17 for the winding shafts 30 and 32 includes an eccentric 81, which is rotated in response to the desired stop position by a servomotor 82.
  • the eccentric 81 is connected via a gear 83 to the servo motor 82.
  • a housing 84 receives a bearing 85 for the gear 83.
  • either the left or the right winding shaft 30 or 32 can be further processed.
  • a servomotor 86 driving a stop 87 which is slidably held by a rack gear 88.
  • the tethers can be secured by means of a damping device 89 against force peaks.
  • the tethers are sewn so that when the burden of the retention of the gas bag fabric tears the seam and thus takes the force peaks of the attachment points of the tethers.
  • the fail-safe mechanism according to FIG. 20a shows a possibility, such as, for example, that the winding shaft 32 can be held in a 50% position with compensation of the force / torque-free region around the middle position (see FIG. 20b).
  • a pin 90 which is held by a spring 91 in the direction of the winding shaft under bias, causes the winding shaft 32 is always held in the 50% position, since it engages in a recess 92 of the winding shaft 32. Only by the Bowden cables, not shown here, the winding shaft 32 is rotated from its position. With the two opposite winding springs is brought in possibly defective Bowden cables the winding shaft in the safe working position (50% position).
  • Federktafttoleranzen typically up to 20%

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

L'invention vise à mettre en oeuvre un système de retenue à sac de gaz (1), comportant un sac de gaz (3), un générateur de gaz (2) et un dispositif de délimitation du sac de gaz délimitant la trajectoire de déploiement maximale du sac de gaz (3) en fonction de paramètres de charge d'occupants et permettant un déploiement efficace du sac de gaz (3). A cet effet, le système selon l'invention comporte un dispositif de distribution destiné à distribuer une bande de garde délimitant la trajectoire de déploiement du sac de gaz (3), et celui-ci est disposé en-dehors du sac de gaz (3).
PCT/EP2006/001386 2005-02-25 2006-02-16 Systeme de retenue a sac de gaz WO2006089670A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007556528A JP2008531364A (ja) 2005-02-25 2006-02-16 エアバッグ拘束システム

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE202005012244.0 2005-02-25
DE202005012244U DE202005012244U1 (de) 2005-02-25 2005-02-25 Gassack-Rückhaltesystem
DE102005048912.5 2005-10-10
DE102005048912A DE102005048912A1 (de) 2005-02-25 2005-10-10 Gassack-Rückhaltesystem

Publications (2)

Publication Number Publication Date
WO2006089670A2 true WO2006089670A2 (fr) 2006-08-31
WO2006089670A3 WO2006089670A3 (fr) 2007-01-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/001386 WO2006089670A2 (fr) 2005-02-25 2006-02-16 Systeme de retenue a sac de gaz

Country Status (3)

Country Link
JP (1) JP2008531364A (fr)
DE (1) DE102005048912A1 (fr)
WO (1) WO2006089670A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008008676A1 (de) 2008-02-12 2009-08-13 Trw Automotive Gmbh Gassackrückhaltevorrichtung für Insassen eines Kraftfahrzeugs

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009008733A1 (de) 2009-02-12 2009-10-15 Daimler Ag Rückhaltesystem für einen Kraftwagen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0943499A1 (fr) * 1998-03-17 1999-09-22 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Airbag avec bande de retenue
DE19837749A1 (de) * 1998-08-20 2000-03-02 Bsrs Restraint Syst Gmbh Airbagmodul mit Fangbändern
DE10020795A1 (de) * 1999-04-29 2000-11-30 Trw Repa Gmbh Gassack-Rückhaltesystem
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