WO2019201728A1 - Ensemble prétensionneur pour prétensionneur de ceinture et procédé de fabrication d'un ensemble prétensionneur - Google Patents

Ensemble prétensionneur pour prétensionneur de ceinture et procédé de fabrication d'un ensemble prétensionneur Download PDF

Info

Publication number
WO2019201728A1
WO2019201728A1 PCT/EP2019/059223 EP2019059223W WO2019201728A1 WO 2019201728 A1 WO2019201728 A1 WO 2019201728A1 EP 2019059223 W EP2019059223 W EP 2019059223W WO 2019201728 A1 WO2019201728 A1 WO 2019201728A1
Authority
WO
WIPO (PCT)
Prior art keywords
ignition unit
holder
tube
pretensioner
sleeve
Prior art date
Application number
PCT/EP2019/059223
Other languages
German (de)
English (en)
Inventor
Thomas Mödinger
Thomas Frech
Thomas Türp
Original Assignee
Trw Automotive Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Trw Automotive Gmbh filed Critical Trw Automotive Gmbh
Priority to CN201980026516.4A priority Critical patent/CN111989244A/zh
Publication of WO2019201728A1 publication Critical patent/WO2019201728A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/46—Reels with means to tension the belt in an emergency by forced winding up
    • B60R22/4628—Reels with means to tension the belt in an emergency by forced winding up characterised by fluid actuators, e.g. pyrotechnic gas generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/18—Anchoring devices
    • B60R22/195—Anchoring devices with means to tension the belt in an emergency, e.g. means of the through-anchor or splitted reel type
    • B60R22/1954—Anchoring devices with means to tension the belt in an emergency, e.g. means of the through-anchor or splitted reel type characterised by fluid actuators, e.g. pyrotechnic gas generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/26—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags characterised by the inflation fluid source or means to control inflation fluid flow
    • B60R2021/26029—Ignitors

Definitions

  • the present invention relates to a pretensioner assembly for a pretensioner and to a method of manufacturing a pretensioner assembly.
  • Belt tensioners in which, if necessary, activated in a tension tube mounted micro gas generator and a compressed gas is generated, are known.
  • the compressed gas is forwarded in a tension tube and drives, for example, a coupled to the shaft of a belt retractor turbine to collect a Gurtbandlose.
  • the micro gas generator must be mounted sufficiently pressure-tight in the tension tube.
  • the micro gas generator is usually welded to the tension tube.
  • Such StrafferbauIER are consuming in their production.
  • a Medferbaumate for a belt tensioner comprising a tensioning tube and an at least partially arranged in the tubing microgas generator having a holder, an ignition unit and a propellant charge container, which is filled with a propellant charge, wherein the tensioning tube has an abutment on the tension of the micro gas generator, and wherein the tensioning tube has a radially inwardly flared portion over which the micro gas generator is held in the tautening tube, and wherein the Micro gas generator is fitted, wherein the flanged portion of the Tightening tube is arranged in the waisted portion of the micro gas generator.
  • Such a pretensioner assembly has the advantage that the microgas generator is held reliably and sufficiently pressure-tight in the tensioning tube.
  • the tensioner assembly is simple and inexpensive to produce.
  • the tension tube can serve as a supporting component when triggering the micro gas generator. An effective diameter of the internal pipe pressure when triggering the micro gas generator is reduced, which in turn has an advantageous effect on the overpressure resistance.
  • the micro gas generator is positively fixed to the tensioning tube and can not be solved by this non-destructive.
  • the flanged portion of the tension tube between the ignition unit and the holder is arranged.
  • the holder can be made of plastic, since during the forming of the tension tube no high temperatures arise, as would be the case for example in a welding process.
  • the abutment against which the micro gas generator rests is formed at a distance from the free end of the tensioning tube, in particular by a tapering of the tube diameter.
  • the front end of the microgas generator located in the tensioning tube can rest against this abutment.
  • one end of the tensioning tube is flanged radially inward.
  • a flanged section at the end of the tension tube can be implemented more easily in terms of manufacturing technology.
  • the waist is formed for example by a conical section of the ignition unit.
  • the flanged portion of the tensioning tube may be flush with the conical portion.
  • the ignition unit is preferably connected to the holder.
  • the micro gas generator may be pre-assembled as an assembly. This facilitates handling during production.
  • the propellant charge container and the ignition unit with the holder can be present as separate components or assemblies before assembly in the tension tube.
  • the connection between the ignition unit and the holder can be produced during the crimping of the tensioning tube. In this way, the advantage is achieved that the holder is reliably connected to the Strafferbautechnik, with only a few manufacturing steps are required.
  • the ignition unit and the holder are connected by a sleeve which bears against a conical portion of the ignition unit.
  • the ignition unit and / or the holder can each be non-positively, positively connected or connected by means of an adhesive connection with the sleeve.
  • the sleeve is clamped to the conical portion of the ignition unit.
  • the sleeve preferably forms the propellant charge container. Thereby, the number of required components can be kept low, whereby the Strafferbauire can be produced inexpensively.
  • the sleeve has a radially inwardly directed circumferential embossing, which forms an abutment for the ignition unit.
  • the assembly in particular the positioning of the ignition unit in the sleeve is therefore particularly simple. The ignition unit can simply be pushed into the sleeve until it abuts the stamping.
  • an O-ring can rest against the embossing on an inner side of the sleeve.
  • the O-ring is in particular arranged between the embossing and the ignition unit.
  • retaining elements may be provided on the holder in order to connect the ignition unit to the holder.
  • the holding elements are for example latching elements which are connected to the ignition unit engage, in particular encompass a widened portion of the ignition unit and thereby fix the ignition unit form fit to the holder.
  • On a sleeve can be omitted in this embodiment.
  • a method for producing a pretensioner assembly for a belt tensioner comprising a tensioning tube and a microgas generator, wherein the microgas generator has a holder, an ignition unit and a propellant charge container which is filled with a propellant charge, comprising the following steps: a) the ignition unit is connected to the holder, b) the propellant charge container, the ignition unit and the holder are inserted into the tensioning tube, c) the tensioning tube is reshaped such that the microgas generator is held firmly in the tensioning tube.
  • step a) and step c) can take place simultaneously, wherein the ignition unit and the holder are connected by the forming of the tensioning tube.
  • FIG. 1 shows a pretensioner assembly 10 for a belt tensioner in a sectional representation.
  • the pretensioning assembly 10 comprises a tensioning tube 12 which carries gas in the event of activation and at least partially in the tensioning tube 12
  • the micro gas generator 14 has a holder 16, an ignition unit 18 and a propellant charge container 20, which is filled with a propellant charge 22, which produces compressed gas in the event of release.
  • the propellant charge container 20 is a sleeve 24, in particular made of a metal.
  • electrical contacts 17 are provided in the form of pins.
  • the sleeve 24 has a radially inwardly directed circumferential, in particular annular, embossing 26.
  • the embossment 26 forms an abutment for the ignition unit 18 and thus serves to position the ignition unit 18 in the sleeve 24.
  • For better sealing is located on the inside of the sleeve 24 an O-ring 28 on the embossment 26, in particular between the embossment 26 and the ignition unit 18th
  • the tension tube 12 has an abutment 30 against which the micro gas generator 14 abuts.
  • the abutment 30 is formed by a constriction in the tube diameter, wherein the diameter of the tensioning tube 12 at the location of the constriction is smaller than a diameter of the micro gas generator fourteenth
  • the tensioning tube 12 has a radially inwardly flared portion 32, specifically in a region in which the microgas generator 14 is fitted.
  • the tension tube 12 is flanged radially inward at one end.
  • the waisted portion of the micro gas generator 14 is located at a transition from the ignition unit 18 to the holder 16.
  • the ignition unit 18 has a conical portion 34 which tapers radially inward towards the holder 16 and thus forms the waisted region.
  • the holder 16 is in the embodiment shown in sections on the ignition unit 18, in particular on the conical portion 34 of the ignition unit 18 at.
  • the holder 16 has an at least partially circumferential collar 36 which widens in the longitudinal direction of the tensioning tube 12 at the same angle as the conical portion 34th
  • the holder 16 and the ignition unit 18 are connected to each other both by the sleeve 24 and by the flanged portion 32 of the tensioning tube 12.
  • the ignition unit 18 and the holder 16 are inserted into the tensioning tube 12.
  • the tension tube 12 is then deformed at its end, such that the flanged portion 32 is formed, which abuts against the conical portion 34 of the ignition unit 18, and the micro gas generator 14 is held firmly in the tension tube 12.
  • the sleeve 24 can be reshaped at the same time. Alternatively, however, the sleeve 24 may be reshaped prior to forming the tension tube 12, particularly before the micro gas generator is inserted into the tension tube, so that the micro gas generator 14 forms a preassembled assembly that is easy to handle.
  • FIG. 2 shows a further embodiment of a pretensioner assembly 10 according to the invention in a sectional view.
  • the sleeve 24 is extended and extends beyond the ignition unit 18 to one end of the holder 16, ie the sleeve 24 terminates flush with the holder 16.
  • the holder 16 can be fixed in a non-positive, positive fit or by gluing in the sleeve 24 and be connected in this way with the ignition unit 18.
  • FIG. 3 shows a further embodiment of a pretensioner assembly 10 according to the invention in a sectional view.
  • the sleeve 24 is open at both ends.
  • the sleeve 24 can thereby be prefabricated with the inner contour for receiving the ignition unit 18 and the holder 16.
  • the ignition unit 18 and the O-ring 28 are inserted from the front into the sleeve 24, in particular over the end of the sleeve 24, which is arranged in the tension tube 12 after assembly. Subsequently, the sleeve 24 is deformed from the outside, so that the ignition unit 18 is held in position and the micro gas generator 14 is sealed via the O-ring 28. Subsequently, the sleeve is filled with the propellant charge 22.
  • the sleeve 24 At the end of the sleeve 24 directed away from the holder 16, in particular at the end of the micro gas generator 14, which is arranged in the tensioning tube 12, the sleeve 24 is closed by a bursting bottom 38. When triggered, this breaking and compressed gas can flow through the tautening tube 12.
  • FIG. 4 shows a further embodiment of a pretensioner assembly 10 according to the invention in a sectional view.
  • the T reibladung 22 is filled in a separate, enclosed propellant container 20.
  • the propellant charge container 20 is inserted into the tensioning tube 12 before the assembly of the ignition unit 18 on the tensioning tube 12.
  • the sleeve 24 merely serves to connect the ignition unit 18 to the holder 16.
  • the contour of the sleeve 24 is adapted to the outer contour of the ignition unit 18 and of the holder 16.
  • the sleeve 24 surrounds the ignition unit 18 such that it is positively connected to the sleeve 24.
  • the end of the sleeve 24, which surrounds the ignition unit 18, formed radially inward.
  • the sleeve 24 can be largely prefabricated with the inner contour. After mounting the ignition unit 18 in the sleeve 24, the free end of the sleeve 24 is deformed to fix the ignition unit 18.
  • FIG. 5 shows a further embodiment of a pretensioner assembly 10 according to the invention in a sectional representation.
  • the holder 16 has holding members 40 for connecting the igniting unit 18 and the holder 16 to each other.
  • the holding elements 40 are in particular latching or clamping elements, which the Igniter unit 18 at least partially surround and thereby fix the ignition unit 18 positively on the holder 16.
  • On a sleeve can be omitted in this embodiment.
  • the holder 16 is for example a plastic injection-molded part, wherein the holding elements 40 are integrally formed with the holder 16

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Air Bags (AREA)

Abstract

L'invention concerne un ensemble prétensionneur (10) destiné à un prétensionneur de ceinture, comprenant un tube de tension (12) et au moins un micro-générateur de gaz (14) qui est agencé au moins en partie dans le tube de tension (12) et qui présente un support (16), une unité d'amorçage (18) et un réservoir (20) de charge propulsive qui est rempli d'une charge propulsive (22). Le tube de tension (12) présente un support de montage (30) sur lequel porte le micro-générateur de gaz (14), le tube de tension (12) présente une section (32) retournée radialement vers l'intérieur par laquelle le micro-générateur de gaz (14) est maintenu dans le tube de tension (12), et le micro-générateur de gaz (14) est cintré. La section (32) retournée du tube de tension (12) est agencée dans la partie cintrée du micro-générateur de gaz (14). L'invention concerne par ailleurs un procédé de fabrication d'un ensemble prétensionneur.
PCT/EP2019/059223 2018-04-16 2019-04-11 Ensemble prétensionneur pour prétensionneur de ceinture et procédé de fabrication d'un ensemble prétensionneur WO2019201728A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201980026516.4A CN111989244A (zh) 2018-04-16 2019-04-11 用于带张紧器的张紧器组件和制造张紧器组件的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018108994.5A DE102018108994A1 (de) 2018-04-16 2018-04-16 Strafferbaugruppe für einen Gurtstraffer und Verfahren zum Herstellen einer Strafferbaugruppe
DE102018108994.5 2018-04-16

Publications (1)

Publication Number Publication Date
WO2019201728A1 true WO2019201728A1 (fr) 2019-10-24

Family

ID=66597520

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/059223 WO2019201728A1 (fr) 2018-04-16 2019-04-11 Ensemble prétensionneur pour prétensionneur de ceinture et procédé de fabrication d'un ensemble prétensionneur

Country Status (3)

Country Link
CN (1) CN111989244A (fr)
DE (1) DE102018108994A1 (fr)
WO (1) WO2019201728A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4289685A1 (fr) * 2022-06-08 2023-12-13 Autoliv Development AB Dispositif de sécurité dans un véhicule
EP4289682A1 (fr) * 2022-06-08 2023-12-13 Autoliv Development AB Dispositif de sécurité dans un véhicule
EP4289684A1 (fr) * 2022-06-08 2023-12-13 Autoliv Development AB Dispositif de sécurité dans un véhicule
EP4289681A1 (fr) * 2022-06-08 2023-12-13 Autoliv Development AB Dispositif de sécurité dans un véhicule

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT5978U1 (de) * 2002-03-08 2003-02-25 Hirtenberger Automotive Safety Pyrotechnischer gasgenerator
GB2399139A (en) * 2003-03-06 2004-09-08 Autoliv Dev Releasable safety clip
EP2196362A1 (fr) * 2007-07-06 2010-06-16 Autoliv Development Ab Prétendeur et son procédé de fabrication
DE202013104757U1 (de) * 2012-10-24 2013-11-21 Hirtenberger Automotive Safety Gmbh & Co. Kg Auslösevorrichtung für einen Gurtstraffer
WO2014079587A1 (fr) * 2012-11-26 2014-05-30 Trw Automotive Gmbh Prétensionneur de ceinture pour système de retenue des occupants d'un véhicule

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT513494B1 (de) * 2012-10-24 2014-05-15 Hirtenberger Automotive Safety Gmbh & Co Kg Auslösevorrichtung für einen Gurtstraffer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT5978U1 (de) * 2002-03-08 2003-02-25 Hirtenberger Automotive Safety Pyrotechnischer gasgenerator
GB2399139A (en) * 2003-03-06 2004-09-08 Autoliv Dev Releasable safety clip
EP2196362A1 (fr) * 2007-07-06 2010-06-16 Autoliv Development Ab Prétendeur et son procédé de fabrication
DE202013104757U1 (de) * 2012-10-24 2013-11-21 Hirtenberger Automotive Safety Gmbh & Co. Kg Auslösevorrichtung für einen Gurtstraffer
WO2014079587A1 (fr) * 2012-11-26 2014-05-30 Trw Automotive Gmbh Prétensionneur de ceinture pour système de retenue des occupants d'un véhicule

Also Published As

Publication number Publication date
CN111989244A (zh) 2020-11-24
DE102018108994A1 (de) 2019-10-17

Similar Documents

Publication Publication Date Title
WO2019201728A1 (fr) Ensemble prétensionneur pour prétensionneur de ceinture et procédé de fabrication d'un ensemble prétensionneur
DE3425836A1 (de) Gasgenerator
WO2007065715A1 (fr) Unite d'actionnement pyrotechnique, son procede de production, et module de poche a gaz pourvu d'une unite d'actionnement de ce type
DE102012023031B4 (de) Gurtstraffer für ein Fahrzeuginsassen-Rückhaltesystem
DE102015209252B4 (de) Strafferantrieb für eine Sicherheitsgurteinrichtung
DE10327837A1 (de) Gurtstraffer
DE102010006715B4 (de) Gehäusetopf zur Aufnahme eines Filterelementes in einer Filtereinrichtung
DE102016104834A1 (de) Schlauchschelle
EP2915973B1 (fr) Agencement trémie-tube
DE19540040A1 (de) Hydraulikaggregat, insbesondere für eine schlupfgeregelte Fahrzeugbremsanlage und Verfahren zu dessen Herstellung
EP3681765B1 (fr) Générateur à gaz
DE102013110810B4 (de) Gasgenerator für ein Airbagmodul
EP0852192A1 (fr) Module de coussin gonflable
DE102009012364B4 (de) Baugruppe mit einem Gasgenerator
DE10033319A1 (de) Kupplung für einen metallischen Gasgenerator
DE102008004969A1 (de) Gurtaufroller mit Strafferantrieb
EP3615388B1 (fr) Support d'allumeur, module, générateur de gaz ainsi que procédé de fabrication d'un générateur de gaz
EP0782484B1 (fr) Procede pour lier une insertion a une piece tubulaire par sertissage
WO2011066909A1 (fr) Dispositif tendeur pour ceinture de sécurité
DE19857445B4 (de) Verfahren zur Herstellung eines luftspaltisolierten Abgasrohres
AT525076B1 (de) Pyrotechnischer Aktuator
DE4435466A1 (de) Verfahren zur Herstellung einer Verbindung eines Einsatzteils mit einem rohrartigen Teil mittels Bördelung
DE10021809C1 (de) Fügeverbindung eines Rohres in einem Flansch
WO2022248382A1 (fr) Micro-générateur de gaz et procédé de fabrication d'un micro-générateur de gaz
DE10319714A1 (de) Gurtstraffer an einem Kraftfahrzeug

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19725030

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 19725030

Country of ref document: EP

Kind code of ref document: A1