WO2012065655A1 - Strafferrohr für einen gurtstraffer - Google Patents
Strafferrohr für einen gurtstraffer Download PDFInfo
- Publication number
- WO2012065655A1 WO2012065655A1 PCT/EP2011/004025 EP2011004025W WO2012065655A1 WO 2012065655 A1 WO2012065655 A1 WO 2012065655A1 EP 2011004025 W EP2011004025 W EP 2011004025W WO 2012065655 A1 WO2012065655 A1 WO 2012065655A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tensioner
- tube
- transmission element
- tensioner tube
- belt
- Prior art date
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
- B60R22/34—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
- B60R2022/4642—Reels with means to tension the belt in an emergency by forced winding up characterised by fluid actuators, e.g. pyrotechnic gas generators the gas directly propelling a flexible driving means, e.g. a plurality of successive masses, in a tubular chamber
Definitions
- the invention relates to a tensioner tube for guiding a power transmission element for a belt tensioner.
- the invention further relates to a belt tensioner for a safety belt system with such a tensioner tube.
- a belt tensioner is used to reduce in a case of restraint influences that may adversely affect the restraint of the vehicle occupant before the forward displacement of the vehicle occupant and possibly the use of a force limiter begin. These influences include the so-called Filmspul mono (loosely on the belt reel rolled up webbing) and the beltless (not tight against the vehicle occupant webbing).
- the belt tensioner reduces belt slack and the film spooling effect within a very short time by tautening the belt. The vehicle occupant can thus participate early in the vehicle deceleration, and the conditions for the subsequent use of the force limiter are optimized.
- rupture protection prevents under unfavorable circumstances possible emergence of excessive pressure, which can lead to a bursting (bursting, breaking, rising) of the tightener.
- Known rupture fuses either have a separate element (eg rupture disk, rivet, clip, spring element, thread), or they are formed as embossing, predetermined breaking point or the like.
- a belt tensioner for a safety belt system with a drive unit and a force transmission element which engages upon activation of the drive unit on a rotatably mounted drive wheel, which is coupled to the axis of a belt retractor or coupled.
- the power transmission element is guided in a space-constrained torture tube and consists of a substantially deformable material, so that the drive wheel takes place a damped Ein facedung the power transmission element and a high torque transmission is ensured.
- the object of the invention is to optimize the pressure reduction at the end of the tightening process in a belt tensioner, in particular in a belt tensioner of the type known from DE 10 2006 031 359 A1.
- the tensioner according to the invention for guiding a power transmission element for a belt tensioner comprises a first open end which is provided for coupling to a pyrotechnic drive means, and a second open end which is aligned with a drive wheel of the belt tensioner or provided for directing to a drive wheel of the belt tensioner is. At least one outflow opening is arranged in the vicinity of the second end.
- An arrangement "near the second end" is to be understood, with reference to the longitudinal extension of the tightening tube, an arrangement in the half of the tightening tube facing the second end, preferably an arrangement in the third facing the second end, more preferably in the said second end second end facing quarters of the Strafferrohrs to understand.
- the invention is based on the recognition that the tensioning performance can be influenced in a targeted manner by a suitable arrangement of one or more outflow openings in the tensioner tube.
- the outflow openings allow a controlled distribution of the outflow energy (reduction of pressure force peaks) and a reduction of the sound pressure acting on the vehicle occupants during a tightening process.
- discharge opening is formed in the tensioner tube and preferably permanently open ,
- the outflow opening can also be sealed in such a way that it is already released under pressure conditions such as occur during a normal tightening process (ie not at excessively high pressure). At pressures well below the magnitude occurring during a normal tightening process, however, the outflow opening remains sealed. This is the case in particular in the non-activated case of the belt tensioner, ie in normal driving. According to the preferred embodiment of the invention, no further openings are provided in the tensioner tube or in its wall, apart from the or the outflow openings, so that an efficient feed of the force transmission element is ensured by the pressure gas generated by the pyrotechnic drive unit.
- the inventively provided outflow opening in the tensioner tube can in particular have the shape of a slot, an oval, a circle or a triangle.
- a plurality of outflow openings are provided, which are arranged one behind the other in the longitudinal direction of the tensioner tube.
- An alternative embodiment provides that a plurality of outflow openings are provided, which, with respect to the longitudinal direction of the tightening tube, are arranged next to one another.
- outflow openings which have substantially the same shape, or at least partially, different shapes.
- the invention also provides a belt tensioner for a safety belt system with a pyrotechnically movable power transmission element and a driven by the movable power transmission element driving wheel.
- the power transmission element is guided in a tensioner tube according to the invention.
- the invention provided discharge opening is not located in the region of the first end of the tensioner tube, so that in Strafferrohr between a pyrotechnic drive unit and the power transmission element is formed a closed pressure chamber.
- FIG. 1 is an exploded view of a belt retractor with a belt tensioner according to the invention
- FIG. 1 is a sectional view of the assembled belt retractor
- FIG. 3 is a perspective view of a tensioner tube according to the invention according to a first embodiment
- FIG. 4 is a perspective view of a tensioner tube according to the invention according to a second embodiment
- - Figure 5 is a perspective view of a tensioner tube according to the invention according to a third embodiment
- - Figure 6 is a perspective view of a tensioner tube according to a fourth embodiment of the invention
- FIG. 7 is a perspective view of a tensioner tube according to a fifth embodiment of the invention.
- FIG. 8 is a perspective view of a tensioner tube according to a sixth embodiment of the invention.
- FIG. 1 shows the essential components of a belt retractor with a pyrotechnically driven belt tensioner.
- FIG. 2 shows the belt retractor in the assembled state.
- a belt spool 12 is rotatably mounted, rolled up on the webbing or can be deducted from the webbing.
- drive wheel 14 is rotatably mounted with an external toothing or with turbine blades.
- the belt tensioner of the belt retractor has a pyrotechnic drive unit with an igniter 16 and a power transmission element 20 displaceably arranged in a tensioner tube 18.
- the components of the belt tensioner are at least partially housed in a tensioner housing 22 which is secured to the retractor frame 10.
- a thrust washer 24 On the drive wheel 14 are still a thrust washer 24, arranged therein a coil spring 26 and a cover 28 is placed. These components form a so-called spring side of the belt retractor, which is not important for the function of the belt tensioner.
- FIG. 3 shows a first embodiment of the tensioner tube 18.
- the tensioner tube 18 has a first open end 30 which is fixedly connected to the pyrotechnic drive unit.
- the second open end 32 of the tensioner tube 18 opens directly adjacent to the drive wheel 14, d. H. the second end 32 is directed to the drive wheel 14.
- the power transmission element 20 is slidably disposed. Between the pyrotechnic drive unit and the power transmission element 20 a closed pressure chamber is formed in Strafferrohr.
- one or more outflow openings 34 are provided, which establish a flow connection between the tube interior and the environment.
- the outflow openings 34 are, based on the length of the tensioner tube 18, arranged in the rear end of the tensioner tube 18 facing the second end 32. More specifically, the discharge openings 34 in the rear third, more specifically in the rear quarter of the tensioner tube 18 are arranged. In the embodiment shown in Figure 3, the discharge openings 34 are designed as two slots, which are arranged one behind the other in the longitudinal direction of the tensioner tube 18. Otherwise, the tensioner tube 18 or its wall has no further openings.
- the pyrotechnic drive unit is activated and generates a pressurized gas which expands in the pressure chamber located between the drive unit and the force transmission element 20.
- the force transmission element 20 is pressurized in the tensioner tube 18, so that the force transmission element 20 is moved away from the igniter 16.
- the power transmission member 20 exits the tensioner tube 18 through the second end 32 and engages the drive wheel 14.
- the drive wheel 14 is set in a rotational movement.
- the drive wheel 14 in turn puts the belt spool 12 coupled to the drive wheel 14 in a rotational movement in Gurtbandaufwickelides, and it is rolled up webbing on the belt reel 12.
- part of the air pushed in front of the force transmission element 20 can escape via the outflow openings 34 from the tensioner tube 18.
- the pressurized gas trapped between the drive unit and the force transmission element 20 can then flow out of the tensioner tube 18 via the outflow openings 34.
- the outflow openings 34 are permanently open, so are released not only at an excessive pressure, as it can occur, for example, with blocked drive wheel 14 or unwanted activation of the pyrotechnic drive unit by overheating.
- the discharge ports 34 may be sealed so that they are released immediately even under pressure conditions such as occur during a normal tightening process (without significant complications).
- the number, shape, size and position of the outflow openings thus have a specific influence on the tensioning power, on the distribution of the outflow energy (reduction of pressure force peaks) and on the force limitation. Likewise, these parameters, depending on the arrangement and nature of the surrounding components contribute to influencing the perceivable for the vehicle occupant sound pressure.
- FIGS. 4 to 8 show further embodiments of the tensioner tube 18, which differ only in the outflow openings 34 from the first embodiment shown in FIG.
- only one outflow opening 34 is provided which is designed as a slot.
- the fourth embodiment according to FIG. 6 essentially corresponds to the third embodiment, except that here the slot is made narrower.
- three slots are arranged side by side (distributed in the circumferential direction of the tensioner tube 18) as outflow openings 34.
- three slots are provided similarly to the fifth embodiment, but they are arranged obliquely to the longitudinal direction of the tensioner tube 18.
- outflow 34 there are also other shapes and arrangements of outflow 34 possible, in particular also forms based on polygons (triangles, squares, etc.) and ovals.
- the number and shape composition of the outflow openings 34 can also be varied in order to adapt the outflow behavior to specific requirements.
- the outflow opening (s) 34 can also be introduced with suitable geometry held in the bending region before bending.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automotive Seat Belt Assembly (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112011103805.4T DE112011103805B4 (de) | 2010-11-17 | 2011-08-11 | Strafferrohr für einen gurtstraffer |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010051420.9 | 2010-11-17 | ||
DE102010051420A DE102010051420A1 (de) | 2010-11-17 | 2010-11-17 | Strafferrohr für einen Gurtstraffer |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012065655A1 true WO2012065655A1 (de) | 2012-05-24 |
Family
ID=44653234
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2011/004025 WO2012065655A1 (de) | 2010-11-17 | 2011-08-11 | Strafferrohr für einen gurtstraffer |
Country Status (2)
Country | Link |
---|---|
DE (2) | DE102010051420A1 (de) |
WO (1) | WO2012065655A1 (de) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013210766A1 (de) * | 2013-06-10 | 2014-12-11 | Takata AG | Strafferantrieb für eine Sicherheitsgurteinrichtung |
US9475455B2 (en) | 2014-05-23 | 2016-10-25 | Autoliv Asp, Inc. | Retractor pretensioner assembly |
US9555768B2 (en) | 2014-05-23 | 2017-01-31 | Autoliv Asp, Inc. | Retractor pretensioner assembly |
US9744940B1 (en) | 2016-04-13 | 2017-08-29 | Autoliv Asp, Inc. | Seatbelt pretensioning retractor assembly |
US10011246B2 (en) | 2013-11-08 | 2018-07-03 | Trw Automotive Gmbh | Belt tensioner for a safety belt system |
US10259426B2 (en) | 2017-03-17 | 2019-04-16 | Autoliv Asp, Inc. | Seatbelt pretensioning retractor assembly including a piston-safety valve member |
US10328895B2 (en) | 2017-03-17 | 2019-06-25 | Autoliv Asp, Inc. | Seatbelt pretensioning retractor assembly including a pretensioner rod |
US10369963B2 (en) | 2017-03-17 | 2019-08-06 | Autoliv Asp, Inc. | Seatbelt pretensioning retractor assembly including a gas release opening |
CN111605511A (zh) * | 2019-02-25 | 2020-09-01 | 奥托立夫Asp公司 | 卷收器预紧器组件 |
US10864886B2 (en) | 2019-02-22 | 2020-12-15 | Autoliv Asp, Inc. | Retractor pretensioner assembly |
US11059452B2 (en) | 2017-03-17 | 2021-07-13 | Autoliv Asp, Inc. | Seatbelt pretensioning retractor assembly including a gas release opening |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012023031B4 (de) | 2012-11-26 | 2023-02-23 | Zf Automotive Germany Gmbh | Gurtstraffer für ein Fahrzeuginsassen-Rückhaltesystem |
EP3254908B1 (de) | 2016-06-06 | 2019-11-13 | TRW Automotive GmbH | Gurtaufroller für ein fahrzeugsicherheitsgurtsystem und verfahren zur verwendung solch eines gurtaufrollers |
EP3254907A1 (de) | 2016-06-06 | 2017-12-13 | TRW Automotive GmbH | Gurtaufroller für ein fahrzeugsicherheitsgurtsystem und verfahren zur verwendung solch eines gurtaufrollers |
EP3254910B1 (de) | 2016-06-06 | 2019-12-11 | TRW Automotive GmbH | Gurtaufroller für ein fahrzeugsicherheitsgurtsystem |
EP3254909B1 (de) | 2016-06-06 | 2019-09-11 | TRW Automotive GmbH | Gurtaufroller für ein fahrzeugsicherheitsgurtsystem |
DE102019132066A1 (de) * | 2019-11-27 | 2021-05-27 | Zf Automotive Germany Gmbh | Strafferrohr für einen Gurtstraffer |
DE102019133141A1 (de) * | 2019-12-05 | 2021-06-10 | Zf Automotive Germany Gmbh | Strafferrohr für einen Gurtstraffer |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5364129A (en) * | 1993-10-26 | 1994-11-15 | General Safety Corporation | Vehicle safety belt tensioning mechanism |
US5397075A (en) * | 1993-09-10 | 1995-03-14 | Automotive Systems Laboratory, Inc. | Seat belt pretensioner |
DE10317192A1 (de) * | 2003-04-15 | 2004-12-23 | Autoliv Development Ab | Gurtstraffer mit leisem Überdruckventil |
US20050156073A1 (en) * | 2004-01-16 | 2005-07-21 | Trw Automotive Gmbh | Belt tensioner for a safety belt retractor |
DE202006014487U1 (de) * | 2006-04-03 | 2007-01-11 | Trw Automotive Gmbh | Gurtstraffer für ein Sicherheitsgurtsystem |
DE102006031359A1 (de) | 2006-04-03 | 2007-10-04 | Trw Automotive Gmbh | Gurtstraffer für ein Sicherheitsgurtsystem |
DE102009040690A1 (de) * | 2009-09-04 | 2010-04-15 | Takata-Petri Ag | Insassenschutzvorrichtung mit Sicherheitsventil |
-
2010
- 2010-11-17 DE DE102010051420A patent/DE102010051420A1/de not_active Withdrawn
-
2011
- 2011-08-11 DE DE112011103805.4T patent/DE112011103805B4/de active Active
- 2011-08-11 WO PCT/EP2011/004025 patent/WO2012065655A1/de active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5397075A (en) * | 1993-09-10 | 1995-03-14 | Automotive Systems Laboratory, Inc. | Seat belt pretensioner |
US5364129A (en) * | 1993-10-26 | 1994-11-15 | General Safety Corporation | Vehicle safety belt tensioning mechanism |
DE10317192A1 (de) * | 2003-04-15 | 2004-12-23 | Autoliv Development Ab | Gurtstraffer mit leisem Überdruckventil |
US20050156073A1 (en) * | 2004-01-16 | 2005-07-21 | Trw Automotive Gmbh | Belt tensioner for a safety belt retractor |
DE202006014487U1 (de) * | 2006-04-03 | 2007-01-11 | Trw Automotive Gmbh | Gurtstraffer für ein Sicherheitsgurtsystem |
DE102006031359A1 (de) | 2006-04-03 | 2007-10-04 | Trw Automotive Gmbh | Gurtstraffer für ein Sicherheitsgurtsystem |
DE102009040690A1 (de) * | 2009-09-04 | 2010-04-15 | Takata-Petri Ag | Insassenschutzvorrichtung mit Sicherheitsventil |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013210766A1 (de) * | 2013-06-10 | 2014-12-11 | Takata AG | Strafferantrieb für eine Sicherheitsgurteinrichtung |
US9463772B2 (en) | 2013-06-10 | 2016-10-11 | Takata AG | Tensioning drive for a safety belt device |
DE102013210766B4 (de) * | 2013-06-10 | 2017-07-13 | Takata AG | Strafferantrieb für eine Sicherheitsgurteinrichtung |
US10011246B2 (en) | 2013-11-08 | 2018-07-03 | Trw Automotive Gmbh | Belt tensioner for a safety belt system |
US9475455B2 (en) | 2014-05-23 | 2016-10-25 | Autoliv Asp, Inc. | Retractor pretensioner assembly |
US9555768B2 (en) | 2014-05-23 | 2017-01-31 | Autoliv Asp, Inc. | Retractor pretensioner assembly |
US9744940B1 (en) | 2016-04-13 | 2017-08-29 | Autoliv Asp, Inc. | Seatbelt pretensioning retractor assembly |
US10328895B2 (en) | 2017-03-17 | 2019-06-25 | Autoliv Asp, Inc. | Seatbelt pretensioning retractor assembly including a pretensioner rod |
US10259426B2 (en) | 2017-03-17 | 2019-04-16 | Autoliv Asp, Inc. | Seatbelt pretensioning retractor assembly including a piston-safety valve member |
US10369963B2 (en) | 2017-03-17 | 2019-08-06 | Autoliv Asp, Inc. | Seatbelt pretensioning retractor assembly including a gas release opening |
CN110546044A (zh) * | 2017-03-17 | 2019-12-06 | 奥托立夫Asp公司 | 包括气体释放开口的安全带预紧式卷收器组件 |
US11059452B2 (en) | 2017-03-17 | 2021-07-13 | Autoliv Asp, Inc. | Seatbelt pretensioning retractor assembly including a gas release opening |
US11242030B2 (en) | 2017-03-17 | 2022-02-08 | Autoliv Asp, Inc. | Seatbelt pretensioning retractor assembly including a pretensioner rod |
US10864886B2 (en) | 2019-02-22 | 2020-12-15 | Autoliv Asp, Inc. | Retractor pretensioner assembly |
CN111605511A (zh) * | 2019-02-25 | 2020-09-01 | 奥托立夫Asp公司 | 卷收器预紧器组件 |
US10946831B2 (en) | 2019-02-25 | 2021-03-16 | Autoliv Asp, Inc. | Retractor pretensioner assembly |
Also Published As
Publication number | Publication date |
---|---|
DE102010051420A1 (de) | 2012-05-24 |
DE112011103805A5 (de) | 2013-08-14 |
DE112011103805B4 (de) | 2017-03-09 |
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