WO2012156019A1 - Appareil de limitation de force destiné à un véhicule et enrouleur de ceinture - Google Patents

Appareil de limitation de force destiné à un véhicule et enrouleur de ceinture Download PDF

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Publication number
WO2012156019A1
WO2012156019A1 PCT/EP2012/001728 EP2012001728W WO2012156019A1 WO 2012156019 A1 WO2012156019 A1 WO 2012156019A1 EP 2012001728 W EP2012001728 W EP 2012001728W WO 2012156019 A1 WO2012156019 A1 WO 2012156019A1
Authority
WO
WIPO (PCT)
Prior art keywords
limiting device
force limiting
movement
retractor
belt
Prior art date
Application number
PCT/EP2012/001728
Other languages
German (de)
English (en)
Inventor
Klaus-Peter Singer
Ronald Jabusch
Original Assignee
Autoliv Development Ab
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 Autoliv Development Ab filed Critical Autoliv Development Ab
Publication of WO2012156019A1 publication Critical patent/WO2012156019A1/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
    • B60R22/341—Belt retractors, e.g. reels comprising energy-absorbing means
    • B60R22/3413—Belt retractors, e.g. reels comprising energy-absorbing means operating between belt reel and retractor frame
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D7/00—Slip couplings, e.g. slipping on overload, for absorbing shock
    • F16D7/04—Slip couplings, e.g. slipping on overload, for absorbing shock of the ratchet type
    • F16D7/042—Slip couplings, e.g. slipping on overload, for absorbing shock of the ratchet type with at least one part moving axially between engagement and disengagement
    • F16D7/044—Slip couplings, e.g. slipping on overload, for absorbing shock of the ratchet type with at least one part moving axially between engagement and disengagement the axially moving part being coaxial with the rotation, e.g. a gear with face teeth
    • 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
    • B60R22/28—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices
    • B60R2022/288—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices with means to adjust or regulate the amount of energy to be absorbed

Definitions

  • the invention relates to a force limiting device for a motor vehicle and a belt retractor having the features of one of the preambles of one of claims 1 or 8.
  • WO 2006/108451 Al e.g. a speed-controlled Kraftbegrerizungs adopted for a belt retractor, which has a plurality of arranged on the frame of the belt retractor, to be vibrated masses.
  • the masses are rotatably mounted on the retractor frame and engage during the force-limited belt webbing alternately with two teeth in a toothed ring connected to the belt shaft.
  • the belt retractor due to the arranged on the retractor vibrating masses consuming in the production and expensive.
  • the belt retractor requires due to the oscillating masses a relatively large amount of space.
  • German patent application 10 2008 049 931.5 a further developed, based on the same physical principle working force limiting device is described in which two parts are moved with the teeth force-limited to each other and one of the parts doing a wavy feed motion, in which the gears alternately in Engaging and disengaging.
  • the oscillating masses are replaced by the part which carries out the wavelike feed motion, so that the force limiting device described therein requires a considerably smaller installation space. and has a much simpler structure.
  • the wavy feed movement exporting part is realized by a toothed disc, which is non-positively connected to the belt shaft.
  • the level of the force limiting device is given by the kinetic energy of the occupant to be degraded during the forward displacement automatically, the basic characteristic being determined by the parameters of the gear disc, such as e.g. the number of teeth, the tooth spacing or the mass of the toothed disc, is fixed.
  • a disadvantage of these force limiting devices is that the basic characteristic of the force limitation curve of the finished force limiting device is fixed once because of the parameters that are no longer to be changed. In certain applications, however, it may be necessary to subsequently adapt the basic characteristic of the force limitation curve of the force limiting device to the motor vehicle individually. Since this is not possible with a generic force limiting device, the force limiting device must be adapted individually in the design according to the vehicle-specific requirements. Furthermore, it is not possible to fine-tune the basic characteristic of the force limitation curve to the type of occupant to be detained and the accident situation.
  • the object of the invention is to provide a generic force limiting device in which the basic characteristic of the force limiting curve can be subsequently changed with the simplest possible means.
  • a force limiting device according to the invention with the features of claim 1 is proposed. Further preferred embodiments of the invention are given in the dependent claims the figures and the associated description.
  • a device for changing the engagement depth of the toothings is provided on the force limiting device.
  • the degree of overlapping of the teeth during the intervention can be changed, by which the destroyed in the Kraftbegrenzungs- device destroyed energy and thus the force limiting level with. Furthermore, the transverse movement portion of the undulating feed movement can thereby be changed, which forms a decisive proportion of the feed movement.
  • the feed movement and thus the belt pull-out speed can be changed during the activation of the force limiting device, in such a way that the belt pull-out speed decreases as the engagement depth increases and increases as the engagement depth is reduced.
  • the force limiting device can thereby be adapted to the individual motor vehicle or the individual installation location even after assembly, that the force limiting characteristic of a for the installation or the
  • Motor vehicle corresponds to optimal or predetermined force limiting characteristic.
  • the force limiting device can initially be produced uniformly in large numbers and can only be subsequently adapted to the individual use. From experiments it has been found that a particularly effective change of the force limiting characteristic can be achieved if the depth of engagement in the range of 0.2 to 0.7 times the tooth depth of the teeth can be changed.
  • the device is set up to change the engagement depth of the teeth during activation of the force limiting device.
  • the force limiting characteristic can also be changed during activation, so that in particular non - linear force limiting profiles can be realized. This can e.g. in the case of force limiting devices in belt - wounders, progressive or degressive force - limiting processes should be implemented in which the force - limiting level is to rise or fall abruptly.
  • the device comprises an externally controllable actuator. Due to the externally controllable actuator, the force limiting characteristic can be active, i. also depending on the situation, be changed.
  • the actuator can be controlled by a driver assistance system.
  • Driver assistance systems are understood to be systems which determine critical conditions from signals relating to vehicle dynamics and parameters relating to the vehicle environment, such as the distances to vehicles in front or other obstacles, as a result of which measures to increase occupant safety can be taken at an early stage. Since these signals are available early before the actual accident situation occurs, can the power limiting device thereby already be adjusted so far before the accident in each case in the force limiting characteristic that it has an ideal for a subsequent accident accidental force limiting characteristic.
  • the device comprises an actuating part which rests on one of the parts via a ramp contour and is adapted to carry out a relative movement to the part for changing the engagement depth of the teeth. Due to the ramp contour, the adjusting movement and the actuating direction of the actuating part can be directed differently, so that both directions can be ideally designed for handling and the force effect. Furthermore, a kind of translation can be created by the ramp contour, by means of which e.g. a small actuating force is converted in a large actuating travel in a large adjusting force at a small displacement of the toothed part.
  • FIG. 8 shows a detail of a belt retractor with a force limiting device after actuation of the actuating element in an oblique view
  • the actuator 16 may also include a pyrotechnic propellant, a pressure medium source or an electromechanical adjustment, the piezo stack is particularly advantageous in that it is particularly well controlled, ie it can be realized very precise adjustment with large adjustment forces.
  • the same retractor frame 3 can be seen, in which the part 5 has been removed.
  • the part 5 and the actuating part 6 are shown as individual parts.
  • a plurality of annularly arranged ramps 7 and 9 are respectively provided on the axial sides, which each form a ramp contour, with which the part 5 and the actuating part 6 abut one another.
  • the ramps 9 on the part 5 and the ramps 7 on the actuating part 6 each have an identical pitch and are directed opposite, so that in the abutment of the part 5 on the actuating part 6 a parallel alignment of the part 5 to the actuating part. 6 enable.
  • FIGS. 5 and 6 each show a sectional view in a sectional plane through the force limiting device with two different positions of the part 5.

Landscapes

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

Abstract

L'invention concerne un appareil de limitation de force (4) destiné à un véhicule. Cet appareil de limitation de force (4) comporte au moins deux parties (5, 11) actionnées l'une par rapport à l'autre avec un mouvement défini en fonction de la fréquence. Les parties (5, 11) mobiles l'une par rapport à l'autre présentent des dentures (10, 18) s'engrenant l'une dans l'autre, et le mouvement commandé en fonction de la fréquence se produit de telle sorte qu'au moins l'une des parties (5,11) effectue, par rapport à l'autre partie (5, 11), un mouvement d'avance (V) présentant un mouvement ondulatoire (Q) orienté perpendiculairement au mouvement d'avance (V). Dans le mouvement ondulatoire (Q), les dentures (10, 18) effectuent en alternance un engrènement et un désengrènement. Un dispositif de modification de la profondeur d'engrènement (T) des dentures (10, 18) est situé sur l'appareil de limitation de force (4).
PCT/EP2012/001728 2011-05-13 2012-04-21 Appareil de limitation de force destiné à un véhicule et enrouleur de ceinture WO2012156019A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011101517.9A DE102011101517B4 (de) 2011-05-13 2011-05-13 Kraftbegrenzungseinrichtung für ein Kraftfahrzeug und Gurtaufroller
DE102011101517.9 2011-05-13

Publications (1)

Publication Number Publication Date
WO2012156019A1 true WO2012156019A1 (fr) 2012-11-22

Family

ID=46001139

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/001728 WO2012156019A1 (fr) 2011-05-13 2012-04-21 Appareil de limitation de force destiné à un véhicule et enrouleur de ceinture

Country Status (2)

Country Link
DE (1) DE102011101517B4 (fr)
WO (1) WO2012156019A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10046731B2 (en) 2014-03-12 2018-08-14 Joyson Safety Systems Japan K.K. Energy absorption apparatus, seatbelt retractor, and seatbelt apparatus
US10099652B2 (en) 2014-12-12 2018-10-16 Joyson Safety Systems Japan K.K. Energy absorbing device, seat belt retractor and seat belt device
US10173638B2 (en) 2014-03-12 2019-01-08 Joyson Safety Systems Japan K.K. Energy absorbing device, seat belt retractor and seat belt apparatus
US10189439B2 (en) 2014-06-27 2019-01-29 Joysoft Safety Systems Japan K.K. Seat belt retractor and seat belt device
US10207673B2 (en) 2014-06-10 2019-02-19 Joyson Safety Systems Japan K.K. Seat belt retractor and seat belt device
US10300883B2 (en) 2014-09-22 2019-05-28 Joyson Safety Systems Japan K.K. Pretensioner, retractor, and seat belt device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11577685B2 (en) * 2020-06-03 2023-02-14 Jean Alain van Poppel Adaptive load-limiting seatbelt assembly

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060022447A1 (en) * 2004-07-29 2006-02-02 Kenneth Kohlndorfer Multilevel load limiting retractor with dual shifting mode
DE102004048455A1 (de) * 2004-10-05 2006-04-06 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung und Verfahren zur Straffung eines zum Insassenschutz in einem Fahrzeug dienenden Sicherheitsgurtes
US20060091252A1 (en) * 2004-11-04 2006-05-04 Trw Automotive Gmbh Belt retractor for a vehicle safety belt system and vehicle safety belt system
WO2006108451A1 (fr) 2005-04-12 2006-10-19 Autoliv Development Ab Limiteur de force destine a un vehicule
DE102008049931A1 (de) 2008-10-02 2010-05-20 Autoliv Development Ab Kraftbegrenzungseinrichtung für ein Kraftfahrzeug
DE102008063639A1 (de) * 2008-12-18 2010-06-24 Trw Automotive Gmbh Gurtaufroller mit schaltbarem Gurtkraftbegrenzer
DE102009010435A1 (de) * 2009-02-26 2010-09-02 Autoliv Development Ab Gurtaufroller mit einer geschwindigkeitsgeregelten Kraftbegrenzungseinrichtung
WO2010139433A1 (fr) * 2009-06-05 2010-12-09 Autoliv Development Ab Dispositif de limitation de force pour un véhicule à moteur

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060022447A1 (en) * 2004-07-29 2006-02-02 Kenneth Kohlndorfer Multilevel load limiting retractor with dual shifting mode
DE102004048455A1 (de) * 2004-10-05 2006-04-06 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vorrichtung und Verfahren zur Straffung eines zum Insassenschutz in einem Fahrzeug dienenden Sicherheitsgurtes
US20060091252A1 (en) * 2004-11-04 2006-05-04 Trw Automotive Gmbh Belt retractor for a vehicle safety belt system and vehicle safety belt system
WO2006108451A1 (fr) 2005-04-12 2006-10-19 Autoliv Development Ab Limiteur de force destine a un vehicule
DE102008049931A1 (de) 2008-10-02 2010-05-20 Autoliv Development Ab Kraftbegrenzungseinrichtung für ein Kraftfahrzeug
DE102008063639A1 (de) * 2008-12-18 2010-06-24 Trw Automotive Gmbh Gurtaufroller mit schaltbarem Gurtkraftbegrenzer
DE102009010435A1 (de) * 2009-02-26 2010-09-02 Autoliv Development Ab Gurtaufroller mit einer geschwindigkeitsgeregelten Kraftbegrenzungseinrichtung
WO2010139433A1 (fr) * 2009-06-05 2010-12-09 Autoliv Development Ab Dispositif de limitation de force pour un véhicule à moteur

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10046731B2 (en) 2014-03-12 2018-08-14 Joyson Safety Systems Japan K.K. Energy absorption apparatus, seatbelt retractor, and seatbelt apparatus
US10173638B2 (en) 2014-03-12 2019-01-08 Joyson Safety Systems Japan K.K. Energy absorbing device, seat belt retractor and seat belt apparatus
US10207673B2 (en) 2014-06-10 2019-02-19 Joyson Safety Systems Japan K.K. Seat belt retractor and seat belt device
US10189439B2 (en) 2014-06-27 2019-01-29 Joysoft Safety Systems Japan K.K. Seat belt retractor and seat belt device
US10300883B2 (en) 2014-09-22 2019-05-28 Joyson Safety Systems Japan K.K. Pretensioner, retractor, and seat belt device
US10099652B2 (en) 2014-12-12 2018-10-16 Joyson Safety Systems Japan K.K. Energy absorbing device, seat belt retractor and seat belt device

Also Published As

Publication number Publication date
DE102011101517B4 (de) 2017-10-19
DE102011101517A1 (de) 2012-11-15

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