WO2014131824A1 - Enrouleur de ceinture pour système de ceinture de sécurité d'un véhicule automobile comprenant un dispositif tendeur rotatif et un dispositif limiteur de force - Google Patents

Enrouleur de ceinture pour système de ceinture de sécurité d'un véhicule automobile comprenant un dispositif tendeur rotatif et un dispositif limiteur de force Download PDF

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Publication number
WO2014131824A1
WO2014131824A1 PCT/EP2014/053808 EP2014053808W WO2014131824A1 WO 2014131824 A1 WO2014131824 A1 WO 2014131824A1 EP 2014053808 W EP2014053808 W EP 2014053808W WO 2014131824 A1 WO2014131824 A1 WO 2014131824A1
Authority
WO
WIPO (PCT)
Prior art keywords
belt
shaft body
limiting device
belt shaft
force
Prior art date
Application number
PCT/EP2014/053808
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 WO2014131824A1 publication Critical patent/WO2014131824A1/fr

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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
    • B60R22/4676—Reels with means to tension the belt in an emergency by forced winding up comprising energy-absorbing means operating between belt reel and retractor frame

Definitions

  • the invention relates to a belt retractor for a safety belt device of a motor vehicle with a rotary strapping device and a force limiting device having the features of the preamble of claim 1.
  • the purpose of the tensioning devices is to extract slacklings that are present in an early phase of an accident from the seat belt of the safety belt device, which is realized in a belt retractor by driving the belt shaft in the lifting direction.
  • the force limiting devices serve to enable a force-limited belt extension movement when the belt shaft is locked, in order to reduce the occupant load while making use of the available forward displacement path.
  • the force limiting device is arranged in the power flow between the belt shaft body and a vehicle-locking profile head, so that the Gurtwellen stresses can perform a force-limited rotational movement in Gurtauszugszugsraum with the webbing wound on activation of the force limiting device relative to the blocked profile head.
  • the drive wheel should be arranged as close as possible to the housing of the belt retractor. Furthermore, the attachment point of the belt retractor should be arranged as centrally as possible. Since the tensioning device at the o.g. Solution is arranged with the drive wheel on the profile head of the belt retractor, both criteria are difficult to meet with this solution.
  • the object of the invention is therefore to provide a belt retractor with a tensioning device and a force limiting device, in which the above-described force limiting - disturbance is avoided, and which simultaneously the storage and mounting can be improved.
  • the puncture device and the profile head are arranged on different sides of the belt body, and a transmission device is provided by means of which the tensioning movement of the tensioning device can be transmitted through the belt shaft body to the profile head.
  • the advantage of the proposed solution is the fact that a balanced package of the belt retractor can be achieved with the advantages described above by the arrangement of the criminal fVor therapies and the profile head on different sides of the belt shaft body. Since the tensioning movement is connected by the connection of the tensioning device via the transmission device with the profile head, the tensioning force is still transmitted via the profile head on the belt shaft body, so that the tensioning device by the blocking of the profile head already at the beginning of the activation of the first force limiting device of this and the Belt shaft body is decoupled. Thus, the adverse force limiting disturbance is avoided.
  • the proposed solution provides the advantage that the tensioning device can be arranged with the drive wheel particularly close to the housing so that the rotatable parts and in particular the drive wheel of the tensioning device can be stored particularly well. Furthermore, there is a cheaper Weight distribution, and the profile head can be made easier, since the drive wheel of the tensioning device is no longer arranged on the profile head.
  • a second force limiting device is provided, which transmits the tension of the tensioning device on the belt shaft body
  • Tightening force at the beginning of the tightening movement limited during a predetermined rotation angle By the second force limiting device, the very high tensioning force can be reduced at the beginning of the tightening movement, so that the first power limiting device is charged less.
  • the first force limiting device thus transmits the entire penalty force only when the second force limiting device is no longer active after passing through the predetermined rotation angle.
  • the belt shaft body is hollow, and the transmission device is formed by a belt shaft penetrating the transfer rod, which is non-rotatably connected to a first end with the tensioning device and a second end rotatably connected to the profile head.
  • the transfer rod guided through the hollow belt shaft body as a transfer device, a particularly compact construction can be realized, wherein in particular a previously used hollow standard belt shaft body can be used.
  • the second force-limiting device can be formed by a metal band suspended in the transfer rod, which extends radially outwards from the transfer rod, is deflected in at least one deflection point and is supported with a free end in the winding direction on the belt shaft body. Due to the proposed solution, the metal strip runs around during the tensioning movement in the deflection energy-consuming and is wound up on the transfer rod or on an extension of the profile head. The metal band is supported during an initial phase of the tensioning movement directly between the transfer rod and the Gurtwellen emotions and thereby transmits the tensioning movement of the transfer rod on the belt shaft body until the metal strip is completely wound by the circulation of the deflection point on the transfer rod and the connection is canceled. In parallel, the first force limiting device is loaded simultaneously, which only then transmits the full tensioning force when the metal strip is completely wound by the circulation of the deflection point, and the connection is canceled via the second force limiting device.
  • the metal strip can extend through a slot in the transfer rod and be supported point symmetrically with two free ends on the belt shaft body.
  • a point-symmetrical force introduction into the belt shaft body can be achieved so that the radial forces between the transfer rod or the profile head and the belt shaft body act as uniformly as possible and the maximum radial force is lower.
  • the metal strip must be inserted only in the slot and not separately fastened, since the tensile forces act from both ends on the metal strip and compensate in the ideal case.
  • the force limiting device is arranged between the legs of the U-shaped frame. Due to the proposed arrangement of the force limiting device, both the profile head and the belt Lenkorper be rotatably mounted in the legs of the frame and that in each case so that the force introduced by the Kraftbegrenzungsein- direction force is introduced into the two parts between the bearings, so that can be achieved overall favorable lever arm ratios.
  • the two-piece belt Elle can be stored in one leg on the belt shaft body and in the other leg on the profile head, resulting in a simple structural design with a good storage of the belt shaft.
  • the force limiting device is formed annular disc-shaped, and the transmission device protrudes centrally through the Kraftbegrenzungs- device.
  • the force limiting device practically encompasses the two-part belt shaft and connects the belt shaft body and the profile head to a radially outer section. Due to the annular disk-shaped design of the force limiting device, a free section is provided centrally through which the transmission device, a section of the belt shaft body and a section of the profile head can protrude, whereby a simple connection of the transfer rod to the profile head through the force limiting device is possible.
  • the components may overlap centrally in the opening of the force limiting device in the axial direction, so that the belt shaft body can be supported on the profile head during the activation of the force limiting device and is thus practically supported.
  • the components may overlap so far that there is a plane in which protrude the first and second force limiting device, a portion of the profile head and a portion of the belt shaft body and an end of the transfer rod. It is further proposed that the force limiting device is speed-controlled.
  • Velocity-controlled force limiting devices can, for example, on the basis of an oscillating mass system or on the basis of liquid damping, enable a force-limited belt webbing pull-out, wherein the belt pull-out force is dependent on the speed of the mutually moving parts of the force limiting device. Since the tensioning device causes a very high acceleration of the transfer rod and the profile head at the beginning of the activation, the rotational speed of the driven components increases very quickly in the initial phase of the tightening movement. Since the first force limiting device is also speed-controlled, the tensioning force transferable via the first force limiting device likewise increases, so that the first force limiting device practically adapts to the tensioning force to be transmitted.
  • the use of the proposed second force limiting device in conjunction with the speed-controlled first force limiting device makes sense, since the speed-controlled first force limiting device only requires a certain relative speed of the moving components to build up their effect.
  • the first force limiting device is practically relieved by the second force limiting device by a part of the tensioning force is transmitted from the second force limiting device.
  • the tensioning device comprises a driven drive wheel which is connected to the profile head in a tensile-resistant manner via the transmission device in the axial direction.
  • the drive wheel is axially secured by the tensile connection with the profile head, so that it is held in a position in which it optimally with a can interact drive device.
  • the profile head is also connected via the second force limiting device with the belt shaft body, the drive wheel is thereby fixed relative to the belt shaft body in the axial direction, without being directly connected to this.
  • the belt shaft body and the drive wheel are thereby axially fixed to each other and can still rotate to each other, which in turn is important for the force-limited Gurtbandauszugsschi during Kraftbegrenzungsphase.
  • Fig. 1 a belt retractor according to the invention with a
  • Fig. 2 a sectional view of the belt retractor from the
  • Fig. 3 a sectional view of the belt retractor along the cutting direction A-A from FIG. Second
  • Fig. 1 shows a belt retractor according to the invention with a first force limiting device 1 and a tensioning device 2, which has a two-part belt shaft mounted rotatably in a vehicle-fixed U-shaped frame 3.
  • the two-part belt shaft comprises a belt shaft body 4, on which a safety belt 5 can be wound up.
  • the belt shaft is spring-biased by means of a winding spring in the elevator direction and by means of a vehicle-sensitive and web-belt-sensitive controllable blocking device. blockable in the extension direction.
  • the tensioning device 2 and the first force limiting device 1 are arranged on different sides of the belt shaft body 4, the first force limiting device 1 being arranged between the legs of the frame 3 and the tensioning device 2 on the outside of the left leg of the frame 3.
  • the belt shaft is formed in two parts from the belt shaft body 4 and a profile head 7 and rotatably mounted on the belt shaft body 4 in the left leg and on the profile head 7 in the right leg of the frame 3.
  • the belt shaft body 4 and the profile head 7 are connected to each other via the first ring-shaped force limiting device 1 in a radially outer portion.
  • the tensioning device 2 comprises a drive wheel 17, which is non-rotatably connected to a first end 12 of a transmission device 6.
  • the transmission device 6 is formed by a transfer rod which extends through the hollow belt shaft body 4 and is connected to a second end 11 in a tension-proof and rotationally fixed manner to the profile head 7.
  • the drive wheel 17 and the profile head 7 form a non-rotatable composite, and the drive wheel 17 is also connected in the axial direction of the belt shaft tensile strength with the profile head 7. Since the profile head 7 is also connected to the belt shaft body 4 via the first force limiting device 1, the drive wheel 17 is thus also fixed relative to the belt shaft body 4 in the axial direction.
  • the second end 11 of the transfer rod is contoured in cross-section such that the profile head 7 is connected in a form-fitting manner with the second end 11 of the transfer rod in the circumferential direction by two axial fingers 8 resting against the second end 11.
  • a second force limiting device 10 is provided in the form of a metal strip which is inserted into a transverse slot in the second end 11 and in the circumferential direction between the axial fingers 8 of the profile head 7 and the second End 11 of the transfer rod is trapped.
  • the metal strip extends point-symmetrically from the transfer rod radially outward through two opposite deflection points and lies with the free ends in the winding direction in a form-fitting manner against the second end 11 of the transfer rod axially overlapping annular flange 9 of the belt shaft body 4.
  • the second force limiting device 10 is thus arranged parallel to the first force limiting device 1 between the profile head 7 and the belt shaft body 4.
  • the first force limiting device 1 is a speed-controlled force limiting device with two annular toothed disks 14 and 15 connected in a rotationally fixed manner to the belt shaft body 4 and a vibrating disk 16 arranged between the gear disks 14 and 15
  • Oscillating disk 16 is rotatably connected via an internal toothing and axially displaceable with a toothed ring 13, which in turn is rotatably connected to the profile head 7.
  • the first force limiting device 1 is activated by the profile head 7 is blocked in a first step by an activation of the blocking device relative to the vehicle-fixed frame 3.
  • the toothed ring 13 and the vibrating plate 16 are also blocked in the circumferential direction.
  • the belt shaft body 4 starts to rotate in the extension direction, whereby the rotational movement is made possible by the swing disk 16 executing a periodic oscillating movement in the axial direction, while alternately engaging the gears of the splines 14 and 15.
  • the operating principle of the first force limiting device is also described for example in DE 10 2011 101 516 AI.
  • the drive wheel 17 Upon activation of the tensioning device 2 in the early phase of an accident, the drive wheel 17 is driven abruptly in the winding direction of the safety belt 5. This drive movement of the drive wheel 17 is transmitted via the second end 11 of the transfer bar to the profile head 7 which is not blocked at this time. In the course of the power flow, the tensioning movement is transmitted from the profile head 7 via the parallel acting first and second force limiting means 1 and 10 on the belt shaft body 4. In this case, the second force limiting device 10 transmits the
  • This angle of rotation, until the metal strip is no longer present, corresponds to the angle of rotation during which the second force limiting device 10 acts.
  • the oscillating disc 16 is driven via the toothed ring 13 by the profile head 7 driven by the transmission device 6. Since the vibrating plate 16 is at least in the initial position in engagement with one of the toothings of the toothed discs 14 and 15, the belt shaft body 4 is driven in parallel via the first force limiting device 1. In this case, the acceleration of the vibrating disk 16 is so great that the vibrating disk 16, due to its mass and the inertial force to be overcome thereby, does not carry out the oscillating motion and transmits the rotational motion lossless to the belt shaft body 4.
  • the vibrating plate 16 starts to oscillate axially and thereby performs a feed movement relative to the toothed discs 14 and 15, whereby the length of the tension can be reduced. It is, however, desirable to transfer the tensioning movement as far as possible without losses, ie the rotational movement of the profile head 7 should be transmitted as identically as possible to the belt shaft body 4.
  • the tightening performance of the tensioning device 2 is particularly high at the beginning of the activation. This high tensioning performance can be transmitted particularly well by the force-limiting devices 1 and 10 acting in parallel and with the least possible losses. Since the tightening force basically decreases after the tightening movement has been completed in the initial phase, the first force limiting device 1 alone is sufficient to transfer the tightening movement from a specific tightening length alone. In this case, the acting tension force in relation to the forces acting on the force limitation is so small that it is arranged in a relatively low portion of the design range of the force limiting characteristic of the first force limiting device 1, by the first Force limiting device 1 is not yet fully effective. In this range of the force limiting characteristic of the first force limiting device 1, the vibrating plate 16 does not yet start to vibrate, or the vibrating plate 16 oscillates only at a very small frequency, so that the loss of tension is thereby also minimized.
  • the profile head 7 After completion of the tightening process, the profile head 7 is blocked when exceeding a predetermined vehicle deceleration or GurtbandausZugsbeatung relative to the frame 3 in Gurtauszugscardi and the tensioning device 2 thereby decoupled from the belt shaft body 4.
  • GurtausZugkraft then continues to increase, the first force limiting device 1 is activated without the tensioning device 2 has an influence on the acting GurtausZugkraft. The previously occurring force limiting fault is thus excluded. It is of particular importance that at this time the connection between the profile head 7 and the second end 11 of the transfer rod and the belt shaft body 4 is already repealed, so that the force limiting characteristic is determined solely by the first force limiting device.
  • the advantage of the proposed solution is the fact that the tensioning device 2 can be arranged on the side of the frame 3, on which the spring cassette 18 of the belt retractor is arranged, or in other words, the tensioning device 2 and the blocking device or the first force limiting device 1 are arranged on different sides of the belt shaft body 4. This results in a very balanced package of the belt retractor with a balanced weight distribution and an approximately centered screw point of the belt retractor.
  • the tensioning device is at a distance from the blocking device or the

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

Abstract

La présente invention concerne un enrouleur de ceinture destiné à un système de ceinture de sécurité d'un véhicule automobile, comprenant un dispositif tendeur rotatif (2) et un premier dispositif limiteur de force (1), comprenant - un cadre en forme de U (3) qui peut être fixé à demeure sur le véhicule et comporte deux branches parallèles, - un axe de ceinture en deux parties monté rotatif dans les branches du cadre en forme de U (3) et comprenant un corps d'axe de ceinture (4) sur lequel une ceinture de sécurité (5) peut être enroulée et une tête profilée (7) qui peut être verrouillée à demeure sur le véhicule par rapport au cadre (3). Selon l'invention, le premier dispositif limiteur de force (1) relie la tête profilée (7) au corps d'axe de ceinture (4), le dispositif tendeur (2) et la tête profilée (7) sont disposés sur des côtés différents du corps d'axe de ceinture (4), et un dispositif de transmission (6) permet de transmettre le mouvement de tension du dispositif tendeur (2) à la tête profilée (7) par l'intermédiaire du corps d'axe de ceinture (4).
PCT/EP2014/053808 2013-02-27 2014-02-27 Enrouleur de ceinture pour système de ceinture de sécurité d'un véhicule automobile comprenant un dispositif tendeur rotatif et un dispositif limiteur de force WO2014131824A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013203286.2 2013-02-27
DE102013203286.2A DE102013203286B4 (de) 2013-02-27 2013-02-27 Gurtaufroller für eine Sicherheitsgurteinrichtung eines Kraftfahrzeuges mit einer rotatorischen Straffvorrichtung und einer Kraftbegrenzungseinrichtung

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WO2014131824A1 true WO2014131824A1 (fr) 2014-09-04

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PCT/EP2014/053808 WO2014131824A1 (fr) 2013-02-27 2014-02-27 Enrouleur de ceinture pour système de ceinture de sécurité d'un véhicule automobile comprenant un dispositif tendeur rotatif et un dispositif limiteur de force

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DE (1) DE102013203286B4 (fr)
WO (1) WO2014131824A1 (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
DE102014210397B4 (de) 2014-06-03 2018-01-11 Autoliv Development Ab Gurtaufroller für eine Sicherheitsgurteinrichtung eines Kraftfahrzeugs mit einer rotatorischen Straffvorrichtung und einer Kraftbegrenzungseinrichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10213906A1 (de) 2002-03-28 2003-10-23 Autoliv Dev Leistungsstraffer
DE102011101516A1 (de) 2011-05-13 2012-11-15 Autoliv Development Ab Gurtaufroller mit einer Straffeinrichtung und einer geschwindigkeitsgeregelten Kraftbegrenzungseinrichtung
WO2012165408A1 (fr) * 2011-06-03 2012-12-06 芦森工業株式会社 Rétracteur de ceinture de sécurité
WO2013021787A1 (fr) * 2011-08-09 2013-02-14 タカタ株式会社 Dispositif d'enrouleur pour ceinture de sécurité, et dispositif de ceinture de sécurité

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004048161A1 (fr) * 2002-11-25 2004-06-10 Autoliv Development Ab Pretensionneur de ceinture equipe d'un limiteur de force
DE102005026885B4 (de) * 2005-06-10 2015-01-08 Trw Automotive Gmbh Kraftbegrenzer für einen Fahrzeug-Sicherheitsgurt
DE102008010430A1 (de) * 2008-02-21 2009-09-24 Autoliv Development Ab Gurtaufroller
DE102009017268B4 (de) * 2009-04-11 2012-12-20 Autoliv Development Ab Gurtstraffer mit einem über einen Torsionsstab erfolgenden Antrieb der Gurtwelle und zusätzlichem Rotationsdämpfer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10213906A1 (de) 2002-03-28 2003-10-23 Autoliv Dev Leistungsstraffer
DE102011101516A1 (de) 2011-05-13 2012-11-15 Autoliv Development Ab Gurtaufroller mit einer Straffeinrichtung und einer geschwindigkeitsgeregelten Kraftbegrenzungseinrichtung
WO2012165408A1 (fr) * 2011-06-03 2012-12-06 芦森工業株式会社 Rétracteur de ceinture de sécurité
WO2013021787A1 (fr) * 2011-08-09 2013-02-14 タカタ株式会社 Dispositif d'enrouleur pour ceinture de sécurité, et dispositif de ceinture de sécurité

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
DE102013203286A1 (de) 2014-08-28
DE102013203286B4 (de) 2016-12-22

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