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WO1987001664A1 - Enrouleur de ceinture pour tendeur dorsal - Google Patents

Enrouleur de ceinture pour tendeur dorsal Download PDF

Info

Publication number
WO1987001664A1
WO1987001664A1 PCT/DE1986/000365 DE8600365W WO8701664A1 WO 1987001664 A1 WO1987001664 A1 WO 1987001664A1 DE 8600365 W DE8600365 W DE 8600365W WO 8701664 A1 WO8701664 A1 WO 8701664A1
Authority
WO
WIPO (PCT)
Prior art keywords
control
pawl
gear
gearwheel
teeth
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/DE1986/000365
Other languages
German (de)
English (en)
Inventor
Hans-Otto Kock
Bernd Lacher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Allied Engineering Co SA
Original Assignee
Allied Engineering Co SA
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 Allied Engineering Co SA filed Critical Allied Engineering Co SA
Publication of WO1987001664A1 publication Critical patent/WO1987001664A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • B60R22/36—Belt retractors, e.g. reels self-locking in an emergency
    • B60R22/405—Belt retractors, e.g. reels self-locking in an emergency responsive to belt movement and vehicle movement
    • 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

Definitions

  • the invention relates to a double-synchronized seat belt retractor for rear tensioners, consisting of a gear wheel axially fixedly connected to a winding shaft and a pawl rotatably mounted at a distance from the gear wheel, which also has a toothing for engagement with the gear wheel, the engaging rotary movement of the pawl being one relative to that Gear rotation movement has the opposite direction of rotation, with a control plate which can be carried along by triggering sensors from the gear via pilot control elements, a control curve and a control pin engaging in the control curve.
  • a seat belt retractor is known.
  • such seat belt retractors have two different sensors, one of which reacts to the vehicle's tilting, rocking or jerking movements and the other to accelerated unwinding of the belt.
  • the sensors When triggered, the sensors engage so-called pilot control elements, which create a connection with a driving wheel, for example a gear wheel, which is attached to the winding shaft.
  • the entrained control disk then in turn actuates a pawl or a locking hook, which thereby comes into engagement with a gearwheel, which is also axially fixedly connected to the winding shaft, and blocks it and thus also the winding shaft.
  • the pawl and pawl differ in that the direction of rotation of the pawl coincides with the direction of rotation of the control disk or the gearwheel when the control disc engages in the gearwheel, whereas with a pawl the direction of rotation of the pawl engaging just reverses that of the gearwheel or which is the control disk triggering the rotary movement of the pawl.
  • Synchronized or double-synchronized seat belt retraction he are characterized in that a control pin or a control cam is attached to the control disc at a certain, fixed distance from the respective pilot elements, which or which the hook or controls the pawl into the gear at a more or less precisely defined angle with respect to the tooth position of the gear.
  • the control cam is designed as a groove in the pawl, while the control pin is firmly attached to the control disc. Because of the already mentioned sense of rotation of the pawl relative to the gearwheel and the associated control disk, it follows that the control cam on the pawl must have a radially inward-pointing component in order to insert the pawl into the gearwheel, since the distance of the control pin from the axis of rotation of the control disk remains constant while the distance of the control pin to the pin or the axis of rotation of the pawl must decrease during the control process.
  • the teeth of the gearwheel and the pawl are generally asymmetrical and have a flat and a steep flank, the locking forces being absorbed by the steep flanks when the pawl engages in the gearwheel, while the flat tooth flanks provide sufficient hold and sufficient strength of the teeth care, but on the other also cause a corresponding distance between the teeth, so that the introduction of the teeth is even possible.
  • the steep flank of the teeth is necessary so that the pawl is not pushed out of the gearwheel again by the forces acting in the radial direction on flat flanks.
  • the control cam has a recess tangential in the locked position with respect to the gearwheel axis, into which the control pin can engage while the gearwheel performs the residual rotation described above.
  • the rewind tensioner rotates the winding shaft and the gearwheel in the non-blocking direction with great force and very quickly.
  • the control disc and the control pin attached to it and also the pilot elements are returned to their starting position by springs and thus unlock the system, the winding process by the back tensioner happens so quickly that the control disc and the you connected parts practically remain in their position during the rotation of the gear.
  • the pawl is forcibly in the direction of its output via the flat flanks of the teeth of the pawl and the gearwheel would be pushed back, the control pin located in the tangential recess of the control cam being subjected to a large force in the radial direction.
  • control pin since the control pin has a fixed distance with respect to the axis, it is either broken off, bent or pushed out of the control curve by the force acting in the radial direction and possibly jammed with the pawl.
  • the control disk and the pilot control elements can also be destroyed or damaged. This can lead to the case that after the back tightening process has been completed, the freely running winding shaft is no longer secured by the locking device, as a result of which the entire belt has lost its securing function.
  • the invention is therefore based on the object of providing a seat belt retractor for rear tensioners, which is automatically unlocked in the locked position when the rear tensioner is triggered in the short time available without losing its locking function or being damaged in any other way.
  • control curve of the belt retractor according to the invention does not have a tangential recess, but instead is inclined by at least 10 ° with respect to the tangential direction.
  • the radial force component which acts on the pawl is partially converted into a tangential force component at the edge of the control cam which is inclined towards the tangential direction, as a result of which the guide pin dodges by means of a rotational movement about the axis of rotation of the guide disk and the ring gear, the control disk and the pilot control elements be turned back to their starting position at the same time.
  • This resetting of the control pin and the associated control disc and the pilot elements is thus forced by the backward movement of the gear and the resulting pushing out of the pawl out of engagement with the gear and happens much faster than would be possible by the return spring.
  • control pin is arranged on the pawl and the control cam on the control disk.
  • the control pin arranged at a fixed distance from the bearing pin of the pawl must be guided along a control curve in such a way that its distance from the axis of rotation of the control disc and the gearwheel decreases continuously. If you put num again, As in the example mentioned above, a substantially constant angular velocity of the gear and the control disc ahead, it can be seen that the control movement of the pawl in the toothing of the gear runs at a continuously decreasing speed.
  • this constructive measure ensures that the control or latching process can be carried out even more precisely and in a better synchronized manner than in the known belt retractors.
  • the angle which the control curve includes with the tangential direction is at least 20 °.
  • the angle which the control curve includes with the tangential direction is to be understood as the angle which is at the point of intersection between the longitudinal center line of the control curve groove and one around the axis of the control disk the circle between the tangent at this point and the tangent to the longitudinal center line of the cam groove at this point.
  • the pawl is arranged in a plane with the gear on a housing plate rotatable about a pin or rivet fastened in the frame outside the gear radius.
  • Such an embodiment enables easy and quick assembly of the pawl and the other parts.
  • a hook attached to the housing plate engages around the pawl.
  • the pivot of the pawl in the housing plate is rotatably mounted and the pawl engages in a gear above the housing plate in the gear, a torque is exerted on this pawl when the gear engages in the pawl, which endeavor to turn the pawl out of its rotating plane. Therefore, according to the invention, the pawl is held in its plane of rotation by a hook encompassing it.
  • control pin is designed as a rivet projecting through an arcuate slot in the housing plate, the head of which is wider than the slot and is arranged on the side of the housing plate opposite the pawl.
  • the pawl is held in its rotational plane by the control pin, which is designed as a safety rivet on one side.
  • the teeth of the pawl have a steep and a flat flank and that the tooth shape of the gear is adapted to the teeth of the pawl.
  • This rear side which is not loaded when locking, transmits the power transmission from the gear to the pawl by means of the back tensioning device at the beginning of the back tensioning process, by means of which it is pressed out of the gear, while at the same time the control disc and the control pin are used to reset the control disk and the front control elements.
  • a belt retractor in which the control cam is arranged on the control disc, the control pin is arranged on a locking hook, whereby the same unfavorable conditions for the movement of the hook as for the belt retractor result due to the rotational movement in the same direction as the gearwheel during the control process with pawl, in which the control cam is arranged on the pawl and the control pin on the control disc.
  • the situation with locking hooks is exactly the opposite of that with pawls.
  • FIG. 1 shows the side view of a belt retractor for tensioners
  • FIG. 2 shows an axial section through the belt retractor of FIG. 1, the broken back tensioner attached to it also being shown.
  • the seat belt retractor shown as a preferred embodiment in the drawings has the winding axis, generally designated 1, and the ratchet gear 40, which is axially fixedly connected to the latter, in whose teeth the toothing 41 of the pawl 18 can engage, which, via a pin 19 designed as a rivet, on the housing plate 16 is arranged rotatably.
  • the belt retractor or automat also has vehicle-sensitive sensors, namely the inertial mass stored in the housing 28 of the sensor in the form of a hanging or standing pendulum or a ball, the pawl axis 31 provided in the bearing arranged on the housing 28 with a vehicle-sensitive pawl 30 and the pilot lever 22 controlled therefrom. The latter is brought into engagement with teeth of the control wheel 23 in the event of excessive vehicle acceleration by the vehicle-sensitive pawl 30, which is connected to the control plate 20 in such a way that the pilot lever 22 is rotatably mounted on the control plate 20.
  • control plate 20 also has an internal toothing 44 into which the control tooth of the belt-sensitive pawl 24 engages in the event of excessive belt webbing acceleration, which in turn is rotatably mounted about a pin 45 which is fixedly connected to the winding shaft.
  • the control of the belt-sensitive pawl 24 is done via a mass carrier 26, on which in turn an inert mass 25 is frictionally attached.
  • the frictional connection between mass carrier 26 and mass 25 is so firm that it acts practically as a rigid connection when the belt is accelerated, as can occur in everyday use of the machine, but on the other hand, the inert mass 25 slides on the mass carrier 26, if the latter the triggering of the back tensioner via the pawl 24 experiences extreme acceleration.
  • mass carrier 26 and mass 25 because of the inertia of mass 25, the force acting on pawl 24 during the re-tightening process would be so great that it would probably be destroyed.
  • the pawl 24 rotatably mounted on the pin 45 moves with the Winding shaft in the direction of the mass carrier 26, which practically remains in its position due to the large acceleration resistance caused by the inert mass 25 attached to it, so that the pawl 24 is rotated around the pin 45 and thereby engages with the internal toothing 44 of the Control plate 20 comes.
  • a compression spring 27 brings the pawl 24 back into the release position as soon as the belt acceleration falls below a certain value, which depends on the ratio of the force of the compression spring 27 to the total inert mass formed by mass carrier 26 and mass 25.
  • the control plate 20 has a spring receptacle 46 for a spring 21, which is supported on a bracket 47 fastened to the housing 16.
  • This pressure-retaining spring 21 moves the control plate 20 after the strain relief of the webbing and, via the control cam 36 and the control pin 37, also the pawl 18 back to its starting position.
  • the gearwheel 40 and the associated winding shaft 1 are also turned back via the toothing 41 of the pawl 18, as long as the pawl 18 and the gearwheel 40 are in engagement with one another.
  • control cams in known, comparable machines for the control pin in the state of engagement of the corresponding pawl with the corresponding gear always have a tangential to the circumference of the gear recess, which is shown broken off in the part of the control curve 36 shown in Figure 1 down would connect.
  • the control pin 37 could not move in the radial direction, so that the destruction of some components would have to be expected and the back tightening process would also be hindered.
  • FIG. 2 shows the tensioner, which is shown in the upper part, its attachment to the belt retractor and its parts placed on the tensioner:
  • a holder 13 which holds a gas generator 5 and a cylinder 43, which are connected by means of a T-piece 2, is attached to the housing plate 16 via a rivet 6.
  • the piston 3 is located in the cylinder 43, and the continuous cable 4 runs coaxially in it.
  • the cable store 7, in which the cable 4 is held wound is connected at the bottom.
  • a spring cassette 9 for a return spring not shown, under the cap 8 shown on the left in FIG. 2, and the pulley 10 is mounted coaxially within the cable storage device.
  • the screw 12 shown at the bottom left in FIG. 2 the parts are then fastened to the housing plate 16, against which the winding shaft 1 is supported via the bearing 14.
  • the axis toothing 15 belongs to the winding shaft 1. On this left you can see the serration 15a, which causes the connection with the rope pulley 10.

Landscapes

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

Abstract

Enrouleur de ceinture de sécurité pour tendeur dorsal à synchronisation double, comportant une roue dentée (40) reliée axialement et de manière fixe à un arbre d'enroulement et un cliquet de blocage (18) fixé de manière rotative à une distance de la roue dentée (40), le cliquet (18) possédant également une denture (41) qui s'engage dans la roue dentée (40), le mouvement de rotation d'engagement du cliquet de blocage (18) ayant un sens de rotation inverse à celui de la roue dentée, avec une plaque de commande (20) pouvant être entraînée après le déclenchement par les capteurs (25, 30) de la roue dentée (40) par l'intermédiaire d'éléments de pré-commande (22, 24), ainsi qu'une came de commande (36) et un axe de commande (37) qui s'engage dans la came de commande (36) pour permettre le déblocage automatique dans la position verrouillée lors du déclenchement du tendeur dorsal, sans perdre la fonction de blocage, l'invention prévoit la disposition de l'axe de commande (36) sur le cliquet de blocage (18) et de la came de commande (36) sur la plaque de commande (38) ainsi que l'inclinaison de la came de commande (36) sur toute sa longueur selon un angle d'au moins 10o par rapport à une tangente qui à l'interface appropriée de la came de commande (36) est appliquée avec un arc de cercle qui passe autour de l'axe de rotation (38) de la roue dentée (40).
PCT/DE1986/000365 1985-09-17 1986-09-13 Enrouleur de ceinture pour tendeur dorsal Ceased WO1987001664A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853533126 DE3533126A1 (de) 1985-09-17 1985-09-17 Gurtaufroller fuer rueckstraffer
DEP3533126.7 1985-09-17

Publications (1)

Publication Number Publication Date
WO1987001664A1 true WO1987001664A1 (fr) 1987-03-26

Family

ID=6281180

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1986/000365 Ceased WO1987001664A1 (fr) 1985-09-17 1986-09-13 Enrouleur de ceinture pour tendeur dorsal

Country Status (3)

Country Link
EP (1) EP0236381A1 (fr)
DE (1) DE3533126A1 (fr)
WO (1) WO1987001664A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0360902A1 (fr) * 1988-09-29 1990-04-04 Trw Repa Gmbh Dispositif propulsif pour des systèmes de retention dans des véhicules automobiles
DE102004012165A1 (de) * 2004-03-09 2005-10-06 Takata Corp. Gurtstraffer

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR900001552A (ko) * 1988-07-27 1990-02-27 다까다 쥬우이찌로오 시이트 벨트 리트랙터
JP3093852B2 (ja) * 1992-01-30 2000-10-03 タカタ株式会社 シートベルトリトラクタ
JPH05208657A (ja) * 1992-01-30 1993-08-20 Takata Kk シートベルトリトラクタ
JP3233429B2 (ja) * 1992-03-06 2001-11-26 タカタ株式会社 シートベルトリトラクタ
BR9803030A (pt) * 1998-08-10 2000-05-02 Huzimet Acos Especiais Ltda Aperfeiçoamento em cinto de segurança com pretensionador.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2071993A (en) * 1980-03-24 1981-09-30 Repa Feinstanzwerk Gmbh Safety belt reel
DE3144340A1 (de) * 1981-01-23 1982-08-19 Naamloze Vennootschap Klippan S.A., 3030 Heverlee Gurtaufroller fuer sicherheitsgurte
GB2113529A (en) * 1982-01-18 1983-08-10 Kangol Magnet Ltd Retractor mechanism
EP0092407A2 (fr) * 1982-04-20 1983-10-26 Ase (Uk) Limited Rétracteur à blocage automatique pour ceinture de sécurité de véhicule
EP0093233A1 (fr) * 1982-04-29 1983-11-09 Bayern-Chemie Gesellschaft für flugchemische Antriebe mit beschränkter Haftung Dispositif de rétraction pour ceintures de sécurité
EP0153726A2 (fr) * 1984-02-29 1985-09-04 Autoflug Gmbh Enrouleur de ceinture de sécurité ayant un dispositif tendeur

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2539830A1 (de) * 1975-09-08 1977-03-10 Autoflug Gmbh Passives sicherheitsgurtsystem fuer kraftfahrzeuge
DE3040667A1 (de) * 1980-10-29 1982-05-27 Autoflug Gmbh, 2084 Rellingen Strammvorrichtung fuer sicherheitsgurte

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2071993A (en) * 1980-03-24 1981-09-30 Repa Feinstanzwerk Gmbh Safety belt reel
DE3144340A1 (de) * 1981-01-23 1982-08-19 Naamloze Vennootschap Klippan S.A., 3030 Heverlee Gurtaufroller fuer sicherheitsgurte
GB2113529A (en) * 1982-01-18 1983-08-10 Kangol Magnet Ltd Retractor mechanism
EP0092407A2 (fr) * 1982-04-20 1983-10-26 Ase (Uk) Limited Rétracteur à blocage automatique pour ceinture de sécurité de véhicule
EP0093233A1 (fr) * 1982-04-29 1983-11-09 Bayern-Chemie Gesellschaft für flugchemische Antriebe mit beschränkter Haftung Dispositif de rétraction pour ceintures de sécurité
EP0153726A2 (fr) * 1984-02-29 1985-09-04 Autoflug Gmbh Enrouleur de ceinture de sécurité ayant un dispositif tendeur

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0360902A1 (fr) * 1988-09-29 1990-04-04 Trw Repa Gmbh Dispositif propulsif pour des systèmes de retention dans des véhicules automobiles
US4927175A (en) * 1988-09-29 1990-05-22 Trw Repa Gmbh Drive device for restraining systems in motor vehicles
DE102004012165A1 (de) * 2004-03-09 2005-10-06 Takata Corp. Gurtstraffer
US7905441B2 (en) 2004-03-09 2011-03-15 Takata Corporation Seat belt tensioner

Also Published As

Publication number Publication date
EP0236381A1 (fr) 1987-09-16
DE3533126A1 (de) 1987-03-19

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