EP4373716A1 - Enrouleur de ceinture autobloquant - Google Patents

Enrouleur de ceinture autobloquant

Info

Publication number
EP4373716A1
EP4373716A1 EP22750784.5A EP22750784A EP4373716A1 EP 4373716 A1 EP4373716 A1 EP 4373716A1 EP 22750784 A EP22750784 A EP 22750784A EP 4373716 A1 EP4373716 A1 EP 4373716A1
Authority
EP
European Patent Office
Prior art keywords
belt
belt retractor
inertial mass
pivot axis
spring arm
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.)
Pending
Application number
EP22750784.5A
Other languages
German (de)
English (en)
Inventor
Julian STRAUSS
Markus Hueg
Arne Bargmann
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.)
Autoliv Development AB
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 EP4373716A1 publication Critical patent/EP4373716A1/fr
Pending 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
    • B60R22/38—Belt retractors, e.g. reels self-locking in an emergency responsive only to belt 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
    • B60R2022/3402—Retractor casings; Mounting thereof

Definitions

  • the present invention relates to a self-locking belt retractor with a belt shaft that is rotatably mounted in a frame and on which a seat belt can be wound up, a blocking device that blocks the belt shaft when the seat belt pulls out faster than a predetermined value in the direction of the seat belt's pull-out, and with a belt shaft that is mounted on the belt shaft
  • Control disc device which is spring-loaded in particular in the pull-out direction of the safety belt
  • the control disc device comprising a control disc and an inertial mass which is pivotably mounted on the control disc about a pivot axis.
  • the (virtual) pivot axis of the inertial mass is in particular aligned parallel to an axis of rotation of the belt shaft.
  • Self-locking belt retractors are generally used in vehicle safety belt devices in order to wind up a seat belt that is not fastened into a parking position and to allow the safety belt to be pulled out variably with as little belt slack as possible.
  • a belt shaft that is rotatably mounted in a frame and spring-biased in the winding direction is provided in the belt retractor, on which belt shaft the seat belt can be wound.
  • the belt retractor has a blocking device which is activated when the seat belt pulls out more than a predetermined acceleration, so that the belt shaft is then blocked in the belt pull-out direction.
  • the blocking device comprises a blocking pawl mounted on the spool, the movement of which is caused by the pawl mounted rotatably on the spool Control disc device is controlled.
  • the control disc of the control disc device is spring-biased in the belt extraction direction of the belt shaft and rotates with the belt shaft below the predetermined extraction acceleration of the seat belt.
  • An inertial mass is pivotably mounted on the control disk, which pivots when the predetermined pull-out acceleration of the seat belt is exceeded and thereby controls a frame-fixed toothing of the belt retractor and stops the control disk relative to the belt shaft. Stopping the control disk in turn activates the blocking device, in that the blocking pawl mounted on the spool carries out a control movement, forced by a guide in a control contour in the control disk, into a toothing fixed to the frame.
  • the inertial mass must have a certain mass, otherwise it will not pivot when the pull-out acceleration is exceeded. Furthermore, the inertial mass must be pivotably mounted on the control disk rotating with the belt shaft, in such a way that it can perform a relative movement with respect to the control disk for the control of the blocking device. Because of the mass of the inertial mass and its movable mounting, vibrations acting on the belt retractor can lead to unwanted noise being generated by the inertial mass.
  • a self-locking belt retractor with the above features is known, for example, from DE 102010046980 A1.
  • unwanted noise is prevented by a projection that limits a relative movement between the inertial mass and the control disc.
  • a pretensioning device being provided which pretensions the inertial mass parallel to the pivot axis in the direction of the control disc.
  • a prestressing device could be implemented, for example, by a spring that acts on the inertial mass parallel to the pivot axis.
  • other deflectable/deformable elements can also be provided as a pretensioning device, which pretension the inertial mass parallel to the pivot axis, but still allow a (small) relative movement between the inertial mass and control disc parallel to the pivot axis.
  • Such a prestress parallel to the pivot axis of the inertial mass can prevent a rattling noise-causing movement of the inertial mass transverse to the plane of the pivoting movement of the inertial mass.
  • the pivoting movement performed by the inertial mass is hardly or not at all influenced by the pretensioning device.
  • the prestressing device thus exerts a force parallel to the pivot axis on the inertial mass, as a result of which the inertial mass could move minimally parallel to the pivot axis in the event of large forces, but does not perform any movements during normal operation.
  • a minimum free space that is otherwise required due to tolerances is compensated for at the axial ends of the elements forming the pivot axis between the inertial mass and the other components.
  • the pretensioning device can be formed on a component of the self-locking belt retractor.
  • the Pretensioning device can be designed as part of a cap covering the control disc device, so that the pretensioning device acts on the inertial mass only after the belt retractor has been fully installed.
  • the prestressing device could also be designed as part of the control disc.
  • the pretensioning device can be fixed or is fixed as a separate component on the control disk. This makes it possible to mount the pretensioning device on the control disk only after the inertial mass has been attached to the control disk, so that the control disk device can be attached to the other components of the self-locking belt retractor as an independent assembly during installation.
  • the preferably one-piece pretensioning device is preferably fixed in a non-positive and/or positive manner, in particular directly (that is to say without further components), on the control disk, as a result of which assembly is simplified.
  • a snap connection can be formed between the prestressing device and the control disk.
  • the prestressing device has a deflectable spring arm which extends parallel to the control disk. A deflection of the free end of the spring arm, in particular, thus takes place approximately parallel to the pivot axis of the control disc, while the spring arm extends orthogonally to the pivot axis.
  • the pivot axis is defined by a projection formed on the inertial mass and, in particular, having a circular cross section.
  • an appropriate recording for the Projection of the inertial mass is provided on the prestressing device, wherein in the case of the formation of a spring arm, the receptacle is preferably arranged at a (free) end of the spring arm.
  • the projection formed on the inertial mass engages in the receptacle on the spring arm, with the projection and the receptacle having a corresponding cross-sectional shape (in particular circular).
  • the spring arm has a projection which, in order to form the pivot axis of the inertial mass, engages in a corresponding receptacle in the inertial mass.
  • the deflectable end of the spring arm be surrounded at least in sections by a securing web.
  • the at least one safety bar can be formed on another component of the belt retractor.
  • the safety bar is formed in one piece with the spring arm and thus as part of the one-piece prestressing device.
  • the securing bar is arranged in the circumferential direction (relative to the pivot axis of the inertial mass) around the free end of the spring arm.
  • the securing bar is in particular designed in such a way that it surrounds the free end of the spring arm in the circumferential direction for at least 180° and preferably at least 250°.
  • the spring arm have a stop protruding in the direction of the control disc at a distance from its deflectable end. This stop is adjacent to the recording arranged at the end of the spring arm, so that the projection can not get out of the recording.
  • a projection defining the pivot axis which is arranged in particular either on the inertial mass itself or on another component of the belt retractor (such as on the spring arm, the control disk or the cover cap), tapers to a point at its end, in its cross-section is thus reduced towards the end.
  • a projection defining the pivot axis generally has a circular cross-sectional shape.
  • the projections tapering to a point are arranged on opposite sides of the inertial mass.
  • the projections tapering to a point are formed in one piece with the inertial mass and are arranged in corresponding receptacles (in the control disk, on the spring arm or on the cap).
  • the projections can also be formed on the control disk and on the spring arm or on the cap.
  • a receptacle or each receptacle for a projection tapering to a point is designed as a conical trough.
  • a conical trough also ensures that in the event of any force acting on the projections orthogonally to the pivot axis during operation, these return to the predefined bearing point.
  • the opening angle of conical trough is preferably slightly larger (particularly more than 1° and less than 5°) than the angle of the tip of the projection.
  • FIG. 1a a side view of a self-locking belt retractor with an inertial mass that has not been pivoted out
  • FIG. 1b the belt retractor of FIG. 1a with the inertial mass pivoted out
  • FIG. 1 a control disk device of the belt retractor of Figure 1
  • Figure 3 an exploded view of the control disk device
  • FIG. 4 a side view of an inertial mass of the control disk device of FIG. 2,
  • FIG. 5 a cross-sectional view through the control disk device of FIG. 2 without the inertial mass
  • FIG. 6 a perspective view of a prestressing device of the control disk device of FIG. 2 and
  • Figure 7 An exploded view of the self-locking belt retractor of Figure 1.
  • the self-locking seat belt retractor shown in FIGS. 1a, 1b and 7 comprises a frame 12 in which a belt shaft 13 for winding up a seat belt (not shown) is rotatably mounted.
  • the self-locking belt retractor 11 also includes a blocking device 16 with which the seat belt can be blocked from being pulled out of the belt shaft 13 .
  • the blocking device 16 has a blocking pawl 17 which can be actuated to block the rotational movement of the belt shaft 13 and which, in the actuated state, engages in external teeth 18 on the frame 12 of the belt retractor 11 .
  • the belt retractor 11 has a control disk device 1, which includes a control disk 2, an inertial mass 3, a spring 14 and a pretensioning device 5, the inertial mass 3 being pivotably mounted on the control disk 2 and being biased by the spring 4 with a Spring force is applied.
  • control disk device 1 In the assembled state, the control disk device 1 is covered by a cap 15 (not shown in FIGS. 1a and 1b) (see FIG. 7).
  • the control disk device 1 While the safety belt is being pulled out, the control disk device 1 initially rotates with the belt shaft 13. In this state, the inertial mass 3 has not yet pivoted out, as is shown in FIG. 1a. As soon as a predetermined extension acceleration is exceeded during extension, the inertial mass 3 shown in FIGS. 1a and 1b pivots about a pivot axis 4 (see FIG. 1b). The inertial mass 3 engages in a toothing, as a result of which the control disc 2 is held in relation to the spool 13 .
  • the blocking pawl 16 is actuated by a guide in a control contour in the control disk 2, as a result of which the blocking pawl 16 engages in the external teeth 18 on the frame 12.
  • the rotational movement of the spool 13 relative to the frame 12 is blocked.
  • control disc device 1 includes a pretensioning device 5 .
  • the one-piece prestressing device 5 is designed in such a way that it can be fixed positively and non-positively on the control disk 3 by means of a snap connection (see in particular FIG. 5).
  • the pretensioning device 5 comprises a deflectable spring arm 6 which has a receptacle 7.1 at its deflectable end.
  • the deflectable end of the spring arm 6 is surrounded by a securing bar 9 .
  • the spring arm 6 has a stop 10 protruding towards the control disk 2 (downward in FIG. 5).
  • a projection 8.1 of the inertial mass 3, which projection 8.1 defines the pivot axis 4, is arranged in the receptacle 7.1 of the spring arm 6.
  • the prestressing device 5 is dimensioned in such a way that the spring arm 6 prestresses the inertial mass 3 via the projection 7.1 parallel to the pivot axis 4 in the direction of the control disk 2, so that any play that would otherwise exist is compensated for and the inertial mass 3 does not cause any relative movement in the direction of the pivot axis 4 that would cause rattling noises can run to the control disk 2.
  • the securing web 9 and the stop 10 are arranged and designed in such a way that it is prevented that the projection 8.1 of the inertial mass 3 can unintentionally come out of the receptacle 7.1.
  • the inertial mass 3 has projections 8.1 and 8.2 on opposite sides for forming the pivot axis 4, which run to a point (see FIG. 4).
  • the projection 8.1 is arranged in the receptacle 7.1 formed on the spring arm 6 of the prestressing device 5, while the Projection 8.2 is arranged in a receptacle 7.2 formed in the control disk (see FIGS. 3 and 5).
  • the receptacles 7.1 and 7.2 are designed as conically tapering troughs, so that the projections 8.1 and 8.2 tapering to a point and the receptacles 7.1 and 7.2 each have only point-like contact between one another.

Landscapes

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

Abstract

La présente invention concerne un enrouleur de ceinture autobloquant (11) comprenant un arbre de ceinture (13) qui est monté de manière rotative dans un cadre (12), une ceinture de sécurité pouvant être enroulée autour de l'arbre de ceinture, un dispositif de blocage qui bloque l'arbre de ceinture (13) si une accélération de sortie préétablie de la ceinture de sécurité dans la direction de sortie de la ceinture de sécurité est dépassée, et comprenant un dispositif de disque de commande (1) monté sur l'arbre de ceinture (13), le dispositif de disque de commande (1) comprenant un disque de commande (2) et une masse inerte (3) qui est montée sur le disque de commande (2) de manière à pouvoir pivoter autour d'un axe de pivotement (4).
EP22750784.5A 2021-07-22 2022-07-11 Enrouleur de ceinture autobloquant Pending EP4373716A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021119062.2A DE102021119062A1 (de) 2021-07-22 2021-07-22 Selbstsperrender Gurtaufroller
PCT/EP2022/069263 WO2023001614A1 (fr) 2021-07-22 2022-07-11 Enrouleur de ceinture autobloquant

Publications (1)

Publication Number Publication Date
EP4373716A1 true EP4373716A1 (fr) 2024-05-29

Family

ID=82786840

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22750784.5A Pending EP4373716A1 (fr) 2021-07-22 2022-07-11 Enrouleur de ceinture autobloquant

Country Status (6)

Country Link
EP (1) EP4373716A1 (fr)
JP (1) JP2024524611A (fr)
KR (1) KR20240036613A (fr)
CN (1) CN117751057A (fr)
DE (1) DE102021119062A1 (fr)
WO (1) WO2023001614A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10324195B4 (de) * 2003-05-28 2008-12-11 Autoliv Development Ab Sicherheitsgurtaufroller mit einer drehwinkeldefinierten Abschaltung des gurtbandsensitiven Steuersystems
US8579223B2 (en) * 2006-12-02 2013-11-12 Autoliv Development Ab Safety belt retractor with cutoff of its belt-webbing-sensitive and its vehicle-sensitive control system
DE102010046980A1 (de) 2010-09-30 2012-04-05 Autoliv Development Ab Selbstsperrender Gurtaufroller
JP5676283B2 (ja) * 2011-01-11 2015-02-25 株式会社東海理化電機製作所 ウェビング巻取装置
DE102012018262B4 (de) 2012-09-17 2023-07-27 Zf Automotive Germany Gmbh Sperrmechanismus für einen Gurtaufroller
DE102013216491B4 (de) * 2013-08-20 2022-05-05 Autoliv Development Ab Gurtaufroller für eine Sicherheitsgurteinrichtung eines Kraftfahrzeuges
DE102016006750A1 (de) 2016-06-06 2017-12-07 Trw Automotive Gmbh Gurtaufroller für einen Fahrzeug-Sicherheitsgurt
DE102017123839A1 (de) 2017-10-13 2019-04-18 Trw Automotive Gmbh Gurtaufroller

Also Published As

Publication number Publication date
CN117751057A (zh) 2024-03-22
WO2023001614A1 (fr) 2023-01-26
KR20240036613A (ko) 2024-03-20
JP2024524611A (ja) 2024-07-05
DE102021119062A1 (de) 2023-01-26

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