WO2020254300A1 - Bobine de ceinture de sécurité et enrouleur de ceinture de sécurité comportant une bobine de ceinture de sécurité - Google Patents

Bobine de ceinture de sécurité et enrouleur de ceinture de sécurité comportant une bobine de ceinture de sécurité Download PDF

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Publication number
WO2020254300A1
WO2020254300A1 PCT/EP2020/066576 EP2020066576W WO2020254300A1 WO 2020254300 A1 WO2020254300 A1 WO 2020254300A1 EP 2020066576 W EP2020066576 W EP 2020066576W WO 2020254300 A1 WO2020254300 A1 WO 2020254300A1
Authority
WO
WIPO (PCT)
Prior art keywords
axial
belt
circumferential circle
constriction
belt reel
Prior art date
Application number
PCT/EP2020/066576
Other languages
German (de)
English (en)
Inventor
Jens Bohn
Thomas Kielwein
Original Assignee
Zf Automotive Germany Gmbh
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 Zf Automotive Germany Gmbh filed Critical Zf Automotive Germany Gmbh
Priority to CN202080052055.0A priority Critical patent/CN114126932A/zh
Priority to PCT/EP2020/066576 priority patent/WO2020254300A1/fr
Priority to US17/618,485 priority patent/US20220234539A1/en
Publication of WO2020254300A1 publication Critical patent/WO2020254300A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
    • B26D7/0616—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form by carriages, e.g. for slicing machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
    • B26D7/0683—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form specially adapted for elongated articles
    • 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
    • B60R22/4604—Reels with means to tension the belt in an emergency by forced winding up characterised by arrangements in vehicle or relative to seat belt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D2210/00—Machines or methods used for cutting special materials
    • B26D2210/02—Machines or methods used for cutting special materials for cutting food products, e.g. food slicers
    • 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
    • B60R2022/3427—Seat belt connection on reels
    • 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

Definitions

  • the invention relates to a belt reel for a belt retractor, with an axis of rotation and a reel body which is provided as a reel for a belt webbing and has a first axial circumferential circle.
  • the invention also relates to a belt retractor with a belt reel.
  • Belt retractors with a belt reel are known and are used to provide a seat belt to a vehicle occupant of a motor vehicle.
  • the vehicle occupant can pull the seat belt freely from the belt reel against the action of a winding spring, and the belt reel winds the seat belt again when the vehicle occupant unbuckles, for example.
  • the blocking mechanism is activated, with which the belt reel can be blocked in the frame.
  • the belt reel If the belt reel is blocked in the frame, no further seat belt can be removed from the belt reel until a predefined force level is reached in the seat belt; the belt reel does not twist relative to the frame of the belt retractor if one disregards a minimal yield, which is due to the inherent elasticity of all components in the force flow.
  • the object of the invention is to provide a belt reel and a belt retractor with a belt reel which have improved properties in the case of restraint and thus increase safety.
  • a belt reel for a belt retractor is provided with an axis of rotation and a reel body which is set up as a reel for a belt strap and has a first axial circumferential circle.
  • the coil body also has a radial constriction with a second axial circumferential circle which is arranged in the axial direction in the center of the coil body.
  • the circumference of the second axial circumferential circle is a maximum of 95% of the circumference of the first axial circumferential circle.
  • an axial circumferential circle is a circle with a radius which corresponds to the maximum radial distance of all points on the coil body from the axis of rotation on the corresponding axial section of the coil body. That is to say, the axial circumferential circle forms an envelope beyond which no point on the coil former protrudes at the corresponding axial section.
  • the bobbin is that part of the belt reel that is wrapped at least in sections by the belt strap and thus comprises the winding surface on which the belt strap rests on the bobbin.
  • the radial constriction forms a circumferential groove on the radial outside of the coil body.
  • the belt strap can constrict to the smaller diameter of the circumferential groove.
  • This constriction causes a reduction in the lever acting, which leads to a reduction in the forward displacement in the slide test according to ECE R16 and a reduction in the belt pull-out in the loop load test according to FMVSS 209, when using the same force limiter system.
  • the belt reel has improved properties in the case of restraint, which improves the safety of a vehicle occupant who is protected by a safety system in such a belt reel.
  • the second axial circumferential circle is arranged centrally on the bobbin in the axial direction. This is how the webbing will lace in the axial direction symmetrically towards the center, whereby the force distribution in the belt can be improved.
  • the circumference of the second axial circumferential circle is 80% to 95%, preferably 85% to 90%, of the circumference of the first axial circumferential circle.
  • the constriction has a depth between 1 mm and 3 mm, in particular if the belt reel is intended for a belt strap with a width of 48 mm.
  • the second axial circumferential circle is arranged concentrically to the axis of rotation and / or the constriction is designed to be rotationally symmetrical to the axis of rotation.
  • the constriction has the same properties in all angular positions of the belt reel, whereby the effect of the constriction is provided independently of the angular position of the belt reel and thus safety is reliably improved.
  • the constriction in the axial direction has a width of 10% to 100%, preferably 20% to 40%, of the axial length of the coil body. This design ensures that the belt strap can constrict in a defined manner by being guided in the constriction over a sufficiently large axial area.
  • the constriction can have a concave profile, as a result of which the belt strap is deformed in a manner which, in the event of restraint, favors the distribution of forces in the belt strap.
  • the constriction is symmetrical, in particular mirror-symmetrical, with respect to a plane, in particular the axial center plane of the spool, since this loads the webbing symmetrically in the axial direction when constricting and thus improves the properties in the case of restraint.
  • the bobbin has an axial transition section between the constriction and adjacent axial sections, in which the axial circumferential circle changes continuously in the axial direction from the first axial circumferential circle to the second axial circumferential circle.
  • the axial transition sections are designed without edges. In this way, it is avoided that local stress peaks develop in the belt, which improves the properties in the event of restraint and thus improves safety.
  • a belt retractor with a belt reel according to the invention with the advantages mentioned above is also provided to achieve the above-mentioned object.
  • FIG. 3 shows the belt reel from FIG. 1 in a sectional view through plane A
  • Figure 4 shows the belt reel from Figure 1 in a sectional view through plane B.
  • FIG. 1 shows a belt retractor 10 with a frame 12 and belt reel 14, which is mounted in the frame 12 so as to be rotatable about the axis of rotation R.
  • the belt retractor 10 is part of a seat belt system, in particular in a vehicle.
  • the belt reel 14 has a reel body 16 and two axial side sections 18, 19 which are arranged opposite one another in the axial direction A and which delimit the reel body 16 in the axial direction A.
  • the belt reel 14 can have one or no axial side section 18, 19.
  • the bobbin 16 has a circular cylindrical basic shape and a winding surface 20 which is formed by the radial outer side 22 of the bobbin 16 and on which a belt webbing 24 of a seat belt can be wound and unwound.
  • the coil body 16 has a first axial section 26, a second axial section 28 and a third axial section 30.
  • the radial constriction 32 is a radial recess extending in the circumferential direction U on the radial outer side 22 of the coil former 16, which forms the angled surface 20.
  • the radial constriction 32 is designed to be rotationally symmetrical to the axis of rotation R.
  • the constriction 32 in an alternative embodiment can be designed essentially as desired.
  • the coil body 16 can have radial recesses and / or radial extensions in the axial section of the constriction 32.
  • the first axial section 26 has a first axial circumferential circle 34 (see FIG. 3) with a radius n and the constriction 32 has a second axial circumferential circle 36 with a radius G2 which is smaller than the radius n.
  • the center of the first circumferential circle 34 and the second circumferential circle 36 each lie on the axis of rotation R, whereby the first circumferential circle 34 and the second circumferential circle 36 are arranged concentrically to one another.
  • the third axial section 30 has a third axial circumferential circle 38, which is designed analogously to the first circumferential circle 34. That is, the third circumferential circle has a radius n and a center that lies on the axis of rotation R.
  • the first and third circumferential circles 34, 38 are each the circumferential circle with the largest circumference of the first and third axial section 26, 30, respectively.
  • the second circumferential circle 36 is the circumferential circle with the smallest circumference of the second axial section 28 and the constriction 32.
  • each axial section 26, 28, 30 as well as the constriction 32 can have an individual circumferential circle 34, 36, 38, which can differ from one another, in particular in their radius and / or the position of their center relative to the axis of rotation R.
  • the circumference of the circumferential circles 34, 36, 38 in the corresponding axial section 26, 28, 30 and in the constriction 32 relative to further circumferential circles in the corresponding axial section 26, 28, 30 and in the constriction 32 can be of any size.
  • the radii of the first circumferential circle 34 and of the third circumferential circle 38 are each greater than the radius G2 of the second circumferential circle 36.
  • the circumference of the second circumferential circle 36 is 90% of the circumference of the first circumferential circle 34.
  • the circumference of the second circumferential circle 36 can be between 80% and 95%, preferably between 85% and 90%, of the circumference of the first circumferential circle 34.
  • the circumference of the second circumferential circle 36 may be a maximum of 95% of the circumference of the first circumferential circle 34 so that the constriction 32 has a sufficient depth t so that the belt webbing 24, as described later, can correspondingly constrict to the smaller diameter.
  • the depth t corresponds to the difference between the first radius and the second radius G2 and is 2 mm in the illustrated embodiment.
  • the depth t of the constriction 32 can be between 1 mm and 3 mm.
  • the constriction 32 is provided in the center of the coil body 16 in the axial direction A, ie equidistant from both axial ends of the coil body 16. Furthermore, the second circumferential circle 36 lies in the axial center plane 40t, which in FIG. 2 also forms the section plane AA.
  • the second circumferential circle 36 is arranged in the axial direction A centrally on the coil former 16 and centrally on the winding surface 20.
  • the constriction 32 is designed symmetrically to the axial center plane 40 and has a concave profile (see Figure 4).
  • the bobbin 16 also has axial transition sections 42, 43 which extend from the second circumferential circle 36 to the first axial section 26 and the third axial section 30 and which are designed so that the radii of the axial circumferential circles in these axial transition sections 42, 43 between the second circumferential circle 36 and the first circumferential circle 34 or the third circumferential circle 38 in the axial direction A to increase steadily from G2.
  • the axial transition sections 42, 43 are rounded off and are thus designed without edges in order to provide an advantageous transmission of the forces from the winding surface 20 to the belt strap 24 in the event of restraint.
  • the coil body 16 can have a profile with any desired course.
  • the constriction 32 has a width b in the axial direction A (see FIG. 4) which is 30% of the axial length L of the coil former 16.
  • the belt reel 14 is provided for a belt webbing 24 with a width of 48 mm
  • the length L of the bobbin 16 is 50 mm
  • the width b of the constriction 32 is 15 mm.
  • the width b of the constriction 32 can be between 10% and 100%, in particular between 20% and 40% of the axial length L of the coil body 16.
  • constriction 32 can extend over the entire axial length L of the coil former 16 according to an alternative embodiment.
  • the axial length L of the coil former 16 corresponds at the same time to the axial length of the angular surface 20.
  • the coil body 16 also has assembly pockets 44 and an axial gap 46 dividing the coil body 16, which interrupt the winding surface 20.
  • the coil former 16 can have no or any number of geometric elements such as pockets, gaps and / or projections.
  • the coil body 16 can have any basic shape.
  • the spool 16 can have a radial step in the circumferential direction, to which one end of the belt strap 24 is attached, so that the belt strap 24 merges tangentially into the second winding at the step.
  • the belt reel 14 has a cavity 48 (see FIG. 4) which extends along the axis of rotation R and in which a rod-shaped or tubular force-limiting element can be arranged, which is part of a force-limiting device of the belt retractor 10.
  • the belt retractor 10 can have any desired force-limiting elements. This means that the belt reel 14 is compatible with the usual force-limiting devices and can be used together with these in a belt retractor 10.
  • the constriction 32 leads to the belt webbing 24 partially wound on the spool 16 constricting at least in sections to the smaller diameter of the second circumferential circle 36.
  • This constriction has the effect that the effective lever is reduced, in particular on the radius G2, and thus the forces of the belt webbing 24 acting on the belt reel 14 are reduced.
  • a belt reel 14 which leads to a reduction in the forward displacement in the slide test according to ECE R16 and a reduction in the belt webbing extension in the loop load test according to FMVSS 209.
  • the belt reel has improved properties in the case of restraint, which improves the safety of a vehicle occupant who is protected by a safety system in such a belt reel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Automotive Seat Belt Assembly (AREA)

Abstract

L'invention concerne une bobine de ceinture de sécurité (14) pour un enrouleur de ceinture de sécurité (10), comprenant un axe de rotation (R) et un corps de bobine (16) servant de bobine pour une bande de ceinture de sécurité (24) et présentant une première circonférence axiale (34). Le corps de bobine (16) comporte par ailleurs un rétrécissement radial (32) présentant une deuxième circonférence axiale (36), le rétrécissement (32) étant disposé de façon centrale sur le corps de bobine (16) dans la direction axiale (A), la valeur de la deuxième circonférence axiale (36) étant au maximum égale à 95 % de la valeur de la première circonférence axiale (36). L'invention concerne en outre un enrouleur de ceinture de sécurité (10) comportant une telle bobine de ceinture de sécurité (14).
PCT/EP2020/066576 2019-06-18 2020-06-16 Bobine de ceinture de sécurité et enrouleur de ceinture de sécurité comportant une bobine de ceinture de sécurité WO2020254300A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202080052055.0A CN114126932A (zh) 2019-06-18 2020-06-16 安全带卷轴和包括安全带卷轴的安全带卷收器
PCT/EP2020/066576 WO2020254300A1 (fr) 2019-06-18 2020-06-16 Bobine de ceinture de sécurité et enrouleur de ceinture de sécurité comportant une bobine de ceinture de sécurité
US17/618,485 US20220234539A1 (en) 2019-06-18 2020-06-16 Belt reel and also belt retractor having a belt reel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018116448.6 2019-06-18
PCT/EP2020/066576 WO2020254300A1 (fr) 2019-06-18 2020-06-16 Bobine de ceinture de sécurité et enrouleur de ceinture de sécurité comportant une bobine de ceinture de sécurité

Publications (1)

Publication Number Publication Date
WO2020254300A1 true WO2020254300A1 (fr) 2020-12-24

Family

ID=74036796

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/066576 WO2020254300A1 (fr) 2019-06-18 2020-06-16 Bobine de ceinture de sécurité et enrouleur de ceinture de sécurité comportant une bobine de ceinture de sécurité

Country Status (3)

Country Link
US (1) US20220234539A1 (fr)
CN (1) CN114126932A (fr)
WO (1) WO2020254300A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10129414A (ja) * 1996-10-24 1998-05-19 Ashimori Ind Co Ltd シートベルトリトラクター用エネルギー吸収部材及びその取付け構造
DE102008000981A1 (de) * 2008-04-03 2009-10-08 Robert Bosch Gmbh Gurtaufrolleinheit sowie Verfahren zum Aufrollen von mindestens einem Gurtband sowie Gurtsystem für ein Insassenschutzsystem in einem Fahrzeug mit mindestens einer solchen Gurtaufrolleinheit
US20120025001A1 (en) * 2010-07-27 2012-02-02 Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho Webbing take-up device
WO2017011304A1 (fr) * 2015-07-13 2017-01-19 Key Safety Systems, Inc. Rétracteur avec insert de bobine écrasable

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030003773A (ko) * 2001-07-02 2003-01-14 현대자동차주식회사 자동차용 로드리미터
DE102008023036B4 (de) * 2008-05-09 2019-08-08 Joyson Safety Systems Germany Gmbh Gurtaufroller mit axialer Sicherung und Verfahren zu dessen Herstellung
US9132801B2 (en) * 2009-07-15 2015-09-15 Autoliv Development Ab Seat belt retractor and method for assembling spindle of seat belt retractor
JP5384438B2 (ja) * 2010-06-18 2014-01-08 株式会社東海理化電機製作所 ウエビング巻取装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10129414A (ja) * 1996-10-24 1998-05-19 Ashimori Ind Co Ltd シートベルトリトラクター用エネルギー吸収部材及びその取付け構造
DE102008000981A1 (de) * 2008-04-03 2009-10-08 Robert Bosch Gmbh Gurtaufrolleinheit sowie Verfahren zum Aufrollen von mindestens einem Gurtband sowie Gurtsystem für ein Insassenschutzsystem in einem Fahrzeug mit mindestens einer solchen Gurtaufrolleinheit
US20120025001A1 (en) * 2010-07-27 2012-02-02 Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho Webbing take-up device
WO2017011304A1 (fr) * 2015-07-13 2017-01-19 Key Safety Systems, Inc. Rétracteur avec insert de bobine écrasable

Also Published As

Publication number Publication date
US20220234539A1 (en) 2022-07-28
CN114126932A (zh) 2022-03-01

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