WO2002006093A1 - Energy absorbing seat belt retractor - Google Patents
Energy absorbing seat belt retractor Download PDFInfo
- Publication number
- WO2002006093A1 WO2002006093A1 PCT/US2001/014019 US0114019W WO0206093A1 WO 2002006093 A1 WO2002006093 A1 WO 2002006093A1 US 0114019 W US0114019 W US 0114019W WO 0206093 A1 WO0206093 A1 WO 0206093A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- spool
- seat belt
- force
- locking mechanism
- torsion bar
- Prior art date
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
-
- 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
- B60R22/28—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices
- B60R2022/283—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices using tearing or scoring of material
-
- 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
- B60R2022/286—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices using deformation of material
- B60R2022/287—Safety belts or body harnesses in vehicles incorporating energy-absorbing devices using deformation of material of torsion rods or tubes
Definitions
- the invention generally relates to seat belt retractors and more particularly to that class of seat belt retractors having an energy absorbing mechanism.
- a seat belt retractor with an energy absorbing mechanism permits the seat belt to be controllably protracted from the retractor spool as a mechanism within the spool generates a determinable, somewhat level or constant, reaction force or torque to oppose the protraction. This action permits the vehicle occupant to move forwardly during a crash and lessens the crash forces exerted on the vehicle occupant.
- US 6 105 894 suggests the use of an additional energy- absorbing element such as shear pins, which extend from an end face of a spool flange and connect the spool to the locking mechanism.
- a seat belt retractor comprises: a spool about which a seat belt is wound; a locking mechanism at least initially locking the spool against rotation and a primary force-limiting mechanism, such as a torsion bar for permitting the spool to rotate in a controlled manner subsequent to the locking of the spool and a secondary force-limiting mechanism located within a recess of the spool and comprised from portions of the spool and an adjacent portion of the locking mechanism for increasing the restraining force on the seat belt before the primary force-limiting mechanism becomes effective.
- The' torsion bar is at least partially located within a spool bore and is connected at one end to the spool and at its other end to the locking mechanism.
- the secondary locking mechanism includes a recess, keyway or slot and a projecting, breakable tab formed on one of a spool bore and an interlocking part of the locking mechanism.
- Fig. 1 is a cross-sectional view showing the major components of a seat belt retractor incorporating the present invention.
- Fig. 2a is an end view of part of a locking mechanism.
- Fig. 2b is a side view of part of the locking mechanism.
- Fig. 2c is a cross-sectional view showing an alternate embodiment of the invention in which the placement of slots and pins are reverse.
- Figs. 3a, 3b and 3c show a cross-sectional, end plan and side plan view of a spool.
- Fig. 4 is an assembly view showing an isometric view of the spool and locking mechanism (the lock wheel is not shown) .
- Fig. 5 shows various force/time (deflection) curves .
- Figs. 1-4 illustrate the major components of a seat belt retractor incorporating the present invention.
- the seat belt retractor 50 comprises a U- shaped frame 52 having openings 52a, 52b to support a spool and locking sub-assembly 54. These openings act as bearings.
- the spool and locking sub-assembly comprises a spool 56, a torsion bar 58, and a lock mechanism 60.
- One end 62 of the torsion bar 58 includes a plurality of splines 64, which drivingly engage a mating plurality of splines 66 formed on the torsion bar (in a known manner) .
- the torsion bar 68 further includes an additional extension 84, which rotates with the spool prior to activation of the torsion bar and serves as part of a known type of web sensor 86 that is schematically indicated.
- the lock mechanism 60 includes a ratchet wheel 86, which forms a cavity 88.
- the various parts of the web sensor such as a web sensor pawl, are located within the cavity 88 (also shown in Fig. 4) formed by the ratchet wheel.
- a lock wheel 92 Secured to the body 90 of the lock mechanism is a lock wheel 92 having a plurality of teeth 94.
- a lock pawl 96 shown schematically, is rotationally mounted to the frame and is brought into engagement with one or more teeth 94, of the low wheel, upon operation of the web sensor or vehicle sensor 98 in a known manner.
- many seat belt retractors include a lock ring (not shown) that is rotatable relative to the retractor's shaft (in this case, the torsion bar) ; the activation of the web sensor or of a cooperating vehicle sensor connects this lock ring to the retractor shaft. This action causes the lock ring to rotate a small amount and in so doing moves the lock pawl into engagement with the lock wheel.
- the web sensor includes an inertia disk loosely mounted to the extension 84 and a web sensor pawl (not shown) rotatably mounted to a pin 87 of the ratchet wheel 86, which in response to rapid protraction of the seat belt from the retractor spool moves to engage closely spaced teeth on the lock ring, thereby coupling the lock ring to the pawl and to the retractor shaft.
- the vehicle sensor 98 which can be carried by the lock ring, also includes a vehicle sensor pawl 98a, which is moved to an activated position by a movable mass (not shown) when the vehicle experiences a rapid deceleration. In the activated position the vehicle sensor pawl 98a engages the teeth 86a of the ratchet wheel 86, thereby coupling the lock ring to the retractor shaft.
- Fig. 4 shows that the central bore 100 of the spool 56 includes at least one slot (also referred to as a keyway) 102.
- the body 90 of mechanism 60 includes a plurality of projections 104 that are received within the keyways 102.
- the projections 104 and keyways 102 drivingly connect the interior of the spool to the exterior of the body 90 of the mechanism 60.
- the body 90 includes a narrow diameter portion 90a that is received within the bore 100 of the spool and a larger diameter portion 90b that is received within and stabilized by opening, i.e. bearing, 52b in the frame.
- the spool also includes two bores 110 that are perpendicular to bore 100.
- a tool is positioned within bores 110 and, with the application of force, locally deforms the spool so that the splines 66 of the spool remain in driving contact with the splines 64 of the torsion bar.
- Other means can be used to secure the torsion bar to the spool.
- the spool 56 further includes a provision to receive an end of a seat belt 130.
- a provision includes a known slot 132 into which an end of the belt 130 is received. Retention may be enhanced by first securing the end of the belt about a pin that fits within the slot 132.
- the belt is wound about the spool body 134 and retained between optional flanges 136a, 136b.
- the vehicle and/or web sensor connect the lock ring (not shown) to the shaft (torsion bar) which causes the lock ring to rotate a small amount.
- a part of the lock ring is operatively connected to the lock pawl 96 and the rotation of the lock ring moves the lock pawl 96 into engagement with the teeth 94 of the lock wheel 92, thereby at least initially, prohibiting seat belt webbing from protracting from the spool 56.
- crash forces are exerted on the seat belt by the vehicle occupant, tending to try to pull the seat belt in the direction of arrow F (see Fig. 1) off from the spool 56.
- a reaction force such as a reaction force of magnitude 202 is generated as shown in Fig. 5. Because of the higher reaction forces, indicated by numeral 202a in Fig. 5, generated by the slots and the pins, the vehicle occupant's forward motion will be forcefully opposed and the vehicle occupant's motion restricted.
- sheared-off projections 104 are encapsulated within the spool and will not impede the functionality of the spool.
- Fig. 1 show test data and more particularly belt force and a function of time (which is illustrative of belt protraction) .
- Trace 200 shows comparative test data for a similar seat belt retractor that does not include the slots and pins.
- Fig. 2c shows an embodiment in which the slots are formed in the lock mechanism and the shear pins are incorporated into the spool.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002512005A JP2004504201A (en) | 2000-07-14 | 2001-05-01 | Energy absorption type seat belt retractor |
EP01930979A EP1301378A1 (en) | 2000-07-14 | 2001-05-01 | Energy absorbing seat belt retractor |
BR0111997-4A BR0111997A (en) | 2000-07-14 | 2001-05-01 | Seat belt retractor |
KR10-2003-7000491A KR20030021256A (en) | 2000-07-14 | 2001-05-01 | Energy absorbing seat belt retractor |
AU2001257465A AU2001257465A1 (en) | 2000-07-14 | 2001-05-01 | Energy absorbing seat belt retractor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US61672800A | 2000-07-14 | 2000-07-14 | |
US09/616,728 | 2000-07-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002006093A1 true WO2002006093A1 (en) | 2002-01-24 |
Family
ID=24470720
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/013880 WO2002005675A1 (en) | 2000-07-14 | 2001-05-01 | Illuminated buckle and tongue |
PCT/US2001/014019 WO2002006093A1 (en) | 2000-07-14 | 2001-05-01 | Energy absorbing seat belt retractor |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/013880 WO2002005675A1 (en) | 2000-07-14 | 2001-05-01 | Illuminated buckle and tongue |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1301378A1 (en) |
JP (1) | JP2004504201A (en) |
KR (1) | KR20030021256A (en) |
CN (1) | CN1440338A (en) |
AU (2) | AU2001259261A1 (en) |
BR (1) | BR0111997A (en) |
WO (2) | WO2002005675A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4379783B2 (en) * | 2003-09-19 | 2009-12-09 | タカタ株式会社 | Seat belt retractor and seat belt device provided with the same |
DE10344435B4 (en) * | 2003-09-25 | 2006-06-01 | Autoliv Development Ab | Self-locking belt retractor |
UA90864C2 (en) * | 2004-09-09 | 2010-06-10 | Ромарк Лебораториз, Л.К. | Halogenated benzamide derivatives |
JP4748711B2 (en) * | 2005-06-06 | 2011-08-17 | タカタ株式会社 | Seat belt mounting device |
JP2007014359A (en) | 2005-06-15 | 2007-01-25 | Takata Corp | Buckle device and seat belt apparatus |
GB2428219A (en) * | 2005-07-09 | 2007-01-24 | Ryan Thorneild Ennis | Seat belt device |
CN104742856A (en) * | 2013-12-30 | 2015-07-01 | 常州博万达汽车安全设备有限公司 | Safety belt winder |
US9403479B2 (en) | 2014-08-27 | 2016-08-02 | Ford Global Technologies, Llc | Vehicle and vehicle seat belt system |
CN107757550B (en) * | 2017-12-08 | 2024-02-23 | 沈阳金杯锦恒汽车安全系统有限公司 | Pretension force-limiting type automobile safety belt retractor |
US10501049B1 (en) | 2018-07-31 | 2019-12-10 | Ford Global Technologies, Llc | Seatbelt assembly with color coded lighting feature |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19517440A1 (en) * | 1994-05-25 | 1995-11-30 | Volkswagen Ag | Safety belt retractor for vehicles with overload protection |
WO1996032303A1 (en) * | 1995-04-14 | 1996-10-17 | Autoliv Development Ab | Belt roller with damped force limiter |
EP0888939A1 (en) * | 1997-07-04 | 1999-01-07 | Alliedsignal Limited | Retractor |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2619343A1 (en) * | 1976-04-30 | 1977-11-17 | Geb Wilke Edith Rutzki | Illuminated seat belt lock - has luminous substance enclosed in buckle to make it visible in darkness |
DE9014525U1 (en) * | 1990-10-19 | 1991-01-17 | Osthoff, Hans-Werner, Prof. Dr.Jur., 8135 Soecking, De |
-
2001
- 2001-05-01 WO PCT/US2001/013880 patent/WO2002005675A1/en active Application Filing
- 2001-05-01 WO PCT/US2001/014019 patent/WO2002006093A1/en not_active Application Discontinuation
- 2001-05-01 AU AU2001259261A patent/AU2001259261A1/en not_active Abandoned
- 2001-05-01 AU AU2001257465A patent/AU2001257465A1/en not_active Abandoned
- 2001-05-01 KR KR10-2003-7000491A patent/KR20030021256A/en not_active Application Discontinuation
- 2001-05-01 EP EP01930979A patent/EP1301378A1/en not_active Withdrawn
- 2001-05-01 BR BR0111997-4A patent/BR0111997A/en not_active IP Right Cessation
- 2001-05-01 JP JP2002512005A patent/JP2004504201A/en not_active Withdrawn
- 2001-05-01 CN CN01812242A patent/CN1440338A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19517440A1 (en) * | 1994-05-25 | 1995-11-30 | Volkswagen Ag | Safety belt retractor for vehicles with overload protection |
WO1996032303A1 (en) * | 1995-04-14 | 1996-10-17 | Autoliv Development Ab | Belt roller with damped force limiter |
US6105894A (en) | 1995-04-14 | 2000-08-22 | Autoliv Development Ab | Belt roller with damped force limiter |
EP0888939A1 (en) * | 1997-07-04 | 1999-01-07 | Alliedsignal Limited | Retractor |
Also Published As
Publication number | Publication date |
---|---|
EP1301378A1 (en) | 2003-04-16 |
CN1440338A (en) | 2003-09-03 |
BR0111997A (en) | 2003-05-20 |
WO2002005675A1 (en) | 2002-01-24 |
AU2001257465A1 (en) | 2002-01-30 |
KR20030021256A (en) | 2003-03-12 |
AU2001259261A1 (en) | 2002-01-30 |
JP2004504201A (en) | 2004-02-12 |
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