WO2008061366A1 - Dispositif anti-claquement dans un verrou - Google Patents

Dispositif anti-claquement dans un verrou Download PDF

Info

Publication number
WO2008061366A1
WO2008061366A1 PCT/CA2007/002109 CA2007002109W WO2008061366A1 WO 2008061366 A1 WO2008061366 A1 WO 2008061366A1 CA 2007002109 W CA2007002109 W CA 2007002109W WO 2008061366 A1 WO2008061366 A1 WO 2008061366A1
Authority
WO
WIPO (PCT)
Prior art keywords
striker
ratchet
latch assembly
bumper
housing
Prior art date
Application number
PCT/CA2007/002109
Other languages
English (en)
Inventor
Anjan Nayani
Frank Stoof
Original Assignee
Magna Closures Inc.
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 Magna Closures Inc. filed Critical Magna Closures Inc.
Publication of WO2008061366A1 publication Critical patent/WO2008061366A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B77/00—Vehicle locks characterised by special functions or purposes
    • E05B77/36—Noise prevention; Anti-rattling means
    • E05B77/38—Cushion elements, elastic guiding elements or holding elements, e.g. for cushioning or damping the impact of the bolt against the striker during closing of the wing
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B77/00—Vehicle locks characterised by special functions or purposes
    • E05B77/36—Noise prevention; Anti-rattling means
    • E05B77/40—Lock elements covered by silencing layers, e.g. coatings
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B85/00—Details of vehicle locks not provided for in groups E05B77/00 - E05B83/00
    • E05B85/20—Bolts or detents
    • E05B85/24—Bolts rotating about an axis
    • E05B85/26—Cooperation between bolts and detents

Definitions

  • the invention relates to a latch assembly for releasably securing a motor vehicle door in a closed position. More particularly, the invention is related to a latch assembly having an anti-chuck feature for preventing door chuck while maintaining low door opening and closing efforts.
  • Motor vehicles include hinged doors for selectively providing access to an interior passenger compartment or cargo compartment.
  • a latch assembly is coupled between one of the doors and a motor vehicle body foi releasably securing the door in a closed position. More specifically, the latch assembly selectively engages a striker fixedly secured to the motor vehicle body.
  • the latch assembly includes a ratchet and a pawl. The ratchet is movable between a latched position, in which the ratchet retains the striker, and an unlatched position, in which the ratchet releases the striker.
  • the pawl is movable between a ratchet engaged position, in which the pawl is engaged with the ratchet and holds it in he latched position, and a ratchet released position, in which the pawl is disengaged from the ratchet and the ratchet moves to the unlatched position and releases the striker.
  • the latch assembly also includes a striker bumper to receive and absorb an impact from the striker when the door is closed, thus reducing stresses on the latch assembly and closing noise.
  • a striker bumper to receive and absorb an impact from the striker when the door is closed, thus reducing stresses on the latch assembly and closing noise.
  • the door tends to rattle causing noise or door chuc c, which is considered highly undesirable based on vehicle noise, vibration, and harshness standards.
  • Door chuck is defined as back and forth movement of the strike: within the latch assembly.
  • a latch assembly s provided for selectively engaging a striker to latch a door to a motor vehicle body.
  • the latch assembly includes a housing having an aperture extending between an open end for receiving the striker and an opposing closed end.
  • a ratchet is rotatably mounted to the housing for movement between an unlatched position and a latched position engaging the striker.
  • a pawl is pivotally mounted to the housing and eigages the ratchet to retain the ratchet in the latched position.
  • a striker bumper is mounted at the opposing closed end of the aperture and includes a bulb-shaped end for absorbing a striker impact. The bulb-shaped end of the striker bumper includes an internal cavity extending therethrough.
  • a pillow bumper is mounted to the ratchet and compressingly engages the housing when the ratchet rotates past the latched position to an over-travel position.
  • the pillow bumper prevents further movement of the striker within the latch assembly thereby absorbing the energy and sound of the striker against the latch assembly.
  • Figure 1 is a fragmentary, perspective view of a motor vehicle including a latch assembly fixedly mounted along a door according to the invention
  • Figure 2 is a perspective view of the latch assembly including a ratchet in an unlatched position
  • Figure 3 is a perspective view of the latch assembly including the ratchet in an intermediate latched position retaining the striker;
  • Figure 4 is a perspective view of the latch assembly including the ratchet in a latched position retaining the striker;
  • Figure 5 is a perspective view of the latch assembly with the ratchet removed to show a striker bumper
  • Figure 6 is a perspective view of the latch assembly with the ratchet removed to show the striker compressing the striker bumper;
  • Figure 7 is a perspective view of the latch assembly with the ratchet in an over-travel position compressing a pillow bumper.
  • a motor vehicle generally shown at 10, includes a body portion 12 and a door 14 pivotally hinged to the body portion 12 for movement between an open position and a closed position.
  • the door 14 is shown in the open position.
  • a latch assembly is fixedly mounted to the door 14 for selectively engaging a striker 18 mounted along the body portion 12 of the motor vehicle 10. The latch assembly 16 engages the striker 18 when the door 14 is closed.
  • the latch assembly 16 is shown with a front faceplate (not shown) removed for illustration.
  • the latch assembly 16 includes a housing 20 having a first side 22, and an opposing second side 24 mounted against the door 14.
  • the housing 20 includes relatively thin peripheral walls 26a, 26b hat extend along the first side 22 of the housing 20 and protrude perpendicularly therefrom to define a cavity 28 having a first shelf portion 30 and a second shelf portion 32.
  • a ratchet 34 and pawl 36 are disposed within the cavity 28.
  • a frusto-trapezoidal aperture generally shown at 38, often referred to as a "fishmouth," bisects the first side 22 of the housing 20.
  • the aperture 38 is designed to receive the striker 18 therein.
  • a seal 40 preferably formed from a flexible rubber iiaterial, is mounted or otherwise integrally formed with the housing 20 at an open end 42 of the aperture 38.
  • An elastomeric or rubber striker bumper 44 is fixedly mounted at an opposing closed end 46 of the aperture 38 for receiving and absorbing an impact from the striker 18 when the door 14 is closed, thereby reducing stresses on the latch assembly 16 and reducing noise.
  • the striker bumper 44 is preferably made from a thermoplastic elastomer such as that sold under the trademark SANTOPRENE 65 and is a bulb-type design that provides interference with the striker 18 while at the same time maintaining low opening and closing efforts of the door 14. More specifically, the striker bumper 44 includes a bulbous end 48 having an internal, generally cylindrical cavity or slot 50 extending therethrough.
  • the slot 50 extend; generally perpendicular to the direction of travel of the striker 18.
  • a protrusion 52 formed along an inner wall of the slot 50 extends axially therethrough. The protr ⁇ sion 52 is disposed along the inner wall of the slot 50 on a side toward the closed end 46 of the aperture 38.
  • the ratchet 34 and pawl 36 are preferably constructed from metal and partially covered with a plastic material in order to reduce noise during latch operation. Certain portions that are subject to wear, such as a ratchet tooth 54 and a pawl tooth 56, shown in Figures 2-4 and 7, are not covered in plastic.
  • the pawl 36 includes a pawl tail 58 for optimizing its center of gravity.
  • the ratchet 34 is rotatably mounted to the first side 22 of the housing
  • a groove 62 in the first shelf portion 30 houses a first coil compression spring 64.
  • a tab 66 illustrated with hidden lines, protrudes from an underside of the ratchet 34 and engages one end of the first spring 64. Another end of the first spring 64 engages an end wall 68 of the groove 62.
  • the ratchet tooth 54 engages a shoulder 70 of the housing 20 to stop the ratchet 34 in the unlatched position.
  • the shoulder 70 is located adjacent the open end 42 of the aperture 38.
  • the striker 18 enters a moutr 71 of the ratchet 34 and rotates the ratchet 34 into the intermediate latched position, wherein the pawl tooth 56 engages a hook portion 72 of the ratchet 34, as shown in Figure 3.
  • the ratchet 34 retains the striker 18 loosely.
  • the striker 18 rotates the ratchet 34 into Ihe latched position, wherein the pawl tooth 56 engages the ratchet tooth 54, as show i in Figure 4.
  • the striker 18 In the latched position the striker 18 abuts and partially compresses the bulbous end 48 of the striker bumper 44.
  • the striker 18 can compress the striker bumper 44 approximately one millimeter further, thereby causing the ratchet 34 to rotate past the latched position until a pillow bumper 74 mounted on or otherwise integrally formed along a peripheral edge 75 of the -atchet 34 compressingly engages the peripheral wall 26a of the housing 20 and becomes a hard stop to prevent further movement of the striker 18.
  • a pillow bumper 74 mounted on or otherwise integrally formed along a peripheral edge 75 of the -atchet 34 compressingly engages the peripheral wall 26a of the housing 20 and becomes a hard stop to prevent further movement of the striker 18.
  • the pillow bumper 74 is preferably made from a polyester elas.omer such as that sold under the trademark HYTREL, which has a different "k " ' value or spring constant than the striker bumper 44.
  • the pillow bumper 74 includes an internal cavity or slot 76 extending therethrough.
  • the pawl 36 is pivotally mounted to the first side 22 of the lousing 20 via a pin 78 for movement between a ratchet released position and a ratchet engaged position.
  • a groove 80 in the second shelf portion 32 houses a second coil compression spring 82.
  • a shoulder 84 of the pawl 36 engages one end of the second spring 82.
  • Another end of the second spring 82 engages an end wall 86 of the groove 80, so that the second spring 82 biases the pawl 36 in the counterclockwise direction toward the ratchet engaged position.
  • the striker 18 In operation, as the door 14 is being closed, the striker 18 enters the open end 42 of the aperture 38. The striker 18 then enters the mouth 71 of the ratchet 34, engages the hook portion 72, and rotates the ratchet 34 against the bias of the first spring 64 in a clockwise direction (when viewed from Figure 2) from the unlatched position, through the intermediate latched position, and finally into the latched position. As the ratchet 34 rotates toward the latched position, the striker 18 abuts the bulbous end 48 of the striker bumper 44, which deflects inward due to the slot 50 formed therein. The striker bumper 44 absorbs the energy and sound of th; striker 18 engaging the latch assembly 10.
  • the pawl 36 pivots in the clockwise direction (when viewed from Figure 2) and the pawl tooth 56 rides along the peripheral edge 75 of the hook portion 72 of the ratchet 34.
  • the pawl tooth 56 engages the hook portion 72 when the ratchet 34 is in the intermediate latched position, as shown in Figure 3.
  • the pawl tooth 56 rides along the peripheral edge 75 of the ratchet tooth 54 until the pawl tooth 56 engages the ratchet tooth 54 under the bias of the second spring 82, thereby maintaining the ratchet 34 in the latched position, as shown in Figure 4.
  • the striker 18 When captured in the mouth 71 of the ratchet 34, the striker 18 is biased against the ratchet 34 by the striker bumper 44. During door slam or vibration conditions, the striker 18 can compress the striker bumper 44 approximately one millimeter farther than when the ratchet 34 is in the latched position. Thus, causing the ratchet 34 to rotate in the clockwise direction (when viewed from Figu r e 4) to the over-travel position, shown in Figure 7, wherein the pillow bumper 74 compressingly engages the peripheral wall 26a to prevent further movement of the striker 18. Therefore, the latch assembly 10 absorbs the energy and sound of the striker 18 when the door is closed, and during door slam and vibration conditions.

Landscapes

  • Lock And Its Accessories (AREA)

Abstract

L'invention concerne un ensemble de verrou conçu pour s'engager sélectivement dans une gâche afin de fixer de façon amovible une porte sur une carrosserie de véhicule automobile. L'ensemble de verrou comprend un logement et un cliquet monté de façon à tourner sur le logement pour passer d'une position non verrouillée à une position verrouillée retenant la gâche. L'ensemble de verrou comprend également une butée de gâche montée sur le logement. La butée de gâche possède une extrémité renflée comportant une cavité interne destinée à absorber l'impact de la gâche et à pousser la gâche contre le cliquet lorsque le cliquet est mis en position verrouillée, ce qui évite le bruit de la gâche contre le cliquet.
PCT/CA2007/002109 2006-11-21 2007-11-21 Dispositif anti-claquement dans un verrou WO2008061366A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US86042806P 2006-11-21 2006-11-21
US60/860,428 2006-11-21

Publications (1)

Publication Number Publication Date
WO2008061366A1 true WO2008061366A1 (fr) 2008-05-29

Family

ID=39429345

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA2007/002109 WO2008061366A1 (fr) 2006-11-21 2007-11-21 Dispositif anti-claquement dans un verrou

Country Status (1)

Country Link
WO (1) WO2008061366A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013116943A1 (fr) * 2012-02-10 2013-08-15 Multimatic Inc. Butoir de loquet rétractable
CN103967355A (zh) * 2013-02-04 2014-08-06 因特瓦产品有限责任公司 锁闩机构
CN108930458A (zh) * 2017-05-25 2018-12-04 麦格纳覆盖件有限公司 包括具有自锁定棘齿的闩锁机构的车辆闩锁组件
WO2020041171A1 (fr) * 2018-08-20 2020-02-27 GM Global Technology Operations LLC Mécanisme de verrouillage

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848911A (en) * 1972-03-08 1974-11-19 Kiekert Soehne Arn Motor vehicle door latch
US3876238A (en) * 1972-11-03 1975-04-08 Kiekert Soehne Arn Two-part motor vehicle door latch
US4165112A (en) * 1977-06-04 1979-08-21 Arn. Kiekert Sohne Motor-vehicle door latch
US4351868A (en) * 1981-04-15 1982-09-28 Toyoda Gosei Co., Ltd. Molding
US5309745A (en) * 1991-09-25 1994-05-10 Robert Bosch Gmbh Interlocking device for doors of a motor vehicle
US20060131894A1 (en) * 2003-05-08 2006-06-22 Kiekert Aktiengesellschaftkettwiger Str. Motor vehicle door lock

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848911A (en) * 1972-03-08 1974-11-19 Kiekert Soehne Arn Motor vehicle door latch
US3876238A (en) * 1972-11-03 1975-04-08 Kiekert Soehne Arn Two-part motor vehicle door latch
US4165112A (en) * 1977-06-04 1979-08-21 Arn. Kiekert Sohne Motor-vehicle door latch
US4351868A (en) * 1981-04-15 1982-09-28 Toyoda Gosei Co., Ltd. Molding
US5309745A (en) * 1991-09-25 1994-05-10 Robert Bosch Gmbh Interlocking device for doors of a motor vehicle
US20060131894A1 (en) * 2003-05-08 2006-06-22 Kiekert Aktiengesellschaftkettwiger Str. Motor vehicle door lock

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013116943A1 (fr) * 2012-02-10 2013-08-15 Multimatic Inc. Butoir de loquet rétractable
CN104093625A (zh) * 2012-02-10 2014-10-08 穆尔蒂马蒂奇公司 可缩回的锁定缓冲块
US9121204B2 (en) 2012-02-10 2015-09-01 Multimatic Inc. Retractable latch bumper
CN104093625B (zh) * 2012-02-10 2016-09-28 穆尔蒂马蒂奇公司 可缩回的锁定缓冲块
US9719571B2 (en) 2012-02-10 2017-08-01 Multimatic Inc. Retractable latch bumper
CN103967355A (zh) * 2013-02-04 2014-08-06 因特瓦产品有限责任公司 锁闩机构
CN108930458A (zh) * 2017-05-25 2018-12-04 麦格纳覆盖件有限公司 包括具有自锁定棘齿的闩锁机构的车辆闩锁组件
US11377880B2 (en) 2017-05-25 2022-07-05 Magna Closures Inc. Vehicular latch assembly with latch mechanism having self-locking ratchet
WO2020041171A1 (fr) * 2018-08-20 2020-02-27 GM Global Technology Operations LLC Mécanisme de verrouillage
US11220847B2 (en) 2018-08-20 2022-01-11 GM Global Technology Operations LLC Latch mechanism

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