EP0721538B1 - Fallenschloss für abschliessbares karosserieteil - Google Patents

Fallenschloss für abschliessbares karosserieteil Download PDF

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Publication number
EP0721538B1
EP0721538B1 EP94928664A EP94928664A EP0721538B1 EP 0721538 B1 EP0721538 B1 EP 0721538B1 EP 94928664 A EP94928664 A EP 94928664A EP 94928664 A EP94928664 A EP 94928664A EP 0721538 B1 EP0721538 B1 EP 0721538B1
Authority
EP
European Patent Office
Prior art keywords
striker
forkbolt
pawl
mode
rotation
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.)
Expired - Lifetime
Application number
EP94928664A
Other languages
English (en)
French (fr)
Other versions
EP0721538A1 (de
Inventor
Nigel Spurr
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.)
Boeing North American Inc
Original Assignee
Rockwell International Corp
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 Rockwell International Corp filed Critical Rockwell International Corp
Publication of EP0721538A1 publication Critical patent/EP0721538A1/de
Application granted granted Critical
Publication of EP0721538B1 publication Critical patent/EP0721538B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B83/00—Vehicle locks specially adapted for particular types of wing or vehicle
    • E05B83/16—Locks for luggage compartments, car boot lids or car bonnets
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B81/00—Power-actuated vehicle locks
    • E05B81/12—Power-actuated vehicle locks characterised by the function or purpose of the powered actuators
    • E05B81/20—Power-actuated vehicle locks characterised by the function or purpose of the powered actuators for assisting final closing or for initiating opening
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B81/00—Power-actuated vehicle locks
    • E05B81/02—Power-actuated vehicle locks characterised by the type of actuators used
    • E05B81/04—Electrical
    • E05B81/06—Electrical using rotary motors
    • 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
    • E05B85/02—Lock casings

Definitions

  • This invention relates to latches for securing the position of a door according to the preamble of claim 1.
  • a typical vehicle door includes a latch which defines three modes of operation.
  • a first mode is a latched mode in which a striker forkbolt is engaged to a striker.
  • a second mode of operation is an open mode of operation in which the striker forkbolt and striker are released and function independently to provide access to a vehicle.
  • a third mode of operation is one in which the striker forkbolt and striker are partially engaged allowing limited motion of a door which has been partially closed or which has been released incompletely from a latched condition to a mode of operation referred to as safety or secondary mode.
  • the sequence of opening a vehicle door in which the door is rotatable about a horizontally oriented axis such as a deck lid includes a first step of releasing the vehicle door from a latched mode of operation, whereupon a weatherstrip imparts a force against the door causing an upwardly directing motion thereof. Upon reaching the limit of such displacement, the door returns to a position resting against the weatherstrip, and in some situations, engaging the striker forkbolt and striker sufficiently to reach a safety mode of operation. A vehicle operator inside such a vehicle attempting to open the door will find the door in a safety mode of operation, and consequently impossible to open.
  • GB-A-2 155 535 discloses a latch according to the preamble of claim 1 for a vehicle door which offers a sequence of operations in which the door is first released from a latched condition to an ajar condition in which no safety mode of operation is available. Subsequent to the ajar condition the vehicle door may then pass to an open position in which the safety mode of operation is reset and may be utilized upon subsequent attempts to close the door.
  • the latch comprises several levers which may contact each other to swivel latches in order to change the mode of operation.
  • Object of the present invention is to provide for a latch which ensures a safe closure of the door.
  • the present invention includes a device which establishes a sequence for the modes of operation of a door.
  • the sequence is latched, ajar, open and safety.
  • the modes of operation are achieved by the interaction of a striker and a striker forkbolt.
  • the striker forkbolt is secured to the liftgate and the striker is secured to the fixed structure.
  • the striker forkbolt is rotatable about a first axis to various predetermined angular positions.
  • the striker forkbolt may be restricted to various rotational positions to accomplish one of the four modes of operation.
  • a first angular restriction of the striker forkbolt in which the striker forkbolt is engaged with a striker defines the latched mode of operation.
  • a second angular restriction allows unrestricted rotation of the striker catch between the first limit of rotation and a maximum limit of rotation in which the striker forkbolt and the striker may be disengaged upon application of a force attempting to displace the liftgate to an ajar position.
  • a third range of angular positions of the striker catch occurs upon rotation of the striker forkbolt to the maximum limit of rotation whereupon the striker forkbolt and the striker are completely disengaged permitting the door to be positioned in an open mode of operation.
  • the fourth range of angular positions occurs in which the striker forkbolt is restricted to a second limit of rotation in which the striker forkbolt engages the striker defining a safety mode of operation.
  • the invention includes a pawl which is selectively rotatable about a second axis and may be engaged with cooperating abutment surfaces defined on the striker forkbolt to provide various rotational restrictions thereof.
  • the pawl is maintained in a first position engaging a first radially extending abutment surface to define the latched condition.
  • the pawl is maintained in a second angularly displaced position which prevents the pawl from engaging the striker forkbolt to define an ajar mode of operation in which the striker forkbolt is free to rotate from the latched condition to a maximum limit of rotation.
  • the pawl is maintained in a third condition in which the pawl is compliantly urged into contact with the rotatable striker forkbolt to define an open mode of operation. Finally, the pawl is maintained in a fourth condition engaged with a second cooperating radially extending abutment surface of the striker forkbolt to define a safety mode of operation.
  • the preferred embodiment of the present invention includes a first rotatable member engaged with the pawl drivingly engaged to a second member. The second member may be selectively restricted in rotation by an engagement with a third member.
  • Such a restriction of rotation of the second member thereby restricts rotation of the first member defining a displaced position of the pawl which permits the vehicle door to be operated in an ajar condition in which the door will not enter the safety mode of operation until it has been displaced into the position defined by the open mode of operation.
  • the present invention comprises an apparatus for establishing a mode of operation of a vehicle door 10 as shown in Figure 1, secured to the fixed structure of an automobile 14 having striker assembly 16 engageable with the apparatus of the present invention 18.
  • the apparatus of the present invention is secured to the vehicle door 10 and is utilized to define and establish various modes of operation of vehicle door 10.
  • the apparatus of the present invention constitutes an assembly of components which may be viewed in various perspectives and for purposes of simplified description will be discussed as viewed in two planes.
  • a first plane of operation may be viewed in Figures 2 and 3 including a striker forkbolt 20 rotatable about a first axis 22.
  • striker loop 24 is shown engaged to striker forkbolt 20.
  • a pawl 26 rotatable about a second axis 28 includes a radially extending member 30 shown engaged with a cooperating abutment surface 32, thereby defining a restriction of rotation of striker forkbolt 20.
  • a radially extending member 30 shown engaged with a cooperating abutment surface 32, thereby defining a restriction of rotation of striker forkbolt 20.
  • Figure 3 illustrates the positional inter-relationship of striker forkbolt 20 and pawl 26 to define an ajar mode of operation.
  • the radially extending member 30 is rotatably displaced to a position which provides no restriction of rotation of striker forkbolt 20.
  • Figures 2, 3, 4 and 5 provide views of the first and second planes of the present invention, illustrating the mechanism which establishes the position of pawl 26 including release lever 34 which is rotatably engaged with pawl 26.
  • Release lever 34 is drivingly engaged with actuator lever 36 which is rotatably secured about third axis 38.
  • a release lever holder 40 is rotatably fixed about fourth axis 42 and defines an abutment surface 44 engageable with cooperating surface 46 of actuator lever 36 to define the ajar mode of operation shown in Figure 3.
  • release lever holder 40 includes a cam-follower portion 50 which follows a cam profile 51 defined substantially by radius R1 and R2 defined on striker forkbolt 20.
  • cam-follower 50 Upon rotation of striker forkbolt 20 to an open position cam-follower 50 is displaced laterally by a dimension equal to R2 minus R1 thereby releasing abutment surface 44 from cooperating abutment surface 46 permitting actuator lever 36, release lever 34, and pawl 26 to be compliantly urged by a spring into contact with cooperating abutment surface 32 of radially extending surface 54 of striker forkbolt 20, therein defining an open mode of operation.
  • a final mode of operation is defined by the consequence of incomplete closure of door 10, whereupon striker forkbolt 20 engaged with striker loop 24 is partially rotated about first axis 22 such that radially extending member 30 engages with a cooperating abutment surface 32 defined on striker forkbolt 20.
  • actuator lever 36 can be rotatably displaced from a latched mode of operation to an ajar mode of operation by an actuator establishing a selected position by electromotive force or manually operated cable 60.
  • Fig. 5 shows the configuration at the end of the ajar mode just before reaching the open position.
  • the release lever 34 holds the pawl 26 away from the radially extending abutment surfaces 32, which have just passed beyond the nose of radially extending member 30.
  • Fig. 5 shows an artificial transition stage just after the pawl 26 has cleared the safety mode abutment surface and where further rotation of the forkbolt 20 has in the meantime caused the release lever holder 40 to withdraw from its "hold" position for the ajar mode (at cam distance R 2 ), permitting the pawl 26 to rest its radially extending member 30 on cooperating abutment surface 32 of forkbolt 20.

Landscapes

  • Lock And Its Accessories (AREA)

Claims (6)

  1. Schließmechanismus zum Herbeiführen unterschiedlicher Betriebsarten beim Schließen einer Tür (10), dadurch daß eine Reihe von Positionsbeziehungen in Bezug auf eine feste Struktur vorgesehen sind, die einen an der festen Struktur befestigten Anschlag (24) enthält, der wahlweise mit einem an der Tür (10) befestigten Anschlag-Gabelbolzen (20) in Eingriff gebracht werden kann, wobei der Gabelbolzen um eine erste Achse (22) drehbar ist und wobei der Mechanismus enthält:
    einen Anschlag-Gabelbolzen (20), der wahlweise mit dem Anschlag in Eingriff gebracht werden kann, der an der Tür (10) befestigbar ist und der um eine erste Achse (22) in vorbestimmte Winkelpositionen in Bezug auf den Anschlag (24) gedreht werden kann;
    Mittel zur wahlweisen Beschränkung des Drehwinkels des Anschlag-Gabelbolzens (20), um vier Betriebsarten zu schaffen;
    eine verriegelte Betriebsart, in der der Anschlag-Gabelbolzen (20) in Eingriff mit dem Anschlag (24) ist und an einer Verschiebung gehindert ist;
    eine angelehnte Betriebsart, in der eine freie Drehung des Gabelbolzens aus der verriegelten Stellung möglich ist, nach Drehung des Gabelbolzens durch den Anschlag während eines ungehinderten Öffnens der Tür bis zu einer Obergrenze der Drehung, bei der der Anschlagring freigegeben worden ist;
    eine geöffnete Betriebsart, die der Obergrenze der Drehung des Anschlag-Gabelbolzens (20) entspricht; und
    eine gesicherte Betriebsart, in der während des nachfolgenden Schließens nach dem Passieren einer zweiten Begrenzung der Drehung das erneute Öffnen über die zweite Begrenzung hinaus dann blockiert ist und in der eine begrenzte Verschiebung zwischen der Tür (10) und der festen Struktur möglich ist;
    wobei die Mittel zur wahlweisen Beschränkung des Drehwinkels des Anschlag-Gabelbolzens (20) eine wahlweise um eine zweite Achse (28) drehbare Klinke (26) enthalten, die einen ersten sich radial erstreckenden Abschnitt (30) aufweist, der wahlweise mit ersten und zweiten zusammenwirkenden, sich radial erstreckenden Anlageflächen in Eingriff gebracht werden kann, die am Anschlag-Gabelbolzen (20) gebildet sind, um eine Drehung desselben zu beschränken;
    wobei die Klinke (26) in einem ersten Zustand gehalten ist, in dem sie mit der ersten sich radial erstreckenden Anlagefläche in Eingriff ist, um den Anschlag-Gabelbolzen (20) an einer ersten Begrenzung der Drehung zu halten und so die verriegelte Betriebsart zu definieren;
    und wobei die Klinke (26) in einem zweiten Zustand gehalten wird, in dem die Klinke (26) daran gehindert ist, mit dem Anschlag-Gabelbolzen (20) in Eingriff zu kommen, um die angelehnte Betriebsart zu definieren; die Klinke (26) wird in einem dritten Zustand gehalten, um die geöffnete Betriebsart zu definieren; und die Klinke (26) wird in einem vierten Zustand gehalten, in dem sie mit der zweiten zusammenwirkenden, sich radial erstreckenden Anlagefläche des Anschlag-Gabelbolzens (20) in Eingriff ist, um die gesicherte Betriebsart zu definieren;
    gekennzeichnet durch ein erstes Bauteil (34), das drehbar an der zweiten Achse (28) angebracht und so in Dreheingriff mit der Klinke (26) ist, daß in der angelehnten Betriebsart das erste Bauteil (34) eine Stellung annimmt, in der es vom Anschlag-Gabelbolzen (20) weggedreht ist, um die Klinke (26) im zweiten Zustand zu halten, in dem sie am Eingriff mit dem Anschlag-Gabelbolzen (20) gehindert ist, wogegen während der geöffneten Betriebsart die Klinke (26) nachgebend in Eingriff mit ihm gedrängt wird.
  2. Mechanismus nach Anspruch 1, bei welchem die Mittel zur wahlweisen Begrenzung des Drehwinkels des Anschlag-Gabelbolzens (20) enthalten:
    Mittel zur wahlweisen Begrenzung der Drehung des ersten Bauteils (34), wodurch der zweite Zustand der Klinke (26) definiert wird, in dem die Klinke (26) am Eingriff mit dem Anschlag-Gabelbolzen (20) gehindert ist, um die angelehnte Betriebsart zu definieren.
  3. Mechanismus nach Anspruch 2, bei welchem die Mittel zur wahlweisen Begrenzung der Drehung des ersten Bauteils (34) enthalten:
    ein zweites Bauteil (36), das mit dem ersten Bauteil (34) in Triebschluß ist; und
    Mittel zur wahlweisen Begrenzung der Drehung des zweiten Bauteils (36), wodurch der zweite Zustand der Klinke (26) definiert wird, in dem die Klinke (26) am Eingriff mit dem Anschlag-Gabelbolzen (20) gehindert ist, um die angelehnte Betriebsart zu definieren.
  4. Mechanismus nach Anspruch 2, bei welchem die Mittel zur wahlweisen Beschränkung des Drehwinkels des ersten Bauteils (34) enthalten:
    ein zweites Bauteil (36), das in Triebschluß mit dem ersten Bauteil (34) ist; und
    ein drittes Bauteil (40), das wahlweise mit am zweiten Bauteil (36) gebildeten, zusammenwirkenden Anlageflächen (46) in Eingriff gebracht werden kann und das die Drehung des zweiten Bauteils (36) beschränkt, nachdem es mit diesem in Eingriff gekommen ist, und das dadurch den zweiten Zustand der Klinke (26) definiert, in dem die Klinke (26) am Eingriff mit dem Anschlag-Gabelbolzen (20) gehindert ist, um die angelehnte Betriebsart zu definieren.
  5. Mechanismus nach Anspruch 1, bei welchem die Klinke (26) drehbar mit einem Kraftauslöser (60) verbunden ist, der deren Drehstellung bestimmt, einschließlich einer ersten Drehstellung, die die verriegelte Betriebsart definiert, und einer zweiten Drehstellung, die die angelehnte Betriebsart definiert.
  6. Mechanismus nach Anspruch 4, bei welchem das dritte Bauteil (40) außer Eingriff mit der am zweiten Bauteil (36) gebildeten, zusammenwirkenden Anlagefläche (46) in Reaktion auf eine Kraft ist, die auf es über eine Anlagefläche (51) am Anschlag-Gabelbolzen (20) übertragen wird, um die gesicherte Betriebsart herbeizuführen.
EP94928664A 1993-09-30 1994-09-26 Fallenschloss für abschliessbares karosserieteil Expired - Lifetime EP0721538B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US12951593A 1993-09-30 1993-09-30
PCT/US1994/010841 WO1995009289A1 (en) 1993-09-30 1994-09-26 Liftgate latch
US129515 1998-08-05

Publications (2)

Publication Number Publication Date
EP0721538A1 EP0721538A1 (de) 1996-07-17
EP0721538B1 true EP0721538B1 (de) 2001-05-23

Family

ID=22440359

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94928664A Expired - Lifetime EP0721538B1 (de) 1993-09-30 1994-09-26 Fallenschloss für abschliessbares karosserieteil

Country Status (3)

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EP (1) EP0721538B1 (de)
DE (1) DE69427302T2 (de)
WO (1) WO1995009289A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9915432D0 (en) 1999-07-01 1999-09-01 Meritor Light Vehicle Sys Ltd Latch assembly
GB9911263D0 (en) * 1999-05-15 1999-07-14 Meritor Light Vehicle Sys Ltd Latch
GB0011456D0 (en) 2000-05-13 2000-06-28 Meritor Light Vehicle Sys Ltd Latch assembly and latch arrangement
GB0130858D0 (en) 2001-12-22 2002-02-06 Meritor Light Vehicle Sys Ltd A latch

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3406116A1 (de) * 1984-02-21 1985-08-22 Kiekert GmbH & Co KG, 5628 Heiligenhaus Mit vorrast und hauptrast ausgeruesteter kraftfahrzeugtuerverschluss mit einrichtung fuer eine elektromotorische steuerung
US4763936A (en) * 1986-10-20 1988-08-16 General Motors Corporation Power operated door latch
DE3801581C1 (de) * 1988-01-21 1988-10-13 Bomoro Bocklenberg & Motte Gmbh & Co Kg, 5600 Wuppertal, De
GB9108447D0 (en) * 1991-04-19 1991-06-05 Rockwell Automotive Body Syst Vehicle door latches

Also Published As

Publication number Publication date
DE69427302T2 (de) 2001-12-06
WO1995009289A1 (en) 1995-04-06
EP0721538A1 (de) 1996-07-17
DE69427302D1 (de) 2001-06-28

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