EP0982458A1 - Hilfsvorrichtung zum Öffnen und Schliessen von einem Kofferraumdeckel eines Kraftfahrzeuges - Google Patents

Hilfsvorrichtung zum Öffnen und Schliessen von einem Kofferraumdeckel eines Kraftfahrzeuges Download PDF

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Publication number
EP0982458A1
EP0982458A1 EP99440218A EP99440218A EP0982458A1 EP 0982458 A1 EP0982458 A1 EP 0982458A1 EP 99440218 A EP99440218 A EP 99440218A EP 99440218 A EP99440218 A EP 99440218A EP 0982458 A1 EP0982458 A1 EP 0982458A1
Authority
EP
European Patent Office
Prior art keywords
door
closing
opening
assistance device
coupling joint
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.)
Withdrawn
Application number
EP99440218A
Other languages
English (en)
French (fr)
Inventor
Dominique Benoit
Stéphane Kippelen
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.)
Akwel SA
Original Assignee
MGI Coutier SA
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 MGI Coutier SA filed Critical MGI Coutier SA
Publication of EP0982458A1 publication Critical patent/EP0982458A1/de
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F1/00—Closers or openers for wings, not otherwise provided for in this subclass
    • E05F1/08—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings
    • E05F1/10—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance
    • E05F1/1091—Closers or openers for wings, not otherwise provided for in this subclass spring-actuated, e.g. for horizontally sliding wings for swinging wings, e.g. counterbalance with a gas spring
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/60—Power-operated mechanisms for wings using electrical actuators
    • E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
    • E05F15/611—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings
    • E05F15/616—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings operated by push-pull mechanisms
    • E05F15/622—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for swinging wings operated by push-pull mechanisms using screw-and-nut mechanisms
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
    • E05Y2900/53—Application of doors, windows, wings or fittings thereof for vehicles characterised by the type of wing
    • E05Y2900/546—Tailgates

Definitions

  • the present invention relates to a device for assisting with opening and closing a door of a vehicle trunk, in particular a tailgate, said door being fitted with hinges associated with vehicle body elements defining a pivot axis of the door and being arranged to pivot between a low position, said closed, and a high position, called open, the assistance device comprising at at least one thrust member comprising a first and a second end, the first end of said thrust member comprising a first articulation of coupling cooperating with said vehicle body elements and the second end of said thrust member comprising a second coupling articulation cooperating with said door.
  • a device assistance comprises one or two thrust members, often gas or gas cylinders spring, each arranged at a side edge of the door.
  • Each cylinder is articulated at its two ends, by two ball joints, one of which is fixed to the bodywork elements of the vehicle and the other is attached to the door.
  • Each pushing member is therefore mounted between two fixed points, with respect to the bodywork elements respectively and at the door.
  • the opening and closing of the door are defined by the dimensions of the door and in the weight of the door, the top and bottom positions of the door, the characteristics of the cylinders and in particular the force they generate according to their stroke, and finally the fixed location chosen for each coupling joint on the door and body parts.
  • the main function of the assistance device is to keep the door in position high, called open, and must therefore generate a couple of forces on the door greater than that generated by the door's own weight in this position.
  • the device assistance is usually designed so that there is an equilibrium position of the door, between its high position and its low position, for which the couples of forces antagonists balance each other. Finally, in a door position between this equilibrium position and the bottom position, called closed, the weight of the door generates a torque greater than that of the thrust members facilitating its closing.
  • the grip handle mounted on the door
  • the grip handle is very high and makes it difficult for the user, especially small, to grasp it easily.
  • the pairs of opposing forces due to the weight of the door and the cylinders, often have values far apart when the door is close to the positions high and low, causing it to stop suddenly at the end of the movement. What whatever the door opening and closing strategies adopted by the car manufacturers, with current assistive devices, the user is always required to make an effort, sometimes very significant, at least for the closure of the door.
  • the technical publication "Deck Lid Counterbalance” (Research Disclosure n ° 310 of 01/01/90, page 135) describes a balancing device specially designed to provide a solution to the problem of variations in gas cylinder forces during fluctuations of temperature.
  • This device includes a mechanism for modifying the distance between the pivot axis of the boot door and the fulcrum of the cylinder to gas on the vehicle body. This fulcrum slides in a curved rail when the restraint stress exerted by a return device on this fulcrum is reached.
  • this device does not include a motorization, the displacement of the fulcrum taking place automatically depending on the stresses exerted by the trunk door, this movement being random, not controllable. It is therefore not possible to adjust and control the position of this support point.
  • this device does not allow the automatic closing of the trunk door, it is necessary the application of an effort on the part of the operator.
  • the object of the present invention is to overcome these drawbacks by providing a device assistance in opening and closing a door of a simple vehicle trunk, economical, space-saving, practical, controllable, which allows to minimize the effort provided by the user to open or close the trunk door, or even to obtain a automatic opening and closing of the door.
  • an assistance device as described in the preamble, characterized in that at least one of the coupling joints is mobile and has a mechanism with motor, so that the lever arm of the pushing force generated by said thrust member, which is defined relative to the pivot axis of the door, is modified in a predetermined manner, so as to facilitate opening and closing of said door.
  • said movable coupling joint is arranged to move between a low position distant from the pivot axis of the door and a high position close to the pivot axis of the door corresponding, respectively, to a maximum lever arm and a lever arm minimum of said thrust force, so that when said articulation of movable coupling is in the low position, the thrust member is arranged to generate a couple of forces on the door whose value is greater than that of the couple of forces generated by its own weight whatever the position of the door, facilitating its opening and, when said movable coupling articulation is in the high position, the thrust member is arranged to generate a couple of forces on the door, the value is less than that of the couple of forces generated by its own weight whatever the position of the door, making it easier to close.
  • Said movable coupling joint is preferably arranged to move from straight line.
  • said mechanism for controlling the displacement comprises a free nut mounted on a worm screw coupled to said motor, said free nut being linked to said coupling articulation and being arranged to move rectilinearly along the longitudinal axis of the worm screw when it turns on itself.
  • control mechanism comprises a servo system arranged to transmit control signals to said audit engine.
  • the servo system can include detection means and a block electronics arranged to generate said control signals so that the coupling joint is moved from the first to the high position at the end of the opening of the door, to facilitate its closing, and is moved from the second to the low position at the end of the door closing, to facilitate its opening.
  • the electric motor control can be controlled depending on the speed opening / closing of the door so as not to be too "brutal".
  • the control system may include detection means (for example of speed or position) and an electronic unit arranged to generate said signals control so that the coupling joint is moved at least partially predetermined from the first to the high position during the opening of the door, and is moved at least partially in a determined manner from the second to the low position during door closing.
  • detection means for example of speed or position
  • electronic unit arranged to generate said signals control so that the coupling joint is moved at least partially predetermined from the first to the high position during the opening of the door, and is moved at least partially in a determined manner from the second to the low position during door closing.
  • the coupling joint can be moved at constant or variable speed for opening and closing the door.
  • the speed of movement of the coupling joint is advantageously increased during door opening, when the door is in a position close to the high position, and during the closing of the door, when the door is in a position close to the low position.
  • the servo system can advantageously include an element actuation chosen from at least one push button placed outside the vehicle and an infrared remote control, operated by the user and arranged for control the automatic opening and closing of said door.
  • FIG. 1 partially represents the assistance device 10 for opening and closing of a door 11 of a trunk 12 of a vehicle 13, such as a tailgate, object of the present invention.
  • a vehicle 13 such as a tailgate
  • the unibody type motor vehicle, commonly called “minivan”, which is shown in the figure is by way of example only.
  • the assistance device 10 of the present invention is very well suited to other types of vehicle, such as sedan, limousine or station wagon for example.
  • the door 11 is fitted with hinges 14 associated with bodywork elements 15 of the vehicle 13. These hinges 14 define a pivot axis 16 of the door 11. The latter is arranged to pivot about its pivot axis 16 between a low position, called closed, and a high position, called open.
  • the assistance device 10 comprises two pushing members 17, for example, such as gas or spring cylinders, arranged to stress the door 11 towards its high position.
  • Each cylinder is disposed at a side edge of the door 11 of so as to balance it transversely.
  • a single cylinder may suffice. The following description will relate to a single cylinder with reference to the figures. If the assistance device has two cylinders then they can operate simultaneously.
  • the jack 17 has a first end 17 'and a second end 17 ".
  • first end 17 ' has a first coupling articulation 18, such as a pivot axis or a ball joint, cooperating with the bodywork elements 15 of the vehicle 13.
  • the second end 17 " has a second coupling articulation 19, such as a pivot axis or a ball joint, cooperating with the door 11.
  • the first coupling articulation 18 of the jack 17 is movable. It is arranged for move, for example, rectilinearly, and simultaneously for both cylinders 17, between a low position P1, distant from the pivot axis 16 of the door 11 and a high position P2, close to the pivot axis 16 of the door 11.
  • the Figure 1 shows different angular positions of opening the door 11 with the first coupling joint 18 in the low position P1.
  • Figure 2 shows different angular positions for closing the door 11 with the first coupling joint 18 in the high position P2.
  • the displacement of these two coupling joints 18 allows to modify the lever arm of the pushing force generated by the two cylinders 17, which is defined relative to the pivot axis 16 of the door 11.
  • the low position P1 corresponds to a maximum lever arm of the force of thrust of the two cylinders 17.
  • the high position P2 corresponds to an arm of minimum leverage of this pushing force.
  • the first movable coupling articulation 18 of the jack 17 comprises a mechanism for control 20 of its movement, shown in detail in Figure 3. It includes a support 21, for example metallic, fixed to the bodywork elements 15 of the vehicle 13, by means of screws or rivets engaged in three cylindrical holes 22 formed in the lower wall of the support 21 for example.
  • the control mechanism 20 comprises a free nut 23 mounted on an endless screw 24 pivotally mounted on the support 21.
  • the longitudinal axis of the worm 24 coincides with the axis passing through the position low P1 and the high position P2 illustrated in FIGS. 1 and 2.
  • the free nut 23 is linked to the first coupling articulation 18 of the jack 17 (not shown in the figure).
  • This nut 23 is arranged to move rectilinearly along the longitudinal axis of the worm 24 when the latter turns on itself.
  • the position of the free nut 23 on the worm 24 shown in Figure 2 corresponds to the low position P1 of the coupling joint 18 of FIG. 1.
  • the coupling joint 18 is in the high position P2.
  • the screw end 24 is coupled to a motor 25, such as an electric motor powered by the battery accumulators of the vehicle 13 for example, which causes it to rotate around its axis.
  • control mechanism 20 of the coupling joint 18 can be done differently, the main thing being to modify the position of this joint.
  • the movement of this articulation 18 is not necessarily rectilinear. It can be curved, follow a left trajectory or a broken right.
  • the control mechanism 20 also includes a servo system (not shown) arranged to transmit control signals to the motor 25.
  • the servo system includes detection means and an electronic unit arranged to generate the control signals transmitted to the motor 25 so determined according to the strategy chosen by the automaker for the opening and closing door 11. Several possible operating modes of the system control will be described later.
  • the opening and closing of the door are defined by several known criteria, to know: the dimensions of door 11 and in particular the weight of the door and its distribution, the high and low positions of the door 11, the characteristics of the jacks 17 and in particular of the force which they generate according to their course, and finally of the location of each coupling joint 18, 19 on the bodywork elements 15 and door 11. Finally, the opening and closing of door 11 also depend external stresses, such as the effort mainly provided by the user, and others more secondary like the wind, the inclination of the vehicle 13 if it is in a steep slope for example.
  • the main function of the assistance device 10 is to maintain of the door 11 in the high position, called the open position, and must therefore generate a couple of forces on the door higher than that generated by the door's own weight in this position.
  • the nut free 23 and therefore the first coupling joint 18 are in the low position P1 illustrated by FIG. 1.
  • This coupling articulation 18 is distant from the axis of pivot 16 of door 11, the lever arm of the thrust force of the cylinders 17 is therefore maximum. This is to reduce the effort exerted by the user when opening door 11. To open door 11, the user must pull lightly the door up.
  • the jacks 17 are chosen, for example, so that there is an equilibrium position of the door 11, between its high position and its low position, for which the pairs of antagonistic forces balance each other. So beyond this position of equilibrium, the opening from door 11 is automatically carried out to the high position. At the end of the opening, the high position of the door 11 is detected by the detection means, for example limit switches. The servo system is then arranged to generate control signals to the motor 25 so that the coupling joint 18 linked to the nut 23 is moved from the low position P1 to the high position P2. Thus, the coupling joint 18 is brought closer to the axis of pivot 16 of door 11, the lever arm of the thrust force of the cylinders 17 is therefore minimum. This is to reduce the effort exerted by the user during the door 11 is closed.
  • the operator must pull the door slightly downwards to to start its closing, because it must oppose the assistance device which maintains the door in its high position. From a certain closing angle, corresponding to the equilibrium position, the weight of door 11 generates a force torque greater than that of the cylinders 17 and the door closes automatically. At the end of the closing, the low position of the door 11 is detected by the detection means, for example limit switches. The servo system is then arranged to generate control signals to the motor 25 so that the coupling joint 18 linked to the nut 23 is moved from the high position P2 to the low position P1. This mode of operation is iterative.
  • the servo system comprising the detection means and the electronic unit is arranged to generate the control signals to the motor 25 so that the coupling joint is moved at least partially predetermined from the first P1 to the high position P2 during the opening of door 11.
  • the detection means such as a position sensor
  • the system control system is arranged to generate said control signals to the motor 25 to move the coupling joint 18 towards the high position P2. This allows to reduce the lever arm of the thrust force of the cylinders 17 during the opening of the door and thus slow down the speed of movement of door 11 when approaching the high position.
  • the servo system is arranged to generate the signals of control so that the coupling joint 18 is moved at least partially predetermined from the high position P2 to the low position P1 during the closing of the door, for example beyond the equilibrium position. That increases the lever arm of the thrust force of the cylinders 17 during the closing of door 11 and thus slowing down the speed of movement of door 11 to approaching the low position. The opening and closing of the door 11 is then done softer than before, but slower.
  • the servo system can also be arranged so that the movement of the coupling joint 18 is produced at constant or variable speed during opening and closing the door.
  • the movement speed of the coupling joint 18 can be increased during the opening of the door, when it is in a position close to the high position and during the closing of the door, when it is in a position close to the low position.
  • the means of detection and the electronic unit suitable for such operation are within the reach of skilled in the art and are not described here
  • the assist device 10 of the present invention can be easily arranged to so that the opening and closing of the door 11 is done automatically without no manual intervention.
  • the cylinders 17 are chosen and arranged to generate a torque of forces on door 11 whose value is greater than that of the torque of forces generated by its own weight regardless of the position of the door 11 when the coupling joint 18 is in the low position P1.
  • the cylinders 17 are arranged to generate a couple of forces on the door 11 whose value is lower than that of the couple of forces generated by its own weight whatever the position of the door 11 when the coupling joint 18 is in the high position P2.
  • the assistance device 10 of the present invention comprises an element actuation, such as a push button placed outside the vehicle or a infrared remote control for example, which can be operated by the user.
  • the device 10 is arranged so that each time the user actuates the actuating element, the servo system is arranged to generate the control signals to the motor so that the coupling joints 18 are moved either to the low position P1 or to the high position P2 depending on their positions previous.
  • the door 11 can open and close automatically without user intervention.
  • the assistance device 10 for opening and closing a door 11 of a trunk 12 of vehicle 13 of the present invention is simple, economical, compact and practical. he allows to minimize the effort provided by the user to open or close the door 11 of the trunk 12, or even to obtain an automatic opening and closing of this door.
  • the assistance device is particularly suitable for motor vehicles of the unibody type, commonly called "minivans", for which the tailgate of the trunk has very important dimensions and weight. Especially since when the door is in the high position, the grip handle, mounted on the door, is very high and makes it difficult for the user, especially small, to grasp it easily.
  • control mechanism may include an actuator in place of the motor assembly, worm and nut.

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  • Power-Operated Mechanisms For Wings (AREA)
EP99440218A 1998-08-21 1999-07-29 Hilfsvorrichtung zum Öffnen und Schliessen von einem Kofferraumdeckel eines Kraftfahrzeuges Withdrawn EP0982458A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9810664A FR2782536B1 (fr) 1998-08-21 1998-08-21 Dispositif d'assistance a l'ouverture et a la fermeture d'une porte d'un coffre de vehicule
FR9810664 1998-08-21

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Publication Number Publication Date
EP0982458A1 true EP0982458A1 (de) 2000-03-01

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EP99440218A Withdrawn EP0982458A1 (de) 1998-08-21 1999-07-29 Hilfsvorrichtung zum Öffnen und Schliessen von einem Kofferraumdeckel eines Kraftfahrzeuges

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EP (1) EP0982458A1 (de)
FR (1) FR2782536B1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002027133A1 (en) * 2000-09-29 2002-04-04 Intier Automotive Closures Inc. Liftgate force control
EP1314909A1 (de) * 2001-11-22 2003-05-28 Ford Global Technologies, Inc., A subsidiary of Ford Motor Company Federeinrichtung für Klappensystem
US6719356B2 (en) 2001-04-26 2004-04-13 Litens Automotive Powered opening mechanism and control system
EP1154111A3 (de) * 2000-05-12 2005-06-15 DaimlerChrysler AG Betätigungsanordnung zum Öffnen und Schliessen von schwenkbaren Fahrzeugflügeln
WO2006012848A1 (de) * 2004-07-26 2006-02-09 Brose Fahrzeugteile Gmbh & Co. Kg, Coburg VORRICHTUNG ZUM ÖFFNEN UND SCHLIEßEN EINER HECKKLAPPE
US7070226B2 (en) 2001-04-26 2006-07-04 Litens Automotive Powered opening mechanism and control system
WO2011095432A1 (de) * 2010-02-02 2011-08-11 Scherdel Innotec Forschungs- Und Entwicklungs-Gmbh Vorrichtung zum schliessen einer schwenkbaren klappe sowie klappe und kraftfahrzeug mit einer solchen vorrichtung
FR3102100A1 (fr) * 2019-10-16 2021-04-23 Psa Automobiles Sa Dispositif d’entrainement motorisé d’un ouvrant de véhicule

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19758130A1 (de) * 1997-03-15 1998-09-17 Suspa Compart Ag Hubaggregat, insbesondere für einen gegenüber einem festen Teil schwenkbaren Deckel

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19758130A1 (de) * 1997-03-15 1998-09-17 Suspa Compart Ag Hubaggregat, insbesondere für einen gegenüber einem festen Teil schwenkbaren Deckel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"DECK LID COUNTERBALANCE", RESEARCH DISCLOSURE, no. 310, 1 February 1990 (1990-02-01), pages 135, XP000087018 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1154111A3 (de) * 2000-05-12 2005-06-15 DaimlerChrysler AG Betätigungsanordnung zum Öffnen und Schliessen von schwenkbaren Fahrzeugflügeln
WO2002027133A1 (en) * 2000-09-29 2002-04-04 Intier Automotive Closures Inc. Liftgate force control
US6719356B2 (en) 2001-04-26 2004-04-13 Litens Automotive Powered opening mechanism and control system
US7070226B2 (en) 2001-04-26 2006-07-04 Litens Automotive Powered opening mechanism and control system
EP1314909A1 (de) * 2001-11-22 2003-05-28 Ford Global Technologies, Inc., A subsidiary of Ford Motor Company Federeinrichtung für Klappensystem
WO2006012848A1 (de) * 2004-07-26 2006-02-09 Brose Fahrzeugteile Gmbh & Co. Kg, Coburg VORRICHTUNG ZUM ÖFFNEN UND SCHLIEßEN EINER HECKKLAPPE
WO2011095432A1 (de) * 2010-02-02 2011-08-11 Scherdel Innotec Forschungs- Und Entwicklungs-Gmbh Vorrichtung zum schliessen einer schwenkbaren klappe sowie klappe und kraftfahrzeug mit einer solchen vorrichtung
FR3102100A1 (fr) * 2019-10-16 2021-04-23 Psa Automobiles Sa Dispositif d’entrainement motorisé d’un ouvrant de véhicule

Also Published As

Publication number Publication date
FR2782536A1 (fr) 2000-02-25
FR2782536B1 (fr) 2000-10-13

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