EP1621712A1 - Anti-pinch system - Google Patents

Anti-pinch system Download PDF

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Publication number
EP1621712A1
EP1621712A1 EP05291491A EP05291491A EP1621712A1 EP 1621712 A1 EP1621712 A1 EP 1621712A1 EP 05291491 A EP05291491 A EP 05291491A EP 05291491 A EP05291491 A EP 05291491A EP 1621712 A1 EP1621712 A1 EP 1621712A1
Authority
EP
European Patent Office
Prior art keywords
clutch
pinch
opening
motor
drive
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Withdrawn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
EP05291491A
Other languages
German (de)
French (fr)
Inventor
Chris Rhodes
Paul Bizard
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.)
Inteva Products France SAS
Original Assignee
ArvinMeritor Light Vehicle Systems France 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 ArvinMeritor Light Vehicle Systems France SA filed Critical ArvinMeritor Light Vehicle Systems France SA
Publication of EP1621712A1 publication Critical patent/EP1621712A1/en
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • E05F15/665—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings
    • E05F15/689—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings specially adapted for vehicle windows
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
    • E05Y2201/21—Brakes
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
    • E05Y2201/214—Disengaging means
    • E05Y2201/216—Clutches
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
    • E05Y2201/23—Actuation thereof
    • E05Y2201/246—Actuation thereof by auxiliary motors, magnets, springs or weights
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
    • E05Y2201/252—Type of friction
    • E05Y2201/26—Mechanical friction
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/20—Brakes; Disengaging means; Holders; Stops; Valves; Accessories therefor
    • E05Y2201/262—Type of motion, e.g. braking
    • E05Y2201/266—Type of motion, e.g. braking rotary
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/40—Motors; Magnets; Springs; Weights; Accessories therefor
    • E05Y2201/46—Magnets
    • E05Y2201/462—Electromagnets
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2201/00—Constructional elements; Accessories therefor
    • E05Y2201/40—Motors; Magnets; Springs; Weights; Accessories therefor
    • E05Y2201/47—Springs
    • E05Y2201/49—Wrap springs
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2400/00—Electronic control; Electrical power; Power supply; Power or signal transmission; User interfaces
    • E05Y2400/10—Electronic control
    • E05Y2400/52—Safety arrangements associated with the wing motor
    • E05Y2400/53—Wing impact prevention or reduction
    • E05Y2400/54—Obstruction or resistance detection
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/50—Application of doors, windows, wings or fittings thereof for vehicles
    • E05Y2900/53—Type of wing
    • E05Y2900/55—Windows

Definitions

  • the present invention relates to an anti-pinch system.
  • the opening drive mechanisms may be equipped with anti-pinch systems; these systems provide for example to reverse the direction of rotation of the drive motor when a pinch is detected.
  • Document DE-A-26 15 511 discloses a drive mechanism, in particular for a window regulator, comprising a clutch arranged between a reduction gear of a geared motor and a pinion for driving the window by an arm and sector mechanism.
  • the clutch partially disengages the drive mechanism when an obstacle opposes the rise of the window creating a resisting force that opposes the torque of the geared motor.
  • the clutch comprises a spring sized to engage / disengage the mechanism from a certain threshold value of resistant torque.
  • This device is only a torque limiter; the mechanism holding the pinch at the threshold value defined above. There is therefore a need for an anti-pinch system which is more efficient and which makes it possible to comply with the standards in force.
  • the mechanism further comprises an electric motor driving the input and a gearbox driven by the output, the clutch being between the motor and the gearbox.
  • the clutch is of the electromagnetic type.
  • the mechanism further comprises a brake acting either on the input or on the output when the clutch is in the disengaged state.
  • the drive mechanism is a window lifter, a sunroof mechanism, a swinging or sliding door drive mechanism, a tailgate or luggage compartment flap mechanism.
  • the mechanism comprises a sash drive motor, the method further comprising the steps of reversing the rotation of the motor and then re-clutching the drive mechanism.
  • the method is implemented by the mechanism described above.
  • FIGS. 1 and 2 show a schematic representation of the invention.
  • the invention relates to an anti-pinch system of a vehicle door.
  • the system includes a clutch capable of disconnecting the opening of a drive of the opening following the detection of a pinch by the detection means.
  • the detection means with or without contact, are those known to those skilled in the art and are not the subject of this invention.
  • a disengagement of the drive mechanism of the opening avoids an increase in the clamping force time, for example, to reverse the movement of the mechanism to release the obstacle.
  • FIG. 1 shows a schematic representation of a drive mechanism 10.
  • the invention will be described in a mechanism such as a window lifter.
  • the window regulator is given by way of example and the invention could be applied to other types of opening drive mechanisms such as that of a sunroof, a sliding or swinging door, a tailgate or luggage compartment flap.
  • Figure 1 shows a transmission 12, corresponding to a geared motor.
  • the transmission 12 comprises an inlet 16 and an outlet 18.
  • the mechanism further comprises an electric motor 14 driving the inlet 16.
  • the inlet 16 is connected to the rotor of the motor 14; in Figure 1, the input and the rotor are merged.
  • the outlet 18 may be a reducer comprising a wheel 19 and a worm 24; in the case of a window regulator, the gearbox 18 is connected to a cable winding drum or to a pinion causing a toothed sector, for a power arm mechanism.
  • the inlet 16 drives the outlet 18 via the clutch 22; the clutch 22 is preferably between the motor 14 and the worm 24, on the rotor according to Figure 1.
  • This arrangement has the advantage of requiring a clutch less cumbersome because the torque on the rotor is less than the torque deployed in downstream of the gearbox (for example between the gearbox and the output gear or between the gearbox and the winding drum, where the clutch must be dimensioned more generously to take into account the reduction ratio).
  • the clutch is for example dimensioned the size of the diameter of the armature.
  • the clutch 22 is for example composed of two plates 26, 28, kept in contact when the clutch is in the engaged state, transmitting the torque by friction.
  • the plates are for example on the rotor 16, between the motor 14 and the worm 24.
  • the plate 26 is integral with the portion of the rotor connected to the input 16 of the transmission , and that the plate 28 is movable in translation relative to the other part of the rotor connected to the outlet 18.
  • the plate 28 engages with the plate 26, thus allowing the entire mechanism to be trained; in the disengaged state, the plate 28 moves away from the plate 26 along the rotor, the output 18 of the transmission then no longer being engaged with the inlet 16.
  • the anti-pinch system also comprises detection means a pinch, but which are not shown in Figure 1.
  • the clutch 22 and the detection means form the anti-pinch system of the drive mechanism.
  • the detection means detect a pinch
  • the clutch has moved from an engaged state to a disengaged state; thus if an object such as a finger is pinched between the window and the window frame, the drive mechanism is disengaged which prevents it from continuing to drive the opening in the direction of closing.
  • the clutch makes it possible to separate the drive motor from the rest of the driving kinematic chain of the sash. It can be provided that the drive mechanism is then inverted to release the pinched object; the clutch 22 is provided to reengage the drive mechanism and allow the driving of the window in the direction of descent.
  • the clutch 22 is preferably re-engaged only after reversing the direction of rotation of the engine.
  • the clutch 22 is electromagnetic. This makes it possible to disengage the drive mechanism quickly and to minimize pinching.
  • the disengagement of the drive mechanism by the clutch 22 can act, for example, in less than 5 ms which, in a typical existing system would reduce the clamping force by 30 to 40 N, knowing that the limit of after the FMVSS standard mentioned above is 100N max.
  • the clutch offers us the possibility of gain about 5ms extra at low cost by replacing the control relay with a power transistor. This would require four power transistors to obtain the equivalent gain over the switching time of the motor, which is significantly less economical.
  • the clutch is either engaged or disengaged in the absence of power.
  • the clutch 22 may comprise a coil around the portion of the rotor connected to the outlet 18, and which allows the displacement and disengagement of the plate 28.
  • the clutch in the disengaged state can be used as a brake. This may allow, depending on the design choice, to accelerate the stopping of the rotor when the pinch is detected, in particular to counter the inertia of the motor, and thus accelerate the inversion of the motor to release the object stuck, either to act on the portion of the transmission connected to the outlet 18 and thus to the opening, which can advantageously replace other means to create the irreversibility of the movement of the opening and counter the risks of intrusion into the vehicle.
  • the brake consists for example of a member 30, immobile, on which the plate 28 is pressed when the clutch is open Alternatively, in the opposite configuration shown in Figure 2, the plate 28 is integral with the output 18.
  • the invention also relates to an anti-pinch method.
  • the method can be implemented in a vehicle opening mechanism; for example it may be a window regulator described above, a sunroof drive mechanism or sliding door or swing or liftgate or luggage compartment flap.
  • the method includes a first step of detecting a nip. The detection can be done by measuring the variation of the supply current or the speed of the motor or other such as non-contact detection. The method then comprises the disengagement control of the drive mechanism.
  • the clutch control is triggered by pinch detection; the method makes it possible to quickly separate the drive motor from the rest of the driving kinematic chain of the sash.
  • the method may then comprise additional steps of reversing the direction of rotation of the motor and re-clutch of the drive mechanism once the direction of rotation of the motor reversed.

Landscapes

  • Power-Operated Mechanisms For Wings (AREA)
  • Mechanical Operated Clutches (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

The system has a clutch (22) adapted to disconnect an opening from an opening driving mechanism when a pinch is detected. The clutch is disposed between an electric motor (14) and a worm (24). The clutch has plates (26, 28) that are maintained in contact when the clutch is in an engaged state. The plates (26, 28) are integrated with a part of a rotor connected to an inlet (16) and an outlet (18) of a transmission (12), respectively. Independent claims are also included for the following: (A) a motor vehicle opening driving mechanism comprises an anti-pinch system (B) an anti-pinch method.

Description

La présente invention concerne un système anti-pincement.The present invention relates to an anti-pinch system.

Les mécanismes d'entraînement d'ouvrant, notamment pour véhicule, peuvent être équipés de systèmes anti-pincement ; ces systèmes prévoient par exemple d'inverser le sens de rotation du moteur d'entraînement lorsque un pincement est détecté.The opening drive mechanisms, especially for vehicles, may be equipped with anti-pinch systems; these systems provide for example to reverse the direction of rotation of the drive motor when a pinch is detected.

L'inconvénient de ces systèmes est que l'inertie du moteur d'entraînement empêche le renversement instantané de la vitre en cas de pincement. Ceci peut conduire à une augmentation du pincement au-delà des limites prescrites, par exemple par la norme FMVSS118, le temps d'inverser le sens de rotation du moteur, ce qui ne permet pas d'homologuer les mécanismes d'entraînement.The disadvantage of these systems is that the inertia of the drive motor prevents the instantaneous reversal of the window in the event of pinching. This may lead to an increase in the nip beyond the prescribed limits, for example by FMVSS118, the time to reverse the direction of rotation of the motor, which does not allow to register the drive mechanisms.

Le document DE-A-26 15 511 décrit un mécanisme d'entraînement, notamment pour lève-vitre, comprenant un embrayage disposé entre un réducteur d'un motoréducteur et un pignon d'entraînement de la vitre par un mécanisme à bras et secteur. L'embrayage débraie partiellement le mécanisme d'entraînement lorsqu'un obstacle s'oppose à la montée de la vitre créant un effort résistant qui s'oppose au couple du motoréducteur. L'embrayage comporte un ressort dimensionné pour embrayer / débrayer le mécanisme à partir d'une certaine valeur seuil de couple résistant. Ce dispositif n'est qu'un limiteur de couple ; le mécanisme maintenant le pincement à la valeur du seuil défini ci-dessus. Il y a donc un besoin pour un système anti-pincement qui soit plus efficace, et qui permette de respecter les normes en vigueur.Document DE-A-26 15 511 discloses a drive mechanism, in particular for a window regulator, comprising a clutch arranged between a reduction gear of a geared motor and a pinion for driving the window by an arm and sector mechanism. The clutch partially disengages the drive mechanism when an obstacle opposes the rise of the window creating a resisting force that opposes the torque of the geared motor. The clutch comprises a spring sized to engage / disengage the mechanism from a certain threshold value of resistant torque. This device is only a torque limiter; the mechanism holding the pinch at the threshold value defined above. There is therefore a need for an anti-pinch system which is more efficient and which makes it possible to comply with the standards in force.

Pour cela l'invention propose un système anti-pincement d'un ouvrant de véhicule comprenant :

  • des moyens de détection d'un pincement,
  • un embrayage apte à déconnecter l'ouvrant d'un entraînement de l'ouvrant à la suite de la détection d'un pincement par les moyens de détection.
For this purpose the invention proposes an anti-pinch system of a vehicle opening comprising:
  • means for detecting a nip,
  • a clutch capable of disconnecting the opening of a drive of the opening as a result of the detection of a pinch by the detection means.

L'invention se rapporte aussi à un mécanisme d'entraînement d'un ouvrant de véhicule comprenant :

  • le système anti-pincement tel que décrit précédemment ;
  • une transmission avec une entrée et une sortie reliée à l'ouvrant, l'entrée et la sortie étant solidarisées par l'embrayage.
The invention also relates to a drive mechanism of a vehicle opening comprising:
  • the anti-pinch system as described above;
  • a transmission with an input and an output connected to the opening, the inlet and the outlet being secured by the clutch.

Selon une variante, le mécanisme comporte en outre un moteur électrique d'entraînement de l'entrée et un réducteur entraîné par la sortie, l'embrayage étant entre le moteur et le réducteur.According to one variant, the mechanism further comprises an electric motor driving the input and a gearbox driven by the output, the clutch being between the motor and the gearbox.

Selon une variante, l'embrayage est du type électromagnétique.According to one variant, the clutch is of the electromagnetic type.

Selon une variante, le mécanisme comprend en outre un frein agissant soit sur l'entrée soit sur la sortie lorsque l'embrayage est dans l'état débrayé.According to a variant, the mechanism further comprises a brake acting either on the input or on the output when the clutch is in the disengaged state.

Selon une variante, le mécanisme d'entraînement est un lève-vitre, un mécanisme de toit ouvrant, un mécanisme d'entraînement de porte battante ou coulissante, un mécanisme de hayon ou de volet de coffre à bagages.Alternatively, the drive mechanism is a window lifter, a sunroof mechanism, a swinging or sliding door drive mechanism, a tailgate or luggage compartment flap mechanism.

L'invention se rapporte aussi à un procédé anti-pincement dans un mécanisme d'entraînement d'ouvrant de véhicule comprenant les étapes de :

  • détection d'un pincement, puis
  • commande de débrayage du mécanisme d'entraînement.
The invention also relates to an anti-pinch method in a vehicle opening mechanism comprising the steps of:
  • detection of a pinch and then
  • disengagement control of the drive mechanism.

Selon une variante, le mécanisme comprend un moteur d'entraînement de l'ouvrant, le procédé comprenant en outre les étapes d'inversion de rotation du moteur puis de re-embrayage du mécanisme d'entraînement.According to a variant, the mechanism comprises a sash drive motor, the method further comprising the steps of reversing the rotation of the motor and then re-clutching the drive mechanism.

Selon une variante, le procédé est mis en oeuvre par le mécanisme décrit précédemment.According to one variant, the method is implemented by the mechanism described above.

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui suit des modes de réalisation de l'invention, donnés à titre d'exemple uniquement et en références aux figures 1 et 2 qui montrent une représentation schématique d'un mécanisme d'entraînement.Other features and advantages of the invention will appear on reading the following detailed description of the embodiments of the invention, given by way of example only and with reference to FIGS. 1 and 2 which show a schematic representation of the invention. a drive mechanism.

L'invention se rapporte à un système anti-pincement d'un ouvrant de véhicule. Le système comprend notamment un embrayage apte à déconnecter l'ouvrant d'un entraînement de l'ouvrant à la suite de la détection d'un pincement par les moyens de détection. Les moyens de détection, avec ou sans contact, sont ceux connus de l'homme du métier et ne font pas l'objet de cette invention. Ainsi, un débrayage du mécanisme d'entraînement de l'ouvrant permet d'éviter une augmentation de l'effort de pincement le temps, par exemple, d'inverser le mouvement du mécanisme pour libérer l'obstacle.The invention relates to an anti-pinch system of a vehicle door. The system includes a clutch capable of disconnecting the opening of a drive of the opening following the detection of a pinch by the detection means. The detection means, with or without contact, are those known to those skilled in the art and are not the subject of this invention. Thus, a disengagement of the drive mechanism of the opening avoids an increase in the clamping force time, for example, to reverse the movement of the mechanism to release the obstacle.

La figure 1 montre une représentation schématique d'un mécanisme d'entraînement 10. Dans ce qui va suivre, on décrira l'invention dans un mécanisme tel qu'un lève-vitre. Bien entendu, le lève-vitre est donné à titre d'exemple et l'invention pourrait s'appliquer à d'autres types de mécanismes d'entraînement d'ouvrants tel que celui d'un toit ouvrant, une porte coulissante ou battante, un hayon ou volet de coffre à bagage.Figure 1 shows a schematic representation of a drive mechanism 10. In what follows, the invention will be described in a mechanism such as a window lifter. Of course, the window regulator is given by way of example and the invention could be applied to other types of opening drive mechanisms such as that of a sunroof, a sliding or swinging door, a tailgate or luggage compartment flap.

La figure 1 montre une transmission 12, correspondant à un motoréducteur. La transmission 12 comprend une entrée 16 et une sortie 18. Le mécanisme comporte en outre un moteur électrique 14 entraînant l'entrée 16. L'entrée 16 est reliée au rotor du moteur 14 ; sur la figure 1, l'entrée et le rotor sont confondus. La sortie 18 peut être un réducteur comprenant une roue 19 et une vis sans fin 24 ; dans le cas d'un lève-vitre, le réducteur 18 est relié à un tambour d'enroulement de câble ou à un pignon entraînant un secteur denté, pour un mécanisme à bras secteur. L'entrée 16 entraîne la sortie 18 par l'intermédiaire de l'embrayage 22 ; l'embrayage 22 est de préférence entre le moteur 14 et la vis sans fin 24, sur le rotor selon la figure 1. Cette disposition présente l'avantage de nécessiter un embrayage moins encombrant car le couple sur le rotor est inférieur au couple déployé en aval du réducteur (par exemple entre le réducteur et le pignon de sortie ou entre le réducteur et le tambour d'enroulement, où l'embrayage doit être dimensionné plus généreusement pour tenir compte du rapport de réduction). Placé sur le rotor, l'embrayage est par exemple dimensionné de la taille du diamètre de l'induit. L'embrayage 22 est par exemple composé de deux plateaux 26, 28, maintenus en contact lorsque l'embrayage est dans l'état embrayé, transmettant le couple par friction. Les plateaux sont par exemple sur le rotor 16, entre le moteur 14 et la vis sans fin 24. On peut envisager à titre d'exemple, que le plateau 26 est solidaire de la partie du rotor reliée à l'entrée 16 de la transmission, et que le plateau 28 est mobile en translation par rapport à l'autre partie du rotor reliée à la sortie 18. Dans l'état embrayé, le plateau 28 vient en prise avec le plateau 26, permettant ainsi à l'ensemble du mécanisme d'être entraîné ; dans l'état débrayé, le plateau 28 s'éloigne du plateau 26 le long du rotor, la sortie 18 de la transmission n'étant alors plus en prise avec l'entrée 16. Le système anti-pincement comprend aussi des moyens de détection d'un pincement, mais qui ne sont pas représentés sur la figure 1.Figure 1 shows a transmission 12, corresponding to a geared motor. The transmission 12 comprises an inlet 16 and an outlet 18. The mechanism further comprises an electric motor 14 driving the inlet 16. The inlet 16 is connected to the rotor of the motor 14; in Figure 1, the input and the rotor are merged. The outlet 18 may be a reducer comprising a wheel 19 and a worm 24; in the case of a window regulator, the gearbox 18 is connected to a cable winding drum or to a pinion causing a toothed sector, for a power arm mechanism. The inlet 16 drives the outlet 18 via the clutch 22; the clutch 22 is preferably between the motor 14 and the worm 24, on the rotor according to Figure 1. This arrangement has the advantage of requiring a clutch less cumbersome because the torque on the rotor is less than the torque deployed in downstream of the gearbox (for example between the gearbox and the output gear or between the gearbox and the winding drum, where the clutch must be dimensioned more generously to take into account the reduction ratio). Placed on the rotor, the clutch is for example dimensioned the size of the diameter of the armature. The clutch 22 is for example composed of two plates 26, 28, kept in contact when the clutch is in the engaged state, transmitting the torque by friction. The plates are for example on the rotor 16, between the motor 14 and the worm 24. It may be envisaged by way of example that the plate 26 is integral with the portion of the rotor connected to the input 16 of the transmission , and that the plate 28 is movable in translation relative to the other part of the rotor connected to the outlet 18. In the engaged state, the plate 28 engages with the plate 26, thus allowing the entire mechanism to be trained; in the disengaged state, the plate 28 moves away from the plate 26 along the rotor, the output 18 of the transmission then no longer being engaged with the inlet 16. The anti-pinch system also comprises detection means a pinch, but which are not shown in Figure 1.

L'embrayage 22 et les moyens de détection forment le système anti-pincement du mécanisme d'entraînement. Lorsque les moyens de détection détectent un pincement, l'embrayage est passé d'un état embrayé à un état débrayé ; ainsi si un objet tel un doigt est pincé entre la vitre et le cadre de vitre, le mécanisme d'entraînement est débrayé ce qui l'empêche de poursuivre l'entraînement de l'ouvrant dans le sens de la fermeture. L'embrayage permet de désolidariser le moteur d'entraînement du reste de la chaîne cinématique d'entraînement de l'ouvrant. Il peut être prévu que le mécanisme d'entraînement soit ensuite inversé pour libérer l'objet pincé ; l'embrayage 22 est prévu pour embrayer à nouveau le mécanisme d'entraînement et permettre l'entraînement de la vitre dans le sens de la descente. L'embrayage 22 n'est de préférence re-embrayé qu'après inversion du sens de rotation du moteur.The clutch 22 and the detection means form the anti-pinch system of the drive mechanism. When the detection means detect a pinch, the clutch has moved from an engaged state to a disengaged state; thus if an object such as a finger is pinched between the window and the window frame, the drive mechanism is disengaged which prevents it from continuing to drive the opening in the direction of closing. The clutch makes it possible to separate the drive motor from the rest of the driving kinematic chain of the sash. It can be provided that the drive mechanism is then inverted to release the pinched object; the clutch 22 is provided to reengage the drive mechanism and allow the driving of the window in the direction of descent. The clutch 22 is preferably re-engaged only after reversing the direction of rotation of the engine.

A titre d'exemple, l'embrayage 22 est électromagnétique. Ceci permet de débrayer rapidement le mécanisme d'entraînement et de minimiser le pincement. Le débrayage du mécanisme d'entraînement par l'embrayage 22 peut agir, par exemple, en moins de 5 ms ce qui, dans un système typique existant permettrait de réduire de 30 à 40 N la force de pincement, sachant que la limite d'après la norme FMVSS citée précédemment est 100N maxi. De plus, l'embrayage nous offre la possibilité de gagner environ 5ms supplémentaires à peu de frais en remplaçant le relais de commande par un transistor de puissance. Ceci demanderait quatre transistors de puissance pour obtenir le gain équivalent sur le temps de commutation du moteur, ce qui est nettement moins économique. Selon les choix de conception, l'embrayage est soit embrayé soit débrayé en l'absence de courant. Le second cas est préférable d'un point de vue sécuritaire, car la vitre ne peut pas se déplacer si l'embrayage est défaillant. Dans le cadre de la figure 1, l'embrayage 22 peut comprendre une bobine autour de la partie du rotor reliée à la sortie 18, et qui permet le déplacement et le débrayage du plateau 28.For example, the clutch 22 is electromagnetic. This makes it possible to disengage the drive mechanism quickly and to minimize pinching. The disengagement of the drive mechanism by the clutch 22 can act, for example, in less than 5 ms which, in a typical existing system would reduce the clamping force by 30 to 40 N, knowing that the limit of after the FMVSS standard mentioned above is 100N max. In addition, the clutch offers us the possibility of gain about 5ms extra at low cost by replacing the control relay with a power transistor. This would require four power transistors to obtain the equivalent gain over the switching time of the motor, which is significantly less economical. Depending on design choices, the clutch is either engaged or disengaged in the absence of power. The second case is preferable from a safety point of view, because the window can not move if the clutch is faulty. In the context of Figure 1, the clutch 22 may comprise a coil around the portion of the rotor connected to the outlet 18, and which allows the displacement and disengagement of the plate 28.

L'embrayage dans l'état débrayé peut être utilisé en frein. Ceci peut permettre, selon le choix de conception, soit d'accélérer l'arrêt du rotor lorsque le pincement est détecté, en particulier pour contrer l'inertie du moteur, et d'accélérer ainsi l'inversion du moteur pour libérer l'objet coincé, soit d'agir sur la partie de la transmission reliée à la sortie 18 et ainsi à l'ouvrant, ce qui peut avantageusement remplacer d'autres moyens pour créer l'irréversibilité du mouvement de l'ouvrant et contrer les risques d'intrusion dans le véhicule. Le frein consiste par exemple en un organe 30, immobile, sur lequel le plateau 28 vient se plaquer lorsque l'embrayage est ouvert Alternativement, selon la configuration inverse représentée par la figure 2, le plateau 28 est solidaire de la sortie 18. Le plateau 26, alors mobile en translation sur l'arbre moteur 16, vient se plaquer sur l'élément fixe 32 lorsque l'embrayage est ouvert. Cela permet ainsi de freiner l'énergie cinétique du moteur. L'invention se rapporte aussi à un procédé anti-pincement. Le procédé peut être mis en oeuvre dans un mécanisme d'entraînement d'ouvrant de véhicule ; par exemple il peut s'agir d'un lève-vitre décrit précédemment, d'un mécanisme d'entraînement de toit ouvrant ou de porte coulissante ou battante voire de hayon ou de volet de coffre à bagage. Le procédé comprend une première étape de détection d'un pincement. La détection peut être faite par la mesure de la variation du courant d'alimentation ou de la vitesse du moteur ou autre telle qu'une détection sans contact. Le procédé comprend ensuite la commande de débrayage du mécanisme d'entraînement. La commande du débrayage est déclenchée par la détection du pincement ; le procédé permet de désolidariser rapidement le moteur d'entraînement du reste de la chaîne cinématique d'entraînement de l'ouvrant. Le procédé peut ensuite comprendre des étapes supplémentaires d'inversion du sens de rotation du moteur et de re-embrayage du mécanisme d'entraînement une fois le sens de rotation du moteur inversé.The clutch in the disengaged state can be used as a brake. This may allow, depending on the design choice, to accelerate the stopping of the rotor when the pinch is detected, in particular to counter the inertia of the motor, and thus accelerate the inversion of the motor to release the object stuck, either to act on the portion of the transmission connected to the outlet 18 and thus to the opening, which can advantageously replace other means to create the irreversibility of the movement of the opening and counter the risks of intrusion into the vehicle. The brake consists for example of a member 30, immobile, on which the plate 28 is pressed when the clutch is open Alternatively, in the opposite configuration shown in Figure 2, the plate 28 is integral with the output 18. The plateau 26, then mobile in translation on the motor shaft 16, is pressed against the fixed element 32 when the clutch is open. This thus helps to slow down the kinetic energy of the engine. The invention also relates to an anti-pinch method. The method can be implemented in a vehicle opening mechanism; for example it may be a window regulator described above, a sunroof drive mechanism or sliding door or swing or liftgate or luggage compartment flap. The method includes a first step of detecting a nip. The detection can be done by measuring the variation of the supply current or the speed of the motor or other such as non-contact detection. The method then comprises the disengagement control of the drive mechanism. The clutch control is triggered by pinch detection; the method makes it possible to quickly separate the drive motor from the rest of the driving kinematic chain of the sash. The method may then comprise additional steps of reversing the direction of rotation of the motor and re-clutch of the drive mechanism once the direction of rotation of the motor reversed.

Claims (9)

Un système anti-pincement d'un ouvrant de véhicule comprenant : - des moyens de détection d'un pincement, - un embrayage (22) apte à déconnecter l'ouvrant d'un entraînement de l'ouvrant à la suite de la détection d'un pincement par les moyens de détection. An anti-pinch system of a vehicle door comprising: means for detecting a nip, - A clutch (22) adapted to disconnect the opening of a drive of the opening following the detection of a pinch by the detection means. Un mécanisme d'entraînement d'un ouvrant de véhicule comprenant : - le système anti-pincement selon la revendication 1, - une transmission (12) avec une entrée (16) et une sortie (18) reliée à l'ouvrant, l'entrée et la sortie étant solidarisées par l'embrayage (22). A drive mechanism of a vehicle opening comprising: the anti-pinch system according to claim 1, - A transmission (12) with an inlet (16) and an outlet (18) connected to the opening, the inlet and the outlet being secured by the clutch (22). Le mécanisme selon la revendication 2, caractérisé en ce que le mécanisme comporte en outre un moteur électrique (14) d'entraînement de l'entrée (16) et un réducteur entraîné par la sortie (18), l'embrayage (22) étant entre le moteur et le réducteur.The mechanism according to claim 2, characterized in that the mechanism further comprises an electric motor (14) for driving the input (16) and a gearbox driven by the output (18), the clutch (22) being between the motor and the gearbox. Le mécanisme selon la revendication 2 ou 3, caractérisé en ce que l'embrayage (22) est du type électromagnétique.The mechanism according to claim 2 or 3, characterized in that the clutch (22) is of the electromagnetic type. Le mécanisme selon l'une des revendications 2 à 4, caractérisé en ce qu'il comprend en outre un frein agissant soit sur l'entrée soit sur la sortie lorsque l'embrayage est dans l'état débrayé.The mechanism according to one of claims 2 to 4, characterized in that it further comprises a brake acting either on the input or on the output when the clutch is in the disengaged state. Le mécanisme d'entraînement selon l'une des revendications 2 à 5, caractérisé en ce qu'il est un lève-vitre, un mécanisme de toit ouvrant, un mécanisme d'entraînement de porte battante ou coulissante, un mécanisme de hayon ou de volet de coffre à bagages.The drive mechanism according to one of claims 2 to 5, characterized in that it is a window regulator, a sunroof mechanism, a swinging or sliding door drive mechanism, a tailgate mechanism or luggage compartment flap. Procédé anti-pincement dans un mécanisme d'entraînement d'ouvrant de véhicule comprenant les étapes de : - détection d'un pincement, puis - commande de débrayage du mécanisme d'entraînement. An anti-pinch method in a vehicle opening mechanism comprising the steps of: - detection of a pinch, then - disengagement control of the drive mechanism. Le procédé selon la revendication 7, caractérisé en ce que le mécanisme comprend un moteur d'entraînement de l'ouvrant, le procédé comprenant en outre les étapes d'inversion de rotation du moteur puis de re-embrayage du mécanisme d'entraînement.The method of claim 7, characterized in that the mechanism comprises a sash drive motor, the method further comprising the steps of inversion of rotation of the motor and then re-clutch of the drive mechanism. Le procédé selon la revendication 7 ou 8, caractérisé en ce qu'il est mis en oeuvre par le mécanisme selon l'une des revendications 2 à 6.The process according to claim 7 or 8, characterized in that it is carried out by the mechanism according to one of claims 2 to 6.
EP05291491A 2004-07-30 2005-07-11 Anti-pinch system Withdrawn EP1621712A1 (en)

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US20080202885A1 (en) 2008-08-28
US20060022618A1 (en) 2006-02-02
FR2873737B1 (en) 2008-10-31
US7690486B2 (en) 2010-04-06
FR2873737A1 (en) 2006-02-03
US7360635B2 (en) 2008-04-22

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