WO2008080846A1 - Wiping system for motor vehicle window - Google Patents

Wiping system for motor vehicle window Download PDF

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Publication number
WO2008080846A1
WO2008080846A1 PCT/EP2007/064200 EP2007064200W WO2008080846A1 WO 2008080846 A1 WO2008080846 A1 WO 2008080846A1 EP 2007064200 W EP2007064200 W EP 2007064200W WO 2008080846 A1 WO2008080846 A1 WO 2008080846A1
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WO
WIPO (PCT)
Prior art keywords
wiper system
axis
cam profile
main rod
main
Prior art date
Application number
PCT/EP2007/064200
Other languages
French (fr)
Inventor
Denis Grandjean
Franck Cathala
Original Assignee
Valeo Systemes D'essuyage
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Filing date
Publication date
Application filed by Valeo Systemes D'essuyage filed Critical Valeo Systemes D'essuyage
Publication of WO2008080846A1 publication Critical patent/WO2008080846A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/34—Wiper arms; Mountings therefor
    • B60S1/36—Variable-length arms
    • B60S1/365—Variable-length arms the effective length being automatically varied during angular oscillation of the arm
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • B60S1/04—Wipers or the like, e.g. scrapers
    • B60S1/32—Wipers or the like, e.g. scrapers characterised by constructional features of wiper blade arms or blades
    • B60S1/34—Wiper arms; Mountings therefor
    • B60S1/3402—Wiper arms; Mountings therefor with means for obtaining particular wiping patterns
    • B60S1/3406—Wiper arms; Mountings therefor with means for obtaining particular wiping patterns the wiper blades being rotated with respect to the wiper arms around an axis perpendicular to the wiped field

Definitions

  • the present invention relates to a wiper system for a motor vehicle, particularly suitable for wiping a complex surface windshield, such as a panoramic windshield.
  • a windshield is said to be panoramic, especially when it comprises portions of lateral ends which return to the sides of the vehicle, and therefore has on each side an area of very strong curvature.
  • the problem is to be able to effectively wipe not only the front face of the glazing, generally low curvature, but also these portions of lateral extremities very strong curvature.
  • a first factor of optimization of wiping quality is to increase the surface of the windshield actually scanned by the wiper blade.
  • the windscreen wipers comprising a kinematic brush arm called pantograph are known to provide a maximum sweeping surface. Indeed, thanks to the pantograph kinematics, it is possible to print the wiper blade, carried by the arm, a non-circular displacement movement on at least some portions of the windshield (including the lateral end portions) , unlike more conventional wipers for which the path described by the wiper blade is purely circular over the entire surface of the windshield.
  • the wiper arm generally comprises:
  • main rod carrying the blade at one of these ends, the main rod being rotatable, by means of a shaft for rotating an electric motor allowing an alternating sweeping movement, around an axis of main pivoting through the other end;
  • a secondary rod rotatable about a secondary pivot axis parallel but distinct from the main axis.
  • the main and secondary rods are further connected together by a connecting mechanism, typically an "L" shaped link, so as to form, with the body of the vehicle, a deformable quadrilateral called pantograph.
  • the broom is carried by the end link and can thus have an orientation relative to the main and secondary rods which varies according to the relative angular position of these rods during their rotational movement about their respective pivot axis .
  • Another criterion for obtaining quality wiping lies in the angle of attack of the blade, namely the inclination of the blade at its point of connection with the blade arm relative to the normal on the surface of the windshield. During a complete scan in a direction from the wiper rest position to the opposite extreme position, an improvement in wiping quality is obtained if it is possible to vary this angle of attack. of the broom according to the windshield area in which one is located.
  • Document FR 2 875 196 A1 discloses a wiper system of a motor vehicle window, comprising a pantograph kinematic brush arm in which the same angular movement of the pantograph makes it possible to vary not only, in the plane of the main and secondary rods of the arm, the orientation of the blade, but also to vary the angle of attack of the blade, according to the relative angular position of the two rods of the arm.
  • the present invention aims to provide a simple and compact wiper system in which the rotational movement on the one hand, to vary the angle of attack of the broom and the pantograph movement on the other hand , are controlled independently.
  • the subject of the present invention is a wiper system for a motor vehicle window, of the type comprising a pantograph kinematic brush arm comprising a main rod carrying the wiper and intended to be driven in alternating rotation. around a scanning axis by a drive shaft of a motor device, and a secondary rod connected to the main rod so as to allow a variation of the orientation of the blade according to the angular position of said shaft of drive, first control means of the pantograph kinematics, and second control means controlling a rotational movement of the main rod about its longitudinal axis so as to allow a variation of the angle of attack of the brush as a function of the angular position of said drive shaft, characterized in that said first means control the pantograph kinematics by printing at the main rod a m translational opening along its longitudinal axis, and in that said first and second means are adapted to respectively control said translational movement and said rotation movement of the main rod independently.
  • system further comprises a single guide means for guiding the translational movement of the main stem along its longitudinal axis and the rotational movement of the main stem about its longitudinal axis.
  • the system comprises a drive support comprising a housing intended to be mounted to rotate with the drive shaft about the scan axis, the main rod has a end mounted in the housing secured to rotation about the scan axis and free to rotate about its longitudinal axis, and the secondary rod has an end mounted on a peripheral protrusion of the housing, secured to rotate about the scanning axis .
  • the second control means comprise a first cam profile extending in a plane substantially perpendicular to the scanning axis, and a first control member secured to the main rod, said first cam profile being intended to remain stationary and said first control member being adapted to slideably cooperate with the first cam profile during rotation of the drive shaft about the scanning axis to generate said rotational movement of the main stem around its longitudinal axis.
  • the first control means preferably comprise a second cam profile extending in a plane substantially perpendicular to the scan axis, a second control member secured to the housing, said second cam profile being intended to remain stationary and said second control member being able to cooperate by sliding with the second cam profile during rotation of the drive shaft around the scanning axis, and a conversion mechanism linked to the second gear member; control and to the main rod so as to transform the movement related to said sliding into a movement corresponding to said translation movement of the main rod along of its longitudinal axis.
  • said first and second cam profiles are arranged on either side of the scan axis.
  • the system further comprises a cam member placed inside said housing and intended to be fixed on a fixing point of the vehicle, said part carrying said first and second cam profiles.
  • FIG. 1 is a partial bottom exploded view of a wiper system according to a possible embodiment of the invention
  • Figure 2 is a partial perspective cutaway of the assembled system of Figure 1;
  • FIG. 3 is a second partial perspective cutaway view of the wiper system of Figure 1;
  • FIGS. 4a to 4c are bottom views illustrating the respective positions of certain elements of the wiper system according to FIGS. 1 2 and 3, for three distinct positions of the system respectively corresponding to the fixed stop position, to an intermediate position, and at the opposite position fixed stop;
  • FIGS. 5a to 5c are the same views as FIGS. 4a to 4c, in which the piece carrying the cam profiles has been removed.
  • a wiper system for a motor vehicle window includes an arm 1 brush holder (see Figures 2 and 3) to pantograph kinematics allowing a variation of the orientation of the wiper blade (not shown) as a function of the angular position of a drive shaft (not shown) intended to be rotated alternately by a motor device about its axis said sweeping B.
  • the arm 1 brush holder conventionally comprises two rods, a first rod 2 said main carrying the brush, and a second rod 3 called secondary, connected to the main rod 2 by a mechanism of link (not shown) allowing a variation of the relative position of these two rods depending on the angular position of the drive shaft.
  • the control of the pantograph kinematics is performed by various elements forming first control means, which will be described later.
  • the wiper system is such that it is further possible to control a rotational movement of the main rod 2 about its own longitudinal axis R so as to allow a variation of the angle of rotation. broom attack according to the angular position of the drive shaft.
  • the main rod 2 is arranged at the drive mechanism of the wiper system so that its longitudinal axis R is preferably found substantially perpendicular to the scanning axis B.
  • the steering of the Rotational movement of this main rod 2 about its axis R is achieved by second control means whose details will also be given later.
  • the first and second control means are constructed and arranged in the wiper system so that:
  • the first control means control the pantograph kinematics by controlling the translation of the main rod 2 along its longitudinal axis R;
  • the respective commands of the translational movement of the main stem 2 along its axis R, and the rotational movement of the same main stem 2 about its axis R are independent.
  • the ends of the main rods 2 and secondary 3 opposed to those placed near the brush are mounted on a drive carrier 4 to be mounted integral with rotation of the drive shaft around the scan axis B.
  • This drive carrier is preferably in the form of a housing 40 closed by a cover 41, with a central opening 42 ( Figure 2) allowing to fit the support 4 on the drive shaft.
  • the main rod 2 of the wiper arm has an end mounted in the housing 40 so as to be rotatably attached to the housing around the scanning axis B, while being free to rotate axially about its longitudinal axis R.
  • La Secondary rod 3 has an end mounted on a peripheral protrusion 43 of the housing 40, rotatably connected to the housing 40 around the scan axis.
  • each of the main rods 2 and secondary 3 are further articulated along two axes of articulation A1, A2 parallel to each other, and substantially perpendicular to the scan axes B and R rotation. This allows to raise the arm, for example to change the wiper blade.
  • the system further comprises a cam member 5 placed inside the housing 40, coaxially with the scanning axis B, and intended to be fixed rigidly at a point of attachment of the vehicle by via a bracket 6.
  • the second control means controlling the rotational movement of the main stem 2 about its longitudinal axis R are formed of elements carried partly by the main stem 2, and partly by the piece 5. More specifically, these second control means comprise:
  • a first cam profile 50 extending in a plane substantially perpendicular to the scanning axis B;
  • the cam profile 50 is in the form of a through groove formed in the thickness of the fixed part 5.
  • the cam profile 50 is a function of the surface of the cam -brise to wipe, and in particular has non-concentric areas relative to the scanning axis B corresponding to the areas of the windshield for which it is desired that the angle of attack of the wiper blade varies.
  • the control member 20 is formed, as shown in particular in Figure 1 in exploded form, a lever 21 extending radially relative to the main rod 2, and positioned to pass through the groove in position Assembly.
  • One end 22 of this lever 21 is fixed rigidly (for example screwed) to the main rod 2, at a point of the rod noted P in FIG. 1.
  • the other end 23, situated on the other side of the through groove when the system is assembled, carries a contact element 24 preferably mounted freely in axial rotation on the lever 21, in engagement with the cam profile 50, and a retaining element 25 of the contact element 24 on the lever 21 in the assembled position.
  • the contact element 24 is preferably of substantially spherical shape, complementary to the section of the through groove forming the cam profile 50.
  • This contact element 24 is also advantageously slidably mounted along the lever 21, and associated to an elastic member, so as to ensure its contact with the cam profile 50 regardless of the angular position of the main rod 2 relative to its axis R.
  • the sliding assembly makes it possible to compensate for variations in distance between the point of contact. fixing the lever 21 on the main stem 2 on the one hand, and the point of contact of the body of control 20 on the cam profile 50 when the control member slides on the cam profile 50.
  • cam profile 50 on the one hand, and the control member 20 on the other hand are of course achievable without departing from the scope of the present invention, from the moment where the sliding of the control member 20 along the cam profile 50 is able to control the axial rotation of the main rod 2.
  • the rotational mobility of the main rod 2 about its axis R is further guided by means of a guide means, made in the example by two rings 44, 45 fixed in the housing 40, distributed along the main stem 2 and surrounding said rod.
  • FIGS. 4a to 4c Three angular positions of the main rod 2 are visible in the three figures 4a to 4c (or 5a to 5c) for three relative positions of the control member 20 with respect to the cam profile 50. It is found by comparing the three figures, the main rod 2 has rotated about its longitudinal axis R in one direction or the other, depending on whether one is in a portion of the cam profile 50 closer or further from the axis of With the cam profile 50 given by way of example in FIGS. 4a to 4c, it can be seen that the main rod 2 has undergone a rotation between the position represented in FIG. 4a and that represented in FIG. 4b.
  • the first control means controlling the kinematics of the pantograph by translation of the main stem 2 along its longitudinal axis R are formed of elements carried partly by the housing 40, and advantageously partly by the same room 5.
  • these first control means comprise: - on the part 5, a second cam profile 51; a control member 70, integral with the housing 40, and which is able to cooperate by sliding with the second cam profile 51;
  • a conversion mechanism 7 connected on the one hand to the control member 70 and on the other hand to the main rod 2, and making it possible to transform the movement linked to the sliding of the control member 70 on the profile cam 51 in a translation movement of the main rod along its longitudinal axis R.
  • cam profile 51 and the control member 70 are made very similar to the cam profile 50 and the associated control member 20 of the second control means.
  • the cam profile 51 is in the form of a through groove formed in the thickness of the fixed part 5.
  • This cam profile 51 is a function of the surface of the windshield to be wiped, and present in particular non-concentric zones with respect to the scanning axis B corresponding to the areas of the windshield for which it is desired that the orientation of the wiper blade varies.
  • the control member 70 is formed, as visible in particular in Figure 1, a lever 71 positioned to pass through the groove in the assembled position.
  • One end 72 (FIG. 3) of this lever 71 is rigidly fixed (for example screwed) to the conversion mechanism 7.
  • the other end 73 located on the other side of the through groove when the system is assembled, carries an element contact member 74 mounted preferably free in axial rotation on the lever 71, in engagement with the cam profile 51, and a retaining element 75 of the contact element 74 on the lever 71.
  • the contact element 74 is preferably of substantially spherical profile, complementary to the section of the through groove forming the cam profile 51.
  • This contact element 74 is also advantageously slidably mounted along the lever 71, and associated with an elastic element, so as to guaranteeing its contact with the cam profile 51.
  • the sliding assembly makes it possible in particular to compensate for the variations in distance between the attachment point of the lever 71 on the conversion mechanism 7 on the one hand, and the point Contact the control member 70 on the cam profile 51 when the control member slides on the cam profile 51. This precaution is unnecessary in the case where the axis of rotation R is very exactly perpendicular to the scan axis B, but proves to be mandatory in other cases.
  • cam profiles 50 and 51 have been arranged on the part 5 on either side of the scan axis B. This arrangement has the advantage of offering optimum compactness.
  • the conversion mechanism 7 is here in the form of a substantially L-shaped angle gear, extending in a plane substantially parallel to the main rod 2.
  • the end 72 of the body of 70 is rigidly fixed on one end of the L.
  • the other end of the L is connected to the end of the main rod 2, via a ball joint 26 integral with or integral with the main rod 2, so that leaving the main stem 2 free to rotate about its axis of rotation R.
  • the bevel gear includes a receiving cavity 76 for receiving the ball 26, and a lateral groove 77 for the passage of the main rod 2.
  • the width groove 77 is smaller than the size of the ball 26 to allow clipping of the ball in this groove.
  • the volume of the receiving cavity 76 is for its part preferably slightly greater than the size of the ball to allow a certain clearance.
  • the angle gear 7 is mounted in the casing 40 on a pivot 8 so as to ability to pivot about a pivot axis preferably perpendicular to the axis of rotation R.
  • the wiper system is such that the respective movements of translation of the main rod 2 and rotation of the same main stem 2 are controlled completely independently, in particular by the use of two 51, 50 separate cam profiles.
  • the two controls acting on the same main rod, the same guide means, here the two rings 44, 45 can be used.
  • the fact of placing the two cam profiles 50, 51 on the same part 5 makes it possible to obtain a very compact system, the compactness being furthermore optimal thanks to the particular arrangement of the profiles 50, 51 on either side of the scanning axis B.
  • the wiper system has been described in the very favorable case where it is possible to provide that the axis of rotation R extends perpendicular to the scanning axis B. Nevertheless, certain vehicles This arrangement can not be accommodated by automobiles, and the system may be such that the axis of rotation R is not perpendicular to the scanning axis B.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

The invention relates to a wiping system for motor vehicle window, comprised of a pantograph kinematics wiper arm (1) having a main rod (2) rotationally driven in an alternating manner around a sweeping axis (B) by a driving shaft, and a secondary rod (3) linked to the main rod (2) to allow a variation of the orientation of the wiper according to the angular position of said shaft, first control means (7, 70, 51) of the pantograph kinematics, and second control means (20, 50) controlling a rotational movement of the main rod along its longitudinal axis (R) so as to change the attack angle of the wiper relative to the angular position of the said driving shaft. According to the invention, the first means (7, 70, 51) control the pantograph kinematics by imposing on the main rod (2) a translation movement along its longitudinal axis (R), and said first and second means respectively control said translation movement and said rotational movement of the main rod (2), in an independent way.

Description

Description Description
SYSTEME D'ESSUYAGE POUR VITRE DE VEHICULE AUTOMOBILEWINDOW SYSTEM FOR AUTOMOTIVE VEHICLE GLASS
[0001] La présente invention concerne un système d'essuyage pour véhicule automobile, particulièrement adapté à l'essuyage d'un pare-brise de surface complexe, tel qu'un pare-brise panoramique.The present invention relates to a wiper system for a motor vehicle, particularly suitable for wiping a complex surface windshield, such as a panoramic windshield.
[0002] Un pare-brise est dit panoramique notamment lorsqu'il comprend des portions d'extrémités latérales qui reviennent sur les cotés du véhicule, et présente donc de chaque coté une zone de très forte courbure.[0002] A windshield is said to be panoramic, especially when it comprises portions of lateral ends which return to the sides of the vehicle, and therefore has on each side an area of very strong curvature.
[0003] Pour ce type de pare-brise, le problème qui se pose est de pouvoir essuyer efficacement non seulement la face avant du vitrage, généralement à faible courbure, mais aussi ces portions d'extrémités latérales à très forte courbure.For this type of windshield, the problem is to be able to effectively wipe not only the front face of the glazing, generally low curvature, but also these portions of lateral extremities very strong curvature.
[0004] Un premier facteur d'optimisation de la qualité d'essuyage consiste à augmenter la surface du pare-brise effectivement balayée par le balai d'essuyage.A first factor of optimization of wiping quality is to increase the surface of the windshield actually scanned by the wiper blade.
[0005] Les essuie-glaces comportant un bras porte-balai à cinématique dite pantographe sont connus pour offrir une surface de balayage maximale. En effet, grâce à la cinématique pantographe, il est possible d'imprimer au balai d'essuyage, porté par le bras, un mouvement de déplacement non circulaire sur au moins certaines portions du pare-brises (notamment les portions d'extrémités latérales), contrairement à des essuie-glaces plus classiques pour lesquels la trajectoire décrite par le balai d'essuyage est purement circulaire sur toute la surface du pare-brise. Dans les essuie-glaces connus de type pantographe, le bras porte-balai comporte généralement:The windscreen wipers comprising a kinematic brush arm called pantograph are known to provide a maximum sweeping surface. Indeed, thanks to the pantograph kinematics, it is possible to print the wiper blade, carried by the arm, a non-circular displacement movement on at least some portions of the windshield (including the lateral end portions) , unlike more conventional wipers for which the path described by the wiper blade is purely circular over the entire surface of the windshield. In known pantograph wipers, the wiper arm generally comprises:
- une tige principale portant le balai à l'une de ces extrémités, la tige principale étant mobile en rotation, grâce à un arbre d'entraînement en rotation d'un moteur électrique permettant un mouvement de balayage alterné, autour d'un axe de pivotement principal passant par l'autre extrémité; eta main rod carrying the blade at one of these ends, the main rod being rotatable, by means of a shaft for rotating an electric motor allowing an alternating sweeping movement, around an axis of main pivoting through the other end; and
- une tige secondaire, mobile en rotation autour d'un axe de pivotement secondaire parallèle mais distinct de l'axe principal.- A secondary rod, rotatable about a secondary pivot axis parallel but distinct from the main axis.
[0006] Les tiges principale et secondaire sont en outre reliées entre elles par un mécanisme de liaison, typiquement une biellette en forme de « L », de manière à former, avec la caisse du véhicule, un quadrilatère déformable appelé pantographe. Le balai est porté par la biellette d'extrémité et peut présenter de ce fait une orientation par rapport aux tiges principale et secondaire qui varie en fonction de la position angulaire relative de ces tiges lors de leur mouvement de rotation autour de leur axe de pivotement respectif.The main and secondary rods are further connected together by a connecting mechanism, typically an "L" shaped link, so as to form, with the body of the vehicle, a deformable quadrilateral called pantograph. The broom is carried by the end link and can thus have an orientation relative to the main and secondary rods which varies according to the relative angular position of these rods during their rotational movement about their respective pivot axis .
[0007] Un autre critère permettant d'obtenir un essuyage de qualité réside dans l'angle d'attaque du balai, à savoir l'inclinaison du balai au niveau de son point de liaison avec le bras porte-balai par rapport à la normale à la surface du pare-brise. Lors d'un balayage complet dans un sens allant de la position de repos de l'essuie-glace à la position extrême opposée, une amélioration de la qualité d'essuyage est obtenue s'il est possible de faire varier cet angle d'attaque du balai en fonction de la zone de pare-brise dans laquelle on se trouve.Another criterion for obtaining quality wiping lies in the angle of attack of the blade, namely the inclination of the blade at its point of connection with the blade arm relative to the normal on the surface of the windshield. During a complete scan in a direction from the wiper rest position to the opposite extreme position, an improvement in wiping quality is obtained if it is possible to vary this angle of attack. of the broom according to the windshield area in which one is located.
[0008] De nombreux systèmes d'entraînement de balai d'essuie-glace permettant de faire varier l'angle d'attaque du balai ont déjà été proposés.Many wiper blade drive systems to vary the angle of attack of the broom have already been proposed.
[0009] On connaît notamment du document FR 2 875 196 A1 un système d'essuyage d'une vitre de véhicule automobile, comportant un bras porte-balai à cinématique pantographe dans lequel le même mouvement angulaire du pantographe permet de faire varier non seulement, dans le plan des tiges principale et secondaire du bras, l'orientation du balai, mais aussi de faire varier l'angle d'attaque de ce balai, en fonction de la position angulaire relative des deux tiges du bras.Document FR 2 875 196 A1 discloses a wiper system of a motor vehicle window, comprising a pantograph kinematic brush arm in which the same angular movement of the pantograph makes it possible to vary not only, in the plane of the main and secondary rods of the arm, the orientation of the blade, but also to vary the angle of attack of the blade, according to the relative angular position of the two rods of the arm.
[0010] Dans ce système connu, un moyen d'attache auquel est fixé le balai, est placé dans le prolongement de la tige principale, avec possibilité de pivoter autour de son axe. Le mouvement de rotation du moyen d'attache autour de son axe d'une part, permettant de faire varier l'angle d'attaque, et le mouvement pantographe d'autre part, permettant de faire varier l'orientation du balai, sont intimement liés. Plus précisément, le mouvement de rotation est commandé par le mouvement pantographe. En conséquence, il n'est pas possible de faire varier uniquement l'angle d'attaque sans faire varier l'orientation du balai, ni de faire varier uniquement l'orientation du balai sans faire varier l'angle d'attaque. Ceci constitue une limitation car il n'est pas possible d'offrir une commande de balai optimisée en fonction du type de surfaces à essuyer.In this known system, a fastening means which is fixed the brush, is placed in the extension of the main stem, with the possibility of pivoting about its axis. The rotational movement of the attachment means about its axis on the one hand, to vary the angle of attack, and the pantograph movement on the other hand, to vary the orientation of the blade, are intimately linked. More precisely, the rotational movement is controlled by the pantograph movement. Consequently, it is not possible to vary only the angle of attack without varying the orientation of the blade, or to vary only the orientation of the broom without varying the angle of attack. This is a limitation because it is not possible to provide an optimized mop control depending on the type of surfaces to be wiped.
[0011] En outre, dans le système connu du document FR 2 875 196 A1 , le mouvement de rotation du bras est imprimé sur la tige principale du bras, alors que le mouvement pantographe est commandé par translation de la tige secondaire. Il en résulte la nécessité de prévoir deux guidages distincts, l'un pour guider le mouvement de rotation de la tige principale, l'autre pour guider le mouvement de translation de la tige secondaire.In addition, in the known system of FR 2 875 196 A1, the rotational movement of the arm is printed on the main stem of the arm, while the pantograph movement is controlled by translation of the secondary rod. This results in the need to provide two separate guides, one to guide the rotational movement of the main rod, the other to guide the translational movement of the secondary rod.
[0012] La présente invention a pour but de proposer un système d'essuyage simple et compact dans lequel le mouvement de rotation d'une part, permettant de faire varier l'angle d'attaque du balai et le mouvement pantographe d'autre part, sont pilotés de manière indépendante.The present invention aims to provide a simple and compact wiper system in which the rotational movement on the one hand, to vary the angle of attack of the broom and the pantograph movement on the other hand , are controlled independently.
[0013] Pour ce faire, la présente invention a pour objet un système d'essuyage pour vitre de véhicule automobile, du type comportant un bras porte-balai à cinématique pantographe comprenant une tige principale portant le balai et destinée à être entraînée en rotation alternée autour d'un axe de balayage par un arbre d'entraînement d'un dispositif moteur, et une tige secondaire reliée à la tige principale de façon à autoriser une variation de l'orientation du balai en fonction de la position angulaire dudit arbre d'entraînement, des premiers moyens de commande de la cinématique pantographe, et des deuxièmes moyens de commande commandant un mouvement de rotation de la tige principale autour de son axe longitudinal de façon à autoriser une variation de l'angle d'attaque du balai en fonction de la position angulaire dudit arbre d'entraînement, caractérisé en ce que lesdits premiers moyens commandent la cinématique pantographe en imprimant à la tige principale un mouvement de translation selon son axe longitudinal, et en ce que lesdits premiers et deuxièmes moyens sont adaptés pour commander respectivement ledit mouvement de translation et ledit mouvement de rotation de la tige principale de manière indépendante.To do this, the subject of the present invention is a wiper system for a motor vehicle window, of the type comprising a pantograph kinematic brush arm comprising a main rod carrying the wiper and intended to be driven in alternating rotation. around a scanning axis by a drive shaft of a motor device, and a secondary rod connected to the main rod so as to allow a variation of the orientation of the blade according to the angular position of said shaft of drive, first control means of the pantograph kinematics, and second control means controlling a rotational movement of the main rod about its longitudinal axis so as to allow a variation of the angle of attack of the brush as a function of the angular position of said drive shaft, characterized in that said first means control the pantograph kinematics by printing at the main rod a m translational opening along its longitudinal axis, and in that said first and second means are adapted to respectively control said translational movement and said rotation movement of the main rod independently.
[0014] De cette façon, il est possible de décorréler la cinématique pantographe du mouvement de rotation de la tige principale de façon à agir indépendamment soit sur l'angle d'attaque du balai, soit sur son orientation, soit encore sur les deux, et ce en utilisant un nombre optimisé de pièces.In this way, it is possible to decorrelate the pantograph kinematics of the rotational movement of the main stem so as to act independently on the angle of attack of the blade, on its orientation, or on both, using an optimized number of parts.
[0015] Avantageusement, le système comporte en outre un unique moyen de guidage pour guider le mouvement de translation de la tige principale le long de son axe longitudinal ainsi que le mouvement de rotation de cette tige principale autour de son axe longitudinal.Advantageously, the system further comprises a single guide means for guiding the translational movement of the main stem along its longitudinal axis and the rotational movement of the main stem about its longitudinal axis.
[0016] Dans un mode de réalisation préféré du système, le système comporte un support d'entraînement comprenant un boîtier destiné à être monté solidaire en rotation de l'arbre d'entraînement autour de l'axe de balayage, la tige principale présente une extrémité montée dans le boîtier solidaire à rotation autour de l'axe de balayage et libre à rotation autour de son axe longitudinal, et la tige secondaire présente une extrémité montée sur une excroissance périphérique du boîtier, solidaire à rotation autour de l'axe de balayage.In a preferred embodiment of the system, the system comprises a drive support comprising a housing intended to be mounted to rotate with the drive shaft about the scan axis, the main rod has a end mounted in the housing secured to rotation about the scan axis and free to rotate about its longitudinal axis, and the secondary rod has an end mounted on a peripheral protrusion of the housing, secured to rotate about the scanning axis .
[0017] De préférence, les deuxièmes moyens de commande comportent un premier profil de came s'étendant dans un plan sensiblement perpendiculaire à l'axe de balayage, et un premier organe de commande solidaire de la tige principale, ledit premier profil de came étant destiné à rester fixe et ledit premier organe de commande étant apte à coopérer par glissement avec le premier profil de came lors de la rotation de l'arbre d'entraînement autour de l'axe de balayage pour générer ledit mouvement de rotation de la tige principale autour de son axe longitudinal.Preferably, the second control means comprise a first cam profile extending in a plane substantially perpendicular to the scanning axis, and a first control member secured to the main rod, said first cam profile being intended to remain stationary and said first control member being adapted to slideably cooperate with the first cam profile during rotation of the drive shaft about the scanning axis to generate said rotational movement of the main stem around its longitudinal axis.
[0018] En outre, les premiers moyens de commande comportent de préférence un deuxième profil de came s'étendant dans un plan sensiblement perpendiculaire à l'axe de balayage, un deuxième organe de commande solidaire du boîtier, ledit deuxième profil de came étant destiné à rester fixe et ledit deuxième organe de commande étant apte à coopérer par glissement avec le deuxième profil de came lors de la rotation de l'arbre d'entraînement autour de l'axe de balayage, et un mécanisme de conversion lié au deuxième organe de commande et à la tige principale de sorte à transformer le mouvement lié audit glissement en un mouvement correspondant audit mouvement de translation de la tige principale le long de son axe longitudinal. [0019] Avantageusement, lesdits premier et deuxième profils de came sont disposés de part et d'autre de l'axe de balayage. [0020] Dans le mode de réalisation préféré, le système comporte en outre une pièce formant came placée à l'intérieur dudit boîtier et destinée à être fixée sur un point de fixation du véhicule, ladite pièce portant lesdits premier et deuxième profils de came. [0021] D'autres caractéristiques et avantages de l'invention seront mieux compris au vu de la description suivante d'un exemple de réalisation non limitatif d'un système d'essuyage conforme à l'invention, faite en référence aux figures annexées, dans lesquelles:In addition, the first control means preferably comprise a second cam profile extending in a plane substantially perpendicular to the scan axis, a second control member secured to the housing, said second cam profile being intended to remain stationary and said second control member being able to cooperate by sliding with the second cam profile during rotation of the drive shaft around the scanning axis, and a conversion mechanism linked to the second gear member; control and to the main rod so as to transform the movement related to said sliding into a movement corresponding to said translation movement of the main rod along of its longitudinal axis. Advantageously, said first and second cam profiles are arranged on either side of the scan axis. In the preferred embodiment, the system further comprises a cam member placed inside said housing and intended to be fixed on a fixing point of the vehicle, said part carrying said first and second cam profiles. Other features and advantages of the invention will be better understood from the following description of an exemplary non-limiting embodiment of a wiper system according to the invention, with reference to the accompanying figures, in which:
- la figure 1 est une vue de dessous partielle en éclaté d'un système d'essuyage selon un mode de réalisation possible de l'invention ;- Figure 1 is a partial bottom exploded view of a wiper system according to a possible embodiment of the invention;
- la figure 2 est une vue partielle en perspective écorchée du système assemblé de la figure 1 ;- Figure 2 is a partial perspective cutaway of the assembled system of Figure 1;
- la figure 3 est une seconde vue partielle en perspective écorchée du système d'essuyage de la figure 1 ;- Figure 3 is a second partial perspective cutaway view of the wiper system of Figure 1;
- les figures 4a à 4c sont des vues de dessous illustrant les positions respectives de certains éléments du système d'essuyage selon les figures 1 2 et 3, pour trois positions distinctes du système correspondant respectivement à la position arrêt fixe, à une position intermédiaire, et à la position opposée arrêt fixe ;FIGS. 4a to 4c are bottom views illustrating the respective positions of certain elements of the wiper system according to FIGS. 1 2 and 3, for three distinct positions of the system respectively corresponding to the fixed stop position, to an intermediate position, and at the opposite position fixed stop;
- les figures 5a à 5c sont les mêmes vues que les figures 4a à 4c, dans lesquelles la pièce portant les profils de came a été retirée.FIGS. 5a to 5c are the same views as FIGS. 4a to 4c, in which the piece carrying the cam profiles has been removed.
[0022] Pour faciliter la compréhension, les éléments communs à l'ensemble des figures portent les mêmes références. Il est à noter que les différentes représentations ne sont que partielles, en ce sens que tous les éléments constitutifs du système d'essuyage ne sont pas systématiquement représentés pour d'évidentes raisons de clarté. C'est le cas notamment du dispositif moteur, du balai d'essuyage, et des extrémités des tiges principales et secondaires côté balai d'essuyage.For ease of understanding, the elements common to all of the figures bear the same references. It should be noted that the various representations are only partial, in that all the constituent elements of the wiper system are not systematically represented for obvious reasons of clarity. This is particularly the case of the motor device, the wiper blade, and the ends of the main and secondary rod side wiper blade.
[0023] En référence aux figures, un système d'essuyage pour vitre de véhicule automobile comporte un bras 1 porte-balai (voir figures 2 et 3) à cinématique pantographe autorisant une variation de l'orientation du balai d'essuyage (non représenté) en fonction de la position angulaire d'un arbre d'entraînement (non représenté) destiné à être entraîné en rotation alternée par un dispositif moteur autour de son axe dit de balayage B. Pour permettre cette cinématique pantographe, le bras 1 porte-balai comporte classiquement deux tiges, une première tige 2 dite principale portant le balai, et une deuxième tige 3 dite secondaire, reliée à la tige principale 2 par un mécanisme de liaison (non représenté) autorisant une variation de la position relative de ces deux tiges en fonction de la position angulaire de l'arbre d'entraînement.Referring to the figures, a wiper system for a motor vehicle window includes an arm 1 brush holder (see Figures 2 and 3) to pantograph kinematics allowing a variation of the orientation of the wiper blade (not shown) as a function of the angular position of a drive shaft (not shown) intended to be rotated alternately by a motor device about its axis said sweeping B. To allow this pantograph kinematics, the arm 1 brush holder conventionally comprises two rods, a first rod 2 said main carrying the brush, and a second rod 3 called secondary, connected to the main rod 2 by a mechanism of link (not shown) allowing a variation of the relative position of these two rods depending on the angular position of the drive shaft.
[0024] Le pilotage de la cinématique pantographe est réalisé quant à lui par différents éléments formant des premiers moyens de commande, qui seront décrits par la suite.The control of the pantograph kinematics is performed by various elements forming first control means, which will be described later.
[0025] Par ailleurs, le système d'essuyage est tel qu'il est possible en outre de commander un mouvement de rotation de la tige principale 2 autour de son propre axe longitudinal R de façon à autoriser une variation de l'angle d'attaque du balai en fonction de la position angulaire de l'arbre d'entraînement. Comme visible sur les différentes figures, la tige principale 2 est agencée au niveau du mécanisme d'entraînement du système d'essuyage de telle façon que son axe longitudinal R se retrouve de préférence sensiblement perpendiculaire à l'axe de balayage B. Le pilotage du mouvement de rotation de cette tige principale 2 autour de son axe R est réalisé par des deuxièmes moyens de commande dont les détails seront également donnés dans la suite.Furthermore, the wiper system is such that it is further possible to control a rotational movement of the main rod 2 about its own longitudinal axis R so as to allow a variation of the angle of rotation. broom attack according to the angular position of the drive shaft. As shown in the various figures, the main rod 2 is arranged at the drive mechanism of the wiper system so that its longitudinal axis R is preferably found substantially perpendicular to the scanning axis B. The steering of the Rotational movement of this main rod 2 about its axis R is achieved by second control means whose details will also be given later.
[0026] Selon l'invention, les premiers et deuxièmes moyens de commande sont construits et agencés dans le système d'essuyage de façon à ce que :According to the invention, the first and second control means are constructed and arranged in the wiper system so that:
- d'une part, les premiers moyens de commande pilotent la cinématique pantographe en commandant la translation de la tige principale 2 le long de son axe longitudinal R ;on the one hand, the first control means control the pantograph kinematics by controlling the translation of the main rod 2 along its longitudinal axis R;
- d'autre part, les commandes respectives du mouvement de translation de la tige principale 2 le long de son axe R, et du mouvement de rotation de cette même tige principale 2 autour de son axe R soient indépendantes. [0027] Dans l'exemple de réalisation préféré tel qu'illustré sur les figures, les extrémités des tiges principale 2 et secondaire 3 opposées à celles placées à proximité du balai sont montées sur un support d'entraînement 4 destiné à être monté solidaire en rotation de l'arbre d'entraînement autour de l'axe de balayage B. Ce support d'entraînement se présente de préférence sous la forme d'un boîtier 40 fermé par un couvercle 41 , avec une ouverture centrale 42 (figure 2) permettant d'emboîter le support 4 sur l'arbre d'entraînement. La tige principale 2 du bras porte-balai présente une extrémité montée dans le boîtier 40 de manière à être solidaire à rotation du boîtier autour de l'axe de balayage B, tout en étant libre à rotation axiale autour de son axe longitudinal R. La tige secondaire 3 présente quant à elle une extrémité montée sur une excroissance périphérique 43 du boîtier 40, solidaire à rotation du boîtier 40 autour de l'axe de balayage.- On the other hand, the respective commands of the translational movement of the main stem 2 along its axis R, and the rotational movement of the same main stem 2 about its axis R are independent. In the preferred embodiment as shown in the figures, the ends of the main rods 2 and secondary 3 opposed to those placed near the brush are mounted on a drive carrier 4 to be mounted integral with rotation of the drive shaft around the scan axis B. This drive carrier is preferably in the form of a housing 40 closed by a cover 41, with a central opening 42 (Figure 2) allowing to fit the support 4 on the drive shaft. The main rod 2 of the wiper arm has an end mounted in the housing 40 so as to be rotatably attached to the housing around the scanning axis B, while being free to rotate axially about its longitudinal axis R. La Secondary rod 3 has an end mounted on a peripheral protrusion 43 of the housing 40, rotatably connected to the housing 40 around the scan axis.
[0028] Avantageusement, chacune des tiges principale 2 et secondaire 3 sont en outre articulées suivant deux axes d'articulation A1 , A2 parallèles entre eux, et sensiblement perpendiculaires aux axes de balayage B et de rotation R. Cela permet de relever le bras, par exemple pour changer le balai d'essuyage.Advantageously, each of the main rods 2 and secondary 3 are further articulated along two axes of articulation A1, A2 parallel to each other, and substantially perpendicular to the scan axes B and R rotation. This allows to raise the arm, for example to change the wiper blade.
[0029] Le système comporte en outre une pièce 5 formant came placée à l'intérieur du boîtier 40, de façon coaxiale à l'axe de balayage B, et destinée à être fixée rigidement au niveau d'un point de fixation du véhicule par l'intermédiaire d'une patte de fixation 6.The system further comprises a cam member 5 placed inside the housing 40, coaxially with the scanning axis B, and intended to be fixed rigidly at a point of attachment of the vehicle by via a bracket 6.
[0030] Lorsque le système est en place sur le véhicule, la rotation de l'arbre d'entraînement autour de l'axe de balayage B doit entraîner en rotation le support d'entraînement 4 alors que la pièce formant came 5 reste fixe. Ceci est notamment visible sur les figures 4a-4c montrant, pour trois positions du système correspondant à trois positions angulaires différentes de l'arbre d'entraînement, que la pièce 5 reste fixe pour les trois figures, alors que le boîtier 40 a tourné.When the system is in place on the vehicle, the rotation of the drive shaft around the scan axis B must rotate the drive carrier 4 while the cam member 5 remains fixed. This is particularly visible in Figures 4a-4c showing, for three system positions corresponding to three different angular positions of the drive shaft, that the part 5 remains fixed for the three figures, while the housing 40 has rotated.
[0031] Les deuxièmes moyens de commande commandant le mouvement de rotation de la tige principale 2 autour de son axe longitudinal R sont formés d'éléments portés pour partie par la tige principale 2, et pour partie par la pièce 5. [0032] Plus précisément, ces deuxièmes moyens de commande comportent :The second control means controlling the rotational movement of the main stem 2 about its longitudinal axis R are formed of elements carried partly by the main stem 2, and partly by the piece 5. More specifically, these second control means comprise:
- d'une part, sur la pièce 5, un premier profil de came 50 s'étendant dans un plan sensiblement perpendiculaire à l'axe de balayage B ;on the one hand, on the part 5, a first cam profile 50 extending in a plane substantially perpendicular to the scanning axis B;
- d'autre part, un organe de commande 20 solidaire de la tige principale 2, et qui est à même de coopérer par glissement avec le premier profil de came 50.- On the other hand, a control member 20 integral with the main rod 2, and which is able to cooperate by sliding with the first cam profile 50.
[0033] Dans l'exemple de réalisation préférentiel illustré, le profil de came 50 se présente sous la forme d'une rainure traversante ménagée dans l'épaisseur de la pièce fixe 5. Le profil de came 50 est fonction de la surface de pare-brise à essuyer, et présente notamment des zones non concentriques par rapport à l'axe de balayage B correspondant aux zones du pare-brise pour lesquelles on souhaite que l'angle d'attaque du balai d'essuyage varie.In the preferred embodiment illustrated, the cam profile 50 is in the form of a through groove formed in the thickness of the fixed part 5. The cam profile 50 is a function of the surface of the cam -brise to wipe, and in particular has non-concentric areas relative to the scanning axis B corresponding to the areas of the windshield for which it is desired that the angle of attack of the wiper blade varies.
[0034] L'organe de commande 20 est formé, comme visible notamment sur la figure 1 sous forme éclatée, d'un levier 21 s'étendant radialement par rapport à la tige principale 2, et positionné de manière à traverser la rainure en position assemblée. Une extrémité 22 de ce levier 21 est fixée rigidement (par exemple vissée) à la tige principale 2, au niveau d'un point de la tige noté P sur la figure 1. L'autre extrémité 23, située de l'autre côté de la rainure traversante lorsque le système est assemblé, porte un élément de contact 24 monté de préférence libre en rotation axiale sur le levier 21 , en prise avec le profil de came 50, et un élément de retenue 25 de l'élément de contact 24 sur le levier 21 en position assemblée. L'élément de contact 24 est de préférence de forme sensiblement sphérique, complémentaire à la section de la rainure traversante formant le profil de came 50. Cet élément de contact 24 est en outre avantageusement monté mobile en coulissement le long du levier 21 , et associé à un élément élastique, de sorte à garantir son contact avec le profil de came 50 quelle que soit la position angulaire de la tige principale 2 par rapport à son axe R. Le montage coulissant permet notamment de compenser les variations de distance entre le point de fixation du levier 21 sur la tige principale 2 d'une part, et le point de contact de l'organe de commande 20 sur le profil de came 50 lorsque l'organe de commande glisse sur le profil de came 50.The control member 20 is formed, as shown in particular in Figure 1 in exploded form, a lever 21 extending radially relative to the main rod 2, and positioned to pass through the groove in position Assembly. One end 22 of this lever 21 is fixed rigidly (for example screwed) to the main rod 2, at a point of the rod noted P in FIG. 1. The other end 23, situated on the other side of the through groove when the system is assembled, carries a contact element 24 preferably mounted freely in axial rotation on the lever 21, in engagement with the cam profile 50, and a retaining element 25 of the contact element 24 on the lever 21 in the assembled position. The contact element 24 is preferably of substantially spherical shape, complementary to the section of the through groove forming the cam profile 50. This contact element 24 is also advantageously slidably mounted along the lever 21, and associated to an elastic member, so as to ensure its contact with the cam profile 50 regardless of the angular position of the main rod 2 relative to its axis R. The sliding assembly makes it possible to compensate for variations in distance between the point of contact. fixing the lever 21 on the main stem 2 on the one hand, and the point of contact of the body of control 20 on the cam profile 50 when the control member slides on the cam profile 50.
[0035] D'autres modes de réalisation pour le profil de came 50 d'une part, et pour l'organe de commande 20 d'autre part, sont bien entendu réalisables sans départir du cadre de la présente invention, à partir du moment où le glissement de l'organe de commande 20 le long du profil de came 50 est apte à commander la rotation axiale de la tige principale 2.Other embodiments for the cam profile 50 on the one hand, and the control member 20 on the other hand, are of course achievable without departing from the scope of the present invention, from the moment where the sliding of the control member 20 along the cam profile 50 is able to control the axial rotation of the main rod 2.
[0036] La mobilité en rotation de la tige principale 2 autour de son axe R est en outre guidée par l'intermédiaire d'un moyen de guidage, réalisé dans l'exemple par deux bagues 44, 45 fixées dans le boîtier 40, réparties le long de la tige principale 2 et entourant ladite tige.The rotational mobility of the main rod 2 about its axis R is further guided by means of a guide means, made in the example by two rings 44, 45 fixed in the housing 40, distributed along the main stem 2 and surrounding said rod.
[0037] Trois positions angulaires de la tige principale 2 sont visibles sur les trois figures 4a à 4c (ou 5a à 5c) pour trois positionnements relatifs de l'organe de commande 20 par rapport au profil de came 50. On constate en comparant les trois figures, que la tige principale 2 a tourné autour de son axe longitudinal R dans un sens ou dans l'autre, selon que l'on se trouve dans une portion du profil de came 50 plus proche ou plus éloigné de l'axe de balayage B. Avec le profil de came 50 donné à titre d'exemple sur les figures 4a à 4c, on constate que la tige principale 2 a subi, entre la position représentée sur la figure 4a et celle représentée sur la figure 4b, une rotation sur elle-même dans un premier sens car l'élément de contact 24, en glissant sur le profil de came 50, s'est éloigné de l'axe de balayage B par rapport à la position représentée sur la figure 4a. A l'inverse, la tige principale 2 a subi une rotation sur elle-même dans le sens inverse entre la position représentée sur la figure 4b et celle représentée sur la figure 4c, car l'élément de contact 24, en glissant sur la portion correspondante du profil de came 50, s'est au contraire rapproché de l'axe de balayage B.Three angular positions of the main rod 2 are visible in the three figures 4a to 4c (or 5a to 5c) for three relative positions of the control member 20 with respect to the cam profile 50. It is found by comparing the three figures, the main rod 2 has rotated about its longitudinal axis R in one direction or the other, depending on whether one is in a portion of the cam profile 50 closer or further from the axis of With the cam profile 50 given by way of example in FIGS. 4a to 4c, it can be seen that the main rod 2 has undergone a rotation between the position represented in FIG. 4a and that represented in FIG. 4b. on itself in a first direction because the contact element 24, sliding on the cam profile 50, has moved away from the scanning axis B with respect to the position shown in Figure 4a. Conversely, the main rod 2 has been rotated on itself in the opposite direction between the position shown in FIG. 4b and that represented in FIG. 4c, since the contact element 24, by sliding on the portion corresponding cam profile 50, on the contrary is closer to the scanning axis B.
[0038] Par ailleurs, les premiers moyens de commande commandant la cinématique du pantographe par translation de la tige principale 2 le long de son axe longitudinal R sont formés d'éléments portés pour partie par le boîtier 40, et avantageusement pour partie par la même pièce 5.Furthermore, the first control means controlling the kinematics of the pantograph by translation of the main stem 2 along its longitudinal axis R are formed of elements carried partly by the housing 40, and advantageously partly by the same room 5.
[0039] Plus précisément, ces premiers moyens de commande comportent : - sur la pièce 5, un deuxième profil de came 51 ; - un organe de commande 70, solidaire du boîtier 40, et qui est à même de coopérer par glissement avec le deuxième profil de came 51 ;More specifically, these first control means comprise: - on the part 5, a second cam profile 51; a control member 70, integral with the housing 40, and which is able to cooperate by sliding with the second cam profile 51;
- un mécanisme 7 de conversion lié d'une part, à l'organe de commande 70, et d'autre part à la tige principale 2, et permettant de transformer le mouvement lié au glissement de l'organe de commande 70 sur le profil de came 51 en un mouvement de translation de la tige principale le long de son axe longitudinal R.a conversion mechanism 7 connected on the one hand to the control member 70 and on the other hand to the main rod 2, and making it possible to transform the movement linked to the sliding of the control member 70 on the profile cam 51 in a translation movement of the main rod along its longitudinal axis R.
[0040] Dans le mode de réalisation non limitatif représenté, le profil de came 51 et l'organe de commande 70 sont réalisés de façon très similaire au profil de came 50 et à l'organe de commande 20 associé des deuxièmes moyens de commande.In the non-limiting embodiment shown, the cam profile 51 and the control member 70 are made very similar to the cam profile 50 and the associated control member 20 of the second control means.
[0041] Ainsi, le profil de came 51 se présente sous la forme d'une rainure traversante ménagée dans l'épaisseur de la pièce fixe 5. Ce profil de came 51 est fonction de la surface de pare-brise à essuyer, et présente notamment des zones non concentriques par rapport à l'axe de balayage B correspondant aux zones du pare-brise pour lesquelles on souhaite que l'orientation du balai d'essuyage varie.Thus, the cam profile 51 is in the form of a through groove formed in the thickness of the fixed part 5. This cam profile 51 is a function of the surface of the windshield to be wiped, and present in particular non-concentric zones with respect to the scanning axis B corresponding to the areas of the windshield for which it is desired that the orientation of the wiper blade varies.
[0042] L'organe de commande 70 est formé, comme visible notamment sur la figure 1 , d'un levier 71 positionné de manière à traverser la rainure en position assemblée. Une extrémité 72 (figure 3) de ce levier 71 est fixée rigidement (par exemple vissée) au mécanisme de conversion 7. L'autre extrémité 73, située de l'autre côté de la rainure traversante lorsque le système est assemblé, porte un élément de contact 74 monté de préférence libre en rotation axiale sur le levier 71 , en prise avec le profil de came 51 , et un élément de retenue 75 de l'élément de contact 74 sur le levier 71. L'élément de contact 74 est de préférence de profil sensiblement sphérique, complémentaire à la section de la rainure traversante formant le profil de came 51. Cet élément de contact 74 est en outre avantageusement monté mobile en coulissement le long du levier 71 , et associé à un élément élastique, de sorte à garantir son contact avec le profil de came 51. Le montage coulissant permet notamment de compenser les variations de distance entre le point de fixation du levier 71 sur le mécanisme de conversion 7 d'une part, et le point de contact de l'organe de commande 70 sur le profil de came 51 lorsque l'organe de commande glisse sur le profil de came 51. Cette précaution est inutile dans le cas où l'axe de rotation R est très exactement perpendiculaire à l'axe de balayage B, mais s'avère être obligatoire dans les autres cas.The control member 70 is formed, as visible in particular in Figure 1, a lever 71 positioned to pass through the groove in the assembled position. One end 72 (FIG. 3) of this lever 71 is rigidly fixed (for example screwed) to the conversion mechanism 7. The other end 73, located on the other side of the through groove when the system is assembled, carries an element contact member 74 mounted preferably free in axial rotation on the lever 71, in engagement with the cam profile 51, and a retaining element 75 of the contact element 74 on the lever 71. The contact element 74 is preferably of substantially spherical profile, complementary to the section of the through groove forming the cam profile 51. This contact element 74 is also advantageously slidably mounted along the lever 71, and associated with an elastic element, so as to guaranteeing its contact with the cam profile 51. The sliding assembly makes it possible in particular to compensate for the variations in distance between the attachment point of the lever 71 on the conversion mechanism 7 on the one hand, and the point Contact the control member 70 on the cam profile 51 when the control member slides on the cam profile 51. This precaution is unnecessary in the case where the axis of rotation R is very exactly perpendicular to the scan axis B, but proves to be mandatory in other cases.
[0043] On constate sur les figures que les profils de came 50 et 51 ont été disposés sur la pièce 5 de part et d'autre de l'axe de balayage B. Cette disposition présente l'avantage d'offrir une compacité optimum.It is noted in the figures that the cam profiles 50 and 51 have been arranged on the part 5 on either side of the scan axis B. This arrangement has the advantage of offering optimum compactness.
[0044] Le mécanisme 7 de conversion se présente ici sous la forme d'un renvoi d'angle sensiblement en forme de L, s'étendant dans un plan sensiblement parallèle à la tige principale 2. L'extrémité 72 de l'organe de commande 70 est fixée rigidement sur une extrémité du L. L'autre extrémité du L est reliée à l'extrémité de la tige principale 2, par l'intermédiaire d'une rotule 26 solidaire ou partie intégrante de la tige principale 2, de façon à laisser la tige principale 2 libre de tourner autour de son axe de rotation R. Le renvoi d'angle comporte une cavité de réception 76 pour recevoir la rotule 26, et une rainure latérale 77 pour le passage de la tige principale 2. La largeur de la rainure 77 est inférieure à la taille de la rotule 26 pour permettre le clipsage de la rotule dans cette rainure. Le volume de la cavité de réception 76 est quant à lui de préférence légèrement supérieur à la taille de la rotule pour autoriser un certain jeu. Par ailleurs, le renvoi d'angle 7 est monté dans le boîtier 40 sur un pivot 8 de manière à pouvoir pivoter autour d'un axe de pivotement de préférence perpendiculaire à l'axe de rotation R.The conversion mechanism 7 is here in the form of a substantially L-shaped angle gear, extending in a plane substantially parallel to the main rod 2. The end 72 of the body of 70 is rigidly fixed on one end of the L. The other end of the L is connected to the end of the main rod 2, via a ball joint 26 integral with or integral with the main rod 2, so that leaving the main stem 2 free to rotate about its axis of rotation R. The bevel gear includes a receiving cavity 76 for receiving the ball 26, and a lateral groove 77 for the passage of the main rod 2. The width groove 77 is smaller than the size of the ball 26 to allow clipping of the ball in this groove. The volume of the receiving cavity 76 is for its part preferably slightly greater than the size of the ball to allow a certain clearance. Moreover, the angle gear 7 is mounted in the casing 40 on a pivot 8 so as to ability to pivot about a pivot axis preferably perpendicular to the axis of rotation R.
[0045] Lorsque le boîtier 40 est entraîné en rotation autour de l'axe de balayage B, l'organe de commande 70 en glissant sur le profil de came 51 , va entraîner le renvoi d'angle 7 en pivotement autour de l'axe de pivotement du pivot 8, entraînant un mouvement de translation de la tige principale le long de son axe R, dans un sens ou dans un autre, selon que l'on se trouve dans une portion du profil de came 51 plus proche ou plus éloigné de l'axe de balayage B. Avec le profil de came 51 donné à titre d'exemple sur les figures 4a à 4c, on constate que la tige principale 2 a subi, entre la position représentée sur la figure 4a et celle représentée sur la figure 4b, une translation dans le sens de la flèche F1 (figure 4b) car l'élément de contact 74, en glissant sur le profil de came 51 , s'est éloigné de l'axe de balayage B par rapport à la position représentée sur la figure 4a. A l'inverse, la tige principale 2 a subi une translation dans le sens de la flèche F2 (figure 4c) entre la position représentée sur la figure 4b et celle représentée sur la figure 4c, car l'élément de contact 24, en glissant sur la portion correspondante du profil de came 51 , s'est au contraire rapproché de l'axe de balayage B. Les mouvements de translation de la tige principale 2 vont animer la cinématique du pantographe de manière à faire varier l'orientation du balai.When the housing 40 is rotated about the scan axis B, the control member 70 sliding on the cam profile 51, will cause the angle of rotation 7 pivoting about the axis pivoting the pivot 8, causing a translational movement of the main rod along its axis R, in one direction or another, depending on whether one is in a portion of the cam profile 51 closer or more distant of the scanning axis B. With the cam profile 51 given by way of example in FIGS. 4a to 4c, it can be seen that the main rod 2 has undergone, between the position represented in FIG. 4a and that represented on FIG. FIG. 4b, a translation in the direction of the arrow F1 (FIG. 4b) because the element of contact 74, sliding on the cam profile 51, has moved away from the scanning axis B relative to the position shown in Figure 4a. Conversely, the main rod 2 has been translated in the direction of the arrow F2 (Figure 4c) between the position shown in Figure 4b and that shown in Figure 4c, since the contact element 24, sliding on the corresponding portion of the cam profile 51, on the contrary is closer to the scan axis B. The translation movements of the main rod 2 will animate the kinematics of the pantograph so as to vary the orientation of the brush.
[0046] Grâce à l'invention, le système d'essuyage est tel que les mouvements respectifs de translation de la tige principale 2 et de rotation de cette même tige principale 2 sont pilotés de manière complètement indépendante, notamment par l'utilisation de deux profils de came 51 , 50 distincts. En outre, les deux commandes agissant sur la même tige principale, le même moyen de guidage, ici les deux bagues 44, 45, peut être utilisé. Enfin, le fait de placer les deux profils de came 50, 51 sur une même pièce 5 permet d'obtenir un système très compact, la compacité étant en outre optimale grâce à la disposition particulière des profils 50, 51 de part et d'autre de l'axe de balayage B.Thanks to the invention, the wiper system is such that the respective movements of translation of the main rod 2 and rotation of the same main stem 2 are controlled completely independently, in particular by the use of two 51, 50 separate cam profiles. In addition, the two controls acting on the same main rod, the same guide means, here the two rings 44, 45 can be used. Finally, the fact of placing the two cam profiles 50, 51 on the same part 5 makes it possible to obtain a very compact system, the compactness being furthermore optimal thanks to the particular arrangement of the profiles 50, 51 on either side of the scanning axis B.
[0047] Dans ce qui précède, le système d'essuyage a été décrit dans le cas très favorable où il est possible de prévoir que l'axe de rotation R s'étend perpendiculairement à l'axe de balayage B. Néanmoins, certains véhicules automobiles ne permettent pas cet agencement, et le système peut être tel que l'axe de rotation R ne soit pas perpendiculaire à l'axe de balayage B. In the foregoing, the wiper system has been described in the very favorable case where it is possible to provide that the axis of rotation R extends perpendicular to the scanning axis B. Nevertheless, certain vehicles This arrangement can not be accommodated by automobiles, and the system may be such that the axis of rotation R is not perpendicular to the scanning axis B.

Claims

Revendications claims
1. Système d'essuyage pour vitre de véhicule automobile, du type comportant un bras (1) porte-balai à cinématique pantographe comprenant une tige principale (2) portant le balai et destinée à être entraînée en rotation alternée autour d'un axe de balayage (B) par un arbre d'entraînement d'un dispositif moteur, et une tige secondaire (3) reliée à la tige principale (2) de façon à autoriser une variation de l'orientation du balai en fonction de la position angulaire dudit arbre d'entraînement, des premiers moyens (7, 70, 51) de commande de la cinématique pantographe, et des deuxièmes moyens (20, 50) de commande commandant un mouvement de rotation de la tige principale autour de son axe longitudinal (R) de façon à autoriser une variation de l'angle d'attaque du balai en fonction de la position angulaire dudit arbre d'entraînement, caractérisé en ce que lesdits premiers moyens (J, 70, 51) commandent la cinématique pantographe en imprimant à la tige principale (2) un mouvement de translation selon son axe longitudinal (R), et en ce que lesdits premiers et deuxièmes moyens sont adaptés pour commander respectivement ledit mouvement de translation et ledit mouvement de rotation de la tige principale (2) de manière indépendante.1. A wiper system for motor vehicle windows, of the type comprising an arm (1) brush holder with kinematic pantograph comprising a main rod (2) carrying the blade and intended to be driven in alternating rotation about an axis of sweeping (B) by a driving shaft of a motor device, and a secondary rod (3) connected to the main rod (2) so as to allow a variation of the orientation of the blade according to the angular position of said driving shaft, first control means (7, 70, 51) for the pantograph kinematics, and second control means (20, 50) controlling a rotational movement of the main rod about its longitudinal axis (R) so as to allow a variation of the angle of attack of the blade according to the angular position of said drive shaft, characterized in that said first means (J, 70, 51) control the pantograph kinematics by printing at the rod main (2) u n translational movement along its longitudinal axis (R), and in that said first and second means are adapted to respectively control said translational movement and said rotational movement of the main rod (2) independently.
2. Système d'essuyage selon la revendication 1 , caractérisé en ce qu'il comporte un support d'entraînement (4) comprenant un boîtier (40) destiné à être monté solidaire en rotation de l'arbre d'entraînement autour de l'axe de balayage (B), en ce que la tige principale (2) présente une extrémité montée dans le boîtier (40) solidaire à rotation autour de l'axe de balayage (B) et libre à rotation autour de son axe longitudinal (R), et en ceque la tige secondaire (3) présente une extrémité montée sur une excroissance périphérique (43) du boîtier (40), solidaire à rotation autour de l'axe de balayage (B).2. Wiper system according to claim 1, characterized in that it comprises a drive carrier (4) comprising a housing (40) intended to be mounted integral in rotation with the drive shaft around the scanning axis (B), in that the main stem (2) has an end mounted in the housing (40) integral with rotation about the scanning axis (B) and free to rotate about its longitudinal axis (R ), and in that the secondary rod (3) has an end mounted on a peripheral protrusion (43) of the housing (40), secured to rotate about the scanning axis (B).
3. Système d'essuyage selon l'une quelconque des revendications précédentes, caractérisé en ce que les deuxièmes moyens de commande (20, 50) comportent un premier profil de came (50) s'étendant dans un plan sensiblement perpendiculaire à l'axe de balayage (B), et un premier organe de commande (20) solidaire de la tige principale (2), ledit premier profil de came (50) étant destiné à rester fixe et ledit premier organe de commande (20) étant apte à coopérer par glissement avec le premier profil de came (50) lors de la rotation de l'arbre d'entraînement autour de l'axe de balayage (B) pour générer ledit mouvement de rotation de la tige principale (2) autour de son axe longitudinal (R).Wiper system according to one of the preceding claims, characterized in that the second control means (20, 50) comprise a first cam profile (50) extending in a plane substantially perpendicular to the axis. sweeping device (B), and a first control member (20) integral with the main stem (2), said first cam profile (50) being intended to remain fixed and said first control member (20) being able to cooperate by sliding with the first cam profile (50) during the rotating the drive shaft about the scan axis (B) to generate said rotational movement of the main shaft (2) about its longitudinal axis (R).
4. Système d'essuyage selon l'une quelconque des revendications 2 et 3, caractérisé en ce que les premiers moyens de commande (7, 70, 51) comportent un deuxième profil de came (51) s'étendant dans un plan sensiblement perpendiculaire à l'axe de balayage (B), un deuxième organe de commande (70) solidaire du boîtier (40), ledit deuxième profil de came (51) étant destiné à rester fixe et ledit deuxième organe de commande (70) étant apte à coopérer par glissement avec le deuxième profil de came (51) lors de la rotation de l'arbre d'entraînement autour de l'axe de balayage (B), et un mécanisme de conversion (7) lié au deuxième organe de commande (70) et à la tige principale (2) de sorte à transformer le mouvement lié audit glissement en un mouvement correspondant audit mouvement de translation de la tige principale (2) le long de son axe longitudinal (R).4. Wiper system according to any one of claims 2 and 3, characterized in that the first control means (7, 70, 51) comprise a second cam profile (51) extending in a substantially perpendicular plane at the scanning axis (B), a second control member (70) integral with the housing (40), said second cam profile (51) being intended to remain stationary and said second control member (70) being adapted to slidingly cooperating with the second cam profile (51) during rotation of the drive shaft about the scanning axis (B), and a conversion mechanism (7) connected to the second control member (70); ) and the main rod (2) so as to transform the movement associated with said sliding into a movement corresponding to said translation movement of the main rod (2) along its longitudinal axis (R).
5. Système d'essuyage selon les revendications 3 et 4, caractérisé en ce que lesdits premier (50) et deuxième (51) profils de came sont disposés de part et d'autre de l'axe de balayage (B).5. Wiper system according to claims 3 and 4, characterized in that said first (50) and second (51) cam profiles are disposed on either side of the scan axis (B).
6. Système d'essuyage selon les revendications 3 et 4, prises en combinaison avec la revendication 2, caractérisé en ce qu'il comporte en outre une pièce (5) formant came placée à l'intérieur dudit boîtier (40) et destinée à être fixée sur un point de fixation du véhicule, ladite pièce (5) portant lesdits premier (50) et deuxième (51) profils de came.6. A wiper system according to claims 3 and 4, taken in combination with claim 2, characterized in that it further comprises a piece (5) forming a cam placed inside said housing (40) and intended for to be fixed on a point of attachment of the vehicle, said part (5) carrying said first (50) and second (51) cam profiles.
7. Système d'essuyage selon la revendication 6, caractérisé en ce que le premier profil de came (50) est une rainure traversante ménagée dans l'épaisseur de ladite pièce (5).7. A wiper system according to claim 6, characterized in that the first cam profile (50) is a through groove formed in the thickness of said piece (5).
8. Système d'essuyage selon la revendication 7, caractérisé en ce que le premier organe de commande (20) comporte un levier (21) s'étendant radialement par rapport à la tige principale (2), dont une extrémité est fixée rigidement à la tige principale (2), et positionné de manière à traverser la rainure formant le premier profil de came (50), l'autre extrémité du levier (21) portant un élément de contact (24) venant en prise avec ledit premier profil de came (50).8. A wiper system according to claim 7, characterized in that the first control member (20) comprises a lever (21) extending radially relative to the main rod (2), one end of which is fixed rigidly to the main rod (2), and positioned so as to pass through the groove forming the first cam profile (50), the other end of the lever (21) carrying a contact element (24) engaging with said first profile of cam (50).
9. Système d'essuyage selon la revendication 8, caractérisé en ce que ledit élément de contact (24) est de forme sensiblement sphérique, complémentaire à la section de la rainure formant le premier profil de came (50).9. Wiper system according to claim 8, characterized in that said contact element (24) is substantially spherical in shape, complementary to the section of the groove forming the first cam profile (50).
10. Système d'essuyage selon l'une quelconque des revendications 8 ou 9, caractérisé en ce que ledit élément de contact (24) est monté mobile en coulissement le long du levier (21) de sorte à garantir son contact avec le premier profil de came (50) quelle que soit la position angulaire de la tige principale (2) par rapport à son axe longitudinal (R).10. A wiper system according to any one of claims 8 or 9, characterized in that said contact element (24) is slidably mounted along the lever (21) so as to ensure its contact with the first profile. cam (50) regardless of the angular position of the main rod (2) relative to its longitudinal axis (R).
11. Système d'essuyage selon l'une quelconque des revendications 6 à 10, caractérisé en ce que le deuxième profil de came (51) est une rainure traversante ménagée dans l'épaisseur de ladite pièce (5).11. A wiper system according to any one of claims 6 to 10, characterized in that the second cam profile (51) is a through groove formed in the thickness of said part (5).
12. Système d'essuyage selon la revendication 11 , caractérisé en ce que le deuxième organe de commande (70) comporte un levier (71) dont une extrémité (72) est fixée rigidement au mécanisme de conversion (7), et positionné de manière à traverser la rainure formant le deuxième profil de came (51), l'autre extrémité dudit levier (71) portant un élément de contact (74) venant en prise avec ledit deuxième profil de came (51).12. A wiper system according to claim 11, characterized in that the second control member (70) comprises a lever (71), one end (72) of which is fixed rigidly to the conversion mechanism (7), and positioned in such a manner traversing the groove forming the second cam profile (51), the other end of said lever (71) carrying a contact member (74) engaging said second cam profile (51).
13. Système d'essuyage selon la revendication 12, caractérisé en ce que ledit élément de contact (74) est de forme sensiblement sphérique, complémentaire à la section de la rainure formant le deuxième profil de came (51).13. Wiper system according to claim 12, characterized in that said contact element (74) is of substantially spherical shape, complementary to the section of the groove forming the second cam profile (51).
14. Système d'essuyage selon l'une quelconque des revendications 4 à 13, caractérisé en ce que le mécanisme de conversion (7) est un renvoi d'angle sensiblement en forme de L, s'étendant dans un plan sensiblement parallèle à l'axe de rotation (R) de la tige principale (2).Wiper system according to one of Claims 4 to 13, characterized in that the conversion mechanism (7) is a substantially L-shaped angle gear, extending in a plane substantially parallel to the axis of rotation (R) of the main rod (2).
15. Système d'essuyage selon la revendication 14, caractérisé en ce que ledit renvoi d'angle est agencé de sorte qu'une extrémité du L est fixée rigidement au deuxième organe de commande (70), l'autre extrémité du L étant reliée à l'extrémité de la tige principale (2) par l'intermédiaire d'une rotule (26), le renvoi d'angle (7) étant en outre monté sur un pivot (8) de manière à pouvoir pivoter autour d'un axe de pivotement perpendiculaire à l'axe de rotation (R) lorsque le deuxième organe de commande (70) glisse sur le deuxième profil de came (51).Wiper system according to claim 14, characterized in that said angle gear is arranged such that one end of the L is rigidly attached to the second control member (70), the other end of the L being connected at the end of the main rod (2) via a ball joint (26), the angle gear (7) being further mounted on a pivot (8) so as to be pivotable about a pivot axis perpendicular to the axis of rotation (R) when the second control member (70) slides on the second cam profile (51).
16. Système d'essuyage selon la revendication 15, caractérisé en ce que le renvoi d'angle comporte une cavité de réception (76) recevant la rotule (26), ainsi qu'un rainure latérale (77) pour le passage de la tige principale (2).16. A wiper system according to claim 15, characterized in that the angle gear comprises a receiving cavity (76) receiving the ball joint (26), and a lateral groove (77) for the passage of the main stem (2).
17. Système d'essuyage selon la revendication 16, caractérisé en ce que la largeur de la rainure latérale (77) est inférieure à la taille de la rotule (26), et en ce que le volume de la cavité de réception (76) est légèrement supérieur à la taille de la rotule pour autoriser un certain jeu.A wiper system according to claim 16, characterized in that the width of the lateral groove (77) is smaller than the size of the swivel (26), and that the volume of the receiving cavity (76) is slightly larger than the size of the patella to allow some play.
18. Système d'essuyage selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte en outre un moyen de guidage (44, 45) pour guider le mouvement de translation de la tige principale (2) le long de son axe longitudinal (R) ainsi que le mouvement de rotation de cette tige principale (2) autour de son axe longitudinal (R) Wiper system according to one of the preceding claims, characterized in that it further comprises a guide means (44, 45) for guiding the translation movement of the main stem (2) along its length. longitudinal axis (R) as well as the rotational movement of this main stem (2) about its longitudinal axis (R)
PCT/EP2007/064200 2006-12-21 2007-12-19 Wiping system for motor vehicle window WO2008080846A1 (en)

Applications Claiming Priority (2)

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FR0611192 2006-12-21
FR0611192A FR2910413B1 (en) 2006-12-21 2006-12-21 WINDOW SYSTEM FOR AUTOMOTIVE VEHICLE GLASS

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WO2023107343A1 (en) * 2021-12-06 2023-06-15 Tesla, Inc. Windshield wiper systems

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005013178A1 (en) * 2005-03-22 2006-09-28 Obstfelder, Sigrid Windscreen wipers with two superimposed wiping movements, has drive unit in connecting member for imposing independent movement on wiper blade
FR2885101A1 (en) * 2005-04-29 2006-11-03 Valeo Systemes Dessuyage PANTOGRAPH TYPE WIPER WITH VARIABLE ATTACHMENT ANGLE WIPER BRUSH

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005013178A1 (en) * 2005-03-22 2006-09-28 Obstfelder, Sigrid Windscreen wipers with two superimposed wiping movements, has drive unit in connecting member for imposing independent movement on wiper blade
FR2885101A1 (en) * 2005-04-29 2006-11-03 Valeo Systemes Dessuyage PANTOGRAPH TYPE WIPER WITH VARIABLE ATTACHMENT ANGLE WIPER BRUSH

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FR2910413A1 (en) 2008-06-27

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