WO2008099104A2 - Assembly for an electric steering column of an automotive vehicle - Google Patents

Assembly for an electric steering column of an automotive vehicle Download PDF

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Publication number
WO2008099104A2
WO2008099104A2 PCT/FR2008/050043 FR2008050043W WO2008099104A2 WO 2008099104 A2 WO2008099104 A2 WO 2008099104A2 FR 2008050043 W FR2008050043 W FR 2008050043W WO 2008099104 A2 WO2008099104 A2 WO 2008099104A2
Authority
WO
WIPO (PCT)
Prior art keywords
steering
steering wheel
body structure
steering shaft
arrangement
Prior art date
Application number
PCT/FR2008/050043
Other languages
French (fr)
Other versions
WO2008099104A3 (en
Inventor
Olivier Guicherd
Mathieu Meynet
Original Assignee
Renault S.A.S.
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
Priority claimed from FR0752602A external-priority patent/FR2911105B1/en
Priority claimed from FR0700169A external-priority patent/FR2911104A3/en
Application filed by Renault S.A.S. filed Critical Renault S.A.S.
Publication of WO2008099104A2 publication Critical patent/WO2008099104A2/en
Publication of WO2008099104A3 publication Critical patent/WO2008099104A3/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/001—Mechanical components or aspects of steer-by-wire systems, not otherwise provided for in this maingroup
    • B62D5/005—Mechanical components or aspects of steer-by-wire systems, not otherwise provided for in this maingroup means for generating torque on steering wheel or input member, e.g. feedback

Definitions

  • the invention relates to an arrangement for an electric steering column of a motor vehicle.
  • the invention more particularly relates to an arrangement for an electric steering column of a motor vehicle, of the type which comprises a steering wheel, pivotally mounted relative to a body structure element of the motor vehicle, of the type which comprises means for detecting the angular position of the steering wheel intended to control an electric steering mechanism of the vehicle, of the type in which the steering wheel is coupled to a first end of a steering shaft whose second end is coupled to a brake or an electric motor intended to provide a force feedback to a driver handling the steering wheel, and of the type in which elastic return means are interposed between the vehicle body structure element and the steering shaft to return the steering wheel to a corner position no pivot corresponding to a return online said steering wheel.
  • the invention overcomes these disadvantages by replacing the cam and roller elastic return means by a crank and crank mechanism.
  • the invention proposes an arrangement of the type described above, characterized in that the elastic return means comprise a connecting rod and crank mechanism which comprises:
  • the steering shaft comprises an intermediate section forming a crankshaft which comprises a cylindrical crankpin whose axis is eccentric with respect to the axis of said steering shaft to form the eccentric means which is pivotally coupled to the telescopic rod, - the telescopic connecting rod comprises:
  • a first female tubular sleeve one end of which has a first coupling means pivoting to the vehicle body structure element and which comprises a first blind bore
  • a second male tubular sleeve one end of which comprises a second means of coupling
  • an eccentrically pivotable coupling which is slidably received in the first blind bore, and which has a second blind bore, • a compression coil spring which is received in the first and second blind bores
  • the first pivoting coupling means of the first female tubular sleeve to the vehicle body structure element comprises a hook which is received on a conformal cylindrical pin integral with the body structure element
  • the second pivotal coupling means of the second male tubular sleeve with the cylindrical pin of the steering column to the vehicle body structure element comprises a fork which is received on said crankpin, in the position of zero angle of pivoting of the steering wheel, the direction of the telescopic rod passes through the axis of the steering column and the axis of the crank pin of the steering column.
  • the device of the invention comprises a gearbox having an input and a gearbox output, the gearhead input being indexed in rotation with respect to the steering shaft according to the invention. the axis of rotation of the steering shaft and the gearbox output being indexed in rotation with respect to the eccentric means along the axis of rotation of the eccentric means.
  • the gearbox is a gear mechanism which is intended to transform an input speed, in this case the rotational speed of the steering shaft, into an output speed, in this case the speed of rotation of the gearbox. direction exit, in a defined report.
  • This defined ratio of the gearbox is chosen so that the output speed of the gearbox is always lower than the input speed of this gearbox. The ratio between the inlet and the outlet of the gearbox is therefore less than 1.
  • the steering shaft which is connected in rotation with the input of the gearbox can thus cause the crank to rotate and be rotated by the crank which is itself linked to rotation with the reducer output.
  • the ratio of the gearbox is such that the output speed is always reduced with respect to the speed of the input, this implies that when the steering wheel (and thus the steering shaft) makes a turn along the axis of rotation of the steering shaft the crank which is rotated by the outlet of the gearbox then makes less than one turn.
  • the device of the invention when it is equipped with a reducer is adapted to operate over a wide range of rotation of the steering wheel while allowing, throughout the rotation of the steering wheel in a given direction of rotation and in the limit of maximum amplitude of rotation of the steering wheel, a continuous increase of torque steering wheel.
  • the gearbox is adapted so that the rotation of the gearbox input rotates the output of the gearbox and vice versa so that the rotation of the output of the gearbox rotates the input of the gearbox.
  • FIG. 1 is a perspective view of an arrangement according to the invention.
  • FIG. 2 is a schematic view through a plane transverse to the steering shaft illustrating the position of the telescopic rod when the steering wheel occupies its zero angle position of the steering wheel;
  • FIG. 3 is a schematic view through a plane transverse to the steering shaft illustrating the position of the telescopic rod when the flywheel occupies a non-zero angular position;
  • FIG. 4 is a perspective view of an arrangement according to a second embodiment of the invention wherein the eccentric means and the steering shaft are interconnected by a reducer.
  • FIG. 1 shows an arrangement 10 for a motor vehicle electrical steering column 12.
  • the steering column 12 includes a steering wheel
  • the steering wheel 14 is pivotally mounted relative to a body structure element which is covered by a dashboard having an instrument block 16 arranged behind the steering wheel 14.
  • the arrangement 10 further comprises means (not shown) for detecting the angular position of the steering wheel 14 which are intended to control a mechanism (not shown) of electrical steering of the vehicle.
  • the flywheel 14 is coupled to a first end 18 of a steering shaft 20 whose second end 22 is coupled to a brake or an electric motor 24 which is intended to provide a force feedback to a driver handling the steering wheel 14, directly as shown in FIG. 1 or indirectly via a gearbox 1 12 as shown in FIG. 4.
  • elastic return means 26 are interposed between the vehicle body structure element and the steering shaft 20 to return the steering wheel 14 to a position of zero pivot angle, represented in FIG. corresponding to a return on line of said steering wheel 14.
  • the elastic return means 26 comprise a crank and crank mechanism which comprises: an eccentric means 28 integral in rotation with the crank-type steering shaft,
  • the steering shaft 20 comprises an intermediate section 36 forming a crankshaft which comprises a cylindrical crank pin 28 whose axis "A", represented in FIGS. 2 and 3, is eccentric with respect to the "B" axis of said steering shaft 20 to form the eccentric means to which the telescopic rod 30 is pivotally coupled.
  • the telescopic rod 30 comprises a first female tubular sleeve 38, one end 34 of which has a first coupling means 40 pivoting to the vehicle body structure element, and which comprises a first blind bore 42 ,
  • the telescopic rod 30 also comprises a second male tubular sleeve 44, one end 32 of which has a second means 46 for pivoting coupling to the eccentric means 28, which is slidably received in the first blind bore 42 and which has a second blind bore 48
  • the telescopic connecting rod 30 finally comprises a helical compression spring 50 which is received in the first and second blind bores 42, 48.
  • the first pivotal coupling means 40 of the first female tubular sleeve 30 to the vehicle body structure element comprises a hook 40 which is received on a cylindrical pin 52 which is integral with the structure element (not shown). checkout.
  • the first hook 40 is received on a cylindrical pin 52 which is integral with the structure element (not shown). checkout.
  • the first hook 40 is received on a cylindrical pin 52 which is integral with the structure element (not shown). checkout.
  • the second pivotal coupling means 46 of the second male tubular sleeve 44 to the cylindrical pin 28 of the steering column 20 to the vehicle body structure element comprises a fork 46 which is received on said crank pin .
  • the fork 46 is made of a substantially elastic synthetic material so that its arms can be deformed to fit on the crankpin 28.
  • FIGS. 2 and 3 illustrate the positions of means 26 for elastic return as a function of steering of the flywheel 14.
  • the direction "C" of the telescopic rod 30 passes through the axis "B” of the steering column 20 and the axis "A" of the crank pin 28 of the steering column.
  • the invention thus makes it possible to ensure, in a simple and effective manner, the return of a steering wheel 14 from a motor vehicle electrical steering column 12.
  • the invention also makes it possible to provide a force feedback in the event of brake or electric motor failure 24.
  • this causes a rotation of the eccentric means 28 and therefore a variation of the length of the telescopic rod 30 comprising the compression spring 50.
  • the cylinder exerts a force opposite to this displacement, this force having a tendency to reposition the steering shaft 2 in its predetermined angular position.
  • a feature of the embodiment of Figure 5 is that the eccentric means 28 is connected to the steering shaft 20 by a gear 112 having an inlet 112a and an outlet 1 12b.
  • This reducer 112 is intended to allow the use of the device of the invention over a range of rotation greater than the range of rotation allowed by the embodiment of Figure 1. In fact, this reducer is intended to ensure the absolute value of the angular displacement angle at the output of the gearbox is always less than the absolute value of the angular displacement angle of the gearbox input.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Steering Controls (AREA)

Abstract

The invention relates to an assembly (10) for the electric steering column (12) of an automotive vehicle, of the type comprising a steering shaft (20) connected to a steering wheel (14), and of the type in which elastic return means (26) are provided between a structural member of the vehicle bodywork and the steering shaft (20) for returning the steering wheel (14) to a zero-angle position, characterised in that the elastic return means (26) include a connecting-rod and crank mechanism including and eccentric means (28) rotatingly connected to the steering shaft (20), a telescopic connecting rod (30) elastically deformable under compression and having one end (32) pivotally coupled by a pivot to the eccentric means (28) while the other end (34) is pivotally coupled to the structural member of the vehicle bodywork.

Description

"Agencement pour une colonne de direction électrique de véhicule automobile" "Arrangement for an electric steering column of a motor vehicle"
L'invention concerne un agencement pour une colonne de direction électrique de véhicule automobile. L'invention concerne plus particulièrement un agencement pour une colonne de direction électrique de véhicule automobile, du type qui comporte un volant, monté pivotant par rapport à un élément de structure de caisse du véhicule automobile, du type qui comporte des moyens de détection de la position angulaire du volant destinés à commander un mécanisme de direction électrique du véhicule, du type dans lequel le volant est accouplé à une première extrémité d'un arbre de direction dont une seconde extrémité est accouplée à un frein ou à un moteur électrique destiné à fournir un retour d'effort à un conducteur manipulant le volant, et du type dans lequel des moyens de rappel élastique sont interposés entre l'élément de structure de caisse du véhicule et l'arbre de direction pour rappeler le volant vers une position d'angle nul de pivotement correspondant à une remise en ligne dudit volant.The invention relates to an arrangement for an electric steering column of a motor vehicle. The invention more particularly relates to an arrangement for an electric steering column of a motor vehicle, of the type which comprises a steering wheel, pivotally mounted relative to a body structure element of the motor vehicle, of the type which comprises means for detecting the angular position of the steering wheel intended to control an electric steering mechanism of the vehicle, of the type in which the steering wheel is coupled to a first end of a steering shaft whose second end is coupled to a brake or an electric motor intended to provide a force feedback to a driver handling the steering wheel, and of the type in which elastic return means are interposed between the vehicle body structure element and the steering shaft to return the steering wheel to a corner position no pivot corresponding to a return online said steering wheel.
On connaît de nombreux exemples d'agencements de ce type. Les documents EP-A-1.332.941 , JP-A-2004314735 et FR-A-2.827.250 décrivent des agencements dans lesquels des moyens de rappel élastique sont constitués d'une came, solidaire de l'arbre de direction, qui sollicite un galet dont l'axe est rappelé élastiquement sensiblement radialement par rapport à la colonne de direction.Many examples of arrangements of this type are known. The documents EP-A-1,332,941, JP-A-2004314735 and FR-A-2,827,250 describe arrangements in which elastic return means consist of a cam, integral with the steering shaft, which requests a roller whose axis is resiliently biased substantially radially relative to the steering column.
Ces agencements nécessitent un grand nombre de pièces mis en œuvre, et nécessitent un usinage des cames utilisées, ce qui les rend particulièrement onéreux.These arrangements require a large number of parts implemented, and require machining of the cams used, which makes them particularly expensive.
L'invention remédie à ces inconvénients en remplaçant les moyens de rappel élastique à came et galets par un mécanisme bielle et manivelle.The invention overcomes these disadvantages by replacing the cam and roller elastic return means by a crank and crank mechanism.
Dans ce but, l'invention propose un agencement du type décrit précédemment, caractérisé en ce que les moyens de rappel élastique comportent un mécanisme à bielle et manivelle qui comporte :For this purpose, the invention proposes an arrangement of the type described above, characterized in that the elastic return means comprise a connecting rod and crank mechanism which comprises:
- un moyen excentrique solidaire en rotation de l'arbre de direction formant manivelle, - une bielle télescopique, déformable élastiquement en compression, dont une extrémité est accouplée de manière pivotante par un pivot au moyen excentrique et dont l'autre extrémité est accouplée de manière pivotante à l'élément de structure de caisse du véhicule. Selon d'autres caractéristiques de l'invention :an eccentric means integral in rotation with the steering shaft forming a crank, - A telescopic rod, elastically deformable in compression, one end of which is pivotally coupled by a pivot to the eccentric means and whose other end is pivotally coupled to the body structure element of the vehicle. According to other features of the invention:
- l'arbre de direction comporte un tronçon intermédiaire formant vilebrequin qui comporte un maneton cylindrique dont l'axe est excentré par rapport à l'axe dudit arbre de direction pour former le moyen excentrique auquel est accouplé de manière pivotante la bielle télescopique, - la bielle télescopique comporte :- The steering shaft comprises an intermediate section forming a crankshaft which comprises a cylindrical crankpin whose axis is eccentric with respect to the axis of said steering shaft to form the eccentric means which is pivotally coupled to the telescopic rod, - the telescopic connecting rod comprises:
• un premier manchon tubulaire femelle dont une extrémité comporte un premier moyen d'accouplement pivotant à l'élément de structure de caisse du véhicule et qui comporte un premier alésage borgne, • un second manchon tubulaire mâle dont une extrémité comporte un second moyen d'accouplement pivotant au moyen excentrique, qui est reçu de manière coulissante dans le premier alésage borgne, et qui comporte un second alésage borgne, • un ressort hélicoïdal de compression qui est reçu dans les premier et second alésages borgnes,A first female tubular sleeve, one end of which has a first coupling means pivoting to the vehicle body structure element and which comprises a first blind bore, a second male tubular sleeve, one end of which comprises a second means of coupling; an eccentrically pivotable coupling, which is slidably received in the first blind bore, and which has a second blind bore, • a compression coil spring which is received in the first and second blind bores,
- le premier moyen d'accouplement pivotant du premier manchon tubulaire femelle à l'élément de structure de caisse du véhicule comporte un crochet qui est reçu sur un pion cylindrique conforme solidaire de l'élément de structure de caisse,the first pivoting coupling means of the first female tubular sleeve to the vehicle body structure element comprises a hook which is received on a conformal cylindrical pin integral with the body structure element,
- le second moyen d'accouplement pivotant du second manchon tubulaire mâle au maneton cylindrique de la colonne de direction à l'élément de structure de caisse du véhicule comporte une fourche qui est reçue sur ledit maneton, - dans la position d'angle nul de pivotement du volant, la direction de la bielle télescopique passe par l'axe de la colonne de direction et l'axe du maneton de la colonne de direction. On peut également faire en sorte que le dispositif de l'invention comporte un réducteur doté d'une entrée et d'une sortie de réducteur, l'entrée de réducteur étant indexée en rotation vis-à-vis de l'arbre de direction selon l'axe de rotation de l'arbre de direction et la sortie de réducteur étant indexée en rotation vis-à-vis du moyen excentrique selon l'axe de rotation du moyen excentrique.the second pivotal coupling means of the second male tubular sleeve with the cylindrical pin of the steering column to the vehicle body structure element comprises a fork which is received on said crankpin, in the position of zero angle of pivoting of the steering wheel, the direction of the telescopic rod passes through the axis of the steering column and the axis of the crank pin of the steering column. It can also be ensured that the device of the invention comprises a gearbox having an input and a gearbox output, the gearhead input being indexed in rotation with respect to the steering shaft according to the invention. the axis of rotation of the steering shaft and the gearbox output being indexed in rotation with respect to the eccentric means along the axis of rotation of the eccentric means.
Le réducteur est un mécanisme d'engrenages qui est destiné à transformer une vitesse d'entrée, en l'occurrence la vitesse de rotation de l'arbre de direction, en une vitesse de sortie, en l'occurrence la vitesse de rotation de la sortie de direction, dans un rapport défini. Ce rapport défini du réducteur est choisi de manière que la vitesse de sortie de réducteur soit toujours inférieure à la vitesse d'entrée de ce réducteur. Le rapport entre l'entrée et la sortie du réducteur est donc inférieur à 1.The gearbox is a gear mechanism which is intended to transform an input speed, in this case the rotational speed of the steering shaft, into an output speed, in this case the speed of rotation of the gearbox. direction exit, in a defined report. This defined ratio of the gearbox is chosen so that the output speed of the gearbox is always lower than the input speed of this gearbox. The ratio between the inlet and the outlet of the gearbox is therefore less than 1.
Dans ce mode particulier de réalisation de l'invention l'arbre de direction qui est liée en rotation avec l'entrée du réducteur peut donc entraîner la manivelle à rotation et être entraîné à rotation par la manivelle qui est elle-même liée à rotation avec la sortie de réducteur.In this particular embodiment of the invention, the steering shaft which is connected in rotation with the input of the gearbox can thus cause the crank to rotate and be rotated by the crank which is itself linked to rotation with the reducer output.
Etant donné que le rapport du réducteur est tel que la vitesse de sortie est toujours réduite par rapport à la vitesse de l'entrée, cela implique que lorsque le volant (et donc l'arbre de direction) fait un tour selon l'axe de rotation de l'arbre de direction la manivelle qui est entraînée à rotation par la sortie du réducteur fait alors moins d'un tour.Since the ratio of the gearbox is such that the output speed is always reduced with respect to the speed of the input, this implies that when the steering wheel (and thus the steering shaft) makes a turn along the axis of rotation of the steering shaft the crank which is rotated by the outlet of the gearbox then makes less than one turn.
De ce fait le dispositif de l'invention lorsqu'il est équipé d'un réducteur est adapté pour fonctionner sur une large amplitude de rotation de volant tout en permettant, tout au long de la rotation du volant dans un sens donné de rotation et dans la limite d'amplitude maximale de rotation du volant, une augmentation en continu du couple au volant.Therefore, the device of the invention when it is equipped with a reducer is adapted to operate over a wide range of rotation of the steering wheel while allowing, throughout the rotation of the steering wheel in a given direction of rotation and in the limit of maximum amplitude of rotation of the steering wheel, a continuous increase of torque steering wheel.
Le réducteur est adapté pour que la rotation de l'entrée de réducteur entraîne à rotation la sortie du réducteur et inversement pour que la rotation de la sortie du réducteur entraîne à rotation l'entrée du réducteur. D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui suit pour la compréhension de laquelle on se reportera aux dessins annexés dans lesquels :The gearbox is adapted so that the rotation of the gearbox input rotates the output of the gearbox and vice versa so that the rotation of the output of the gearbox rotates the input of the gearbox. Other features and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the appended drawings in which:
- la figure 1 est une vue en perspective d'un agencement selon l'invention ;- Figure 1 is a perspective view of an arrangement according to the invention;
- la figure 2 est une vue schématique par un plan transversal à l'arbre de direction illustrant la position de la bielle télescopique lorsque le volant occupe sa position d'angle nul du volant ;- Figure 2 is a schematic view through a plane transverse to the steering shaft illustrating the position of the telescopic rod when the steering wheel occupies its zero angle position of the steering wheel;
- la figure 3 est une vue schématique par un plan transversal à l'arbre de direction illustrant la position de la bielle télescopique lorsque le volant occupe une position angulaire non nulle ;- Figure 3 is a schematic view through a plane transverse to the steering shaft illustrating the position of the telescopic rod when the flywheel occupies a non-zero angular position;
- la figure 4 est une vue en perspective d'un agencement selon un deuxième mode de réalisation de l'invention selon lequel le moyen excentrique et l'arbre de direction sont reliés entre eux par un réducteur.- Figure 4 is a perspective view of an arrangement according to a second embodiment of the invention wherein the eccentric means and the steering shaft are interconnected by a reducer.
Dans la description qui va suivre, des chiffres de référence identiques désignent des pièces identiques ou ayant des fonctions similaires. On a représenté à la figure 1 un agencement 10 pour une colonne 12 de direction électrique de véhicule automobile. De manière connue, la colonne 12 de direction comporte un volantIn the following description, like reference numerals designate like parts or having similar functions. FIG. 1 shows an arrangement 10 for a motor vehicle electrical steering column 12. In known manner, the steering column 12 includes a steering wheel
14, monté pivotant par rapport à un élément (non représenté) de structure de caisse du véhicule automobile.14, pivotally mounted relative to an element (not shown) of the body structure of the motor vehicle.
Par exemple, le volant 14 est monté pivotant par rapport à un élément de structure de caisse qui est recouvert d'un tableau de bord comportant un bloc d'instruments 16 agencé derrière le volant 14.For example, the steering wheel 14 is pivotally mounted relative to a body structure element which is covered by a dashboard having an instrument block 16 arranged behind the steering wheel 14.
L'agencement 10 comporte par ailleurs des moyens (non représentés) de détection de la position angulaire du volant 14 qui sont destinés à commander un mécanisme (non représenté) de direction électrique du véhicule. De manière connue, le volant 14 est accouplé à une première extrémité 18 d'un arbre 20 de direction dont une seconde extrémité 22 est accouplée à un frein ou à un moteur électrique 24 qui destiné à fournir un retour d'effort à un conducteur manipulant le volant 14, soit directement comme représenté sur la figure 1 soit indirectement via un réducteur 1 12 comme représenté sur la figure 4.The arrangement 10 further comprises means (not shown) for detecting the angular position of the steering wheel 14 which are intended to control a mechanism (not shown) of electrical steering of the vehicle. In known manner, the flywheel 14 is coupled to a first end 18 of a steering shaft 20 whose second end 22 is coupled to a brake or an electric motor 24 which is intended to provide a force feedback to a driver handling the steering wheel 14, directly as shown in FIG. 1 or indirectly via a gearbox 1 12 as shown in FIG. 4.
De manière connue, des moyens 26 de rappel élastique sont interposés entre l'élément de structure de caisse du véhicule et l'arbre 20 de direction pour rappeler le volant 14 vers une position d'angle nul de pivotement, représentée à la figure 1 , correspondant à une remise en ligne dudit volant 14.In a known manner, elastic return means 26 are interposed between the vehicle body structure element and the steering shaft 20 to return the steering wheel 14 to a position of zero pivot angle, represented in FIG. corresponding to a return on line of said steering wheel 14.
Conformément à l'invention, les moyens 26 de rappel élastique comportent un mécanisme à bielle et manivelle qui comporte : - un moyen 28 excentrique solidaire en rotation de à l'arbre de direction formant manivelle,According to the invention, the elastic return means 26 comprise a crank and crank mechanism which comprises: an eccentric means 28 integral in rotation with the crank-type steering shaft,
- une bielle télescopique 30, déformable élastiquement en compression, dont une extrémité 32 est accouplée de manière pivotante par un pivot au moyen excentrique et dont l'autre extrémité 34 est accouplée de manière pivotante à l'élément (non représenté) de structure de caisse du véhicule.- A telescopic rod 30, elastically deformable in compression, one end 32 is pivotally coupled by a pivot to the eccentric means and the other end 34 is pivotally coupled to the element (not shown) of the body structure of the vehicle.
Plus particulièrement, comme l'illustrent la figure 1 , l'arbre 20 de direction comporte un tronçon intermédiaire 36 formant vilebrequin qui comporte un maneton cylindrique 28 dont l'axe "A", représenté aux figures 2 et 3, est excentré par rapport à l'axe "B" dudit arbre 20 de direction pour former le moyen excentrique auquel est accouplé de manière pivotante la bielle télescopique 30.More particularly, as illustrated in FIG. 1, the steering shaft 20 comprises an intermediate section 36 forming a crankshaft which comprises a cylindrical crank pin 28 whose axis "A", represented in FIGS. 2 and 3, is eccentric with respect to the "B" axis of said steering shaft 20 to form the eccentric means to which the telescopic rod 30 is pivotally coupled.
Conformément à l'invention, la bielle télescopique 30 comporte un premier manchon tubulaire femelle 38, dont une extrémité 34 comporte un premier moyen 40 d'accouplement pivotant à l'élément de structure de caisse du véhicule, et qui comporte un premier alésage borgne 42,According to the invention, the telescopic rod 30 comprises a first female tubular sleeve 38, one end 34 of which has a first coupling means 40 pivoting to the vehicle body structure element, and which comprises a first blind bore 42 ,
La bielle télescopique 30 comporte aussi un second manchon tubulaire mâle 44 dont une extrémité 32 comporte un second moyen 46 d'accouplement pivotant au moyen excentrique 28, qui est reçu de manière coulissante dans le premier alésage 42 borgne, et qui comporte un second alésage borgne 48, La bielle télescopique 30 comporte enfin un ressort 50 hélicoïdal de compression qui est reçu dans les premier et second alésages borgnes 42, 48.The telescopic rod 30 also comprises a second male tubular sleeve 44, one end 32 of which has a second means 46 for pivoting coupling to the eccentric means 28, which is slidably received in the first blind bore 42 and which has a second blind bore 48 The telescopic connecting rod 30 finally comprises a helical compression spring 50 which is received in the first and second blind bores 42, 48.
Avantageusement, le premier moyen 40 d'accouplement pivotant du premier manchon tubulaire 30 femelle à l'élément de structure de caisse du véhicule comporte un crochet 40 qui est reçu sur un pion cylindrique 52 conforme solidaire de l'élément (non représenté) de structure de caisse. A titre d'exemple, et de manière non limitative de l'invention, le premier crochetAdvantageously, the first pivotal coupling means 40 of the first female tubular sleeve 30 to the vehicle body structure element comprises a hook 40 which is received on a cylindrical pin 52 which is integral with the structure element (not shown). checkout. By way of example, and in a nonlimiting manner of the invention, the first hook
40 est réalisé en un matériau synthétique sensiblement élastique qui lui permet de se déformer pour s'emboîter sur le pion 52.40 is made of a substantially elastic synthetic material that allows it to deform to fit on the pin 52.
D'une manière analogue, le second moyen 46 d'accouplement pivotant du second manchon 44 tubulaire mâle au maneton 28 cylindrique de la colonne 20 de direction à l'élément de structure de caisse du véhicule comporte une fourche 46 qui est reçue sur ledit maneton. A titre d'exemple, et de manière non limitative de l'invention, la fourche 46 est réalisée en un matériau synthétique sensiblement élastique de manière que ses bras puissent se déformer pour s'emboîter sur le maneton 28.Similarly, the second pivotal coupling means 46 of the second male tubular sleeve 44 to the cylindrical pin 28 of the steering column 20 to the vehicle body structure element comprises a fork 46 which is received on said crank pin . By way of example, and in a nonlimiting manner of the invention, the fork 46 is made of a substantially elastic synthetic material so that its arms can be deformed to fit on the crankpin 28.
Les figures 2 et 3 illustrent les positions de moyens 26 de rappel élastique en fonction du braquage du volant 14. Comme l'illustre la figure 2, dans la position d'angle nul de pivotement du volant 14, la direction "C" de la bielle télescopique 30 passe par l'axe "B" de la colonne 20 de direction et l'axe "A" du maneton 28 de la colonne de direction.FIGS. 2 and 3 illustrate the positions of means 26 for elastic return as a function of steering of the flywheel 14. As illustrated in FIG. 2, in the position of zero angle of rotation of the flywheel 14, the direction "C" of the telescopic rod 30 passes through the axis "B" of the steering column 20 and the axis "A" of the crank pin 28 of the steering column.
Lorsque le volant 14 est pivoté d'un angle " " déterminé, le déplacement du maneton 28 excentré conduit à une compression de la bielle télescopique 30 ce qui comprime le ressort 50 et lui permet d'emmagasiner l'énergie propre à assurer le rappel du maneton 28 dans sa position d'origine dès lors que le volant 14 est relâché.When the steering wheel 14 is pivoted by a certain angle "", the displacement of the eccentric crankpin 28 leads to a compression of the telescopic rod 30 which compresses the spring 50 and allows it to store the energy necessary to ensure the return of the crank pin 28 in its original position when the steering wheel 14 is released.
L'invention permet donc d'assurer de manière simple et efficace le rappel d'un volant 14 d'une la colonne 12 de direction électrique de véhicule automobile.The invention thus makes it possible to ensure, in a simple and effective manner, the return of a steering wheel 14 from a motor vehicle electrical steering column 12.
L'invention permet aussi de fournir un retour d'effort en cas de défaillance du frein ou du moteur électrique 24. Dans chacun des modes de réalisation présentés aux figures 1 et 5 lorsque le volant 5 est pivoté, cela entraîne une rotation du moyen excentrique 28 et par conséquent une variation de la longueur de la bielle télescopique 30 comprenant le ressort de compression 50. Lors du déplacement angulaire de l'arbre de direction 2 au delà de sa position prédéterminée, le vérin exerce une force opposée à ce déplacement, cette force ayant tendance à repositionner l'arbre de direction 2 dans sa position angulaire prédéterminée.The invention also makes it possible to provide a force feedback in the event of brake or electric motor failure 24. In each of the embodiments shown in Figures 1 and 5 when the wheel 5 is pivoted, this causes a rotation of the eccentric means 28 and therefore a variation of the length of the telescopic rod 30 comprising the compression spring 50. When moving angular of the steering shaft 2 beyond its predetermined position, the cylinder exerts a force opposite to this displacement, this force having a tendency to reposition the steering shaft 2 in its predetermined angular position.
Une particularité du mode de réalisation de la figure 5 est que le moyen excentrique 28 est relié à l'arbre de direction 20 par un réducteur 112 doté d'une entrée 112a et d'une sortie 1 12b. Ce réducteur 112 à pour objet de permettre l'utilisation du dispositif de l'invention sur une plage de rotation supérieure à la plage de rotation autorisée par le mode de réalisation de la figure 1. En effet ce réducteur a pour objet de faire en sorte que la valeur absolue de l'angle de déplacement angulaire en sortie de réducteur soit toujours inférieure à la valeur absolue de l'angle de déplacement angulaire de l'entrée de réducteur. A feature of the embodiment of Figure 5 is that the eccentric means 28 is connected to the steering shaft 20 by a gear 112 having an inlet 112a and an outlet 1 12b. This reducer 112 is intended to allow the use of the device of the invention over a range of rotation greater than the range of rotation allowed by the embodiment of Figure 1. In fact, this reducer is intended to ensure the absolute value of the angular displacement angle at the output of the gearbox is always less than the absolute value of the angular displacement angle of the gearbox input.

Claims

REVEN DICATIONS REVEN DICATIONS
1 . Agencement (1 0) pour une colonne (12) de direction électrique de véhicule automobile, du type qui comporte un volant (14), monté pivotant par rapport à un élément de structure de caisse du véhicule automobile, du type qui comporte des moyens de détection de la position angulaire du volant (14) destinés à commander un mécanisme de direction électrique du véhicule, du type dans lequel le volant (14) est accouplé à une première extrémité (18) d'un arbre (20) de direction dont une seconde extrémité (22) est accouplée à un frein ou à un moteur électrique (24) destiné à fournir un retour d'effort à un conducteur manipulant le volant (14), et du type dans lequel des moyens de rappel élastique (26) sont interposés entre l'élément de structure de caisse du véhicule et l'arbre (20) de direction pour rappeler le volant (14) vers une position d'angle nul de pivotement correspondant à une remise en ligne dudit volant (14), caractérisé en ce que les moyens (26) de rappel élastique comportent un mécanisme à bielle et manivelle qui comporte :1. Arrangement (1 0) for a motor vehicle electric steering column (12), of the type comprising a steering wheel (14), pivotally mounted relative to a body structure element of the motor vehicle, of the type which comprises means for detecting the angular position of the steering wheel (14) for controlling an electric steering mechanism of the vehicle, of the type in which the steering wheel (14) is coupled to a first end (18) of a steering shaft (20) of which one second end (22) is coupled to a brake or an electric motor (24) for providing a force return to a driver handling the steering wheel (14), and of the type in which elastic return means (26) are interposed between the vehicle body structure member and the steering shaft (20) for biasing the steering wheel (14) to a position of zero pivot angle corresponding to a re-entry of said steering wheel (14), characterized in that what the means (26) of resilient return comprises a crank and crank mechanism which comprises:
- un moyen (28) excentrique solidaire en rotation de l'arbre (20) de direction formant manivelle,an eccentric means (28) integral in rotation with the crankshaft steering shaft (20),
- une bielle (30) télescopique, déformable élastiquement en compression, dont une extrémité (32) est accouplée de manière pivotante par un pivot au moyen excentrique (28) et dont l'autre extrémité (34) est accouplée de manière pivotante à l'élément de structure de caisse du véhicule.- a telescopic rod (30), elastically deformable in compression, one end (32) is pivotally coupled by a pivot to the eccentric means (28) and the other end (34) is pivotally coupled to the body structure element of the vehicle.
2. Agencement (10) selon la revendication précédente, caractérisé en ce que l'arbre (20) de direction comporte un tronçon intermédiaire (36) formant vilebrequin qui comporte un maneton cylindrique (28) dont l'axe (A) est excentré par rapport à l'axe (B) dudit arbre (20) de direction pour former le moyen excentrique auquel est accouplé de manière pivotante la bielle télescopique (30). 2. An arrangement (10) according to the preceding claim, characterized in that the shaft (20) has a steering section (36) forming a crankshaft which comprises a cylindrical pin (28) whose axis (A) is eccentric by relative to the axis (B) of said steering shaft (20) to form the eccentric means to which the telescopic rod (30) is pivotally coupled.
3. Agencement (10) selon la revendication précédente, caractérisé en ce que la bielle télescopique (30) comporte :3. Arrangement (10) according to the preceding claim, characterized in that the telescopic rod (30) comprises:
- un premier manchon (38) tubulaire femelle dont une extrémité (34) comporte un premier moyen (40) d'accouplement pivotant à l'élément de structure de caisse du véhicule et qui comporte un premier alésage borgne (42),a first female tubular sleeve (38), one end (34) of which has a first coupling means (40) pivoting to the vehicle body structure element and which comprises a first blind bore (42),
- un second manchon (44) tubulaire mâle dont une extrémité (32) comporte un second moyen d'accouplement (46) pivotant au moyen excentrique (28), qui est reçu de manière coulissante dans le premier alésage borgne (42), et qui comporte un second alésage borgne (48),a second male tubular sleeve (44), one end (32) of which comprises a second coupling means (46) pivoting to the eccentric means (28), which is slidably received in the first blind bore (42), and has a second blind bore (48),
- un ressort (50) hélicoïdal de compression qui est reçu dans les premier et second alésages borgnes (42, 48).a helical compression spring (50) which is received in the first and second blind bores (42, 48).
4. Agencement (10) selon la revendication précédente, caractérisé en ce que le premier moyen d'accouplement pivotant du premier manchon (38) tubulaire femelle à l'élément de structure de caisse du véhicule comporte un crochet (40) qui est reçu sur un pion cylindrique (52) conforme solidaire de l'élément de structure de caisse. 4. Arrangement (10) according to the preceding claim, characterized in that the first pivoting coupling means of the first female tubular sleeve (38) to the vehicle body structure element comprises a hook (40) which is received on a cylindrical pin (52) conforms to the body structure element.
5. Agencement ( 1 0) selon la revendication précédente, caractérisé en ce que le second moyen d'accouplement pivotant du second manchon (44) tubu lai re mâle au maneton (28) cyli ndrique de la colon ne (20) de di rection à l'élément de structure de caisse du véhicu le comporte u ne fourche (46) qui est reçue su r ledit maneton (28) .5. Arrangement (1 0) according to the preceding claim, characterized in that the second pivotal coupling means of the second sleeve (44) tubu lai male to the pin (28) cyli ndrique of the colon (20) di rection the vehicle body structure element comprises a fork (46) which is received on said crankpin (28).
6. Agencement ( 1 0) selon l'u ne des revendications précédentes, caractérisé en ce que, dans la position d'angle nu l de pivotement du volant ( 14), la di rection (C) de la bielle (30) télescopique passe par l'axe (B) de la colon ne (20) de di rection et l'axe (A) du maneton (28) de la colonne (20) de di rection .6. Arrangement (1 0) according to one of the preceding claims, characterized in that, in the position of naked angle of pivoting of the steering wheel (14), the direction (C) of the rod (30) telescopic passes through the axis (B) of the colon (20) of di rection and the axis (A) of the crank pin (28) of the column (20) di rection.
7. Agencement (1 0) selon l'u ne des revendications précédentes, caractérisé en ce qu'i l comporte u n réducteu r (1 1 2) doté d'une entrée (1 1 2a) et d'une sortie (1 12b) de réducteur, l'entrée de réducteur (1 12a) est indexée en rotation vis-à-vis de l'arbre de direction (20) selon l'axe de rotation de l'arbre de direction et la sortie de réducteur (1 12b) est indexée en rotation vis-à-vis du moyen excentrique (28) selon l'axe de rotation du moyen excentrique. 7. Arrangement (1 0) according to one of the preceding claims, characterized in that it comprises a reducteu r (1 1 2) with an input (1 1 2a) and an output (1 12b) ) of reducer, the entry of gearbox (1 12a) is indexed in rotation with respect to the steering shaft (20) along the axis of rotation of the steering shaft and the gearbox output (1 12b) is indexed in rotation with respect to the eccentric means (28) along the axis of rotation of the eccentric means.
PCT/FR2008/050043 2007-01-10 2008-01-09 Assembly for an electric steering column of an automotive vehicle WO2008099104A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR0752602A FR2911105B1 (en) 2007-01-10 2007-01-10 ARRANGEMENT FOR AN ELECTRIC POWER STEERING COLUMN OF A MOTOR VEHICLE
FR0700169A FR2911104A3 (en) 2007-01-10 2007-01-10 Steering device for vehicle, has crank rotating along rotational axis of crank by rotation of steering shaft, and telescopic jack, whose jack end is mechanically connected to point of crank, which is away from rotational axis of crank
FR0700169 2007-01-10
FR0752602 2007-01-10

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WO2008099104A2 true WO2008099104A2 (en) 2008-08-21
WO2008099104A3 WO2008099104A3 (en) 2008-11-06

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108290601A (en) * 2015-11-25 2018-07-17 蒂森克虏伯普利斯坦股份公司 Feedback actuators for steer-by-wire steering mechanism

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2887840A1 (en) * 2005-06-29 2007-01-05 Renault Sas PASSIVE STEERING EFFORTS RESETTING DEVICE FOR STEER-BY-WIRE TYPE MOTOR VEHICLE STEERING SYSTEM

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2887840A1 (en) * 2005-06-29 2007-01-05 Renault Sas PASSIVE STEERING EFFORTS RESETTING DEVICE FOR STEER-BY-WIRE TYPE MOTOR VEHICLE STEERING SYSTEM

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108290601A (en) * 2015-11-25 2018-07-17 蒂森克虏伯普利斯坦股份公司 Feedback actuators for steer-by-wire steering mechanism
US10661823B2 (en) 2015-11-25 2020-05-26 Thyssenkrupp Presta Ag Feedback actuator for a steer-by-wire steering mechanism

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