FR2935672A1 - Rear steering suspension arm for rear axle of motor vehicle, has turning actuator driving steering wheel swivel by gear comprising endless screw, where actuator has toothed sector centered on steering wheel swivel - Google Patents

Rear steering suspension arm for rear axle of motor vehicle, has turning actuator driving steering wheel swivel by gear comprising endless screw, where actuator has toothed sector centered on steering wheel swivel Download PDF

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Publication number
FR2935672A1
FR2935672A1 FR0855949A FR0855949A FR2935672A1 FR 2935672 A1 FR2935672 A1 FR 2935672A1 FR 0855949 A FR0855949 A FR 0855949A FR 0855949 A FR0855949 A FR 0855949A FR 2935672 A1 FR2935672 A1 FR 2935672A1
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FR
France
Prior art keywords
steering
pivot
actuator
suspension arm
steering wheel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR0855949A
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French (fr)
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FR2935672B1 (en
Inventor
David Tisserand
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PSA Automobiles SA
Original Assignee
Peugeot Citroen Automobiles SA
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Publication date
Application filed by Peugeot Citroen Automobiles SA filed Critical Peugeot Citroen Automobiles SA
Priority to FR0855949A priority Critical patent/FR2935672B1/en
Publication of FR2935672A1 publication Critical patent/FR2935672A1/en
Application granted granted Critical
Publication of FR2935672B1 publication Critical patent/FR2935672B1/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
    • B62D5/0418—Electric motor acting on road wheel carriers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
    • B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
    • B60G21/051—Trailing arm twist beam axles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G7/00—Pivoted suspension arms; Accessories thereof
    • B60G7/008—Attaching arms to unsprung part of vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D7/00—Steering linkage; Stub axles or their mountings
    • B62D7/06—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins
    • B62D7/14—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering
    • B62D7/15—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering characterised by means varying the ratio between the steering angles of the steered wheels
    • B62D7/1581—Steering linkage; Stub axles or their mountings for individually-pivoted wheels, e.g. on king-pins the pivotal axes being situated in more than one plane transverse to the longitudinal centre line of the vehicle, e.g. all-wheel steering characterised by means varying the ratio between the steering angles of the steered wheels characterised by comprising an electrical interconnecting system between the steering control means of the different axles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D7/00—Steering linkage; Stub axles or their mountings
    • B62D7/18—Steering knuckles; King pins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00—Indexing codes relating to suspension types
    • B60G2200/20—Semi-rigid axle suspensions
    • B60G2200/23—Trailing arms connected by a U-shaped torsion bar
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00—Indexing codes relating to suspension types
    • B60G2200/40—Indexing codes relating to the wheels in the suspensions
    • B60G2200/44—Indexing codes relating to the wheels in the suspensions steerable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/50—Constructional features of wheel supports or knuckles, e.g. steering knuckles, spindle attachments

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

Abstract

The arm (1) has a hub carrier (16) connected by a steering wheel swivel (12), and a turning actuator actuating the steering wheel swivel. The actuator drives the steering wheel swivel by a gear comprising an endless screw. The actuator has a toothed sector centered on the steering wheel swivel. The steering wheel swivel has an upper fixation point (22) remote from a lower fixation point (24). The actuator is provided with a step-by-step electric motor.

Description

BRAS DE SUSPENSION ARRIERE DIRECTEUR POUR VEHICULE AUTOMOBILE REAR SUSPENSION ARM DIRECTOR FOR MOTOR VEHICLE

La présente invention concerne un bras de suspension d'un train arrière pour véhicule automobile, comprenant une commande de direction des roues arrière. Les véhicules automobiles peuvent comporter une commande de braquage des roues arrière pour les rendre directrices, qui agit en coopération avec la commande de braquage des roues avant actionnée par le conducteur. L'angle de braquage des roues arrière est généralement dépendant de la vitesse du véhicule. Pour les vitesses basses, les roues arrière sont orientées dans un sens opposé aux roues avant pour diminuer le rayon de braquage du véhicule et améliorer la maniabilité, par exemple pour les manoeuvres du véhicule. Pour les vitesses plus élevées, les roues arrière sont orientées dans le même sens que les roues avant pour améliorer la stabilité du véhicule, par exemple pour un changement rapide de file de circulation. The present invention relates to a suspension arm of a rear train for a motor vehicle, comprising a steering control of the rear wheels. Motor vehicles may include a rear wheel steering control to make them steered, which acts in cooperation with the driver-controlled front wheel steering control. The steering angle of the rear wheels is usually dependent on the speed of the vehicle. For low speeds, the rear wheels are oriented in a direction opposite to the front wheels to reduce the turning circle of the vehicle and improve the maneuverability, for example for the maneuvers of the vehicle. For higher speeds, the rear wheels are oriented in the same direction as the front wheels to improve the stability of the vehicle, for example for a quick change of lane.

Un dispositif de braquage des roues arrière de ce type décrit notamment dans le document WO-A1-2004/108444, présente un bras de suspension arrière lié par une liaison pivotante à la caisse du véhicule, et oscillant dans un plan longitudinal, la caisse étant supportée par un ressort de suspension s'appuyant sur ce bras. A rear wheel steering device of this type described in particular in WO-A1-2004 / 108444, has a rear suspension arm connected by a pivoting connection to the vehicle body, and oscillating in a longitudinal plane, the body being supported by a suspension spring resting on this arm.

Les deux bras de suspension du train arrière sont reliés entre eux par une traverse flexible maintenant la géométrie de ces bras, tout en assurant par une déformation en torsion, une limitation de l'angle de roulis de la caisse. Un porte-moyeu de roue est relié au bras de suspension par une liaison pivotante permettant un braquage des roues arrière. Le pivot comporte deux articulations supérieure et inférieure fixées à l'arrière du bras de suspension, et alignées suivant un axe sensiblement vertical définissant l'axe de pivotement. Un vérin de commande du braquage de ce porte-moyeu est disposé transversalement, sa tige étant reliée par une rotule à un levier du porte- moyeu disposé perpendiculairement au vérin. Un inconvénient principal de ce dispositif de braquage des roues arrière, est que le système de commande se trouve éloigné du porte-moyeu et de son pivot. L'ensemble est encombrant, lourd et relativement peu rigide. La présente invention a notamment pour but d'éviter ces inconvénients de la technique antérieure, et d'apporter à la réalisation d'un train arrière de véhicule automobile comportant un dispositif de braquage des roues, une solution simple, compacte et économique. Elle propose à cet effet un bras de suspension arrière directeur en particulier pour véhicule automobile, comportant un porte-moyeu relié au bras par un pivot de direction, et un actionneur de braquage de ce pivot, caractérisé en ce que l'actionneur de braquage entraîne le pivot par un engrenage du type roue et vis sans fin, comportant un secteur denté centré sur le pivot de direction. Un avantage principal du bras de suspension directeur selon l'invention, est que la commande de braquage peut être très compact, le secteur denté étant intégré dans le pivot et l'actionneur de braquage étant au plus proche de ce pivot. De plus, le bras de suspension directeur selon l'invention peut comporter une ou plusieurs des caractéristiques suivantes, qui peuvent être combinées entre elles. Avantageusement, le pivot de direction comporte un montage en chape comprenant fixés sur le bras de suspension, un point de fixation supérieur éloigné d'un point de fixation inférieur, ces points de fixation étant reliés par un axe traversant le porte-moyeu. The two suspension arms of the rear axle are interconnected by a flexible crossmember maintaining the geometry of these arms, while ensuring torsional deformation by limiting the roll angle of the body. A wheel hub carrier is connected to the suspension arm by a pivoting connection allowing steering of the rear wheels. The pivot comprises two upper and lower hinges attached to the rear of the suspension arm, and aligned along a substantially vertical axis defining the pivot axis. A cylinder for controlling the steering of this hub carrier is arranged transversely, its rod being connected by a ball joint to a lever of the hub carrier disposed perpendicularly to the jack. A major disadvantage of this rear wheel steering device is that the control system is remote from the hub carrier and its pivot. The set is bulky, heavy and relatively inflexible. The present invention is intended to avoid these disadvantages of the prior art, and to provide the realization of a rear wheel of a motor vehicle having a wheel steering device, a simple, compact and economical solution. It proposes for this purpose a steering rear suspension arm in particular for a motor vehicle, comprising a hub carrier connected to the arm by a steering pivot, and a steering actuator of the pivot, characterized in that the steering actuator causes the pivot by a gear type wheel and worm, having a toothed sector centered on the steering pivot. A main advantage of the steering suspension arm according to the invention is that the steering control can be very compact, the toothed sector being integrated in the pivot and the steering actuator being closer to this pivot. In addition, the steering suspension arm according to the invention may include one or more of the following features, which may be combined with one another. Advantageously, the steering pivot comprises a clevis assembly comprising attached to the suspension arm, an upper attachment point remote from a lower attachment point, these fixing points being connected by an axis passing through the hub carrier.

Avantageusement, le point de fixation supérieur est intégré dans un support formant un caisson fixé sur le dessus du bras de suspension. Advantageously, the upper attachment point is integrated in a support forming a box fixed on the top of the suspension arm.

Le support peut comprendre une tôle pliée pour former un caisson sensiblement parallélépipédique, la face supérieure comportant un perçage formant le point de fixation supérieur. Avantageusement, une vis constituant l'axe du pivot traverse successivement en partant du haut, une partie supérieure du support et un alésage du porte-moyeu, pour venir se visser dans le point de fixation inférieur. La vis peut comprendre successivement une partie cylindrique de guidage se terminant vers le bas par un épaulement, puis une partie filetée d'un diamètre inférieur, l'épaulement venant lors du serrage de la vis en appui sur une face transversale du point de fixation inférieur. Suivant une caractéristique de l'invention, le porte-moyeu comprend une partie cylindrique sensiblement verticale comportant l'alésage du pivot, qui est reliée par deux bras de liaison à une partie distante supportant un moyeu de roue, le secteur denté centré sur l'axe du pivot, étant fixé au porte-moyeu entre les bras de liaison. L'actionneur peut comprendre un moteur électrique et un arbre de sortie formant la vis de l'engrenage, une face du moteur venant se fixer sur une face du caisson constituant le support, la vis rentrant dans ce caisson. The support may comprise a folded sheet to form a substantially parallelepipedic box, the upper face having a bore forming the upper attachment point. Advantageously, a screw constituting the axis of the pivot passes successively from the top, an upper portion of the support and a bore of the hub carrier, to be screwed into the lower fixing point. The screw may comprise successively a cylindrical portion of the guide ending downwards by a shoulder, then a threaded portion of a smaller diameter, the shoulder coming during the tightening of the screw bearing on a transverse face of the lower fixing point . According to a characteristic of the invention, the hub carrier comprises a substantially vertical cylindrical portion comprising the bore of the pivot, which is connected by two connecting arms to a remote portion supporting a wheel hub, the toothed sector centered on the axis of the pivot, being fixed to the hub-carrier between the connecting arms. The actuator may comprise an electric motor and an output shaft forming the gear screw, a motor face being fixed on a face of the box constituting the support, the screw entering this box.

Avantageusement, l'actionneur comprend un moteur électrique pas-à-pas. Suivant une caractéristique de l'invention, le bras de suspension directeur est relié à l'autre bras de suspension du train arrière, par une traverse flexible maintenant la géométrie de ces bras tout en assurant une déformation en torsion. L'invention sera mieux comprise et d'autres caractéristiques et avantages apparaîtront plus clairement à la lecture de la description ci-après, donnée à titre d'exemple en référence aux dessins annexés dans lesquels : - la figure 1 est une vue d'ensemble en perspective d'un bras de suspension équipé, suivant l'invention ; - la figure 2 est une vue de côté de ce bras de suspension équipé ; - la figure 3 est une vue en coupe dans un plan transversal III-III du véhicule et suivant l'axe du pivot, de ce bras de suspension équipé ; - la figure 4 est une vue de détail du bras de suspension ; - la figure 5 est une vue de détail du porte-moyeu ; et - la figure 6 est une vue de détail de l'actionneur. Les figures 1 et 2 représentent un bras de suspension arrière 1 comprenant un tube 2 disposé sensiblement longitudinalement, comportant à l'avant une articulation pivotante 4 disposée sensiblement transversalement, de liaison avec la caisse du véhicule non représentée. Advantageously, the actuator comprises an electric motor step-by-step. According to a feature of the invention, the steering suspension arm is connected to the other suspension arm of the rear axle, by a flexible cross member maintaining the geometry of these arms while ensuring torsional deformation. The invention will be better understood and other features and advantages will appear more clearly on reading the following description, given by way of example with reference to the accompanying drawings, in which: FIG. 1 is an overview in perspective of a suspension arm equipped according to the invention; - Figure 2 is a side view of the suspension arm equipped; - Figure 3 is a sectional view in a transverse plane III-III of the vehicle and along the axis of the pivot, of the suspension arm equipped; - Figure 4 is a detailed view of the suspension arm; - Figure 5 is a detail view of the hub carrier; and - Figure 6 is a detail view of the actuator. Figures 1 and 2 show a rear suspension arm 1 comprising a tube 2 disposed substantially longitudinally, having at the front a pivoting joint 4 disposed substantially transversely connecting the body of the vehicle not shown.

Le bras de suspension 1 est relié à l'autre bras de suspension du train arrière, par une traverse flexible 6 qui maintient la géométrie de ces bras tout en assurant par une déformation en torsion, une limitation de l'angle de roulis de la caisse. Les bras de suspension 1 supportent la caisse du véhicule par un dispositif de suspension non représenté. The suspension arm 1 is connected to the other suspension arm of the rear axle, by a flexible cross member 6 which maintains the geometry of these arms while ensuring by torsional deformation, a limitation of the roll angle of the body . The suspension arms 1 support the vehicle body by a not shown suspension device.

Le bras de suspension 1 comporte à l'arrière et sur le dessus, un support 10 réalisé en tôle pliée, qui remonte vers le haut pour former un point de fixation supérieur 22 se trouvant verticalement éloigné d'un point de fixation inférieur 24 réalisé directement sur le tube 2 du bras. Un porte-moyeu 16 comporte un alésage placé entre les deux points de fixation 22, 24, qui est traversé par un axe sensiblement vertical 40 reliant ces deux points de fixation, pour réaliser une liaison 12 pivotante par rapport au bras de suspension 1. Le porte-moyeu 16 reçoit le moyeu supportant une roue arrière 18, il reçoit aussi un dispositif de freinage 20 de cette roue. The suspension arm 1 comprises at the rear and on the top, a support 10 made of folded sheet metal, which rises upwards to form an upper attachment point 22 located vertically remote from a lower fixing point 24 made directly. on the tube 2 of the arm. A hub carrier 16 has a bore placed between the two attachment points 22, 24, which is traversed by a substantially vertical axis 40 connecting these two attachment points, to make a connection 12 pivoting relative to the suspension arm 1. The Hub carrier 16 receives the hub supporting a rear wheel 18, it also receives a braking device 20 of this wheel.

Le support 10 du pivot 12 reçoit par ailleurs un actionneur 14, qui agit directement sur le porte-moyeu 16 par un engrenage situé entre les fixations supérieur 22 et inférieur 24. Les figures 3 à 6 détaillent les différents composants. Le support 10 soudé au tube 2 du bras de suspension 1, détaillé figure 4, comprend une tôle pliée deux fois dans un plan transversal, pour former un caisson sensiblement parallélépipédique ouvert sur les côtés latéraux. La face supérieure comportant un perçage 26 forme le point de fixation supérieur 22. La figure 3 présente en coupe axiale une vis 40 constituant l'axe du pivot 12, qui traverse successivement en partant du haut, la face supérieure du support 10 par le perçage 26, et un alésage du porte-moyeu 16. La vis 40 vient ensuite se visser dans la fixation inférieure 24 constituée d'un cylindre centré sur cette vis, et soudé sur le tube 2 qu'il traverse de part en part. La vis 40 comprend successivement une partie cylindrique de guidage se terminant vers le bas par un épaulement 42, puis une partie filetée d'un diamètre inférieur. L'épaulement 42 vient lors du serrage de la vis 40 en appui sur la face transversale de la fixation inférieure 24, de manière à garantir une distance entre ces fixations supérieure et inférieure sans déformer le caisson formant le support 10, pour permettre de laisse le porte-moyeu 16 pivoter librement et sans jeu. The support 10 of the pivot 12 also receives an actuator 14, which acts directly on the hub carrier 16 by a gear located between the upper fasteners 22 and lower 24. Figures 3 to 6 detail the various components. The support 10 welded to the tube 2 of the suspension arm 1, detailed in Figure 4, comprises a sheet folded twice in a transverse plane, to form a substantially parallelepiped box open on the lateral sides. The upper face comprising a bore 26 forms the upper attachment point 22. FIG. 3 shows in axial section a screw 40 constituting the axis of the pivot 12, which passes successively from the top, the upper face of the support 10 by drilling 26, and a bore of the hub carrier 16. The screw 40 is then screwed into the lower fastener 24 consisting of a cylinder centered on this screw, and welded to the tube 2 through which it passes through. The screw 40 comprises successively a cylindrical guide portion ending down by a shoulder 42, and a threaded portion of a smaller diameter. The shoulder 42 comes during the tightening of the screw 40 bearing on the transverse face of the lower fastener 24, so as to ensure a distance between these upper and lower fasteners without deforming the box forming the support 10, to allow leash the hub carrier 16 rotate freely and without play.

En variante, on peut interposer entre l'alésage du porte-moyeu 16 et la vis 40, des paliers comprenant par exemple des bagues de glissement ou des roulements, pour assurer un pivotement avec un frottement et une usure réduite. La figure 5 présente le porte-moyeu 16 comprenant une partie cylindrique 64 sensiblement verticale comportant l'alésage du pivot 12, qui est reliée par deux bras supérieur 60 et inférieur 62 fortement nervurés, à une plaque 46 distante, disposée sensiblement perpendiculairement à l'essieu arrière. Cette plaque 46 comporte un alésage de centrage du moyeu de la roue 18, et quatre perçages recevant des vis de fixation de ce moyeu. Alternatively, bearings may be interposed between the bore of the hub carrier 16 and the screw 40, including for example slip rings or bearings, to provide pivoting with reduced friction and wear. FIG. 5 shows the hub carrier 16 comprising a substantially vertical cylindrical portion 64 comprising the bore of the pivot 12, which is connected by two upper arms 60 and 62, which are strongly ribbed, to a remote plate 46 arranged substantially perpendicular to the rear axle. This plate 46 has a centering bore of the hub of the wheel 18, and four holes receiving fastening screws of this hub.

Dans l'espace situé entre la partie cylindrique 64 et la plaque 46 du porte-moyeu 16, et sensiblement à égale distance des bras de liaison 60, 62, un secteur denté 44 centré sur l'axe du pivot 12, est fixé sur cette partie cylindrique. Le secteur denté 44 est tourné vers la plaque 46 recevant le moyeu. In the space between the cylindrical portion 64 and the plate 46 of the hub carrier 16, and substantially equidistant from the link arms 60, 62, a toothed sector 44 centered on the axis of the pivot 12, is fixed on this cylindrical part. The toothed sector 44 is turned towards the plate 46 receiving the hub.

La figure 6 présente l'actionneur 52 comprenant suivant un même axe, un moteur électrique avec un réducteur intégré, et un arbre de sortie formant une vis 54, tourné vers l'arrière. La face arrière 56 de l'ensemble moteur et réducteur constitue un plan comprenant quatre perçages de fixation, qui s'ajustent sur des perçages correspondant de la face avant du caisson formant le support 10, pour assurer la fixation de l'actionneur 52. FIG. 6 shows the actuator 52 comprising, along the same axis, an electric motor with an integrated reduction gear, and an output shaft forming a screw 54, turned towards the rear. The rear face 56 of the motor and gear unit constitutes a plane comprising four fixing holes, which fit on corresponding bores of the front face of the box forming the support 10, in order to fasten the actuator 52.

La vis 54 tournée vers l'arrière de l'actionneur 52, rentre dans le caisson du support 10 par un perçage de ce support, et engrène par un système roue et vis sans fin, avec le secteur denté 44 du porte-moyeu 16. Ce système de réducteur à roue et vis sans fin a pour avantage d'être irréversible, un effort de pivotement du pivot 12 venant de la roue arrière 18, n'étant pas transmis à l'actionneur 52. Un calculateur tenant compte notamment de la demande du conducteur pilotant le volant de direction, et de la vitesse du véhicule, commande simultanément les deux actionneurs 52 de chaque roue arrière 18, pour appliquer une rotation sur les vis 54 et générer un braquage indépendant de chaque roue arrière 18. On peut de cette manière optimiser le braquage de chaque roue arrière 18, ce qui ne peut pas être fait dans le cas d'un actionneur unique de commande simultané du braquage de ces deux roues. Avantageusement, le moteur électrique de l'actionneur 52 est un moteur pas-à-pas qui peut effectuer avec précision des petits angles de rotation. On notera que le caisson du support 10 est un élément simple à mettre en oeuvre, permettant de réaliser facilement un pivot 12 comportant une forte rigidité grâce aux points de fixation supérieur 22 et inférieur 24 espacés, ce qui est important pour assurer une bonne tenue de route du véhicule. Le montage de l'engrenage se trouvant guidé dans le caisson, est aussi rigide. L'ensemble est compact, notamment la transmission de la commande de braquage par engrenage est complètement intégrée dans le caisson du support 10. De plus, le coût de cet ensemble est réduit, le pivot 12 ne nécessitant pas de système de guidage complexe comme dans la cas d'un porte-moyeu monté en porte à faux sur le bras de suspension. The screw 54 turned towards the rear of the actuator 52, enters the box of the support 10 by a drilling of this support, and meshes with a wheel and worm system, with the toothed sector 44 of the hub carrier 16. This wheel and worm gear reducer system has the advantage of being irreversible, a pivoting force of the pivot 12 coming from the rear wheel 18, not being transmitted to the actuator 52. A calculator taking into account in particular the request of the driver controlling the steering wheel, and the speed of the vehicle, simultaneously controls the two actuators 52 of each rear wheel 18, to apply a rotation on the screws 54 and generate an independent turning of each rear wheel 18. It can this way optimize the steering of each rear wheel 18, which can not be done in the case of a single actuator for simultaneous control of the steering of these two wheels. Advantageously, the electric motor of the actuator 52 is a stepper motor that can accurately perform small angles of rotation. It will be noted that the box of the support 10 is a simple element to implement, making it possible to easily achieve a pivot 12 having a high rigidity with the upper fixing points 22 and 24 below spaced, which is important to ensure a good performance of vehicle road. The mounting of the gear being guided in the box is also rigid. The assembly is compact, in particular the transmission of the gear steering control is completely integrated in the box of the support 10. In addition, the cost of this set is reduced, the pivot 12 does not require a complex guidance system as in the case of a hub carrier mounted cantilever on the suspension arm.

Le pivot 12 du bras de suspension selon l'invention, permet en particulier de réaliser facilement un braquage de +1- 5° sur chaque roue arrière 18. The pivot 12 of the suspension arm according to the invention makes it possible in particular to easily achieve a + -5 ° deflection on each rear wheel 18.

Claims (1)

REVENDICATIONS1 û Bras de suspension arrière directeur en particulier pour véhicule automobile, comportant un porte-moyeu (16) relié au bras par un pivot de direction (12), et un actionneur de braquage (52) de ce pivot, caractérisé en ce que l'actionneur de braquage entraîne le pivot par un engrenage du type roue et vis sans fin, comportant un secteur denté (44) centré sur le pivot de direction. 2 û Bras de suspension directeur selon la revendication 1, caractérisé en ce que le pivot de direction (12) comporte un montage en chape comprenant fixés sur le bras de suspension (1), un point de fixation supérieur (22) éloigné d'un point de fixation inférieur (24), ces points de fixation étant reliés par un axe (40) traversant le porte-moyeu (16). 3 û Bras de suspension directeur selon la revendication 2, caractérisé en ce que le point de fixation supérieur (22) est intégré dans un support (10) formant un caisson fixé sur le dessus de ce bras de suspension (1). 4 û Bras de suspension directeur selon la revendication 3, caractérisé en ce que le support (10) comprend une tôle pliée pour former un caisson sensiblement parallélépipédique, la face supérieure comportant un perçage (26) formant le point de fixation supérieur (22). 5 û Bras de suspension directeur selon la revendication 3 ou 4, caractérisé en ce qu'une vis (40) constituant l'axe du pivot (12), traverse successivement en partant du haut, une partie supérieure du support (10) et un alésage du porte-moyeu (16), pour venir se visser dans le point de fixation inférieur (24). 6 û Bras de suspension directeur selon la revendication 5, caractérisé en ce que la vis (40) comprend successivement une partie cylindrique de guidage se terminant vers le bas par un épaulement (42), puis une partie filetée d'un diamètre inférieur, l'épaulement venant lors du serrage de la vis en appui sur une face transversale du point de fixation inférieur (24).7 û Bras de suspension directeur selon l'une quelconque des revendications précédentes, caractérisé en ce que le porte-moyeu (16) comprend une partie cylindrique (64) sensiblement verticale comportant l'alésage du pivot (12), qui est reliée par deux bras de liaison (60, 62) à une partie distante (46) supportant un moyeu de roue (18), le secteur denté (44) centré sur l'axe du pivot, étant fixé au porte-moyeu entre les bras de liaison. 8 û Bras de suspension directeur selon l'une quelconque des revendications précédentes, caractérisé en ce que l'actionneur (52) comprend un moteur électrique et un arbre de sortie formant la vis (54) de l'engrenage, une face (56) du moteur venant se fixer sur une face du caisson constituant le support (10), la vis rentrant dans ce caisson. 9 û Bras de suspension directeur selon l'une quelconque des revendications précédentes, caractérisé en ce que l'actionneur (52) comprend un moteur électrique pas-à-pas. 10 û Bras de suspension directeur selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est relié à l'autre bras de suspension du train arrière, par une traverse flexible (6) maintenant la géométrie de ces bras (1) tout en assurant une déformation en torsion. CLAIMS1 - Steering rear suspension arm, in particular for a motor vehicle, comprising a hub carrier (16) connected to the arm by a steering pivot (12), and a steering actuator (52) thereof, characterized in that The steering actuator drives the pivot by a wheel and worm type gear having a toothed sector (44) centered on the steering pivot. 2 - Steering arm according to claim 1, characterized in that the steering pivot (12) comprises a clevis mounting comprising attached to the suspension arm (1), an upper attachment point (22) remote from a lower fixing point (24), these fixing points being connected by an axis (40) passing through the hub carrier (16). 3 - Steering arm according to claim 2, characterized in that the upper attachment point (22) is integrated in a support (10) forming a box fixed on the top of the suspension arm (1). 4 - Steering arm according to claim 3, characterized in that the support (10) comprises a folded sheet to form a substantially parallelepiped box, the upper face having a bore (26) forming the upper attachment point (22). 5 - Steering arm according to claim 3 or 4, characterized in that a screw (40) constituting the axis of the pivot (12), passes successively from the top, an upper portion of the support (10) and a bore of the hub carrier (16), to be screwed into the lower fixing point (24). 6 - Steering arm according to claim 5, characterized in that the screw (40) comprises successively a cylindrical portion of the guide ending down by a shoulder (42), and a threaded portion of a smaller diameter, shoulder corresponding to the tightening of the screw bearing on a transverse face of the lower fixing point (24) .7 - Steering suspension arm according to any one of the preceding claims, characterized in that the hub-carrier (16) comprises a substantially vertical cylindrical portion (64) having the bore of the pivot (12), which is connected by two link arms (60, 62) to a remote portion (46) supporting a wheel hub (18), the sector toothed (44) centered on the axis of the pivot, being fixed to the hub-carrier between the connecting arms. 8 - Steering arm according to any one of the preceding claims, characterized in that the actuator (52) comprises an electric motor and an output shaft forming the screw (54) of the gear, a face (56) the motor being fixed on a face of the box constituting the support (10), the screw entering this box. 9 - Steering arm according to any one of the preceding claims, characterized in that the actuator (52) comprises an electric motor step-by-step. Steering suspension arm according to one of the preceding claims, characterized in that it is connected to the other suspension arm of the rear axle by a flexible cross member (6) maintaining the geometry of these arms (1). while ensuring torsional deformation.
FR0855949A 2008-09-05 2008-09-05 REAR SUSPENSION ARM DIRECTOR FOR MOTOR VEHICLE Expired - Fee Related FR2935672B1 (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010061154A1 (en) * 2010-12-10 2012-06-14 Gmf Umformtechnik Gmbh Twist-beam axle for motor vehicle, has cross beam and longitudinal beams for wheel carrier for fastening at vehicle wheel
DE102012022386A1 (en) 2012-11-15 2014-05-15 Audi Ag Wheel suspension i.e. guided torsion beam trailing arm axle, for use in motor vehicle, has rotation actuator and coupling arranged at drag axis in flushed manner and firmly mounted at component, bearing in connection with rotation actuator
DE102012022891A1 (en) * 2012-11-23 2014-05-28 Audi Ag Steered beam axle for motor car, has translational actuators respectively supported at trailing arm and wheel carrier over first and second bearing points spaced apart from each other along vehicle longitudinal direction
WO2015144482A1 (en) * 2014-03-25 2015-10-01 Thyssenkrupp Presta Ag Steering device
EP3299258A1 (en) * 2016-09-23 2018-03-28 Dana Heavy Vehicle Systems Group, LLC Steer axle with integrated directional control
CN110481632A (en) * 2019-07-06 2019-11-22 清华大学 A kind of line traffic control independent steering actuating mechanism based on polyphase machine driving
CN111923999A (en) * 2020-08-17 2020-11-13 上海量动智能科技有限公司 Four-wheel-drive electric vehicle capable of automatically steering in situ
WO2022089834A1 (en) * 2020-10-30 2022-05-05 Robert Bosch Gmbh Individual wheel actuator for a motor vehicle
WO2022122067A1 (en) * 2020-12-11 2022-06-16 Schaeffler Technologies AG & Co. KG Wheel module

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* Cited by examiner, † Cited by third party
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CN111559425A (en) * 2020-04-26 2020-08-21 东风汽车集团有限公司 McPherson suspension structure capable of steering in all directions based on hub motor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05178231A (en) * 1991-12-28 1993-07-20 Mazda Motor Corp Rear wheel steering device for vehicle
WO2004108444A1 (en) * 2003-05-30 2004-12-16 Renault S.A.S. Non-rigid rear axle comprising actuators
FR2896471A3 (en) * 2006-01-24 2007-07-27 Renault Sas Vehicle e.g. four-wheel steering vehicle, has actuator associated to each of steering wheels which are not mechanically connected to flywheel, and arm rotatively mounted on actuator, where rotational axis of arm on actuator is vertical

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05178231A (en) * 1991-12-28 1993-07-20 Mazda Motor Corp Rear wheel steering device for vehicle
WO2004108444A1 (en) * 2003-05-30 2004-12-16 Renault S.A.S. Non-rigid rear axle comprising actuators
FR2896471A3 (en) * 2006-01-24 2007-07-27 Renault Sas Vehicle e.g. four-wheel steering vehicle, has actuator associated to each of steering wheels which are not mechanically connected to flywheel, and arm rotatively mounted on actuator, where rotational axis of arm on actuator is vertical

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010061154A1 (en) * 2010-12-10 2012-06-14 Gmf Umformtechnik Gmbh Twist-beam axle for motor vehicle, has cross beam and longitudinal beams for wheel carrier for fastening at vehicle wheel
DE102010061154B4 (en) * 2010-12-10 2015-01-08 Gmf Umformtechnik Gmbh Active torsion beam axle
DE102012022386A1 (en) 2012-11-15 2014-05-15 Audi Ag Wheel suspension i.e. guided torsion beam trailing arm axle, for use in motor vehicle, has rotation actuator and coupling arranged at drag axis in flushed manner and firmly mounted at component, bearing in connection with rotation actuator
DE102012022891A1 (en) * 2012-11-23 2014-05-28 Audi Ag Steered beam axle for motor car, has translational actuators respectively supported at trailing arm and wheel carrier over first and second bearing points spaced apart from each other along vehicle longitudinal direction
WO2015144482A1 (en) * 2014-03-25 2015-10-01 Thyssenkrupp Presta Ag Steering device
EP3299258A1 (en) * 2016-09-23 2018-03-28 Dana Heavy Vehicle Systems Group, LLC Steer axle with integrated directional control
US10494015B2 (en) 2016-09-23 2019-12-03 Dana Heavy Vehicle Systems Group, Llc Steer axle with integrated directional control
US10843723B2 (en) 2016-09-23 2020-11-24 Dana Heavy Vehicle Systems Group, Llc Steer axle with integrated directional control
CN110481632A (en) * 2019-07-06 2019-11-22 清华大学 A kind of line traffic control independent steering actuating mechanism based on polyphase machine driving
CN111923999A (en) * 2020-08-17 2020-11-13 上海量动智能科技有限公司 Four-wheel-drive electric vehicle capable of automatically steering in situ
WO2022089834A1 (en) * 2020-10-30 2022-05-05 Robert Bosch Gmbh Individual wheel actuator for a motor vehicle
WO2022122067A1 (en) * 2020-12-11 2022-06-16 Schaeffler Technologies AG & Co. KG Wheel module

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