EP0203951A1 - Suspension system applicable to the wheels of a motor cycle or any vehicle of the same technique - Google Patents

Suspension system applicable to the wheels of a motor cycle or any vehicle of the same technique

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Publication number
EP0203951A1
EP0203951A1 EP19850905835 EP85905835A EP0203951A1 EP 0203951 A1 EP0203951 A1 EP 0203951A1 EP 19850905835 EP19850905835 EP 19850905835 EP 85905835 A EP85905835 A EP 85905835A EP 0203951 A1 EP0203951 A1 EP 0203951A1
Authority
EP
European Patent Office
Prior art keywords
kinematic chain
wheel
elements
suspension
suspension according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19850905835
Other languages
German (de)
French (fr)
Inventor
Jean-Marie Flamme
André Leroy
Pierre Doncque
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0203951A1 publication Critical patent/EP0203951A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K25/00—Axle suspensions
    • B62K25/04—Axle suspensions for mounting axles resiliently on cycle frame or fork
    • B62K25/12—Axle suspensions for mounting axles resiliently on cycle frame or fork with rocking arm pivoted on each fork leg
    • B62K25/14—Axle suspensions for mounting axles resiliently on cycle frame or fork with rocking arm pivoted on each fork leg with single arm on each fork leg
    • B62K25/16—Axle suspensions for mounting axles resiliently on cycle frame or fork with rocking arm pivoted on each fork leg with single arm on each fork leg for front wheel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K25/00—Axle suspensions
    • B62K25/04—Axle suspensions for mounting axles resiliently on cycle frame or fork
    • B62K25/28—Axle suspensions for mounting axles resiliently on cycle frame or fork with pivoted chain-stay
    • B62K25/286—Axle suspensions for mounting axles resiliently on cycle frame or fork with pivoted chain-stay the shock absorber being connected to the chain-stay via a linkage mechanism

Definitions

  • the object of the invention is a suspension applicable to the wheels of a motorcycle or a vehicle of the same technique.
  • the invention relates more precisely to the guidance subsystem which is associated with a separate spring-damper subsystem of known type to constitute either a front suspension or a rear suspension.
  • known guidance systems use one of the following solutions: the articulated quadrilateral, the swinging arm or the telescopic fork.
  • the articulated quadrilateral is found in several organizations which are distinguished by the low or high part of the quadrilateral, by the suspended or unsprung character of the steering pivot, associated or integrated with one of the elements of the quadri 1 atère.
  • the swingarm can be hinged to the pivot to push or pull the wheel.
  • the telescopic fork exclusively uses cylindrical guides, two in number, acting in parallel, so as to materialize a prismatic connection with a certain degree of hyperstaticity.
  • the quadrilateral systems in the low position and the unsprung pivot are handicapped by the difficulty of reconciling the necessary steering angle and the possible inclination of the motorcycle when cornering with the limited transverse size; moreover, the distribution of the masses of the wheel-pivot assembly is not ideal for the majority of the current phases of evolution.
  • the overall stiffness of the guide mechanism is insufficient and there is also an incompatibility between the search for improvement of the guide qualities and an ideal weight distribution.
  • fluctuations in the braking torque exploit the significant elasticity of the guide mechanism and cause significant variations in the bearing force which can lead, in extreme cases, to dripping and falling ⁇ ?. u pi 1 cte.
  • the known guidance systems call on the following solutions: "sliding suspension", oscillating arm and, exceptionally, articulated quadrilateral. Neither of these solutions allows the longitudinal vibrations of the wheel axis to be adjusted.
  • the conventional swing arm has the drawback of being hardly compatible with a power transmission by shaft.
  • the suspension object of the invention comprises a guidance subsystem constituting with a suspended element a closed kinematic chain, theoretically planar, with six elements and seven rotoid connections.
  • This chain is organized so that the suspended element and the element carrying the wheel materialize "binary" elements (that is to say comprising only two links) of the closed kinematic chain, on each of which is articulated a binary element and a "ternary” element (ie comprising three bonds) of the same kinematic chain.
  • the suspended element, the element carrying the wheel and two intermediate elements of the closed kinematic chain constitute an open kinematic chain comprising only rotoid connections as perfect as ours.
  • the suspension thus designed applies to a front wheel or to a rear wheel, it is characterized by greater freedom of design than any other known suspension: it allows first of all to choose, with a certain freedom, the trajectory of the axis of the wheel with respect to the suspended element with respect to which it is guided, and this while respecting a favorable mass distribution; this design freedom above all makes it possible to obtain, without having to use any additional element, good anti-diving and anti-rearing characteristics.
  • this suspension system guides the element carrying the wheel and the brake calipers with respect to the steering pivot which, integral with the chassis, constitutes the suspended element.
  • the two intermediate elements of the open kinematic chain corresponding to the most common embodiment mentioned above are ternary elements, so as to reduce the importance of the unsprung masses.
  • the binary elements of the closed kinematic chain are symmetrically doubled so as to act in parallel; such an arrangement makes it possible to accommodate between the doubled elements the wheel on the one hand, and, on the other hand, the spring-shock absorber subsystem then consisting of a single spring and a single coaxial shock absorber so as to facilitate settings.
  • this suspension system guides, relative to the chassis, the element carrying the wheel, the brake caliper and the drive pinion of the bevel gear, the final member of the power transmission to the wheel, when this transmission is ensured by a tree.
  • the two intermediate elements of the open kinematic chain are one binary, the other ternary, so as to facilitate the installation of the guidance subsystem.
  • this suspension is the only one which naturally adapts to a shaft transmission while fully preserving horizontal and vertical filtering capacities.
  • Figures 1, 2 and 3 of plates 1/2, 2/2 show by way of nonlimiting examples two suspensions in accordance with
  • Figure 1 of plate 1/2 shows, in isometric view, a front suspension.
  • Figures 2 and 3 of the board 2/2 respectively show an elevational view and a plan view, with partial sections, of a rear suspension.
  • the front wheel 1 and the brake calipers such as 2 are carried by the fork 3 which is articulated in a on the rocker arm 4 which constitutes a ternary element articulated moreover in b on the rocker 5 and in c 'and c "on connecting rods such as 6 themselves articulated in g 'and g "on the steering pivot 8
  • the rocker 5, the second ternary element, is articulated at d on the pivot 8 and at e 'and e "on two connecting rods such as 7, themselves articulated at f and f" (f "not shown) on the fork 3.
  • the combined shock absorber 9 is articulated, on the one hand, on the pivot 8 and on the other hand, on the rocker arm 4.
  • the six theoretical elements of the closed kinematic chain are: the fork 3, the rocker arm 4, the rocker 5, the connecting rod 6 and its counterpart, the connecting rod 7 and its counterpart, as well as the steering pivot 8.
  • the four elements of the open kinematic chain are the fork 3, the rocker arm 4, the rocker 5 and the steering pivot 8.
  • the rotoid bonds as perfect as possible are the bonds a, b and d; the four imperfect desired connections c ', c ", e', e", f ', f "and ⁇ ', g" are for two of them
  • the rear wheel 10, the brake caliper 11, and the drive pinion (not visible) are carried by the casing 12, which is articulated in h on the connecting rod 13, itself articulated in i on the balance 14 , first ternary element, articulated, on the one hand, at j on the chassis 15 (suspended element) and, on the other hand, at k on the rocker arm 16, second ternary element, itself articulated, on the one hand, at 1 on the casing 12, and, on the other hand, at m on the connecting rod 17 also articulated at n on the chassis 15.
  • the spring-damper combination 18 is articulated on the one hand at p on the casing 12 and at q on the chassis 15.
  • the six elements of the closed kinematic chain are the casing 12, the connecting rod 13, the balance 14, the chassis 15, the rocker arm 16, and the connecting rod 17.
  • the four elements of the open kinematic chain are the casing 12, the connecting rod 13, the balance 14 and the chassis 15;
  • the rotoid bonds as perfect as possible are the h, i and j bonds; the other four connections k, 1, m, n desired imperfect are for two of them k and n cylindrical guides with needles and for the other two 1 and m silentblocks on anti-friction rings.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Axle Suspensions And Sidecars For Cycles (AREA)

Abstract

L'invention est caractérisée en ce que le système de guidage constitue avec l'élément suspendu (8) une chaîne cinématique fermée théoriquement plane à six éléments (3 à 8) et sept liaisons rotoïdes (a, b, c, d, e, f et g) laquelle chaîne est organisée de manière telle que l'élément suspendu (8) et l'élément (3) portant la roue (1) matérialisent des éléments binaires de la chaîne cinématique sur chacun desquels s'articulent un élément binaire (6, 7) et un élément ternaire (4, 5). Application à l'industrie des véhicules à deux roues.The invention is characterized in that the guidance system constitutes with the suspended element (8) a theoretically closed closed kinematic chain with six elements (3 to 8) and seven rotoid connections (a, b, c, d, e, f and g) which chain is organized in such a way that the suspended element (8) and the element (3) carrying the wheel (1) materialize binary elements of the kinematic chain on each of which a binary element is articulated ( 6, 7) and a ternary element (4, 5). Application to the two-wheeled vehicle industry.

Description

SUSPENSION APPLICABLE AUX ROUES D'UNE MOTOCYCLETTE OU D'UN VEHICULE DE MEME TECHNIQUESUSPENSION APPLICABLE TO THE WHEELS OF A MOTORCYCLE OR VEHICLE OF THE SAME TECHNIQUE
L'objet de l 'invention est une suspension applicable aux roues d'une motocyclette ou d'un véhicule de même technique. L'invention porte plus précisément sur le sous-système de guidage qui s'associe à un sous-système séparé ressort-amortisseur de type connu pour constituer soit une suspension avant, soit une suspension arrière.The object of the invention is a suspension applicable to the wheels of a motorcycle or a vehicle of the same technique. The invention relates more precisely to the guidance subsystem which is associated with a separate spring-damper subsystem of known type to constitute either a front suspension or a rear suspension.
Appliqués à la suspension de la roue avant d'une motocyclette, les systèmes de guidage connus retiennent l'une des solutions ci-après : le quadrilatère articulé, le bras oscillant ou la fourche télescopique.Applied to the suspension of the front wheel of a motorcycle, known guidance systems use one of the following solutions: the articulated quadrilateral, the swinging arm or the telescopic fork.
Le quadrilatère articulé se retrouve dans plusieurs organisations qui se distinguent par la partie basse ou haute du quadrilatère, par le caractère suspendu ou non suspendu du pivot de direction, associé ou intégré à l'un des éléments du quadri 1 atère.The articulated quadrilateral is found in several organizations which are distinguished by the low or high part of the quadrilateral, by the suspended or unsprung character of the steering pivot, associated or integrated with one of the elements of the quadri 1 atère.
Le bras oscillant peut être articulé au pivot de manière à pousser ou à tirer la roue. Contrairement à ces solutions, la fourche télescopique fait exclusivement appel à des guidages cylindriques, au nombre de deux, agissant en parallèle, de manière à matérialiser une liaison prismatique avec un certain degré d ' hyperstaticité.The swingarm can be hinged to the pivot to push or pull the wheel. Unlike these solutions, the telescopic fork exclusively uses cylindrical guides, two in number, acting in parallel, so as to materialize a prismatic connection with a certain degree of hyperstaticity.
Toutes les solutions actuellement utilisées ont en commun de ne pouvoir maîtriser les flexibilités verticale, longitudinale ou transversale. En outre, lorsque les suspensions ainsi conçues ne sont pas munies d'un système additionnel d ' anti-plongée, elles ne concilient jamais de bonnes caractéristiques de guidage et d* anti-plongée. En ce qui concerne les systèmes à quadrilatère articulé, il y a lieu de remarquer que les systèmes dont le quadrilatère est en position haute présentent par une cinématique de guidage non satisfaisante et incompatible avec la cinématique d' anti-plongée souhaitable. De même, les solutions utilisant un pivot non suspendu sont le siège de frottements gênants pour la sensibilité de la direction à basse vitesse. En outre, il faut remarquer que les systèmes à quadrilatère en position basse et pivot suspendu nécessitent le doublement de la plupart des éléments de guidage, et compte tenu de la limitation de leur encombrement transversal, leur mode de travail implique un mauvais rapport masse/raideur globales.All the solutions currently used have in common the fact that they cannot control vertical, longitudinal or transverse flexibilities. In addition, when the suspensions thus designed are not provided with an additional anti-diving system, they never combine good guiding and anti-diving characteristics. With regard to articulated quadrilateral systems, it should be noted that systems whose quadrilateral is in the high position have unsatisfactory guide kinematics and are incompatible with the desirable anti-dive kinematics. Likewise, solutions using an unsprung pivot are the seat of annoying friction for the sensitivity of the steering at low speed. In addition, it should be noted that the quadrilateral systems in the low position and suspended pivot require the doubling of most of the guide elements, and taking into account the limitation of their transverse dimensions, their working mode implies a poor mass / stiffness ratio. global.
Enfin, les systèmes à quadrilatère en position basse et pivot non suspendu sont handicapés par la difficulté de concilier l'angle de braquage nécessaire et l'inclinaison possible de la moto en virage avec l 'encombrement transversal limité ; de plus, la répartition des masses de l 'ensemble roue-pivot n'est pas idéale pour la majorité des phases courantes d'évolution.Finally, the quadrilateral systems in the low position and the unsprung pivot are handicapped by the difficulty of reconciling the necessary steering angle and the possible inclination of the motorcycle when cornering with the limited transverse size; moreover, the distribution of the masses of the wheel-pivot assembly is not ideal for the majority of the current phases of evolution.
En ce qui concerne les systèmes â bras oscillant et â roue tirée, la cinématique de guidage est mauvaise si le bras oscillant fait avec l 'horizontale un angle trop important et la diminution de cet angle complique la conception du châssis qui acquiert difficilement la raideur souhaitable à l'endroit où s'articule le bras oscillant.In the case of swing arm and trailing wheel systems, the guide kinematics are poor if the swing arm makes the angle too large and the reduction of this angle complicates the design of the chassis, which hardly acquires the desired stiffness. where the swingarm is articulated.
En outre, le recours à un système additionnel d' anti -plongée est indispensable.In addition, the use of an additional anti-dive system is essential.
Par contre, les systèmes à bras oscillant et à roue poussée présentent trop d ' anti -plongée naturelle en position de détente.On the other hand, the swing arm and thrust wheel systems have too much natural anti-diving in the relaxed position.
Ces systèmes ont également l'inconvénient de présenter une raideur globale du système de guidage insuffisante, couplée à une mauvaise répartition des masses.These systems also have the disadvantage of having an insufficient overall stiffness of the guide system, coupled with poor distribution of the masses.
Pour ce qui est des fourches télescopiques, il y a lieu de noter que ces systèmes présentent des frottements excessifs, dus au guidage prismatique situé le plus souvent trop loin de l'action du sol sur la roue.With regard to telescopic forks, it should be noted that these systems exhibit excessive friction, due to the prismatic guide located most often too far from the action of the ground on the wheel.
De plus, la raideur globale du mécanisme de guidage est insuffisante et il y a également incompatibilité entre la recherche de l 'amélioration des qualités de guidage et une répartition idéale des masses. En outre, les fluctuations du couple de freinage exploitent l 'élasticité importante du mécanisme de guidage et provoquent des variations importantes de la force d'appui pouvant conduire, dans les cas extrêmes, au driblage et à la chute <?. u pi 1 cte . Appliqués à la suspension de la roue arriére d'une motocyclette, les systèmes de guidage connus font appel aux solutions ci-après : "suspension coulissante", bras oscillant et exceptionnellement quadrilatère articulé. Aucune de ces solutions ne permet le fitrage des vibrations longitudinales de l 'axe de la roue.In addition, the overall stiffness of the guide mechanism is insufficient and there is also an incompatibility between the search for improvement of the guide qualities and an ideal weight distribution. In addition, fluctuations in the braking torque exploit the significant elasticity of the guide mechanism and cause significant variations in the bearing force which can lead, in extreme cases, to dripping and falling <?. u pi 1 cte. Applied to the suspension of the rear wheel of a motorcycle, the known guidance systems call on the following solutions: "sliding suspension", oscillating arm and, exceptionally, articulated quadrilateral. Neither of these solutions allows the longitudinal vibrations of the wheel axis to be adjusted.
Les suspensions coulissantes ont disparu en raison des conséquences des jeux inévitables pris par les organes de guidage cylindrique et des effets des frottements. Le quadrilatère articulié n'a pu faire la preuve d'aucun avantage sensible par rapport au bras oscillant de réalisation plus simple.The sliding suspensions have disappeared due to the consequences of the inevitable clearances taken by the cylindrical guide members and the effects of friction. The articulated quadrilateral could not demonstrate any appreciable advantage compared to the swingarm of simpler realization.
Le bras oscillant classique présente l'inconvénient d'être difficilement compatible avec une transmission de puissance par arbre.The conventional swing arm has the drawback of being hardly compatible with a power transmission by shaft.
La suspension objet de l'invention comporte un sous-système de guidage constituant avec un élément suspendu une chaîne cinématique fermée, théoriquement plane, à six éléments et sept liaisons rotoïdes. Cette chaîne est organisée de manière à ce que l'élément suspendu et l'élément portant la roue matérialisent des éléments "binaires" (c'est à dire ne comportant que deux liaisons) de la chaîne cinématique fermée, sur chacun desquels s'articule un élément binaire et un élément "ternaire" (c'est à dire comportant trois liaisons) de la même chaîne cinématique.The suspension object of the invention comprises a guidance subsystem constituting with a suspended element a closed kinematic chain, theoretically planar, with six elements and seven rotoid connections. This chain is organized so that the suspended element and the element carrying the wheel materialize "binary" elements (that is to say comprising only two links) of the closed kinematic chain, on each of which is articulated a binary element and a "ternary" element (ie comprising three bonds) of the same kinematic chain.
Dans la réalisation la, plus courante de cette suspension, quatre des sept liaisons rotoïdes au plus sont voulues mparfa tes par rapport à la liaison rotoîde théorique (c'est à dire réalisées notamment par des articulations élastiques et amorties -"si lentblocs"- pour conférer à la suspension une aptitude au filtrage de vibrations bidirectionnelles et/ou réalisées par des guidages assimilables à des liaisons sphëriques ou cylindriques pour éliminer les hyperstaticitës dues aux imperfections de réalisation). Dans cette réalisation, l 'élément suspendu, l 'élément portant la roue et deux éléments intermédiai es de la chaîne cinématique fermée constituent une chaîne cinématique ouverte ne comportant que des liaisons rotoïdes aussi parfaites que nos si bl e . Que la suspension ainsi conçue s'applique à une roue avant ou à une roue arrière, elle se caractérise par une plus grande liberté de conception que toute autre suspension connue : elle permet d'abord de choisir, avec une certaine liberté, la trajectoire de l'axe de la roue par rapport- à l'élément suspendu par rapport auquel elle est guidée, et ce en respectant une répartition de masse favorable ; cette liberté de conception permet surtout d'obtenir, sans recourir à aucun élément supplémentaire, de bonnes caractéristiques d' anti-plongée et d*anti-cabrage.In the most common embodiment of this suspension, four of the seven rotoid connections at most are desired to be mparfa tes with respect to the theoretical rotoid connection (that is to say made in particular by elastic and damped joints - "if slowblocks" - for give the suspension an ability to filter bidirectional vibrations and / or carried out by guides similar to spherical or cylindrical connections to eliminate hyperstaticities due to production imperfections). In this embodiment, the suspended element, the element carrying the wheel and two intermediate elements of the closed kinematic chain constitute an open kinematic chain comprising only rotoid connections as perfect as ours. Whether the suspension thus designed applies to a front wheel or to a rear wheel, it is characterized by greater freedom of design than any other known suspension: it allows first of all to choose, with a certain freedom, the trajectory of the axis of the wheel with respect to the suspended element with respect to which it is guided, and this while respecting a favorable mass distribution; this design freedom above all makes it possible to obtain, without having to use any additional element, good anti-diving and anti-rearing characteristics.
Elle permet ensuite contrairement aux systèmes connus, de concilier une grande raideur transversale et une capacité propre d'amortissement élevée des vibrations horizontales et verticales, et ce, quelle que soit la trajectoire retenue pour 1' axe de 1a roue.It then makes it possible, contrary to known systems, to reconcile a great transverse stiffness and an inherent capacity of high damping of the horizontal and vertical vibrations, and this, whatever the trajectory chosen for the axis of the wheel.
Appliqué à la roue avant, ce système de suspension guide l'élément portant la roue et les étriers de frein par rapport au pivot de direction qui, solidaire du châssis, constitue 1 'élément suspendu. Dans une réalisation particulière d'une telle suspension avant, les deux éléments intermédiaires de la chaîne cinématique ouverte correspondant à la réalisation la plus courante évoquée ci-dessus sont des éléments ternaires, de manière à réduire l'importance des masses non suspendues. Dans une autre réalisation particulière, les éléments binaires de la chaîne cinématique fermée sont doublés symétriquement de manière à agir en parallèle ; une telle disposition permet de loger entre les éléments doublés la roue d'une part, et, d'autre part, le sous-système ressort-amortisseur alors constitué d'un seul ressort et d'un seul amortisseur coaxiaux de manière à faciliter les réglages.Applied to the front wheel, this suspension system guides the element carrying the wheel and the brake calipers with respect to the steering pivot which, integral with the chassis, constitutes the suspended element. In a particular embodiment of such a front suspension, the two intermediate elements of the open kinematic chain corresponding to the most common embodiment mentioned above are ternary elements, so as to reduce the importance of the unsprung masses. In another particular embodiment, the binary elements of the closed kinematic chain are symmetrically doubled so as to act in parallel; such an arrangement makes it possible to accommodate between the doubled elements the wheel on the one hand, and, on the other hand, the spring-shock absorber subsystem then consisting of a single spring and a single coaxial shock absorber so as to facilitate settings.
Appliqué à la roue arrière, ce système de suspension guide par rapport au châssis l'élément portant à la roue, l'ëtrier de frein et le pignon d'attaque du couple conique, organe terminal de la transmission de puissance à la roue, lorsque cette transmission est assurée par un arbre. Dans une réalisation particulière d'une telle suspension arrière, les deux éîëments intermédiaires de la chaîne cinématique ouverte sont l 'un binaire, l 'autre ternaire, de manière à faciliter l 'implantation du sous-système de guidage. Quelle que soit la réalisation de la suspension arrière conforme à l 'invention, cette suspension est la seule qui s'adapte naturellement à une transmission par arbre tout en préservant intégralement des capacités de filtrage horizontal et vertical . Les figures 1 , 2 et 3 des planches 1/2, 2/2 représentent à titre d'exemples non limitatifs deux suspensions conformes àApplied to the rear wheel, this suspension system guides, relative to the chassis, the element carrying the wheel, the brake caliper and the drive pinion of the bevel gear, the final member of the power transmission to the wheel, when this transmission is ensured by a tree. In a particular embodiment of such a rear suspension, the two intermediate elements of the open kinematic chain are one binary, the other ternary, so as to facilitate the installation of the guidance subsystem. Whatever the embodiment of the rear suspension in accordance with the invention, this suspension is the only one which naturally adapts to a shaft transmission while fully preserving horizontal and vertical filtering capacities. Figures 1, 2 and 3 of plates 1/2, 2/2 show by way of nonlimiting examples two suspensions in accordance with
1 ' i nvention.The invention.
La figure 1 de la planche 1/2 représente, en vue isométrique, une suspension avant. Les figures 2 et 3 de la planche 2/2 représentent respectivement une vue en élévation et une vue en plan, avec coupes partielles, d'une suspension arrière.Figure 1 of plate 1/2 shows, in isometric view, a front suspension. Figures 2 and 3 of the board 2/2 respectively show an elevational view and a plan view, with partial sections, of a rear suspension.
La roue avant 1 et les ëtriers de frein tels que 2 sont portés par la fourche 3 qui s'articule en a sur le culbuteur 4 qui constitue un élément ternaire articulé par ailleurs en b sur le basculeur 5 et en c' et c" sur des bielles telles que 6 elles-mêmes articulées en g' et g" sur le pivot de direction 8The front wheel 1 and the brake calipers such as 2 are carried by the fork 3 which is articulated in a on the rocker arm 4 which constitutes a ternary element articulated moreover in b on the rocker 5 and in c 'and c "on connecting rods such as 6 themselves articulated in g 'and g "on the steering pivot 8
(élément suspendu).(hanging element).
Le basculeur 5, deuxième élément ternaire, est articulé en d sur le pivot 8 et en e' et e" sur deux bielles telles que 7, elles-mêmes articulées en f et f" (f" non représenté) sur la fourche 3.The rocker 5, the second ternary element, is articulated at d on the pivot 8 and at e 'and e "on two connecting rods such as 7, themselves articulated at f and f" (f "not shown) on the fork 3.
Le combiné ressort-amortisseur 9 est articulé, d'une part, sur le pivot 8 et d'autre part, sur le culbuteur 4. Les six éléments théoriques de la chaîne cinématique fermée sont : la fourche 3, le culbuteur 4, le basculeur 5, la bielle 6 et son homologue, la bielle 7 et son homologue, ainsi que le pivot de direction 8.The combined shock absorber 9 is articulated, on the one hand, on the pivot 8 and on the other hand, on the rocker arm 4. The six theoretical elements of the closed kinematic chain are: the fork 3, the rocker arm 4, the rocker 5, the connecting rod 6 and its counterpart, the connecting rod 7 and its counterpart, as well as the steering pivot 8.
Les quatre éléments de la chaîne cinématique ouverte sont la fourche 3, le culbuteur 4, le basculeur 5 et le pivot de direction 8.The four elements of the open kinematic chain are the fork 3, the rocker arm 4, the rocker 5 and the steering pivot 8.
Les liaisons rotoïdes aussi parfaites que possible sont les liaisons a, b et d ; les quatre liaisons voulues imparfaites c ' , c", e' , e", f ' , f" et π ' , g" sont pour deux d'entre ellesThe rotoid bonds as perfect as possible are the bonds a, b and d; the four imperfect desired connections c ', c ", e', e", f ', f "and π', g" are for two of them
* Al f, f" et g', g" des silentblocs sur bague anti-friction, et pour les deux autres c', c" et e', e" des guidages cylindriques à aiguilles.* Al f, f "and g ', g" silent blocks on anti-friction ring, and for the other two c', c "and e ', e" cylindrical needle guides.
La roue arrière 10, l'étrier de frein 11, et le pignon d'attaque (non visible) sont portés par le carter 12, qui s'articule en h sur la bielle 13, elle-même articulée en i sur le balancier 14, premier élément ternaire, articulé, d'une part, en j sur le châssis 15 (élément suspendu) et, d'autre part, en k sur le culbuteur 16, second élément ternaire, lui-même articulé, d'une part, en 1 sur le carter 12, et, d'autre part, en m sur la bielle 17 également articulée en n sur le châssis 15.The rear wheel 10, the brake caliper 11, and the drive pinion (not visible) are carried by the casing 12, which is articulated in h on the connecting rod 13, itself articulated in i on the balance 14 , first ternary element, articulated, on the one hand, at j on the chassis 15 (suspended element) and, on the other hand, at k on the rocker arm 16, second ternary element, itself articulated, on the one hand, at 1 on the casing 12, and, on the other hand, at m on the connecting rod 17 also articulated at n on the chassis 15.
Le combiné ressort-amortisseur 18 est articulé d'une part en p sur le carter 12 et en q sur le châssis 15.The spring-damper combination 18 is articulated on the one hand at p on the casing 12 and at q on the chassis 15.
Les six éléments de la chaîne cinématique fermée sont le carter 12, la bielle 13, le balancier 14, le châssis 15, le culbuteur 16, et la bielle 17.The six elements of the closed kinematic chain are the casing 12, the connecting rod 13, the balance 14, the chassis 15, the rocker arm 16, and the connecting rod 17.
Les quatre éléments de la chaîne cinématique ouverte sont le carter 12, la bielle 13, le balancier 14 et le châssis 15;The four elements of the open kinematic chain are the casing 12, the connecting rod 13, the balance 14 and the chassis 15;
Les liaisons rotoïdes aussi parfaites que possible sont les liaisons h, i .et j ; les quatre autres liaisons k, 1, m, n voulues imparfaites sont pour deux d'entre elles k et n des guidages cylindriques à aiguilles et pour les deux autres 1 et m des silentblocs sur bagues anti -friction. The rotoid bonds as perfect as possible are the h, i and j bonds; the other four connections k, 1, m, n desired imperfect are for two of them k and n cylindrical guides with needles and for the other two 1 and m silentblocks on anti-friction rings.

Claims

REVENDICATIONS . CLAIMS.
1.' Suspension de motocyclette constituée d'un sous-système ressort-amortisseur unique et d'un sous-système de guidage, CARACTERISE en ce que le sous-système de guidage constitue avec l'élément suspendu (8, 15) une chaîne cinématique fermée théoriquement plane à six éléments (3, 4, 5, 6, 7 et 8 ou 12, 13, 14, 15, 16 et 17) et sept liaisons rotoïdes (a, b, c, d, e, f et g ou h, i, j, k, 1 et n) organisée de manière telle que l 'élément suspendu ( 8 ou 15) et l 'élément (3 ou 12) portant la roue (1 ou 10) matérialisent des éléments binaires de la chaîne cinématique sur chacun desquels s'articulent un élément binaire (6, 7, 13 ou 16) et un élément ternaire (4, 5, 14 ou 16).1. ' Motorcycle suspension consisting of a single shock-absorbing spring subsystem and a guidance subsystem, CHARACTERIZED in that the guidance subsystem constitutes with the suspended element (8, 15) a kinematic chain closed theoretically plane with six elements (3, 4, 5, 6, 7 and 8 or 12, 13, 14, 15, 16 and 17) and seven rotoid connections (a, b, c, d, e, f and g or h, i, j, k, 1 and n) organized in such a way that the suspended element (8 or 15) and the element (3 or 12) carrying the wheel (1 or 10) materialize binary elements of the kinematic chain on each of which is articulated a binary element (6, 7, 13 or 16) and a ternary element (4, 5, 14 or 16).
2. Suspension selon la revendication 1 caractérisée en ce que quatre (c, e, f, g, ou k, 1, m, n) des sept liaisons au plus sont voulues imparfaites par rapport à la liaison rotoïde théorique, l 'élément suspendu (8, 15), l'élément (3 ou 12) portant la roue (1 ou 10),et deux éléments intermédiaires (4 et 5 ou 12 et 13) de la chaîne cinématique fermée constituant une chaîne cinématique ouverte ne comportant que des liaisons rotoïdes aussi parfaites que possible.2. Suspension according to claim 1 characterized in that four (c, e, f, g, or k, 1, m, n) of the seven connections at most are desired to be imperfect with respect to the theoretical rotoid connection, the suspended element (8, 15), the element (3 or 12) carrying the wheel (1 or 10), and two intermediate elements (4 and 5 or 12 and 13) of the closed kinematic chain constituting an open kinematic chain comprising only rotoid bonds as perfect as possible.
3. Suspension selon la revendication 1 ou 2 appliquée à la roue avant (1) caractérisée en ce que l 'élément suspendu (8) est un pivot de direction solidaire du châssis.3. Suspension according to claim 1 or 2 applied to the front wheel (1) characterized in that the suspended element (8) is a steering pivot integral with the chassis.
4. Suspension selon la revendication 3 caractérisée en ce que les deux éléments -intermédiaires (4, 5) de la chaine cinématique ouverte sont ternaires.4. Suspension according to claim 3 characterized in that the two -intermediate elements (4, 5) of the open kinematic chain are ternary.
5. Suspension selon la revendications 3 ou 4 caractérisée en ce que les éléments binaires (3, 6, 7, 8) de la chaîne cinématique fermée sont doublés symétriquement de manière à agir en parallèle.5. Suspension according to claims 3 or 4 characterized in that the binary elements (3, 6, 7, 8) of the closed kinematic chain are symmetrically doubled so as to act in parallel.
6. Suspension selon la revendication 1 ou 2 appliquée à la roue arrière (10) , caractérisée en ce que l'élément suspendu (15) s'identifie au châssis de la motocyclette.6. Suspension according to claim 1 or 2 applied to the rear wheel (10), characterized in that the suspended element (15) is identified with the chassis of the motorcycle.
7. Suspension selon la revendication 6 caractérisée en ce que les deux éléments intermédiaires (13, 14) de la chaîne cinématique ouverte sont l'un (13) binaire, l'autre (14) te naire. 7. Suspension according to claim 6 characterized in that the two intermediate elements (13, 14) of the open kinematic chain are one (13) binary, the other (14) te naire.
EP19850905835 1984-12-04 1985-11-22 Suspension system applicable to the wheels of a motor cycle or any vehicle of the same technique Withdrawn EP0203951A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8418940 1984-12-04
FR8418940A FR2574041B1 (en) 1984-12-04 1984-12-04 SUSPENSION APPLICABLE TO THE WHEELS OF A MOTORCYCLE OR VEHICLE OF THE SAME TECHNIQUE

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EP0203951A1 true EP0203951A1 (en) 1986-12-10

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EP19850905835 Withdrawn EP0203951A1 (en) 1984-12-04 1985-11-22 Suspension system applicable to the wheels of a motor cycle or any vehicle of the same technique

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EP (1) EP0203951A1 (en)
FR (1) FR2574041B1 (en)
WO (1) WO1986003467A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2730457B1 (en) * 1995-02-13 1997-04-18 Offenstadt Eric VEHICLE SUSPENSION DEVICE WITH STEERING FRONT WHEEL AND CORRESPONDING VEHICLE

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2346174A2 (en) * 1975-04-03 1977-10-28 Doncque Pierre Rear suspension for motor cycle wheel - has fork pivoted to frame and attached by linkages to spring below pivot height
CA1137880A (en) * 1979-10-04 1982-12-21 Tokio Isono Shock absorbing device for rear wheel of motorcycle
US4401316A (en) * 1980-03-17 1983-08-30 Honda Giken Kogyo Kabushiki Kaisha Front suspension for motocycle
AU538962B2 (en) * 1981-05-26 1984-09-06 Honda Giken Kogyo Kabushiki Kaisha Motorcycle wheel suspension
AT374431B (en) * 1981-06-10 1984-04-25 Bombardier Rotax Gmbh DEVICE FOR SPRINGLY SUPPORTING THE REAR WHEEL SWING OF A TWO-WHEEL MOTOR VEHICLE
JPS58214486A (en) * 1982-06-07 1983-12-13 本田技研工業株式会社 Link type rear suspension for motorcycle
US4574909A (en) * 1982-08-27 1986-03-11 Diafil International S.A. Suspension system for the rear wheel of a motorcycle

Non-Patent Citations (1)

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Title
See references of WO8603467A1 *

Also Published As

Publication number Publication date
FR2574041B1 (en) 1987-01-16
FR2574041A1 (en) 1986-06-06
WO1986003467A1 (en) 1986-06-19

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