EP0465582A1 - Device for driving the front wheel of a two-wheel drive motorcycle, and motorcycle associated - Google Patents

Device for driving the front wheel of a two-wheel drive motorcycle, and motorcycle associated

Info

Publication number
EP0465582A1
EP0465582A1 EP90906246A EP90906246A EP0465582A1 EP 0465582 A1 EP0465582 A1 EP 0465582A1 EP 90906246 A EP90906246 A EP 90906246A EP 90906246 A EP90906246 A EP 90906246A EP 0465582 A1 EP0465582 A1 EP 0465582A1
Authority
EP
European Patent Office
Prior art keywords
front wheel
strut
driving
axis
motorcycle
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Withdrawn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
EP90906246A
Other languages
German (de)
French (fr)
Inventor
Jean-Yves Charron
Francois Lacoste
Franck Savard
Patrick André Savard
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0465582A1 publication Critical patent/EP0465582A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
    • 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
    • B62K25/06—Axle suspensions for mounting axles resiliently on cycle frame or fork with telescopic fork, e.g. including auxiliary rocking arms
    • B62K25/08—Axle suspensions for mounting axles resiliently on cycle frame or fork with telescopic fork, e.g. including auxiliary rocking arms 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
    • B62K25/12—Axle suspensions for mounting axles resiliently on cycle frame or fork with rocking arm pivoted on each fork leg
    • B62K25/22—Axle suspensions for mounting axles resiliently on cycle frame or fork with rocking arm pivoted on each fork leg with more than one arm on each fork leg
    • B62K25/24—Axle suspensions for mounting axles resiliently on cycle frame or fork with rocking arm pivoted on each fork leg with more than one arm on each fork leg for front wheel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M23/00—Transmissions characterised by use of other elements; Other transmissions

Definitions

  • the present invention relates to a device for driving the front wheel of a two-wheel drive motorcycle and the associated motorcycle.
  • a device for driving the front steering wheel of a two-wheel drive motorcycle is known from PCT patent application number FR 88/00073.
  • This motorcycle is equipped with a suspension of the front wheel which includes an oscillating arm articulated with respect to the frame or the motor at one of its ends and supporting a directional hub at its other end.
  • a damping member is interposed between the swinging arm and a part of the frame so as to dampen the oscillations of the front wheel.
  • a rigid fork integral at its two lower ends with the directional hub and at its upper end with a compass itself connected to the steering column, allows the orientation of the front wheel.
  • the structure of the motorcycle is completed by a strut interposed between the drive means and the fork, articulated at its two ends so that the two ends of the strut and the two ends of the swing arm constitute the tops of 'a deformable quadrilateral.
  • this structure requires numerous articulations between the first branch of the compass and the steering column, between the two branches of the compass, between the second branch of the compass and the fork, between the swing arm and the motor, between the swing arm and the directional hub, between the fork and the directional hub.
  • the present invention relates to a drive device for the front wheel of a two-wheel drive motorcycle which requires a limited number of parts, in particular articulations, which uses a non-directional front hub, which removes the arm oscillating before, whose cost price is low.
  • the device for driving the front steering wheel of a two-wheel drive motorcycle by means of a handlebar rotating in a steering column comprises a strut disposed between the suspension of the front wheel and the driving means, provided with a first transmission member, a second transmission member disposed between this strut and the front wheel, this device being characterized in that the suspension of the front wheel is telescopic and comprises at minus a fork tube articulated with respect to the steering column and slidably mounted in a sleeve integral with the axis of the front wheel, damping means being interposed between the tube and the sleeve.
  • the device comprises a suspension with two tubes of fork and two sleeves, the two sets of tubes and sleeves being parallel.
  • the device comprises a relay box disposed between the first and second transmission members and supported by two upper and lower fork plates fixed on at least one of the sleeves.
  • this housing comprises a casing articulated around an axis substantially parallel to one of the sleeves.
  • the casing of this relay box is substantially cylindrical and its longitudinal axis is oriented perpendicular to the sheath.
  • the housing comprises an input element of a universal joint mounted in rotation in the housing of this housing, the input element and the housing being coaxial.
  • the input element is integral with a coaxial driven pinion and mounted at the periphery, the plane of rotation of the pinion passing through the axis of articulation of the relay box and through the axis of articulation of the gimbal.
  • the cardan output element is also rotatably mounted in a bearing support, fixed on at least one of the plates so that the axes of rotation of the cardan input and output elements are in the same plan.
  • the output of the gimbal also includes a pinion mounted coaxial which cooperates with the second transmission member.
  • the end of the strut is rotatably mounted around the relay box, the longitudinal axis of the strut of force being perpendicular to the longitudinal axis of the housing.
  • the invention also relates to a two-wheel drive motorcycle comprising a drive device having the characteristics listed above.
  • FIG. 1 represents a schematic side elevation view of a motorcycle fitted with the drive device according to the invention
  • FIG. 2 represents a front view in partial section of the relay box secured to the plates and sheaths of the telescopic fork
  • FIG. 3 represents a sectional view along the axis 3-3 of FIG. 2, and
  • Figure 4 shows a top view along line 4-4 of Figure 2.
  • the motorcycle represented in FIG. 1 comprises a frame 10, a motor 12 fixed to the frame as well as a rear suspension 14 and a front suspension 16 supporting the rear wheels 18 and front 20 respectively.
  • the motorcycle is completed by a steering column 22 secured to a handlebar 24 by means of an upper steering plate 26.
  • the rear suspension comprises a known swing arm 28 and a damper element 30 also known, of the cantilever type, and interposed between this swing arm and the frame 10.
  • the rear wheel is driven by a pinion-chain-chain assembly 32.
  • the engine 12 includes a gearbox 34 and a gearbox output shaft 36 used for driving.
  • the engine 12 is also supplemented by an exhaust system 38 known as such.
  • the front wheel drive device 20 which is also steerable comprises a strut 40 forming a casing for a first transmission member 42 of the chain type shown in detail in FIG. 3.
  • This strut 40 is mounted on the one of its ends 44 coaxially with the gearbox output shaft 36 and at its second end 46 on a relay box 48 as will be described in detail later.
  • the strut is completed by lateral stiffeners 50 which make it possible to stiffen this strut in the lateral direction.
  • the relay box 48 is fixed on the sleeves 52 of a telescopic front fork 54 which completes this front suspension 16.
  • the sleeves 52 are integral with an axle 56 on which the front wheel 20 is rotatably mounted, eccentrically in order to give a certain inclination to the front suspension while respecting a given caster angle.
  • the drive device is completed by a second transmission member 58, also comprising a pinion disposed in the relay box, a chain and a plate secured to the front wheel.
  • the front fork is for its part supplemented by fork tubes 60 which cooperate with the forks 52 to constitute a telescopic system.
  • FIG. 2 there is a detailed representation with partial section of the telescopic front fork 54 and more particularly of the sleeves 52 and the fork tubes 60.
  • the fork tube 60 slides in the sleeve 52, the seal being obtained by means of seals 62 interposed between the sleeve and the tube at the upper end of the sleeve, a cover 64 completing the seal.
  • Damping means 66 are interposed between the tube and the sheath, these damping means tending to push the fork tubes out of the sheaths. These damping means use springs, hydraulic or gas piston type assemblies or else combine several of these techniques.
  • Each sheath comprises fixing lugs 68 supporting an upper fork plate 70 and a lower fork plate 72.
  • the fixing is obtained using screws 74. These two plates are spaced from one another by about ten centimeters to fix an order of magnitude.
  • the relay box 48 comprises a substantially cylindrical casing 76.
  • the longitudinal axis 78 is horizontal and oriented perpendicular to the sheath.
  • Two upper 80 and lower 82 journals are integral with the housing 76 and project outside of this housing, being diametrically opposed along an axis 84.
  • This axis 84 is substantially parallel to the sleeves.
  • the input element 94 of a universal joint 96 is rotatably mounted inside the housing 76 by means of bearings 98, this input element being coaxial with the housing 76, the axis of rotation being the axis 78.
  • a driven pinion 100 is fixed to the input element 74 at the periphery of the latter so that the plane containing the teeth of the pinion passes through the axis 84 of rotation of the casing 76.
  • the universal joint 96 comprises in known manner a cross-piece 102 coplanar with the driven pinion 100.
  • This cross-piece 102 is mounted in needle bushings 104, a pair of bushings being integral with the input element 94, one of the branches of the rotary cross-beam inside these sockets and another pair of sockets being integral with the output element 106 of the cardan joint 96 as is better represented in FIG. 3, the other branch of the cross rotating in these sockets.
  • This outlet element 106 is rotatably mounted in a support 108 integral with at least one of the plates, in this case the lower fork plate 72.
  • the rotational assembly is carried out using a bearing 110 , the end 112 of the output element projecting outside the support 108, this end 112 receiving a driving pinion 114.
  • the output element and the driving pinion rotate about an axis of rotation 116 and cooperate with a chain 140.
  • the various elements attached to the receiving parts such as pinions, bearings, spacers, are fixed by slotted stop washers 118.
  • the strut 40 is rotatably mounted around the casing 76 of the relay box by means of bearings 120 and 122, allowing respectively the rotation between the casing 76 and the strut 40, and the lateral positioning of this strut relative to the casing 76.
  • the strut comprises lights 124 and 126 respectively disposed in the upper and lower parts so that the strut 40 can be angularly oriented in the direction of arrow 12B relative to the casing 76 without the pins 80 and 82 blocking this movement.
  • the size of the lights must correspond to the maximum clearance of the longitudinal axis of the strut relative to the axis 84 of rotation of the relay box 48.
  • the casing 76 includes lights 130 and 132 which allow the chain of the first transmission member 42 to enter and exit regardless of the inclination of the strut.
  • the strut 40 is, for manufacturing reasons, made in two parts assembled by means of bolts by means of lugs 134 regularly distributed all along the periphery of this strut.
  • This strut also includes reinforcements 136 and slides 138 of polytetraf luoroethylene or "nylon" type material which provides soundproofing and limits losses due to friction.
  • reinforcements 136 and slides 138 of polytetraf luoroethylene or "nylon" type material which provides soundproofing and limits losses due to friction.
  • the motor drives the gearbox output shaft 36 which itself, thanks to a pinion, drives the chain of the first transmission member 42 in rotation, this chain in turn driving the driven pinion 100 and simultaneously the input element 94 cardan 96 with which it is secured.
  • the input element 94 by means of the spider 102 rotating in the needle sleeves 104, causes the synchronous rotation of the output element 106 and consecutively that of the driving pinion 114 which by means of the chain 140 drives the plate secured to the front wheel 20.
  • This drive device cooperates with the front suspension 16 in the direction where the fork tubes 60 slide in the sleeves 52 as a function of the profile of the terrain on which the motorcycle moves, the strut 40 now constant the distance between the relay box 48 and the gearbox output shaft 36, the telescopic front fork 54 tilting more or less relative to the frame 10 thanks to the upper steering plate 26.
  • the strut 40 pivots around the relay box 48 by means of the bearings 120 and 122. This position corresponds to a displacement of the motorcycle in a straight line, so that the planes of the driven pinions 100 and leading 114 are parallel, only the strut 40 oscillating around the relay box 48 and more particularly of the casing 76.
  • the motorcycle moves by making a turn, that is to say that there is rotation of the handlebar 24, therefore displacement movement of the fork tubes relative to the axis 84, the strut 40 remains in the longitudinal axis of the motorcycle just like the casing 76 on the other hand the upper 70 and lower 72 fork plates as well as the pinion support 108 are rotated around the axis 84, so that the driven pinions 100 and leading 114 are no longer in parallel planes. Transmission is then ensured by the universal joint 96.
  • the elements which constitute the first transmission member remain aligned with one another and the elements constituting the second transmission member 58 also remain aligned with each other whatever the position of the fork tubes relative to to the sleeves and whatever the steering angle of the front wheel with the longitudinal axis of the motorcycle.
  • Such a drive device makes it possible to simplify the front suspension and to use a simple telescopic system while maintaining a constant chain tension and eliminating any chain length compensating tensioner.

Abstract

Dispositif d'entraînement de la roue avant (20) directrice d'une motocyclette à deux roues motrices au moyen d'un guidon (24) tournant dans une colonne de direction (22), comprenant une jambe de force (40) disposée entre la suspension (16) de la roue avant et les moyens moteurs (12), munie d'un premier organe de transmission (42), un second organe de transmission (58) disposé entre cette jambe de force (40) et la roue avant (20) caractérisé en ce que la suspension (16) de la roue avant est télescopique comprenant au moins un tube de fourche (60) articulé par rapport à la colonne de direction (22) et monté coulissant dans un fourreau (52) solidaire de l'axe (56) de la roue avant (20), des moyens amortisseurs (66) étant interposés entre ce tube et ce fourreau. L'invention a pour objet la moto équipée de ce dispositif.Driving device for the front wheel (20) driving a two-wheel drive motorcycle by means of a handlebar (24) rotating in a steering column (22), comprising a strut (40) disposed between the suspension (16) of the front wheel and the drive means (12), provided with a first transmission member (42), a second transmission member (58) disposed between this strut (40) and the front wheel ( 20) characterized in that the suspension (16) of the front wheel is telescopic comprising at least one fork tube (60) articulated with respect to the steering column (22) and mounted sliding in a sheath (52) integral with the axis (56) of the front wheel (20), damping means (66) being interposed between this tube and this sheath. The invention relates to a motorcycle equipped with this device.

Description

Dispositif d'entraînement de la roue avant d'une motocyclette à deux roues motrices et la motocyclette associée. Drive device for the front wheel of a two-wheel drive motorcycle and the associated motorcycle.
La présente invention a pour objet un dispositif d'entraînement de la roue avant d'une motocyclette à deux roues motrices et la motocyclette associée. On connaît dans la demande de brevet PCT numéro FR 88/00073 un dispositif d'entraînement de la roue avant directrice d'une motocyclette à deux roues motrices. The present invention relates to a device for driving the front wheel of a two-wheel drive motorcycle and the associated motorcycle. A device for driving the front steering wheel of a two-wheel drive motorcycle is known from PCT patent application number FR 88/00073.
Cette motocyclette est équipée d'une suspension de la roue avant qui comprend un bras oscillant articulé par rapport au cadre ou au moteur à l'une de ses extrémités et supportant un moyeu directionnel à son autre extrémité.  This motorcycle is equipped with a suspension of the front wheel which includes an oscillating arm articulated with respect to the frame or the motor at one of its ends and supporting a directional hub at its other end.
Un organe amortisseur est interposé entre le bras oscillant et une partie du cadre de façon à amortir les oscillations de la roue avant. Une fourche rigide, solidaire à ses deux extrémités inférieures du moyeu directionnel et à son extrémité supérieure d'un compas lui-même relié à la colonne de direction, permet l'orientation de la roue avant.  A damping member is interposed between the swinging arm and a part of the frame so as to dampen the oscillations of the front wheel. A rigid fork, integral at its two lower ends with the directional hub and at its upper end with a compass itself connected to the steering column, allows the orientation of the front wheel.
La structure de la motocyclette est complétée par une jambe de force interposée entre les moyens d'entraînement et la fourche, articulée à ses deux extrémités de façon que les deux extrémités de la jambe de force et les deux extrémités du bras oscillant constituent les sommets d'un quadrilatère déformable. The structure of the motorcycle is completed by a strut interposed between the drive means and the fork, articulated at its two ends so that the two ends of the strut and the two ends of the swing arm constitute the tops of 'a deformable quadrilateral.
Bien que donnant toute satisfaction cette structure requiert de nombreuses articulations entre la première branche du compas et la colonne de direction, entre les deux branches du compas, entre la seconde branche du compas et la fourche, entre le bras oscillant et le moteur, entre le bras oscillant et le moyeu directionnel, entre la fourche et le moyeu directionnel. Dans certaines applications de la moto à deux roues motrices, par exemple lors d'utilisation intensive en milieu hostile tel que sable, boue, que ce soit pour des épreuves sportives ou pour des applications militaires, il peut ftre intéressant de prévoir un dispositif d'entraînement qui participe de façon plus active à la suspension et que celle- ci soit également simplifiée. Although satisfactory, this structure requires numerous articulations between the first branch of the compass and the steering column, between the two branches of the compass, between the second branch of the compass and the fork, between the swing arm and the motor, between the swing arm and the directional hub, between the fork and the directional hub. In certain applications of the two-wheel drive motorcycle, for example during intensive use in a hostile environment such as sand, mud, whether for sporting events or for military applications, it may be advantageous to provide a device for training which participates more actively in the suspension and that it is also simplified.
La présente invention a pour objet uιn dispositif d'entraînement de la roue avant d'une motocyclette à deux roues motrices qui requiert un nombre limité de pièces, notamment d'articulations, qui fait appel à un moyeu avant non directionnel, qui supprime le bras oscillant avant, dont le prix de revient est faible. The present invention relates to a drive device for the front wheel of a two-wheel drive motorcycle which requires a limited number of parts, in particular articulations, which uses a non-directional front hub, which removes the arm oscillating before, whose cost price is low.
A cette fin, selon l'invention, le dispositif d'entraînement de la roue avant directrice d'une motocyclette à deux roues motrices au moyen d'un guidon tournant dans une colonne de direction comprend une jambe de force disposée entre la suspension de la roue avant et les moyens moteurs, munie d'un premier organe de transmission, un second organe de transmission disposé entre cette jambe de force et la roue avant, ce dispositif se caractérisant en ce que la suspension de la roue avant est télescopique et comprend au moins un tube de fourche articulé par rapport a la colonne de direction et monté coulissant dans un fourreau solidaire de l'axe de la roue avant, des moyens amortisseurs étant interposés entre le tube et le fourreau.  To this end, according to the invention, the device for driving the front steering wheel of a two-wheel drive motorcycle by means of a handlebar rotating in a steering column comprises a strut disposed between the suspension of the front wheel and the driving means, provided with a first transmission member, a second transmission member disposed between this strut and the front wheel, this device being characterized in that the suspension of the front wheel is telescopic and comprises at minus a fork tube articulated with respect to the steering column and slidably mounted in a sleeve integral with the axis of the front wheel, damping means being interposed between the tube and the sleeve.
Selon un mode de réalisation préférentiel, le dispositif comprend une suspension à deux tubes de fourche et deux fourreaux, les deux ensembles tubes et fourreaux étant parallèles. According to a preferred embodiment, the device comprises a suspension with two tubes of fork and two sleeves, the two sets of tubes and sleeves being parallel.
Selon une autre caractéristique, le dispositif comprend un boîtier relais disposé entre les premier et second organes de transmission et supporté par deux platines de fourche supérieure et inférieure fixées sur l'un des fourreaux au moins.  According to another characteristic, the device comprises a relay box disposed between the first and second transmission members and supported by two upper and lower fork plates fixed on at least one of the sleeves.
Plus particulièrement, ce boîtier comprend un carter articulé autour d'un axe sensiblement parailèle à l'un des fourreaux. More particularly, this housing comprises a casing articulated around an axis substantially parallel to one of the sleeves.
Le carter de ce boîtier relais est sensiblement cylindrique et son axe longitudinal est orienté perpendiculairement au fourreau.  The casing of this relay box is substantially cylindrical and its longitudinal axis is oriented perpendicular to the sheath.
Selon une autre caractéristique, le boîtier comprend un élément d'entrée d'un cardan monté à rotation dans le carter de ce boîtier, l'élément d'entrée et le carter étant coaxiaux. According to another characteristic, the housing comprises an input element of a universal joint mounted in rotation in the housing of this housing, the input element and the housing being coaxial.
L'élément d'entrée est solidaire d'un pignon mené coaxial et monté en périphérie, le plan de rotation du pignon passant par l'axe d'articulation du boîtier relais et par l'axe d'articulation du cardan. The input element is integral with a coaxial driven pinion and mounted at the periphery, the plane of rotation of the pinion passing through the axis of articulation of the relay box and through the axis of articulation of the gimbal.
De plus, l'élément de sortie du cardan est également monté à rotation dans un support formant palier, fixé sur l'une des platines au moins de façon que les axes de rotation des éléments d'entrée et de sortie du cardan soient dans le même plan. L'élément de sortie du cardan comprend également un pignon monté coaxial qui coopère avec le second organe de transmission.  In addition, the cardan output element is also rotatably mounted in a bearing support, fixed on at least one of the plates so that the axes of rotation of the cardan input and output elements are in the same plan. The output of the gimbal also includes a pinion mounted coaxial which cooperates with the second transmission member.
Selon une caractéristique particulière l'extrémité de la jambe de force est montée à rotation autour du boîtier relais, l'axe longitudinal de la jambe de force étant perpendiculaire à l'axe longitudinal du boîtier. According to a particular characteristic, the end of the strut is rotatably mounted around the relay box, the longitudinal axis of the strut of force being perpendicular to the longitudinal axis of the housing.
L'invention a également pour objet une motocyclette à deux roues motrices comprenant un dispositif d'entraînement ayant les caractéristiques énumérées ci-avant.  The invention also relates to a two-wheel drive motorcycle comprising a drive device having the characteristics listed above.
L'invention est décrite ci-après selon un mode de réalisation particulier en regard des dessins annexées sur lesquels :  The invention is described below according to a particular embodiment with reference to the accompanying drawings in which:
- la figure 1 représente une vue schématique en élévation latérale d'une motocyclette munie du dispositif d'entraînement selon l'invention, FIG. 1 represents a schematic side elevation view of a motorcycle fitted with the drive device according to the invention,
- la figure 2 représente une vue de face en coupe partielle du boîtier relais solidaire des platines et des fourreaux de la fourche télescopique,  FIG. 2 represents a front view in partial section of the relay box secured to the plates and sheaths of the telescopic fork,
- la figure 3 représente une vue en coupe suivant l'axe 3-3 de la figure 2, et  FIG. 3 represents a sectional view along the axis 3-3 of FIG. 2, and
- la figure 4 représente une vue de dessus suivant la ligne 4-4 de la figure 2.  - Figure 4 shows a top view along line 4-4 of Figure 2.
La motocyclette représentée sur la figure 1 comprend un cadre 10, un moteur 12 fixé au cadre ainsi qu'une suspension arrière 14 et une suspension avant 16 supportant respectivement les roues arrière 18 et avant 20. La motocyclette est complétée par une colonne de direction 22 solidaire d'un guidon 24 par l'intermédiaire d'une platine supérieure de direction 26. The motorcycle represented in FIG. 1 comprises a frame 10, a motor 12 fixed to the frame as well as a rear suspension 14 and a front suspension 16 supporting the rear wheels 18 and front 20 respectively. The motorcycle is completed by a steering column 22 secured to a handlebar 24 by means of an upper steering plate 26.
La suspension arriére comprend un bras oscillant 28 connu et un élément amortisseur 30 également connu, du type cantilever, et interposé entre ce bras oscillant et le cadre 10. La roue arrière est entraînée par un ensemble 32 pignon-plateau-chaîne. Le moteur 12 comprend une boîte de vitesses 34 et un arbre de sortie de boite 36 servant à l'entraînement. The rear suspension comprises a known swing arm 28 and a damper element 30 also known, of the cantilever type, and interposed between this swing arm and the frame 10. The rear wheel is driven by a pinion-chain-chain assembly 32. The engine 12 includes a gearbox 34 and a gearbox output shaft 36 used for driving.
Le moteur 12 est également complété par un système d'échappement 38 connu en tant que tel.  The engine 12 is also supplemented by an exhaust system 38 known as such.
Le dispositif d'entraînement de la roue avant 20 qui est également directrice comprend une jambe de force 40 formant carter pour un premier organe de transmission 42 du type chaîne représenté en détail sur la figure 3. Cette jambe de force 40 est montée à l'une de ses extrémités 44 de façon coaxiale à l'arbre 36 de sortie de boîte et à sa seconde extrémité 46 sur un boîtier relais 48 ainsi que cela sera décrit en détail ultérieurement. The front wheel drive device 20 which is also steerable comprises a strut 40 forming a casing for a first transmission member 42 of the chain type shown in detail in FIG. 3. This strut 40 is mounted on the one of its ends 44 coaxially with the gearbox output shaft 36 and at its second end 46 on a relay box 48 as will be described in detail later.
La jambe de force est complétée par des raidisseurs latéraux 50 qui permettent de rigidifier cette jambe de force dans le sens latéral. The strut is completed by lateral stiffeners 50 which make it possible to stiffen this strut in the lateral direction.
Le boîtier relais 48 est fixé sur les fourreaux 52 d'une fourche avant télescopique 54 qui complète cette suspension avant 16. Les fourreaux 52 sont solidaires d'un axe 56 sur lequel la roue avant 20 est montée à rotation, de façon excentrée afin de donner une certaine inclinaison à la suspension avant en respectant un angle de chasse donné.  The relay box 48 is fixed on the sleeves 52 of a telescopic front fork 54 which completes this front suspension 16. The sleeves 52 are integral with an axle 56 on which the front wheel 20 is rotatably mounted, eccentrically in order to give a certain inclination to the front suspension while respecting a given caster angle.
Le dispositif d'entraînement est complété par un second organe de transmission 58, comprenant également un pignon disposé dans le boîtier relais, une chaîne et un plateau solidaire de la roue avant. La fourche avant est quant à elle complétée par des tubes de fourche 60 qui coopèrent avec les four- reaux 52 pour constituer un système télescopique.The drive device is completed by a second transmission member 58, also comprising a pinion disposed in the relay box, a chain and a plate secured to the front wheel. The front fork is for its part supplemented by fork tubes 60 which cooperate with the forks 52 to constitute a telescopic system.
Sur la figure 2, on a une représentation détaillée avec coupe partielle de la fourche avant télescopique 54 et plus particulièrement des fourreaux 52 et des tubes de four.che 60. De façon connue pour chaque système le tube de fourche 60 coulisse dans le fourreau 52, l'étanchéité étant obtenue grâce à des joints 62 interposés entre le fourreau et le tube à l'extrémité supérieure du fourreau, un cache 64 venant compléter l'étanchéité. In FIG. 2, there is a detailed representation with partial section of the telescopic front fork 54 and more particularly of the sleeves 52 and the fork tubes 60. In a manner known for each system the fork tube 60 slides in the sleeve 52, the seal being obtained by means of seals 62 interposed between the sleeve and the tube at the upper end of the sleeve, a cover 64 completing the seal.
Des moyens amortisseurs 66 sont interposés entre le tube et le fourreau, ces moyens amortisseurs ayant tendance à repousser les tubes de fourche à l'extérieur des fourreaux. Ces moyens amortisseurs font appel à des ressorts, à des montages type piston hydraulique ou à gaz ou bien combinent plusieurs de ces techniques.  Damping means 66 are interposed between the tube and the sheath, these damping means tending to push the fork tubes out of the sheaths. These damping means use springs, hydraulic or gas piston type assemblies or else combine several of these techniques.
Chaque fourreau comprend des pattes de fixation 68 supportant une platine supérieure de fourche 70 et une platine inférieure de fourche 72. La fixation est obtenue à l'aide de vis 74. Ces deux platines sont distantes l'une de l'autre d'une dizaine de centimètres environ pour fixer un ordre de grandeur.  Each sheath comprises fixing lugs 68 supporting an upper fork plate 70 and a lower fork plate 72. The fixing is obtained using screws 74. These two plates are spaced from one another by about ten centimeters to fix an order of magnitude.
Le boîtier relais 48 comprend un carter 76 sensiblement cylindrique don. l'axe longitudinal 78 est horizontal et orienté perpendiculairement au fourreau. The relay box 48 comprises a substantially cylindrical casing 76. the longitudinal axis 78 is horizontal and oriented perpendicular to the sheath.
Deux tourillons supérieur 80 et inférieur 82 sont venus de matière avec le carter 76 et font saillie à l'extérieur de ce carter, en étant diamétralement opposés suivant un axe 84. Cet axe 84 est sensiblement parallèle aux fourreaux. Two upper 80 and lower 82 journals are integral with the housing 76 and project outside of this housing, being diametrically opposed along an axis 84. This axis 84 is substantially parallel to the sleeves.
Ces deux tourillons 80 et 82 sont fixés respectivement sur la platine supérieure de fourche 70 et sur la platine inférieure de fourche 72 au moyen de vis 86 et 88, ces vis étant montées à rotation par rapport aux platines grâce à des paliers 90 et 92, ces paliers étant encastrés dans des logements ménagés dans chacune des platines. Le carter 76 est donc mobile en rotation autour de l'axe 84. These two pins 80 and 82 are fixed respectively on the upper fork plate 70 and on the lower fork plate 72 by means of screws 86 and 88, these screws being mounted in rotation relative to the plates by means of bearings 90 and 92, these bearings being embedded in housings arranged in each of the plates. The casing 76 is therefore movable in rotation about the axis 84.
L'élément d'entrée 94 d'un cardan 96 est monté à rotation à l'intérieur du carter 76 grâce à des paliers 98, cet élément d'entrée étant coaxial avec le carter 76, l'axe de rotation étant l'axe 78. Un pignon mené 100 est fixé sur l'élément d'entrée 74 à la périphérie de celui-ci de façon que le plan contenant les dents du pignon passe par l'axe 84 de rotation du carter 76. The input element 94 of a universal joint 96 is rotatably mounted inside the housing 76 by means of bearings 98, this input element being coaxial with the housing 76, the axis of rotation being the axis 78. A driven pinion 100 is fixed to the input element 74 at the periphery of the latter so that the plane containing the teeth of the pinion passes through the axis 84 of rotation of the casing 76.
Le cardan 96 comprend de façon connue un croisillon 102 coplanaire avec le pignon mené 100. Ce croisillon 102 est monté dans des douilles à aiguilles 104, une paire de douilles étant solidaire de l'élément d'entrée 94, une des branches du croisillon tournant à l'intérieur de ces douilles et une autre paire de douilles étant solidaire de l'élément de sortie 106 du cardan 96 ainsi que cela est mieux représenté sur la figure 3, l'autre branche du croisillon tournant dans ces douilles. Cet élément de sortie 106 est monté à rotation dans un support 108 solidaire de l'une au moins des platines, en l'occurrence de la platine inférieure de fourche 72. Le montage à rotation est réalisé à l'aide d'un palier 110, l'extrémité 112 de l'élément de sortie faisant saillie à l'extérieur du support 108, cette extrémité 112 recevant un pignon menant 114. L'élément de sortie et le pignon menant tournent autour d'un axe de rotation 116 et coopère avec une chaîne 140.  The universal joint 96 comprises in known manner a cross-piece 102 coplanar with the driven pinion 100. This cross-piece 102 is mounted in needle bushings 104, a pair of bushings being integral with the input element 94, one of the branches of the rotary cross-beam inside these sockets and another pair of sockets being integral with the output element 106 of the cardan joint 96 as is better represented in FIG. 3, the other branch of the cross rotating in these sockets. This outlet element 106 is rotatably mounted in a support 108 integral with at least one of the plates, in this case the lower fork plate 72. The rotational assembly is carried out using a bearing 110 , the end 112 of the output element projecting outside the support 108, this end 112 receiving a driving pinion 114. The output element and the driving pinion rotate about an axis of rotation 116 and cooperate with a chain 140.
Les différents éléments rapportés sur les pièces réceptrices telles que pignons, paliers, entretoises, sont fixés par des rondelles d'arrêt 118 fendues. Ainsi que cela est représenté sur la figure 2 et plus en détail sur la figure 3, la jambe de force 40 est montée à rotation autour du carter 76 du boîtier relais grâce à des roulements 120 et 122, permettant respectivement la rotation entre le carter 76 et la jambe de force 40, et le positionnement latéral de cette jambe de force par rapport au carter 76. The various elements attached to the receiving parts such as pinions, bearings, spacers, are fixed by slotted stop washers 118. As shown in FIG. 2 and in more detail in FIG. 3, the strut 40 is rotatably mounted around the casing 76 of the relay box by means of bearings 120 and 122, allowing respectively the rotation between the casing 76 and the strut 40, and the lateral positioning of this strut relative to the casing 76.
La jambe de force comprend des lumières 124 et 126 disposées respectivement en partie supérieure et inférieure de façon que la jambe de force 40 puisse être orientée angulairement suivant la flèche 12B par rapport au carter 76 sans que les tourillons 80 et 82 ne bloquent ce mouvement. La taille des lumières doit correspondre au débattement maximum de l'axe longitudinal de la jambe de force par rapport à l'axe 84 de rotation du boîtier relais 48. The strut comprises lights 124 and 126 respectively disposed in the upper and lower parts so that the strut 40 can be angularly oriented in the direction of arrow 12B relative to the casing 76 without the pins 80 and 82 blocking this movement. The size of the lights must correspond to the maximum clearance of the longitudinal axis of the strut relative to the axis 84 of rotation of the relay box 48.
De même, le carter 76 comprend des lumières 130 et 132 qui permettent le passage de la chaîne du premier organe de transmission 42 en entrée et en sortie quelle que soit l'inclinaison de la jambe de force. Likewise, the casing 76 includes lights 130 and 132 which allow the chain of the first transmission member 42 to enter and exit regardless of the inclination of the strut.
La jambe de force 40 est, pour des raisons de fabrication, réalisée en deux parties assemblées au moyen de boulons grâce à des pattes 134 régulièrement réparties tout le long de la périphérie de cette jambe de force. The strut 40 is, for manufacturing reasons, made in two parts assembled by means of bolts by means of lugs 134 regularly distributed all along the periphery of this strut.
Cette jambe de force comprend également des ren- forts 136 et des glissières 138 en matériau type polytétraf luoroéthy lène ou "nylon " qui assure l'insonorisation et limite les pertes dues aux frottements. Sur la figure 4 les pièces identiques et déjà représentées sur les figures 1, 2 et 3 portent les mêmes références. This strut also includes reinforcements 136 and slides 138 of polytetraf luoroethylene or "nylon" type material which provides soundproofing and limits losses due to friction. In Figure 4 the identical parts and already shown in Figures 1, 2 and 3 have the same references.
Le fonctionnement du dispositif selon l'invention est décrit ci-après.  The operation of the device according to the invention is described below.
Le moteur entraîne l'arbre de sortie de boîte 36 qui lui-même grâce à un pignon entraîne la chaîne du premier organe de transmission 42 en rotation, cette chaîne entraînant à son tour le pignon mené 100 et simultanément l'élément d'entrée 94 du cardan 96 avec lequel il est solidarisé. L'élément d'entrée 94 par l'intermédiaire du croisillon 102 tournant dans les douilles à aiguilles 104, provoque la mise en rotation synchrone de l'élément de sortie 106 et consécutivement celle du pignon menant 114 qui par l'intermédiaire de la chaîne 140 entraîne le plateau solidaire de la roue avant 20. Ce dispositif d'entraînement coopère avec la suspension avant 16 dans le sens où les tubes de fourche 60 coulissent dans les fourreaux 52 en fonction du profil du terrain sur lequel se déplace la moto, la jambe de force 40 maintenant constante la distance entre le boîtier relais 48 et l'arbre de sortie de boite 36, la fourche avant télescopique 54 s'inclinant plus ou moins par rapport au cadre 10 grâce à la platine supérieure de direction 26.  The motor drives the gearbox output shaft 36 which itself, thanks to a pinion, drives the chain of the first transmission member 42 in rotation, this chain in turn driving the driven pinion 100 and simultaneously the input element 94 cardan 96 with which it is secured. The input element 94 by means of the spider 102 rotating in the needle sleeves 104, causes the synchronous rotation of the output element 106 and consecutively that of the driving pinion 114 which by means of the chain 140 drives the plate secured to the front wheel 20. This drive device cooperates with the front suspension 16 in the direction where the fork tubes 60 slide in the sleeves 52 as a function of the profile of the terrain on which the motorcycle moves, the strut 40 now constant the distance between the relay box 48 and the gearbox output shaft 36, the telescopic front fork 54 tilting more or less relative to the frame 10 thanks to the upper steering plate 26.
Lors de ces mouvements la jambe de force 40 pivote autour du boîtier relais 48 grâce aux paliers 120 et 122. Cette position correspond à un déplacement de la motocyclette en droite ligne, si bien que les plans des pignons mené 100 et menant 114 sont parallèles, seule la jambe de force 40 oscillant autour du boîtier relais 48 et plus particulièrement du carter 76. During these movements, the strut 40 pivots around the relay box 48 by means of the bearings 120 and 122. This position corresponds to a displacement of the motorcycle in a straight line, so that the planes of the driven pinions 100 and leading 114 are parallel, only the strut 40 oscillating around the relay box 48 and more particularly of the casing 76.
Lorsque de plus la motocyclette se déplace en effectuant un virage, c'est-à-dire qu'il y a rotation du guidon 24, donc déplacement en rotation des tubes de fourches par rapport à l'axe 84, la jambe de force 40 reste dans l'axe longitudinal de la moto tout comme le carter 76 par contre les platines de fourche supérieure 70 et inférieure 72 ainsi que le support de pignon 108 subissent une rotation autour de l'axe 84, si bien que les pignons mené 100 et menant 114 ne sont plus dans des plans parallèles. La transmission est alors assurée par le cardan 96. Ainsi les éléments qui constituent le premier organe de transmission restent alignés entre eux et les éléments constituant le second organe de transmission 58 restent également alignés entre eux quelle que soit la position des tubes de fourche par rapport aux fourreaux et quel que soit l'angle de direction que fait la roue avant avec l'axe longitudinal de la moto.  When, moreover, the motorcycle moves by making a turn, that is to say that there is rotation of the handlebar 24, therefore displacement movement of the fork tubes relative to the axis 84, the strut 40 remains in the longitudinal axis of the motorcycle just like the casing 76 on the other hand the upper 70 and lower 72 fork plates as well as the pinion support 108 are rotated around the axis 84, so that the driven pinions 100 and leading 114 are no longer in parallel planes. Transmission is then ensured by the universal joint 96. Thus the elements which constitute the first transmission member remain aligned with one another and the elements constituting the second transmission member 58 also remain aligned with each other whatever the position of the fork tubes relative to to the sleeves and whatever the steering angle of the front wheel with the longitudinal axis of the motorcycle.
Un tel dispositif d'entraînement permet de simplifier la suspension avant et de recourir à un système télescopique simple tout en conservant une tension de chaîne constante et en supprimant tout tendeur compensateur de longueur de chaîne. Such a drive device makes it possible to simplify the front suspension and to use a simple telescopic system while maintaining a constant chain tension and eliminating any chain length compensating tensioner.

Claims

REVENDICATIONS
1. Dispositif d'entraînement de la roue avant (20) directrice d'une motocyclette à deux roues motrices au moyen d'un guidon (24) tournant dans une colonne de direction (22), comprenant une jambe de force (40) disposée entre la suspension (16) de la roue avant et les moyens moteurs (12), muni d'un premier organe de transmission (42), un second organe de transmission (58) disposé entre cette jambe de force (40) et la roue avant (20) caractérisé en ce que la suspension (16) de la roue avant est télescopique comprenant au moins un tube de fourche (60) articulé par rapport à la colonne de direction (22) et monté coulissant dans un fourreau (52) solidaire de l'axe (56) de la roue avant (20), des moyens amortisseurs (66) étant interposés entre ce tube et ce fourreau.  1. Device for driving the front wheel (20) driving a two-wheel drive motorcycle by means of a handlebar (24) rotating in a steering column (22), comprising a strut (40) disposed between the suspension (16) of the front wheel and the drive means (12), provided with a first transmission member (42), a second transmission member (58) disposed between this strut (40) and the wheel front (20) characterized in that the suspension (16) of the front wheel is telescopic comprising at least one fork tube (60) articulated with respect to the steering column (22) and mounted to slide in an integral sheath (52) from the axle (56) of the front wheel (20), damping means (66) being interposed between this tube and this sheath.
2. Dispositif selon la revendication 1 caractérisé en ce que la suspension (16) de la roue avant comprend deux tubes de fourches (60) et deux fourreaux (52), les deux ensembles tubes-fourreaux étant parallèles.  2. Device according to claim 1 characterized in that the suspension (16) of the front wheel comprises two fork tubes (60) and two sleeves (52), the two tube-sheath assemblies being parallel.
3. Dispositif selon la revendication 1 ou 2 caractérisé en ce qu'il comprend un boîtier relais (48) disposé entre les premier et second organe de transmission (42 et 58), supporté par deux platines de fourche supérieure (70) et inférieure (72) fixées sur au moins l'un des fourreaux (52).  3. Device according to claim 1 or 2 characterized in that it comprises a relay box (48) disposed between the first and second transmission member (42 and 58), supported by two upper fork plates (70) and lower ( 72) fixed on at least one of the sleeves (52).
4. Dispositif selon l'une quelconque des revendications 1, 2 ou 3 caractérisé en ce que le boîtier relais 48 est articulé par rapport aux platines autour d'un axe (84) sensiblement parallèle à l'un des fourreaux (52). 4. Device according to any one of claims 1, 2 or 3 characterized in that the relay box 48 is articulated relative to the plates around an axis (84) substantially parallel to one of the sleeves (52).
5. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le boîtier relais (48) comprend un carter (76) sensiblement cylindrique, l'axe longitudinal (78) de ce carter étant orienté perpendiculairement au fourreau. 5. Device according to any one of the preceding claims, characterized in that the relay box (48) comprises a housing (76) substantially cylindrical, the longitudinal axis (78) of this housing being oriented perpendicular to the sheath.
6. Dispositif selon la revendication 3, 4 ou 5 caractérisé en ce que le carter (76) du boîtier relais (48) comprend l 'élément d'entrée (94) d'un cardan (96) monté à rotation dans ce carter, l'élément d'entrée et le carter étant coaxiaux.  6. Device according to claim 3, 4 or 5 characterized in that the casing (76) of the relay box (48) comprises the input element (94) of a universal joint (96) rotatably mounted in this casing, the input element and the casing being coaxial.
7. Dispositif selon la revendication 6 caractérisé en ce que l'élément d'entrée (94) est solidaire d'un pignon mené (100) coaxial et monté à l'extérieur de cet élément, sur sa périphérie, le plan de rotation du pignon passant par l'axe de rotation (84) du boîtier relais (48) et par l'axe de rotation (78) de l'élément d'entrée (94) du cardan (96).  7. Device according to claim 6 characterized in that the input element (94) is integral with a driven pinion (100) coaxial and mounted outside of this element, on its periphery, the plane of rotation of the pinion passing through the axis of rotation (84) of the relay housing (48) and through the axis of rotation (78) of the input element (94) of the gimbal (96).
8. Dispositif selon l'une quelconque des revendications 3 à 7 caractérisé en ce qu'il comprend un support (108) muni d'un palier (110), fixé sur au moins l'une des platines de fourches (70, 72), dans lequel l'élément de sortie (106) du cardan (96) est monté à rotation.  8. Device according to any one of claims 3 to 7 characterized in that it comprises a support (108) provided with a bearing (110), fixed on at least one of the fork plates (70, 72) , wherein the output element (106) of the gimbal (96) is rotatably mounted.
9. Dispositif selon la revendication 8 caractérisé en ce que l'élément de sortie (106) du cardan (96) comprend un pignon menant (114) monté de façon coaxiale.  9. Device according to claim 8 characterized in that the output element (106) of the gimbal (96) comprises a driving pinion (114) mounted coaxially.
10. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que l'extrémité avant (46) de la jambe de force (40) est montée à rotation autour du carter (76) du bσîtier relais (48) coaxialement à ce boîtier grâce à des paliers (120 et 122), l'axe longitudinal de la jambe de force étant perpendiculaire à l'axe de rotation (78). 10. Device according to any one of the preceding claims, characterized in that the front end (46) of the strut (40) is rotatably mounted around the casing (76) of the relay box (48) coaxially with this. housing thanks at bearings (120 and 122), the longitudinal axis of the strut being perpendicular to the axis of rotation (78).
11. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le pignon mené (100) coopère avec le premier organe de transmission (42) entraîné par les moyens moteurs (12) et en ce que le pignon menant (114) coopère avec le second organe de transmission (58) qui entraîne la roue avant (20).  11. Device according to any one of the preceding claims, characterized in that the driven pinion (100) cooperates with the first transmission member (42) driven by the driving means (12) and in that the driving pinion (114) cooperates with the second transmission member (58) which drives the front wheel (20).
12. Motocyclette à deux roues motrices comprenant un dispositif d'entraînement selon l'une quelconque des revendications 1 à 11.  12. Two-wheel drive motorcycle comprising a drive device according to any one of claims 1 to 11.
EP90906246A 1989-03-29 1990-03-29 Device for driving the front wheel of a two-wheel drive motorcycle, and motorcycle associated Withdrawn EP0465582A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8904226 1989-03-29
FR8904226A FR2645107A1 (en) 1989-03-29 1989-03-29 MOTORCYCLE WITH ONE OR TWO DRIVE WHEELS AND FRONT PENDULUM TELESCOPIC FORK

Publications (1)

Publication Number Publication Date
EP0465582A1 true EP0465582A1 (en) 1992-01-15

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EP90906246A Withdrawn EP0465582A1 (en) 1989-03-29 1990-03-29 Device for driving the front wheel of a two-wheel drive motorcycle, and motorcycle associated

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EP (1) EP0465582A1 (en)
JP (1) JPH04505597A (en)
FR (1) FR2645107A1 (en)
WO (1) WO1990011218A1 (en)

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Publication number Priority date Publication date Assignee Title
DE4301890A1 (en) * 1993-01-14 1994-07-21 Egon Nehrke wheel
US8973690B2 (en) 2010-10-04 2015-03-10 W. Morrision Consulting Group, Inc. Front wheel energy recovery system
TWM435409U (en) * 2011-03-04 2012-08-11 Suzhou Eagle Elec Vehicle Mfg Landing gear of the two-wheeled vehicle
CN102653290B (en) * 2011-03-04 2014-06-04 苏州益高电动车辆制造有限公司 Undercarriage of two-wheeler

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FR1000493A (en) * 1946-02-14 1952-02-12 Expl Des Brevets M G D Soc Pou Improvements to vehicles such as motorcycles, scooters, etc. with driving and steering wheels
US3045772A (en) * 1959-02-17 1962-07-24 Theodore R Nicolai Drive for motor bikes
GB1035458A (en) * 1964-04-22 1966-07-06 Peter William Bothwell Improved suspension and steering system for road vehicles
GB1284821A (en) * 1970-03-11 1972-08-09 Bothwell P W Improvements relating to two-wheeled vehicles
GB1588267A (en) * 1976-09-22 1981-04-23 Kayaba Industry Co Ltd Motorcycle suspension
FR2545059A1 (en) * 1983-04-27 1984-11-02 Fauvarque Gervais Two-wheeled vehicle with a central engine and driving front wheel
FR2574744A1 (en) * 1984-12-17 1986-06-20 Valat Eric Device making it possible to drive the front wheel of two- or three-wheeled land vehicles with or without an engine
FR2579950A1 (en) * 1985-04-04 1986-10-10 Decouroux Robert Device for transmission to the front wheel for a motor bike with rear wheel drive or otherwise
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WO1990011218A1 (en) 1990-10-04
JPH04505597A (en) 1992-10-01

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