WO2007132087A1 - System deformable by centrifugal force - Google Patents

System deformable by centrifugal force Download PDF

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Publication number
WO2007132087A1
WO2007132087A1 PCT/FR2007/000802 FR2007000802W WO2007132087A1 WO 2007132087 A1 WO2007132087 A1 WO 2007132087A1 FR 2007000802 W FR2007000802 W FR 2007000802W WO 2007132087 A1 WO2007132087 A1 WO 2007132087A1
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WO
WIPO (PCT)
Prior art keywords
weights
series
deformable
plate
deformable system
Prior art date
Application number
PCT/FR2007/000802
Other languages
French (fr)
Inventor
Jean-Paul Lenoble
Original Assignee
Mobiky
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 Mobiky filed Critical Mobiky
Priority to EP07731443A priority Critical patent/EP2018315A1/en
Publication of WO2007132087A1 publication Critical patent/WO2007132087A1/en

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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
    • B62M11/00—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels
    • B62M11/04—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio
    • B62M11/14—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears
    • B62M11/16—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with planetary gears built in, or adjacent to, the ground-wheel hub
    • 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
    • B62M11/00—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels
    • B62M11/04—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio

Definitions

  • the present invention relates to a deformable system by a centrifugal force used in particular in an automatic gearshift device such as that used on a bicycle.
  • the invention also relates to a transmission device equipped with such a deformable system.
  • a transmission device in particular for a bicycle, comprising leading and driven gears defining transmission ratios.
  • This transmission device comprises centrifugal force deformable systems which are associated with some of these gears to control the engagement of a gear when the bicycle equipped with the transmission device reaches a predetermined speed.
  • the deformable systems described in these documents comprise a turntable around a sensitive axis and equipped with four flyweights.
  • the weights are connected to the plate by a hinge axis parallel to the sensitive axis to pivot between a close position in which the weights are elastically biased by a return member and a position apart when the platen has a speed of rotation such that the centrifugal force has on the weights an action surpassing the action of the return member.
  • pawls are interposed between a driving element and a driven element of the transmission and are controlled by the deformable system to couple them in rotation during its passage from one position to the other.
  • the passage of the weights from one position to another being determined by the centrifugal force exerted on them and which depends on the speed of rotation of the plate, such a system is sometimes called mechanical tachometer.
  • Each weight comprises a massive part constituting the bulk of the mass of the weight and at least one connecting part to one of the other masses.
  • the link portion includes a lever arm extending from the hinge opposite the solid portion.
  • a system that can be deformed by a centrifugal force, comprising a turntable rotatable about a sensitive axis and magnets, each connected to the plate by an articulation of axis parallel to the sensitive axis for pivoting between a close position in which the weights are recalled by an elastic member and a position apart when the platen has such a speed that the centrifugal force has on the weights an action greater than an action of the elastic member, each mass-burbot having a solid portion and at least one connecting portion to an adjacent flyweight, the solid portion and each connecting portion lying on the same side of a radius passing through the sensitive axis and articula- tion.
  • the return member comprises a spring connecting the weights two by two.
  • each flyweight has an annular sector shape.
  • the weights substantially form a crown.
  • the balancing of the system is then optimal.
  • the deformable system comprises a first and a second series of at least two weights, the first series being superimposed on the second series and the weights of the first series being mounted on the plate to pivot in a direction opposite to the direction of pivoting of the weights of the second series, each weight of the first series having connecting portions facing the connecting portions of two adjacent weights of the second series, the connecting portions of the weights of the first series and the connecting portions of the weights of the second series comprising reciprocal mutual guide reliefs.
  • This embodiment is simple and can be realized for a relatively small cost.
  • the invention also relates to a transmission device comprising a driving element connected to an element driven by an epicyclic gear comprising a planet carrier and a coaxial sun gear, the planet carrier being equipped with satellites meshing on a fixed central axis and on the sun gear, freewheel pawls being mounted between the driving element and the planet and controlled pawls being mounted on the movable driving element between a position engaged with the planet carrier and a disengaged position, a system de- formable being fixedly mounted in the driven element opposite the ratchets controlled so that the weights are in contact with the ratchets controlled and allow the passage of these from their disengaged position to their engaged position when they are moved from their close position towards their discarded position.
  • FIG. 1 is a schematic view in elevation of a first series of flyweights of a deformable system in accordance with the invention, the flyweights being in the separated position,
  • FIG. 2 is a view similar to FIG. 1 of a second series of flyweights of this deformable system, the flyweights being in the separated position,
  • FIG. 3 is a schematic view in elevation of the deformable system according to the invention, the flyweights being in the separated position,
  • FIG. 4 is a schematic view in elevation of this deformable system, the weights being in close position
  • FIG. 5 is a partial diagrammatic cross-sectional view of this deformable system
  • FIG. 6 is a schematic cross-sectional view of a transmission device with a change of automatic ratio differential type.
  • the deformable system according to the invention comprises a plate 2 comprising two coaxial rings 3.1, 3.2 and kept spaced by spacers 4.
  • the crowns 3 have a central axis 5 (perpendicular to the plane of the drawings) intended to constitute the sensitive axis of the deformable system 1.
  • a series of three flyweights generally designated 6.1 is mounted on the plate 2 by pins 7.1 and a series of three flyweights generally designated 6.2 is mounted on the plate 2 by pins 7.2 so that the weights 6.1, 6.2 s' extend between crowns 3.1, 3.2.
  • the pins 7.1, 7.2 are of axis parallel to the central axis 5 and are mounted on the weights 6.1, 6.2 so that the weights 6.1, 6.2 rotate in opposite directions when subjected to a centrifugal force resulting from the rotation of the plate 2 about the central axis 5.
  • the pins 7.1 are substantially at 120 ° from each other, the pins 7.2 are substantially at 120 ° from each other and the pins 7.1 are offset by about 60 ° compared to the pivots 7.2.
  • Each flyweight 6.1, 6.2 has substantially the shape of an annular segment forming a solid portion 8.1, 8.2 having an end 9.1, 9.2 on which is mounted the pivot 7.1, 7.2 and opposite a free end 10.1, 10.2.
  • the annular segment extends about 120 ° so that the weights 6.1, 6.2 of a series form substantially a ring.
  • the weights 6.1, 6.2 are mounted on the plate 2 so that the direction of orientation of the ends 9.1, 10.1 and the direction of orientation of the ends 9.2, 10.2 are opposite.
  • Each flyweight 6.1 has a portion close to its end 9.1 extending facing a corresponding portion of a first flyweight 6.2 ' and a portion adjacent its end 10.1 extending facing a corresponding portion of a second flyweight 6.2 adjacent to the first such that each flyweight 6.1 straddles a portion of two adjacent flyweights 6.2.
  • each weight 6.2 a groove 11 in an arc of a circle is formed in the portion of the masking portion. sive 8.2 adjacent to the end 9.2 and a groove 12 arcuate circle of greater length is formed in the portion of the solid portion 8.2 adjacent the free end 10.2.
  • the grooves 11, 12 are centered on axes parallel to the central axis 5.
  • a lug 13 extends in lateral projection of the portion of the solid portion 8.1 adjacent to the end 9.1 to be received in the groove 11 of a first flyweight 6.2 and a lug 14 extends in lateral projection of the portion of the solid portion 8.1 adjacent the free end 10.1 to be received in the groove 12 of a second flyweight 6.2 adjacent to the first.
  • the two sets of weights 6.1, 6.2 are thus superimposed and the grooves 11, 12 and the lugs 13, 14 form reciprocal mutual guide reliefs constituting connecting portions of the weights 6.1, 6.2 to each other.
  • the reciprocal mutual guide reliefs comprise at least one guide flank laterally delimiting the groove 11, 12 and a lug 13, 14 projecting laterally to slide along the guide flank.
  • the connecting parts are an integral part of the massive parts
  • each weight therefore extend on the same side of a radius R crossing the central axis 5 and the axis of the pivots 7.1, 7.2.
  • the return springs 15 are therefore three in number and extend at least partially in recesses 16.1, 16.2 arranged next to the solid parts 8.1, 8.2 of the weights 6.1, 6.2.
  • the weights 6. 1, 6. 2 can pivot between a close position (shown in Figure 4) and a remote position (shown in Figure 3).
  • the return springs 15 exert on the flyweights 6. 1,
  • the weights 6. 1, 6. 2 are brought to the discarded position when the plate 2 is rotated about the central axis 5 and that the centrifugal force which is exerted on the 6.1, 6.2 has an action surpassing the action of the return springs 15.
  • the deformable system of the invention is used for example to act on pawls solidarisant in rotation of the first and second coaxial elements of the transmission chain.
  • the pawls are fixed on the first of these elements around the second element which is provided on the outside with reliefs, such as teeth, to cooperate with the pawls.
  • the deformable system is mounted around the pawls so that the weights release the pawl to allow its engagement in the reliefs of the second element during their passage from their close position to their spaced apart position.
  • the mounting of such a deformable system in a gear change transmission device is similar to that shown in particular in EP-A-0 758 970.
  • the weights whatever their positions, define a substantially continuous circular internal contour.
  • a differential transmission or planetary gear
  • the pawls would be secured to a rotating support movable relative to the plate.
  • Such a differential type transmission device is shown in FIG. has three reports, but only the passage between the first two reports (named first and second) will be detailed here to simplify the description. It goes without saying that this device can have more reports and include one or more deformable systems.
  • This device is housed in the hub 50 of a bicycle wheel mounted, in known manner, for pivoting on a fixed axis 51.
  • the fixed axis 51 is externally provided with teeth 52 on which meshes 53 are fitted to rotate on a planet carrier
  • a planetary gear 55 is mounted to pivot on the planet carrier 54 and has an internal toothing meshing with the satellites 53.
  • a drive core 56 is mounted to pivot in the hub 50 and at one end of the carrier. 54.
  • the drive core 56 is integral with a pinion 57 meshing on the transmission chain of the bicycle.
  • a deformable system 1 is fixedly mounted in the hub 50 opposite pawls 58, said second pawls, mounted on the drive core 56 to be movable between a disengaged position (shown in Figure 6) and an engaged position in which they co-operate with wolf teeth 59 provided externally on said end of the planet carrier 54.
  • Pawls 60 said ratchets first, are mounted between the drive core 56 and the sun gear.
  • the pawls 60 are freewheeling pawls 55 to rotate them as long as the drive core 56 has a higher rotational speed than the sun gear 55.
  • the pawls 60 are free wheel pawls.
  • the deformable system 1 does not turn at the same speed as the drive core 56.
  • the circular internal contour substantially continuous weights 6.1, 6.2 allows to always have a weight against a pawl 58.
  • the invention is not limited to the embodiment described and can be made to implement variants without departing the the scope of the invention as defined by the claims.
  • the system may comprise weights, not superimposed and disposed on either side of the sensitive axis, having ends articulated to the plate for pivoting in opposite directions and opposite ends connected to each other by a knee joint forming the connecting part.
  • the reciprocal mutual guide reliefs may also include a rib projecting from the flyweights.
  • the flyweights can be rotatably mounted on axles connecting the rings 3.1, 3.2 or clamped on axles having rotatably connected ends to the rings 3.1, 3.2.
  • the weights may have a shape different from that described.
  • the use of six weights is advantageous because it allows a better distribution of the masses and improves the compensation of parasitic forces. It is nevertheless possible to modify the number of weights. In this way, it is possible to produce a deformable system with four weights.
  • the return member may be a spring interposed between a flyweight and the plate. Different types of return members are usable including the tension springs or compression.
  • the structure of the transmission device may be different from that described.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)

Abstract

The present invention concerns a system that is deformable by a centrifugal force, comprising a plate (2) able to rotate about a sensitive axis (5) and at least two weights (6) connected to the plate by a recurrent articulation with its axis parallel to the sensitive axis in order to pivot between a close position in which the weights are returned by an elastic member (15) and a separated position when the plate has a speed such that the centrifugal force has an effect on the weights greater than the effect of the elastic member, each weight comprising a solid part (8) and a part (11, 12, 13, 14) connecting to the other weight, the solid part and the connecting part being situated on the same side of a radius passing through the sensitive axis and the articulation. Another object of the invention is a transmission device equipped with such a system.

Description

Système déformable par force centrifugeSystem deformable by centrifugal force
La présente invention concerne un système déformable par une force centrifuge utilisable notamment dans un dispositif automatique de changement de vitesse tel que celui utilisé sur une bicyclette. L'invention a éga- lement pour objet un dispositif de transmission équipé d'un tel système déformable.The present invention relates to a deformable system by a centrifugal force used in particular in an automatic gearshift device such as that used on a bicycle. The invention also relates to a transmission device equipped with such a deformable system.
ARRIERE PLAN DE L'INVENTIONBACKGROUND OF THE INVENTION
II est connu des documents FR-A-2 711 351 et EP- A-O 758 970 un dispositif de transmission, notamment pour bicyclette, comprenant des pignons meneurs et menés définissant des rapports de transmission. Ce dispositif de transmission comporte des systèmes déformables par la force centrifuge qui sont associés à certains de ces pignons pour commander l'enclenchement d'un rapport lorsque la bicyclette équipée du dispositif de transmission atteint une vitesse prédéterminée.It is known from FR-A-2 711 351 and EP-A-0 758 970 a transmission device, in particular for a bicycle, comprising leading and driven gears defining transmission ratios. This transmission device comprises centrifugal force deformable systems which are associated with some of these gears to control the engagement of a gear when the bicycle equipped with the transmission device reaches a predetermined speed.
Les systèmes déformables décrits dans ces documents comprennent une platine rotative autour d'un axe sensible et équipée de quatre masselottes. Les masselot- tes sont reliées à la platine par une articulation d'axe parallèle à l'axe sensible pour pivoter entre une position rapprochée dans laquelle les masselottes sont rappelées élastiquement par un organe de rappel et une position écartée lorsque la platine a une vitesse de rotation telle que la force centrifuge a sur les masselottes une action surpassant l'action de l'organe de rappel. Dans le dispositif de transmission, des cliquets sont interposés entre un élément menant et un élément mené de la transmission et sont commandés par le système déformable pour accoupler ceux-ci en rotation lors de son passage d'une position à l'autre. Le passage des masselottes d'une position à l'autre étant déterminé par la force centrifuge qui s'exerce sur celles-ci et qui dépend de la vitesse de rotation de la platine, un tel système est parfois appelé tachymètre mécanique.The deformable systems described in these documents comprise a turntable around a sensitive axis and equipped with four flyweights. The weights are connected to the plate by a hinge axis parallel to the sensitive axis to pivot between a close position in which the weights are elastically biased by a return member and a position apart when the platen has a speed of rotation such that the centrifugal force has on the weights an action surpassing the action of the return member. In the transmission device, pawls are interposed between a driving element and a driven element of the transmission and are controlled by the deformable system to couple them in rotation during its passage from one position to the other. The passage of the weights from one position to another being determined by the centrifugal force exerted on them and which depends on the speed of rotation of the plate, such a system is sometimes called mechanical tachometer.
Chaque masselotte comprend une partie massive constituant l'essentiel de la masse de la masselotte et au moins une partie de liaison à l'une des autres masse- lottes. La partie de liaison comprend un bras de levier s 'étendant depuis l'articulation à l'opposé de la partie massive. Un inconvénient de cette construction est que la force centrifuge s'exerce à la fois sur la partie massive et sur la partie de liaison en tendant à faire pivoter ces parties dans deux sens opposés. L'application de la force centrifuge sur la partie de liaison entraîne donc une résistance au pivotement de la partie massive qui Ii- mite la sensibilité du système déformable et la précision du changement de vitesse.Each weight comprises a massive part constituting the bulk of the mass of the weight and at least one connecting part to one of the other masses. The link portion includes a lever arm extending from the hinge opposite the solid portion. A disadvantage of this construction is that the centrifugal force is exerted both on the solid part and on the connecting part tending to rotate these parts in two opposite directions. The application of the centrifugal force on the connecting part thus causes a resistance to pivoting of the solid part which limits the sensitivity of the deformable system and the precision of the gear change.
OBJET DE L'INVENTIONOBJECT OF THE INVENTION
II serait donc intéressant de disposer d'un système déformable ayant une sensibilité améliorée. RESUME DE L'INVENTIONIt would therefore be advantageous to have a deformable system having improved sensitivity. SUMMARY OF THE INVENTION
A cet effet, on prévoit, selon l'invention, un système déformable par une force centrifuge, comprenant une platine rotative autour d'un axe sensible et des mas- selottes reliées chacune à la platine par une articula- tion d'axe parallèle à l'axe sensible pour pivoter entre une position rapprochée dans laquelle les masselottes sont rappelées par un organe élastique et une position écartée lorsque la platine a une vitesse telle que la force centrifuge a sur les masselottes une action supé- rieure à une action de l'organe élastique, chaque masse- lotte comportant une partie massive et au moins une partie de liaison à une masselotte adjacente, la partie massive et chaque partie de liaison se trouvant d'un même côté d'un rayon passant par l'axe sensible et l'articula- tion.For this purpose, according to the invention, provision is made for a system that can be deformed by a centrifugal force, comprising a turntable rotatable about a sensitive axis and magnets, each connected to the plate by an articulation of axis parallel to the sensitive axis for pivoting between a close position in which the weights are recalled by an elastic member and a position apart when the platen has such a speed that the centrifugal force has on the weights an action greater than an action of the elastic member, each mass-burbot having a solid portion and at least one connecting portion to an adjacent flyweight, the solid portion and each connecting portion lying on the same side of a radius passing through the sensitive axis and articula- tion.
Comme chaque partie de liaison et la partie massive se trouvent du même côté de l'articulation, toutes les masses de la masselotte sont situées de ce côté du rayon et la force centrifuge n'agit que d'un côté de l'articulation. L'action de la force centrifuge sur ces deux parties a ainsi un effet unique tendant à faire pi¬ voter la masselotte dans un seul sens. Avantageusement, l'organe de rappel comprend un ressort reliant les masselottes deux à deux.As each connecting part and the solid part are on the same side of the joint, all the masses of the weight are located on this side of the radius and the centrifugal force acts only on one side of the joint. The action of the centrifugal force on both sides and has a unique effect tending to vote pi ¬ the feeder in one direction. Advantageously, the return member comprises a spring connecting the weights two by two.
Le fonctionnement du système est alors amélioré en diminuant les frottements. De préférence, chaque masselotte a une forme de secteur annulaire.The operation of the system is then improved by reducing the friction. Preferably, each flyweight has an annular sector shape.
Ceci permet d'obtenir un système qui soit relativement compact tout en ayant des masselottes de masse relativement importante. Avantageusement alors, les masselottes forment sensiblement une couronne.This makes it possible to obtain a system that is relatively compact while having weights of relatively large mass. Advantageously then, the weights substantially form a crown.
L'équilibrage du système est alors optimal.The balancing of the system is then optimal.
Selon un mode de réalisation particulier, le système déformable comprend une première et une deuxième sé- ries d'au moins deux masselottes, la première série étant superposée à la deuxième série et les masselottes de la première série étant montées sur la platine pour pivoter dans un sens opposé au sens de pivotement des masselottes de la deuxième série, chaque masselotte de la première série ayant des parties de liaison en regard des parties de liaison de deux masselottes adjacentes de la deuxième série, les parties de liaison des masselottes de la première série et les parties de liaison des masselottes de la deuxième série comportant des reliefs réciproques de guidage mutuel.According to a particular embodiment, the deformable system comprises a first and a second series of at least two weights, the first series being superimposed on the second series and the weights of the first series being mounted on the plate to pivot in a direction opposite to the direction of pivoting of the weights of the second series, each weight of the first series having connecting portions facing the connecting portions of two adjacent weights of the second series, the connecting portions of the weights of the first series and the connecting portions of the weights of the second series comprising reciprocal mutual guide reliefs.
Ce mode de réalisation est simple et peut être réalisé pour un coût relativement réduit.This embodiment is simple and can be realized for a relatively small cost.
L'invention a également pour objet un dispositif de transmission comprenant un élément menant relié à un élément mené par un train épicycloïdal comportant un porte-satellites et un planétaire coaxiaux, le porte- satellites étant équipé de satellites engrenant sur un axe central fixe et sur le planétaire, des cliquets de roue libre étant montés entre l'élément menant et le pla- nétaire et des cliquets commandés étant montés sur l'élément menant mobiles entre une position embrayée avec le porte-satellites et une position débrayée, un système dé- formable étant monté fixe dans l'élément mené en regard des cliquets commandés de telle manière que les masselot- tes soient au contact des cliquets commandés et permettent le passage de ceux-ci de leur position débrayée à leur position embrayée lorsqu'elles sont déplacées de leur position rapprochée vers leur position écartée.The invention also relates to a transmission device comprising a driving element connected to an element driven by an epicyclic gear comprising a planet carrier and a coaxial sun gear, the planet carrier being equipped with satellites meshing on a fixed central axis and on the sun gear, freewheel pawls being mounted between the driving element and the planet and controlled pawls being mounted on the movable driving element between a position engaged with the planet carrier and a disengaged position, a system de- formable being fixedly mounted in the driven element opposite the ratchets controlled so that the weights are in contact with the ratchets controlled and allow the passage of these from their disengaged position to their engaged position when they are moved from their close position towards their discarded position.
D'autres caractéristiques et avantages de la description ressortiront à la lecture de la description qui suit d'un mode de réalisation particulier non limitatif de l'invention.Other features and advantages of the description will become apparent on reading the following description of a particular non-limiting embodiment of the invention.
BREVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS
II sera fait référence aux dessins annexés, parmi lesquels :Reference will be made to the appended drawings, among which:
- la figure 1 est une vue schématique en éléva- tion d'une première série de masselottes d'un système dé- formable conforme à l'invention, les masselottes étant en position écartée,FIG. 1 is a schematic view in elevation of a first series of flyweights of a deformable system in accordance with the invention, the flyweights being in the separated position,
- la figure 2 est une vue analogue à la figure 1 d'une deuxième série de masselottes de ce système défor- mable, les masselottes étant en position écartée,FIG. 2 is a view similar to FIG. 1 of a second series of flyweights of this deformable system, the flyweights being in the separated position,
- la figure 3 est une vue schématique en élévation du système déformable conforme à l'invention, les masselottes étant en position écartée,FIG. 3 is a schematic view in elevation of the deformable system according to the invention, the flyweights being in the separated position,
- la figure 4 est une vue schématique en éléva- tion de ce système déformable, les masselottes étant en position rapprochée,FIG. 4 is a schematic view in elevation of this deformable system, the weights being in close position,
- la figure 5 est une vue schématique partielle en coupe transversale de ce système déformable,FIG. 5 is a partial diagrammatic cross-sectional view of this deformable system,
- la figure 6 est une semi vue schématique en coupe d'un dispositif de transmission à changement de rapport automatique de type différentiel.- Figure 6 is a schematic cross-sectional view of a transmission device with a change of automatic ratio differential type.
DESCRIPTION DETAILLEE DE L'INVENTIONDETAILED DESCRIPTION OF THE INVENTION
En référence aux figures, le système déformable conforme à l'invention, généralement désigné en 1, com- prend une platine 2 comportant deux couronnes 3.1, 3.2 coaxiales et maintenues espacées par des entretoises 4.With reference to the figures, the deformable system according to the invention, generally designated 1, comprises a plate 2 comprising two coaxial rings 3.1, 3.2 and kept spaced by spacers 4.
Les couronnes 3 ont un axe central 5 (perpendiculaire au plan des dessins) destiné à constituer l'axe sensible du système déformable 1.The crowns 3 have a central axis 5 (perpendicular to the plane of the drawings) intended to constitute the sensitive axis of the deformable system 1.
Une série de trois masselottes généralement désignées en 6.1 est montées sur la platine 2 par des pivots 7.1 et une série de trois masselottes généralement désignées en 6.2 est montée sur la platine 2 par des pivots 7.2 de telle manière que les masselottes 6.1, 6.2 s'étendent entre les couronnes 3.1, 3.2. Les pivots 7.1, 7.2 sont d'axe parallèle à l'axe central 5 et sont montés sur les masselottes 6.1, 6.2 de telle manière que les masselottes 6.1, 6.2 pivotent dans des sens opposés lorsqu'elles sont soumises à une force centrifuge résultant de la rotation de la platine 2 autour de l'axe central 5. Les pivots 7.1 sont sensiblement à 120° les uns des autres, les pivots 7.2 sont sensiblement à 120° les uns des autres et les pivots 7.1 sont décalés d'environ 60° par rapport aux pivots 7.2.A series of three flyweights generally designated 6.1 is mounted on the plate 2 by pins 7.1 and a series of three flyweights generally designated 6.2 is mounted on the plate 2 by pins 7.2 so that the weights 6.1, 6.2 s' extend between crowns 3.1, 3.2. The pins 7.1, 7.2 are of axis parallel to the central axis 5 and are mounted on the weights 6.1, 6.2 so that the weights 6.1, 6.2 rotate in opposite directions when subjected to a centrifugal force resulting from the rotation of the plate 2 about the central axis 5. The pins 7.1 are substantially at 120 ° from each other, the pins 7.2 are substantially at 120 ° from each other and the pins 7.1 are offset by about 60 ° compared to the pivots 7.2.
Chaque masselotte 6.1, 6.2 a sensiblement la forme d'un segment annulaire formant une partie massive 8.1, 8.2 ayant une extrémité 9.1, 9.2 sur laquelle est monté le pivot 7.1, 7.2 et à l'opposé une extrémité libre 10.1, 10.2. Le segment annulaire s'étend sur 120° environ de sorte que les masselottes 6.1, 6.2 d'une série forment sensiblement un anneau. Les masselottes 6.1, 6.2 sont montées sur la platine 2 de telle manière que le sens d'orientation des extrémités 9.1, 10.1 et le sens d'orientation des extrémités 9.2, 10.2 soient opposés. Chaque masselotte 6.1 a une portion voisine de son extrémité 9.1 s ' étendant en regard d'une portion correspon- dante d'une première masselotte 6.2' et une portion voisine de son extrémité 10.1 s ' étendant en regard d'une portion correspondante d'une deuxième masselotte 6.2 adjacente à la première de sorte que chaque masselotte 6.1 s'étend à cheval sur une partie de deux masselottes 6.2 adjacentes.Each flyweight 6.1, 6.2 has substantially the shape of an annular segment forming a solid portion 8.1, 8.2 having an end 9.1, 9.2 on which is mounted the pivot 7.1, 7.2 and opposite a free end 10.1, 10.2. The annular segment extends about 120 ° so that the weights 6.1, 6.2 of a series form substantially a ring. The weights 6.1, 6.2 are mounted on the plate 2 so that the direction of orientation of the ends 9.1, 10.1 and the direction of orientation of the ends 9.2, 10.2 are opposite. Each flyweight 6.1 has a portion close to its end 9.1 extending facing a corresponding portion of a first flyweight 6.2 ' and a portion adjacent its end 10.1 extending facing a corresponding portion of a second flyweight 6.2 adjacent to the first such that each flyweight 6.1 straddles a portion of two adjacent flyweights 6.2.
Dans chaque masselotte 6.2, une rainure 11 en arc de cercle est ménagée dans la portion de la partie mas- sive 8.2 voisine de l 'extrémité 9.2 et une rainure 12 en arc de cercle de plus grande longueur est ménagée dans la portion de la partie massive 8.2 voisine de 1 ' extrémité libre 10.2 . Les rainures 11, 12 sont centrées sur des axes parallèles à l ' axe central 5. Dans chaque masselotte 6.1, un ergot 13 s ' étend en saillie latérale de la portion de la partie massive 8.1 voisine de l ' extrémité 9.1 pour être reçu dans la rainure 11 d'une première masselotte 6.2 et un ergot 14 s 'étend en saillie latérale de la portion de la partie massive 8.1 voisine de 1 ' extrémité libre 10.1 pour être reçu dans la rainure 12 d'une deuxième masselotte 6.2 adjacente à la première.In each weight 6.2, a groove 11 in an arc of a circle is formed in the portion of the masking portion. sive 8.2 adjacent to the end 9.2 and a groove 12 arcuate circle of greater length is formed in the portion of the solid portion 8.2 adjacent the free end 10.2. The grooves 11, 12 are centered on axes parallel to the central axis 5. In each flyweight 6.1, a lug 13 extends in lateral projection of the portion of the solid portion 8.1 adjacent to the end 9.1 to be received in the groove 11 of a first flyweight 6.2 and a lug 14 extends in lateral projection of the portion of the solid portion 8.1 adjacent the free end 10.1 to be received in the groove 12 of a second flyweight 6.2 adjacent to the first.
Les deux séries de masselottes 6.1, 6.2 sont ainsi superposées et les rainures 11, 12 et les ergots 13 , 14 forment des reliefs réciproques de guidage mutuel constituant des parties de liaison des masselottes 6.1, 6.2 les unes aux autres . On a ainsi un système déformable dans lequel les reliefs réciproques de guidage mutuel comportent au moins un flanc de guidage délimitant latéralement la rainure 11, 12 et un ergot 13 , 14 en saillie latérale pour coulisser le long du flanc de guidage . On notera qu' ici les parties de liaison font partie intégrante des parties massivesThe two sets of weights 6.1, 6.2 are thus superimposed and the grooves 11, 12 and the lugs 13, 14 form reciprocal mutual guide reliefs constituting connecting portions of the weights 6.1, 6.2 to each other. There is thus a deformable system in which the reciprocal mutual guide reliefs comprise at least one guide flank laterally delimiting the groove 11, 12 and a lug 13, 14 projecting laterally to slide along the guide flank. Note that here the connecting parts are an integral part of the massive parts
8.1, 8.2. Les parties de liaison et la partie massive de chaque masselotte s ' étendent donc d'un même côté d'un rayon R croisant l ' axe central 5 et l ' axe des pivots 7.1, 7.2.8.1, 8.2. The connecting parts and the solid part of each weight therefore extend on the same side of a radius R crossing the central axis 5 and the axis of the pivots 7.1, 7.2.
Entre chaque paire de masselottes 6.1, 6.2 situées de part et d' autre de l 'axe central 5 s ' étend un ressort de rappel 15 dont les extrémités sont reliées respectivement à la masselotteBetween each pair of weights 6.1, 6.2 located on either side of the central axis 5 extends a return spring 15 whose ends are respectively connected to the flyweight
6.1 et à la masselotte 6.2 au voisinage de leur extrémité 9.1,6.1 and the flyweight 6.2 near their end 9.1,
9.2. Les ressorts de rappel 15 sont donc au nombre de trois et s 'étendent au moins partiellement dans des évidements 16.1, 16.2 ménagés en regard dans les parties massives 8.1, 8.2 des masselottes 6.1, 6.2 .9.2. The return springs 15 are therefore three in number and extend at least partially in recesses 16.1, 16.2 arranged next to the solid parts 8.1, 8.2 of the weights 6.1, 6.2.
Les masselottes 6 . 1 , 6 . 2 peuvent pivoter entre une position rapprochée (représentée à la figure 4 ) et une position écartée (représentée à la figure 3 ) . Les ressorts de rappel 15 exercent sur les masselottes 6 . 1 ,The weights 6. 1, 6. 2 can pivot between a close position (shown in Figure 4) and a remote position (shown in Figure 3). The return springs 15 exert on the flyweights 6. 1,
6 . 2 un effort de maintien en position rapprochée . Les masselottes 6 . 1 , 6 . 2 sont amenées en position écartée lorsque la platine 2 est en rotation autour de l'axe central 5 et que la force centrifuge qui s'exerce sur les raasselottes 6.1, 6.2 a une action surpassant l'action des ressorts de rappel 15. On peut prévoir un réglage de la précontrainte des ressorts (et donc de l'action de ceux-ci sur les mas- selottes 6.1, 6.2), par exemple en fixant les extrémités des ressorts sur les masselottes au moyen d'excentriques ou tout autre système de réglage permettant une modifica- tion de la distance séparant les points de fixation des extrémités du ressort .6. 2 a maintenance effort in close position. The weights 6. 1, 6. 2 are brought to the discarded position when the plate 2 is rotated about the central axis 5 and that the centrifugal force which is exerted on the 6.1, 6.2 has an action surpassing the action of the return springs 15. can be provided a preload adjustment springs (and thus the action of these on the 6.1, 6.2), for example by fixing the ends of the springs on the flyweights by means of eccentrics or any other adjustment system allowing a modification the distance between the fixing points of the ends of the spring.
Dans un dispositif de transmission à changement de rapport, le système déformable de l'invention est utilisé par exemple pour agir sur des cliquets solidarisant en rotation des premier et deuxième éléments coaxiaux de la chaîne de transmission. Les cliquets sont fixés sur le premier de ces éléments autour du deuxième élément qui est pourvu extérieurement de reliefs, tels que des dents, pour coopérer avec les cliquets. Le système déformable est monté autour des cliquets de telle manière que les masselottes libèrent le cliquet pour permettre son engagement dans les reliefs du deuxième élément lors de leur passage de leur position rapprochée à leur position écartée. Le montage d'un tel système déformable dans un dispositif de transmission à changement de rapport est analogue à celui figurant notamment dans le document EP- A-O 758 970.In a gear transmission device, the deformable system of the invention is used for example to act on pawls solidarisant in rotation of the first and second coaxial elements of the transmission chain. The pawls are fixed on the first of these elements around the second element which is provided on the outside with reliefs, such as teeth, to cooperate with the pawls. The deformable system is mounted around the pawls so that the weights release the pawl to allow its engagement in the reliefs of the second element during their passage from their close position to their spaced apart position. The mounting of such a deformable system in a gear change transmission device is similar to that shown in particular in EP-A-0 758 970.
Les masselottes, quelles que soient leurs posi- tions, définissent un contour interne circulaire sensiblement continu. Ainsi, il est possible d'implanter le système déformable dans une transmission différentielle (ou à train épicycloïdal) dans laquelle les cliquets seraient solidaires d'un support rotatif mobile par rapport à la platine.The weights, whatever their positions, define a substantially continuous circular internal contour. Thus, it is possible to implement the deformable system in a differential transmission (or planetary gear) in which the pawls would be secured to a rotating support movable relative to the plate.
Un tel dispositif de transmission de type différentiel est représenté sur la figure 6. Ce dispositif comporte trois rapports, mais seul le passage entre les deux premiers rapports (nommés première et deuxième) sera détaillé ici afin d'en simplifier la description. Il va de soi que ce dispositif peut avoir plus de rapports et comporter un ou plusieurs systèmes déformables.Such a differential type transmission device is shown in FIG. has three reports, but only the passage between the first two reports (named first and second) will be detailed here to simplify the description. It goes without saying that this device can have more reports and include one or more deformable systems.
Ce dispositif est logé dans le moyeu 50 d'une roue de bicyclette monté, de façon connue en soi, pour pivoter sur un axe 51 fixe. L'axe fixe 51 est pourvu extérieurement de dents 52 sur lesquelles engrènent des sa- tellites 53 montés pour pivoter sur un porte-satellitesThis device is housed in the hub 50 of a bicycle wheel mounted, in known manner, for pivoting on a fixed axis 51. The fixed axis 51 is externally provided with teeth 52 on which meshes 53 are fitted to rotate on a planet carrier
54 reçu à pivotement dans le moyeu 50 et sur l'arbre 51.54 pivotally received in the hub 50 and the shaft 51.
Un planétaire 55, de forme tubulaire, est monté pour pivoter sur le porte-satellites 54 et comporte une denture interne engrenant avec les satellites 53. Un noyau d'entraînement 56 est monté pour pivoter dans le moyeu 50 et sur une extrémité du porte-satellites 54. Le noyau d'entraînement 56 est solidaire d'un pignon 57 engrenant sur la chaîne de transmission de la bicyclette. Un système déformable 1 est monté fixe dans le moyeu 50 en regard de cliquets 58, dits cliquets de deuxième, montés sur le noyau d'entraînement 56 pour être mobiles entre une position débrayée (représentée sur la figure 6) et une position embrayée dans laquelle ils coo- pèrent avec des dents de loup 59 pourvues extérieurement sur ladite extrémité du porte-satellites 54.A planetary gear 55, of tubular form, is mounted to pivot on the planet carrier 54 and has an internal toothing meshing with the satellites 53. A drive core 56 is mounted to pivot in the hub 50 and at one end of the carrier. 54. The drive core 56 is integral with a pinion 57 meshing on the transmission chain of the bicycle. A deformable system 1 is fixedly mounted in the hub 50 opposite pawls 58, said second pawls, mounted on the drive core 56 to be movable between a disengaged position (shown in Figure 6) and an engaged position in which they co-operate with wolf teeth 59 provided externally on said end of the planet carrier 54.
Des cliquets 60, dits cliquets de première, sont montés entre le noyau d'entraînement 56 et le planétairePawls 60, said ratchets first, are mounted between the drive core 56 and the sun gear.
55 pour lier ceux-ci en rotation tant que le noyau d'en- traînement 56 a une vitesse de rotation supérieure à celle du planétaire 55. Les cliquets 60 sont des cliquets formant roue libre.The pawls 60 are freewheeling pawls 55 to rotate them as long as the drive core 56 has a higher rotational speed than the sun gear 55. The pawls 60 are free wheel pawls.
En première, la rotation du noyau d'entraînementIn first, the rotation of the training core
56 est transmise au moyeu 50 par les cliquets 60, le pla- nétaire 55, les satellites 53, le porte-satellites 54 lié en rotation au moyeu 50 par des cliquets 61 formant roue libre. Lorsque la vitesse du moyeu 50 atteint une vitesse engendrant une force centrifuge suffisante, les masselottes 6.1, 6.2 quittent leur position rapprochée pour aller dans leur position écartée libérant les cli- quets 58 qui, sous l'action de ressorts non représentés, vont engrener avec les dents de loup 59. La rotation du noyau d'entraînement 56 est alors transmise au moyeu 50 par les cliquets 58, le porte-satellites 54 et les cliquets 61. Le planétaire 55 n'est alors plus menant mais mené et le dispositif est alors en deuxième.56 is transmitted to the hub 50 by the pawls 60, the planet 55, the satellites 53, the planet carrier 54 rotatably connected to the hub 50 by pawls 61 forming a freewheel. When the speed of the hub 50 reaches a speed generating a sufficient centrifugal force, the weights 6.1, 6.2 leave their close position to go to their spaced apart position releasing the keys 58 which, under the action of not shown springs, will mesh with the wolf teeth 59. The rotation of the drive core 56 is then transmitted to the hub 50 by the pawls 58, the planet carrier 54 and the pawls 61. The sun gear 55 is then no longer driven but driven and the device is then second.
Le passage de la deuxième à la première est obtenu de manière inverse .The transition from the second to the first is obtained in the opposite way.
On notera que, compte tenu des rapports de denture du train épicycloïdal formé par le planétaire 55, les satellites 53, la denture 52, le système déformable 1 ne tourne pas à la même vitesse que le noyau d'entraînement 56. Le contour interne circulaire sensiblement continu des masselottes 6.1, 6.2 permet d'avoir toujours une masselotte en regard d'un cliquet 58. Bien entendu, l'invention n'est pas limitée au mode de réalisation décrit et on peut y apporter des variantes de réalisation sans sortir du cadre de l'invention tel que défini par les revendications.Note that, given the gear ratios of the planetary gear train formed by the sun gear 55, the satellites 53, the toothing 52, the deformable system 1 does not turn at the same speed as the drive core 56. The circular internal contour substantially continuous weights 6.1, 6.2 allows to always have a weight against a pawl 58. Of course, the invention is not limited to the embodiment described and can be made to implement variants without departing the the scope of the invention as defined by the claims.
En particulier, le système peut comprendre des masselottes, non superposées et disposées de part et d'autre de l'axe sensible, ayant des extrémités articulées à la platine pour pivoter en sens inverses et des extrémités opposées reliées l'une à l'autre par une genouillère formant la partie de liaison. Les reliefs réci- proques de guidage mutuel peuvent également comprendre une nervure en saillie des masselottes.In particular, the system may comprise weights, not superimposed and disposed on either side of the sensitive axis, having ends articulated to the plate for pivoting in opposite directions and opposite ends connected to each other by a knee joint forming the connecting part. The reciprocal mutual guide reliefs may also include a rib projecting from the flyweights.
Les masselottes peuvent être montées libres en rotation sur des axes reliant les couronnes 3.1, 3.2 ou serrées sur des axes ayant des extrémités reliées libres en rotation aux couronnes 3.1, 3.2.The flyweights can be rotatably mounted on axles connecting the rings 3.1, 3.2 or clamped on axles having rotatably connected ends to the rings 3.1, 3.2.
Les masselottes peuvent avoir une forme différente de celle décrite. L'utilisation de six masselottes est avantageuse car elle permet une meilleure répartition des masses et améliore la compensation des efforts parasites. Il est néanmoins possible de modifier le nombre de masselottes. On peut de la sorte réaliser un système dé- formable à quatre masselottes.The weights may have a shape different from that described. The use of six weights is advantageous because it allows a better distribution of the masses and improves the compensation of parasitic forces. It is nevertheless possible to modify the number of weights. In this way, it is possible to produce a deformable system with four weights.
L ' organe de rappel peut être un ressort interposé entre une masselotte et la platine. Différents types d'organes de rappel sont utilisables dont les ressorts de traction ou de compression. La structure du dispositif de transmission peut être différente de celle décrite. The return member may be a spring interposed between a flyweight and the plate. Different types of return members are usable including the tension springs or compression. The structure of the transmission device may be different from that described.

Claims

REVENDICATIONS
1. Système déformable par une force centrifuge, comprenant une platine (2) rotative autour d'un axe sen- sible (5) et des masselottes (6) reliées à la platine par une articulation d'axe parallèle à l'axe sensible pour pivoter entre une position rapprochée dans laquelle les masselottes sont rappelées par un organe élastique (15) et une position écartée lorsque la platine a une vitesse telle que la force centrifuge a sur les masselottes une action surpassant une action de l'organe élastique, chaque masselotte comportant une partie massive (8) et au moins une partie de liaison (11, 12, 13, 14) à une masse- lotte adjacente, caractérisé en ce que la partie massive et chaque partie de liaison se trouvent d'un même côté d'un rayon de la platine passant par l'axe sensible et 1 ' articulation .1. System deformable by a centrifugal force, comprising a plate (2) rotatable about a sensitive axis (5) and weights (6) connected to the plate by a hinge axis parallel to the sensitive axis for pivoting between a close position in which the weights are biased by an elastic member (15) and a position spaced apart when the plate has a speed such that the centrifugal force has on the weights an action surpassing an action of the elastic member, each weight having a solid portion (8) and at least one connecting portion (11, 12, 13, 14) to an adjacent ground weight, characterized in that the solid portion and each connecting portion are on the same side a radius of the plate passing through the sensitive axis and the articulation.
2. Système déformable selon la revendication 1, caractérisé en ce que l'organe de rappel comprend un res- sort (15) reliant les masselottes (6) deux à deux.2. deformable system according to claim 1, characterized in that the return member comprises a spring (15) connecting the weights (6) two by two.
3. Système déformable selon la revendication 1, dans lequel chaque masselotte (6) a une forme de secteur annulaire .3. deformable system according to claim 1, wherein each weight (6) has an annular sector shape.
4. Système déformable selon la revendication 2, dans lequel les masselottes (6) forment sensiblement un anneau .4. deformable system according to claim 2, wherein the weights (6) substantially form a ring.
5. Système déformable selon la revendication 3 ou la revendication 4, comprenant une première et une deuxième séries d'au moins deux masselottes (6.1, 6.2), la première série étant superposée à la deuxième série et les masselottes de la première série étant montées sur la platine pour pivoter dans un sens opposé au sens de pivotement des masselottes de la deuxième série, chaque masselotte de la première série ayant des parties de liaison en regard des parties de liaison de deux masselottes ad- jacentes de la deuxième série, les parties de liaison des masselottes de la première série et les parties de liaison des masselottes de la deuxième série comportant des reliefs réciproques de guidage mutuel (11, 12, 13, 14) . 5. deformable system according to claim 3 or claim 4, comprising a first and a second series of at least two weights (6.1, 6.2), the first series being superimposed on the second series and the weights of the first series being mounted on the plate for pivoting in a direction opposite to the direction of pivoting of the weights of the second series, each weight of the first series having connecting portions facing the connecting portions of two flyweights ad- of the second series, the connecting portions of the weights of the first series and the connecting portions of the weights of the second series comprising reciprocal mutual guide reliefs (11, 12, 13, 14).
6. Système déformable selon la revendication 5, dans lequel les reliefs réciproques de guidage mutuel comportent au moins un flanc de guidage (11, 12) solidaire de l'une des masselottes (6.1) et un ergot (13, 14) en saillie latérale d'une masselotte (6.1) correspondante pour coulisser le long du flanc de guidage.6. deformable system according to claim 5, wherein the reciprocal mutual guide reliefs comprise at least one guide flank (11, 12) integral with one of the weights (6.1) and a lug (13, 14) in lateral projection. a counterweight (6.1) corresponding to slide along the guide flank.
7. Système déformable selon la revendication 6, dans lequel le flanc de guidage délimite latéralement une rainure (11, 12) ménagée dans la masselotte (6.2) .7. deformable system according to claim 6, wherein the guide flank delimits laterally a groove (11, 12) formed in the weight (6.2).
8. Système déformable selon la revendication 5, dans lequel chaque série de masselottes (6.1, 6.2) comprend six masselottes .8. deformable system according to claim 5, wherein each series of weights (6.1, 6.2) comprises six weights.
9. Système déformable selon la revendication 5, dans lequel l'organe élastique est un ressort (15) qui est disposé entre deux masselottes (6.1, 6.2) en regard et qui possède des extrémités reliées chacune à une de ces masselottes.9. deformable system according to claim 5, wherein the elastic member is a spring (15) which is disposed between two weights (6.1, 6.2) opposite and which has ends each connected to one of these weights.
10. Dispositif de transmission comprenant un élément menant (56) relié à un élément mené (50) par un train épicycloïdal comportant un porte-satellites (54) et un planétaire (55) coaxiaux, le porte-satellites étant équipé de satellites (53) engrenant sur un axe central fixe (51) et sur le planétaire (55) , des cliquets de roue libre (60) étant montés entre l'élément menant et le planétaire et des cliquets commandés (58) étant montés sur l'élément menant pour être mobiles entre une position embrayée avec le porte-satellites et une position débrayée, un système déformable conforme à l'une quelconque des revendications précédentes étant monté fixe dans l'élément mené en regard des cliquets commandés, de telle manière que les masselottes (6.1, 6.2) soient au contact des cli- quets commandés et permettent le passage de ceux-ci de leur position débrayée à leur position embrayée lorsqu'elles sont déplacées de leur position rapprochée à leur position écartée. Transmission device comprising a driving element (56) connected to a driven element (50) by an epicyclic gear train having a coaxial planet carrier (54) and sun gear (55), the planet carrier being equipped with satellites (53). ) meshing on a fixed central axis (51) and on the sun gear (55), freewheel pawls (60) being mounted between the driving element and the sun gear and controlled pawls (58) being mounted on the driving element to be movable between a position engaged with the planet carrier and a disengaged position, a deformable system according to any preceding claim being fixedly mounted in the driven element opposite the pawls controlled, so that the flyweights ( 6.1, 6.2) are in contact with the quets ordered and allow the passage of these from their disengaged position to their engaged position when they are moved from their close position to their spaced position.
PCT/FR2007/000802 2006-05-16 2007-05-11 System deformable by centrifugal force WO2007132087A1 (en)

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FR0604355A FR2901235B1 (en) 2006-05-16 2006-05-16 CENTRIFUGAL FORCE DEFORMABLE SYSTEM
FR0604355 2006-05-16

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GB1220359A (en) * 1967-08-11 1971-01-27 Shimano Industrial Co A bicycle hub having a three ratio gear mechanism
US3557922A (en) * 1968-07-04 1971-01-26 Fichtel & Sachs Ag Centrifugal governor for a multiple-speed hub
US3608398A (en) * 1968-09-24 1971-09-28 Shimano Industrial Co Bicycle hub having a built-in three-stage speed change mechanism
GB1284229A (en) * 1968-11-15 1972-08-02 Fichtel & Sachs Ag Centrifugally actuated clutch
US3661034A (en) * 1969-01-16 1972-05-09 Fichtel & Sachs Ag Multiple-speed hub
US3659688A (en) * 1969-09-11 1972-05-02 Fichtel & Sachs Ag Centrifugally operated clutch in a two-speed bicycle hub
US3701292A (en) * 1969-12-24 1972-10-31 Eichtel & Sachs Ag Multiple speed hub with automatic gear change and manual override
US4098147A (en) * 1976-11-01 1978-07-04 Avco Corporation Waddington drive having a cam actuated by an integral flyweight
FR2711351A1 (en) * 1993-10-20 1995-04-28 Lenoble Jean Paul Manual or automatic differential gear shift for pedal vehicle.
EP0758970B1 (en) * 1994-09-13 2002-11-20 Jean-Paul Lenoble Differential selection automatic gear change for pedal vehicles
EP0895928A2 (en) * 1997-08-08 1999-02-10 Shimano Inc. Hub transmission for a bicycle

Also Published As

Publication number Publication date
FR2901235B1 (en) 2008-08-01
EP2018315A1 (en) 2009-01-28
FR2901235A1 (en) 2007-11-23

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