EP1957352A1 - Bicycle crankset - Google Patents

Bicycle crankset

Info

Publication number
EP1957352A1
EP1957352A1 EP06831094A EP06831094A EP1957352A1 EP 1957352 A1 EP1957352 A1 EP 1957352A1 EP 06831094 A EP06831094 A EP 06831094A EP 06831094 A EP06831094 A EP 06831094A EP 1957352 A1 EP1957352 A1 EP 1957352A1
Authority
EP
European Patent Office
Prior art keywords
cranks
pedal
crankset
frame
cycle
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Withdrawn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
EP06831094A
Other languages
German (de)
French (fr)
Inventor
Michel Garnier
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 EP1957352A1 publication Critical patent/EP1957352A1/en
Withdrawn legal-status Critical Current

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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
    • B62M3/00—Construction of cranks operated by hand or foot
    • B62M3/003—Combination of crank axles and bearings housed in the bottom bracket

Definitions

  • the present invention relates to a cycle pedal such as a racing bike, a mountain bike, or motorized assistance cycles requiring the use of a pedal to start the engine. It will particularly find its application among manufacturers and cycle traders.
  • the cranks are generally rotatably mounted on the frame of the cycle and are subjected to a rotational movement generated by the pedaling exerted by a cyclist, the rotational movement of the crankset driving through a chain or a transmission belt one of the wheels of the cycle, usually the rear wheel.
  • the crankset consists in part of two cranks and at least one plate secured to said cranks, the two cranks being secured to one another at their axial end by means of a connecting shaft, more commonly called the axis of the pedal, said shaft being housed in a cage on the frame of the cycle; the cranks are arranged at one hundred and eighty degrees relative to each other and each have at their radial end a pedal, the pedaling of the cyclist exerting a force on the pedals resulting in a radial force and a tangential force on the cranks, said tangential force generating rotation of the plate.
  • crank assembly on a cycle frame US 5,493,937; US 4,545,691; AT 389,499; US 4,651,590; FR 2,465,630; DE 93.15.940.
  • assembly of the crankset on the frame of the cycle is achieved by assembling the connecting shaft, or the axial ends of the cranks, in pivot connection, for example by means of bearings mounted inside the cage of the frame of the cycle. According to this type of assembly, the forces exerted on the cranks during the pedaling are thus reported on the connecting shaft directly or indirectly through the axial ends of the cranks.
  • the tree of The connection is therefore subjected to torsional stresses resulting from the tangential forces exerted on the cranks and the resistance exerted by the chain or the transmission belt which meshes with the plate.
  • This shaft is also subjected to bending stresses resulting from radial forces exerted on the cranks and which refer directly to the ends of the connecting shaft integral with said cranks.
  • the connecting shaft is therefore permanently subjected to torsion and bending forces during pedaling; the intensity of the efforts varying according to the conditions of use of the cyclist; the linkage shaft current cranks is usually designed steel, which gives it in particular good mechanical resistance to bending stresses, possibly avoiding the risk of rupture of the shaft in extreme use.
  • the use of steel has the disadvantage of increasing the mass of the pedal and therefore that of the cycle; which goes against the reduction of the mass of the cycles which represents one of the essential objectives of all the manufacturers, and more particularly the manufacturers of competition bicycles.
  • the cranks are generally mounted on the axial ends of the connecting shaft.
  • This connecting shaft therefore has a length at least equal to the width of the cage of the frame of the cycle increased by the width of the two axial ends of the cranks.
  • the pedals must be spaced a suitable distance to provide ease to the cyclist and optimize the pedaling effort; this distance is nevertheless close to the length of the connecting shaft, so that cyclists often rub their ankles on the cranks during pedaling, resulting in injury or bleeding.
  • US Patent 5,493,937 provides for mounting the extension of the axial ends of the cranks inside the cage of the bicycle frame.
  • US Patent 4,545,691 provides patches allowing assembly of the extension of the axial ends of the cranks inside the frame of the bicycle frame.
  • this type of assembly also requires a distance or spacing between the axial ends of the cranks greater than the width of the cage of the bicycle frame, this spacing or spacing corresponding to the space required between the pedals to provide ease of pedaling cyclist and to optimize the pedaling effort.
  • the present invention aims to overcome such drawbacks by providing a pedal cycle to reduce the mass of the cycle and avoid injuries of the cyclist.
  • the invention relates to a cycle pedal such as a bicycle, rotatably mounted on the frame of said cycle along an axis of rotation perpendicular to the plane of the frame, said pedal consisting of two cranks arranged on both sides. other of the plane of the frame, at least one drive plate adjacent to one of the cranks and secured thereto, said cranks being secured by their axial end to a connecting shaft whose axis corresponds to the axis of rotation of the crankset, said linkage shaft reporting on the plate the tangential forces exerted on the cranks during pedaling causing the rotation of said plate;
  • the invention is remarkable in that the mounting of the crankset on the cycle is constituted by connecting means in pivot connection between the axial ends of the cranks and the frame of the cycle, said connecting means in pivot connection being constituted by two mounting rings fixed on the frame, two bearings, the axial ends of the two cranks, and translation stop means of the two cranks, said bearings having their inner cage mounted on the rings, and their outer cage mounted on the axial
  • the invention advantageously makes it possible to use a softer material for the design of the connecting shaft because of the removal of bending stresses which are no longer exerted on said shaft but on the frame of the cycle; the shaft can be designed in a lighter material and resistant to torsional stress, thus contributing to the reduction of the mass of the cycle.
  • the design of the crankset according to the invention also has the advantage of directly mounting the axial end of the cranks on the cage of the frame, or on a piece attached to the cage of the frame, reducing the spacing between the two cranks, this which helps to reduce the dimensions of the tree and has the advantage of improving the ergonomics of the cycle and to free up the space occupied by the rider's ankles during a pedaling cycle, thus reducing the risk of injury.
  • FIG. 1 represents in axial section a crankset according to the invention assembled on a cycle frame
  • FIG. 2 represents an exploded view of the crankset alone, as represented in FIG. 1,
  • FIG. 3 shows a partial section of a mounting mode of a pedal on a crank of the pedal according to the present invention.
  • the bicycle pedal 1 object of the present invention is particularly intended for cycles like race bike, mountain bike, especially those used to perform competition or intensive use.
  • the pedal 1, shown in Figure 1 is mounted on the frame 3 of the cycle and is rotated relative thereto along an axis of rotation 5 perpendicular to the longitudinal plane "P" of the frame 3 of the cycle, said plane “P" being, under normal conditions of use, with the sagittal plane of the cyclist when seated on the cycle.
  • the crankset 1 consists of two cranks 7, 9 consist of a body 11, 13 acting as a lever arm when the cyclist pedal, an axial end 15, 17 disposed in the axis 5 of the pedal 1, and a radial end 19, 21 on which is fixed a pedal 23 such as that shown in Figure 3.
  • the pedals used are those described in the patent in France FR 2846724.
  • the cranks 7, 9 are arranged on either side of the plane "P" at an equal distance, and offset by one hundred and eighty degrees (180 °) with respect to each other along the axis rotation 5; the two cranks 7, 9 are therefore antisymmetric in the reference defined by the plane "P" and the axis of rotation 5.
  • the crankset 1 also comprises at least one drive plate 25 of axis of rotation the axis 5 of the crankset; it comprises, for example, at least one toothed wheel 27, 29 on which meshes a chain or a transmission belt which drives in rotation at least one of the wheels of the cycle, preferably the rear wheel, during the rotation of the plate generated by the cyclist's pedaling.
  • the plate 25 is disposed in a plane parallel to the plane "P" and is adjacent to one of the cranks 7, 9, preferably the right hand crank 9. In a preferred and nonlimiting mode, the plate used is the one that made the subject of the patent application in France FR 05.00505.
  • cranks 7, 9 are secured and fixed to each other by a connecting shaft 31, shown in Figure 1, whose axis coincides with the axis of rotation 5 of the crankset 1; the attachment shaft is fixed at the axial ends 15, 17 of the cranks.
  • the plate 25 is integral with the cranks 7, 9 and the connecting shaft 31, the fixing of the plate being carried out, in a preferred and nonlimiting mode, on one of the cranks.
  • the assembly cranks 7, 9, connecting shaft 31 and plate 25 is integral and rotates at the same speed of rotation.
  • the pedal 1 is remarkable in that it comprises means of assembly in pivot connection between the axial ends 15, 17 of the cranks 7, 9 and the frame 3. These assembly means are arranged so that the axial ends 15, 17 of the cranks 7, 9 receive the ends of the cage of the frame 3, said ends of the frame 3 being inserted into the axial ends 15, 17 of the cranks 7, 9, which allows on the one hand, the frame 3 to directly support the forces exerted on the cranks 7, 9, and on the other hand, to move the position of the axial ends 15, 17 and the bodies 11 of the cranks 7, 9, these being placed and integrated in the width of the cage of the frame 3.
  • This design of the pedal has the function of transferring to the frame 3 the radial forces which are subjected to the radial ends 19, 21 of the cranks during pedaling.
  • Such a design is remarkable in that it mechanically relieves the connecting shaft 31 by limiting the forces exerted on it during pedaling; indeed, the connecting shaft is freely mounted in the cage 33 of the frame 3 of the cycle and is subjected only to torsional stresses corresponding to the transfer of the tangential forces of at least one of the cranks on the
  • the reduction of the stresses on the connecting shaft 31 of the crankset 1 to torsional stresses alone has the advantage of manufacturing said shaft 31 in a material lighter than steel, and it will be used in a preferential and nonlimiting mode an aluminum alloy which is suitably resistant to torsional stresses.
  • cranks 7, 9 are assembled directly on the lateral ends 35, 37 of the frame 3, which makes it possible to reduce the length of the connecting shaft 31 which no longer has to support the cranks, these being supported by the frame 3, its only functions being to transmit the rotational movement on the plate 25 and to maintain fixed the cranks 7, 9 respecting a wedging angle between them.
  • the connecting means in pivot connection of the cranks 7, 9 on the frame 3 are in a preferred and nonlimiting mode constituted by two rings 39, 41 for mounting on the frame 3, by bearings 43, 45, by the axial ends 15, 17, and by translation stop means cranks.
  • the mounting rings 39, 41 are screwed onto the lateral ends 35, 37 of the frame 3.
  • the lateral ends 35, 37 are threaded and the rings 39, 41 have a threaded first end 47, 49 which ends with a shoulder 51, 53.servant stopping on the frame 3, the second ends 55, 57 of the rings 39, 41 receive the internal stands 59, 61 of the bearings 43, 45 and therefore have a corresponding diameter, the cages 63, 65 of the bearings 43, 45 are in turn mounted in the axial ends 15, 17 of the cranks 7, 9, which have a bored form 67, 69 of diameter corresponding to that of the outer cage 63, 65 bearings for receiving said outer cage.
  • the mounting conditions of the bearings 43, 45 in the bores 67, 69 and on the rings 39, 41 will preferably comply with the rules for fitting the bearings known to those skilled in the art.
  • the connecting shaft 31 is constituted by the axial ends 15, 17 of the two cranks 7, 9 which extend towards the inside of the cage 33 of the frame 3 along the axis of rotation 5, the two extensions 71, 73 having coupling means 75, 77 for transferring the torsional force on the plate causing its rotation.
  • These coupling means 75, 77 are preferably implemented by splines, one of the extensions 71 ending in the form of splined conical shaft 75 constituting the male part which cooperates with the female part constituted by the second extension 73 which terminates in the form of fluted conical hub 77.
  • the translation stopping means of the cranks 7, 9 allow to maintain them assembled and coupled, ensuring proper fitting of the crankset 1 on the frame 3 of the cycle.
  • These means are obtained by the extension 71 male of the axial end 15 of the crank 7, that is to say the shaft 75, said extension 71 being hollow and threaded on its inner portion 79 which receives a screw of stop 81 penetrating inside 83 of the female extension 73 of the axial end 17 of the second crank 9, that is to say the hub 77, the head 85 of the screw 81 bearing on a shoulder 87 made inside 83 of said extension 73, making it possible to keep the two axial ends 15, 17 clamped together when the screw 81 is assembled on the inner part 79.
  • the pedal assembly comprises a preformed washer 86 shown in Figures 1 and 2 which makes it possible to constrain the bearings 43 and 45 and to absorb the different manufacturing tolerances of the frame 3 and the cranks 7 and 9.
  • connection shaft 31 formed directly by the axial ends 15, 17 of the cranks 7, 9 contributes to reducing the amount of material used to design the pedal 1 object of the invention, and therefore tends to reduce its mass.
  • connection shaft which fits completely inside the axial ends 15, 17 of the cranks 7, 9 and cooperates, in this case, with adapted and machined shapes thereon, performing the same functions as those described above.
  • the axial ends 15, 17 comprise indexing means, not shown in the figures, which make it possible to angularly wedge the bodies 11, 13 of the cranks 7, 9 at one hundred and eighty degrees relative to one another.
  • indexing means are, in a preferred and nonlimiting manner, constituted by the splines on the shaft 75 and on the hub 77, the splines on the shaft 75 having for example at least one tooth of different width from the other teeth and the grooves on the hub 77 having a hollow width corresponding to that of said tooth, this design requiring the said tooth to face said hollow to be able to mesh the grooves of the shaft 75 in those of the hub 77.
  • the extension 71 on the axial end 15 of the crank 7 has an external diameter "Dl” which, in a preferred and non-limiting design, is equal to the external diameter "D2" of the extension 73 on the axial end 17 of the crank 9. These diameters "D1, D2" are smaller than the internal diameter "D3" on the rings 39, 41 to allow the frictionless insertion of the extensions 71, 73 inside said rings 39, 41.
  • the plate 25 is mounted on the axial end 15, 17 of one of the cranks 1, 9 which comprises an outer diameter 88 with teeth 89 intended to receive the toothing 91 made inside the plate 25, said plate being stopped in translation by means of a clamping nut 93 which is screwed on the thread 95 also made on the outer diameter 88.
  • This method of assembly is remarkable in that it leaves the possibility of adjusting the plate 25 angularly relative to the cranks 7 and 9.
  • the toothing 91 of the plate 25 has the same pitch as the toothing 89 on one of the cranks 7, 9, these teeth 91, 89 having no polarizer to allow the modification of the setting of the plateau 25 relative to the cranks 7, 9 when said plate 25 is of non-circular shape in order to better adapt the setting of the pedal according to the morphology of the cyclist and its positioning on the cycle.
  • This type of plate is, for example, described in the patent application FR 05.00505.
  • the pedal 23 of the cycle are mounted in pivot connection 97, and by direct assembly on the radial ends 19, 21 of the cranks 7, 9; the pivot connection 97 being constituted by at least one bearing 99 which is mounted directly between the pedal 23 and the crank 7, 9.
  • the end of the pedal ends with a hollow axis 101, the outer diameter 103 of the axis 101 receiving the inner race 105 of the bearing 99, the outer race 107 of said bearing being inserted into the bore 109 formed on the radial end 19, 21 of the crank 7, 9.
  • the inner diameter 111 of the hollow shaft 101 of the pedal 23 is threaded and receives by screwing a stop screw 113 in translation of the pedal 23 on the bearing 99, the shoulder 115 on the axis 101 and the head 117 of the stop screw 111 being supported on the Lateral ends of the bearing 99 during the tightening of said screw 111.
  • This design is remarkable in that it eliminates any additional assembly part, which therefore contributes to lighten the pedal 1 of the present invention.
  • crankset within the reach of those skilled in the art may be envisaged without departing from the scope of the present invention.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Motorcycle And Bicycle Frame (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Gears, Cams (AREA)
  • Transmission Devices (AREA)

Abstract

The present invention relates to a bicycle crankset (1) mounted on the frame (3) of said bicycle, said crankset (1) consisting of two cranks (7, 9) and at least one chainring (25), said cranks being connected at their axial end (15, 17) by a connecting spindle (31). It is noteworthy in that the connection of the crankset to the frame is provided by means of assembling the axial ends to the frame, thus mechanically relieving the connecting spindle and reducing the dimensions of the connecting spindle and the distance “e” between the axial ends. The crankset is also noteworthy in that each crank takes a pedal which is fitted directly to the crank. This helps to reduce the weight of said crankset.

Description

PEDALIER DE CYCLE CYCLE PEDAL
La présente invention est relative à un pédalier de cycle tel qu'un vélo de course, un vélo tout terrain, ou encore les cycles à assistance motorisée nécessitant l'utilisation d'un pédalier pour lancer le moteur. Elle trouvera tout particulièrement son application chez les constructeurs et chez les commerçants de cycle.The present invention relates to a cycle pedal such as a racing bike, a mountain bike, or motorized assistance cycles requiring the use of a pedal to start the engine. It will particularly find its application among manufacturers and cycle traders.
Les pédaliers sont généralement montés en rotation sur le cadre du cycle et sont soumis à un mouvement de rotation généré par le pédalage exercé par un cycliste, le mouvement de rotation du pédalier entraînant par le biais d'une chaîne ou d'une courroie de transmission l'une des roues du cycle, généralement la roue arrière.The cranks are generally rotatably mounted on the frame of the cycle and are subjected to a rotational movement generated by the pedaling exerted by a cyclist, the rotational movement of the crankset driving through a chain or a transmission belt one of the wheels of the cycle, usually the rear wheel.
Le pédalier se compose en partie de deux manivelles et d'au moins un plateau solidaire desdites manivelles, les deux manivelles étant solidarisées l'une à l'autre au niveau de leur extrémité axiale au moyen d' un arbre de liaison, plus couramment appelé l'axe du pédalier, ledit arbre étant logé dans une cage sur le cadre du cycle ; les manivelles sont disposées à cent quatre vingt degrés l'une par rapport à l'autre et disposent chacune à leur extrémité radiale d'une pédale, le pédalage du cycliste exerçant un effort sur les pédales se traduisant par un effort radial et un effort tangentiel sur les manivelles, ledit effort tangentiel générant la rotation du plateau.The crankset consists in part of two cranks and at least one plate secured to said cranks, the two cranks being secured to one another at their axial end by means of a connecting shaft, more commonly called the axis of the pedal, said shaft being housed in a cage on the frame of the cycle; the cranks are arranged at one hundred and eighty degrees relative to each other and each have at their radial end a pedal, the pedaling of the cyclist exerting a force on the pedals resulting in a radial force and a tangential force on the cranks, said tangential force generating rotation of the plate.
On connaît les documents suivants qui divulguent un assemblage de pédalier sur un cadre de cycle : US 5.493.937 ; US 4.545.691 ; AT 389.499 ; US 4.651.590 ; FR 2.465.630 ; DE 93.15.940. Dans ces documents, le montage du pédalier sur le cadre du cycle est réalisé en assemblant l'arbre de liaison, ou les extrémités axiales des manivelles, en liaison pivot, par exemple au moyen de roulements montés à l'intérieur de la cage du cadre du cycle. Selon ce type de montage, les efforts exercés sur les manivelles durant le pédalage sont donc reportés sur l'arbre de liaison directement ou indirectement par le biais des extrémités axiales des manivelles. L'arbre de liaison est par conséquent soumis à des contraintes de torsion résultant des efforts tangentiels exercés sur les manivelles et de la résistance exercée par la chaîne ou la courroie de transmission qui engrène avec le plateau. Cet arbre est également soumis à des contraintes de flexion provenant des efforts radiaux exercés sur les manivelles et qui se reportent directement sur les extrémités de l'arbre de liaison solidaires desdites manivelles.The following documents are known which disclose a crank assembly on a cycle frame: US 5,493,937; US 4,545,691; AT 389,499; US 4,651,590; FR 2,465,630; DE 93.15.940. In these documents, the assembly of the crankset on the frame of the cycle is achieved by assembling the connecting shaft, or the axial ends of the cranks, in pivot connection, for example by means of bearings mounted inside the cage of the frame of the cycle. According to this type of assembly, the forces exerted on the cranks during the pedaling are thus reported on the connecting shaft directly or indirectly through the axial ends of the cranks. The tree of The connection is therefore subjected to torsional stresses resulting from the tangential forces exerted on the cranks and the resistance exerted by the chain or the transmission belt which meshes with the plate. This shaft is also subjected to bending stresses resulting from radial forces exerted on the cranks and which refer directly to the ends of the connecting shaft integral with said cranks.
L'arbre de liaison est donc soumis en permanence à des efforts de torsion et de flexion au cours du pédalage ; l'intensité des efforts variant en fonction des conditions d'utilisation du cycliste ; l'arbre de liaison des pédaliers actuels est donc conçu généralement en acier, ce qui lui procure en particulier une bonne résistance mécanique aux contraintes de flexion, évitant éventuellement les risques de rupture de l'arbre en condition extrême d'utilisation. L'utilisation de l'acier présente cependant l'inconvénient d'augmenter la masse du pédalier et donc celle du cycle ; ce qui va à l' encontre de la réduction de la masse des cycles qui représente l'un des objectifs essentiels de tous les constructeurs, et plus spécialement des fabricants de vélos de compétition.The connecting shaft is therefore permanently subjected to torsion and bending forces during pedaling; the intensity of the efforts varying according to the conditions of use of the cyclist; the linkage shaft current cranks is usually designed steel, which gives it in particular good mechanical resistance to bending stresses, possibly avoiding the risk of rupture of the shaft in extreme use. The use of steel, however, has the disadvantage of increasing the mass of the pedal and therefore that of the cycle; which goes against the reduction of the mass of the cycles which represents one of the essential objectives of all the manufacturers, and more particularly the manufacturers of competition bicycles.
Les manivelles sont généralement montées sur les extrémités axiales de l'arbre de liaison. Cet arbre de liaison présente donc une longueur au moins égale à la largeur de la cage du cadre du cycle augmentée de la largeur des deux extrémités axiales des manivelles. Pour des raisons d'ergonomie, les pédales doivent être espacées d'une distance convenable pour procurer une aisance au cycliste et optimiser l'effort de pédalage ; cette distance est néanmoins proche de la longueur de l'arbre de liaison, de sorte que les cyclistes frottent souvent leurs chevilles sur les manivelles au cours du pédalage, entraînant par conséquent des blessures, voire des saignements. Le brevet US 5.493.937 prévoit un montage du prolongement des extrémités axiales des manivelles à l'intérieur de la cage du cadre de vélo. De même, le brevet US 4.545.691 prévoit des pièces rapportées permettant l'assemblage du prolongement des extrémités axiales des manivelles à l'intérieur de la cage du cadre de vélo. Toutefois, ce type de montage nécessite également un entraxe ou un écartement entre les extrémités axiales des manivelles supérieur à la largeur de la cage du cadre de vélo, cet entraxe ou écartement correspondant à l'espace nécessaire entre les pédales pour offrir une aisance de pédalage au cycliste et pour optimiser l'effort de pédalage. La présente invention a pour but de remédier à de tels inconvénients en proposant un pédalier de cycle permettant de réduire la masse du cycle et d'éviter les blessures du cycliste.The cranks are generally mounted on the axial ends of the connecting shaft. This connecting shaft therefore has a length at least equal to the width of the cage of the frame of the cycle increased by the width of the two axial ends of the cranks. For ergonomic reasons, the pedals must be spaced a suitable distance to provide ease to the cyclist and optimize the pedaling effort; this distance is nevertheless close to the length of the connecting shaft, so that cyclists often rub their ankles on the cranks during pedaling, resulting in injury or bleeding. US Patent 5,493,937 provides for mounting the extension of the axial ends of the cranks inside the cage of the bicycle frame. Similarly, US Patent 4,545,691 provides patches allowing assembly of the extension of the axial ends of the cranks inside the frame of the bicycle frame. However, this type of assembly also requires a distance or spacing between the axial ends of the cranks greater than the width of the cage of the bicycle frame, this spacing or spacing corresponding to the space required between the pedals to provide ease of pedaling cyclist and to optimize the pedaling effort. The present invention aims to overcome such drawbacks by providing a pedal cycle to reduce the mass of the cycle and avoid injuries of the cyclist.
A cet effet, l'invention concerne un pédalier de cycle tel qu'un vélo, monté en rotation sur le cadre dudit cycle suivant un axe de rotation perpendiculaire au plan du cadre, ledit pédalier se composant de deux manivelles disposées de part et d'autre du plan du cadre, d'au moins un plateau d'entraînement adjacent à l'une des manivelles et solidaire de celle-ci, lesdites manivelles étant solidarisées par leur extrémité axiale à un arbre de liaison dont l'axe correspond à l'axe de rotation du pédalier, ledit arbre de liaison reportant sur le plateau les efforts tangentiels exercés sur les manivelles au cours du pédalage entraînant la rotation dudit plateau ; l'invention est remarquable en ce que le montage du pédalier sur le cycle est constitué par des moyens d'assemblage en liaison pivot entre les extrémités axiales des manivelles et le cadre du cycle, lesdits moyens d'assemblage en liaison pivot étant constitués par deux bagues de montage fixées sur le cadre, deux roulements, les extrémités axiales des deux manivelles, et des moyens d'arrêt en translation des deux manivelles, lesdits roulements ayant leur cage interne montée sur les bagues, et leur cage externe montée sur les extrémités axiales des manivelles, permettant d'une part de soulager mécaniquement l'arbre de liaison et d'en réduire les dimensions et d'autre part de réduire l'entraxe entre les extrémités axiales des manivelles.To this end, the invention relates to a cycle pedal such as a bicycle, rotatably mounted on the frame of said cycle along an axis of rotation perpendicular to the plane of the frame, said pedal consisting of two cranks arranged on both sides. other of the plane of the frame, at least one drive plate adjacent to one of the cranks and secured thereto, said cranks being secured by their axial end to a connecting shaft whose axis corresponds to the axis of rotation of the crankset, said linkage shaft reporting on the plate the tangential forces exerted on the cranks during pedaling causing the rotation of said plate; the invention is remarkable in that the mounting of the crankset on the cycle is constituted by connecting means in pivot connection between the axial ends of the cranks and the frame of the cycle, said connecting means in pivot connection being constituted by two mounting rings fixed on the frame, two bearings, the axial ends of the two cranks, and translation stop means of the two cranks, said bearings having their inner cage mounted on the rings, and their outer cage mounted on the axial ends cranks, on the one hand mechanically relieve the connecting shaft and reduce the size and on the other hand to reduce the distance between the ends axial cranks.
L'invention permet avantageusement d'utiliser un matériau plus tendre pour la conception de l'arbre de liaison du fait de la suppression des contraintes de flexion qui ne s'exercent plus sur ledit arbre mais sur le cadre du cycle ; l'arbre pourra ainsi être conçu dans un matériau plus léger et résistant aux contraintes de torsion, contribuant ainsi à la réduction de la masse du cycle. La conception du pédalier selon l'invention présente de plus pour avantage de monter directement l'extrémité axiale des manivelles sur la cage du cadre, ou sur une pièce rapportée sur la cage du cadre, en réduisant l'entraxe entre les deux manivelles, ce qui contribue à diminuer les dimensions de l'arbre et a pour avantage d'améliorer l'ergonomie du cycle et de dégager l'espace occupé par les chevilles du cycliste au cours d'un cycle de pédalage, réduisant ainsi les risques de blessures.The invention advantageously makes it possible to use a softer material for the design of the connecting shaft because of the removal of bending stresses which are no longer exerted on said shaft but on the frame of the cycle; the shaft can be designed in a lighter material and resistant to torsional stress, thus contributing to the reduction of the mass of the cycle. The design of the crankset according to the invention also has the advantage of directly mounting the axial end of the cranks on the cage of the frame, or on a piece attached to the cage of the frame, reducing the spacing between the two cranks, this which helps to reduce the dimensions of the tree and has the advantage of improving the ergonomics of the cycle and to free up the space occupied by the rider's ankles during a pedaling cycle, thus reducing the risk of injury.
D'autres avantages et caractéristiques de la présente invention ressortiront mieux de la description qui va être donnée et s'appuie d'un exemple non limitatif de l'invention en référence aux dessins annexés dans lesquels :Other advantages and features of the present invention will emerge more clearly from the description which will be given and is based on a nonlimiting example of the invention with reference to the appended drawings in which:
- la figure 1 représente en coupe verticale axiale un pédalier selon l'invention assemblé sur un cadre de cycle, - la figure 2 représente une vue éclatée du pédalier seul tel que représenté à la figure 1,FIG. 1 represents in axial section a crankset according to the invention assembled on a cycle frame, FIG. 2 represents an exploded view of the crankset alone, as represented in FIG. 1,
- la figure 3 représente en coupe partielle un mode de montage d'une pédale sur une manivelle du pédalier conforme à la présente invention. Le pédalier 1 de cycle objet de la présente invention est notamment destiné aux cycles du type vélo de course, vélo tout terrain, en particulier ceux utilisés pour effectuer de la compétition ou un usage intensif. Le pédalier 1, représenté sur la figure 1, est monté sur le cadre 3 du cycle et il est en rotation par rapport à celui- ci suivant un axe de rotation 5 perpendiculaire au plan longitudinal « P » du cadre 3 du cycle, ledit plan « P » étant, dans des conditions normales d'utilisation, confondu avec le plan sagittal du cycliste lorsqu'il est en position assise sur le cycle.- Figure 3 shows a partial section of a mounting mode of a pedal on a crank of the pedal according to the present invention. The bicycle pedal 1 object of the present invention is particularly intended for cycles like race bike, mountain bike, especially those used to perform competition or intensive use. The pedal 1, shown in Figure 1, is mounted on the frame 3 of the cycle and is rotated relative thereto along an axis of rotation 5 perpendicular to the longitudinal plane "P" of the frame 3 of the cycle, said plane "P" being, under normal conditions of use, with the sagittal plane of the cyclist when seated on the cycle.
En référence aux figures 1 et 2, le pédalier 1 se compose de deux manivelles 7, 9 constituées d'un corps 11, 13 servant de bras de levier lorsque le cycliste pédale, d'une extrémité axiale 15, 17 disposée dans l'axe de rotation 5 du pédalier 1, et d'une extrémité radiale 19, 21 sur laquelle est fixée une pédale 23 telle que celle représentée sur la figure 3. Dans un mode préférentiel et non limitatif, les pédales utilisées sont celles décrites dans le brevet en France FR 2846724. Les manivelles 7, 9 sont disposées de part et d'autre du plan « P » à égale distance, et décalées de cent quatre vingt degrés (180°) l'une par rapport à l'autre suivant l'axe de rotation 5 ; les deux manivelles 7, 9 sont donc antisymétriques dans le repère défini par le plan « P » et l'axe de rotation 5.Referring to Figures 1 and 2, the crankset 1 consists of two cranks 7, 9 consist of a body 11, 13 acting as a lever arm when the cyclist pedal, an axial end 15, 17 disposed in the axis 5 of the pedal 1, and a radial end 19, 21 on which is fixed a pedal 23 such as that shown in Figure 3. In a preferred and non-limiting mode, the pedals used are those described in the patent in France FR 2846724. The cranks 7, 9 are arranged on either side of the plane "P" at an equal distance, and offset by one hundred and eighty degrees (180 °) with respect to each other along the axis rotation 5; the two cranks 7, 9 are therefore antisymmetric in the reference defined by the plane "P" and the axis of rotation 5.
Le pédalier 1 comprend également au moins un plateau 25 d'entraînement d'axe de rotation l'axe 5 du pédalier ; il comprend, par exemple, au moins une roue dentée 27, 29 sur laquelle engrène une chaîne ou une courroie de transmission qui entraîne en rotation au moins l'une des roues du cycle, de préférence la roue arrière, lors de la rotation du plateau générée par le pédalage du cycliste. Le plateau 25 est disposé dans un plan parallèle au plan « P » et est adjacent à l'une des manivelles 7, 9, de préférence la manivelle de droite 9. Dans un mode préférentiel et non limitatif, le plateau utilisé est celui ayant fait l'objet de la demande de brevet en France FR 05.00505.The crankset 1 also comprises at least one drive plate 25 of axis of rotation the axis 5 of the crankset; it comprises, for example, at least one toothed wheel 27, 29 on which meshes a chain or a transmission belt which drives in rotation at least one of the wheels of the cycle, preferably the rear wheel, during the rotation of the plate generated by the cyclist's pedaling. The plate 25 is disposed in a plane parallel to the plane "P" and is adjacent to one of the cranks 7, 9, preferably the right hand crank 9. In a preferred and nonlimiting mode, the plate used is the one that made the subject of the patent application in France FR 05.00505.
Les manivelles 7, 9 sont solidarisées et fixées l'une à l'autre par un arbre de liaison 31, représenté sur la figure 1, dont l'axe est confondu avec l'axe de rotation 5 du pédalier 1 ; la fixation de l'arbre de liaison est réalisée au niveau des extrémités axiales 15, 17 des manivelles. Le plateau 25 est solidaire des manivelles 7, 9 et de l'arbre de liaison 31, la fixation du plateau étant réalisée, dans un mode préférentiel et non limitatif, sur l'une des manivelles. L'ensemble manivelles 7, 9, arbre de liaison 31 et plateau 25 est donc solidaire et tourne à une même vitesse de rotation.The cranks 7, 9 are secured and fixed to each other by a connecting shaft 31, shown in Figure 1, whose axis coincides with the axis of rotation 5 of the crankset 1; the attachment shaft is fixed at the axial ends 15, 17 of the cranks. The plate 25 is integral with the cranks 7, 9 and the connecting shaft 31, the fixing of the plate being carried out, in a preferred and nonlimiting mode, on one of the cranks. The assembly cranks 7, 9, connecting shaft 31 and plate 25 is integral and rotates at the same speed of rotation.
Au cours du pédalage du cycliste, les extrémités radiales 19, 21 des manivelles I1 9 sont soumises à des efforts radiaux et des efforts tangentiels ; les efforts tangentiels exercés sur les extrémités radiales 19, 21 sont transférés sur l'arbre de liaison 31 qui est soumis à des contraintes de torsion, puis reportés sur le plateau 25 permettant sa rotation et l'entraînement de la chaîne ou de la courroie de transmission.During the cycling of the cyclist, the radial ends 19, 21 of the cranks I 1 9 are subjected to radial forces and tangential efforts; the tangential forces exerted on the radial ends 19, 21 are transferred to the connecting shaft 31 which is subjected to torsional stresses, then transferred to the plate 25 allowing its rotation and the driving of the chain or belt of transmission.
Le pédalier 1 est remarquable en ce qu'il comprend des moyens d' assemblage en liaison pivot entre les extrémités axiales 15, 17 des manivelles 7, 9 et le cadre 3. Ces moyens d'assemblage sont agencés pour que les extrémités axiales 15, 17 des manivelles 7, 9 reçoivent les extrémités de la cage du cadre 3, lesdites extrémités du cadre 3 étant insérées dans les extrémités axiales 15, 17 des manivelles 7, 9, ce qui permet d'une part, au cadre 3 de supporter directement les efforts exercés sur les manivelles 7, 9, et d'autre part, de déplacer la position des extrémités axiales 15, 17 et des corps 11 des manivelles 7, 9, ceux-ci étant placés et intégrés dans la largeur de la cage du cadre 3. Cette conception du pédalier a pour fonction de reporter sur le cadre 3 les efforts radiaux auxquels sont soumis les extrémités radiales 19, 21 des manivelles au cours du pédalage. Une telle conception est remarquable en ce qu'elle soulage mécaniquement l'arbre de liaison 31 en limitant les efforts exercés sur celui-ci au cours du pédalage ; en effet, l'arbre de liaison est monté libre dans la cage 33 du cadre 3 du cycle et n'est soumis uniquement qu'à des contraintes de torsion correspondant au report des efforts tangentiels d' au moins l'une des manivelles sur le plateau 25. La réduction des contraintes sur l'arbre de liaison 31 du pédalier 1 aux seules contraintes de torsion, présente pour avantage de fabriquer ledit arbre 31 dans un matériau plus léger que l'acier, et on utilisera dans un mode préférentiel et non limitatif un alliage d'aluminium qui résiste convenablement aux contraintes de torsion.The pedal 1 is remarkable in that it comprises means of assembly in pivot connection between the axial ends 15, 17 of the cranks 7, 9 and the frame 3. These assembly means are arranged so that the axial ends 15, 17 of the cranks 7, 9 receive the ends of the cage of the frame 3, said ends of the frame 3 being inserted into the axial ends 15, 17 of the cranks 7, 9, which allows on the one hand, the frame 3 to directly support the forces exerted on the cranks 7, 9, and on the other hand, to move the position of the axial ends 15, 17 and the bodies 11 of the cranks 7, 9, these being placed and integrated in the width of the cage of the frame 3. This design of the pedal has the function of transferring to the frame 3 the radial forces which are subjected to the radial ends 19, 21 of the cranks during pedaling. Such a design is remarkable in that it mechanically relieves the connecting shaft 31 by limiting the forces exerted on it during pedaling; indeed, the connecting shaft is freely mounted in the cage 33 of the frame 3 of the cycle and is subjected only to torsional stresses corresponding to the transfer of the tangential forces of at least one of the cranks on the The reduction of the stresses on the connecting shaft 31 of the crankset 1 to torsional stresses alone has the advantage of manufacturing said shaft 31 in a material lighter than steel, and it will be used in a preferential and nonlimiting mode an aluminum alloy which is suitably resistant to torsional stresses.
Une telle conception d'assemblage en liaison pivot entre les manivelles 7, 9 et le cadre 3 est également remarquable en ce qu'elle permet de réduire l'entraxe « e », représenté sur la figure 1, séparant les extrémités axiales 15, 17 des manivelles ; en effet, les manivelles 7, 9 sont assemblées directement sur les extrémités latérales 35, 37 du cadre 3, ce qui permet de réduire la longueur de l'arbre de liaison 31 qui n'a plus à supporter les manivelles, celles-ci étant supportées par le cadre 3, ses seules fonctions étant de transmettre le mouvement de rotation sur le plateau 25 et de maintenir fixées les manivelles 7, 9 en respectant un angle de calage entre celles-ci.Such an assembly design in pivot connection between the cranks 7, 9 and the frame 3 is also remarkable in that it reduces the center distance "e", shown in Figure 1, separating the axial ends 15, 17 cranks; indeed, the cranks 7, 9 are assembled directly on the lateral ends 35, 37 of the frame 3, which makes it possible to reduce the length of the connecting shaft 31 which no longer has to support the cranks, these being supported by the frame 3, its only functions being to transmit the rotational movement on the plate 25 and to maintain fixed the cranks 7, 9 respecting a wedging angle between them.
Tels que représentés sur les figures 1 et 2, les moyens d'assemblage en liaison pivot des manivelles 7, 9 sur le cadre 3 sont dans un mode préférentiel et non limitatif constitués par deux bagues 39, 41 de montage sur le cadre 3, par des roulements 43, 45, par les extrémités axiales 15, 17, et par des moyens d'arrêt en translation des manivelles.As shown in FIGS. 1 and 2, the connecting means in pivot connection of the cranks 7, 9 on the frame 3 are in a preferred and nonlimiting mode constituted by two rings 39, 41 for mounting on the frame 3, by bearings 43, 45, by the axial ends 15, 17, and by translation stop means cranks.
Les bagues 39, 41 de montage sont fixées par vissage sur les extrémités latérales 35, 37 du cadre 3. Pour cela, les extrémités latérales 35, 37 sont taraudées et les bagues 39, 41 disposent d'une première extrémité 47, 49 filetée qui se termine par un épaulement 51, 53 .servant d'arrêt sur le cadre 3, les secondes extrémités 55, 57 des bagues 39, 41 reçoivent les cages internes 59, 61 des roulements 43, 45 et ont donc un diamètre correspondant, les cages externes 63, 65 des roulements 43, 45 étant quant à elles montées dans les extrémités axiales 15, 17 des manivelles 7, 9, qui disposent d'une forme alésée 67, 69 de diamètre correspondant à celui de la cage externe 63, 65 des roulements permettant de recevoir ladite cage externe. Les conditions de montage des roulements 43, 45 dans les alésages 67, 69 et sur les bagues 39, 41 respecteront de préférence les règles de l'art de montage des roulements connues de l'homme du métier.The mounting rings 39, 41 are screwed onto the lateral ends 35, 37 of the frame 3. For this, the lateral ends 35, 37 are threaded and the rings 39, 41 have a threaded first end 47, 49 which ends with a shoulder 51, 53.servant stopping on the frame 3, the second ends 55, 57 of the rings 39, 41 receive the internal stands 59, 61 of the bearings 43, 45 and therefore have a corresponding diameter, the cages 63, 65 of the bearings 43, 45 are in turn mounted in the axial ends 15, 17 of the cranks 7, 9, which have a bored form 67, 69 of diameter corresponding to that of the outer cage 63, 65 bearings for receiving said outer cage. The mounting conditions of the bearings 43, 45 in the bores 67, 69 and on the rings 39, 41 will preferably comply with the rules for fitting the bearings known to those skilled in the art.
Dans un mode préférentiel et non limitatif de conception qui est représenté sur les figures 1 et 2, l'arbre de liaison 31 est constitué par les extrémités axiales 15, 17 des deux manivelles 7, 9 qui se prolongent vers l'intérieur de la cage 33 du cadre 3 suivant l'axe de rotation 5, les deux prolongements 71, 73 disposant de moyens d'accouplement 75, 77 permettant de reporter l'effort de torsion sur le plateau entraînant sa rotation. Ces moyens d'accouplement 75, 77 sont mis en œuvre de préférence par des cannelures, l'un des prolongements 71 se terminant en forme d'arbre conique cannelé 75 constituant la partie mâle qui coopère avec la partie femelle constituée par le second prolongement 73 qui se termine en forme de moyeu conique cannelé 77.In a preferred and non-limiting embodiment of design which is shown in Figures 1 and 2, the connecting shaft 31 is constituted by the axial ends 15, 17 of the two cranks 7, 9 which extend towards the inside of the cage 33 of the frame 3 along the axis of rotation 5, the two extensions 71, 73 having coupling means 75, 77 for transferring the torsional force on the plate causing its rotation. These coupling means 75, 77 are preferably implemented by splines, one of the extensions 71 ending in the form of splined conical shaft 75 constituting the male part which cooperates with the female part constituted by the second extension 73 which terminates in the form of fluted conical hub 77.
Les moyens d'arrêt en translation des manivelles 7, 9 permettent de maintenir celles-ci assemblées et accouplées, garantissant le montage convenable du pédalier 1 sur le cadre 3 du cycle. Ces moyens sont obtenus par le prolongement 71 mâle de l'extrémité axiale 15 de la manivelle 7, c'est-à-dire l'arbre 75, ledit prolongement 71 étant creux et taraudé sur sa partie intérieure 79 qui reçoit une vis d'arrêt 81 pénétrant à l'intérieur 83 du prolongement femelle 73 de l'extrémité axiale 17 de la seconde manivelle 9, c'est-à-dire le moyeu 77, la tête 85 de la vis 81 venant en appui sur un épaulement 87 réalisé à l'intérieur 83 dudit prolongement 73, permettant de maintenir serrées entre-elles les deux extrémités axiales 15, 17 une fois la vis 81 assemblée sur la partie intérieure 79. Dans un mode préférentiel d'assemblage, le pédalier comprend une rondelle préformée 86 représentée sur les figures 1 et 2 qui permet de contraindre les roulements 43 et 45 et d'absorber les différentes tolérances de fabrication du cadre 3 et des manivelles 7 et 9.The translation stopping means of the cranks 7, 9 allow to maintain them assembled and coupled, ensuring proper fitting of the crankset 1 on the frame 3 of the cycle. These means are obtained by the extension 71 male of the axial end 15 of the crank 7, that is to say the shaft 75, said extension 71 being hollow and threaded on its inner portion 79 which receives a screw of stop 81 penetrating inside 83 of the female extension 73 of the axial end 17 of the second crank 9, that is to say the hub 77, the head 85 of the screw 81 bearing on a shoulder 87 made inside 83 of said extension 73, making it possible to keep the two axial ends 15, 17 clamped together when the screw 81 is assembled on the inner part 79. In a preferred embodiment of assembly, the pedal assembly comprises a preformed washer 86 shown in Figures 1 and 2 which makes it possible to constrain the bearings 43 and 45 and to absorb the different manufacturing tolerances of the frame 3 and the cranks 7 and 9.
Une telle conception de l'arbre de liaison 31 constitué directement par les extrémités axiales 15, 17 des manivelles 7, 9, contribue à réduire la quantité de matière utilisée pour concevoir le pédalier 1 objet de l'invention, et tend donc à diminuer sa masse. On pourra cependant envisager de concevoir séparément l'arbre de liaison qui s'intègre complètement à l'intérieur des extrémités axiales 15, 17 des manivelles 7, 9 et coopère, dans ce cas, avec des formes adaptées et usinées sur celles-ci, remplissant les mêmes fonctions que celles décrites précédemment .Such a design of the connecting shaft 31 formed directly by the axial ends 15, 17 of the cranks 7, 9, contributes to reducing the amount of material used to design the pedal 1 object of the invention, and therefore tends to reduce its mass. However, it will be possible to envisage separately designing the connection shaft which fits completely inside the axial ends 15, 17 of the cranks 7, 9 and cooperates, in this case, with adapted and machined shapes thereon, performing the same functions as those described above.
Les extrémités axiales 15, 17 comprennent des moyens d'indexation, non représentés sur les figures, qui permettent de caler angulairement les corps 11, 13 des manivelles 7, 9 à cent quatre vingt degrés l'un par rapport à l'autre. Ces moyens d'indexation sont, dans un mode préférentiel et non limitatif, constitués par les cannelures sur l'arbre 75 et sur le moyeu 77, les cannelures sur l'arbre 75 présentant par exemple au moins une dent de largeur différente des autres dents et les cannelures sur le moyeu 77 présentant un creux de largeur correspondante à celle de ladite dent, cette conception nécessitant de disposer ladite dent face audit creux pour pouvoir engrener les cannelures de l'arbre 75 dans celles du moyeu 77.The axial ends 15, 17 comprise indexing means, not shown in the figures, which make it possible to angularly wedge the bodies 11, 13 of the cranks 7, 9 at one hundred and eighty degrees relative to one another. These indexing means are, in a preferred and nonlimiting manner, constituted by the splines on the shaft 75 and on the hub 77, the splines on the shaft 75 having for example at least one tooth of different width from the other teeth and the grooves on the hub 77 having a hollow width corresponding to that of said tooth, this design requiring the said tooth to face said hollow to be able to mesh the grooves of the shaft 75 in those of the hub 77.
Le prolongement 71 sur l'extrémité axiale 15 de la manivelle 7 a un diamètre externe « Dl » qui, dans un mode préférentiel et non limitatif de conception, est égal au diamètre externe « D2 » du prolongement 73 sur l'extrémité axiale 17 de la manivelle 9. Ces diamètres « Dl, D2 » sont inférieurs au diamètre interne « D3 » sur les bagues 39, 41 afin de permettre l'insertion sans frottement des prolongements 71, 73 à l'intérieur desdites bagues 39, 41.The extension 71 on the axial end 15 of the crank 7 has an external diameter "Dl" which, in a preferred and non-limiting design, is equal to the external diameter "D2" of the extension 73 on the axial end 17 of the crank 9. These diameters "D1, D2" are smaller than the internal diameter "D3" on the rings 39, 41 to allow the frictionless insertion of the extensions 71, 73 inside said rings 39, 41.
Selon un mode préféré de réalisation, le plateau 25 est monté sur l'extrémité axiale 15, 17 de l'une des manivelles 1, 9 qui comprend un diamètre externe 88 à denture 89 destinée à recevoir la denture 91 réalisée à l'intérieur du plateau 25, ledit plateau étant arrêté en translation au moyen d'un écrou de serrage 93 qui se visse sur le filetage 95 également réalisé sur le diamètre externe 88. Ce mode de montage est remarquable en ce qu'il laisse la possibilité de régler angulairement le plateau 25 par rapport aux manivelles 7 et 9.According to a preferred embodiment, the plate 25 is mounted on the axial end 15, 17 of one of the cranks 1, 9 which comprises an outer diameter 88 with teeth 89 intended to receive the toothing 91 made inside the plate 25, said plate being stopped in translation by means of a clamping nut 93 which is screwed on the thread 95 also made on the outer diameter 88. This method of assembly is remarkable in that it leaves the possibility of adjusting the plate 25 angularly relative to the cranks 7 and 9.
Selon un mode de conception préféré, la denture 91 du plateau 25 a le même pas que la denture 89 sur l'une des manivelles 7, 9, ces dentures 91, 89 ne disposant d'aucun détrompeur afin de permettre la modification du calage du plateau 25 par rapport aux manivelles 7, 9 lorsque ledit plateau 25 est de forme non circulaire afin d'adapter au mieux le réglage du pédalier en fonction de la morphologie du cycliste et de son positionnement sur le cycle. Ce type de plateau est, par exemple, décrit dans la demande de brevet FR 05.00505.According to a preferred design, the toothing 91 of the plate 25 has the same pitch as the toothing 89 on one of the cranks 7, 9, these teeth 91, 89 having no polarizer to allow the modification of the setting of the plateau 25 relative to the cranks 7, 9 when said plate 25 is of non-circular shape in order to better adapt the setting of the pedal according to the morphology of the cyclist and its positioning on the cycle. This type of plate is, for example, described in the patent application FR 05.00505.
Dans un mode préférentiel de conception qui est représenté sur la figure 3, les pédales 23 du cycle sont montées en liaison pivot 97, et par assemblage direct, sur les extrémités radiales 19, 21 des manivelles 7, 9 ; la liaison pivot 97 étant constituée par au moins un roulement 99 qui est monté directement entre la pédale 23 et la manivelle 7, 9. L'extrémité de la pédale se termine par un axe creux 101, le diamètre externe 103 de l'axe 101 recevant la cage interne 105 du roulement 99, la cage externe 107 dudit roulement étant insérée dans l'alésage 109 réalisé sur l'extrémité radiale 19, 21 de la manivelle 7, 9. Le diamètre interne 111 de l'axe creux 101 de la pédale 23 est taraudé et reçoit par vissage une vis d'arrêt 113 en translation de la pédale 23 sur le roulement 99, l'épaulement 115 sur l'axe 101 et la tête 117 de la vis d'arrêt 111 étant en appui sur les extrémités latérales du roulement 99 lors du serrage de ladite vis 111. Cette conception est remarquable en ce qu'elle supprime toute pièce complémentaire d'assemblage, ce qui contribue par conséquent à alléger le pédalier 1 de la présente invention.In a preferred embodiment of design which is shown in Figure 3, the pedal 23 of the cycle are mounted in pivot connection 97, and by direct assembly on the radial ends 19, 21 of the cranks 7, 9; the pivot connection 97 being constituted by at least one bearing 99 which is mounted directly between the pedal 23 and the crank 7, 9. The end of the pedal ends with a hollow axis 101, the outer diameter 103 of the axis 101 receiving the inner race 105 of the bearing 99, the outer race 107 of said bearing being inserted into the bore 109 formed on the radial end 19, 21 of the crank 7, 9. The inner diameter 111 of the hollow shaft 101 of the pedal 23 is threaded and receives by screwing a stop screw 113 in translation of the pedal 23 on the bearing 99, the shoulder 115 on the axis 101 and the head 117 of the stop screw 111 being supported on the Lateral ends of the bearing 99 during the tightening of said screw 111. This design is remarkable in that it eliminates any additional assembly part, which therefore contributes to lighten the pedal 1 of the present invention.
D' autres mises en œuvre du pédalier à la portée de l'homme du métier pourront être envisagées sans pour autant sortir du cadre de la présente invention. Other implementations of the crankset within the reach of those skilled in the art may be envisaged without departing from the scope of the present invention.

Claims

REVENDICATIONS
1 - Pédalier (1) de cycle tel qu'un vélo, monté en rotation sur le cadre (3) dudit cycle suivant un axe de rotation (5) perpendiculaire au plan « P » du cadre (3) , ledit pédalier (1) se composant de deux manivelles (7, 9) disposées de part et d'autre du plan « P » du cadre (3), d'au moins un plateau (25) d'entraînement adjacent à l'une des manivelles (7, 9) et solidaire de celle-ci, lesdites manivelles (7, 9) recevant à leur extrémité radiale (19,21) une pédale (23) et étant solidarisées par leur extrémité axiale (15, 17) à un arbre de liaison (31) dont l'axe correspond à l'axe de rotation (5) du pédalier (1), ledit arbre de liaison (31) reportant sur le plateau (25) les efforts tangentiels exercés sur les manivelles (7, 9) au cours du pédalage entraînant la rotation dudit plateau (25) , caractérisé en ce que le montage du pédalier (1) sur le cycle est constitué par des moyens d'assemblage en liaison pivot entre les extrémités axiales (15, 17) des manivelles (7, 9) et le cadre (3) du cycle, lesdits moyens d'assemblage en liaison pivot étant constitués par deux bagues (39, 41) de montage fixées sur le cadre (3) , deux roulements (43, 45) , les extrémités axiales (15, 17) des deux manivelles (7, 9), et des moyens d'arrêt en translation des deux manivelles (7, 9), lesdits roulements (43, 45) ayant leur cage interne (59, 61) montée sur les bagues (39, 41), et leur cage externe (63, 65) montée sur les extrémités axiales (15, 17) des manivelles (7, 9), permettant d'une part de soulager mécaniquement l'arbre de liaison (31) et donc d' en • réduire les dimensions, et d'autre part de réduire l'entraxe « e » entre les extrémités axiales (15, 17) des manivelles (7, 9) .1 - Crankset (1) cycle such as a bicycle, mounted in rotation on the frame (3) of said cycle along an axis of rotation (5) perpendicular to the plane "P" of the frame (3), said pedal (1) consisting of two cranks (7, 9) arranged on either side of the "P" plane of the frame (3), of at least one drive plate (25) adjacent to one of the cranks (7, 9) and secured thereto, said cranks (7, 9) receiving at their radial end (19, 21) a pedal (23) and being secured by their axial end (15, 17) to a connecting shaft (31). ) whose axis corresponds to the axis of rotation (5) of the pedal (1), said connecting shaft (31) carrying on the plate (25) the tangential forces exerted on the cranks (7, 9) during the pedaling driving the rotation of said plate (25), characterized in that the mounting of the pedal (1) on the cycle is constituted by connecting means in pivot connection between the axial ends (15, 17) of the crank ls (7, 9) and the frame (3) of the cycle, said connecting means in pivot connection being constituted by two rings (39, 41) for mounting fixed on the frame (3), two bearings (43, 45). , the axial ends (15, 17) of the two cranks (7, 9), and means for stopping in translation the two cranks (7, 9), said bearings (43, 45) having their internal cage (59, 61). ) mounted on the rings (39, 41), and their outer cage (63, 65) mounted on the axial ends (15, 17) of the cranks (7, 9), on the one hand to relieve mechanically the shaft of connection (31) and thus to reduce dimensions by •, and secondly to reduce the center distance "e" between the axial ends (15, 17) of the crank (7, 9).
2 - Pédalier (1) de cycle selon la revendication précédente, caractérisé en ce que les extrémités axiales (15, 17) disposent d'une forme alésée (67, 69) destinée à recevoir la cage externe (63, 65) des roulements (43, 45) . 3 - Pédalier (1) de cycle selon l'une quelconque des revendications précédentes, caractérisé en ce que l'arbre de liaison (31) est constitué par les extrémités axiales (15, 17) des manivelles (7, 9), l'extrémité axiale (15) de l'une des manivelles (7) comprend un prolongement (71) en forme d'arbre conique cannelé (75) qui engrène avec la forme en moyeu conique cannelé (77) constituant le prolongement (73) de l'extrémité axiale (17) de la seconde manivelle (9) . 4 - Pédalier (1) de cycle selon la revendication précédente, caractérisé en ce que les extrémités axiales (15, 17) des manivelles (7, 9) comportent des moyens d'indexation constitués par l'arbre et le moyeu cannelés (75, 77) permettant de caler les corps (11, 13) des manivelles (7, 9) à cent quatre vingt degré (180°) l'un par rapport à l'autre.2 - Crankset (1) cycle according to the preceding claim, characterized in that the axial ends (15, 17) have a bored form (67, 69) for receiving the outer race (63, 65) of the bearings ( 43, 45). 3 - Crankset (1) cycle according to any one of the preceding claims, characterized in that the connecting shaft (31) is constituted by the axial ends (15, 17) of the cranks (7, 9), the axial end (15) of one of the cranks (7) comprises a splined conical shaft-shaped extension (71) which meshes with the fluted conical hub-shaped form (77) constituting the extension (73) of the axial end (17) of the second crank (9). 4 - Crankset (1) cycle according to the preceding claim, characterized in that the axial ends (15, 17) of the cranks (7, 9) comprise indexing means constituted by the splined shaft and hub (75, 77) for wedging the bodies (11, 13) of the cranks (7, 9) to one hundred and eighty degrees (180 °) relative to each other.
5 - Pédalier (1) de cycle selon l'une quelconque des revendications 3 ou 4, caractérisé en ce que les moyens d'arrêt en translation des manivelles (7, 9) sont constitués par une vis de blocage (81) qui est en appui dans le moyeu (73) cannelé de l'extrémité axiale (17) et se visse sur l'arbre (71) cannelé de l'extrémité axiale (15).5 - Crankset (1) cycle according to any one of claims 3 or 4, characterized in that the stop means in translation of the cranks (7, 9) are constituted by a locking screw (81) which is in support in the hub (73) grooved axial end (17) and is screwed on the shaft (71) grooved axial end (15).
6 - Pédalier (1) de cycle selon l'une quelconque des revendications précédentes, caractérisé en ce que l'extrémité axiale (15, 17) de l'une des manivelles (7, 9) comprend une denture (89) et un filetage (95), ladite denture (89) engrenant avec une denture (91) sur le plateau (25), et ledit filetage (95) recevant par vissage un écrou de serrage (93) du plateau (25) sur la manivelle (7, 9) .6 - Crankset (1) cycle according to any one of the preceding claims, characterized in that the axial end (15, 17) of one of the cranks (7, 9) comprises a toothing (89) and a thread (95), said toothing (89) meshing with a toothing (91) on the plate (25), and said thread (95) screwingly receiving a clamping nut (93) of the plate (25) on the crank (7, 9).
7 - Pédalier (1) de cycle selon l'une quelconque des revendications précédentes, caractérisé en ce que la pédale (23) est montée directement au moyen d'un roulement (99) dans l'extrémité radiale (19,21), contribuant à alléger ledit pédalier (1) .7 - Crankset (1) cycle according to any one of the preceding claims, characterized in that the pedal (23) is mounted directly by means of a bearing (99) in the radial end (19,21), contributing to lighten said pedal (1).
8 - Pédalier (1) de cycle selon la revendication précédente, caractérisé en ce que la cage externe (107) du roulement (99) est montée à l'intérieur de l'extrémité radiale (19, 21) de la manivelle (7, 9) et la cage interne (105) du roulement (99) est montée sur la pédale (23), l'arrêt de la pédale (25) sur la manivelle (7, 9) étant réalisé par une vis de blocage de la pédale (23) sur le roulement (99), le vissage étant réalisé directement sur ladite pédale (23) . 8 - Crankset (1) cycle according to the preceding claim, characterized in that the outer race (107) of the bearing (99) is mounted inside the end radial (19, 21) of the crank (7, 9) and the inner race (105) of the bearing (99) is mounted on the pedal (23), the stopping of the pedal (25) on the crank (7, 9) being formed by a screw locking the pedal (23) on the bearing (99), the screwing being performed directly on said pedal (23).
EP06831094A 2005-11-16 2006-11-09 Bicycle crankset Withdrawn EP1957352A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0511607A FR2893303A1 (en) 2005-11-16 2005-11-16 CYCLE PEDAL
PCT/FR2006/002494 WO2007057544A1 (en) 2005-11-16 2006-11-09 Bicycle crankset

Publications (1)

Publication Number Publication Date
EP1957352A1 true EP1957352A1 (en) 2008-08-20

Family

ID=36778149

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06831094A Withdrawn EP1957352A1 (en) 2005-11-16 2006-11-09 Bicycle crankset

Country Status (6)

Country Link
US (1) US20090045600A1 (en)
EP (1) EP1957352A1 (en)
JP (1) JP2009515767A (en)
CN (1) CN101365620A (en)
FR (1) FR2893303A1 (en)
WO (1) WO2007057544A1 (en)

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FR3007382B1 (en) * 2013-06-24 2019-04-12 Bernard Git PEDALER WITH AXIS CANNELE MULTI POSITIONS FOR CYCLES
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Also Published As

Publication number Publication date
WO2007057544A1 (en) 2007-05-24
JP2009515767A (en) 2009-04-16
CN101365620A (en) 2009-02-11
US20090045600A1 (en) 2009-02-19
FR2893303A1 (en) 2007-05-18

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