FR2840874A1 - Power transmission device for bicycle includes two levers with pedals at one end and rotating arms defining on each lever a first and second crank offset by 180 degrees - Google Patents
Power transmission device for bicycle includes two levers with pedals at one end and rotating arms defining on each lever a first and second crank offset by 180 degrees Download PDFInfo
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- FR2840874A1 FR2840874A1 FR0216683A FR0216683A FR2840874A1 FR 2840874 A1 FR2840874 A1 FR 2840874A1 FR 0216683 A FR0216683 A FR 0216683A FR 0216683 A FR0216683 A FR 0216683A FR 2840874 A1 FR2840874 A1 FR 2840874A1
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- 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
- B62M1/00—Rider propulsion of wheeled vehicles
- B62M1/24—Rider propulsion of wheeled vehicles with reciprocating levers, e.g. foot levers
- B62M1/26—Rider propulsion of wheeled vehicles with reciprocating levers, e.g. foot levers characterised by rotary cranks combined with reciprocating levers
Abstract
Description
DISPOSITIF DE MISE EN MOWEMENT D'UN VEHICULE MU PAR LA FORCEFORCE MOVEMENT DEVICE OF A VEHICLE
MUSCULAIRE NOTAMMENT D'UNE BICYCLETTE MUSCULAR, ESPECIALLY OF A BICYCLE
DOMAINE TECHNIQUE D'APPLICATION DE L' INVENTION TECHNICAL FIELD OF APPLICATION OF THE INVENTION
L' invention concerne le domaine des vehicules mus notamment par la force musculaire comme par exemple une bicyclette et plus particulierement les adaptations permettant d' en realiser la The invention relates to the field of vehicles driven in particular by muscular force such as for example a bicycle and more particularly the adaptations making it possible to carry out the same.
mise en mouvement avec une meilleure gestion de lteffort ou de la puissance developpee. setting in motion with better management of effort or developed power.
ETAT DE LA TECHNIQUESTATE OF THE ART
Aujourd'hui, la plupart des vehicules mus par la force physique comme les cycles, les << Pedalos >>, voiturettes, le vent au moyen d'un systeme a pedalier. Le pedalier classique actuel comprend un plateau dense sur lequel est fixe de facon rigide a partir d'un arbre central les premieres extremites de manivelles, positionnees l'une par rapport a l'autre en opposition de phase, aux deuxiemes extremites desquelles se trouvent les pedales sur lesquelles appuie au moyen de ses pieds, 1'utilisateur du vehicule permettant de transformer le mouvement alternatif de ses jambes en Today, most vehicles driven by physical force such as cycles, "Pedalos", carts, the wind by means of a pedal system. The current classic crankset includes a dense chainring on which is rigidly fixed from a central shaft the first ends of cranks, positioned relative to each other in phase opposition, at the second ends of which are the pedals which are supported by their feet, the user of the vehicle making it possible to transform the reciprocating movement of his legs into
mouvement de rotation autour audit arbre. rotational movement around said shaft.
Dans le cas d'une bicyclette, ce mouvement de rotation est transmis au moyen d'une cha^ne reliant ledit plateau dense a au moins un pigeon arriere lie en rotation a la roue arriere. Cette roue arriere etant en contact avec le sol, sa mise en mouvement declenche la mise en mouvement du vehicule et de son passager. Le systeme a pedalier classique a pour principal inconvenient de limiter lteffort a la longueur des manivelles reliant l' exe de rotation du plateau aux pedales. En effet, une augmentation de la longueur des manivelles provoquerait une obligation pour l'utilisateur de quitter sa selle pour atteindre le point mort teas et une flexion du genou tres desagreable pour atteindre le point mort haut ce qui, etant donne que les pedales vent disposees a 180 I'une de l'autre, serait pratiquement impossible. A contrario, une diminution de la longueur des manivelles aurait pour consequences une diminution du bras de levier et In the case of a bicycle, this rotational movement is transmitted by means of a chain connecting said dense plate to at least one rear pigeon linked in rotation to the rear wheel. This rear wheel being in contact with the ground, setting it in motion sets in motion the vehicle and its passenger. The main disadvantage of the classic pedal system is to limit the effort to the length of the cranks connecting the rotation exe of the chainring to the pedals. Indeed, an increase in the length of the cranks would cause an obligation for the user to leave his saddle to reach the dead center teas and a very unpleasant knee flexion to reach the top dead center which, given that the wind pedals are arranged 180 from one another would be practically impossible. Conversely, a reduction in the length of the cranks would result in a reduction in the lever arm and
done une augmentation de lteffort necessaire a la mise en mouvement du vehicule. therefore an increase in the effort required to set the vehicle in motion.
En consequence, la bicyclette ainsi que tous les vehicules mus par la force physique sur la base d'un pedalier, adoptent un compromis entre la taille des membres inferieurs de leur utilisateur et ['effort Consequently, the bicycle as well as all vehicles powered by physical force on the basis of a crankset, adopt a compromise between the size of the lower limbs of their user and ['effort
qu'ils peuvent et doivent fournir pour leur deplacement. that they can and must provide for their travel.
Un autre inconvenient du systeme pedalier classique se situe au passage des pedales au niveau de leur point mort haut et teas qui necessite un effort supplementaire dans le cadre du mouvement circulaire du pedalier. Another disadvantage of the classic pedal system is located at the passage of the pedals at their top dead center and teas which requires additional effort as part of the circular movement of the pedal.
DESCRIPTION DE L'INVENTIONDESCRIPTION OF THE INVENTION
Partant de cet etat de fait, le demandeur a mene des recherches a des fins d'une meilleure exploitation de ['effort musculaire pour la mise en mouvement d'un vehicule. Ces recherches ont about) a la conception d'un dispositif particulierement original pouvant s'adapter sur des systemes deja existants sans grandes modifications ou pouvant s'installer directement lors de la fabrication d'un On the basis of this fact, the applicant has carried out research for the purpose of better exploitation of the muscular effort for setting in motion a vehicle. These researches resulted in the design of a particularly original device which can be adapted to already existing systems without major modifications or which can be installed directly during the manufacture of a
vehicule specifiquement concu a cet effet. vehicle specifically designed for this purpose.
Ce dispositif a pour fonction de mieux lineariser les efforts necessaires a la mise en mouvement et d'en diminuer l'intensite. Selon ['invention, ce dispositif de mise en mouvement est remarquable en ce qu' il est constitue de deux leviers qui, comportant chacun a une premiere extremite un organe de commande de type pedale monte libre en rotation, presentent a leur deuxieme extremite et entre leurs deux extremites sur le reste de leur longueur, un point d'appui et un arbre de rotation lequel definit sur chaque levier une premiere et une deuxieme manivelles disposees, d'un levier par rapport a 1'autre, a sensiblement 180 I'une de l'autre et tournant chacune selon un m8me premier axe de rotation, les deux leviers etant montes au moins pivotant et, disposes par rapport a leur point d'appui, leur arbre de rotation et l'un par rapport a l'autre, de facon a ce que ['action sur les pedales presentes a leur premiere extremite, assure le pivotement alternatif desdits leviers dans un mouvement en balancier The function of this device is to better linearise the forces necessary for setting in motion and to decrease their intensity. According to the invention, this device for setting in motion is remarkable in that it consists of two levers which, each having at a first end a pedal-type control member mounted to rotate freely, have at their second end and between their two ends over the rest of their length, a fulcrum and a rotation shaft which defines on each lever a first and a second cranks arranged, of a lever relative to the other, at substantially 180 to one on the other and each rotating along the same first axis of rotation, the two levers being mounted at least pivoting and, arranged relative to their fulcrum, their shaft of rotation and one relative to the other, so that the action on the pedals present at their first end, ensures the alternating pivoting of said levers in a pendulum movement
pour entramer en rotation lesdites manivelles. for rotating said cranks.
Ce nouveau systeme de pedalier n'est plus limite a la longueur des manivelles du pedalier classique puisqu'il propose des leviers dont l'axe de pivotement n'est plus constitue que par l'axe de rotation du moyen d'entranement en rotation. Ainsi, le demandeur desolidarise la longueur des manivelles d'un pedalier classique de son axe de rotation en creant des leviers intermediaires ayant leur propre axe de pivotement qui peut se decaler de 1'axe de rotation des manivelles. Cette absence de limitation permet d'envisager des bras de levier d'une longueur autorisant un coefficient multiplicateur largement superieur a celui propose par les manivelles d'un pidalier classique. Le rendement de ce type de moyen de mise en mouvement en est done grandement ameliore. Selon une caracteristique particulierement avantageuse de ['invention, les points d'appui de chaque levier vent constitues chacun par une articulation reunissant une liaison glissiere et une liaison pivot autorisant la rotation de la liaison glissiere selon un meme deuxiime axe de rotation Cette caracteristique permet de guider le mouvement des leviers dont la liaison avec une manivelle requiert la possibilite d'un mouvement longitudinal tout en gardant la possibilite d'offrir un point d'appui au levier pour agir en tent que bras de levier. Ces points d'appui constitues chacun par une liaison glissiere associee a une liaison de type pivot ont d'un levier par rapport a l'autre le meme axe de rotation. Cette caracteristique a en outre pour avantage de prevoir plusieurs possibilites de mise en muvre en creant un deuxieme axe de rotation, le premier et le deuxieme axes de rotation pouvant se placer indifferemment a la deuxieme extremite et entre les deux extremites du levier. Ainsi, ces points de pivotement etfou d'appui vent eux-m8mes dependents d'un axe de rotation ce qui participe a une meilleure gestion de la trajectoire des premieres extremites de levier. Ces possibilites peuvent etre utilisees notamment dans le cadre This new crankset system is no longer limited to the length of the cranks of the conventional crankset since it offers levers whose pivot axis is no longer formed except by the axis of rotation of the rotary drive means. Thus, the applicant dissociates the length of the cranks of a conventional crankset from its axis of rotation by creating intermediate levers having their own pivot axis which can be offset from the axis of rotation of the cranks. This absence of limitation makes it possible to envisage lever arms of a length allowing a multiplying coefficient largely greater than that proposed by the cranks of a conventional pidalier. The efficiency of this type of means of setting in motion is therefore greatly improved. According to a particularly advantageous characteristic of the invention, the support points of each wind lever each constituted by an articulation uniting a slide link and a pivot link allowing the rotation of the slide link along a same second axis of rotation This characteristic makes it possible to guide the movement of the levers whose connection with a crank requires the possibility of a longitudinal movement while retaining the possibility of offering a fulcrum for the lever to act as a tent as a lever arm. These support points each constituted by a sliding link associated with a pivot type link have a lever relative to the other the same axis of rotation. This characteristic also has the advantage of providing several possibilities for implementation by creating a second axis of rotation, the first and second axes of rotation being able to be placed indifferently at the second end and between the two ends of the lever. Thus, these pivot points and fou wind support themselves depend on an axis of rotation which contributes to better management of the trajectory of the first lever ends. These possibilities can be used especially in the context
d'une installation d'une bicyclette existante. an installation of an existing bicycle.
Ainsi, selon d'autres caracteristiques particulierement avantageuses qui seront detaillees ci apres, le dispositif de ['invention peut avantageusement etre installe sans grande modification sur une bicyclette existante comportant un dispositif de mise en mouvement mis en aeuvre par un systeme pedalier classique. L'association du dispositif de ['invention a un pedalier classique anquel auraient ete retirees les manivelles et les pedales d'origine a pour avantage d'utiliser le systeme de vitesse initial tout en proposant une mise en mouvement requerant un effort moindre. Ainsi, le demandeur a calcule qu'a effort egal une bicyclette classique adoptant le dispositif de l' invention pouvait atteindre une Thus, according to other particularly advantageous characteristics which will be detailed below, the device of the invention can advantageously be installed without much modification on an existing bicycle comprising a device for setting in motion implemented by a conventional pedal system. The association of the device of the invention with a conventional crankset which would have been removed from the original cranks and pedals has the advantage of using the initial speed system while proposing a setting in motion requiring less effort. Thus, the applicant has calculated that with equal effort a conventional bicycle adopting the device of the invention could reach a
vitesse trots fois superieure ou permettre une utilisation prolongee du fait de l'economie d'energie. speed three times higher or allow prolonged use due to energy saving.
Aussi, I'ensemble des moyens de locomotion non polluant en trouve leur utilite accrue de par les economies d'effort realisees. De meme, dans la mesure ou le mouvement alternatif des leviers serait mis en aeuvre par um moyen motorise, I'economie d'energie serait notable et la pollution s'en Also, all of the non-polluting means of locomotion find their usefulness increased by the savings in effort. Similarly, to the extent that the reciprocating movement of the levers would be implemented by a motorized means, the energy saving would be significant and the pollution would be
trouverait diminuee.would find it diminished.
En effet, ['invention venant d'etre decrite dans ses aspects les plus generaux, d'autres caracteristiques et d'autres avantages techniques appara^tront plus precisement a la lecture du texte qui suit decrivant en regard des dessins annexes et a titre d'exemple non limitatif, un ou plusieurs modes de realisation du dispositif de mise en mouvement d'un vehicule mu par la force musculaire applique a In fact, the invention having just been described in its most general aspects, other characteristics and other technical advantages will appear more precisely on reading the following text describing with reference to the accompanying drawings and by way of non-limiting example, one or more embodiments of the device for setting in motion a vehicle driven by muscular force applied to
une bicyclette.a bicycle.
BREVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS
La figure 1 est une vue schematique de cote d'un mode de realisation du dispositif de ['invention installe sur une bicyclette, La figure 2 est une vue d'ensemble d'une bicyclette sur laquelle a etd installe un deuxieme mode de realisation du dispositif de ['invention La figure 3 est une vue schematique de dessus du mode de realisation illustre en figure 2, La figure 4a est une vue schematique de cote d'un detail lie a la deuxieme extremite des leviers, La figure 4b est une vue schematique de dessus du detail illustre en figure 4a, La figure 5a est une vue schematique de cAte d'un mode de realisation d'un detail lie a la mise en couvre de s man ive l le s, La figure Sb est une vue schematique de dessus du detail illustre en figure Sa, La figure 6a est une vue schematique de cate d'un autre mode de realisation d'un detail lie a la mise en aeuvre des manivelles, La figure 6b est une vue schematique de dessus du detail illustre en figure 6a, La figure 7a est une vue schematique de cote d'un autre detail du mode de realisation illustre aux figures 1 et 2 lie a la mise en mouvement du plateau de la bicyclette, Figure 1 is a schematic side view of an embodiment of the device of the invention installed on a bicycle, Figure 2 is an overview of a bicycle on which has etd installed a second embodiment of the device of the invention FIG. 3 is a schematic top view of the embodiment illustrated in FIG. 2, FIG. 4a is a schematic side view of a detail linked to the second end of the levers, FIG. 4b is a view schematic from above of the detail illustrated in FIG. 4a, FIG. 5a is a schematic side view of an embodiment of a detail linked to the setting of covers of the hand, FIG. Sb is a schematic view from above of the detail illustrated in FIG. Sa, FIG. 6a is a schematic view of another embodiment of a detail linked to the use of the cranks, FIG. 6b is a schematic view from above of the illustrated detail in Figure 6a, Figure 7a is a schematic side view of u n another detail of the embodiment illustrated in FIGS. 1 and 2 linked to the setting in motion of the plate of the bicycle,
La figure 7b est une vue schematique de dessus du detail illustre en figure 7a. Figure 7b is a schematic top view of the detail illustrated in Figure 7a.
DESCRIPTION APPllYEE SUR LES DESSINS DESCRIPTION APPLIED TO THE DRAWINGS
Comme illustre sur les dessins des figures 1 et 2, le dispositif reference D dans son ensemble de mise en mouvement d'un vehicule est installe sur une bicyclette classique referencee B du type de celle dont le cadre forme un plan de symetrie vertical. Les padres d ' elements constituti fs du di sposit if s D vent disposees de part et d'autre du plan vertical forme par le cadre de la bicyclette B. Ainsi, le dispositif D comprend deux leviers lOOa et lOOb disposes de part et d'autre du plan de symetrie forme par le cadre 200 de la bicyclette B. Sur une premiere extremite l lOa et l lOb de ces leviers lOOa et lOOb vent montes libres en rotation des organes de commande de type pedale llla et lllb permettant a l'utilisateur de la bicyclette B d'actionner lesdits leviers lOOa et lOOb. Comme illustre sur le dessin de la figure 3, les deuxiemes extremites 120a et 120b desdits leviers lOOa et lOOb vent liees respectivement a une articulation 31 Oa et 31 Ob formant point d'appui pour former un bras de levier, ces points d'appoi etant disposes de part et d'autre du plan de symetrie vertical forme par le cadre 200 de la bicyclette B. Ces deux articulations 310a et 310b, tournent chacune selon un meme As illustrated in the drawings of FIGS. 1 and 2, the device reference D as a whole for setting in motion a vehicle is installed on a conventional bicycle referenced B of the type whose frame forms a plane of vertical symmetry. The padres of constituent elements of the di sposit if s D wind arranged on either side of the vertical plane formed by the frame of the bicycle B. Thus, the device D comprises two levers lOOa and lOOb arranged on both sides other of the plane of symmetry formed by the frame 200 of the bicycle B. On a first extremity l lOa and l lOb of these levers lOOa and lOOb wind mounted freely in rotation of the pedal type control members llla and lllb allowing the user of bicycle B to operate said levers 100a and 100b. As illustrated in the drawing in FIG. 3, the second ends 120a and 120b of said levers 100a and 100b are linked respectively to a joint 31 Oa and 31 Ob forming a fulcrum to form a lever arm, these points of appeal being arranged on either side of the vertical plane of symmetry formed by the frame 200 of the bicycle B. These two articulations 310a and 310b, each rotate according to the same
deuxieme axe de rotation reference A2. second axis of rotation reference A2.
Lesdits leviers lOOa et lOOb vent en outre, chacun montes pivotant respectivement a l'extremite d'une premiere et d'une deuxieme manivelles 410a et 410b, disposees sensiblement a 180 I'une de l'autre et tournant chacune selon un meme premier axe de rotation reference A1 de facon a ce que ['action sur les pedales 11 la et 11 lb presentes a la premiere extremite desdits leviers lOOa et lOOb assure le pivotement alternatif desdits leviers dans un mouvement en balancier pour que ce mouvement prenant appoi sur les articulations 310a et 310b entraine en rotation lesdites premiere 410a Said levers 100a and 100b furthermore, each mounted pivoting respectively at the end of a first and of a second cranks 410a and 410b, arranged substantially at 180 from one another and each rotating along the same first axis rotation reference A1 so that the action on the pedals 11a and 11b present at the first end of said levers 100a and 100b ensures the pivoting of said levers in a pendulum movement so that this movement takes hold on the joints 310a and 310b rotates said first 410a
et deuxieme 410b manivelles.and second 410b cranks.
Comme illustrde, la bicyclette B sur laquelle est installe le dispositif D de ['invention comportant un dispositif de mise en mouvement de type pedalier classique avec deux pedales d'origine liees chacune initialement a l'extremite de deux manivelles d'origine dont la deuxieme 2s extremite est liee a un axe reference A3 et un arbre de rotation d'origine solidaire d'un plateau 210 d'entramement d'une chaine d'origine C transmettant le mouvement de rotation a au moins une roue dentee liee d'origine a une roue de la bicyclette. Comme illustre, ce plateau 210 comporte plusieurs roues dentees qui viennent selectivement entrainer selon la vitesse enclenchee par l'utilisateur, un des As illustrated, the bicycle B on which is installed the device D of the invention comprising a movement device of the classic crankset type with two original pedals each initially linked at the end of two original cranks, the second of which 2s end is linked to a reference axis A3 and an original rotation shaft secured to a plate 210 entramement of an original chain C transmitting the rotational movement to at least one toothed wheel linked originally to a bicycle wheel. As illustrated, this plate 210 comprises several toothed wheels which selectively drive according to the speed set by the user, one of the
pigeons 220 situes a 1'arriere et solidaire de la roue arriere 230. pigeons 220 located at the rear and integral with the rear wheel 230.
Selon le mode de realisation illustre en fgure 5a et Sb, chaque manivelle est liee a un arbre de According to the embodiment illustrated in figure 5a and Sb, each crank is linked to a shaft of
rotation separe et dispose de part et d'autre audit plan vertical et adoptant le meme axe de rotation A1. rotation separates and has on either side of said vertical plane and adopting the same axis of rotation A1.
En outre, selon une caracteristique particulierement avantageuse de ['invention, chaque manivelle 410a, 410b est constituee d'un plateau 410a', 410b' qutelles mettent en mouvement de rotation, In addition, according to a particularly advantageous characteristic of the invention, each crank 410a, 410b consists of a plate 410a ', 410b' which are set in rotation,
plateau 410a', 410b' qui met en mouvement l'arbre de rotation d'une des roues dentees d'origine. plate 410a ', 410b' which sets in motion the rotation shaft of one of the original toothed wheels.
Ainsi, selon le detail de mode de realisation illustre par les dessins de$ figures 6a et 6b, chaque arbre de rotation 413a est mis en mouvement par lesdites manivelles 410a et est lie a au moins un plateau 410a' qui, ici au moyen d'une chame Ca, met en mouvement l'arbre de rotation d'une des roues dentees d'origine. Selon le mode de realisation illustre, le plateau 410a' forme un soul-ensemble avec l'arbre 413a et tourne par rapport a un axe A1 en etant guide par des roulements 411a. Le mouvement en balancier du levier lOOa est transmis au moyen de la manivelle 410a dont 1'axe est Thus, according to the detail of embodiment illustrated by the drawings of $ Figures 6a and 6b, each rotation shaft 413a is set in motion by said cranks 410a and is linked to at least one plate 410a 'which, here by means of a Ca chain, sets in motion the rotation shaft of one of the original toothed wheels. According to the illustrated embodiment, the plate 410a 'forms a soul-assembly with the shaft 413a and rotates with respect to an axis A1 while being guided by bearings 411a. The pendulum movement of the lever 100a is transmitted by means of the crank 410a, the axis of which is
legerement excentre de l'axe A1 de rotation du plateau. slightly offset from the axis A1 of rotation of the plate.
Comme illustre en figure 3, chaque arbre de rotation 413a et 413b mis en mouvement par lesdites manivelles 410a et 410b est solidaire d'un plateau dense 410a' qui entraine en mouvement au moyen d'une chame Ca et Cb, la roue dentee centrale d'origine 210 par 1'intermediaire de roues dentees auxiliaires 510a et 510b liees a cette derriere disposees de part et d'autre du cadre 200 et du As illustrated in FIG. 3, each rotation shaft 413a and 413b set in motion by said cranks 410a and 410b is secured to a dense plate 410a 'which drives in motion by means of a chain Ca and Cb, the central toothed wheel d origin 210 by means of auxiliary toothed wheels 510a and 510b linked to the latter arranged on either side of the frame 200 and of the
plateau 210.tray 210.
Bien que le mode de realisation prefere utilise une chame pour l'entranement en rotation, d'autres solutions comme une courroie ou directement par contact vent possibles pour transmettre ledit Although the preferred embodiment uses a chain for rotary drive, other solutions such as a belt or directly by wind contact are possible for transmitting said
mouvement en rotation.rotating movement.
Conformement a ['invention, les axes de rotation A1 des manivelles et A2 des points d'appui vent paralleles aux axes de rotation des roues de ladite bicyclette B et a celui A3 du plateau central 210 In accordance with the invention, the axes of rotation A1 of the cranks and A2 of the wind support points parallel to the axes of rotation of the wheels of said bicycle B and to that of the central plate 210
de cette derriere.from behind.
La description des elements cinematiques mettant en aeuvre le mouvement du dispositif D de The description of the kinematic elements implementing the movement of the device D of
['invention est decrit sur la base des figures de detai1s. [The invention is described on the basis of the figures of detai1s.
Comme illustre sur les dessins des figures 4a et 4b, chaque levier ici lOOa est lie au niveau de sa deuxieme extremite 120a a un point d'appui 310a constitue chacun par une articulation reunissant une liaison glissiere et une liaison pivot autorisant la rotation de la liaison glissiere selon un m8me deuxieme axe de rotation A2. Cette articulation 310a est selon une caracteristique particulierement avantageuse de ['invention, constituee d'un fourreau de guidage lineaire 31 la assurant le guidage des mouvements en translation de va-et-vient (i llustres la double fleche) ass ocie a un arbre de rotation d'axe perpendiculaire assurant la mobilite du fourreau de guidage 311a lors du mouvement en balancier du levier lOOa. Cet arbre de rotation 312a est fixe au cadre 200 au niveau d'une des branches de la fourche arriere de la bicyclette B. L'utilisation d'un fourreau de guidage lineaire monte pivotant pour la mise en cuvre des points d'appui necessaires a la realisation des bras de levier permet d'assurer la stabilite du systeme, un enroulement plus facile et un taux d'utilisation plus important sans risque de cassure. L'axe de rotation A2 des points d'appui fournis par cette articulation est As illustrated in the drawings of FIGS. 4a and 4b, each lever here lOOa is linked at its second end 120a to a fulcrum 310a each constituted by an articulation joining a slide link and a pivot link authorizing the rotation of the link slide along the same second axis of rotation A2. This articulation 310a is according to a particularly advantageous characteristic of the invention, consisting of a linear guide sleeve 31 ensuring it guiding the movements in back-and-forth translation (i llustres the double arrow) associated with a shaft of rotation of perpendicular axis ensuring the mobility of the guide sleeve 311a during the pendulum movement of the lever 100a. This rotation shaft 312a is fixed to the frame 200 at the level of one of the branches of the rear fork of the bicycle B. The use of a linear guide sleeve mounts pivotally for setting in place the support points necessary for the realization of the lever arms ensures the stability of the system, easier winding and a higher utilization rate without risk of breakage. The axis of rotation A2 of the support points provided by this articulation is
eloigne au maximum des pedales 11 la et 11 lb afin d'assurer 1'effet de levier maximum. move as far away from 11 la and 11 lb pedals as possible to ensure maximum leverage.
Un axe de rotation susceptible d'8tre utilise comme axe de rotation desdits points d'appui est celui de la roue arriere. Ainsi, selon le mode de realisation illustre en figures 2 et 3, 1'axe de rotation An axis of rotation capable of being used as the axis of rotation of said support points is that of the rear wheel. Thus, according to the embodiment illustrated in Figures 2 and 3, the axis of rotation
A2 des points d'appui se confond avec 1'axe de rotation de la roue arriere. A2 of the support points merges with the axis of rotation of the rear wheel.
Conformement a ['invention, chaque point d'appui 310a et 310b est lie a un arbre de rotation separe et dispose de part et d'autre audit plan vertical et adoptant deux a deux le m8me axe de rotation A2 comme illustre sur le dessin de la figure 3. Ici, le fourreau 311a ayant fonction de point d'appui tourne autour d'un arbre 312a fixe par rapport au cadre 200 et coaxial a l'axe de rotation A2. Le dispositif D reprenant la structure symetrique de la bicyclette B et dependent de la presence de la roue passant entre les deux branches de la fourche arriere du cadre 200 de ladite bicyclette, la deuxieme articulation non illustree est egalement constituee d'un fourreau pivotant autour d'un arbre fixe a In accordance with the invention, each fulcrum 310a and 310b is linked to a separate rotation shaft and has on either side of said vertical plane and adopting in pairs the same axis of rotation A2 as illustrated in the drawing of Figure 3. Here, the sleeve 311a having a fulcrum function rotates around a shaft 312a fixed relative to the frame 200 and coaxial with the axis of rotation A2. The device D taking up the symmetrical structure of the bicycle B and dependent on the presence of the wheel passing between the two branches of the rear fork of the frame 200 of the said bicycle, the second joint, not illustrated, is also constituted by a sheath pivoting around 'a fixed tree has
l'autre branche de fourche arriere et coaxial au meme axe de rotation A2. the other fork leg rear and coaxial with the same axis of rotation A2.
Selon un autre mode de realisation d'un detail lie a la mise en movre des manivelles illustre en figures 5a et Sb, chaque levier lOOa est lie entre ses deux extremites a une manivelle 410a qui est ici constituee par un plateau dense tournant 410a' autour d'un axe A1. Ce plateau 410a' est monte sur roulement a billes 41 la equipe d'un graisseur 412a et fixe au cadre 200 au niveau de la fourche arriere de la bicyclette B entre le plateau central 210 et le point d'appui constituent ['articulation 310a. Ce plateau dense 410a' est eloigne au minimum du plateau 310a en ayant un axe de rotation parallele et situee dans le meme plan vertical touj ours pour assurer un effet de levier maximal. Cette distance entre A1 et A2 est neanmoins suffisante pour assurer une bonne rotation, une bonne stabilite ainsi qutun bon point d'appui. Pour autant, les axes A1 et A2 ne vent pas trop distants pour que le basculement alternatif des leviers lOOa et lOOb ne soit pas trop important en bout de course au niveau des pedales llla et lllb notamment pour une bicyclette standard. De meme, les distances vent calculees de facon a ce que l'utilisateur ait une amplitude de mouvements equivalente a celle According to another embodiment of a detail linked to the setting in motion of the cranks illustrated in FIGS. 5a and Sb, each lever 100a is linked between its two ends to a crank 410a which is here constituted by a dense turntable 410a 'around of an axis A1. This plate 410a 'is mounted on ball bearing 41 fitted with a lubricator 412a and fixed to the frame 200 at the rear fork of the bicycle B between the central plate 210 and the fulcrum constitute the articulation 310a. This dense plate 410a 'is moved away from the plate 310a as a minimum by having a parallel axis of rotation and located in the same vertical plane always to ensure maximum leverage. This distance between A1 and A2 is nevertheless sufficient to ensure good rotation, good stability and a good fulcrum. However, the axes A1 and A2 do not wind too far apart so that the alternating tilting of the levers lOOa and lOOb is not too great at the end of travel at the level of the pedals llla and lllb in particular for a standard bicycle. Likewise, the wind distances calculated in such a way that the user has an amplitude of movements equivalent to that
necessaire a un pedalier classique.necessary for a classic crankset.
Conformement a ['invention, le point d'appui 310a et le plateau 410a' respectivement lies a l'extremite et a la partie centrale d'un meme levier lOOa vent orientes angulairement l'un par rapport a In accordance with the invention, the fulcrum 310a and the plate 410a 'respectively connected to the end and to the central part of the same lever 100a wind angularly oriented one with respect to
I'autre afin d'assurer un point d'appui continu au mouvement de balancier desdits leviers. The other in order to provide a continuous fulcrum for the pendulum movement of said levers.
Selon le mode de realisation illustre aux figures 5a et 5b, le plateau 410a' constituent la manivelle 410a tourne autour d'un arbre 413a fixe par rapport au cadre 200 et coaxial a l'axe de rotation A1. Le dispositif D reprenant la structure symetrique de la bicyclette B et dependent de la presence de la roue passant entre les deux branches de la fourche arriere du cadre 200 de ladite bicyclette, la deuxieme manivelle 410b non illustree en detail est egalement constituee d'un plateau dense tournant autour d'un arbre fixe a l'autre branche de fourche arriere et coaxial au m8me premier axe de rotation A1 comme illustre par le dessin de la figure 3. Comme illustre, ce plateau 410a' est dense et entra^ne en mouvement une chaine auxiliaire Ca independante de la cha'^ne d'origine C reliant According to the embodiment illustrated in Figures 5a and 5b, the plate 410a 'constitute the crank 410a rotates around a shaft 413a fixed relative to the frame 200 and coaxial with the axis of rotation A1. The device D taking up the symmetrical structure of the bicycle B and dependent on the presence of the wheel passing between the two branches of the rear fork of the frame 200 of the said bicycle, the second crank 410b not illustrated in detail also consists of a plate dense rotating around a shaft fixed to the other rear fork branch and coaxial to the same first axis of rotation A1 as illustrated by the drawing in FIG. 3. As illustrated, this plate 410a ′ is dense and causes it to move an auxiliary chain Ca independent of the original chain C connecting
le plateau central 210 aux pigeons arrieres 220. the central tray 210 with rear pigeons 220.
Comme illustre sur les dessins des figures 7a et 7b, I'arbre de rotation audit plateau central d'origine 210 tournant autour de 1'axe A3, est muni de part et d'autre audit plan vertical de roues dentees 510a et 510b mises en mouvement par le mouvement imprime aux plateaux dont senl 410a' est illustre en detail correspondent respectivement aux premiere 410a et deuxieme 410b manivelles disposees de part et d'autre audit plan vertical. Ces roues dentees ou plateaux auxiliaires 510a et 510b vent mis en mouvement au moyen de cha'^nes auxiliaires Ca et Cb. Ainsi, ces deux cha'^nes transmettent le mouvement de rotation imprime de part et d'autre du cadre aux premiere et deuxieme manivelles par le mouvement des leviers lOOa et lOOb pivotant au niveau non senlement de leur deuxieme extremite 120a et 120b mais egalement au niveau de leur partie centrale adoptant ainsi la fonction de bielles qui, soumises a la pression des pieds de l'utilisateur selon un mouvement alternatif transmettent cette pression au moyen des points d'appui de facon a transformer de mouvement As illustrated in the drawings of FIGS. 7a and 7b, the rotation shaft at said original central plate 210 rotating around the axis A3, is provided on either side with said vertical plane with toothed wheels 510a and 510b movement by the movement printed on the plates of which senl 410a 'is illustrated in detail correspond respectively to the first 410a and second 410b cranks arranged on either side of said vertical plane. These toothed wheels or auxiliary plates 510a and 510b are set in motion by means of auxiliary chains Ca and Cb. Thus, these two chains transmit the rotational movement printed on either side of the frame to the first and second cranks by the movement of the levers lOOa and lOOb pivoting at the level of their second extremity 120a and 120b but also at level of their central part thus adopting the function of connecting rods which, subjected to the pressure of the feet of the user according to an alternating movement transmit this pressure by means of the support points so as to transform movement
alternatif en mouvement de rotation au niveau des manivelles. alternating in rotational movement at the cranks.
Selon le mode de realisation non limitatif illustre, la distance entre A1 et A2 et celle entre A2 et A3 respecte un rapport de 1 a 4 pour assurer un effet de levier de rapport 3 permettant 1'economie de force depensee correspondante. De m8me, les plateaux auxiliaires 510a et 510b comptent 2. 5 fois moins de dents que les plateaux dentes 410a' et 410b' correspondent aux premiere et deuxieme manivelles. Cette configuration est comme decrite plus haut particulierement avantageuse en ce qu'elle p errnet de beneficier du systeme de vitesse d ' un pedal ier cl assique sans en avo ir les inc onvenients. En According to the nonlimiting embodiment illustrated, the distance between A1 and A2 and that between A2 and A3 respects a ratio of 1 to 4 to ensure a lever effect of ratio 3 allowing the saving of corresponding spent force. Likewise, the auxiliary plates 510a and 510b have 2.5 times fewer teeth than the toothed plates 410a 'and 410b' correspond to the first and second cranks. This configuration is, as described above, particularly advantageous in that it allows to benefit from the speed system of a pedal pedal without having the drawbacks. In
effet, la cha^'ne d'origine C est independante des deux cha'^nes auxiliaires Ca et Cb. Indeed, the original chain C is independent of the two auxiliary chains Ca and Cb.
On comprend que le dispositif de mise en mouvement d'un vehicule qui vient d'8tre ci-dessus decrit et represente, ne l'a ete qut en vue de la divulgation d' un mode de realisation plutot que d'une limitation. Bien entendu, divers amenagements, modifications et ameliorations pourront 8tre apportes a ltexemple ci-dessus, sans pour autant sortir du cadre de ['invention telle que definie par les It is understood that the device for setting in motion a vehicle which has just been described above and represented, was only for the purpose of disclosing an embodiment rather than a limitation. Of course, various arrangements, modifications and improvements may be made to the example above, without however departing from the scope of the invention as defined by the
reven d i c at i on s.reven d i c at i on s.
Ainsi, bien que ['application a une bicyclette soit particulierement adaptee, le dispositif est egalement susceptible d'etre installe pour tout type de vehicule mu par la force musculaire ou m8me Thus, although the application to a bicycle is particularly suitable, the device is also capable of being installed for any type of vehicle driven by muscular force or even
motorise en jouant sur les distances et sur les differents rapports de couple entrant en jeu. motorized by playing on the distances and on the different torque ratios involved.
Afin de permettre une meilleure comprehension des dessins, une liste des references avec leurs In order to allow a better understanding of the drawings, a list of references with their
legendes est ci-apres enumeree.legends is listed below.
a, 100b leviers a, 110b premiere extremite des leviers 11 la, 11 lb, pedales a, 120b deuxieme extremite des leviers cadre de la bicyclette 210 plateau central 220 pigeons arrieres 310a premiere articulation 31 la fourreau de guidage lineaire 312a arbre de rotation 410a, 410b manivelles 410a', 410b' plateaux 3s 411a roulementabilles 412a graisseur 413a, 413b arbre de rotation 510a, 5 lea roues dentees auxiliaires Al premier axe de rotation A2 deuxieme axe de rotation A3 axe de rotation du plateau central B bicyclette C chaine principale Ca, Cb chaines auxiliaires g a, 100b levers a, 110b first end of the levers 11 la, 11 lb, pedals a, 120b second end of the levers bicycle frame 210 central plate 220 rear pigeons 310a first articulation 31 the linear guide sleeve 312a rotation shaft 410a, 410b cranks 410a ', 410b' chainrings 3s 411a ball bearings 412a grease nipple 413a, 413b rotation shaft 510a, 5 auxiliary drive wheels Al first axis of rotation A2 second axis of rotation A3 axis of rotation of the central chain B bicycle C main chain Ca, Cb auxiliary chains g
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0216683A FR2840874A1 (en) | 2002-06-17 | 2002-12-23 | Power transmission device for bicycle includes two levers with pedals at one end and rotating arms defining on each lever a first and second crank offset by 180 degrees |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0207450A FR2840873A1 (en) | 2002-06-17 | 2002-06-17 | Bicycle transmission device comprises two levers each having freely rotating pedal at on end, support point and rotating shaft defining crank on each lever rotating about same axis |
| FR0216683A FR2840874A1 (en) | 2002-06-17 | 2002-12-23 | Power transmission device for bicycle includes two levers with pedals at one end and rotating arms defining on each lever a first and second crank offset by 180 degrees |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2840874A1 true FR2840874A1 (en) | 2003-12-19 |
Family
ID=29713361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0216683A Pending FR2840874A1 (en) | 2002-06-17 | 2002-12-23 | Power transmission device for bicycle includes two levers with pedals at one end and rotating arms defining on each lever a first and second crank offset by 180 degrees |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2840874A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR881632A (en) * | 1942-04-29 | 1943-04-30 | Propulsion control device for cycles | |
| US4577879A (en) * | 1983-09-19 | 1986-03-25 | Vereyken Franciscus A | Bicycle |
| WO1996026103A1 (en) * | 1995-02-20 | 1996-08-29 | Pastor Alvarez Jose Enrique | Transmission mechanism for bicycles by means of a lever and a rotating plate, adaptable to other types of vehicles |
| EP0963905A2 (en) * | 1998-06-12 | 1999-12-15 | Sony Corporation | Bicycle |
| WO2001030641A1 (en) * | 1999-10-28 | 2001-05-03 | Anton Vladimirovich Rotov | Three-seater bicycle with a high load carrying capacity |
-
2002
- 2002-12-23 FR FR0216683A patent/FR2840874A1/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR881632A (en) * | 1942-04-29 | 1943-04-30 | Propulsion control device for cycles | |
| US4577879A (en) * | 1983-09-19 | 1986-03-25 | Vereyken Franciscus A | Bicycle |
| WO1996026103A1 (en) * | 1995-02-20 | 1996-08-29 | Pastor Alvarez Jose Enrique | Transmission mechanism for bicycles by means of a lever and a rotating plate, adaptable to other types of vehicles |
| EP0963905A2 (en) * | 1998-06-12 | 1999-12-15 | Sony Corporation | Bicycle |
| WO2001030641A1 (en) * | 1999-10-28 | 2001-05-03 | Anton Vladimirovich Rotov | Three-seater bicycle with a high load carrying capacity |
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