FR2793761A1 - Crank gear for bicycle has bearings with diameter equal to diameter of driving plate - Google Patents

Crank gear for bicycle has bearings with diameter equal to diameter of driving plate Download PDF

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Publication number
FR2793761A1
FR2793761A1 FR9906551A FR9906551A FR2793761A1 FR 2793761 A1 FR2793761 A1 FR 2793761A1 FR 9906551 A FR9906551 A FR 9906551A FR 9906551 A FR9906551 A FR 9906551A FR 2793761 A1 FR2793761 A1 FR 2793761A1
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France
Prior art keywords
pedal
diameter
bicycle
pedals
bearings
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Granted
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FR9906551A
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French (fr)
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FR2793761B1 (en
Inventor
Paul Guilbard
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Individual
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Individual
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Priority to FR9906551A priority Critical patent/FR2793761B1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62MRIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M1/00Rider propulsion of wheeled vehicles
    • B62M1/36Rider propulsion of wheeled vehicles with rotary cranks, e.g. with pedal cranks
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62MRIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M3/00Construction of cranks operated by hand or foot
    • B62M3/003Combination of crank axles and bearings housed in the bottom bracket
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62MRIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M3/00Construction of cranks operated by hand or foot
    • B62M2003/006Crank arrangements to overcome dead points

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Gear-Shifting Mechanisms (AREA)

Abstract

Frame (42) of bicycle supports plate (46) and pedals (52). Crank gear has bearings (44) with diameter equal to diameter of driving plate. Bearings are attached to frame, and are placed between frame and mobile central sub-unit (48) that comprises pedals, attached to crank (50).

Description

La présente invention concerne un dispositif mécanique<B>à</B> pédales, conçu pour entraîner une machine du genre<B>:</B> pédalier de vélo ou similaire. The present invention relates to a mechanical device <B> to </ B> pedals, designed to drive a machine of the kind <B>: </ B> bicycle pedal or the like.

Ce dispositif tend<B>à</B> modifier l'approche des différents composants qui caractérisent la force déployée, de manière<B>à</B> diminuer l'effort exercé sur la pédale. This device tends to modify the approach of the various components that characterize the force deployed, so as to reduce the force exerted on the pedal.

Dans l'utilisation courante du genre, le pédalier comporte trois composants déterminants. lis peuvent être classés de la façon suivante <B>1)</B> la pédale qui représente l'élément motorisant principal<B>;</B> 2) la révolution de l'effort qui est caractérisée par un système de roulement au centre du pédalier<B>;</B> <B>3)</B> un plateau d'entraînement qui sert<B>à</B> transmettre la force déployée par l'ensemble du mécanisme. In the current use of the genre, the pedal has three critical components. they can be classified as follows <B> 1) </ B> the pedal which represents the main motorizing element <B>; </ B> 2) the revolution of the effort which is characterized by a rolling system in the center of the bottom bracket <B>; </ B> <B> 3) </ B> a drive plate that serves to transmit the force deployed by the entire mechanism.

Jusqu'à présent, les pédales sont reliées aux deux manivelles, qui sont elles-mêmes fixées<B>à</B> un arbre central équipé de roulements, pour faire tourner l'ensemble arbre et plateau. Until now, the pedals are connected to the two cranks, which are themselves fixed to a central shaft equipped with bearings, to rotate the shaft and plate assembly.

Cet ensemble est lui-même composé d'un ou de plusieurs plateaux d'entraînement pour chaîne ou d'un équipement similaire assurant la traction. En alignant<B>à</B> la verticale -les deux manivelles du pédalier par rapport<B>à</B> l'axe central, une pédale se trouve<B>à</B> son point "Haut" maximum et l'autre<B>à</B> son point "Bas". Une sorte de "temps mort" est observée en rotation, paralysant<B>à</B> cet endroit précis une partie de l'effort exercé sur la pédale. This assembly is itself composed of one or more drive plates for chain or similar equipment providing traction. By aligning <B> to </ B> the vertical - both pedal cranks in relation to the center axis <B>, a pedal is located <B> at </ B> its "High" point maximum and the other <B> at </ B> its "Low" point. A kind of "dead time" is observed in rotation, paralyzing <B> to </ B> this precise place a part of the force exerted on the pedal.

En effet, quand la pédale est au point (haut maximum), plus l'effort est important, plus il est difficile d'assurer la rotation de l'ensemble, puisque dans la circonférence parcourue par la pédale, la meilleure production de l'effort règne autour d'un angle de 45 degrés. Le "temps mort" observé en cours de rotation n'est pas tout<B>à</B> fait conforme<B>à</B> l'effort souhaitable continu sur la pédale. Indeed, when the pedal is at the point (maximum high), the greater the effort is important, the more difficult it is to ensure the rotation of the assembly, since in the circumference traversed by the pedal, the best production of the effort reigns around a 45 degree angle. The "dead time" observed during rotation is not all <B> to </ B> made consistent <B> to </ B> the continuous desirable effort on the pedal.

Cette difficulté passagère démontre qu'il reste quelque chose<B>à</B> faire pour éviter cette paralysie systématique (haute ou basse), causée par la position de l'arbre central, il n'a d'autre pouvoir que d'entraver la rotation régulière de la pédale. This transient difficulty demonstrates that there is something left to do to avoid this systematic paralysis (high or low), caused by the position of the central tree, it has no other power than hinder the regular rotation of the pedal.

Le dispositif selon l'invention permet de remédier<B>à</B> cet inconvénient. The device according to the invention can remedy <B> to </ B> this disadvantage.

En comparaison de la circonférence employée actuellement, la pédale étant toujours considérée comme la motorisation principale, se trouve directement fixée sur l'ensemble du pédalier, par l'intermédiaire de la tige de pédale. In comparison with the circumference currently used, the pedal is still considered the main engine, is directly attached to the entire pedal, through the pedal rod.

Le roulement est<B>à</B> présent positionné sur la circonférence extérieure du pédalier qui regroupe d'un seul tenant tous les principaux éléments. The bearing is <B> to </ B> present positioned on the outer circumference of the crankset which gathers in one piece all the main elements.

Le diamètre du plateau d'entraînement de la chaîne se rapproche le plus possible de celui du roulement extérieur du pédalier. The diameter of the drive plate of the chain is as close as possible to that of the outer bearing of the crankset.

<B>Il</B> en est de même dans le choix de la longueur des manivelles qui sépare la pédale du pédalier. <B> It </ B> is the same in the choice of the length of the cranks that separates the pedal from the pedal.

Cependant, suivant la recherche, les manivelles de pédales peuvent être supprimées complètement pour laisser place<B>à</B> la fixation directe des pédales<B>à</B> la périphérie. However, according to the research, the pedal cranks can be removed completely to make room <B> for </ B> the direct attachment of pedals <B> to </ B> the periphery.

Tout repose dans la manière de créer la révolution de l'effort sur la machine, par rapport<B>à</B> la disposition réalisable de la partie mobile. Everything rests in the way of creating the revolution of the effort on the machine, in relation to the feasible arrangement of the moving part.

La description du pédalier est la suivante<B>:</B> l'ensemble principal (repère 48) est composé d'éléments différents, représentés par la pédale<B>(52),</B> attachée<B>à</B> la manivelle<B>(50).</B> Ces deux dernières sont montées en équilibre, en opposition diamétrale. La couronne dentée (46) s'y trouve également fixée. The description of the pedal is as follows: <B>: </ B> the main set (mark 48) is composed of different elements, represented by the pedal <B> (52), </ B> attached <B> to </ B> the crank <B> (50). </ B> These last two are mounted in equilibrium, in diametrical opposition. The ring gear (46) is also attached thereto.

Un roulement (44) repose d'autre part<B>:</B> sur la circonférence extérieure du pédalier (48) et d'autre part<B>:</B> sur le cadre (42) de la machine. Cet agencement permet de rendre mobile l'ensemble du pédalier. A bearing (44) rests on the other hand <B>: </ B> on the outer circumference of the pedal (48) and on the other hand <B>: </ B> on the frame (42) of the machine. This arrangement makes it possible to make the whole crankset mobile.

Le système monté est prêt<B>à</B> fonctionner. En parcourant la même circonférence que dans l'utilisation actuelle, l'effort assuré par la pédale<B>(52)</B> sur le roulement (44) extériorisé, fait coïncider plus favorablement sa révolution sur la couronne dentée (46), pratiquement de même diamètre. The mounted system is ready to work. By traversing the same circumference as in the current use, the force provided by the pedal <B> (52) </ B> on the bearing (44) exteriorized, coincides more favorably its revolution on the ring gear (46) , practically the same diameter.

Les trois éléments déterminants (52-46-44) étant regroupés le plus près possible les uns des autres, ne nécessitent plus un effort aussi grand par rapport<B>à</B> la circonférence initiale du départ. The three determining elements (52-46-44) being grouped as close as possible to each other, no longer require a force as large compared to <B> at the initial circumference of the departure.

De plus, lorsqu'une pédale est en haut et l'autre en bas, le temps mort disparaît en fonction du diamètre du roulement utilisé, sa position extériorisée contribue<B>à</B> la diminution de l'effort observé, par rapport au rapprochement maximum de la position de la pédale. Moreover, when one pedal is at the top and the other at the bottom, the dead time disappears as a function of the diameter of the bearing used, its externalized position contributes <B> to </ B> the decrease of the effort observed, by relative to the maximum approximation of the position of the pedal.

Le dispositif selon l'invention est particulièrement destiné<B>à</B> entraîner toutes sortes de machines<B>à</B> pédales pour toutes fonctions.The device according to the invention is particularly intended <B> to </ B> to drive all kinds of machines <B> to </ B> pedals for all functions.

Claims (1)

R<B>E</B> V<B>E N D 1 C A</B> T<B>1 0 N S</B> <B>1.</B> Dispositif mécanique d'entraînement<B>à</B> chaîne pour un vélo avec un cadre (42) supportant un pédalier muni d'au moins un plateau (46) et de pédales<B>(52),</B> caractérisé en ce que ce pédalier comprend un roulement (44) de diamètre sensiblement égal<B>à</B> celui du plateau d'entraînement, ledit roulement (44) étant interposé entre le cadre (42) du vélo dont il est solidaire d'une part et un élément (48) central mobile qui reçoit le au moins un plateau (46) d'autre part, les pédales<B>(52)</B> étant fixées de façon diamétralement opposée sur cet élément (48) central. 2. Dispositif mécanique selon la revendication<B>1,</B> caractérisé en ce que les pédales<B>(52)</B> sont reliées<B>à</B> l'élément central du pédalier par des manivelles <B>(50).</B> <B>3.</B> Dispositif mécanique selon la revendication<B>1,</B> caractérisé en ce que les pédales<B>(52)</B> sont montées<B>à</B> rotation directement sur l'élément (48) central du pédalier.R <B> E </ B> V <B> END 1 CA </ B> 1 <NS </ B> <B> 1. </ B> Mechanical drive <B> to < / B> chain for a bicycle with a frame (42) supporting a pedal with at least one plate (46) and pedals <B> (52), </ B> characterized in that this pedal comprises a bearing ( 44) of substantially equal diameter <B> to </ B> that of the drive plate, said bearing (44) being interposed between the frame (42) of the bicycle which it is secured to a hand and a member (48). movable central receiving the at least one plate (46) on the other hand, the pedals <B> (52) </ B> being fixed diametrically opposite on this element (48) central. 2. Mechanical device according to claim 1, characterized in that the pedals <B> (52) </ B> are connected <B> to </ B> the central element of the pedal by means of cranks <B> (50). </ B> <B> 3. </ B> Mechanical device according to claim 1, characterized in that the <B> pedals (52) </ B> > are mounted <B> to </ B> rotation directly on the element (48) central pedal.
FR9906551A 1999-05-19 1999-05-19 BICYCLE CRANKSET Expired - Fee Related FR2793761B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9906551A FR2793761B1 (en) 1999-05-19 1999-05-19 BICYCLE CRANKSET

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9906551A FR2793761B1 (en) 1999-05-19 1999-05-19 BICYCLE CRANKSET

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FR2793761A1 true FR2793761A1 (en) 2000-11-24
FR2793761B1 FR2793761B1 (en) 2001-06-22

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FR9906551A Expired - Fee Related FR2793761B1 (en) 1999-05-19 1999-05-19 BICYCLE CRANKSET

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006264655A (en) * 2005-03-24 2006-10-05 Kunio Nitta Pedal rotation force increasing and bodily burden reducing device for bicycle
FR2933952A1 (en) * 2008-07-16 2010-01-22 Francis Guet Bicycle, has crankset system with external spoke flanges serving as support for supporting plates and pedals, where crankset system is not provided with central hub, and fixation points of pedals are decentered

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE452839C (en) * 1927-11-21 Max Spengler Pedal crank for bicycles
DE19744118A1 (en) * 1997-10-06 1999-04-08 Matthias Frerck Pedal crank unit for cycles

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE452839C (en) * 1927-11-21 Max Spengler Pedal crank for bicycles
DE19744118A1 (en) * 1997-10-06 1999-04-08 Matthias Frerck Pedal crank unit for cycles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006264655A (en) * 2005-03-24 2006-10-05 Kunio Nitta Pedal rotation force increasing and bodily burden reducing device for bicycle
FR2933952A1 (en) * 2008-07-16 2010-01-22 Francis Guet Bicycle, has crankset system with external spoke flanges serving as support for supporting plates and pedals, where crankset system is not provided with central hub, and fixation points of pedals are decentered

Also Published As

Publication number Publication date
FR2793761B1 (en) 2001-06-22

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Effective date: 20110131