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 PDFInfo
- 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
- Authority
- FR
- France
- Prior art keywords
- pedal
- diameter
- bicycle
- pedals
- bearings
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M1/00—Rider propulsion of wheeled vehicles
- B62M1/36—Rider propulsion of wheeled vehicles with rotary cranks, e.g. with pedal cranks
-
- 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
-
- 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
- B62M2003/006—Crank arrangements to overcome dead points
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
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)
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 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2793761A1 true FR2793761A1 (en) | 2000-11-24 |
FR2793761B1 FR2793761B1 (en) | 2001-06-22 |
Family
ID=9545935
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9906551A Expired - Fee Related FR2793761B1 (en) | 1999-05-19 | 1999-05-19 | BICYCLE CRANKSET |
Country Status (1)
Country | Link |
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FR (1) | FR2793761B1 (en) |
Cited By (2)
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)
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 |
-
1999
- 1999-05-19 FR FR9906551A patent/FR2793761B1/en not_active Expired - Fee Related
Patent Citations (2)
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)
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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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |
Effective date: 20110131 |