FR2704921A1 - Shape for a bicycle crank assembly chain wheel - Google Patents

Shape for a bicycle crank assembly chain wheel Download PDF

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Publication number
FR2704921A1
FR2704921A1 FR9305460A FR9305460A FR2704921A1 FR 2704921 A1 FR2704921 A1 FR 2704921A1 FR 9305460 A FR9305460 A FR 9305460A FR 9305460 A FR9305460 A FR 9305460A FR 2704921 A1 FR2704921 A1 FR 2704921A1
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FR
France
Prior art keywords
shape
crank assembly
bicycle crank
speed
gearing
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
Application number
FR9305460A
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French (fr)
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FR2704921B1 (en
Inventor
Rosset Bernard
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to FR9305460A priority Critical patent/FR2704921B1/en
Publication of FR2704921A1 publication Critical patent/FR2704921A1/en
Application granted granted Critical
Publication of FR2704921B1 publication Critical patent/FR2704921B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
    • B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
    • B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
    • B62M9/08—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving eccentrically- mounted or elliptically-shaped driving or driven wheel; with expansible driving or driven wheel
    • 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
    • B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
    • B62M2009/002—Non-circular chain rings or sprockets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H35/00—Gearings or mechanisms with other special functional features
    • F16H2035/003—Gearings comprising pulleys or toothed members of non-circular shape, e.g. elliptical gears

Abstract

Shape for a bicycle crank assembly chain wheel, transmission pulley or gearing with progressive and degressive radii creating a variable-speed circular motion to cause a constant-speed circular or motion linear. This invention relates to the ogive shape of a bicycle crank assembly, a pulley or gearing, driving a chain, a belt or gearing at constant speed, this shape turning about its axis A produces a motion with constantly progressing and degressing speed. Bicycle crank assembly chain wheels, pulleys and gearing driving piston engines.

Description

La forme idéale d'un plateau de pédalier de vélo,Figure I, ou d'une poulie doit être composée de deux arcs de cercle identiques qui se coupent en formant deux angles suivant les
Figures 3,soit une OGIVE.The ideal shape of a bicycle pedal tray, Figure I, or a pulley must be composed of two identical circular arcs which intersect at two angles according to the
Figures 3, an OGIVE.

Suivant la Figure 2,lorsque l'on fait tourner un cercle autour de son axe A,les rayons AB et AD sont égaux. According to Figure 2, when a circle is rotated about its axis A, the radii AB and AD are equal.

Pour obtenir des rayons différents,il suffit de déplacer l'axe de rotation d'un demi cercle sur un point quelconque entre
B et C ,soit le point F,pour obtenir des rayons différents matérialisés entre FB et FG.To obtain different radii, simply move the axis of rotation of a semicircle on any point between
B and C, point F, to obtain different radii materialized between FB and FG.

J'ai déjà mis en évidence par mon précédent brevet NO 90 I0393 du I6.08.90 concernant le mouvement irrégulier,qutil n'y a aucun à-coup lorsque la longueur du rayon après avoir atteint sa longueur maximum se rétrécie,c'est pourquoi il est tout à fait possible de mettre côte à côte deux arcs de cercle identiques formant deux angles en bout des rayons les plus longs. I have already highlighted by my previous patent No. 90 I0393 of I6.08.90 concerning the irregular movement, that there is no jerk when the length of the radius after reaching its maximum length narrows, that's why it is quite possible to put side by side two identical arcs of circle forming two angles at the end of the longest rays.

Les Figures 3 représentent différentes ogives à titre d'exemples. Figures 3 show different warheads as examples.

J'ai réalisé un plateau de pédalier de vélo,Figure I avec un rayon qui augmente et diminue de 25% par rapport à un plateau rond,qui donne de très bons résultats en vitesse et confort d'utilisation. Les manivelles d'entrainement sont placées perpendiculairement aux rayons les plus longs. I realized a bicycle bottom plate, Figure I with a radius that increases and decreases by 25% compared to a round plate, which gives very good results in speed and comfort of use. The drive cranks are placed perpendicular to the longest radii.

Bien entendu,comme toutes les différences de longueur entre le rayon le plus court et le plus long sont possible, seuls les essais que les utilisateurs feront à l'avenir me permettront de définir les mesures offrant le plus d'intérêt. Of course, as all length differences between the shortest and longest radius are possible, only the tests that users will do in the future will allow me to define the most interesting measures.

Toutes les Ogives présentent les mêmes caractéristiques. All the Ogives have the same characteristics.

Suivant la Figure 4,est représentée une ogive composée de deux arcs BDC et BEC,tournante autour d'un axe A et entrainant autour de sa circonférence une chaine ou une courroie.  According to Figure 4, there is shown an ogive composed of two arcs BDC and BEC, rotating about an axis A and driving around its circumference a chain or a belt.

J'ai divisé en IO le mouvement sur un quart de tour pour l'étudier. I divided the IO movement on a quarter of a turn to study it.

Suivant la figure S,est représenté en linéaire la progression ou diminution de la longueur du rayon entraineur, ceci pour une vitesse régulière de l'ogive autour de l'axe A. According to FIG. 5, the progression or decrease of the length of the coaching radius is represented linearly, for a regular speed of the warhead around the axis A.

La progression ou diminution de la longueur des rayons produit une courbe.The progression or decrease in the length of the rays produces a curve.

Suivant la figure 6,j'ai considéré que la:chaine ou courroie entrainée par l'ogive a une vitesse constante,par conséquent l'ogive a une vitesse irrégulière progressive et dégressive. C'est ce qui m'intéresse pour utiliser au mieux une poussée irrégulière donnée à l'axe A entraineur.Je constate que si le mouvement est irrégulier,la longueur des rayons entraineurs progresse et dégresse de façon régulière. According to Figure 6, I considered that the chain or belt driven by the warhead has a constant speed, therefore the warhead has a gradual and degressive irregular speed. This is what interests me to use at best an irregular thrust given to the axis A trainer.I find that if the movement is irregular, the length of the rays coaches progresses and degresses in a regular way.

Les figures 4',5' et 6' présentent les mêmes caractéristiques que les figures 4,5 et 6 avec des longueurs de rayons différents. Figures 4 ', 5' and 6 'have the same characteristics as Figures 4,5 and 6 with different beam lengths.

Cette forme géométrique peut bien entendu être légèrement modifiée,l'arc de cercle devenir une courbe irrégulière sans pour autant sortir du cadre de protection de cette invention. Tous les plateaux de pédalier, toutes les poulies ainsi que tous les engrenages fabriqués suivant ce principe de mouvement entrent dans le cadre de protection de ce brevet.  This geometric shape can of course be slightly modified, the arc becomes an irregular curve without departing from the scope of this invention. All the bottom plates, all the pulleys as well as all the gears manufactured according to this principle of movement enter within the framework of protection of this patent.

Claims (5)

REVENDICATIONS I > Cette invention concerne la forme d'un plateau de transmission (3) tournant autour d'un axe (A),caractérisée en ce que sa circonférence est formée par deux arcs de cercle identiques qui se coupent en formant deux angles. This invention relates to the shape of a transmission plate (3) rotating around an axis (A), characterized in that its circumference is formed by two identical circular arcs which intersect at two angles. 2) Plateau selon la revendication I,caractérisé en ce que sa vitesse dé rotation est variable progressivement pour un entrainement à vitesse constante à sa circonférence0 2) Tray according to claim I, characterized in that its speed of rotation is gradually variable for a drive at constant speed to its circumference0 3) Plateau selon les revendications I et 2, caractérisé en ce qu'il entraine à sa circonférence une chaine. 3) Tray according to claims I and 2, characterized in that it drives at its circumference a chain. 4) Plateau selon les revendications précédentes, caractérisé en ce qu'ilentraine à sa circonférence une courroie  4) Tray according to the preceding claims, characterized in that it involves at its circumference a belt 5) Plateau selon les revendications précédentes, caractérisé en ce qu?il entraine à sa circonférence un engrenage.  5) Tray according to the preceding claims, characterized in that it drives at its circumference a gear.
FR9305460A 1993-05-06 1993-05-06 Bike bottom plate shape. Expired - Fee Related FR2704921B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9305460A FR2704921B1 (en) 1993-05-06 1993-05-06 Bike bottom plate shape.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9305460A FR2704921B1 (en) 1993-05-06 1993-05-06 Bike bottom plate shape.

Publications (2)

Publication Number Publication Date
FR2704921A1 true FR2704921A1 (en) 1994-11-10
FR2704921B1 FR2704921B1 (en) 1998-06-12

Family

ID=9446859

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9305460A Expired - Fee Related FR2704921B1 (en) 1993-05-06 1993-05-06 Bike bottom plate shape.

Country Status (1)

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FR (1) FR2704921B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001064505A1 (en) * 2000-03-03 2001-09-07 Daniel Gongora Sanchez Bicycle transmission
FR2959982A1 (en) * 2010-05-11 2011-11-18 Bernard Rosset Bicycle chain driving plate, has two circular arcs rotating around axis of common cords to regularly vary speed of rotation of crank on which common cords are fixed by driving chains at constant speed

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR350848A (en) * 1905-01-18 1905-06-27 Fernand Francois Camille Lemai Force producer for a bicycle by multiplication of oval eccentric gears
FR911327A (en) * 1942-06-05 1946-07-04 Improvements in the operation of bicycles, tandems, tricycles, scooters, and all other pedal vehicles
FR925398A (en) * 1946-03-26 1947-09-02 Control plate for gear driven by pedals or cranks and with variable development
FR2264709A1 (en) * 1974-03-22 1975-10-17 Bonneau Gabriel Oval crank wheel for bicycle - has elliptical or similar shape for minimum loss of energy
US4342559A (en) * 1978-01-18 1982-08-03 National Technology Corporation Drive system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR350848A (en) * 1905-01-18 1905-06-27 Fernand Francois Camille Lemai Force producer for a bicycle by multiplication of oval eccentric gears
FR911327A (en) * 1942-06-05 1946-07-04 Improvements in the operation of bicycles, tandems, tricycles, scooters, and all other pedal vehicles
FR925398A (en) * 1946-03-26 1947-09-02 Control plate for gear driven by pedals or cranks and with variable development
FR2264709A1 (en) * 1974-03-22 1975-10-17 Bonneau Gabriel Oval crank wheel for bicycle - has elliptical or similar shape for minimum loss of energy
US4342559A (en) * 1978-01-18 1982-08-03 National Technology Corporation Drive system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001064505A1 (en) * 2000-03-03 2001-09-07 Daniel Gongora Sanchez Bicycle transmission
ES2189583A1 (en) * 2000-03-03 2003-07-01 Sanchez Daniel Congora Bicycle transmission
FR2959982A1 (en) * 2010-05-11 2011-11-18 Bernard Rosset Bicycle chain driving plate, has two circular arcs rotating around axis of common cords to regularly vary speed of rotation of crank on which common cords are fixed by driving chains at constant speed
FR2959983A1 (en) * 2010-05-11 2011-11-18 Bernard Rosset TRAY FOR A BIKE PEDAL

Also Published As

Publication number Publication date
FR2704921B1 (en) 1998-06-12

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