FR2717440A1 - Extendable pedal crank for bicycles - Google Patents

Extendable pedal crank for bicycles Download PDF

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Publication number
FR2717440A1
FR2717440A1 FR9403390A FR9403390A FR2717440A1 FR 2717440 A1 FR2717440 A1 FR 2717440A1 FR 9403390 A FR9403390 A FR 9403390A FR 9403390 A FR9403390 A FR 9403390A FR 2717440 A1 FR2717440 A1 FR 2717440A1
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FR
France
Prior art keywords
arm
eccentric
pedal
roller
movable arm
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Withdrawn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
FR9403390A
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French (fr)
Inventor
Rousseau Rene
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
Priority to FR9403390A priority Critical patent/FR2717440A1/en
Publication of FR2717440A1 publication Critical patent/FR2717440A1/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Withdrawn legal-status Critical Current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
    • B62M3/06—Construction of cranks operated by hand or foot with elliptical or other non-circular rotary movement
    • 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
    • B62M3/02—Construction of cranks operated by hand or foot of adjustable length
    • B62M3/04—Construction of cranks operated by hand or foot of adjustable length automatically adjusting

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

A movable arm (1) supports the pedal on its external side and on the axle side , a transverse groove acting as a roller cage. The arm slides on another arm (2) fixed to the pedal axle which supports an eccentric (4) having a roller (3) which slides in the movable arm cage. A small gear (5) meshes with another larger gear (6), giving a two to one ratio, fixed to the pedal casing. At the time of turning the pedal , the small gear gravitates around the large gear and rotates the eccentric. The eccentric then, through its roller, activates the movable arm and elongates it to the front. It returns the arm to its first length in the low position, lengthening it in the rear position and bringing it back to its initial length in the top position following each pedal tun.

Description

La présente invention concerne un dispositif pour allonger les manivelles des pédaliers en positions avant et arrière et les remettre à leurs longueurs initiales en positions basse et haute lors d'un tour de pédales, pour en augmenter le couple. The present invention relates to a device for lengthening the cranks of the pedals in front and rear positions and returning them to their initial lengths in low and high positions during a pedal turn, to increase the torque.

Les manivelles des pédaliers sont traditionnellement de longueurs fixes, conçues suivant l'utilisateur et l'utilisation du véhicule pour ne pas toucher le sol, surtout dans les virages inclinés. The cranks of the pedals are traditionally of fixed lengths, designed according to the user and the use of the vehicle so as not to touch the ground, especially in inclined turns.

Le dispositif suivant l'invention permet de remédier à cet inconvénient, il comporte en effet une portion de bras mobile 1 supportant, caté extérieur la pédale et coté axe une rainure transversale servant de cage au galet 3 , elle coulisse sur une autre portion de bras 2 fixée sur l'axe du pédalier, sur ce bras est positionné un excentrique 4 muni de son galet 3 qui glisse dans la cage du bras mobile; faisant corps avec l'excentrique, un engrenage 5 est en contact avec un autre 6, de rapport 2/1, solidaire de la cage du pédalier. The device according to the invention makes it possible to remedy this drawback, it in fact comprises a portion of movable arm 1 supporting, outside the pedal and on the axis side a transverse groove serving as a cage for the roller 3, it slides on another portion of arm 2 fixed on the axle of the crankset, on this arm is positioned an eccentric 4 provided with its roller 3 which slides in the cage of the movable arm; forming a body with the eccentric, a gear 5 is in contact with another 6, of ratio 2/1, secured to the bottom bracket.

Pendant un tour de pédale, le petit engrenage 5 tourne autour du grand 6 et se met en rotation en entrainant l'excentrique 4 qui, par l'intermédiaire de son galet 3 glissant dans sa cage, actionne le bras mobile 1 et le fait coulisser sur le bras central 2; il s'allonge en position avant, revient à sa première longueur en position basse, se rallonge en position arrière et reprend sa lon- gueux primitive en position haute et ainsi de suite à chaque tour de pédale.During a pedal turn, the small gear 5 rotates around the large 6 and starts to rotate, driving the eccentric 4 which, by means of its roller 3 sliding in its cage, actuates the movable arm 1 and makes it slide on the central arm 2; it lengthens in the front position, returns to its first length in the low position, lengthens in the rear position and resumes its original length in the high position and so on each pedal turn.

La distance de l'axe de l'excentrique à l'axe du pédalier est égale à l'entre axe du jeu d'engrenages choisi. L'allongement de la manivelle est fonction de la position du galet 3 sur l'excentrique 4 et sa valeur est égale au double de
la distance de l'axe de l'excentrique à celui du galet, cet allongement est étudié en fonction de l'utilisateur et de l'utilisation du véhicule.The distance from the axis of the eccentric to the axis of the crankset is equal to the inter-axis of the chosen set of gears. The elongation of the crank is a function of the position of the roller 3 on the eccentric 4 and its value is equal to twice
the distance from the axis of the eccentric to that of the roller, this extension is studied according to the user and the use of the vehicle.

La figure 1 représente le dispositif suivant l'invention, la manivelle dans sa longueur primitive, en position haute, elle est la mame en position basse. FIG. 1 represents the device according to the invention, the crank in its original length, in the high position, it is the same in the low position.

La figure 2 représente la manivelle allongée en position avant, elle est la meme en position arrière. Figure 2 shows the elongated crank in the front position, it is the same in the rear position.

La figure 3 représente la rotation elliptique des pédales, elle peut-etre, suivant la position du galet par rapport à l'engrenage fixe du pédalier, à axe incliné sur l'arrière ou à axe horizontal ou incliné sur l'avant. Figure 3 shows the elliptical rotation of the pedals, it may be, depending on the position of the roller relative to the fixed gear of the crankset, inclined axis on the rear or horizontal axis or inclined on the front.

Les dessins représentent un dispositif selon l'invention dans sa forme élé- mentaire, en y interposant billes, aiguilles, rouleaux, galets, roulements, etc on en améliore le fonctionnement. The drawings show a device according to the invention in its elementary form, by interposing balls, needles, rollers, rollers, bearings, etc., its operation is improved.

L'excentrique est actionné par des engrenages à contact, il peut l'être par par un ensemble de transmission à chaine ou à courroie crantée.  The eccentric is activated by contact gears, it can be activated by a chain or toothed belt transmission assembly.

Le bras mobile coulisse sur le bras fixe, mais il peut coulisser à l'inté- rieur et prendre toutes autres formes transversales que celle représentée sur les dessins. The movable arm slides on the fixed arm, but it can slide inside and take any other transverse shape than that shown in the drawings.

Les dessins représentent une seule manivelle, l'autre est identique, sans plateau et montée de l'autre caté de la cage du pédalier, en opposition. The drawings represent a single crank, the other is identical, without chainring and mounted on the other side of the bottom bracket, in opposition.

Le dispositif suivant l'invention est destiné à augmenter la puissance des pédaliers.  The device according to the invention is intended to increase the power of the pedals.

Claims (3)

REVENDICATIONS 1) Dispositif pour allonger les manivelles des pédaliers en positions avant et arrière et les ramener à leurs longueurs primitives en positions basse et haute pendant un tour de pédales, pour en augmenter le couple, caractérisé en ce qu'il comporte un bras mobile 1 supportant caté extérieur la pédale et c8té axe une cage transversale pour le galet 3 , ce bras coulisse sur le bras axial 2 fixé sur l'axe du pédalier. 1) Device for lengthening the cranks of the pedals in front and rear positions and bringing them back to their original lengths in low and high positions during a turn of the pedals, to increase the torque, characterized in that it comprises a movable arm 1 supporting outside the pedal and c8té axis a transverse cage for the roller 3, this arm slides on the axial arm 2 fixed on the axle of the crankset. 2) Dispositif suivant la revendication 1 caractérisé par un excentrique 4 positionné sur le bras central, il est muni d'un galet 3 qui se déplace dans la cage du bras mobile 1 pendant la rotation de l'excentrique et il allonge ou raccourci le bras mobile. 2) Device according to claim 1 characterized by an eccentric 4 positioned on the central arm, it is provided with a roller 3 which moves in the cage of the movable arm 1 during the rotation of the eccentric and it lengthens or shortens the arm mobile. 3) Dispositif suivant les revendications 1 et 2 caractérisé par un jeu d'engrenages de rapport 2/1 dont le petit 5 est fixé sur l'excentrique et le grand 6 est solidaire de la cage du pédalier, lors du déplacement de la pédale, l'en- grenage 5 se met en rotation en gravitant autour du 6 et entraîne l'excentrique.  3) Device according to claims 1 and 2 characterized by a set of gears with a ratio of 2/1, the small 5 of which is fixed on the eccentric and the large 6 is integral with the crankset of the crankset, when the pedal is moved, the gear 5 is rotated by gravitating around the 6 and drives the eccentric.
FR9403390A 1994-03-21 1994-03-21 Extendable pedal crank for bicycles Withdrawn FR2717440A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9403390A FR2717440A1 (en) 1994-03-21 1994-03-21 Extendable pedal crank for bicycles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9403390A FR2717440A1 (en) 1994-03-21 1994-03-21 Extendable pedal crank for bicycles

Publications (1)

Publication Number Publication Date
FR2717440A1 true FR2717440A1 (en) 1995-09-22

Family

ID=9461334

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9403390A Withdrawn FR2717440A1 (en) 1994-03-21 1994-03-21 Extendable pedal crank for bicycles

Country Status (1)

Country Link
FR (1) FR2717440A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000030924A1 (en) * 1998-11-21 2000-06-02 Kang Byung Nam Adjustable pedal driving device of bicycle
ES2268911A1 (en) * 2003-02-18 2007-03-16 Beñat Aiastui Irizar Power transmission system for use in bicycles, has connecting rods with variable length for moving pedals in elliptical trajectory, and power transmission support and auxiliary mechanism used for varying length of connecting rods
ES2268923A1 (en) * 2004-02-20 2007-03-16 Beñat Aiasturi Irizar Mechanical connection device used in converting circular motion into elliptical movement for bicycle, has diverse pushing and rotating components for rotating circular and elliptical pedals, and connecting rod for applying force to pedals

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR960809A (en) * 1950-04-26
FR2356550A1 (en) * 1976-06-28 1978-01-27 Berclaz Rene Louis VARIABLE GEOMETRY CYCLE CRANKSET
DE9011789U1 (en) * 1990-08-14 1990-10-25 Wu, Ching-Rong, Tainan Bicycle chain drive

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR960809A (en) * 1950-04-26
FR2356550A1 (en) * 1976-06-28 1978-01-27 Berclaz Rene Louis VARIABLE GEOMETRY CYCLE CRANKSET
DE9011789U1 (en) * 1990-08-14 1990-10-25 Wu, Ching-Rong, Tainan Bicycle chain drive

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000030924A1 (en) * 1998-11-21 2000-06-02 Kang Byung Nam Adjustable pedal driving device of bicycle
ES2268911A1 (en) * 2003-02-18 2007-03-16 Beñat Aiastui Irizar Power transmission system for use in bicycles, has connecting rods with variable length for moving pedals in elliptical trajectory, and power transmission support and auxiliary mechanism used for varying length of connecting rods
ES2268923A1 (en) * 2004-02-20 2007-03-16 Beñat Aiasturi Irizar Mechanical connection device used in converting circular motion into elliptical movement for bicycle, has diverse pushing and rotating components for rotating circular and elliptical pedals, and connecting rod for applying force to pedals

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