FR2564796A1 - Pedal box with cranks of variable geometry. - Google Patents

Pedal box with cranks of variable geometry. Download PDF

Info

Publication number
FR2564796A1
FR2564796A1 FR8408012A FR8408012A FR2564796A1 FR 2564796 A1 FR2564796 A1 FR 2564796A1 FR 8408012 A FR8408012 A FR 8408012A FR 8408012 A FR8408012 A FR 8408012A FR 2564796 A1 FR2564796 A1 FR 2564796A1
Authority
FR
France
Prior art keywords
pinion
fixed
extension
pedal
crankset
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.)
Pending
Application number
FR8408012A
Other languages
French (fr)
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.)
BOURGOUIN BERNARD
Original Assignee
BOURGOUIN BERNARD
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 BOURGOUIN BERNARD filed Critical BOURGOUIN BERNARD
Priority to FR8408012A priority Critical patent/FR2564796A1/en
Publication of FR2564796A1 publication Critical patent/FR2564796A1/en
Pending legal-status Critical Current

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
    • B62M3/02—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
    • 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)
  • Transmission Devices (AREA)

Abstract

The invention relates to a mechanical device, which makes it possible to increase the length of the lever arms formed by the cranks of a pedal box. This extension takes place in an automatic fashion during the active phase of pedalling. In contrast, this same device has the effect of reducing the length of the lever during the inactive phase of pedalling (raising the pedal back up). According to the invention, the extension of the cranks has no influence on the amplitude of the movement, which remains circular, or on its regularity. This invention relates to all machines moved by man's muscle power (arms or legs). It can be directly applied to bicycles, to bikes for pedalling in the vertical or horizontal position, to tandems, to vehicles for the disabled, to pedal cars, pedalos, microlight flying machines and to all machines or mechanisms equipped with pedal boxes, where it is desired to maximise the value of the pedalling torque, without increasing the amplitude of the movement, and in consequence, to improve the efficiency of pedalling.

Description

DESCRIPTI0E
Selon l'invention, chaque manivelle du pédalier est réalisée en deux parties qui sont - Le bras principal (2) à déplacement radial par rapport à l'axe du pédalier
(8).DESCRIPTI0E
According to the invention, each crank of the crankset is made in two parts which are - The main arm (2) with radial displacement relative to the axis of the crankset
(8).

- Le prolongateur (3), dont la longueur est à définir en fonction de la
valeur de l'allongement souhaité.- The extension (3), the length of which is to be defined according to the
desired elongation value.

L'allongemellt obtenu est égal à la longueur du prolongateur (cette même longueur se retranche de la longueur du bras principal, au cours de la phase inactive du pédalage et devient raccourcissement). The elongation obtained is equal to the length of the extension (this same length is subtracted from the length of the main arm, during the inactive phase of pedaling and becomes shortening).

Le prolongateur (3) est toujours maintenu en position horizontale. Ce maintien de la position est obtenu grâce à une liaison mécanique (9) réalisée entre un pignon fixe (5) positionné dans l'axe du pédalier (8) et un autre pignon satellite (6) du premier, qui est solidaire de l'axe du prolongateur (7) et fixe par rapport à ce dernier. Le pignon satellite (6) tourne autour du pignon fixe (5) tout en tournant sur lui-même. The extension (3) is always kept in a horizontal position. This maintenance of the position is obtained thanks to a mechanical connection (9) produced between a fixed pinion (5) positioned in the axis of the crankset (8) and another satellite pinion (6) of the first, which is integral with the axis of the extension (7) and fixed relative to the latter. The satellite pinion (6) rotates around the fixed pinion (5) while rotating on itself.

La liaison mécanique (9) peut etre réalisée suivant plusieurs variantes qui sont la chaîne, la courroie crantée, le train de pignon ou bien, l'arbre renvoi d'ange à pignons coniques ou la combinaison de ces moyens et tout autre dispositif mécanique d'entrainement entre pignons. The mechanical connection (9) can be carried out according to several variants which are the chain, the toothed belt, the pinion train or else, the angel return shaft with bevel gears or the combination of these means and any other mechanical device d between sprockets.

Le rapport de la transmission est 1/1. The transmission ratio is 1/1.

Le pignon fixe (5) est bloqué en rotation par un bras anti-rotation (10). Ce bras anti-rotation est intercalé entre le plateau d'entralnement (12) et le bras principal de 1ensemble manivelle (2). Le bras anti-rotation est solidaire du cadre de la machine (13) par l'une de ses extrémités. The fixed pinion (5) is locked in rotation by an anti-rotation arm (10). This anti-rotation arm is interposed between the entrainment plate (12) and the main arm of the crank assembly (2). The anti-rotation arm is secured to the frame of the machine (13) by one of its ends.

L'autre extrémité immobilise en rotation le pignon fixe (5), supporté par l'axe du pédalier au moyen d'un roulement (11).The other end immobilizes in rotation the fixed pinion (5), supported by the crank axle by means of a bearing (11).

Le plateau de transmission (12) est entralné par l'axe du pédalier (8) au moyen d'un emmanchement carré.  The transmission plate (12) is entralée by the axis of the crankset (8) by means of a square fitting.

L'axe du pédalier (8) est entraîné par le bras principal (2) également par le moyen de ltemmanchement carré. Le prolongateur (3) quant a lui, est aussi rendu solidaire de l'axe porteur du pignon satellite (6) par le moyen de l'emmanchement carré. The axle of the crankset (8) is driven by the main arm (2) also by means of the square fitting. The extension (3) meanwhile, is also made integral with the carrier axis of the satellite pinion (6) by means of the square fitting.

La pédale (4) est fixée à l'extrémité du prolongateur (3), sans nécessité de rotation complète autour de son axe. Elle est toutefois maintenue avec une légère tolérance angulaire, de façon à osciller.pour accepter les écarts de position du pied. The pedal (4) is fixed to the end of the extension (3), without the need for complete rotation around its axis. It is however maintained with a slight angular tolerance, so as to oscillate. To accept deviations in the position of the foot.

Cette description vaut pour l'ensemble manivelles côté plateau de transmission (12). Elle est identique pour l'ensemble manivelles côté opposé sauf en ce qui concerne le bras anti-rotation qui peut être supprimé, moyennant de fixer le pignon fixe (5) directement sur la boite du pédalier (1). This description applies to the crankset assembly on the transmission plate side (12). It is identical for the set of cranks on the opposite side except as regards the anti-rotation arm which can be eliminated, by means of fixing the fixed pinion (5) directly on the bottom bracket (1).

Réglages : Le prolongateur est calé par rapport au bras principal, de façon à être perpendiculaire au sens d'application de la force. Pour ce faire les pignons fixes sont immobilisés définitivement apres leur réglage obtenu par rotation de ceux-ci. Adjustments: The extension is fixed relative to the main arm, so as to be perpendicular to the direction of application of the force. To do this, the fixed gears are permanently immobilized after their adjustment obtained by rotation of these.

La tension des chaînes ou courroies crantées est obtenue par déplacement longitudinal de l'axe du pignon satellite (cas des liaisons mécaniques par chaîne ou par courroies crantées).  The tension of the chains or toothed belts is obtained by longitudinal displacement of the axis of the satellite pinion (in the case of mechanical links by chain or by toothed belts).

FONCTIONNEMENT
Cycle du pédalage
Position initiale
Bras principal (2) et prolongateur (3) alignés perpendiculairement au sens d'application de la force Z de pedalage (longueur maximale du bras de levier).OPERATION
Pedaling cycle
Initial position
Main arm (2) and extension (3) aligned perpendicular to the direction of application of the pedaling force Z (maximum length of the lever arm).

Sous l'action de F le bras principal (2) entraîné en rotation décrit un cercle A centré sur l'axe du pédalier (8), cependant que l'extrémité B du prolongateur décrit un cercle B centré sur un axe pédalier virtuel (axe de pédalage), décalé de la longueur du prolongateur par rapport au centre du cercle A. Under the action of F the main arm (2) driven in rotation describes a circle A centered on the crankset axis (8), while the end B of the extension describes a circle B centered on a virtual crankset axis (axis pedaling), offset by the length of the extension from the center of circle A.


En position initiale, la longueur de l'ensemble manivelle, est maximale
o par rapport au centre du cercle A.
In the initial position, the length of the crank assembly is maximum
o relative to the center of circle A.

Cette longueur décroit progressivement entre la position initiale et le point mort bas, où la longueur devient égale à la longueur du bras principal
Au cours de la remontée de la pédale, (la phase inactive du pédalage) la longueur de l'ensemble manivelles varie pour atteindre une valeur minimale, au point opposé à celui de la position initiale. Cette valeur est égale à la différence des longueurs bras principal-prolongateur.This length gradually decreases between the initial position and the bottom dead center, where the length becomes equal to the length of the main arm
During the ascent of the pedal, (the inactive phase of pedaling) the length of the crank assembly varies to reach a minimum value, at the point opposite to that of the initial position. This value is equal to the difference of the main-extension arm lengths.

Entre cette position et le point mort haut, la longueur croît pour devenir égale à la longueur du bras principal à l'endroit du point mort haut
Depuis le point mort haut jusqu'à la position initiale, la longueur de l'ensemble manivelles croit pour atteindre sa valeur maximale, égale à la somme des longueurs bras principal + prolongateur. Between this position and the top dead center, the length increases to become equal to the length of the main arm at the top dead center
From top dead center to the initial position, the length of the crank assembly increases to reach its maximum value, equal to the sum of the length of the main arm + extension.

Conclusion : Le geste de pédalage est toujours effectué suivant un cercle dont le centre devient le centre virtuel de pédalier. Ce centre est décalé par rapport au centre réel du pédalier de la valeur de la longueur du prolongateur.Conclusion: The pedaling gesture is always carried out in a circle whose center becomes the virtual pedal center. This center is offset from the actual center of the crankset by the length of the extension.

Le rayon du cercle de pédalage est égal à la longueur du bras principal. The radius of the pedaling circle is equal to the length of the main arm.

Ce dispositif qui démultiplie la force du pédalage, par l'augmentation du couple en phase active, demande un effort moindre pour fournir un même travail par rapport à un dispositif classique sans prolongateur, ou bien des performances accrues pour un homme qui fournirait les mêmes efforts, toujours par rapport à un dispositif classique sans prolongateur  This device which multiplies the force of pedaling, by increasing the torque in active phase, requires less effort to provide the same work compared to a conventional device without extension, or increased performance for a man who would provide the same efforts , always compared to a conventional device without extension

Claims (6)

REVENDICATIONS 1) Pédalier à manivelles à géométrie variable, applicable aux machines actionnées par la force musculaire, et dans lequel la longueur des manivelles, varie au cours du pédalage, caractérisé en ce que les manivelles sont en deux parties qui sont - le bras principal (2) - son prolongateur (3). 1) Crankset with variable geometry, applicable to machines activated by muscular force, and in which the length of the cranks, varies during pedaling, characterized in that the cranks are in two parts which are - the main arm (2 ) - its extension (3). Que ces deux parties sont articulées l'une par rapport à l'autre au moyen d'une liaison mécanique (9) entre un pignon fixe (5) solidaire du cadre de la machine (13) et immobile par rapport à celui-ci, et son pignon satellite (6) qui tourne sur luimême en décrivant un cercle autour du pignon fixe (5).That these two parts are articulated relative to each other by means of a mechanical connection (9) between a fixed pinion (5) integral with the frame of the machine (13) and immobile with respect thereto, and its satellite pinion (6) which turns on itself by describing a circle around the fixed pinion (5). Ce pignon satellite (6) est fixé au prolongateur (3) et immobile par rapport à lui de telle sorte que le prolongateur (3) reste toujours perpendiculaire au sens d'application de la force de pédalage exercée sur la pédale (4). This satellite pinion (6) is fixed to the extender (3) and immobile with respect to it so that the extender (3) always remains perpendicular to the direction of application of the pedaling force exerted on the pedal (4). 2) Pédalier selon la revendication 1 caractérisé en ce que la prolongateur (3) est solidaire (et fixe par rapport à lui par l'intermédiaire de son axe (7))du pignon satellite (6) et que ce pignon est lié mécaniquement au pignon fixe (5) (bloqué en rotation), situé dans un même plan, et dans l'axe du pédalier (8). 2) crankset according to claim 1 characterized in that the extension (3) is integral (and fixed relative to it by means of its axis (7)) of the pinion gear (6) and that this pinion is mechanically linked to the fixed pinion (5) (locked in rotation), located in the same plane, and in the axis of the crankset (8). 3) Pédalier selon la revendication 1 caractérisé en ce que la liaison mécanique (9) est assurée par - la chaine - la courroie crantée - le train de pignon - l'arbre renvoi d'angle à pignons côniques - les combinaisons des moyens ci dessus.  3) Crankset according to claim 1 characterized in that the mechanical connection (9) is provided by - the chain - the toothed belt - the pinion gear - the bevel gear shaft with bevel gears - combinations of the above means . 4) Dispositif selon les revendications 1, 2 et 3 caractérisé par la position du bras anti-rotation (10) du pignon (5) situé entre la face extérieure du plateau (12) et la face inférieure du bras principal (2). 4) Device according to claims 1, 2 and 3 characterized by the position of the anti-rotation arm (10) of the pinion (5) located between the outer face of the plate (12) and the underside of the main arm (2). 5) Dispositif selon la revendication 4 caractérisé en ce que le pignon fixe (5) est supporté par l'axe du pédalier (8), au moyen d'un roulement (11). 5) Device according to claim 4 characterized in that the fixed pinion (5) is supported by the axle of the crankset (8), by means of a bearing (11). 6) Dispositif selon les revendications 1, 2 et 3 pour ce qui concerne la manivelle symétrique, le pignon (5) étant fixé directement sur la boite de pédalier (1).  6) Device according to claims 1, 2 and 3 with regard to the symmetrical crank, the pinion (5) being fixed directly on the bottom bracket (1). 11 - Roulement d'appui 12 - Plateau de transmission 13 - Cadre machine 14 - Transmission  11 - Support bearing 12 - Transmission plate 13 - Machine frame 14 - Transmission REPERES ET DESIGNATION DES COMPOSANTS (côté plateau de transmission) 1 - Bote pédalier 2 - Bras principal 3 - Prolongateur 4 - Pédale 5 - Pignon fixe 6 - Pignon satellite 7 - Axe prolongateur 8 - Axe pédalier 9 - Liaison mécanique 10 - Bras anti-rotationREFERENCES AND DESIGNATION OF THE COMPONENTS (transmission side) 1 - Bottom bracket 2 - Main arm 3 - Extension 4 - Pedal 5 - Fixed pinion 6 - Satellite pinion 7 - Extension pin 8 - Pedal pin 9 - Mechanical link 10 - Anti-arm rotation
FR8408012A 1984-05-23 1984-05-23 Pedal box with cranks of variable geometry. Pending FR2564796A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8408012A FR2564796A1 (en) 1984-05-23 1984-05-23 Pedal box with cranks of variable geometry.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8408012A FR2564796A1 (en) 1984-05-23 1984-05-23 Pedal box with cranks of variable geometry.

Publications (1)

Publication Number Publication Date
FR2564796A1 true FR2564796A1 (en) 1985-11-29

Family

ID=9304298

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8408012A Pending FR2564796A1 (en) 1984-05-23 1984-05-23 Pedal box with cranks of variable geometry.

Country Status (1)

Country Link
FR (1) FR2564796A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2752557A1 (en) * 1996-08-23 1998-02-27 Tellier Philippe Emile Alfred Pedal drive for bicycle
BE1013772A5 (en) * 2000-02-09 2002-08-06 Jeugt Julien V D Cog mechanism with adjustable pedal supports for bicycles etc.
WO2003104074A1 (en) * 2002-05-06 2003-12-18 Bojan Boncelj Fast bicycle with two-fold pedals
FR2889158A1 (en) * 2005-07-28 2007-02-02 Andre Farison Pedal assembly e.g. for a bicycle has cranks with pivoted extensions and additional chainwheel to reduce effort
JP6978801B1 (en) * 2020-10-08 2021-12-08 雄一郎 小池 S-shaped crank interlocking shaft

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR541909A (en) * 1921-10-03 1922-08-03 Crank system transforming rectilinear motion into circular motion
FR611341A (en) * 1926-02-18 1926-09-25 Crank or crank with variable lever arm
FR665032A (en) * 1928-12-03 1929-09-13 Crank whose arm length varies automatically during its rotation, more particularly applicable to the actuation of cycles
FR753798A (en) * 1933-04-04 1933-10-24 Propulsion device for cycles
FR959255A (en) * 1950-03-28
FR974821A (en) * 1948-11-12 1951-02-26 Compass system for varying the length of the bicycle crank arm by a continuous mechanism

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR959255A (en) * 1950-03-28
FR541909A (en) * 1921-10-03 1922-08-03 Crank system transforming rectilinear motion into circular motion
FR611341A (en) * 1926-02-18 1926-09-25 Crank or crank with variable lever arm
FR665032A (en) * 1928-12-03 1929-09-13 Crank whose arm length varies automatically during its rotation, more particularly applicable to the actuation of cycles
FR753798A (en) * 1933-04-04 1933-10-24 Propulsion device for cycles
FR974821A (en) * 1948-11-12 1951-02-26 Compass system for varying the length of the bicycle crank arm by a continuous mechanism

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2752557A1 (en) * 1996-08-23 1998-02-27 Tellier Philippe Emile Alfred Pedal drive for bicycle
BE1013772A5 (en) * 2000-02-09 2002-08-06 Jeugt Julien V D Cog mechanism with adjustable pedal supports for bicycles etc.
WO2003104074A1 (en) * 2002-05-06 2003-12-18 Bojan Boncelj Fast bicycle with two-fold pedals
FR2889158A1 (en) * 2005-07-28 2007-02-02 Andre Farison Pedal assembly e.g. for a bicycle has cranks with pivoted extensions and additional chainwheel to reduce effort
JP6978801B1 (en) * 2020-10-08 2021-12-08 雄一郎 小池 S-shaped crank interlocking shaft

Similar Documents

Publication Publication Date Title
FR2872776A1 (en) REAR SUSPENSION ANTI-PUMPING OF TWO-WHEELED VEHICLE
FR2527542A1 (en) PEDAL MECHANISM FOR BICYCLE
FR2534216A1 (en) DERAILLEUR FOR CYCLE WITH ADJUSTABLE CHAIN GUIDANCE DEVICE
FR2564796A1 (en) Pedal box with cranks of variable geometry.
FR2697204A1 (en) Angle fold device comprising a balancing system.
FR2639602A1 (en) Improved crank of a bicycle crank gear, crank gear provided with these cranks and bicycle provided with this crank gear
FR2843364A1 (en) Cycle pedal gear comprises two crank supports eccentrically positioned on driving cog rotational axis, rotation of cranks carrying pedals transmitted to driving cog by lugs on cranks displacing in runners connected to driving cog axis
WO1991009766A1 (en) Mechanical conversion device of the double-crank type with variable angular offset of the cranks, and crank gear obtained with such device
CH397513A (en) Machine for forming, filling and sealing bags or sachets of soft-sided packaging
FR2550752A1 (en) Pedal box with variable gear ratio
FR2782546A1 (en) Alternating rotating movement into circular movement converter for bicycle drive has crank driving sun and planet pinions connected by chain
FR2701246A1 (en) Improved pedal and crank assembly system for a bicycle
FR2917060A1 (en) Bicycle's crankset, has connection elements formed of driving cranks of driving pedals and rod, which is articulated on rotating plate of movement transmission mechanisms and on driving cranks
BE435794A (en)
FR2646825A1 (en) Novel technique for propelling a vehicle with pedals
FR2566361A1 (en) Improvements to cranks of cycle pedal boxes.
FR2773769A1 (en) Two crank pedal gear enabling immediate permutation of driving force from one crank to other
FR2878815A1 (en) Belt mechanism for e.g. bicycle, has levers receiving belt driving force applied by user, and having link point for connection to belts driven on pulleys joined to free wheel, where belts are maintained at constant tension by return spring
FR2856374A1 (en) CRANK FOR A BICYCLE CRANKSET AND CRANKSET PROVIDED WITH SUCH CRANKS
BE502473A (en)
FR2624087A1 (en) Propulsion system for a vehicle, particularly bicycle, using the muscular energy of the arms and legs
BE507545A (en)
CH217381A (en) Bicycle crankset.
FR2633241A1 (en) Device for pedalling more effectively
FR2806371A1 (en) Cycle pedal gear system comprises two crank pedal mechanism symmetrically mounted around rotational axis and pedal path modified during rotation into asymmetrical path