FR2868143A1 - Gear ratio modifying device for continuously variable transmission, has axle driving band-chains which slide along roller-gears to vary diameter of semi-circles formed by roller-gears, to continuously modify ratio according to need - Google Patents

Gear ratio modifying device for continuously variable transmission, has axle driving band-chains which slide along roller-gears to vary diameter of semi-circles formed by roller-gears, to continuously modify ratio according to need Download PDF

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Publication number
FR2868143A1
FR2868143A1 FR0403049A FR0403049A FR2868143A1 FR 2868143 A1 FR2868143 A1 FR 2868143A1 FR 0403049 A FR0403049 A FR 0403049A FR 0403049 A FR0403049 A FR 0403049A FR 2868143 A1 FR2868143 A1 FR 2868143A1
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France
Prior art keywords
gears
roller
gear ratio
continuously
chains
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FR0403049A
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French (fr)
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Jean Charles Dufeu
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Individual
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Individual
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H9/00Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members
    • F16H9/02Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion
    • F16H9/24Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using chains or toothed belts, belts in the form of links; Chains or belts specially adapted to such gearing

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmissions By Endless Flexible Members (AREA)

Abstract

The device has a double series of roller-gears (2) disposed face to face and in semi-circles perpendicularly around a drive axle (1). The axle drives band-chains (4) which slide along the roller-gears to vary the diameter of the semi-circles, in order to continuously modify the gear ratio according to the need. Two tilting arms (5) enclose the band-chains and control the action of sliding.

Description

La présente invention concerne un dispositif permettant de modifier leThe present invention relates to a device for modifying the

rapport de démultiplication d'une transmission; ceci de façon continue et permanente,sans changement de pignonnerie avec un nombre de rapports de démultiplication non  gear ratio of a transmission; this continuously and permanently, without change of gear with a number of gear ratios not

limités. Traditionnellement,les dispositifs connus comportent des pignons, des pressions de fluides,ou des poulies à pas variables ou non. Ces dispositifs sont souvent lourds,encombrants,complexes et couteux. Ils disposent en général d'un nombre restreint de rapports de démultiplication.  limited. Traditionally, the known devices comprise gears, fluid pressures, or variable pitch or non-variable pulleys. These devices are often heavy, bulky, complex and expensive. They usually have a limited number of gear ratios.

Le dispositif selon l'invention permet de remédier à ces inconvénients. En effet,les composants sont simples et peu couteux,ils permettent d'obtenir un nombre de rapports de démultiplication quasi infini et une variation en continu.  The device according to the invention overcomes these disadvantages. Indeed, the components are simple and inexpensive, they make it possible to obtain a number of ratios of reduction of almost infinite and a variation in continuous.

Dispositif permettant de modifier le rapport de démultipli- cation d'une transmission en variation continue,sans change-ment de pignonnerie caractérisé par le fait qu'il comporte une double série de rouleaux-engrenages rotatifs disposés face à face et en demi-cercle perpendiculairement autour de l'axe d'entrainement et que ceux-ci entraînent une bande- -chaine,laquelle coulisse le long des rouleaux pour faire varier le diamètre des demi-cercles,afin de modifier en continu et à la demande le rapport de démultiplication,et de deux bras basculants qui commandent le dit coulissement.  Device for modifying the gear ratio of a continuously variable transmission without change of gearing characterized in that it comprises a double series of rotating gear rollers arranged facing each other and in a semicircle perpendicularly around the drive shaft and that they cause a -chain strip, which slides along the rollers to vary the diameter of the half-circles, in order to change continuously and on demand the gear ratio, and two rocking arms that control said sliding.

Les dessins annexés illustrent l'invention: 5-La figure 1 représente,en coupe,le dipositif global de l'invention.  The accompanying drawings illustrate the invention: FIG. 1 represents, in section, the overall dipositive of the invention.

-La figure 2 représente,en coupe et vue de dessus,le détail des rouleauxengrenages(2) et de la bande-chaine(4)illustrant l'entrainement.  FIG. 2 represents, in section and in plan view, the detail of the gear rollers (2) and of the chain-band (4) illustrating the drive.

30-La figure 3 représente le détail illustré par la fenêtre(7) dans la figure 1,montrant une partie d'un bras basculant(5) de commande,et le coulissement vertical,qui entraine la différence de diamètre et donc, la variation de rapport.  3 represents the detail illustrated by the window (7) in FIG. 1, showing a part of a tilting arm (5) of control, and the vertical sliding, which causes the difference in diameter and therefore, the variation report.

Le dispositif objet de l'invention comporte un axe d'èntrainément(1)qui, soit par prise directe,soit par renvois d'angles(3)entraine une double série de rouleaux-engrenages(2) rotatifs et disposés face à face en demicercle autour de l'axe d'entrainement. Les rouleaux-engrenages(2)sont appariés deux à deux et face à face(fig.2). Cette disposition leur permet d'entrainer,ou inversement,d'être entraînés par une bande-chaine(4)qui passe au milieu(fig.2). A cet effet,la bande-chaine(4)comporte une denture extérieure qui est appariée à la denture des rouleaux-engrenages(2). Les rouleauxengrenages(2)sont dentés sur toute leur longueur longitudinalement à leur axe de rotation. Cela permet à la denture de la bande-chaine(4)de coulisser à la demande le long des rou- leaux-engrenages(2),tout en continuant à entraîner ou à être entraînée par la force motrice. A cet effet,il sera parfois nécessaire de calculer un certain jeu entre les rouleauxengrenages(2) et la bande-chaine(4)de manière à faciliter le coulissement entre eux. Le coulissement de la bande-chaine(4) tout le long des rouleaux-engrenages(2)représente l'élément qui permet la variation du diamètre du demi-cercle formé par les rouleaux engrenages(2). Cette variation engendre le changement en continu du rapport de démultiplication. Ainsi,la longueur des rouleaux- engrenages(2)détermine l'amplitude de démultiplication de la transmission.  The device which is the subject of the invention comprises an axle (1) which, either by direct grip or by angle references (3), causes a double series of rotating gear rollers (2) arranged face to face in circle around the drive shaft. The gear rollers (2) are paired in pairs and face to face (fig.2). This arrangement allows them to cause, or conversely, to be driven by a band-chain (4) which passes in the middle (fig.2). For this purpose, the warp-belt (4) has an external toothing which is matched to the toothing of the gear rollers (2). The gear rollers (2) are toothed along their length longitudinally at their axis of rotation. This allows the chain-belt toggle (4) to slide on demand along the gear rollers (2) while continuing to drive or be driven by the driving force. For this purpose, it will sometimes be necessary to calculate a certain clearance between the gear rollers (2) and the warp-belt (4) so as to facilitate sliding between them. The sliding of the warp (4) all along the gear rollers (2) represents the element which allows the variation of the diameter of the semicircle formed by the gear rollers (2). This variation gives rise to the continuous change of the gear ratio. Thus, the length of the gear rollers (2) determines the gearing down amplitude of the transmission.

Dans le système complet(fig.1)on a deux dispositifs identiques disposés face à face et reliés entre eux par la bandechaine(4)comme dans le montage de deux poulies d'un système classique. L'un des dispositifs est l'émetteur de la force motrice,l'autre le récepteur et vice versa.  In the complete system (fig.1) there are two identical devices arranged face to face and interconnected by the bandechaine (4) as in the assembly of two pulleys of a conventional system. One of the devices is the transmitter of the driving force, the other the receiver and vice versa.

La commande du système complet est composée de deux bras basculants(5) chacun autour d'un axe central. A l'extrémité extérieure de ces bras basculants(5)sont disposés face à face des galets rotatifs qui enserrent la bande-chaine(4)et per- mettent de la guider tout le long des rouleaux-engrenages(2) ce qui entraine,à la demande,l'augmentation ou la diminution du diamètre du demi- cercle. Les bras basculants(5)sont mus par une commande centrale(6)en va et vient,qui les entraine ensembles et simultanément;de telle sorte que l'ouverture ou augmentation d'un côté,entraine ipso facto la fermeture ou diminution de l'autre côté et vice versa.  The control of the complete system is composed of two rocking arms (5) each around a central axis. At the outer end of these tilting arms (5) are rotational rollers facing each other, which enclose the warp (4) and guide it all the way along the gear rollers (2). on demand, increasing or decreasing the diameter of the half-circle. The tilting arms (5) are driven by a central control (6) back and forth, which drives them together and simultaneously, so that the opening or increase of one side, ipso facto causes the closing or decrease of the other side and vice versa.

Cette disposition,avec effet de basculement réciproque des bras basculants(5)permet; d'une part,de conserver cons-tante la tension de la bande-chaine(4); d'autre part,de doubler la capacité de démultiplication de l'ensemble du système.  This arrangement, with reciprocal tilting effect of the tilting arms (5) allows; on the one hand, to keep the tension of the warp (4) constant; on the other hand, to double the scaling capacity of the entire system.

A titre d'exemple,cette commande centrale(6)peut être actionnée manuellement à la manière d'un curseur ou d'une commande similaire; ou automatiquement avec à titre d'exemple un classique système centrifuge à masselottes,lié au régime de rotation de la force motrice.  For example, this central control (6) can be operated manually in the manner of a cursor or a similar command; or automatically with as an example a classic centrifugal feeder system, linked to the rotational speed of the driving force.

Selon les besoins,le dispositif,dans sa globalité,pourra être enserré et contenu dans un carter étanche permettant le graissage par barbotage,avec de l'huile approprée.  Depending on the needs, the device, in its entirety, can be contained and contained in a sealed casing for splash lubrication, with appropriate oil.

Toujours selon les besoins(par exemple:La puissance motrice à transmettre),la taille,les matériaux,la forme des dentures, ou la résistance des différents éléments seront étudiés au cas par cas,en fonction de la demande et des différents paramètres en présence.  Always according to the needs (for example: The driving power to be transmitted), the size, the materials, the shape of the teeth, or the resistance of the various elements will be studied on a case by case basis, according to the demand and the different parameters in the presence .

Le dispositif selon l'invention est particulièrement destiné à remplacer les boites de vitesses ou les variateurs des transmissions sur les véhicules terrestres,nautiques voire aériens,ou sur différentes machinesoutils,etc... Ce dispositif peut être commandé manuellement ou automatiquement.  The device according to the invention is particularly intended to replace gearboxes or variators of transmissions on land vehicles, nautical or even air, or on various machine tools, etc ... This device can be controlled manually or automatically.

2868143 42868143 4

Claims (3)

REVENDICATIONS 1/Dispositif permettant de modifier le rapport de démultiplication d'une transmission en variation continue,sans changement de pignonnerie caractérisé par le fait qu'il comporte une double série de rouleauxengrenages(2) rotatifs disposés face à face et en demi-cercle perpendiculairement autour de l'axe d'entrainement(l)et que ceux-ci entraînent une bande-chaine(4)laquelle coulisse le long des rouleauxengrenages(2)pour faire varier le diamètre des demi-cercles afin de modifier en continu et à la demande le rapport de démultiplication et de deux bras basculants(5)qui commandent le dit coulissement.  1 / Device for modifying the gear ratio of a continuously variable transmission, without change of gearing characterized by the fact that it comprises a double series of rotating gearwheels (2) arranged face to face and in a semicircle perpendicularly around of the drive shaft (1) and that these cause a chain-belt (4) which slides along the gear rollers (2) to vary the diameter of the half-circles in order to modify continuously and on demand the gear ratio and two tilting arms (5) which control said sliding. 2/Dispositif selon la revendication 1 caractérisé par le fait que le moyen destiné à entrainer les rouleauxengrenages(2) et à coulisser le long de leur axe est une bande-chaine(4)à denture extérieure appariée à la denture des rouleaux-engrenages(2).  2 / Apparatus according to claim 1 characterized in that the means for driving the gear rollers (2) and slide along their axis is a band-chain (4) with external toothing matched to the gear teeth toothing ( 2). 3/Dispositif selon la revendication 1 caractérisé par le fait que l'ensemble(fig.1)est commandé par des bras bascu- lants(5)permettant l'action de coulissement simultané sur l'ensemble du dispositif grâce à une commande centrale(6) en va et vient qui les entraine ensembles et simultanément de telle sorte que l'augmentation d'un côté,entraine ipso facto la diminution de l'autre côté et vice versa.  3 / Device according to claim 1 characterized in that the assembly (fig.1) is controlled by tilting arms (5) for simultaneous sliding action on the entire device through a central control ( 6) back and forth which drives them together and simultaneously so that the increase on one side, ipso facto leads to the decrease on the other side and vice versa.
FR0403049A 2004-03-25 2004-03-25 Gear ratio modifying device for continuously variable transmission, has axle driving band-chains which slide along roller-gears to vary diameter of semi-circles formed by roller-gears, to continuously modify ratio according to need Withdrawn FR2868143A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0403049A FR2868143A1 (en) 2004-03-25 2004-03-25 Gear ratio modifying device for continuously variable transmission, has axle driving band-chains which slide along roller-gears to vary diameter of semi-circles formed by roller-gears, to continuously modify ratio according to need

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0403049A FR2868143A1 (en) 2004-03-25 2004-03-25 Gear ratio modifying device for continuously variable transmission, has axle driving band-chains which slide along roller-gears to vary diameter of semi-circles formed by roller-gears, to continuously modify ratio according to need

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FR2868143A1 true FR2868143A1 (en) 2005-09-30

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FR0403049A Withdrawn FR2868143A1 (en) 2004-03-25 2004-03-25 Gear ratio modifying device for continuously variable transmission, has axle driving band-chains which slide along roller-gears to vary diameter of semi-circles formed by roller-gears, to continuously modify ratio according to need

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE399580C (en) * 1920-01-27 1924-07-24 Healey Syndicate Ltd Sprocket change gear
US4167124A (en) * 1977-04-01 1979-09-11 Dso "Rodopa" Variable-speed chain drive unit
DE10016575A1 (en) * 2000-04-03 2001-10-04 Serkan Doganer Link wheels (link wheels with compensating sprockets / compensating belt wheels for a continuously adjustable chain drive / belt drive

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE399580C (en) * 1920-01-27 1924-07-24 Healey Syndicate Ltd Sprocket change gear
US4167124A (en) * 1977-04-01 1979-09-11 Dso "Rodopa" Variable-speed chain drive unit
DE10016575A1 (en) * 2000-04-03 2001-10-04 Serkan Doganer Link wheels (link wheels with compensating sprockets / compensating belt wheels for a continuously adjustable chain drive / belt drive

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Effective date: 20051130