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WO2008012591A1 - Improved transmission chain and conical plate variable control - Google Patents

Improved transmission chain and conical plate variable control Download PDF

Info

Publication number
WO2008012591A1
WO2008012591A1 PCT/IB2006/001998 IB2006001998W WO2008012591A1 WO 2008012591 A1 WO2008012591 A1 WO 2008012591A1 IB 2006001998 W IB2006001998 W IB 2006001998W WO 2008012591 A1 WO2008012591 A1 WO 2008012591A1
Authority
WO
WIPO (PCT)
Prior art keywords
meshing
link
grooves
trays
transmission
Prior art date
Application number
PCT/IB2006/001998
Other languages
French (fr)
Inventor
Jean-Claude Corbet
Original Assignee
Jean-Claude Corbet
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 Jean-Claude Corbet filed Critical Jean-Claude Corbet
Priority to PCT/IB2006/001998 priority Critical patent/WO2008012591A1/en
Publication of WO2008012591A1 publication Critical patent/WO2008012591A1/en

Links

Classifications

    • 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
    • F16GBELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G5/00V-belts, i.e. belts of tapered cross-section
    • F16G5/16V-belts, i.e. belts of tapered cross-section consisting of several parts
    • 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

Definitions

  • the present invention relates to a transmission chain and its associated conical plate mechanical variator.
  • Receiveiver trays are mounted on a receiver shaft parallel to the motor shaft and a transmission link is wrapped around both the motor and receiver trays.
  • a first family of drives uses adhesion between the load transmitter components. These drives generally have a fairly simple control of the various positions giving the different gear ratios. On the other hand, all these variators show a slip in contact made with adhesion. This family of drives is for example used as Continuous Variation Transmission for motor vehicles.
  • a second family of drives uses non-slip mechanical contacts. These drives give a transmission ratio exactly equal to the ratio of the geometric positions since there is no sliding contact. These drives are generally characterized by better performance.
  • each tapered motor and receiver plate has radial grooves with a continuous and variable pitch slot profile according to the height of the tray.
  • the two conical plates (motor or receiver) facing each other are angularly positioned so that the two crenelated profiles are offset with the groove of one facing the merlon of the other.
  • the chain used in this variator consists of several links articulated between them, inside each of which is mounted a dozen blades parallel to each other and each transversely sliding. Some of these blades mesh with a groove of one of the trays and the others meshes with the groove immediately consecutive and offset from the other plate opposite.
  • a displacement of a plate relative to that opposite causes a different distribution of the number of blades meshing with the grooves of the same plate.
  • This stepper variator has a high efficiency but the angular setting of a conical plate relative to the other facing, must be extremely precise to avoid any risk of blocking the chain between the motor trays or between those receiving.
  • the object of the invention is then to propose a solution for a variable speed drive of the second family which does not have the abovementioned disadvantages.
  • the subject of the invention is a transmission chain comprising a transmission link of fixed length and capable of being closed on itself, a plurality of meshing members, each integral with a part of the link of longitudinally elastically deformable transmission, each end of which is adapted to mesh with that of the grooves, characterized in that each end of meshing member is of complementary shape with the grooves with which it is adapted to mesh, and in that each meshing member is mounted free in longitudinal translation relative to the transmission link portion to which it is secured, the assembly being such that each member returns, in the unengined state, to a corresponding equilibrium position in step determined between two consecutive meshing members whose consecutive link parts are aligned in the same direction in the non-geared state.
  • the invention also relates to a conical plate speed variator, of the type consisting of a pair of conical engine plates whose facing faces are provided with grooves, each mounted fixed in rotation around a motor shaft but with at least one of the two mounted free in translation along the shaft, by a pair of conical receiving plates whose facing faces are also provided with grooves, mounted identically to the motor trays but around a receiving shaft parallel to the motor shaft , and by a transmission chain comprising a transmission link of fixed length and closed on it even in order to wind in both the groove formed by the motor trays and in that formed by the receiving trays, a plurality of meshing members, each secured to a portion of the transmission link elastically longitudinally indeformable and of which each end of the member is adapted to come into mesh with the grooves of the two plates situated on the same side of the link, a variator in which a displacement between the two motor plates occurs simultaneously with a displacement between the two receiving plates of the same distance but in the opposite direction, characterized in that the grooves of one and
  • two perfectly joined consecutive grooves join together forming a single vertex.
  • the chain according to the invention allows an attack and a meshing output with the trays perfectly tangential, which improves the operating efficiency with respect to variator chains according to the invention.
  • the trays do not need to be made and mounted on their respective shaft with great precision and the chain is very easy to assemble.
  • the present invention also relates to the features which will emerge during the following description, which should be considered in isolation or in all their possible technical combinations.
  • FIGS. 1a and 1b are schematic views showing the general principle of operation of the conical plate mechanical variators according to which the variator according to the invention operates;
  • FIGS. 2a to 2g are different views of a first embodiment of the tray and chain drive according to the invention.
  • Figure 3 is a view of another embodiment of the chain according to the invention.
  • Figures 4a to 4c are views of another embodiment of the chain according to the invention.
  • Figure 5 is a side view of the outer face of another embodiment of a conical plate according to the invention.
  • Figure 6 is a schematic view common to all embodiments of the invention, which shows the chain according to the invention in the wound state.
  • FIGS. 1a and 1b show the functional block diagram of a variator (1) with conical plates according to the invention.
  • This variator (1) is of the type consisting of a pair (2) of conical engine plates (20,21) facing each other, each mounted fixed in rotation about a motor shaft (3) but with one of the two (21) mounted free in translation along the shaft (3), by a pair (4) of conical trays (40,41), mounted identically to the motor trays (2) but around a tree receiver (5) parallel to the motor shaft (3) (the conical plate (40) being freely mounted in translation along the shaft (5)) and by a transmission chain (6).
  • This variator (1) is of the type operating by meshing, the transmission chain (6) comprising a transmission link (60) of frozen length and closed on itself which winds in both the throat formed by the motor plates (20,21) and in that formed by the receiving plates (40,41) / and a plurality of meshing members (62), each integral with a portion of the transmission link elastically longitudinally indeformable (61) and each end of which member engages with each of the grooves (200,400) (or 210,410) of the two motor and receiver plates (20, 40) (or 21,41) located on the same side of the link, the grooves of trays on the same side of the link having the same shape.
  • the transmission chain (6) comprising a transmission link (60) of frozen length and closed on itself which winds in both the throat formed by the motor plates (20,21) and in that formed by the receiving plates (40,41) / and a plurality of meshing members (62), each integral with a portion of the transmission link elastically longitudinally indeformable (61) and each end of
  • Figures 2a to 2e are views showing a drive (1) with a chain (6) made according to a first embodiment of the invention.
  • the transmission chain (6) is pre-positioned, with mounting, without tension around the groove (22) formed by the two motor trays and that formed (42) by the two trays ( 40,41).
  • the transmission chain (6) meshes with the two motor plates (20, 21), the facing faces of which are each provided with identical grooves (200, 210) which are contiguous and arranged radially from the center (O) of the tray.
  • the preferred form of the grooves (200) and (210) here is triangular.
  • the grooves (200) of a motor plate (20) are also identical to those (210) of the other motor plate (21) and are positioned so that their bottom (200a, 210a) are aligned with each other.
  • the chain (6) meshes with the two receiving trays
  • the grooves (400,410) of a receiving tray (40) are also identical to those (410) of the other tray (41) and are positioned so that their bottom (400a, 410a) are aligned with each other.
  • the four conical trays (20), (21), (40), (41) are identical and therefore each have on their outer face identical and contiguous grooves (200), (210), ( 400), (410).
  • the transmission chain (6) here comprises, according to this first embodiment, a link (60) consisting of a single continuous link (60) in the form of a core (61) made of a longitudinally elastically deformable material.
  • the meshing members (62) each integral with the core (61), are slidably mounted parallel thereto.
  • the core (61) is preferably made, from manufacture, being closed on itself. On this core (61) are fixed by being regularly distributed stops (63) which each constitute a support (63) for transmitting the force during the meshing of a meshing member (62) immediately consecutive or immediately preceding . These stops (63) are in the first embodiment ( Figures 2d-2e) reported on the core (61) as follows: the core (61) is clamped strongly between the body of the stop (630) and the washer (631) which is pushed by a screw (632) through a nut (633) directly mounted inside the lower body (630).
  • stops (63) can be provided.
  • these stops (63) can be made directly during the manufacture of the core, in particular on the model of the notches made on the known toothed belts.
  • the double-tooth preferably has two identical ends in the form of a tooth (620), (621) with a triangular profile with a profile exactly complementary to that of the grooves (200), (210), (400), (410) to fit exactly when meshing.
  • the double-tooth (62) extends being fixed between two flanges (622a, 622b) identical pivotally mounted about an axis (623), a roller (624) being mounted itself in rotation around of this axis (623) ( Figure 2f), the assembly thus constituting a carriage (625).
  • the distance separating the lower part of the double tooth (62) and the roller (624) is equal to the thickness of the core (61) (FIG. 2d-FIG. 2g) such that each carriage (625) can slide on the web (61) without clearance.
  • the gap between the two flanges (622a, 622b) is such that each (622a), (622b) comes to slide with direct contact against each lateral edge of the web (61). This gap thus maintains the double-tooth (62) fixed transversely to the core (61).
  • the double-tooth (62) is mounted with direct contact between two identical blocks (64) made of elastically compressible material, each of these two blocks (64) being in direct bearing against a stop (63).
  • These blocks (64) thus each form a compression spring (Figure 2d- Figure 2g), as will be explained below.
  • each double-tooth (62) is mounted transversely fixed but free in translation relative to the longitudinal direction (x-x ') of the core (61) to which it is secured ( Figure 2g), around a equilibrium position corresponding to the determined step (p) between two double-teeth
  • This non-interlocked state is the state in which the double tooth (62), in its equilibrium position, is in the (N-E) zone between the motor and receiver trays (FIG. 2a-FIG. 2b). In this area (N-
  • Each double-toothed end (620), (621) movable on the web (61) is individually engaged in the grooves (200), (400) (or (210), (410)) formed on the trays, by compressing the spring blocks (64).
  • the motor torque applied to the motor trays (20), (21) drives the teeth (62) which will compress the spring blocks (64) on which they are supported.
  • the springs (64) transmit the force they receive to the stops (63) fixed on the core, thereby putting it in tension.
  • the receiver torque will be proportional to the force applied to the transmission link (6) and the winding radius of the link on the receiving trays (40), (41).
  • the tooth (62 ') fits exactly in the groove (210') of the motor plate.
  • the driving action of the motor plate (21) drives the tooth (62 ') which compresses the immediately consecutive spring block (64').
  • the latter then transmits the transmission load to the immediately consecutive stop (63 ') which locally increases the tension of the core (61).
  • the transmission of the load is carried out in the same way for the tooth (62 ") immediately consecutive, the spring block (64 '") consecutive second and the abutment (63 ") immediately consecutive.
  • the groove plate is receiver (40), (41) (also Figure 2g) then the core (61) arrives taut in the groove (42) formed by the two receiving trays (40), (41).
  • the abutment (63 ') urges the spring block (64') in compression to transmit the force to the tooth (62 "), which is in contact with the groove (410") of the receiving plate (41). causes a torque proportional to the load and the winding radius of the core (61) around the receiving groove (42).
  • FIG. 3 illustrates a second embodiment of the chain (6) according to the invention.
  • the transmission link (6) consists of two cables (65a), (65b) identical and continuous being parallel to each other around each of which are slidably mounted organs meshing (62) which are also double teeth (620), (621). More exactly, each end (620), (621) of double-tooth is pierced with a hole (6200), (6210) in which one of the two cables passes.
  • each double-tooth (62) is here pivotally mounted about an axis (66) itself around which are also pivotally mounted one end of a first connecting rod (67) and a second connecting rod (68). ).
  • the other end of this first link (67) is pivotally mounted about another axis (69) which is integral with an immediately preceding abutment flange (70) secured to each cable (65a), (65b) by intermediate of a piece forming a cable clamp (71) which thus clamps the cable (65a), (65b) transversely.
  • this second connecting rod (68) is pivotally mounted about another axis (69) which is integral with an immediately adjacent abutment flange (70 ') attached to each cable (65a), (65b) of identical to the flange (70).
  • all stops (70), (70 '), (70 ") are therefore identical.
  • a helical compression spring (72), (72 '), (72 ") ... is mounted between a double tooth (62) and an abutment (70) which surround it in this preferred embodiment.
  • two springs (72), (72 ') on either side of the same double-tooth (62) are identical so that in its equilibrium position each double-tooth (62), (62'), (62 ") is located exactly in the middle of the cable segment (65a), (65b) delimited by two consecutive stops (70), (70 '), (70") ...
  • FIGS 4a to 4c are views of a third embodiment of the chain according to the invention.
  • the transmission link (6) consists of links (73) hinged to each other, inside each of which is slidably mounted a double-tooth (62). More exactly, each link (73) consists of two flanges
  • each end of double-tooth (620), (621) has a slider portion (6200), (6210) which slides directly into a corresponding slot (730a), (731a) provided for this purpose in each flange (730), (731).
  • a helical compression spring (75), (75 '), (75 ") ... is mounted between each double-tooth (62) and each axis (74), (74'), (74") ... which frame it ( Figure 4c).
  • each part of the transmission link (6) to which is secured a meshing member (62) extends individually in a longitudinal direction.
  • each double-tooth (62) is mounted perpendicular to the link portion to which it is secured, other assemblies and / or accessories may be provided so that the plane containing the edges of the teeth (62a), (62b) is inclined relative to the longitudinal axis of the portion of the transmission link (6) to which it is secured.
  • This inclination promotes correct orientation of the double teeth (62) at the beginning of the meshing with each groove of the trays with which it meshes.
  • it may be a tab integral with the tooth and disposed upstream thereof in the direction of the meshing and which is first supported against the subsequent block spring (64) and thus change its inclination before the introduction of the tooth in a groove.
  • this leg will be chosen at best to ensure the desired inclination.
  • the sliding hole of the double-tooth (62) can be drilled along an axis not perpendicular to the longitudinal axis of the double-tooth which directly gives an inclination to the different mounting.
  • the drilling direction of the hole will be chosen best to ensure the desired inclination.
  • it may be from the manufacture of the double-tooth to orient the tooth ends relative to the slider portion.
  • the double tooth (62) has two teeth identical to the triangular profile
  • other embodiments may be provided such that the two ends of each meshing member have a profile. different.
  • the contiguous grooves, of triangular profile, identical on the four plates are made radially, it can be made non-radially ( Figure 5).
  • the chain used according to the invention may have meshing members orthogonal to the link portion with which they are individually secured.
  • the angle ⁇ of grooving with respect to the radius of the plate will be chosen according to the inclination of the meshing members at the beginning meshing.
  • Such non-radial grooving makes it possible, if necessary, to simplify the manufacture of members, such as teeth, and to improve the transmission line of the force.
  • the meshing engagement of each meshing member is effected in this case on a radius greater than the winding radius of the chain on the opposite plates but with an angle (X, which makes the moment of resulting attack on the trays concerned.
  • the chain according to the invention thus designed thus makes it possible to manage the variable pitch during meshing by means of elastic positioning and return means in longitudinal translation.
  • the variator according to the invention which has just been described makes it possible to have an exact and simple control of all the desired ratios between the motor shaft and the receiver shaft.
  • each meshing member on the link portion to which it is secured is such that it is sliding on the link portion without transverse movement, it can very well be provided an assembly with possible transverse clearance but limited compared to the link. This limited transverse travel must within the scope of the invention be sufficient to favor, during the attack of a plate by the chain, the meshing of the member on a given groove of a plate without there being meshing with any of the grooves of the opposite plate and, when winding the chain around the two plates opposite, there is a meshing with two grooves of different trays opposite.

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

Abstract

Transmission chain (6) comprising a transmission link (60,61,65,73) of a set length and capable of being closed on itself, a plurality of meshing units (62), each attached to a part of the transmission link (61,65a-65b,73-73'-73') longitudinally elastically undeformable, the end of each unit (620, 621) being able to mesh with grooves (200,210,400,410), characterized in that each meshing unit end (620,621) is complementary in shape to that of the grooves (200,210,400,410), with which it is able to mesh, and in that each meshing unit (62) is mounted free in longitudinal translation with respect to the transmission link part to which it is attached, the assembly being such that each unit (62) returns, in the non-meshed state (N-E), to a position of equilibrium corresponding to the specific pitch (p) between two consecutive meshing units the link parts of which (61,65a-65b,73-73'-73'...) are aligned in the same direction (X-X').

Description

CHAINE DE TRANSMISSION PERFECTIONNEE ET VARIATEUR DE VITESSE A PLATEAUX CONIQUES ASSOCIE IMPROVED TRANSMISSION CHAIN AND TAPERED SPEED VARIATOR ASSOCIATED WITH
La présente invention concerne une chaîne de transmission et son variateur mécanique à plateaux coniques associé.The present invention relates to a transmission chain and its associated conical plate mechanical variator.
Différentes familles de variateurs mécaniques à plateaux coniques sont connues. Dans ces variateurs, dont le principe de fonctionnement est montré aux figures la et Ib, deux plateaux coniques dits « plateaux moteur » sont montés sur un arbre moteur et deux plateaux coniques ditsDifferent families of mechanical variators with conical plates are known. In these variators, the operating principle of which is shown in FIGS. 1a and 1b, two conical trays called "motor trays" are mounted on a motor shaft and two conical trays known as
« plateaux récepteur » sont montés sur un arbre récepteur parallèle à l'arbre moteur et un lien de transmission s'enroule à la fois autour des plateaux moteur et récepteur."Receiver trays" are mounted on a receiver shaft parallel to the motor shaft and a transmission link is wrapped around both the motor and receiver trays.
Une première famille de variateurs utilise l'adhérence entre les composants transmetteurs de la charge. Ces variateurs ont en général une commande assez simple des diverses positions donnant les différents rapports de vitesse. Par contre, tous ces variateurs font apparaître un glissement au contact réalisé avec adhérence. Cette famille de variateurs est par exemple utilisée en tant que Transmission à Variation Continue pour véhicules automobiles.A first family of drives uses adhesion between the load transmitter components. These drives generally have a fairly simple control of the various positions giving the different gear ratios. On the other hand, all these variators show a slip in contact made with adhesion. This family of drives is for example used as Continuous Variation Transmission for motor vehicles.
Une deuxième famille de variateurs utilise des contacts mécaniques sans glissement. Ces variateurs donnent un rapport de transmission exactement égal au rapport des positions géométriques puisqu'il n'y a pas de glissement au contact. Ces variateurs se caractérisent en général par un meilleur rendement.A second family of drives uses non-slip mechanical contacts. These drives give a transmission ratio exactly equal to the ratio of the geometric positions since there is no sliding contact. These drives are generally characterized by better performance.
Parmi cette deuxième famille, certains reprennent le principe du variateur à courroie trapézoïdale, mais en remplaçant cette courroie par une chaîne capable de définir un pas variable suivant le rayon d'enroulement de la chaîne sur deux plateaux coniques rainures radialement.Among this second family, some take the principle of the V-belt drive, but replacing this belt by a chain capable of defining a variable pitch according to the winding radius of the chain on two conical plates grooved radially.
On peut citer ici le variateur de vitesse mécanique désigné sous la marque commerciale « POSIVA 3 » dans lequel chaque plateau conique moteur et récepteur présente des rainures radiales avec un profil en créneau à pas variable et continu selon la hauteur du plateau. Dans ce variateur, les deux plateaux coniques ( moteur ou récepteur) en regard l'un de l'autre sont positionnés angulairement de telle sorte à ce que les deux profils en créneau sont décalés avec la rainure de l'un en regard du merlon de l'autre.There may be mentioned here the mechanical speed variator designated under the trademark "POSIVA 3" in which each tapered motor and receiver plate has radial grooves with a continuous and variable pitch slot profile according to the height of the tray. In this variator, the two conical plates (motor or receiver) facing each other are angularly positioned so that the two crenelated profiles are offset with the groove of one facing the merlon of the other.
La chaîne utilisée dans ce variateur est constituée de plusieurs maillons articulés entre eux, à l'intérieur de chacun desquels est montée une dizaine de lames parallèles entre elles et chacune transversalement coulissante. Certaines de ces lames engrènent avec une rainure d'un des plateaux et les autres engrènent avec la rainure immédiatement consécutive et décalée de l'autre plateau en regard.The chain used in this variator consists of several links articulated between them, inside each of which is mounted a dozen blades parallel to each other and each transversely sliding. Some of these blades mesh with a groove of one of the trays and the others meshes with the groove immediately consecutive and offset from the other plate opposite.
Un déplacement d'un plateau par rapport à celui en regard provoque une répartition différente du nombre de lames engrenées avec les rainures d'un même plateau.A displacement of a plate relative to that opposite causes a different distribution of the number of blades meshing with the grooves of the same plate.
Ce variateur pas à pas présente un rendement élevé mais le calage angulaire d'un plateau conique par rapport à l'autre en regard, doit être extrêmement précis pour éviter tout risque de blocage de la chaîne entre les plateaux moteur ou entre ceux récepteur.This stepper variator has a high efficiency but the angular setting of a conical plate relative to the other facing, must be extremely precise to avoid any risk of blocking the chain between the motor trays or between those receiving.
En pratique, les rainures doivent être réalisées avec une extrême précision, le calage angulaire doit être très précis. En outre cette chaîne peut engendrer à la sortie des plateaux d'engrènement un phénomène de succion nuisible au rendement global de la chaîne.In practice, the grooves must be made with extreme precision, the angular setting must be very precise. In addition this chain can generate at the output of meshing trays a sucking phenomenon detrimental to the overall performance of the chain.
Le but de l'invention est alors de proposer une solution pour variateur de vitesse de la deuxième famille qui ne présente pas les inconvénients précités.The object of the invention is then to propose a solution for a variable speed drive of the second family which does not have the abovementioned disadvantages.
A cet effet, l'invention a pour objet une chaîne de transmission comprenant un lien de transmission de longueur figée et apte à être fermé sur lui-même, une pluralité d'organes d'engrènement, solidaires chacun d'une partie du lien de transmission élastiquement indéformable longitudinalement, dont chaque extrémité d'organe est apte à engrener avec celle des rainures, caractérisée en ce que chaque extrémité d'organe d'engrènement est de forme complémentaire avec les rainures avec lesquelles elle est apte à engrener, et en ce que chaque organe d'engrènement est monté libre en translation longitudinale par rapport à la partie de lien de transmission à laquelle il est solidarisé, le montage étant tel que chaque organe revient, à l'état non engrené, dans une position d'équilibre correspondant au pas déterminé entre deux organes d'engrènement consécutifs dont les parties de lien consécutives sont alignées selon la même direction à l'état non engrené.To this end, the subject of the invention is a transmission chain comprising a transmission link of fixed length and capable of being closed on itself, a plurality of meshing members, each integral with a part of the link of longitudinally elastically deformable transmission, each end of which is adapted to mesh with that of the grooves, characterized in that each end of meshing member is of complementary shape with the grooves with which it is adapted to mesh, and in that each meshing member is mounted free in longitudinal translation relative to the transmission link portion to which it is secured, the assembly being such that each member returns, in the unengined state, to a corresponding equilibrium position in step determined between two consecutive meshing members whose consecutive link parts are aligned in the same direction in the non-geared state.
L'invention a également pour objet un variateur de vitesses à plateaux coniques, du type constitué par une paire de plateaux coniques moteur dont les faces en regard sont munies de rainures, montés chacun fixe en rotation autour d'un arbre moteur mais avec au moins l'un des deux monté libre en translation selon l'arbre, par une paire de plateaux coniques récepteur dont les faces en regard sont également munies de rainures, montés identiquement aux plateaux moteur mais autour d'un arbre récepteur parallèle à l'arbre moteur, et par une chaîne de transmission comprenant un lien de transmission de longueur figée et fermé sur lui- même afin de s'enrouler à la fois dans la gorge formée par les plateaux moteur et dans celle formée par les plateaux récepteur, une pluralité d'organes d'engrènement, solidaires chacun d'une partie du lien de transmission élastiquement indéformable longitudinalement et dont chaque extrémité d'organe est apte à venir engrener avec les rainures des deux plateaux situés du même côté du lien, variateur dans lequel un déplacement entre les deux plateaux moteur se produit simultanément avec un déplacement entre les deux plateaux récepteur d'une même distance mais dans un sens opposé, caractérisé en ce que les rainures d'un même plateau sont substantiellement jointives, en ce que chaque extrémité d'organe d'engrènement est de forme complémentaire avec celle des rainures des deux plateaux situés du même côté du lien, et en ce que chaque organe d'engrènement est monté libre en translation longitudinale et transversale, par rapport à la partie du lien à laquelle il est solidarisé, le montage étant tel que chaque organe revient, à l'état non engrené (N-E), dans une position d'équilibre correspondant au pas déterminé (p) entre deux organes d'engrènement consécutifs dont les parties de lien consécutives sont alignées selon la même direction à l'état non engrené, de manière à ce qu'un écartement donné entre deux plateaux en regard fait prendre à chaque organe d'engrènement une position longitudinale d'engrènement donnée par rapport au lien et à ce qu'un écartement donné différent entre deux plateaux en regard fait prendre à chaque organe d'engrènement une position longitudinale d'engrènement donnée différente par rapport au lien.The invention also relates to a conical plate speed variator, of the type consisting of a pair of conical engine plates whose facing faces are provided with grooves, each mounted fixed in rotation around a motor shaft but with at least one of the two mounted free in translation along the shaft, by a pair of conical receiving plates whose facing faces are also provided with grooves, mounted identically to the motor trays but around a receiving shaft parallel to the motor shaft , and by a transmission chain comprising a transmission link of fixed length and closed on it even in order to wind in both the groove formed by the motor trays and in that formed by the receiving trays, a plurality of meshing members, each secured to a portion of the transmission link elastically longitudinally indeformable and of which each end of the member is adapted to come into mesh with the grooves of the two plates situated on the same side of the link, a variator in which a displacement between the two motor plates occurs simultaneously with a displacement between the two receiving plates of the same distance but in the opposite direction, characterized in that the grooves of one and the same plate are substantially contiguous, in that each end of the meshing member is of complementary shape with that of the grooves of the two plates situated on the same side of the link, and in that each meshing member is freely mounted in longitudinal and transverse translation with respect to the part of the lacquer link it is secured, the assembly being such that each member returns, in the uninhibited state (NE), in a position of equilibrium corresponding to the determined pitch (p) between two consecutive meshing members whose consecutive link parts are aligned in the same direction in the non-intermeshed state, so that a spacing given between two opposite plates causes each meshing member to adopt a given longitudinal meshing position with respect to the link and that a different given spacing between two opposite plates makes each meshing member adopt a given longitudinal meshing position with respect to the link.
On précise ici que dans le cadre de l'invention, on entend par « rainures substantiellement jointives », des rainures dont l'écartement entre leur deux sommets consécutifs les séparant est inférieur ou égal à la largeur d'un organe d'engrènement. Ainsi, deux rainures consécutives parfaitement jointives se rejoignent en formant un seul sommet. Avec une telle configuration de chaîne et de variateur selon l'invention, la commande des différentes positions géométriques définissant les rapports souhaités s'avère très simple.It is specified here that in the context of the invention, the term "substantially contiguous grooves", grooves whose spacing between their two consecutive vertices separating them is less than or equal to the width of a meshing member. Thus, two perfectly joined consecutive grooves join together forming a single vertex. With such a chain and drive configuration according to the invention, the control of the different geometric positions defining the desired ratios is very simple.
La chaîne selon l'invention permet une attaque et une sortie d'engrènement avec les plateaux parfaitement tangentielle, ce qui améliore le rendement de fonctionnement par rapport aux chaînes de variateur selon l'invention.The chain according to the invention allows an attack and a meshing output with the trays perfectly tangential, which improves the operating efficiency with respect to variator chains according to the invention.
De plus, les plateaux n'ont pas besoin d'être réalisés et d'être montés sur leur arbre respectif avec une grande précision et la chaîne est très facile à assembler.In addition, the trays do not need to be made and mounted on their respective shaft with great precision and the chain is very easy to assemble.
La présente invention concerne également les caractéristiques qui ressortiront au cours de la description qui va suivre, et qui devront être considérées isolément ou selon toutes leurs combinaisons techniques possibles.The present invention also relates to the features which will emerge during the following description, which should be considered in isolation or in all their possible technical combinations.
Cette description donnée à titre d'exemple non limitatif, fera mieux comprendre comment l'invention peut être réalisée, en référence aux dessins annexés sur lesquels :This description given by way of non-limiting example, will better understand how the invention can be made, with reference to the accompanying drawings in which:
Les figures la et Ib sont des vues schématiques montrant le principe général de fonctionnement des variateurs mécaniques à plateaux coniques selon lequel le variateur selon l'invention fonctionne;FIGS. 1a and 1b are schematic views showing the general principle of operation of the conical plate mechanical variators according to which the variator according to the invention operates;
Les figure 2a à 2g sont différentes vues d'un premier mode de réalisation du variateur à plateaux et chaîne selon l'invention;FIGS. 2a to 2g are different views of a first embodiment of the tray and chain drive according to the invention;
La figure 3 est une vue d'un autre mode de réalisation de la chaîne selon l'invention; Les figures 4a à 4c sont des vues d'un autre mode de réalisation de la chaîne selon l'invention.Figure 3 is a view of another embodiment of the chain according to the invention; Figures 4a to 4c are views of another embodiment of the chain according to the invention.
La figure 5 est une vue de côté de la face externe d'un autre mode de réalisation d'un plateau conique selon l'invention.Figure 5 is a side view of the outer face of another embodiment of a conical plate according to the invention.
La figure 6 est une vue schématique commune à tous les modes de réalisation de l'invention, qui montre la chaîne selon l'invention à l'état enroulé .Figure 6 is a schematic view common to all embodiments of the invention, which shows the chain according to the invention in the wound state.
Les figures la et Ib montrent le schéma de principe de fonctionnement d'un variateur de vitesses (1) à plateaux coniques selon l'invention.FIGS. 1a and 1b show the functional block diagram of a variator (1) with conical plates according to the invention.
Ce variateur (1) est du type constitué par une paire (2) de plateaux coniques moteur (20,21) en regard l'un de l'autre, montés chacun fixe en rotation autour d'un arbre moteur (3) mais avec l'un des deux (21) monté libre en translation selon l'arbre (3), par une paire (4) de plateaux coniques récepteur (40,41), montés identiquement aux plateaux moteur (2) mais autour d'un arbre récepteur (5) parallèle à l'arbre moteur (3) (le plateau conique (40) étant monté libre en translation selon l'arbre (5)) et par une chaîne de transmission (6).This variator (1) is of the type consisting of a pair (2) of conical engine plates (20,21) facing each other, each mounted fixed in rotation about a motor shaft (3) but with one of the two (21) mounted free in translation along the shaft (3), by a pair (4) of conical trays (40,41), mounted identically to the motor trays (2) but around a tree receiver (5) parallel to the motor shaft (3) (the conical plate (40) being freely mounted in translation along the shaft (5)) and by a transmission chain (6).
Dans ce variateur, un déplacement entre les deux plateaux moteur se produit simultanément avec un déplacement entre les deux plateaux récepteur d'une même distance mais dans un sens opposé : ainsi le rapprochement entre les deux plateaux moteur (20,21) en regard (figure la- figure Ib) provoqué par l'organe unique de déplacement (7) provoque l'écartement simultané des deux plateaux récepteur (40,41) en regard (figure la-figure Ib). Ce variateur (1) selon l'invention est du type fonctionnant par engrènement, la chaîne de transmission (6) comprenant un lien de transmission (60) de longueur figée et fermé sur lui-même qui s'enroule à la fois dans la gorge formée par les plateaux moteur (20,21) et dans celle formée par les plateaux récepteur (40,41)/ et une pluralité d'organes d' engrènement (62), solidaires chacun d'une partie du lien de transmission élastiquement indéformable longitudinalement (61) et dont chaque extrémité d'organe vient engrener avec chacune des rainures (200,400) (ou 210,410) des deux plateaux moteur et récepteur (20, 40) (ou 21,41) situés du même côté du lien, les rainures des plateaux situés du même côté du lien ayant la même forme.In this variator, a displacement between the two motor trays occurs simultaneously with a displacement between the two receiving trays of the same distance but in an opposite direction: thus the approximation between the two motor trays (20,21) opposite (FIG. Figure Ib) caused by the single displacement member (7) causes the simultaneous separation of the two receiving trays (40,41) opposite (Figure 1-figure Ib). This variator (1) according to the invention is of the type operating by meshing, the transmission chain (6) comprising a transmission link (60) of frozen length and closed on itself which winds in both the throat formed by the motor plates (20,21) and in that formed by the receiving plates (40,41) / and a plurality of meshing members (62), each integral with a portion of the transmission link elastically longitudinally indeformable (61) and each end of which member engages with each of the grooves (200,400) (or 210,410) of the two motor and receiver plates (20, 40) (or 21,41) located on the same side of the link, the grooves of trays on the same side of the link having the same shape.
Les figures 2a à 2e sont des vues représentant un variateur (1) avec une chaîne (6) réalisés selon un premier mode de l'invention.Figures 2a to 2e are views showing a drive (1) with a chain (6) made according to a first embodiment of the invention.
Dans ce variateur (1), la chaîne de transmission (6) est positionnée au préalable, au montage, sans tension autour de la gorge (22) formée par les deux plateaux moteur et de celle formée (42) par les deux plateaux récepteur (40,41).In this variator (1), the transmission chain (6) is pre-positioned, with mounting, without tension around the groove (22) formed by the two motor trays and that formed (42) by the two trays ( 40,41).
La chaîne (6) de transmission engrène d'une part avec les deux plateaux moteur (20,21) dont les faces en regard sont chacune munies de rainures (200, 210) identiques, jointives et ménagées radialement depuis le centre (O) du plateau. La forme préférée des rainures (200) et (210) est ici triangulaire. Les rainures (200) d'un plateau moteur (20) sont également identiques à celles (210) de l'autre plateau moteur (21) et elles sont positionnées de telle sorte que leur fond (200a, 210a) soient alignés entre eux. La chaîne (6) engrène d'autre part avec les deux plateaux récepteurThe transmission chain (6) meshes with the two motor plates (20, 21), the facing faces of which are each provided with identical grooves (200, 210) which are contiguous and arranged radially from the center (O) of the tray. The preferred form of the grooves (200) and (210) here is triangular. The grooves (200) of a motor plate (20) are also identical to those (210) of the other motor plate (21) and are positioned so that their bottom (200a, 210a) are aligned with each other. The chain (6) meshes with the two receiving trays
(40,41) dont les faces en regard sont également chacune munies de rainures (400,410) identiques, jointives et ménagées radialement depuis le centre (O) du plateau correspondant. . La forme préférée des rainures 200 et 210 est ici triangulaire. Les rainures (400) d'un plateau récepteur (40) sont également identiques à celles (410) de l'autre plateau récepteur (41) et elles sont positionnées de telle sorte que leur fond (400a, 410a) sont alignés entre eux.(40,41) whose opposite faces are each also provided with grooves (400,410) identical, contiguous and arranged radially from the center (O) of the corresponding plate. . The preferred form of the grooves 200 and 210 is here triangular. The grooves (400) of a receiving tray (40) are also identical to those (410) of the other tray (41) and are positioned so that their bottom (400a, 410a) are aligned with each other.
Dans ce mode de réalisation, les quatre plateaux coniques (20),(21),(40),(41) sont donc identiques et présentent donc chacun sur leur face externe des rainures identiques et jointives (200),(210),(400),(410).In this embodiment, the four conical trays (20), (21), (40), (41) are identical and therefore each have on their outer face identical and contiguous grooves (200), (210), ( 400), (410).
Dans la configuration des figures 2a et 2b , les plateaux moteur (20),(21) sont rapprochés au maximum, la chaîne (6) s' enroulant autour de leur partie supérieure, les plateaux récepteur (40),(41) sont écartés au maximum, la chaîne (6) s' enroulant autour de leur partie inférieure.In the configuration of Figures 2a and 2b, the motor trays (20), (21) are brought to the maximum, the chain (6) wrapping around their upper part, the receiving trays (40), (41) are spaced apart at most, the chain (6) wrapping around their lower part.
La chaîne (6) de transmission comprend ici, selon ce premier mode de réalisation, un lien (60) constitué d'un lien unique continu (60) sous la forme d'une âme (61) réalisée en un matériau élastiquement indéformable longitudinalement. Les organes d'engrènement (62) solidaires chacun de l'âme (61), sont montés coulissant parallèlement à celle-ci.The transmission chain (6) here comprises, according to this first embodiment, a link (60) consisting of a single continuous link (60) in the form of a core (61) made of a longitudinally elastically deformable material. The meshing members (62) each integral with the core (61), are slidably mounted parallel thereto.
L'âme (61) est de préférence réalisée, dès la fabrication, en étant fermée sur elle-même. Sur cette âme (61) sont fixées en étant régulièrement réparties des butées (63) qui constituent chacun un appui (63) pour transmettre l'effort lors de l'engrènement d'un organe d'engrènement (62) immédiatement consécutif ou immédiatement précédent. Ces butées (63) sont dans le premier mode de réalisation (figures 2d-2e) rapportés sur l'âme (61) de la manière suivante : l'âme (61) est pincée fortement entre le corps de la butée (630) et la rondelle (631) qui est poussée par une vis (632) traversant un écrou (633) directement monté à l'intérieur de la partie inférieure du corps (630).The core (61) is preferably made, from manufacture, being closed on itself. On this core (61) are fixed by being regularly distributed stops (63) which each constitute a support (63) for transmitting the force during the meshing of a meshing member (62) immediately consecutive or immediately preceding . These stops (63) are in the first embodiment (Figures 2d-2e) reported on the core (61) as follows: the core (61) is clamped strongly between the body of the stop (630) and the washer (631) which is pushed by a screw (632) through a nut (633) directly mounted inside the lower body (630).
Bien entendu, d'autres modes de réalisation des butées (63) peuvent être prévus. Par exemple, ces butées (63) peuvent être réalisées directement lors de la fabrication de l'âme, notamment sur le modèle des crans réalisés sur les courroies crantées connues.Of course, other embodiments of the stops (63) can be provided. For example, these stops (63) can be made directly during the manufacture of the core, in particular on the model of the notches made on the known toothed belts.
Entre deux butées (63) consécutives fixées sur l'âme (61), est montée coulissante une double dent (62) au dessus de l'âme (61).Between two stops (63) consecutive fixed on the core (61) is slidably mounted a double tooth (62) above the core (61).
Plus exactement la double-dent présente de manière préférée deux extrémités identiques sous la forme d'une dent (620), (621) au profil triangulaire de profil exactement complémentaire à celui des rainures (200),(210),(400),(410) afin de s'encastrer exactement lors de l'engrènement.More exactly, the double-tooth preferably has two identical ends in the form of a tooth (620), (621) with a triangular profile with a profile exactly complementary to that of the grooves (200), (210), (400), (410) to fit exactly when meshing.
Plus exactement encore, la double-dent (62) s'étend en étant fixée entre deux flasques (622a,622b) identiques montées pivotantes autour d'un axe (623), un galet (624) étant monté lui-même en rotation autour de cet axe (623) (figure 2f), l'ensemble constituant ainsi un chariot (625). La distance séparant la partie inférieure de la double-dent (62) et le galet (624) est égale à l'épaisseur de l'âme (61) (figure 2d-figure 2g) telle que chaque chariot (625) peut coulisser sur l'âme (61) sans jeu. L'écart entre les deux flasques (622a,622b) est tel que chacun (622a),(622b) vient glisser avec contact direct contre chaque bord latéral de l'âme (61). Cet écart maintient donc la double-dent (62) fixe transversalement par rapport à l'âme (61).More exactly, the double-tooth (62) extends being fixed between two flanges (622a, 622b) identical pivotally mounted about an axis (623), a roller (624) being mounted itself in rotation around of this axis (623) (Figure 2f), the assembly thus constituting a carriage (625). The distance separating the lower part of the double tooth (62) and the roller (624) is equal to the thickness of the core (61) (FIG. 2d-FIG. 2g) such that each carriage (625) can slide on the web (61) without clearance. The gap between the two flanges (622a, 622b) is such that each (622a), (622b) comes to slide with direct contact against each lateral edge of the web (61). This gap thus maintains the double-tooth (62) fixed transversely to the core (61).
Plus exactement enfin, la double-dent (62) est montée avec contact direct entre deux blocs (64) identiques réalisés en matériau compressible élastiquement, chacun de ces deux blocs (64) étant en appui direct contre une butée (63). Ces blocs (64) forment ainsi chacun un ressort de compression (figure 2d-figure 2g), comme il le sera expliqué ci-après.More precisely finally, the double-tooth (62) is mounted with direct contact between two identical blocks (64) made of elastically compressible material, each of these two blocks (64) being in direct bearing against a stop (63). These blocks (64) thus each form a compression spring (Figure 2d-Figure 2g), as will be explained below.
Ainsi, chaque double-dent (62) est montée fixe transversalement mais libre en translation par rapport à la direction longitudinale (x-x') de l'âme (61) à laquelle elle est solidarisée (figure 2g), autour d'une position d'équilibre correspondant au pas déterminé (p) entre deux double-dentsThus, each double-tooth (62) is mounted transversely fixed but free in translation relative to the longitudinal direction (x-x ') of the core (61) to which it is secured (Figure 2g), around a equilibrium position corresponding to the determined step (p) between two double-teeth
(62) consécutives alignées selon la même direction ( X-X') à l'état non engrené (figure 2d). Cet état non engrené est l'état dans lequel la double- dent (62), dans sa position d'équilibre, se trouve dans la zone (N-E) entre les plateaux moteur et récepteur (figure 2a-figure 2b). Dans cette zone (N-(62) consecutive aligned in the same direction (X-X ') in the non-geared state (Figure 2d). This non-interlocked state is the state in which the double tooth (62), in its equilibrium position, is in the (N-E) zone between the motor and receiver trays (FIG. 2a-FIG. 2b). In this area (N-
E), la partie de l'âme (61) est alignée selon une trajectoire droite et chaque extrémité d'une double-dent (62) n'est en contact avec aucune rainureE), the portion of the web (61) is aligned in a straight path and each end of a double-tooth (62) is not in contact with any groove
(200),(210),(400),(410) et aucun ressort (64) n'est sollicité.(200), (210), (400), (410) and no spring (64) is biased.
Le fonctionnement du variateur (1) selon le premier mode de réalisation de l'invention va maintenant être expliqué :The operation of the variator (1) according to the first embodiment of the invention will now be explained:
Chaque extrémité de double-dents (620),(621) mobile sur l'âme (61) s'accroche individuellement dans les rainures (200),(400) (ou (210),(410)) pratiquées sur les plateaux, en comprimant, les blocs formant ressort (64).Each double-toothed end (620), (621) movable on the web (61) is individually engaged in the grooves (200), (400) (or (210), (410)) formed on the trays, by compressing the spring blocks (64).
Le couple moteur appliqué aux plateaux moteurs (20),(21) entraîne les dents (62) qui vont comprimer les blocs formant ressort (64) sur lesquels elles sont en appui. Les ressorts (64) transmettent l'effort qu'ils reçoivent aux butées (63) fixés sur l'âme, le mettant ainsi en tension.The motor torque applied to the motor trays (20), (21) drives the teeth (62) which will compress the spring blocks (64) on which they are supported. The springs (64) transmit the force they receive to the stops (63) fixed on the core, thereby putting it in tension.
Sous l'effet de cette tension, les butées (63) se trouvant dans la gorge (42) formée par les deux plateaux récepteurs (40),(41) compriment les blocs formant ressort (64) sur lesquels ils sont en appui. Les blocs formant ressort (64) transmettent finalement cet effort aux dents (62) qui sont accrochées sur les deux plateaux récepteurs (40),(41).Under the effect of this voltage, the stops (63) in the groove (42) formed by the two receiving trays (40), (41) compress the spring blocks (64) on which they are supported. The blocks forming spring (64) finally transmit this force to the teeth (62) which are hooked on the two receiving trays (40), (41).
Le couple récepteur sera ainsi proportionnel à l'effort appliqué au lien de transmission (6) et au rayon d'enroulement du lien sur les plateaux récepteurs (40),(41).The receiver torque will be proportional to the force applied to the transmission link (6) and the winding radius of the link on the receiving trays (40), (41).
Plus précisément, dans le cas où le plateau rainure est moteur (20), (21) (figure 2g) alors la dent (62') s'encastre exactement dans la rainure (210') du plateau moteur. L'action motrice du plateau moteur (21) entraîne la dent (62') qui comprime le bloc formant ressort immédiatement consécutif (64'). Celui-ci transmet alors la charge de transmission à la butée immédiatement consécutive (63') qui augmente localement la tension de l'âme (61). La transmission de la charge se réalise de la même manière pour la dent (62") immédiatement consécutive, le bloc formant ressort (64'") consécutif en deuxième et la butée (63") immédiatement consécutive.More specifically, in the case where the groove plate is motor (20), (21) (Figure 2g) then the tooth (62 ') fits exactly in the groove (210') of the motor plate. The driving action of the motor plate (21) drives the tooth (62 ') which compresses the immediately consecutive spring block (64'). The latter then transmits the transmission load to the immediately consecutive stop (63 ') which locally increases the tension of the core (61). The transmission of the load is carried out in the same way for the tooth (62 ") immediately consecutive, the spring block (64 '") consecutive second and the abutment (63 ") immediately consecutive.
Dans le cas où le plateau rainure est récepteur (40),(41) (également figure 2g) alors l'âme (61) arrive tendue dans la gorge (42) formée par les deux plateaux récepteur (40),(41). La butée (63') sollicite en compression le bloc formant ressort (64') pour transmettre l'effort à la dent (62"). Celle-ci, en contact avec la rainure (410") du plateau récepteur (41) l'entraîne en fournissant un couple proportionnel à la charge et au rayon d'enroulement de l'âme (61) autour de la gorge réceptrice (42).In the case where the groove plate is receiver (40), (41) (also Figure 2g) then the core (61) arrives taut in the groove (42) formed by the two receiving trays (40), (41). The abutment (63 ') urges the spring block (64') in compression to transmit the force to the tooth (62 "), which is in contact with the groove (410") of the receiving plate (41). causes a torque proportional to the load and the winding radius of the core (61) around the receiving groove (42).
La figure 3 illustre un deuxième mode de réalisation de la chaîne (6) selon l'invention.FIG. 3 illustrates a second embodiment of the chain (6) according to the invention.
Dans ce deuxième mode, le lien de transmission (6) est constitué de deux câbles (65a), (65b) identiques et continus en étant parallèles entre eux autour de chacun desquels sont montés coulissant les organes d'engrènement (62) qui sont également des double-dents (620),(621). Plus exactement, chaque extrémité (620),(621) de double-dent est percée d'un trou (6200),(6210) dans lequel un des deux câbles passe.In this second mode, the transmission link (6) consists of two cables (65a), (65b) identical and continuous being parallel to each other around each of which are slidably mounted organs meshing (62) which are also double teeth (620), (621). More exactly, each end (620), (621) of double-tooth is pierced with a hole (6200), (6210) in which one of the two cables passes.
La partie centrale de chaque double-dent (62) est ici montée pivotante autour d'un axe (66) lui-même autour duquel sont montées également pivotante une extrémité d'une première bielle (67) et d'une deuxième bielle (68). L'autre extrémité de cette première bielle (67) est montée pivotante autour d'un autre axe (69) qui fait corps avec une bride formant butée (70) immédiatement précédente, fixée à chaque câble (65a),(65b) par l'intermédiaire d'un pièce formant pince-câble (71) qui pince donc le câble (65a),(65b) transversalement. L'autre extrémité de cette deuxième bielle (68) est montée pivotante autour d'un autre axe (69) qui fait corps avec une bride formant butée (70') immédiatement consécutive, fixée à chaque câble (65a),(65b) de manière identique à la bride (70). Dans cet exemple préféré, toutes les butées (70),(70'),(70")...sont donc identiques.The central portion of each double-tooth (62) is here pivotally mounted about an axis (66) itself around which are also pivotally mounted one end of a first connecting rod (67) and a second connecting rod (68). ). The other end of this first link (67) is pivotally mounted about another axis (69) which is integral with an immediately preceding abutment flange (70) secured to each cable (65a), (65b) by intermediate of a piece forming a cable clamp (71) which thus clamps the cable (65a), (65b) transversely. The other end of this second connecting rod (68) is pivotally mounted about another axis (69) which is integral with an immediately adjacent abutment flange (70 ') attached to each cable (65a), (65b) of identical to the flange (70). In this preferred example, all stops (70), (70 '), (70 ")... Are therefore identical.
Un ressort hélicoïdal de compression (72),(72'),(72")...est monté entre une double-dent (62) et une butée (70) qui l'encadrent. Dans cet exemple de réalisation préféré, les deux ressorts (72),(72') de part et d'autre d'une même double-dent (62) sont identiques de sorte que dans sa position d'équilibre chaque double-dent (62),(62'),(62") est située exactement au milieu du segment de câble (65a),(65b) délimité par deux butées consécutives (70),(70'),(70")...A helical compression spring (72), (72 '), (72 ") ... is mounted between a double tooth (62) and an abutment (70) which surround it in this preferred embodiment. two springs (72), (72 ') on either side of the same double-tooth (62) are identical so that in its equilibrium position each double-tooth (62), (62'), (62 ") is located exactly in the middle of the cable segment (65a), (65b) delimited by two consecutive stops (70), (70 '), (70") ...
Les figures 4a à 4c sont des vues d'un troisième mode de réalisation de la chaîne selon l'invention. Dans ce mode de réalisation, le lien de transmission (6) est constitué de maillons (73) articulés entre eux, à l'intérieur de chacun desquels est monté coulissant une double-dent (62). Plus exactement, chaque maillon (73) est constitué de deux flasquesFigures 4a to 4c are views of a third embodiment of the chain according to the invention. In this embodiment, the transmission link (6) consists of links (73) hinged to each other, inside each of which is slidably mounted a double-tooth (62). More exactly, each link (73) consists of two flanges
(730),(731) identiques, l'articulation entre deux maillons consécutifs (73),(73') étant réalisé par un axe (74),(74'). Plus exactement encore, chaque extrémité de double-dent (620),(621) présente une partie formant coulisseau (6200),(6210) qui coulisse directement dans une lumière correspondante (730a),(731a) prévue à cet effet dans chaque flasque (730),(731).(730), (731) identical, the articulation between two consecutive links (73), (73 ') being formed by an axis (74), (74'). More exactly, each end of double-tooth (620), (621) has a slider portion (6200), (6210) which slides directly into a corresponding slot (730a), (731a) provided for this purpose in each flange (730), (731).
Un ressort hélicoïdal de compression (75),(75'),(75")...est monté entre chaque double-dent (62) et chaque axe (74),(74'),(74")...qui l'encadrent (figure 4c). Dans cet exemple de réalisation préféré, une des extrémités des ressorts (75),(75'),(75")... est fixée à un appui (76),(76'),(76") en appui contre le corps central de la double-dent (62) et l'autre extrémité est fixée un autre appui (77),(77'),(77") partie intégrante de chaque axe (74),(74') d'articulation entre deux maillons consécutifs. Dans cet exemple de réalisation préféré, les deux ressorts (75), (75') de part et d'autre d'une même double-dent (62) sont identiques de sorte que dans sa position d'équilibre chaque double-dent (62),(62'),(62") est située exactement au milieu de chaque maillon (73),(73'),(73")... (figure 4c).A helical compression spring (75), (75 '), (75 ") ... is mounted between each double-tooth (62) and each axis (74), (74'), (74") ... which frame it (Figure 4c). In this preferred embodiment, one of the ends of the springs (75), (75 '), (75 ") ... is fixed to a support (76), (76'), (76") bearing against the central body of the double-tooth (62) and the other end is fixed another support (77), (77 '), (77 ") integral part of each axis (74), (74') of articulation between In this preferred embodiment, the two springs (75), (75 ') on either side of the same double-tooth (62) are identical so that in its equilibrium position each double-tooth (62), (62 '), (62 ") is located exactly in the middle of each link (73), (73'), (73") ... (Figure 4c).
Selon tous les modes de réalisation de la chaîne selon l'invention, comme illustré à la figure 6, chaque partie de lien de transmission (6) à laquelle est solidarisé un organe d'engrènement (62) s'étend individuellement selon une direction longitudinale (x-x') de l'âme (60,61,65a-65b) alignée selon un alignement (x-x') différent à l'état engrené, c'est-à-dire dans les zones d'enroulement (E).According to all the embodiments of the chain according to the invention, as illustrated in FIG. 6, each part of the transmission link (6) to which is secured a meshing member (62) extends individually in a longitudinal direction. (x-x ') of the core (60, 61, 65a-65b) aligned in a different alignment (x-x') in the interlocked state, i.e. in the winding zones ( E).
Si dans les trois modes de réalisation, chaque double-dent (62) est montée perpendiculaire à la partie de lien à laquelle elle est solidarisée, d'autres montages et/ ou accessoires peuvent être prévus de telle sorte que le plan contenant les arêtes des dents (62a),(62b) soit incliné par rapport à l'axe longitudinal de la partie du lien de transmission (6) à laquelle il est solidarisé. Cette inclinaison favorise l'orientation correcte de la double- dents (62) au début de l'engrènement avec chaque rainure des plateaux avec lesquelles elle engrène. Par exemple, dans le premier mode de réalisation de la chaîne, il peut s'agir d'une patte partie intégrante de la dent et disposée en amont de celle-ci dans le sens de l'engrènement et qui vient d'abord en appui contre le bloc consécutif formant ressort (64) et ainsi changer son inclinaison avant l'introduction de la dent dans une rainure. La forme et les dimensions de cette patte seront choisies au mieux afin d'assurer l'inclinaison désirée. Dans le deuxième mode de réalisation de la chaîne, le trou de coulissement de la double-dent (62) peut être percé selon une axe non perpendiculaire à l'axe longitudinal de la double-dent qui donne directement une inclinaison au montage différente. La direction de perçage du trou sera choisie au mieux afin d'assurer l'inclinaison désirée. Dans le troisième mode de réalisation de la chaîne, il peut s'agir dès la fabrication de la double-dent d'orienter les extrémités formant dent par rapport à la partie formant coulisseau.If in the three embodiments, each double-tooth (62) is mounted perpendicular to the link portion to which it is secured, other assemblies and / or accessories may be provided so that the plane containing the edges of the teeth (62a), (62b) is inclined relative to the longitudinal axis of the portion of the transmission link (6) to which it is secured. This inclination promotes correct orientation of the double teeth (62) at the beginning of the meshing with each groove of the trays with which it meshes. For example, in the first embodiment of the chain, it may be a tab integral with the tooth and disposed upstream thereof in the direction of the meshing and which is first supported against the subsequent block spring (64) and thus change its inclination before the introduction of the tooth in a groove. The shape and dimensions of this leg will be chosen at best to ensure the desired inclination. In the second embodiment of the chain, the sliding hole of the double-tooth (62) can be drilled along an axis not perpendicular to the longitudinal axis of the double-tooth which directly gives an inclination to the different mounting. The drilling direction of the hole will be chosen best to ensure the desired inclination. In the third embodiment of the chain, it may be from the manufacture of the double-tooth to orient the tooth ends relative to the slider portion.
De même, si dans les trois modes de réalisation proposés, la double- dent (62) présente deux dents identiques au profil triangulaire, d'autres variantes de réalisation peuvent être prévues telles que les deux extrémités de chaque organe d'engrènement ont un profil différent.Similarly, if in the three embodiments proposed, the double tooth (62) has two teeth identical to the triangular profile, other embodiments may be provided such that the two ends of each meshing member have a profile. different.
En outre, si dans le premier mode de réalisation du variateur représenté, les rainures jointives, de profil triangulaire, identiques sur les quatre plateaux sont réalisées radialement, elle peuvent être réalisées non radialement (figure 5). Avec un plateau rainure non radialement, la chaîne utilisée selon l'invention peut présenter des organes d'engrènement orthogonaux à la partie de lien avec laquelle ils sont individuellement solidarisés. L'angle α de rainurage par rapport au rayon du plateau sera choisi en fonction de l'inclinaison des organes d'engrènement en début d'engrènement. Un tel rainurage non radial permet de simplifier le cas échéant la fabrication des organes, tels que des dents , et d'améliorer la ligne de transmission de l'effort. En effet, la prise d'engrènement de chaque organe d'engrènement s'effectue dans ce cas sur un rayon supérieur au rayon d'enroulement de la chaîne sur les plateaux en regard mais avec un angle (X, ce qui uniformise le moment d'attaque résultant sur les plateaux concernés.In addition, if in the first embodiment of the variator shown, the contiguous grooves, of triangular profile, identical on the four plates are made radially, it can be made non-radially (Figure 5). With a non-radially grooved plate, the chain used according to the invention may have meshing members orthogonal to the link portion with which they are individually secured. The angle α of grooving with respect to the radius of the plate will be chosen according to the inclination of the meshing members at the beginning meshing. Such non-radial grooving makes it possible, if necessary, to simplify the manufacture of members, such as teeth, and to improve the transmission line of the force. Indeed, the meshing engagement of each meshing member is effected in this case on a radius greater than the winding radius of the chain on the opposite plates but with an angle (X, which makes the moment of resulting attack on the trays concerned.
La chaîne selon l'invention ainsi conçue permet donc de gérer le pas variable lors de l'engrènement à l'aide de moyens élastiques de positionnement et de rappel en translation longitudinale.The chain according to the invention thus designed thus makes it possible to manage the variable pitch during meshing by means of elastic positioning and return means in longitudinal translation.
Le variateur selon l'invention qui vient d'être décrit permet d'avoir une commande exacte et simple de tous les rapports souhaités entre l'arbre moteur et l'arbre récepteur.The variator according to the invention which has just been described makes it possible to have an exact and simple control of all the desired ratios between the motor shaft and the receiver shaft.
II est particulièrement adapté en tant que transmission de vélos car, contrairement à ceux connus qui utilisent des dérailleurs classiques, il crée une transmission toujours effective et évite donc pour l'utilisateur tous les inconvénients liés au dérayage possible lors de changement de vitesse, en particulier le phénomène de succion.It is particularly suitable as a bicycle transmission because, unlike those known using conventional derailleurs, it creates a transmission always effective and therefore avoids for the user all the disadvantages associated with the possible clutch during gearshift, in particular the suction phenomenon.
Dans cette application, il sera préférable d'utiliser le variateur selon l'invention avec un réducteur à trains planétaires épicycloïdal monté en parallèle permettant d'augmenter la plage de rapports de transmission et/ ou avec un autre variateur selon l'invention également monté en parallèle définissant ainsi un variateur de vitesse double.In this application, it will be preferable to use the drive according to the invention with an epicyclic planetary gear reducer mounted in parallel making it possible to increase the range of transmission ratios and / or with another variator according to the invention also mounted in accordance with the invention. parallel thus defining a double speed variator.
Bien évidemment, d'autres modifications peuvent être apportées sans pour autant sortir du cadre de l'invention. Si dans les modes de réalisation tels qu'illustrés, le montage de chaque organe d'engrènement sur la partie de lien à laquelle il est solidarisé est tel qu'il est coulissant sur la partie de lien sans débattement transversal, il peut très bien être prévu un montage avec débattement transversal possible mais limité par rapport au lien. Ce débattement transversal limité doit dans le cadre de l'invention être suffisant pour privilégier, lors de l'attaque d'un plateau par la chaîne, l'engrènement de l'organe sur une rainure donnée d'un plateau sans qu'il y ait engrènement avec l'une quelconque des rainures du plateau en regard puis, lors de l'enroulement de la chaîne autour des deux plateaux en regard, qu'il y ait un engrènement avec deux rainures de plateaux différents en regard. Of course, other modifications can be made without departing from the scope of the invention. If in the embodiments as illustrated, the mounting of each meshing member on the link portion to which it is secured is such that it is sliding on the link portion without transverse movement, it can very well be provided an assembly with possible transverse clearance but limited compared to the link. This limited transverse travel must within the scope of the invention be sufficient to favor, during the attack of a plate by the chain, the meshing of the member on a given groove of a plate without there being meshing with any of the grooves of the opposite plate and, when winding the chain around the two plates opposite, there is a meshing with two grooves of different trays opposite.

Claims

REVENDICATIONS
1. Chaîne de transmission (6) comprenant un lien de transmission (60,61,65,73) de longueur figée et apte à être fermé sur lui-même, une pluralité d'organes d'engrènement (62), solidaires chacun d'une partie du lien de transmission (61,65a-65b,73-73'-73") indéformable longitudinalement, dont chaque extrémité d'organe est apte à engrener avec des rainures (200,210,400,410) de plateaux coniques correspondants (20,21-40,41), caractérisée en ce que l'organe d'entraînement (62) est constitué par une double dent (620, 621) de forme complémentaire avec celle des rainures (200,210,400,410), avec lesquelles elle est apte à engrener, et en ce que chaque organe d'engrènement (62) est monté mobile élastiquement (64-72,72'-75,75') en translation longitudinale par rapport à la partie de lien de transmission à laquelle il est solidarisé, le montage étant tel que chaque organe (62) revient, à l'état non engrené (N-E), dans une position d'équilibre correspondant au pas déterminé (p) entre deux organes d'engrènement consécutifs dont les parties de lien (61,65a-65b,73-73'-73"...) consécutives sont alignées selon la même direction (X-X').1. Transmission chain (6) comprising a transmission link (60, 61, 65, 73) of fixed length and able to be closed on itself, a plurality of meshing members (62), each secured to each other. a part of the transmission link (61, 65a-65b, 73-73'-73 ") longitudinally deformable, each end of which is adapted to mesh with grooves (200,210,400,410) of corresponding conical plates (20,21- 40,41), characterized in that the drive member (62) is constituted by a double tooth (620, 621) of complementary shape with that of the grooves (200, 210, 400, 410), with which it is capable of meshing, and that each meshing member (62) is mounted elastically (64-72, 72'-75, 75 ') in longitudinal translation relative to the transmission link portion to which it is secured, the assembly being such that each member (62) returns, in the unintroduced state (NE), in a position of equilibrium corresponding to the step rminé (p) between two consecutive meshing members whose consecutive connecting parts (61,65a-65b, 73-73'-73 "...) are aligned in the same direction (X-X ').
2.Chaîne selon la revendication 1, caractérisée en ce qu'elle comprend des moyens de rappel (64-64'-64"..,72-72'-72"...,75-75'-75"...), également solidaires de chaque dite partie du lien (61,65a-65b,73-73'-73"...), pour rappeler l'organe d'engrènement à sa position d'équilibre.2.Chain according to claim 1, characterized in that it comprises return means (64-64'-64 ".., 72-72'-72" ..., 75-75'-75 ".. .), also integral with each said part of the link (61,65a-65b, 73-73'-73 "...), to return the meshing member to its equilibrium position.
3. Chaîne selon la revendication 1 ou 2, caractérisée en ce que le lien de transmission (6) est constitué d'un lien unique continu (61) parallèlement auquel les organes d'engrènement (62) sont montés coulissant.3. Chain according to claim 1 or 2, characterized in that the transmission link (6) consists of a continuous single link (61) parallel to which the meshing members (62) are slidably mounted.
4.Chaîne selon la revendication 1 ou 2, caractérisée en ce que le lien de transmission (6) est constitué de deux câbles identiques (65a,65b) et continus en étant parallèles entre eux autour de chacun desquels sont montés coulissant les organes d'engrènement (62).4.Chain according to claim 1 or 2, characterized in that the transmission link (6) consists of two identical cables (65a, 65b) and continuous being parallel to each other around each of which are slidably mounted meshing members (62).
5. Chaîne selon la revendication 1 ou 2, caractérisée en ce que le lien de transmission (6) est constitué de maillons (73,73', 73"...) articulés entre eux à l'intérieur de chacun desquels est monté coulissant un organe d'engrènement (62).5. Chain according to claim 1 or 2, characterized in that the transmission link (6) consists of links (73,73 ', 73 "...) articulated between them within each of which is slidably mounted a meshing member (62).
ό.Chaîne selon l'une quelconque des revendications 1 à 5, caractérisée en ce que le plan contenant l'arête d'au moins un organe d'engrènement (62) est incliné par rapport à l'axe longitudinal de la partie du lien de transmission à laquelle il est solidarisé.A chain according to any one of claims 1 to 5, characterized in that the plane containing the edge of at least one meshing member (62) is inclined with respect to the longitudinal axis of the portion of the link of transmission to which it is attached.
7.Chaîne selon l'une quelconque des revendications 1 à 6, caractérisée en ce que les deux extrémités (620,621) de chaque organe d'engrènement (62) sont des dents de forme complémentaire aux rainures avec lesquelles elles sont aptes à engrener.7.Chaine according to any one of claims 1 to 6, characterized in that the two ends (620,621) of each meshing member (62) are teeth of complementary shape to the grooves with which they are able to mesh.
δ.Chaîne selon l'une quelconque des revendications 1 à 7, caractérisée en ce que les deux extrémités (620,621) de chaque organe d'engrènement ont un profil identique.δ.Chaine according to any one of claims 1 to 7, characterized in that the two ends (620,621) of each meshing member have an identical profile.
9.Chaîne selon l'une quelconque des revendications 1 à 7, caractérisée en ce que les deux extrémités (620,621) de chaque organe d'engrènement ont un profil différent.9.Chain according to any one of claims 1 to 7, characterized in that the two ends (620,621) of each meshing member have a different profile.
lO.Plateau conique (20,21,40,41), destiné à être engrené avec la chaîne de transmission (6) selon l'une quelconque des revendications 1 à 9, dont la face externe est munie de rainures (200,210,400,410) caractérisé en ce que les rainures sont non radiales. ll.Variateur de vitesses (1) à plateaux coniques, du type constitué par une paire (2) de plateaux coniques (20,21) moteur dont les faces en regard sont munies de rainures (200,210), montés chacun fixe en rotation autour d'un arbre moteur (3) mais avec au moins l'un (21) des deux monté libre en translation selon l'arbre, par une paire (4) de plateaux coniques (40,41) récepteur dont les faces en regard sont également munies de rainures (400,410), montés identiquement aux plateaux moteur mais autour d'un arbre récepteur (5) parallèle à l'arbre moteur (3), et par une chaîne de transmission (6) comprenant un lien de transmission (60,61,65,73) de longueur figée et fermé sur lui-même afin de s'enrouler à la fois dans la gorge (22) formée par les plateaux moteur et dans celle (42) formée par les plateaux récepteur, une pluralité d'organes d'engrènement (62), solidaires chacun d'une partie du lien de transmission élastiquement indéformable, longitudinalement et dont chaque extrémité d'organe (620,621) est apte à venir engrener avec les rainures (200-400,210-410) des deux plateaux situés du même côté du lien (20-40,21-41), variateur dans lequel un déplacement entre les deux plateaux moteur (20,21) se produit simultanément avec un déplacement entre les deux plateaux récepteur (40,41) d'une même distance mais dans un sens opposé, caractérisé en ce que les rainures d'un même plateau (200,210,400,410) sont substantiellement jointives, en ce que chaque extrémité (620,621) d'organe d'engrènement (62) est de forme complémentaire avec celle des rainures (200-400,210-410) des deux plateaux (20-40,21-41) situés du même côté du lien, et en ce que chaque organe d'engrènement (62) est monté libre en translation longitudinale par rapport à la partie du lien à laquelle il est solidarisé, le montage étant tel que chaque organe (62) revient, à l'état non engrené (N-E), dans une position d'équilibre correspondant au pas déterminé (p) entre deux organes d'engrènement consécutifs dont les parties de lien consécutives (61,65a- 65b,73-73'-73" ...) sont alignées selon la même direction (X-X')/ de manière à ce qu'un écartement donné entre deux plateaux en regard fait prendre à chaque organe d'engrènement une position longitudinale d'engrènement donnée par rapport au lien et à ce qu'un écartement donné différent entre deux plateaux en regard fait prendre à chaque organe d'engrènement une position longitudinale d'engrènement donnée différente par rapport au lien.10.A conical tray (20, 21, 40, 41), intended to be meshed with the transmission chain (6) according to any one of claims 1 to 9, the outer face of which is provided with grooves (200, 210, 400, 410) characterized by the grooves are non-radial. 11.Carrier (1) with conical plates, of the type consisting of a pair (2) of tapered trays (20,21) motor whose facing faces are provided with grooves (200,210), each mounted fixed in rotation around a driving shaft (3) but with at least one (21) of the two mounted free in translation according to the shaft, by a pair (4) of conical trays (40,41) receiver whose facing faces are also provided with grooves (400, 410), mounted identically to the motor trays but around a receiving shaft (5) parallel to the motor shaft (3), and by a transmission chain (6) comprising a transmission link (60, 61 , 65, 73) of frozen length and closed on itself in order to wind in both the groove (22) formed by the motor trays and in that (42) formed by the receiving plates, a plurality of members meshing (62), each integral with a portion of the elastically-deformable transmission link, longitudinally and each of which end of member (620, 621) is adapted to come into mesh with the grooves (200-400, 210-410) of the two plates situated on the same side of the link (20-40, 21-41), variator in which a displacement between the two plates motor (20,21) occurs simultaneously with a displacement between the two receiving plates (40,41) of the same distance but in an opposite direction, characterized in that the grooves of the same plate (200,210,400,410) are substantially contiguous , in that each end (620, 621) of meshing member (62) is of complementary shape to that of the grooves (200-400, 210-410) of the two plates (20-40, 21-41) situated on the same side of the link, and in that each meshing member (62) is mounted free in longitudinal translation relative to the portion of the link to which it is secured, the assembly being such that each member (62) returns, in the non state geared (NE), in a position of equilibrium corresponding to the determined step (p) ent re two consecutive meshing members whose consecutive link portions (61, 65-65b, 73-73'-73 "...) are aligned in the same direction (X-X ') / so that a spacing given between two opposite plates makes each meshing member adopt a longitudinal meshing position given in relation to the link and that a given spacing different between two opposite trays makes each meshing member take a given longitudinal meshing position with respect to the link.
12.Variateur selon la revendication 11, caractérisé en ce qu'il comprend des moyens (7) pour provoquer le déplacement simultané entre les deux plateaux moteur avec celui entre les deux plateaux récepteur d'une même distance mais en sens opposé. 12.Variateur according to claim 11, characterized in that it comprises means (7) for causing the simultaneous movement between the two motor trays with that between the two trays receiving the same distance but in opposite directions.
PCT/IB2006/001998 2006-07-20 2006-07-20 Improved transmission chain and conical plate variable control WO2008012591A1 (en)

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WO2013014378A1 (en) 2011-07-22 2013-01-31 Clopet Cyril Mechanism for transmitting power of rotation
CN105276138A (en) * 2014-07-12 2016-01-27 范泽林 Universal toothed chain type stepless speed change transmission device
WO2024148152A1 (en) * 2023-01-04 2024-07-11 Wicko Ethan John Compliant mechanism actuated belt-based continuously variable transmission

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WO2006032206A1 (en) * 2004-09-21 2006-03-30 Beijing Vit Mobile Technologies Co., Ltd Sliding sheet type of variable-teeth gear
FR2881498A1 (en) * 2005-02-01 2006-08-04 Jean Claude Corbet Power transmission chain for infinitely variable speed transmission, has gear mesh units with teeth of complementary shape to that of grooves, where each unit is freely mounted in longitudinal translation relative to transmission line core

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DE224180C (en) * 1908-12-08 1910-07-16 Belt or pulley with two halves that can be moved towards and from one another
US1601662A (en) * 1923-12-10 1926-09-28 Abbott Geoffrey Joseph Power-transmission mechanism
DE849944C (en) * 1950-04-09 1952-09-18 Hugo Albrecht Traction means for speed change gears operating with mutually adjustable toothed conical disks in the axial direction
DE1051600B (en) * 1955-08-24 1959-02-26 Guenter Schmidt Chain wheel change gear with two chain wheels arranged on parallel shafts and a chain that engages positively in the two wheels and wraps them together
DE1122795B (en) * 1958-08-26 1962-01-25 E T H Walter Isler Dipl Ing Infinitely adjustable chain transmission
FR1342041A (en) * 1962-12-29 1963-11-02 Reimers Getriebe Kg Continuous speed variator, with toothed conical pulleys
US3688595A (en) * 1969-11-22 1972-09-05 Johannes Bauer Infinitely variable chain-engaged gearing
US4151980A (en) * 1976-11-26 1979-05-01 Lewmar Marine Limited Winch
US4810237A (en) * 1985-09-09 1989-03-07 Urpo Mantovaara V-belt pulley and drive
WO2006032206A1 (en) * 2004-09-21 2006-03-30 Beijing Vit Mobile Technologies Co., Ltd Sliding sheet type of variable-teeth gear
FR2881498A1 (en) * 2005-02-01 2006-08-04 Jean Claude Corbet Power transmission chain for infinitely variable speed transmission, has gear mesh units with teeth of complementary shape to that of grooves, where each unit is freely mounted in longitudinal translation relative to transmission line core

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013014378A1 (en) 2011-07-22 2013-01-31 Clopet Cyril Mechanism for transmitting power of rotation
US9175755B2 (en) 2011-07-22 2015-11-03 Cyril Clopet Mechanism for transmitting power of rotation
CN105276138A (en) * 2014-07-12 2016-01-27 范泽林 Universal toothed chain type stepless speed change transmission device
WO2024148152A1 (en) * 2023-01-04 2024-07-11 Wicko Ethan John Compliant mechanism actuated belt-based continuously variable transmission

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