WO1998008005A1 - Tension jack with automatic taking up of slack for chain or belt with reversible motion - Google Patents
Tension jack with automatic taking up of slack for chain or belt with reversible motion Download PDFInfo
- Publication number
- WO1998008005A1 WO1998008005A1 PCT/FR1996/001292 FR9601292W WO9808005A1 WO 1998008005 A1 WO1998008005 A1 WO 1998008005A1 FR 9601292 W FR9601292 W FR 9601292W WO 9808005 A1 WO9808005 A1 WO 9808005A1
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- WO
- WIPO (PCT)
- Prior art keywords
- chain
- tensioner
- frame
- belt
- tension
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
- F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
- F16H7/1254—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means
- F16H7/1281—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means where the axis of the pulley moves along a substantially circular path
- F16H7/129—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley without vibration damping means where the axis of the pulley moves along a substantially circular path with means for impeding reverse motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/0808—Extension coil springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
- F16H2007/0853—Ratchets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0863—Finally actuated members, e.g. constructional details thereof
- F16H2007/0874—Two or more finally actuated members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0889—Path of movement of the finally actuated member
- F16H2007/0893—Circular path
Definitions
- the subject of the present invention is a tensioner, and more specifically relates to a device for self-regulating the tension of a belt or of a transmission chain consisting, on the one hand, of two pinions or pulleys of return rotatably mounted at each of the ends of an arm mounted oscillating around a pivot secured to the frame, and arranged in such a way that one of them cooperates with the lower face of a belt or chain end, while the other cooperates with the upper face of the same bnn and on the other hand, an elastic means arranged so as to urge the oscillating arm in rotation: such a device is known to those skilled in the art.
- the member to be energized is an endless chain or belt.
- the forward and reverse parts facing each other and passing over a pinion or a pulley said member must also be tensioned in the event of overshoot or reverse direction
- the swinging arm of the tensioner described above must be requested in rotation by an elastic device conse ⁇ uent. which will have to bear, depending on the direction of movement of the load, the inertia of the latter when starting or stopping.
- This elastic device must therefore be oversized. in order to provide the swingarm with a force far greater than the tension force required by the chain or belt to operate in good conditions
- the purpose of the present invention is to solve these incorrect tension proDlemes specific to reversible systems, by equipping the swinging arm of the tensioner on the one hand with an ⁇ gide unidirectional locking device, said device allowing the immobilization of the tensioner iors ⁇ ue the b ⁇ n of the organ on which it acts is stretched, on the other hand of an elastic tension device allowing the rotation of the tensioning arm, and therefore the catching of the "slack" when the bnn on which it acts is relaxed .
- the elastic tensioning device is dimensioned only to lift the weight of the "soft" bnn of the member which must be tensioned
- the oscillating arm or said rigid unilateral locking device is composed of an elastic part calibrated according to the maximum force transmitted in normal operation by the chain or the belt to be tensioned. Minimal wear of the latter will bring the whole system back to its original conditions.
- a third pinion or a third pulley is installed on the frame of the tensioner according to the invention, on the one hand to remedy possible problems of space by modifying the trajectory of the b ⁇ n on which it will act and secondly, to simplify the establishment of the tensioner by avoiding an ⁇ gide mounting thereof on the frame of the installation.
- the tensioner is thus advised to find a position of equilibrium, corresponding to the perfect alignment of the b ⁇ ns upstream and downstream of the member to be tensioned.
- the tensioner according to the invention is thus no longer subjected to any torque, and therefore requires only a small holding force, parallel to the member to be stretched, to keep its position, since the pinions or rollers of which it is made are mounted idly.
- a lever-shaped extension is fitted on the frame of the tensioner, in order to receive at its end a third idler gear pinion called holding pinion.
- said retaining sprocket With a diameter greater than one of the return sprockets, said retaining sprocket is inserted between the working bnn and the return b ⁇ n of the chain to be stretched, as close as possible to this same return sprocket.
- said retaining pinion keeps a fixed position relative to the return pinion, and therefore maté ⁇ alise a fixed axis of rotation around which the frame of the tensioner can oscillate.
- - Figure 1 is a general view of the tensioner according to the invention, in 13 minimum “soft" take-up position associated with a transmission chain
- - Figure 2 is a general view of the tensioner according to the invention, in the maximum “soft” take-up position associated with a transmission chain
- FIG. 3 is a view along arrow 1 of Figure 1 in partial section, of the swing arm equipped with an elastic slide according to the invention, shown at rest;
- FIG. 4 is a general view of the tensioner in equilibrium according to the invention, simply retained by two cables secured to the frame of the installation 15,16
- FIG. 5 is a general view of the tensioner equipped with a third holding pinion, shown in balance in the maximum "soft" take-up position, associated with a transmission chain;
- Figure 6 shows the same device as Figure 5, in the minimum "soft" take-up position.
- the chain tensioner is intended to be placed on one of the strands of the endless chain intended for force transmission. This is arranged so that the underside of the return strand cooperates with two of the pinions of said tensioner and that the upper face of this same strand cooperates with the third pinion thereof, as shown in FIGS. 1, 2, 4, 5 and 6.
- the tensioner comprises a frame 4, provided with a pivot 14 serving to support a swinging arm 9, a spring 10 making it possible to exert a rotational force on the swinging arm 9, a unilateral locking pawl 8, d 'a spring 11 for exerting a rotational force on this pawl 8, of an idler roller 5 intended, on the one hand, to redirect the strand of the transmission chain on which it is supported and, d 'on the other hand, to make possible the mounting either non-rigid (Fig 4) or completely floating (Fig 5) of the tensioner on the installation.
- the swinging arm 9 is provided with two idler gears 7 and 6 intended to support the transmission chain on the tensioner, with an elastic assembly at one of its ends, according to FIG. 3, comprising a serrated slide 12 and a compression spring 13, this spring having the purpose of admitting a slip between the serrated slide 12 and the oscillating arm 9, in order to limit the maximum tension force applied by the tensioner to the chain.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
Abstract
The invention concerns a tension jack with automatic taking up of looseness for a worm belt or chain. It concerns a self-regulating device for the tension of a transmission belt or chain. It is consists of a frame (4) supporting an arm (9) driven in a unidirectional rotating movement by the action of a spring (10) and a unilaterally blocking device (8,11). The arm (9) is equipped with two loose pinions (6) and (7) for applying to the chain (1) a tension force limited in its peak value by an elastic assembly (12). A loose roller (5) integral with the frame (4) redirects the side of the chain (1) on which the tension jack acts, and enables its being non- rigidly or completely freely mounted on the installation. The device is particularly applicable to bi-directional transmissions since it can operate indifferently on the 'slack' side or the 'taut' side of the element to be tightened.
Description
Tendeur à rattrapage automatique de mou pour chaine ou courroie à mouvement réversible.Automatic slack adjuster for chain or belt with reversible movement.
La présente invention a pour objet un tendeur, et concerne plus précisément un dispositif autoreguiateur de la tension d'une courroie ou d'une chaîne de transmission constitue, d une part de deux pignons ou poulies de renvoi montes rotatifs à chacune des extrémités d'un bras monté oscillant autour d'un pivot solidaire du bâti, et aménagé de façon telle que l'un d'eux coopère avec la face inféπeure d'un bπn de la courroie ou de la chaîne, tandis que l'autre coopère avec la face supéπeure de ce même bnn et d'autre part, d'un moyen élastique aménage de manière a solliciter en rotation le bras oscillant: un tel dispositif est connu de l'homme de l'art.The subject of the present invention is a tensioner, and more specifically relates to a device for self-regulating the tension of a belt or of a transmission chain consisting, on the one hand, of two pinions or pulleys of return rotatably mounted at each of the ends of an arm mounted oscillating around a pivot secured to the frame, and arranged in such a way that one of them cooperates with the lower face of a belt or chain end, while the other cooperates with the upper face of the same bnn and on the other hand, an elastic means arranged so as to urge the oscillating arm in rotation: such a device is known to those skilled in the art.
Lorsque l'organe qui doit être mis sous tension est une chaîne ou une courroie sans fin. les parties aller et les parties retour se faisant face et passant sur un pignon ou une poulie ledit organe αoit également être tendu en cas αe dépassement de cnarge ou d'inversion de direction Pour ce faire, le bras oscillant du tendeur décrit précédemment doit être sollicite en rotation par un dispositif élastique conseαuent. qui devra supporter, en fonction du sens de déplacement de la charge, l'inertie de cette dernière au démarrage ou a l'arrêt. Ce dispositif élastique doit donc être surdimensionne. afin de fournir au bras oscillant un effort bien supérieur a l'effort de tension dont la chaîne ou la courroie a besoin pour fonctionner dans de bonnes conditionsWhen the member to be energized is an endless chain or belt. the forward and reverse parts facing each other and passing over a pinion or a pulley said member must also be tensioned in the event of overshoot or reverse direction To do this, the swinging arm of the tensioner described above must be requested in rotation by an elastic device conseαuent. which will have to bear, depending on the direction of movement of the load, the inertia of the latter when starting or stopping. This elastic device must therefore be oversized. in order to provide the swingarm with a force far greater than the tension force required by the chain or belt to operate in good conditions
En marche normale l'organe a mettre sous tension se trouve ainsi trop tendu, et présente par conséquent une usure prématurée De plus, la plupart des dispositifs élastiques utilises sur ce type de tendeur exercent une force qui n'est pas linéaire avec le déplacement du bras oscillant donc de l'usure de ta chaîne ou de la courroieIn normal operation, the member to be tensioned is thus too tight, and therefore presents premature wear. In addition, most of the elastic devices used on this type of tensioner exert a force which is not linear with the movement of the swing arm so wear on your chain or belt
Le but de la présente invention est de résoudre ces proDlemes de tension incorrecte propres aux systèmes réversibles, en équipant le bras oscillant du tendeur d'une part d'un disposrtif πgide de blocage unilatéral, ledit dispositif permettant l'immobilisation du tendeur iorsαue le bπn de l'organe sur lequel celui-ci agit se trouve tendu, d'autre part d'un dispositif de tension élastique permettant la rotation du bras tendeur, et donc le rattrapage du "mou" lorsque le bnn sur lequel il agit se trouve détendu.The purpose of the present invention is to solve these incorrect tension proDlemes specific to reversible systems, by equipping the swinging arm of the tensioner on the one hand with an πgide unidirectional locking device, said device allowing the immobilization of the tensioner iorsαue the bπn of the organ on which it acts is stretched, on the other hand of an elastic tension device allowing the rotation of the tensioning arm, and therefore the catching of the "slack" when the bnn on which it acts is relaxed .
Dans le tendeur selon l'invention, le dispositif de tension élastique n'est dimensionne que pour soulever le poids du bnn "mou" de l'organe qui doit être mis sous tensionIn the tensioner according to the invention, the elastic tensioning device is dimensioned only to lift the weight of the "soft" bnn of the member which must be tensioned
Dans le cas d'une installation présentant un manque de rigidité au niveau de l'entraxe entre les pignons ou poulies moteur et récepteur, ceux-ci peuvent se rapprocher transrtoirement et engendrer une augmentation inhabituelle du "mou" de l'organe à tendre, qui sera rattrapé complètement et de façon irréversible par le tendeur.
Pour éviter dans ces conditions d'obtenir en régime établi une tension trop importante dans ledit organe à tendre, et selon une version avantageuse de l'invention, le bras oscillant ou ledit dispositif rigide de blocage unilatéral est composé d'une partie élastique tarree suivant l'effort maximum transmis en fonctionnement normal par la chaine ou la courroie à tendre. Une usure minimale de cette dernière ramènera l'ensemble du système dans ses conditions initiales.In the case of an installation exhibiting a lack of rigidity at the center distance between the pinions or pulleys of the motor and the receiver, these can move towards each other and cause an unusual increase in the "softness" of the member to be stretched, which will be completely and irreversibly caught up by the tensioner. To avoid, under these conditions, obtaining an excessively high tension in said steady state in said member to be stretched, and according to an advantageous version of the invention, the oscillating arm or said rigid unilateral locking device is composed of an elastic part calibrated according to the maximum force transmitted in normal operation by the chain or the belt to be tensioned. Minimal wear of the latter will bring the whole system back to its original conditions.
Selon une version avantageuse de l'invention, un troisième pignon ou une troisième poulie est installé sur le bâti du tendeur selon l'invention, afin d'une part de remédier à d'éventuels problèmes d'encombrement en modifiant la trajectoire du bπn sur lequel celui-ci va agir et d'autre part, de simplifier la mise en place du tendeur en évitant un montage πgide de celui-ci sur le bâti de l'installation. En effet, on autonse ainsi le tendeur à trouver une position d'équilibre, correspondant a l'alignement parfait des bπns amont et aval de l'organe à tendre Le tendeur selon l'invention n'est plus ainsi soumis à aucun couple, et ne nécessite donc plus qu'un faible effort de maintien, parallèle à l'organe a tendre, pour garder sa position, car les pignons ou galets dont il est constitué sont montés fous.According to an advantageous version of the invention, a third pinion or a third pulley is installed on the frame of the tensioner according to the invention, on the one hand to remedy possible problems of space by modifying the trajectory of the bπn on which it will act and secondly, to simplify the establishment of the tensioner by avoiding an πgide mounting thereof on the frame of the installation. In fact, the tensioner is thus advised to find a position of equilibrium, corresponding to the perfect alignment of the bπns upstream and downstream of the member to be tensioned. The tensioner according to the invention is thus no longer subjected to any torque, and therefore requires only a small holding force, parallel to the member to be stretched, to keep its position, since the pinions or rollers of which it is made are mounted idly.
Selon une version avantageuse de l'invention spécialement adaptée aux transmissions par chaîne sans fin une extension en forme de levier est aménagée sur le bâti du tendeur, afin de recevoir à son extrémité un troisième pignon monté fou appelé pignon de maintien. De diamètre supérieur à l'un des pignons de renvoi, ledit pignon de maintien est insère entre le bnn de travail et le bπn de retour de la chaîne à tendre, au plus près de ce même pignon de renvoi. Ainsi entraîné en rotation par les deux bnns opposés de la chaîne, ledit pignon de maintien garde une position fixe par rapport au pignon de renvoi, et matéπalise de ce fait un axe de rotation fixe autour duquel le bâti du tendeur peut osciller Ce dernier peut donc trouver une position d'équilibre, maintenu en translation par l'axe dudit pignon de maintien, et maintenu en rotation par l'effort de tension qu'exercent les deux autres pignons ou galets sur la chaîne a tendre. Le tendeur selon l'invention devient ainsi un élément complètement autonome, maintenu en position par l'organe sur lequel il exerce une tension, par l'intermédiaire dudit pignon de maintien. Débarrassé de toute attache avec le bâti de l'installation, le tendeur selon l'invention n'impose plus aucune modification du système de transmission sur lequel il s'adapte
La description qui va suivre, en regard des dessins annexés à titre d'exemple non limitatif, permettra de bien comprendre comment l'invention peut être mise en pratique :According to an advantageous version of the invention specially adapted for transmissions by endless chain, a lever-shaped extension is fitted on the frame of the tensioner, in order to receive at its end a third idler gear pinion called holding pinion. With a diameter greater than one of the return sprockets, said retaining sprocket is inserted between the working bnn and the return bπn of the chain to be stretched, as close as possible to this same return sprocket. Thus driven in rotation by the two opposite bnns of the chain, said retaining pinion keeps a fixed position relative to the return pinion, and therefore matéπalise a fixed axis of rotation around which the frame of the tensioner can oscillate. find an equilibrium position, maintained in translation by the axis of said retaining pinion, and kept in rotation by the tension force exerted by the other two sprockets or rollers on the chain to be stretched. The tensioner according to the invention thus becomes a completely autonomous element, held in position by the member on which it exerts a tension, by means of said retaining pinion. Free of any attachment to the installation frame, the tensioner according to the invention no longer requires any modification of the transmission system on which it adapts The description which follows, with reference to the accompanying drawings by way of nonlimiting example, will make it possible to understand clearly how the invention can be put into practice:
- la figure 1 est une vue générale du tendeur selon l'invention, dans 13 position de rattrapage de "mou" minimum associé à une chaîne de transmission ; - la figure 2 est une vue générale du tendeur selon l'invention, dans la position de rattrapage de "mou" maximum associé à une chaîne de transmission ;- Figure 1 is a general view of the tensioner according to the invention, in 13 minimum "soft" take-up position associated with a transmission chain; - Figure 2 is a general view of the tensioner according to the invention, in the maximum "soft" take-up position associated with a transmission chain;
- la figure 3 est une vue selon la flèche 1 de la figure 1 en coupe partielle, du bras oscillant équipé d'une coulisse élastique selon l'invention, représentée au repos ;- Figure 3 is a view along arrow 1 of Figure 1 in partial section, of the swing arm equipped with an elastic slide according to the invention, shown at rest;
- la figure 4 est une vue générale du tendeur en équilibre selon l'invention, simplement retenu par deux câbles arrimés au bâti de l'installation 15,16- Figure 4 is a general view of the tensioner in equilibrium according to the invention, simply retained by two cables secured to the frame of the installation 15,16
- la figure 5 est une vue générale du tendeur équipé d'un troisième pignon de maintien, représenté en équilibre dans la position de rattrapage de "mou" maximum, associé à une chaîne de transmission ;- Figure 5 is a general view of the tensioner equipped with a third holding pinion, shown in balance in the maximum "soft" take-up position, associated with a transmission chain;
- la figure 6 représente le même dispositif que la figure 5, dans la position de rattrapage de "mou" minimum.- Figure 6 shows the same device as Figure 5, in the minimum "soft" take-up position.
En référence aux figures annexées, le tendeur de chaîne est destiné à être disposé sur un des brins de la chaîne sans fin destiné à la transmission d'effort.Celui-ci est disposé de façon à ce que la face inférieure du brin de retour coopère avec deux des pignons dudit tendeur et que la face supérieure de ce même brin coopère avec le troisième pignon de celui-ci, tel que représenté sur les figures 1 , 2, 4, 5 et 6.With reference to the appended figures, the chain tensioner is intended to be placed on one of the strands of the endless chain intended for force transmission. This is arranged so that the underside of the return strand cooperates with two of the pinions of said tensioner and that the upper face of this same strand cooperates with the third pinion thereof, as shown in FIGS. 1, 2, 4, 5 and 6.
Le tendeur comprend un bâti 4, muni d'un pivot 14 servant à supporter un bras oscillant 9, d'un ressort 10 permettant d'exercer un effort de rotation sur le bras oscillant 9, d'un cliquet de blocage unilatéral 8, d'un ressort 11 permettant d'exercer un effort de rotation sur ce cliquet 8, d'un galet fou 5 destiné, d'une part, à rediriger le brin de la chaîne de transmission sur lequel celui-ci est en appui et, d'autre part, de rendre possible le montage soit non rigide (Fig 4) soit complètement flottant (Fig 5) du tendeur sur l'installation.The tensioner comprises a frame 4, provided with a pivot 14 serving to support a swinging arm 9, a spring 10 making it possible to exert a rotational force on the swinging arm 9, a unilateral locking pawl 8, d 'a spring 11 for exerting a rotational force on this pawl 8, of an idler roller 5 intended, on the one hand, to redirect the strand of the transmission chain on which it is supported and, d 'on the other hand, to make possible the mounting either non-rigid (Fig 4) or completely floating (Fig 5) of the tensioner on the installation.
Le bras oscillant 9 est muni de deux pignons fous 7 et 6 destinés à supporter la chaîne de transmission sur le tendeur, d'un ensemble élastique à une de ses extrémités, selon la figure 3, comprenant une coulisse dentelée 12 et un ressort de compression 13, ce ressort ayant pour but d'admettre un glissement entre la coulisse dentelée 12 et le bras oscillant 9, afin de limiter l'effort de tension maximum appliqué par le tendeur à la chaîne.
The swinging arm 9 is provided with two idler gears 7 and 6 intended to support the transmission chain on the tensioner, with an elastic assembly at one of its ends, according to FIG. 3, comprising a serrated slide 12 and a compression spring 13, this spring having the purpose of admitting a slip between the serrated slide 12 and the oscillating arm 9, in order to limit the maximum tension force applied by the tensioner to the chain.
Claims
REVENDICATIONS
. Tendeur destiné à appliquer directement ou indirectement une force de tension sur un organe, tel qu'une chaîne de transmission ou une courroie (1), comprenant deux pignons ou poulies (6, 7) de renvoi montés rotatifs à chacune des extrémités d'un bras monté oscillant (9) autour d'un pivot (14) solidaire du bâti (4) et aménagé de façon telle que l'un d'eux coopère avec la face inférieure d'un bπn de la courroie ou de la chaîne, tandis que l'autre coopère avec la face supérieure de ce même bnn et d'autre part d'un moyen élastique (10) aménagé de manière à solliciter en rotation le bras oscillant, caractérisé en ce que l'organe à tendre est une chaîne ou une courroie sans fin dont le côté retour est en vis à vis du côté d'entrée, après passage sur un pignon ou une poulie, le côté retour devant également être tendu lors d'un dépassement de charge ou d'un renversement de la direction de déroulement, et en ce qu'il comprend un dispositif rigide de blocage unilatéral (8) permettant l'immobilisation du tendeur lorsque le brin de l'organe sur lequel celui-ci agit se trouve tendu.. Tensioner intended to apply a tension force directly or indirectly on an organ, such as a transmission chain or a belt (1), comprising two idler gears or pulleys (6, 7) rotatably mounted at each end of a arm mounted oscillating (9) around a pivot (14) integral with the frame (4) and arranged so that one of them cooperates with the underside of a bπn of the belt or chain, while that the other cooperates with the upper face of this same bnn and on the other hand with an elastic means (10) arranged so as to urge the oscillating arm in rotation, characterized in that the member to be tensioned is a chain or an endless belt whose return side faces the input side, after passing over a pinion or a pulley, the return side also having to be tensioned when the load is exceeded or the direction is reversed of unwinding, and in that it comprises a rigid block device unilateral age (8) allowing immobilization of the tensioner when the strand of the organ on which it acts is stretched.
2. Tendeur selon la revendication 1 , caractérisé en ce que le bras oscillant ou ledit dispositif rigide de blocage unilatéral est composé d'une partie élastique (13) permettant de limiter la tension maximale appliquée par ledit tendeur sur l'organe à tendre.2. Tensioner according to claim 1, characterized in that the swinging arm or said rigid unilateral locking device is composed of an elastic part (13) making it possible to limit the maximum tension applied by said tensioner on the member to be stretched.
3. Tendeur selon la revendication 1 , caractérisé en ce qu'il comprend un troisième pignon ou une troisième poulie (5), coopérant avec la face inféπeure du brin à tendre, autoπsent ledit tendeur à trouver une position d'équilibre correspondant à l'alignement des bπns d'entrée et de sortie de ce dernier, et ce qu'il n'a pas à être fixé rigidement, mais simplement retenu en position par un lien quelconque avec le bâti de l'installation.3. Tensioner according to claim 1, characterized in that it comprises a third pinion or a third pulley (5), cooperating with the lower face of the strand to be stretched, autoπsent said tensioner to find an equilibrium position corresponding to the alignment of the input and output bπns of the latter, and that it does not have to be rigidly fixed, but simply retained in position by any link with the frame of the installation.
4. Tendeur selon la revendication 1 , restreinte aux transmissions par chaîne, caractérisé en ce qu'il comprend un troisième pignon (5) coopérant avec les deux faces en vis à vis de la chaîne sans fin à tendre, ledit troisième pignon ayant de ce fait une position fixe par rapport aux pignons de renvoi associés à la chaîne et autoπsant le bâti du tendeur à osciller autour de son axe pour trouver une position d'équilibre, et en ce qu'il n'est plus ainsi rattaché qu'exclusivement à l'organe sur lequel il exerce une tension, sans aucun lien avec le bâti de l'installation. 4. Tensioner according to claim 1, restricted to chain drives, characterized in that it comprises a third sprocket (5) cooperating with the two opposite faces of the endless chain to be stretched, said third sprocket having this makes a fixed position with respect to the idler sprockets associated with the chain and autoπsant the frame of the tensioner to oscillate around its axis to find a position of equilibrium, and in that it is no longer thus attached only exclusively to the member on which it exerts a tension, without any link with the frame of the installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/FR1996/001292 WO1998008005A1 (en) | 1996-08-16 | 1996-08-16 | Tension jack with automatic taking up of slack for chain or belt with reversible motion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/FR1996/001292 WO1998008005A1 (en) | 1996-08-16 | 1996-08-16 | Tension jack with automatic taking up of slack for chain or belt with reversible motion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1998008005A1 true WO1998008005A1 (en) | 1998-02-26 |
Family
ID=9488785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR1996/001292 WO1998008005A1 (en) | 1996-08-16 | 1996-08-16 | Tension jack with automatic taking up of slack for chain or belt with reversible motion |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO1998008005A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307235A (en) * | 2013-06-07 | 2013-09-18 | 山东康威通信技术股份有限公司 | Transmission belt tensioning mechanism for travel driving of electric tunnel inspection robot |
| CN105333075A (en) * | 2015-11-23 | 2016-02-17 | 重庆红亿机械有限公司 | Belt tensioning device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3391807A (en) * | 1965-10-22 | 1968-07-09 | Dale Corp Van | Method and apparatus for tensioning a belt |
| DE2118208A1 (en) * | 1971-04-15 | 1972-11-02 | Vereinigte Seidenwebereien AG, 4150Krefeld | Drive tensioner - in chain return path by two idler wheels to give an s course |
| EP0114779A1 (en) * | 1983-01-25 | 1984-08-01 | Caoutchouc Manufacturé et Plastiques Société Anonyme dite: | Belt or chain tightener for transmission |
| FR2730780A1 (en) * | 1995-02-22 | 1996-08-23 | Glasson Alain Raoul Claude | Tensioner for reversible drive chain |
-
1996
- 1996-08-16 WO PCT/FR1996/001292 patent/WO1998008005A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3391807A (en) * | 1965-10-22 | 1968-07-09 | Dale Corp Van | Method and apparatus for tensioning a belt |
| DE2118208A1 (en) * | 1971-04-15 | 1972-11-02 | Vereinigte Seidenwebereien AG, 4150Krefeld | Drive tensioner - in chain return path by two idler wheels to give an s course |
| EP0114779A1 (en) * | 1983-01-25 | 1984-08-01 | Caoutchouc Manufacturé et Plastiques Société Anonyme dite: | Belt or chain tightener for transmission |
| FR2730780A1 (en) * | 1995-02-22 | 1996-08-23 | Glasson Alain Raoul Claude | Tensioner for reversible drive chain |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307235A (en) * | 2013-06-07 | 2013-09-18 | 山东康威通信技术股份有限公司 | Transmission belt tensioning mechanism for travel driving of electric tunnel inspection robot |
| CN105333075A (en) * | 2015-11-23 | 2016-02-17 | 重庆红亿机械有限公司 | Belt tensioning device |
| CN105333075B (en) * | 2015-11-23 | 2017-07-28 | 重庆红亿机械有限公司 | A kind of belt stretcher |
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