EP0074942A1 - Speed reducing mechanism - Google Patents

Speed reducing mechanism

Info

Publication number
EP0074942A1
EP0074942A1 EP81900721A EP81900721A EP0074942A1 EP 0074942 A1 EP0074942 A1 EP 0074942A1 EP 81900721 A EP81900721 A EP 81900721A EP 81900721 A EP81900721 A EP 81900721A EP 0074942 A1 EP0074942 A1 EP 0074942A1
Authority
EP
European Patent Office
Prior art keywords
speed reduction
reduction mechanism
mechanism according
housing
rollers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP81900721A
Other languages
German (de)
French (fr)
Inventor
Bernard Bornand
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tornos Sa Fabrique De Machines Moutier
Original Assignee
Tornos Sa Fabrique De Machines Moutier
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 Tornos Sa Fabrique De Machines Moutier filed Critical Tornos Sa Fabrique De Machines Moutier
Publication of EP0074942A1 publication Critical patent/EP0074942A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
    • F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
    • F16H1/16—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-wheel
    • F16H1/166—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-wheel with members rotating around axes on the worm or worm-wheel
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/36—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/306—Means to synchronise movements
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/34—Rollers; Needles
    • F16C33/36—Rollers; Needles with bearing-surfaces other than cylindrical, e.g. tapered; with grooves in the bearing surfaces
    • F16C33/363—Rollers; Needles with bearing-surfaces other than cylindrical, e.g. tapered; with grooves in the bearing surfaces with grooves in the bearing-surfaces
    • 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
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
    • F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
    • F16H1/16—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-wheel
    • 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
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms
    • F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2247—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with rollers

Definitions

  • the invention relates to a speed reduction mechanism operating as a worm and tangent wheel device, using rolling elements between the screw and the tangent wheel.
  • French patent application 77 13 163 describes such a mechanism using balls, for example, between the screw and the wheel.
  • the invention is described using two ball recirculation systems and it is obviously unthinkable to use geometrical bodies substantially different from the ball to make them recirculate.
  • German patents OS 19 12 653 and Swiss 542 377 present developments of the same idea based on the use of balls. These mechanisms therefore have the same drawbacks as the mechanism according to French patent 77 13 163.
  • these mechanisms offer a reduction ratio depending only on the number of teeth of the wheel and the number of threads, which limits the possibilities in the choice of ratios for a given size.
  • the object of the present invention is to obtain a speed reduction mechanism operating as an endless screw and a tangent wheel whose sliding friction is reduced to rolling friction and does not have the drawbacks and limitations resulting from the use of balls and similar geometric bodies.
  • the solution according to the invention is described in the characterizing part of the claim.
  • the elements used in this solution are rollers provided with threads, meshing with the tangent wheel, these rollers rotating around a shaft in the manner of satellites, the whole being maintained by a housing provided with an access for the tangent wheel.
  • rollers lie in the fact that they allow perfect control of their movements and therefore very high precision can be obtained in the transmission of rotation.
  • we do not use recirculation we can pre-constrain the mechanism and thereby eliminate any play.
  • This range consisting of rational numbers which need not necessarily be whole numbers.
  • Figure 1 shows a section in the housing according to a first example of execution.
  • Figure 2 shows a similar section according to a second embodiment.
  • Figure 3 shows a similar section according to a third embodiment.
  • Figure 4 shows a section along A-A of fig. 2.
  • Figure 5 shows an overview of the mechanism provided with a precharge means.
  • the shaft is designated by 1, the threaded rollers by 2, the threads of the threaded rollers by 3, the tangent wheel by 4, the housing by 5, the groups of guide grooves of the shaft by 6 and 6 ', those of the rollers by 7 and 7 'and those of the housing by 8 and 8'.
  • FIG. 2 there is also a double toothing on the shaft designated by 21 and 21 ', a double toothing on the threaded rollers 22 and 22' and a toothed ring 23 and 23 'inside the housing.
  • This housing 5 is lined with elements designated by 24 respectively 24 ′, 25 designating an annular nut which engages in a thread formed in the Housing 5.
  • FIG. 5 is shown in addition a screw 52 and, a means of connection with the axis of the tangent wheel 4 designated by 52.
  • FIG. 1 will help us understand the mode of operation of the speed reduction mechanism.
  • the rotation which is to be reduced in an established ratio enters the mechanism through the shaft 1.
  • the rotation of the shaft 1 causes that of the threaded rollers 2 which are in contact on the one hand with the shaft 1 and secondly with the limp 5 by the grooves of guides 6,6, 7,7, 8 and 8 *.
  • the housing 5 being fixed, the threaded rollers 2 roll around the shaft 1 at a speed which is a function of the speed of the shaft 1 and of the pitch diameters between the shaft 1 and the rollers and between the threads 3 and the tangent wheel 4.
  • the teeth of the tangent wheel 4 mesh with the threads 3 of the threaded rollers 2 which are out of phase with a value depending on the slope of the teeth of the tangent wheel 4 and the number of threaded rollers 2.
  • a thread 3 of the threaded rollers 2 engages in a tooth of the tangent wheel 4 before the preceding thread leaves the tooth of the tangent wheel 4. In order to obtain this must take into account the width of the tangent wheel.
  • N number of teeth of the tangent wheel 4
  • D pitch diameter of the shaft 1 in contact with the threaded rollers 2
  • the guide grooves 6,6 ', 7,7', 8 and 8 ' are chosen straight, like threads at zero angle. Providing a large number of grooves increases the contact area and therefore reduces the risk of slipping. However, a slip can still occur either due to the resistance offered by the tangent wheel 4, or due to very high speeds.
  • the shaft 1 is provided with teeth 21 and 21 'which mesh with those 22 and 22' of the threaded rollers 2 which in turn mesh with the toothed rings 23 and 23 'of the housing 5.
  • This method again makes it possible to counter any slippage of the threaded rollers 2 and thereby to counteract the disruption of the mechanism.
  • this example includes a set of elements making it possible to exert a preload or preload.
  • the elements 24 and 24 'mounted to slide relative to each other in the housing 5 and keyed, can be compressed by the action of the nut 25.
  • the prestressing system is identical to that of Example 2 respectively in FIG. 2.
  • there is no drive system for the threaded rollers 2 which is not necessary because the grooves guides 6.6 ', 7.7', 8 and 8 'are executed in the form of nets with an effective pitch.
  • These threads are chosen so that the translational movement effect is canceled by passing from one element to another, the slope of the thread 6 being canceled by the opposite slope of the thread 7 of the threaded roller 2 and again by the opposite slope of the thread 8 of the housing 5.
  • This figure illustrates a preload or preload means making it possible to eliminate the inter-axial play of the mechanism.
  • the screw 51 being in its counter-thread in the connecting means 52, and resting on the housing 5 it makes it possible to approach the axes of the mechanism at the point of obtaining a load at the point of entanglement between the threads 3 of threaded rollers 2 and tangent wheel teeth 4.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

Mecanisme reducteur de vitesse fonctionnant comme un dispositif de vis-sans-fin et roue tangente forme par un arbre (1), des rouleaux filetes (2), le tout dans un boitier (5) muni d'une ouverture permettant l'acces de la roue tangente (4) dont les dents engrenent avec des filets (3) dont sont munis les rouleaux filetes (2). Les rouleaux filetes (2) tournent autour de l'arbre (1) des que celui-ci est mis en rotation. Les filets (3) agissent sur les dents inclines ou non de la roue tangente (4) soit par leur propre inclinaison, soit par le decalage des filets (3) en passant d'un rouleau au suivant. Ce mecanisme permet d'obtenir une precision meilleure dans la transmission de la rotation, un travail sans jeu aucun parce qu'il est possible de le precontraindre dans l'axe horizontal et vertical. Dans un meme encombrement il est aussi possible d'obtenir une gamme tres large de rapports de reduction, gamme se composant de nombres rationnels qui ne doivent pas etre necessairement des nombres entiers. Un tel mecanisme peut trouver son utilite dans un grand nombre de cas ou un reducteur vis-sans-fin/roue tangente etait utilise jusqu'alors, particulierement les cas ou une tres grande precision et un haut rendement est demande.Speed reduction mechanism operating as a worm gear and tangent wheel formed by a shaft (1), threaded rollers (2), all in a housing (5) provided with an opening allowing access to the tangent wheel (4) whose teeth mesh with threads (3) with which the threaded rollers (2) are provided. The threaded rollers (2) rotate around the shaft (1) as soon as it is rotated. The threads (3) act on the inclined teeth or not of the tangent wheel (4) either by their own inclination, or by the offset of the threads (3) from one roller to the next. This mechanism makes it possible to obtain better precision in the transmission of the rotation, a work without any play because it is possible to prestress it in the horizontal and vertical axis. In the same footprint it is also possible to obtain a very wide range of reduction ratios, a range consisting of rational numbers which need not necessarily be whole numbers. Such a mechanism can find its usefulness in a large number of cases where a worm-gear reducer / tangent wheel has been used until then, particularly the cases where very high precision and high efficiency is required.

Description

Mécanisme réducteur de vitesse Speed reduction mechanism
Domaine techniqueTechnical area
L'invention concerne un mécanisme réducteur de vitesse fonctionnant comme un dispositif de vis-sans-fin et roue tangente, utilisant des éléments roulants entre la vis et la roue tangente.The invention relates to a speed reduction mechanism operating as a worm and tangent wheel device, using rolling elements between the screw and the tangent wheel.
Technique antérieurePrior art
La demande de brevet française 77 13 163 décrit un tel mécanisme utilisant comme intermédiaire entre la vis et la roue, par exemple, des billes. L'invention est décrite à l'aide de deux systèmes de recirculation de billes et il est évide- ment impensable d'utiliser des corps géométriques sensiblement différents de la bille pour les faire recirculer.French patent application 77 13 163 describes such a mechanism using balls, for example, between the screw and the wheel. The invention is described using two ball recirculation systems and it is obviously unthinkable to use geometrical bodies substantially different from the ball to make them recirculate.
II est possible à l'aide de la solution apportée par la demande de brevet française 77 13 163, de réduire une part importante des frottements entre la vis et la roue tangente a des frottements de roulement. Il n'est par contre pas possible de supprimer les frottements de glissements résul- tants du fait que les billes sont en contact étroit entre elles là où leur surface présente un sens de déplacement contraire. Ce contact est inévitable afin de garantir la recirculation. D'autre part, la bille est un corps géométrique difficile à contrôler dans ces mouvements.It is possible, using the solution provided by French patent application 77 13 163, to reduce a large part of the friction between the screw and the wheel tangent to rolling friction. On the other hand, it is not possible to eliminate the friction resulting from the fact that the balls are in close contact with one another where their surface has a contrary direction of movement. This contact is inevitable in order to guarantee recirculation. On the other hand, the ball is a geometric body difficult to control in these movements.
Les brevets allemand OS 19 12 653 et suisse 542 377 présentent des développements de la même idée se basant sur l'utilisation de billes. Ces mécanismes ont par conséquent les mêmes inconvénients que le mécanisme selon le brevet français 77 13 163. D'autre part, au même titre que le couple vis-sans-fin et roue tangente classique, ces mécanismes offrent un rapport de réduction ne dépendant que du nombre de dents de la roue et du nombre de filets, ce qui limite les possibilités dans le choix des rapports pour un encombrement donné.The German patents OS 19 12 653 and Swiss 542 377 present developments of the same idea based on the use of balls. These mechanisms therefore have the same drawbacks as the mechanism according to French patent 77 13 163. On the other hand, in the same way as the worm-gear and conventional tangent wheel couple, these mechanisms offer a reduction ratio depending only on the number of teeth of the wheel and the number of threads, which limits the possibilities in the choice of ratios for a given size.
Le but de la présente invention est d'obtenir un mécanisme réducteur de vitesse fonctionnant comme vis-sans-fin et roue tangente dont le frottement de glissement est réduit à un frottement de roulement et ne présentant pas les inconvénients et les limitations résultant de l'utilisation de billes et corps géométriques semblables.The object of the present invention is to obtain a speed reduction mechanism operating as an endless screw and a tangent wheel whose sliding friction is reduced to rolling friction and does not have the drawbacks and limitations resulting from the use of balls and similar geometric bodies.
Exposé de l'inventionStatement of the invention
La solution selon l'invention est décrite dans la partie caractérisante de la revendication. Les éléments utilisés dans cette solution sont des rouleaux pourvus de filets, engrenants avec la roue tangente, ces rouleaux tournant autour d'un arbre à la manière de satellites, le tout étant maintenu par un boîtier pourvu d'un accès pour la roue tangente.The solution according to the invention is described in the characterizing part of the claim. The elements used in this solution are rollers provided with threads, meshing with the tangent wheel, these rollers rotating around a shaft in the manner of satellites, the whole being maintained by a housing provided with an access for the tangent wheel.
L'avantage d'utiliser des rouleaux réside dans le fait qu' ils permettent le contrôle parfait de leurs mouvements et de ce fait une très grande précision peut être obtenue dans la transmission de la rotation. D'autre part, vu que l'on n'utilise pas de recirculation, l'on peut pré-contraindre le mécanisme et de ce fait éliminer tout jeu. Dans un encombrement donné il est aussi possible d'obtenir une gamme étendue de rapports de réduction. Cette gamme se composant de nombres rationnels qui ne doivent pas être nécessairement des nombres entiers.The advantage of using rollers lies in the fact that they allow perfect control of their movements and therefore very high precision can be obtained in the transmission of rotation. On the other hand, since we do not use recirculation, we can pre-constrain the mechanism and thereby eliminate any play. In a given size it is also possible to obtain a wide range of ratios reduction. This range consisting of rational numbers which need not necessarily be whole numbers.
Description sommaire des dessinsBrief description of the drawings
L'invention sera mieux comprise à l'aide des dessins joints dans lesquels :The invention will be better understood using the accompanying drawings in which:
La figure 1 montre une coupe dans le boîtier selon un premier exemple d'exécution.Figure 1 shows a section in the housing according to a first example of execution.
La figure 2 montre une coupe semblable selon un deuxième exemple d'exécution.Figure 2 shows a similar section according to a second embodiment.
La figure 3 montre une coupe semblable selon un troisième exemple d'exécution.Figure 3 shows a similar section according to a third embodiment.
La figure 4 montre une coupe selon A-A de la fig. 2.Figure 4 shows a section along A-A of fig. 2.
La figure 5 montre une vue d'ensemble du mécanisme muni d'un moyen de précharge.Figure 5 shows an overview of the mechanism provided with a precharge means.
Lorsque les éléments suivants sont représentés dans une des figures ils sont toujours représentés par le même numéro de référence. Ainsi l'arbre est désigné par 1, les rouleaux filetés par 2, les filets des rouleaux filetés par 3, la roue tangente par 4 , le boîtier par 5, les groupes de gorges de guidages de 1 ' arbre par 6 et 6', ceux des rouleaux par 7 et 7 ' et ceux du boîtier par 8 et 8'.When the following elements are represented in one of the figures, they are always represented by the same reference number. Thus the shaft is designated by 1, the threaded rollers by 2, the threads of the threaded rollers by 3, the tangent wheel by 4, the housing by 5, the groups of guide grooves of the shaft by 6 and 6 ', those of the rollers by 7 and 7 'and those of the housing by 8 and 8'.
Dans la figure 1 il y a en plus deux disques à alésages désignés par 11 et 11'.In Figure 1 there are in addition two discs with bores designated by 11 and 11 '.
Dans la figure 2 il y a en plus une denture double sur l'arbre désigné par 21 et 21', une denture double sur les rouleaux filetés 22 et 22' et une couronne dentée 23 et 23 ' à l'intérieur du boîtier. Ce boîtier 5 est doublé d'éléments désignës par 24 respectivement 24', 25 désignant un écrou annulaire qui s'engage dans un filet pratiqué dans le Boîtier 5.In FIG. 2 there is also a double toothing on the shaft designated by 21 and 21 ', a double toothing on the threaded rollers 22 and 22' and a toothed ring 23 and 23 'inside the housing. This housing 5 is lined with elements designated by 24 respectively 24 ′, 25 designating an annular nut which engages in a thread formed in the Housing 5.
Dans la figure 3 l'on retrouve les éléments doublant le boîtier, ici désignés par 34 et 34', ainsi que l'écrou, ici désigné par 35 .In Figure 3 we find the elements lining the housing, here designated by 34 and 34 ', as well as the nut, here designated by 35.
Dans la figure 4 l'on ne trouve que des éléments figurant dans la figure 2.In figure 4 we only find elements appearing in figure 2.
Dans la figure 5 est représenté en plus une vis 52 et, un moyen de liaison avec l'axe de la roue tangente 4 désigné par 52.In FIG. 5 is shown in addition a screw 52 and, a means of connection with the axis of the tangent wheel 4 designated by 52.
Meilleure manière de réaliser l'inventionBest way to realize the invention
Exemple 1Example 1
La figure 1 nous aidera à comprendre le mode de fonctionnelsment du mécanisme réducteur de vitesse. La rotation qui est à réduire dans un rapport établi, entre dans le mécanisme par l'arbre 1. La rotation de l'arbre 1 entraîne celle des rouleaux filetés 2 qui sont en contact d'une part avec l'arbre 1 et d'autre part avec le boiter 5 par les gorges de guidages 6,6,,7,7,,8 et 8*. Le boîtier 5 étant fixe, les rouleaux filetés 2 roulent autour de l'arbre 1 à une vitesse qui est fonction de la vitesse de l'arbre 1 et des diamètres primitifs entre l'arbre 1 et les rouleaux et entre les filets 3 et la roue tangente 4. Les dents de la roue tangente 4 engrènent avec les filets 3 des rouleaux filetés 2 qui sont déphasés d'une valeur dépendant de la pente des dents de la roue tangente 4 et du nombre de rouleaux filetés 2. Afin d'obtenir un mouvement continu de la roue tangente 4 il est nécessaire qu'un filet 3 des rouleaux filetés 2 s'engage dans une dent de la roue tangente 4 avant que le-précédant filet quitte la dent de la roue tangente 4. Afin d'obtenir cela il faut tenir compte de la largeur de la roue tangente.Figure 1 will help us understand the mode of operation of the speed reduction mechanism. The rotation which is to be reduced in an established ratio, enters the mechanism through the shaft 1. The rotation of the shaft 1 causes that of the threaded rollers 2 which are in contact on the one hand with the shaft 1 and secondly with the limp 5 by the grooves of guides 6,6, 7,7, 8 and 8 *. The housing 5 being fixed, the threaded rollers 2 roll around the shaft 1 at a speed which is a function of the speed of the shaft 1 and of the pitch diameters between the shaft 1 and the rollers and between the threads 3 and the tangent wheel 4. The teeth of the tangent wheel 4 mesh with the threads 3 of the threaded rollers 2 which are out of phase with a value depending on the slope of the teeth of the tangent wheel 4 and the number of threaded rollers 2. In order to obtain a continuous movement of the tangent wheel 4 it is necessary that a thread 3 of the threaded rollers 2 engages in a tooth of the tangent wheel 4 before the preceding thread leaves the tooth of the tangent wheel 4. In order to obtain this must take into account the width of the tangent wheel.
Le rapport de réduction du mécanisme, compris comme étant le nombre de tours de l'arbre 1 nécessaire pour faire effectuer un tour complet à la roue tangente 4 est donné par la relationThe reduction ratio of the mechanism, understood as being the number of turns of the shaft 1 necessary to make the tangent wheel 4 make a full turn is given by the relationship
5 où N = nombre de dents de la roue tangente 4 5 where N = number of teeth of the tangent wheel 4
D = diamètre primitif de l'arbre 1 en contact avec les rouleaux filetés 2 d = diamètre primitif des• rouleaux 2 à 1 'endroit du contact avec le boîtier 5 = inverse du nombre entier où n est le nombre des rouleaux filetés 2 et p le nombre de rouleaux qui entrent en contact avec la même dent de la roue tangente 4.D = pitch diameter of the shaft 1 in contact with the threaded rollers 2 d = pitch diameter of the • rollers 2 at the point of contact with the housing 5 = inverse of the whole number where n is the number of threaded rollers 2 and p the number of rollers that come into contact with the same tooth of the tangent wheel 4.
Dans cet exemple, les gorges de guidages 6,6',7,7',8 et 8' sont choisis droit, tel des filets à angle nul. Le fait de prévoir un grand nombre de gorges augmente la surface de contact et de ce fait réduit le risque de glissements. Toutefois, un glissement peut toujours se produire soit du fait de la résistance offerte par la roue tangente 4, soit du fait de très hautes vitesses. Afin de parer au dérèglement du mécanisme il est prévu dans cet exemple de prévoir aux extrémités des rouleaux filetés 2 des pivots qui tourillonnent dans des alésages satellites pratiqués dans les disques 11 et 11' qui eux tournent fous autour de l'arbre 1.In this example, the guide grooves 6,6 ', 7,7', 8 and 8 'are chosen straight, like threads at zero angle. Providing a large number of grooves increases the contact area and therefore reduces the risk of slipping. However, a slip can still occur either due to the resistance offered by the tangent wheel 4, or due to very high speeds. In order to counteract the disruption of the mechanism, it is provided in this example to provide pivots at the ends of the threaded rollers 2 which rotate in satellite bores made in the discs 11 and 11 'which in turn rotate madly around the shaft 1.
Exemple 2Example 2
Dans le cas illustré en figure 2, l'arbre 1 est pourvu de dentures 21 et 21' qui engrènent avec celles 22 et 22' des rouleaux filetés 2 qui à leur tour engrènent avec les couronnes dentées 23 et 23' du boîtier 5. Ce procédé permet à nouveau dé parer â tout glissement des rouleaux filetés 2 et de ce fait de parer au dérèglement du mécanisme. Du fait que tout jeu a une influence défavorable sur la précision des mouvements transmis par le mécanisme, cet exemple comporte un ensemble d'éléments permettant d'exercer une précontrainte ou précharge. Les éléments 24 et 24' montés coulissants l'un par rapport à l'autre dans le boîtier 5 et clavetés, peuvent être comprimés par l'action de l'écrou 25. Dans ce but il y a lieu de prévoir une atrophie des gorges de guidages 7 et 7' des rouleaux filetés 2 qui sont alors à prévoir en un nombre pair. L'atrophie des gorges de guidage 7 doit de préférence se faire en alternance avec celle des gorges de guidage 7'.In the case illustrated in Figure 2, the shaft 1 is provided with teeth 21 and 21 'which mesh with those 22 and 22' of the threaded rollers 2 which in turn mesh with the toothed rings 23 and 23 'of the housing 5. This method again makes it possible to counter any slippage of the threaded rollers 2 and thereby to counteract the disruption of the mechanism. Because any play has an unfavorable influence on the precision of the movements transmitted by the mechanism, this example includes a set of elements making it possible to exert a preload or preload. The elements 24 and 24 'mounted to slide relative to each other in the housing 5 and keyed, can be compressed by the action of the nut 25. For this purpose it is necessary to provide for an atrophy of the grooves guides 7 and 7 'of the threaded rollers 2 which are then to be provided in an even number. The atrophy of the guide grooves 7 should preferably be alternated with that of the guide grooves 7 '.
Exemple 3Example 3
Le système de précontrainte est identique à celui de l'exemple 2 respectivement de la figure 2. Dans cet exemple par contre il n'y a pas de système d'entraînement des rouleaux filetés 2 qui n'est pas nécessaire du fait que les gorges de guidages 6,6',7,7',8 et 8' sont exécutés en forme de filets avec un pas effectif. Ces filets sont choisis de manière à ce que l'effet de mouvement de translation soit annulé en passant d'un élément à l'autre, la pente du filet 6 étant annulé par la pente contraire du filet 7 du rouleau fileté 2 et à nouveau par la pente contraire du filet 8 du boîtier 5. Du fait que, d'autre part, sur chaque élément les filets 6, 7 et 8 ont une pente contraire à celle des filets 6', 7' et 8', il en résulte une contrainte telle qu'aucun glissement ne peut se produire entre l'arbre 1 et les rouleaux 2 respectivement entre les rouleaux 2 et le boîtier 5.The prestressing system is identical to that of Example 2 respectively in FIG. 2. In this example, on the other hand, there is no drive system for the threaded rollers 2 which is not necessary because the grooves guides 6.6 ', 7.7', 8 and 8 'are executed in the form of nets with an effective pitch. These threads are chosen so that the translational movement effect is canceled by passing from one element to another, the slope of the thread 6 being canceled by the opposite slope of the thread 7 of the threaded roller 2 and again by the opposite slope of the thread 8 of the housing 5. Because, on the other hand, on each element the threads 6, 7 and 8 have a slope opposite to that of the threads 6 ', 7' and 8 ', this results a stress such that no sliding can occur between the shaft 1 and the rollers 2 respectively between the rollers 2 and the housing 5.
D'autre part, en lieu et place de faire avancer la roue tangente 4 par le jeu de déphasage des filets 3 des rouleaux 2, l'on a choisi ici de prévoir les filets 3 avec un pas effectif. L'avantage consisté à pouvoir exécuter tous les rouleaux de là même manière. Exemple 4On the other hand, instead of advancing the tangent wheel 4 by the phase shift of the threads 3 of the rollers 2, we have chosen here to provide the threads 3 with an effective pitch. The advantage is that you can run all the rollers in the same way. Example 4
Cet exemple n'est pas représenté par un dessin. Il utilise les mêmes éléments que les exemples précédants, mais les rouleaux filetés comportent des gorges de guidages en forme de filet. Ces filets ont pour effet un déplacement axial de ces rouleaux pendant la rotation ce qui néssécite un recyclage à chaque tour. Ce recyclage est obtenu par un évidement dans le boîtier 5 dans lequel les rouleaux sont dégagés des gorges de guidage de l'a'bre 1 et du boîtier 5. Dans cette position une came agit sur les rouleaux et ceuxci se retrouvent dans la position de départ et peuvent recommencer une rotation.This example is not represented by a drawing. It uses the same elements as the previous examples, but the threaded rollers have thread-shaped guide grooves. These threads have the effect of an axial displacement of these rollers during rotation, which necessitates recycling at each turn. This recycling is obtained by a recess in the housing 5 in which the rollers are released from the guide grooves of the shaft 1 and of the housing 5. In this position a cam acts on the rollers and these are found in the position of start and can start a rotation again.
Figure 5Figure 5
Cette figure illustre un moyen de précharge ou de précontrainte permettant d'éliminer le jeu entre-axial du mécanisme. La vis 51 étant dans son contre-filet dans le moyen de liaison 52, et s'appuyant sur le boîtier 5 elle permet d' approcher les axes du mécanisme au point d'obtenir une charge au point d'engrênement entre les filets 3 des roulleaux filetés 2 et des dents de la roue tangente 4. This figure illustrates a preload or preload means making it possible to eliminate the inter-axial play of the mechanism. The screw 51 being in its counter-thread in the connecting means 52, and resting on the housing 5 it makes it possible to approach the axes of the mechanism at the point of obtaining a load at the point of entanglement between the threads 3 of threaded rollers 2 and tangent wheel teeth 4.

Claims

R E V E N D I C A T I O N SR E V E N D I C A T I O N S
1)1)
Mécanisme réducteur de vitesse fonctionnant comme un dispositif de vis-sans-fin et roue tangente, utilisant des éléments roulants au point de contact de la vis avec les dents de la roue tangente, c a r a c t é r i s é en ce que les éléments roulants sont des rouleaux filetés 2, roulant autour d'un arbre 1 et maintenus par un boîtier fileté 5 qui lui est pourvu d'un accès, permettant à la roue tangente 4 d'engrener avec les filets 3 des rouleaux filetés 2.Speed reduction mechanism functioning as a worm-gear and tangent wheel device, using rolling elements at the point of contact of the screw with the teeth of the tangent wheel, characterized in that the rolling elements are rollers threaded 2, rolling around a shaft 1 and held by a threaded housing 5 which is provided with an access, allowing the tangent wheel 4 to mesh with the threads 3 of the threaded rollers 2.
2)2)
Mécanisme réducteur de vitesse selon la revendication 1, c a r a c t é r i s é par le fait que les filets 3 des rouleaux filetés 2 sont à angle nul et sont déphasés d'un rouleau à l'autre.Speed reduction mechanism according to claim 1, which is due to the fact that the threads 3 of the threaded rollers 2 are at zero angle and are out of phase from one roll to another.
3)3)
Mécanisme réducteur de vitesse selon la revendication 1, c a r a c t.ê r i s ê par le fait que les filets 3 des rouleaux filetés 2 ont un angle supérieur à zéro degré.Speed reduction mechanism according to claim 1, c a r a c t.ê r i s ê in that the threads 3 of the threaded rollers 2 have an angle greater than zero degrees.
Mécanisme réducteur de vitesse selon les revendications 1 et 3, c a r a c t é r i s é par le fait que les filets 3 des rouleaux filetés 2 ont un angle supérieur à zéro degré et que ces filets 3 sont déphasés d'un rouleau à l'autre.Speed reduction mechanism according to claims 1 and 3, c a r a ct e r i s ed in that the threads 3 of the threaded rollers 2 have an angle greater than zero degrees and that these threads 3 are out of phase from one roller to another.
5)5)
Mécanisme réducteur de vitesse selon la revendication 1, c a r a c t é r i s é par le fait que l'arbre 1, les rouleaux filetés 2 et lé boîtier 5 comportent des gorges de guidages homologues 6,6',7,7',8 et 8', symmëtriquement disposées en deux groupes sur chaque élément. 6)Speed reduction mechanism according to claim 1, characterized in that the shaft 1, the threaded rollers 2 and the housing 5 have homologous guide grooves 6,6 ', 7,7', 8 and 8 ' , symmetrically arranged in two groups on each element. 6)
Mécanisme réducteur de vitesse selon les revendications 1 et 5, c a r a c t é r i s é par le fait que l'arbre 1, les rouleaux filetés 2 et le boîtier 5 comportent des gorges de guidages 6,6',7,7',8 et 8', sous, la forme de filets dont l'angle est inversé en passant d'un élément à l'autre et dont l'angle est inversé d'un groupe symmëtrique à l'autre sur le même élément.Speed reduction mechanism according to claims 1 and 5, characterized in that the shaft 1, the threaded rollers 2 and the housing 5 have guide grooves 6,6 ', 7,7', 8 and 8 ', under, the form of nets whose angle is inverted passing from one element to another and whose angle is inverted from one symmetrical group to another on the same element.
7)7)
Mécanisme réducteur de vitesse selon les revendications 1 5 et 6, c a r a c t é r i s é par le fait que les gorges de guidages 6,6',7,7',8 et 8' sont usinées avec un pas plus grand en passant d 'une gorge à 1 ' autre .Speed reduction mechanism according to claims 1 5 and 6, characterized in that the guide grooves 6,6 ', 7,7', 8 and 8 'are machined with a larger pitch from one throat to another.
8)8)
Mécanisme réducteur de vitesse selon les revendications 1 5,6 et 7, c a r a c t é r i s é par le fait que le profil des gorges de guidages 6,6',7,7',8 et 8' est atrophié.Speed reduction mechanism according to claims 1 5,6 and 7, c a r a ct e r i s ed by the fact that the profile of the guide grooves 6,6 ', 7,7', 8 and 8 'is atrophied.
9)9)
Mécanisme réducteur de vitesse selon la revendication 1, c a r a c t é r i s é par le fait que des dentures 21, 22 et 23 sont taillées sur l'arbre 1, sur les rouleaux filetés 2 et, sous la forme d'une couronne, dans le boîtier 5:Speed reduction mechanism according to claim 1, characterized in that teeth 21, 22 and 23 are cut on the shaft 1, on the threaded rollers 2 and, in the form of a crown, in the housing 5:
10)10)
Mécanisme réducteur de vitesse selon les revendications 1 et 9, c a r a c t é r i s é par le fait que les dentures 21, 22 et 23 sont rapportées sur l'arbre 1 et le boîtier 5.Speed reduction mechanism according to claims 1 and 9, which is due to the fact that the teeth 21, 22 and 23 are attached to the shaft 1 and the housing 5.
11)11)
Mécanisme réducteur de vitesse selon la revendication 1, c a r a c t é r i s é par le fait que deux disques 11 et 11', agencés fous autour de l'arbre 1, guident les rouleaux filetés 2 qui tourillonnent dans des alésages satellites de ces disques 11 et 11' .Speed reduction mechanism according to claim 1, characterized in that two discs 11 and 11 ', arranged idly around the shaft 1, guide the rollers threaded 2 which revolve in satellite bores of these discs 11 and 11 '.
12) Mécanisme réducteur de vitesse selon la revendication 1, c ar ac té r i s é par le fait que le boîtier 5 pourvu d'un accès comporte deux parties clavetées 24 et 24', coulissantes l'unspar rapport à l'autre et qu'il est pourvu de moyens de serrage 25 qui maintiennent en position les deux parties et exercent une charge horizontale.12) Speed reduction mechanism according to claim 1, c ar ac ted ized by the fact that the housing 5 provided with an access comprises two keyed parts 24 and 24 ', sliding relative to each other and that it is provided with clamping means 25 which hold the two parts in position and exert a horizontal load.
13)13)
Mécanisme réducteur de vitesse selon la revendication 1, c ar ac té r i s é par le fait que des moyens de serrage 51 sont fixés à l'extérieur du boîtier 5 de manière à excer- cer une charge verticale contraignant le boîter 5 vers l'axe de la roue tangente 4.Speed reduction mechanism according to claim 1, charac terized by the fact that clamping means 51 are fixed outside the housing 5 so as to exert a vertical load constraining the housing 5 towards the axis of the tangent wheel 4.
14) Mécanisme réducteur de vitesse selon les revendications 1 et 5, c a r a c té r i s é par le fait que les diamètres primitifs des rouleaux 2 sont différents sur les parties pourvues des filets 3 et sur les parties et sur les parties pourvues de gorges de guidages 7 et 7'.14) Speed reduction mechanism according to claims 1 and 5, charac terized by the fact that the pitch diameters of the rollers 2 are different on the parts provided with the threads 3 and on the parts and on the parts provided with guide grooves 7 and 7 '.
15)15)
Mécanisme réducteur de vitesse selon les revendications 1 et 5, c a r a c t é r is é par le fait que l'arbre 1, les rouleaux filetés 2 et le boîtier 5 comportent des gorges de guidages 6,6',7,7',8 et 8' sous la forme de filets, le boîtier 5 étant pourvu d'un évidement dégageant après chaque tour les rouleaux filetés 2, et d'au moins une came agissant dans l'évidement axialement sur les rouleaux filetés 2 de manière à les recycler. Speed reduction mechanism according to claims 1 and 5, characterized in that the shaft 1, the threaded rollers 2 and the housing 5 have guide grooves 6,6 ', 7,7', 8 and 8 'in the form of threads, the housing 5 being provided with a recess releasing after each turn the threaded rollers 2, and at least one cam acting in the recess axially on the threaded rollers 2 so as to recycle them.
EP81900721A 1981-03-27 1981-03-27 Speed reducing mechanism Withdrawn EP0074942A1 (en)

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PCT/CH1981/000036 WO1982003435A1 (en) 1981-03-27 1981-03-27 Speed reducing mechanism

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EP0074942A1 true EP0074942A1 (en) 1983-03-30

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CN105972062B (en) * 2016-05-06 2019-01-15 昆山万禾精密电子有限公司 The assemble method and biaxial hinge of biaxial hinge
CN105972061B (en) * 2016-05-06 2019-07-12 昆山万禾精密电子有限公司 The assemble method and double-axis hinge of double-axis hinge
FR3074549B1 (en) * 2017-12-04 2021-07-16 Jerome Dubus CHEVRONS ROLLER BEARING
KR20210102783A (en) * 2020-02-12 2021-08-20 주식회사 만도 Steer-by-wire type steering apparatus

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FR888281A (en) * 1942-02-27 1943-12-08 Roller bearing for helical or circular motion
DE1450835A1 (en) * 1964-08-10 1969-02-06 Siemens Ag Helical gear
FR1494173A (en) * 1966-07-20 1967-09-08 Dba Sa Development of screw-nut roller systems
US3468179A (en) * 1968-03-26 1969-09-23 Kearney & Trecker Corp Recirculating ball worm drive
NL6918719A (en) * 1968-12-13 1970-06-16
DE1916562A1 (en) * 1969-04-01 1970-10-15 Helmut Koerner Roller screw gear
DE1962937A1 (en) * 1969-12-16 1971-06-24 Georg Titt Coaxial roller worm gear
DE2008257A1 (en) * 1970-02-23 1971-09-02 Koerner H Roller screw gears
SE346367B (en) * 1970-10-14 1972-07-03 Skf Ind Trading & Dev
FR2389803A1 (en) * 1977-05-02 1978-12-01 Luc Jacques Rapid worm gear reducer - has balls circulating in groove of drive shaft and engaging in grooves around gear wheel rim

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