EP2313812B1 - Movement for a timepiece with an integrated automatic winding device - Google Patents

Movement for a timepiece with an integrated automatic winding device Download PDF

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Publication number
EP2313812B1
EP2313812B1 EP09777297A EP09777297A EP2313812B1 EP 2313812 B1 EP2313812 B1 EP 2313812B1 EP 09777297 A EP09777297 A EP 09777297A EP 09777297 A EP09777297 A EP 09777297A EP 2313812 B1 EP2313812 B1 EP 2313812B1
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EP
European Patent Office
Prior art keywords
wheel
movement
accordance
barrel
rotation
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EP09777297A
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German (de)
French (fr)
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EP2313812A1 (en
Inventor
Enrico Barbasini
Michel Navas
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Fabrique du Temps SA
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Fabrique du Temps SA
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Publication of EP2313812A1 publication Critical patent/EP2313812A1/en
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B5/00—Automatic winding up
    • G04B5/02—Automatic winding up by self-winding caused by the movement of the watch
    • G04B5/16—Construction of the weights
    • G04B5/165—Weights consisting of several parts
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B5/00—Automatic winding up
    • G04B5/02—Automatic winding up by self-winding caused by the movement of the watch

Definitions

  • the present invention relates to a self-winding timepiece movement comprising a frame carrying a source of mechanical energy, a rotating oscillating mass in reference to the frame along a first axis of rotation and a gear reduction gear arranged to recharge the source of mechanical energy from the movements of the oscillating mass.
  • the oscillating mass is generally integral with a segment or a ring provided with an internal toothing arranged in engagement with a first wheel of the gear reducer.
  • the patent CH 286 915 describes an example of such a movement, wherein the oscillating mass has the form of a ring provided with an unbalance and is mounted on the periphery of the movement by means of rollers.
  • the document FR 2,146,509 discloses a movement in which the oscillating weight carries a ratchet for transmission to the gear reducer.
  • the present invention defined by claim 1, has the main purpose of proposing an alternative to known automatic winding mechanisms, aimed in particular to simplify the structure and assembly.
  • the subject of the present invention is a movement for a timepiece of the type mentioned above, characterized in that the gear train comprises at least one first wheel arranged on the oscillating mass so as to be able to freely rotate relative to to the latter, along a second axis of rotation (X2) substantially parallel to the first axis of rotation (X1).
  • the gear wheel includes a second wheel coaxial with the first wheel and integral in rotation thereof, the first wheel being arranged in engagement with a fixed wheel secured to the frame while the second wheel has a kinematic connection with a third wheel. wheel of the gear reducer whose rotation is likely to cause the charge of the source of mechanical energy.
  • the ratio between, on the one hand, the gear ratio between the first wheel and the fixed wheel, and on the other hand, the gear ratio between the second wheel and the third wheel. wheel is different from 1.
  • an automatic winding mechanism is obtained, part of which is embedded, that is to say carried directly by the oscillating mass.
  • the oscillating mass is removed from the movement, the latter is directly accessible because the bridges are not encumbered by the components of the gear reducer, as is generally the case with - movements of the state of the art.
  • the fixed wheel and the third wheel are coaxial with the oscillating mass being disposed on either side of the latter.
  • the barrel shaft can advantageously be arranged to be coaxial with the oscillating mass, either in a central position with reference to the movement, or in an off-center position.
  • the present invention also relates to a timepiece comprising a movement of the type which has just been described.
  • FIG. 1 is an exploded perspective view of a portion of a watch movement having an automatic winding mechanism according to a preferred embodiment of the present invention
  • the figure 2 represents a sectional view of the elements represented on the figure 1 , when assembled, and
  • the figure 3 represents a perspective view of the elements represented on the figure 1 , when assembled.
  • FIGS. 1 to 3 show in a simplified manner, by way of nonlimiting illustration, the only elements of a watch movement, according to a preferred embodiment of the present invention, which are necessary for the understanding of the latter.
  • the figure 1 represent all of these elements in an exploded view in perspective.
  • the watch movement comprises a source of mechanical energy, illustrated here in the form of a mainspring (visible only on the figure 2 ) housed in a barrel 1 and a first end (not visible) is integral with a barrel shaft 2 while its second end (not visible) is integral with a barrel drum 3.
  • a source of mechanical energy illustrated here in the form of a mainspring (visible only on the figure 2 ) housed in a barrel 1 and a first end (not visible) is integral with a barrel shaft 2 while its second end (not visible) is integral with a barrel drum 3.
  • the barrel 1 is rotatably mounted relative to the frame of the watch movement, its shaft 2 being pivoted, on either side of the drum 3, in a first and a second element 4, 5 of the frame, which may be barrel bridges. for example.
  • a first and a second element 4, 5 of the frame which may be barrel bridges. for example.
  • One of these frame elements could alternatively be the platinum of the movement.
  • the watch movement comprises an automatic winding mechanism, here of the unidirectional type, comprising in particular an oscillating mass 8 rotatably mounted with reference to the frame of the movement by means of a ball bearing 10.
  • the ball bearing comprises a hub 11 secured to the barrel shaft, as will be more clearly apparent from the detailed description which will be exposed in connection with the figure 2 , and an outer ring 12, integral with the oscillating mass.
  • the oscillating mass has a first axis of rotation X1 which coincides with the axis of rotation of the barrel shaft 2.
  • the oscillating mass carries a satellite, of axis of rotation X2, comprising a first gear 14 located under the board of the oscillating mass on the representation of the figure 1 and a second gear 15 located on the other side of the board of the oscillating mass.
  • the two wheels 14, 15 are connected to each other by means of a screw 16 disposed in a hole adapted to the board of the oscillating mass.
  • the two wheels 14 and 15 are integral with each other in rotation.
  • the first wheel 14 is arranged to roll on the toothing of a fixed wheel 18, integral with the first frame member 4, when the oscillating mass rotates along its axis X1.
  • the fixed wheel 18 is coaxial with the oscillating mass 8.
  • the second wheel 15 is arranged to mesh with a third wheel 20, also intended to be assembled to the movement so as to pivot along the first axis of rotation X1.
  • the third wheel 20 has the shape of a ring whose inner periphery comprises a toothing 22 designed to cooperate with a device
  • the latter is composed here of an elastic ring comprising two teeth 24 diametrically opposed and each having a shape such that a rotation of the third wheel 20 in a first direction (anti-clockwise on the figure 1 ) does not cause the ring to rotate, because of a sliding of the toothing 22 on the teeth 24, while a rotation of the third wheel 20 in the second direction of rotation causes a rotation of the ring in the same direction (clockwise on the figure 1 ).
  • the ratchet device 23 is intended to be secured to a drive member 26 of the barrel shaft by means of screws not shown.
  • the drive member 26 has a generally disk-like shape in which a square central hole 27 has been provided to cooperate in rotation with a first end 28 of the barrel shaft.
  • a screw 30 makes it possible to make the driving element 26 and the hub 11 of the ball bearing integral with the barrel shaft 2, as is more clearly apparent from the figure 2 .
  • a barrel ratchet 32 is provided to cooperate with the second free end (numeral 33 on the figure 2 ) of the barrel shaft. More specifically, the barrel ratchet is integral with the barrel shaft, here by means of a screw 35, and has a kinematic connection with a conventional winding mechanism (not shown).
  • a pawl 36 is also arranged, in known manner, to act on the toothing of the barrel ratchet and prevent it from rotating counterclockwise on the ratchet. figure 1 .
  • the figures 2 and 3 represent the components of the figure 1 when they are assembled in views, respectively, in section and in perspective.
  • the automatic winding mechanism according to the present invention constitutes a stack of components on the first free end 28 of the barrel shaft 2, which is very favorable from the point of view of the bulk with reference to the mechanisms of the prior art:
  • the barrel shaft 2 pivots in a stone 37 carried by the fixed wheel 18, itself secured to the first frame member 4.
  • the barrel shaft 2 extends beyond beyond this frame member to carry the ball bearing 10, arranged in abutment against an annular shoulder 38 of the barrel shaft 2 and on which the driving element 26 rests.
  • the ball bearing 10, more precisely its hub 11, and the drive element 26 are made integral with the barrel shaft under the effect of the action of the head of the screw 30 on the element d drive, the screw 30 being screwed directly into the first free end 28 of the barrel shaft.
  • the third wheel 20 simply rests on the driving member 26 while being free to rotate relative thereto.
  • the satellite formed of the first and second wheels 14, 15 is arranged such that the wheels 14 and 15 are respectively opposite the fixed wheel 18 and the third wheel 20 to ensure their meshing.
  • the rotation of the oscillating mass 8 about the axis X1 causes a rotation of the first wheel 14 about the axis X2 because of its meshing with the fixed wheel 18.
  • the second wheel 15 is driven simultaneously in rotation which causes the rotation of the third wheel 20 about the first axis of rotation X1.
  • the ratio between, on the one hand, the gear ratio between the first wheel 14 and the fixed wheel 18, and on the other hand, the ratio gearing between the second wheel 15 and the third wheel 20 is different from 1.
  • this ratio is generally between 120 and 180 revolutions of oscillating weight in order to rotate the shaft. barrel of a turn.
  • the automatic winding mechanism according to the present invention offers simplified assembly and disassembly methods.
  • an eccentric arrangement of the oscillating mass 8 (which then has a diameter smaller than that of the movement) and the barrel, these two elements being coaxial, advantageously allows the manufacturer to benefit from great flexibility in the positioning of complications on the bridge side of the watch movement according to the present invention.
  • the skilled person may for example adapt the teaching that has just been exposed to the implementation of a bidirectional winding mechanism without departing from the scope of the present invention.
  • the third wheel 20 is arranged in engagement with two ratchet devices operating in opposite directions with respect to each other, in a conventional manner.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The invention relates to a movement for a timepiece with automatic winding that includes a frame (4, 5) bearing a mechanical power source (1), an oscillating weight (8) rotating relative to the frame about a first rotation axis (X1) and a reduction gear train (14, 15, 18, 20) arranged to recharge the mechanical power source from the movements of said oscillating weight. The movement is characterised in that the reduction gear train comprises at least a first wheel (14) arranged on the oscillating weight so as to rotate freely relative to the latter about a second rotation axis (X2) substantially parallel to the first rotation axis (X1). Preferably, the reduction gear train (14, 15, 18, 20) comprises a second wheel (15) coaxial with the first wheel (14) and rotatingly connected thereto, the first wheel being engaged with a fixed wheel (18) secured to the frame (4) while the second wheel is kinematically linked with a third wheel (20) of the reduction gear train, the rotation of which charges the mechanical power source (1).

Description

Domaine techniqueTechnical area

La présente invention concerne un mouvement pour pièce d'horlogerie à remontage automatique comprenant un bâti portant une source d'énergie mécanique, une masse oscillante rotative en référerice au bâti suivant un premier axe de rotation et un rouage démultiplicateur agencé pour recharger la source d'énergie mécanique à partir des mouvements de la masse oscillante.The present invention relates to a self-winding timepiece movement comprising a frame carrying a source of mechanical energy, a rotating oscillating mass in reference to the frame along a first axis of rotation and a gear reduction gear arranged to recharge the source of mechanical energy from the movements of the oscillating mass.

Etat de la techniqueState of the art

Un grand nombre de mouvements de ce type ont été décrits dans l'état de la technique.A large number of such movements have been described in the state of the art.

On connaît, par exemple, beaucoup de mouvements dans lesquels la masse oscillante est montée rotative au centre du mouvement en étant solidaire d'une roue dentée entraînant le rouage démultiplicateur pour remonter un ressort de barillet.There are, for example, many movements in which the oscillating mass is rotatably mounted at the center of the movement while being integral with a toothed wheel driving the gear reducer to raise a mainspring.

On connaît également des mouvements dans lesquels le rouage démultiplicateur a été disposé à la périphérie du mouvement plutôt que dans sa région centrale pour faciliter l'accès à certaines parties du mouvement. Dans ce cas, la masse oscillante est généralement solidaire d'un segment ou d'une couronne munie d'une denture interne agencée en prise avec une première roue du rouage démultiplicateur.Also known are movements in which the gear reducer has been disposed on the periphery of the movement rather than in its central region to facilitate access to certain parts of the movement. In this case, the oscillating mass is generally integral with a segment or a ring provided with an internal toothing arranged in engagement with a first wheel of the gear reducer.

A titre illustratif, le brevet CH 286 915 décrit un exemple d'un tel mouvement, dans lequel la masse oscillante présente la forme d'une couronne munie d'un balourd et est montée à la périphérie du mouvement au moyen de galets. Le document FR 2,146,509 divulgue un mouvement dans lequel la masse oscillante porte un cliquet pour la transmission au rouage démultiplicateur.As an illustration, the patent CH 286 915 describes an example of such a movement, wherein the oscillating mass has the form of a ring provided with an unbalance and is mounted on the periphery of the movement by means of rollers. The document FR 2,146,509 discloses a movement in which the oscillating weight carries a ratchet for transmission to the gear reducer.

La mise en place d'une masse oscillante à la périphérie du mouvement impose cependant de prévoir des moyens de maintien et de guidage complexes, comme des roulements à billes à moyeux creux de grands diamètres. En outre, sur la base d'un calibre à remontage automatique existant, il peut être nécessaire de redimensionner la boîte de la pièce d'horlogerie pour ménager un espace suffisant à recevoir le mécanisme de remontage automatique.The establishment of an oscillating mass at the periphery of the movement requires, however, to provide complex holding and guiding means, such as ball bearings with hollow hubs of large diameters. In addition, on the basis of an existing self-winding caliber, it may be necessary to resize the box of the piece to provide sufficient space to receive the automatic winding mechanism.

Divulgation de l'inventionDisclosure of the invention

La présente invention, définie par la revendication 1, a pour but principal de proposer une alternative aux mécanismes de remontage automatique connus, visant notamment à en simplifier la structure et l'assemblage.The present invention, defined by claim 1, has the main purpose of proposing an alternative to known automatic winding mechanisms, aimed in particular to simplify the structure and assembly.

A cet effet, la présente invention a pour objet un mouvement pour pièce d'horlogerie du type mentionné plus haut, caractérisé par le fait que le rouage démultiplicateur comporte au moins une première roue agencée sur la masse oscillante de manière à pouvoir tourner librement par rapport à cette dernière, suivant un second axe de rotation (X2) sensiblement parallèle au premier axe de rotation (X1).For this purpose, the subject of the present invention is a movement for a timepiece of the type mentioned above, characterized in that the gear train comprises at least one first wheel arranged on the oscillating mass so as to be able to freely rotate relative to to the latter, along a second axis of rotation (X2) substantially parallel to the first axis of rotation (X1).

De manière préférée, le rouage démultiplicateur comporte une seconde roue coaxiale à la première roue et solidaire en rotation de cette dernière, la première roue étant agencée en prise avec une roue fixe solidaire du bâti tandis que la seconde roue présente une liaison cinématique avec une troisième roue du rouage démultiplicateur dont la rotation est susceptible d'entraîner la charge de la source d'énergie mécanique.Preferably, the gear wheel includes a second wheel coaxial with the first wheel and integral in rotation thereof, the first wheel being arranged in engagement with a fixed wheel secured to the frame while the second wheel has a kinematic connection with a third wheel. wheel of the gear reducer whose rotation is likely to cause the charge of the source of mechanical energy.

En outre, il est préférable de prévoir que le ratio entre, d'une part, le rapport d'engrenage entre la première roue et la roue fixe, et d'autre part, le rapport d'engrenage entre la seconde roue et la troisième roue est différent de 1.In addition, it is preferable to provide the ratio between, on the one hand, the gear ratio between the first wheel and the fixed wheel, and on the other hand, the gear ratio between the second wheel and the third wheel. wheel is different from 1.

Grâce à ces caractéristiques, on obtient un mécanisme de remontage automatique dont une partie des composants est embarquée, c'est-à-dire portée directement par la masse oscillante.. Ainsi, lorsque la masse oscillante est retirée du mouvement, ce dernier est directement accessible du fait que les ponts ne sont pas encombrés par les composants du rouage démultiplicateur, comme c'est généralement le cas avec les - mouvements de l'état de la technique.Thanks to these characteristics, an automatic winding mechanism is obtained, part of which is embedded, that is to say carried directly by the oscillating mass. Thus, when the oscillating mass is removed from the movement, the latter is directly accessible because the bridges are not encumbered by the components of the gear reducer, as is generally the case with - movements of the state of the art.

Dans un mode de réalisation préféré, on prévoit que la roue fixe et la troisième roue sont coaxiales à la masse oscillante en étant disposées de part et d'autre de cette dernière.In a preferred embodiment, it is expected that the fixed wheel and the third wheel are coaxial with the oscillating mass being disposed on either side of the latter.

Par ailleurs, lorsque la source d'énergie mécanique est un ressort logé dans un barillet et dont une première extrémité est solidaire d'un arbre de barillet tandis que sa seconde extrémité est solidaire d'un tambour de barillet, l'arbre de barillet peut avantageusement être disposé de manière à être coaxial à la masse oscillante, soit dans une position centrale en référence au mouvement, soit dans une position décentrée.Moreover, when the source of mechanical energy is a spring housed in a barrel and whose first end is secured to a barrel shaft while its second end is secured to a barrel drum, the barrel shaft can advantageously be arranged to be coaxial with the oscillating mass, either in a central position with reference to the movement, or in an off-center position.

La présente invention concerne également une pièce d'horlogerie comprenant un mouvement du type qui vient d'être décrit.The present invention also relates to a timepiece comprising a movement of the type which has just been described.

Brève description des dessinsBrief description of the drawings

D'autres caractéristiques et avantages de l'invention apparaîtront plus clairement à la lecture de la description détaillée qui suit, faite en référence aux dessins annexés présentés à titre d'exemples non limitatifs et dans lesquels:Other features and advantages of the invention will emerge more clearly on reading the detailed description which follows, made with reference to the appended drawings presented by way of non-limiting examples and in which:

- la figure 1 représente une vue éclatée en perspective d'une partie d'un mouvement horloger comportant un mécanisme de remontage automatique selon un mode de réalisation préféré de la présente invention;- the figure 1 is an exploded perspective view of a portion of a watch movement having an automatic winding mechanism according to a preferred embodiment of the present invention;

- la figure 2 représente une vue en coupe des éléments représentés sur la figure 1, lorsqu'ils sont assemblés, et- the figure 2 represents a sectional view of the elements represented on the figure 1 , when assembled, and

- la figure 3 représente une vue en perspective des éléments représentés sur la figure 1, lorsqu'ils sont assemblés.- the figure 3 represents a perspective view of the elements represented on the figure 1 , when assembled.

Mode(s) de réalisation de l'inventionMode (s) of realization of the invention

Les figures 1 à 3 représentent de manière simplifiée, à titre illustratif non limitatif, les seuls éléments d'un mouvement horloger, selon un mode de réalisation préféré de la présente invention, qui sont nécessaires à la compréhension de cette dernière.The Figures 1 to 3 show in a simplified manner, by way of nonlimiting illustration, the only elements of a watch movement, according to a preferred embodiment of the present invention, which are necessary for the understanding of the latter.

La figure 1 représentent l'ensemble de ces éléments dans une vue éclatée en perspective.The figure 1 represent all of these elements in an exploded view in perspective.

Le mouvement horloger comporte une source d'énergie mécanique, illustrée ici sous la forme d'un ressort de barillet (visible uniquement sur la figure 2) logé dans un barillet 1 et dont une première extrémité (non visible) est solidaire d'un arbre de barillet 2 tandis que sa seconde extrémité (non visible) est solidaire d'un tambour de barillet 3.The watch movement comprises a source of mechanical energy, illustrated here in the form of a mainspring (visible only on the figure 2 ) housed in a barrel 1 and a first end (not visible) is integral with a barrel shaft 2 while its second end (not visible) is integral with a barrel drum 3.

Le barillet 1 est monté rotatif par rapport au bâti du mouvement horloger, son arbre 2 étant pivoté, de part et d'autre du tambour 3, dans un premier et un second éléments 4, 5 du bâti, qui peuvent être des ponts de barillet par exemple. L'un de ces éléments de bâti pourrait alternativement être la platine du mouvement.The barrel 1 is rotatably mounted relative to the frame of the watch movement, its shaft 2 being pivoted, on either side of the drum 3, in a first and a second element 4, 5 of the frame, which may be barrel bridges. for example. One of these frame elements could alternatively be the platinum of the movement.

Par ailleurs, le mouvement horloger comporte un mécanisme de remontage automatique, ici du type unidirectionnel, comprenant notamment une masse oscillante 8 montée rotative en référence au bâti du mouvement par l'intermédiaire d'un roulement à billes 10. Le roulement à billes comporte un moyeu 11 rendu solidaire de l'arbre de barillet, tel que cela ressortira plus clairement de la description détaillée qui sera exposée en relation avec la figure 2, et une bague extérieure 12, solidaire de la masse oscillante.Moreover, the watch movement comprises an automatic winding mechanism, here of the unidirectional type, comprising in particular an oscillating mass 8 rotatably mounted with reference to the frame of the movement by means of a ball bearing 10. The ball bearing comprises a hub 11 secured to the barrel shaft, as will be more clearly apparent from the detailed description which will be exposed in connection with the figure 2 , and an outer ring 12, integral with the oscillating mass.

Ainsi, suivant le mode de réalisation préféré qui est illustré, la masse oscillante présente un premier axe de rotation X1 qui est confondu avec l'axe de rotation de l'arbre de barillet 2.Thus, according to the preferred embodiment which is illustrated, the oscillating mass has a first axis of rotation X1 which coincides with the axis of rotation of the barrel shaft 2.

La masse oscillante porte un satellite, d'axe de rotation X2, comprenant une première roue dentée 14 située sous la planche de la masse oscillante sur la représentation de la figure 1 et une seconde roue dentée 15 située de l'autre côté de la planche de la masse oscillante. Les deux roues 14, 15 sont reliées l'une à l'autre au moyen d'une vis 16 disposée dans un trou adapté de la planche de la masse oscillante. Les deux roues 14 et 15 sont solidaires l'une de l'autre en rotation.The oscillating mass carries a satellite, of axis of rotation X2, comprising a first gear 14 located under the board of the oscillating mass on the representation of the figure 1 and a second gear 15 located on the other side of the board of the oscillating mass. The two wheels 14, 15 are connected to each other by means of a screw 16 disposed in a hole adapted to the board of the oscillating mass. The two wheels 14 and 15 are integral with each other in rotation.

La première roue 14 est agencée pour rouler sur la denture d'une roue fixe 18, solidaire du premier élément de bâti 4, lorsque la masse oscillante effectue une rotation suivant son axe X1. Suivant le mode de réalisation préféré de la présente invention tel qu'illustré, la roue fixe 18 est coaxiale à la masse oscillante 8.The first wheel 14 is arranged to roll on the toothing of a fixed wheel 18, integral with the first frame member 4, when the oscillating mass rotates along its axis X1. According to the preferred embodiment of the present invention as illustrated, the fixed wheel 18 is coaxial with the oscillating mass 8.

La seconde roue 15 est agencée pour engrener avec une troisième roue 20, également destinée à être assemblée au mouvement de manière à pivoter suivant le premier axe de rotation X1.The second wheel 15 is arranged to mesh with a third wheel 20, also intended to be assembled to the movement so as to pivot along the first axis of rotation X1.

La troisième roue 20 présente la forme d'une couronne dont la périphérie interne comprend une denture 22 prévue pour coopérer avec un dispositif à cliquets 23. Ce dernier est composé ici d'un anneau élastique comprenant deux dents 24 diamétralement opposées et présentant chacune une forme telle qu'une rotation de la troisième roue 20 dans un premier sens (anti-horaire sur la figure 1) n'entraîne pas l'anneau en rotation, du fait d'un glissement de la denture 22 sur les dents 24, tandis qu'une rotation de la troisième roue 20 dans le second sens de rotation entraîne une rotation de l'anneau dans le même sens (sens horaire sur la figure 1).The third wheel 20 has the shape of a ring whose inner periphery comprises a toothing 22 designed to cooperate with a device The latter is composed here of an elastic ring comprising two teeth 24 diametrically opposed and each having a shape such that a rotation of the third wheel 20 in a first direction (anti-clockwise on the figure 1 ) does not cause the ring to rotate, because of a sliding of the toothing 22 on the teeth 24, while a rotation of the third wheel 20 in the second direction of rotation causes a rotation of the ring in the same direction (clockwise on the figure 1 ).

Le dispositif à cliquets 23 est destiné à être rendu solidaire d'un élément d'entraînement 26 de l'arbre de barillet au moyen de vis non représentées.The ratchet device 23 is intended to be secured to a drive member 26 of the barrel shaft by means of screws not shown.

L'élément d'entraînement 26 présente une forme générale de disque dans lequel un trou central carré 27 a été ménagé pour coopérer en rotation avec une première extrémité 28 de l'arbre de barillet.The drive member 26 has a generally disk-like shape in which a square central hole 27 has been provided to cooperate in rotation with a first end 28 of the barrel shaft.

Une vis 30 permet de rendre l'élément d'entraînement 26 ainsi que le moyeu 11 du roulement à billes solidaires de l'arbre de barillet 2, tel que cela ressort mieux de la figure 2.A screw 30 makes it possible to make the driving element 26 and the hub 11 of the ball bearing integral with the barrel shaft 2, as is more clearly apparent from the figure 2 .

Par ailleurs, on notera que, du côté du second élément de bâti 5 opposé au barillet, un rochet de barillet 32 est prévu pour coopérer avec la seconde extrémité libre (référence numérique 33 sur la figure 2) de l'arbre de barillet. Plus précisément, le rochet de barillet est solidaire de l'arbre de barillet, ici au moyen d'une vis 35, et présente une liaison cinématique avec un mécanisme de remontage conventionnel (non représenté). Un cliquet 36 est également agencé, de manière connue, pour agir sur la denture du rochet de barillet et l'empêcher de tourner dans le sens anti-horaire sur la figure 1.Furthermore, it will be noted that, on the side of the second frame member 5 opposite the barrel, a barrel ratchet 32 is provided to cooperate with the second free end (numeral 33 on the figure 2 ) of the barrel shaft. More specifically, the barrel ratchet is integral with the barrel shaft, here by means of a screw 35, and has a kinematic connection with a conventional winding mechanism (not shown). A pawl 36 is also arranged, in known manner, to act on the toothing of the barrel ratchet and prevent it from rotating counterclockwise on the ratchet. figure 1 .

Les figures 2 et 3 représentent les composants de la figure 1 lorsqu'ils sont assemblés dans des vues, respectivement, en coupe et en perspective.The figures 2 and 3 represent the components of the figure 1 when they are assembled in views, respectively, in section and in perspective.

On constate, sur la vue de la figure 2, que le mécanisme de remontage automatique selon la présente invention constitue un empilement de composants sur la première extrémité libre 28 de l'arbre de barillet 2, ce qui est très favorable du point de vue de l'encombrement en référence aux mécanismes de l'art antérieur:We see, on the view of the figure 2 , that the automatic winding mechanism according to the present invention constitutes a stack of components on the first free end 28 of the barrel shaft 2, which is very favorable from the point of view of the bulk with reference to the mechanisms of the prior art:

En effet, partant du tambour de barillet 3, l'arbre de barillet 2 pivote dans une pierre 37 portée par la roue fixe 18, elle-même solidaire du premier élément de bâti 4. L'arbre de barillet 2 s'étend au-delà de cet élément de bâti pour porter le roulement à billes 10, agencé en butée contre un épaulement annulaire 38 de l'arbre de barillet 2 et sur lequel repose l'élément d'entraînement 26. Comme cela a déjà été mentionné plus haut, il apparaît de la figure 2 que le roulement à billes 10, plus précisément son moyeu 11, et l'élément d'entraînement 26 sont rendus solidaires de l'arbre de barillet sous l'effet de l'action de la tête de la vis 30 sur l'élément d'entraînement, la vis 30 étant vissée directement dans la première extrémité libre 28 de l'arbre de barillet.Indeed, starting from the barrel drum 3, the barrel shaft 2 pivots in a stone 37 carried by the fixed wheel 18, itself secured to the first frame member 4. The barrel shaft 2 extends beyond beyond this frame member to carry the ball bearing 10, arranged in abutment against an annular shoulder 38 of the barrel shaft 2 and on which the driving element 26 rests. As already mentioned above, it appears from the figure 2 that the ball bearing 10, more precisely its hub 11, and the drive element 26 are made integral with the barrel shaft under the effect of the action of the head of the screw 30 on the element d drive, the screw 30 being screwed directly into the first free end 28 of the barrel shaft.

La troisième roue 20 repose simplement sur l'élément d'entraînement 26 en étant libre de tourner par rapport à celui-ci.The third wheel 20 simply rests on the driving member 26 while being free to rotate relative thereto.

Le satellite formé des première et seconde roues 14, 15 est agencé de telle manière que les roues 14 et 15 se trouvent respectivement en regard de la roue fixe 18 et de la troisième roue 20 pour assurer leur engrènement.The satellite formed of the first and second wheels 14, 15 is arranged such that the wheels 14 and 15 are respectively opposite the fixed wheel 18 and the third wheel 20 to ensure their meshing.

Grâce à cette structure, la rotation de la masse oscillante 8 autour de l'axe X1 entraîne une rotation de la première roue 14 autour de l'axe X2 du fait de son engrènement avec la roue fixe 18. La seconde roue 15 est entraînée simultanément en rotation ce qui provoque la rotation de la troisième roue 20 autour du premier axe de rotation X1.Thanks to this structure, the rotation of the oscillating mass 8 about the axis X1 causes a rotation of the first wheel 14 about the axis X2 because of its meshing with the fixed wheel 18. The second wheel 15 is driven simultaneously in rotation which causes the rotation of the third wheel 20 about the first axis of rotation X1.

Il ressort plus particulièrement de la figure 3 que, lorsque la troisième roue 20 tourne dans le sens horaire (sur la vue de la figure 3), sa denture 22 coopère avec le dispositif à cliquets 23 pour l'entraîner et faire tourner l'élément d'entraînement 26. Dans ce cas, le ressort de barillet est remonté par rotation de l'arbre de barillet 2 autour de l'axe X1. Lorsque la troisième roue 20 tourne dans le sens anti-horaire, sa denture 22 glisse sur les dents 24 du dispositif à cliquets 23 qui n'est alors pas entraîné, de même que l'arbre de barillet 2. Ainsi, une rotation de la troisième roue 20 dans le sens de rotation anti-horaire n'agit pas sur le ressort de barillet.It is particularly apparent from the figure 3 that when the third wheel 20 rotates clockwise (on the view of the figure 3 ), its toothing 22 cooperates with the pawl device 23 to drive it and turn the drive element 26. In this case, the mainspring is raised by rotation of the barrel shaft 2 around the X1 axis. When the third wheel 20 rotates counterclockwise, its toothing 22 slides on the teeth 24 of the ratchet device 23 which is then not driven, as well as the barrel shaft 2. Thus, a rotation of the third wheel 20 in the anti-clockwise rotation direction does not act on the mainspring.

De manière préférée, le ratio entre, d'une part, le rapport d'engrenage entre la première roue 14 et la roue fixe 18, et d'autre part, le rapport d'engrenage entre la seconde roue 15 et la troisième roue 20 est différent de 1.Preferably, the ratio between, on the one hand, the gear ratio between the first wheel 14 and the fixed wheel 18, and on the other hand, the ratio gearing between the second wheel 15 and the third wheel 20 is different from 1.

Une telle mesure, outre les frottements d'engrenages, garantit que toute rotation de la masse oscillante 8 entraînera une rotation de l'arbre de barillet 2.Such a measurement, in addition to gear friction, ensures that any rotation of the oscillating mass 8 will cause rotation of the barrel shaft 2.

L'homme du métier ne rencontrera pas de difficulté particulière pour ajuster les rapports d'engrenages concernés pour obtenir le rapport de remontage souhaité, étant entendu que celui-ci se situe généralement entre 120 et 180 tours de masse oscillante pour faire tourner l'arbre de barillet d'un tour.Those skilled in the art will not encounter any particular difficulty in adjusting the gear ratios concerned to obtain the desired winding ratio, it being understood that this ratio is generally between 120 and 180 revolutions of oscillating weight in order to rotate the shaft. barrel of a turn.

Par ailleurs, il ressort également de la figure 2 que le rochet de barillet 32 est maintenu en appui contre un épaulement annulaire 40 ménagé au niveau de la seconde extrémité libre 33 de l'arbre de barillet sous l'effet de l'action de la tête de la vis 35.Moreover, it is also apparent from figure 2 that the barrel ratchet 32 is held in abutment against an annular shoulder 40 formed at the second free end 33 of the barrel shaft under the action of the head of the screw 35.

On notera qu'en plus de présenter un nombre de composants et un encombrement réduits en référence aux mécanismes de l'art antérieur, le mécanisme de remontage automatique selon la présente invention offre des procédés de montage et démontage simplifiés.It will be noted that in addition to having a reduced number of components and dimensions in reference to the mechanisms of the prior art, the automatic winding mechanism according to the present invention offers simplified assembly and disassembly methods.

La description qui précède s'attache à décrire un mode de réalisation particulier à titre d'illustration non limitative et, l'invention n'est pas limitée, par exemple, à la mise en oeuvre d'un mouvement à remontage automatique dans lequel le barillet et la masse oscillante sont coaxiaux. En effet, il est possible, notamment dans le cas où la masse oscillante est ventrée sur le mouvement, le barillet ne l'étant pas, de prévoir que l'élément d'entraînement 26 n'est pas directement porté par l'arbre de barillet mais présente une liaison avec lui faisant intervenir un engrenage.The foregoing description attempts to describe a particular embodiment by way of non-limiting illustration and the invention is not limited, for example, to the implementation of a self-winding movement in which the Barrel and the oscillating weight are coaxial. Indeed, it is possible, especially in the case where the oscillating mass is biased on the movement, the barrel is not, to provide that the drive member 26 is not directly carried by the shaft of barrel but has a connection with him involving a gear.

Toutefois, un agencement excentré de la masse oscillante 8 (celle-ci présentant alors un diamètre plus faible que celui du mouvement) et du barillet, ces deux éléments étant coaxiaux, permet avantageusement au constructeur de bénéficier d'une grande flexibilité dans le positionnement de complications du côté ponts du mouvement horloger selon la présente invention.However, an eccentric arrangement of the oscillating mass 8 (which then has a diameter smaller than that of the movement) and the barrel, these two elements being coaxial, advantageously allows the manufacturer to benefit from great flexibility in the positioning of complications on the bridge side of the watch movement according to the present invention.

Par ailleurs, l'homme du métier pourra par exemple adapter l'enseignement qui vient d'être exposé à la mise en oeuvre d'un mécanisme de remontage bidirectionnel sans sortir du cadre de la présente invention. Dans ce cas, on pourra par exemple prévoir que la troisième roue 20 est agencée en prise avec deux dispositifs à cliquets fonctionnant en sens inverses l'un par rapport à l'autre, de manière conventionnelle.Furthermore, the skilled person may for example adapt the teaching that has just been exposed to the implementation of a bidirectional winding mechanism without departing from the scope of the present invention. In this case, it may for example be provided that the third wheel 20 is arranged in engagement with two ratchet devices operating in opposite directions with respect to each other, in a conventional manner.

Claims (12)

  1. Movement for a timepiece with automatic winding that includes a frame (4, 5) bearing a mechanical power source (1), an oscillating weight (8) rotating relative to said frame about a first rotation axis (X1) and a reduction gear train (14, 15, 18, 20) arranged to recharge said mechanical power source from the movements of said oscillating weight, characterised in that said reduction gear train comprises a least a first wheel (14) arranged on said oscillating weight so as to rotate freely relative to the latter about a second rotation axis (X2) substantially parallel to said first rotation axis (X1).
  2. Movement in accordance with claim 1 characterised in that said reduction gear train (14, 15,18,20) comprises a second wheel (15) coaxial with the first wheel (14) and rotatingly connected thereto, said first wheel being engaged with a fixed wheel (18) secured to said frame (4) while said second wheel is kinematically linked with a third wheel (20) of said reduction gear train, the rotation of which serves to charge said mechanical power source.
  3. Movement in accordance with claim 2 characterised in that said fixed wheel (18) and said third wheel (20) are coaxial to said oscillating weight (8) being arranged on either side of the latter.
  4. Movement in accordance with claim 3 in which said mechanical power source comprises a spring housed in a barrel (1), the first end of which is fixed to a barrel arbor (2), while the other end is fixed to a barrel drum (3), characterised in that said third wheel (20) presents a kinematic connection with a driving element (26) of said barrel arbor, said reduction gear train further comprising at least one ratchet mechanism (23) so arranged as to permit a rotation of said barrel arbor in only one direction of rotation.
  5. Movement in accordance with claim 4 characterised in that it is a unidirectional rewinding type, said third wheel (20) presenting a toothing (22) to cooperate with said ratchet mechanism (23) in such a way as to drive it in only one direction of rotation, the latter being fixed to said driving element (26), itself coaxial with said barrel arbor (2) and rotating together with it.
  6. Movement in accordance with claim 5 characterised in that said ratchet mechanism (23) is arranged inside said third wheel (20), the said toothing (22) of which is an internal toothing.
  7. Movement in accordance with any of claims 4 to 6 characterised in that said barrel arbor (2) is so arranged as to follow said first axis of rotation (X1).
  8. Movement in accordance with claim 7 characterised in that said barrel arbor (2) presents a first free end (28) pivoting in an element (4) of said frame, which carries said fixed wheel (18), said barrel arbor extending beyond said frame element and bearing, on the side of said first free end (28) in relation to said frame element, a ballrace (10) on which said oscillating weight (8) is rotatingly mounted, as well as said driving element (26), on which pivots freely said third wheel (20) and said ratchet mechanism (23).
  9. Movement in accordance with claim 8 characterised in that said barrel arbor (2) presents a second free end (33) pivoting in an additional frame element (5) and bearing a barrel ratchet (32) connected kinematically to a rewinding mechanism.
  10. Movement in accordance with any of claims 2 to 9 characterised in that said oscillating weight (8) comprises a plate, said first and second wheels (14, 15) being arranged on either side of said plate, being connected through a hole drilled in the latter.
  11. Movement in accordance with any of claims 2 to 10 characterised in that the ratio between, on the one hand, the gear ratio between said first wheel (14) and said fixed wheel (18) and, on the other, the gear ratio between said second wheel (15) and said third wheel (20) is different from 1.
  12. Timepiece comprising a movement in accordance with any of the preceding claims.
EP09777297A 2008-08-14 2009-07-20 Movement for a timepiece with an integrated automatic winding device Active EP2313812B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01276/08A CH699325A2 (en) 2008-08-14 2008-08-14 Movement timepiece a device for winding board.
PCT/EP2009/005245 WO2010017874A1 (en) 2008-08-14 2009-07-20 Movement for a timepiece with an onboard automatic winding device

Publications (2)

Publication Number Publication Date
EP2313812A1 EP2313812A1 (en) 2011-04-27
EP2313812B1 true EP2313812B1 (en) 2011-11-09

Family

ID=41347682

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09777297A Active EP2313812B1 (en) 2008-08-14 2009-07-20 Movement for a timepiece with an integrated automatic winding device

Country Status (4)

Country Link
EP (1) EP2313812B1 (en)
AT (1) ATE533090T1 (en)
CH (1) CH699325A2 (en)
WO (1) WO2010017874A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH702590B1 (en) * 2010-01-26 2015-03-13 Mps Micro Prec Systems Ag automatic winding system.
CH705938B1 (en) * 2011-12-23 2016-04-29 Mft Et Fabrique De Montres Et Chronomètres Ulysse Nardin Le Locle S A Planetary gear timepiece.
EP2860590B1 (en) * 2013-10-10 2016-04-06 Patek Philippe SA Genève Automatic winding device for a timepiece
CN106773591B (en) * 2016-12-16 2019-10-11 南通市知识产权维权援助中心 Machine core and mechanical watch with the machine core
EP3739393A1 (en) * 2019-05-17 2020-11-18 Patek Philippe SA Genève Self-winding watch movement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3086402A (en) * 1959-09-11 1963-04-23 Raoul H Erard Self-winding mechanism for timepieces
CH552843A (en) * 1971-07-22 1974-08-15
DE602006004957D1 (en) * 2006-02-22 2009-03-12 Blancpain Sa Self-winding watch with a power reserve indicator

Also Published As

Publication number Publication date
ATE533090T1 (en) 2011-11-15
WO2010017874A1 (en) 2010-02-18
EP2313812A1 (en) 2011-04-27
CH699325A2 (en) 2010-02-15

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