EP3435173A1 - Mechanical movement with isochronous rotary resonator, which is not position-sensitive - Google Patents
Mechanical movement with isochronous rotary resonator, which is not position-sensitive Download PDFInfo
- Publication number
- EP3435173A1 EP3435173A1 EP17183211.6A EP17183211A EP3435173A1 EP 3435173 A1 EP3435173 A1 EP 3435173A1 EP 17183211 A EP17183211 A EP 17183211A EP 3435173 A1 EP3435173 A1 EP 3435173A1
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- EP
- European Patent Office
- Prior art keywords
- movement
- axis
- central
- mobile
- pivot
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- 238000004146 energy storage Methods 0.000 claims abstract description 4
- 230000009975 flexible effect Effects 0.000 claims description 33
- 239000010703 silicon Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 230000036316 preload Effects 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 description 15
- 230000005484 gravity Effects 0.000 description 6
- 230000001629 suppression Effects 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000004434 saccadic eye movement Effects 0.000 description 3
- 230000003416 augmentation Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241001080024 Telles Species 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000034373 developmental growth involved in morphogenesis Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
Images
Classifications
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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
- G04B17/00—Mechanisms for stabilising frequency
- G04B17/04—Oscillators acting by spring tension
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/08—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for recovering energy derived from swinging, rolling, pitching or like movements, e.g. from the vibrations of a machine
-
- 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
- G04B17/00—Mechanisms for stabilising frequency
- G04B17/20—Compensation of mechanisms for stabilising frequency
- G04B17/26—Compensation of mechanisms for stabilising frequency for the effect of variations of the impulses
-
- 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
- G04B17/00—Mechanisms for stabilising frequency
- G04B17/20—Compensation of mechanisms for stabilising frequency
- G04B17/28—Compensation of mechanisms for stabilising frequency for the effect of imbalance of the weights, e.g. tourbillon
-
- 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
- G04B17/00—Mechanisms for stabilising frequency
- G04B17/30—Rotating governors, e.g. centrifugal governors, fan governors
-
- 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
- G04B17/00—Mechanisms for stabilising frequency
- G04B17/04—Oscillators acting by spring tension
- G04B17/045—Oscillators acting by spring tension with oscillating blade springs
Definitions
- the invention relates to a clockwork mechanical movement comprising at least one energy storage means arranged to drive a gear train of which an output gear is arranged to pivot about a motor axis, and comprising a rotary resonator which comprises at least a central mobile, arranged to pivot about a central axis, and having an input mobile arranged to cooperate with the output mobile.
- the invention also relates to a watch comprising such a movement.
- the invention relates to the field of time bases for mechanical watch movements.
- the exhaust must be robust, withstand shocks, avoid trapping the movement (overturning), and foolproof over time.
- the Swiss lever escapement the most commonly used, has a low energy efficiency, of the order of 30%. This low efficiency comes from the fact that the movements of the exhaust are jerky, that there are falls or lost paths that are necessary to accommodate machining dispersions, and also that several components are transmitted their movement. via inclined planes that rub against each other.
- the present invention aims to eliminate the saccades of the exhaust, in order to increase the efficiency.
- a rotary resonator is proposed, characterized in particular by the possibility of maintaining the rotation by a torque applied directly on the axis of the resonator, thus avoiding the dynamic losses of a classic anchor escapement.
- a mechanism like the Watt regulator can be a rotational resonator base, but at the cost of modifications to make it isochronous and insensitive to gravity.
- the Watt regulator is sensitive to its orientation in the gravity field, because the global center of mass of the two flyweights moves when the amplitude changes: the flyweights go up along the axis when the amplitude increases. Therefore, the contribution of gravity to the restoring force fluctuates with the orientation.
- the watt regulator is anisochronous because the return force of the weights, spring and / or gravity does not meet certain conditions.
- the invention relates to a mechanical clockwork movement according to claim 1.
- the invention also relates to a watch comprising such a movement.
- the demand EP16195399 of the same applicant relates to a resonator mechanism for a watch movement, comprising a mounted entrance mobile pivoting about an axis of rotation and subjected to a driving torque, and having a central mobile, integral in rotation with the input mobile about the axis of rotation and arranged to rotate continuously.
- This resonator mechanism comprises a plurality of N inertial elements, each movable in at least one degree of freedom with respect to the central mobile, and biased towards the axis of rotation by elastic return means, which are arranged to cause a return force on the center of mass of the inertial element.
- This resonator mechanism has a symmetry of rotation of order N.
- This resonator mechanism comprises means of kinematic connection between all the inertial elements, and which are arranged to maintain, at all times, all the centers of mass of the inertial elements to the same distance from the axis of rotation, and the elastic return means cause an elastic potential characterized by a particular relationship. More particularly, this resonator mechanism has a pantograph type structure.
- the driving torque and the aerodynamic resistance couple generate a radial force that adds to the elastic potential, and disturbs the isochronism.
- the present invention proposes to orient differently the pivoting of the inertial elements, so as not to disturb the isochronism by the drive or tangential aerodynamic forces.
- the figure 1 illustrates a variant of the resonator mechanism according to the invention, wherein the pivoting of the inertial elements is orthogonal to the pivoting of the drive.
- the figure 2 shows that the complex articulated linkage of the mechanism of figure 1 , arising directly from the request EP16195399 , can disappear in favor of a very simple structure: the present invention has the advantage of combining the drive mobile and the resonator in a single entity very simple to achieve.
- This mechanism avoids the shocks and the friction inherent to mechanisms of drive with groove, or crank-crank, poorly tuned.
- the invention avoids the unnecessary multiplication of elastic elements, between the plate and the inertial element on the one hand, and between the drive mobile and the inertial element on the other hand.
- the invention relates to a watchmaking mechanical movement 100 comprising at least one energy storage means 200, such as a barrel or the like, arranged to drive a gear train 300 including an output mobile is arranged to pivot around 'an engine axis.
- This movement 100 comprises a rotary resonator 10, which comprises at least one central mobile 1, arranged to pivot about a central axis A.
- this central axis A is parallel or perpendicular to the motor axis.
- the central mobile 1 comprises an input mobile 2, which is arranged to cooperate with the mobile output.
- the rotary resonator 10 comprises at least one inertial element 3 arranged to pivot relative to the central mobile 1 about a secondary axis B perpendicular to the central axis A and intersecting with it, and returned to a position of rest, relative to the central mobile 1, by at least one elastic return element 4, and this secondary axis B passes through the center of mass of the inertial element 3 associated therewith.
- the rotary resonator 10 comprises a plurality of inertial elements 3, each arranged to pivot relative to the central mobile 1 about a secondary axis B perpendicular to the central axis A and intersecting with it, and each recalled to a rest position, relative to the central mobile 1, by at least one elastic return element 4.
- each secondary axis B passes through the center of mass of the inertial element 3 associated with it.
- this rotary resonator 10 has, in a rest position, a symmetry of rotation about the central axis A, of order N, where N is an integer greater than or equal to 2.
- the inertial elements 3 that comprises the rotary resonator 10 are, in a rest position, rotational symmetry around the central axis A, of order N, where N is an integer greater than or equal to 2.
- each inertial element 3 has a rotation symmetry of order 2 around its secondary axis B.
- At least one elastic return element 4 is fixed at a first end to the central mobile 1, and at a second end to the inertial element 3.
- At least one elastic return element 4 is fixed at one end to an inertial element 3, and at a second end to another inertial element 3.
- each elastic return element 4 is fixed at a first end to the central mobile 1, and at a second end to an inertial element 3.
- all the inertial elements 3 of the same rotary resonator 10 are arranged to pivot about a common secondary axis B.
- At least one said inertial element 3 is at least 5 times longer than wide, and at least 5 times wider than thick.
- the rotary resonator 10 comprises at least one flexible guide, to ensure the pivoting and the elastic return of at least one inertial element 3 with respect to the central mobile 1.
- This flexible guide can be achieved in different ways: flexible blades or collared blades, arranged in a plane crosswise manner, or in parallel planes and crossed in projection on one of these parallel planes, or arranged according to a configuration RCC (Remote Center Compliance) that is to say, to offset center of rotation, the blades making a vee between them, or others.
- RCC Remote Center Compliance
- these flexible guides can be, or reported on the central mobile 1 and / or on an inertial element 3, or be monobloc with at least one or both.
- the monobloc embodiments may be made of micro-machinable material, implemented by "Liga” or “Mems” method or the like, of at least partially amorphous material, silicon and silicon oxide, "DLC” (diamond like carbon), Or other.
- this flexible guide is a pivot with blades which are, or crossed coplanar, or crossed in projection on a projection plane perpendicular to the central axis A as in the embodiment of the figure 4 .
- This configuration has the advantage of guaranteeing excellent performance.
- the overall center of mass remains fixed, and that the cumulation of possible parasitic displacements of the individual centers of mass of the inertial elements, during their pivoting, is canceled. That is, the overall center of mass of the entire rotational resonator remains fixed regardless of amplitude. This can be achieved in particular by the combination of geometric symmetry in rotation, and by the choice of identical flexible guidance for the entire rotary resonator 10: each inertial element 3 which composes it is recalled by the same flexible guide.
- the figure 5 shows an asymmetrical cross-leaf swivel: this flexible guide is arranged to print to the inertial element 3 a return torque proportional to the sine of twice the swivel angle of said inertial element 3.
- This flexible guide comprises two flexible blades 31, 32, asymmetrical each joining a first recess 41, 42, the central mobile 1 to a second recess 51, 52 of the inertial element 3.
- These first recesses 41, 42 define with the second recesses 51, 52, respectively two main directions DL1, DL2 blades.
- the central mobile 1 and the inertial element 3 are each more rigid than each of the flexible blades 31, 32.
- the two main blade directions DL1, DL2, define a theoretical pivot axis D, at their intersection when these two flexible blades 31 , 32 are coplanar, or at the crossroads of their projections on the plane of projection when the two flexible blades 31, 32, develop on two levels parallel to the plane of projection but are not coplanar as in the case of the figure 4 , and at an apex angle ⁇ equal to 112.5 °.
- the second 32 of these blades has, between its opposite recesses, a second total length L2 triple of the first total length L1 of the first 31 of the blades.
- the distances between the first recesses 41, 42, and the theoretical pivot axis D are, for the second blade 32 a second axial distance D2 equal to 0.875 times the second total length L2, and, for the first blade 31, a first axial distance D1 equal to 0.175 times the first total length L1.
- the figure 6 shows a RCC configuration, with a remote center of rotation, which is not carried out integrally, but where the blades are angularly constrained by a small angle, in the vicinity of at least one of their ends, for example by introduction of a slot offset laterally with respect to the theoretical blade direction.
- the flexible guide provided by this particular RCC pivot also makes it possible to create a torque proportional to the sine of twice the angle, said flexible guide is produced by a pivot pin with a remote center of rotation constituting a virtual pivot, the embedding of which blades 31, 32, in housings 51, 52, that includes the central mobile 1 and / or the inertial element 3 results from an angular preload of 0.15 radian, with a torsion to the embedding, the angle at the summit that form the directions of the recesses of the blades 31, 32, at the virtual pivot is 52.642 °, and the distance between the virtual pivot and the nearest recess is equal to 0.268864 times the length of each of the blades 31, 32, which are here identical, between their embedding in the free state before the prestressing of their end.
- this flexible guide is thermally compensated.
- this flexible guide comprises blades of oxidized silicon, on which a differential growth of silicon dioxide during a heat treatment makes it possible to put under high prestressing elements of smaller section, such as blades within a monobloc set.
- the rotary resonator 10 comprises, articulated with certain inertial elements 3, additional kinetic connecting elements 5, which constitute with these inertial elements 3 a structure articulated pantograph type, and which are arranged to increase the radial deployment of the rotary resonator 10 by limiting its height along the central axis A.
- the movement 100 comprises at least one main axis P of display by needles or disks, and the central axis A is parallel to this main axis P.
- the central axis A is this time perpendicular to the main axis P.
- the mobile output of gear train 300 is a worm gear, arranged to cooperate with a pinion which constitutes the input mobile 2.
- the rotary resonator 10 comprises only two or three inertial elements 3. Indeed, a compromise is to be found between the performance and the bulk, and a resonator with two inertial elements rotational symmetry ensures the required performance.
- the pivoting of the central mobile unit 1 is performed on at least one magnetic pivot, so as to obtain the best efficiency.
- the invention also relates to a mechanical watch 1000 comprising at least one such movement.
- the invention allows a gain of a factor 10 on the performance of the movement.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Micromachines (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
- Electromechanical Clocks (AREA)
- Electric Clocks (AREA)
Abstract
Mouvement (100) mécanique d'horlogerie comportant au moins un moyen de stockage d'énergie (200) agencé pour entraîner un rouage (300) dont un mobile de sortie est agencé pour pivoter autour d'un axe moteur, et comportant un résonateur rotatif (10) lequel comporte au moins un mobile central (1), agencé pour pivoter autour d'un axe central (A), et comportant un mobile d'entrée (2) agencé pour coopérer avec le mobile de sortie, ce résonateur rotatif (10) comporte une pluralité d'éléments inertiels (3) chacun agencé pour pivoter par rapport au mobile central (1) autour d'un axe secondaire (B) perpendiculaire à l'axe central (A) et chacun rappelé vers une position de repos, relative par rapport au mobile central (1), par au moins un élément de rappel élastique (4), et chaque axe secondaire (B) passe par le centre de masse de l'élément inertiel (3) qui lui est associé. Clockwork mechanical movement (100) comprising at least one energy storage means (200) arranged to drive a gear train (300), an output mobile of which is arranged to pivot about a motor axis, and comprising a rotary resonator (10) which comprises at least one central mobile (1), arranged to pivot about a central axis (A), and comprising an input mobile (2) arranged to cooperate with the output mobile, this rotary resonator ( 10) comprises a plurality of inertial elements (3) each arranged to pivot relative to the central mobile (1) about a secondary axis (B) perpendicular to the central axis (A) and each recalled to a rest position , relative to the central mobile (1), by at least one elastic return element (4), and each secondary axis (B) passes through the center of mass of the inertial element (3) associated therewith.
Description
L'invention concerne un mouvement mécanique d'horlogerie comportant au moins un moyen de stockage d'énergie agencé pour entraîner un rouage dont un mobile de sortie est agencé pour pivoter autour d'un axe moteur, et comportant un résonateur rotatif lequel comporte au moins un mobile central, agencé pour pivoter autour d'un axe central, et comportant un mobile d'entrée agencé pour coopérer avec le mobile de sortie.The invention relates to a clockwork mechanical movement comprising at least one energy storage means arranged to drive a gear train of which an output gear is arranged to pivot about a motor axis, and comprising a rotary resonator which comprises at least a central mobile, arranged to pivot about a central axis, and having an input mobile arranged to cooperate with the output mobile.
L'invention concerne encore une montre comportant un tel mouvement.The invention also relates to a watch comprising such a movement.
L'invention concerne le domaine des bases de temps pour mouvements d'horlogerie mécaniques.The invention relates to the field of time bases for mechanical watch movements.
La plupart des montres mécaniques actuelles sont munies d'un balancier-spiral et d'un échappement à ancre suisse. Le balancier-spiral constitue la base de temps de la montre. On l'appelle aussi résonateur. L'échappement, quant à lui, rempli deux fonctions principales:
- entretenir les va-et-vient du résonateur ;
- compter ces va-et-vient.
- maintain the comings and goings of the resonator;
- count these back and forth.
En plus de ces deux fonctions principales, l'échappement, doit être robuste, résister aux chocs, éviter de coincer le mouvement (renversement), et indéréglable dans le temps.In addition to these two main functions, the exhaust must be robust, withstand shocks, avoid trapping the movement (overturning), and foolproof over time.
L'échappement à ancre suisse, le plus généralement utilisé, a un rendement énergétique faible, de l'ordre de 30%. Ce faible rendement provient du fait que les mouvements de l'échappement sont saccadés, qu'il y a des chutes ou chemins perdus qui sont nécessaires pour s'accommoder des dispersions d'usinage, et aussi du fait que plusieurs composants se transmettent leur mouvement via des plans inclinés qui frottent les uns par rapport aux autres.The Swiss lever escapement, the most commonly used, has a low energy efficiency, of the order of 30%. This low efficiency comes from the fact that the movements of the exhaust are jerky, that there are falls or lost paths that are necessary to accommodate machining dispersions, and also that several components are transmitted their movement. via inclined planes that rub against each other.
La présente invention a pour objectif de supprimer les saccades de l'échappement, afin d'en augmenter le rendement. Pour atteindre cet objectif, on propose un résonateur rotatif, caractérisé notamment par la possibilité d'entretenir la rotation par un couple appliqué directement sur l'axe du résonateur, évitant ainsi les pertes dynamiques d'un échappement à ancre classique.The present invention aims to eliminate the saccades of the exhaust, in order to increase the efficiency. To achieve this objective, a rotary resonator is proposed, characterized in particular by the possibility of maintaining the rotation by a torque applied directly on the axis of the resonator, thus avoiding the dynamic losses of a classic anchor escapement.
Historiquement, les horlogers n'ont pas considéré les résonateurs rotatifs comme base de temps pour les montres car les résonateurs rotatifs ne sont généralement pas isochrones, et ils sont de surcroît sensibles à la gravité, donc à la position de la montre dans le champ de pesanteur.Historically, watchmakers have not considered rotary resonators as a time base for watches because rotary resonators are not usually isochronous, and they are also sensitive to gravity, therefore to the position of the watch in the field of view. gravity.
Un mécanisme comme le régulateur de Watt peut constituer une base de résonateur rotatif, mais au prix de modifications pour le rendre isochrone et insensible à la gravité. En effet, le régulateur de Watt est sensible à son orientation dans le champ de gravité, car le centre de masse global des deux masselottes se déplace lorsque l'amplitude change : les masselottes montent le long de l'axe lorsque l'amplitude augmente. Dès lors, la contribution de la gravité à la force de rappel fluctue avec l'orientation. De plus le régulateur de watt est anisochrone car la force de rappel des masselottes, par ressort et/ou par gravité ne répond pas à certaines conditions.A mechanism like the Watt regulator can be a rotational resonator base, but at the cost of modifications to make it isochronous and insensitive to gravity. Indeed, the Watt regulator is sensitive to its orientation in the gravity field, because the global center of mass of the two flyweights moves when the amplitude changes: the flyweights go up along the axis when the amplitude increases. Therefore, the contribution of gravity to the restoring force fluctuates with the orientation. In addition the watt regulator is anisochronous because the return force of the weights, spring and / or gravity does not meet certain conditions.
L'invention s'attache donc à remplir les conditions qui permettent d'avoir un résonateur rotatif utilisable comme base de temps pour un instrument horaire :
- condition d'isochronisme : existence de forces de rappel élastiques (ou potentiel élastique) provoquant sur le centre de masse de chaque demi-bras une force centrale d'intensité proportionnelle à la distance entre l'axe de rotation et le centre de masse du demi-bras ;
- condition d'insensibilité aux positions : utilisation d'au moins deux demi-bras guidés, de façon à pouvoir éloigner leur centre de masse de l'axe de rotation, tout en maintenant le centre de masse global du résonateur en position fixe ;
- condition de forces de réactions nulles dans le support: utilisation de bras répartis en symétrie autour de l'axe, pour annuler les réactions dans les pivots à toutes les amplitudes.
- isochronism condition: existence of elastic return forces (or elastic potential) causing on the center of mass of each half-arm a central force of intensity proportional to the distance between the axis of rotation and the center of mass of the half -arms ;
- condition of insensitivity to the positions: use of at least two guided half-arms, so as to move their center of mass away from the axis of rotation, while maintaining the overall center of mass of the resonator in a fixed position;
- condition of zero reaction forces in the support: use of arms distributed symmetrically about the axis, to cancel the reactions in the pivots at all amplitudes.
A cet effet, l'invention concerne un mouvement mécanique d'horlogerie selon la revendication 1.For this purpose, the invention relates to a mechanical clockwork movement according to
L'invention concerne encore une montre comportant un tel mouvement.The invention also relates to a watch comprising such a movement.
D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui va suivre, en référence aux dessins annexés, où :
- la
figure 1 représente, de façon schématisée et en perspective, une première variante de mécanisme résonateur selon l'invention, réalisée sur la base base du mécanisme résonateur à pantographe selon la demandeEP16195399 - la
figure 2 représente, de façon similaire à lafigure 1 , une autre variante de mécanisme résonateur selon l'invention, simplifiée par suppression des liaisons cinématiques articulées ; - la
figure 3 représente le détail d'un mécanisme résonateur rotatif, similaire à celui de lafigure 2 , comportant un mobile central agencé pour pivoter autour d'un axe central, et par rapport auquel sont mobiles, selon un axe orthogonal, deux éléments inertiels méplats, rappelés vers le mobile central par des moyens de rappel élastique ici constitués par des vés élastiques à lames fines ; - la
figure 4 est une variante dans laquelle les moyens de rappel élastique sont constitués par des guidages flexibles à lames croisées, chaque guidage flexible comportant deux niveaux et une lame par niveau, ces deux lames se croisant en projection sur un pan parallèle à ceux des niveaux ; - la
figure 5 est une vue en projection plane d'un premier agencement comportant deux telles lames croisées asymétriques, dans un agencement particulier agencé pour créer un couple de rappel proportionnel au sinus du double de l'angle de pivotement ; - la
figure 6 est une vue en projection plane d'un deuxième agencement comportant deux lames formant un pivot RCC à centre de rotation déporté, dans un agencement particulier agencé pour créer également un couple de rappel proportionnel au sinus du double de l'angle de pivotement ; - la
figure 7 représente, de façon schématisée et en perspective, un mouvement comportant un tel résonateur rotatif, d'axe central parallèle à l'axe principal d'affichage du mouvement ; - la
figure 8 représente, de façon schématisée et en perspective, un mouvement comportant un tel résonateur rotatif, d'axe central perpendiculaire à l'axe principal d'affichage du mouvement.
- the
figure 1 represents, schematically and in perspective, a first variant of the resonator mechanism according to the invention, made on the basis of the pantograph resonator mechanism according to the applicationEP16195399 - the
figure 2 represents, similarly to thefigure 1 another variant of the resonator mechanism according to the invention, simplified by eliminating articulated kinematic links; - the
figure 3 represents the detail of a rotary resonator mechanism, similar to that of thefigure 2 , comprising a central mobile arranged to pivot about a central axis, and relative to which are movable, along an orthogonal axis, two flat inertial elements, biased towards the central mobile by resilient return means here constituted by elastic struts to thin blades; - the
figure 4 is a variant in which the elastic return means are constituted by flexible guides crossed blades, each flexible guide having two levels and a blade per level, these two blades intersecting in projection on a parallel pan to those levels; - the
figure 5 is a planar projection view of a first arrangement comprising two such asymmetrical crossed blades, in a particular arrangement arranged to create a return torque proportional to the sine of the double of the pivot angle; - the
figure 6 is a planar projection view of a second arrangement comprising two blades forming a RCC pivot with a remote center of rotation, in a particular arrangement arranged to also create a return torque proportional to the sine of the double of the pivot angle; - the
figure 7 represents schematically and in perspective, a movement comprising such a rotary resonator, with a central axis parallel to the main axis of movement display; - the
figure 8 represents, schematically and in perspective, a movement comprising such a rotary resonator, with a central axis perpendicular to the main axis of movement display.
La demande
Il s'agit ici d'améliorer un tel mécanisme. En effet, le couple d'entraînement et le couple de résistance aérodynamique génèrent une force radiale qui s'ajoute au potentiel élastique, et vient perturber l'isochronisme.This is to improve such a mechanism. Indeed, the driving torque and the aerodynamic resistance couple generate a radial force that adds to the elastic potential, and disturbs the isochronism.
La présente invention se propose d'orienter différemment le pivotement des éléments inertiels, afin de ne pas perturber l'isochronisme par l'entraînement ou des forces aérodynamiques tangentielles. La
La
Ce mécanisme évite les chocs et les frottements inhérents à des mécanismes d'entraînement à rainure, ou bielle-manivelle, mal accordés.This mechanism avoids the shocks and the friction inherent to mechanisms of drive with groove, or crank-crank, poorly tuned.
L'invention évite la multiplication inutile d'éléments élastiques, entre la platine et l'élément inertiel d'une part, et entre le mobile d'entraînement et l'élément inertiel d'autre part.The invention avoids the unnecessary multiplication of elastic elements, between the plate and the inertial element on the one hand, and between the drive mobile and the inertial element on the other hand.
Ainsi, l'invention concerne un mouvement 100 mécanique d'horlogerie comportant au moins un moyen de stockage d'énergie 200, tel qu'un barillet ou similaire, agencé pour entraîner un rouage 300 dont un mobile de sortie est agencé pour pivoter autour d'un axe moteur.Thus, the invention relates to a watchmaking
Ce mouvement 100 comporte un résonateur rotatif 10, lequel comporte au moins un mobile central 1, agencé pour pivoter autour d'un axe central A.This
Plus particulièrement cet axe central A est parallèle ou perpendiculaire à l'axe moteur.More particularly, this central axis A is parallel or perpendicular to the motor axis.
Le mobile central 1 comporte un mobile d'entrée 2, qui est agencé pour coopérer avec le mobile de sortie.The central mobile 1 comprises an input mobile 2, which is arranged to cooperate with the mobile output.
Selon l'invention, le résonateur rotatif 10 comporte au moins un élément inertiel 3 agencé pour pivoter par rapport au mobile central 1 autour d'un axe secondaire B perpendiculaire à l'axe central A et sécant avec lui, et rappelé vers une position de repos, relative par rapport au mobile central 1, par au moins un élément de rappel élastique 4, et cet axe secondaire B passe par le centre de masse de l'élément inertiel 3 qui lui est associé.According to the invention, the
Plus particulièrement, le résonateur rotatif 10 comporte une pluralité d'éléments inertiels 3, chacun agencé pour pivoter par rapport au mobile central 1 autour d'un axe secondaire B perpendiculaire à l'axe central A et sécant avec lui, et chacun rappelé vers une position de repos, relative par rapport au mobile central 1, par au moins un élément de rappel élastique 4.More particularly, the
Et chaque axe secondaire B passe par le centre de masse de l'élément inertiel 3 qui lui est associé.And each secondary axis B passes through the center of mass of the
Plus particulièrement, cet au moins un élément de rappel élastique 4 est agencé pour appliquer à l'élément inertiel 3 respectif un couple avec un moment de rappel élastique, selon la relation:
- où θ1 est l'angle d'inclinaison de l'élément inertiel 3 par rapport à sa position de repos qui est sa position d'équilibre à l'arrêt,
- où ω3 est la vitesse de rotation du mobile central 1, qui est donc la pulsation du résonateur,
- où I2 est l'inertie de l'élément inertiel 3 par rapport un axe transverse E perpendiculaire à la fois à l'axe central A et à l'axe secondaire B,
- et où I3 est l'inertie de l'élément inertiel 3 par rapport à l'axe central A.
- where θ 1 is the angle of inclination of the
inertial element 3 with respect to its rest position which is its equilibrium position at rest, - where ω 3 is the speed of rotation of the central mobile 1, which is therefore the pulsation of the resonator,
- where I 2 is the inertia of the
inertial element 3 with respect to a transverse axis E perpendicular to both the central axis A and the secondary axis B, - and where I 3 is the inertia of the
inertial element 3 with respect to the central axis A.
Plus particulièrement, ce résonateur rotatif 10 présente, dans une position de repos, une symétrie de rotation autour de l'axe central A, d'ordre N, où N est un entier, supérieur ou égal à 2.More particularly, this
Plus particulièrement, les éléments inertiels 3 que comporte le résonateur rotatif 10 sont, dans une position de repos, en symétrie de rotation autour de l'axe central A, d'ordre N, où N est un entier, supérieur ou égal à 2.More particularly, the
Plus particulièrement encore, chaque élément inertiel 3 présente une symétrie de rotation d'ordre 2 autour de son axe secondaire B.More particularly, each
Dans une variante, au moins un élément de rappel élastique 4 est fixé à une première extrémité au mobile central 1, et à une deuxième extrémité à l'élément inertiel 3.In a variant, at least one elastic return element 4 is fixed at a first end to the central mobile 1, and at a second end to the
Dans une autre variante, qui peut naturellement être combinée avec la précédente, au moins un élément de rappel élastique 4 est fixé à une première extrémité à un élément inertiel 3, et à une deuxième extrémité à un autre élément inertiel 3.In another variant, which can naturally be combined with the preceding one, at least one elastic return element 4 is fixed at one end to an
Dans une autre variante encore, visible notamment sur les
Plus particulièrement, et tel que visible sur les réalisations illustrées, non limitatives, tous les éléments inertiels 3 d'un même résonateur rotatif 10 sont agencés pour pivoter autour d'un axe secondaire B commun.More particularly, and as visible in the illustrated embodiments, not limiting, all the
Dans des variantes particulières visibles notamment aux
Dans un mode de réalisation avantageux, le résonateur rotatif 10 comporte au moins un guidage flexible, pour assurer le pivotement et le rappel élastique d'au moins un élément inertiel 3 par rapport au mobile central 1.In an advantageous embodiment, the
Ce guidage flexible peut être réalisé de différentes façons : lames flexibles ou lames à cols, agencées de façon croisée en plan, ou selon des plans parallèles et croisées en projection sur un de ces plans parallèles, ou encore agencées selon une configuration RCC (Remote Center Compliance) c'est-à-dire à centre de rotation déporté, les lames faisant un vé entre elles, ou autres.This flexible guide can be achieved in different ways: flexible blades or collared blades, arranged in a plane crosswise manner, or in parallel planes and crossed in projection on one of these parallel planes, or arranged according to a configuration RCC (Remote Center Compliance) that is to say, to offset center of rotation, the blades making a vee between them, or others.
L'utilisation de tels guidages flexibles pour réaliser la fonction de guidage rotatif et de rappel élastique permet de supprimer les frottements inhérents à un pivot traditionnel de type arbre-palier, ou similaire.The use of such flexible guides to perform the function of rotary guiding and elastic return eliminates the friction inherent in a traditional shaft-bearing pivot, or the like.
Selon le mode de réalisation, ces guidages flexibles peuvent être, ou bien rapportés sur le mobile central 1 et/ou sur un élément inertiel 3, ou être monobloc avec au moins l'un des deux, ou les deux. Les exécutions monobloc peuvent être en matériau micro-usinable, mis en oeuvre par procédé « Liga » ou « Mems » ou similaire, en matériau au moins partiellement amorphe, en silicium et oxyde de silicium, en « DLC » (diamant like carbon), ou autre.According to the embodiment, these flexible guides can be, or reported on the central mobile 1 and / or on an
Plus particulièrement, ce guidage flexible est un pivot à lames qui sont, ou croisées coplanaires, ou croisées en projection sur un plan de projection perpendiculaire à l'axe central A comme dans la réalisation de la
Il est avantageux que le centre de masse global reste fixe, et que le cumul des éventuels déplacements parasites des centres de masse individuels des éléments inertiels, lors de leur pivotement, s'annule. C'est-à-dire que le centre de masse global de tout le résonateur rotatif10 reste fixe indépendamment de l'amplitude. Ceci peut être obtenu notamment par la combinaison de la symétrie géométrique en rotation, et par le choix de guidage flexibles identiques pour tout le résonateur rotatif 10 : chaque élément inertiel 3 qui le compose est rappelé par le même guidage flexible.It is advantageous that the overall center of mass remains fixed, and that the cumulation of possible parasitic displacements of the individual centers of mass of the inertial elements, during their pivoting, is canceled. That is, the overall center of mass of the entire rotational resonator remains fixed regardless of amplitude. This can be achieved in particular by the combination of geometric symmetry in rotation, and by the choice of identical flexible guidance for the entire rotary resonator 10: each
L'utilisation des lames croisées, dans des géométries particulières, permet, encore, d'assurer que le couple de rappel provoqué par le guidage flexible sur chacun des éléments inertiels est proportionnel au sinus du double de l'angle de pivotement de cet élément inertiel 3.The use of the crossed blades, in particular geometries, makes it possible, again, to ensure that the return torque caused by the flexible guidance on each of the inertial elements is proportional to the sine of the double of the pivot angle of this inertial element. 3.
Deux agencements particuliers, nullement limitatifs, sont décrits ci-après pour exposer des moyens d'y parvenir.Two particular arrangements, in no way limiting, are described below to explain ways to achieve this.
La
La
Plus particulièrement, ce guidage flexible est compensé thermiquement.More particularly, this flexible guide is thermally compensated.
Plus particulièrement encore, ce guidage flexible comporte des lames en silicium oxydé, sur lesquelles une croissance différentielle de dioxyde de silicium lors d'un traitement thermique permet de mettre sous forte précontrainte des éléments de plus faible section, tels que des lames au sein d'un ensemble monobloc.More particularly, this flexible guide comprises blades of oxidized silicon, on which a differential growth of silicon dioxide during a heat treatment makes it possible to put under high prestressing elements of smaller section, such as blades within a monobloc set.
Dans la variante de la
Dans la variante de la
Dans la variante de la
Par exemple, le mobile de sortie du rouage 300 est une vis sans fin, agencée pour coopérer avec un pignon qui constitue le mobile d'entrée 2.For example, the mobile output of gear train 300 is a worm gear, arranged to cooperate with a pinion which constitutes the
De façon particulière, le résonateur rotatif 10 comporte seulement deux ou trois éléments inertiels 3. En effet, un compromis est à trouver entre les performances et l'encombrement, et un résonateur à deux éléments inertiels en symétrie de rotation assure les performances requises.In particular, the
Dans une variante avantageuse, le pivotement du mobile central 1 est effectué sur au moins un pivot magnétique, de façon à obtenir le meilleur rendement.In an advantageous variant, the pivoting of the central
L'invention concerne encore une montre mécanique 1000 comportant au moins un tel mouvement.The invention also relates to a
La présente invention présente des avantages importants :
- la suppression du travail du frottement des pivots d'un balancier-spiral usuel, pour augmenter le facteur de qualité du résonateur ;
- la suppression des saccades de l'échappement afin d'augmenter le rendement d'échappement ;
- l'augmentation de la réserve de marche des montres mécaniques actuelles ;
- l'augmentation de la précision des montres mécaniques actuelles.
- the elimination of the work of the friction of the pivots of a conventional balance-spring, to increase the quality factor of the resonator;
- the suppression of saccades of the exhaust in order to increase the exhaust efficiency;
- the increase in the power reserve of current mechanical watches;
- the increase of the precision of the current mechanical watches.
Pour une taille de mouvement donné, on s'attend à quintupler l'autonomie de la montre, et à doubler le pouvoir réglant de la montre. Cela revient à dire que l'invention permet un gain d'un facteur 10 sur les performances du mouvement.For a given movement size, it is expected to increase the autonomy of the watch five times, and to double the power of the watch. That is to say that the invention allows a gain of a
Claims (25)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17183211.6A EP3435173B1 (en) | 2017-07-26 | 2017-07-26 | Mechanical movement with isochronous rotary resonator, which is not position-sensitive |
CH00968/17A CH714019A2 (en) | 2017-07-26 | 2017-07-26 | Mechanical clockwork movement with rotary resonator. |
JP2018133946A JP6676708B2 (en) | 2017-07-26 | 2018-07-17 | Mechanical movement with isochronous, position-independent rotary resonator |
US16/039,828 US10927824B2 (en) | 2017-07-26 | 2018-07-19 | Mechanical movement with rotary resonator, which is isochronous and positionally insensitive |
RU2018127092A RU2687510C1 (en) | 2017-07-26 | 2018-07-24 | Mechanical clock mechanism with rotary resonator, which is isochronous and is not sensitive to location |
CN201810825408.0A CN109307998B (en) | 2017-07-26 | 2018-07-25 | Mechanical movement with synchronous and position-insensitive rotary resonator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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EP17183211.6A EP3435173B1 (en) | 2017-07-26 | 2017-07-26 | Mechanical movement with isochronous rotary resonator, which is not position-sensitive |
Publications (2)
Publication Number | Publication Date |
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EP3435173A1 true EP3435173A1 (en) | 2019-01-30 |
EP3435173B1 EP3435173B1 (en) | 2020-04-29 |
Family
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Family Applications (1)
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EP17183211.6A Active EP3435173B1 (en) | 2017-07-26 | 2017-07-26 | Mechanical movement with isochronous rotary resonator, which is not position-sensitive |
Country Status (6)
Country | Link |
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US (1) | US10927824B2 (en) |
EP (1) | EP3435173B1 (en) |
JP (1) | JP6676708B2 (en) |
CN (1) | CN109307998B (en) |
CH (1) | CH714019A2 (en) |
RU (1) | RU2687510C1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3812843A1 (en) * | 2019-10-25 | 2021-04-28 | ETA SA Manufacture Horlogère Suisse | Flexible guide and set of stacked flexible guides for rotary resonator mechanism, in particular for a clock movement |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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EP3992729A1 (en) * | 2020-10-29 | 2022-05-04 | The Swatch Group Research and Development Ltd | Flexible guide with translation table for rotary resonator mechanism, in particular for a timepiece movement |
EP4009113A1 (en) * | 2020-12-02 | 2022-06-08 | The Swatch Group Research and Development Ltd | Flexible guide assembly for rotary resonator mechanism, in particular for a timepiece movement |
Citations (2)
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FR630831A (en) * | 1924-04-28 | 1927-12-09 | Method and arrangement for transmitting power between mechanical systems and for controlling mechanical systems | |
CH293180A (en) * | 1951-08-18 | 1953-09-15 | Martenet Louis | Centrifugal regulator for timepiece. |
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CH421827A (en) * | 1964-07-31 | 1967-04-15 | Centre Electron Horloger | Mechanical resonator for normal frequency oscillators in timing devices |
CH699081A2 (en) * | 2008-07-04 | 2010-01-15 | Swatch Group Res & Dev Ltd | High and low frequency resonator assembly for timepiece i.e. watch, has balance spring arranged between square inertial masses for coupling high and low frequency resonators, where inertial masses are constituted by respective balances |
DE602008006057D1 (en) * | 2008-07-04 | 2011-05-19 | Swatch Group Res & Dev Ltd | Coupled resonators for clock |
CH702843B1 (en) * | 2010-03-17 | 2014-08-29 | Complitime Sa | Movement for timepiece to remontoir. |
JP2015143673A (en) * | 2013-12-27 | 2015-08-06 | セイコーインスツル株式会社 | Balance with hairspring, movement, and timepiece |
CH710115A2 (en) * | 2014-09-09 | 2016-03-15 | Swatch Group Res & Dev Ltd | Mobile module for synchronization of clock of the same frequency resonators. |
CH710692B1 (en) * | 2015-02-03 | 2021-09-15 | Eta Sa Mft Horlogere Suisse | Clockwork oscillator mechanism. |
EP3054356B1 (en) * | 2015-02-03 | 2017-12-13 | ETA SA Manufacture Horlogère Suisse | Isochronous clock resonator |
US9983549B2 (en) * | 2015-02-03 | 2018-05-29 | Eta Sa Manufacture Horlogere Suisse | Isochronous timepiece resonator |
CH713069A2 (en) * | 2016-10-25 | 2018-04-30 | Eta Sa Mft Horlogere Suisse | Mechanical watch with rotary isochronous resonator, insensitive to positions. |
-
2017
- 2017-07-26 CH CH00968/17A patent/CH714019A2/en unknown
- 2017-07-26 EP EP17183211.6A patent/EP3435173B1/en active Active
-
2018
- 2018-07-17 JP JP2018133946A patent/JP6676708B2/en active Active
- 2018-07-19 US US16/039,828 patent/US10927824B2/en active Active
- 2018-07-24 RU RU2018127092A patent/RU2687510C1/en active
- 2018-07-25 CN CN201810825408.0A patent/CN109307998B/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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FR630831A (en) * | 1924-04-28 | 1927-12-09 | Method and arrangement for transmitting power between mechanical systems and for controlling mechanical systems | |
CH293180A (en) * | 1951-08-18 | 1953-09-15 | Martenet Louis | Centrifugal regulator for timepiece. |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3812843A1 (en) * | 2019-10-25 | 2021-04-28 | ETA SA Manufacture Horlogère Suisse | Flexible guide and set of stacked flexible guides for rotary resonator mechanism, in particular for a clock movement |
US11693366B2 (en) | 2019-10-25 | 2023-07-04 | Eta Sa Manufacture Horlogère Suisse | Flexible guide and set of superimposed flexible guides for rotary resonator mechanism, in particular of a horological movement |
Also Published As
Publication number | Publication date |
---|---|
CN109307998A (en) | 2019-02-05 |
JP2019039908A (en) | 2019-03-14 |
US10927824B2 (en) | 2021-02-23 |
US20190032644A1 (en) | 2019-01-31 |
CH714019A2 (en) | 2019-01-31 |
JP6676708B2 (en) | 2020-04-08 |
EP3435173B1 (en) | 2020-04-29 |
CN109307998B (en) | 2020-09-15 |
RU2687510C1 (en) | 2019-05-14 |
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