EP2877900B1 - Time piece wheel with flexible tooth set - Google Patents
Time piece wheel with flexible tooth set Download PDFInfo
- Publication number
- EP2877900B1 EP2877900B1 EP13733311.8A EP13733311A EP2877900B1 EP 2877900 B1 EP2877900 B1 EP 2877900B1 EP 13733311 A EP13733311 A EP 13733311A EP 2877900 B1 EP2877900 B1 EP 2877900B1
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- EP
- European Patent Office
- Prior art keywords
- wheel
- hooking means
- spoke
- toothing
- hook
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000007246 mechanism Effects 0.000 description 3
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- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- XQYAEIDOJUNIGY-UHFFFAOYSA-N (2-iodo-5-methoxyphenyl)boronic acid Chemical compound COC1=CC=C(I)C(B(O)O)=C1 XQYAEIDOJUNIGY-UHFFFAOYSA-N 0.000 description 1
- 229920000297 Rayon Polymers 0.000 description 1
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- 229910003460 diamond Inorganic materials 0.000 description 1
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- G04B13/00—Gearwork
- G04B13/02—Wheels; Pinions; Spindles; Pivots
- G04B13/027—Wheels; Pinions; Spindles; Pivots planar toothing: shape and design
Definitions
- the invention relates to a clock wheel with flexible teeth, comprising a plurality of spokes each having at least one tooth at the distal end of a flexible arm and protruding from a hub about a pivot axis of said wheel. .
- the invention also relates to a gear train comprising such a wheel.
- the invention also relates to a movement comprising such a cog.
- the invention also relates to a watch comprising such a movement.
- the invention relates to the field of clockwork mechanisms comprising a gear train.
- VDO ADOLF SCHINDLING describes a quartz watch gear with radial slots separating teeth or groups of teeth.
- the document WO 2012/037593 A2 in the name of MIBA SINTER AUSTRIA GmbH further describes a wheel with a differentiated performance of the teeth in the direction of the thickness of the wheel board.
- This wheel comprises several materials of different elasticities.
- the invention proposes to equip the clock wheels with flexible teeth of improvements to give them a higher resistance to deformation during handling, and improve their impact resistance.
- the principle is the distribution of forces greater than those associated with normal walking between the tooth (or teeth) in meshing, with the teeth that precede it and / or follow it.
- the invention relates, in a first embodiment, to a clock wheel with flexible teeth, comprising a plurality of spokes each having at least one tooth at the distal end of a flexible and projecting arm.
- a hub about a pivot axis of said wheel, characterized in that each said spoke comprises attachment means or complementary attachment means, which are arranged to cooperate respectively, in traction or thrust contact, with said complementary attachment means or said attachment means that comprises a said immediately adjacent radius, in certain bending positions of at least one of said arms of at least one of said adjacent radii, for distributing the bending forces between a said radius of which said arm is flexed, and at least one of its said neighboring rays.
- the invention also relates to a clock wheel with flexible teeth, comprising a plurality of spokes each having at least one tooth at the distal end of a flexible arm and protruding from a hub around a pivoting axis of said wheel, characterized in that each said radius comprises hooking means and complementary hooking means, which are arranged to cooperate respectively, in traction or thrust contact, with said means for complementary attachment or said attachment means that includes a said immediately adjacent radius, in certain bending positions of at least one of said arms of at least one of said neighboring radii, for distributing the bending forces between a said radius said arm is bent, and at least one of said neighboring rays.
- the invention also relates to a watchwheel comprising at least one such wheel.
- the invention also relates to such a clockwork movement comprising at least one such wheel.
- the invention also relates to a watch comprising at least one such movement.
- the invention relates to the field of clockwork mechanisms comprising a wheel, and, in particular, the wheels with flexible teeth.
- the invention is applicable to different wheel geometries, of which only a non-limiting example is illustrated in the figures.
- the invention is, in particular and not limited to, applicable to wheels made according to processes of the "MEMS", “LIGA ⁇ " or similar type, and / or in materials such as silicon, or its oxides, or mono diamond. or polycrystalline, or the like.
- the principle of the invention consists in the distribution of forces greater than those associated with normal walking between the tooth (or teeth) in meshing, with the teeth that precede and / or follow.
- the invention relates to a clock wheel 1 with flexible teeth, having a plurality of spokes 2.
- Each spoke 2 comprises at least one tooth 3 at the distal end of a flexible arm 4.
- This flexible arm 4 is protruding from a hub 5 about a pivot axis D of the wheel 1, either radially as shown in the figures, or according to a particular profile, arc or curve, or S-shaped profile, or other.
- the wheel 1 comprises a plurality of such teeth 10 different from each other, coplanar in the same plane P perpendicular to the pivot axis D, and arranged alternately with each other.
- a wheel 1 with at least two different teeth including a first toothing 11 and a second toothing 12, is common in the known watchmaking achievements, which is why it is illustrated in more detail.
- the figure 2 shows a general case with two sets of teeth 11 and 12, the first toothing has teeth 31A to 31F carried by arms 41A to 41F, the second toothing of teeth 32A to 32F carried by arms 42A to 42F.
- the wheel 1 has a single toothing 10, with 2 all identical spokes.
- these spokes 2 are arranged with a constant angular pitch at the periphery of the wheel 1.
- each spoke 2 comprises attachment means 6 and complementary attachment means 7, which are arranged to cooperate respectively with complementary attachment means 7 and / or attachment means 6 that comprise a other radius 2 immediately next door.
- These attachment means 6 and complementary gripping means 7 of two adjacent spokes cooperate in pulling or pushing contact, in certain bending positions of at least one of the arms 4 of at least one of these two neighboring spokes 2 , to distribute the bending forces between a radius 2 whose arm 4 is flexed, and at least one of its neighboring radii 2.
- the attachment means 6 of a radius and the complementary attachment means 7 of the neighboring radius are not in contact with each other, and are separated by a clearance corresponding at least to the flexion normal arms 4 of these spokes during the transmission of energy between the wheel 1 and a counter wheel 50.
- the hooking cooperation can thus be between firstly a first radius 2 subjected to a disturbance resulting in a large flexion of its arm 4, in particular during an impact on at least one of the two wheels 1, 50, and other from a second radius 2AM upstream and / or a third radius 2AV downstream of the first radius.
- the latching cooperation can still be done with other rays, upstream of the second upstream beam 2AM, and / or downstream of the third downstream radius 2AV.
- this toothing 10 or each toothing 10 if there are several, comprises a plurality of teeth 30 identical to each other and distributed equidistantly at the periphery of the wheel 1.
- At least one toothing 10 comprises a plurality of radii 20 which are identical to one another and distributed equidistantly around the wheel 1.
- the wheel 1 comprises a plurality of teeth 10 different from each other, coplanar in the same plane P perpendicular to the pivot axis D of the wheel 1, and arranged alternately with each other.
- the figures illustrate the example of a first toothing 11 and a second toothing 12, it is nevertheless possible that the wheel 1 has a greater diversity of teeth distributed over its periphery.
- the wheel 1 according to the invention is designed to transmit the effect of a disturbance applied in any direction or direction to one or more of its spokes 2.
- the attachment means 6 and the complementary fastening means 7 are advantageously designed to work both in tension, in which case they cooperate in a real driving engagement relationship, in compression, in which case they cooperate in abutment abutment with an opposing zone of the radius 2 adjacent, this antagonistic zone may consist in the attachment means 6 and the complementary attachment means 7 of the neighboring radius, and / or in the arm 4 of the neighboring radius, and / or in a tooth 3 of the neighboring radius.
- the attachment means 6 and the complementary attachment means 7 are arranged to cooperate together in tension, for driving a first radius 21 of a first toothing 11 by a second radius 22 adjacent to the first radius 21 and having a second toothing 12.
- the attachment means 6 and the complementary attachment means 7 are arranged to cooperate abutting abutment, together and / or with the adjacent radius 20, at abutment abutment surfaces that they comprise, during the approximation of a first radius 21 of a first toothing 11 and a second radius 22 adjacent the first radius 21 and that comprises a second toothing 12.
- the attachment means 6 and the complementary attachment means 7 of the different adjacent rays 2 cooperate similarly in abutment abutment between neighboring rays 2.
- each spoke 2 comprises, on either side of its arm 4, on the one hand hooking means 6, and on the other hand complementary fastening means 7.
- the attachment means 6 of each spoke 2 are located on a first so-called upstream side
- the complementary attachment means 7 are located on a second said downstream side of the arm 4.
- each spoke 20, 21, 22 , of each toothing 10, 11, 12 comprises, on either side of an arm 40, 41, 42, hooking means 60, 61, 62, and complementary attachment means 70, 71, 72.
- all the teeth 2 of the wheel 1 are all of the same pitch diameter DP, and the various gripping means 6 and complementary gripping means 7 cooperate with each other in an annular zone of maximum diameter less than the pitch diameter DP.
- the attachment means 6 or / and the complementary attachment means 7 are constituted by at least one hook 8 secured to the arm 4 that includes the radius 2 carrying the attachment means 6 or additional attachment means 7.
- This hook 8 comprises a distal segment 9 which is preferably substantially radial with respect to the pivot axis D, and which carries a outer surface 91 compression abutment bearing and an inner surface 92 of traction support.
- the radius 2 is carrying the attachment means 6 and complementary attachment means 7, in the form of a first hook 86 and a second hook 87 respectively, referenced on the figure 2 : 861 for the first hook of the first toothing 11, 862 for the first hook of the second toothing 12, 871 for the second hook of the first toothing 11, 872 for the second hook of the second toothing 12.
- the first hook 86 and the second hook 87 each comprise a distal segment 96, 97, substantially radial with respect to the pivot axis D, which distal segments 96, 97 are directed on the same side, or towards the outside of the wheel 1 for those of the second toothing 12, or towards the pivot axis D for those of the first toothing 11.
- first hook 86 and the second hook 87 each comprise a distal segment 96, 97, substantially radial with respect to the pivot axis D, which distal segments 96, 97 are directed in the opposite direction, one towards the the outside of the wheel 1 and the other towards the pivot axis D.
- This embodiment allows for all 2 identical radii.
- first hook 86 and the second hook 87 are carried by a single crosspiece 43 substantially perpendicular to the arm 4, called 431 for the first toothing 11 and 432 for the second toothing 12.
- first hook 86 and the second hook 87 are each carried by a cross member 44, 46, substantially perpendicular to the arm 4.
- first hook 86 and the second hook 87 are carried by the tooth 3 of the radius concerned at the outer end of the arm 4.
- the figures 3 and 5 illustrate the same mechanism, first in normal meshing, then in a shock simulated by an arrow and the abrupt displacement, in dotted line, of a tooth 51 of a wheel 50 antagonist of the wheel 1.
- This tooth 51 causes the tooth 31A of the radius 2, which causes, by traction, the radius 2AM immediately upstream, a first inner surface 65 of the hook 861 resulting in a third inner surface 67 of the hook 872.
- the spoke 2 causes again, by pushing, the radius 2AV immediately downstream, by pressing a fourth external surface 68 on an arm bearing surface 69 of the arm 42N, and / or by pressing an arm bearing surface 69 of its arm 41A on a second outer surface 66 of the downstream beam 2AV.
- the figure 5 represents the variant of the figure 3 during a shock applied to an opposing wheel.
- the stops work essentially with the teeth out of engagement.
- An advantage of the invention is that the stops ensure that the following teeth, during bending, mesh correctly on the next tooth, with entry into the toothing without bracing, which guarantees the pitch of the toothing during the bending of teeth.
- FIGs 7 and 8 represent a gear train with a flexible gear wheel according to the variant of the figure 1 , in this case preferably a wheel of second, where are highlighted by arrows the contact points P, and where the figure 8 is represented with more arming than the figure 7 , which is visualized by the upper flexion of the arms 4.
- all the arms 4 of the spokes 2 that includes the wheel 1 are angularly equidistant.
- the teeth 3 carried by these arms 4 may however not be equidistant, this is the case of figures 1 , 3 and 5 where the teeth 3 are offset relative to the arms 4, as visible on the figure 3 where it can be seen that each vertex 34 of tooth 3 is offset relative to the extension point 33 of the arm 4, this offset being made alternately in the upstream and downstream direction, so that the distances between tooth tops are different two two, and alternating between a small inter-tooth space and a large inter-tooth space.
- the teeth 2 are all of the same pitch diameter DP, and the distances measured on the pitch pitch circle DP between two successive teeth are different two by two.
- the figure 2 illustrates a case where neither the arms 4 nor the teeth 3 are equidistant, but are in pairs periodically on the periphery of the wheel.
- the pitch of the toothing of the wheel 1 varies between a first tooth and a second successive tooth, between a smaller pitch which is smaller than the theoretical pitch for meshing with an opposing mobile. given, and a greater step that is greater than this theoretical step, the total of this smallest step and this greatest step being equal to twice this theoretical step.
- each first tooth and each second tooth is placed on a flexible arm attached to a hub of the wheel 1.
- Each second tooth is a flexible tooth.
- a first distance is measured on the first pitch circle between the first tooth and the second tooth of the same pair formed by a first tooth and a second tooth.
- a second distance is measured on the first pitch circle between a first and second adjacent tooth but belonging to different and consecutive pairs. In a variant, this first distance is different from this second distance.
- the invention also relates to a clockwork train 100 comprising at least one such wheel 1, in combination with at least one counter-wheel 50.
- figure 3 shows the relative displacement between the wheel 1 and the counter-wheel 50, each tooth 51 can occupy, because of the mechanical clearances in the different pivots, two extreme relative positions 52 and 53, corresponding to extreme virtual primitive circles DP2 and DP3.
- the wheel 1 with flexible teeth has the advantage of allowing these variations of center distance, thanks to the bending of each of its spokes 2. This is also the reason why, in the free state, the attachment means 6 of a radius and the complementary gripping means 7 of the adjacent radius are preferably separated by a clearance greater than or equal to the displacement caused by these normal variations of center distance.
- the invention also relates to a watch movement 200 comprising at least one said wheel 100.
- the invention also relates to a watch 300 comprising at least one movement 200.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Gears, Cams (AREA)
- Electromechanical Clocks (AREA)
Description
L'invention concerne une roue d'horlogerie à denture flexible, comportant une pluralité de rayons comportant chacun au moins une dent à l'extrémité distale d'un bras flexible et saillant d'un moyeu autour d'un axe de pivotement de ladite roue.The invention relates to a clock wheel with flexible teeth, comprising a plurality of spokes each having at least one tooth at the distal end of a flexible arm and protruding from a hub about a pivot axis of said wheel. .
L'invention concerne encore un rouage comportant une telle roue.The invention also relates to a gear train comprising such a wheel.
L'invention concerne encore un mouvement comportant un tel rouage.The invention also relates to a movement comprising such a cog.
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 mécanismes d'horlogerie comportant un rouage.The invention relates to the field of clockwork mechanisms comprising a gear train.
Le document
L'avènement de nouvelles technologies, telles les fabrications de type « MEMS » et « LIGA ©», et de nouveaux matériaux, tel le silicium, ont permis de développer des roues d'horlogerie entièrement ou partiellement flexibles, ce qui permet la conception de roues à rattrapage de jeu, et garantissant l'obtention de bons rendements grâce à des pertes par frottement minimales.The advent of new technologies, such as "MEMS" and "LIGA ©" type fabrications, and new materials, such as silicon, have made it possible to develop fully or partially flexible watch wheels, which allows the design of gaming wheels, and guaranteeing good yields thanks to minimal friction losses.
Le document
Toutefois, ces roues, qui comportent souvent de fines lames flexibles, ont une résistance limitée en service, en raison des chocs inévitables sur des montres, ou des contraintes apportées par les manipulations de l'horloger, par exemple lors de la pose des aiguilles, et dont l'intensité peut aller au-delà de la résistance d'une telle lame.However, these wheels, which often have thin flexible blades, have a limited resistance in service, because of unavoidable shocks on watches, or constraints brought by the manipulations of the watchmaker, for example during the installation of the needles, and whose intensity can go beyond the resistance of such a blade.
L'invention se propose de doter les roues d'horlogerie à denture flexible de perfectionnements afin de leur apporter une résistance plus élevée à la déformation lors des manipulations, et d'améliorer leur résistance aux chocs.The invention proposes to equip the clock wheels with flexible teeth of improvements to give them a higher resistance to deformation during handling, and improve their impact resistance.
Le principe est la répartition d'efforts supérieurs à ceux liés à la marche normale entre la dent (ou les dents) en cours d'engrènement, avec les dents qui la précèdent ou/et la suivent.The principle is the distribution of forces greater than those associated with normal walking between the tooth (or teeth) in meshing, with the teeth that precede it and / or follow it.
A cet effet, l'invention concerne, dans un premier mode de réalisation, une roue d'horlogerie à denture flexible, comportant une pluralité de rayons comportant chacun au moins une dent à l'extrémité distale d'un bras flexible et saillant d'un moyeu autour d'un axe de pivotement de ladite roue, caractérisée en ce que chaque dit rayon comporte des moyens d'accrochage ou des moyens d'accrochage complémentaire, lesquels sont agencés pour coopérer respectivement, en contact de traction ou de poussée, avec des dits moyens d'accrochage complémentaire ou des dits moyens d'accrochage que comporte un dit rayon immédiatement voisin, dans certaines positions de flexion d'au moins un des dits bras d'au moins un desdits rayons voisins, pour répartir les efforts de flexion entre un dit rayon dont ledit bras est fléchi, et au moins un de ses dits rayons voisins.For this purpose, the invention relates, in a first embodiment, to a clock wheel with flexible teeth, comprising a plurality of spokes each having at least one tooth at the distal end of a flexible and projecting arm. a hub about a pivot axis of said wheel, characterized in that each said spoke comprises attachment means or complementary attachment means, which are arranged to cooperate respectively, in traction or thrust contact, with said complementary attachment means or said attachment means that comprises a said immediately adjacent radius, in certain bending positions of at least one of said arms of at least one of said adjacent radii, for distributing the bending forces between a said radius of which said arm is flexed, and at least one of its said neighboring rays.
Dans un deuxième mode de réalisation, l'invention concerne encore une roue d'horlogerie à denture flexible, comportant une pluralité de rayons comportant chacun au moins une dent à l'extrémité distale d'un bras flexible et saillant d'un moyeu autour d'un axe de pivotement de ladite roue, caractérisée en ce que chaque dit rayon comporte des moyens d'accrochage et des moyens d'accrochage complémentaire, lesquels sont agencés pour coopérer respectivement, en contact de traction ou de poussée, avec des dits moyens d'accrochage complémentaire ou des dits moyens d'accrochage que comporte un dit rayon immédiatement voisin, dans certaines positions de flexion d'au moins un des dits bras d'au moins un desdits rayons voisins, pour répartir les efforts de flexion entre un dit rayon dont ledit bras est fléchi, et au moins un de ses dits rayons voisins.In a second embodiment, the invention also relates to a clock wheel with flexible teeth, comprising a plurality of spokes each having at least one tooth at the distal end of a flexible arm and protruding from a hub around a pivoting axis of said wheel, characterized in that each said radius comprises hooking means and complementary hooking means, which are arranged to cooperate respectively, in traction or thrust contact, with said means for complementary attachment or said attachment means that includes a said immediately adjacent radius, in certain bending positions of at least one of said arms of at least one of said neighboring radii, for distributing the bending forces between a said radius said arm is bent, and at least one of said neighboring rays.
L'invention concerne encore un rouage d'horlogerie comportant au moins une telle roue.The invention also relates to a watchwheel comprising at least one such wheel.
L'invention concerne encore un tel mouvement d'horlogerie comportant au moins un tel rouage.The invention also relates to such a clockwork movement comprising at least one such wheel.
L'invention concerne encore une montre comportant au moins un tel mouvement.The invention also relates to a watch comprising at least one such 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 vue en plan, une partie d'un rouage comportant une roue à denture flexible selon un premier mode de réalisation de l'invention, en position d'engrènement avec une autre roue ; - la
figure 2 représente, de façon schématisée et en vue de face, une roue à denture flexible selon ce premier mode de réalisation, comportant une première denture et une deuxième denture disposées en alternance l'une avec l'autre ; - la
figure 3 est un détail de lafigure 1 , en fonctionnement normal ; - la
figure 4 représente, de façon similaire à lafigure 3 , une roue selon un deuxième mode de réalisation de l'invention ; - la
figure 5 représente la variante de lafigure 3 , lors d'un choc appliqué à une roue antagoniste ; - la
figure 6 représente, de façon similaire à lafigure 3 , une variante de roue selon le deuxième mode de réalisation avec une denture unique dont tous les rayons sont identiques ; - les
figures 7 et 8 représentent un rouage avec une roue à denture flexible selon le premier mode de réalisation de lafigure 1 , où sont mis en évidence par des flèches les points de contact, et où lafigure 8 est représentée avec davantage d'armage que lafigure 7 ; - la
figure 9 représente, sous forme d'un schéma-blocs, une montre comportant un mouvement incorporant un rouage avec une roue selon l'invention.
- the
figure 1 shows, schematically and in plan view, a part of a gear train comprising a flexible gear wheel according to a first embodiment of the invention, in meshing position with another wheel; - the
figure 2 shows, schematically and in front view, a flexible gear wheel according to this first embodiment, having a first toothing and a second toothing arranged alternately with each other; - the
figure 3 is a detail of thefigure 1 , in normal operation; - the
figure 4 represents, similarly to thefigure 3 a wheel according to a second embodiment of the invention; - the
figure 5 represents the variant of thefigure 3 during an impact applied to an opposing wheel; - the
figure 6 represents, similarly to thefigure 3 a wheel variant according to the second embodiment with a single toothing of which all the spokes are identical; - the
Figures 7 and 8 represent a gear train with a flexible gear wheel according to the first embodiment of the invention.figure 1 , where are highlighted by arrows the points of contact, and where thefigure 8 is represented with more arming than thefigure 7 ; - the
figure 9 represents, in the form of a block diagram, a watch comprising a movement incorporating a gear train with a wheel according to the invention.
L'invention concerne le domaine des mécanismes d'horlogerie comportant un rouage, et, tout particulièrement, les roues à denture flexible.The invention relates to the field of clockwork mechanisms comprising a wheel, and, in particular, the wheels with flexible teeth.
L'invention est applicable à différentes géométries de roues, dont seul un exemple non limitatif est illustré sur les figures. L'invention est, en particulier et non limitativement, applicable aux roues réalisées selon des procédés de type « MEMS », « LIGA ©», ou similaires, ou/et en matériaux tel le silicium, ou ses oxydes, ou le diamant mono- ou poly-cristallin, ou similaire.The invention is applicable to different wheel geometries, of which only a non-limiting example is illustrated in the figures. The invention is, in particular and not limited to, applicable to wheels made according to processes of the "MEMS", "LIGA ©" or similar type, and / or in materials such as silicon, or its oxides, or mono diamond. or polycrystalline, or the like.
Le principe de l'invention consiste dans la répartition d'efforts supérieurs à ceux liés à la marche normale entre la dent (ou les dents) en cours d'engrènement, avec les dents qui la précèdent ou/et la suivent.The principle of the invention consists in the distribution of forces greater than those associated with normal walking between the tooth (or teeth) in meshing, with the teeth that precede and / or follow.
Ainsi, l'invention concerne une roue d'horlogerie 1 à denture flexible, comportant une pluralité de rayons 2. Chaque rayon 2 comporte au moins une dent 3 à l'extrémité distale d'un bras 4 flexible. Ce bras flexible 4 est saillant d'un moyeu 5 autour d'un axe de pivotement D de la roue 1, soit radialement comme représenté sur les figures, soit selon un profil particulier, en arc de cercle ou de courbe, ou en profil en S, ou autre.Thus, the invention relates to a
Dans une application particulière, selon un premier mode de réalisation illustré sur les
Dans une autre application, selon un deuxième mode de réalisation illustré sur les
Selon l'invention, chaque rayon 2 comporte des moyens d'accrochage 6 et des moyens d'accrochage complémentaire 7, qui sont agencés pour coopérer respectivement avec des moyens d'accrochage complémentaire 7 ou/et des moyens d'accrochage 6 que comporte un autre rayon 2 immédiatement voisin. Ces moyens d'accrochage 6 et moyens d'accrochage complémentaire 7 de deux rayons voisins coopèrent en contact de traction ou de poussée, dans certaines positions de flexion d'au moins un des bras 4 d'au moins un de ces deux rayons 2 voisins, pour répartir les efforts de flexion entre un rayon 2 dont le bras 4 est fléchi, et au moins un de ses rayons 2 voisins.According to the invention, each
De préférence, à l'état libre, les moyens d'accrochage 6 d'un rayon et les moyens d'accrochage complémentaire 7 du rayon voisin ne sont pas en contact entre eux, et sont séparés par un jeu correspondant au moins à la flexion normale des bras 4 de ces rayons au cours de la transmission d'énergie entre la roue 1 et une roue antagoniste 50.Preferably, in the free state, the attachment means 6 of a radius and the complementary attachment means 7 of the neighboring radius are not in contact with each other, and are separated by a clearance corresponding at least to the flexion
La coopération d'accrochage peut ainsi se faire entre d'une part un premier rayon 2 soumis à une perturbation se traduisant par une flexion importante de son bras 4, notamment lors d'un choc sur au moins une des deux roues 1, 50, et d'autre part un deuxième rayon 2AM en amont ou/et un troisième rayon 2AV en aval du premier rayon. Selon l'ampleur de la perturbation et donc du fléchissement du premier rayon, la coopération d'accrochage peut encore se faire avec d'autres rayons, en amont du deuxième rayon amont 2AM, ou/et en aval du troisième rayon aval 2AV.The hooking cooperation can thus be between firstly a
Cette coopération en contact d'accrochage de rayons 2 les uns avec les autres, dans certaines positions de flexion de leurs bras 4, permet ainsi de répartir les efforts de flexion sur les rayons 2 voisins de celui ou ceux dont le bras 4 a fléchi.This cooperation in contact with two
Dans une réalisation particulière et préférée illustrée par les figures, mais non limitative, cette denture 10, ou chaque denture 10 s'il y en a plusieurs, comporte une pluralité de dents 30 identiques entre elles et réparties de façon équidistante à la périphérie de la roue 1.In a particular and preferred embodiment illustrated by the figures, but not limited to, this toothing 10, or each toothing 10 if there are several, comprises a plurality of
Dans une réalisation particulière et préférée illustrée par les figures, mais non limitative, au moins une denture 10 comporte une pluralité de rayons 20 identiques entre eux et répartis de façon équidistante autour de la roue 1.In a particular and preferred embodiment illustrated by the figures, but not limited to, at least one
Dans le premier mode de réalisation visible sur les
De façon préférée, la roue 1 selon l'invention est conçue pour transmettre l'effet d'une perturbation appliquée dans une direction ou un sens quelconque à une ou à plusieurs de ses rayons 2. Aussi de préférence les moyens d'accrochage 6 et les moyens d'accrochage complémentaire 7 sont avantageusement conçus pour travailler aussi bien en traction, auquel cas ils coopèrent dans une véritable relation d'accrochage d'entraînement, qu'en compression, auquel cas ils coopèrent en appui de butée avec une zone antagoniste du rayon 2 voisin, cette zone antagoniste pouvant consister dans les moyens d'accrochage 6 et les moyens d'accrochage complémentaire 7 du rayon voisin, ou/et dans le bras 4 du rayon voisin, ou/et dans une dent 3 du rayon voisin.Preferably, the
Tel que visible sur les
Dans le cas d'une denture 10 unique, comme sur le deuxième mode de réalisation des
Avantageusement, dans le cas des
De façon préférée, chaque rayon 2 comporte, de part et d'autre de son bras 4, d'une part des moyens d'accrochage 6, et d'autre part des moyens d'accrochage complémentaire 7. Par convention par rapport aux figures, les moyens d'accrochage 6 de chaque rayon 2 sont situés d'un premier côté dit amont, et les moyens d'accrochage complémentaire 7 sont situés d'un deuxième côté dit aval du bras 4. Ainsi chaque rayon 20, 21, 22, de chaque denture 10, 11, 12, comporte, de part et d'autre d'un bras 40, 41, 42, des moyens d'accrochage 60, 61, 62, et des moyens d'accrochage complémentaire 70, 71, 72.Preferably, each spoke 2 comprises, on either side of its
De préférence, toutes les dents 2 de la roue 1 sont toutes de même diamètre primitif DP, et les différents moyens d'accrochage 6 et moyens d'accrochage complémentaire 7 coopèrent entre eux dans une zone annulaire de diamètre maximal inférieur au diamètre primitif DP.Preferably, all the
Dans une réalisation avantageuse illustrée par les
Ce crochet 8 comporte un segment distal 9 qui est de préférence sensiblement radial par rapport à l'axe de pivotement D, et qui est porteur d'une surface externe 91 d'appui de butée en compression et d'une surface interne 92 d'appui en traction.This
De préférence, le rayon 2 est porteur des moyens d'accrochage 6 et des moyens d'accrochage complémentaire 7, sous la forme respectivement d'un premier crochet 86 et d'un deuxième crochet 87, référencés sur la
Dans le cas des
Dans le cas des
Dans le cas des
Dans le cas des
Dans une autre réalisation non illustrée par les figures, le premier crochet 86 et le deuxième crochet 87 sont portés par la dent 3 du rayon concerné à l'extrémité extérieure du bras 4.In another embodiment not illustrated by the figures, the
Les
La
Un avantage de l'invention est que les butées garantissent que les dents suivantes, lors de la flexion, engrènent correctement sur la dent suivante, avec entrée dans la denture sans arc-boutement, ce qui garantit le pas de la denture lors des flexions de dents.An advantage of the invention is that the stops ensure that the following teeth, during bending, mesh correctly on the next tooth, with entry into the toothing without bracing, which guarantees the pitch of the toothing during the bending of teeth.
Les
Dans une réalisation particulière, tel que visible sur les
La
Dans une variante particulière, le pas de la denture de la roue 1 varie entre une première dent et une deuxième dent successives, entre un plus petit pas qui est plus petit que le pas théorique pour l'engrènement avec un mobile antagoniste donné, et un plus grand pas qui est plus grand que ce pas théorique, le total de ce plus petit pas et de ce plus grand pas étant égal au double de ce pas théorique. Et chaque première dent et chaque deuxième dent est placée sur un bras souple rattaché à un moyeu de la roue 1. Chaque deuxième dent est une dent flexible. Une première distance est mesurée sur le premier cercle primitif entre la première dent et la deuxième dent d'une même paire formée d'une première dent et d'une deuxième dent. Une deuxième distance est mesurée sur le premier cercle primitif entre une première dent et une deuxième dent adjacentes mais appartenant à des paires différentes et consécutives. Dans une variante, cette première distance est différente de cette deuxième distance.In a particular variant, the pitch of the toothing of the
L'invention concerne encore un rouage d'horlogerie 100 comportant au moins une telle roue 1, en combinaison avec au moins une roue antagoniste 50. La
L'invention concerne encore un mouvement d'horlogerie 200 comportant au moins un dit rouage 100.The invention also relates to a
L'invention concerne encore une montre 300 comportant au moins un mouvement 200.The invention also relates to a
L'application de l'invention à des roues à denture flexible, en particulier réalisées, comme illustrées sur les figures, avec des moyens d'accrochage sous forme de crochets, permet de répartir sur plusieurs dents de la denture un effort appliqué localement, sur une seule dent ou au maximum sur deux dents de cette denture. La sollicitation de chaque dent est donc fortement réduite, et la résistance de la roue aux manipulations et aux chocs est améliorée, sans nuire à ses propriétés de rattrapage de jeu et ses qualités de rendement. Les crochets entre les dents renforcent l'effet de butée entre les dents, et permettent de répartir les forces de flexion, non seulement sur les dents précédentes, mais également sur les suivantes.The application of the invention to flexible toothed wheels, in particular made, as illustrated in the figures, with fastening means in the form of hooks, allows to distribute on several teeth of the toothing a force applied locally, on a single tooth or at most on two teeth of this toothing. The biasing of each tooth is greatly reduced, and the resistance of the wheel to handling and shock is improved, without impairing its play catching properties and performance qualities. The hooks between the teeth reinforce the abutment effect between the teeth, and allow to distribute the bending forces, not only on the previous teeth, but also on the following ones.
Claims (22)
- Timepiece wheel (1) comprising at least one flexible toothing, each toothing including a plurality of spokes (2), each including at least one tooth (3) at the distal end of a flexible arm (4) protruding from a hub (5) about a pivot axis (D) of said wheel (1), characterized in that each said spoke (2) includes hooking means (6) or complementary hooking means (7), which are arranged to cooperate respectively, in push or pull contact, with complementary hooking means (7) or hooking means (6) comprised in an immediately adjacent spoke (2), in certain bending positions of at least one of said arms (4) of at least one of said adjacent spokes (2), to distribute the bending forces between one said spoke (2) whose said arm (4) is bent and at least one of is said adjacent spokes (2).
- Wheel (1) according to claim 1, characterized in that said wheel (1) includes a plurality of said toothings (11, 12) which are different from each other, coplanar in the same perpendicular plane (P) to said pivot axis (D), and arranged alternately with one another.
- Wheel (1) according to claim 2, characterized in that said wheel (1) includes a first toothing (11) and a second toothing (12), different from each other and each comprising spokes that are identical to each other and different from those of the other toothing.
- Wheel (1) according to claim 3, characterized in that said hooking means (6) and said complementary hooking means (7) are arranged to cooperate together in traction, to drive a first spoke (21) of said first toothing (11) by a second spoke (22) adjacent to said first spoke (21) and comprised in said second toothing (12).
- Wheel (1) according to claim 3, characterized in that said hooking means (6) and said complementary hooking means (7) are arranged to cooperate in abutment on abutment surfaces comprised therein, when a first spoke (21) of said first toothing (11) and a second spoke (22), adjacent to said first spoke (21) and comprised in said second toothing (12), move closer together.
- Timepiece wheel (1) comprising at least one flexible toothing, each toothing including a plurality of spokes (2) each including at least one tooth (3) at the distal end of a flexible arm (4) protruding from a hub (5) about a pivot axis (D) of said wheel (1), characterized in that each said spoke (2) includes hooking means (6) and complementary hooking means (7), which are arranged to cooperate respectively, in push or pull contact, with said complementary hooking means (7) and said hooking means (6) comprised in an immediately adjacent spoke (2), in certain bending positions of at least one of said arms (4) of at least one of said adjacent spokes (2), to distribute the bending forces between one said spoke (2) whose said arm (4) is bent, and at least one of its said adjacent spokes (2).
- Wheel (1) according to claim 6, characterized in that said wheel (1) comprises only one toothing (10) which comprises a plurality of said spokes (2) that are identical to each other and distributed in an equidistant manner at the periphery of said wheel (1).
- Wheel (1) according to claim 7, characterized in that said hooking means (6) and said complementary hooking means (7) are arranged to cooperate with each other in traction, to drive a first spoke (21) of said toothing (10) by a second spoke (22) adjacent to said first spoke (21) and comprised in said toothing (10).
- Wheel (1) according to claim 7, characterized in that said hooking means (6) and said complementary hooking means (7) are arranged to cooperate in abutment on abutment surfaces comprised therein, when a first spoke (21) of said toothing (10) and a second spoke (22) of said toothing (10), adjacent to said first spoke (21), move closer together.
- Wheel (1) according to any of claims 1 to 9, characterized in that each said spoke (2) comprises, on either side of a said arm (4), said hooking means (6) on a first side and said complementary hooking means (7) on the other side.
- Wheel (1) according to any of claims 1 to 10, characterized in that said teeth (3) all have the same pitch diameter (DP), and in that said hooking means (6) and said complementary hooking means (7) cooperate with each other in an annular area whose maximum diameter is smaller than said pitch diameter (DP).
- Wheel (1) according to any of claims 1 to 11, characterized in that said hooking means (6) and/or said complementary hooking means (7) are formed by at least one hook (8) integral with the arm (4) comprised in said spoke (2) carrying said hooking means (6) or complementary hooking means (7).
- Wheel (1) according to claim 12, characterized in that said hook (8) includes a distal segment (9) which is substantially radial with respect to said pivot axis (D) and carries an outer compression bearing surface (91) and an inner traction bearing surface (92).
- Wheel (1) according to claim 12 or 13, characterized in that said spoke (2) carries said hooking means (6) and said complementary hooking means (7), in the form respectively of a first hook (86) and a second hook (87).
- Wheel (1) according to claim 14 when claim 12 depends on claim 1, characterized in that said first hook (86) and said second hook (87) each include a distal segment (96; 97), which is substantially radial relative to said pivot axis (D), said distal segments (96; 97) face the same way, either towards the exterior of said wheel (1), or towards said pivot axis (D).
- Wheel (1) according to claim 14 when claim 12 depends on claim 6, characterized in that said first hook (86) and said second hook (87) each include a distal segment (96; 97), which is substantially radial relative to said pivot axis (D), said distal segments (96; 97) face opposite directions, one towards the exterior of said wheel (1), and the other towards said pivot axis (D).
- Wheel (1) according to any of claims 14 or 15 when claim 12 depends on claim 1, characterized in that said first hook (86) and said second hook (87) are carried by a cross-piece (43) substantially perpendicular to said arm (4).
- Wheel (1) according to any of claims 1 to 17, characterized in that all of said arms (4) of said spokes (2) comprised in said wheel (1) are angularly equidistant.
- Wheel (1) according to any of claims 1 to 18, characterized in that said teeth (2) all have the same pitch diameter (DP), and in that the distances measured in the free state on the pitch circle of the pitch diameter (DP) between two successive said teeth are different in pairs.
- Timepiece gear train (100) including at least one wheel (1) according to any of claims 1 to 19.
- Timepiece movement (200) including at least one said timepiece gear train (100) according to claim 20.
- Watch (300) including at least one movement (200) according to claim 21.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH01166/12A CH706762A2 (en) | 2012-07-26 | 2012-07-26 | Timepiece wheel with flexible teeth. |
PCT/EP2013/063988 WO2014016087A1 (en) | 2012-07-26 | 2013-07-03 | Time piece wheel with flexible tooth set |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2877900A1 EP2877900A1 (en) | 2015-06-03 |
EP2877900B1 true EP2877900B1 (en) | 2018-05-16 |
Family
ID=48745960
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13733311.8A Active EP2877900B1 (en) | 2012-07-26 | 2013-07-03 | Time piece wheel with flexible tooth set |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2877900B1 (en) |
CN (1) | CN104603698B (en) |
CH (1) | CH706762A2 (en) |
HK (1) | HK1206438A1 (en) |
WO (1) | WO2014016087A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102022206906A1 (en) | 2022-07-06 | 2024-01-11 | Zf Friedrichshafen Ag | Gear and method for producing a gear |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5546591B2 (en) * | 1974-04-20 | 1980-11-25 | ||
JPS5397151A (en) * | 1977-02-02 | 1978-08-25 | Kanji Imazaike | Gear |
TWI461865B (en) * | 2006-06-23 | 2014-11-21 | Omega Sa | "sprung balance regulating system for a mechanical timepiece movement and timepiece having such a system |
EP2112567B1 (en) * | 2008-04-21 | 2016-07-13 | Rolex Sa | Gear with backlash compensation for a timepiece mechanism |
AT510575B1 (en) * | 2010-09-24 | 2012-05-15 | Miba Sinter Austria Gmbh | GEAR |
-
2012
- 2012-07-26 CH CH01166/12A patent/CH706762A2/en not_active Application Discontinuation
-
2013
- 2013-07-03 EP EP13733311.8A patent/EP2877900B1/en active Active
- 2013-07-03 WO PCT/EP2013/063988 patent/WO2014016087A1/en active Application Filing
- 2013-07-03 CN CN201380038968.7A patent/CN104603698B/en active Active
-
2015
- 2015-07-20 HK HK15106880.3A patent/HK1206438A1/en unknown
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
WO2014016087A1 (en) | 2014-01-30 |
EP2877900A1 (en) | 2015-06-03 |
HK1206438A1 (en) | 2016-01-08 |
CH706762A2 (en) | 2014-01-31 |
CN104603698B (en) | 2016-12-28 |
CN104603698A (en) | 2015-05-06 |
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