EP2657794B1 - Barrel spring and arbour - Google Patents
Barrel spring and arbour Download PDFInfo
- Publication number
- EP2657794B1 EP2657794B1 EP12165537.7A EP12165537A EP2657794B1 EP 2657794 B1 EP2657794 B1 EP 2657794B1 EP 12165537 A EP12165537 A EP 12165537A EP 2657794 B1 EP2657794 B1 EP 2657794B1
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- EP
- European Patent Office
- Prior art keywords
- spring
- barrel
- arbor
- profile
- axis
- 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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- 238000000034 method Methods 0.000 claims description 24
- 238000004519 manufacturing process Methods 0.000 claims description 19
- 238000003754 machining Methods 0.000 claims description 12
- 230000000295 complement effect Effects 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 9
- 238000007514 turning Methods 0.000 claims description 6
- 238000005491 wire drawing Methods 0.000 claims description 4
- 230000000750 progressive effect Effects 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 230000014759 maintenance of location Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 238000005219 brazing Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000003042 antagnostic effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003100 immobilizing effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 235000020004 porter Nutrition 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000012549 training Methods 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
- G04B1/00—Driving mechanisms
- G04B1/10—Driving mechanisms with mainspring
- G04B1/16—Barrels; Arbors; Barrel axles
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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
- G04B1/00—Driving mechanisms
- G04B1/10—Driving mechanisms with mainspring
- G04B1/18—Constructions for connecting the ends of the mainsprings with the barrel or the arbor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49579—Watch or clock making
- Y10T29/49581—Watch or clock making having arbor, pinion, or balance
Definitions
- the invention relates to a method for manufacturing a watch drum shaft.
- the invention also relates to a method for producing a clockwork motor element, comprising at least one mainspring and a barrel shaft, in which said coil spring of a certain type with first internal turn with a defined width and thickness and said first inner turn comprising, for its maintenance on a barrel shaft, at an inner end, defined profile hooking means
- the invention also relates to a method for producing a clockwork mechanism comprising at least one motor element produced by such a method of producing a clockwork motor element.
- the invention relates to the field of watchmaking, and more particularly the field of motor mechanisms.
- the increase in the capacity of the clockwork motor mechanisms is limited by the volume available at the barrels comprising the energy storage springs. This available volume is delimited by the space available in the movement, therefore by the size of the drum incorporating the spring, and by the geometry of the barrel shaft which must be sized to safely transmit the maximum torque.
- the invention proposes to improve the capacity of watch cylinders by the use of barrel shafts of the smallest possible diameters, in order to favor the volume allocated to the spring, or the springs if there are any. several, and therefore increase the power reserve of such barrels.
- the morphology of the shaft conditions the attachment of the spring on the shaft, whose reliability must be ensured to avoid unnecessary dismantling. All things being equal, especially with regard to the materials and heat treatments used for the production of shafts and springs, it is the shape of the shaft, the shape of the spring, but also the type of connection between the spring and the tree, which condition a perfect behavior of the motor element that they compose together.
- the reduction, in a significant factor, of the shaft diameter compared to conventional fabrications, imposes, still, a decrease in the radius of curvature of the first internal turn of the spring, and those following it.
- the combined design of the shaft, of the associated spring, and of their mode of attachment or training must take this constraint into account, to prevent any triangulation or facetisation of the spring at its innermost level, which would reduce its duration. life.
- the invention relates to a method for manufacturing a watch-barrel shaft, in which in a first drawing operation a bar is drawn so as to make it protruding with respect to a profile bearing sector.
- a bar is drawn so as to make it protruding with respect to a profile bearing sector.
- circular or helically around an axis parallel to or coincident with that of said bar at least one continuous profile whose section corresponds to the projection, in a plane perpendicular to said axis, complementary attachment means to achieve on said shaft, and in that, in a second machining operation about an axis parallel to or coincident with said axis of the bearing sector, at the level of said continuous profile, upper and lower delimiting faces of a hook are rotated to cooperate with a spring eyelet, and upper and lower lands are rotated for pivotal guidance of said shaft.
- said continuous profile is that of a hook conjugated to a housing and having a profile corresponding to that of an eyelet which has an inner end of the first inner turn of a spiral band spring barrel of a certain type.
- the invention also relates to a method for producing a clockwork motor element, comprising at least one mainspring and a barrel shaft, in which said coil spring of a certain type with first internal turn with a defined width and thickness and said first inner turn comprising, for its maintenance on a barrel shaft, at an inner end, defined profile hooking means, characterized in that one carries out said barrel shaft by such a method of manufacturing a watch-dog shaft, said shaft comprising means for pivoting guidance about a pivot axis, and comprising at least one bearing sector for the support a said first internal turn of at least one said barrel spring, said shaft having complementary coupling means complementary profile to said profile of said attachment means for its operation in pivoting with said at least one spring.
- said shaft comprises, internally recessed with respect to a cylinder, or with respect to a prism of helical section and parallel to the axis of pivoting of said shaft, comprising said bearing sector, at at least one cavity for receiving said hooking means and / or at least a portion of said first internal turn, and said at least one cavity has a plurality of tangential grooves parallel to said pivot axis and each of profile corresponding to that a boss that includes the first inner turn of a spiral band spring barrel of a specific type, said grooves being angularly equidistant around a cylinder, or around a helical section prism and parallel to the pivot axis of said shaft, including said bearing sector.
- said spring comprises a series of bosses in a number less than or equal to that of said grooves, spaced apart from the same curvilinear pitch as said grooves, and arranged to fit into said grooves.
- said defined thickness of said first internal turn of the spring is less than the thickness of the following turns of the spring. which are of constant or progressive section away from said first inner turn.
- At least said inner end of said first inner coil of the spring comprises, on its inner face intended to bear on said bearing sector of said shaft, a roughness greater than 12 micrometers Ra.
- At least one said spring is welded to said shaft at two points substantially diametrically opposed with respect to said axis of the bearing sector.
- At least one said spring is held without play in an annular groove of said shaft around said bearing sector or in a straight groove of the shaft along a generatrix of said shaft, and said inner end or at least a portion of said first turn is irreversibly maintained in said groove by welding or brazing or hammering at deformation zones.
- the invention also relates to a method for producing a clockwork mechanism comprising at least one motor element produced by such a method for producing a clockwork motor element, characterized in that said mechanism is a cylinder, or a movement incorporating at least one barrel, or a timepiece incorporating at least one movement incorporating at least one barrel.
- the invention relates to a method for manufacturing a watch drum shaft 1.
- a bar 50 in a first drawing operation, is drawn so as to project, projecting or retracting with respect to a bearing sector 2 with a circular profile or in a helix around a parallel DC axis or coinciding with that of the bar 50, at least one continuous profile 30.
- the section of this continuous profile 30 corresponds to the projection, in a plane perpendicular to the DC axis, of additional coupling means 3 to be produced on the shaft 1, in profile complementary to the attachment means 13 of a spring 10 of a given type, for the attachment of which the corresponding shaft 1 is designed.
- the drawing by wire drawing gives the surface surfaces a better fatigue resistance, and ensures a better distribution of the stresses on salient or re-entrant reliefs, in comparison with machining technologies with small radius tools, which create high stress concentrations. , especially in the re-entrant angles, which weaken the tree.
- the hardening resulting from the drawing process concerns the entire peripheral surface, and in particular the gripping zones, which thus retain a high surface hardness and good wear resistance.
- this prism in the sense of the descriptive geometry, a solid built along generatrices parallel to the same axis, in elevation on the basis of a closed plane profile.
- this prism is a right prism, whose generatrices are parallel to a DC axis, and perpendicular to a particular profile, in particular circular, or in a helix.
- This profile when it is chosen in a helix, is then constructed as a function of the thickness of the first internal turn 11 of a spring 10 with which the shaft 1 is intended to cooperate, and the increase of the helix on its periphery is close to the thickness EI of this first turn 11, and calculated so that, when the first turn 11 of this spring is wound on the shaft 1, it carries permanently, or at least as much as possible , on the support sector 2 constituted by the lateral surface of this prism with helical section.
- the spring 10 comes into recovery of the inner end 12 that includes the first inner turn 11, it is not deformed by a bearing discontinuity between the bearing surface 2 and the end 12.
- the Figures 1A, 1B , and 1M illustrate different section profiles after drawing, non-limiting, and well suited to the manufacture of barrel shafts.
- the continuous profile 30 is straight, that is to say defined by generatrices parallel to the axis of the bar 50. A twisted execution is possible, but generates a higher cost, and the present description is limited to the presentation of continuous 30 straight profiles.
- the manufacture of a shaft 1 is related to the intended use of this shaft 1 with a coil spring 10 in a spiral band of a certain type, or belonging to a family of springs with common features as regards their interface with the barrel shaft.
- This interface concerns especially the first inner turn 11, which has an inner free end 12.
- This first turn 11 has a defined width LI and a defined thickness EI. This does not prevent the realization of the inner end 12 with another profile, and / or another width, and / or another thickness, as will be seen in the following description.
- the inner free end 12 has or not an eyelet 16, for example stamped, or resulting from the folding of a leg stamped three-quarters, as visible on the Figures 7A and 7B .
- the free end 12 may also include a cutout of particular shape, as will be explained below, and as visible for example on the Figures 9C , 17A, 17B .
- FIG. 1 M illustrates the case of any hooking relief with a continuous profile both projecting and retreating, and its inscription, as well as a surface with cylindrical surfaces 2, in the envelope of the bar 50.
- the first internal turn 11 of the spring 10 is welded by two diametrically opposite points, and preferably at the level of flats 36 or 37.
- the figure 2 illustrates an advantageous embodiment on the basis of a drawn profile, and which ensures a good maintenance of the spring: this figure 2 illustrates the production of a barrel shaft 1 with hook 34, by a first drawing operation according to the Figure 2A , with a continuous profile 30 according to the Figure 1A or 1B in a variant where the continuous profile 30 is that of a hook 34 conjugated to a housing 35 which allows a better recovery of the first inner turn 11 by the next turn.
- the profile of the hook 34 conjugated to this housing 35 corresponds to that of an eyelet 16 which has an inner end 12 of the first inner turn 11 of a spiral band spring barrel 10 of a certain type.
- FIGS. 5C and 5D illustrate an advantageous variant of spring 10 stamped so as to create, between parallel slots according to the elongation of this spring, at least one folded median tab forming a projection protruding from the rest of the surface of the spring 10.
- This configuration brings the advantage of allowing the recovery of the frolic spring. It is usable, not only in this particular case where it is advantageous to cooperate at least one such boss 15 with grooves 33 of a shaft 1, but also in the general case where it is desired to position precisely, according to the direction of the barrel axis (or else of a balance shaft, or any axis intended to receive a spiral spring clock), such a spiral spring, and in particular, in the case of a barrel, by relative to the drum, and to the possible cover.
- FIGS 9C and 9D show a particular variant of spring 10, having an end 12 in tee, with a head 18 of length LT connected to the rest of the spring 10 by a core 19, preferably adjacent to the chamfers 19A for better support in winding the spring.
- the width LG is greater than or equal to, and preferably equal to, this length LT of a transverse bar.
- the Figure 17A illustrates a particular embodiment of the internal end of the dovetail spring, to cooperate with an antagonistic profile formed on the shaft, here having two shoulders.
- the Figure 17B illustrates a similar variant with a spring end 12 having two clearances cooperating in stop with two pins stuck in the corresponding shaft1; preferably, the end 12 of the spring 10 is embedded in a circular groove 44, resting on a groove flank 46 of at least one side, and preferably on both sides.
- the method of manufacturing such a shaft 1 advantageously comprises a machining operation means 7 for driving a ratchet, by threading or tapping or turning or milling facets, as visible on the figure 19 where these drive means 7 are constituted by a conventional square.
- the Figures 8A and 8B represent a shaft 1 having a front groove 41 opening through an opening 42, and receiving the inner end 12 of the spring 11, made by a method which comprises a machining operation of a front groove 41 of revolution about an axis DG parallel or coincident with the pivot axis D, the front groove 41 being of width LH equal to a defined width LI of the first inner turn 11 of a spiral band spring barrel 10 of a determined type.
- machining operation further comprises machining at least one opening 42 in an outer wall 43 of the front groove 41, the opening 42 being of greater width than a defined thickness El of the first inner turn 11 of a spring barrel 10 in spiral band of a determined type, for the passage of this first inner turn 11.
- a surface roughness is imparted to at least a portion of the axis bearing sector 2.
- DC in the form of a groove made during the first drawing operation, or a knurling performed during the second machining operation.
- This roughness allows a maintenance by friction between the shaft and the spring, especially if the spring comprises, at the first inner coil 11, on its face facing the axis of the shaft 1, a similar friction surface.
- a friction surface may, as an alternative to this mechanical development, result from a surface treatment, a metallization type projection, or the like.
- the invention relates to a driving element 100 of a watch cylinder, comprising at least on the one hand a coil spring 10 of a certain type having a first internal turn 11 with a width L1 and a thickness E1 defined and the first inner turn 11 comprising, for its maintenance on a barrel shaft 1, at an inner end 12, fastening means 13 of profile 14 defined.
- This motor element 10 further comprises a barrel shaft 1 preferably derived from drawing a bar 50 and made by one of the methods described above.
- This shaft 1 comprises pivoting guide means 5, 6, around a pivot axis DP, and comprises at least one bearing sector 2 for the support of such a first inner turn 11 of at least one such a mainspring spring 10, the shaft 1 comprising complementary coupling means 3 of profile 314 complementary to the profile 14 of the attachment means 13 for its cooperation in pivoting with this at least one spring 10.
- the complementary fastening means 13 of the shaft 1 are respectively recessed or in salient relief.
- the shaft 1 comprises, internally recessed with respect to a cylinder, or with respect to a helical section prism and parallel to the axis of pivoting of the shaft 1, comprising the sector 2, at least one cavity 4 for receiving the attachment means 13 and / or at least a part of the first inner turn 11.
- this cavity 4 comprises a front groove 41 whose width LH is arranged for the clearance clearance of the spring 10.
- the front groove 41 is of revolution about a parallel axis DG or coincides with the axis of pivoting D, and its width LH is equal to the defined width LI of the first inner turn 11 of a said mainspring spring 10.
- the shaft 1 has at least one opening 42 in an outer wall 43 of the front groove 41, this opening 42 being wider than the defined thickness EI of the first inner turn 11, for the passage of the first inner turn 11.
- this opening 12 is wide enough to allow the maintenance of the first turn 11 without excessive stress, while being small enough to ensure a good maintenance of the end 12 of the spring 10.
- the central angle in which this opening is between 120 ° and 180 °.
- the shaft 1 comprises, internally recessed with respect to a cylinder, or with respect to a helical section prism and parallel to the axis of pivoting of the shaft 1, comprising the support sector 2, at least one cavity 4 for receiving the attachment means 13 and / or at least a portion of the first inner turn 11.
- the axis DC of the bearing sector 2 is parallel or coincident with the axis Pivot D, and at least one such cavity 4 is dimensioned for receiving without play, in the direction of the width LI of the spring 10, the inner end 12 or at least a portion of the first inner coil 11.
- Figure 11B illustrates a shaft 1 having substantially parallel to each other; a plate 47 and a slot 48 housing the inner coil 11 of the spring 10: its inner end 12 is supported on the plate 47, and the coil 11 is slid into the slot 48.
- the defined thickness EI of the first inner turn 11 of the spring 10 is less than the thickness ES of the following turns of the spring 10, which subsequent turns are of constant section between them, or of progressive section in s' away from the first inner turn 11.
- This embodiment is applicable to all the variants of barrel shafts described here, and it allows an optimal plating of the first inner turn 11 on the shaft 1, and in particular on the cylindrical sector (s) which 'it comprises.
- the free end 12 comprises a chamfer 121 or a radius, so as to allow a good winding of the next turn.
- At least the inner end 12 of the first inner turn 11 of the spring 10 comprises, on its inner face intended to bear on the bearing sector 2 of the shaft 1, a roughness greater than 12 micrometers Ra.
- the relative retention between the spring 10 and the shaft 1 can be provided by removable and complementary means, such as eyelet and hook, or the like. In an alternative, it can be ensured by a permanent connection between them, by a method of fixing, in particular irreversible, by welding, brazing, bonding, or the like.
- at least one such spring 10 is welded to the shaft 1 at two points 51, 52 that are substantially diametrically opposed with respect to the axis DC of the bearing sector 2.
- shafts 1 designed specifically for springs 10 of a given type allow the counter elements to be dimensioned so as to ensure a play-free assembly of the one on the other.
- at least one such spring 10 is held without play in an annular groove 44 of the shaft 1 around the bearing sector 2, or in a straight groove 45 of the shaft 1 along a generatrix of the shaft 1 .
- the inner end 12, or at least a part of the first turn 11, is irreversibly maintained in such a groove 44, 45, by welding or soldering, or else very economical way, by hammering or local crushing at the level of deformation zones 53, at the level of the spring 10 and / or at the level of the shaft 1.
- the figure 16C illustrates a spring 10 mounted fitted and projecting in a circular groove 44 of a shaft 1, and hammered in position for its retention, in particular by the action of a wheel or the like, so as to create deformation surfaces 53 immobilizing the spring relative to the shaft.
- the figure 16D similarly illustrates, and preferred in the usual case where the hardness of the spring is greater than that of the shaft, an application where the wheel is applied to the walls of a groove in which the spring is gripped to imprison it under deformation zones 53.
- All the above-mentioned configurations are suitable for stopping the spring 10 on the shaft 1 by a welding point, laser welding (radial or parallel to the axis), brazing, bonding, or the like.
- the invention also relates to a timepiece mechanism 1000 comprising at least one such motor element 100.
- This mechanism 1000 is a cylinder 200, or a movement 300 incorporating at least one cylinder 200, or a timepiece 400 incorporating at least one movement 300 incorporating at least one cylinder 200.
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Description
L'invention concerne un procédé de fabrication d'un arbre de barillet d'horlogerie.The invention relates to a method for manufacturing a watch drum shaft.
L'invention concerne encore un procédé de réalisation d'un élément moteur de barillet d'horlogerie, comportant au moins un ressort de barillet et un arbre de barillet, où on réalise ledit ressort de barillet en bande spiralée d'un type déterminé comportant une première spire interne avec une largeur et une épaisseur définies et ladite première spire interne comportant, pour son maintien sur un arbre de barillet, au niveau d'une extrémité interne, des moyens d'accrochage de profil définiThe invention also relates to a method for producing a clockwork motor element, comprising at least one mainspring and a barrel shaft, in which said coil spring of a certain type with first internal turn with a defined width and thickness and said first inner turn comprising, for its maintenance on a barrel shaft, at an inner end, defined profile hooking means
L'invention concerne encore un procédé de réalisation d'un mécanisme d'horlogerie comportant au moins un élément moteur réalisé par un tel procédé de réalisation d'un élément moteur de barillet d'horlogerie.The invention also relates to a method for producing a clockwork mechanism comprising at least one motor element produced by such a method of producing a clockwork motor element.
L'invention concerne le domaine de l'horlogerie, et plus particulièrement le domaine des mécanismes moteurs.The invention relates to the field of watchmaking, and more particularly the field of motor mechanisms.
L'augmentation de capacité des mécanismes moteurs d'horlogerie est limitée par le volume disponible au niveau des barillets comportant les ressorts de stockage d'énergie. Ce volume disponible est délimité par l'espace disponible dans le mouvement, donc par la taille du tambour incorporant le ressort, et par la géométrie de l'arbre de barillet qui doit être dimensionné pour transmettre en sécurité le couple maximal.The increase in the capacity of the clockwork motor mechanisms is limited by the volume available at the barrels comprising the energy storage springs. This available volume is delimited by the space available in the movement, therefore by the size of the drum incorporating the spring, and by the geometry of the barrel shaft which must be sized to safely transmit the maximum torque.
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L'invention se propose d'améliorer la capacité des barillets d'horlogerie, par l'emploi d'arbres de barillet de diamètres les plus réduits possibles, afin de privilégier le volume affecté au ressort, ou aux ressorts s'il y en a plusieurs, et donc d'augmenter la réserve de marche de tels barillets.The invention proposes to improve the capacity of watch cylinders by the use of barrel shafts of the smallest possible diameters, in order to favor the volume allocated to the spring, or the springs if there are any. several, and therefore increase the power reserve of such barrels.
Il ne suffit pas d'appliquer un facteur d'échelle aux arbres de barillets existants, car la rigidité de l'arbre doit être assurée, voire augmentée par rapport aux diamètres d'arbres usuels, en raison du couple supérieur pouvant être appliqué par le ressort.It is not sufficient to apply a scaling factor to existing barrel shafts, as the stiffness of the shaft must be ensured, or even increased, compared to the usual shaft diameters, because of the higher torque that can be applied by the shaft. spring.
Il convient donc de choisir des modes d'élaboration garantissant une bonne résistance, à la flexion et à la fatigue, des arbres, tout en restant d'un coût acceptable. La morphologie de l'arbre conditionne la fixation du ressort sur l'arbre, dont la fiabilité doit être assurée pour éviter tout démontage inutile. Toutes choses égales par ailleurs, notamment en ce qui concerne les matériaux et traitements thermiques utilisés pour la réalisation des arbres et ressorts, ce sont la forme de l'arbre, la forme du ressort, mais aussi le type d'assemblage entre le ressort et l'arbre, qui conditionnent un comportement parfait de l'élément moteur qu'ils composent ensemble. La diminution, dans un facteur important, du diamètre d'arbre par rapport aux fabrications classiques, impose, encore, une diminution du rayon de courbure de la première spire interne du ressort, et de celles qui lui font suite. La conception conjuguée de l'arbre, du ressort associé, et de leur mode de fixation ou d'entraînement, doivent prendre en compte cette contrainte, pour prévenir toute triangulation ou facettisation du ressort au niveau de ses pires internes, qui réduiraient sa durée de vie.It is therefore advisable to choose methods of elaboration guaranteeing a good resistance, to the flexion and the fatigue, of the trees, while remaining of an acceptable cost. The morphology of the shaft conditions the attachment of the spring on the shaft, whose reliability must be ensured to avoid unnecessary dismantling. All things being equal, especially with regard to the materials and heat treatments used for the production of shafts and springs, it is the shape of the shaft, the shape of the spring, but also the type of connection between the spring and the tree, which condition a perfect behavior of the motor element that they compose together. The reduction, in a significant factor, of the shaft diameter compared to conventional fabrications, imposes, still, a decrease in the radius of curvature of the first internal turn of the spring, and those following it. The combined design of the shaft, of the associated spring, and of their mode of attachment or training, must take this constraint into account, to prevent any triangulation or facetisation of the spring at its innermost level, which would reduce its duration. life.
A cet effet, l'invention concerne un procédé de fabrication d'un arbre de barillet d'horlogerie, dans lequel dans une première opération de tréfilage on tréfile une barre de façon à réaliser, saillant par rapport à un secteur d'appui à profil circulaire ou en hélice autour d'un axe parallèle ou confondu avec celui de ladite barre, au moins un profil continu dont la section correspond à la projection, selon un plan perpendiculaire audit axe, de moyens d'accrochage complémentaire à réaliser sur ledit arbre, et en ce que, dans une deuxième opération de décolletage autour d'un axe parallèle ou confondu avec ledit axe du secteur d'appui on tourne, au niveau dudit profil continu, des faces de délimitation supérieure et inférieure d'un crochet pour coopérer avec un oeillet de ressort, et on tourne des portées supérieure et inférieure pour le guidage en pivotement dudit arbre.For this purpose, the invention relates to a method for manufacturing a watch-barrel shaft, in which in a first drawing operation a bar is drawn so as to make it protruding with respect to a profile bearing sector. circular or helically around an axis parallel to or coincident with that of said bar, at least one continuous profile whose section corresponds to the projection, in a plane perpendicular to said axis, complementary attachment means to achieve on said shaft, and in that, in a second machining operation about an axis parallel to or coincident with said axis of the bearing sector, at the level of said continuous profile, upper and lower delimiting faces of a hook are rotated to cooperate with a spring eyelet, and upper and lower lands are rotated for pivotal guidance of said shaft.
Selon une caractéristique de l'invention, ledit profil continu est celui d'un crochet conjugué à un logement et de profil correspondant à celui d'un oeillet que comporte une extrémité interne de la première spire interne d'un ressort de barillet en bande spiralée d'un type déterminé.According to a characteristic of the invention, said continuous profile is that of a hook conjugated to a housing and having a profile corresponding to that of an eyelet which has an inner end of the first inner turn of a spiral band spring barrel of a certain type.
L'invention concerne encore un procédé de réalisation d'un élément moteur de barillet d'horlogerie, comportant au moins un ressort de barillet et un arbre de barillet, où on réalise ledit ressort de barillet en bande spiralée d'un type déterminé comportant une première spire interne avec une largeur et une épaisseur définies et ladite première spire interne comportant, pour son maintien sur un arbre de barillet, au niveau d'une extrémité interne, des moyens d'accrochage de profil défini, caractérisé en ce qu'on réalise ledit arbre de barillet par un tel procédé de fabrication d'un arbre de barillet d'horlogerie, ledit arbre comportant des moyens de guidage en pivotement autour d'un axe de pivotement, et comportant au moins un secteur d'appui pour l'appui d'une dite première spire interne d'au moins un dit ressort de barillet, ledit arbre comportant des moyens d'accrochage complémentaire de profil complémentaire audit profil desdits moyens d'accrochage pour sa coopération en pivotement avec ledit au moins un ressort.The invention also relates to a method for producing a clockwork motor element, comprising at least one mainspring and a barrel shaft, in which said coil spring of a certain type with first internal turn with a defined width and thickness and said first inner turn comprising, for its maintenance on a barrel shaft, at an inner end, defined profile hooking means, characterized in that one carries out said barrel shaft by such a method of manufacturing a watch-dog shaft, said shaft comprising means for pivoting guidance about a pivot axis, and comprising at least one bearing sector for the support a said first internal turn of at least one said barrel spring, said shaft having complementary coupling means complementary profile to said profile of said attachment means for its operation in pivoting with said at least one spring.
Selon une caractéristique de l'invention, ledit arbre comporte, en retrait interne par rapport à un cylindre, ou par rapport à un prisme de section en hélice et parallèle à l'axe de pivotement dudit arbre, comportant ledit secteur d'appui, au moins une cavité pour la réception desdits moyens d'accrochage ou/et d'au moins une partie de ladite première spire interne, et ladite au moins une cavité comporte une pluralité de rainures tangentielles parallèles audit axe de pivotement et chacune de profil correspondant à celui d'un bossage que comporte la première spire interne d'un ressort de barillet en bande spiralée d'un type déterminé, lesdites rainures étant angulairement équidistantes autour d'un cylindre, ou autour d'un prisme de section en hélice et parallèle à l'axe de pivotement dudit arbre, comportant ledit secteur d'appui.According to one characteristic of the invention, said shaft comprises, internally recessed with respect to a cylinder, or with respect to a prism of helical section and parallel to the axis of pivoting of said shaft, comprising said bearing sector, at at least one cavity for receiving said hooking means and / or at least a portion of said first internal turn, and said at least one cavity has a plurality of tangential grooves parallel to said pivot axis and each of profile corresponding to that a boss that includes the first inner turn of a spiral band spring barrel of a specific type, said grooves being angularly equidistant around a cylinder, or around a helical section prism and parallel to the pivot axis of said shaft, including said bearing sector.
Selon une caractéristique de l'invention, ledit ressort comporte une série de bossages en nombre inférieur ou égal à celui des dites rainures, écartés du même pas curviligne que lesdites rainures, et agencés pour s'encastrer dans lesdites rainures.According to a characteristic of the invention, said spring comprises a series of bosses in a number less than or equal to that of said grooves, spaced apart from the same curvilinear pitch as said grooves, and arranged to fit into said grooves.
Selon une caractéristique de l'invention, ladite épaisseur définie de ladite première spire interne du ressort est inférieure à l'épaisseur des spires suivantes du ressort lesquelles sont de section constante ou progressive en s'éloignant de ladite première spire interne.According to one characteristic of the invention, said defined thickness of said first internal turn of the spring is less than the thickness of the following turns of the spring. which are of constant or progressive section away from said first inner turn.
Selon une caractéristique de l'invention, au moins ladite extrémité interne de ladite première spire interne du ressort comporte, sur sa face interne destinée à venir en appui sur ledit secteur d'appui dudit arbre, une rugosité supérieure à 12 micromètres Ra.According to a feature of the invention, at least said inner end of said first inner coil of the spring comprises, on its inner face intended to bear on said bearing sector of said shaft, a roughness greater than 12 micrometers Ra.
Selon une caractéristique de l'invention, au moins un dit ressort est soudé sur ledit arbre au niveau de deux points sensiblement diamétralement opposés par rapport audit axe du secteur d'appui.According to a characteristic of the invention, at least one said spring is welded to said shaft at two points substantially diametrically opposed with respect to said axis of the bearing sector.
Selon une caractéristique de l'invention, au moins un dit ressort est maintenu sans jeu dans une gorge annulaire dudit arbre autour dudit secteur d'appui ou dans une gorge droite de l'arbre selon une génératrice dudit arbre, et ladite extrémité interne ou au moins une partie de ladite première spire est maintenue de façon irréversible dans ladite gorge par soudage ou brasage ou martelage au niveau de zones de déformation.According to a feature of the invention, at least one said spring is held without play in an annular groove of said shaft around said bearing sector or in a straight groove of the shaft along a generatrix of said shaft, and said inner end or at least a portion of said first turn is irreversibly maintained in said groove by welding or brazing or hammering at deformation zones.
L'invention concerne encore un procédé de réalisation d'un mécanisme d'horlogerie comportant au moins un élément moteur réalisé par un tel procédé de réalisation d'un élément moteur de barillet d'horlogerie, caractérisé en ce que ledit mécanisme est un barillet, ou un mouvement incorporant au moins un barillet, ou une pièce d'horlogerie incorporant au moins un mouvement incorporant au moins un barillet.The invention also relates to a method for producing a clockwork mechanism comprising at least one motor element produced by such a method for producing a clockwork motor element, characterized in that said mechanism is a cylinder, or a movement incorporating at least one barrel, or a timepiece incorporating at least one movement incorporating at least one barrel.
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 coupe perpendiculairement à un axe de barre, différentes variantes de sections de barres tréfilées pour la réalisation d'arbres de barillet d'horlogerie, repérées A, B, et M; - la
figure 2 illustre la réalisation d'un arbre de barillet à crochet, par une première opération de tréfilage selon lafigure 2A , et une opération de reprise d'usinage selon lafigure 2B ; - les
figures 5C et 5D illustrent, en vue de côté et en vue de dessus, l'extrémité interne d'un ressort étampé de façon à créer, entre des fentes parallèles selon l'élongation de ce ressort, au moins une patte médiane pliée formant un bossage saillant par rapport au reste de la surface du ressort ;
- les
figures 7A et 7B illustrent un étampage de l'extrémité interne d'un ressort, de façon à définir une fenêtre d'accrochage sur un bec d'arbre; - la
figure 8A représente, de façon analogue à lafigure 2 , une variante où l'arbre comporte une gorge frontale débouchant par une ouverture, et, recevant l'extrémité interne du ressort ; lafigure 8B est une vue en coupe, dans un plan passant par l'axe de l'arbre, de ce même ensemble ; - la
figure 9C est une élévation de l'extrémité d'un ressort, comportant une extrémité en té, et lafigure 9D est la vue de dessus correspondante, montrant un chanfrein sur la face interne ; - la
figure 11 B représente, en coupe perpendiculairement à l'axe du barillet, un arbre muni d'un ressort dont l'extrémité interne est en appui sur un plat puis glissée dans une fente ; - la
figure 15 représente, de façon schématisée et en coupe perpendiculairement à l'axe du barillet, un ressort de barillet dont les spires intérieures sont amincies par rapport aux autres spires, partiellement enroulé sur un arbre cylindrique ; - la
figure 16 A illustre une réalisation avec un ressort soudé sur un arbre avec deux points de soudure sensiblement diamétralement opposés; lafigure 16C représente, de façon schématisée et selon une coupe passant par l'axe, un ressort monté saillant dans une gorge circulaire, et soumis, du côté supérieur, à l'action d'une molette pour une déformation au niveau de sa bordure, la bordure inférieure étant représentée avec une surface de déformation issue de l'action de cette molette sur le ressort, tandis que lafigure 16D illustre de façon similaire, et préférée dans le cas usuel où la dureté du ressort est supérieure à celle de l'arbre, où la molette est appliquée sur les parois d'une gorge dans laquelle est enserré le ressort pour emprisonner celui-ci sous des zones de déformation; - la
figure 17A illustre une exécution particulière d'extrémité interne du ressort en queue d'aronde, pour coopérer avec un profil antagoniste ménagés sur l'arbre, ici comportant deux épaulements ; lafigure 17B illustre une variante similaire avec une extrémité de ressort comportant deux dégagements, coopérant en arrêt avec deux goupilles fichées dans l'arbre correspondant ; - la
figure 19 est un schéma-blocs d'une pièce d'horlogerie, comportant un mouvement, lequel comporte un barillet, incluant lui-même un élément-moteur comportant un arbre et un ressort selon l'invention.
- the
figure 1 represents, schematically and in cross section perpendicularly to a rod axis, different variants of sections of drawn bars for producing watch drum shafts, marked A, B, and M; - the
figure 2 illustrates the realization of a hook barrel shaft, by a first drawing operation according to theFigure 2A , and a resumption of machining operation according to theFigure 2B ; - the
Figures 5C and 5D illustrate, in side view and in plan view, the inner end of a spring stamped so as to create, between parallel slots according to the elongation of this spring, at least one folded middle flange forming a projection protruding from the rest of the surface of the spring;
- the
Figures 7A and 7B illustrate a stamping of the inner end of a spring, so as to define an attachment window on a spout; - the
figure 8A represents, in a similar way tofigure 2 a variant where the shaft has a front groove opening through an opening, and receiving the inner end of the spring; theFigure 8B is a sectional view, in a plane passing through the axis of the tree, of this same set; - the
Figure 9C is an end elevation of a spring, having a tee end, and theFigure 9D is the corresponding top view, showing a chamfer on the inner face; - the
figure 11 B represents, in section perpendicular to the axis of the barrel, a shaft provided with a spring whose inner end is supported on a plate and then slid into a slot; - the
figure 15 represents, schematically and in section perpendicular to the axis of the barrel, a barrel spring whose inner turns are thinned relative to the other turns, partially wound on a cylindrical shaft; - the
figure 16 A illustrates an embodiment with a spring welded to a shaft with two substantially diametrically opposed weld points; thefigure 16C represents, schematically and in a section passing through the axis, a spring mounted projecting in a circular groove, and subjected, on the upper side, to the action of a wheel for a deformation at its edge, the edge lower part being represented with a deformation surface resulting from the action of this wheel on the spring, while thefigure 16D similarly illustrated, and preferred in the usual case where the hardness of the spring is greater than that of the shaft, where the wheel is applied to the walls of a groove in which is gripped the spring to imprison it under deformation zones; - the
Figure 17A illustrates a particular embodiment of the inner end of the dovetail spring, to cooperate with an opposing profile formed on the shaft, here having two shoulders; theFigure 17B illustrates a similar variant with a spring end having two clearances cooperating in stop with two pins stuck in the corresponding shaft; - the
figure 19 is a block diagram of a timepiece, comprising a movement, which comprises a cylinder, including itself a motor element comprising a shaft and a spring according to the invention.
L'invention concerne un procédé de fabrication d'un arbre 1 de barillet d'horlogerie. Selon ce procédé, dans une première opération de tréfilage on tréfile une barre 50 de façon à réaliser, saillant ou rentrant par rapport à un secteur d'appui 2 à profil circulaire ou en hélice autour d'un axe DC parallèle ou confondu avec celui de la barre 50, au moins un profil continu 30. La section de ce profil continu 30 correspond à la projection, selon un plan perpendiculaire à l'axe DC, de moyens d'accrochage complémentaire 3 à réaliser sur l'arbre 1, de profil complémentaire à des moyens d'accrochage 13 d'un ressort 10 de type déterminé, pour l'accrochage duquel l'arbre 1 correspondant est conçu. La réalisation par tréfilage confère aux surfaces superficielles une meilleure tenue en fatigue, et assure une meilleure répartition des contraintes sur des reliefs saillants ou rentrants, en comparaison avec des technologies d'usinage avec des outils de petit rayon, qui créent des concentrations de contraintes importantes, surtout dans les angles rentrants, et qui fragilisent l'arbre. L'écrouissage résultant du tréfilage concerne toute la surface périphérique, et notamment les zones d'accrochage, qui conservent ainsi une dureté superficielle élevée, et une bonne résistance à l'usure.The invention relates to a method for manufacturing a watch drum shaft 1. According to this method, in a first drawing operation, a
On appellera ci-après « prisme », au sens de la géométrie descriptive, un solide construit selon des génératrices parallèles à un même axe, en élévation sur la base d'un profil fermé plan. De préférence dans le cas du présent exposé, ce prisme est un prisme droit, dont les génératrices sont parallèles à un axe DC, et perpendiculaires à un profil particulier, notamment circulaire, ou bien en hélice. Ce profil, quand il est choisi en hélice, est alors construit en fonction de l'épaisseur de la première spire interne 11 d'un ressort 10 avec lequel l'arbre 1 a vocation à coopérer, et l'accroissement de l'hélice sur son pourtour est voisin de l'épaisseur EI de cette première spire 11, et calcul de façon à ce que, quand la première spire 11 de ce ressort est enroulée sur l'arbre 1, elle porte en permanence, ou du moins au maximum possible, sur le secteur d'appui 2 constitué par la surface latérale de ce prisme à section en hélice. Ainsi, quand le ressort 10 vient en recouvrement de l'extrémité interne 12 que comporte la première spire interne 11, il n'est pas déformé par une discontinuité d'appui entre cette surface d'appui 2 et l'extrémité 12.Hereinafter referred to as "prism", in the sense of the descriptive geometry, a solid built along generatrices parallel to the same axis, in elevation on the basis of a closed plane profile. Preferably in the case of the present disclosure, this prism is a right prism, whose generatrices are parallel to a DC axis, and perpendicular to a particular profile, in particular circular, or in a helix. This profile, when it is chosen in a helix, is then constructed as a function of the thickness of the first
Dans une deuxième opération de reprise d'usinage ou de décolletage autour d'un axe parallèle ou confondu avec l'axe DC du secteur d'appui 2, on usine ou on tourne le contour externe complet de l'arbre 1. De façon préférée car la plus économique, cette deuxième opération de reprise est faite en décolletage ou en tournage.In a second machining operation or machining operation around an axis parallel to or coincident with the DC axis of the
Les
Dans une mise en oeuvre particulière et préférée de l'invention, la fabrication d'un arbre 1 est liée à l'utilisation prévue de cet arbre 1 avec un ressort de barillet 10 en bande spiralée d'un type déterminé, ou appartenant à une famille de ressorts présentant des caractéristiques communes en ce qui concerne leur interface avec l'arbre de barillet. Cet interface concerne surtout la première spire interne 11, qui comporte une extrémité libre interne 12. Cette première spire 11 a une largeur définie LI et une épaisseur définie EI. Ceci n'empêche pas la réalisation de l'extrémité interne 12 avec un autre profil, ou/et une autre largeur, ou/et une autre épaisseur, comme on le verra dans la suite de l'exposé.In a particular and preferred embodiment of the invention, the manufacture of a shaft 1 is related to the intended use of this shaft 1 with a
Selon le cas, l'extrémité libre interne 12 comporte ou non un oeillet 16, par exemple étampé, ou résultant du pliage d'une patte étampée aux trois quarts, tel que visible sur les
La figure 1 M illustre le cas d'un relief d'accrochage quelconque avec un profil continu 30 à la fois saillant et rentrant, et son inscription, ainsi qu'une surface à portées cylindriques 2, dans l'enveloppe de la barre 50.FIG. 1 M illustrates the case of any hooking relief with a continuous profile both projecting and retreating, and its inscription, as well as a surface with
Sur la
La
Les
Les
Ce profil en té est un exemple de réalisation économique, non limitatif. La
Le procédé de fabrication d'un tel arbre 1 comporte avantageusement une opération d'usinage de moyens d'entraînement 7 d'un rochet, par filetage ou taraudage ou tournage ou fraisage de facettes, tel que visible sur la
Les
De préférence, lors de l'élaboration d'un arbre 1 selon l'un des procédés décrits ci-dessus, on confère une rugosité superficielle, supérieure à 12 micromètres Ra, à au moins une partie du secteur d'appui 2 d'axe DC, sous la forme d'une cannelure réalisée lors de la première opération de tréfilage, ou d'un moletage réalisé lors de la deuxième opération de reprise d'usinage. Cette rugosité permet un maintien par friction entre l'arbre et le ressort, surtout si le ressort comporte, au niveau de la première spire interne 11, sur sa face dirigée vers l'axe de l'arbre 1, une surface de friction similaire. Naturellement, une telle surface de friction peut, en alternative à cette élaboration mécanique, résulter d'un traitement de surface, d'une projection de type métallisation, ou similaire.Preferably, during the production of a shaft 1 according to one of the processes described above, a surface roughness, greater than 12 micrometers Ra, is imparted to at least a portion of the
L'invention concerne un élément moteur 100 de barillet d'horlogerie, comportant au moins d'une part un ressort de barillet 10 en bande spiralée d'un type déterminé comportant une première spire interne 11 avec une largeur LI et une épaisseur El définies et la première spire interne 11 comportant, pour son maintien sur un arbre de barillet 1, au niveau d'une extrémité interne 12, des moyens d'accrochage 13 de profil 14 défini. Cet élément moteur 10 comporte d'autre part un arbre de barillet 1 de préférence issu de tréfilage d'une barre 50 et réalisé par un des procédés décrits ci-dessus.The invention relates to a
Cet arbre 1 comporte des moyens de guidage en pivotement 5, 6, autour d'un axe de pivotement DP, et comporte au moins un secteur d'appui 2 pour l'appui d'une telle première spire interne 11 d'au moins un tel ressort de barillet 10, l'arbre 1 comportant des moyens d'accrochage complémentaire 3 de profil 314 complémentaire au profil 14 des moyens d'accrochage 13 pour sa coopération en pivotement avec ce au moins un ressort 10.This shaft 1 comprises pivoting guide means 5, 6, around a pivot axis DP, and comprises at least one
Selon que les moyens d'accrochage 13 du ressort 10 sont en relief saillant ou en creux, les moyens d'accrochage complémentaire 13 de l'arbre 1 sont respectivement en creux ou en relief saillantDepending on whether the fastening means 13 of the
Dans les exécutions des
Dans le cas particulier des
Dans une réalisation particulière de l'élément moteur, l'arbre 1 comporte, en retrait interne par rapport à un cylindre, ou par rapport à un prisme de section en hélice et parallèle à l'axe de pivotement de l'arbre 1, comportant le secteur d'appui 2, au moins une cavité 4 pour la réception des moyens d'accrochage 13 ou/et d'au moins une partie de la première spire interne 11. L'axe DC du secteur d'appui 2 est parallèle ou confondu avec l'axe de pivotement D, et au moins une telle cavité 4 est dimensionnée pour la réception sans jeu, dans le sens de la largeur LI du ressort 10, de l'extrémité interne 12 ou d'au moins une partie de la première spire interne 11.In a particular embodiment of the driving element, the shaft 1 comprises, internally recessed with respect to a cylinder, or with respect to a helical section prism and parallel to the axis of pivoting of the shaft 1, comprising the
Dans la variante de la
Dans une exécution avantageuse illustrée par la
Cette exécution est applicable à toutes les variantes d'arbres de barillet décrites ici, et elle permet un plaquage optimal de la première spire interne 11 sur l'arbre 1, et en particulier sur le ou les secteur(s) cylindrique (s) qu'il comporte. Avantageusement l'extrémité libre 12 comporte un chanfrein 121 ou un rayon, de façon à permettre un bon enroulement de la spire suivante.This embodiment is applicable to all the variants of barrel shafts described here, and it allows an optimal plating of the first
Dans une réalisation particulière, au moins l'extrémité interne 12 de la première spire interne 11 du ressort 10 comporte, sur sa face interne destinée à venir en appui sur le secteur d'appui 2 de l'arbre 1, une rugosité supérieure à 12 micromètres Ra.In a particular embodiment, at least the
Le maintien relatif entre le ressort 10 et l'arbre 1 peut être assuré par des moyens amovibles et complémentaires, tels qu'oeillet et crochet, ou similaire. Dans une alternative, il peut être assuré par une liaison permanente entre eux, par un procédé de fixation, notamment irréversible, par soudage, brasage, collage, ou similaire. Dans une version particulière illustrée à la
Les modes d'élaboration proposés pour des arbres 1 conçus spécifiquement pour des ressorts 10 de type déterminé autorisent un dimensionnement des éléments antagonistes de façon à assurer un montage sans jeu de l'un sur l'autre. En particulier, au moins un tel ressort 10 est maintenu sans jeu dans une gorge annulaire 44 de l'arbre 1 autour du secteur d'appui 2, ou dans une gorge droite 45 de l'arbre 1 selon une génératrice de l'arbre 1.The development methods proposed for shafts 1 designed specifically for
De façon avantageuse, quand on désire un maintien irréversible, l'extrémité interne 12, ou au moins une partie de la première spire 11, est maintenue de façon irréversible dans une telle gorge 44, 45, par soudage ou brasage, ou encore, de façon très économique, par martelage ou écrasement local au niveau de zones de déformation 53, au niveau du ressort 10 ou/et au niveau de l'arbre 1. La
Toutes les configurations exposées ci-dessus se prêtent à un arrêt du ressort 10 sur l'arbre 1 par un point de soudage, soudage laser (radial ou parallèle à l'axe), brasage, collage, ou similaire.All the above-mentioned configurations are suitable for stopping the
L'invention concerne encore un mécanisme d'horlogerie 1000 comportant au moins un tel élément moteur 100. Ce mécanisme 1000 est un barillet 200, ou un mouvement 300 incorporant au moins un barillet 200, ou une pièce d'horlogerie 400 incorporant au moins un mouvement 300 incorporant au moins un barillet 200.The invention also relates to a
Claims (9)
- Method for fabrication of a timepiece barrel arbor, in which, in a first wire drawing operation, a bar is drawn to form at least one continuous profile (30), protruding with respect to a support sector (2) of circular or helical profile about an axis (DC) parallel to or coincident with that of said bar, wherein the cross-section of said continuous profile (30) corresponds to the projection, in a plane perpendicular to said axis (DC), of complementary hooking means (3) to be made on said arbor (1), and in that, in a second, bar turning operation about an axis parallel to or coincident with said axis (DC) of said support sector (2), at the level of said continuous profile (30) upper (34A) and lower (34B) surfaces delimiting a hook (34) are turned, to cooperate with an eye of a spring, and upper (5) and lower (6) shoulders are turned for guiding the pivoting of said arbor (1).
- Method for fabrication of a timepiece barrel arbor (1) according to claim 1, characterized in that at least one portion of said support sector (2) along said axis (DC) is given a surface roughness greater than 12 micrometres Ra, in the form of a flute made during said wire drawing operation.
- Method for fabrication of a timepiece barrel arbor (1) according to any of claims 1 or 2, characterized in that at least one portion of said support sector (2) along said axis (DC) is given a surface roughness greater than 12 micrometres Ra, in the form of a knurled portion made during said further machining operation.
- Method for making a drive element (100) for a timepiece barrel, including at least one mainspring (10) and a barrel arbor (1), wherein a spiral strip mainspring (10) of determined type is made including a first inner coil (11) with a defined width (L1) and thickness (EI) and said first inner coil (11) including, for the holding thereof on a barrel arbor (1), at an inner end (12), hooking means (13) having a defined profile (14), characterized in that said barrel arbor (1) is made by a method according to any of the preceding claims, said arbor (1) including means (5, 6) for pivotal guiding about a pivot axis (DP), and including at least one support sector (2) for supporting a said first inner coil (11) of at least one said mainspring (10), said arbor (1) including complementary hooking means (3) having a complementary profile (314) to said profile (14) of said hooking means (13) for pivotal cooperation thereof with said at least one spring (10).
- Method for making a drive element (100) for a timepiece barrel according to claim 4, characterized in that said spiral strip mainspring (10) of determined type is made with an eye (16) at an inner end (12) of the first inner coil (11) of said spring (10), and in that said continuous profile (30) is produced by wire drawing to the profile of a hook (34) combined with a housing (35) and having a profile corresponding to that of said eye (16).
- Method for making a drive element (100) for a timepiece barrel according to claim 4 or 5, characterized in that said spring (10) is produced with said defined thickness (EI) of said first inner coil (11) which is smaller than the thickness (ES) of the following coils of said spring (10), which are of constant or progressive cross-section moving away from said first inner coil (11).
- Method for making a drive element (100) for a timepiece barrel according to any of claims 4 to 6, characterized in that said spring (10) is made with at least said inner end (12) of said first inner coil (11) of said spring (10) which includes, on the inner face thereof intended to bear on said support sector (2) of said arbor (1), a roughness greater than 12 micrometres Ra.
- Method for making a drive element (100) for a timepiece barrel according to any of claims 4 to 7, characterized in that at least one said spring (10) is welded to said arbor (1) at two substantially diametrically opposite points (51, 52) with respect to said axis (DC) of said support sector (2).
- Method for making a timepiece mechanism (1000) including at least one drive element (100) made by a method according to any of claims 4 to 8, characterized in that said mechanism (1000) is a barrel (200), or a movement (300) incorporating at least one barrel (200), or a timepiece (400) incorporating at least one movement (300) incorporating at least one barrel (200).
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12165537.7A EP2657794B1 (en) | 2012-04-25 | 2012-04-25 | Barrel spring and arbour |
EP13163792.8A EP2674817B1 (en) | 2012-04-25 | 2013-04-15 | Manufacturing method of an arbour of a timepiece barrel |
RU2013119128A RU2609397C2 (en) | 2012-04-25 | 2013-04-24 | Drum shaft and mainspring |
US13/869,480 US9317013B2 (en) | 2012-04-25 | 2013-04-24 | Method of producing drive element for a timepiece barrel including a barrel arbor and mainspring |
CN201310148320.7A CN103376727B (en) | 2012-04-25 | 2013-04-25 | Bar axle and mainspring barrel |
JP2013092016A JP5749760B2 (en) | 2012-04-25 | 2013-04-25 | Barrel box and spring |
HK14103820.4A HK1190805A1 (en) | 2012-04-25 | 2014-04-22 | Barrel arbour and mainspring |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12165537.7A EP2657794B1 (en) | 2012-04-25 | 2012-04-25 | Barrel spring and arbour |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2657794A1 EP2657794A1 (en) | 2013-10-30 |
EP2657794B1 true EP2657794B1 (en) | 2017-02-01 |
Family
ID=48050616
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12165537.7A Active EP2657794B1 (en) | 2012-04-25 | 2012-04-25 | Barrel spring and arbour |
EP13163792.8A Active EP2674817B1 (en) | 2012-04-25 | 2013-04-15 | Manufacturing method of an arbour of a timepiece barrel |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13163792.8A Active EP2674817B1 (en) | 2012-04-25 | 2013-04-15 | Manufacturing method of an arbour of a timepiece barrel |
Country Status (6)
Country | Link |
---|---|
US (1) | US9317013B2 (en) |
EP (2) | EP2657794B1 (en) |
JP (1) | JP5749760B2 (en) |
CN (1) | CN103376727B (en) |
HK (1) | HK1190805A1 (en) |
RU (1) | RU2609397C2 (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5961755B2 (en) * | 2012-06-28 | 2016-08-02 | ニヴァロックス−ファー ソシエテ アノニム | Clock spring |
EP2977827B1 (en) | 2014-07-22 | 2017-11-15 | Montres Breguet SA | Clock barrel with improved force transmission |
EP3106935A1 (en) * | 2015-06-16 | 2016-12-21 | Nivarox-FAR S.A. | Method for manufacturing a part comprising a modified browning step |
EP3106928A1 (en) * | 2015-06-16 | 2016-12-21 | Nivarox-FAR S.A. | Manufacturing method comprising a modified bar turning step |
WO2017005394A1 (en) * | 2015-07-07 | 2017-01-12 | Patek Philippe Sa Geneve | Watch barrel arbor |
EP3118692B1 (en) * | 2015-07-16 | 2018-12-26 | Nivarox-FAR S.A. | Timepiece hairspring to hairspring-stud attachment by gluing |
EP3176650B1 (en) * | 2015-12-02 | 2019-02-06 | Nivarox-FAR S.A. | Protection of a timepiece component with micro-machinable material |
JP6753127B2 (en) * | 2016-04-25 | 2020-09-09 | セイコーエプソン株式会社 | Watch movements and watches |
EP3255510B1 (en) * | 2016-06-10 | 2019-06-05 | Nivarox-FAR S.A. | Calender and method for calendering a timepiece barrel spring |
JP7133909B2 (en) * | 2016-07-04 | 2022-09-09 | ロレックス・ソシエテ・アノニム | Watch assembly manufacturing method and watch assembly obtained by said manufacturing method |
JP2018054562A (en) * | 2016-09-30 | 2018-04-05 | セイコーエプソン株式会社 | Driving device for watch and manufacturing method for driving device for watch |
CH713389B1 (en) * | 2017-01-27 | 2020-11-30 | Richemont Int Sa | System for connecting a shaft to a part. |
EP3499316A1 (en) * | 2017-12-15 | 2019-06-19 | Nivarox-FAR S.A. | Barrel spring for a clock movement of a timepiece and method for manufacturing such a spring |
CH716092B1 (en) | 2018-04-26 | 2022-10-31 | Patek Philippe Sa Geneve | Clock barrel and method for modifying a watch movement. |
EP3804099A1 (en) | 2018-05-31 | 2021-04-14 | Koninklijke Philips N.V. | Drivetrain assembly for a personal care device |
EP3872576B1 (en) | 2020-02-25 | 2024-02-21 | ETA SA Manufacture Horlogère Suisse | Timepiece barrel with twisted arbor |
JP7160389B2 (en) * | 2021-02-19 | 2022-10-25 | 速水発条株式会社 | Spiral spring device |
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DE471680C (en) * | 1929-02-15 | Feinbau Maschinen Akt Ges | Spring axis | |
US820252A (en) * | 1905-06-19 | 1906-05-08 | New Haven Clock Co | Watch-barrel arbor. |
DE434664C (en) * | 1925-01-29 | 1926-09-30 | Carl Boeving Dipl Ing | Fuse for spring drives |
DE1176574B (en) * | 1953-10-27 | 1964-08-20 | Dr Reinhard Straumann | Barrel with slip clutch for self-winding watches |
CH566044A (en) * | 1972-12-18 | 1975-08-29 | ||
CH672973A4 (en) * | 1973-05-11 | 1976-05-14 | ||
CH607738B (en) | 1975-10-21 | Ebauchesfabrik Eta Ag | ARBRE DE BARILLET EXTRACTIBLE POUR MOUVEMENT DE MONTRE. | |
JPH0648152Y2 (en) * | 1988-10-20 | 1994-12-07 | 株式会社精工舎 | Mainspring power mechanism |
JPH02140490U (en) * | 1989-04-27 | 1990-11-26 | ||
CN100451874C (en) * | 2003-03-11 | 2009-01-14 | 弗兰克.米勒.瓦差兰股份有限公司 | Coil spring of timer |
ATE430953T1 (en) * | 2004-07-02 | 2009-05-15 | Nivarox Sa | HAIR SPRING MADE OF TWO MATERIALS WITH SELF-COMPENSATION |
JP5050756B2 (en) * | 2007-09-28 | 2012-10-17 | セイコーエプソン株式会社 | Mainspring device and clock |
CN201662690U (en) * | 2010-03-30 | 2010-12-01 | 天津海鸥表业集团有限公司 | Wind spring shaft structure of large mechanical watch movement |
EP2420899B1 (en) * | 2010-08-19 | 2018-12-19 | ETA SA Manufacture Horlogère Suisse | Barrel for automatically winding timepiece |
-
2012
- 2012-04-25 EP EP12165537.7A patent/EP2657794B1/en active Active
-
2013
- 2013-04-15 EP EP13163792.8A patent/EP2674817B1/en active Active
- 2013-04-24 US US13/869,480 patent/US9317013B2/en active Active
- 2013-04-24 RU RU2013119128A patent/RU2609397C2/en active
- 2013-04-25 JP JP2013092016A patent/JP5749760B2/en active Active
- 2013-04-25 CN CN201310148320.7A patent/CN103376727B/en active Active
-
2014
- 2014-04-22 HK HK14103820.4A patent/HK1190805A1/en unknown
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
EP2674817A2 (en) | 2013-12-18 |
JP2013228393A (en) | 2013-11-07 |
CN103376727B (en) | 2016-02-10 |
CN103376727A (en) | 2013-10-30 |
JP5749760B2 (en) | 2015-07-15 |
EP2657794A1 (en) | 2013-10-30 |
US9317013B2 (en) | 2016-04-19 |
HK1190805A1 (en) | 2014-07-11 |
EP2674817A3 (en) | 2017-05-17 |
EP2674817B1 (en) | 2020-05-27 |
RU2609397C2 (en) | 2017-02-01 |
US20130283615A1 (en) | 2013-10-31 |
RU2013119128A (en) | 2014-10-27 |
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