EP2977833A1 - Präzise Positionierung der Brücke einer Uhr - Google Patents

Präzise Positionierung der Brücke einer Uhr Download PDF

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Publication number
EP2977833A1
EP2977833A1 EP14177878.7A EP14177878A EP2977833A1 EP 2977833 A1 EP2977833 A1 EP 2977833A1 EP 14177878 A EP14177878 A EP 14177878A EP 2977833 A1 EP2977833 A1 EP 2977833A1
Authority
EP
European Patent Office
Prior art keywords
pin
bridge
plate
assembly
facets
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.)
Granted
Application number
EP14177878.7A
Other languages
English (en)
French (fr)
Other versions
EP2977833B1 (de
Inventor
Dave Mangin
Sylvain Maréchal
Benoît Junod
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Montres Breguet SA
Original Assignee
Montres Breguet SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Montres Breguet SA filed Critical Montres Breguet SA
Priority to EP14177878.7A priority Critical patent/EP2977833B1/de
Priority to CN201510428774.9A priority patent/CN105319944B/zh
Publication of EP2977833A1 publication Critical patent/EP2977833A1/de
Priority to HK16109417.8A priority patent/HK1221998A1/zh
Application granted granted Critical
Publication of EP2977833B1 publication Critical patent/EP2977833B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G04B29/00—Frameworks
    • G04B29/02—Plates; Bridges; Cocks
    • 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
    • G04B29/00—Frameworks
    • G04B29/04—Connecting or supporting parts

Definitions

  • the invention relates to a dismountable watchmaking assembly comprising at least one bridge arranged to be positioned on a plate by a first centering pin comprising a peripheral surface and a second alignment pin, which comprises said assembly and which are arranged to cooperate. with both said platen and said bridge.
  • the invention also relates to an exhaust mechanism comprising at least one such removable assembly.
  • the invention also relates to a watch movement comprising at least one such removable assembly and / or such an exhaust mechanism.
  • the invention also relates to a timepiece comprising at least one such removable assembly and / or such an escape mechanism and / or such a movement.
  • the invention relates to the field of timepieces, and more particularly watch mechanisms. It finds a particular application for the assembly of the components of the mechanisms whose assembly, positioning and alignment accuracies directly affect the chronometric performances, and especially in the case of an escape mechanism.
  • the invention relates to the positioning of bridges in a mechanism or a watch movement.
  • a bridge is positioned by two pins and held fixed by one or more screws.
  • the repeatability of the position thus obtained may be insufficient to ensure the proper operation of the mechanism.
  • escape wheel and anchor where, for the chronometric stability of the balance, the repeatability of the position may be insufficient to ensure the proper operation of the mechanism.
  • the variation of the position of the anchor modifies the center distances and the center line, which directly modifies the safety, the efficiency and the exhaust delay.
  • the invention proposes to define a bridge assembly on platinum which ensures the positioning accuracy, the alignment position, and which allows disassembly by disengagement and repositioning perfectly reproducible after retreading positioning elements.
  • the invention relates to a dismountable watchmaking assembly comprising at least one bridge arranged to be positioned on a plate by a first centering pin comprising a peripheral surface and a second alignment pin, which comprises said assembly and which are arranged to cooperate with both said plate and said bridge, characterized in that at least said plate or said bridge comprises, for the relative centering of said bridge with said plate, a centering female implantation which comprises two facets which form a dihedron ridge parallel to a direction of engagement, said first female implantation being arranged to receive said first pin bearing on said two facets by a first portion of said peripheral surface, and further characterized in that said assembly comprises first means catch-up devices which are arranged to exert, when said first pin is in bearing position on said two facets, a direct or indirect force on said first pin.
  • the invention also relates to an escapement mechanism comprising at least one such removable assembly, characterized in that said bridge is an anchor bridge or a pendulum bridge or a gear bridge.
  • the invention also relates to a watch movement comprising at least one such removable assembly and / or such an exhaust mechanism.
  • the invention also relates to a timepiece comprising at least one such removable assembly and / or such an escape mechanism and / or such a movement.
  • the invention proposes to define, for a mechanism or a clockwork movement, a bridge assembly on a platinum which guarantees the positioning accuracy, the alignment position, and which allows disassembly by disengagement and repositioning perfectly reproducible after retreading of positioning elements.
  • the invention relates to a dismountable watchmaking assembly 1 comprising at least one bridge 2, a plate 3, and for each such bridge, a first centering pin 6 and a second alignment pin 11.
  • Such a bridge 2 is arranged to be positioned on the plate 3 by a first centering pin 6 comprising a peripheral surface 60, and a second alignment pin 11, which are arranged to cooperate with both the plate 3 and the bridge 2.
  • At least the plate 3 or the bridge 2 comprises, for the relative centering of the bridge 2 with the plate 3, a female centering implantation 4 which comprises two facets 5 which form a dihedron 50 with a ridge parallel to a D engagement direction, and the first female implantation 4 being arranged to receive the first pin 6 bears on the two facets 5 by a first portion 61 of its peripheral surface 60.
  • this set 1 comprises first means of catching game 20 which are arranged to exert, when the first pin 6 is in the bearing position on the two facets 5, a direct or indirect force on the first pin 6.
  • these first play catching means 20 are arranged to exert, when the first pin 6 is in the support position on the two facets 5, in addition to the support on these facets 5, a force of thrust on only a second portion 62 of the peripheral surface 60, which is distinct from the first portion 61 resting on the dihedron 50, as visible on the figure 2 .
  • the pin is triangulated: free support in two distinct areas of first part 61 of its peripheral surface 60 on both facets 5, and plating force exerted on this second part 62.
  • the first game-catching means 20 exert this plating thrust force in a direction contained in this bisecting plane and parallel, as the case may be, to the plate 3 or to the bridge 2.
  • these first play-catching means 20 exert this plating thrust force in the vicinity of the bisecting plane of the dihedron 50.
  • the dihedron 50 may be of greater rigidity than that of the first pin 6, for example in the case of a bridge 2 made of silicon or the like, or conversely of inferior rigidity to that of the pin , especially in the usual case of a bridge 2 stamped brass or sheet steel combined with a pin hardened steel. Or even stiffness equal to that of the pin, when both are made of the same material.
  • the first play catching means 20 are internal to the first pin 6, which is an elastic pin or a cotter pin, and are arranged to press the second portion 62 on a face of thrust 51, that includes the centering female implantation 4, and which defines with these two facets 5 a chamber.
  • a chamber is of substantially triangular section.
  • each slot constitutes such first means of catch-up 20.
  • the carrier wall of the facets 5, which defines the centering accuracy advantageously has but not necessarily, a rigidity that is greater than that of the first pin 6.
  • the first pin 6 is a cotter pin as visible in particular on the Figures 2 to 4
  • the plate 3 or the bridge 2 which carries the centering female implantation 4 comprises mechanical indexing means 45 and / or visual for the indexing of a particular slot 65 of the first pin 6 for correct angular positioning of this first pin 6, as visible on the figure 8 .
  • the slot 65 is not median, but delimits two parts of different stiffness, such as visible on the figure 8 a more rigid first portion 68, for example over two-thirds of the section, carrying the first support part 61 on the facets 5, and a second part 69 which is smaller, for example, over a third of the section and comprising the second part 62 on which is exerted the thrust effort equal and opposite to the resulting support exerted on the facets 5.
  • the first play catching means 20 are external to the first pin 6, and comprise first elastic return means 7, which are arranged to exert a thrust force, or respectively of traction, either on the first pin 6 to press it against the two facets 5, or directly on the bridge 2 and / or on the plate 3.
  • the thrust face 51 belongs to a first elastic lip 41.
  • the thin partition forming an elastic lip 41 of the figure 7 is deformable under the action of an eccentric screw 49, the first pin 6i is pushed on facets V similar to those of the figure 2 it is understood that this provision is also applicable to the first embodiment where the first pin 6 is a split elastic pin.
  • Such an eccentric screw 49 may also, in a variant not illustrated, exert a direct bearing on the first pin 6.
  • the envelope surface of the peripheral surface 60 of the first pin 6 is symmetrical of revolution. This may concern both the second embodiment and the first slotted elastic pin mode, the envelope surface symmetry of revolution then concerning the free state of this pin.
  • the plate 3 comprises a housing bore of the first pin 6, and the bridge 2 comprises the centering female implantation 4.
  • both the plate 3 and the bridge 2 each comprise such a female centering implantation 4; it is then necessary that the means of catching play exert efforts of different intensity on one and the other.
  • the plate 3 and the bridge 2 are held together by at least one screw 90.
  • the bisecting plane of the dihedron 50 is preferably substantially parallel to the force generated by the tightening torque of the screw 90. and brought back to the facets 5, and the tightening torque C applied to the screw 90 tends to reinforce the support of the first pin 6 on the two facets 5.
  • the plate 3 or / and the bridge 2 further comprises a second alignment female implantation 8.
  • This second alignment female implantation 8 comprises at least one planar face 81 in an alignment direction DA, and which is arranged to receive a contact surface 110 of a second alignment pin 11 that carries respectively the bridge 2 or the plate 3.
  • the assembly 1 comprises second play-catching means 21, which are arranged to exert a thrust force on the second alignment pin 11 when it is in the support position on the flat face 81.
  • the alignment direction DA of the plane face 81 extends parallel to a plane defined by the positioning axes of the first pin 6 and the second pin 11.
  • the alignment direction DA of the plane face 81 may, again, extend orthogonally to the bisecting plane of the dihedron 50.
  • the second alignment female implantation 8 is a rectilinear female housing with parallel faces 81, 82, aligned in an alignment direction DA perpendicular to the engagement direction D.
  • This embodiment is mainly related to a machining convenience in case of machining the tool, because a single flat face 81 is sufficient for the implementation of the invention.
  • the second play-catching means 21 are internal to the second alignment pin 11 which is an elastic pin or cotter pin, and are arranged to press the contact surface 110 onto the flat face 81.
  • the second alignment pin 11 is a cotter pin, as visible on the figure 3
  • the plate 3 or the bridge 2 which carries the second alignment female implantation 8 comprises mechanical indexing means 85 and / or visual for the indexing of a particular slot 115 of the second alignment pin 11 for a correct angular positioning, to take advantage of the perfectly elastic deformation of the pin on which the force must be applied, as visible on the figure 10 .
  • the bearing wall of the plane face 81 which defines the alignment accuracy, advantageously but not necessarily has a rigidity which is greater than that of the second pin 11.
  • the envelope surface of the peripheral surface of the second alignment pin 11 is symmetrical of revolution. This may concern both the second embodiment and the first slotted elastic pin mode, the envelope surface symmetry of revolution then concerning the free state of this pin.
  • the plate 3 comprises a housing bore of the second alignment pin 11, and the bridge 2 comprises the second female alignment implantation 8.
  • both the plate 3 and the bridge 2 each comprise such a second female alignment implantation 8, but, as above in the case of the first centering pin 6, it is necessary that the the force applied on the platinum side is different from that applied on the bridge side.
  • the plate 3 and the bridge 2 are held together by at least one screw 90, and the screwing torque C applied to the screw 90 tends to reinforce the support of the second pin 11 on the flat face 81: no separation between the second alignment pin11 is the flat face is caused by the screwing of the screw 90.
  • the flat face 81 is preferably substantially perpendicular to the direction of l the force exerted by this flat face 81 on the second pin 11 during the tightening of the screw 90.
  • the position of the screw 90 is calculated for a maximum lever with respect to the facets 5 on the one hand, and to the flat face 81 on the other hand.
  • the bridge 2 is an anchor bridge or a pendulum bridge or a gear bridge.
  • the invention also relates to an escapement mechanism 100 comprising at least one such removable assembly, characterized in that said bridge is an anchor bridge or a balance bridge or a gear bridge.
  • the invention also relates to a watch movement 200 comprising at least one such removable assembly 1 and / or such an exhaust mechanism.
  • the invention also relates to a timepiece 300 comprising at least one such removable assembly 1 and / or such an escape mechanism 100 and / or such a movement 200. More particularly, this timepiece 300 is a watch.
  • the clearance of the clearance in the assembly of the bridge 2 with the pins 6 and 11 is based on a preload of the bridge 2 given by flexible parts.
  • the first pin 6 is in contact with a two-facet "V" dihedral 50 so as to remove two degrees of freedom at the bridge 2.
  • the second pin 11 is in contact with a second alignment female 8 with preferably only one useful contact face which is the flat face 81, so as to remove the last degree of freedom to the bridge 2 (the other three degrees of freedom being eliminated by the planar contact plane with the plate 3).
  • the placement and orientation of the female implantations are preferably made in such a way that the tightening operation of the first screw 90, which generates a torque C acting on the bridge 2, does not degrade the position of the bridge 2, and therefore the position of the pivoting component held by the bridge. For this, the flexible part must not be stressed when tightening the screw 90.
  • the dimensions of the flexible parts are designed so that the minimum force on the pins 6 and 11 makes it possible to keep the bridge 2 in its operating position, even without the tightening screw or screws.
  • the product of the minimum contact force on each pin and the coefficient of friction must correspond to the product of the weight of the bridge and a safety factor. This makes it possible to manipulate the movement without risking that the component falls.
  • Embodiments are described here for the specific case of an anchor bridge, but they are generalizable to other positioning components.
  • the first embodiment with cotter pins uses the pins as a flexible part, incorporating a slot on a portion of the pin which makes part of the pin flexible.
  • the flexible part has a thickness between 0.05 mm and 0.1 mm and a length L between 0.5 mm and 1 mm.
  • the figure 13 is a graph representing, on the ordinate, the driving forces of a bridge as a function of the displacement of the pin on the abscissa, for a clamping of 15 ⁇ m and for two different geometries of the flexible part.
  • the maximum stripping force (negative part) is less than 1 N which is satisfactory for easily dismounting the bridge without damaging the components (it is considered that the maximum stripping force not to be exceeded is 3 N, but for some smaller and regularly handled bridges like the anchor bridge, a maximum force of less than 1 N is recommended).
  • the figure 14 is a graph representing, on the ordinate, the driving forces of a bridge depending on the abscissa of the length of the flexible part, for a clamping of 15 ⁇ m, and for different geometrical parameters.
  • Curve C3 is the minimum stripping force.
  • the effective variant L is between 0.5 mm and 0.7 mm, and the thickness of the blade between 0.05 mm and 0.1 mm. With all the geometrical parameters used in this case, the anchor breakout force is satisfactory.
  • the figure 15 is a graph showing the yoke forces of a bridge based on the abscissa of the displacement of the pin, for three different sections of the spring, in this second embodiment.
  • the curve C1 corresponds to the force for a nominal section spring, the C2 curve for a minimum section spring, and the C3 curve for a maximum section spring.
  • the maximum stripping force (negative part) is much less than 1 N which is satisfactory to easily dismount the bridge without damaging the components.
  • This force is also sufficient insofar as it is greater than the weight of the bridge (about 0.1 gram-force) multiplied by a safety factor (10) which gives a minimum holding force of about 0.01 N for this example (this value is dependent on the mass of the bridge).
  • the figure 16 is a graph plotting the stripping / decoupling forces of a bridge based on the abscissa of the section of the springs mounted on the bridge in this second embodiment, in a variant that is effective for a section between 0.03 mm 2 and 0.05 mm 2 .
  • the anchor bridge release force is satisfactory (greater than 0.01 N and less than 3 N).
  • the invention has important advantages.
  • the invention is also interesting for all the bridges of a watch movement or a watch mechanism, and in particular the bridges which allow the precise positioning of a component in rotation or pivoting.
  • the invention is advantageous for the bridges which make it possible to position the components of the escapement, such as escape wheel, anchor, balance wheel.
  • the present invention is also advantageous for after-sales overhauls: indeed, the watchmaker who handles the bridge provided with such a positioning system without play is then assured of assembling the anchor bridge in a position identical to the initial position.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Connection Of Plates (AREA)
  • Adornments (AREA)
  • Clamps And Clips (AREA)
EP14177878.7A 2014-07-21 2014-07-21 Präzise Positionierung der Brücke einer Uhr Active EP2977833B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP14177878.7A EP2977833B1 (de) 2014-07-21 2014-07-21 Präzise Positionierung der Brücke einer Uhr
CN201510428774.9A CN105319944B (zh) 2014-07-21 2015-07-20 钟表条夹板或桥夹板的精确定位
HK16109417.8A HK1221998A1 (zh) 2014-07-21 2016-08-08 鐘錶條夾板或橋夾板的精確定位

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14177878.7A EP2977833B1 (de) 2014-07-21 2014-07-21 Präzise Positionierung der Brücke einer Uhr

Publications (2)

Publication Number Publication Date
EP2977833A1 true EP2977833A1 (de) 2016-01-27
EP2977833B1 EP2977833B1 (de) 2018-01-03

Family

ID=51210374

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14177878.7A Active EP2977833B1 (de) 2014-07-21 2014-07-21 Präzise Positionierung der Brücke einer Uhr

Country Status (3)

Country Link
EP (1) EP2977833B1 (de)
CN (1) CN105319944B (de)
HK (1) HK1221998A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2754522C1 (ru) * 2019-10-24 2021-09-02 Эта Са Мануфактюр Орложэр Сюис Устройство для выравнивания и установки, в частности для часового резонаторного механизма
US11275343B2 (en) 2017-12-19 2022-03-15 Omega Sa Adjustable timepiece assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3923086A1 (de) * 2020-06-12 2021-12-15 ETA SA Manufacture Horlogère Suisse Antriebsmodul für ein uhrwerk

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH106585A (fr) * 1923-09-11 1924-09-16 Tavannes Watch Co Sa Pilier de mouvement d'horlogerie.
US2229021A (en) * 1939-04-04 1941-01-14 William L Gilbert Clock Corp Dial back for clocks and the like
DE1275474B (de) * 1964-08-06 1968-08-14 Tissot Horlogerie Abstandspfeiler fuer ein Uhrwerksgestell
FR1590572A (de) * 1968-05-09 1970-04-20
EP1860511A1 (de) * 2006-05-23 2007-11-28 Christophe Claret SA Uhrwerk mit einer mobilen Brücke
EP2458454A1 (de) * 2010-11-25 2012-05-30 ETA SA Manufacture Horlogère Suisse Vorrichtung zum Positionieren einer Brückenschaltung auf einer Platine
CH705087A2 (fr) * 2011-06-06 2012-12-14 Hublot Sa Geneve Pièce d'horlogerie.

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH106585A (fr) * 1923-09-11 1924-09-16 Tavannes Watch Co Sa Pilier de mouvement d'horlogerie.
US2229021A (en) * 1939-04-04 1941-01-14 William L Gilbert Clock Corp Dial back for clocks and the like
DE1275474B (de) * 1964-08-06 1968-08-14 Tissot Horlogerie Abstandspfeiler fuer ein Uhrwerksgestell
FR1590572A (de) * 1968-05-09 1970-04-20
EP1860511A1 (de) * 2006-05-23 2007-11-28 Christophe Claret SA Uhrwerk mit einer mobilen Brücke
EP2458454A1 (de) * 2010-11-25 2012-05-30 ETA SA Manufacture Horlogère Suisse Vorrichtung zum Positionieren einer Brückenschaltung auf einer Platine
CH705087A2 (fr) * 2011-06-06 2012-12-14 Hublot Sa Geneve Pièce d'horlogerie.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11275343B2 (en) 2017-12-19 2022-03-15 Omega Sa Adjustable timepiece assembly
RU2754522C1 (ru) * 2019-10-24 2021-09-02 Эта Са Мануфактюр Орложэр Сюис Устройство для выравнивания и установки, в частности для часового резонаторного механизма
US11899404B2 (en) 2019-10-24 2024-02-13 Eta Sa Manufacture Horlogère Suisse Assembly and alignment device, particularly for a timepiece resonator mechanism

Also Published As

Publication number Publication date
CN105319944B (zh) 2018-02-13
CN105319944A (zh) 2016-02-10
HK1221998A1 (zh) 2017-06-16
EP2977833B1 (de) 2018-01-03

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