EP3396470B1 - Mechanische bremsvorrichtung für drehteil einer uhr - Google Patents

Mechanische bremsvorrichtung für drehteil einer uhr Download PDF

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Publication number
EP3396470B1
EP3396470B1 EP17167802.2A EP17167802A EP3396470B1 EP 3396470 B1 EP3396470 B1 EP 3396470B1 EP 17167802 A EP17167802 A EP 17167802A EP 3396470 B1 EP3396470 B1 EP 3396470B1
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EP
European Patent Office
Prior art keywords
braking
common axis
timepiece mechanism
braking component
arbor
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.)
Active
Application number
EP17167802.2A
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English (en)
French (fr)
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EP3396470A1 (de
Inventor
Ivan Villar
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.)
ETA SA Manufacture Horlogere Suisse
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ETA SA Manufacture Horlogere Suisse
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Application filed by ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to EP17167802.2A priority Critical patent/EP3396470B1/de
Priority to US15/935,618 priority patent/US10816933B2/en
Priority to JP2018059298A priority patent/JP6467541B2/ja
Priority to CN201810367679.6A priority patent/CN108732904B/zh
Publication of EP3396470A1 publication Critical patent/EP3396470A1/de
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Publication of EP3396470B1 publication Critical patent/EP3396470B1/de
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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
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G04B13/021—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft
    • G04B13/023—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft allowing rotational slipping when a threshold torque is exceeded
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G04B13/021—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G04B13/021—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft
    • G04B13/022—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft with parts made of hard material, e.g. silicon, diamond, sapphire, quartz and the like

Definitions

  • the invention relates to a clock mechanism comprising at least one structure in which at least one shaft of a mobile is pivoted along an axis of rotation, said mechanism comprising at least one braking device for mechanical braking with constant torque of a said tree.
  • the invention also relates to a timepiece movement comprising at least one such timepiece mechanism.
  • the invention also relates to a watch comprising at least one such movement and / or at least one such clockwork mechanism.
  • the invention relates to the field of clock mechanisms, in particular display mechanisms.
  • the angular play of the display mobiles translates into an unpleasant visual effect for the user, called quavering, as conventionally visible on a hand of a small second display with non-tensioned cog.
  • the document FR 1 124 446 A describes a clockwork mechanism in which an axis (2) is pivoted in a structure.
  • a constant torque braking device (8, 10) is provided, this device being mounted on said structure.
  • the invention proposes to reduce in a simple and economical way the angular play at the level of the display mobiles in a non-tensioned cog.
  • the invention relates to a clock mechanism according to claim 1.
  • the invention also relates to a timepiece movement comprising at least one such timepiece mechanism.
  • the invention also relates to a watch comprising at least one such movement and / or at least one such clockwork mechanism.
  • the invention relates to a clockwork mechanism 100 comprising at least one structure 20 in which at least one shaft 30 of a mobile 40 is pivoted along an axis of rotation D.
  • This mechanism 100 includes at least one braking device 10 for mechanical braking at constant torque of a shaft 30.
  • this braking device 10 comprises a braking component 1, which is removable with respect to the structure 20, and which comprises, for its attachment to the structure, a massive twill 2, which carries a plurality of elements elastic 3.
  • These elastic elements 3 are preferably identical and regularly distributed around a common axis AC around which these elastic elements 3 each have a contact area 4.
  • the contact areas 4 together define an opening 5, which is arranged to cooperate by driving and elastic tightening with a shaft 30, so as to make the common axis AC coincide with the axis of rotation D of the shaft 30, and to apply to the shaft 30 a substantially constant tangential braking force.
  • the tightening value on the shaft depends of course on the application. For current watchmaking applications, this tightening can be carried out between a weak tightening, of the order of 5 micrometers to the radius, and a strong tightening, of the order of 10 micrometers to the radius.
  • these elastic elements 3 can also, each, be a combination of elastic elements, not necessarily identical, nor necessarily evenly distributed around the common axis AC, but it is necessary that the result of the support forces that they exert on a shaft 30 is zero, and the torque distribution that they exert on this shaft 30 is regular.
  • the braking device 10 also comprises a positioning lock 6.
  • This lock 6 is designed to be fixed on an implantation 26 that comprises the structure 20, by trapping the braking component 1 so as to allow it an axial play limited to a limited axial value, in the direction of the common axis AC, and / or allow it an angular play limited to a bounded angular value, in a plane perpendicular to the common axis AC.
  • the braking component 1 is no longer packed in the structure 20, but positioned by this latch 6, which does not block the braking component 1.
  • the latch 6 leaves a degree of radial and axial freedom to the braking component 1, so that it self-centers and thus compensates for the geometric variations.
  • the braking component 1 comprises, in a plane perpendicular to the common axis AC, a fork 7.
  • This fork 7 is arranged to surround a range 9 of the lock 6 with a clearance corresponding to the bounded angular value.
  • An upper face 71 of this fork 7 is arranged to cooperate in abutment support with at least one lower face 81, which comprises a flange 8 of the lock 6, to limit the axial stroke of the braking component 1.
  • this flange 8 comprises, in a first direction, a narrow part of width LE less than the opening of the fork 7, to allow the insertion of the braking component 1 on the shaft 30 near the latch 7 fixed in a first angular position of insertion, on the structure 20.
  • the flange 8 comprises, in a second direction preferably but not limited to orthogonal to the first direction, a wide part, which is of width LL greater than the opening LO of the fork 7. This wide part carries the at least one lower face 81 which axially immobilizes the fork 7 in a second angular position for locking the lock 6.
  • the lock 6 can be simply driven out in the implantation 26 of the structure 20, in other variants it can be mounted screwed, or with a bayonet connection, or the like.
  • the axial play like the radial play, is preferably, and not limitatively, between 10 and 30 micrometers, more particularly between 15 and 25 micrometers.
  • the clamp 2 of the braking component 1 comprises, in a plane perpendicular to the common axis AC, hollow recesses 12, diametrically opposite two by two with respect to the common axis AC, and which are provided for handling of the braking component 1 by a robotic manipulator clamp, or even for easy gripping by the tweezers of an operator.
  • the braking component 1 can simply be placed on a bearing surface of the structure 20, on which it is preferably held by the latch 6.
  • the rim 2 of the braking component 1 comprises, in a plane perpendicular to the common axis AC, radial stops 11 which are arranged to cooperate in abutment of radial stop with a recess 21 that comprises the structure 20, to limit the radial stroke of the common axis AC relative to the axis of rotation D of the shaft 30. More particularly, these radial stops 11 are alternated with all or part of the clearances 12, when the braking component 1 has them.
  • a mobile 40 is a small second display mobile, the shaft of which is generally rolled and slightly conical.
  • the solution offered by the invention is well suited to this scenario, due to the moderate cost, the small footprint, the precision and the surface condition of the components present, and the easy mounting due to the cone of the mobile tree.
  • the structure 20 comprises a plurality of implantations, which are arranged for the pivoting of different shafts 30 of different mobiles 40, around a same implantation 26, which is arranged for receiving a lock 6 able to cooperate with a braking component 1 arranged on any one of the shafts 30.
  • the system makes it possible to manage different centers of small seconds, while using the same components.
  • the twill 2 of the braking component 1 has a peripheral surface which is arranged to, in a plane perpendicular to the common axis AC, cooperate tightly with a recess 21 that the structure 20 comprises.
  • the braking component 1 is in one piece and made of micro-machinable material, such as silicon, DLC, or the like. Manufacturing by a lithographic or similar process guarantees high geometric precision, and a good surface condition, which is above all repetitive.
  • the invention also relates to a timepiece movement 200 comprising at least one such timepiece mechanism 100.
  • a particular application of the invention relates to its application to a chronograph mechanism.
  • the invention also relates to a watch 300 comprising at least one such movement 200 and / or at least one such clockwork mechanism 100.
  • the use of a braking component, as described above, analogous to a washer with flexible arms rubbing on the pivot of a mobile, in particular of a small second wheel, is particularly advantageous, due to the reproducibility of the behavior of the mobile, due to the manufacturing process of the braking component.
  • the invention also takes advantage of the good geometric precision and the good surface condition induced by rolling. The variation in frictional force, which is prohibitive in the prior art, is reduced, or even eliminated, which induces a lesser variation in gait.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Braking Arrangements (AREA)
  • Electromechanical Clocks (AREA)

Claims (11)

  1. Uhrwerk (100) mit mindestens einer Konstruktion (20), in der mindestens eine Welle (30) eines Drehteils (40) entlang einer Rotationsachse (D) schwenkbar ist, wobei der Mechanismus (100) mindestens eine Bremsvorrichtung (10) zum mechanischen Bremsen bei konstantem Drehmoment einer Welle (30) umfasst, dadurch gekennzeichnet, dass die Bremsvorrichtung (10) eine Bremskomponente (1) umfasst, die in Bezug auf die Konstruktion (20) abnehmbar ist und die für ihre Befestigung an der Konstruktion einen massiven Radkranz (2) umfasst, der mehrere identische elastische Elemente (3) trägt, die gleichmäßig um eine gemeinsame Achse (AC) verteilt sind, um die herum die elastischen Elemente (3) jeweils einen Kontaktbereich (4) aufweisen, wobei die Kontaktbereiche (4) zusammen eine Öffnung (5) definieren, die so angeordnet ist, dass sie durch Drücken und elastisches Klemmen mit einer Welle (30) zusammenwirkt, um so die gemeinsame Achse (AC) mit der Drehachse (D) der Welle (30) zusammentreffen zu lassen und um auf die Welle (30) eine im Wesentlichen konstante tangentiale Bremskraft auszuüben.
  2. Uhrwerk (100) nach Anspruch 1, dadurch gekennzeichnet, dass die Bremsvorrichtung (10) ferner einen Positionierungsriegel (6) umfasst, der so angeordnet ist, dass er in einer Einpflanzung (26), die die Konstruktion (20) umfasst, durch Einklemmen der Bremskomponente (1) befestigbar ist, um ihr ein auf einen begrenzten axialen Wert begrenztes Axialspiel in Richtung der gemeinsamen Achse (AC) zu ermöglichen und/oder ihm ein auf einen begrenzten Winkelwert begrenztes Winkelspiel in einer Ebene senkrecht zu der gemeinsamen Achse (AC) zu ermöglichen.
  3. Uhrwerk (100) nach Anspruch 2, dadurch gekennzeichnet, dass die Bremskomponente (1) in einer Ebene senkrecht zur gemeinsamen Achse (AC) eine Gabel (7) umfasst, die angeordnet ist, um eine Spannweite (9) des Riegels (6) mit einem Spiel zu umgeben, das dem begrenzten Winkelwert entspricht, und wovon eine Oberseite (71) der Gabel (7) angeordnet ist, um mit mindestens einer Unterseite (81) abstützend zusammenzuwirken, die ein Kragen (8) des Riegels (6) aufweist, um den axialen Hub der Bremskomponente (1) zu begrenzen.
  4. Uhrwerk (100) nach Anspruch 3, dadurch gekennzeichnet, dass der Kragen (8) in einer ersten Richtung einen schmalen Teil der Breite aufweist, der kleiner ist als die Öffnung der Gabel (7), um das Einsetzen der Bremskomponente (1) auf die Welle (30) in der Nähe des Riegels (6) zu ermöglichen, die in einer ersten Winkeleinfügeposition befestigt ist an der Konstruktion (20), und in einer zweiten Richtung orthogonal zu der ersten Richtung einen dicken Teil der Breite aufweist, der größer ist als die Öffnung der Gabel (7), und mindestens eine untere Fläche (81) trägt, die die Gabel (7) in einer zweiten Winkelverriegelungsposition des Riegels (6) axial fixiert.
  5. Uhrwerk (100) nach einem der Ansprüche 2 bis 4, dadurch gekennzeichnet, dass der Radkranz (2) der Bremskomponente (1) in einer Ebene senkrecht zu der gemeinsamen Achse (AC) radiale Anschläge (11) aufweist, die so angeordnet sind, dass sie mit radialem Abstützanschlag mit einer Aussparung (21), die die Konstruktion (20) aufweist, zusammenwirken, um den radialen Weg der gemeinsamen Achse (AC) in Bezug auf die Rotationsachse (D) der Welle (30) zu begrenzen.
  6. Uhrwerk(100) nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass die Konstruktion (20) mehrere Einpflanzungen umfasst, die zum Schwenken verschiedener dieser Wellen (30) der genannten Drehteile (40) um die gleiche Einpflanzung (26) angeordnet sind, die zur Aufnahme eines Riegels (6) vorgesehen ist, der zum Zusammenwirken mit einer auf einer der Wellen (30) angeordneten Bremskomponente (1) vorgesehen ist.
  7. Uhrwerk (100) nach Anspruch 1, dadurch gekennzeichnet, dass der Radkranz (2) der Bremskomponente (1) eine äußere Spannweite aufweist, die so angeordnet ist, dass sie mit einer Aussparung (21), die die Konstruktion (20) aufweist, in einer Ebene senkrecht zu der gemeinsamen Achse (AC) klemmend zusammenwirkt.
  8. Uhrwerk (100) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Bremskomponente (1) aus einem Stück und aus mikrobearbeitbarem Material hergestellt ist.
  9. Uhrwerk (100) nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass ein genanntes Drehteil (40) ein Anzeigedrehteil der kleinen Sekunde ist.
  10. Uhrwerk (200) mit mindestens einem Uhrwerk (100) nach einem der Ansprüche 1 bis 9.
  11. Uhr (300) mit mindestens einem Uhrwerk (100) nach einem der Ansprüche 1 bis 9.
EP17167802.2A 2017-04-24 2017-04-24 Mechanische bremsvorrichtung für drehteil einer uhr Active EP3396470B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP17167802.2A EP3396470B1 (de) 2017-04-24 2017-04-24 Mechanische bremsvorrichtung für drehteil einer uhr
US15/935,618 US10816933B2 (en) 2017-04-24 2018-03-26 Mechanical braking device for timepiece wheel set
JP2018059298A JP6467541B2 (ja) 2017-04-24 2018-03-27 計時器車セットのための機械的制動デバイス
CN201810367679.6A CN108732904B (zh) 2017-04-24 2018-04-23 用于钟表轮副的机械制动装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17167802.2A EP3396470B1 (de) 2017-04-24 2017-04-24 Mechanische bremsvorrichtung für drehteil einer uhr

Publications (2)

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EP3396470A1 EP3396470A1 (de) 2018-10-31
EP3396470B1 true EP3396470B1 (de) 2020-01-01

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US (1) US10816933B2 (de)
EP (1) EP3396470B1 (de)
JP (1) JP6467541B2 (de)
CN (1) CN108732904B (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7170665B2 (ja) * 2017-12-20 2022-11-14 シチズン時計株式会社 指針の停止位置のばらつき低減機構
EP3667431A1 (de) * 2018-12-13 2020-06-17 Montres Breguet S.A. Mobile anzeigeeinheit einer uhr mit reibungsregulierungsmechanismus
EP3719583B1 (de) 2019-04-03 2021-11-10 ETA SA Manufacture Horlogère Suisse Mechanische bremsvorrichtung für triebfeder einer uhr
JP2023016727A (ja) 2021-07-22 2023-02-02 ロレックス・ソシエテ・アノニム ２つの時計部品を機械的に結合するリング
EP4242753A1 (de) 2022-03-11 2023-09-13 ETA SA Manufacture Horlogère Suisse Vorrichtung zum führen einer welle einer unruh mit spiralfeder
EP4242752A1 (de) 2022-03-11 2023-09-13 ETA SA Manufacture Horlogère Suisse Vorrichtung zum führen einer welle einer unruh mit spiralfeder

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CH271694A (fr) 1948-04-21 1950-11-15 Edmond Dubois & Fils Raquetterie.
CH376057A (fr) 1961-11-16 1963-11-30 Manuf De Montres Et Chronometr Raquetterie de pièce d'horlogerie
EP2945028A1 (de) 2014-05-16 2015-11-18 Manufacture et fabrique de montres et chronomètres Ulysse Nardin Le Locle SA Stoßdämpfendes Lager
EP3382472A1 (de) 2017-03-30 2018-10-03 Rolex Sa Führungslager einer unruhwelle einer uhr

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EP2112565B1 (de) * 2008-04-21 2010-10-20 Rolex Sa Mikromechanisches Bauteil mit Öffnung zur Befestigung auf einer Achse
EP2701014A1 (de) * 2012-08-21 2014-02-26 Rolex Sa Kupplungswippe und Kupplungsvorrichtung für Uhrmechanismus
EP2793087B1 (de) * 2013-04-18 2016-06-01 Glashütter Uhrenbetrieb GmbH Tourbillon
EP2957963B1 (de) * 2014-06-18 2017-10-25 ETA SA Manufacture Horlogère Suisse Drehteil einer Uhr
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EP3106931A1 (de) * 2015-06-16 2016-12-21 Nivarox-FAR S.A. Werkstück mit entkoppelter schweissoberfläche
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CH271694A (fr) 1948-04-21 1950-11-15 Edmond Dubois & Fils Raquetterie.
CH376057A (fr) 1961-11-16 1963-11-30 Manuf De Montres Et Chronometr Raquetterie de pièce d'horlogerie
EP2945028A1 (de) 2014-05-16 2015-11-18 Manufacture et fabrique de montres et chronomètres Ulysse Nardin Le Locle SA Stoßdämpfendes Lager
EP3382472A1 (de) 2017-03-30 2018-10-03 Rolex Sa Führungslager einer unruhwelle einer uhr

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ANONYMOUS: "Movement 4130", ROLEX, 2000, XP055739553, Retrieved from the Internet <URL:https://www.rolex.com/fr/about-rolex-watches/2000-2013.html>
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Also Published As

Publication number Publication date
JP6467541B2 (ja) 2019-02-13
US10816933B2 (en) 2020-10-27
EP3396470A1 (de) 2018-10-31
JP2018185293A (ja) 2018-11-22
CN108732904B (zh) 2020-03-27
CN108732904A (zh) 2018-11-02
US20180307183A1 (en) 2018-10-25

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