EP2863272B1 - Hemmungsmechanismus für Uhrwerk einer Armbanduhr - Google Patents

Hemmungsmechanismus für Uhrwerk einer Armbanduhr Download PDF

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Publication number
EP2863272B1
EP2863272B1 EP13188951.1A EP13188951A EP2863272B1 EP 2863272 B1 EP2863272 B1 EP 2863272B1 EP 13188951 A EP13188951 A EP 13188951A EP 2863272 B1 EP2863272 B1 EP 2863272B1
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EP
European Patent Office
Prior art keywords
escapement mechanism
mechanism according
profile
fork
impulse
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
EP13188951.1A
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English (en)
French (fr)
Other versions
EP2863272A1 (de
Inventor
Benoît Junod
Sylvain Maréchal
Polychronis Karapatis (Nakis)
Davide Sarchi
Stéphane Beugin
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
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Montres Breguet SA
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Publication date
Application filed by Montres Breguet SA filed Critical Montres Breguet SA
Priority to EP13188951.1A priority Critical patent/EP2863272B1/de
Priority to JP2014206914A priority patent/JP6040209B2/ja
Priority to CN201410543900.0A priority patent/CN104570685B/zh
Publication of EP2863272A1 publication Critical patent/EP2863272A1/de
Priority to HK15110474.7A priority patent/HK1209853A1/xx
Application granted granted Critical
Publication of EP2863272B1 publication Critical patent/EP2863272B1/de
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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
    • G04B15/00—Escapements
    • G04B15/06—Free escapements
    • G04B15/08—Lever escapements
    • 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
    • G04B15/00—Escapements
    • G04B15/14—Component parts or constructional details, e.g. construction of the lever or the escape wheel

Definitions

  • the present invention relates to an escapement mechanism for a watch movement, in particular an escapement of the Swiss lever or English lever type.
  • the invention relates more particularly to the optimization of the assembly formed by the plate pin and the fork of the anchor.
  • the assembly made up of the plate pin and the anchor fork allows the anchor to be released from a tooth of the escape mechanism wheel and the balance wheel thrust.
  • the plate pin which is linked to the balance, and the fork of the anchor, allow the transmission of energy from the anchor to the balance at each alternation.
  • a conventional system consists of a so-called "half-moon" circular ankle with part of the circle which is removed to allow the ankle to enter the inside of the range with sufficient security.
  • the fork is in the form of a rectangular notch, the contact surfaces with the ankle being flat.
  • the optimization of the geometry of the contact surfaces between the pin and the fork aims in particular to reduce the friction in order to reduce the wear of the parts, or even to reduce the energy losses to increase the efficiency of the exhaust.
  • An object of the invention is to provide a precise and reliable watch escapement mechanism over a long period of use.
  • a watch escapement mechanism for a watch movement comprises an anchor with a fork and a plate device with a peg coupled to a balance, the fork comprising a first horn and a second horn.
  • the pin includes a first cam portion configured to engage an engagement surface of the first horn, and a second cam portion configured to engage an engagement surface of the second. horn.
  • the engagement surfaces contacting the cam portions - that is, the active surfaces - include a non-planar geometric profile, configured to reduce slip during release and pulse functions.
  • Each of the engagement surfaces has a geometric profile defined by a discontinuous function in its first or second derivative.
  • the first horn in one direction of rotation of the balance the first horn functions as an input horn and the second horn as an output horn, and in the opposite direction the first horn functions as a horn. exit and the second horn as the entrance horn.
  • the invention also extends to escapement mechanisms having a single release and impulse per round-trip cycle of the balance, and in this case one of the horns functions only as an input horn and the 'other only as an exit horn.
  • the engagement surface may comprise a first portion and a second portion, the first and second portions being interconnected by a surface portion not coming into contact with the cam portions of the ankle.
  • the cam surfaces and the engagement surfaces are configured such that the first portion of the input horn engagement surface at least partially performs a function of releasing a pallet from the anchor, and the second portion of the engagement surface of the exit horn at least in part operates a function of the impulse of said anchor vane.
  • the second portion of the engagement surface of the inlet horn at least partly also operates a function of disengaging said pallet from the anchor.
  • the first portion of the engagement surface of the exit horn at least partly also operates a function of impulse of said pallet of the anchor.
  • the engagement surfaces comprise two portions, each portion having a geometric profile defined by a continuous function in its first or second derivative, configured so that the first portion of each engagement surface primarily performs a release function. an anchor vane, and that the second portion of each engagement surface primarily operates a function of an anchor vane.
  • each of the cam parts of the peg comprises a geometric profile defined by a discontinuous function in its first or second derivative.
  • a portion of the cam portions never comes into contact with the engagement surfaces.
  • the cam portions comprise two portions, each portion having a geometric profile defined by a continuous function in its first or second derivative, configured so that the first portion of each engagement surface primarily performs a release function. an anchor vane, and that the second portion of each engagement surface primarily operates a function of a pulse of an anchor vane.
  • the geometric profiles of the engagement surfaces and the cam portions of the pin may include at least a portion corresponding to a cog tooth profile.
  • the engagement surfaces of the fork contacting the ankle may be symmetrical about a midplane of the fork.
  • the cam surfaces on one side of the peg may be symmetrical to the cam surfaces on the other side of the peg in order to have identical engagement between the pin and the fork in both directions of rotation of the balance.
  • the fork can advantageously be produced by a deposition process such as by photolithography, or by other manufacturing processes used in the semiconductor industry, in a silicon-based material. This makes it possible to obtain profiles of surfaces of complex shapes with great precision.
  • the geometric profile of the engagement surface comprises a gear train profile.
  • the peg can advantageously also include a complementary cog profile.
  • the cog profile is an involute profile of a circle.
  • This profile can be automatically defined by specifying values of the modulus (for example 0.2) and of the number of equivalent virtual "teeth" that the anchor and the anchor would have (for example respectively 6 and 21) if they were part of a cog.
  • the cog profile is a profile according to the NIHS standard (Swiss Watch Industry Standard), for example the NIHS 20-25 standard, version 2002.
  • the ankle can include a conventional shape, such as a half-moon shape.
  • the peg may, however, include other optimized profiles to complement the profile of the engaging surfaces to eliminate or minimize slippage during release and impulse contacts.
  • an escape mechanism for a watch movement comprises a wheel 5 with teeth 9, an anchor 7, and a plate device 4 coupled to a balance 2.
  • the anchor comprises, a fork 13, paddles 17a, 17b, and a rod 15 interconnecting the paddles to the fork.
  • the rod is rotatably coupled to the frame of a movement by means of a pivot 11.
  • the paddles engage the teeth 9 of the wheel which is connected to a power source providing rotational torque to the wheel.
  • One pallet constitutes the entry pallet 17a and the other constitutes the exit pallet 17b.
  • the anchor comprises a dart 27 fixed on the fork by means for example of a pin driven into a fixing hole at the base of the fork.
  • the mechanism shown corresponds to a Swiss lever type escapement. This principle being well known, the conventional elements and their operation will not be described in more detail herein.
  • the plate device 4 comprises a large plate 6 with a pin 10 and a small plate 8 provided with a notch for the passage of the stinger.
  • the pin 10 comprises on one side a first cam part 12 and on the other side a second cam part 14.
  • first cam part 12 functions as an input cam
  • second cam part as an output cam.
  • the balance having an oscillating movement, in the other direction of rotation (second alternation) the functions of the first and second cam parts are reversed.
  • the fork 13 comprises a first horn 19 and a second horn 21.
  • first alternation the first horn 19 functions as an input horn and the second horn as an output horn.
  • second alternation the functions of the first and second horns are reversed.
  • the first cam portion 12 of the peg is configured to engage an engaging surface 23 of the first horn, and a second cam portion 14 is configured to engage an engagement surface 25 of the second horn.
  • the engagement surfaces contacting the cam portions include a non-planar geometric profile.
  • the engagement surfaces 23, 25 include a first portion 23a, 25a and a second portion 23b, 25b, the first and second portions being interconnected by an intermediate surface portion 23c not contacting the cam portions of ankle.
  • Each portion of the engagement surfaces can include a geometric profile defined by a continuous function in its first or second derivative.
  • the engagement surfaces can be configured so that the first portion of each engagement surface primarily performs a function of disengaging a pallet from the anchor, and the second portion of each engagement surface primarily performs a function of releasing a pallet from the anchor, and the second portion of each engaging surface primarily performs a function of releasing a pallet from the anchor. pulse of a pallet from the anchor.
  • each of the cam parts of the ankle comprises a geometric profile defined by a discontinuous function in its first or second derivative.
  • An intermediate portion of the cam portions never comes into contact with the engagement surfaces.
  • the cam portions may include two portions, each portion having a geometric profile defined by a continuous function in its first or second derivative, configured so that the first portion of each engagement surface primarily performs a function of clearing a pallet. the anchor, and that the second portion of each engagement surface primarily operates a function of the pulse of a pallet of the anchor.
  • One aspect of this invention is the use of adapted, curved and simultaneously optimized tooth profiles of the active surfaces, i.e. the contact surfaces, the pin and the fork of the anchor.
  • Different types of profile can be adapted to the pegs and fork depending on the point of the escapement and the frequency of the oscillator.
  • two types of specific cogs can advantageously be used:
  • This profile is automatically defined as a function of the modulus (eg modulus 0.2) and the number of teeth of the pinion and the wheel (eg 6 and 21 respectively).
  • the mechanism according to the invention is particularly advantageous for oscillators with a relatively low frequency, for example less than or equal to 4 Hz, and having a high inertia, for example greater than 10 mg cm2, and / or equipped with a system for shortening the catching the anchor.
  • the figure 3 illustrates the abrasion work as a function of the curvilinear abscissa of the surface of the fork in contact with the ankle for three types of geometries: (i) circular ankle and traditional fork, (ii) NIHS profile and (iii) profile in involute of circle.
  • the abrasion work for the NIHS and involute profiles is reduced by a factor of about three at the start of the function compared to the traditional profile. It follows that the energy transmitted to the balance (and therefore the regulating power) can be higher without introducing an additional risk of wear.
  • the figure 4 illustrates the torque given to the balance as a function of its position during the first impulse function for the three types of geometries: (i) circular pin and traditional fork, (ii) NIHS profile and (iii) involute profile circle.
  • the optimized profiles make it possible to transmit almost the same torque to the balance but over a higher angular interval (from 1 ° to 3 ° additional).
  • the total energy transmitted to the balance (integrals of the curves) during the first pulse of the first half wave is therefore greater than or equal using these profiles.
  • the transmission properties of each of the solutions are used in the pulse phase where they are the most effective.
  • the principle of this third solution is to combine at least two types of profile for the fork but also for the plate peg.
  • the contact during the first part of the pulse is made on a first type of profile with less sliding and the contact during the second part is made on another profile.
  • the first part of the impulse ( figure 5a ) is carried out for example with an involute type profile of a circle while the second part ( figure 5b ) is carried out with a traditional fork / peg geometry (circular peg and flat fork).
  • the invention can also be used in escapements with English type anchors, coaxial or other escapements of known types.
  • the advantages of the invention include a reduction in the risk of wear at the level of the ankle, in particular for systems with rapid anchor-balance adjustment, and the possibility of simultaneously increasing the torque available at the anchor and the angular interval. impulse (thus the energy transmitted to the movement) without increasing the risk of wear.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Micromachines (AREA)
  • Table Equipment (AREA)

Claims (14)

  1. Hemmungsmechanismus (3) für ein Werk einer tragbaren Uhr, umfassend einen Anker (7) mit einer Gabel (13) und eine Hebelscheibenvorrichtung (4) mit einem mit einer Unruh (2) gekoppelten Hebelstein, wobei die Gabel ein erstes Horn (19) und ein zweites Horn (21) aufweist, der Hebelstein einen ersten Nockenteil (12), der zum Eingriff mit einer Eingriffsfläche (23) des ersten Horns konfiguriert ist, und einen zweiten Nockenteil (14), der zum Eingriff mit einer Eingriffsfläche (25) des zweiten Horns konfiguriert ist, umfasst, und die mit den Nockenteilen in Kontakt gelangenden Eingriffsflächen ein nicht ebenes geometrisches Profil aufweisen, wobei der Mechanismus dadurch gekennzeichnet ist, dass jede der Eingriffsflächen (23, 25) ein geometrisches Profil besitzt, das durch eine in ihrer ersten oder zweiten Ableitung diskontinuierliche Funktion definiert ist.
  2. Hemmungsmechanismus nach dem vorhergehenden Anspruch, wobei mindestens ein Zwischenabschnitt (23c, 25c) der Eingriffsflächen niemals mit den Nockenteilen des Hebelsteins in Eingriff gelangt.
  3. Hemmungsmechanismus nach Anspruch 2, dadurch gekennzeichnet, dass die Eingriffsflächen zwei Abschnitte (23a, 23b; 25a, 25b) aufweisen, wobei jeder Abschnitt ein geometrisches Profil aufweist, das durch eine in ihrer ersten oder zweiten Ableitung kontinuierliche Funktion definiert ist, und die so konfiguriert sind, dass der erste Abschnitt (23a, 25a) jeder Eingriffsfläche insbesondere die Freigabefunktion einer Ankerpalette bewirkt, und dass der zweite Abschnitt (23b, 25b) jeder Eingriffsfläche insbesondere dazu dient, einer Ankerpalette einen Impuls zu verleihen.
  4. Hemmungsmechanismus nach Anspruch 1, dadurch gekennzeichnet, dass jeder der Nockenteile (12, 14) des Hebelsteins ein geometrisches Profil aufweist, das durch eine in ihrer ersten oder zweiten Ableitung diskontinuierliche Funktion definiert ist.
  5. Hemmungsmechanismus nach dem vorhergehenden Anspruch, wobei mindestens ein Abschnitt der Nockenteile niemals mit den Eingriffsflächen (23, 25) in Kontakt gelangt.
  6. Hemmungsmechanismus nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass die Nockenteile zwei Abschnitte aufweisen, wobei jeder Abschnitt ein geometrisches Profil aufweist, das durch eine in ihrer ersten oder zweiten Ableitung kontinuierliche Funktion definiert ist, und die so konfiguriert sind, dass der erste Abschnitt (23a, 25a) jeder Eingriffsfläche insbesondere die Freigabefunktion einer Ankerpalette bewirkt, und dass der zweite Abschnitt (23b, 25b) jeder Eingriffsfläche insbesondere dazu dient, einer Ankerpalette einen Impuls zu verleihen.
  7. Hemmungsmechanismus nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die geometrischen Profile der Eingriffsflächen (23, 25) und der Nockenteile des Hebelsteins (12, 14) mindestens einen Teil aufweisen, der einem Räderwerk-Zahnprofil entspricht.
  8. Hemmungsmechanismus nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, dass das Räderwerkprofil ein Kreisevolventenprofil ist.
  9. Hemmungsmechanismus nach Anspruch 7, dadurch gekennzeichnet, dass das Räderwerkprofil ein Profil gemäß der Norm NIHS 20-25, Version 2002, ist.
  10. Hemmungsmechanismus nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der erste Nockenteil zu dem zweiten Nockenteil symmetrisch ist.
  11. Hemmungsmechanismus nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Gabel und der Hebelstein aus einem Material auf der Basis von Silicium oder eines Siliciumderivats hergestellt sind.
  12. Hemmungsmechanismus nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Gabel und der Hebelstein durch ein Fotolithografieverfahren oder durch ein LIGA-Verfahren hergestellt werden.
  13. Hemmungsmechanismus nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Gabel und der Hebelstein aus einem Material auf Nickelbasis hergestellt sind.
  14. Werk einer tragbaren Uhr, umfassend einen Hemmungsmechanismus nach einem der vorhergehenden Ansprüche.
EP13188951.1A 2013-10-16 2013-10-16 Hemmungsmechanismus für Uhrwerk einer Armbanduhr Active EP2863272B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP13188951.1A EP2863272B1 (de) 2013-10-16 2013-10-16 Hemmungsmechanismus für Uhrwerk einer Armbanduhr
JP2014206914A JP6040209B2 (ja) 2013-10-16 2014-10-08 計時器ムーブメント用のエスケープ機構
CN201410543900.0A CN104570685B (zh) 2013-10-16 2014-10-15 用于钟表机心的擒纵机构
HK15110474.7A HK1209853A1 (en) 2013-10-16 2015-10-26 Escapement mechanism for a watch movement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13188951.1A EP2863272B1 (de) 2013-10-16 2013-10-16 Hemmungsmechanismus für Uhrwerk einer Armbanduhr

Publications (2)

Publication Number Publication Date
EP2863272A1 EP2863272A1 (de) 2015-04-22
EP2863272B1 true EP2863272B1 (de) 2020-11-25

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EP13188951.1A Active EP2863272B1 (de) 2013-10-16 2013-10-16 Hemmungsmechanismus für Uhrwerk einer Armbanduhr

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EP (1) EP2863272B1 (de)
JP (1) JP6040209B2 (de)
CN (1) CN104570685B (de)
HK (1) HK1209853A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018002778A1 (fr) * 2016-06-29 2018-01-04 Patek Philippe Sa Geneve Mouvement d'horlogerie mecanique
JP7485506B2 (ja) * 2018-10-12 2024-05-16 ロレックス・ソシエテ・アノニム 小型時計ムーブメント用の調速装置
EP4194959A1 (de) * 2021-12-09 2023-06-14 Montres Breguet S.A. Natürliche hemmung für uhrwerk und uhrwerk, das eine solche uhrhemmung umfasst

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1523856A1 (de) * 1966-06-11 1969-11-13 Unterwagner Dipl Ing Emil Ankergabel mit breitem Einschnitt fuer Ankerhemmungen
CH1512670A4 (de) * 1970-10-13 1973-03-30
EP1319997B1 (de) * 2001-12-15 2010-05-26 Richemont International S.A. Konstantkraftvorrichtung
EP1538490B1 (de) * 2003-12-04 2007-05-30 Montres Breguet S.A. Chronometerhemmung für Armbanduhren
EP1580625A1 (de) * 2004-03-23 2005-09-28 Asulab S.A. Vorrichtung und Verfahren zur Fixierung einer Palette auf einem Hemmungsanker in einem Uhrwerk
CH702930A2 (fr) * 2010-04-01 2011-10-14 Patek Philippe Sa Geneve Echappement d'horlogerie à protection contre les chocs.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
HK1209853A1 (en) 2016-04-08
JP6040209B2 (ja) 2016-12-07
JP2015078981A (ja) 2015-04-23
EP2863272A1 (de) 2015-04-22
CN104570685B (zh) 2017-07-11
CN104570685A (zh) 2015-04-29

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