EP2863272A1 - Hemmungsmechanismus für Uhrwerk einer Armbanduhr - Google Patents

Hemmungsmechanismus für Uhrwerk einer Armbanduhr Download PDF

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Publication number
EP2863272A1
EP2863272A1 EP20130188951 EP13188951A EP2863272A1 EP 2863272 A1 EP2863272 A1 EP 2863272A1 EP 20130188951 EP20130188951 EP 20130188951 EP 13188951 A EP13188951 A EP 13188951A EP 2863272 A1 EP2863272 A1 EP 2863272A1
Authority
EP
European Patent Office
Prior art keywords
exhaust mechanism
mechanism according
anchor
fork
horn
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
EP20130188951
Other languages
English (en)
French (fr)
Other versions
EP2863272B1 (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
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 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
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
    • 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 of a watch movement, in particular an escapement of Swiss anchor or anchor type.
  • the invention relates more particularly to the optimization of the assembly constituted by the plate pin and the fork of the anchor.
  • the assembly constituted by the anchor plate and the fork of the anchor allows the release of the anchor of a tooth of the wheel of the escape mechanism and the pulse of the balance.
  • the plate pin which is connected 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 a portion of the circle that is removed to allow the ankle to enter the fork with sufficient security.
  • the fork is in the form of a rectangular notch, the contact surfaces with the peg being flat.
  • the amplitude of rotation of the anchor and the position of its axis of rotation, or other dimensions there is inevitably some slippage between the ankle and the fork in conventional systems.
  • the surfaces in contact between the fork and the peg are identical for the clearance and for the impulse, namely, the pair of surfaces in contact during the release of the first alternation is identical to the pair of surfaces in contact during the impulse of the second alternation.
  • a geometry that would be optimized for the release function might not be optimized for the pulse function. In conventional systems, the geometry of the ankle and fork assembly is therefore not optimized.
  • the optimization of the geometry of the contact surfaces between the ankle and the fork aims in particular to reduce friction in order to reduce the wear of the parts, or 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 exhaust mechanism over a long period of use.
  • a watch exhaust mechanism for a watch movement comprises an anchor with a fork and a tray device with a peg coupled to a rocker, the fork comprising a first horn and a second horn.
  • the plug 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 engaging the cam portions - i.e. the active surfaces - comprise a non-planar geometric profile, configured to reduce slippage during release functions. and impulse.
  • the first horn in a direction of rotation of the balance the first horn functions as the input horn and the second horn as the output horn, and in the opposite direction the first horn functions as a horn exit and the second horn as the input horn.
  • the invention also extends to escape mechanisms having a single clearance and pulse per cycle of round-trip of the balance, and in this case one of the horns functions only as an input horn and the other only as an output 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 contact surface is discontinuous (includes a jump).
  • the cam surfaces and engagement surfaces are configured so that the first portion of the engagement surface of the input horn operates at least in part a release function of one pallet of the anchor, and the second portion of the engagement surface of the output horn operates at least in part a pulse function of said pallet of the anchor.
  • the second portion of the engagement surface of the input horn operates at least in part also a release function of said pallet of the anchor.
  • the first portion of the engagement surface of the output horn operates at least in part also a pulse function 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 operates primarily a release function. a pallet of the anchor, and that the second portion of each engagement surface operates primarily a pulse function of a pallet of the anchor.
  • each of the cam portions of the peg includes a geometric profile defined by a discontinuous function in its first or second derivative. In a variant, a portion of the cam portions never come 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 operates primarily a clearance function. a pallet of the anchor, and that the second portion of each engagement surface operates primarily a pulse function of a pallet of the anchor.
  • the geometric profiles of the engagement surfaces and the cam portions of the dowel may comprise at least a portion corresponding to a tooth profile of a cog.
  • the engagement surfaces of the fork engaging the ankle may be symmetrical with respect to a median plane of the fork.
  • the cam surfaces on one side of the ankle may be symmetrical to the cam surfaces on the other side of the ankle to have an identical engagement between the ankle and the fork in the two directions of rotation of the balance.
  • the range may advantageously be achieved by a deposition process such as photolithography, or by other manufacturing methods used in the semiconductor industry, of a silicon-based material. This makes it possible to obtain surface profiles of complex shapes with great precision.
  • the geometric profile of the engagement surface comprises a gear profile.
  • the peg may advantageously also comprise a complementary gear profile.
  • the gear profile is an involute profile of a circle.
  • This profile can be automatically defined by specifying values of the module (for example 0.2) and the number of virtual "teeth" equivalent that would have the ankle and anchor (for example respectively 6 and 21) if they were part of a train.
  • the gear profile is a profile according to the NIHS standard (Swiss Watch Industry Standard), for example the NIHS20-25 standard.
  • the ankle may include a conventional shape, such as a half-moon shape.
  • the ankle may, however, include other profiles optimized in complementarity with the profile of the engagement surfaces to eliminate or minimize sliding during release and pulse 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 rocker 2.
  • the anchor comprises, a fork 13, vanes 17a, 17b, and a rod 15 interconnecting the vanes with the fork.
  • the rod is rotatably coupled to the frame of a movement by means of a pivot 11.
  • the vanes engage the teeth 9 of the wheel which is connected to a power source providing a torque on the wheel.
  • One pallet forms the entry pallet 17a and the other constitutes the exit pallet 17b.
  • the anchor comprises a stinger 27 fixed on the fork by means for example of a shaft driven into a fixing hole at the base of the fork.
  • the illustrated mechanism corresponds to an escapement of Swiss anchor type. As this principle is well known, the conventional elements and their operation will not be described in more detail here.
  • the tray device 4 comprises a large plate 6 with an anchor 10 and a small plate 8 provided with a notch 16 for the passage of the stinger.
  • the pin 10 comprises on one side a first cam portion 12 and on the other side a second cam portion 14.
  • the first cam portion 12 functions as the input cam and the second cam portion as the output cam.
  • the rocker 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 horn of entry and the second horn like horn of exit.
  • second alternation the functions of the first and second horns are reversed.
  • the first cam portion 12 of the ankle 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.
  • Engagement surfaces engaging the cam portions include a non-planar geometric profile.
  • the engaging surfaces 23, 25 comprise 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 coming into contact with the cam portions of ankle. There is therefore a discontinuity (a jump) in the surfaces of the ankle and the fork coming into contact.
  • Each portion of the engagement surfaces may comprise a geometric profile defined by a continuous function in its first or second derivative.
  • the engagement surfaces may be configured so that the first portion of each engagement surface operates primarily a release function of a pallet of the anchor, and that the second portion of each engagement surface operates primarily a function of impulse of a pallet of the anchor.
  • each of the cam portions of the peg 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 can 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 operates primarily a release function of a pallet. the anchor, and that the second portion of each engagement surface operates primarily a pulse function 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. contact surfaces, ankle and anchor fork.
  • Different typologies of profile can be adapted to the dowels and fork depending on the pointing of the exhaust and the frequency of the oscillator.
  • two types of specific gear wheels can advantageously be used:
  • This profile is automatically defined according to the module (for example module 0.2) and the numbers of teeth of the pinion and the wheel (for example 6 and 21 respectively).
  • the mechanism according to the invention is particularly advantageous for oscillators with relatively low frequency, for example less than or equal to 4 Hz, and having a high inertia, for example greater than 10 mg cm 2, and / or equipped with a shortening system. 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 range, (ii) NIHS profile and (iii) profile in involute circle.
  • the abrasion work for NIHS and circle-involute profiles is reduced by a factor of about three at the beginning 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 according to the position of the latter during the first pulse function for the three types of geometries: (i) circular ankle and traditional range, (ii) NIHS profile and (iii) involute profile circle.
  • the optimized profiles make it possible to transmit almost the same torque to the balance wheel but to a higher angular interval (from 1 ° to 3 ° additional).
  • the total energy transmitted to the pendulum (integral curves) during the first pulse of the first alternation is therefore greater 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 range but also for the plateau pin.
  • the contact during the first part of the pulse is effected on a first type of profile with less sliding and the contact during the second part is performed on another profile.
  • the first part of the impulse ( figure 5a ) is performed for example with an involute profile of circle while the second part ( figure 5b ) is made with traditional fork / pin geometry (circular peg and flat fork).
  • the invention can also be used in escapements with anchors of English type, coaxial or other escapements of known types.
  • the advantages of the invention include a reduction in the risk of wear at the ankle, in particular for anchor-pendulum quick-catch systems, 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)
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 true EP2863272A1 (de) 2015-04-22
EP2863272B1 EP2863272B1 (de) 2020-11-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
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)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3637195A1 (de) * 2018-10-12 2020-04-15 Rolex Sa Regulierungsvorrichtung für uhrwerk
EP3479175B1 (de) * 2016-06-29 2022-11-09 Patek Philippe SA Genève Mechanisches uhrwerk

Citations (3)

* 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
CH543757A (fr) * 1970-10-13 1973-03-30 Ebauches Bettlach Sa Echappement à ancre pour mouvement d'horlogerie
WO2011121432A1 (fr) * 2010-04-01 2011-10-06 Patek Philippe Sa Geneve Echappement d'horlogerie a protection contre les chocs

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE50115494D1 (de) * 2001-12-15 2010-07-08 Richemont Int Sa Konstantkraftvorrichtung
ATE363673T1 (de) * 2003-12-04 2007-06-15 Montres Breguet Sa 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

Patent Citations (3)

* 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
CH543757A (fr) * 1970-10-13 1973-03-30 Ebauches Bettlach Sa Echappement à ancre pour mouvement d'horlogerie
WO2011121432A1 (fr) * 2010-04-01 2011-10-06 Patek Philippe Sa Geneve Echappement d'horlogerie a protection contre les chocs

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3479175B1 (de) * 2016-06-29 2022-11-09 Patek Philippe SA Genève Mechanisches uhrwerk
EP3637195A1 (de) * 2018-10-12 2020-04-15 Rolex Sa Regulierungsvorrichtung für uhrwerk
US11520293B2 (en) 2018-10-12 2022-12-06 Rolex Sa Regulator device for a watch movement

Also Published As

Publication number Publication date
CN104570685A (zh) 2015-04-29
JP2015078981A (ja) 2015-04-23
EP2863272B1 (de) 2020-11-25
JP6040209B2 (ja) 2016-12-07
HK1209853A1 (en) 2016-04-08
CN104570685B (zh) 2017-07-11

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