EP3176652B1 - Uhrwerk für uhr, und uhr, die ein solches uhrwerk umfasst - Google Patents

Uhrwerk für uhr, und uhr, die ein solches uhrwerk umfasst Download PDF

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Publication number
EP3176652B1
EP3176652B1 EP15197841.8A EP15197841A EP3176652B1 EP 3176652 B1 EP3176652 B1 EP 3176652B1 EP 15197841 A EP15197841 A EP 15197841A EP 3176652 B1 EP3176652 B1 EP 3176652B1
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EP
European Patent Office
Prior art keywords
regulating system
wheel
movement according
clockwork movement
frequency
Prior art date
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EP15197841.8A
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English (en)
French (fr)
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EP3176652A1 (de
Inventor
Arnaud Faivre
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.)
Tec Ebauches SA
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Tec Ebauches SA
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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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/20—Compensation of mechanisms for stabilising frequency
    • G04B17/28—Compensation of mechanisms for stabilising frequency for the effect of imbalance of the weights, e.g. tourbillon
    • G04B17/285—Tourbillons or carrousels
    • 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
    • G04B1/22—Compensation of changes in the motive power of the mainspring
    • G04B1/225—Compensation of changes in the motive power of the mainspring with the aid of an interposed power-accumulator (secondary spring) which is always tensioned

Definitions

  • the present invention relates to a clockwork movement comprising a power source supplying components forming two distinct kinematic chains, each kinematic chain comprising a regulating system, the frequency of rotation of said control systems being different from each other.
  • It also relates to a timepiece in which such a movement is mounted.
  • the control systems of watch movements comprising several vortices can be kinematically related to each other or not.
  • resonance vortex systems comprising three identical vortices.
  • These eddies have by construction, a rotation frequency close to one another.
  • the frequency of rotation of each of them adapts to the frequency of other vortices by a phenomenon of resonance.
  • the rotation frequency of each of the vortices tends towards the average of the rotation frequency, without the vortices being linked "mechanically" between them.
  • the correction of the isochronism can be more or less effective.
  • the range of movements (speed, acceleration, amplitude) at which a regulating system is sensitive is limited according to the frequency of rotation of this regulating system.
  • the efficiency of the control systems of current watches is not necessarily optimal, depending on the movements of the wearer of the watch.
  • the document CH 700 459 describes a timepiece comprising two resonators.
  • This timepiece comprises a first wheel resulting in a first resonator and a second wheel driving a second resonator.
  • these two resonators can move at different frequencies from each other.
  • the first and second wheels are driven by a single source of energy.
  • each of the resonators acts on a different set of indicators.
  • One of the resonators concerns only the chronograph.
  • the other resonator relates only to the time display.
  • CH 700 459 The purpose of the invention described in CH 700 459 is to separate the resonators according to the function they perform.
  • the patent application CH 708 373 relates to a clockwork movement comprising two energy sources, each energy source forming part of a kinematic chain terminating in a regulating member. These two kinematic chains are interconnected by a coupling means.
  • the regulating members Due to the presence of the coupling means, the regulating members have a similar frequency and interact with each other so as to synchronize their frequency.
  • the present invention proposes to overcome the drawbacks of the systems of the prior art by proposing a clockwork movement allowing a good maintenance of the isochronism of the balance and therefore a good accuracy of the watch.
  • the movement according to the invention is also able to take into account a wide range of movements, speeds or accelerations of the watch. Therefore, the corrections offered by the control systems apply to a wide range of movements of the wearer of the watch.
  • the movement of the invention proposes to operate with a single barrel while providing a power reserve compatible with use in real life. This makes it possible to integrate the movement into a housing "conventional" dimensions.
  • the movement according to the invention is furthermore designed so as to allow easy adjustment.
  • each kinematic chain comprises a torque stabilizer disposed between the power source and the regulating system.
  • the object of the invention is also achieved by a timepiece comprising the movement described above.
  • control systems are provided. These control systems are kinematically related to each other. However, unlike known movements, each regulating system has a different speed or a different frequency of rotation. In this way, the ranges of motion to which each of the control systems is sensitive are different. Thus, the corrections of the isochronism apply on a large range of movements of the wearer of the watch.
  • one of the control systems has a rotation frequency greater than the conventional rotation frequency of this kind of control systems, which is one turn per minute.
  • a higher rotation frequency ensures that the exhaust takes different positions after a short time. This ensures a better stability of the isochronism and thus a better precision.
  • the relative position of the escapements of the control systems also changes rapidly, unlike the movements of the prior art in which the movements of the escapements are synchronous.
  • a high rotational speed requires the input of a large amount of energy. For this reason, there are very few control systems with rotational frequencies greater than one revolution per minute.
  • the vortices having the highest rotation frequency have a rotation frequency of three revolutions per minute. No The regulating system has a rotation frequency close to, equal to or greater than 10 revolutions per minute, as in the case of the present invention.
  • the present invention proposes to make a movement for a timepiece comprising two control systems, one of which rotates at a frequency much higher than the other and greater than one revolution per minute.
  • This movement has a power reserve compatible with a concrete practical realization while keeping a conventional volume. Movement can be adjusted to ensure proper long-term operation under real-life conditions. The result is an increased accuracy compared to the mechanical movements comprising one or more control systems, this movement being able to take into account a wide range of movements of the wearer of the watch.
  • the invention relates to a movement for a timepiece comprising essentially a power source 11, a center mobile 12 and two control systems 13, 14.
  • the movement may comprise other Mobile, particularly a mobile hours with an hour hand 16 and a mobile minute 17 with a minute hand 18.
  • the energy source takes the form of a conventional barrel 19. This barrel, or more generally this source of energy 11 engraine with the center mobile 12, this center mobile being part of two kinematic chains 20, 21 different. Each of these kinematic chains results in one of the control systems 13, 14, represented in the form of a vortex.
  • first kinematic chain 20 One of the kinematic chains, here called first kinematic chain 20, is illustrated by the Figures 2 and 3 .
  • the regulating system 13 of the first kinematic chain is of the tourbillon type and comprises an escapement 22 with a Swiss anchor, this escapement being formed of an escape wheel 23 and an escape gear 24
  • This regulating system 13 further comprises an anchor 25 and a sprung balance 26 cooperating with the anchor 25 so as to adjust its displacement.
  • the anchor and the exhaust are mounted on a pivoting cage 27 integral and coaxial with a mobile which can be a wheel of seconds.
  • the exhaust 22 performs a complete rotation in one minute.
  • the first driveline 20 further comprises a first torque stabilizer 28.
  • a torque stabilizer is illustrated in detail by the Figures 6 and 7 .
  • This torque stabilizer is formed of a wheel 29 and a pinion 30. These two elements are capable of pivoting about the same axis 31, the wheel being mounted idly on this axis.
  • the pinion 30 is integral with an inner disk 32 and engrains with the center mobile 12.
  • the inner disk 32 further comprises two pivots 33 whose function is explained below.
  • the inner disk 32 is integral with a spiral spring 34 in charge of transmitting the torque of the pinion 30 to the wheel 29.
  • This spiral spring 34 can be fixed by one of its ends to the inner disk 32, for example by means of one of the pivots 33.
  • the spiral spring 34 is furthermore fixed to the wheel 29 so that the wheel and the inner disk 32 are kinematically connected to one another by means of the spiral spring 34.
  • the wheel 29 of the first torque stabilizer 28 has a transverse arm 35 disposed substantially along a diameter of this wheel.
  • the pivots 33 of the torque stabilizer are arranged such that they exceed the cross arm 35 in height. In this way, the pivots 33 act as a limiting member of the stroke of the inner disk 32 relative to the wheel 29.
  • This stroke limiting function makes it possible to prevent the breaking of parts, in particular of the spiral spring. 34, in the case of a race too important.
  • the pin limitation function 33 is also useful to prevent the spiral 34 from winding or unrolling completely, its turns are in contact with each other and so it has more elastic properties.
  • the pivots 33 also facilitate the adjustment of the angular displacement of the inner disk 32.
  • the pivots should undergo angular displacement as large as possible, without however resisting against the transverse arm.
  • the adjustment of the movement of the inner disk 32 relative to the wheel 29 can be done initially by selecting a spiral spring 34 adapted. In a second time, this adjustment can be done by means of a movable peg holder if such a peg carrier is provided, or by moving a ferrule in which is fixed the spiral spring 34.
  • the barrel 19 produces a torque that it transmits to the center mobile 12. This latter transfers a portion of the torque to the first torque stabilizer 28 via the pinion 30 of this torque stabilizer.
  • the torque stabilizer wheel 29 engages with a center pinion 15 of the first regulating system 13.
  • the first regulating system causes the anchor-exhaust assembly to rotate at a rotation frequency of one revolution per minute through the movable seconds and exhaust pinion 24.
  • the exhaust pinion 24 does not engage rigidly with the center wheel 12.
  • the first torque stabilizer 28 is disposed between the center wheel 12 and the regulating system 13 of the wheel. to produce an elastic connection.
  • the frequency of rotation of the first regulating system it is advantageously the same as for a conventional clockwork movement, namely of the order of one revolution per minute. The gear ratios are therefore calculated accordingly.
  • the second kinematic chain 21 is illustrated in detail by the Figures 4 and 5 .
  • This second kinematic chain comprises the center mobile 12 which is also contained in the first kinematic chain 20, a torque stabilizer 36, two intermediate mobiles 37, 38 and the second regulating system 14.
  • the second torque stabilizer 36 is similar to the first torque stabilizer 28.
  • it is formed of a pinion 39 and a wheel 40, these two elements being coaxial, but not rigidly fixed to each other so as to be pivotable relative to each other on a common axis 41.
  • the pinion 39 and the wheel 40 of the second torque stabilizer are connected by a spiral spring 42 in charge of transmitting a torque of the pinion 39 to the wheel 40 of this stabilizer.
  • the wheel 40 of the second torque stabilizer 36 engrains with a wheel 43 of the first intermediate wheel 37.
  • the wheel 43 of the first intermediate wheel engages with a pinion 45 of the second intermediate wheel 38 formed of the pinion 45 and a wheel 46.
  • the wheel of this second intermediate mobile engraine with a pinion 47 of the second regulating system 14.
  • the second torque stabilizer 36 is illustrated in the figures 1 and 4 in a position between the center mobile 12 and the first intermediate mobile 37. This torque stabilizer could be placed in other places of the second kinematic chain, in particular between the two intermediate mobiles or between the second intermediate mobile and the second regulating system.
  • the presence of two intermediate wheels results in a gear ratio different from that of the first kinematic chain.
  • the second regulating system is different from the first regulating system in that its rotation frequency is significantly higher.
  • the second regulating system 14 is formed in particular of the pinion 47, a wheel 48 and a 49 escapement with Swiss anchor.
  • the wheel 48 engrains with a pinion 50 of the escape wheel, named exhaust pinion.
  • the exhaust pinion 50 is larger than the corresponding exhaust pinion 24 of the first regulating system 13.
  • the wheel 48 of the second regulating system 14, called the fixed second wheel 48 is smaller than the fixed second wheel. 48 'corresponding to the first regulating system 13.
  • the respective dimensions of the wheel of the second vortex and the exhaust pinion and the dimensions of the first and second intermediate mobiles are such that the frequency of rotation of the exhaust 49 of the second regulating system is significantly higher than the rotation frequency of the exhaust 22 of the first regulating system.
  • the term "significantly higher" means that, unlike other watch movements comprising more than one vortex, the frequencies are sufficiently different to avoid that they agree by a phenomenon of resonance. This difference in frequency should be at least 20%.
  • the rotation frequency of the second regulating system 14 is at least equal to twice the frequency of the first regulating system 13.
  • the rotation frequency of the second regulating system is ten turns per minute for the second system setting 14 against one revolution per minute for the first regulating system 13.
  • Such a rotation frequency of the escapement 49 generates a number of constraints.
  • the moving mass must be as small as possible to minimize energy consumption.
  • materials having a relatively low density are advantageously used for the manufacture of the control system.
  • the parts must withstand mechanical constraints totally unconventional for this kind of parts.
  • the materials used must fulfill these constraints. These materials may in particular comprise titanium or a titanium alloy.
  • the barrel 19 can also be optimized, in particular at the level of the spring used.
  • control systems made in the form of vortices. At least one of these could be replaced by other control systems such as a carousel.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Springs (AREA)
  • Micromachines (AREA)

Claims (14)

  1. Uhrwerk umfassend eine Energiequelle (11), die Energie für Komponenten liefert, die zwei unterschiedliche kinematische Ketten bilden (20, 21), wobei jede kinematische Kette eine Regelungssystem (13, 14) umfasst, wobei die Rotationsfrequenzen der besagten Regelungssysteme voneinander verschieden sind, dadurch gekennzeichnet, dass jede kinematische Kette einen Drehmomentstabilisator (28, 36) enthält, der zwischen der Energiequelle (11) und dem Regelungssystem (13, 14) angeordnet ist.
  2. Uhrwerk nach Anspruch 1, dadurch gekennzeichnet, dass die Rotationsfrequenz eines der Regelungssysteme (14) mindestens 20% höher als die Rotationsfrequenz des anderen Regelungssystems (13) ist.
  3. Uhrwerk nach Anspruch 1, dadurch gekennzeichnet, dass die Rotationsfrequenz eines der Regelungssysteme (14) mindestens gleich der doppelten Rotationsfrequenz des anderen Regelungssystems (13) ist.
  4. Uhrwerk nach Anspruch 1, dadurch gekennzeichnet, dass die Rotationsfrequenz eines der Regelungssysteme (14) mindestens gleich dem Zehnfachen der Rotationsfrequenz des anderen Regelungssystems (13) ist.
  5. Uhrwerk nach einem beliebigen der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Regelungssystem (13) mit der niedrigsten Rotationsfrequenz eine Rotationsfrequenz von einer Umdrehung pro Minute hat.
  6. Uhrwerk nach Anspruch 1, dadurch gekennzeichnet, dass der Drehmomentstabilisator (28, 36) ein Rad (29, 40), eine Innenscheibe (32), die mit einem Ritzel (30, 39) einstückig ist, umfasst, wobei das Rad (29, 40) und die Innenscheibe (32) auf einer gemeinsamen Rotationsachse (31, 41) montiert sind, wobei das Rad (29, 40) drehbar auf dieser Achse angeordnet ist, wobei das Ritzel (30, 39) mit der Achse (31, 41) einstückig ist, und dadurch, dass das Rad und das Ritzel, durch eine Spiralfeder (34, 42) miteinander verbunden sind.
  7. Uhrwerk nach Anspruch 6, dadurch gekennzeichnet, dass der Drehmomentstabilisator (28, 36) mindestens ein Begrenzungselement, das den Hub des Rades (29, 40) in Bezug auf die Innenscheibe (32) begrenzt, enthält.
  8. Uhrwerk nach Anspruch 7, dadurch gekennzeichnet, dass das Hubbegrenzungselement mindestens einen Zapfen (33), der mit der Innenscheibe (32) einstückig ist, enthält, und einen Querarm (35), der ein einstückiger Bestandteil des Rades (29, 40) des Drehmomentstabilisators ist.
  9. Uhrwerk nach Anspruch 1, dadurch gekennzeichnet, dass die zweite kinematische Kette (21) mindestens ein zwischen der Energiequelle (11) und dem Regelungssystem (14) angeordnetes intermediäres Bewegungselement (37, 38) enthält.
  10. Uhrwerk nach Anspruch 9, dadurch gekennzeichnet, dass die zweite kinematische Kette (21) mindestens zwei zwischen der Energiequelle (11) und dem Regelungssystem (14) angeordnete intermediäre Bewegungselemente (37, 38) enthält, wobei eines der intermediären Bewegungselemente (37) mit dem Drehmomentstabilisator (36) in Kontakt ist, und ein anderes intermediäres Bewegungselement (38) mit dem Regelungssystem (14) in Kontakt steht.
  11. Uhrwerk nach Anspruch 1, dadurch gekennzeichnet, dass jedes der Regelungssysteme (13, 14) ein mit einem Ritzel (24, 50) versehene Hemmung (22, 49) und ein mit dem Hemmungsritzel in Verbindung stehendes zweites Festrad (48, 48 ') enthält, und dadurch, dass das Hemmungsritzel (24) des ersten Regelungssystem (13) eine andere Größe als das Hemmungsritzel (50) des zweiten Regelungssystem (14) hat.
  12. Uhrwerk nach Anspruch 1, dadurch gekennzeichnet, dass das Regelungssystem (13, 14) einen Tourbillon enthält.
  13. Uhrwerk nach Anspruch 1, dadurch gekennzeichnet, dass das Regelungssystem ein Karussell enthält.
  14. Zeitmessgerät, das ein Uhrwerk gemäß einem beliebigen der Ansprüche 1 bis 13 enthält.
EP15197841.8A 2015-12-03 2015-12-03 Uhrwerk für uhr, und uhr, die ein solches uhrwerk umfasst Active EP3176652B1 (de)

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EP3176652A1 EP3176652A1 (de) 2017-06-07
EP3176652B1 true EP3176652B1 (de) 2019-11-06

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Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE517373T1 (de) * 2009-02-24 2011-08-15 Montres Breguet Sa Uhr bestehend aus einem chronographen und einem uhrwerk
CH708373B1 (fr) * 2013-07-26 2017-12-15 Red & White Intellectual Property Man Sa Mouvement d'horlogerie comprenant deux trains d'engrenages reliés cinématiquement entre eux.

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