EP4016195A1 - Tourbillon für uhrwerk - Google Patents

Tourbillon für uhrwerk Download PDF

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Publication number
EP4016195A1
EP4016195A1 EP21206642.7A EP21206642A EP4016195A1 EP 4016195 A1 EP4016195 A1 EP 4016195A1 EP 21206642 A EP21206642 A EP 21206642A EP 4016195 A1 EP4016195 A1 EP 4016195A1
Authority
EP
European Patent Office
Prior art keywords
escapement
anchor
balance
wheel
tourbillon
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
EP21206642.7A
Other languages
English (en)
French (fr)
Other versions
EP4016195B1 (de
Inventor
Xavier Guillaume
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.)
Manufacture dHorlogerie Audemars Piguet SA
Original Assignee
Manufacture dHorlogerie Audemars Piguet 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 Manufacture dHorlogerie Audemars Piguet SA filed Critical Manufacture dHorlogerie Audemars Piguet SA
Publication of EP4016195A1 publication Critical patent/EP4016195A1/de
Application granted granted Critical
Publication of EP4016195B1 publication Critical patent/EP4016195B1/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
    • 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
    • G04B15/00—Escapements
    • G04B15/14—Component parts or constructional details, e.g. construction of the lever or the escape wheel
    • 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
    • G04B17/04—Oscillators acting by spring tension
    • G04B17/06—Oscillators with hairsprings, e.g. balance
    • G04B17/063—Balance construction
    • 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
    • G04B33/00—Calibers
    • G04B33/06—Calibers of extremely flat shape

Definitions

  • the present invention relates to a tourbillon for a watch movement comprising a cage intended to be rotatably mounted on said watch movement, said cage carrying a regulating member comprising a balance wheel comprising a balance wheel pivot mounted in balance wheel bearings around a balance wheel axis as well as an anchor comprising an anchor pivot pivotally mounted in anchor bearings around an anchor axis and arranged to cooperate, on the one hand, with said regulating member and, on the other hand, with a escapement wheel comprising an escapement pivot pivotally mounted in escapement bearings about an escapement axis.
  • the present invention also relates to a timepiece movement comprising such a tourbillon as well as a timepiece comprising such a movement.
  • Such tourbillons are mechanisms widely used in watches to cause the regulating organ to assume all vertical positions, which allows variations in rate due to the attraction of the earth to mutually compensate each other. This improves the accuracy of the watch.
  • the tourbillon works like a seconds mobile, ie it meshes with the middle wheel via a central pinion fixed under the carriage. Inside the carriage, the oscillating movement of the regulating organ is maintained by the escapement also mounted on the carriage, the escapement pinion meshing with the external peripheral toothing of a fixed seconds wheel placed under the cage and secured to the movement frame.
  • the anchor and escape wheel pivots are located under the balance, so as not to interfere with its oscillating movement.
  • the lever and the escape wheel are pivotally mounted in bearings arranged respectively in the lower bridge of the carriage and in bridges integral with the lower bridge extending under the balance wheel.
  • the standard tourbillon has a certain thickness due to the two levels or floors occupied respectively by the balance wheel and by the lever and the escapement wheel.
  • a watch comprising such a tourbillon must therefore have a sufficient thickness in order to be able to accommodate it, so that the standard tourbillon is hardly compatible with an extra-thin watch.
  • the present invention aims to remedy these drawbacks by proposing a tourbillon having a reduced thickness compared to a standard tourbillon, compatible with use in an extra-thin movement, while retaining the traditional arrangement of the regulating organ in the cage of the tourbillon , without damaging the security of said regulatory body.
  • the invention relates to a tourbillon for a watch movement comprising a cage intended to be rotatably mounted on said watch movement, said cage carrying a regulating member comprising a balance wheel comprising a balance wheel pivot mounted pivotally in balance wheel bearings around a balance shaft as well as an anchor comprising an anchor pivot pivotally mounted in anchor bearings around an anchor shaft and arranged to cooperate, on the one hand, with said regulating member and, on the other part, with an escape wheel comprising a pivot exhaust pivotally mounted in exhaust bearings about an exhaust axis.
  • the lever and the escape wheel are positioned with respect to the balance wheel in such a way that the distance between the anchor axis and the balance wheel axis and the distance between the escapement axis and the balance staff are greater than the outer radius of the balance wheel.
  • the pivots of the lever and of the escape wheel can be positioned so as to come out of the diameter of the balance wheel.
  • the anchor pivot and the escapement pivot are at least partially located at the same level as the balance, in the direction of the thickness of said anchor and escapement pivots, the bearings of anchor and escapement bearings being arranged between two parallel planes defined by the balance bearings.
  • the pivots of the lever and of the escape wheel can be positioned outside the balance wheel, substantially at one and the same level as that of the balance wheel, so that the thickness of the tourbillon can be reduced, without having to modify the arrangement of said pendulum.
  • the present invention also relates to a movement comprising a tourbillon as defined above as well as a timepiece comprising such a movement.
  • This movement and this timepiece according to the invention have the advantage of being able to be ultraflat.
  • the present invention relates to a tourbillon 1 for a watch movement comprising a cage intended to be rotatably mounted around an axis A on a frame element of said watch movement (not shown) and comprising a lower bridge 2 and a bridge upper 4 parallel, interconnected by pillars 6.
  • the cage carries a regulating member comprising a balance wheel 8 and a hairspring 10.
  • the balance wheel 8 comprises a circular rim 8a secured to a balance wheel pivot 12 pivotally mounted around a balance wheel axis A in bearings balance 14, 15, such as shock bearings, carried respectively by the lower 2 and upper 4 bridges.
  • the balance 8 is located inside the cage, the balance axis A corresponding to the axis of rotation of the cage.
  • Edge 8a has a maximum radius, called the outer radius R of balance wheel 8.
  • Hairspring 10 is arranged above balance wheel 8. Hairspring 10 is secured by one end to balance wheel pivot 12 and by its other end to a carrier. eyebolt 16 mounted on the upper deck 4.
  • the cage also carries an anchor 18 and an escape wheel comprising an escape wheel 20 and an escape pinion 22 (cf. fig. 5 ) integral with said escape wheel 20.
  • the anchor 18 comprises an anchor pivot 24 pivotally mounted in anchor bearings 25, 26, such as stones, around an anchor axis B.
  • the anchor 18 is arranged to cooperate, from on the one hand, with said regulating member and, on the other hand, with the escapement wheel 20, via its two pallets 27a, 27b. A detailed description of the anchor 18 will be given below.
  • the escapement wheel 20 comprises an escapement pivot 28 pivotally mounted in escapement bearings 29, 30, such as stones, around an escapement axis C. Said escapement pivot 28 also carries the escape pinion 22.
  • the cage is driven in rotation by the train of the movement via an external peripheral toothing 32 provided around a circular crown forming the lower bridge 2.
  • the cage is intended to be assembled at the frame element of the watch movement via a ball bearing 34, so that the tourbillon illustrated here is of the flying tourbillon type.
  • the ball bearing 34 comprises a hub 36 secured to the cage by means of a pin 38 ensuring rotational resistance between the lower bridge 2 and the hub 36, and an outer ring 40, intended to be secured to a structural element of the watch movement.
  • a ball bearing is known to those skilled in the art and does not require a detailed description.
  • the lever 18 and the escape wheel 20 are positioned with respect to the balance wheel 8 such that the distance d1 between the anchor axis B and the balance wheel axis A (cf. Figure 3 ) and the distance d2 between the escapement axis C and the balance wheel axis A (cf. Figure 5 ) are greater than the outer radius R of the balance 8.
  • anchor pivot 24 and the escapement pivot 28 are at least partially, and preferably entirely, located at the same level as the balance 8, in the direction of the thickness of said pivots.
  • anchor 24 and escapement 28, the anchor bearings 25, 26 and the escapement bearings 29, 30 being arranged between two parallel planes P, P' defined by the bottoms of the balance bearings 14, 15 respectively.
  • the balance pivot 12, the anchor pivot 24 and the escapement pivot 28 are substantially of the same thickness and are located substantially at the same level, in the direction of the thickness of said pivots 12, 24, 28.
  • the tourbillon 1 also comprises an escapement bridge 42 extending outside the balance wheel 8, and integral with the lower bridge 2.
  • the escapement bridge 42 is arranged to carry one of the lever bearings , namely the bearing upper anchor bearing 26, and one of the escapement bearings, namely the upper escapement bearing 30, the other of the anchor bearings, namely the lower anchor bearing 25, and the other of the exhaust bearings, namely the lower exhaust bearing 29, being carried by the circular crown forming the lower bridge 2.
  • the diameter of the circular crown forming the lower bridge 2 is chosen so that the lower bridge extends sufficiently the outside of the balance wheel 8 in order to be able to position the anchor 24 and escapement 28 pivots outside the diameter of said balance wheel 8.
  • the upper anchor and escapement bearings may be mounted on the upper deck, the lower anchor and escapement bearings being mounted either on the deck lower, or on an escapement bridge integral with the upper deck, at the height required for the anchor to cooperate with the regulating member.
  • the escapement bridge 42 preferably has the shape of an arc of a circle coaxial with the axis A, so that the lever 18 and the escapement wheel 20 are positioned so that the distance d1 between the lever axis B and the balance staff A is equal to the distance d2 between the escapement shaft C and the balance staff A.
  • the escapement pinion 22 is positioned around the escapement pivot 28 above the escapement wheel 20, facing the escapement bridge 42, unlike a standard tourbillon construction.
  • a fixed seconds wheel 44 centered on the axis of the balance wheel A or of the tourbillon, integral with an element of the frame of the movement, and arranged to cooperate with the escapement pinion 22.
  • the fixed seconds wheel 44 has a diameter greater than that of the cage, and in particular the diameter of the lower bridge 2, so that the fixed seconds wheel 44 surrounds the tourbillon 1.
  • the fixed seconds wheel 44 has internal peripheral toothing 46 arranged to mesh with the escapement pinion 22.
  • the escapement pinion 22 being positioned substantially at the same level as the balance wheel 8
  • the fixed second wheel 44 is also positioned substantially at the same level as the balance wheel 8, instead of be placed under the cage of a standard tourbillon. This makes it possible to further reduce the size of the assembly.
  • the anchor 18 is devoid of dart to gain thickness, and comprises, on the one hand, an input pallet 27a and an output pallet 27b, intended to cooperate alternately with the escapement wheel 20 and, d on the other hand, a fork intended to cooperate with a pin 48 carried by the balance 8 and comprising first 52 and second 54 horns defining a fork entry.
  • a plate 50 secured to the balance 8 is at least partially located at the same level as the pin 48, in the direction of the thickness of the plate 50 (cf. Figure 3 ).
  • the plate 50 has an anti-rollover wall of generally cylindrical shape in which a notch 56 is provided, in a region adjacent to the pin 48.
  • the anchor 18, the plate 50 and the pin 48 are shaped and dimensioned in such a way that , in a service position, said anti-overturning wall is capable of defining an abutment for the first and second horns 52, 54, said anchor 18, said plate 50 and said pin 48 further being shaped and dimensioned in such a way that, in the service position, each of said horns 52, 54 is capable of penetrating inside the notch 56 exclusively when the pin 48 is at least partially located in the entrance of the fork.
  • Each of the lugs 52, 54 of the fork has an internal wall delimiting the entry of said fork and an external wall shaped and dimensioned in such a way that in a rebate situation, the distance between the point of contact of the pin 48 on the outer wall of the horn 52, 54 concerned and the end of said outer wall closest to the inner wall is greater than the distance between the pin 48 and that of the junctions between the anti-rollover wall and the notch 56 furthest close to the horn 52, 54 concerned.
  • the horns 52, 54 in addition to their conventional function, are intended to ensure safety against overturning.
  • the horns 52, 54 replace the stinger in its anti-rollover function and have a width greater than the typical width of the stinger.
  • the notch 48 must be enlarged with reference to conventional escapements and the plate 50 itself must also be enlarged as a result.
  • the rod 18a connects the entry and exit pallets 27a, 27b to the fork and capable of pivoting between two extreme positions, in the service position, by defining a maximum angle of movement of the anchor 18, the outer wall of each of the horns 52, 54 presenting, from its end closest to the internal wall, a first portion defining a safety surface and presenting an average angle, with reference to the strip 18a, such that said safety surface is substantially tangent to the anti-rollover wall when it is located opposite the latter, then a second portion having an angle of the order of 0 to 45° with reference to the strip 18a, and extending at least to the point of contact of the pin 48 on said outer wall in a rebate situation.
  • the rebate angle of the balance 8 (position represented on the figure 2 ) is superior to a standard configuration, which is favorable for isochrony.
  • the anchor 18 and the escape wheel 20 are intended to be arranged, in the service position, in such a way that the distance between the anchor axis B and the balance axis A is at least equal to twice of the distance between the anchor axis B and the escapement axis C, which defines a new escapement pointing.
  • the operation of the tourbillon according to the invention is similar to that of a standard tourbillon.
  • a new escapement pointing has been defined to allow the anchor pivot and the escapement pivot to be released from the balance wheel. It is thus possible, by positioning the escapement pivots substantially at the same level as the balance pivot, to eliminate the floor or the level usually occupied by the escapement in a standard tourbillon. Thus, the thickness of the tourbillon cage according to the invention is reduced.
  • the solution of the invention makes it possible to reduce the thickness of the cage without sacrificing either the securities between the balance, lever and escapement wheel, or the quality factor of the regulating member. It also makes it possible not to disturb the functioning of the balance, the standard balance pivots and the traditional anti-shock bearings being retained.
  • the removal of the conventional central seconds pinion and the positioning of the fixed seconds wheel at cage height make it possible to further gain in thickness.
  • the invention therefore makes it possible to obtain an extra-flat tourbillon enabling it to be used in an extra-flat movement or to save space in order to optimize watch mechanisms.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Sliding-Contact Bearings (AREA)
  • Bridges Or Land Bridges (AREA)
EP21206642.7A 2020-12-17 2021-11-05 Tourbillon für uhrwerk Active EP4016195B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH01611/20A CH718187A1 (fr) 2020-12-17 2020-12-17 Tourbillon pour mouvement horloger.

Publications (2)

Publication Number Publication Date
EP4016195A1 true EP4016195A1 (de) 2022-06-22
EP4016195B1 EP4016195B1 (de) 2023-07-26

Family

ID=74141215

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21206642.7A Active EP4016195B1 (de) 2020-12-17 2021-11-05 Tourbillon für uhrwerk

Country Status (5)

Country Link
US (1) US20220197219A1 (de)
EP (1) EP4016195B1 (de)
JP (1) JP2022096607A (de)
CN (1) CN114647174B (de)
CH (1) CH718187A1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204576069U (zh) * 2015-02-12 2015-08-19 林英 陀飞轮机构
CH713529A2 (fr) * 2017-03-13 2018-09-14 Seiko Instr Inc Echappement, mouvement d'horlogerie et pièce d'horlogerie.
CH713530A2 (fr) 2017-03-13 2018-09-14 Seiko Instr Inc Echappement, mouvement de pièce d'horlogerie et pièce d'horlogerie.
EP3650954A1 (de) * 2018-11-09 2020-05-13 Montres Breguet S.A. Regulierorgan für armbanduhr
EP3663868A1 (de) * 2018-12-07 2020-06-10 Montres Breguet S.A. Uhrwerk, das ein tourbillon mit einem festen magnetischen rad umfasst

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1867947A (en) * 1930-01-10 1932-07-19 Hasler Ag Escapement wheel for anchor escapements
GB574229A (en) * 1943-11-13 1945-12-28 Thomas Alfred Gummersall A silent lever escapement
CH702707B1 (fr) * 2007-04-05 2011-08-31 Complitime Sa Mouvement de pièce d'horlogerie à tourbillon.
CH701490A1 (fr) * 2009-07-17 2011-01-31 Franck Mueller Watchland S A Tourbillon a roue d'echappement fixe.
EP2309343A1 (de) * 2009-10-07 2011-04-13 Manufacture La Joux-Perret SA Hemmung und mit solch einer Hemmung ausgestatteter Tourbillonmechanismus
EP2315081B1 (de) * 2009-10-26 2012-08-29 Blancpain S.A. Tourbillon und Uhrwerk, das mit einem Tourbillon ausgestattet ist
EP2407832B1 (de) * 2010-07-16 2018-09-05 Richemont International S.A. Uhrwerk einer Uhr
CH707079B1 (fr) * 2012-10-15 2017-01-13 Complitime Sa Pièce d'horlogerie à tourbillon.
CH708960B1 (fr) * 2013-12-02 2017-10-31 Noriah Sa Mécanisme de tourbillon et pièce d'horlogerie comprenant un tel mécanisme.
EP3029530B1 (de) * 2014-12-03 2019-08-14 Nivarox-FAR S.A. Wirbelmechanismus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204576069U (zh) * 2015-02-12 2015-08-19 林英 陀飞轮机构
CH713529A2 (fr) * 2017-03-13 2018-09-14 Seiko Instr Inc Echappement, mouvement d'horlogerie et pièce d'horlogerie.
CH713530A2 (fr) 2017-03-13 2018-09-14 Seiko Instr Inc Echappement, mouvement de pièce d'horlogerie et pièce d'horlogerie.
EP3650954A1 (de) * 2018-11-09 2020-05-13 Montres Breguet S.A. Regulierorgan für armbanduhr
EP3663868A1 (de) * 2018-12-07 2020-06-10 Montres Breguet S.A. Uhrwerk, das ein tourbillon mit einem festen magnetischen rad umfasst

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
C-A. REYMONDIN ET AL.: "Théorie d'horlogerie", FÉDÉRATION DES ECOLES TECHNIQUES, pages: 167

Also Published As

Publication number Publication date
JP2022096607A (ja) 2022-06-29
CH718187A1 (fr) 2022-06-30
EP4016195B1 (de) 2023-07-26
US20220197219A1 (en) 2022-06-23
CN114647174B (zh) 2023-12-26
CN114647174A (zh) 2022-06-21

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