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EP2529278B1 - Automatisches wickelsystem - Google Patents

Automatisches wickelsystem Download PDF

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Publication number
EP2529278B1
EP2529278B1 EP11701103.1A EP11701103A EP2529278B1 EP 2529278 B1 EP2529278 B1 EP 2529278B1 EP 11701103 A EP11701103 A EP 11701103A EP 2529278 B1 EP2529278 B1 EP 2529278B1
Authority
EP
European Patent Office
Prior art keywords
wheel
ratchet
exit
winding system
solar
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
EP11701103.1A
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English (en)
French (fr)
Other versions
EP2529278A1 (de
Inventor
Jean-François Mojon
Xavier Clement
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.)
MPS Micro Precision Systems AG
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MPS Micro Precision Systems AG
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Application filed by MPS Micro Precision Systems AG filed Critical MPS Micro Precision Systems AG
Publication of EP2529278A1 publication Critical patent/EP2529278A1/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
    • G04B5/00—Automatic winding up
    • G04B5/02—Automatic winding up by self-winding caused by the movement of the watch

Definitions

  • the self-winding watches are well known to those skilled in the art and include a gear train kinematically connecting a pinion integral with an oscillating mass, the ratchet of a barrel.
  • This gear train is intended to increase the torque transmitted to the ratchet and straighten the direction of rotation of the gear train, so that the ratchet is driven unidirectionally.
  • the gear ratio that this gear must perform is important because the mainspring is powerful.
  • the reduction ratios generally encountered are of the order of 100 or more.
  • an automatic winding system comprising an oscillating mass thanks to a ball bearing of large diameter.
  • two satellites are pivotally mounted on the central portion of the oscillating mass and respectively drive a first and a second sun gear, alternately depending on the direction of rotation of the oscillating mass.
  • These solar gears are themselves respectively connected cinematically to a first and a second mobile of the automatic gear train, ensuring the reduction.
  • Such a system does not solve the congestion problem related to the reduction gear train.
  • the document CH307687 proposes an interesting automatic winding system, in particular by its configuration and the thickness obtained, without however proposing an optimal reduction ratio.
  • the document DE1254088 describes an automatic winding system using a ring which is toothed internally and externally.
  • the present invention aims to provide an automatic winding system improving the size or reduction ratio of existing systems.
  • the invention relates to an automatic winding system according to two possible alternative embodiments, respectively defined in claims 1 and 3.
  • an oscillating mass 10 is pivotally mounted around an axis AA, by means of a ball bearing 12.
  • this bearing 12 is of unidirectional type (one way), that is to say that is to say that it comprises a first inlet ring 12a, on which is integrally mounted for example by driving or screwing the oscillating mass 10, and a second output ring 12b arranged to be driven by the first input ring 12a only in one direction.
  • Eccentricity e is defined as the distance between the axis AA and the axis of the center of the second output ring 12b.
  • a bearing 14 is driven on the outer face of the second output ring and is thus driven eccentrically with reference to the axis AA.
  • This bearing 14 allows the rotation and the positioning in height of a first wheel 18 of a gearbox 16.
  • the first wheel 18 is of annular shape and is integrally mounted on the bearing 14.
  • the first wheel 18 comprises a toothing of N1 teeth on its outer portion and is thus driven eccentrically about the axis AA.
  • the gearbox 16 further comprises means for guiding the first wheel 18 which is free around the axis AA.
  • These guide means may, for example, consist of pins 20 of circular section, integral with the first wheel 18 and arranged projecting with reference to the surface of the first wheel 18.
  • the pins 20 take place in circular openings 22 fixed , formed in a bridge of the movement, called automatic bridge 24.
  • These circular openings 22 are of diameter greater than that of the pins 20. According to the theory, the diameter of the circular openings is equal to the diameter of the pins plus twice the eccentricity e.
  • the pins 20 on the one hand and the openings 22 in correspondence, on the other hand, are distributed concentrically around the axis AA.
  • the reducer 16 is further composed of a second wheel 26, director, ring-shaped. It is located in the same plane as the first wheel 18.
  • the second wheel 26 is pivotally guided about the axis AA.
  • a flange 24a formed on the automatic bridge 24 with which a shoulder 26a and a bearing 26b of the second wheel 26 cooperate.
  • a holding plate 28 is fixed on the automatic bridge 24 and overflows by above the second wheel 26 to maintain it in height.
  • the inside diameter of the second wheel 26 is greater than the outside diameter of the first wheel 18 so that the first wheel 18 is located inside the second wheel 26.
  • the second wheel 26 is provided with an internal toothing of N2 teeth, with N2 greater than N1 of at least one tooth, arranged to cooperate with the external toothing of the first wheel 18.
  • e m * (N2-N1) / 2, where m is the gear module.
  • the first wheel 18 rolls without slipping on the internal toothing of the second wheel 26. It further comprises an external toothing kinematically connected to the ratchet 30 of a barrel, as will be explained by the after.
  • the first wheel 18 meshes with the second wheel 26, at a point which moves along the internal toothing of the second wheel 26.
  • the latter is so trained.
  • a point on the pitch circle of the first wheel 18 will describe a hypocycloid during the rotation of the first wheel 18.
  • the difference in toothing between the first 18 and second 26 wheels makes it possible to obtain a sharp reduction in the speed of rotation between the input of the gearbox 16 and the output.
  • the winding system according to the invention can be mounted on a module plate, to be adapted to an existing movement or to replace an existing automatic module, with almost no adaptation to the basic movement.
  • the external toothing of the second wheel 26 is connected kinematically with the ratchet 30 of the barrel.
  • it meshes with a return 32 which itself is in connection with an intermediate ratchet wheel 36 in engagement with the ratchet 30.
  • it is still possible to introduce a reduction ratio into the workings between the second wheel 26 and the ratchet.
  • the very strong reduction of the system makes it possible to ensure the irreversibility of the mechanism.
  • it can have a clutch mobile, not shown in the drawing, which would engage with the reference 32. This clutch mobile allows the barrel, via the reference 32, not to empty during the phases of assembly and disassembly of the automatic module.
  • a second embodiment is shown on the figure 4 .
  • the oscillating mass 10 pivoting on the axis AA, the unidirectional bearing 12 and the gear 16 kinematically connecting the second ring 12b of the unidirectional bearing to the ratchet 30 of the barrel.
  • the gearbox 16 comprises a first sun gear 38 provided with teeth N1 teeth and guided in rotation about the axis AA.
  • the reducer 16 further comprises a second sun gear 40, director, provided with a toothing of N2 teeth, with N2> N1, that is to say with at least one tooth of difference.
  • This second sun gear 40 is fixed on the platen of the movement or the automatic module. It is superimposed coaxially with the first sun gear 38. Despite the difference in teeth between the two wheels, they have a pitch circle of identical size, or at least very close, so that their pitch circle is superimposed.
  • the gearbox 16 further comprises a satellite 42 rotatably mounted on the output ring 12b.
  • the satellite is decomposed into a first 42a and a second 42b satellites arranged coaxially.
  • the satellite 42a is in engagement with the second sun wheel 40, which is fixed, while the satellite 42b is in engagement with the first sun wheel 38.
  • the two sun wheels advantageously have different diameters, which allows a bigger difference between the teeth. A greater reduction can be obtained than with the devices of the state of the art using a simple satellite.
  • the gearbox 16 further comprises an output wheel 44 integral with the first sun gear 38 and kinematically connected to the ratchet of the barrel.
  • this second embodiment makes it possible to obtain greater reduction ratios than the first, with equivalent bulk.
  • a clutch mobile as proposed above can also be arranged in engagement with the reference 32, to prevent the barrel to empty during the assembly and disassembly phases of the automatic module.
  • the unidirectional bearing can be replaced by other unidirectional drive systems that would not transmit to the reducer mass movements for a direction of rotation.
  • a snap connection or an asymmetrical profile wheel may also allow such a result.
  • It may further be considered to decenter the oscillating mass 10 with respect to the movement and implement a mass of the micro-rotor type.
  • the automatic winding system according to the invention can, in addition, perfectly be coupled with a display of the power reserve which would connect, for example, on the return or on the intermediate ratchet wheel.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)
  • Winding Of Webs (AREA)

Claims (7)

  1. Automatisches Aufzugssystem, welches umfasst:
    - eine Schwungmasse (10), die um eine Achse (AA) schwenkt,
    - ein unidirektionales Antriebssystem (12), das einen Eingang, an welchem die Schwungmasse (10) fest angebracht ist, und einen Ausgang, der dafür ausgelegt ist, von dem Eingang nur in einer einzigen Richtung angetrieben zu werden, aufweist,
    - ein Untersetzungsgetriebe (16), das den Ausgang des unidirektionalen Antriebssystems mit dem Sperrrad (30) eines Federhauses kinematisch verbindet und ein erstes Rad (18) umfasst, das über den Ausgang exzentrisch um die Achse (AA) angetrieben wird und mit einer Außenverzahnung von N1 Zähnen versehen ist,
    dadurch gekennzeichnet, dass das Untersetzungsgetriebe (16) außerdem umfasst:
    - ein zweites Leitrad (26), das mit einer Innenverzahnung von N2 Zähnen, mit N2>N1, und mit einer Außenverzahnung, die mit dem Sperrrad kinematisch verbunden ist, ausgestattet ist,
    - Führungsmittel, die dafür ausgelegt sind, dass das erste Rad (18) schlupffrei auf der Innenverzahnung des zweiten Rades (26) rollt.
  2. Automatisches Aufzugssystem nach Anspruch 1, dadurch gekennzeichnet, dass die Führungsmittel aus Stiften (20) mit kreisförmigem Querschnitt bestehen, die mit dem ersten Rad (18) fest verbunden sind und bezüglich der Oberfläche des ersten Rades (18) vorstehend angeordnet sind, wobei die Stifte derart angeordnet sind, dass sie in feste kreisförmige Öffnungen (22) hineinragen, die in einer Brücke des Uhrwerks ausgebildet sind, wobei die kreisförmigen Öffnungen (22) einen Durchmesser aufweisen, der größer als derjenige der Stifte (20) ist.
  3. Automatisches Aufzugssystem, welches umfasst:
    - eine Schwungmasse (10), die um eine Achse (AA) schwenkt,
    - ein unidirektionales Antriebssystem (12), das einen Eingang, an welchem die Schwungmasse (10) fest angebracht ist, und einen Ausgang, der dafür ausgelegt ist, von dem Eingang nur in einer einzigen Richtung angetrieben zu werden, aufweist,
    - ein Untersetzungsgetriebe (16), das den Ausgang mit dem Sperrrad (30) eines Federhauses kinematisch verbindet,
    wobei das Untersetzungsgetriebe (16) umfasst:
    - ein erstes Sonnenrad (38), das mit einer Verzahnung von N1 Zähnen versehen und um die Achse (AA) drehbar gelagert ist,
    - ein zweites Leitsonnenrad (40), das mit einer Verzahnung von N2 Zähnen, mit N2>N1, ausgestattet, fest und dem ersten Sonnenrad koaxial überlagert ist,
    - ein Planetenrad (42), das am Ausgang drehbar gelagert ist und mit dem ersten Sonnenrad (38) und dem zweiten Leitsonnenrad (40) gleichzeitig in Eingriff steht,
    ein Ausgangsrad (44), das mit dem ersten Sonnenrad (38) fest verbunden ist und mit dem Sperrrad (30) kinematisch verbunden ist,
    dadurch gekennzeichnet, dass das Planetenrad aus einem ersten (42a) und einem zweiten Planetenrad (42b) zusammengesetzt ist, die koaxial angeordnet sind, wobei das erste Planetenrad (42a) mit dem zweiten Sonnenrad (40) in Eingriff steht, während ein zweites Planetenrad (42b) mit dem ersten Sonnenrad (38) in Eingriff steht, wobei das erste (42a) und das zweite (42b) Planetenrad verschiedene Durchmesser aufweisen.
  4. Aufzugssystem nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Untersetzungsgetriebe mit dem Sperrrad durch ein Vorgelege (32) verbunden ist, welches seinerseits mit einem Zwischensperrrad (36) in Verbindung steht, das mit dem Sperrrad (30) in Eingriff steht.
  5. Aufzugssystem nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass es auf einer Platine eines Moduls angeordnet ist, um mit einem Basisuhrwerk gekoppelt zu werden.
  6. Aufzugssystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das unidirektionale Antriebssystem ein unidirektionales Wälzlager (12) ist, das einen ersten Eingangsring (12a) aufweist, der den Eingang des unidirektionalen Antriebssystems bildet und an dem die Schwungmasse (10) fest angebracht ist, und einen zweiten Ausgangsring (12b), der den Ausgang des unidirektionalen Antriebssystems bildet und dafür ausgelegt ist, von dem ersten Ring nur in einer einzigen Richtung angetrieben zu werden.
  7. Aufzugssystem nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass es ein mit dem Vorgelege (32) in Eingriff stehendes Kupplungsrad aufweist, welches so angeordnet ist, dass es über das Vorgelege (32) ermöglicht, dass sich das Federhaus während der Phasen der Montage und Demontage des automatischen Moduls nicht entleert.
EP11701103.1A 2010-01-26 2011-01-25 Automatisches wickelsystem Active EP2529278B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00094/10A CH702590B1 (fr) 2010-01-26 2010-01-26 Système de remontage automatique.
PCT/EP2011/050956 WO2011092153A1 (fr) 2010-01-26 2011-01-25 Systeme de remontage automatique

Publications (2)

Publication Number Publication Date
EP2529278A1 EP2529278A1 (de) 2012-12-05
EP2529278B1 true EP2529278B1 (de) 2018-08-22

Family

ID=43920954

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11701103.1A Active EP2529278B1 (de) 2010-01-26 2011-01-25 Automatisches wickelsystem

Country Status (3)

Country Link
EP (1) EP2529278B1 (de)
CH (1) CH702590B1 (de)
WO (1) WO2011092153A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2860590B1 (de) 2013-10-10 2016-04-06 Patek Philippe SA Genève Automatische Aufziehvorrichtung für eine Uhr

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH268216A (de) * 1948-08-18 1950-05-15 Ebauches Sa Uhr mit Selbstaufzug durch ein im Zentrum des Werkes schwingendes Aufzugsgewicht.
CH307687A (fr) * 1953-03-19 1955-06-15 Erard Raoul Henri Mécanisme de remontage automatique à masse oscillante pour mouvement de montre.
DE1141953B (de) * 1953-06-23 1962-12-27 Friedrich Mauthe G M B H Selbstaufziehvorrichtung fuer Uhren, insbesondere Armbanduhren
US3104517A (en) * 1962-01-29 1963-09-24 United States Time Corp Planetary gear winding mechanism
CH426651A (fr) * 1964-12-10 1966-05-14 Zenith Montres Montre à remontage automatique
CH1488368A4 (de) * 1968-10-07 1972-10-13
CH552843A (de) * 1971-07-22 1974-08-15
SU1118956A1 (ru) * 1982-02-01 1984-10-15 Пензенский Политехнический Институт Механизм подзавода наручных часов
EP1046965B1 (de) 1999-04-23 2004-08-18 Rolex Sa Uhrwerk mit Schwungmassen-Selbstaufzug
CH699325A2 (fr) * 2008-08-14 2010-02-15 Temps Fab Du Mouvement pour piece d'horlogerie a dispositif de remontage automatique embarque.

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
WO2011092153A1 (fr) 2011-08-04
CH702590B1 (fr) 2015-03-13
CH702590A1 (fr) 2011-07-29
EP2529278A1 (de) 2012-12-05

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