EP3158402B1 - Drehteil einer uhr - Google Patents

Drehteil einer uhr Download PDF

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Publication number
EP3158402B1
EP3158402B1 EP15727642.9A EP15727642A EP3158402B1 EP 3158402 B1 EP3158402 B1 EP 3158402B1 EP 15727642 A EP15727642 A EP 15727642A EP 3158402 B1 EP3158402 B1 EP 3158402B1
Authority
EP
European Patent Office
Prior art keywords
plate
arbor
pivot axis
mobile component
arm
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
EP15727642.9A
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English (en)
French (fr)
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EP3158402A1 (de
Inventor
Olivier Mertenat
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.)
ETA SA Manufacture Horlogere Suisse
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ETA SA Manufacture Horlogere Suisse
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Publication of EP3158402A1 publication Critical patent/EP3158402A1/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
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G04B13/021—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft
    • G04B13/023—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft allowing rotational slipping when a threshold torque is exceeded
    • 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
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G04B13/021—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft
    • 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
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G04B13/025—Wheels; Pinions; Spindles; Pivots with elastic means between the toothing and the hub of a toothed wheel

Definitions

  • the invention relates to a watch mobile phone in several parts, wherein said mobile comprises a first component consisting of a shaft which comprises, around a first axis of pivoting, a housing arranged for receiving a second component consisting of a board in a single axial position.
  • the invention further relates to a watch movement comprising at least one such mobile.
  • the invention relates to the field of watch mechanisms, and more particularly the wheels.
  • Many mechanical watch movements comprise at least one friction mobile, in particular to allow adjustments when the watch operates.
  • a mechanical movement equipped with a medium wheel, usually has a friction at the level of the clockwork. Friction makes it possible to turn the road, independently of the finishing gear, during the time setting. Friction also allows rotation of the drive wheel plate when the watch is running.
  • the document FR 1222456 in the name of EBAUCHESFABRIK ETA AG describes a mobile with a board comprising three elastic arms, substantially radial, arranged to frictionally tighten a smooth shaft. More particularly, the ends of these arms have a hollow profile corresponding to the radius of the shaft.
  • the document JP S59 135385 in the name of SEIKO describes a plastic wheel fixed elastically on a metal gear.
  • the document JP S50 91562 in the name of SEIKO describes a wheel with a board with spokes elastically fixed on a tree.
  • the invention relates to a multi-part watchmaker according to claim 1. Preferred embodiments are defined in the dependent claims.
  • the invention also relates to a watch movement comprising at least one such mobile, characterized in that the composition of said mobile is restricted to said shaft and said board assembled one on the other.
  • the invention relates to a multi-part watch mobile 100.
  • this mobile has friction means, and is called “friction mobile”.
  • the mobile 100 comprises a first component constituted by a shaft 1.
  • This shaft 1 comprises, around a first pivot axis D1, a housing 6 arranged for receiving a second component.
  • This second component consists of a board 2 in a single axial position.
  • the board 2 has a peripheral surface 20 with reference to a second pivot axis D2.
  • the shaft 1 comprises, on either side of the at least one housing 6, in the direction of the first axis of pivoting D1, an axial abutment bearing surface 7 which is arranged to maintain abutment abutment board 2 on the tree 1.
  • This board 2 comprises at least one first elastic arm 4 radially relative to the second pivot axis D2, and a second arm 5 rigid or elastically radially relative to the second pivot axis D2.
  • first elastic arms 4 and second arms 5 together form a clamp 3, which is arranged to clamp a radial bearing surface 9 that includes the shaft 1 in the vicinity of the axial abutment bearing surface 7. The friction is thus assured between the board 2 and the tree 1.
  • the elasticity of the arms 4, 5, of the board 2 is used to allow proper positioning, and preferably a snap in position.
  • the shaft 1 comprises an introduction ramp 8, which is arranged to radially push each first elastic arm 4, and each second elastic arm 5 when the board 2 comprises, to allow the introduction of the board 2 on the tree 1.
  • the board 2 comprises a first elastic arm 4 and a second elastic arm 5, symmetrical to each other with respect to the second pivot axis D2.
  • the clamp 3 is circumscribed to a cylinder whose radius is smaller than that of a cylinder circumscribed to the radial bearing surface 9.
  • the central part of the board 2 comprises as many curved surfaces, in particular substantially cylindrical surfaces, as of arms 4, 5.
  • arms 4, 5 In the variants illustrated by the figures, which comprise a first elastic arm 4, and a second arm 5, the center of the board is defined by two curved surfaces, which come to pinch the tree 1.
  • the figure 7 illustrates a realization of the type "two points" which is not part of the invention and where the board 2 carries on the shaft 1 in two symmetrical points P1 and P2 with respect to the axis D1.
  • Each first arm 4 or second arm 5 thus has such a curved surface, constituted by a substantially cylindrical sector, in particular of elliptical hollow section 34, 35, whose axis C is eccentric with respect to the second pivot axis D2.
  • the axis C is then further away from the substantially hollow cylindrical sector 34, 35, than the second pivot axis D2, by a value eccentricity E, visible on the figure 9 , which is between 0.1 and 0.2 times the radius of the substantially hollow cylindrical sector 34, 35, considered.
  • the value of the friction is advantageously defined by a precise interval, from 0.060 to 0.080 N.cm, in order to fulfill the criteria of quality to the impact behavior, and of setting the time. It can be understood that the friction can be achieved either at surfaces of a certain magnitude, such as the substantially cylindrical sectors 34, 35, or at point areas, for example in the form of a two-point friction or four points.
  • FIG. 10 A realization of the "four points" type according to the invention is visible in figure 10 :
  • the board 2 is on the shaft 1 at four points P11, P12, P13, P14, symmetrical two by two with respect to the axis D1.
  • the inside board radius Rp is then less than the road radius Rch at the level of the shaft 1.
  • the four points are called P21, P22, P23, P24 for the variant of the figure 11 .
  • the board 2 comprises first drive means 21 at the first elastic arm 4, and second drive means 22 at said second elastic arm 5 when the board 2 comprises.
  • first 21 and second 22 drive means comprise raised profiled sector relief and / or reentrant, which are arranged to cooperate with complementary profile tooling for the opening of the clamp 3 during the introduction of the board 2 on the tree 1.
  • first 21 and second 22 drive means are symmetrical with respect to the second pivot axis D2.
  • the board 2 may further comprise, in the vicinity of its periphery and in its inner part, third 23 and fourth 24 drive means.
  • the board 2 comprises holding means, such as posts or bores, or the like, in its most rigid part, which are arranged to cooperate with a traction tool.
  • the board 2 has on its lower face 21 and / or upper 22, a surface roughness greater than 6.3 micrometers Ra, for its cooperation in friction with a holding tool and / or traction.
  • the peripheral surface 20 is a toothing oriented on the second pivot axis D2.
  • the peripheral surface 20 is a cam in reference to the second pivot axis D2 and to an angular reference constituted by the first arm 4 or by the second arm 5.
  • the radial bearing surface 9 and the introduction ramp 8 of the shaft 1 together define a bead 10, which is arranged to immobilize the board 2 on the shaft 1 when the board is in bearing abutment on the axial abutment bearing surface 7 of the shaft 1.
  • the radial bearing surface 9 is flush with respect to the bead 10. This draft angle makes it possible to maintain the board 2 constant height, and constant radius of friction.
  • the illustrated achievement Figures 11 to 13 is a realization of the invention particularly advantageous: it is a realization at four points of contact, P21, P22, P23, P24, which are arranged angularly substantially at 90 ° from each other.
  • the junction profile between the board and the tree, as visible on the figure 13 is different from that of the figure 6 .
  • the radial bearing surface 9 of the shaft 1 is under the bead, a low angle "b" of between 2 ° and 8 °, preferably close to 5 °.
  • the lower surface of the board 2 constitutes the abutment abutment surface 7, and bears on a radial surface 11 of the shaft orthogonal to the axis D1 thereof, on an annular surface delimited by a circle. PB interior, and a PC outer circle.
  • the board Because of the elasticity of the board, and the draft, the board is held firmly in this support, it comes into contact on a surface substantially reduced to a circle, PA, at the taper of the taper 9 of the 1.
  • the projection of the circle PA, parallel to the axis D1 of the shaft 1, on the radial bearing surface 11, is located between the inner circle PB and the outer circle PC, and may, as illustrated on FIG. figure 13 , coincide with the inner circle PB.
  • a large volume CH lube chamber is advantageously arranged in recess of the undercut cone 9, at a much more pronounced draft angle, for example from 30 ° to 45 °, so that to maximize the volume of this chamber CH, bounded on the opposite side by the radial surface 11, the bottom (in the vicinity of the axis D1) of this chamber CH being determined by the resistance calculation of the materials of the shaft 1 according to the service constraints of mobile 100.
  • This puncture makes the chamber CH a lubricating reservoir remaining sealed vis-à-vis the toothing 20.
  • the board 2 is made of CuBe2, of thickness close to 0.12 mm, with a toothing 20 of pitch diameter close to 4.5 mm, for receiving a shaft 1 of a nearby diameter.
  • 1.33 mm at the bearing circle PA, and its elastic arms 4 and 5 have, according to the plane of the board, a section of 0.3 mm, with a larger gap in the free state not mounted on the shaft of approximately 1.28 mm, with a diametral clamping between 0.04 and 0.05 mm on the shaft.
  • the hollow sectors 34, 35, of substantially elliptical section, between P21 and P22 on the one hand, and between P23 and P24 on the other hand, designed to grip the shaft 1, have, in the free state, each an eccentricity of about 0.2 mm.
  • the toothing 20 is, in a vacuum, of elliptical contour to take into account the deformation of the board 2, with a homothetic eccentration to that of the bearing surfaces P21-P22 and P23-P24.
  • This toothing 20 is symmetrical with respect to a plane of symmetry passing through the axis.
  • This arrangement makes it possible to weakly apply the elasticity of the board 2 during the assembly by pinching on the shaft 1, and the deformation remains confined to the elastic domain, which makes it possible to prevent the formation of burrs.
  • the value of the friction is tainted only by a very small dispersion.
  • the invention also relates to a watch movement 200 comprising at least one such mobile 100.
  • the composition of this mobile 100 is restricted to the shaft 1 and the board 2 assembled on one another.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Gears, Cams (AREA)
  • Sliding-Contact Bearings (AREA)
  • Micromachines (AREA)

Claims (12)

  1. Uhrendrehteil (100) aus mehreren Teilen, wobei das Drehteil (100) eine erste Komponente umfasst, die durch eine Welle (1) gebildet ist, die um eine erste Drehachse (D1) eine Aufnahme (6) aufweist, die dafür ausgelegt ist, eine zweite Komponente, die durch eine Platte (2) gebildet ist, an einer eindeutigen axialen Position aufzunehmen, wobei die Platte (2) eine Umfangsoberfläche (20) mit Bezug auf eine zweite Drehachse (D2) aufweist, wobei die Welle (1) auf beiden Seiten der mindestens einen Aufnahme (6) in Richtung der ersten Drehachse (D1) eine Axialanschlag-Auflagefläche (7) aufweist, die dafür ausgelegt ist, die Platte (2) an der Welle (1) anschlagend abgestützt zu halten, wobei die Platte (2) einen in Bezug auf die zweite Drehachse (D2) radial nachgiebigen ersten Arm (4) und einen starren oder in Bezug auf die zweite Drehachse (D2) radial nachgiebigen zweiten Arm (5) aufweist, wobei der erste nachgiebige Arm (4) und der zweite Arm (5) zusammen eine Klemme (3) bilden, die dafür ausgelegt ist, eine radiale Auflagefläche (9), die die Welle (1) in der Nähe der Axialanschlag-Auflagefläche (7) aufweist, festzuklemmen, wobei die Welle (1) eine Einführschräge (8) aufweist, die dafür ausgelegt ist, den ersten nachgiebigen Arm (4) und den zweiten nachgiebigen Arm (5), falls die Welle einen solchen aufweist, radial zurückzuschieben, um das Aufschieben der Platte (2) auf die Welle (1) zu ermöglichen, wobei der erste Arm (4) und der zweite Arm (5) einen im Wesentlichen hohlzylindrischen Abschnitt (34; 35) mit einer zu der zweiten Drehachse (D2) exzentrischen Achse (C) aufweisen, dadurch gekennzeichnet, dass die Achse (C) von dem im Wesentlichen hohlzylindrischen Abschnitt (34; 35) um einen Exzentrizitätswert (E), der im Bereich des 0,1- bis 0,2-fachen Radius des im Wesentlichen hohlzylindrischen Abschnitts (34; 35) liegt, weiter entfernt ist als die zweite Drehachse (D2), dass die radiale Auflagefläche (9) und die Einführschräge (8) der Welle (1) gemeinsam einen Wulst (10) definieren, der dafür ausgelegt ist, die Platte (2) an der Welle (1) festzusetzen, wenn sich die Platte an der Axialanschlag-Auflagefläche (7) der Welle (1) anschlagend abstützt, dass die radiale Auflagefläche (9) in Bezug auf den Wulst (10) verjüngt ist mit einem kleinen Winkel (b) im Bereich von 2° bis 8° und dass die Platte (2) an der Welle (1) an nur vier Punkten (P11, P12, P13, P14; P21, P22, P23, P24), die in Bezug auf die erste Drehachse (D1) paarweise symmetrisch sind, getragen wird, dass die Platte (2) eine innere Oberfläche aufweist, die eine Axialanschlag-Auflagefläche (7) bildet, die sich an einer radialen Oberfläche (11) der Welle (1) senkrecht zu der Achse (D1) der Welle (1) auf einer ringförmigen Oberfläche, die durch einen inneren Kreis (PB) und einen äußeren Kreis (PC) begrenzt ist, abstützt, wobei die Platte (2) an der Position, an der sie mit der Welle (1) zusammengefügt ist, mit der Welle (1) auf einer Oberfläche, die im Wesentlichen auf einen Kreis (PA) reduziert ist, auf Höhe der radialen Auflagefläche (9) in Kontakt steht, wobei sich ein Vorsprung des Kreises (PA) parallel zu der Achse (D1) der Welle (1) auf der radialen Auflagefläche (11) zwischen dem inneren Kreis (PB) und dem äußeren Kreis (PC) befindet und mit dem inneren Kreis (PB) zusammenfällt.
  2. Drehteil (100) nach Anspruch 1, dadurch gekennzeichnet, dass die Platte (2) zwei in Bezug auf die erste Drehachse (D1) symmetrische Oberflächen aufweist, die einen inneren Plattenradius (Rp) besitzen, der kleiner als ein Rohrradius (Rch) ist, den zwei in Bezug auf die erste Drehachse (D1) symmetrische Bereiche der Welle (1), die sich gegenüber den beiden Oberflächen der Platte (2) befinden, aufweisen.
  3. Drehteil (100) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Klemme (3) im freien Zustand in einen Zylinder einbeschrieben ist, dessen Radius kleiner als jener eines Zylinders ist, der in die radiale Auflagefläche (9) einbeschrieben ist.
  4. Drehteil (100) nach einem der Ansprüche 1 bis 3 dadurch gekennzeichnet, dass die Platte (2) auf Höhe des ersten nachgiebigen Arms (4) erste Antriebsmittel (21) und auf Höhe jedes zweiten nachgiebigen Arms (5), sofern die Platte (2) solche enthält, zweite Antriebsmittel (22) umfasst und dass die ersten (21) und zweiten (22) Antriebsmittel Abschnitte mit vorstehendem und/oder zurückspringendem Reliefprofil aufweisen, die dafür ausgelegt sind, mit einem Werkzeug mit komplementärem Profil zusammenzuwirken, um die Klemme (3) beim Aufschieben der Platte (2) auf die Welle (1) zu öffnen.
  5. Drehteil (100) nach Anspruch 4, dadurch gekennzeichnet, dass die ersten (21) und zweiten (22) Antriebsmittel in Bezug auf die zweite Drehachse (D2) symmetrisch sind.
  6. Drehteil (100) nach Anspruch 5, dadurch gekennzeichnet, dass die Platte (2) in ihrem starreren Teil Haltemittel für die Zusammenwirkung mit einem Zugwerkzeug aufweist.
  7. Drehteil 100) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Platte (2) in der Nähe ihres Umfangs und in ihrem inneren Teil dritte (23) und vierte (24) Antriebsmittel aufweist.
  8. Drehteil (100) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Platte (2) auf ihrer unteren (21) und/oder oberen (22) Oberfläche einen Oberflächenzustand mit einer Rauheit von mehr als 6,3 µm Ra aufweist, um mit einem Halte- und/oder Zugwerkzeug reibschlüssig zusammenzuwirken.
  9. Drehteil (100) nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die Umfangsoberfläche (20) eine Zahnung ist, deren Achse mit der zweiten Drehachse (D2) zusammenfällt.
  10. Drehteil (100) nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Umfangsoberfläche (20) ein Nocken mit Bezug auf die zweite Drehachse (D2) ist und einen Winkelbezug aufweist, der durch den ersten Arm (4) oder durch den zweiten Arm (5) gebildet ist.
  11. Drehteil (100) nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass die vier Punkte (P11, P12, P13, P14; P21, P22, P23, P24) in Winkelrichtung im Wesentlichen in einem 90°-Abstand relativ zueinander angeordnet sind.
  12. Uhrwerk (200), umfassend mindestens ein Drehteil (100) nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass der Aufbau des Drehteils (100) auf die Welle (1) und auf die Platte (2) beschränkt ist, die miteinander zusammengefügt sind.
EP15727642.9A 2014-06-18 2015-06-05 Drehteil einer uhr Active EP3158402B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14172870.9A EP2957963B1 (de) 2014-06-18 2014-06-18 Drehteil einer Uhr
PCT/EP2015/062542 WO2015193123A1 (fr) 2014-06-18 2015-06-05 Mobile d'horlogerie

Publications (2)

Publication Number Publication Date
EP3158402A1 EP3158402A1 (de) 2017-04-26
EP3158402B1 true EP3158402B1 (de) 2018-08-22

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EP14172870.9A Active EP2957963B1 (de) 2014-06-18 2014-06-18 Drehteil einer Uhr
EP15727642.9A Active EP3158402B1 (de) 2014-06-18 2015-06-05 Drehteil einer uhr

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EP14172870.9A Active EP2957963B1 (de) 2014-06-18 2014-06-18 Drehteil einer Uhr

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Country Link
US (1) US10365608B2 (de)
EP (2) EP2957963B1 (de)
JP (1) JP6276864B2 (de)
CN (1) CN106537262B (de)
CH (1) CH709792A2 (de)
WO (1) WO2015193123A1 (de)

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EP3489767A1 (de) * 2017-11-27 2019-05-29 Montres Breguet S.A. Magnetische zentrierungsvorrichtung einer welle in einem uhrwerk
EP3667435B1 (de) * 2018-12-10 2022-06-01 Montres Breguet S.A. Einstellsystem der position eines ersten gezahnten drehteils in bezug auf eine halterung, auf der dieser ersten gezahnten drehteil drehbar befestigt ist, und uhr, die ein solches system umfasst
EP3667431A1 (de) 2018-12-13 2020-06-17 Montres Breguet S.A. Mobile anzeigeeinheit einer uhr mit reibungsregulierungsmechanismus
EP3772673B1 (de) 2019-08-08 2022-04-06 ETA SA Manufacture Horlogère Suisse Indexierungselement für uhren
CH716553B1 (fr) * 2019-08-30 2023-03-15 Lvmh Swiss Mft Sa Zenith Succursale De Lvmh Swiss Mft Sa Mécanisme horloger de génération d'une friction limitant le couple transmis entre deux pièces rotatitves et ressort de friction pour un tel mécanisme.
EP3825779A1 (de) * 2019-11-21 2021-05-26 ETA SA Manufacture Horlogère Suisse Bewegliche uhrwerkskomponente mit einem durch reibung gehaltenen element
JP7428556B2 (ja) * 2020-03-16 2024-02-06 セイコーウオッチ株式会社 時計部品、ムーブメント及び時計
EP3907564A1 (de) * 2020-05-05 2021-11-10 ETA SA Manufacture Horlogère Suisse Indexierungselement für uhren
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Also Published As

Publication number Publication date
WO2015193123A1 (fr) 2015-12-23
EP3158402A1 (de) 2017-04-26
CH709792A2 (fr) 2015-12-31
EP2957963A1 (de) 2015-12-23
US10365608B2 (en) 2019-07-30
US20170185040A1 (en) 2017-06-29
JP6276864B2 (ja) 2018-02-07
EP2957963B1 (de) 2017-10-25
JP2017503181A (ja) 2017-01-26
CN106537262A (zh) 2017-03-22
CN106537262B (zh) 2018-11-23

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