EP3080666B1 - Verfahren zur herstellung eines stosssicheres system aus zwei verschiedenen materialien für uhr - Google Patents

Verfahren zur herstellung eines stosssicheres system aus zwei verschiedenen materialien für uhr Download PDF

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Publication number
EP3080666B1
EP3080666B1 EP14811820.1A EP14811820A EP3080666B1 EP 3080666 B1 EP3080666 B1 EP 3080666B1 EP 14811820 A EP14811820 A EP 14811820A EP 3080666 B1 EP3080666 B1 EP 3080666B1
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EP
European Patent Office
Prior art keywords
pivot
insert
support
bearing
arbor
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Active
Application number
EP14811820.1A
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English (en)
French (fr)
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EP3080666A2 (de
Inventor
Jean-Jacques Born
Jean-Claude Martin
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Swatch Group Research and Development SA
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Swatch Group Research and Development SA
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Priority to EP14811820.1A priority Critical patent/EP3080666B1/de
Publication of EP3080666A2 publication Critical patent/EP3080666A2/de
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Publication of EP3080666B1 publication Critical patent/EP3080666B1/de
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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
    • G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
    • G04B31/004—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor characterised by the material used
    • G04B31/016—Plastic bearings
    • 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
    • G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
    • G04B31/02—Shock-damping bearings
    • 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
    • G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
    • G04B31/06—Manufacture or mounting processes

Definitions

  • the present invention relates to the manufacture of a shock-absorbing bearing for an axis of a mobile of a timepiece.
  • the shaft comprises a beam, comprising a support, said support being provided with a housing adapted to receive a suspended pivot system in which the tigeron is inserted.
  • the technical field of the invention is the technical field of fine mechanics.
  • the present invention relates to the manufacture of bearings for timepieces, and more particularly of the type for damping shocks.
  • Mechanical watch manufacturers have long designed numerous devices for absorbing the energy resulting from a shock by an axis of a mobile, by abutting against a wall of the hole of the base block through which it passes, while allowing a momentary movement of the tigeron before it is returned to its rest position under the action of a spring.
  • Requirement EP 2,605,086 describes a shock-absorbing bearing for an axis of a mobile of a timepiece, said axis comprising a tigeron, said bearing comprising a support provided with a housing adapted to receive a pivot system comprising a pivot module in which the tigeron is inserted and resilient means arranged to allow said pivot module to be suspended mounted and to exert on said pivot module at least one axial force. Only one pre-assembly step in which a diaphragm spring is overmoulded on the insert is described.
  • the figure 1 illustrates a shock absorbing device or shock absorbing bearing 1 comprising a support 2.
  • This support has a housing 3 in which is arranged a pivot system 4 whose purpose is to damp, at least in part, the shocks suffered by the axis 5 of pendulum.
  • the pivot system 4 comprises elastic means 4a and a pivot module 4b.
  • the elastic means are, in this example, in the form of a membrane.
  • These elastic means are in the form of a base in the form of a disk comprising a lower face and an upper face and having a central orifice, the face bottom facing the bottom of the support that is to say the hole 6 in which the balance shaft terminated by a tigeron 5a passes.
  • the pivot module In the center of this disc is fixed the pivot module.
  • This disc comprises, at its periphery, a peripheral flange 4c extending in an axial direction, that is to say in a direction tending to move away from the upper face.
  • this rim extends so that the surface of the horizontal plane to the disk increases as the height of the rim increases
  • the pivot system 4 is placed on the bottom of the support and the flange of the elastic means is supported for example on an outgrowth 2a of the support as visible in FIG. figure 1 .
  • Such a pivot system is made of plastic so that it can be manufactured using injection and molding techniques.
  • a disadvantage of such a shock absorber system is that it does not withstand shocks. Indeed, if the pivot does not break, the plastic is marked by the pivot. This marking of the plastic constituting the pivot system comes from the elastic part which has its Young's modulus which increases during the impact. However, the Young's modulus is also called modulus of elasticity (generally expressed in GPa) characterizes the resistance to the deformation of a material.
  • the object of the invention is to overcome the disadvantages of the prior art by proposing to provide a shockproof timepiece system which has constant damping and friction characteristics.
  • the invention relates to the manufacture of a shock absorbing bearing according to claims 1 and 2.
  • the pivoting means is made of a metallic material and comprises a recess in which is inserted an insert. made of a synthetic material and with which the tigeron cooperates.
  • the insert is made of a polymeric material.
  • the material of the insert is loaded.
  • the polymer of the insert is chosen from the group comprising polyoxymethylene, polyamide, polyetheretherketone and polyphenylene sulphide.
  • said pivoting means is a pellet comprising an annular part, a central part and elastic arms connecting the central part to the annular part, the central part comprising a recess so that an insert with which the pivot can cooperate to rotate freely.
  • the pivoting means comprises three resilient arms angularly offset by an angle of 120 °.
  • the insert comprises a hole for insertion of the pivot, this hole consisting of an opening having a first straight or rectangular portion followed by a trapezoidal portion.
  • the present invention proceeds from the general inventive idea of providing a shock absorbing or shockproof system having greater reliability and providing better positioning.
  • the damping bearing or shockproof system 100 is shown in FIG. figure 2 , which illustrates a part of a timepiece provided with bearings according to the invention.
  • the damping bearing 100 represented at figure 2 comprises a frame comprising a support 103 in which a lower bearing 101 and an upper bearing 102 are mounted. These bearings 101, 102 are mounted in holes in said support 103.
  • a mobile 105 which may be a rocker, is mounted on an axis 120 pivoting in these bearings. This axis 120 is provided at its two ends with tigers 121 carrying pivots 122.
  • the upper bearing 102 comprises an annular piece 127 in the form of a disc having an inner peripheral wall 128.
  • This annular piece also comprises a flange 129 located on the disc surface and contiguous to the wall.
  • This annular piece 127 is pierced with a central hole 130.
  • the bearing 102 further comprises a pivoting means 126 'disposed in the housing formed by the peripheral wall 128 and the flange 129.
  • the pivoting means 126' is placed on the rim 129 at its periphery so as to be suspended.
  • This pivoting means 126 ' is fixed to the annular piece 127, for example by driving, gluing, latching or held by a ring.
  • pivoting means 126 ' there is therefore a space between the pivoting means 126 ', and the bottom of the housing formed by the peripheral wall 128 and the flange 129.
  • the pivoting means are therefore in contact with the support 101 only at the level of the fixing with this one. The fact of being suspended allows the pivot means 126 'to be able to refocus perfectly following a displacement due to a shock.
  • the lower bearing 101 is identical in design to the upper bearing 102, that is to say that it comprises an annular piece 124 in the form of a disk having a peripheral wall. This annular piece also comprises a rim located on the disk surface and contiguous to the wall. This annular piece 124 is pierced with a central hole 125.
  • the bearing 102 further comprises a pivoting means 126 disposed in the housing formed by the peripheral wall and the flange in a suspended manner. This pivoting means 126 is fixed to the annular piece 124 for example by driving, gluing, latching or held by a ring.
  • the dimensions of the lower bearing 101 will be smaller than those of the upper bearing 102 to show that the size of the bearing is easily adjustable and can be reduced. Of course, the dimensions of the upper bearing 102 and the lower bearing 101 may be identical.
  • the lower bearing 101 or greater 102 can be arranged so that the pivot means 126, 126 'is directly fixed in the support 103 by driving or gluing or welding or brazing.
  • Said bearing 101, 102 may comprise a piece in the form of a ring which serves to hold the pivoting means 126, 126 'and a piece in the form of a disc having a peripheral rim and pierced in its shape. center of a hole. This pierced disc shaped piece is used as a stop and its flange is used to provide a suspended system.
  • the pivoting means 126, 126 ' is thus held radially by the walls of the hole made in the support and axially by the annular piece and the disc-shaped piece pierced.
  • the pivoting means 126, 126 ', visible at the figure 3 are in the form of a pellet comprising a full annular portion 126a, a central portion 126b and elastic arms 126d. These arms 126d are wound substantially spirally so that they connect the central portion 126b to the annular portion 126a.
  • the pivoting means 126, 126 ' comprise three arms 126d.
  • the pivoting means 126 'of the upper bearing 102 are mounted in the annular part 127 of said upper bearing 102.
  • the pivoting means 126, of the lower bearing 101 are mounted in the annular piece 124 inserted into the hole of the support 103.
  • the central portion of the pivoting means 126, 126 ' has a recess 126e in which an insert 1260 is placed.
  • This insert 1260 is used so as to be provided with a hole 1261 in which the spindle of the shaft is inserted.
  • This configuration makes it possible to have the pivoting means 126, 126 'in the form of a pellet comprising a full annular portion 126a, a central portion 126b and elastic arms 126d, which are made of a first material and the insert 1260 which is made of a second material.
  • the wheel is then pivotally mounted being engaged at its pivots 122 in non-through holes 1261 of the insert 1260 and at its tigger 121 in the holes of the support 103.
  • the first material used for the pivot means 126, 126 ' is a metallic material while the second material used for the insert 1260 is a synthetic material such as plastic.
  • This plastic material may be a polymer selected from the group consisting of polyoxymethylene, polyamide, polyetheretherketone, polyphenylene sulfide.
  • the use of a metallic material for the elastic means that is to say the pivoting means 126, 126 'allows to have elastic means whose Young's modulus does not vary with the speed.
  • the resistance of the resilient means opposite the pivot does not increase and the force between the pivot and the bearing remains stable.
  • the metals have a higher Young's modulus than for a plastic type material (for example the Young's modulus of Phynox (Cobalt Co + Chromium Cr + Nickel Ni + Molybdenum Mo) is 203 GPa, that of Titanium of 114 GPa, that of plexiglass of 2.38GPa and that of polyamide from 3 to 5 GPa).
  • Another advantage of this choice of materials is that it makes it possible to have a more advantageous material for the pivot function. Indeed, the friction of a metal part on another metal part leads to heating and rapid wear of the pivot, lubrication is necessary to mitigate this heating.
  • the plastic material of the insert 1260 is a charged polymer.
  • charge is meant any inert, mineral or vegetable substance which, added to a base polymer, makes it possible to appreciably modify its mechanical, electrical or thermal properties or its appearance.
  • the mobile 105 In the event of an axial impact, the mobile 105 is subjected to a force that is proportional to the acceleration experienced. This force is transmitted to the bearings by means of the pivots 122. The effect of this force and to deform the elastic arms 126d of the pivoting means 126, 126 'until the axis 120 of the wheel comes to bear , through its tigger 121, against the wall of the holes 1261. In this case, the wheel is then stopped by the axis 120 which abuts on the support 127, 124 serving as a stop. Since the dimensions of the axis 120 are much larger than those of the pivots 122, the energy produced during the impact against the stop is thus transmitted to the axis 120 so as not to damage the pivots 122.
  • the elastic arms 126d are dimensioned so that the tigger 121 come into contact with the annular parts as soon as an acceleration of about 500g is reached.
  • the pivoting means 126, 126 ' are formed by three curved arms 126d whose attachment points, respectively to the annular portion 126a and the central portion 126b, are angularly offset by 120 degrees. It is obvious that the elastic function could be ensured with a different number of arms, or with other forms.
  • the insert 1260 comprises a hole 1261 conical so that the end of the tigeron can be inserted to allow a difference in amplitude between the different positions of the watch minimized.
  • This conical 1261 hole known from the patent EP 2 142 965 consists of an opening having a first straight or rectangular portion that is to say having a straight or rectangular profile followed by a trapezoidal portion that is to say having a trapezoidal profile.
  • the rounded tip of the pivot 122 is dimensioned so that its rounded surface can bear against the inclined edge of the trapezoidal profile portion.
  • the invention also relates to a method for mounting such a shock absorbing bearing 100.
  • a method for mounting consists in separately producing the pivoting means 126, 126 'and the insert 1260.
  • the insert 1260 is placed on the axis 120 at its two ends of tibernums 121 carrying pivots 122. This arrangement of the insert 1260 serves to protect the pivots 122 so that the latter do not receive of shocks.
  • the system is mounted.
  • the pivoting means 126, 126 ' are mounted in the supports 103.
  • the axis 120 is then mounted between the lower bearing 101 and the upper bearing 102.
  • the axis 120 is manipulated so that each insert 1260 mounted on the pivots 122 is inserted by force into the recess 126e of the pivot means 126, 126 'to accommodate them.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Sliding-Contact Bearings (AREA)
  • Vibration Dampers (AREA)
  • Electromechanical Clocks (AREA)
  • Purses, Travelling Bags, Baskets, Or Suitcases (AREA)

Claims (3)

  1. Verfahren zum Herstellen eines Stoßdämpferlagers eines Drehteils eines Zeitmessgeräts, wobei das Lager eine Welle (120) aufweist und die Welle einen Tigeron (121) und einen Drehzapfen (122) umfasst, wobei das Dämpferlager ferner einen Träger (102, 103) aufweist, der mit einem zur Aufnahme eines gefederten Drehmittels (126, 126') vorgesehenen Aufnahmeraum versehen ist, dadurch gekennzeichnet, dass das Verfahren die folgenden Schritte umfasst:
    a) Bereitstellen des Trägers (102, 103) und des Drehmittels (126, 126'), das eine Aussparung (126e) aufweist, dann Anordnen des Drehmittels (126, 126') in dem Aufnahmeraum des Trägers (102, 103);
    b) Bereitstellen der Welle (120) und eines Einsatzes (1260), der ein Loch (1261) aufweist, das das Einsetzen des Drehzapfens (122) ermöglicht;
    c) Anordnen des Einsatzes (1260) an der Welle (120) in einer Weise, dass der Drehzapfen (122) der Welle in das Loch (1261) des Einsatzes (1260) eingesetzt wird;
    d) Montieren des Stoßdämpferlagers durch Betätigen der Welle (120) in einer Weise, dass der an der Welle (120) montierte Einsatz (1260) in die Aussparung (126e) eindringt.
  2. Verfahren zum Herstellen eines Stoßdämpferlagers eines Drehteils eines Zeitmessgeräts, wobei die Welle (120) einen Tigeron (121) und einen Drehzapfen (122) umfasst, wobei das Lager einen Träger (102, 103) aufweist, der mit einem zur Aufnahme eines gefederten Drehmittels (126, 126') vorgesehenen Aufnahmeraum versehen ist, dadurch gekennzeichnet, dass das Verfahren die folgenden Schritte umfasst:
    A) Bereitstellen des Trägers (102, 103) und des Drehmittels (126, 126'), das eine Aussparung (126e) aufweist, dann Anordnen des Drehmittels (126, 126') in dem Aufnahmeraum des Trägers (102, 103);
    B) Bereitstellen der Welle (120) und Abformen des Drehzapfens (122) mit einem Material in einer Weise, dass ein Einsatz (1260) gebildet wird;
    C) Montieren des Stoßdämpferlagers durch Betätigen der Welle (120) in einer Weise, dass der Einsatz (1260) an der Welle (120) in die Aussparung (126e) eindringt.
  3. Verfahren zur Herstellung eines Stoßdämpferlagers nach den Ansprüchen 1 oder 2, dadurch gekennzeichnet, dass das Drehmittel (126, 126') aus einem metallischen Material hergestellt ist und dass der Einsatz (1260) aus einem Kunststoff hergestellt ist.
EP14811820.1A 2013-12-11 2014-12-05 Verfahren zur herstellung eines stosssicheres system aus zwei verschiedenen materialien für uhr Active EP3080666B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14811820.1A EP3080666B1 (de) 2013-12-11 2014-12-05 Verfahren zur herstellung eines stosssicheres system aus zwei verschiedenen materialien für uhr

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP13196736.6A EP2884348A1 (de) 2013-12-11 2013-12-11 Stoßsicheres System aus zwei verschiedenen Materialien für Uhr
PCT/EP2014/076783 WO2015086472A2 (fr) 2013-12-11 2014-12-05 Système antichoc de pièce d'horlogerie bi-matiere
EP14811820.1A EP3080666B1 (de) 2013-12-11 2014-12-05 Verfahren zur herstellung eines stosssicheres system aus zwei verschiedenen materialien für uhr

Publications (2)

Publication Number Publication Date
EP3080666A2 EP3080666A2 (de) 2016-10-19
EP3080666B1 true EP3080666B1 (de) 2018-09-05

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EP13196736.6A Withdrawn EP2884348A1 (de) 2013-12-11 2013-12-11 Stoßsicheres System aus zwei verschiedenen Materialien für Uhr
EP14811820.1A Active EP3080666B1 (de) 2013-12-11 2014-12-05 Verfahren zur herstellung eines stosssicheres system aus zwei verschiedenen materialien für uhr

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EP13196736.6A Withdrawn EP2884348A1 (de) 2013-12-11 2013-12-11 Stoßsicheres System aus zwei verschiedenen Materialien für Uhr

Country Status (6)

Country Link
US (1) US10012955B2 (de)
EP (2) EP2884348A1 (de)
JP (1) JP6147437B2 (de)
CN (1) CN105814496B (de)
CH (1) CH708936B1 (de)
WO (1) WO2015086472A2 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3291025B1 (de) * 2016-08-30 2020-08-19 Montres Breguet S.A. Stossdämpfer mit multileaf-blattfedern
WO2018114149A1 (fr) * 2016-12-23 2018-06-28 Comadur Sa Palier support d'axe a frottement reduit
EP3543800B1 (de) * 2018-03-20 2021-11-10 Omega SA System eines drehbaren aussenrings einer armbanduhr, das einen federring umfasst
EP3671368B1 (de) * 2018-12-20 2022-11-23 The Swatch Group Research and Development Ltd Lager, insbesondere zur stossdämpfung, und drehteil eines uhrwerks
EP3786726B1 (de) * 2019-09-02 2023-10-11 Valsigna GmbH Reibungsverhindernde hülle für schwenkbare elemente eines mechanischen uhrwerks
EP3929666A1 (de) * 2020-06-26 2021-12-29 ETA SA Manufacture Horlogère Suisse Mobiles drehsystem eines uhrwerks
EP3929667A1 (de) * 2020-06-26 2021-12-29 ETA SA Manufacture Horlogère Suisse Mobiles drehsystem eines uhrwerks

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH311292A (fr) * 1951-12-17 1955-11-30 Schild Sa A Palier pour mobiles de mouvement d'horlogerie.
CH443157A (fr) * 1964-11-05 1968-01-31 Tissot Horlogerie Palier amortisseur de choc pour pièce d'horlogerie
CH1052871A4 (de) * 1971-07-15 1974-09-13
CH495673A4 (fr) * 1973-04-06 1976-10-29 Seitz Sa Dispositif de pivotement de l'ace d'un mobile d'horlogerie
EP1696286B1 (de) * 2005-02-23 2010-12-29 ETA SA Manufacture Horlogère Suisse Stoßdämpfende Uhrenlagerung
EP1986059A1 (de) 2007-04-26 2008-10-29 ETA SA Manufacture Horlogère Suisse Schwenkenvorrichtung einer Welle in einer Uhr
CH704640B1 (fr) * 2008-03-18 2012-09-28 Complitime Sa Organe de pivotement.
JP5455115B2 (ja) * 2009-10-07 2014-03-26 セイコーインスツル株式会社 時計用軸受、ムーブメントおよび携帯用時計
WO2011161139A1 (fr) * 2010-06-22 2011-12-29 The Swatch Group Research And Development Ltd Systeme antichoc de piece d'horlogerie
CH705907A2 (fr) * 2011-12-15 2013-06-28 Eta Sa Mft Horlogere Suisse Palier antichoc de pièce d'horlogerie en polymère.
EP2605086A1 (de) * 2011-12-15 2013-06-19 ETA SA Manufacture Horlogère Suisse Stoßsicheres System mit Membran für Uhren
EP2677370A1 (de) * 2012-06-21 2013-12-25 ETA SA Manufacture Horlogère Suisse Stoßsicheres System zur vereinfachten Montage für Uhr

Also Published As

Publication number Publication date
JP2016540217A (ja) 2016-12-22
CN105814496A (zh) 2016-07-27
EP3080666A2 (de) 2016-10-19
US10012955B2 (en) 2018-07-03
US20160306326A1 (en) 2016-10-20
CH708936A2 (fr) 2015-06-15
EP2884348A1 (de) 2015-06-17
JP6147437B2 (ja) 2017-06-14
WO2015086472A3 (fr) 2015-08-06
CH708936B1 (fr) 2019-07-31
WO2015086472A2 (fr) 2015-06-18
CN105814496B (zh) 2019-11-01

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