EP3291025B1 - Stossdämpfer mit multileaf-blattfedern - Google Patents

Stossdämpfer mit multileaf-blattfedern Download PDF

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Publication number
EP3291025B1
EP3291025B1 EP16186316.2A EP16186316A EP3291025B1 EP 3291025 B1 EP3291025 B1 EP 3291025B1 EP 16186316 A EP16186316 A EP 16186316A EP 3291025 B1 EP3291025 B1 EP 3291025B1
Authority
EP
European Patent Office
Prior art keywords
blade
blades
pivot
support
pivot element
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
EP16186316.2A
Other languages
English (en)
French (fr)
Other versions
EP3291025A1 (de
Inventor
Deirdré LENOIR
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.)
Montres Breguet SA
Original Assignee
Montres Breguet 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 Montres Breguet SA filed Critical Montres Breguet SA
Priority to EP16186316.2A priority Critical patent/EP3291025B1/de
Priority to US15/675,830 priority patent/US10599100B2/en
Priority to JP2017157041A priority patent/JP6405426B2/ja
Priority to CN201710755936.9A priority patent/CN107797437B/zh
Publication of EP3291025A1 publication Critical patent/EP3291025A1/de
Priority to HK18110500.2A priority patent/HK1251304A1/zh
Application granted granted Critical
Publication of EP3291025B1 publication Critical patent/EP3291025B1/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
    • G04B17/32—Component parts or constructional details, e.g. collet, stud, virole or piton
    • 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
    • G04B31/04—Shock-damping bearings with jewel hole and cap jewel
    • 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
    • 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
    • G04B43/00—Protecting clockworks by shields or other means against external influences, e.g. magnetic fields
    • G04B43/002—Component shock protection arrangements

Definitions

  • the present invention relates to a shock-absorbing device for an axis of a moving body of a timepiece arranged on a support, said support being provided with a housing at least partially passing through so that a pivot element cooperating with a rod of the axis of the mobile is inserted therein, characterized in that said device further comprises a spring means comprising at least a first blade and a second blade.
  • a first system is a lyre system, that is to say that the plate or bridge is provided with a hole through which the shank of an axis can pass. This hole serves as a housing for a support, drilled in its center, in which a kitten is arranged. This kitten wears a pierced stone and a counter-pivot stone, the whole being put under stress by a lyre spring arranged between the support, which has edges serving as points of support, and the kitten.
  • Another system is the anti-fall system in which the balance pivots are made so as to give them the shape of a cone and to hold them in place by a small cup of corresponding shape, mounted on a leaf spring.
  • Watchmaking shock absorbers generally consist of mechanical springs and are still sized in the old fashioned way, following practical rules considered to be the best compromise between mechanical stability during operation and resistance to mechanical deformation.
  • the shock absorbers of the sprung balance, the parachutes and the lyres are dimensioned so as not to be activated until relatively large shock accelerations (between 200 and 500 times gravity), thanks to the spring preload. Beyond this threshold value, the spring can deform and absorb part of the energy of the shock.
  • relatively large shock accelerations between 200 and 500 times gravity
  • the spring can deform and absorb part of the energy of the shock.
  • Due to the low mechanical damping of the metal blades used as shock absorbers most of the energy is returned to the balance. Local deformation of the balance pivot is therefore very likely, already for relatively low shocks. This deformation, which has a considerable impact on the chronometric precision of the watch, is generally neglected because the standard certifying the chronometric stability of a COSC watch following a shock of one meter is not severe (60 s / j difference).
  • the object of the invention is to overcome the drawbacks of the prior art by proposing to provide.
  • the present invention relates to a shock-absorbing device for an axis of a moving part of a timepiece arranged on a support, said support being provided with a housing at least partially passing through so that an element of pivot cooperating with a shank of the axis of the mobile is inserted therein, characterized in that said device further comprises a spring means comprising at least a first blade and a second blade spaced apart from each other extending from the support and in this that the first blade is in contact with said pivot element and exerting a preload.
  • said blades extend in parallel.
  • said blades extend in the same direction.
  • said blades extend in a converging direction, the point of intersection of the blades being located opposite the pivot element.
  • said pivot element consists of a pivot stone free axially in said housing, this pivot stone comprising a recess in which the shank of the axis is inserted.
  • said pivot element consists of an axially free kitten in said housing, a pierced stone and a counter-pivot stone being driven into said kitten.
  • said pivot element and the first blade form one and the same part.
  • said pivot element is a pivot stone driven into a hole arranged on the first blade.
  • said first blade and the second blade have different rigidities, the first blade being less rigid than the second blade.
  • the spring means further comprise a third blade, the third blade being more rigid than the second blade.
  • the difference in rigidity between the different blades is obtained by differentiating the material between the blades and / or by having elastic blades of different sizes / shapes.
  • the elastic blades are fixed to the support by means of a stud provided with washers arranged between two elastic blades to allow their spacing.
  • the stud is attached to the support.
  • the stud is integral with the support.
  • said housing is completely through and has an inner section from which the elastic blades extend.
  • the present invention proceeds from the general idea of providing a shock absorbing system having progressiveness in shock absorption.
  • a shock absorbing device 1 or shock absorbing system according to a first embodiment is shown.
  • This shock-absorbing device or shock-absorbing system 1 is mounted in a base element 101 or support of a timepiece movement.
  • the plate or the bridges of the movement are the basic element in which the shockproof system 1 according to the invention is placed.
  • This shock-absorbing device is used to absorb the shocks of an axis 2 of a moving part of a timepiece: a cog or a balance or escape wheel.
  • This base element or support 101 is provided with an opening 102 facing the axis 2 to be damped.
  • the axis 2 cooperates with a pivot element 103.
  • This pivot element 103 may be a pivot stone comprising a recess for the shank of the axis to engage therein. This pivoting stone can be directly placed free in the opening or via a kitten in order to be able to move at least axially during an impact.
  • the shock-absorbing device further comprises one of the spring means 110 for damping the axis of the mobile.
  • These means springs advantageously comprise a plurality of elastic blades 112. These blades are arranged together to be superimposed.
  • the elastic blades extend from a stud 114.
  • This stud 114 is a part which is fixed, by screwing, gluing, welding, or brazing, to the plate or to the balance bridge.
  • the elastic blades therefore extend from one of their ends, fixed to the stud.
  • the blades 112 are spaced from one another via washers 115 so as to be able to deform independently of one another and to have an inter-blade space (preferably adjustable).
  • This inter-leaf space can be constant or be, at the level of the free end of the blades, greater or less than the space at the level of the stud as visible at figures 9 and 10 .
  • These blades may or may not extend in the same direction. In the case where the blades extend in different directions, the attachment points of the different blades are spaced so as to have the blades converging, the points of intersection of the different blades ideally located opposite the pivoting stone. as visible at figure 8 .
  • the assembly 110 formed by the elastic blades 112 and the stud 114 is then arranged so that one of the elastic blades, in particular the blade elastic opposite the pivot element, exerts a preload.
  • This is understood to mean that the elastic blade is in contact with the pivot element and exerts pressure on the latter.
  • This multi-blade configuration allows for progressive shock-absorbing rigidity, allowing a greater amount of (shock) energy to be dissipated through multiple 'impacts' and the use of highly dissipative materials.
  • the blades forming the spring means 110 are identical in size and material.
  • the operation of this set is as follows. During an impact, the apparent rigidity felt by the balance (or any other watchmaking mobile) gradually increases in identical discrete steps as a function of the deformation deflection (therefore as a function of the energy of the impact).
  • the discontinuity of rigidity takes place when one of the blades 112 is sufficiently bent to come into abutment against the following blade: at this moment, the energy of the impact (kinetic energy of the balance) is partially dissipated by an impact mechanism (characterized by a certain coefficient of restitution).
  • the discontinuity of rigidity therefore makes it possible to increase the dissipation of energy during the shock.
  • the blades 112 are different in materials and dimensions. Indeed, the dissipative effect and the stiffness profile can be optimized by using blades of different geometries or materials.
  • the other blades 112 can be adapted outside of these intervals, depending on the materials used, the weight of the balance and other geometric parameters of the movement.
  • the goal to be achieved is the same, that is to say to modify the rigidity of the blades 112 in order to obtain an adequate response to a shock.
  • the first elastic blade 112 that is to say the blade 112 in contact with the pivot element 103, is designed to be elastic enough which plasticizes rather late and other more rigid blades 112 allowing better dissipation of the shock energy.
  • the elastic blades 112 are arranged to replace the pivot element 103.
  • the elastic blades 112 and the pivot element 103 form a single assembly.
  • these elastic blades 112 are arranged so that the first blade, that is to say the blade closest to the base element (plate or bridge) serve as a pivot element 103.
  • the first blade that is to say the blade closest to the base element (plate or bridge) serve as a pivot element 103.
  • the first solution is to directly use the first blade 112 as a pivot element. It is understood by this that the elastic blade 112 is made of a first material and that the shank of the axis comes into contact with this first material.
  • the elastic blade 112 may be provided with a recess facilitating the placement of the shank of the axis.
  • the first elastic blade 112 carries a pivot element 103 '.
  • the elastic blade 113 has a hole, passing through or not, in which a pivot element is arranged.
  • This pivot element will preferably be a pivot stone in a ruby-type material. This pivot stone will be fixed by gluing, welding, brazing or any other possible fixing methods.
  • the elastic blades 112 extend inside the opening of the base element 101, that is to say the plate or the bridge.
  • the opening 102 has an inner slice or wall from which the resilient blades 112 extend.
  • This variant advantageously makes it possible to be more compact by directly integrating the blades 112 into the opening 102, which limits the thickness of the system.
  • the elastic leaves 112 forming the spring means 110 are integral with the support element 101.
  • the first consists in using the metallic glasses known for their shaping properties when they are heated between their glass transition temperature Tg and their crystallization temperature Tx.
  • Another solution consists in producing the assembly formed of the spring means and of the base element in silicon using a Liga or Drie method.
  • the opening 102 of the base element serves to drive out therein a support block 200 provided with a housing 201 and a through hole 202 in order to accommodate the pivot element 103 therein.
  • the pivot element which will be a single stone or a chaton 204 with a drilled stone 205 and a counter-pivot stone 206 will rest in the bottom of the support block as visible at figure 11 .

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Vibration Dampers (AREA)
  • Springs (AREA)
  • Electromechanical Clocks (AREA)

Claims (14)

  1. Shock-Absorber-Vorrichtung (1) für eine Welle (2) eines an einem Träger (101) angeordneten Drehteils einer Uhr, wobei der Träger mit einem Aufnahmeraum (102) versehen ist, der zumindest teilweise durchgängig ist, damit ein Schwenkelement (103), das mit einem Tigeron der Welle des Drehteils zusammenwirkt, darin eingesetzt werden kann, wobei die Vorrichtung ferner ein Federmittel (110) mit mindestens einem ersten Blatt (112) und einem zweiten Blatt (112), die voneinander beabstandet sind und sich von dem Träger erstrecken, umfasst, dadurch gekennzeichnet, dass nur das erste Blatt mit dem Schwenkelement in Kontakt steht und eine Vorspannung ausübt und dass das erste Blatt (112) und das zweite Blatt unterschiedliche Steifigkeiten besitzen, wobei das erste Blatt weniger steif ist als das zweite Blatt.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass sich die Blätter parallel erstrecken.
  3. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sich die Blätter in derselben Richtung erstrecken.
  4. Vorrichtung nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, dass sich die Blätter in konvergierenden Richtungen erstrecken, wobei sich der Schnittpunkt der Blätter gegenüber dem Schwenkelement befindet.
  5. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Schwenkelement (103) aus einem in dem Aufnahmeraum axial freien Zapfenstein besteht, wobei dieser Zapfenstein eine Einsenkung aufweist, in die der Tigeron der Welle eingesetzt ist.
  6. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Schwenkelement aus einem in dem Aufnahmeraum axial freien Futter (204) besteht, wobei ein Lochstein (205) und ein Deckstein (206) in das Futter eingebracht sind.
  7. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Schwenkelement und das erste Blatt einteilig ausgebildet sind.
  8. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Schwenkelement ein Zapfenstein (103') ist, der in ein in dem ersten Blatt ausgebildeten Loch eingebracht ist.
  9. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Federmittel ferner ein drittes Blatt aufweisen, wobei das dritte Blatt steifer ist als das zweite Blatt.
  10. Vorrichtung nach den Ansprüchen 1 oder 9, dadurch gekennzeichnet, dass der Unterschied der Steifigkeit zwischen den verschiedenen Blättern (112) durch Verwendung verschiedener Materialien für die Blätter und/oder durch Verwendung elastischer Blätter unterschiedlicher Abmessungen/Formen erhalten wird.
  11. Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die elastischen Blätter an dem Träger über ein Klötzchen (114) befestigt sind, das mit Unterlegscheiben versehen ist, die zwischen zwei elastischen Blättern angeordnet sind, um ihren gegenseitigen Abstand zu ermöglichen.
  12. Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, dass das Klötzchen an den Träger befestigt ist.
  13. Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, dass das Klötzchen mit dem Träger einteilig ausgebildet ist.
  14. Vorrichtung nach Anspruch 13, dadurch gekennzeichnet, dass der Aufnahmeraum vollständig durchgängig ist und einen inneren Block aufweist, von dem sich die elastischen Blätter erstrecken.
EP16186316.2A 2016-08-30 2016-08-30 Stossdämpfer mit multileaf-blattfedern Active EP3291025B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP16186316.2A EP3291025B1 (de) 2016-08-30 2016-08-30 Stossdämpfer mit multileaf-blattfedern
US15/675,830 US10599100B2 (en) 2016-08-30 2017-08-14 Multi-blade shock absorber
JP2017157041A JP6405426B2 (ja) 2016-08-30 2017-08-16 マルチブレード緩衝装置
CN201710755936.9A CN107797437B (zh) 2016-08-30 2017-08-29 多叶片式减震装置
HK18110500.2A HK1251304A1 (zh) 2016-08-30 2018-08-15 多葉片式減震裝置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16186316.2A EP3291025B1 (de) 2016-08-30 2016-08-30 Stossdämpfer mit multileaf-blattfedern

Publications (2)

Publication Number Publication Date
EP3291025A1 EP3291025A1 (de) 2018-03-07
EP3291025B1 true EP3291025B1 (de) 2020-08-19

Family

ID=56842758

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16186316.2A Active EP3291025B1 (de) 2016-08-30 2016-08-30 Stossdämpfer mit multileaf-blattfedern

Country Status (5)

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US (1) US10599100B2 (de)
EP (1) EP3291025B1 (de)
JP (1) JP6405426B2 (de)
CN (1) CN107797437B (de)
HK (1) HK1251304A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4242753A1 (de) * 2022-03-11 2023-09-13 ETA SA Manufacture Horlogère Suisse Vorrichtung zum führen einer welle einer unruh mit spiralfeder

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
CH716041A1 (fr) * 2019-04-04 2020-10-15 Csem Ct Suisse Delectronique Microtechnique Sa Rech Developpement Dispositif antichoc et oscillateur mécanique horloger à guidage flexible disposant d'un tel dispositif antichoc.
EP3971655A1 (de) * 2020-09-18 2022-03-23 ETA SA Manufacture Horlogère Suisse Stossdämpfungsschutz mit anschlag eines resonatormechanismus mit flexibler drehführung
EP4321339A1 (de) * 2022-08-12 2024-02-14 CSEM Centre Suisse d'Electronique et de Microtechnique SA - Recherche et Développement Verfahren zur herstellung einer dämpfungsvorrichtung zur schwingungsdämpfung und/oder stossdämpfung

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EP2796940A3 (de) * 2013-04-23 2016-05-04 Rolex Sa Uhrkomponente zur Aufnahme eines Organs durch Einpressen
EP2799937B1 (de) * 2013-05-01 2020-09-16 Rolex Sa Dämpfungskörper eines Unruh-Oszillators einer Uhr
EP2816423A1 (de) * 2013-06-21 2014-12-24 ETA SA Manufacture Horlogère Suisse Stoßsicheres System mit gesicherter Montage
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Publication number Priority date Publication date Assignee Title
EP4242753A1 (de) * 2022-03-11 2023-09-13 ETA SA Manufacture Horlogère Suisse Vorrichtung zum führen einer welle einer unruh mit spiralfeder

Also Published As

Publication number Publication date
HK1251304A1 (zh) 2019-01-25
JP2018036261A (ja) 2018-03-08
EP3291025A1 (de) 2018-03-07
JP6405426B2 (ja) 2018-10-17
US20180059619A1 (en) 2018-03-01
CN107797437B (zh) 2020-07-24
US10599100B2 (en) 2020-03-24
CN107797437A (zh) 2018-03-13

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