EP3291027A1 - Stossdämpfer mit membran - Google Patents

Stossdämpfer mit membran Download PDF

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Publication number
EP3291027A1
EP3291027A1 EP16186312.1A EP16186312A EP3291027A1 EP 3291027 A1 EP3291027 A1 EP 3291027A1 EP 16186312 A EP16186312 A EP 16186312A EP 3291027 A1 EP3291027 A1 EP 3291027A1
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EP
European Patent Office
Prior art keywords
axis
shock absorbing
diameter
membrane
absorbing device
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
EP16186312.1A
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English (en)
French (fr)
Other versions
EP3291027B1 (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
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Filing date
Publication date
Application filed by Montres Breguet SA filed Critical Montres Breguet SA
Priority to EP16186312.1A priority Critical patent/EP3291027B1/de
Publication of EP3291027A1 publication Critical patent/EP3291027A1/de
Application granted granted Critical
Publication of EP3291027B1 publication Critical patent/EP3291027B1/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
    • 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

Definitions

  • the present invention relates to a shock absorber device for an axis of a mobile of a timepiece arranged on a support, said support being provided with an opening so that said axis can move in translation in said opening, said axis comprising, at each end, a tigeron cooperating with a pivoting element.
  • 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, pierced at its center, in which a kitten is arranged.
  • This kitten carries a pierced stone and a counter-pivot stone, the whole being put under stress by a lyre spring arranged between the support, which has flanges serving as points of support, and the kitten.
  • Another system is the fall arrest system in which the pivots of the beam are made so as to give them the shape of a cone and hold them in place by a small cup of corresponding shape, mounted on a leaf spring.
  • Watchmaking shock absorbers are usually constituted by mechanical springs and are still sized according to the old rules, according to practical rules considered as the best compromise between mechanical stability during operation and resistance to mechanical deformations.
  • the sprung balance shock absorbers, the parachutes and the lyres are dimensioned so as not to be activated up to relatively large shock accelerations (between 200 and 500 times the gravity), thanks to the spring preload. Beyond this threshold value, the spring can be deformed and absorb some of the impact energy. However, because of low mechanical damping of the metal blades used as shockproof, most of the energy is restored to the pendulum. The local deformation of the pendulum pivot is therefore very likely, already for relatively small shocks. This deformation, which has a considerable impact on the chronometric accuracy of the watch, is generally neglected because the standard certifying the chronometric stability of a COSC watch after a shock of one meter is not severe (60 s / j of difference).
  • the invention aims to overcome the disadvantages of the prior art by proposing to provide a shock absorbing system having a progressiveness in shock absorption while preventing the tigeron is exposed to the impact energy.
  • the present invention relates to a shock absorbing device for an axis of a mobile of a timepiece arranged on a support, said support being provided with an opening so that said axis can move in translation in said opening.
  • said axis comprising, at each end, a tigeron cooperating with a pivoting element, characterized in that said device further comprises at least a first elastic membrane spring arranged in the first opening, said first membrane being pierced with a hole through which said axis passes, said axis comprising at least a portion whose diameter is greater than that of the through hole of said first membrane so as to serve as an abutment of said axis in a consecutive movement consecutive to a shock.
  • the axis has a first diameter and comprises, at each end, an area of a second diameter from which the shank extends, the second diameter being smaller than the first diameter.
  • the transition between the first diameter zone and the second diameter zone is performed to form a shoulder.
  • the axis further comprises, in the zone having a second diameter, a first radially extending peripheral protruding portion, said projecting portion being spaced from the shoulder so that the diaphragm spring can insert into the space between said first projecting portion and said shoulder.
  • the device further comprises a second diaphragm spring arranged in the first opening so that the first diaphragm spring and the second diaphragm spring are located on either side of said first projecting portion.
  • the axis further comprises a second protruding portion arranged so that the first protruding portion and the second projecting portion are located on either side of the second diaphragm spring.
  • the thickness of said membrane or membrane spring is between 5 microns and 50 microns.
  • the membrane spring or springs may be made of a material selected from the list comprising: silicon, crystalline silicon carbide, ceramic silicon carbide, silicon nitride and metallic glass.
  • the membrane spring or springs may be made of a stretchable material of the polymer or elastomer resin type.
  • the pivoting element is a fall arrest system.
  • the pivoting element is a kitten and lyre system.
  • the present invention proceeds from the general idea of providing a shock absorbing system having a progressiveness in shock absorption.
  • a shock absorbing device 1 or shockproof system according to a first embodiment is shown.
  • This shock absorbing device or shockproof system 1 is mounted in a base member 100 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 dampen the impacts of an axis or shaft 200 of a timepiece mobile: a wheel or a balance wheel or an escape wheel.
  • This base element 100 is provided with an opening 102 opposite the axis 200 to be damped.
  • the axis 200 cooperates with a pivot element 300 by the tigeron intermediate 201 arranged at each end of the axis 200.
  • This pivot element 300 can be in several forms.
  • a first form is called a fall arrest device in which the pivots or tigeron 201 of the axis 200 of the mobile are made so as to give them the shape of a cone and hold them in place by a small cup 310 of corresponding shape mounted on a leaf spring 312 as visible at figure 1 .
  • the spring blade 312 may be mounted on a support 314 fixed to the plate 100.
  • a second form consists of a pivot element kitten and lyre.
  • Such an element comprises a kitten 324 placed in a housing 322 of a frame 320.
  • a pierced stone 325 and a counter pivot stone 326 are inserted.
  • the kitten is then retained in the housing of the frame via a spring 327 in the form of lyre deforming to absorb shocks as visible in the figure 2 .
  • the shock absorbing device further comprises one of the spring means 110 for damping the axis of the mobile.
  • These spring means 110 advantageously comprise at least one first diaphragm or diaphragm spring 112.
  • a diaphragm spring 112 is arranged at the opening 102 of the base member 100 in which the axis 200 is inserted.
  • Such a diaphragm spring 112 is used to prevent the most energetic impact during a shock being suffered by the pivot / skewer 201 of the axis of the mobile and thus to find an innovative solution for absorbing and dissipating the most of the shock energy by the impact of another part of said axis.
  • the diaphragm spring 112 is arranged at the opening 102 of the base member 101.
  • This membrane comprises a hole 113 through which the axis takes place.
  • the membrane 112 is designed to cooperate with the axis and, more particularly, with a shoulder 202 of said axis.
  • the axis 200 of the watch mobile comprises at each end a tiger 201 for its pivoting.
  • the axis 200 may be designed so as to have a main portion having a first diameter D1 and at the ends, a portion of a second diameter D2 smaller than the diameter of the main portion. Such narrowing may be linear or abrupt to form a shoulder 202.
  • the axis 200 moves and arms the traditional anti-shock 300 (lyre or parechute) but, after a relatively short axial stroke (in the Z direction), the axis 200, via its shoulder 202, abuts against the membrane 112 'with a liner'.
  • the movement of the axis 200 of the mobile thus begins to deform the membrane 112 which absorbs a considerable part of the impact energy by its deformation in extension (in the case of a stretch membrane) and / or flexion, in the case a standard thin elastic membrane. Therefore, the tigeron 201 is no longer the part of the axis that stores the maximum energy. The risks of rupture of the tigeron 201 are therefore reduced.
  • the thickness of the membrane 112 is advantageously between 5 microns and 50 microns (depending on the material used) and the membrane 112 may be made of silicon, silicon carbide (crystalline or ceramic), silicon nitride (in these three cases it can be manufactured by DRIE technology) or metal glass.
  • the membrane 112 may be made of a stretching material with a large energy dissipation such as, for example, elastomeric polymers or resins (especially silicone, but also PVC, PVDC, PE ).
  • elastomeric polymers or resins especially silicone, but also PVC, PVDC, PE .
  • the elastic properties in the direction of deformation Z will depend on the elongation applied in the XY plane, which is advantageously between 2% and 15% of the dimension of the membrane in the same direction of the elongation.
  • the opening 113 of the diaphragm 112 may be of circular, square, rectangular or polygonal geometry.
  • the membrane 112 could also not be complement closed around the axis of the mobile.
  • the dimension of the opening 113 is such that the projection of the membrane in the XY plane is partially superimposed on the projection of the axis 200 of the moving body in the same plane, the superposition being ensured by one or more portions of the axis. extending over a diameter substantially greater than the diameter of the tigeron at the end of the axis dedicated to pivoting. This is either a linear shrinkage or at least one shoulder.
  • the shaft 200 is made to have several shoulders and the membrane 112 is activated regardless of the direction of impact.
  • Such an embodiment consists of having a first shoulder 202a to make a transition between two zones of different diameters, the diameter being reduced towards the end.
  • the second shoulder 202b consists in providing, at the region of smaller diameter, a radially extending peripheral portion 203 protruding.
  • the two shoulders 202a, 202b are then arranged so that a space 204 exists between them. This space 204 is used for the membrane 112 to be placed there. Therefore, regardless of the axial displacement of the shaft 200 of the mobile following an impact, at least one membrane 112 will be biased to dissipate the energy of said shock.
  • the mobile shaft is designed similarly to that of the second embodiment.
  • a shaft 200 of mobile is to have a first shoulder 202a to make a transition between two zones of different diameters, the diameter being reduced in approximates the end.
  • the second shoulder 202b consists in providing, at the region of smaller diameter, a radially extending peripheral protrusion.
  • the two shoulders 202a, 202b are then arranged so that a space exists between them. This space is used so that a first membrane can be placed there.
  • the second membrane 112 is then placed on the other side of the protruding portion 203 so that the two membranes 112 are placed on either side of the projecting portion.
  • the displacement of the axis of the moving means causes a contact between the first shoulder and the first membrane and between the projecting portion and the second membrane 112. These two membranes 112 then deform to dissipate the energy of the shock, the latter being distributed over the two membranes.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Vibration Dampers (AREA)
EP16186312.1A 2016-08-30 2016-08-30 Stossdämpfer mit membran Active EP3291027B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16186312.1A EP3291027B1 (de) 2016-08-30 2016-08-30 Stossdämpfer mit membran

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16186312.1A EP3291027B1 (de) 2016-08-30 2016-08-30 Stossdämpfer mit membran

Publications (2)

Publication Number Publication Date
EP3291027A1 true EP3291027A1 (de) 2018-03-07
EP3291027B1 EP3291027B1 (de) 2019-12-11

Family

ID=56842756

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16186312.1A Active EP3291027B1 (de) 2016-08-30 2016-08-30 Stossdämpfer mit membran

Country Status (1)

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EP (1) EP3291027B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3422117B1 (de) * 2017-06-29 2020-05-27 Nivarox-FAR S.A. Stossdämpfer-gleitlager für eine achse einer drehteil einer uhr

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1140584A (fr) * 1956-01-24 1957-07-29 Paliers anti-chocs d'horlogerie et mécanismes d'horlogerie munis de ces palers
CH335173A (fr) * 1957-01-28 1958-12-31 Schwartzmann Marcel Auguste An Palier amortisseur de chocs pour mobile d'horlogerie
CH702314B1 (fr) * 2007-02-16 2011-06-15 Patek Philippe Sa Geneve Palier pour pièce d'horlogerie.
CH705905A2 (fr) * 2011-12-15 2013-06-28 Eta Sa Mft Horlogere Suisse Palier antichoc à membrane pour pièce d'horlogerie.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1140584A (fr) * 1956-01-24 1957-07-29 Paliers anti-chocs d'horlogerie et mécanismes d'horlogerie munis de ces palers
CH335173A (fr) * 1957-01-28 1958-12-31 Schwartzmann Marcel Auguste An Palier amortisseur de chocs pour mobile d'horlogerie
CH702314B1 (fr) * 2007-02-16 2011-06-15 Patek Philippe Sa Geneve Palier pour pièce d'horlogerie.
CH705905A2 (fr) * 2011-12-15 2013-06-28 Eta Sa Mft Horlogere Suisse Palier antichoc à membrane pour pièce d'horlogerie.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3422117B1 (de) * 2017-06-29 2020-05-27 Nivarox-FAR S.A. Stossdämpfer-gleitlager für eine achse einer drehteil einer uhr

Also Published As

Publication number Publication date
EP3291027B1 (de) 2019-12-11

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