EP3422117A1 - Stossdämpfer-gleitlager für eine achse einer triebfeder einer uhr - Google Patents

Stossdämpfer-gleitlager für eine achse einer triebfeder einer uhr Download PDF

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Publication number
EP3422117A1
EP3422117A1 EP17178829.2A EP17178829A EP3422117A1 EP 3422117 A1 EP3422117 A1 EP 3422117A1 EP 17178829 A EP17178829 A EP 17178829A EP 3422117 A1 EP3422117 A1 EP 3422117A1
Authority
EP
European Patent Office
Prior art keywords
bearing
centering
wall
axis
support
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
EP17178829.2A
Other languages
English (en)
French (fr)
Other versions
EP3422117B1 (de
Inventor
Pierre Cusin
Ivan Hernandez
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.)
Nivarox Far SA
Nivarox SA
Original Assignee
Nivarox Far SA
Nivarox 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 Nivarox Far SA, Nivarox SA filed Critical Nivarox Far SA
Priority to EP17178829.2A priority Critical patent/EP3422117B1/de
Priority to JP2018104398A priority patent/JP6655126B2/ja
Priority to US15/997,767 priority patent/US10845763B2/en
Priority to RU2018121493A priority patent/RU2759829C2/ru
Priority to CN201810686914.6A priority patent/CN109212944B/zh
Publication of EP3422117A1 publication Critical patent/EP3422117A1/de
Application granted granted Critical
Publication of EP3422117B1 publication Critical patent/EP3422117B1/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
    • 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
    • G04B31/008—Jewel bearings
    • G04B31/0087—Jewel bearings with jewel hole only
    • 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
    • G04B31/02—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
    • G04B37/00—Cases

Definitions

  • the present invention relates to a shock-absorbing bearing for an axis of a moving part of a timepiece, in particular for a balance shaft, and comprising a game refocusing device.
  • the pivots of the axes of the mobiles turn in bearings mounted in the plate or in bridges.
  • the bearings it is customary to equip the bearings with a shock-absorbing mechanism. Indeed, as the pivots of the axis of a beam are generally thin and the weight of the balance is relatively high, the pivots can break under the effect of a shock in the absence of damper mechanism.
  • the configuration of a conventional shock absorber 1 is represented by the figure 1a .
  • An olive domed stone 2 is driven into a bearing support 3 commonly called kitten, on which is mounted a counter pivot stone 4.
  • the kitten 3 is held in abutment against the bottom of a bearing block 5 by a damping spring 6 arranged to exert an axial stress on the upper part of the counter-pivot stone 4.
  • the kitten 3 further comprises a conical outer wall arranged in correspondence with a conical inner wall disposed at the periphery of the bottom of the bearing block 5.
  • the kitten has an outer wall having a convex shape surface, that is to say curved.
  • the kitten 3 For proper operation, the kitten 3 must be centered on the axis of the damping bearing and flat which is not easy to guarantee due to the tolerance intervals of the components.
  • the centering position of the kitten 3 on the axis of rotation of the bearing has the disadvantage of being indefinite while in the second configuration, as illustrated by the figure 1c , the kitten 3 can pivot about an axis perpendicular to the axis of the damping bearing, which has the detrimental consequence of positioning the kitten 3 at an angle and the pivot and the counter-pivot mounted on the kitten.
  • An object of the invention is therefore to provide a shock absorbing bearing for an axis of a mobile of a timepiece, in particular for an axis of a balance wheel, whose tolerance intervals of the components of the damping bearing do not lead to the two undesired situations mentioned above.
  • the invention relates to a shock absorbing bearing for an axis of a mobile of a timepiece, in particular for a balance shaft.
  • the bearing comprises a bearing block comprising a housing, a bearing support arranged in the housing and comprising an outer centering wall, a pivot bearing mounted on the bearing support for receiving a pivot of the axis of a mobile and an elastic support arrangement of the pivot of the axis of the mobile.
  • the shock absorbing bearing further comprises a game refocusing device.
  • This game refocusing device comprises, on the one hand, a first part comprising a centering element having an inner centering wall in which the outer wall of the center is arranged. centering of the bearing support and, secondly, a second portion bearing on the bearing block and arranged to exert a return effect vis-à-vis the first part.
  • This return effect allows the centering element of the game refocusing device to fit against the bearing support independently of manufacturing variations and to ensure a centering and a flat support of the bearing support against the bottom of the block bearing.
  • the outer centering wall of the bearing support and the inner centering wall of the centering element are each a conical wall.
  • the taper of the inner centering wall of the centering element corresponds to the taper of the outer centering wall of the bearing support.
  • the outer centering wall of the bearing support is convex and the inner centering wall of the centering element is conical.
  • the outer centering wall of the bearing support is conical and the inner centering wall of the centering element is convex.
  • the bearing block comprises an inner wall comprising a cylindrical shoulder having a radial bearing surface and an axial bearing surface.
  • the second part of the game refocusing device comprises an annular portion arranged on the radial bearing surface of the shoulder and an elastic portion extending beyond the radial bearing surface in the direction of the bearing axis. .
  • the elastic portion comprises a plurality of flexible blades arranged along a circular path for example.
  • the flexible blades are configured to flex substantially axially under the effect of a shock as well as to compensate axial clearances and ensure the centering of the bearing support.
  • the centering element comprises an outer wall comprising a plurality of reinforcement blocks and centering, said blocks limiting the radial displacement of the bearing support and allowing, with the rest of the centering element, to compensate for axial clearances and to ensure the centering of the bearing support.
  • One and the other of the ends of each flexible blade are respectively connected to a corresponding block and to the annular portion of the second part of the game refocusing device.
  • each reinforcing block comprises a bearing surface arranged against the axial bearing surface of the shoulder to achieve the centering of the bearing support.
  • Each flexible blade comprises an outer side wall set back from the bearing surface of each block.
  • the axis of curvature of the flexible blades of the elastic portion corresponds to the axis of the bearing.
  • the annular portion of the second portion of the game refocusing device has a square or rectangular cross section.
  • the annular portion is preloaded (by driving, for example) in order to exert a force against a corner formed by the radial bearing surface of the shoulder and an axial bearing surface of the inner wall of the bearing block.
  • the bearing block comprises a base comprising an opening for the passage of the pivot axis of a mobile.
  • the bearing support bears against the base of the bearing block.
  • the centering element of the first part of the game refocusing device is remote from the base when the damping bearing is in a rest configuration, that is to say when the bearing is under the influence of no external constraint.
  • the game refocusing device is in a monolithic form.
  • a shock absorbing bearing for an axis of a mobile, in particular for a balance shaft, of a timepiece will now be described according to one embodiment with reference to the Figures 2 to 5 .
  • the shock absorbing bearing 10 comprises a bearing block 11 (hereinafter: bearing block), a bearing support 20, an elastic member 30 and a game centering device 40.
  • the outer casing of the bearing block 11 is shaped to be inserted into one or more orifices present on the plate or on one or more bridges of a watch movement (not shown).
  • the shock absorbing bearing 10 is used for example for a rocker, the racket and the bolt carrier are arranged around the bearing block 11.
  • This bearing block 11 comprises a base 12 having an opening 13, preferably cylindrical, for the passage of a pivot of the axis of the balance.
  • the bearing block 11 further comprises an inner side wall defining a housing for receiving the bearing support 20 more commonly called kitten.
  • the inner side wall comprises a main cylindrical wall 14a and a first and second complementary cylindrical walls 14b, 14c arranged on either side of the main cylindrical wall 14a, said lower cylindrical walls 14b and 14c upper.
  • each of the lower and upper cylindrical walls 14b, 14c is smaller than the diameter of the main wall 14a of the inner side wall of the bearing block 11.
  • the bottom wall 14b thus forms a cylindrical shoulder 16 with the main wall 14a.
  • shoulder 16 forms with the main wall 14a a corner having an axial bearing surface 15a and a radial bearing surface 16a extending over 360 ° and centered on the axis of the damping bearing 10.
  • the upper cylindrical wall 14c forms with the main wall 14a a radial bearing surface 15b arranged substantially facing the radial bearing surface 16a of the shoulder 16.
  • the upper wall 14c forms a flange for fixing of the elastic member 30. It is obvious that other means can be implemented to fix the elastic member 30 so that the rim formed by the upper wall 14c can be e deleted, the upper part of the main wall 14a is then right.
  • the kitten 20 has an inner side wall comprising a main cylindrical wall 21a and a complementary cylindrical wall 21b.
  • the pierced stone 24 is preferably fixed by driving but can also be glued or otherwise affixed to the main cylindrical wall of the inner kitten wall.
  • the diameter of the main cylindrical wall 21a of the kitten 20 is smaller than the diameter of the complementary cylindrical wall 21b so as to form a corner extending over 360 °.
  • the resilient support arrangement comprises a counter-pivot 25 mounted on the bearing support 20 and an elastic member 30 arranged to exert an axial force on the bearing support 20.
  • the counter-pivot 25 is cylindrical in shape and is mounted in the above the pierced stone 24. More particularly, the peripheral portion of the counter-pivot 25 is held against a radial bearing surface 22a and axial 22b of the corner of the kitten 20 under the action of the elastic member 30 which is mounted inside the housing of the bearing block 11.
  • the resilient member 30 may have the known shape of a lyre and has a lower side 31 whose central portion 31 has bears against the upper part of the counter- pivot 25 and an upper side 32 whose peripheral portion 32a is in abutment against the radial bearing surface 15b of the bearing block 11.
  • the elastic member 30 is in a prestressing configuration in order to exert an optimum axial force against the against p ivot 25 when the damping bearing 10 is in a so-called rest configuration in which it is not subjected to any external stress.
  • this resilient member may take a variety of forms and may be coupled to the bearing block 11 by other means.
  • the resilient member may have a shape partially covering the counter-pivot 25.
  • the game centering device 40 comprises a first part comprising a centering element 42 bearing against the kitten 20 and a second part comprising a peripheral zone bearing on the block of bearing 11 as will be described hereinafter so that the second part exerts a return effect vis-à-vis the first part.
  • the centering element 42 comprises an inner wall comprising a conical wall 43a and a cylindrical complementary wall 43b and an outer wall 44 of cylindrical shape.
  • a plurality of reinforcing blocks 45 are arranged on the outer wall 44.
  • four blocks 45 are preferably arranged at 90 ° to each other. Note, however, that an execution with a different number of blocks can be envisaged, for example three blocks arranged preferably at 120 ° relative to each other.
  • Each block 45 has a bearing surface 45a arranged to bear against the axial bearing surface 16b of the shoulder 16 of the bearing block 11.
  • the second part of the game refocusing device 40 comprises an annular portion 46 resting integrally on the radial bearing surface 16a of the shoulder 16 of the bearing block 11 and a second elastic portion extending beyond the surface of the radial support 16a in the direction of the axis of the bearing 10 and connected to the centering element 42.
  • the annular portion 46 is of substantially constant cross section and for example of square shape ( figure 2 ).
  • the annular portion 46 is prestressed to exert a force against the corner formed by the radial bearing surface 16a of the shoulder 16 and the axial bearing surface 15a of the main cylindrical wall 14a of the bearing block 11 to ensure the coupling of the recentering element 42 with the bearing block 11.
  • other forms of coupling can be implemented.
  • the elastic portion of the second portion comprises a plurality of flexible blades 47 arranged along a path, for example circular, concentric with the centering element 42. These blades 47 are connected to the reinforcing blocks 45 and are configured to flex substantially axially under the effect of a shock as well as to compensate axial clearances related in particular to manufacturing variations and to ensure the centering and flattening of the kitten 20 at the bottom of the bearing block 11.
  • the elastic portion preferably comprises four flexible blades 47 which each extend along an arc of a circle comprised between 60 ° and 85 ° but a different number of blades may be envisaged, for example three blades each extending along an arc of between 90 and 115 °.
  • each blade 47 is slightly set back from the bearing surface 45a of each block 45. This makes it possible to prevent the flexible blades 47 "rubbing" against the axial surface 16b of the shoulder 16 of the bearing block 11 when these blades flex axially to absorb the stresses caused by a substantially axial shock thus avoiding premature wear of the blades.
  • the ratio between the axial height of the centering element 42 and the axial height of the annular portion 46 is greater than two according to the embodiment illustrated in FIG. figure 2 whereas this ratio may be approximately equal to one according to an embodiment illustrated in FIG. figure 6 .
  • the outer side wall 47a of each blade 47 does not need to be set back from the bearing surface 45a of each block 45. Indeed, only the lower part of the The bearing surface 45a of each block 45 is arranged against the axial bearing surface 16b of the shoulder 16 so that the blades can flex radially above the radial bearing surface 16a of the shoulder 16. by a clearance between the inner side wall of the annular portion 46 and the outer side wall 47a of the flexible blades 47.
  • the dimensions of the flexible blades 47 and the material of the game centering device 40 must be carefully selected taking into account several considerations.
  • the blades must be able to bend axially sufficiently especially for the establishment of the elastic member 30 and not to lead to oversizing of this elastic member.
  • slides 47 do not should also not be too flexible to ensure a good (re) centering of the kitten.
  • the game refocusing device is preferably in the form of a monolithic component.
  • This component can be made of either metal or alloy, or silicon, or an elastomeric plastic material.
  • the spring is metal, alloy or silicon, one can achieve its contour for example by etching, or photolithography and galvanic growth.
  • a plastic material for example, the injection-molding technique will be used.
  • the shock absorbing bearing and its game refocusing device makes it possible to cancel the centering or support uncertainty of the kitten, linked to the intolerance of the components, thanks to the active effect of self-centering and catching up.
  • the centering element 42 of the game refocusing device according to the invention is recalled towards the end of the game refocusing device. the top.
  • the positioning of the inner centering wall of the centering element will fit against the outer conical wall of the bearing support centering at a height depending on the set of tolerances: if there is little play, the positioning is down, and if there is a lot of play, the positioning is high.
  • the bearing support can be both centered and supported flat, which is essential to this balance guide component.
  • the invention is not limited to the embodiments described with reference to the figures and variants could be envisaged without departing from the scope of the invention.
  • the counter-pivot and the elastic member could be made in one piece.
  • the centering walls of the bearing support and the centering element of the game centering device are of conical shapes, the conicity of the inner wall of the centering 43a of the centering element 42 corresponding preferably to the conicity of the outer centering wall 23b of the bearing support 20, other profiles of the centering walls could be adapted to perform the centering function.
  • the outer centering wall 23b of the bearing support 20 may be convex, the inner centering wall 43a of the centering element 42 being conical, or the outer centering wall of the bearing support may be conical, the inner wall centering piece 43a of the centering element 42 being convex.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Support Of The Bearing (AREA)
  • Vibration Prevention Devices (AREA)
EP17178829.2A 2017-06-29 2017-06-29 Stossdämpfer-gleitlager für eine achse einer drehteil einer uhr Active EP3422117B1 (de)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP17178829.2A EP3422117B1 (de) 2017-06-29 2017-06-29 Stossdämpfer-gleitlager für eine achse einer drehteil einer uhr
JP2018104398A JP6655126B2 (ja) 2017-06-29 2018-05-31 計時器の車セットのアーバーのためのショックアブソーバーベアリング
US15/997,767 US10845763B2 (en) 2017-06-29 2018-06-05 Shock absorber bearing for an arbor of a timepiece wheel set
RU2018121493A RU2759829C2 (ru) 2017-06-29 2018-06-13 Амортизационная опора для колесной оси часов
CN201810686914.6A CN109212944B (zh) 2017-06-29 2018-06-28 用于钟表轮副的心轴的减震轴承

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17178829.2A EP3422117B1 (de) 2017-06-29 2017-06-29 Stossdämpfer-gleitlager für eine achse einer drehteil einer uhr

Publications (2)

Publication Number Publication Date
EP3422117A1 true EP3422117A1 (de) 2019-01-02
EP3422117B1 EP3422117B1 (de) 2020-05-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP17178829.2A Active EP3422117B1 (de) 2017-06-29 2017-06-29 Stossdämpfer-gleitlager für eine achse einer drehteil einer uhr

Country Status (5)

Country Link
US (1) US10845763B2 (de)
EP (1) EP3422117B1 (de)
JP (1) JP6655126B2 (de)
CN (1) CN109212944B (de)
RU (1) RU2759829C2 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4060427A1 (de) * 2021-03-18 2022-09-21 Patek Philippe SA Genève Stossdämpfer für einen zapfen einer welle einem uhrendrehteils

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH705075A2 (fr) * 2011-06-08 2012-12-14 Kif Parechoc Sa Dispositif antichoc réglable.
EP3070544A1 (de) * 2015-03-20 2016-09-21 Manufacture et fabrique de montres et chronomètres Ulysse Nardin Le Locle SA Lager für eine uhr

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH245429A (fr) * 1944-02-28 1946-11-15 Erismann Gerard Pare-chocs pour palier de mouvement d'horlogerie.
CH292136A (fr) * 1949-06-04 1953-07-31 Abrahams Irene Palier pare-choc pour arbre d'horlogerie.
JP5657106B2 (ja) * 2010-06-22 2015-01-21 ザ・スウォッチ・グループ・リサーチ・アンド・ディベロップメント・リミテッド 時計の衝撃吸収軸受
EP2469357B2 (de) * 2010-12-21 2016-06-29 The Swatch Group Research and Development Ltd. Stoßdämpfer-Gleitlager für eine sich drehende Triebfeder einer Uhr
EP2806314A1 (de) * 2013-05-24 2014-11-26 The Swatch Group Research and Development Ltd. Stoßdämpfer mit Bajonett
CN203930351U (zh) * 2013-12-20 2014-11-05 Eta瑞士钟表制造股份有限公司 减震轴承、包括该减震轴承的机芯及包括该机芯的钟表
EP3076245B1 (de) * 2015-04-02 2021-03-17 CSEM Centre Suisse D'electronique Et De Microtechnique SA Dämpfungsvorrichtung, insbesondere für mikromechanische uhrkomponente
EP3101486B1 (de) * 2015-06-02 2018-10-03 ETA SA Manufacture Horlogère Suisse Herz eines uhrwerks oder eines chronographen
EP3220211B1 (de) * 2016-03-14 2018-10-10 ETA SA Manufacture Horlogère Suisse Stosssicherungssystem mit rotationssperre
EP3291027B1 (de) * 2016-08-30 2019-12-11 Montres Breguet S.A. Stossdämpfer mit membran

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH705075A2 (fr) * 2011-06-08 2012-12-14 Kif Parechoc Sa Dispositif antichoc réglable.
EP3070544A1 (de) * 2015-03-20 2016-09-21 Manufacture et fabrique de montres et chronomètres Ulysse Nardin Le Locle SA Lager für eine uhr

Also Published As

Publication number Publication date
EP3422117B1 (de) 2020-05-27
JP6655126B2 (ja) 2020-02-26
US20190004480A1 (en) 2019-01-03
CN109212944A (zh) 2019-01-15
JP2019012061A (ja) 2019-01-24
RU2018121493A (ru) 2019-12-16
US10845763B2 (en) 2020-11-24
CN109212944B (zh) 2021-04-06
RU2759829C2 (ru) 2021-11-18
RU2018121493A3 (de) 2021-10-04

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