EP4033307A1 - Baugruppe mit einem rotierenden beweglichen körper aus nichtmagnetischem material und einer mit einem konus versehenen lagerbuchse - Google Patents

Baugruppe mit einem rotierenden beweglichen körper aus nichtmagnetischem material und einer mit einem konus versehenen lagerbuchse Download PDF

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Publication number
EP4033307A1
EP4033307A1 EP21152892.2A EP21152892A EP4033307A1 EP 4033307 A1 EP4033307 A1 EP 4033307A1 EP 21152892 A EP21152892 A EP 21152892A EP 4033307 A1 EP4033307 A1 EP 4033307A1
Authority
EP
European Patent Office
Prior art keywords
assembly
magnetic material
copper
entre
palladium
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.)
Pending
Application number
EP21152892.2A
Other languages
English (en)
French (fr)
Inventor
Cyril RUCHTI
Xavier BERDAT
Frédéric Kohler
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
Original Assignee
ETA SA Manufacture Horlogere Suisse
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 ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to EP21152892.2A priority Critical patent/EP4033307A1/de
Priority to US17/646,317 priority patent/US20220235438A1/en
Priority to JP2022001390A priority patent/JP2022113124A/ja
Priority to KR1020220006057A priority patent/KR20220106692A/ko
Priority to CN202210066173.8A priority patent/CN114815566A/zh
Publication of EP4033307A1 publication Critical patent/EP4033307A1/de
Priority to JP2023137273A priority patent/JP2023153390A/ja
Pending legal-status Critical Current

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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
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
    • C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/10—Alloys based on aluminium with zinc as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent
    • C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C5/00—Alloys based on noble metals
    • C22C5/04—Alloys based on a platinum group metal
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C5/00—Alloys based on noble metals
    • C22C5/06—Alloys based on silver
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C5/00—Alloys based on noble metals
    • C22C5/06—Alloys based on silver
    • C22C5/08—Alloys based on silver with copper as the next major constituent
    • 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
    • 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
    • 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
    • G04B31/0082—Jewel 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
    • G04B31/06—Manufacture or mounting processes
    • 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
    • G04B31/08—Lubrication
    • 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
    • G04B43/007—Antimagnetic alloys

Definitions

  • the invention relates to an assembly comprising a rotating mobile fitted with a pivot made of non-magnetic material and a bearing fitted with a cone, in particular for a timepiece.
  • the invention also relates to a timepiece comprising such an assembly.
  • revolving mobiles such as pendulums
  • pendulums generally comprise two pivots, the ends of which are inserted into stones in order to be able to rotate.
  • stones of the ruby or sapphire type are used to form counter-pivots or guide elements called bearings.
  • the bearings can also be metallic. These counter-pivots and guide elements are intended to come into contact with the pivots in order to make the latter mobile in rotation and this, with minimal friction. Thus, they form, for example, all or part of a bearing of the mobile shaft mounted in rotation.
  • synthetic stones are used in watch movements.
  • the Verneuil-type process is known for manufacturing stones of the monocrystalline type.
  • stones of the polycrystalline type which are manufactured by pressing a precursor with a view to obtaining a green body of the future stone from a pressing tool.
  • the stones serving as a rotation guide element of a pivot generally have a through hole in which the pivot is inserted to rest on a counter-pivot. It is known to form a substantially hemispherical hollow around the hole on the pivot insertion face to facilitate insertion of the pivot. In addition, it allows the pivot to be put back in place in the event that it comes out due to a shock.
  • the hollow is, for example, obtained by turning with a diamond chisel.
  • the figure 1 is an example of the prior art, of an assembly 1 comprising a stone 2 provided with a hole 3 and a hemispherical hollow 4 forming the entrance to the hole 3.
  • the assembly 1 further comprises a pivot 7 configured to be inserted into the hole 3 to allow the rotation of a movable element, not shown in the figure.
  • magnetism is a major problem for watch movements, because it affects the precision of the movements.
  • it is also known to use non-magnetic materials to form certain parts of the movement.
  • these non-magnetic materials make it possible to produce rotating mobile shafts, which avoid magnetization of the pivot.
  • non-magnetic materials are often less hard than the magnetic metals usually used for rotating spindles.
  • a protruding edge is present at the edge of the hole, so that a pivot made of a soft non-magnetic material can be damaged by said edge, when the pivot comes out of the hole and enters it again, by example under the effect of a shock. After several shocks of this type, the pivot quickly undergoes premature wear, which will have repercussions on the precision of the movement thereafter.
  • the object of the present invention is to overcome all or part of the drawbacks mentioned above, by proposing an assembly, in particular for a timepiece, comprising a rotating wheel and a bearing, such as a stone, the rotating wheel being provided with at at least one pivot comprising at least partly a non-magnetic material, preferably entirely, the bearing comprising a face provided with a hole formed in the body of the bearing and with a functional geometry at the entrance to the hole.
  • the assembly is remarkable in that the functional geometry has a cone shape, and in that the non-magnetic material of the pivot comprises an alloy to be chosen from materials based on copper, materials based on palladium or aluminum materials.
  • this assembly it is possible to use soft non-magnetic materials for the pivots of rotating mobiles, because the conical entry of the hole avoids the risk of premature wear of the pivot in the event of shocks. Indeed, the edge bordering the hole and the cone is much less prominent, so that the pivot will not be damaged if it leaves the hole and re-enters it following a shock.
  • materials such as copper-based, palladium-based or aluminum-based alloys are particularly well suited for this use.
  • the non-magnetic material has a Vickers hardness of less than 500 HV, preferably less than 450 HV, or even less than 400 HV.
  • the non-magnetic material is a copper-based alloy of the CuBe2 type.
  • the non-magnetic material is an alloy comprising by weight: between 30% and 40% palladium, between 25% and 35% silver, between 10% and 18% copper, between 0.5% and 1.5% zinc, and the alloy comprises gold and platinum by weight with a total percentage of these two elements between 16% and 24%.
  • the non-magnetic material is an alloy comprising by weight between 38% and 43% palladium, between 35% and 40% silver, between 18% and 23% copper, and between 0.5% and 1.5% zinc.
  • the stone comprises alumina Al 2 O 3 or zirconia ZrO 2 .
  • the stone comprises an upper face and a lower face, the lower face comprising the cone.
  • the hole is through so as to connect said cone to the upper face of said stone.
  • the invention also relates to a timepiece comprising such an assembly.
  • the invention relates to an assembly comprising a rotating wheel set and a bearing, such as a stone, in particular for a timepiece.
  • the stone is intended to come into contact with a pivot of the rotating mobile, in order to make the latter mobile in rotation with minimal friction.
  • such an assembly cannot be limited to the watchmaking field and can be applied to any mounted part that is mobile relative to a bearing.
  • the stone is preferably formed from alumina or zirconia, with a crystallographic structure of monocrystalline or polycrystalline type.
  • the stone forms, for example, a guide element intended to be mounted in a damping bearing of a timepiece.
  • the stone 20 of the assembly 10 is traversed by a hole 8 intended to receive a pivot 17, also called pin.
  • the stone 20 comprises an upper face 5 and a lower face 6, one of which comprises a cone 12 communicating with the through hole 8.
  • the hole 8 communicates with the upper face 5 and also with a substantially conical recess defined in the underside 6. This recess then forms an engagement cone for the pierced stone 20.
  • the cone 12 preferably has rotational symmetry.
  • Cone 12 has a first opening 19 at its base and a second opening at its top. The first opening 19 is larger than the second, and is formed in the lower face 6 of the stone 20.
  • the connection of the cone 12 and the hole 8 is carried out by the second opening to form an edge 15.
  • the widening of the cone 12 makes it possible to easily insert the pivot 17 of the shaft 16 of a rotating part, in particular in the event of an impact.
  • the angle of the cone is chosen to prevent the edge 15 formed by the top of the cone and the hole 8 from projecting too much. For example, an angle of between 30° and 120°, preferably between 45° and 90°, is chosen.
  • an internal wall of the body of this stone 20 defined at the level of the hole 8 comprises a rounded zone intended to minimize contact with the pivot but also to facilitate possible lubrication.
  • the upper face 5 of the stone comprises a rim 18, in particular to enclose laterally a counter-pivot in the case of a landing.
  • the rim 18 is preferably peripheral, that is to say it delimits the edge of the upper face 5 of the stone 20.
  • it defines an internal zone 9 of the upper face 5 comprising a face of support 11 and the outlet of the through hole 8, and a concentrically convex zone 9 from the support face 11 to the hole 8.
  • An upper face 5 with such a rim 18 makes it possible, for example, to block laterally an element arranged on the upper face of the stone 20.
  • a counter-pivot stone can be arranged so that it is blocked laterally by the internal side of the rim 18 while resting on the bearing face 11.
  • the counter-pivot stone is sized to correspond to the zone 9 of stone 10.
  • the stone thus forms an axial and radial support for a counter-pivot.
  • the counter-pivot not shown in the figures, can be fitted into stone 10 to support it axially and hold it laterally.
  • the stone 10 has a partially flared peripheral face 13 connecting the lower face 6 of smaller surface to the upper face 5 of larger surface.
  • the picture 3 shows an alternative embodiment of a stone 30 of a set.
  • the stone 30 has a different shape, the upper face 25 being curved and the lower face 26 being substantially planar. This stone 30 does not include an edge, and must be inserted into a specific ring (or bezel).
  • the through hole 28 and the cone 22 are similar to those of the figure 2 .
  • the rotating mobile is provided with a pivot comprising at least partly a non-magnetic material, preferably entirely.
  • the non-magnetic material makes it possible to limit the sensitivity of the pivot to magnetic fields.
  • the non-magnetic material of the pivot comprises a metal alloy to be chosen from materials based on copper, based on palladium, or materials based on aluminium.
  • the non-magnetic material included in the pivot is soft, that is to say it has a Vickers hardness of less than 500 HV, preferably less than 450 HV, or even less than 400 HV or 350HV.
  • the non-magnetic material is a “soft” material compared to the harder metallic materials used to form the pivots of the usual rotary mobiles.
  • the non-magnetic material comprises an alloy of copper and beryllium, of the CuBe2 type.
  • the pivot is formed substantially entirely from this alloy of copper and beryllium.
  • the alloy generally comprises at least 90% copper, even at least 95% copper, and even up to 98% copper, which is supplemented by beryllium.
  • the non-magnetic material is an alloy made up by weight of 35% palladium, 30% silver, 14% copper, 10% gold, 10% platinum and 1% zinc.
  • the non-magnetic material is an alloy comprising 41% palladium, 37.5% silver, 20% copper, 1% zinc and 0.5% platinum.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Adornments (AREA)
  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
  • Braking Arrangements (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
EP21152892.2A 2021-01-22 2021-01-22 Baugruppe mit einem rotierenden beweglichen körper aus nichtmagnetischem material und einer mit einem konus versehenen lagerbuchse Pending EP4033307A1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP21152892.2A EP4033307A1 (de) 2021-01-22 2021-01-22 Baugruppe mit einem rotierenden beweglichen körper aus nichtmagnetischem material und einer mit einem konus versehenen lagerbuchse
US17/646,317 US20220235438A1 (en) 2021-01-22 2021-12-29 Assembly comprising a rotary wheel made of a non-magnetic material and a bearing provided with a cone
JP2022001390A JP2022113124A (ja) 2021-01-22 2022-01-07 非磁性材料によって作られた回転車及び部分円錐面があるベアリングを備えるアセンブリー
KR1020220006057A KR20220106692A (ko) 2021-01-22 2022-01-14 비자성 재료의 로터리 휠 및 원뿔이 구비된 베어링을 포함하는 조립체
CN202210066173.8A CN114815566A (zh) 2021-01-22 2022-01-20 包括非磁性材料制成的旋转轮和设有锥形部的轴承的组件
JP2023137273A JP2023153390A (ja) 2021-01-22 2023-08-25 非磁性材料によって作られた回転車及び部分円錐面があるベアリングを備えるアセンブリー

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21152892.2A EP4033307A1 (de) 2021-01-22 2021-01-22 Baugruppe mit einem rotierenden beweglichen körper aus nichtmagnetischem material und einer mit einem konus versehenen lagerbuchse

Publications (1)

Publication Number Publication Date
EP4033307A1 true EP4033307A1 (de) 2022-07-27

Family

ID=74205714

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21152892.2A Pending EP4033307A1 (de) 2021-01-22 2021-01-22 Baugruppe mit einem rotierenden beweglichen körper aus nichtmagnetischem material und einer mit einem konus versehenen lagerbuchse

Country Status (5)

Country Link
US (1) US20220235438A1 (de)
EP (1) EP4033307A1 (de)
JP (2) JP2022113124A (de)
KR (1) KR20220106692A (de)
CN (1) CN114815566A (de)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB655161A (en) * 1946-10-19 1951-07-11 Linde Air Prod Co Improvements in the pivotal mountings of machine or instrument parts
GB867211A (en) * 1957-04-30 1961-05-03 Straumann Inst Ag Parts of clock and watch movements
FR1314364A (fr) * 1960-06-15 1963-01-11 Nouvelle combinaison d'aimants pour suspension d'axe conjointement avec l'entretien d'un mouvement d'horlogerie électrique
CH712762A2 (fr) * 2016-07-19 2018-01-31 Nivarox Far Sa Axe de pivotement pour mouvement d'horlogerie.
CH714370A2 (fr) * 2017-11-27 2019-05-31 Montres Breguet Sa Dispositif de centrage magnétique d'un arbre dans un mouvement horloger.
WO2019145434A1 (fr) * 2018-01-26 2019-08-01 Richemont International Sa Axe de pivotement d'un organe reglant
EP3594756A1 (de) * 2018-07-10 2020-01-15 Blancpain SA Uhrwerkskomponente mit wellenteil aus nichtmagnetischer legierung
CH715679A2 (fr) * 2018-12-20 2020-06-30 Swatch Group Res & Dev Ltd Palier, notamment amortisseur de choc, et mobile tournant d'un mouvement horloger.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3273307A1 (de) * 2016-07-19 2018-01-24 Nivarox-FAR S.A. Bauteil für uhrwerk
EP3273306A1 (de) * 2016-07-19 2018-01-24 Nivarox-FAR S.A. Bauteil für uhrwerk
CH714323A2 (fr) * 2017-11-13 2019-05-15 Comadur Sa Procédé de fabrication d'une pierre percée.

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB655161A (en) * 1946-10-19 1951-07-11 Linde Air Prod Co Improvements in the pivotal mountings of machine or instrument parts
GB867211A (en) * 1957-04-30 1961-05-03 Straumann Inst Ag Parts of clock and watch movements
FR1314364A (fr) * 1960-06-15 1963-01-11 Nouvelle combinaison d'aimants pour suspension d'axe conjointement avec l'entretien d'un mouvement d'horlogerie électrique
CH712762A2 (fr) * 2016-07-19 2018-01-31 Nivarox Far Sa Axe de pivotement pour mouvement d'horlogerie.
CH714370A2 (fr) * 2017-11-27 2019-05-31 Montres Breguet Sa Dispositif de centrage magnétique d'un arbre dans un mouvement horloger.
WO2019145434A1 (fr) * 2018-01-26 2019-08-01 Richemont International Sa Axe de pivotement d'un organe reglant
EP3594756A1 (de) * 2018-07-10 2020-01-15 Blancpain SA Uhrwerkskomponente mit wellenteil aus nichtmagnetischer legierung
CH715679A2 (fr) * 2018-12-20 2020-06-30 Swatch Group Res & Dev Ltd Palier, notamment amortisseur de choc, et mobile tournant d'un mouvement horloger.

Also Published As

Publication number Publication date
KR20220106692A (ko) 2022-07-29
US20220235438A1 (en) 2022-07-28
JP2023153390A (ja) 2023-10-17
JP2022113124A (ja) 2022-08-03
CN114815566A (zh) 2022-07-29

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