EP2120105A1 - Verbessertes mikromechanisches Bauteil, das Schmierelemente umfasst - Google Patents

Verbessertes mikromechanisches Bauteil, das Schmierelemente umfasst Download PDF

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Publication number
EP2120105A1
EP2120105A1 EP08156100A EP08156100A EP2120105A1 EP 2120105 A1 EP2120105 A1 EP 2120105A1 EP 08156100 A EP08156100 A EP 08156100A EP 08156100 A EP08156100 A EP 08156100A EP 2120105 A1 EP2120105 A1 EP 2120105A1
Authority
EP
European Patent Office
Prior art keywords
micromechanical component
micromechanical
hydrophilic coating
lubricating
associated part
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.)
Withdrawn
Application number
EP08156100A
Other languages
English (en)
French (fr)
Inventor
Marc-André Glassey
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.)
Sigatec SA
Original Assignee
Sigatec 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 Sigatec SA filed Critical Sigatec SA
Priority to EP08156100A priority Critical patent/EP2120105A1/de
Publication of EP2120105A1 publication Critical patent/EP2120105A1/de
Withdrawn legal-status Critical Current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
    • G04B31/08—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
    • G04B15/00—Escapements
    • G04B15/14—Component parts or constructional details, e.g. construction of the lever or the escape wheel

Definitions

  • the present invention relates to the general technical field of mechanics and more particularly to the field of precision or micromechanical mechanics.
  • the invention finds its application particularly in the watch industry.
  • the present invention relates to the lubrication of a micromechanical component in relative movement with respect to an associated part. This kind of association is very widespread in watchmaking.
  • micromechanical component in relative movement with respect to an associated part, comprising a lubrication element to reduce friction during the relative movement between said associated part and said element.
  • a bearing for guiding in rotation and / or in translation the movement of a moving part with respect to said bearing, said bearing comprising a lubricating element for reducing, during the movement of the moving part, the friction on said bearing .
  • the object of the present invention is to propose a micromechanical component, of the bearing type, making it possible to overcome the limitations mentioned above, and to provide a micromechanical component whose service life is not affected by insufficient or faulty lubrication.
  • Another object of the present invention is to provide a permanently lubricated bearing, and with a precise location of the lubrication.
  • the objects of the invention are achieved by means of a micromechanical part whose lubrication element comprises a hydrophilic coating at least partially covering said element, to accumulate on and / or in said hydrophilic coating a lubricating means, realizing thus at least locally an interface permanently lubricated between the associated part and the micromechanical element, retaining the lubricating liquid in the friction zone.
  • the lubricating means may in particular be a liquid and / or a lubricating grease.
  • the hydrophilic coating extends at least partially on a support surface of the micromechanical component in contact with the associated part during relative movement.
  • the hydrophilic coating extends over the entire support surface capable of being in contact with the moving part during relative movement.
  • the micromechanical component according to the invention may also have a zone delimiting at least one lubrication means accumulation reservoir, said lubricating means being progressively conveyed from the reservoir to the lubricated interface via the hydrophilic coating.
  • the bearing according to the invention has a bearing surface defining a housing of the bore, drill, blind hole or through hole type, receiving the associated part.
  • the hydrophilic coating has for example a thickness between 0.05 microns and 3 microns and preferably between 0.2 microns and 0.8 microns.
  • the constituent material of the micromechanical part is hydrophobic.
  • the constituent material of the micromechanical component comprises, for example, crude silicon.
  • the hydrophilic coating comprises at least one layer of silicon oxide.
  • the micromechanical component is for example a bearing to guide the rotational movement and / or translation of an associated part of the genus shaft or axis.
  • micromechanical component may also constitute within the scope of the present invention and in a watch application, a serge or an escape wheel.
  • the object of the invention is also achieved by means of a watch mechanism or a timepiece comprising at least one piece micromechanical as presented above.
  • the micromechanical component 1, of the bearing type has a bore 2 in which is engaged a movable associated part 3, of the genus axis or shaft rotation.
  • the figure 3 illustrates the location of a hydrophilic coating 4, covering a support surface delimiting the bore 2.
  • the hydrophilic coating 4 thus constitutes the interface between the bore 2 and the moving part 3.
  • the hydrophilic coating 4 preferably extends over at least a portion of the support surface of the bearing, which is in contact with the associated part 3 during its relative movement with respect to the micromechanical component.
  • the hydrophilic coating 4 comprises for example at least one layer of silicon oxide.
  • the micromechanical part 1 is for example made of raw silicon or made with another hydrophobic material.
  • the micromechanical part 1 may also be made of a material covered with at least one hydrophobic deposit of the Nitride deposition type. This hydrophobic deposit is then covered, or will leave its place in the friction zone with the moving part, by the hydrophilic coating 4.
  • the level of the figure 1 also has a zone delimiting at least one reservoir 5 for accumulating means (eg liquid) for lubricating 6.
  • the lubricating means 6 is progressively conveyed and from the reservoir 5 towards the lubricated interface of the moving part by the intermediate of the hydrophilic coating 4.
  • the tank 5 is for example shaped by a countersink, chamfer, machining or other release of known material so as to contain the lubricating means 6 and maintain the lubricating means 6 in contact with the hydrophilic coating 4.
  • the bearing has a blind hole 7 for receiving an end of an axis, not shown.
  • the blind hole 7 has on the one hand a contact surface 8 guiding the axis in rotation and on the other hand a bottom 9.
  • the latter realizes the reservoir 5 intended to contain the lubricating means 6.
  • the bottom 9 for producing the tank 5 can be obtained by the engraving process "DRIE".
  • the hydrophilic coating 4 extends over the contact surface 8 and preferably extends over all or part of the inner surface of the tank 5, for example on the bottom 9.
  • a hydrophobic layer of the diamond or nitride type which has a high wear resistance.
  • micromechanical part 1 thus makes it possible, by the combination of hydrophilic and hydrophobic properties, to have a means of lubrication 6 locally where this is necessary.
  • micromechanical part 1 illustrated in Figures 4 to 7 is constitutive of teeth 10, 11, 12 hydrophobic materials, in different conformations, for example an escape wheel (Swiss lever escapement) not shown.
  • the tooth 10 thus has an end shoulder 10a on which is deposited the hydrophilic coating 4 and a drop of lubricant 6, as shown in FIG. figure 5 .
  • the teeth 11 and 12 respectively have a sloping end 11a and a substantially concave end 12a.
  • Other forms may also be contemplated without departing from the scope of the present invention.
  • the micromechanical part 1 according to the invention may also be a serge of a wheel or any other timepiece requiring lubrication.
  • the set of micromechanical parts according to the invention thus has, through a judicious combination of hydrophobic materials and hydrophilic surfaces, a more efficient lubrication.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Micromachines (AREA)
EP08156100A 2008-05-13 2008-05-13 Verbessertes mikromechanisches Bauteil, das Schmierelemente umfasst Withdrawn EP2120105A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08156100A EP2120105A1 (de) 2008-05-13 2008-05-13 Verbessertes mikromechanisches Bauteil, das Schmierelemente umfasst

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08156100A EP2120105A1 (de) 2008-05-13 2008-05-13 Verbessertes mikromechanisches Bauteil, das Schmierelemente umfasst

Publications (1)

Publication Number Publication Date
EP2120105A1 true EP2120105A1 (de) 2009-11-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08156100A Withdrawn EP2120105A1 (de) 2008-05-13 2008-05-13 Verbessertes mikromechanisches Bauteil, das Schmierelemente umfasst

Country Status (1)

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EP (1) EP2120105A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH708998A1 (fr) * 2013-12-16 2015-06-30 Tgm Développement Sa C O Etude Tissot Pièce d'horlogerie et procédé pour réduire le coefficient de frottement d'une pièce d'horlogerie.
EP2727880B1 (de) 2012-11-05 2016-06-08 GFD Gesellschaft für Diamantprodukte mbH Dreidimensionales, mikromechanisches Uhrwerksbauteil mit einer Fase und Verfahren zu dessen Herstellung
EP3109200B1 (de) * 2015-06-25 2023-06-28 Nivarox-FAR S.A. Mikromechanisches teil mit verkleinerter kontaktfläche, und sein herstellungsverfahren

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR717014A (fr) * 1930-10-18 1931-12-31 Vaw Ver Aluminium Werke Ag Procédé pour la préparation de surfaces de coussinets, glissières, guides et analogues faites en aluminium ou alliages d'aluminium
FR1283620A (fr) * 1961-03-13 1962-02-02 Palier pour pivots de montres ou analogues et appareils pourvus dudit palier
CH402742A (fr) * 1964-01-24 1965-06-15 Enicar S A Procédé de traitement des organes d'un échappement de pièce d'horlogerie, destiné à réduire les pertes d'huile, et échappement d'horlogerie obtenu par la mise en oeuvre de ce procédé
CH392396A (fr) * 1963-02-14 1965-09-30 Ebosa Sa Palier d'horlogerie pour arbre à extrémité conique
WO2008052378A2 (fr) * 2006-11-02 2008-05-08 Rolex S.A. Montre

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR717014A (fr) * 1930-10-18 1931-12-31 Vaw Ver Aluminium Werke Ag Procédé pour la préparation de surfaces de coussinets, glissières, guides et analogues faites en aluminium ou alliages d'aluminium
FR1283620A (fr) * 1961-03-13 1962-02-02 Palier pour pivots de montres ou analogues et appareils pourvus dudit palier
CH392396A (fr) * 1963-02-14 1965-09-30 Ebosa Sa Palier d'horlogerie pour arbre à extrémité conique
CH402742A (fr) * 1964-01-24 1965-06-15 Enicar S A Procédé de traitement des organes d'un échappement de pièce d'horlogerie, destiné à réduire les pertes d'huile, et échappement d'horlogerie obtenu par la mise en oeuvre de ce procédé
WO2008052378A2 (fr) * 2006-11-02 2008-05-08 Rolex S.A. Montre

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2727880B1 (de) 2012-11-05 2016-06-08 GFD Gesellschaft für Diamantprodukte mbH Dreidimensionales, mikromechanisches Uhrwerksbauteil mit einer Fase und Verfahren zu dessen Herstellung
EP2727880B2 (de) † 2012-11-05 2019-08-07 GFD Gesellschaft für Diamantprodukte mbH Dreidimensionales, mikromechanisches Bauteil mit einer Fase und Verfahren zu dessen Herstellung
CH708998A1 (fr) * 2013-12-16 2015-06-30 Tgm Développement Sa C O Etude Tissot Pièce d'horlogerie et procédé pour réduire le coefficient de frottement d'une pièce d'horlogerie.
EP3109200B1 (de) * 2015-06-25 2023-06-28 Nivarox-FAR S.A. Mikromechanisches teil mit verkleinerter kontaktfläche, und sein herstellungsverfahren

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