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EP2326995B1 - Getriebesystem für uhrwerk - Google Patents

Getriebesystem für uhrwerk Download PDF

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Publication number
EP2326995B1
EP2326995B1 EP09806405.8A EP09806405A EP2326995B1 EP 2326995 B1 EP2326995 B1 EP 2326995B1 EP 09806405 A EP09806405 A EP 09806405A EP 2326995 B1 EP2326995 B1 EP 2326995B1
Authority
EP
European Patent Office
Prior art keywords
pattern
pinion
mask
substrate
wheel
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
EP09806405.8A
Other languages
English (en)
French (fr)
Other versions
EP2326995A1 (de
Inventor
Marco Verardo
Thierry Conus
Jean-Philippe Thiébaud
Jean-Bernard Peters
Pierre Cusin
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 EP09806405.8A priority Critical patent/EP2326995B1/de
Publication of EP2326995A1 publication Critical patent/EP2326995A1/de
Application granted granted Critical
Publication of EP2326995B1 publication Critical patent/EP2326995B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/0069—Watchmakers' or watch-repairers' machines or tools for working materials for working with non-mechanical means, e.g. chemical, electrochemical, metallising, vapourising; with electron beams, laser beams
    • 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
    • G04B13/026—

Definitions

  • the invention relates to a composite gear system, for example silicon - metal for a timepiece and more particularly to such a system comprising a fastening device able to avoid shear forces.
  • a composite watchmaking organ that is to say comprising two types of materials, such as a sprocket gear type gear system if one of the materials comprises a very restricted plastic zone.
  • a sprocket gear type gear system if one of the materials comprises a very restricted plastic zone.
  • crystalline silicon, crystalline alumina or crystalline silica it is difficult to attach to a polygonal axis without breaking it.
  • the document EP 1705533 discloses an assembly of a workpiece on an axis and the document EP 0732635 a method of manufacturing a micromechanical part.
  • the object of the present invention is to overcome all or part of the disadvantages mentioned above by proposing a gear system comprising a fastening device to avoid the efforts of shear while being able to adapt to a cylindrical axis with circular section.
  • the invention relates to a gear system comprising a pinion and a toothed wheel mounted coaxially with respect to a pivoting axis, characterized in that it comprises a device for fastening between said pinion and said wheel in order to avoid the relative displacement of one with respect to the other.
  • the invention also relates to a timepiece characterized in that it comprises a gear system according to one of the preceding variants.
  • the invention relates to a generally annotated gear system 1. It comprises an axis 3, a pinion 5 and a toothed wheel 7.
  • the pinion 5 and the wheel 7 are intended to be mounted coaxially on the same axis 3.
  • Such a gear system 1 may, for example, be applied to an escape wheel or a transmission mobile.
  • the invention can be applied to other watchmaking or non-watchmaking organs.
  • the axis 3 is substantially cylindrical circular section, that is to say symmetrically ideal to be mounted between two bearings (not shown) in the usual manner as explained above.
  • the pinion 5 comprises a main body of cylindrical shape whose section of the inner diameter substantially corresponds to the outer diameter of the axis 3.
  • the pinion 5 comprises wings 9 extending radially from said main body in order to cooperate with another toothed member (not shown).
  • the pinion 5 has about twenty wings 9, however, according to the application of the gear system 1, the number may be lower or higher.
  • the wheel 7 comprises a serge 11, a hub 13 pierced with a polygonal or cylindrical pinhole 15 and four arms 17 connecting said hub and said serge.
  • the serge 11 has a peripheral toothing 19 extending radially from said serge to cooperate with another toothed member (not shown).
  • the number of arms 17 which connects the serge 11 and the hub 13 may be lower or higher depending on the application.
  • the hub 13 preferably comprises an attachment device 21 intended to prevent the relative displacement of the wheel 7 relative to the pinion 5 in order to reduce the shear forces.
  • the attachment device 21 mainly comprises a cavity 23 formed at the hub 13 and intended to cooperate with the lower part of the pinion 5 by partial overlap.
  • the cavity 23 is hollowed out in the hub 13.
  • the cavity 23 has a shape at least partially corresponding to the section at the bottom of the pinion 5, that is to say a ring comprising a toothing intended for receiving by nesting at least a portion of the wings 9 and the main body of the pinion 5 over part of its height. It is therefore understood that when the lower part of the pinion 5 is slid into the cavity 23, the assembly limits the angular deflections between the pinion 5 and the wheel 7 thus making it possible to avoid the shear forces.
  • the impression 23 has a shape exactly corresponding to the section of the pinion 5.
  • the footprint 23 could comprise fewer teeth than the wings 9 of the pinion 5 while still allowing to avoid the shear forces .
  • Such a footprint could for example consist of a toothing having half the teeth than the pinion 5 has wings 9.
  • the gear system 1 is of the composite type, that is to say that it is formed by at least two types of materials.
  • one of the members is, preferably, formed of a micro-machinable material and the others of metal materials.
  • a micro-machinable material is used in order to benefit from sub-micron fabrication accuracy.
  • Such a material may comprise crystalline silicon, crystalline alumina or crystalline silica.
  • the other organs are preferably metal materials, when they did not need to have more accurate dimensions than is possible with said metal materials.
  • the wheel 7 is preferably formed from a micro-machinable material while the axis 3 and the pinion 5 are made from a metallic material such as, for example, steel or brass.
  • a configuration may in particular be useful for an application of the exhaust wheel type to obtain a set of impulse teeth 19 but also a 23 very precise fingerprint. Indeed, as visible at the figure 7 the wheel 7 has an intermediate engraving depth for the impression 23 and a total engraving for the rest of the organ.
  • the fastening device 21 further comprises an adhesive material mounted between the cavity 23 and the pinion 5 in order to improve the fastening force.
  • a material may be, for example, a solder or an adhesive.
  • the bond using an adherent material is generally performing in traction but poor performance in shear. It is therefore understood that by the configuration of the fastening device 21, the fastening force thus benefits from the tensile advantages of the adhering material and the shearing advantages of the partial overlap by the impression 23.
  • the adhering material may be, for example, mounted between the bottom of the cavity 23 and the underside of the pinion 5.
  • the adhering material may just as well be mounted between the periphery of the wings 9 and the toothing of the cavity 23. last configuration is particularly interesting when the footprint 23 is not exactly corresponding to the section of the pinion 5 as explained above.
  • the manufacturing process of the multi-level micro-machining material member will now be explained using the Figures 1 to 6 .
  • the member made of micro-machinable material is a gear wheel 7.
  • the hub 13 is shown in section.
  • other cavities are made outlets to delimit the hub 13, the arms 17, the serge 11 and its toothing 19.
  • a substrate 31 of micro-machinable material such as, preferably, crystalline silicon, crystalline alumina or crystalline silica is provided.
  • This step may comprise a phase of mechanical and / or chemical grounding of the substrate 31 in order to adapt the thickness eT of the substrate 31 to that of the final member that is to say the wheel 7.
  • a first protective mask 33 is formed on the top of the substrate 31.
  • Such a step can be carried out by performing, for example, a selective oxidation on the surface of the substrate 31 in order to increase the oxide of silicon to form said mask to a predetermined height.
  • the mask 33 represents the pattern 32 of the cavity 23 to be etched on a portion e 2 of the thickness of the substrate 31.
  • a second protective mask 35 is structured in overlap with that made in the second step.
  • Such a step can be carried out by carrying out a photolithography of a photosensitive resin.
  • a photoresist is deposited on the substrate 31 and the protective mask 33.
  • the resin is selectively exposed with radiation through a partially opaque mask.
  • the selectively illuminated photosensitive resin is developed so as to leave only a protective mask 35, as visible in FIG. figure 3 which represents the pattern 34 of the pinhole 15 and the other opening cavities of the wheel 7 to be etched in the thickness of the substrate 31.
  • the second mask 35 by selective oxidation on the surface of the substrate 31 for the purpose of growing silicon oxide to form said mask to a predetermined height.
  • anisotropic etching is carried out on the substrate 31 according to the pattern 34 of the second protective mask 35.
  • the attack may be of the dry or wet type.
  • a method of the deep reactive ion etching type (better known by the abbreviation "DRIE” from the terms “Deep Reactive Ion Etching") will be used.
  • DRIE deep reactive ion etching type
  • the attack makes it possible to begin the etching of the axis hole 15 but also of the other emerging cavities of the wheel 7.
  • the substrate 31 is etched according to the pattern 34 on a part e 1 of its thickness e T.
  • the second mask 35 is removed. Depending on the nature of the second mask 35, this may consist in respectively removing the structured resin or etching the silicon oxide layer until the pattern 32 is discovered.
  • a second anisotropic etching is carried out on the substrate 31 according to the pattern 32 of the first protection mask 33.
  • the etching can also be of the dry or wet type.
  • the second attack makes it possible to continue the etching of the axis hole 15 but also of the other opening cavities of the wheel 7 and to start the etching of the impression 23.
  • the substrate 31 is etched throughout its thickness and in the pattern 34 and on a part e 2 of its thickness according to the pattern 32.
  • the section of the pattern 34 of the second mask 35 is smaller than that of the pattern 32 of the first mask 33. This makes it possible to engrave the pattern 34 alone and then etch the patterns 34 and 32 together. In a seventh and last time, the finished wheel 7 is released from the substrate 31.
  • the pinion 5-pin 3 assembly is mounted on the watchmaking member 7 made according to the manufacturing method explained above, in the example a toothed wheel, in order to form the composite gear system 1
  • the pinion 5-pin 3 assembly is brought closer to the member 7 so that the lower end of the pin 3 is opposite the pin hole 15 of the pin. wheel 7 as shown in the figure 7 .
  • the axis 3 slides through the pinhole 15 to friction as shown in FIG. figure 8 until, in a third phase, the bottom of the pinion 5 engages in the cavity 23 hollowed out in the hub 13 of the wheel 7.
  • an adhesive material can be used to improve the fastening force between the pinion 5 and the wheel 7.
  • two additional phases could be realized.
  • An intermediate phase between the second and third phases of the final assembly process could it consists in depositing said material in the bottom of the impression 23.
  • Such a material could be a solder and / or an adhesive such as a polymer adhesive.
  • a final phase could then follow the third phase and would activate the adherent material such as, for example, by melting said solder and / or by polymerizing said adhesive.
  • the first could consist in depositing said material between the teeth of the cavity 23 and the wings 9 of the pinion 5.
  • a material could also be a solder and / or an adhesive such as a polymer adhesive.
  • the second final phase could then enable the adhering material to be activated, for example by melting said solder and / or by polymerizing said adhesive.
  • a composite gear system 1 of the sprocket gear type that can be integrated in a timepiece and that comprises a wheel 7 made of micro-machinable material whose serge 11 has a toothing 19 and whose hub 13 is bonded, advantageously , to the axis 3 - pinion 5 assembly by means of the fastening device 21.
  • the recess 23 may be at least partially projecting from the hub 13. In fact, this would allow the increase of the contact zone between the axis 3 and the hub 13, which would allow the improvement of the guiding of the wheel 7 with respect to the axis 3. Said contact zone could even correspond to the total height of the wheel 7, the footprint 23 would then be entirely projecting from the hub 13 of the wheel 7 instead of being at least partially hollow.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Manufacturing & Machinery (AREA)
  • Metallurgy (AREA)
  • Gears, Cams (AREA)
  • Micromachines (AREA)
  • Weting (AREA)

Claims (16)

  1. Getriebesystem (1), das ein Ritzel (5) und ein Zahnrad (7), die in Bezug auf eine Drehwelle (3) koaxial montiert sind, und eine Befestigungsvorrichtung (21) zwischen dem Ritzel und dem Rad, um eine relative Verlagerung zwischen ihnen zu vermeiden, umfasst, dadurch gekennzeichnet, dass die Befestigungsvorrichtung (21) einen Hohlraum (23) aufweist, dessen Form wenigstens teilweise dem Querschnitt des Ritzels entspricht und der in der Nabe (13) des Rades ausgebildet ist, um sie drehfest zu verbinden.
  2. System (1) nach Anspruch 1, dadurch gekennzeichnet, dass der Hohlraum (23) in einem Teil mit einer Dicke (e2) der Nabe verwirklicht ist, um jegliche relative Verlagerung durch teilweises Umgeben des Ritzels (5) zu blockieren.
  3. System (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Welle (3) im Wesentlichen zylindrisch mit kreisförmigem Querschnitt ist.
  4. System (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Welle (3) und das Ritzel (5) aus einem metallischen Material verwirklicht sind.
  5. System (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Ritzel (5) einteilig mit der Welle (3) hergestellt ist.
  6. System (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Zahnrad (7) aus einem mikrobearbeitbaren Material verwirklicht ist.
  7. System (1) nach Anspruch 6, dadurch gekennzeichnet, dass das mikrobearbeitbare Material aus der Gruppe gewählt ist, die kristallines Silicium, kristallines Aluminiumoxid und kristallines Siliciumoxid enthält.
  8. System (1) nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Befestigungsvorrichtung (21) außerdem ein Haftmaterial enthält, das zwischen dem Rad (7) und dem Ritzel (5) montiert ist, um die Befestigungskraft der Vorrichtung zu verbessern.
  9. Zeitmessgerät, dadurch gekennzeichnet, dass es ein Getriebesystem (1) nach einem der vorhergehenden Ansprüche enthält.
  10. Verfahren zum Herstellen eines Getriebe-Uhrenorgans (7) aus einem mikrobearbeitbaren Material mit mehreren Ebenen, das eine Befestigungsvorrichtung umfasst, die gemäß den folgenden Schritten hergestellt wird:
    a) Bereitstellen eines Substrats (31) aus einem mikrobearbeitbaren Material;
    b) Strukturieren der Oberfläche des Substrats mit einer Maske (33), die ein erstes Muster (32) enthält;
    dadurch gekennzeichnet, dass es die folgenden Schritte umfasst:
    c) Strukturieren einer zweiten Maske (35), die ein zweites Muster (34) aufweist, das kleiner als das erste Muster (32) der ersten Maske ist, auf der Oberfläche des Substrats und der ersten Maske (33);
    d) Verwirklichen einer anisotropen Ätzung, um längs des zweiten Musters (34) über eine erste Dicke (e1) des Substrats (31) zu ätzen;
    e) Abnehmen der zweiten Maske (35);
    f) Verwirklichen einer zweiten anisotropen Ätzung, um die Ätzung längs des zweiten Musters (34) fortzuführen, und Beginnen der Ätzung längs des ersten Musters (32) über eine zweite Dicke (e2) des Substrats (31);
    g) Abnehmen der ersten Maske (33);
    h) Abnehmen des Getriebe-Uhrenorgans (7) von dem Substrat (31).
  11. Verfahren nach Anspruch 10, dadurch gekennzeichnet, dass das zweite Muster (34) über die gesamte Dicke (eT) des Substrats (31) geätzt wird.
  12. Verfahren nach Anspruch 11, dadurch gekennzeichnet, dass das zweite Muster (34) die Form eines Zahnrades (7) hat, dessen Nabe (13) ein Wellenloch (15) aufweist.
  13. Verfahren nach einem der Ansprüche 10 bis 12, dadurch gekennzeichnet, dass das erste Muster (32) die Form eines gezahnten Rings (23) hat und über die Dicke (e2) des Substrats (31) teilweise geätzt ist.
  14. Verfahren nach einem der Ansprüche 10 bis 13, dadurch gekennzeichnet, dass die erste Maske (33) aus Siliciumoxid verwirklicht ist und dass die zweite Maske (35) aus einem lichtempfindlichen Harz verwirklicht ist.
  15. Verfahren nach einem der Ansprüche 10 bis 13, dadurch gekennzeichnet, dass die erste Maske (33) und die zweite Maske (35) aus Siliciumoxid verwirklicht sind.
  16. Verfahren nach einem der Ansprüche 10 bis 15, dadurch gekennzeichnet, dass mehrere Organe (7) auf demselben Substrat (31) hergestellt werden.
EP09806405.8A 2008-08-15 2009-07-23 Getriebesystem für uhrwerk Active EP2326995B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09806405.8A EP2326995B1 (de) 2008-08-15 2009-07-23 Getriebesystem für uhrwerk

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP08162475A EP2154582A1 (de) 2008-08-15 2008-08-15 Verzahnungverfahren für Uhrwerk
EP09806405.8A EP2326995B1 (de) 2008-08-15 2009-07-23 Getriebesystem für uhrwerk
PCT/EP2009/059477 WO2010018051A1 (fr) 2008-08-15 2009-07-23 Système d'engrenage pour une pièce d'horlogerie

Publications (2)

Publication Number Publication Date
EP2326995A1 EP2326995A1 (de) 2011-06-01
EP2326995B1 true EP2326995B1 (de) 2013-06-19

Family

ID=40428254

Family Applications (2)

Application Number Title Priority Date Filing Date
EP08162475A Withdrawn EP2154582A1 (de) 2008-08-15 2008-08-15 Verzahnungverfahren für Uhrwerk
EP09806405.8A Active EP2326995B1 (de) 2008-08-15 2009-07-23 Getriebesystem für uhrwerk

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP08162475A Withdrawn EP2154582A1 (de) 2008-08-15 2008-08-15 Verzahnungverfahren für Uhrwerk

Country Status (8)

Country Link
US (1) US9310770B2 (de)
EP (2) EP2154582A1 (de)
JP (1) JP5395174B2 (de)
KR (1) KR20110030692A (de)
CN (1) CN102124415B (de)
RU (1) RU2498383C2 (de)
TW (1) TWI486729B (de)
WO (1) WO2010018051A1 (de)

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JP6222725B2 (ja) * 2013-07-25 2017-11-01 セイコーインスツル株式会社 時計用歯車、脱進機構、時計用ムーブメントおよび機械式時計
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Publication number Priority date Publication date Assignee Title
EP4528389A1 (de) * 2023-09-25 2025-03-26 Casio Computer Co., Ltd. Getriebeanordnung, uhr und herstellungsverfahren für getriebeanordnung

Also Published As

Publication number Publication date
JP5395174B2 (ja) 2014-01-22
WO2010018051A1 (fr) 2010-02-18
US20110141860A1 (en) 2011-06-16
US9310770B2 (en) 2016-04-12
TW201011481A (en) 2010-03-16
EP2154582A1 (de) 2010-02-17
JP2012500386A (ja) 2012-01-05
HK1160233A1 (en) 2012-08-10
CN102124415A (zh) 2011-07-13
RU2498383C2 (ru) 2013-11-10
KR20110030692A (ko) 2011-03-23
RU2011109457A (ru) 2012-09-20
CN102124415B (zh) 2012-12-19
EP2326995A1 (de) 2011-06-01
TWI486729B (zh) 2015-06-01

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