EP4163733B1 - Triebfeder einer uhr - Google Patents

Triebfeder einer uhr

Info

Publication number
EP4163733B1
EP4163733B1 EP21200901.3A EP21200901A EP4163733B1 EP 4163733 B1 EP4163733 B1 EP 4163733B1 EP 21200901 A EP21200901 A EP 21200901A EP 4163733 B1 EP4163733 B1 EP 4163733B1
Authority
EP
European Patent Office
Prior art keywords
arbor
clip
plate
mobile
arms
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
EP21200901.3A
Other languages
English (en)
French (fr)
Other versions
EP4163733A1 (de
Inventor
Christophe Cattin
Ivan Villar
Laurent Kaelin
Anne PHILIPPS
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 EP21200901.3A priority Critical patent/EP4163733B1/de
Publication of EP4163733A1 publication Critical patent/EP4163733A1/de
Application granted granted Critical
Publication of EP4163733B1 publication Critical patent/EP4163733B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G04B13/021—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft
    • G04B13/023—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft allowing rotational slipping when a threshold torque is exceeded

Definitions

  • Many watch movements include at least one friction wheel, particularly to allow for corrections to the time display or other functions.
  • a mechanical movement equipped with a large-medium wheel generally includes friction at the level of the minute train. Friction allows the cannon pinion to be turned, independently of the finishing train, when setting the time.
  • Assembling this type of mobile is a delicate operation that requires the arms of the board to be spread apart to allow one end of the shaft to be inserted.
  • the drive wheel is provided with two arms arranged on either side of the axis of rotation of the wheel and presenting a certain elasticity.
  • specific tooling is available to carry out the separation of the two arms, followed by a movement of the separated arms along the shaft towards their final axial position.
  • the shaft is configured to allow the assembly of the watch mobile by inserting the cylindrical mounting part, without significant deformation of the clamp, in a central zone between the arms of the clamp by orienting this cylindrical mounting part so that the minor axis of its cross-section is parallel to the opening direction of the clamp, then by a certain opening of the clamp generated by a rotation of substantially ninety degrees (90°) of the shaft relative to the board/wheel or vice versa, and finally by a terminal axial displacement of this board/wheel towards its functional axial position in which the clamp has an elastic deformation ensuring functional friction for the watch mobile.
  • said friction revolution surface defines the bottom of a circular housing arranged along the shaft for receiving the board/wheel in said functional axial position and maintaining it in this functional axial position.
  • FIGS. 1a and 1b represent an example of a typical clockwork mobile according to the state of the art, which comprises a shaft 1 and a board 2 defining a wheel (hereinafter a board), in particular a drive wheel.
  • the shaft 1 comprises a pivot 3, in the form of an elongated tube, and a pinion 4, the upper radial surface 5 of which forms an axial stop surface against which the board 2 is held.
  • the board 2 comprises two arms 6a and 6b forming a clamp which clamps a friction revolution surface 7a arranged at the bottom of a lateral housing 7 of the shaft 1.
  • the shaft 1 comprises an end portion 8, with a diameter slightly greater than the maximum diameter of the bottom of the housing 7, located beyond this housing, observed in the axial direction of the shaft 1 relative to the axial stop surface 5.
  • An assembly tool (not shown) is necessary to spread the arms 6a and 6b in elastic deformation, so that the end portion 8 can be inserted into a central area of the board between the two arms of the clamp. Then the tool is removed and the board 2 is pushed towards its final position shown in section at Figure 1b , the arms 6a and 6b then clamping the friction revolution surface 7a at the bottom of the housing 7. During this last movement, the arms 6a and 6b rub the surface of the terminal part 8 of the shaft, but as this terminal part 8 is low in height ( Figure 1b ), the negative effect of said displacement on the inner surfaces of arms 6a and 6b is negligible.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Gears, Cams (AREA)
  • Clamps And Clips (AREA)

Claims (5)

  1. Uhrwerksbaugruppe mit einem Dorn (1A), der sich in axialer Richtung der Uhrwerksbaugruppe erstreckt, und einer auf dem Dorn reibschlüssig aufgesetzten Platte (2), die ein Rad bildet, wobei der Dorn eine axiale Anschlagfläche (5) für die Platte aufweist und so ausgestaltet ist, dass er die Platte, nach dem Aufsetzen, in einer im Wesentlichen funktionsgerechten axialen Position halten kann, in der sie an der axialen Anschlagfläche anliegt, wobei die Platte (2) mindestens einen ersten Arm (6a) und mindestens einen zweiten Arm (6b) umfasst, die gemeinsam eine Klammer bilden, die so ausgelegt ist, dass sie durch elastische Verformung mindestens eines ihrer Arme in Öffnungsrichtung der Klammer eine vom Dorn im Bereich der axialen Anschlagfläche bereitgestellte Reibfläche (7a) erfassen kann;
    wobei die Uhrwerksbaugruppe derart ausgestaltet ist, dass der Dorn (1A) ein zylindrisches Passteil (10) aufweist, das in axialer Richtung jenseits der Reibfläche (7a) relativ zur axialen Anschlagfläche (5) angeordnet ist, wobei das zylindrische Passteil (10) einen langgestreckten Querschnitt mit einer Hauptachse (A) in Längsrichtung dieses Querschnitts und einer Nebenachse (B) senkrecht zur Hauptachse aufweist, deren Abmessungen sowohl kleiner als die der Hauptachse als auch kleiner als der Mindestdurchmesser der Reibfläche sind, wobei der Dorn so konfiguriert ist, dass die Montage der Uhrwerksbaugruppe dadurch erfolgt, dass das zylindrische Passteil ohne nennenswerte Verformung der Klammer in eine zentrale Zone zwischen den Armen (6a, 6b) der Klammer eingeführt wird, wobei das Passteil so ausgerichtet ist, dass die Nebenachse seines Querschnitts parallel zur Öffnungsrichtung der Klammer verläuft, anschließend die Klammer durch eine im Wesentlichen um neunzig Grad (90°) erfolgende Drehung des Dorns (1A) relativ zur Platte (2) geöffnet wird und abschließend die Platte (2) axial in ihre funktionale Position bewegt wird, in der die Klammer elastisch verformt ist und eine funktionale Reibverbindung für die Uhrwerksbaugruppe herstellt.
  2. Uhrwerksbaugruppe nach Anspruch 1, bei der die Reibdrehfläche (7a) die Rückseite eines kreisförmigen Lagers (7) bildet, das entlang des Dorns angeordnet ist, um die Platte (2) in ihrer funktionalen axialen Position zu halten und dort zu sichern.
  3. Uhrwerksbaugruppe nach Anspruch 1 oder 2, bei der der Dorn in Richtung der Nebenachse seines Querschnitts zwei einander gegenüberliegende Rampen (14) zwischen dem zylindrischen Passteil (10) und der Reibdrehfläche (7a) ausbildet.
  4. Uhrwerksbaugruppe nach einem der vorhergehenden Ansprüche, bei der der Dorn (1A) mit einem Ritzel (4) versehen ist und die axiale Anschlagfläche (5) durch eine der Stirnflächen des Ritzels gebildet ist.
  5. Verfahren zum Zusammenbau einer Uhrwerksbaugruppe nach einem der vorhergehenden Ansprüche, umfassend die folgenden Schritte:
    - Bereitstellen der Platte (2) mit mindestens zwei Armen (6a, 6b), die gemeinsam einen Clip bilden, sowie des Dorns (1A) mit dem zylindrischen Passteil (10);
    - Ausrichten des Dorns relativ zur Platte, sodass die Nebenachse des Querschnitts des zylindrischen Passteils parallel zur Öffnungsrichtung des Clips verläuft, und - unter weitgehender Beibehaltung dieser Ausrichtung - axiales Einführen des zylindrischen Passteils (10) in den zentralen Bereich zwischen den Cliparmen, bis sich die Platte im Wesentlichen an einem Ende des Passteils auf der Seite der Reibdrehfläche befindet;
    - anschließend Drehen des Dorns (1A) relativ zur Platte (2), um eine elastische Spreizung der Cliparme (6a, 6b) herbeizuführen und dadurch den Clip in Öffnungsrichtung zu öffnen; und
    - schließlich axiales Verschieben der Platte (2), bis sie ihre funktionale axiale Position erreicht, in der der Clip die Reibdrehfläche formschlüssig greift.
EP21200901.3A 2021-10-05 2021-10-05 Triebfeder einer uhr Active EP4163733B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21200901.3A EP4163733B1 (de) 2021-10-05 2021-10-05 Triebfeder einer uhr

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21200901.3A EP4163733B1 (de) 2021-10-05 2021-10-05 Triebfeder einer uhr

Publications (2)

Publication Number Publication Date
EP4163733A1 EP4163733A1 (de) 2023-04-12
EP4163733B1 true EP4163733B1 (de) 2025-07-23

Family

ID=78078100

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21200901.3A Active EP4163733B1 (de) 2021-10-05 2021-10-05 Triebfeder einer uhr

Country Status (1)

Country Link
EP (1) EP4163733B1 (de)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006234437A (ja) * 2005-02-22 2006-09-07 Seiko Instruments Inc 歯車構造体及びこれを備えた時計
CN107533319B (zh) * 2015-03-11 2020-02-21 西铁城时计株式会社 钟表的动力传导体及钟表的动力传导体的制造方法
CH714000A1 (fr) * 2017-07-18 2019-01-31 Richemont Int Sa Ensemble horloger comprenant un composant horloger fixé sur un axe.

Also Published As

Publication number Publication date
EP4163733A1 (de) 2023-04-12

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