EP4280002A1 - Chronographenmodul mit einem abnehmbaren rad - Google Patents

Chronographenmodul mit einem abnehmbaren rad Download PDF

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Publication number
EP4280002A1
EP4280002A1 EP22173862.8A EP22173862A EP4280002A1 EP 4280002 A1 EP4280002 A1 EP 4280002A1 EP 22173862 A EP22173862 A EP 22173862A EP 4280002 A1 EP4280002 A1 EP 4280002A1
Authority
EP
European Patent Office
Prior art keywords
shaft
chronograph
wheel
chronograph module
primary
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
EP22173862.8A
Other languages
English (en)
French (fr)
Inventor
Jean-Philippe Rochat
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.)
Montres Breguet SA
Original Assignee
Montres Breguet 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 Montres Breguet SA filed Critical Montres Breguet SA
Priority to EP22173862.8A priority Critical patent/EP4280002A1/de
Priority to JP2023077637A priority patent/JP2023169876A/ja
Priority to CN202310559137.XA priority patent/CN117075456A/zh
Publication of EP4280002A1 publication Critical patent/EP4280002A1/de
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
    • G04F7/0866—Special arrangements
    • G04F7/0885—Modular constructions involving interchangeability with one or more chronograph modules on a single base movement
    • 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
    • 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
    • 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
    • G04B13/025—Wheels; Pinions; Spindles; Pivots with elastic means between the toothing and the hub of a toothed wheel

Definitions

  • the invention relates to a chronograph module provided with a removable wheel.
  • the invention also relates to a watch movement comprising at least one such chronograph module.
  • the invention concerns the field of watch mechanisms, and more particularly cogs.
  • Some watch movements include complications, which require specific assembly of the movement. For example, in the case of a clutch chronograph, it is necessary to assemble a gear wheel, such as a wheel or pinion, on a shaft already mounted on the movement.
  • a gear wheel such as a wheel or pinion
  • the removable wheel is arranged on an intermediate shaft of a transmission mobile connecting the mobile of the seconds counter of the chronograph to the mobile of the minutes counter of the chronograph.
  • this wheel is not easy, because the shaft on which it must be fixed is necessarily already mounted on the movement. In fact, the shaft is held in a bearing at each end, which are fitted into the plate or plate bridges, which cannot be added later if the removable wheel is present on the shaft. In other words, mounting the shaft with the removable wheel already attached is not possible. The wheel must be assembled to the shaft, after the latter has been at least partially mounted on the plate.
  • a hub is generally used passing through the wheel in its center, a conical end of the shaft being embedded in the hub to carry the wheel.
  • the shaft and/or the removable wheel may undergo unwanted buckling or bending, which may harm the proper functioning of the movement.
  • the hub is generally thick enough to support the casing and the support of the wheel, the latter requires resizing at the time of assembly, in order to be able to integrate into the movement. Furthermore, if necessary, the dismantling of the additional wheel and the movement parts, the dismantling of which depends on that of the additional wheel, is difficult, since it is necessary to remove the hub from the shaft. These operations waste time and require special tools and skills.
  • the invention aims to remedy the aforementioned drawbacks, and aims to provide a chronograph module comprising a removable wheel, the assembly and disassembly of which is facilitated.
  • the invention relates to a chronograph module for a watch movement, the chronograph module comprising a plate and/or a plate bridge, a primary shaft extending along a longitudinal axis around which it is movable in rotation , the primary shaft carrying a primary mobile extending in a plane substantially orthogonal to the longitudinal axis of the primary shaft, the primary shaft being mounted on the plate and/or the plate bridge, so that the mobile primary meshes with a gear train of the chronograph module.
  • the chronograph module comprises a removable wheel mounted on the primary shaft, the removable wheel comprising a peripheral meshing structure, as well as a first and a second elastic arm forming a clamp configured to grip the primary shaft, the primary shaft comprising a radial bearing surface on which the first and second elastic arms come to rest, so as to assemble the removable wheel on the primary shaft, the chronograph module comprising at least one part overlapping device arranged in a lower stage of the chronograph module, the arrangement and dimensions of the removable wheel in the chronograph module producing an overlap of the removable wheel and said overlapping part, so that the assembly of said overlapping part required absence of the removable wheel while the primary shaft is mounted on the chronograph module.
  • the removable wheel can easily be mounted and disassembled from the primary shaft.
  • the removable wheel can be easily disassembled and reassembled without using a specific tool, in particular to have access to the parts which require the removal of the removable wheel.
  • the overlap is between one tenth and half of the diameter of the removable wheel.
  • the end of the primary shaft comprises a radial bearing surface for the clamp.
  • said clamp in the free state, is circumscribed by a cylinder with a radius smaller than that of a cylinder circumscribed by said radial bearing surface.
  • the radial bearing surface is counter-conical.
  • the two arms each have a central notch, so as to form an orifice for the end of the primary shaft, preferably substantially circular.
  • the chronograph module comprises a secondary shaft and a chronograph driving pinion arranged on the secondary shaft, a tertiary shaft and a minute counter wheel arranged on the tertiary shaft.
  • the chronograph module comprises a quaternary shaft and a second wheel arranged on the quaternary shaft, the quaternary shaft being arranged around a part of the secondary shaft
  • the primary mobile is a drive wheel of the minute counter meshing with the second mobile of the chronograph arranged on the secondary shaft.
  • the removable wheel meshes with the mobile of the chronograph minute counter.
  • the chronograph module comprises a clutch flange sliding around the secondary shaft above the second wheel, between a rest position where the chronograph is not activated, and an operating position in which it is driven by the second wheel to actuate the secondary shaft.
  • the primary shaft comprises an axial stop bearing surface arranged to maintain the removable wheel in a position along the longitudinal axis of the primary shaft.
  • the overlapping part(s) are the clutch flange and/or a hammer and/or a rotating pan.
  • the invention also relates to a watch movement comprising such a chronograph module.
  • the invention relates to a chronograph module 1 for a clock movement.
  • the chronograph module represented on the figures 1 to 4 , comprises a primary shaft 3, here a transmission shaft, a secondary shaft 5, here a second shaft of the chronograph, a tertiary shaft 8, here a minute counter shaft of the chronograph, and a quaternary shaft 7, here a shaft of second.
  • the secondary shaft 5 is arranged inside the quaternary shaft 7.
  • the secondary shaft 5 and the quaternary shaft 7 are coaxial.
  • the quaternary shaft 7 can rotate independently of the secondary shaft 5.
  • the secondary shaft 5 and the quaternary shaft 7 rotate simultaneously, the quaternary shaft 7 driving the secondary shaft 5.
  • the primary shaft 3 is arranged between the secondary shaft 5 and the tertiary shaft 8, with an offset relative to the plane passing through the three shafts.
  • the primary 3, secondary 5 and tertiary 8 shafts are arranged at the vertices of a triangle, substantially at the same level.
  • the chronograph module 1 further comprises a minute counter wheel 9 arranged on the tertiary shaft 8, a chronograph driving pinion 13 arranged on the secondary shaft 5, and a second wheel 6 arranged on the quaternary shaft 7.
  • the minute counter wheel 9 and the second wheel 6 are arranged at a higher level of their respective shaft, while the chronograph driving pinion 13 is arranged at a lower level of the secondary shaft 5.
  • the chronograph module 1 also includes a clutch flange 15 configured to transmit the movement of the seconds mobile 6 to the driving pinion of the chronograph 13.
  • the clutch flange 15 is arranged on the secondary shaft 5, above the second wheel 6.
  • the clutch flange 15 slides longitudinally around the secondary shaft 5, between a rest position where the module of the chronograph 1 is not activated, and an operating position in which it is driven by the second wheel 6.
  • the chronograph module 1 also includes a primary mobile 4, here a driving mobile of the minute counter, which is arranged on the primary shaft 3, at a lower level of the primary shaft 3.
  • the primary mobile 4 meshes with the driving pinion 13 of the chronograph.
  • the chronograph driving pinion 13 rotates the primary mobile 4 and the primary shaft 3.
  • the chronograph module 1 also includes a hammer 17 and a rotating mallet 11 carried by the hammer 17.
  • the chronograph module 1 comprises a first core 14 of the chronograph wheel arranged on the secondary shaft 5, above the clutch flange 15, and a second core 12 of the minute counter arranged below the counter wheel. chronograph minute 9.
  • the chronograph module 1 comprises a removable wheel 2 arranged at an upper end of the primary shaft 3.
  • the removable wheel 2 is a transmission mobile meshing with the counter wheel. minute 9 of the tertiary shaft 8.
  • the removable wheel 2 activates the rotation of the minute counter wheel 9 and the tertiary shaft 8.
  • the removable wheel 2 is a transmission wheel, shown on the Figure 5 , the wheel comprising a peripheral meshing structure 21, which is annular and comprises gear teeth.
  • This removable wheel 2 further comprises at least one first radially elastic arm 22, and at least one second radially elastic arm 23.
  • the arms 22, 23 are symmetrical with respect to each other and substantially parallel.
  • the arms 22, 23 are arranged inside the ring and each connect two opposite points of the peripheral meshing structure 21.
  • the primary shaft 3 comprises an axial stop bearing surface 29 which is arranged to hold the removable wheel 2 in stop support on the primary shaft 3.
  • the axial stop 29 makes it possible to define a precise position of the removable wheel 2 on the primary shaft 3 along the longitudinal z axis, unlike a fitting where the position of the wheel in this direction is more difficult to control.
  • This first arm 22 and second elastic arm 23 together form a clamp 30, which is arranged to clamp a radial bearing surface 28 which the primary shaft 3 comprises in the vicinity of the axial stop bearing surface 7. The friction is thus ensured between the removable wheel 2 and the primary shaft 1.
  • the clamp 30 is configured to grip the end 25 of the primary shaft 3.
  • the primary shaft 3 comprises at its end 25 a radial bearing surface 28 on which the first 22 and the second elastic arm 23 come to support.
  • the elasticity of the arms 22, 23 allows them to be spread apart to introduce the end 25 of the primary shaft 2 between the arms 22, 23, then to let the arms 22, 23 tighten the radial support surface 28 by friction.
  • the radial bearing surface 28 is preferably inverted counter-conical in order to hold the removable wheel 2 on the end 25, against a stop arranged under the cone.
  • the inverted cone has its base at the end of the end 25 and its top oriented towards the middle of the primary shaft 3.
  • the elasticity of the arms 22, 23 of the removable wheel 2 is used, to allow correct installation, and, preferably, snapping into position.
  • the primary shaft 3 comprises an introduction ramp 27 arranged to radially push back the first elastic arm 22, and the second elastic arm 23 to facilitate the introduction of the removable wheel 2 onto the primary shaft 3.
  • the introduction ramp 27 is for example a chamfer arranged at the end of the primary shaft 3
  • the clamp 30 is circumscribed by a cylinder whose radius is less than that of a cylinder circumscribed by the radial bearing surface 28.
  • the two arms 22, 23 each have a central notch 24, so as to form an orifice for the end 25 of the primary shaft 3, the orifice preferably substantially circular
  • the chronograph module 1 comprises at least one overlapping part mounted in a lower stage of the chronograph module 1.
  • the arrangement and dimensions of the removable wheel 2 in the chronograph module 1 produces an overlap of the removable wheel 2 above said part overlapping.
  • the overlapping parts are the clutch flange 15, the rotating pan 11 and the hammer 17.
  • the removable wheel 2 overlaps the overlapping parts.
  • the clutch flange 15 has a radius greater than the result of subtracting the radius of the removable wheel 2 from the distance between the primary shaft 3 and the secondary shaft 5, so that a peripheral part of the clutch flange 15 is arranged below a peripheral part of the removable wheel 2 when they are assembled in the chronograph module 1.
  • the rotating pan 11 is arranged near the primary shaft 3. A portion of the rotating pan 11 passes directly below the removable wheel 2. A portion of the hammer 17 also passes directly below the removable wheel 2.
  • the removable wheel 2 can easily be removed or assembled to the primary axis 3. It facilitates in particular the repair or cleaning of a part of the chronograph module 1, which requires the removal of the removable wheel 2 .
  • FIG. 6 shows a watch movement in which the chronograph module according to the invention is mounted.
  • the minute counter wheel 9 the second wheel 6, and the removable wheel 2 meshing with the minute counter wheel 9.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Gears, Cams (AREA)
EP22173862.8A 2022-05-17 2022-05-17 Chronographenmodul mit einem abnehmbaren rad Pending EP4280002A1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP22173862.8A EP4280002A1 (de) 2022-05-17 2022-05-17 Chronographenmodul mit einem abnehmbaren rad
JP2023077637A JP2023169876A (ja) 2022-05-17 2023-05-10 取り外し可能車を備えるクロノグラフモジュール
CN202310559137.XA CN117075456A (zh) 2022-05-17 2023-05-17 配备有可拆卸轮的计时器模块

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22173862.8A EP4280002A1 (de) 2022-05-17 2022-05-17 Chronographenmodul mit einem abnehmbaren rad

Publications (1)

Publication Number Publication Date
EP4280002A1 true EP4280002A1 (de) 2023-11-22

Family

ID=81877883

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22173862.8A Pending EP4280002A1 (de) 2022-05-17 2022-05-17 Chronographenmodul mit einem abnehmbaren rad

Country Status (3)

Country Link
EP (1) EP4280002A1 (de)
JP (1) JP2023169876A (de)
CN (1) CN117075456A (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH1113467A4 (de) * 1967-08-08 1971-04-15
EP1708045A2 (de) * 2005-03-22 2006-10-04 Patek Philippe S.A. Befestigung eines Uhrrads an einer Spindel
CH703470A2 (fr) * 2010-07-21 2012-01-31 Blancpain Sa Pièce d'horlogerie à double affichage.
CH709792A2 (fr) * 2014-06-18 2015-12-31 Eta Sa Manufacture Horlogère Suisse Mobile d'horlogerie.
US9678477B2 (en) * 2014-09-12 2017-06-13 Seiko Instruments Inc. Mechanical component, mechanical component manufacturing method, movement, and timepiece

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH1113467A4 (de) * 1967-08-08 1971-04-15
EP1708045A2 (de) * 2005-03-22 2006-10-04 Patek Philippe S.A. Befestigung eines Uhrrads an einer Spindel
CH703470A2 (fr) * 2010-07-21 2012-01-31 Blancpain Sa Pièce d'horlogerie à double affichage.
CH709792A2 (fr) * 2014-06-18 2015-12-31 Eta Sa Manufacture Horlogère Suisse Mobile d'horlogerie.
US9678477B2 (en) * 2014-09-12 2017-06-13 Seiko Instruments Inc. Mechanical component, mechanical component manufacturing method, movement, and timepiece

Also Published As

Publication number Publication date
CN117075456A (zh) 2023-11-17
JP2023169876A (ja) 2023-11-30

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