EP4375757A1 - Aufzugsvorrichtung für ein uhrfederhaus, mit einer auskupplungsvorrichtung - Google Patents

Aufzugsvorrichtung für ein uhrfederhaus, mit einer auskupplungsvorrichtung Download PDF

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Publication number
EP4375757A1
EP4375757A1 EP22209423.7A EP22209423A EP4375757A1 EP 4375757 A1 EP4375757 A1 EP 4375757A1 EP 22209423 A EP22209423 A EP 22209423A EP 4375757 A1 EP4375757 A1 EP 4375757A1
Authority
EP
European Patent Office
Prior art keywords
ratchet
winding
winding shaft
barrel
toothing
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
EP22209423.7A
Other languages
English (en)
French (fr)
Inventor
Pierre Cusin
Laurent Jeanneret
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
Original Assignee
Nivarox Far 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 filed Critical Nivarox Far SA
Priority to EP22209423.7A priority Critical patent/EP4375757A1/de
Priority to US18/501,645 priority patent/US20240176294A1/en
Priority to JP2023189933A priority patent/JP2024076354A/ja
Priority to CN202311588648.0A priority patent/CN118068668A/zh
Publication of EP4375757A1 publication Critical patent/EP4375757A1/de
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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/18—Constructions for connecting the ends of the mainsprings with the barrel or the arbor
    • G04B1/20—Protecting arrangements against rupture or overwinding of the mainspring located in the barrel or attached to the barrel
    • 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
    • G04B11/00—Click devices; Stop clicks; Clutches
    • G04B11/001—Clutch mechanism between two rotating members with transfer of movement in both directions, possibly with limitation on the transfer of power
    • G04B11/003—Clutch mechanism between two rotating members with transfer of movement in both directions, possibly with limitation on the transfer of power with friction member, e.g. with spring action
    • 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
    • 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
    • G04B5/00—Automatic winding up
    • G04B5/24—Protecting means preventing overwinding

Definitions

  • the invention relates to a winding device, in particular a watch barrel, provided with disengagement means.
  • the invention also relates to a watch movement comprising such a winding device.
  • Most current mechanical watches with automatic winding generally include an oscillating mass driving a gear train by gravity, the rotation of the drum of which makes it possible to arm a leaf spring, the barrel spring, wound in a drum around an axis, by driving said axis. Rotation is usually forced in one direction, and is prevented from going backwards by a ratchet.
  • such barrels generally have a system for limiting the winding of the barrel spring.
  • This limitation is generally carried out by sliding the last external leaf of the spring against the internal wall of the drum. When the spring is fully cocked and wound around the barrel winding shaft, the last wound turn presses against the external wall of the drum.
  • the aim of the present invention is to overcome all or part of the drawbacks cited above by proposing a winding device provided with a system for limiting the winding of a spring, which replaces a system based on the sliding of a spring. a blade against notches in an internal wall of the drum.
  • the invention relates to a winding device, in particular a watch barrel provided with a spring, comprising a ratchet mounted on a rotary winding shaft, the rotary winding shaft being for example a barrel winding shaft whose rotation arms the barrel, and a winding gear meshing with the ratchet, the rotation of the winding gear causing the rotation of the ratchet and that of the rotating winding shaft by application of a torque on the ratchet, the winding device being provided with disengagement means of the ratchet and the rotating winding shaft.
  • the invention is remarkable in that the disengagement means are arranged on the ratchet and the rotary winding shaft, and are configured to disengage the ratchet and the winding shaft when the torque applied to the ratchet substantially exceeds a threshold value , especially when the barrel is fully cocked.
  • the ratchet hub disengages from the rotating winding shaft of the barrel and no longer transmits the rotational torque of the ratchet to the winding shaft of the barrel.
  • the ratchet continues to turn, driven by the winding gear, but the winding shaft no longer turns.
  • the risks of premature wear of the barrel are avoided, because the limiting device is arranged upstream and outside the barrel.
  • the disengagement means comprise a plurality of flexible pawls and a first set of teeth, the flexible pawls cooperating with the first set of teeth to transmit the torque of the ratchet to the rotating winding shaft to do so turn.
  • the flexible pawls mesh with the first toothing when the torque is lower than the threshold value.
  • the flexible pawls bend when the torque is significantly greater than the threshold value, so that the flexible pawls no longer mesh with the first tooth, the rotation of the ratchet no longer driving the rotating winding shaft.
  • the first toothing is arranged on the rotary winding shaft and the flexible pawls are arranged on the ratchet.
  • the ratchet comprises a hub on which the flexible pawls are arranged, the flexible pawls extending towards the rotating winding shaft.
  • the rotary winding shaft is arranged through the hub of the ratchet, the first toothing being arranged around the rotary winding shaft at the level of the hub.
  • the flexible pawls are distributed angularly around the rotating winding shaft.
  • each pawl comprises a flexible blade and a tooth arranged at the free end of the flexible blade, the teeth of the flexible pawls cooperating with the first toothing.
  • the ratchet comprises a peripheral rim provided with a second peripheral toothing cooperating with a third toothing of the winding train.
  • the ratchet is mounted on the barrel.
  • the rotary winding shaft is the winding shaft of the barrel making it possible to wind the barrel spring.
  • the invention also relates to a watch movement comprising a barrel, the watch movement comprising such a device for winding the barrel.
  • THE figures 1 and 2 represent an embodiment of a winding device 1, here a watch barrel 2, according to the invention.
  • the winding device 1 of the barrel 2 comprises a ratchet 3 and a winding gear 4.
  • the winding gear 4 meshes with the ratchet 3, so that when the winding gear 4 is rotated in a first direction, the ratchet 3 is rotated in a second direction opposite to the first direction.
  • the ratchet 3 is mounted on a winding shaft 5, the winding shaft 5 allowing the winding of the barrel 2.
  • the winding shaft 5 is the winding shaft of the barrel 2, the ratchet being mounted on barrel 2.
  • the winding shaft is not mounted on the barrel, the winding shaft comprising a pinion meshing with a mobile driving the winding shaft of the barrel to arm the spring, if the ratchet does not is not mounted on the barrel.
  • the winding shaft 5 is preferably cylindrical.
  • a first toothing 6 is arranged around the winding shaft 5.
  • the ratchet 3 comprises a hub 7 and a peripheral rim 8, the hub 7 being arranged inside the peripheral rim 8.
  • the hub 7 and the peripheral rim 8 have the shape of circular rings, the hub 7 having a radius smaller than that of the peripheral rim 8.
  • the hub 7 and the peripheral rim 8 are connected by at least one arm, here four arms 9 distributed angularly around the hub 7.
  • the hub 7 and the peripheral rim 8 preferably extend in the same plane.
  • the hub 7 delimits an interior space in which the winding shaft 5 passes at least in part.
  • the peripheral rim 8 comprises a second external toothing 11 distributed along the peripheral rim 8 around the ratchet 3.
  • the second toothing 11 cooperates with a third toothing 12 arranged on the winding gear 4.
  • the winding gear 4 comprises a pinion provided of the third toothing 12 arranged at its periphery.
  • the barrel 2 comprises a so-called “barrel” spring, wound in the form of a spiral (not shown in the figures), arranged inside the barrel 2, which must be armed, either by an automatic winding system, or by a manual winding system
  • the winding device 1 further comprises a system of cogs 13, for example driven by an automatic winding mass (not shown in the figures) of the watch movement.
  • the cog system 13 can also be driven by a winding stem (not shown in the figures) operable by means of a crown, in the case of manual winding.
  • a mobile 21 of the cog system 13 meshes with the third toothing 12 of the winding cog 4.
  • a torque is applied to the ratchet 4, which transmits it at least in part to the shaft winding gear 5 via the winding gear 4 driven by the mobile 21, and via the ratchet 3 driven by the winding gear 4.
  • the winding device 1 comprises means 10 for disengaging the ratchet and the winding shaft.
  • the disengagement means 10 comprise the first toothing 6 arranged around the winding shaft 5, preferably on the same level corresponding to that of the ratchet 3.
  • the disengagement means 10 also comprise a plurality of flexible pawls 15 extending from the hub 7 towards the winding shaft 5.
  • the flexible pawls 15 are distributed angularly inside the hub 7, in the plane of the ratchet 3.
  • the flexible pawls 15 cooperate with the first toothing 6, so that the rotation of the ratchet 3 generates the rotation of the winding shaft 5, when winding the barrel 2.
  • Each pawl 15 comprises a flexible blade 16 extending from the hub 7 of the ratchet 3. At the free end of each flexible blade 16, a tooth 17 is arranged capable of cooperating with the first toothing 6 of the winding shaft 5 During reassembly, the teeth 17 of the flexible pawls 15 are inserted into the first toothing 6 to rotate it.
  • the disengagement means 10 comprise at least one flexible pawl 15, preferably at least four flexible pawls.
  • the number of flexible pawls 15 depends on the flexibility of the flexible blades 16, and on the threshold value of the torque beyond which the disengagement means 10 are configured to disengage the ratchet 3 and the winding shaft 5.
  • the disengagement means 10 comprise sixteen flexible pawls 15 distributed around the winding shaft.
  • the flexible blades 16 are configured to bend beyond a torque threshold usually necessary to cock the barrel. Thus, beyond a threshold value, when the torque is too high, the flexible blades 16 bend, so that the teeth 17 of the flexible pawls 15 jump into the first toothing without being able to drive it. Consequently, the winding shaft 5 no longer turns despite the rotation of the ratchet 3.
  • the winding torque exerted on the winding shaft by the ratchet 3 is less than the threshold value, so that the flexible blades 16 of the flexible pawls 15 remain substantially straight.
  • the flexible pawls 15 drive the winding shaft 5 via the first toothing 6.
  • the barrel 2 further comprises a fourth peripheral toothing 18 configured to cooperate with a fifth toothing 19 of a mobile 20 of the watch movement.
  • the mobile 20 is for example a center mobile or an average wheel, or even a ringing mobile. Once armed, the barrel 2 supplies the energy necessary for the operation of the clock movement via the mobile 20.
  • the invention also relates to a watch movement, not shown in the figures, the movement comprising a barrel and a device for winding the barrel as described above.
  • the flexible pawls 15 are arranged on the ratchet 3 and the first toothing 6 is arranged on the winding shaft 5.
  • the flexible pawls on the winding shaft and to arrange a first set of teeth inside the ratchet hub.
  • the flexible blades of the flexible ratchets extend from the winding shaft towards the ratchet hub so as to cooperate with the first toothing.
  • the ratchet drives the winding shaft, and when the torque exerted on the flexible pawls exceeds the threshold value, the flexible blades bend and no longer engage. with the first toothing, the ratchet rotating without driving the winding shaft.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Transmission Devices (AREA)
EP22209423.7A 2022-11-24 2022-11-24 Aufzugsvorrichtung für ein uhrfederhaus, mit einer auskupplungsvorrichtung Pending EP4375757A1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP22209423.7A EP4375757A1 (de) 2022-11-24 2022-11-24 Aufzugsvorrichtung für ein uhrfederhaus, mit einer auskupplungsvorrichtung
US18/501,645 US20240176294A1 (en) 2022-11-24 2023-11-03 Winding device, in particular for a clock barrel, provided with disconnection means
JP2023189933A JP2024076354A (ja) 2022-11-24 2023-11-07 巻き上げデバイスと時計ムーブメント
CN202311588648.0A CN118068668A (zh) 2022-11-24 2023-11-24 尤其用于时钟发条匣的设有断开连接装置的上条设备

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22209423.7A EP4375757A1 (de) 2022-11-24 2022-11-24 Aufzugsvorrichtung für ein uhrfederhaus, mit einer auskupplungsvorrichtung

Publications (1)

Publication Number Publication Date
EP4375757A1 true EP4375757A1 (de) 2024-05-29

Family

ID=84361631

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22209423.7A Pending EP4375757A1 (de) 2022-11-24 2022-11-24 Aufzugsvorrichtung für ein uhrfederhaus, mit einer auskupplungsvorrichtung

Country Status (4)

Country Link
US (1) US20240176294A1 (de)
EP (1) EP4375757A1 (de)
JP (1) JP2024076354A (de)
CN (1) CN118068668A (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US335471A (en) * 1886-02-02 Watch-winding mechanism
GB190305378A (en) * 1903-03-07 1903-05-21 Nathan Silberberg Improvement in Watches
FR1354488A (fr) * 1962-04-19 1964-03-06 Celestin Konrad S A Montre à remontage par masse oscillante
CH1806568A4 (de) * 1968-12-04 1971-08-13
EP3220206A1 (de) * 2016-03-16 2017-09-20 Rolex Sa Übertragungsvorrichtung für uhr

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US335471A (en) * 1886-02-02 Watch-winding mechanism
GB190305378A (en) * 1903-03-07 1903-05-21 Nathan Silberberg Improvement in Watches
FR1354488A (fr) * 1962-04-19 1964-03-06 Celestin Konrad S A Montre à remontage par masse oscillante
CH1806568A4 (de) * 1968-12-04 1971-08-13
EP3220206A1 (de) * 2016-03-16 2017-09-20 Rolex Sa Übertragungsvorrichtung für uhr

Also Published As

Publication number Publication date
JP2024076354A (ja) 2024-06-05
US20240176294A1 (en) 2024-05-30
CN118068668A (zh) 2024-05-24

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