EP4296788A1 - Vorrichtung zum automatischen aufziehen einer feder im federhaus eines uhrwerks - Google Patents

Vorrichtung zum automatischen aufziehen einer feder im federhaus eines uhrwerks Download PDF

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Publication number
EP4296788A1
EP4296788A1 EP22180159.0A EP22180159A EP4296788A1 EP 4296788 A1 EP4296788 A1 EP 4296788A1 EP 22180159 A EP22180159 A EP 22180159A EP 4296788 A1 EP4296788 A1 EP 4296788A1
Authority
EP
European Patent Office
Prior art keywords
reduction
rotation
mobile
wheels
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.)
Pending
Application number
EP22180159.0A
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 EP22180159.0A priority Critical patent/EP4296788A1/de
Priority to US18/310,052 priority patent/US20230408978A1/en
Priority to CN202310527499.0A priority patent/CN117270363A/zh
Priority to JP2023099176A priority patent/JP2024000985A/ja
Publication of EP4296788A1 publication Critical patent/EP4296788A1/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
    • G04B5/00—Automatic winding up
    • 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
    • G04B5/02—Automatic winding up by self-winding caused by the movement of the watch
    • 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
    • G04B11/00—Click devices; Stop clicks; Clutches
    • G04B11/006—Clutch mechanism between two rotating members with transfer of movement in only one direction (free running devices)
    • G04B11/008—Clutch mechanism between two rotating members with transfer of movement in only one direction (free running devices) with friction members, e.g. click springs or jumper
    • 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
    • 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
    • G04B5/02—Automatic winding up by self-winding caused by the movement of the watch
    • G04B5/10—Automatic winding up by self-winding caused by the movement of the watch by oscillating weights the movement of which is not limited
    • G04B5/14—Automatic winding up by self-winding caused by the movement of the watch by oscillating weights the movement of which is not limited acting in both directions

Definitions

  • the devices for automatically winding a barrel spring of a watch are known to allow the transmission of a torque to a barrel ratchet with a view to winding said spring, whatever the direction of rotation of the oscillating mass.
  • the oscillating mass pivots in a second direction, it drives the first wheel in rotation in the first direction, the pawl which it carries separating in rotation said first wheel and the pinion around which it is mounted.
  • the first wheel rotates the second wheel in the second direction, and the pawl which it carries secures its rotation with that of the pinion around which it is mounted, said pinion then rotating the output mobile in the first meaning.
  • winding of the barrel spring is also possible manually, by action on a winding rod kinematically linked to the barrel ratchet, so that its rotation, said winding rod causes the rotation of said ratchet.
  • the barrel ratchet drives the pinions of the clutch wheels in rotation via the output wheel.
  • the pawls of each of the two wheels of said clutch wheels are actuated so as to separate said pinions from said wheels in rotation.
  • the pawls Due to the reduction ratios between the barrel ratchet, the output mobile, and the pinions, the pawls are subjected to very high angular speeds, which is the cause of lubrication problems and premature wear of said ratchets.
  • these clutch mobile mechanisms have the disadvantage of generating significant mechanical clearance between the pawls and the teeth of the clutch mobile pinions during changes in the direction of rotation of the clutch mobile wheels.
  • These games called “blind spots” by those skilled in the art, cause noise, shocks, vibrations and premature wear of the moving parts causing these games.
  • the blind angle also reduces the ability of the winding device to wind the barrel because while the mass travels through this angle, it does not allow the barrel to be wound.
  • the invention resolves the aforementioned drawbacks and concerns for this purpose a device for automatically winding a barrel spring of a watch, comprising an oscillating mass, an input mobile kinematically linked to the oscillating mass, two reduction mobiles and a mobile ratchet trainer.
  • Each reduction mobile comprises a reduction wheel carrying at least four satellites, and a transmission pinion around which the reduction wheel is mounted.
  • the input mobile is kinematically connected to the two reduction wheels so that, whatever the direction of rotation in which it is driven by the oscillating mass, it drives the two reduction wheels to rotate in different directions. the other.
  • the invention may also include one or more of the following characteristics, taken individually or in all technically possible combinations.
  • the reduction mobiles are identical to each other.
  • the transmission pinions comprise a first toothing cooperating with the satellites and a second toothing cooperating with the ratchet driving mobile.
  • FIG. 1 shows a device 10 for automatically winding a barrel spring of a watch according to a preferred embodiment.
  • the winding device 10 comprises an oscillating mass 11, an input mobile 12 engaged with the oscillating mass 11, two reduction mobiles 13 and a ratchet driving mobile 14 intended to cooperate with a ratchet (not shown in the figures).
  • the input wheel 12 is in kinematic relationship, through an input wheel 120 with which it is equipped, with the oscillating mass 11 so that when the latter pivots, it rotates said input wheel 12.
  • the input wheel 120 is meshed, for this purpose, with a driving wheel 110 rigidly fixed to the oscillating mass 11, that is to say without degree of freedom.
  • the driving wheel 110 comprises, in the preferred embodiment of the invention, a number of teeth identical to that of the input wheel 120.
  • the input wheel 12 further comprises a pinion 121 around which the input wheel 120 is rigidly fixed, intended to transmit a rotational movement from said input wheel 12 to one of the reduction wheels 13 with which it is meshed.
  • each reduction wheel 13 comprises a reduction wheel 130 carrying at least four satellites 131, and a transmission pinion 132 around which the reduction wheel 130 is mounted idle, that is to say with a degree of freedom in rotation.
  • the input mobile 12 is kinematically connected to the two reduction wheels 130 so that, whatever the direction of rotation in which it is driven by the oscillating mass 11, it drives the two reduction wheels 130 in rotation according to meanings different from each other.
  • one of the reduction wheels 130 is in meshing relationship with the input mobile 12, in particular with the pinion of the input mobile 12, and with the other reduction wheel 130.
  • the reduction mobiles 13 are identical to each other.
  • the manufacturing and assembly of the device are facilitated, and economies of scale can be achieved.
  • THE figures 2 And 3 represent in detail a reduction mobile 13 according to the preferred embodiment of the present invention.
  • the satellites 131 form, in each of the reduction wheels 13, pawls configured to secure in rotation the transmission pinion 132 and the reduction wheel 130 only when said reduction wheel 130 pivots in a predefined direction of rotation, here the direction hourly.
  • a predefined direction of rotation here the direction hourly.
  • one of the satellites 131 is blocked in rotation against the transmission pinion 132 and applies a moment of force to the teeth of the transmission pinion 132 with which it cooperates, which causes said transmission pinion 132 and the reduction wheel 130 to become joined in rotation.
  • This technical effect is in particular due to the asymmetrical shape of the teeth of the satellites 131.
  • the top of one of its teeth is arranged to rest against the head of an opposite tooth of the transmission pinion 132, said head then constituting a stop.
  • the reduction mobiles 13 being identical to each other, the predefined direction of rotation in which the satellites 131 secure in rotation the reduction wheel 130 and the transmission pinion 132 is identical for both of the reduction wheels 130.
  • the reduction wheels 130 being both driven in rotation in different directions during the rotation of the oscillating mass 11, whatever the direction of rotation of the latter, one of the transmission gears 132 is driven to pivot in the predefined direction, that is to say clockwise.
  • the transmission pinions 132 comprise a first toothing 1320 cooperating with the satellites 131 and materializing a sun wheel, and a second toothing 1321 cooperating with the ratchet driving mobile 14, the first toothing 1320 comprising a greater number of teeth than that of the second toothing 1321.
  • the first and second teething 1320 and 1321 are advantageously fixed on the same shaft and are fixed in rotation relative to each other. In the figures, these first and second teeth 1320 and 1321 are represented schematically by their reference cylinders.
  • each satellite 131 are distributed regularly around the transmission pinion 132 and are each arranged in angular positions, around their respective axes of rotation, different from each other.
  • each satellite 131 has a different orientation so that the engagement of the teeth of the satellites 131 between the teeth of the transmission pinion 132 is different for each of said satellites 131.
  • the mechanical clearance existing between the teeth of the satellite 131 which will apply a moment of force on the teeth of the transmission pinion 132, in particular of the first toothing 1320, and the latter, that is to say the blind spot is minimized.
  • the blind spot is also reduced thanks to the number of 131 satellites.
  • the input mobile 12 and the reduction wheels 130 are dimensioned so that between the oscillating mass 11 and the reduction wheels 130 a reduction ratio greater than or equal to 1/3 is generated, preferably a reduction ratio of 1/5.
  • the transmission gears 132 and the ratchet driving mobile 14 are dimensioned so that the gear train formed between said transmission gears 132 and the ratchet, or between said transmission gears 132 and the ratchet driving mobile 14 , has a reduction ratio less than or equal to 1/50, preferably a reduction ratio equal to 1/25.
  • the invention therefore has the advantage of limiting the rotation speed of the satellites 131 for a given rotation speed of the oscillating mass 11 in the case of automatic winding and for a given rotation speed of the ratchet in the case of 'manual winding via a winding stem.
  • Such an arrangement makes it possible to extend the life of the satellites 131 while eliminating possible vibrations which could result from too high a rotation speed.
  • the arrangement and dimensioning of the input mobile 12, the reduction wheels 130, the transmission pinion 132 and the ratchet driving mobile 14 as previously described are advantageously enabled by the reduction in the dead angle resulting from the number of satellites 131.
  • the satellites 131 have been described in the form of toothed wheels in the present text, but they can take the form of any other type of ratchet.
  • the winding device 10 according to the invention may include other reduction mobiles and the input mobiles 12, reduction mobiles 13 and ratchet driver 14 can be arranged differently than the arrangement described and shown in the figures.
EP22180159.0A 2022-06-21 2022-06-21 Vorrichtung zum automatischen aufziehen einer feder im federhaus eines uhrwerks Pending EP4296788A1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP22180159.0A EP4296788A1 (de) 2022-06-21 2022-06-21 Vorrichtung zum automatischen aufziehen einer feder im federhaus eines uhrwerks
US18/310,052 US20230408978A1 (en) 2022-06-21 2023-05-01 Device for automatic winding of a barrel spring of a horological movement
CN202310527499.0A CN117270363A (zh) 2022-06-21 2023-05-11 钟表机芯的发条盒发条的自动上条装置
JP2023099176A JP2024000985A (ja) 2022-06-21 2023-06-16 時計ムーブメントの香箱ぜんまいの自動巻上げ装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22180159.0A EP4296788A1 (de) 2022-06-21 2022-06-21 Vorrichtung zum automatischen aufziehen einer feder im federhaus eines uhrwerks

Publications (1)

Publication Number Publication Date
EP4296788A1 true EP4296788A1 (de) 2023-12-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22180159.0A Pending EP4296788A1 (de) 2022-06-21 2022-06-21 Vorrichtung zum automatischen aufziehen einer feder im federhaus eines uhrwerks

Country Status (4)

Country Link
US (1) US20230408978A1 (de)
EP (1) EP4296788A1 (de)
JP (1) JP2024000985A (de)
CN (1) CN117270363A (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2897000A1 (de) * 2014-01-15 2015-07-22 Audemars Piguet (Renaud et Papi) SA Wendegetriebe für Uhr
EP3104232A1 (de) * 2015-06-11 2016-12-14 Société anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Wendegetriebe für uhr, und armbanduhr mit automatischem aufzug, in der es anwendung findet

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2897000A1 (de) * 2014-01-15 2015-07-22 Audemars Piguet (Renaud et Papi) SA Wendegetriebe für Uhr
EP3104232A1 (de) * 2015-06-11 2016-12-14 Société anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Wendegetriebe für uhr, und armbanduhr mit automatischem aufzug, in der es anwendung findet

Also Published As

Publication number Publication date
JP2024000985A (ja) 2024-01-09
US20230408978A1 (en) 2023-12-21
CN117270363A (zh) 2023-12-22

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