EP3855254A1 - Uhrwerk - Google Patents

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Publication number
EP3855254A1
EP3855254A1 EP20153487.2A EP20153487A EP3855254A1 EP 3855254 A1 EP3855254 A1 EP 3855254A1 EP 20153487 A EP20153487 A EP 20153487A EP 3855254 A1 EP3855254 A1 EP 3855254A1
Authority
EP
European Patent Office
Prior art keywords
gear
barrel
mobile
ratchet
winding
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
EP20153487.2A
Other languages
English (en)
French (fr)
Other versions
EP3855254A8 (de
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.)
Patek Philippe SA Geneve
Original Assignee
Patek Philippe SA Geneve
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 Patek Philippe SA Geneve filed Critical Patek Philippe SA Geneve
Priority to EP20153487.2A priority Critical patent/EP3855254A1/de
Publication of EP3855254A1 publication Critical patent/EP3855254A1/de
Publication of EP3855254A8 publication Critical patent/EP3855254A8/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
    • G04B3/00—Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously
    • 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
    • G04B13/007—Gearwork with differential work
    • 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
    • G04B21/00—Indicating the time by acoustic means
    • G04B21/02—Regular striking mechanisms giving the full hour, half hour or quarter hour
    • G04B21/12—Reiterating watches or clocks

Definitions

  • the present invention relates to a movement for a timepiece comprising a barrel as well as a winding mechanism for winding said barrel.
  • the winding mechanism comprises a toothed wheel called the winding ratchet and fixed to the barrel shaft.
  • a pawl on which a spring is pressed is arranged to immobilize the winding ratchet in the direction of the unwinding of the spring from the barrel, while during the manual or automatic winding of the movement by the winding mechanism, the winding ratchet pivots driving the shaft. barrel to cock it.
  • the barrel meshes via the teeth of its drum with the cog of the movement for its drive.
  • the aim of the present invention is to provide a movement for a timepiece making it possible to use the energy of the barrel to supply two outputs during its unwinding, one of these outputs being connected to the winding ratchet, all without disturbing the winding ratchet. manual or automatic winding of the motor unit.
  • the present invention relates to a movement for a timepiece according to claim 1 and a timepiece according to claim 8.
  • the figures 1 and 2 are schematic perspective views, respectively from above, of a part of a movement for a timepiece according to one embodiment of the invention.
  • the figure 3 is a sectional view along the AA axis of the figure 2 .
  • the movement for a timepiece comprises a barrel 1 formed of a drum 12 rotating freely on a barrel shaft 11 and of a motor spring 13 hooked by its inner coil to the barrel shaft 11 and by its turn external to the drum 12.
  • the drum 12 meshes by its toothing with the first pinion of a first gear train of the movement (not shown), in general the finishing gear, to the training of this first gear.
  • the movement for a timepiece according to the invention further comprises a winding mechanism (not shown), manual or automatic, for winding the barrel 1 and winding its mainspring 13.
  • a toothed wheel called the winding ratchet 2 is fixed to the barrel shaft 11.
  • the winding ratchet 2 is arranged to wind up the barrel 1 and its mainspring 13 when it pivots in a first direction driven by the winding mechanism and to drive a second cog of the movement when it pivots in a second direction, opposite to the first, when the barrel is unwound.
  • the movement according to the invention comprises a differential gear connecting the winding ratchet 2 on the one hand to the winding mechanism for its drive in a first direction allowing the winding of the barrel 1 and, on the other hand, to the second. cog of the movement for driving this second cog when unwinding the barrel 1. Only a pinion 3 of this second cog is shown in the figures.
  • the differential gear connecting the winding ratchet 2 to the winding mechanism and to the pinion 3 of the second gear train of the movement comprises an input mobile 4 formed of an input wheel 41 kinematically connected to the winding mechanism and cooperating with a pawl-spring 42 arranged to immobilize the input wheel 41 in the direction of unwinding of the barrel 1 (direction opposite to the winding direction).
  • the input mobile 4 further comprises an input pinion 43 coaxial and integral with the input wheel 41.
  • the input mobile 4 is therefore unidirectional, arranged to pivot, driven by the winding mechanism, only in only one direction, known as winding direction.
  • the differential gear further comprises a planet carrier wheel 6 carrying a planet wheel mobile 5 arranged to pivot freely about its axis.
  • the planet wheel 6 is rotated coaxially with the input mobile 4 and meshes with the winding ratchet 2.
  • the satellite mobile 5 comprises a first pinion 51 which meshes with the input pinion 43 and a second pinion 52 integral and coaxial with the first pinion 51 and which meshes with an output pinion 71.
  • the output pinion 71 is integral and coaxial of an output wheel 72 and forms with it an output mobile 7 coaxial with the input mobile 4.
  • the output wheel 72 is engaged with the pinion 3 of the second gear train of the movement for its drive.
  • the planet wheel 5 and the planet wheel 6 are then also immobilized and the winding ratchet 2 is blocked.
  • the barrel shaft 11 is also blocked and the barrel 1 disarms via its drum 12 which rotates freely and can drive the first cog of the movement.
  • the actuation of the winding mechanism drives the input wheel 41 in the winding direction authorized by the pawl 42.
  • the input pinion 43 integral with the input wheel 41 drives the first pinion 51 of the satellite mobile 5 and the second pinion 52 of the satellite mobile 5 around their axis.
  • the second pinion 52 further pivots around the output pinion 71 which, in this case, is fixed. In doing so, the second pinion 52 of the satellite mobile 5 makes turn the planet gear wheel 6 which in turn drives the winding ratchet 2 in a first direction in which it drives the barrel shaft 11 to wind up the barrel 1 and charge the mainspring 13.
  • the kinematic chain allowing the drive of the second gear is as follows: the barrel 1 disarms and the winding ratchet 2 is free to pivot, driven by the barrel shaft 11, in a second direction, opposite to the first and corresponding to the direction of disarming of the barrel.
  • the winding ratchet 2 then drives the planet carrier wheel 6.
  • the first pinion 51 of the planet gear 5 rotates around the axis of the planet carrier wheel 6 and also around its axis driven by the pinion gear. input 43 which remains fixed immobilized by the pawl 42.
  • the first pinion 51 of the satellite mobile 5 drives the second pinion 52 of the satellite mobile 5 which also pivots about its axis and in turn drives the output pinion 71 and the wheel output 72. This can then drive the pinion 3 of the second gear train of the movement which is free.
  • the differential gear is arranged to allow the two functions of winding the barrel 1 and driving the second gear 3 simultaneously: that is to say that the driving of the second gear 3 via the winding ratchet 2 when the barrel 1 can be disarmed at the same time as the winding of said barrel 1, that is to say at the same time as the actuation of the winding mechanism which causes the input mobile 41 to pivot in its winding direction.
  • the differential gear it is possible to safely operate the winding mechanism and therefore the input mobile 4 even when the winding ratchet 2 pivots in the second direction (disarming direction ) driven by the unwinding of barrel 1.
  • the actual winding energy received by the barrel 1 via the winding ratchet is a ratio of the energy spent via the winding ratchet 2 for driving the second gear 3 and the energy transmitted by the winding mechanism via the input mobile 4 of the differential.
  • the barrel 1 when disarming, can supply two outputs: one via its drum 12 and the other via the winding ratchet 2. Furthermore, despite this torque taking on the winding ratchet 2, the winding of said barrel 1 by the manual or automatic winding mechanism is permitted at all times. In addition, the use of a differential makes it possible to keep a relatively simple movement without greatly increasing its size.
  • the first gear of the movement driven by the barrel of the barrel is the finishing gear while the second gear of the movement driven by the winding ratchet can be very varied and in particular intended to cause a complication such as a date, a ringing. ..
  • the reverse is also possible and the finishing gear can also be driven via the winding ratchet while the drum can drive another gear (date, chime, etc.).
  • the cog connected to the winding ratchet can be driven continuously or in passing and depending on the type of cog, it can then include a release or clutch / release mechanism arranged to release it at the appropriate time (triggering of a chime, passage of the date ).
  • the movement for a timepiece comprises at least a first gear, a barrel comprising a drum rotating freely on a barrel axis and a motor spring hooked by its inner coil to the barrel shaft and by its turn external to the drum, a toothed wheel called the winding ratchet fixed on the barrel shaft and a winding mechanism for winding said barrel and its mainspring.
  • the winding ratchet is connected to the winding mechanism and to the first gear by a differential gear.
  • Said differential gear is arranged so that actuation of the winding mechanism drives the winding ratchet in a first direction making it possible to arm the mainspring of the barrel and so that, when the barrel is unwound, the winding ratchet pivoting in a second direction opposite to the first can drive the first gear.
  • the differential gear is also arranged to allow the driving of the first gear via the winding ratchet when the barrel is disarmed at the same time as the winding of said barrel when the winding mechanism is actuated.
  • the actual winding energy received by the barrel via the winding ratchet is a ratio of the energy expended via the winding ratchet for driving the first gear and the energy transmitted by the winding mechanism via differential gear.
  • the differential gear and in particular the internal gear ratios between the different moving parts that make it up can be chosen to promote the efficiency of the winding mechanism (that is to say to promote the kinematic chain connecting the input moving body. ratchet during winding) or to promote output efficiency on the movement train (that is to say to promote the kinematic chain between the ratchet and the output mobile).
  • the efficiency of the winding mechanism that is to say to promote the kinematic chain connecting the input moving body. ratchet during winding
  • output efficiency on the movement train that is to say to promote the kinematic chain between the ratchet and the output mobile.
  • the movement according to the invention thus makes it possible to use the energy of the barrel to supply two outputs: a first output via the drum of the barrel and a second output via the ratchet, all without disturbing the winding of said barrel.
  • the first and second outputs can either be the finishing cog of the watch and a secondary cog, for example for a complication such as a date, a chime, etc. or the opposite.
  • the movement according to the invention is particularly advantageous in the case where the cog driven by the ratchet is a mechanism designed to pass indications at an almost instantaneous speed (as opposed to a trailing mechanism), such as a date, a week, a moon phase ... Indeed, by using the ratchet to drive such an instantaneous mechanism, one avoids having to charge particular springs for many hours with the aim of causing instantaneous tripping and thus causing a significant loss of amplitude during arming hours. Conversely, it is possible to use the energy of the barrel via the ratchet during the jump (passage of the function) and thus limit the disturbance on the finishing gear.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Transmission Devices (AREA)
EP20153487.2A 2020-01-24 2020-01-24 Uhrwerk Pending EP3855254A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20153487.2A EP3855254A1 (de) 2020-01-24 2020-01-24 Uhrwerk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20153487.2A EP3855254A1 (de) 2020-01-24 2020-01-24 Uhrwerk

Publications (2)

Publication Number Publication Date
EP3855254A1 true EP3855254A1 (de) 2021-07-28
EP3855254A8 EP3855254A8 (de) 2021-09-08

Family

ID=69191895

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20153487.2A Pending EP3855254A1 (de) 2020-01-24 2020-01-24 Uhrwerk

Country Status (1)

Country Link
EP (1) EP3855254A1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1760548A1 (de) * 2005-09-01 2007-03-07 Montres Journe SA Uhr mit einer Vorrichtung zur Zeitangabe durch Läutwerk
EP1845425A1 (de) * 2006-04-12 2007-10-17 Montres Breguet S.A. Uhr mit Schlagwerk, das ein einziges Federhaus umfasst
EP1978424A1 (de) * 2007-04-04 2008-10-08 Montres Journe S.A. Chronograph
CH706808A2 (fr) * 2012-08-07 2014-02-14 Michael Bittel Montre à répétition minutes.
CH707593A2 (fr) * 2013-02-15 2014-08-15 Le Cercle Des Horlogers Sa Pièce d'horlogerie.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1760548A1 (de) * 2005-09-01 2007-03-07 Montres Journe SA Uhr mit einer Vorrichtung zur Zeitangabe durch Läutwerk
EP1845425A1 (de) * 2006-04-12 2007-10-17 Montres Breguet S.A. Uhr mit Schlagwerk, das ein einziges Federhaus umfasst
EP1978424A1 (de) * 2007-04-04 2008-10-08 Montres Journe S.A. Chronograph
CH706808A2 (fr) * 2012-08-07 2014-02-14 Michael Bittel Montre à répétition minutes.
CH707593A2 (fr) * 2013-02-15 2014-08-15 Le Cercle Des Horlogers Sa Pièce d'horlogerie.

Also Published As

Publication number Publication date
EP3855254A8 (de) 2021-09-08

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