EP3428738B1 - Antriebs- und positioniersystem, und raste für die umsetzung dieses systems - Google Patents

Antriebs- und positioniersystem, und raste für die umsetzung dieses systems Download PDF

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Publication number
EP3428738B1
EP3428738B1 EP17195976.0A EP17195976A EP3428738B1 EP 3428738 B1 EP3428738 B1 EP 3428738B1 EP 17195976 A EP17195976 A EP 17195976A EP 3428738 B1 EP3428738 B1 EP 3428738B1
Authority
EP
European Patent Office
Prior art keywords
jumper
drive
feeler
positioning system
cam
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
EP17195976.0A
Other languages
English (en)
French (fr)
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EP3428738A1 (de
Inventor
Stéphane von Gunten
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.)
Manufacture et Fabrique de Montres et Chronometres Ulysse Nardin Le Locle SA
Original Assignee
Manufacture et Fabrique de Montres et Chronometres Ulysse Nardin Le Locle SA
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Application filed by Manufacture et Fabrique de Montres et Chronometres Ulysse Nardin Le Locle SA filed Critical Manufacture et Fabrique de Montres et Chronometres Ulysse Nardin Le Locle SA
Publication of EP3428738A1 publication Critical patent/EP3428738A1/de
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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
    • G04B19/00—Indicating the time by visual means
    • G04B19/24—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars
    • G04B19/243—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator
    • G04B19/247—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator disc-shaped
    • 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/02—Back-gearing arrangements between gear train and hands
    • 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
    • G04B11/02—Devices allowing the motion of a rotatable part in only one direction
    • G04B11/04—Pawl constructions therefor, e.g. pawl secured to an oscillating member actuating a ratchet
    • 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
    • G04B13/002—Gearwork where rotation in one direction is changed into a stepping movement

Definitions

  • the present invention relates to the field of watchmaking. It relates, more particularly, to a drive and positioning system, particularly suitable for driving and positioning a display mobile, especially a jumping-type display mobile.
  • This type of system comprises a drive wheel, a driven wheel intended to be driven by the drive wheel, and a jumper comprising two inclined planes and a spring member arranged to press the inclined planes against the driven wheel and position it angularly.
  • the driven wheel generally carries the display mobile, although the latter can also be located further downstream in the kinematic chain.
  • a jumping-type display mobile is linked to a driven wheel, periodically driven by a driving wheel.
  • the driven wheel is positioned by a jumper, the inclined planes of which rest between two teeth or branches of the driven wheel.
  • the mobile display is therefore capable of occupying indexed positions, defined by the action of the jumper between the teeth or branches of the driven wheel. If the jumper keeps the display mobile in the indexed positions, it also participates in driving the driven wheel, by completing the step started by the driving wheel. Indeed, the latter drives the driven wheel by lifting the jumper and forcing the spring member until the top of the jumper located between the inclined planes passes between two following teeth or branches. Under the action of the spring member, the jumper then pushes the driven wheel to complete the angular drive pitch of the driven wheel.
  • the holding torque of the mobile display generated by the spring member is all the greater as the moment of inertia of the mobile display is large. Indeed, the spring member must be able to hold the mobile display in the event of significant accelerations, for example during shocks.
  • the torque taken from the movement to lift the jumper jumper during the first phase of driving the driven wheel can induce a loss of amplitude of the pendulum unacceptable, or even stop the movement.
  • the aim of the present invention is to propose a system for driving and positioning a mobile, in particular a mobile display, combining both very good positioning security and limiting the disturbances of the regulating member during moving from one indexed position to another.
  • the drive and positioning system comprises a synchronization cam driven by the drive wheel and a feeler comprising one end held in contact with the periphery of the synchronization cam and cooperating with the jumper, said synchronization and said feeler being arranged so as to exert on the jumper, at least when the n drive members cooperate with the driven wheel, a force whose moment relative to the axis of the jumper opposes the moment induced by the force exerted by the spring relative to said axis of the jumper.
  • this driving wheel 10 can be a 24h wheel, performing one revolution per 24h, and comprising a drive member 14 arranged to drive the driven wheel 12, in this case a 31 wheel, comprising 31 teeth, once a day.
  • the drive wheel 10 comprises a complete tooth forming the drive member 14, the other teeth being truncated.
  • the driven wheel 12 can integrally carry a display disc, not shown.
  • a person skilled in the art can obviously easily adapt the system to a date display of the large date type with a driven wheel with 12 to 10 positions for indicating the units, driving a tens wheel.
  • a person skilled in the art could also adapt the teaching of the present description to a display of other information.
  • the system according to the invention comprises a jumper 16.
  • the latter has a positioning zone, which can take the form of two inclined planes 18 and a spring member 20 arranged to press the zoned positioning 18 against the driven wheel 12.
  • the positioning zone 18 is made by inclined planes formed by a stone 21 arranged on a body 22 made of another material.
  • the positioning zone could also be produced by a cylindrical or semi-cylindrical body.
  • the stone could also be replaced by a part integrated into the jumper (piece in one piece).
  • the drive and positioning system further comprises a synchronization cam 24 driven by the driving wheel 10 and a feeler 26 comprising one end held in contact with the periphery of the cam and cooperating with the jumper 16.
  • the synchronization cam 24 and the feeler 26 are arranged so as to exert on the jumper 16, at least when the drive member 14 cooperates with the driven wheel 12, a force whose moment relative to the axis of the jumper opposes the moment induced by the force exerted by the spring, relative to said axis of the jumper.
  • the jumper 16 is pivotally mounted on a pivot axis.
  • the feeler 26 is integrally mounted (attached or in one piece) on the pivot axis.
  • the probe 26 comprises a base 26a pierced with an opening for mounting on the axis. From the base 26a, a lever 26b extends in the direction of the cam and its end is in contact with the periphery of the synchronization cam 24.
  • the lever 26b can be rigid or elastically deformable.
  • the latter comprises a slot 26c extending the edge of the lever 26b and which gives the lever 26b additional deformability in the plane of the system.
  • Base 26a of feeler 26 is integral with body 22 of jumper 16.
  • a pin 28 connects these two parts rigidly.
  • the feeler 26 In the case where the feeler 26 is elastically deformable, it exerts on the jumper 16, for a given deformation, a force whose moment relative to the axis of the jumper is greater than that induced by the force exerted by the spring member 20 on the jumper 16 and along the axis of rotation of the jumper, so that an action of the cam on the sensor 26 causes a movement of the jumper 16 and a deformation of the spring member 20.
  • the body of the jumper 22, the spring member 20 and the feeler can be made in one piece, for example with monolevel or multilevel etching techniques.
  • the synchronization cam 24 is mounted coaxial with the drive wheel 10. Although the illustrated solution is preferable, one could consider, for questions of position or size of the lever 26b, to arrange the cam 24 on another mobile, meshing directly or indirectly with the drive wheel 10.
  • the synchronization cam 24 can be integral with the driving wheel 10. Preferably, it is mounted loose on the axis of the driving wheel 10 and driven in rotation by the latter by means of a finger 30 integral with the driving wheel. 10 and which takes place in a groove 32 concentric with the axis of the drive wheel 10, formed in the cam 24. Thanks to this construction, as will be understood below, during the passage of the jumper 16, the support of the feeler 26 on cam 24 does not interfere with the second part of the jump, under the action of spring member 20, cam 24 being able to advance, thanks to the play between finger 30 and groove 32.
  • the drive wheel 10 comprises the groove, concentric with the axis of the synchronization cam.
  • the finger is integral with the synchronization cam and takes place in the groove.
  • the synchronization cam 24 defines a circular rest portion 24a having a first radius, and an active portion 24b having a radius greater than the first radius.
  • the first radius is sized as a function of the length of feeler 26 and of the respective position of cam 24 and feeler 26, so that jumper 16 is only subjected to the action of the member spring 20 when feeler 26 is in contact with circular rest portion 24a.
  • the active portion 24b has a variable radius, increasing then decreasing.
  • the active portion 24b is sized so that the jumper 16 is subjected to the combined action of the spring member 20 and of the feeler 26, when the latter is in contact with an active portion 24b.
  • the radius of the active portion is limited so that the displacement induced on the jumper 16 is less than the penetration of the jumper 16 between the teeth of the driven wheel 12. In other words, the jumper 16 remains in contact with the driven wheel 12, to position it and participate in its drive.
  • the synchronization cam 24 is angularly positioned on the drive wheel 10, so that the sensor 26 is located at the top of the cam 24, substantially when the beak of the jumper 16, located between the inclined planes 18, passes the tip of one tooth of the driven wheel 12.
  • the feeler 26 is in bearing on the rest portion 24a of the cam.
  • the driven wheel 12 and the mobile display it carries are positioned by the jumper 16 and its spring member 20 ( Fig. 1 ).
  • the cam 24 pivots by being pushed by the finger 30 which presses on a first end of the groove 32.
  • the feeler 26 begins to rise on the active portion 24b of the cam, it exerts on the jumper 16 a force whose moment by relative to the axis of rotation of the jumper tends to oppose the moment induced by the force exerted by the spring member 20, relative to said axis of rotation of the jumper.
  • the picture 2 illustrates the moment of passage from jumper 16 to the next interval.
  • feeler 26 is resting on the top of active portion 24b of synchronization cam 24.
  • the force applied to jumper 16 by feeler 26 is maximum, which consequently means that the force applied by jumper 16 on driven wheel 12, is minimal.
  • the torque that drive wheel 10 must apply to cause driven wheel 12 to rotate is therefore reduced.
  • feeler 26 presses on the part of active portion 24b whose radius decreases (taking the direction of rotation of the cam as a reference) and causes the cam to advance until the finger 30 presses against the second end of the groove 32. have all his strength to carry out the driving of the driven wheel 12, after the jump of the tooth on the jumper 16.
  • the maximum torque required to drive the driven wheel 12 is reduced, without reducing the force of the spring member 20 of the jumper 16, which allows to maintain good security.
  • n drive members 14 n ⁇ 2
  • the synchronization cam 24 can then be arranged on a mobile driven by the drive wheel 10, with a meshing ratio of n, that is to say that the mobile will turn n times faster than the drive wheel 10.
  • the synchronization cam 24 can also be arranged coaxially with drive wheel 10 and include n rest portions and n active portions.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)
  • Electromechanical Clocks (AREA)
  • Measurement Of Distances Traversed On The Ground (AREA)

Claims (10)

  1. Antriebs- und Positioniersystem eines Anzeigedrehteils, umfasst:
    - ein Antriebsrad (10), das n Antriebsorgane (14) umfasst,
    - ein getriebenes Rad (12), das dazu bestimmt ist, durch die n Antriebsorgane (14) angetrieben zu werden,
    - eine Hebelfeder (16), umfassend einen Positionierbereich (18) und ein Federorgan (20), das dazu angeordnet ist, den Positionierbereich (18) gegen das getriebene Rad (12) zu drücken und ihn winklig zu positionieren,
    dadurch gekennzeichnet, dass es einen Synchronisiernocken (24), der durch das Antriebsrad (10) angetrieben wird, und einen Taster (26), der ein Ende, das mit dem Außenrand des Synchronisiernockens (24) in Kontakt gehalten wird, umfasst und mit der Hebelfeder (16) zusammenwirkt, umfasst, wobei der Synchronisiernocken (24) und der Taster (26) so angeordnet sind, dass sie, zumindest wenn die n Antriebsorgane (14) mit dem getriebenen Rad (12) zusammenwirken, eine Kraft auf die Hebelfeder (16) ausüben, deren Moment in Bezug auf die Drehachse der Hebelfeder sich dem Moment entgegensetzt, das durch die Kraft, die durch die Feder in Bezug auf die Drehachse der Hebelfeder ausgeübt wird, erzeugt wird.
  2. Antriebs- und Positioniersystem nach Anspruch 1, dadurch gekennzeichnet, dass der Taster (26) fest mit der Hebelfeder (16) verbunden ist.
  3. Antriebs- und Positioniersystem nach Anspruch 2, dadurch gekennzeichnet, dass die Hebelfeder (16) fest an einer Schwenkachse montiert ist, und dass der Taster (26) fest mit der Schwenkachse verbunden ist.
  4. Antriebs- und Positioniersystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Synchronisiernocken (24) koaxial zu dem Antriebsrad (10) montiert ist.
  5. Antriebs- und Positioniersystem nach Anspruch 4, dadurch gekennzeichnet, dass der Synchronisiernocken (24) freilaufend auf der Achse des Antriebsrads (10) montiert ist.
  6. Antriebs- und Positioniersystem nach Anspruch 5, dadurch gekennzeichnet, dass der Synchronisiernocken (24) eine Nut (32) umfasst, die zu der Achse des Antriebsrads (10) konzentrisch ist und in der ein Finger (30) Platz findet, der fest mit dem Antriebsrad (10) verbunden ist.
  7. Antriebs- und Positioniersystem nach Anspruch 5, dadurch gekennzeichnet, dass das Antriebsrad (10) eine Nut (32) umfasst, die zu der Achse des Synchronisiernockens (24) konzentrisch ist und in der ein Finger (30) Platz findet, der fest mit dem Synchronisiernocken (24) verbunden ist.
  8. Antriebs- und Positioniersystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Synchronisiernocken (24) n kreisförmige Ruheabschnitte, die einen ersten Radius aufweisen, und n aktive Abschnitte, die einen Radius, der größer als der erste Radius ist, aufweisen, definiert, wobei die Hebelfeder (16) mindestens der Wirkung des Federorgans (20) unterliegt, wenn sich der Taster (26) mit einem kreisförmigen Ruheabschnitt in Kontakt befindet, wobei die Hebelfeder (16) der kombinierten Wirkung des Federorgans (20) und des Tasters (26) unterliegt, wenn sich letzterer mit einem aktiven Abschnitt in Kontakt befindet.
  9. Antriebs- und Positioniersystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Taster (26) starr ist.
  10. Antriebs- und Positioniersystem nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der Taster (26) elastisch verformbar ist.
EP17195976.0A 2016-10-24 2017-10-11 Antriebs- und positioniersystem, und raste für die umsetzung dieses systems Active EP3428738B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH01416/16A CH713066A2 (fr) 2016-10-24 2016-10-24 Système d'entraînement et de positionnement et sautoir pour la mise en œuvre dudit système.

Publications (2)

Publication Number Publication Date
EP3428738A1 EP3428738A1 (de) 2019-01-16
EP3428738B1 true EP3428738B1 (de) 2022-02-16

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Application Number Title Priority Date Filing Date
EP17195976.0A Active EP3428738B1 (de) 2016-10-24 2017-10-11 Antriebs- und positioniersystem, und raste für die umsetzung dieses systems

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EP (1) EP3428738B1 (de)
CH (1) CH713066A2 (de)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2066958A1 (de) * 1969-11-03 1971-08-13 Tissot Horlogerie

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH470703A (fr) * 1965-06-14 1967-01-31 Montres Perret Et Berthoud Sa Pièce d'horlogerie comprenant un mécanisme de quantième à saut instantané
CH545500A (fr) * 1970-06-29 1974-01-31 Omega Brandt & Freres Sa Louis Montre-calendrier

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2066958A1 (de) * 1969-11-03 1971-08-13 Tissot Horlogerie

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CH713066A2 (fr) 2018-04-30
EP3428738A1 (de) 2019-01-16

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