EP1801667A1 - Getriebe für Uhrwerke, Mechanismus und Uhrwerk, das ein solches Getriebe umfasst, sowie Rad zur Ausrüstung eines solchen Getriebes - Google Patents

Getriebe für Uhrwerke, Mechanismus und Uhrwerk, das ein solches Getriebe umfasst, sowie Rad zur Ausrüstung eines solchen Getriebes Download PDF

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Publication number
EP1801667A1
EP1801667A1 EP05112645A EP05112645A EP1801667A1 EP 1801667 A1 EP1801667 A1 EP 1801667A1 EP 05112645 A EP05112645 A EP 05112645A EP 05112645 A EP05112645 A EP 05112645A EP 1801667 A1 EP1801667 A1 EP 1801667A1
Authority
EP
European Patent Office
Prior art keywords
teeth
wheel
truncated
tooth
driven 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.)
Granted
Application number
EP05112645A
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English (en)
French (fr)
Other versions
EP1801667B1 (de
Inventor
Alain Schiesser
Christophe Claret
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 CLARET SA
Original Assignee
Christophe Claret 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 Christophe Claret SA filed Critical Christophe Claret SA
Priority to EP05112645A priority Critical patent/EP1801667B1/de
Priority to ES05112645T priority patent/ES2381556T3/es
Priority to AT05112645T priority patent/ATE545070T1/de
Publication of EP1801667A1 publication Critical patent/EP1801667A1/de
Application granted granted Critical
Publication of EP1801667B1 publication Critical patent/EP1801667B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G04B13/028—Wheels; Pinions; Spindles; Pivots wheels in which the teeth are conic, contrate, etc; also column wheels construction

Definitions

  • the present invention relates to the field of watchmaking. It relates, more particularly, to a gear intended to be implemented in a movement for a timepiece, of the type comprising a driving wheel and a toothed gear wheel capable of meshing with each other by their respective teeth.
  • a driving wheel and a toothed gear wheel capable of meshing with each other by their respective teeth.
  • One of these two wheels can possibly take the form of a pinion.
  • the driving wheel comprises at least a first toothed sector, driving, defining its teeth and at least a second non-toothed positioning sector, arranged at a constant intermediate level with reference to the height of the toothing.
  • the corresponding timepiece is of the type comprising a mechanism for displaying a large date, that is to say comprising respective means for displaying the units and dozens of separate dates.
  • Such mechanisms are well known in the state of the art, such as the patent CH 310559, issued October 31, 1955 in the name of the Watchmaking Factory of Fontainemelon.
  • This document describes a watch movement including means for displaying a large date as defined above.
  • the movement comprises in particular three coaxial and rotationally fixed wheels, a first of which is driven by an element of the work-finishing train, a second driving being arranged to drive a display disc. units of the date while the third, also leading, is arranged to drive a display disk dozens of the date.
  • the first wheel has thirty-one teeth and is driven at the rate of one tooth per day.
  • the second wheel has thirty teeth of the same length and a tooth having a truncation extending to the bottom of the toothing to define an undirected sector, of length corresponding to a tooth.
  • This wheel meshes with a pinion comprising ten teeth and secured to a disc bearing the numbers from 0 to 9.
  • a technical solution to completely eliminate the risk of inadvertent jumping gear units is also known from the state of the art.
  • This solution consists in providing a height of the toothed sector, intermediate with reference to the height of the toothing and, sufficient to prevent the rotation of the gear of the units of a complete step, a jumper ensuring the return of the pinion in its stable position after shock. Indeed, at the moment of impact, when the pinion rotates on itself, one of its teeth collides with the toothed sector of the drive wheel, by its tip, to limit its rotation.
  • the main object of the present invention is to improve the reliability and longevity of the gears of the prior art, by proposing a technical solution making it possible to avoid accidental jumps of the display members in the event of impact, while improving the resistance mechanical gear wheel gearing involved.
  • the invention relates to such a gear, characterized in that the driven wheel comprises at least a first tooth truncated to have a shape substantially complementary to that of the positioning sector when it is arranged opposite the latter. Furthermore, the gearing is further characterized by the fact that the respective teeth of the driving and driven wheels are arranged and numbered in such a way that, when the toothed sector is arranged facing the driven wheel, the first truncated tooth of the latter faces him.
  • the truncated tooth of the driven wheel allows rotation of the driving wheel without the first being driven while the positioning sector moves opposite the latter.
  • the free portion of the truncated tooth is not pointed, like the head of a conventional tooth, makes it possible to limit the mechanical stresses it is likely to undergo in the event of an impact and therefore the risks of damage.
  • a gear of this type is used to display a date of the big date type, more specifically, the display of the value of the unit of that date.
  • the driven wheel comprises a multiple m of ten teeth, including m first truncated teeth.
  • the driving wheel, or wheel units has a number of teeth equal to thirty-one times the multiple m minus (m + one) teeth, or 31 m - (m + 1), the periphery of the wheel corresponding to the length of a toothing of 31 m teeth.
  • the multiple m is taken equal to two, which corresponds to fifty nine teeth for the unit wheel, the toothless sector having a length corresponding to three teeth, and twenty for the driven wheel, including two teeth truncated to present teeth. free surfaces of respective shapes substantially complementary to that of the positioning sector when they are arranged opposite the latter.
  • the present invention also relates to a watch movement in which such a gear is implemented, as well as a wheel meeting the characteristics of the driven wheel set out above.
  • FIG. 1a shows a schematic view from above of a gear comprising a driving wheel and a driven wheel engaged with this driving wheel, according to a first preferred embodiment of the present invention, at a first given moment of its implementation. artwork;
  • FIGS. 1b and 1c respectively represent a schematic view from above of a detail of the gear of FIG. 1a, at a second and a third successive instants of implementation of the first embodiment, subsequent to the first instant of Figure 1a;
  • FIG. 2 represents an elevational view of the wheels represented in FIG. 1a, when they are implemented in a mechanism for displaying a date of the big date type
  • FIG. 3 shows an elevational view of a driving wheel and a driven wheel according to a second preferred embodiment of the present invention.
  • Figures 1a, 1b and 1c show a schematic view of a preferred embodiment of a driving wheel 1 and a driven wheel 2, or pinion, engaged with each other, for equipping a movement for a timepiece incorporating a date display of the big date type, at three successive times, during operation.
  • the driving wheel 1 comprises a driving sector, having a planetary gearing of fifty-nine identical teeth 100, and a non-toothed positioning sector, 101 extending over a width corresponding to three teeth 100.
  • the positioning sector 101 has a constant level with respect to the bottom of the toothing substantially corresponding to the height of the foot of the teeth 100. More specifically, the free portion 102 of the positioning sector has substantially the shape of an arc whose center coincides with that of the wheel 1.
  • the driving wheel 1 comprises a central opening 3 intended to cooperate with a shaft or tenon (not shown) to ensure the maintenance and radial guidance.
  • a plurality of holes 4 is also provided in the driving wheel 1, in particular to ensure the positioning and fixing of the driving wheel on a wheel with thirty-one conventional teeth, as will be explained in connection with the detailed description Figure 2.
  • the driven wheel, or pinion, 2 has a toothing having twenty teeth 200, two first teeth 201 and 202 are truncated at their respective heads. Second and third teeth, 203 and 204, are also truncated more significantly than the first teeth 201 and 202, their free portions being substantially rectilinear, by way of non-limiting example.
  • the driven wheel 2 comprises a central opening 5 intended to cooperate with a shaft or tenon (not shown) to ensure the maintenance and radial guidance.
  • a hole 6 is provided in the driven wheel, away from its central opening 5, which can be used to ensure its relative angular positioning with respect to a constituent element of the date display mechanism. It can be seen in the configuration shown in FIG. 1a that the free portions 210 and 220 of the first truncated teeth 201 and 202 have particular curved shapes. Indeed, these free portions are preferably shaped so as to substantially match the shape of the free portion 102 of the positioning sector 101.
  • the positioning sector 101 moves with respect to the driven wheel 2 without coming into contact with the latter which is not driven.
  • the driving of the driven wheel 2 resumes when the tooth 100 situated immediately after the positioning sector 101 comes into contact with the first tooth 202 of the driven wheel, after having passed opposite the tooth 204 without having interacted with it.
  • the portions of the driven wheel capable of colliding with the driving wheel 1 have a shape that makes it possible to limit the risks of damage compared to a conventional toothing with which the shocks are located at the level of the tooth tips, particularly fragile.
  • the driving wheel 1 which has fifty nine teeth is intended to be driven by a wheel thirty-one teeth advancing one step a day.
  • the driving wheel 1 takes a pitch of two teeth 100.
  • a step of the driven wheel 2 corresponds to an angular displacement of 200 teeth.
  • it is intended to truncate the teeth located on either side of the first two teeth 201 and 202.
  • the second and third teeth 203 and 204 are truncated to be disengaged from the reach of the toothing of the driving wheel 1, when the teeth 201 and 202 are disposed opposite the latter.
  • the last tooth 100 of the driving wheel, adjacent to the toothed sector 101, has moved in the counterclockwise direction of this wheel, from the vicinity of the truncated tooth 201, passing in front of the second truncated tooth 203 without driving it.
  • the toothed sector 101 has moved in front of the first truncated teeth 201 and 202 without coming into contact with them until the first tooth 100 of the driving sector of the driving wheel 1 comes into contact with it.
  • the first truncated tooth 202 as shown in Figure 1a. This latter operation takes place without rotation of the driven wheel, because of the truncation formed on the third tooth 204 so that it is located out of reach of the toothing of the driving wheel.
  • the driven wheel 2 is secured in rotation, from the point of view of a possible impact that would tend to rotate it.
  • the rotation of the driving wheel causes a displacement of the recess 103 relative to the driven wheel, which frees the passage, in rotation, for the first truncated tooth 201.
  • the third truncated tooth 204 is then positioned between the first and second teeth 100 of the drive sector, as shown in FIG. 1c, before being driven by the second of these teeth 100 and that the wheels 1 and 2 mesh with each other. conventionally by their teeth 100 and 200. It is found in this figure, that the truncated teeth 201 to 204 have a height sufficient to allow their normal drive by the teeth 100.
  • the level of the positioning sector, relative to the bottom of the teeth of the driving wheel, is such that the operation of the gear can be blocked if the positioning sector is located next to teeth 200 at one time or another cycles of rotation of the wheels 1 and 2.
  • the respective teeth of the driving and driven wheels are such that, when the toothed sector 101 of the drive wheel is arranged facing the driven wheel, the first truncated teeth 201 and 202 of the latter face him .
  • the period of rotation of the driving wheel is equal to, or is a multiple of, the period of rotation of the driven wheel.
  • the gearing being intended to be implemented in a date indication mechanism such as that shown in Figure 2, for illustrative purposes, the driven wheel is mounted coaxially and secured to a disc 20 bearing the numbers from 0 to 9, defining ten steps for the rotational movement of the disc and, provided to display the unit of the value of the date.
  • the driven wheel 2 is further secured to a star 21 which is coaxial with it and on which the end of a jumper 22 ensures the stability of certain predefined angular positions of the disc 20.
  • the latter carrying ten figures, it must perform a complete turn on itself in ten steps.
  • the star 21 comprises, for this reason, ten teeth between which it is expected that the end of the jumper comes to be housed to stabilize the ten angular positions thus defined.
  • the driven wheel 2 must have a number of teeth 200 which is a multiple of ten for a number of steps of the driven wheel corresponds to a whole number of steps of the disk 20.
  • the disc 20 has a slot 23 for effecting a visual angular indexing on the angular position of the star 21 or the driven wheel 2.
  • This indexing mark takes the form of a slot also makes it possible to use a tool adapted to adjust the angular position of the disc 20 by acting directly at the mark.
  • the driving wheel 1 is mounted coaxially and secured to a wheel of thirty-one teeth 24, or thirty-one wheel, intended to be driven by a clockwork finishing work train, by the intermediate of a clockwork.
  • the wheel of thirty-one makes a complete turn on itself in thirty-one days, advancing one step per day, usually at the end of the day. Because of its connection with the thirty-one wheel, the driving wheel also turns on itself in thirty-one days.
  • the driving sector of the driving wheel 1 has fifty nine teeth. This number indeed makes it possible to fulfill the condition, stated above, concerning the necessary multiplicity of the period of the driving wheel 1 relative to that of the driven wheel 2.
  • the driven wheel 2 is not driven by the driving wheel 1 during the passages of the thirty-first day of a given month to the first of the following month, due to the displacement without drive of the positioning sector facing the teeth of the driven wheel.
  • the date indication mechanism comprises a second disc 25 for indicating the value of the tenth of the date and for this purpose carrying the digits from 0 to 3.
  • a pinion 26 to eight teeth is mounted coaxially and secured to the disk 25 to ensure its training.
  • the pinion is arranged to mesh with a wheel
  • the tens drive wheel 27 comprises four teeth spaced apart so as to cause a rotation of a pitch of two teeth of the disk 25 during the changes. of ten of the date value, similarly to what is described in the prior art.
  • a second jumper 28 acts on the pinion 26, while a third jumper 29 acts on the thirty-one wheel 24, to ensure the positioning of their respective stable angular positions.
  • the entire mechanism that has just been described is intended to be mounted on a watch movement platen or on a complication module, in a conventional manner.
  • Fig. 3 shows, in perspective view, a second preferred embodiment of the present invention.
  • the driving sector of the driving wheel 31 has a tooth-like to edge, that is to say located outside the plane of the wheel board.
  • the operating principle of this device is identical to that described in connection with Figures 1a, 1b and 1c.
  • the positioning sector 32, toothless, of the driving wheel 31 has a free surface 33 situated at a constant intermediate level with reference to the height of the toothing, as well as in the first embodiment.
  • this free surface 33 is flat, insofar as the bottom of the teeth of the drive sector describes a ring contained in a plane parallel to the plane of the wheel plank, while it described a ribbon in the previous mode .
  • the first truncated teeth 41 and 42 of the driven wheel 40 have planar free portions 410 and 420 so as to conform to the shape of the positioning sector 32 when it is disposed opposite them.
  • the driven wheel 40 includes second and third teeth 43 and 44 truncated to a degree allowing them to be located out of reach of the teeth of the driving wheel when the first and second teeth truncated 41 and 42 are positioned opposite the driving wheel.
  • the driving wheel comprises a plurality of drive sectors separated from one another by a plurality of positioning sectors, without departing from the scope of the present invention.
  • wheel is to be interpreted in the broad sense.
  • at least one of the wheels may take the form of a pinion or a ring gear.
  • the driving wheel is a ring gear with internal teeth, the driven wheel then being located inside the driving wheel.
  • the invention is not limited to the number of teeth contributing to the gearing of the two wheels and is applicable to a gear in which one, two or more teeth of each of the wheels are involved in the transmission of the movement. .
  • the skilled person will not encounter any particular difficulty to adapt the number of truncated teeth on each wheel, and the shape of their truncations. More specifically, the latter may for example be made in such a way that the free portions 210 and 220 of the teeth 201, 202 are flat.
  • the relative heights of the toothing and the toothed sector have also been mentioned as non-limiting indicative and may be modified without departing from the scope of the present invention.
  • additional truncated teeth may be omitted according to the number of teeth contributing to the gearing, the respective dimensions of the two wheels, or the spacing provided between the wheels according to their respective dimensions, and therefore their penetration. .

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Gears, Cams (AREA)
  • Electromechanical Clocks (AREA)
EP05112645A 2005-12-21 2005-12-21 Getriebe für Uhrwerke, Mechanismus und Uhrwerk, das ein solches Getriebe umfasst Not-in-force EP1801667B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP05112645A EP1801667B1 (de) 2005-12-21 2005-12-21 Getriebe für Uhrwerke, Mechanismus und Uhrwerk, das ein solches Getriebe umfasst
ES05112645T ES2381556T3 (es) 2005-12-21 2005-12-21 Engranaje para movimiento de relojería, mecanismo y movimiento de relojería que comprende dicho engranaje
AT05112645T ATE545070T1 (de) 2005-12-21 2005-12-21 Getriebe für uhrwerke, mechanismus und uhrwerk, das ein solches getriebe umfasst

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05112645A EP1801667B1 (de) 2005-12-21 2005-12-21 Getriebe für Uhrwerke, Mechanismus und Uhrwerk, das ein solches Getriebe umfasst

Publications (2)

Publication Number Publication Date
EP1801667A1 true EP1801667A1 (de) 2007-06-27
EP1801667B1 EP1801667B1 (de) 2012-02-08

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EP05112645A Not-in-force EP1801667B1 (de) 2005-12-21 2005-12-21 Getriebe für Uhrwerke, Mechanismus und Uhrwerk, das ein solches Getriebe umfasst

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EP (1) EP1801667B1 (de)
AT (1) ATE545070T1 (de)
ES (1) ES2381556T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2985660A1 (de) 2014-08-14 2016-02-17 Rolex Sa Uhranzeigevorrichtung einer Uhrzeitanzeige oder eines abgeleiteten Uhrzeitwerts

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH310559A (fr) 1953-07-03 1955-10-31 Fontainemelon Horlogerie Pièce d'horlogerie à quantièmes.
EP1351104A1 (de) * 2002-04-02 2003-10-08 Ulysse Nardin S.A. Vorrichtung mit Programmrad für den Mechanismus eines ewigen Kalenders sowie Uhr mit solchem Mechanismus
EP1586962A2 (de) * 2004-04-14 2005-10-19 Chopard Manufacture SA Perpetual calendar mechanism

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH310559A (fr) 1953-07-03 1955-10-31 Fontainemelon Horlogerie Pièce d'horlogerie à quantièmes.
EP1351104A1 (de) * 2002-04-02 2003-10-08 Ulysse Nardin S.A. Vorrichtung mit Programmrad für den Mechanismus eines ewigen Kalenders sowie Uhr mit solchem Mechanismus
EP1586962A2 (de) * 2004-04-14 2005-10-19 Chopard Manufacture SA Perpetual calendar mechanism

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2985660A1 (de) 2014-08-14 2016-02-17 Rolex Sa Uhranzeigevorrichtung einer Uhrzeitanzeige oder eines abgeleiteten Uhrzeitwerts
US9367039B2 (en) 2014-08-14 2016-06-14 Montres Tudor SA Horology device for displaying time or time-derived information

Also Published As

Publication number Publication date
EP1801667B1 (de) 2012-02-08
ES2381556T3 (es) 2012-05-29
ATE545070T1 (de) 2012-02-15

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