EP3306417B1 - Tourbillon et horloge pourvue d'un tourbillon - Google Patents

Tourbillon et horloge pourvue d'un tourbillon Download PDF

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Publication number
EP3306417B1
EP3306417B1 EP17189774.7A EP17189774A EP3306417B1 EP 3306417 B1 EP3306417 B1 EP 3306417B1 EP 17189774 A EP17189774 A EP 17189774A EP 3306417 B1 EP3306417 B1 EP 3306417B1
Authority
EP
European Patent Office
Prior art keywords
tourbillon
bearing elements
bearing
wheel
rotation
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
EP17189774.7A
Other languages
German (de)
English (en)
Other versions
EP3306417A1 (fr
Inventor
Joachim Mutrux
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.)
Bucherer AG
Original Assignee
Bucherer AG
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 Bucherer AG filed Critical Bucherer AG
Publication of EP3306417A1 publication Critical patent/EP3306417A1/fr
Application granted granted Critical
Publication of EP3306417B1 publication Critical patent/EP3306417B1/fr
Active 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
    • G04B17/00—Mechanisms for stabilising frequency
    • G04B17/20—Compensation of mechanisms for stabilising frequency
    • G04B17/28—Compensation of mechanisms for stabilising frequency for the effect of imbalance of the weights, e.g. tourbillon
    • G04B17/285—Tourbillons or carrousels
    • 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

Definitions

  • the invention relates to the field of clocks with mechanical clockwork. It particularly concerns tourbillons.
  • Tourbillons essentially consist of a bogie on which the balance wheel, escape wheel and anchor are arranged and which rotates relative to the watch case, for example once a minute. If the bogie rotates around a single axis, it is called a single-axis tourbillon. So-called flying tourbillons, in which the bogie is only held from the underside, are particularly popular, making the sophisticated mechanics of the clockwork clearly visible from the top. This is generally used by providing the dial with a corresponding viewing window.
  • a tourbillon for a watch which has a bearing wheel forming a tourbillon bogie. This is mounted peripherally by rollers. Two of the rollers are fixed to the watch case, and the third of the rollers is attached to an arm through which it can be pivoted between two positions by turning an eccentric.
  • the object of the present invention is to create a tourbillon and a watch with a tourbillon which overcome the disadvantages of the prior art and which in particular have at least some of the advantages of a flying tourbillon without having to accept its disadvantages.
  • a tourbillon is provided with a bogie which is arranged rotatably about a tourbillon axis and which supports a balance wheel and an escapement with an escape wheel and an armature.
  • the bogie has a bearing wheel which is supported by bearing elements which act peripherally on the bearing wheel.
  • the bearing elements can attack the bearing wheel in particular from the radial outside.
  • the bearing wheel can also define an inner running surface, as a result of which the bearing elements can attack from the inside.
  • the bogie is not supported by a shaft which is attached concentrically to the tourbillon axis and in turn is supported by two bearings below the bogie or by one bearing above and below the bogie, but along the periphery of the bearing wheel, which, for example, can have a similarly large scope as the bogie as a whole.
  • unfavorable leverage forces are to be expected to a far lesser extent, and it is particularly sufficient if the bearing is only in a single axial position, so there is no need for several bearings arranged at an axial distance from one another. Therefore, the axial Dimension of the tourbillon - that is, its depth - can be reduced compared to the prior art. Overall, flatter constructions are therefore possible.
  • the bearing elements are, for example, not movable relative to the housing in the circumferential direction, but can each be rotated about an axis of rotation, as a result of which the bearing wheel rolls on the bearing elements when the bogie rotates.
  • the bearing elements can, for example, be ball bearing elements (i.e. have a ball bearing, for example by forming a ball bearing).
  • Such have, for example, an inner ring fixed to the housing, an outer roller and a plurality of balls between the ring and the roller, whereby the roller can rotate with little resistance relative to the ring.
  • bearing elements which are arranged approximately evenly distributed in the circumferential direction.
  • At least one of the bearing elements is resiliently arranged, i. E. it is pressed against the peripheral running surface of the bearing wheel due to a spring force.
  • one of the bearing elements can be mounted on a rocker which is pivotable about a rocker axis and on which a spring acts so that the bearing element is pressed against the running surface.
  • the resilient arrangement of a bearing element can absorb the energy generated in the event of impacts and also has a compensating effect.
  • bearing elements in particular two of them can be fixed to the housing and one can be arranged resiliently in radial directions.
  • bearing elements are also not excluded.
  • Four, five or even more bearing elements can also be used, in which case, for example, several of the bearing elements can be arranged in a resilient manner.
  • bearing elements can also be used, for example rollers, which in turn are supported by slide bearings, or the bearing elements can themselves be designed as slide bearings, for example as ruby bearings.
  • the bearing elements can also be designed as balls or rollers that are guided in a corresponding groove in the housing or a base, so that the bogie as a whole part can be understood as a roller (inner or possibly outer ring) of a ball bearing. It is only important that storage from the periphery is possible and that the friction losses are not too great.
  • the bearing wheel forms a peripheral, radially outer or possibly inner running surface on which the bearing elements act.
  • the running surface can be designed in such a way that it has no structure in the circumferential direction, but is smooth, i.e. that it is constant as a function of the azimuth angle and in particular has no teeth or the like.
  • the running surface can, however, form a circumferential groove or circumferential tongue which cooperates with a complementary structure of the bearing elements in order to fix the bogie in the axial direction.
  • the design and dimensioning of the complementary structure of the bearing elements can differ from the structure of the running surface in such a way that, in general, only two contact points are formed per bearing element. This can be brought about, for example, in that the respective groove in the area of contact with the element (roller; spring) engaging in it has no curvature or a lesser curvature than the corresponding surface of the engaging element.
  • the running surface of the bearing wheel is in particular arranged peripherally with respect to the whole bogie, i. E. the running surface can essentially form an outermost surface of the entire bogie.
  • the diameter of the bearing wheel or the diameter of the running surface can, for example, correspond to the diameter of the bogie or at least 70% or at least 80% of this diameter.
  • the tourbillon will generally also have a bogie gear on which a drive wheel of the rest of the clockwork engages and via which the latter decreases the rotary movement of the tourbillon and thus the time information.
  • This can - as known per se - also form a peripheral surface of the bogie.
  • the bogie gear can also have internal teeth.
  • the bearing wheel and the bogie gear are generally designed to be non-rotatable relative to one another. Bearing wheel and bogie gear wheel - and possibly other elements of the bogie - can also be integral with one another, i.e. be formed by one and the same element.
  • the tourbillon can furthermore have a base on which the bearing elements or at least the non-resilient bearing elements are mounted.
  • a base can be built into the case of the watch, for example by screwing.
  • the tourbillon as a whole can thus form a module that is manufactured as a whole and built into the case.
  • Such a base can also have a toothing fixed to the housing, in which a pinion coupled to the escape wheel engages in order to drive it due to the rotary movement of the tourbillon.
  • a watch according to the invention in particular a wrist or pocket watch, which, in addition to a tourbillon of the type described, has further movement parts, in particular a spring housing or the like as an energy store, and a gear train for transmitting the drive force from the energy store to the tourbillon and for reducing the rotary movement of the tourbillon, and display means (pointer, dial) for displaying the time, for which a pointer mechanism can also be present in a manner known per se.
  • display means pointer, dial
  • the gear train can in particular have a drive wheel that meshes with the bogie gear.
  • the dial can have a viewing window through which the tourbillon is at least partially visible. Because of the flying arrangement according to the invention, the user sees a great deal of the mechanics, and yet the entire clockwork can be very flat and therefore the clock can be correspondingly elegant.
  • Figure 1 shows a tourbillon 1 mounted on a base 12 fixed to the housing.
  • the tourbillon 1 has a bogie which rotates relative to the housing about a tourbillon axis 20, for example at one revolution per minute.
  • the bogie can serve as a second hand, or such a hand can be coupled to the bogie.
  • the details of the time display are not essential to the invention and are not described further in this text.
  • the bogie In addition to a bogie platform 2, the bogie has a balance bridge 5 fastened to it with two fastening pins 6. Between the bogie platform 2 and the balance bridge 5, a balance shaft of the balance 3 is mounted, in the embodiment shown coaxially with the tourbillon axis 20.
  • the escape wheel 8 drives the vibration system via the armature and rotates in the process per oscillation by an angle of rotation given by the distance between the escape wheel teeth.
  • the escape wheel 8 is driven in that an in Fig. 1
  • the escape wheel pinion which is not visible and is coupled to the escape wheel, engages in a toothing 9 fixed to the housing and thus rolls on this toothing 9 due to the rotation of the bogie on which the escape wheel is mounted.
  • the toothing 9 fixed to the housing is formed on that disk which also forms the base.
  • the base and / or the toothing fixed to the housing could, however, also be formed by the watch housing itself.
  • the bogie in turn is driven by a drive wheel, which can be understood as a second fourth wheel, which is shown in Fig. 1 is not visible and which, for example, in an in Figure 1 clearly visible external toothing 15 of the bogie platform 2 engages.
  • a drive wheel which can be understood as a second fourth wheel, which is shown in Fig. 1 is not visible and which, for example, in an in Figure 1 clearly visible external toothing 15 of the bogie platform 2 engages.
  • the bogie platform 2 forms an outer, peripheral running surface 11.
  • the bogie platform also has a bogie bearing wheel 22 with the peripheral running surface 11 below a bogie gear 21, which has the external toothing 15, for this purpose .
  • Ball bearing elements 13, which are fastened to the base 12, are arranged radially outside this.
  • the ball bearing elements have an outer roller on which the running surface 11 rolls when the bogie rotates. In total there are exactly three of the ball bearing elements 13 and they are distributed at least approximately evenly in the circumferential direction.
  • Figure 2 shows a schematic cross section through an outer roller of a ball bearing element 13 and through the peripheral area of the bogie platform. Because the bogie platform 2 forms a groove on its periphery, in which the roller engages - the running surface 11 is overall approximately V-shaped in cross-section - the ball bearing element 13 supports the bogie platform and secures its axial and radial position. The bogie platform 2 is suspended by the three ball bearing elements 13, that is, suspended. In the present example, due to the approximately V-shaped configuration of the groove which forms the running surface 11 and the convex shape of the roller, there are two contact points per ball bearing element, whereby the resistance is minimized.
  • the running surface can also have a projection 25 which engages in a corresponding groove of the ball bearing element 13, which is shown in FIG Figure 3 is shown schematically.
  • the principle of axial and radial bearings works in the same way.
  • the running surface can be coated with an abrasion-resistant material that minimizes rolling friction, for example Diamond Like Carbon (DLC).
  • DLC Diamond Like Carbon
  • the materials used can be metals or composite materials, in particular special plastics, or ceramics, which per se are considered suitable for the purpose described, e.g. high-quality steels, titanium alloys, etc.
  • the running surface can be an inner running surface, ie the bearing wheel forms a peripheral circumferential ring, on the inside of which the running surface is formed, and the bearing elements grip the running surface from the inside.
  • Figure 4 shows a detail of a top view of a clock whose dial has a window 30 through which the clockwork and in particular the tourbillon is partially visible.
  • the drive wheel 41 as well as other gears of the clockwork that interact with it, through which the drive energy is transmitted from a spring (not shown) to the drive wheel and the rotary movement of the bogie is reduced to drive the minute and hour hands forward as well as to check one or more complications (date display etc.) if necessary.
  • Figure 4 also shows the possibility of providing, in addition to two permanently mounted ball bearing elements 13.1, a ball bearing element 13.2 which is resiliently mounted relative to the housing.
  • the resiliently mounted ball bearing element 13.2 is pressed against the running surface 11 by a resiliently mounted rocker 44.
  • This type of suspension can absorb energy generated by impacts and has a compensatory effect, for example, in the event of different thermal expansions.
  • a pivot pin 46 and a spring 45 are provided, which press the ball bearing element against the running surface 11.
  • the tourbillon 1 according to Figure 1 can be manufactured as a module including the base and can be inserted into a case of the watch, for which in addition to the ball bearing elements an in Fig. 1 visible screw hole can serve. All that is required is a single mechanical interface to the other components of the movement, and this is formed on the tourbillon side by the bogie gear.
  • the invention has been described using a single-axis tourbillon. However, it can also be used for multi-axis tourbillons with appropriate adjustments.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Rolling Contact Bearings (AREA)

Claims (14)

  1. Tourbillon (1) doté d'un bâti rotatif qui est disposé à rotation autour un axe de tourbillon et qui monte un balancier (3) et un échappement doté d'une roue d'ancre (8) et d'un ancre, le bâti rotatif présentant une roue de palier (22) montée à l'aide d'éléments de palier (13) engageant la périphérie d'une surface de roulement (11) de la roue de palier, caractérisé en ce que
    au moins l'un des éléments de palier est disposé de manière radialement élastique.
  2. Tourbillon selon la revendication 1, dans lequel la surface de roulement (11) forme une partie extérieure de surface et les éléments de palier (13) engagent la roue de palier radialement à l'extérieur.
  3. Tourbillon selon les revendications 1 ou 2, dans lequel les éléments de palier (13) ont une position fixe dans la direction périphérique mais peuvent tourner chacun autour d'un axe de rotation, la roue de palier (22) roulent sur les éléments de palier lorsque le bâti rotatif est en rotation.
  4. Tourbillon selon la revendication 3, dans lequel chacun des éléments de palier (13) présente un palier sphérique.
  5. Tourbillon selon la revendication 3, dans lequel chacun des éléments de palier (13) présente un galet monté à coulissement.
  6. Tourbillon selon les revendications 1 ou 2, dans lequel les éléments de palier forment un palier coulissant.
  7. Tourbillon selon les revendications 1 ou 2, dans lequel les éléments de palier sont mobiles dans la direction périphérique et sont formés de manière à pouvoir rouler, par exemple comme sphères.
  8. Tourbillon selon l'une des revendications précédentes, présentant exactement trois éléments de palier (13).
  9. Tourbillon selon l'une des revendications précédentes, dans lequel la surface de roulement (11) forme une rainure et les éléments de palier (13) s'engagent dans la rainure de manière à former un guidage axial et radial.
  10. Tourbillon selon l'une des revendications 1 à 8, dans lequel la surface de roulement (11) forme un ressort et les éléments de palier (13) présentent une rainure dans laquelle une saille (25) s'engage de manière à former un guidage axial et radial.
  11. Tourbillon selon l'une des revendications précédentes, présentant une roue dentée (21) de bâti rotatif, sur laquelle s'engage une roue d'entraînement du reste du mécanisme d'horlogerie, par l'intermédiaire de laquelle cette dernière reçoit le déplacement de rotation du bâti rotatif et donc une information de temps, la roue dentée de bâti rotatif étant reliée à rotation solidaire avec la roue de palier (22) et étant disposée axialement au-dessus ou en dessous de cette dernière.
  12. Tourbillon selon l'une des revendications précédentes, présentant une base (12) pouvant être montée fixement sur le boîtier et dotée d'une denture (9) fixe sur le boîtier, dans laquelle s'engage un pignon couplé à la roue d'ancre (8) pour entraîner cette dernière lorsque le bâti rotatif se déplace en rotation.
  13. Tourbillon selon l'une des revendications précédentes, présentant une base (12) pouvant être montée fixement sur le boîtier, au moins un des éléments de palier (13) étant monté sur la base.
  14. Pièce d'horlogerie, notamment montre-bracelet ou montre de poche, présentant un tourbillon (1) selon l'une des revendications précédentes, ainsi qu'un accumulateur d'énergie et qu'un mécanisme à roues qui transmet une force d'entraînement de l'accumulateur d'énergie au tourbillon et qui soutient le déplacement de rotation du bâti rotatif, ainsi que des moyens d'affichage qui affichent l'heure.
EP17189774.7A 2016-09-23 2017-09-07 Tourbillon et horloge pourvue d'un tourbillon Active EP3306417B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH001245/2016A CH712973B1 (de) 2016-09-23 2016-09-23 Tourbillon und Uhr mit Tourbillon.

Publications (2)

Publication Number Publication Date
EP3306417A1 EP3306417A1 (fr) 2018-04-11
EP3306417B1 true EP3306417B1 (fr) 2020-09-30

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ID=57233255

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17189774.7A Active EP3306417B1 (fr) 2016-09-23 2017-09-07 Tourbillon et horloge pourvue d'un tourbillon

Country Status (8)

Country Link
US (1) US10481557B2 (fr)
EP (1) EP3306417B1 (fr)
JP (1) JP7022546B2 (fr)
KR (1) KR102480836B1 (fr)
CN (1) CN107870549B (fr)
CH (1) CH712973B1 (fr)
SG (1) SG10201707656YA (fr)
TW (1) TWI743189B (fr)

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JP1610646S (fr) * 2017-09-14 2018-08-06
EP3579058B1 (fr) * 2018-06-07 2021-09-15 Montres Breguet S.A. Piece d'horlogerie comprenant un tourbillon
EP3599515B1 (fr) * 2018-07-24 2022-07-06 Harry Winston SA Mecanisme d'entrainement d'horlogerie
EP3599516B1 (fr) * 2018-07-24 2024-04-03 Harry Winston SA Tourbillon ou carrousel retrograde d'horlogerie
EP3599517B1 (fr) * 2018-07-24 2021-03-10 Harry Winston SA Tourbillon ou carrousel rétrogradé d'horlogerie
EP3770695B1 (fr) * 2019-07-23 2022-01-12 Omega SA Stop-cage d'horlogerie a lame d'arrêt de cage

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Also Published As

Publication number Publication date
CH712973B1 (de) 2023-12-29
CN107870549B (zh) 2021-10-22
CH712973A1 (de) 2018-03-29
TW201826050A (zh) 2018-07-16
US20180088531A1 (en) 2018-03-29
TWI743189B (zh) 2021-10-21
CN107870549A (zh) 2018-04-03
SG10201707656YA (en) 2018-04-27
US10481557B2 (en) 2019-11-19
EP3306417A1 (fr) 2018-04-11
KR102480836B1 (ko) 2022-12-23
JP7022546B2 (ja) 2022-02-18
KR20180033067A (ko) 2018-04-02
JP2018049013A (ja) 2018-03-29

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