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EP2977829B1 - Anordnung mit beweglichem Bremselement einer Uhr - Google Patents

Anordnung mit beweglichem Bremselement einer Uhr Download PDF

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Publication number
EP2977829B1
EP2977829B1 EP14178403.3A EP14178403A EP2977829B1 EP 2977829 B1 EP2977829 B1 EP 2977829B1 EP 14178403 A EP14178403 A EP 14178403A EP 2977829 B1 EP2977829 B1 EP 2977829B1
Authority
EP
European Patent Office
Prior art keywords
wheel assembly
brake wheel
elastic return
return means
brake
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
EP14178403.3A
Other languages
English (en)
French (fr)
Other versions
EP2977829A1 (de
Inventor
Raphaël Courvoisier
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.)
ETA SA Manufacture Horlogere Suisse
Original Assignee
ETA SA Manufacture Horlogere Suisse
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 ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to EP14178403.3A priority Critical patent/EP2977829B1/de
Priority to CH01137/14A priority patent/CH709920A2/fr
Priority to US14/799,749 priority patent/US9529328B2/en
Priority to JP2015144643A priority patent/JP6014729B2/ja
Priority to CN201510437107.7A priority patent/CN105319943B/zh
Publication of EP2977829A1 publication Critical patent/EP2977829A1/de
Priority to HK16109421.2A priority patent/HK1221290A1/zh
Application granted granted Critical
Publication of EP2977829B1 publication Critical patent/EP2977829B1/de
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
    • G04B35/00—Adjusting the gear train, e.g. the backlash of the arbors, depth of meshing of the gears
    • 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
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G04B13/021—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft
    • 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
    • G04B13/021—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft
    • G04B13/022—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft with parts made of hard material, e.g. silicon, diamond, sapphire, quartz and the like
    • 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
    • G04B13/021—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft
    • G04B13/023—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft allowing rotational slipping when a threshold torque is exceeded
    • 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
    • G04B13/025—Wheels; Pinions; Spindles; Pivots with elastic means between the toothing and the hub of a toothed wheel
    • 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

Definitions

  • the invention relates to a mobile watchmaking assembly, comprising a shaft having a first surface cooperating in pivotal guidance with a second surface of a wheel pivotally mounted on said shaft, wherein said first surface or respectively said second surface comprises at least one braking surface that comprises at least one shoe subjected to the action of at least one first elastic return means, integral with said shaft or said wheel, and arranged to exert a radial force with respect to said axis of pivoting on said second surface or said first surface respectively.
  • the invention also relates to a clockwork mechanism comprising at least one such mobile braking assembly.
  • the invention also relates to a timepiece comprising at least one such mobile braking assembly.
  • the invention relates to the field of watch mechanisms, and more particularly the wheels.
  • the invention proposes to deal with the problem of angular gaps in a wheel, in particular an unstressed wheel, by the use of friction.
  • the invention relates to a mobile watchmaking assembly, comprising a shaft having a first surface cooperating in pivotal guidance with a second surface of a wheel pivotally mounted on said shaft, wherein said first surface or respectively said second surface comprises at least one braking surface that comprises at least one first arm subjected to the action of at least one first elastic return means, integral with said shaft or said wheel respectively, and arranged to exert a radial force by relative to said pivot axis on said second surface or respectively said first surface, characterized in that said movable braking assembly comprises intrinsic means of adjustment by discrete values of the friction exerted by said braking surface on said second surface or respectively said first surface.
  • said first surface or said second surface respectively comprises, distinct from each other, on the one hand at least one guide surface according to a predetermined clearance, around a pivot axis, said second surface or respectively said first surface, and secondly at least one said braking surface.
  • the invention also relates to a clockwork mechanism comprising at least one such mobile braking assembly.
  • the invention also relates to a timepiece comprising at least one such mobile braking assembly.
  • the invention relates more particularly to the field of clockwork.
  • the invention relates to a mobile brake assembly 1 clock, comprising a shaft 2 and a wheel 5 pivotally mounted on the shaft 2.
  • the shaft 2 comprises a first surface 3, which cooperates in pivotal guiding with a second surface 4 of the wheel 5.
  • the first surface 3 or the second surface 4 comprises at least one braking surface 11 carried by at least one first braking arm 30 subjected to the action of at least one first elastic return means 13.
  • This first return means elastic 13 is preferably integral with the shaft 2 or the wheel 5, and is arranged to exert a radial force by relative to the pivot axis D on the second surface 4 or respectively the first surface 3.
  • the first elastic return means 13 is advantageously a flexible blade, more flexible than the shoe 12, which is cantilevered at a distal end of this blade, in the manner of a hammer head on its handle, the end of the flexible blade opposite the shoe being embedded in the corresponding structure, here the structure of the wheel 5 in the cases illustrated by the Figures 1 to 4 .
  • this assembly 1 comprises intrinsic adjustment means 14 by discrete values of the friction exerted by the braking surface 11 on the second surface 4, or respectively the first surface 3.
  • the first surface 3 or respectively the second surface 4 comprises, distinct from one another, on the one hand at least one guide surface 10 according to a predetermined clearance J, about a pivot axis D, of the second surface 4 or respectively the first surface 3, and secondly at least one such braking surface 11, that comprises at least one shoe 12, at the distal end of a first arm 30, subjected to the action of at least less than a first elastic return means 13.
  • This first elastic return means 13 is preferably integral with the shaft 2 or the wheel 5, and is arranged to exert a radial force with respect to the pivot axis D on the second surface 4 or the first surface 3.
  • these intrinsic adjustment means 14 comprise at least one bearing surface 18, which is arranged to cooperate in thrust support with a complementary bearing surface 17 that the shoe 12 has on the side opposite to the braking surface 11.
  • the Figures 1 to 3 show in particular intrinsic adjustment means 14 which comprise at least one second flexible arm 19 carrying such a bearing surface 18.
  • This second arm 19 is, or as on the figure 3 radially limited relative to the pivot axis D opposite it in abutment against an adjusting device 20 arranged to occupy one of a plurality of discrete positions relative to the shaft 2 (or respectively to wheel 5), or as on the Figures 1 and 2 recalled to the complementary bearing surface 17 of the shoe 12 by a second elastic return means 16.
  • the Figures 1 and 2 illustrate a movable braking assembly 1 where the second arm 19 is biased towards the complementary bearing surface 17 of the shoe 12 by the second elastic return means 16.
  • This second arm 19 comprises at least one finger 15 (or respectively a notch), subjected to the return action of the second resilient return means 16 and arranged to cooperate with only one of a plurality of notches 23 that includes the shaft 2 or respectively the wheel 5, in this case the wheel 5 in the case of the figures, each said notch 23 corresponding to a different friction setting value.
  • the Figures 1 and 2 show a series of notches 23 similar to a comb or a toothing, arranged to maintain the position of the finger 5 after its operation.
  • the second elastic return means 16 is advantageously a flexible blade, more flexible than the finger 15, which is cantilevered at a distal end of this blade, in the manner of a hammer head on its handle, the end of the flexible blade opposite the finger being embedded in the corresponding structure, here the structure of the wheel 5 in the cases illustrated by the figures.
  • the shoe 12 is subjected to both the action of at least one first elastic return means 13 and to the action of the second elastic return means 16.
  • the second elastic return means 16 may constitute a simple limit stop for the shoe 12, whose complementary bearing surface 17 then comes into simple support on the bearing surface 18 of the second arm 19, as visible on the figure 1 in this case, the second elastic return means 18 serves essentially to adjust the friction, allowing movement of the finger 15 and placing it in cooperation with a notch 23 selected for a particular value of friction.
  • the figure 2 shows that the second elastic return means 16 can also be used to make its own contribution to the friction, by the exercise of a radial centripetal force F on the shoe 12.
  • the torque exerted on the shoe 12 by the first elastic return means 13 is greater than that exerted by the second elastic return means 16.
  • the second elastic return means 16 is integral with the shaft 2 or respectively the wheel 5, here the wheel 5 in the case of the figures.
  • the second arm 19 is limited radially with respect to the pivot axis D, opposite it, in abutment abutment on an adjusting device 20, which comprises an eccentric adjustment by discrete positions, by example by the use of an eccentric 21 pivoting on the wheel 5, on which it can be stopped in different angular positions, by a notch or the like.
  • the forms of the elastic return means, hooves, arms, and notches, can be very diverse.
  • the figure 4 thus illustrates a third embodiment, with a plurality of curved arms and blades substantially concentric with the shaft 2.
  • the figure 5 illustrates a fourth embodiment, with two arms 30, which are not cantilevered like those of Figures 1 to 4 , but stretched on the serge of the wheel 5 between attachment points 51, 52, 53, 54, and pinching together the shaft 2, each of these arms 30 being subjected to a centripetal radial thrust force exerted by second elastic return means 16 incorporated in the wheel 5.
  • the shaft 2 is then guided by two braking surfaces 11, and there is no area reserved for guiding, as the guide surfaces 4 of the other embodiments.
  • the arrangement of the intrinsic adjustment means 14 is similar to that of the other embodiments presented above. Naturally this variant can be declined with a number of upper arms.
  • the assembly 1 may comprise a plurality of braking surfaces 11, in particular distributed in a balanced manner about the pivot axis D.
  • the wheel 5 is made of monocrystalline or polycrystalline silicon, or a similar material implemented by a photolithographic process, or "MEMS" or “LIGA”, or the like.
  • the shaft 2 is made of ruby.
  • the movable braking assembly 1 consists solely of two components which are the shaft 2 and the wheel 5. And this shaft 2 and this wheel 5 are each a one-piece component comprising all the surfaces of necessary support, as well as the means of recall and maintenance required.
  • the shaft 2 is fixedly mounted on a plate or a bridge that comprises a mechanism 100 or a clockwork movement in which is integrated the movable braking assembly 1 considered.
  • the invention also relates to a clockwork mechanism 100, in particular a movement, comprising at least one such movable braking assembly 1.
  • the invention also relates to a timepiece 200 comprising at least one such movable braking assembly 1.
  • the setting of the brake arming makes it possible to modify the frictional force (or torque) exerted on the shaft, in a reproducible manner, which facilitates and speeds up the adjustments.
  • the invention makes it possible to reduce the number of components compared to a traditional mechanism, in order to reduce the gear sets (still visible on the display at the level of the needles), which goes in the direction of improved reliability, and a reduction in costs, especially since a manufacturing by cutting is possible.
  • the invention reduces wear compared to traditional spring brakes.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Braking Arrangements (AREA)

Claims (15)

  1. Uhrenbaugruppe (1) mit Bremsdrehteil, umfassend eine Welle (2), die eine erste Oberfläche (3), die mit einer zweiten Oberfläche (4) eines an der Welle (2) drehbar montierten Rades (5) für eine Drehführung zusammenwirkt, aufweist, wobei die erste Oberfläche (3) oder entsprechend die zweite Oberfläche (4) mindestens eine Bremsoberfläche (11) aufweist, die von mindestens einem ersten Bremsarm (30) getragen wird, der der Einwirkung mindestens eines ersten, einteilig mit der Welle (2) oder entsprechend mit dem Rad (5) ausgebildeten elastischen Rückstellmittels (13) unterliegt und dafür ausgelegt ist, eine radiale Kraft in Bezug auf die Drehachse (D) auf die zweite Oberfläche (4) oder entsprechend auf die erste Oberfläche (3) auszuüben, dadurch gekennzeichnet, dass die Baugruppe (1) mit Bremsdrehteil Eigeneinstellmittel (14) mit diskreten Werten der Reibung, die durch die Bremsoberfläche (11) auf die zweite Oberfläche (4) oder entsprechend auf die erste Oberfläche (3) ausgeübt wird, umfasst.
  2. Uhrenbaugruppe (1) mit Bremsdrehteil nach Anspruch 1, dadurch gekennzeichnet, dass die erste Oberfläche (3) oder entsprechend die zweite Oberfläche (4) einerseits mindestens eine Führungsoberfläche (10) mit einem vorgegebenen Spiel um eine Drehachse (D) der zweiten Oberfläche (4) oder entsprechend der ersten Oberfläche (3) und andererseits mindestens eine solche Bremsoberfläche (11), die voneinander verschieden sind, umfasst.
  3. Uhrenbaugruppe (1) mit Bremsdrehteil nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Eigeneinstellmittel (14) eine Abstützoberfläche (18)aufweisen, die dafür ausgelegt ist, durch Druckabstützung mit einer komplementären Abstützoberfläche (17), die der Schuh (12) auf der der Bremsoberfläche (11) gegenüberliegenden Seite aufweist, zusammenzuwirken.
  4. Uhrenbaugruppe (1) mit Bremsdrehteil nach Anspruch 3, dadurch gekennzeichnet, dass die Eigeneinstellmittel (14) mindestens einen zweiten biegsamen Arm (19) umfassen, der die Abstützoberfläche (18) trägt, wobei der zweite Arm (19) entweder in Bezug auf die Drehachse (D) radial eingeschränkt ist durch anliegende Abstützung an einer dieser gegenüberliegenden Einstellvorrichtung, die dafür ausgelegt ist, eine von einer Mehrzahl von diskreten Positionen in Bezug auf die Welle (2) oder entsprechend auf dem Rad (5) einzunehmen, oder zu der komplementären Abstützoberfläche (17) des Schuhs (12) durch ein zweites elastisches Rückstellmittel (16) zurückgestellt wird.
  5. Uhrenbaugruppe (1) mit Bremsdrehteil nach Anspruch 4, dadurch gekennzeichnet, dass der zweite Arm (19) zu der komplementären Abstützoberfläche (17) des Schuhs (12) durch das zweite elastische Rückstellmittel (16) zurückgestellt wird und mindestens einen Finger (15) oder entsprechend eine Kerbe aufweist, der/die der Rückstellwirkung des zweiten elastischen Rückstellmittels (16) unterliegt und dafür ausgelegt ist, jeweils mit einer einzigen von einer Mehrzahl von Kerben (23), die jeweils die Welle (2) oder entsprechend das Rad (5) aufweist, zusammenzuwirken, wobei jede solche Kerbe (23) einem unterschiedlichen Reibungseinstellwert entspricht.
  6. Uhrenbaugruppe (1) mit Bremsdrehteil nach Anspruch 5, dadurch gekennzeichnet, dass der Schuh (12) sowohl der Wirkung mindestens eines ersten elastischen Rückstellmittels (13) als auch der Wirkung des zweiten elastischen Rückstellmittels (16) unterliegt.
  7. Uhrenbaugruppe (1) mit Bremsdrehteil nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass das zweite elastische Rückstellmittel (16) jeweils mit der Welle (2) oder entsprechend mit dem Rad (5) einteilig ausgebildet ist.
  8. Uhrenbaugruppe (1) mit Bremsdrehteil nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, dass das Drehmoment, das durch das erste elastische Rückstellmittel (13) auf den Schuh (12) ausgeübt wird, größer als jenes ist, das durch das zweite elastische Rückstellmittel (16) ausgeübt wird.
  9. Uhrenbaugruppe (1) mit Bremsdrehteil nach Anspruch 4, dadurch gekennzeichnet, dass der zweite Arm (19) in Bezug auf die Drehachse (D) radial eingeschränkt ist durch anliegende Abstützung an der dieser gegenüberliegenden Einstellvorrichtung (20), die eine Exzenterverstellung mit diskreten Positionen umfasst.
  10. Uhrenbaugruppe (1) mit Bremsdrehteil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Rad (5) aus monokristallinem oder polykristallinem Silizium hergestellt ist.
  11. Uhrenbaugruppe (1) mit Bremsdrehteil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Welle (2) aus Rubin hergestellt ist.
  12. Uhrenbaugruppe (1) mit Bremsdrehteil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie ausschließlich aus zwei Komponenten, die die Welle (2) und das Rad (5) sind, gebildet ist.
  13. Uhrenbaugruppe (1) mit Bremsdrehteil nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Welle (2) an einer Platine oder einer Brücke fest montiert ist, die ein Uhrenmechanismus (100) oder ein Uhrwerk, in den/das die Baugruppe (1) mit Bremsdrehteil integriert ist, umfasst.
  14. Uhrenmechanismus (100), umfassend mindestens eine Baugruppe (1) mit Bremsdrehteil nach einem der vorhergehenden Ansprüche.
  15. Zeitmessgerät (200), umfassend mindestens eine Baugruppe (1) mit Bremsdrehteil nach einem der Ansprüche 1 bis 13.
EP14178403.3A 2014-07-24 2014-07-24 Anordnung mit beweglichem Bremselement einer Uhr Active EP2977829B1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP14178403.3A EP2977829B1 (de) 2014-07-24 2014-07-24 Anordnung mit beweglichem Bremselement einer Uhr
CH01137/14A CH709920A2 (fr) 2014-07-24 2014-07-24 Ensemble à mobile de freinage d'horlogerie.
US14/799,749 US9529328B2 (en) 2014-07-24 2015-07-15 Timepiece brake wheel assembly
JP2015144643A JP6014729B2 (ja) 2014-07-24 2015-07-22 時計用制動ホイールアセンブリ
CN201510437107.7A CN105319943B (zh) 2014-07-24 2015-07-23 钟表制动轮组件
HK16109421.2A HK1221290A1 (zh) 2014-07-24 2016-08-08 鐘錶制動輪組件

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14178403.3A EP2977829B1 (de) 2014-07-24 2014-07-24 Anordnung mit beweglichem Bremselement einer Uhr

Publications (2)

Publication Number Publication Date
EP2977829A1 EP2977829A1 (de) 2016-01-27
EP2977829B1 true EP2977829B1 (de) 2017-07-12

Family

ID=51220480

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14178403.3A Active EP2977829B1 (de) 2014-07-24 2014-07-24 Anordnung mit beweglichem Bremselement einer Uhr

Country Status (6)

Country Link
US (1) US9529328B2 (de)
EP (1) EP2977829B1 (de)
JP (1) JP6014729B2 (de)
CN (1) CN105319943B (de)
CH (1) CH709920A2 (de)
HK (1) HK1221290A1 (de)

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EP2977829A1 (de) 2016-01-27
HK1221290A1 (zh) 2017-05-26
JP6014729B2 (ja) 2016-10-25
CN105319943B (zh) 2017-10-17
CN105319943A (zh) 2016-02-10
US9529328B2 (en) 2016-12-27
JP2016024201A (ja) 2016-02-08
US20160026154A1 (en) 2016-01-28
CH709920A2 (fr) 2016-01-29

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