EP1437633B1 - Räderwerk eines Chronographes - Google Patents

Räderwerk eines Chronographes Download PDF

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Publication number
EP1437633B1
EP1437633B1 EP03000257A EP03000257A EP1437633B1 EP 1437633 B1 EP1437633 B1 EP 1437633B1 EP 03000257 A EP03000257 A EP 03000257A EP 03000257 A EP03000257 A EP 03000257A EP 1437633 B1 EP1437633 B1 EP 1437633B1
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EP
European Patent Office
Prior art keywords
wheel
teeth
chronograph
intermediate wheel
gear train
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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.)
Expired - Lifetime
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EP03000257A
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English (en)
French (fr)
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EP1437633A1 (de
Inventor
Pierre-Maurice Rochat
Michel Belot
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Patek Philippe SA Geneve
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Patek Philippe SA Geneve
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Priority to DE60307035T priority Critical patent/DE60307035T2/de
Priority to EP03000257A priority patent/EP1437633B1/de
Publication of EP1437633A1 publication Critical patent/EP1437633A1/de
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Publication of EP1437633B1 publication Critical patent/EP1437633B1/de
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    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
    • 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
    • G04B13/027—Wheels; Pinions; Spindles; Pivots planar toothing: shape and design

Definitions

  • the present invention relates to a chronograph wheel.
  • the intermediate wheel can take an engaged position in which it meshes with the chronograph wheel to transmit to the latter the movement of the driving wheel, and a disengaged position in which its meshing with the chronograph wheel is broken, which is then immobilized by a brake.
  • the clutch / clutch is effected by means of a rocker connected to the intermediate wheel and controlled by the pushbutton of the chronograph.
  • the chronograph wheel is constantly slightly braked by a friction spring.
  • Figures 1 and 2 show, respectively in an engaged state and a disengaged state, a chronograph wheel constituted by the three aforementioned wheels.
  • the driving wheel is designated by the reference R1, the intermediate wheel by the R2 mark and the chronograph wheel by the reference R3.
  • the teeth of the intermediate wheel and the chronograph wheel have a triangular shape. The angle at the top of these teeth is large enough to minimize the play of meshing and small enough to avoid too much friction.
  • the teeth of the driving wheel are generally of triangular shape or, as shown, of epicycloidal shape.
  • the chronograph wheel In order to reduce the risk of inadvertent jumping of the chronograph hand during clutching, the chronograph wheel generally carries a number of teeth twice that of the intermediate wheel. A tooth tip of the intermediate wheel is thus more likely to meet an empty space between two consecutive teeth of the chronograph wheel when it enters the teeth of the chronograph wheel. This solution certainly provides an improvement but only reduces the risk of accidental jump in a limited way.
  • the present invention aims in the first place to eliminate or at least reduce the risk of unwanted recoil of the chronograph hand during clutch.
  • a chronograph wheel comprising a first wheel, an intermediate wheel permanently engaged with the first wheel and comprising an intermediate wheel, and a third wheel located substantially in the same plane as the intermediate wheel, one first and third wheels being a driving wheel and the other a chronograph wheel intended to be connected to a chronograph hand, the gear train being able to assume an engaged position in which the intermediate wheel meshes with the third wheel and a disengaged position in which the meshing between the intermediate wheel and the third wheel is broken, each tooth of the intermediate wheel, respectively of the third wheel, having a so-called “active” side intended to cooperate with the toothing of the third wheel, respectively of the intermediate wheel , when the gear train is in the engaged position and an opposite side called “inactive”, characterized in that that the teeth of the intermediate wheel and the third wheel are shaped so that, at a given moment during the clutch, the radial axis of any of the teeth of the intermediate wheel and the radial axis of any of the teeth of the third wheel are merged with the
  • the present invention aims secondly to improve the quality of the meshing between the intermediate wheel and the third wheel.
  • the chronograph wheel according to the invention is characterized in that the profile of the active side of the teeth of the intermediate wheel is convex at least in the portion of these teeth intended to cooperate with the toothing of the third wheel and / or in that the profile of the active side of the teeth of the third wheel is convex at least in the portion of these teeth intended to cooperate with the toothing of the intermediate wheel.
  • the present invention also relates to a chronograph incorporating the wheel as defined above.
  • the driving wheel RM is integral with the work train (not shown), more particularly the seconds wheel, and thus rotates continuously in the direction indicated by the arrow F1 by traveling one revolution per minute.
  • the RC chronograph wheel carries the chronograph hand (not shown).
  • the intermediate wheel RI meanwhile, is in permanent engagement with the driving wheel RM and can take an engaged position ( Figure 4) in which it also meshes with the chronograph wheel RC to transmit to it the movement of the wheel driving RM and a disengaged position ( Figure 5) in which its meshing with the RC chronograph wheel is broken.
  • the clutch / clutch that is to say the passage from the disengaged position to the engaged position and vice versa, is performed by means of a rocker B, under the control of the push button (not shown) of the chronograph operated. manually by the user.
  • the chronograph wheel RC is constantly under the action of a friction spring (not shown), which exerts on this wheel a slight braking to catch the gear sets between the wheels RM and Rl on the one hand and the Rl and RC wheels on the other hand and thus reduce the fidelity of the chronograph hand.
  • a brake (not shown) is also provided to immobilize the RC chronograph wheel at the time of disengagement.
  • the teeth of the intermediate wheel RI and those of the chronograph wheel RC do not have the conventional triangular shape, but an asymmetric shape designed to improve the quality of the clutch and the meshing between them. wheels.
  • the teeth of the intermediate wheel RI have a distal portion 1 of asymmetrical shape intended to cooperate with the toothing of the chronograph wheel RC, and a proximal portion 2 intended to cooperate with the teeth of the driving wheel RM.
  • the rear flank 3 of the teeth of the intermediate wheel RI, in the distal portion, and the leading edge 4 of the teeth of the chronograph wheel RC are designed to prevent the chronograph wheel from reversing substantially when the intermediate wheel meshes with the wheel. Chronograph (clutch).
  • the rear flank 3 of the teeth of the intermediate wheel RI, partly proximal, and the leading edge 5 (FIG. 8) of the teeth of the driving wheel RM are designed to improve the regularity of the meshing between the intermediate and driving wheels.
  • leading edge 6 of the teeth of the intermediate wheel RI, in the distal portion, and the rear flank 7 of the teeth of the chronograph wheel RC are designed to improve the regularity of the meshing and to reduce the phenomena of wear between the intermediate wheel and the chronograph wheel.
  • the rear flank 3 of the teeth of the intermediate wheel R1 and the leading edge 4 of the teeth of the chronograph wheel RC will be described as "inactive” because they do not cooperate with, respectively, the gearing of the chronograph wheel RC and the toothing of the intermediate wheel R1 when the gear train is in the engaged position, as opposed to the front flank 6 and the rear flank 7 ("active" flanks) which serve as a contact surface with the toothing of the RC chronograph wheel and the intermediate wheel R1, respectively.
  • Figures 9 and 10 show schematically how is determined the shape of the rear flanks, inactive, 3 teeth of the intermediate wheel RI and front flanks, inactive, 4 of the chronograph wheel RC.
  • the wheels RM, RI and RC are represented by the circles corresponding to their respective outside diameters ⁇ M, ⁇ 1 and ⁇ C, that is to say the circles defined by the tops of the teeth.
  • the intermediate wheel RI rotates in a satellite around the driving wheel RM.
  • the center OI of the intermediate wheel RI describes a trajectory in an arc (see Figure 9, reference 8) while, if we neglect the rotation performed by the drive wheel RM during the duration of the clutch, each point of the periphery of the intermediate wheel R1 describes an epicycloid portion.
  • FIG. 9 illustrates the epicycloid (reference 9) on which the vertex or tip 10I of a tooth DIn of the intermediate wheel moves whose radial axis is at a given moment of this clutch phase coinciding with the AC axis passing through respective centers OI, OC of the intermediate wheel and the chronograph wheel and whose top 10I is, at the same time, on the circle of outer diameter ⁇ C of the chronograph wheel.
  • radial axis means, for a given tooth, the axis passing through the top of the tooth and the center of the corresponding wheel.
  • the tooth Dln has been represented by a portion of its radial axis, drawn in strong line.
  • the initial positions of the wheel RI (dashed circle), the center OI of the wheel RI (reference Ol ') and the tooth Dln (reference Dln') have also been represented.
  • the tooth Dln When clutching, the tooth Dln only describes a portion of the epicycloid 9 constituting the path 9 'of penetration of the tooth Dln into the toothing of the chronograph wheel RC. Locally, in the vicinity of the point of contact between the circles of outside diameters ⁇ 1 and ⁇ C, this penetration trajectory 9 'is substantially an arc of a circle.
  • the teeth Dln and DCk are shaped so that, in this critical situation, the profile of the leading edge 4 of the tooth DCk and of the distal portion of the trailing edge 3 of the tooth Dln is oriented substantially following the trajectory 9 'of penetration of the tooth Dln into the toothing of the chronograph wheel.
  • the leading edge 4 of the tooth DCk and the distal portion of the rear flank 3 of the tooth Dln can precisely follow the path 9 'of penetration of the tooth Dln into the toothing of the chronograph wheel and thus have a curved, convex profile for the tooth Dln and concave tooth DCk, as shown in Figure 10.
  • the profile of the sidewalls 3, 4 can be straight and oriented along the tangent to the trajectory 9 'taken at the point of contact between the vertices 10I, 10C teeth Dln, DCk (or in other words at the point of intersection between the trajectory 9 'and the circle of outer diameter ⁇ C of the RC wheel), as shown in Figure 11 where the tangent is designated by the reference
  • the difference between these two variants is very small, so that we can prefer the right profile, easier to implement.
  • tops of the teeth of the intermediate wheel RI and the chronograph wheel RC as shown in Figures 10, 11 are pointed. These vertices may however be slightly rounded, as shown in Figures 4 to 7. In the latter case, when the top of a tooth DIn is in contact with the top of a tooth DCk, the distal portion of the sidewall 3 and the flank 4 of these two teeth are slightly offset relative to each other.
  • the trajectory described by the vertex 101 of the tooth DIn in a fixed reference relative to the chronograph has been used.
  • the intermediate wheel R1 remains fixed during the clutch while, if we neglect the rotation of the driving wheel RM on itself (corresponding to the rotation of the second wheel), the driving wheel RM rolls on the intermediate wheel Rl and the chronograph wheel RC moves such that, for each point of the periphery of the RC wheel, the distance between this point and the center OM of the driving wheel RM remains constant.
  • FIG. 13 shows the curve (reference 13) on which, in a reference frame linked to the intermediate wheel RI, the vertex 10C of any tooth DCk of the chronograph wheel RC, the radial axis of which is at a given moment, moves given during the clutch coincides with the axis AC passing through the respective centers OI, OC of the intermediate wheel and the chronograph wheel and whose vertex 10C is, at the same time, on the circle of outside diameter ⁇ l of the intermediate wheel. Also shown in FIG.
  • the apex 10C only describes a portion of the curve 13 constituting the trajectory 13 'of relative penetration of the apex 10C in the toothing of the intermediate wheel R1.
  • this relative penetration trajectory 13 ' is substantially coincident with the trajectory 9' illustrated in Figures 9 and 10, and its tangent to said point of contact is the same as that of the trajectory 9 '.
  • the wheels R1 and RC in order to reduce the operating clearances between the wheels RM, RI and RC, preferably carry a number of teeth such that each free space between two consecutive teeth of the wheel RI embraces two teeth of the RC wheel, as shown in Figures 6 and 7.
  • the "active" rear flank 7 of the teeth of the chronograph wheel RC and the distal portion of the "active" front flank 6 of the teeth of the intermediate wheel RI have a profile. convex, preferably in an arc. These two flanks 6, 7 cooperate with each other to allow a smooth meshing between the wheels RI, RC and to avoid the edge-to-flank contacts that are encountered in conventional chronograph wheels and which lead to wear of the teeth.
  • the proximal portion 2 of the teeth of the intermediate wheel R1 cooperates exclusively with the toothing of the driving wheel RM while the distal portion 1 cooperates exclusively with the toothing of the chronograph wheel RC .
  • the engagement diameter of the intermediate wheel RI with the chronograph wheel RC is greater than the engagement diameter of the intermediate wheel RI with the drive wheel RM.
  • the shape of the distal portion 1 of the teeth of the intermediate wheel RI is optimized for its function of clutch / declutching without recoil of the chronograph wheel RC and regular meshing with the chronograph wheel RC and the shape of the Proximal portion 2 is optimized for its regular meshing function with the RM drive wheel.
  • Figures 14 and 15 illustrate a chronograph wheel according to a second embodiment of the invention.
  • This wheel differs from that previously described in that the intermediate wheel comprises not a single wheel but two wheels RI1, RI2 located in two different planes. These two wheels are integral with each other and linked by the same axis AL.
  • One of these wheels, RI1, is located in the same plane as the drive wheel RM 'and meshes continuously with it.
  • the second of these wheels, RI2 is located in the same plane as the wheel Chronograph RC '.
  • the intermediate mobile such as the intermediate wheel RI of the first embodiment, can take an engaged position and a disengaged position.
  • the teeth of the wheel RC 'and at least the distal portion of the teeth of the intermediate wheel RI2 are shaped in the same manner as, respectively, the teeth of the wheel RC and the wheel RI of the first embodiment.
  • the shape of the proximal part of the teeth of the wheel R12 is of little importance because, unlike that of the wheel RI of the first embodiment, it has no meshing function.
  • the shape of the teeth of the driving wheel RM 'and the intermediate wheel RI1 may be conventional, for example epicyclic as shown in FIG. 14.
  • FIG 16 shows a chronograph wheel according to a third embodiment of the invention.
  • the intermediate wheel, designated Rla is in permanent engagement with the chronograph wheel, designated RCa, and not with the driving wheel as in the first and second embodiments.
  • the train Under the action of a rocker Ba connecting the wheels RCa and Rla, the train can take an engaged position in which the intermediate wheel Rla meshes with the driving wheel, designated RMa, and a disengaged position in which the meshing between the Rla and RMa wheels is broken.
  • the intermediate wheel Rla is driven by the driving wheel RMa and in turn drives the chronograph wheel RCa.
  • the driving wheel RMa rotates without driving any of the wheels Rla and RCa, which therefore remain stationary.
  • This third embodiment makes it possible to obtain an energy saving with respect to the first two embodiments described above since at the rest state of the chronograph (disengaged position), the driving wheel RMa does not have to rotate the intermediate wheel Rla.
  • This profile is shaped so that when the radial axis of any one of the teeth of the intermediate wheel Rla coincides with the radial axis of any one of the teeth of the driving wheel RMa and the respective apices of these teeth are in contact with each other, it is oriented substantially along the path of penetration into the teeth of the driving wheel RMa from the top of said tooth of any intermediate wheel Rla or, which amounts to the same , substantially along the path of relative penetration into the teeth of the wheel Rla of any tooth of the wheel RMa.
  • the inactive flank of the teeth of the intermediate wheel Rla is the leading edge, 6a
  • that of the teeth of the driving wheel RMa is the rear flank, 5a. This profile of the flanks 6a, 5a prevents the flank 6a from striking the flank 5a during clutching, which would cause a recoil reaction of the intermediate wheel Rla and therefore the chronograph wheel RCa.
  • the distal portion of the active side of the teeth of the wheel Rla, that is to say the rear flank 3a intended to be pushed by the teeth of the wheel RMa, and the active flank of the teeth of the wheel RMa, that is to say the leading edge 5a 'intended to push the flank 3a of the teeth of the wheel Rla, are convex to avoid edge-to-edge contacts between the Rla and RMa wheel teeth.
  • the proximal portion of the flank 6a is concave and complementary to the profile, convex, of the rear flank 7a of the teeth of the chronograph wheel RCa, in order to obtain a smooth and regular meshing between the wheels Rla and RCa.
  • the gear train according to this third embodiment can be modified so that the intermediate wheel comprises two intermediate wheels superposed and secured to one of the other, one of these wheels being in permanent engagement with the chronograph wheel RCa and the other being intended to mesh with the driving wheel RMa.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Unknown Time Intervals (AREA)

Claims (15)

  1. Chronographenräderwerk, ein erstes Rad (RM), ein Zwischendrehteil, im permanenten Eingriff mit dem ersten Rad (RM) befindlich und ein Zwischenrad (RI) umfassend, sowie ein drittes Rad (RC) umfassend, das sich im Wesentlichen in der gleichen Ebene wie das Zwischenrad (RI) befindet, wobei vom ersten und dritten Rad eines ein führendes Rad und das andere ein Chronographenrad ist, das dafür bestimmt ist, mit einem Chronographenzeiger verbunden zu werden, das Räderwerk eine eingerückte Stellung, in der sich das Zwischenrad (RI) mit dem dritten Rad (RC) im Eingriff befindet, sowie eine ausgekuppelte Stellung einnehmen kann, in der der Eingriff zwischen dem Zwischenrad (RI) und dem dritten Rad (RC) unterbrochen ist, und jeder Zahn des Zwischenrades (RI) bzw. des dritten Rades (RC) eine als "aktiv" bezeichnete Flanke (6, 7), die dafür bestimmt ist, mit der Zahnung des dritten Rades (RC) bzw. des Zwischenrades (RI) zusammenzuwirken, während sich das Räderwerk in seiner eingerückten Stellung befindet, sowie eine entgegengesetzte, als "passiv" bezeichnete Flanke (3, 4) besitzt, dadurch gekennzeichnet, dass die Zähne des Zwischenrades (RC) und des dritten Rades (RC) so gestaltet sind, dass, wenn zu einem gegebenen Zeitpunkt während des Einrückens die Radialachse eines beliebigen (DIn) der Zähne des Zwischenrades (RI) und die Radialachse eines beliebigen (DCk) der Zähne des dritten Rades (RC) mit der Achse (AC) zusammenfallen, die durch die jeweiligen Mittelpunkte (OI, OC) des Zwischenrades (RI) und des dritten Rades (RC) verläuft, und die Spitzen (10I, 10C) dieser Zähne (DIn, DCk) miteinander in Berührung stehen, das Profil der passiven Flanke (3) des Zahnes (DIn) des Zwischenrades (RI) bzw. des Zahnes (DCk) des dritten Rades (RC) zumindest in dem Abschnitt des Zahnes, der dazu bestimmt ist, mit der Zahnung des dritten Rades (RC) bzw. des Zwischenrades (RI) zusammenzuwirken, im Wesentlichen der epicycloiden Bahn (9') des Eingriffs der Spitze (10I) des Zahnes (DIn) des Zwischenrades (RI) in die Zahnung des dritten Rades (RC) folgend ausgerichtet ist.
  2. Chronographenräderwerk nach Anspruch 1, dadurch gekennzeichnet, dass das Profil der aktiven Flanke (6) der Zähne des Zwischenrades (RI) zumindest in dem Abschnitt (1) dieser Zähne, der dafür bestimmt ist, mit der Zahnung des dritten Rades (RC) zusammenzuwirken, konvex ist.
  3. Chronographenräderwerk nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Profil der aktiven Flanke (7) der Zähne des dritten Rades (RC) zumindest in dem Abschnitt dieser Zähne, der dafür bestimmt ist, mit der Zahnung des Zwischenrades (RI) zusammenzuwirken, konvex ist.
  4. Chronographenräderwerk nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Profil der passiven Flanke (3, 4) des Zahnes (DIn) des Zwischenrades (RI) bzw. des Zahnes (DCk) des dritten Rades (RC) zumindest in dem Abschnitt des Zahnes, der dafür bestimmt ist, mit der Zahnung des dritten Rades (RC) bzw. des Zwischenrades (RI) zusammenzuwirken, gekrümmt ist.
  5. Chronographenräderwerk nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Profil der passiven Flanke (3, 4) des Zahnes (DIn) des Zwischenrades (RI) bzw. des Zahnes (DCk) des dritten Rades (RC) zumindest in dem Abschnitt des Zahnes, der dafür bestimmt ist, mit der Zahnung des dritten Rades (RC) bzw. des Zwischenrades (RI) zusammenzuwirken, gerade und im Wesentlichen der Tangente zu der Bahn (9') am Berührungspunkt zwischen den Spitzen (10I, 10C) folgend ausgerichtet ist.
  6. Chronographenräderwerk nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das erste Rad (RM), das Zwischenrad (RI) und das dritte Rad (RC) im Wesentlichen in der gleichen Ebene liegen und dass sich das Zwischenrad (RI) im permanenten Eingriff mit dem ersten Rad (RM) befindet.
  7. Chronographenräderwerk nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Zwischendrehteil ausser dem benannten Zwischenrad (RI2) ein zweites Zwischenrad (RI1) umfasst, das in einer anderen Ebene als das benannte Zwischenrad (RI2), aber im Wesentlichen in der gleichen Ebene wie das erste Rad (RM') liegt, und dadurch, dass dieses zweite Zwischenrad (RI1) fest mit dem benannten Zwischenrad (RI2) verbunden ist und im permanenten Eingriff mit dem ersten Rad (RM') steht.
  8. Chronographenräderwerk nach Anspruch 6, dadurch gekennzeichnet, dass ein distaler Abschnitt (1) der Zähne des Zwischenrades (RI) ausschliesslich mit der Zahnung des dritten Rades (RC) zusammenwirkt und ein proximaler Abschnitt (2) der Zähne des Zwischenrades (RI) ausschliesslich mit der Zahnung des ersten Rades (RM) zusammenwirkt, während sich das Räderwerk in der eingerückten Position befindet.
  9. Chronographenräderwerk nach Anspruch 8, dadurch gekennzeichnet, dass die passive Flanke (3) der Zähne des Zwischenrades (RI) im proximalen Abschnitt (2) dieser Zähne ein konkaves Profil besitzt.
  10. Chronographenräderwerk nach Anspruch 9, dadurch gekennzeichnet, dass die Flanke (5) der Zähne des ersten Rades (RM), die mit der Zahnung des Zwischenrades (RI) zusammenwirkt, ein konvexes Profil besitzt, das zum konkaven Profil des proximalen Abschnitts (2) der passiven Flanke (3) der Zähne des Zwischenrades (RI) komplementär ist.
  11. Chronographenräderwerk nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass die Anzahl der Zähne des Zwischenrades (RI) und die des dritten Rades (RC) eine solche ist, dass jeder freie Raum zwischen zwei aufeinanderfolgenden Zähnen des Zwischenrades (RI) zwei Zähne des dritten Rades (RC) umfasst.
  12. Chronographenräderwerk nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass das erste Rad (RM) das führende Rad und das dritte Rad (RC) das Chronographenrad ist, und dadurch, dass die passive Flanke (3) der Zähne des Zwischenrades (RI) eine Hinterflanke und die passive Flanke (4) der Zähne des Chronographenrades (RC) eine Vorderflanke ist.
  13. Chronographenräderwerk nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass das erste Rad (RCa) das Chronographenrad und das dritte Rad (RMa) das führende Rad ist, und dadurch, dass die passive Flanke der Zähne des Zwischenrades (RIa) eine Vorderflanke (6a) und die passive Flanke der Zähne des führenden Rades (RMa) eine Hinterflanke (5a) ist.
  14. Chronograph, ein Räderwerk umfassend, wie es in einem der Ansprüche 1 bis 13 definiert ist.
  15. Verfahren zur Realisierung eines Chronographenräderwerkes, ein erstes Rad (RM), ein Zwischendrehteil, im permanenten Eingriff mit dem ersten Rad (RM) befindlich und ein Zwischenrad (RI) umfassend, sowie ein drittes Rad (RC) umfassend, das sich im Wesentlichen in der gleichen Ebene wie das Zwischenrad (RI) befindet, wobei vom ersten und dritten Rad eines ein führendes Rad und das andere ein Chronographenrad ist, das dafür bestimmt ist, mit einem Chronographenzeiger verbunden zu werden, das Räderwerk eine eingerückte Stellung, in der sich das Zwischenrad (RI) mit dem dritten Rad (RC) im Eingriff befindet, sowie eine ausgekuppelte Stellung einnehmen kann, in der der Eingriff zwischen dem Zwischenrad (RI) und dem dritten Rad (RC) unterbrochen ist, und jeder Zahn des Zwischenrades (RI) bzw. des dritten Rades (RC) eine als "aktiv" bezeichnete Flanke (6, 7), die dafür bestimmt ist, mit der Zahnung des dritten Rades (RC) bzw. des Zwischenrades (RI) zusammenzuwirken, während sich das Räderwerk in seiner eingerückten Stellung befindet, sowie eine entgegengesetzte, als "passiv" bezeichnete Flanke (3, 4) besitzt, das Verfahren dadurch gekennzeichnet, dass man bei Auslegung des Chronographenräderwerkes, um die Gefahr eines unzeitigen Rückfalls des Chronographenrades beim Einrücken zu verringern, die Gestalt der passiven Flanke (3, 4) der Zähne des Zwischenrades (RI) und der Zähne des dritten Rades (RC) in Abhängigkeit von zumindest einer der folgenden Kurven festlegt:
    - der epicycloiden Bahn (9') des Eingriffs in die Zahnung des dritten Rades (RC), die durch die Spitze (10I) eines beliebigen (DIn) der Zähne des Zwischenrades (RI) beschrieben wird, dessen Radialachse zu einem gegebenen Augenblick während des Einrückens mit der Achse (AC) zusammenfällt, die durch die Mittelpunkte (OI, OC) des Zwischenrades (RI) und des dritten Rades (RC) verläuft, und dessen Spitze (10I) sich in diesem Augenblick auf dem Umkreis (δC) des dritten Rades (RC) befindet,
    - der Tangente (9") zu dieser Bahn (9') am Schnittpunkt zwischen dieser Bahn (9') und dem Umkreis (δC) des dritten Rades (RC),
    - der Bahn (13') des relativen Eingriffs in die Zahnung des Zwischenrades (RI), die durch die Spitze (10C) eines beliebigen (DCk) der Zähne des dritten Rades (RC) beschrieben wird, dessen Radialachse zu einem gegebenen Zeitpunkt während des Einrückens mit der Achse (AC) zusammenfällt, die durch die Mittelpunkte (OI, OC) des Zwischenrades (RI) und des dritten Rades (RC) verläuft und dessen Spitze (10C) sich in diesem Augenblick auf dem Umkreis (δI) des Zwischenrades (RI) befindet, und
    - der Tangente zu dieser Bahn (13') des relativen Eingriffs am Schnittpunkt zwischen dieser Bahn (13') des relativen Eingriffs und dem Umkreis (δI) des Zwischenrades (RI).
EP03000257A 2003-01-08 2003-01-08 Räderwerk eines Chronographes Expired - Lifetime EP1437633B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE60307035T DE60307035T2 (de) 2003-01-08 2003-01-08 Räderwerk eines Chronographes
EP03000257A EP1437633B1 (de) 2003-01-08 2003-01-08 Räderwerk eines Chronographes

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EP03000257A EP1437633B1 (de) 2003-01-08 2003-01-08 Räderwerk eines Chronographes

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EP1437633A1 EP1437633A1 (de) 2004-07-14
EP1437633B1 true EP1437633B1 (de) 2006-07-26

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3032358A1 (de) 2014-12-12 2016-06-15 Richemont International S.A. Chronografen-Mechanismus für Uhr

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH704637B1 (fr) 2007-11-14 2012-09-28 Frank Mueller Watchland S A Roue dentée, engrenage, mouvement horloger et pièce d'horlogerie correspondants.
EP3324249A1 (de) 2016-11-17 2018-05-23 Nogerah SA Kupplungssystem für chronograph
EP3492779B1 (de) 2017-11-29 2020-09-23 Patek Philippe SA Genève Kupplungsrad mit spielnachstellung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US143619A (en) * 1873-10-14 Improvement in double-stop movements for watches
FR671111A (fr) * 1929-03-08 1929-12-09 Mathias Et Edmond Ulmann Chronographe. - compteur simplifié
FR1488410A (fr) * 1966-06-03 1967-07-13 Centre Nat Rech Scient Perfectionnements aux engrenages

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3032358A1 (de) 2014-12-12 2016-06-15 Richemont International S.A. Chronografen-Mechanismus für Uhr

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EP1437633A1 (de) 2004-07-14
DE60307035D1 (de) 2006-09-07
DE60307035T2 (de) 2007-02-01

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