EP0008832B1 - Ein Differentialgetriebe enthaltendes Uhrwerk mit Zeigern - Google Patents

Ein Differentialgetriebe enthaltendes Uhrwerk mit Zeigern Download PDF

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Publication number
EP0008832B1
EP0008832B1 EP79200475A EP79200475A EP0008832B1 EP 0008832 B1 EP0008832 B1 EP 0008832B1 EP 79200475 A EP79200475 A EP 79200475A EP 79200475 A EP79200475 A EP 79200475A EP 0008832 B1 EP0008832 B1 EP 0008832B1
Authority
EP
European Patent Office
Prior art keywords
gear
pinion
wheel
planet
teeth
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.)
Expired
Application number
EP79200475A
Other languages
English (en)
French (fr)
Other versions
EP0008832A2 (de
EP0008832A3 (en
Inventor
Pierre-Alain Vuille
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.)
Ebauchesfabrik ETA AG
Original Assignee
Ebauchesfabrik ETA 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.)
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Publication date
Application filed by Ebauchesfabrik ETA AG filed Critical Ebauchesfabrik ETA AG
Publication of EP0008832A2 publication Critical patent/EP0008832A2/de
Publication of EP0008832A3 publication Critical patent/EP0008832A3/xx
Application granted granted Critical
Publication of EP0008832B1 publication Critical patent/EP0008832B1/de
Expired legal-status Critical Current

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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
    • G04B27/00—Mechanical devices for setting the time indicating means
    • G04B27/005—Mechanical devices for setting the time indicating means stepwise or on determined values
    • 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
    • G04B13/007—Gearwork with differential work
    • 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
    • G04B19/22—Arrangements for indicating different local apparent times; Universal time pieces
    • G04B19/221—Arrangements for indicating different local apparent times; Universal time pieces mechanisms for correcting the hours hand only, i.e. independently for minutes and seconds hands

Definitions

  • the present invention relates generally to needle display devices having a differential gear mechanism.
  • patent CH 507 544 proposed a composite hour wheel formed of two parts frictionally coupled to each other, the relative positions of these two parts being determined by the engagement of a pin secured to one parts in the holes of the other part.
  • the complete arrangement includes friction between the roadway and the shaft which drives it and a second friction in the composite hour wheel.
  • Patents FR-A-1,589,638 and CH 494,997 propose another solution in which the composite hours mobile is replaced by a differential gear comprising a planet carrier and a satellite with two teeth.
  • the satellite wheel is engaged with the roadway while its pinion is engaged with the hour wheel.
  • the satellite normally plays the role of the timer wheel, but by moving the planet carrier by means of a control member, one can cause a rapid rotation of the hour wheel without changing the position of the roadway.
  • a device of this kind therefore avoids the presence of a friction coupling.
  • German patent application DE-A-1673 621 also describes an arrangement of this type.
  • Patent application DE-A-2 730 948 also describes a differential gear mechanism comprising a satellite with two teeth. In this case, it is the planetary pinion which constitutes the control mobile. The satellite is mounted on a toothed disc which constitutes the minute wheel and its pinion toothing is engaged with the hour wheel.
  • the present invention relates to a timepiece movement comprising a needle display mechanism equipped with a differential gear which itself comprises a carrier satel- lite, at least one satellite, a sun gear and a sun gear, and in which an hour hand is mounted on a barrel integral with the planet carrier and a minute hand is mounted on a tube integral with a roadway, and the planetary wheel is an inner gear crown engaged with the satellite (s) and connected to a mechanism control member.
  • the planet carrier is a member which comprises two parallel discs between which are mounted two satellites. Between these two discs, further extends the planetary pinion which is engaged with the satellites and which is also attacked by a drive pinion.
  • the object of the present invention is to improve the known clock movements of the genre mentioned above, in order to eliminate the faults which have just been reported.
  • the movement according to the invention is characterized in that the satellite (s) are elements with two coaxial teeth, one of which is engaged with the planetary pinion and the other with said internal toothing of the planetary wheel and in that the roadway has a pinion toothing which constitutes the planetary pinion.
  • the movement shown in fig. 1 is a watch movement which can be either an electronic battery and quartz watch, comprising a stepping motor actuating a gear train, or a mechanical watch. All of these are classic. They are mounted on the reverse of plate 1 and are not shown in the drawing.
  • the train comprises a drive pinion 2 which is engaged with a minute wheel 3 coaxial with the movement, so that this wheel is driven at the rate of one revolution per hour.
  • the minute wheel 3 is an element of the assembly shown in FIGS. 2 and 3. They will be described later.
  • the assembly represented in FIGS. 2 and 3 notably includes an hour wheel which drives a calendar mechanism advancing by jumps, once per 24 hours, a date ring 4.
  • the calendar mechanism is also of the usual type, so it will not be described in detail here.
  • the calendar is corrected by means of the control mechanism which is actuated by the rod 5 (fig. 1). This rod is arranged radially in the movement between the plate 1 and the bridges. It activates the control mechanism visible in fig.
  • the star 14b cooperates with an elastic arm 15 playing the role of jumper and extending from a retaining plate 16 placed on the plate 1.
  • the role of the mobile 14 and that of the jumper spring 15 will be explained later in relationship with the differential gear which drives the needles.
  • the movable reference 12 mounted on the rocker 9 engages with a time setting reference 17 which meshes with the roadway as will be seen below.
  • the rod 5 therefore makes it possible to exercise the functions of setting the time of the hands, and of advancing the hour hand alone by jumps of one hour. This last function also ensures the correction of the calendar if necessary.
  • the rod is disconnected and this position is a neutral position.
  • Figs. 2 and 3 show how the motor and the control mechanism act on the bodies which carry the needles.
  • the second hand 18 is mounted at the end of a second shaft 19 which has a wheel 20 engaged with the cog operated by the engine.
  • the seconds shaft 19 is supported by a bearing 21 mounted in the plate 1.
  • the upper surface of this bearing holds in place the barrel of the carriageway 22 which carries the minute hand 23.
  • the carriageway carries in the vicinity of its end lower a large diameter disc 24 provided with a peripheral toothing in which the time-setting reference gear 17 engages. Above the disc 24, the carriageway has a bearing surface 22a on which the minute wheel 3 is adjusted. clamping of this wheel on the surface of the roadway is adjusted so as to produce a friction coupling having a well-defined disengaging torque.
  • the disc of the minute wheel is cut so as to present two parallel and narrow bars 38 and 39 which may have notches in an arc of radius corresponding to that of the adjustment range 22a.
  • the tightening exerted by the bars 38 and 39 on the friction surface of the roadway can thus be precisely adjusted by allowing a slight bending of the bars.
  • a road pinion 25 is still driven on the barrel 22, immediately above the wheel 3. It meshes, as can be seen in FIG. 3, in the toothing of the wheel of a satellite 26 with two toothing carried by a disc 27 secured to a barrel 28 and constituting with this barrel the hour wheel.
  • the disc 27 is provided with a key entry hole 29 which allows the positioning of the satellite 26, which is machined in one piece with a pinion toothing of very small diameter and a toothing of the wheel which , as mentioned above, meshes in the road pinion 25.
  • the peripheral toothing of the disc 27 meshes in the toothing of the wheel of a calendar mobile 30 rotating on a pin 31 fixed in the plate 1.
  • the pinion teeth of the calendar mobile drives a 24-hour wheel 32 provided with a finger elastic capable of driving the calendar ring 4 once per turn by hooking one of its inner teeth, these being regularly distributed around its periphery.
  • the barrel 28 carries the hour hand 33. It rests on the upper face of the road pinion 25 and is held in place by the last element 34 of the differential gear.
  • This last element which plays the role of a planetary wheel, is a crown with internal teeth provided with a pivot bearing 35 having a diameter slightly larger than that of the crown teeth and a peripheral external teeth 36.
  • the element 34 is positioned by the retaining plate 16 which has in its central part a circular hole in which engages the bearing 35.
  • This plate covers the external part of the element 34 and is used to hold in place axially. As it is screwed onto the plate, it assures the assembly of the differential mechanism and the control mechanism. It makes it possible to house all of these elites in a very limited space.
  • the toothing 36 of the crown 34 is in engagement with the toothing of the wheel 14a of the mobile 14 which, as we have seen above, also includes the star 14b located immediately under the wheel 14a and the pinion 14c located under the star 14b.
  • the intermediate return 13 and the mobile 14 both pivot on pins planted in the plate. They are held in place axially by corresponding elements of the holding plate.
  • the latter also has a hole 37 (fig. 1 and 2) used to limit the movements of the movable gear 12 by cooperating with the end of the axis of this gear, this axis being integral with the rocker 9 and extending projecting to the level of the part of the retaining plate which has the hole 37.
  • the hands are regularly driven by the watch motor. While the shaft 19 of the second hand, connected to the motor rotor by a gear train, is actuated by pulses, this gear train also transmits the engine torque to the pinion 2 and to the wheel 3. That -This causes the roadway 22 by friction and as the crown 34 is fixed, the road pinion 25 causes the satellite 26 to roll by its pinion teeth on the internal teeth of the crown 34. As a result, the satellite carrier 27 which plays the hour wheel role rotates slowly around the axis of movement, driven by the intermediate shaft of the satellite 26.
  • the reference 12 When the rod is brought into the time setting position, the reference 12 is engaged with the time setting reference 17 and a rotation of the rod rotates the disc 24 secured to the roadway 22. Under these conditions , a contact will switch off the watch engine, including all of the gear train. The wheel 3 will be blocked, while the pavement 22 linked to friction with the wheel 3 is driven at a relatively high speed. As in normal operation, but at a higher speed, the pinion 25 will cause the satellite 26 to roll on the inner ring. 34 by moving the hour hand 33 at a speed twelve times lower than the minute hand. Thus, the two hands move in their normal ratio, the second hand being stopped.
  • the motor In the intermediate position of the rod, the motor is not blocked, so that the second hand advances at the rate imposed by the time base of the watch. If the rod is moved in rotation, the intermediate return 13 rotates the mobile 14 and the rotation of the latter is marked by stop positions in which the head of the jumper 15 engages between two teeth of the star 14b .
  • the rotation of the mobile 14 is therefore a jerky rotation.
  • the angle of rotation which, for the crown placed at the head of the rod, corresponds to a rotation of 72 ° of the mobile 14 being of the order of 60 °, this angle is substantially that which is easily imparted to the crown holding it between the thumb of the index finger. As the wheel 14a is engaged with the external toothing of the element 34, it is now the latter which is driven in rotation.
  • the teeth of the wheel teeth of the satellite 26 rest on the pinion 25 which acts as a planetary gear and the satellite is moved in rotation around the axis of the needles by the internal toothing of the element 34. By its axis, the satellite rotates the wheel 27, driving the hour hand 33.
  • the displacement corresponding to a jump of the star 14b corresponds to 1/12 of a turn of the hand 33 and therefore to a advance one hour.
  • Fig. 4 schematically represents the assembly of the differential gear described above and shows in its right part the points of application of the forces.
  • the element 34 is forcedly driven by the control mechanism. It exerts on the pinion teeth of the satellite 26 a force located at level P3, therefore a torque given by the product of its distance from the axis of the needles by the tangential force. This torque produces the driving of the hour wheel by pressing the toothing of the satellite wheel on the toothing of roadway 25.
  • the force transmission on the planet carrier takes place at level P2, while the reaction on the roadway performs at level P1.
  • the tangential force exerted on the planetary gear 25 will be reduced in the ratio of the teeth of the satellite relative to the tangential force exerted by the element 34 on the gear teeth of the satellite.
  • This force will itself be reduced in the ratio of the radius of the wheel teeth to the sum of the radii of the teeth of the satellite with respect to the tangential resistance force offered by the hours wheel. Even when this resistance is increased as a result of arming the calendar mechanism, the reaction on the road remains minimal.
  • the construction of the minute wheel, formed by the carriageway 22, the pinion 25, the toothed disc 24 and the wheel 3 can be improved and simplified as shown in partial figure 5.
  • the pinion 25 has a neckline in one piece with the barrel 22 of the roadway and has truncated teeth at their base.
  • the disc 24 is driven on the truncated teeth of the pinion 25 while the bearing 22a is located under the pinion 25, so that the wheel 3 is located under the disc 24.
  • This arrangement simplifies the manufacture since it only has three pieces instead of four.
  • the crimping of the wheel 3 on the bearing 22a is easier to perform.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Gears, Cams (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)

Claims (7)

1. Uhrwerk mit einem, Zeiger aufweisenden Anzeigemechanismus, der mit einem Differentialgetriebe ausgerüstet ist, welches seinerseits einen Planetenträger (27), mindestens ein Planetenrad (26), ein Sonnenrad (25) und einen Zahnkranz (34) aufweist, und in welchem ein Stundenzeiger (33) auf einem Rohr angebracht ist, das fest mit dem Planetenträger verbunden ist, in welchem ferner ein Minutenzeiger (23) auf einem Rohr (22) angebracht ist, welches einem Minutenrohr angehört, verbunden ist, und in welchem der Zahnkranz ein innenverzahnter Kranz ist, der mit dem oder den Planetenrädern in Eingriff steht und mit einem Stellorgan des Mechanismus verbunden ist, dadurch gekennzeichnet, dass der oder die Planetenräder (26) Elemente sind, die zwei koaxiale Verzahnungen haben, von denen die eine mit dem Sonnenrad (25) und die andere mit der Innenverzahnung des Zahnkranzes (34) in Eingriff steht, und dass das Minutenrohr (22) eine Ritzelzahnung aufweist, die das Sonnenrad bildet.
2. Uhrwerk nach Anspruch 1, dadurch gekennzeichnet, dass der Planetenträger (27) eine an ihrem Umfang verzahnte Scheibe ist, welche ein schlüssellochförmiges Loch (29) hat, und dass das Differentialgetriebe ein Planetenrad mit zwei Verzahnungen (26) aufweist, wobei diese beiden Verzahnungen durch ein Wellensegment verminderten Durchmessers miteinander verbunden sind und wobei die Abmessungen des schlüssellochförmigen Loches solche sind, dass sie es ermöglichen, das Planetenrad durch sein Wellensegment in die Partie verminderter Weite der besagten Oeffnung zu stecken.
3. Uhrwerk nach Anspruch 2, dadurch gekennzeichnet, dass die Umfangszahnung des Planetenträgers (27) mit einem Kalenderrad (30) in Eingriff steht.
4. Uhrwerk nach Anspruch 1, dadurch gekennzeichnet, dass der besagte innenverzahnte Kranz auch eine Aussenverzahnung hat, die mit einem Stundenstellrad (14) in Eingriff steht, welches ihn sprungweise antreibt oder ihn in irgend einer von zwölf um seine Achse verteilen Orientierungen blockiert.
5. Uhrwerk nach Anspruch 4, dadurch gekennzeichnet, dass das Stellrad (14) fest mit einem Stern (14b) verbunden ist, der mit einer Hebelfeder (15) wirkverbunden ist und um eine feststehende Achse drehbar ist, wobei die Anzahl der am Stern vorhandenen Zähne so gewählt ist, dass ein Sprung um einen Zahn einer Vorstellung des Stundenzeigers um eine Zwölftelsumdrehung entspricht, wobei diese Vordrehung durch Abwälzen eines der Zähne des oder der Planetenräder auf der Zahnung des Minutenrohres bewirkt wird.
6. Uhrwerk nach Anspruch 1, dadurch gekennzeichnet, dass das Minutenrohr fest mit einer Zahnung von grossem Durchmesser (14) verbunden ist, welche mit einem Stellorgan (17) eingreift.
7. Uhrwerk nach Anspruch 1, dadurch gekennzeichnet, dass ein Minutenrad (3) auf dem Minutenrohr (22) koaxial angebracht und mit ihr durch eine Reibkupplung verbunden ist, wobei dieses Rad durch ein Antriebselement angetrieben ist.
EP79200475A 1978-09-04 1979-08-30 Ein Differentialgetriebe enthaltendes Uhrwerk mit Zeigern Expired EP0008832B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH9264/78 1978-09-04
CH926478A CH617815GA3 (de) 1978-09-04 1978-09-04

Publications (3)

Publication Number Publication Date
EP0008832A2 EP0008832A2 (de) 1980-03-19
EP0008832A3 EP0008832A3 (en) 1980-04-02
EP0008832B1 true EP0008832B1 (de) 1982-09-01

Family

ID=4350106

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79200475A Expired EP0008832B1 (de) 1978-09-04 1979-08-30 Ein Differentialgetriebe enthaltendes Uhrwerk mit Zeigern

Country Status (5)

Country Link
US (1) US4259735A (de)
EP (1) EP0008832B1 (de)
JP (1) JPS5537996A (de)
CH (1) CH617815GA3 (de)
DE (1) DE2963613D1 (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS618396Y2 (de) * 1980-06-06 1986-03-14
FR2493549A3 (fr) * 1980-10-31 1982-05-07 Kieninger & Obergfell Montre ou pendulette electrique, notamment a quartz avec dispositif de reglage de position des aiguilles
CH649189GA3 (de) * 1981-12-28 1985-05-15
US4443112A (en) * 1982-09-29 1984-04-17 Timex Corporation Planetary gear for date mechanism in a wristwatch
CH674290GA3 (en) * 1988-06-17 1990-05-31 Watch face time zone areas display - displays place where particular time zone is operative, with time zone area actuated by wearer
CH681128B5 (de) * 1990-10-02 1993-07-30 Ebauchesfabrik Eta Ag
US5155712A (en) * 1992-04-20 1992-10-13 Timex Corporation Wheel and pinion assembly with friction drive/slip coupling for a timepiece
CH689710B5 (fr) * 1994-01-26 2000-03-15 Erard Raoul Henri Montre comprenant un organe indicateur complémentaire à l'affichage de l'heure.
ATE428958T1 (de) * 1999-08-04 2009-05-15 Piguet Frederic Sa Vorrichtung zur anzeige der gangreserve einer uhr
SG96702A1 (en) * 2001-11-13 2003-06-16 Glashuetter Uhrenbetrieb Gmbh Device for winding and setting the time of a timepiece such as a date-watch including a date disc
FR2867285B1 (fr) * 2004-03-03 2009-07-31 Benoit Espiau Montre
EP2252918B1 (de) * 2008-03-11 2011-10-05 Parmigiani Fleurier S.A. Koaxiales zeitmessungs-uhrwerk
FR2973125B1 (fr) * 2011-03-23 2013-05-10 Samep Montres Emile Pequignet Support pour organe d'affichage de mouvement horloger
EP2615506B1 (de) 2012-01-10 2014-06-25 Montres Breguet SA Vorrichtung zur Schnellkorrektur eines Anzeigesystems

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1673621B2 (de) * 1967-08-14 1971-12-16 Burg, Fred G., Los Angeles, Calif. (V.StA.) Einrichtung zur wahlweisen einstellung des stundenzeigers einer uhr auf die zeit einer bestimmten zeitzone
CH494997A (fr) * 1967-11-03 1970-04-30 Centre Electron Horloger Mécanisme de mise à l'heure
US3503203A (en) * 1967-11-14 1970-03-31 Bulova Watch Co Inc Two-zone timepiece
DE1933049B2 (de) * 1969-06-30 1971-09-30 Durowe Gmbh, 7530 Pforzheim Weltzeituehr
CH765671A4 (de) * 1971-05-26 1972-12-29

Also Published As

Publication number Publication date
DE2963613D1 (en) 1982-10-28
EP0008832A2 (de) 1980-03-19
CH617815GA3 (de) 1980-06-30
CH617815B (de)
US4259735A (en) 1981-03-31
EP0008832A3 (en) 1980-04-02
JPS5537996A (en) 1980-03-17

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