EP3293583A1 - Hemmungsmechanismus - Google Patents

Hemmungsmechanismus Download PDF

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Publication number
EP3293583A1
EP3293583A1 EP16187711.3A EP16187711A EP3293583A1 EP 3293583 A1 EP3293583 A1 EP 3293583A1 EP 16187711 A EP16187711 A EP 16187711A EP 3293583 A1 EP3293583 A1 EP 3293583A1
Authority
EP
European Patent Office
Prior art keywords
wheel
release
disengagement
oscillator
mechanism according
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.)
Withdrawn
Application number
EP16187711.3A
Other languages
English (en)
French (fr)
Inventor
Dominique Renaud
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.)
Dominique Renaud SA
Original Assignee
Dominique Renaud SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dominique Renaud SA filed Critical Dominique Renaud SA
Priority to EP16187711.3A priority Critical patent/EP3293583A1/de
Priority to PCT/EP2017/072392 priority patent/WO2018046563A1/fr
Priority to EP17761283.5A priority patent/EP3510449B1/de
Publication of EP3293583A1 publication Critical patent/EP3293583A1/de
Withdrawn legal-status Critical Current

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    • 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
    • G04B15/00—Escapements
    • G04B15/06—Free escapements
    • 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
    • G04B15/00—Escapements
    • G04B15/14—Component parts or constructional details, e.g. construction of the lever or the escape wheel

Definitions

  • the present invention relates to the field of watchmaking. It concerns an escape mechanism and, more particularly, a free escape mechanism with direct impulses.
  • the escapement is an essential part of mechanical watch movements. It is usually placed between a cog and an oscillator. The train transmits to the exhaust a torque coming from the energy source, which maintains and counts oscillations of the oscillator.
  • the trigger escapement is the one of the two that has the best energy efficiency. On the other hand, it is sensitive to strong acceleration and shock with significant risks of galloping and tripping. As a result, the detent escapement is not widespread because it supports to be worn and difficult to mate with the high frequency oscillators, which tend today to prevail because of their better accuracy.
  • the anchor escapement does not know these risks but has the disadvantage of a higher energy consumption due to more shocks, inertia and greater friction at the anchor.
  • the present invention aims to overcome the aforementioned drawbacks by providing an exhaust that is compatible with the high accelerations of a high frequency oscillator and the constraints of a wrist carry while maintaining low power consumption.
  • the springs of the trigger rockers are designed to exert a low restoring force.
  • the increase in this restoring force would reduce the impact sensitivity and support high frequencies by accelerating the return of the rocker in its rest position but would have the disadvantage of increasing the energy consumption during release.
  • the present invention implements a particular escape mechanism in which one seeks to recover the energy necessary for the release rather than to reduce it. Like any escapement trigger, this mechanism has a single rest position, the release and the impulse occur alternately out of two, the other being a lost shot.
  • a first embodiment of an escape mechanism according to the invention is presented on the Figures 1 to 6 .
  • the mechanism comprises a wheel mobile 1 kinematically connected to an escape wheel 2 and forming with it a train driven by a motor member not shown, typically a cylinder.
  • the escape wheel has teeth pulse 3 for periodically giving a pulse to an oscillator here taking the form of a balance of which only the plate 4 and the pin 5 are shown.
  • the moving wheel 1 comprises resting studs 6 arranged in a circle at the end of radially extending arm.
  • the exhaust mechanism further comprises a release wheel 7 in the form of a wheel pivoted on the same axis as the escape wheel.
  • the release mobile 7 comprises idle pins 8 and a unidirectional drive device formed by flexible blades 9 extending radially and bearing against ratchet stops 10 in their rest position.
  • the ratchet stops 10 are adjacent to the rest pins but could be otherwise as will be discussed later.
  • the angular amplitude of the rotation of the disengagement wheel 7 with respect to the escape wheel 2 is limited by a positioning stop 11, integral with the disengagement wheel 7.
  • a return spring 12 arranged between the escape wheel 2 and the release wheel 7 tends to bring the release wheel 7 into an angular position defined with reference to the escape wheel 2.
  • the figure 2 represents the exhaust mechanism at rest, the rocker has just traveled freely the additional arc and the pin 5 preparing to come into contact with a flexible blade 9 of the release mobile 7. The wheel is stopped, a resting stud 6 of the wheelhouse being in abutment against a rest pin 8 of the release wheel 7.
  • the figure 3 represents the escape mechanism during the disengagement phase during which the disengagement wheel 7 moves from an engagement position to a disengagement position under the pulse of the beam transmitted through the flexible blade 9.
  • the flexible blade 9 is in abutment against the pawl stopper 10 by forming a ratchet mechanism so that the balance of the impulse causes the rotation of the disengagement device 7 in the counterclockwise direction as shown in the figures.
  • the surfaces rest pin 6 and rest pin 8 slide against each other.
  • the contact surfaces of the rest pins 8 are circular base cylinder portions coaxial with the pivot axis of the disengagement wheel 7 so that the disengagement of the disengagement wheel 7 does not cause in advance This configuration corresponds to a draw angle of zero.
  • the surface of the rest pins could have a positive pulling angle to secure the locking of the release wheel 7 or a negative draw angle to facilitate its release.
  • the wheel set 1 is impeded in its rotation and does not transmit engine torque to the escape wheel 2 which remains in its waiting position .
  • the release wheel 7 pivots with reference to the escape wheel 2 and the return spring 12 accumulates, in elastic form, kinetic energy from the beam.
  • the flexible arms 9 and the rest pins 8 are arranged radially in a regular angular distribution so that the release wheel 7 is balanced on its axis of rotation and, as a result, insensitive to the accelerations experienced by the timepiece. Furthermore, the return spring 12 tends to keep the release member 7 abuts against the escape wheel 2 in its engagement position. Thus it is not necessary to provide a positive draft angle to further secure the release mobile 7 which minimizes the disturbances caused to the oscillator during release.
  • the figure 4 represents the escape mechanism in the pulse phase.
  • the figure 5 represents the escape mechanism at the end of the impulse phase and immediately before the stoppage of the train caused by the meeting of a rest pin 6 with a rest pin 8.
  • the circular trajectories of the rest pins and rest pins are intersecting and the mechanism is arranged so that a stud 6 encounters a pin 8 when the release mobile 7 is in the engagement position, that is to say when the escape wheel 2 has caught up the release wheel 7, the positioning abutment 11 bears against the escape wheel 2. Therefore, the advance of the train is limited when the disengagement wheel is in the engagement position.
  • the figure 6 represents the escape mechanism at rest at the moment of the blow lost during the next alternation.
  • the rocker pivots counterclockwise and the pin 5 spreads the flexible arm 9 without rotating the release member 7.
  • the flexible blade 9 constitutes with the ratchet stop 10 a unidirectional ratchet type drive system.
  • the back of the impulse teeth has a circular profile matching the shape of the balance plate to prevent the accidental recoil of the escape wheel while the pendulum traverses the additional arc.
  • the wheel is driven by a dual motor: the motor that propels the wheel in a conventional manner, and the return spring 12 which tows the escape wheel 2 when it starts.
  • the action of the return spring 12 is all the more effective as it is fixed on the release mobile 7 which is itself rotated by the oscillator.
  • a portion of the energy contributing to the acceleration of the train comes from the oscillator which goes against the generally accepted idea that we must avoid braking the oscillator not to disturb its isochronism and limit energy consumption.
  • the transfer of energy from the oscillator to the wheel is optimized thanks to the release mobile 7 and the return spring 12 which acts as a damper and limits the loss of energy at the time of the impact of the ankle on the flexible arm.
  • the acceleration of the wheel is therefore given smoothly but as it is stronger than that which would be given by a single drive member, the time required for the escape wheel 2 to catch the pin 5 of the balance is reduced.
  • the device can operate at higher frequencies but also that the pulse angle traveled by the pendulum in the pulse phase is greater.
  • the stop of the gear is caused by the meeting of two movable elements with reference to the frame, kinematically linked in a discontinuous way.
  • the release mobile Unlike a trigger rocker that reciprocates by dissipating the energy it receives from the balance, the release mobile always pivots in the same direction which is also that of the pulse given by the oscillator as well as that of the displacement of the escape wheel.
  • the energy accumulated in elastic form at each release in the return spring is restored when starting the escape wheel.
  • the recovery of a part of the energy taken from the oscillator in the release phase characterizes a new type of exhaust that can be designated by the term "turbo-relaxation", which presents interesting performances. in terms of energy efficiency as well as frequency and reliability of operation.
  • the rocker plate comprises a peg which makes the release and a pulse pad, separate from the peg, arranged to receive the impulse of the escape wheel.
  • the respective angular and radial positions of the peg and the pallet relative to the axis of the beam define the beginning of the release and pulse phases and the angular clearance and pulse rates.
  • the angular velocity of the escape wheel is higher than the speed reached by the escape wheel at the beginning of the pulse.
  • the mechanism of Exhaust according to the invention can be arranged in such a way that the kinetic energy acquired by the disengaging wheel during the disengagement phase is at least partially restored and contributes to the acceleration of the wheel.
  • the unidirectional driving device could be placed on the oscillator.
  • the release mobile could be connected to the escape wheel by flexible elements.
  • the release movement of the release mobile under the action of the oscillator could be likened to a rotation or any other path adapted to the release of the rest pins.
  • These same flexible elements could also play the role of return spring.
  • the Figures 7 to 12 represent a second embodiment of an escape mechanism according to the invention.
  • a cogwheel formed of a cogwheel 1 and an escapement wheel 2 kinematically connected to each other and a rocker of which the plate 4 provided with 5.
  • the mechanism also comprises a unidirectional drive device consisting of a plurality of flexible blades 9 abutting on pawl stops 10.
  • the unidirectional drive device is here mounted integral with the escape wheel 2. In an original way the escape wheel is not pivoted on the frame of the timepiece but on the release wheel 7 which here takes the form of a rocker pivoted on the same axis as the moving wheel 1.
  • the mechanism also comprises a positioning stop 11 adapted to position the release member 7 in an engagement position in which the rotation of the escape wheel is limited.
  • a positioning stop 11 adapted to position the release member 7 in an engagement position in which the rotation of the escape wheel is limited.
  • the figure 9 represents the escape mechanism in the disengagement phase.
  • the plate pin 5 has hit a flexible blade 9 resting on a pawl stop 10.
  • the rotation of the escape wheel 2 being hampered by the pallet rest 13, it is composed of the release mobile 7 , the escapement wheel 2 and the moving wheel 1 which is rotated in the counterclockwise direction about the pivot axis of the wheel set.
  • the decline of the wheels in the phase of disengagement causes the re-arming of the drive member so that the energy provided by the oscillator during the release is stored in elastic form by the drive member before being restored to propel the train.
  • the escape wheel 2 and the wheel are released.
  • the train accelerates and the release wheel 7 returns to its position of engagement against the positioning stop 11.
  • the rest plane of the pallet of rest is preferably an orthoradial plane with reference to the axis of rotation of the release mobile which corresponds to a zero draw angle.
  • the rest plane may have a different inclination or a non-rectilinear profile.
  • the figure 10 represents the escape mechanism in the impulse phase after the release mobile 7 has returned to its engagement position bearing against the positioning stop 11 and a pulse tooth 3 of the escape wheel 2 caught the peg 5 of the pendulum.
  • the figure 11 represents the mechanism at the end of the impulse phase and just before the stoppage of the train caused by the meeting of the impulse tooth 3 with the pallet rest 13.
  • the figure 12 shows the mechanism at rest during the blow lost at the return of the balance at the time of passage of the ratchet.
  • the energy provided by the oscillator during the release is at least partially restored to drive the wheel.
  • this second embodiment directly uses the drive member to temporarily store, in elastic form, the energy from the oscillator during the release. It is also the driving force that keeps the release mobile 7 in the engagement position. Note that in the exhausts of the prior art, the gear back slightly back on release when the draft angle is positive, this provision for the purpose of securing the trigger and not to recover energy.
  • the unidirectional drive device could have only one pawl and be integral with the release mobile or the oscillator.
  • the release and impulse functions could be provided by separate teeth on the escape wheel and by separate vanes on the oscillator.
  • the escape mobile could be translated rather than rotated. It could also be connected to the frame by a flexible element.
  • the release mobile could comprise a counterweight so that the moving assembly that it composes with the escape wheel is balanced on its axis of rotation.
  • the mechanism could comprise a second stop for limiting the amplitude of the movement of the disengagement wheel and a return spring to accelerate the return of the disengagement wheel in its engagement position.
  • the mechanism could also include a safety device that would limit the movement of the disengagement wheel in the free oscillation phases of the oscillator.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission Devices (AREA)
EP16187711.3A 2016-09-07 2016-09-07 Hemmungsmechanismus Withdrawn EP3293583A1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP16187711.3A EP3293583A1 (de) 2016-09-07 2016-09-07 Hemmungsmechanismus
PCT/EP2017/072392 WO2018046563A1 (fr) 2016-09-07 2017-09-06 Mecanisme d'echappement
EP17761283.5A EP3510449B1 (de) 2016-09-07 2017-09-06 Hemmungsmechanismus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16187711.3A EP3293583A1 (de) 2016-09-07 2016-09-07 Hemmungsmechanismus

Publications (1)

Publication Number Publication Date
EP3293583A1 true EP3293583A1 (de) 2018-03-14

Family

ID=56883736

Family Applications (2)

Application Number Title Priority Date Filing Date
EP16187711.3A Withdrawn EP3293583A1 (de) 2016-09-07 2016-09-07 Hemmungsmechanismus
EP17761283.5A Active EP3510449B1 (de) 2016-09-07 2017-09-06 Hemmungsmechanismus

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP17761283.5A Active EP3510449B1 (de) 2016-09-07 2017-09-06 Hemmungsmechanismus

Country Status (2)

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EP (2) EP3293583A1 (de)
WO (1) WO2018046563A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020015889A1 (de) * 2018-07-20 2020-01-23 Creaditive Ag Hemmungssystem und das hemmungssystem umfassendes messgerät
US20210141340A1 (en) * 2018-07-02 2021-05-13 Complitime Sa Timepiece escapement mechanism
EP4250019A1 (de) * 2022-03-21 2023-09-27 Patek Philippe SA Genève Uhr-oszillator für ein ultraflaches uhrwerk

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1538491A1 (de) * 2003-12-04 2005-06-08 Montres Breguet S.A. Chronometerhemmung für Uhren
EP1538490A1 (de) * 2003-12-04 2005-06-08 Montres Breguet S.A. Chronometerhemmung für Armbanduhren
EP1710636A1 (de) * 2005-04-06 2006-10-11 Daniel Rochat Hemmung für eine Uhr
EP1770452A1 (de) * 2005-09-30 2007-04-04 Peter Baumberger Chronometerhemmung für Uhren
EP2199875A2 (de) * 2008-12-16 2010-06-23 Rolex Sa Chronometerhemmung
CH704151B1 (fr) * 2009-09-14 2016-02-29 Seiko Instr Inc Echappement à détente et montre mécanique intégrant celui-ci.

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1538491A1 (de) * 2003-12-04 2005-06-08 Montres Breguet S.A. Chronometerhemmung für Uhren
EP1538490A1 (de) * 2003-12-04 2005-06-08 Montres Breguet S.A. Chronometerhemmung für Armbanduhren
EP1710636A1 (de) * 2005-04-06 2006-10-11 Daniel Rochat Hemmung für eine Uhr
EP1770452A1 (de) * 2005-09-30 2007-04-04 Peter Baumberger Chronometerhemmung für Uhren
EP2199875A2 (de) * 2008-12-16 2010-06-23 Rolex Sa Chronometerhemmung
CH704151B1 (fr) * 2009-09-14 2016-02-29 Seiko Instr Inc Echappement à détente et montre mécanique intégrant celui-ci.

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210141340A1 (en) * 2018-07-02 2021-05-13 Complitime Sa Timepiece escapement mechanism
US11988993B2 (en) * 2018-07-02 2024-05-21 Complitime Sa Timepiece escapement mechanism
WO2020015889A1 (de) * 2018-07-20 2020-01-23 Creaditive Ag Hemmungssystem und das hemmungssystem umfassendes messgerät
US20210286320A1 (en) * 2018-07-20 2021-09-16 Creaditive Ag Escapement system and measuring device comprising said escapement system
JP2021531479A (ja) * 2018-07-20 2021-11-18 クレアディティヴ・アーゲー 脱進機システム及びこれを備える測定装置
JP7441835B2 (ja) 2018-07-20 2024-03-01 クレアディティヴ・アーゲー 脱進機システム及びこれを備える測定装置
US12032334B2 (en) * 2018-07-20 2024-07-09 Creaditive Ag Escapement system and measuring device comprising said escapement system
EP4250019A1 (de) * 2022-03-21 2023-09-27 Patek Philippe SA Genève Uhr-oszillator für ein ultraflaches uhrwerk

Also Published As

Publication number Publication date
EP3510449A1 (de) 2019-07-17
EP3510449B1 (de) 2020-07-08
WO2018046563A1 (fr) 2018-03-15

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