Classifications

• • G—PHYSICS
  • G04—HOROLOGY
  • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
  • G04B17/00—Mechanisms for stabilising frequency
  • G04B17/20—Compensation of mechanisms for stabilising frequency
  • G04B17/28—Compensation of mechanisms for stabilising frequency for the effect of imbalance of the weights, e.g. tourbillon
  • G04B17/285—Tourbillons or carrousels

Definitions

• the invention relates to a tourbillon, or a tourbillon module, and a clockwork with a tourbillon mechanism according to the preamble of the independent claims.
• the balance and the locking mechanism are mounted on the turntable.
• the axis of the balance (balance axis) is mounted entirely or at least on one side outside the bogie.
• the balance and the locking mechanism are on the same side of the platform of the bogie, which leads to a one-sided weight concentration, which has a certain negative influence on the accuracy of the watch.
• Another disadvantage is that due to the often nested design assembly and maintenance of the tourbillon are difficult.
• the balance axis has a limited length, which has a negative effect on the load on the bearings.
• the tourbillon according to the invention has a two-sided structure.
• a central main bearing which serves to support the entire bogie, or the bogies, or platforms, is sandwiched in a vertical direction (with respect to the longitudinal direction of the balance axis) between balance and escapement.
• the main bearing of the tourbillon is preferably a ball or plain bearing. This arrangement makes it possible to achieve an optimally balanced mass balance of the rotating parts of the tourbillon.
• the main bearing has a sleeve-shaped main axis with a continuous opening, which forms an integral part of the bearing or is designed as a separate part.
• the main axis connects two platforms (bogies) opposite each other with respect to the central main bearing.
• a balance consisting of a balance wheel and a balance spring, is arranged on one platform, and an inhibiting mechanism is arranged on the opposite platform.
• the balance and the locking mechanism are operatively connected to each other via a balance axis that runs inside the main bearing.
• the balance axis is preferably supported by two opposite balance bearings, which are held by means of bridge structures arranged on the two opposite platforms.
• At least one of the platforms preferably has an external toothing which is used for coupling to a clockwork train.
• the described construction of a tourbillon according to the invention enables a modular, double-sided construction.
• the entire tourbillon mechanism is combined in one module, which can be separated from the rest of the movement in a simple manner.
• a module it is possible to arrange the tourbillon in the movement so that it can be detached from it freely without having to dismantle a large number of components of the watch.
• the module is set up separately from the clockwork and can only be inserted at the end when the clock is assembled. Necessary tests and settings can thus be carried out independently.
• a further embodiment has only one platform, on one side of which the balance with the balance spring and on the other side of the locking mechanism are arranged. The central platform has an opening through which the balance axis runs.
• a bridge construction is arranged on each side of the platform, which is used to hold the opposite balance bearings.
• the balance bearings are either centered or eccentric with respect to the platform. In the case of an eccentric arrangement, an additional circular movement is superimposed on the balance.
• the platform preferably has an external toothing, which is used for coupling to a gear train of a clockwork. Another active connection is possible.
• this embodiment has two opposite main bearings, which are preferably operatively connected to the bridge constructions and are arranged essentially at the level of the balance bearings. In certain embodiments, a coaxial arrangement of the balance bearings and the two main bearings is preferred. By accepting a one-sided mass distribution, there is the possibility of one-sided storage with only one bearing.
• the balance axles have a maximized length because they extend over the entire height of the tourbillon. This has a positive effect on the load on the balance bearings, since the reaction forces arising as a result of the moments that occur are comparatively less. This makes it possible to make them smaller.
• the two-sided tourbillon according to the invention enables a clock with a two-sided, respectively.
• this construction offers the advantage that all essential parts of the tourbillon, in particular escapement, balance, balance spring and balance adjustment mechanism, as well as main and balance bearings for inspection, maintenance and adjustment are freely accessible.
• At least one of the platforms is preferably detachably connected to the main axis. This makes it possible to easily assemble and maintain the tourbillon or main bearing.
• the balance bearings are integrated in the sleeve-shaped main axis. This offers the possibility to dispense with the external bridge constructions, so that the view of the balance and the locking mechanism are even better.
• At least one of the balance bearings is stationary, i.e. not rotatably connected to a base of the tourbillon or the clockwork.
• FIG. 1 shows a perspective view of a two-sided tourbillon mechanism, uneven-sided
• Fig. 2 is a perspective view of the two-sided tourbillon mechanism according to
• FIGS. 1 and 3 shows a section through the two-sided tourbillon mechanism according to FIGS. 1 and
• Figure 1 shows a two-sided tourbillon mechanism 1 in a perspective view seen obliquely from above.
• the embodiment shown is a tourbillon mechanism 1 which has a modular structure, respectively. is designed as a module that can be easily separated from the clockwork (not shown) and used again.
• the clockwork has a preferably continuous opening in the board, which corresponds to the external dimensions of the tourbillon mechanism 1, in particular the diameter of the larger platforms 2.
• the tourbillon mechanism can also be permanently installed in a clockwork if required, but this makes assembly and assembly more difficult.
• a first platform 2 can be seen, on which three supports 4 are arranged, on which a first balance bearing holder 5 is fastened by means of three screws 9.
• a first balance bearing 6 is arranged, which serves to support one end of a balance axis 7 (see FIG. 3).
• the supports 4 and the balance bearing bracket 5 together form a first balance bearing bridge 8.
• a balance 3, with a balance wheel 10 and a balance spring 11, is arranged on the balance bearing axis 7.
• An inner end 45 (see FIG. 3) of the balance spring 11 is operatively connected to the balance 3.
• An outer end 46 of the balance spring 11 is operatively connected to the balance bearing bridge 8 in the area of a fastening point 13.
• a balance adjustment mechanism 12 is used to adjust the balance spring 1 1 or the balance 3.
• the first platform 2 has an external toothing 15 which, in the installed state of the tourbillon module 1, meshes with a gear train of a clockwork (neither of which is shown in detail).
• the tourbillon mechanism 1 is driven or the gear train of the watch is inhibited via the external toothing 15.
• Other or alternative active connections with a clockwork are possible.
• the first and the second platforms 2, 20, as well as the parts of the tourbillon mechanism 1 fastened / supported thereon, are rotatable about a first axis of rotation (main axis of rotation) zl via a main bearing 16 (see FIG. 3), which is fastened on a base 17 arranged.
• the base 17 has fastening means, here in the form of openings 18, which are used to fasten the tourbillon mechanism 1 or the tourbillon module in a clockwork (not shown in more detail).
• FIG 2 shows the tourbillon mechanism 1 of Figure 1 from the bottom.
• An inhibiting mechanism 21 is arranged on a second platform 20.
• An armature 22 is operatively connected to an armature wheel 23.
• the armature wheel 23 is arranged on an armature wheel shaft 24 which is rotatably mounted in two armature bearings 25.
• the armature wheel bearings 25 are fastened directly or indirectly on the second platform 20, so that the armature wheel shaft 24 is arranged to be rotatable relative to the second platform 20 about an axis of rotation z2.
• An armature pinion 26 is seated on the armature wheel shaft 24, which meshes with a fixed gear 27 mounted on the base 17 and here internally toothed.
• the armature 22 is fastened on an armature shaft 32 which is arranged in two armature bearings 33 so as to be rotatable about a third axis of rotation z3.
• the armature 22 has at its inner end oriented towards the balance bearing axis 7 a groove into which a pin (both not visible) which is aligned in the z direction and fastened on the balance bearing axis 7 engages.
• a pin both not visible
• an externally toothed gear can also be used, which is operatively connected to or integrated into the base 17.
• three second supports 28 are arranged here, which are used to fasten a second balance bearing bracket 29 by means of second screws 31.
• the second supports 28 and the balance bearing bracket 29 together form a second balance bearing bridge 30.
• the balance bearing bracket 29 is used here to hold a second balance bearing 34 and one of the two escape wheel bearings 25.
• the balance bearings 6, 34 are typically from the state of the art Technically known ruby bearings, which are used to support the balance axis 7 in the axial (z) and radial directions (x, y). A rotation around the axis of rotation zl is not hindered.
• the main bearing 16 is sandwiched between the two platforms 2, 20. With a corresponding configuration of the first and / or the second platform 20, the main bearing 16 is also largely freely accessible, at least in certain positions, so that maintenance and adjustment are possible.
• FIG. 3 shows a sectional view through the tourbillon mechanism 1 according to FIGS. 1 and 2. The cut is made in such a way that the two axes of rotation z1 and z2 lie in the sectional plane.
• the reference symbols correspond to the reference symbols used in FIGS. 1 and 2.
• the first and second platforms 2, 20 are rigidly connected to one another by a main axis 35.
• the main axis 35 is designed here as a sleeve and has a continuous opening 36.
• the balance axis 7 is arranged in the interior of the opening 36 and is rotatably supported at both ends in the first and in the second balance bearing 6, 34 about the axis z1.
• the main bearing 16 for the rotatable mounting of the main axis 35.
• An inner ring 37 of the main bearing 16 is fastened on the main axis 35.
• An adjusting ring 40 is used here to adjust the bearing play of the main bearing 16.
• Balls 39 provide an operative connection between the rotatably arranged inner ring 37 and a fixed outer ring 38 of the main bearing 16 forth.
• the outer ring 38 is connected to the base 17 of the tourbillon mechanism 1.
• bearings are suitable in certain embodiments. If necessary, plain bearings can be used, provided that their friction does not have a negative effect on the accuracy. Standard ball bearings are preferably used.
• the inner ring 37 of the ball bearing 16 and the main axis 35 can be formed in one piece if necessary.
• the main axis 35 and the balance bearing axis are arranged coaxially with the z-axis (axis of rotation zl).
• the balance wheel 10 is attached to the balance shaft 7.
• the balance wheel 10 is operatively connected on the one hand to an inner end 45 of the balance spring 11 and on the other hand via the balance axis 7 to the locking mechanism 21.
• An outer end 46 of the balance spring 1 1 is operatively connected to the balance bearing bridge 8 and the balance adjustment mechanism 12, which serves to adjust the balance spring 1 1 or the balance 10.
• the balance axis 7 is in the area of the second platform 20 with the locking mechanism 21, which has an armature 22 and an armature wheel 23 fixed on an armature wheel axis 24.
• the escape wheel axle 24 is rotatably mounted about a second axis z2 by means of two escape wheel bearings 25 fixedly arranged relative to the second platform 20.
• the tourbillon mechanism 1 is driven by means of the gear mechanism of the clockwork (not shown in detail) via the external toothing 15 of the first platform 2.

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• Physics & Mathematics (AREA)
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• Rolling Contact Bearings (AREA)
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Applications Claiming Priority (2)

Publications (2)

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• 2004
  • 2004-04-30 DE DE502004010073T patent/DE502004010073D1/de not_active Expired - Lifetime
  • 2004-04-30 US US10/554,904 patent/US7744271B2/en not_active Expired - Fee Related
  • 2004-04-30 WO PCT/CH2004/000265 patent/WO2004097533A2/fr active Application Filing
  • 2004-04-30 AT AT04730451T patent/ATE443283T1/de not_active IP Right Cessation
  • 2004-04-30 EP EP04730451A patent/EP1623282B1/fr not_active Expired - Lifetime

Non-Patent Citations (1)

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