EP3182215A1 - Oscillating system for timepiece - Google Patents

Abstract

A clockwork oscillating system (S) comprising a base plate (1), at least two mass elements (2), a spiral (3), and a shaft (6), does not include any riff.

Description

Technical area

The invention relates to a vibration system for a movement according to the preamble of claim 1 and a movement according to the independent claim.

State of the art

Oscillation systems for mechanical movements typically include restlessness, with restlessness typically encompassing a rash.

• Der Unruhreif wird in einer sogenannten Kalotte zuerst als Drehling hergestellt. In die Mitte des Drehlings wird dann eine Bohrung eingebracht. Diese wird dann typischerweise für die Zentrierung benutzt, beispielsweise um Speichen ausstanzen zu können. Es versteht sich von selbst dass diese Zentrierung ein gewisses Spiel aufweist, wodurch die Speichen nicht absolut zentriert sind und wodurch somit eine Unwucht in der Unruhe entsteht. Ausserdem verzieht sich die Kalotte typischerweise leicht beim Abtrennen von der Stange (welche typischerweise als Rohmaterialstange mit einem Durchmesser von z. B. 14 mm und einer Länge von z. B. 3 m vorliegt) durch den Hinterschnitt, bedingt durch die Materialspannungen die sich dann lösen bei den unterschiedlichen Stärken. Im Endeffekt führt somit die Tatsache, dass der Unruhreif zumindest teilweise mittels Drehens gefertigt werden muss, dazu, dass die Unruhe fertigungsbedingt eine gewisse Unwucht hat.

Usually riots are produced as follows:

• The riffraff is first produced in a so-called dome as a rotary ring. In the middle of the rotary ring then a hole is introduced. This will then typically used for centering, for example, to punch out spokes. It goes without saying that this centering has a certain play, whereby the spokes are not absolutely centered and thus an unbalance arises in the unrest. In addition, the calotte typically also tends to warp when severed from the rod (which is typically present as a raw material rod with a diameter of, for example, 14 mm and a length of, for example, 3 m) through the undercut due to the stresses of the material solve with the different strengths. In the end, therefore, the fact that the rag-fart must be made at least partially by turning leads to the fact that the restlessness due to production has a certain imbalance.

Alternatively, it is also possible to manufacture the entire unrest with a set-up on a machining center, eg a milling machine. This is more of a solution for smaller series and the work cycles on the machine used are typically quite long compared to the method discussed above, e.g. In the range of 15 minutes. In this case too, however, deformations typically occur, namely, for example, during separation and / or due to the release of the material tension.

In addition, mechanical watch vibration systems typically include a helix. The required spirals are typically made from a mostly drawn rod. Initially, a starting material is initially reduced from about 30 cm to about 6 mm in diameter and then brought to the required mass, often only to a blade thickness of 0.03 to 0.04 mm (with a manufacturing tolerance of 1/10 1/1000 mm) at one Height 0.10 to 0.20 mm, and then, after a thermal treatment and shortening to the required length by means of a tool which winds several of these strips in a drum, to be brought into the typical spiral shape.

Even in the drum, the spiral is then thermostabilized. Very good homogeneities can be achieved with production lots using modern production methods, but nevertheless the force ratios vary from one spiral to the other. In addition, the production lots differ too much from one another, so that there are too great differences from one batch to another.

After balancing the restlessness, which is necessary because of the production-related imbalance described above, the restlessness is typically placed on a special machine, which measures after a conscientious adjustment once the inertia of restlessness and automatically defines in which class the unrest is divided.

After the spiral to be used has been shortened in the middle in order to remove a hook which typically arises during winding, it is placed on a so-called spiral roll and pressed into place. Due to the design, the spiral is often slightly decentered, which has a detrimental effect on the movement of the watch. The spiral is then placed on a special machine, which in turn compares the force ratios of the spiral with a set value to then decide in which class the spiral must be divided.

Spirals and riots in the same class are then assembled together. The error rate is typically still quite high, if you want to achieve a precise restlessness. Although there is a pointer to correct it, its presence typically also causes some problems, and its effects are limited. Often it has to be moved too far and thus negatively influences the isochronism of the clock, ie the temporally even swinging of the restlessness at different oscillation ranges. A restlessness is isochronous if any Oscillation takes the same length regardless of the oscillation.

It turns out that there is a theoretical desire that all spirals in manufacturing have the same class as compound restlessness.

On the unrest is typically additionally pressed a so-called double role on a cone. Because of this double role, for friction reduction and hardness of the material, typically a small ruby, the so-called ellipse, is pressed in, which is cylindrical in principle, but has a surface on one side. It goes without saying, therefore, that neither its pressing nor the pressing on of the double roller constitute a problem-free operation.

The power of the gear train of the mechanical movement is typically transmitted by means of the so-called anchor from the train to the restlessness. In particular, the force is typically transmitted by means of two rubies from the last wheel of the gear train, the so-called escape wheel, via an ellipse on the restlessness. The anchor is typically made of steel to achieve the required hardness and is therefore often relatively heavy. The attachment of the rubies, the so-called pallets, is also typically problematic, whereby the positioning and above all the angular accuracy are particularly difficult. For manufacturing reasons, the geometry of the pallets is also limited.

Object of the invention

It is the object of the invention to remedy the above-mentioned prior art or mitigate. In particular, it is the object of the invention To create a vibrating system for a mechanical movement, which is simple in design, which is easy and inexpensive to manufacture, and yet which ensures the most accurate operation of the mechanical movement.

Solution of the task

The object is achieved by a vibration system according to claim 1. The invention is based on the finding that especially the presence of a riffraff makes the manufacturing process of the oscillating system very complicated, inter alia because at the necessary manufacturing steps, especially when turning, material stresses occur, which imbalances in to show unrest. These imbalances must then be rebalanced relatively expensive. The invention thus solves the problem, in principle, by the fact that the unruly, which is indeed part of the horological tradition, which however makes the production of vibration systems complicated, is omitted.

In advantageous embodiments, the base plate is substantially strip-shaped or substantially cross-shaped. Such base plate shapes have the advantage, unlike a traditional unruly riffraff, that they are easy to manufacture, especially with low stress manufacturing techniques. In principle, many manufacturing methods are suitable, with the exception of turning to make the base plate. The base plate is preferably produced by means of punching and / or laser cutting and / or water cutting and / or by means of the LIGA method, or by a combination of these methods. In principle, the base plate may be made by any method suitable for processing wafers.

In advantageous embodiments, the base plate comprises a middle part and at least two first legs. The first legs are typically arranged at a distance of 180 degrees around the central part, in other words, exactly opposite on opposite sides of the central part. The central part in this case comprises an axle bore and each of the first legs comprises a fastening bore for fastening in each case one of the at least two mass elements. Advantageously, the mounting holes are arranged in each case at the ends of the legs, ie on the middle part facing away from the legs. Such a construction of the base plate has the advantage that it is particularly simple, yet effective, because by the use of two mass elements from a same production lot very easy adaptation of the oscillating system to the spiral used or its class can be achieved. It is particularly advantageous if each of the first two legs comprises a longitudinal slot. By means of such longitudinal slots material savings in the region of the first leg can be achieved in an extremely simple manner, whereby their mass is reduced in the region of the longitudinal slots. Such mass reductions have an advantageous effect on the function of the vibration system, because they stabilize the vibration behavior. In addition, said longitudinal slots can improve a torsional rigidity of the base plate.

In advantageous embodiments, the vibration system comprises a fastening element for fastening the spiral to the base plate. The use of such a fastener has the advantage that no spiral roller is needed, whereby the structure of the vibration system and in particular the shaft is greatly simplified. In addition, this eliminates a pressing on the spiral roll, which typically leads to undesirable material deformations.

In advantageous embodiments, the fastening element is pin-shaped, wherein the base plate, in particular the middle part, preferably comprises a pin socket for receiving the fastening element. This embodiment has the advantage that it is particularly easy to manufacture and to complain. The pin is preferably soldered to the spiral and pressed into the pin socket. The pin socket, is preferably continuous and preferably designed as a bore.

In advantageous embodiments, the vibration system comprises a lever element. Such a lever element has the advantage that a connection to the armature of the mechanical movement can be realized particularly easily. An alternative to a lever element may be a corresponding embodiment of the armature and / or a double role.

In advantageous embodiments, the lever element is designed as a lever stone, particularly preferably as a lever ellipse, with particular advantage as a lever part ellipse cylinder, wherein the base plate, in particular the middle part, preferably comprises a lever socket for receiving the lever element. The lever is preferably pressed into the lever socket. The lever socket is preferably designed to be continuous, that hot it penetrates the base plate completely. Such an arrangement of lever and lever lever has the advantage that a horizontality between the lever element and anchor is particularly easy to ensure. Alternatively, however, it is also possible to use a differently designed lever element and / or to arrange the lever element differently, for example as part of the shaft or of a double roller.

In advantageous embodiments, the shaft comprises a single roller, which is preferably suitable to act as an integrated security role and / or to limit a movement of a safety knife. Such Design of the shaft has the advantage that the structure of the vibration system is massively simplified compared to a conventional restless, because it does not need a dual role.

In advantageous embodiments, the shaft comprises a first section, a second section, a third section and two bearing sections, wherein each of the bearing sections preferably comprises a first partial bearing section and a second partial bearing section. Such a design of the shaft is particularly advantageous because it allows an extremely simple production and minimizing manufacturing tolerances. In particular, the height clearance in this way is less susceptible to manufacturing tolerances, because by eliminating the double role is only one measure to be respected. By eliminating the double role is also minimized in particular the risk of the occurrence of material deformations.

In advantageous embodiments, the single roller comprises a recess, in particular a lateral recess, which is designed such that it is suitable to act as an integrated security role and / or to limit a movement of a safety knife of the mechanical movement. This recess is preferably designed teilelipsenförmig. The presence of such a single roll is advantageous because it simplifies the structure of the vibrating system.

In advantageous embodiments, the spiral comprises a concentric part and an Archimedean part, wherein the concentric part lies at least partially within the Archimedean part. This is advantageous because in a simple way a good centricity of the spiral is achieved, which helps to minimize gear errors.

In advantageous embodiments, the base plate comprises at least two second legs. The second legs are preferably arranged so alternately with the first legs around the central part, in particular in each case at an angular distance of 90 degrees, that a substantially cross-shaped base plate is formed. The presence of two second legs in addition to the two first legs has the advantage that additional adjustment possibilities for the vibration system can be created. This is particularly advantageous if no feedback is provided in the vibration system.

In advantageous embodiments, each of the second legs comprises an angle element, wherein each angle element preferably comprises an angular bore for receiving a set screw. This has the advantage that additional adjustment options for the oscillating system are created in a simple way. It is particularly preferred if two angular bores are provided in each angle element, so that two adjusting screws can be screwed into each angle element, in particular a large adjusting screw and a small adjusting screw. The advantage of having two set screws is that much larger class differences can be compensated than if only one set screw per angle element is available. Thus, then, for example, the use of relatively simple constructed standard spirals is possible and / or less stringent demands must be placed on the manufacturing tolerances of the spiral used.

In advantageous embodiments, each angle element comprises a slot which is adapted to cooperate with the angular bore such that a secure screwing of the adjusting screw is made possible in the angular bore. Advantageously, each angle element comprises two setscrews, two angle holes and two slots. It is particularly advantageous if one of the screws of each angle element is greater than the other, wherein the large screw is designed with advantage as a ground screw and wherein the small screw is designed with advantage as a regulating screw. It is particularly advantageous if the large adjusting screw is at least partially made of gold and / or if the small adjusting screw is at least partially made of copper or a copper alloy, in particular CuBe.

A movement according to the invention comprises an oscillating system according to the invention. An anchor of the movement and / or an escape wheel of the movement is or are made in ruby. This has an advantageous effect on the mass of the mechanical movement and on the prevailing friction conditions in it.

figure description

• Figur 1: erstes Ausführungsbeispiel eines erfindungsgemässen Schwingsystems in Explosionsansicht,
• Figur 2: perspektivische Ansicht einer erfindungsgemässen Welle,
• Figur 3: perspektivische Visualisierung eines erfindungsgemässen Masseelements und dessen Fixierung auf einer erfindungsgemässen Grundplatte,
• Figur 4: Seitenansicht des ersten Ausführungsbeispiels eines erfindungsgemässen Schwingsystems in fertig montiertem Zustand,
• Figur 5: zweites Ausführungsbeispiel eines erfindungsgemässen Schwingsystems in perspektivischer Ansicht, und
• Figur 6: drittes Ausführungsbeispiel eines erfindungsgemässen Schwingsystems in perspektivischer Ansicht.

In the following the invention will be explained in more detail with reference to drawings, in which:

• FIG. 1 : first embodiment of an inventive oscillation system in exploded view,
• FIG. 2 : perspective view of a shaft according to the invention,
• FIG. 3 : perspective visualization of a mass element according to the invention and its fixation on a base plate according to the invention,
• FIG. 4 : Side view of the first exemplary embodiment of a vibration system according to the invention in a completely assembled state,
• FIG. 5 : Second exemplary embodiment of an inventive oscillation system in a perspective view, and
• FIG. 6 : third embodiment of an inventive oscillation system in perspective view.

Description of preferred embodiments

FIG. 1 shows a first embodiment of an inventive oscillation system S for a mechanical movement in exploded view. In the FIG. 1 shown base plate 1 comprises a central part 7 and two first legs 8 (for the sake of clarity is in FIG. 1 only one of the two first legs 8, namely the right seen by the viewer, provided with a reference numeral). The base plate 1 is substantially strip-shaped, only in the region of the central part 7 and in the region of the respective ends of the two first leg 8 slight curves are present, which prevent the formation of burrs at least in part.

The base plate 1 comprises in the region of its central part 7 an axle hole 9, which is located in the geometric center of the base plate 1, and a pin socket 11 and a lever socket 12. Further, each of the two first leg 8 of the base plate 1 comprises a mounting hole 10 (the better Overview is in FIG. 1 only one of the two mounting holes 10, namely the one seen from the viewer left, provided with a reference numeral) and a longitudinal slot 25 (of which in turn only one of the two is provided with a reference numeral).

The oscillatory system S further comprises a shaft 6, on which the base plate 1 fastened, in particular attachable and / or can be pressed.

The oscillating system S further comprises a spiral 3. The spiral 3 comprises an inner concentric part 3a which, when the oscillating system S is mounted, runs concentrically around the shaft 6, and an Archimedean part 3b. In the manufacture of the oscillating system S, a fastening element 4, in particular a pin, is attached, in particular soldered, to an inner side of the spiral 3. This fastener 4 is in turn pressed into the pin socket 11, resulting in that the spiral 3 is connected to the base plate 1.

The oscillating system S further comprises two mass elements 2. Each of these mass elements 2 can be pressed into one of the two fastening bores 10 in order to connect the mass elements 2 to the base plate 1. For this purpose, each mass element 2 comprises a fastening bolt 26. The fastening bolts are in FIG. 1 however, not to be recognized, because they are arranged on the respective lower sides of the mass elements 2. There are mass elements 2 different size and mass used to optimally adapt any vibration system S to the force of each used spiral 3 can.

FIG. 2 shows a perspective view of a shaft 6 according to the invention. The shaft 6 comprises a single roller 13, a first section 14, a second section 15 and a third section 16. The first section 14 is adjacent to the single roller 13 and has the largest diameter of all sections , The diameter of the second portion 15 is smaller than that of the first portion 14 but larger than that of the third portion 16, which adjoins the second portion 15. The first portion 14 and the second portion 15 are approximately equal in length, and the third portion 16 is approximately twice as long as the first portion 14 and / or the second portion 15.

The term "length" refers to the axial direction of the shaft 6. At its two ends, the shaft 6 also includes a respective bearing section. Each of the two bearing sections comprises a first partial bearing section 17 and a second partial bearing section 18. From the bearing section located below the single roller 13 as viewed by the observer, only the second partial bearing section 18 can be seen. The second partial bearing section 18 is in each case longer than the first partial bearing section 17, but in each case has a smaller diameter. When mounted oscillating system S, the shaft 6 is guided through the axle hole 9, wherein the base plate 1 is seated on the first portion 14, wherein the second portion 15 is at least partially in the axle hole 9 and wherein the third portion 16 protrudes beyond the base plate 1 ( please refer FIG. 4 ). In FIG. 2 It can also be seen that the single roller 13 comprises a recess 19, which allows the single roller 13 to act as an integrated security roller and / or to limit movement of a safety knife of the mechanical movement.

FIG. 3 shows a perspective visualization of an inventive mass element 2 and its fixation on a base plate 1 according to the invention here. Now, the fastening bolt 26 can be seen on the underside of the mass element 2, which is suitable in the mounting hole 10 of FIG FIG. 3 to intervene fragmentary illustrated base plate 1.

FIG. 4 shows a side view of the first embodiment of an inventive vibration system S in the fully assembled state. Because of the better overview are in FIG. 4 not all components provided with reference numerals. The two mass elements 2 are pressed into the base plate 1. The shaft 6 passes through (as in the description of the FIG. 2 already explained), the base plate 1 in the middle. The lever element 5 is pressed from below into the base plate 1. The fastening element 4 is pressed from above into the base plate 1. On the fastening element 4, the spiral 3 is attached.

The already assembled oscillating system S has - as already mentioned - a multitude of advantages. On the one hand, it is possible to punch out the base plate 1 in one pass or to cut it out in one clamping. Thus, it becomes possible to manufacture a base plate 1 in absolute equilibrium, since at the same time the axle hole 9 for which the shaft 6 is mounted, as well as lever socket for receiving the lever element. 5

In addition, the mass elements 2, which are subsequently attached to increase the mass inertia and are typically manufactured in different dimensions, can be used to adapt the oscillating system S to the force ratios of the production lot of the spiral 3 in a particularly simple manner. By eliminating the turmoil, the vibration system S is also much freer from imbalances or problems of round and flat running than a classic restlessness.

Another advantage is that to some extent a part of the otherwise double role is directly attached to the shaft 6, and since the other part of the double role deleted by the direct pressing of the lever member 5 in the base plate 1 is a double role as a component no longer needed. Also, the spiral roll typically used in a classical restlessness is eliminated because the spiral 3 is mounted directly on the fastener 4, which in turn is pressed into the base plate. As a result, the total wave 6 of the vibration system S is greatly simplified compared to a classic restlessness. In addition, by eliminating the spiral roll, the shaft 6 does not have to be riveted, as is typically the case with a classic restlessness, but can simply be pressed into the base plate 1. Finally, another advantage results from the fact that the function of the ellipse is now integrated directly in the shaft 6. So that the friction ratio is right again, the anchor is then made in ruby. It is also advantageous if the escape wheel is performed in ruby, in particular for the case that z. B. an inhibitor with direct pulse, that is without an anchor used. In this case, the escape wheel drives the vibrating system directly, ie without an anchor. Another advantage of using these components in ruby is that they become lighter, which reduces the inertia of these components.

FIG. 5 shows a part of a second embodiment of an inventive oscillation system S in a perspective view. The vibration system S is in FIG. 5 shown without wave and without spiral. It can in principle be combined with the shaft 6 shown in the preceding figures and the spiral 3 likewise shown in the preceding figures. The vibration system S comprises a base plate 1, which is substantially cross-shaped. The base plate 1 comprises a middle part 7 with an axle hole 9, through which, when the oscillating system S is assembled, said shaft 6 is guided. From the middle part 7, two first legs 8 extend outwards (only one is in) FIG. 5 provided with reference numerals) at the ends of each a mass element 2 is mounted (only one is in FIG. 5 provided with reference numerals). The first leg 8 are arranged exactly opposite one another with respect to the central part 7. Also seen exactly opposite from the middle part of two second legs 20. Between each of a second leg 20 and a first leg 8 is in each case an angle of 90 degrees clamped. In other words, the first leg 8 and second leg 20 are arranged alternately and gelichmässig around the central part 7 around. Each second leg 20 comprises in the region of its respective end an angular element 21. Each angle element 21 comprises an angular bore 22 into which a set screw 23 can be screwed in such a way that a central axis of the set screw 23 extends at right angles to an axis of rotation of the oscillation system S passing through the shaft. The adjusting screws 23 are used for fine tuning of the oscillating system S. In addition, each angle element 21 also comprises a slot 24 which is suitable for interacting with the angular bore 22 in such a way that that a secure screwing the screw 23 into the angular bore 22 is made possible.

FIG. 6 shows a part of a third embodiment of an inventive oscillation system S in a perspective view. The third embodiment corresponds essentially to the second embodiment, wherein the angle elements are screwed in the third embodiment in the form of angular parts 27 on the second leg, whereas they are realized in the second embodiment by 90-degree bending of the ends of the second leg 20. In addition, each angle member 27 in the third embodiment, in addition to the already existing in the second embodiment of the adjusting screw 23, a second adjusting screw 28, which in each case a second slot 29 is assigned. In FIG. 6 only the components are provided with reference numerals, which are shown there for the first time.

The in the Figures 5 and 6 illustrated cross-shaped embodiments may be typically combined with all features of the first embodiment, for example with the fastener 4 and the lever member fifth

Claims (15)

Oscillation system (S) for clockwork, comprising: a base plate (1), at least two mass elements (2), - a spiral (3), and a wave (6), characterized in that - The oscillatory system (S) does not contain any ragwort. Oscillating system (S) according to claim 1, characterized in that the base plate (1) is substantially strip-shaped or substantially cross-shaped. Oscillating system (S) according to claim 2, characterized in that the base plate (1) comprises a central part (7) and at least two first legs (8), wherein the central part (7) comprises an axle bore (9) and wherein each of the first leg (8) comprises a fastening bore (10) for fastening in each case one of the at least two mass elements (2). Oscillating system (S) according to one of the preceding claims, characterized in that the oscillating system (S) comprises a fastening element (4) for fastening the spiral (3) to the base plate (1). Oscillating system (S) according to claim 4, characterized in that the fastening element (4) is pin-shaped, wherein the base plate (1), in particular the central part (7) preferably comprises a pin socket (11) for receiving the fastening element (4). Oscillation system (S) according to one of the preceding claims, characterized in that the oscillating system (S) comprises a lever element (5). Oscillating system (S) according to claim 6, wherein the lever element (5) is designed as a lever stone, particularly preferably as a lever ellipse, with particular advantage as a lever part ellipse cylinder, wherein the base plate (1), in particular the central part (7), preferably a lever socket (12). for receiving the lever element (5). Oscillating system (S) according to one of the preceding claims, characterized in that the shaft (6) comprises a single roller (13), which is preferably suitable to act as an integrated security role and / or to limit a movement of a safety knife. Oscillating system (S) according to any one of the preceding claims, characterized in that the shaft (6) comprises a first portion (14), a second portion (15), a third portion (16) and two bearing portions, wherein each of the bearing portions preferably one first partial bearing section (17) and a second partial bearing section (18). Oscillating system (S) according to one of claims 8 to 9, characterized in that the single roller (13) comprises a recess (19). Oscillating system (S) according to any one of the preceding claims, characterized in that the spiral (3) comprises a concentric part (3a) and an Archimedean part (3b). Oscillating system (S) according to one of claims 3 to 11, characterized in that the base plate (1) comprises at least two second legs (20). Oscillating system (S) according to claim 12, characterized in that each of the second legs (20) comprises an angular element (21), wherein each angle element (21) preferably comprises an angular bore (22) for receiving a set screw (23), wherein each angle element (21) preferably comprises a slot (24) which is adapted to cooperate with the angular bore (22) such that a secure screwing of the adjusting screw (23) in the angular bore (22) is made possible. Clockwork comprising a vibration system (S) according to one of claims 1 to 13. Clockwork according to claim 14, characterized in that an anchor of the movement and / or an escape wheel of the movement is made in ruby or are.

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