EP2975471A2 - Stossdämpfendes lager - Google Patents

Stossdämpfendes lager Download PDF

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Publication number
EP2975471A2
EP2975471A2 EP15176332.3A EP15176332A EP2975471A2 EP 2975471 A2 EP2975471 A2 EP 2975471A2 EP 15176332 A EP15176332 A EP 15176332A EP 2975471 A2 EP2975471 A2 EP 2975471A2
Authority
EP
European Patent Office
Prior art keywords
bearing
pivot
spring
return spring
module
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Withdrawn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
EP15176332.3A
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English (en)
French (fr)
Other versions
EP2975471A3 (de
Inventor
Cyrille Clot
Loïc Pellaton
Lucas Humair
Pierre Gygax
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.)
Manufacture et Fabrique de Montres et Chronometres Ulysse Nardin Le Locle SA
Original Assignee
Manufacture et Fabrique de Montres et Chronometres Ulysse Nardin Le Locle 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 Manufacture et Fabrique de Montres et Chronometres Ulysse Nardin Le Locle SA filed Critical Manufacture et Fabrique de Montres et Chronometres Ulysse Nardin Le Locle SA
Publication of EP2975471A2 publication Critical patent/EP2975471A2/de
Publication of EP2975471A3 publication Critical patent/EP2975471A3/de
Withdrawn legal-status Critical Current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
    • G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
    • G04B31/02—Shock-damping bearings
    • G04B31/04—Shock-damping bearings with jewel hole and cap jewel

Definitions

  • the present invention relates to the field of watchmaking. It relates, more particularly, an anti-shock bearing for a timepiece.
  • the document CH 707 344 discloses a plurality of so-called "floating" anti-shock bearings, in which the stones are supported by a spring of substantially crystalline material without a plastic regime, such as a monocrystalline or polycrystalline silicon-based material, based on sapphire, diamond-based, base of corundum, ruby, or the like.
  • This type of bearing has excellent anti-shock properties against axial and radial shocks, and can absorb large shocks without damaging the pins of the axis that supports the bearing.
  • the object of the invention is therefore to provide a bearing of the above kind, in which the risk of spring breakage is reduced without influencing the shockproof properties of the bearing.
  • the bearing further comprises a limiting spring located opposite said pivoting module on the side opposite to said opening, the limiting spring being situated out of contact with the pivoting module when the latter is in its position of rotation. rest, and forming a stop arranged to limit a movement of the pivot module towards the limiting spring.
  • This limitation spring does not influence the movement of the pivot module during normal operation of the bearing, and serves to limit the stress experienced by the return spring.
  • the limiting spring mainly provides a limit of travel limitation and also, to a lesser extent, additional shock absorption, which is applied progressively when the pivot module comes into contact with said limiting spring in the case of extreme axial shock.
  • the progressive application of the force provided by the limiting spring prevents the return spring and / or the pivot module from being subjected to an additional shock which could damage either one, either the other, or both, which would be the case when the pivot module would come into sharp contact with such a rigid stop.
  • the limiting spring comprises at least one end bearing against at least one contact surface of at least one lateral opening provided in said support member.
  • the limiting spring can be hooked to a hooking point formed by the lateral opening.
  • the limiting spring comprises at least one fin resting against a surface of said inner cavity and / or against a peripheral portion of said return spring.
  • a prestress is created by the at least one fin and the at least one end, the at least one fin extending preferably towards said return spring at a distance greater than the distance between said surface of contact and said peripheral portion of the return spring and / or said surface of the inner cavity respectively.
  • the return spring is held in the support by means of the limiting spring, which makes it easy to disassemble the bearing.
  • the return spring comprises a rigid peripheral portion, that is to say more rigid than the elastic portion of the return spring, which preferably has at least one lug which cooperates with positioning means provided in the support, said positioning means preferably comprising at least one notch of complementary shape to that of said lug.
  • the pivot module comprises at least one stone, normally a counter-pivot stone and / or a pierced stone.
  • the pivoting module comprises a kitten, the bearing being arranged in such a way that the kitten comes into contact with the limiting spring during an axial impact. Therefore, the stones themselves never come into contact with the limiting spring, and are thus protected from any scratches by the kitten.
  • the kitten comprises at least one shoulder bearing against a surface of the return spring, which may be a surface on the opposite side to the tigeron and / or a tung-side surface.
  • the shoulder may be for example a bearing, or may be formed by deformed material during a shore.
  • the kitten may also include a counter pivot stone which is located outside a plane defined by the return spring. A compact pivot module is therefore proposed.
  • one end of the limiting spring has two lugs each extending laterally and cooperating with said contact surface of said lateral opening to form a hinge, which prevents the limiting spring from escaping suddenly from the bearing during assembly and disassembly.
  • FIGS 1-4 illustrate a bearing 1 according to a particular embodiment of the invention.
  • This bearing 1 comprises a support 3.
  • This support 3 is shown as a cup comprising an internal cavity 5, the cup being intended to be secured to a frame member of a clockwork movement for example by driving, gluing, welding or similar.
  • a central opening 7 intended to receive a tigeron of a movable member (not shown), such as a balance shaft.
  • a pivot module 9 comprising elements intended to come into contact with the pivot during operation of the bearing 1.
  • these elements are, in the usual way, a counter-pivot stone 11 and a pierced stone 13, whose operation is well known and should not be repeated here.
  • the stones 11 and 13 are both supported by a kitten 15, in which they are driven, glued, or welded.
  • the stones 11, 13 are therefore integral with each other, and therefore move together in the case of a shock.
  • the pivot module 9 is secured to the return spring 19 via the kitten 15, which is riveted, driven, glued, clipped or welded in a central portion 17 of the return spring 19, formed in particular by an elastic portion comprising a plurality of turns 19a formed by spiral-shaped blades in a manner similar to that described in the documents WO 2009/060074 , EP 1 696 286 , EP 2 469 357 or CH 707 344 .
  • Other forms of alternative spring 19 are known, among others, in the documents CH403 429 , CH 235 315 and CH 309 235 . These forms, and any other suitable form known from the prior art, may also be used in the present invention.
  • the return spring 19 also comprises a relatively rigid outer portion 21, generally shaped ring, which serves to mount the return spring 19 in the 3.
  • the return spring 19 serves to position the pivot module facing the opening 7 in its rest position, as is generally known.
  • the kitten can support only the counter-pivot stone or the pierced stone, the other being supported otherwise, for example by means of an additional spring (see for example the document CH 254 854 ), or by means of a fastening with the support 3. Otherwise, a single stone of the "thrusting" type can be used.
  • the stone or stones 11, 13 may be secured to the return spring 19 other than by means of a kitten, for example by driving, gluing or welding, as described in the documents EP 2 469 357 and EP 1 696 286 .
  • one or the other of the stones 11, 13 may have come from one piece with the return spring, as is known from the documents WO 2009/060074 or EP 2 015 147 , which describes among other things an advantageous embodiment of a pivot module which comprises a stone coming from a room with its spring, the stone being generally of the type called "crapaudine" having a blind hole to receive the pivot.
  • the pivot module is of the type "without trigger threshold", that is to say completely floating in its rest position, without contact with the support.
  • the invention also applies to the so-called “trigger threshold” bearings, in which the pivot module 9 is in contact with another part, for example the surface of the internal cavity 5 of the support 3. Examples of such levels are disclosed by the documents US 1,396,570 , CH 403 429 , US 2,146,329 , WO 2009/060074 (See Figure 15 of this document), and should not be described in more detail here.
  • the bearing 1 comprises a limiting spring 23.
  • This limiting spring 23 comprises metal blades , polymers, silicum or the like having ends 23a, 23b which are attached to bearing surfaces 25a that comprise lateral openings 25 and which form notches under which said ends can be clipped.
  • the limiting spring 23 is subjected to a flexural prestress, which has the effect that it is convex, seen from the outside of the bearing.
  • the limiting spring 23 comprises fins 23c extending from the middle of the limiting spring 23, and bent towards the return spring 19.
  • the ends of the fins 23c bear against the outer portion 21 of the return spring 19, and the ends 23a, 23b are pushed downwards, that is to say in the direction of the return spring 19 to the against the stiffness of the limiting spring. Then, the ends 23a, 23b are hooked in the points of attachment 25.
  • the limiting spring 23 also serves to mount the return spring 19 in the support 3.
  • the outer portion 21 of the return spring 19 has two lugs 21a which take place in two complementary notches 3a provided in the support 3. These notches 3a serve not only to ensure the angular positioning of the return spring 19, but also to determine the positioning of the return spring 19 in the height of the cavity 5.
  • the fins 23c rest on the outer portion 21 of the return spring 19 in order to keep it in contact with the lower surface of the notches 3a, under the action of the force exerted by the deflection of the limiting spring 23.
  • the outer portion 21 of the return spring 19 can be split, at the level of one of the fins 23c (see Figures 5a and 6a ), at one of the lugs 21a (see figure 7 , where we clearly see the slot 21b and the arrangement of the blades 19a which form the turns of the elastic portion of the return spring 19) or at any other location.
  • This arrangement does not require particularly tight tolerances, which reduces manufacturing costs in comparison with a driven spring, which requires tighter tolerances.
  • disassembly of the bearing for cleaning or other maintenance is facilitated, because the return spring 19 can be detached from the support 3 without the need for disengagement, take-off or the like.
  • the limiting spring 23 can operate exclusively as a stop, without positioning operation of the return spring 19, for example in the case where the return spring 19 is driven, glued or welded in the cavity 5, and therefore n ' It does not need to be positioned by the limiting spring 23.
  • the fins 23c can abut against stops provided in the cavity 5, or the fins 23c can even be omitted, the prestress being provided by a buckling of the limiting spring 23 between attachment points 25 which are separated by a distance which is insufficient for the limiting spring to extend flat.
  • FIGS. 5a, 5b, 6a and 6b illustrate two other variants of an anti-shock bearing according to the invention, which differ from that of Figures 1 to 4 by the shape of the limiting spring 23.
  • the shape of the limiting spring 23 is more angular than that of the Figures 1 to 4 , and its end 23b is rectangular.
  • the limiting spring 23 has a less angular shape than the Figures 5a and 5b its end 23b being pointed in order to facilitate its insertion into the lateral opening 25.
  • Bearing 1 illustrated in these figures differs from those of Figures 1 to 6 exclusively as regards the shape of the limiting spring 23.
  • one of the ends 23b of the limiting spring 23 resumes the conventional hinge shape of the "Incabloc®” type return spring, which has two lugs 23d (only one of which is illustrated on the figures 8 and 10 ), extending on either side of the end 23b.
  • These lugs 23d cooperate with the contact surfaces 25a of the corresponding lateral opening 25 to form a hinge.
  • This hinge facilitates, as is the case with the bearing "Incabloc®", the mounting of the limiting spring 23.
  • the watchmaker can hook the lugs 23d in the lateral opening 25, and then pivot the limiting spring around the hinge thus formed by the interaction between these elements.
  • the limiting spring is stretched by hooking its opposite end 23a in the corresponding lateral opening 25, the fins 23c bearing against the peripheral portion 21 of the limiting spring 23.
  • the part of the limiting spring 23 against which the pivot module 9 abuts in the event of extreme axial impact namely the abutment zone 23f
  • the abutment zone 23f is formed substantially in a point adjacent to each of the fins 23c, and is superimposed on a part of the pivot module 9, namely the kitten 15 in the variant shown here.
  • it is exclusively the abutment zones 23f and the ends of the fins 23c which come into contact with the kitten 15 of the bearing 1.
  • This configuration allows to leave visible a large part of the kitten and part of the spring of recall 19, thus conferring a particular aesthetic and interesting, unencumbered by the limitation spring 23.
  • hinge and the abutment stop zone can be applied independently of one another.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Springs (AREA)
  • Electromechanical Clocks (AREA)
EP15176332.3A 2014-07-14 2015-07-10 Stossdämpfendes lager Withdrawn EP2975471A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH01065/14A CH709867B1 (fr) 2014-07-14 2014-07-14 Palier antichoc pour pièce d'horlogerie.

Publications (2)

Publication Number Publication Date
EP2975471A2 true EP2975471A2 (de) 2016-01-20
EP2975471A3 EP2975471A3 (de) 2016-06-15

Family

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Family Applications (1)

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EP15176332.3A Withdrawn EP2975471A3 (de) 2014-07-14 2015-07-10 Stossdämpfendes lager

Country Status (2)

Country Link
EP (1) EP2975471A3 (de)
CH (1) CH709867B1 (de)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1396570A (en) 1921-02-03 1921-11-08 Kenneth B Glenn Floating jewel-bearing
US2146329A (en) 1936-01-09 1939-02-07 Colomb Henri Cap jewel bearing for clockwork mechanism
CH235315A (fr) 1942-09-30 1944-11-30 Erismann Schinz Sa Pare-choc pour pièce d'horlogerie.
CH254854A (fr) 1946-02-11 1948-05-31 Erismann Schinz S A Palier pare-chocs pour mobile d'horlogerie.
CH309235A (fr) 1953-04-09 1955-08-31 Walther Otto Palier amortisseur de chocs pour arbre de mobile d'horlogerie.
CH403429A (fr) 1963-04-08 1965-11-30 Matthey Roger Palier amortisseur de chocs pour mobile de petite mécanique
EP1696286A1 (de) 2005-02-23 2006-08-30 ETA SA Manufacture Horlogère Suisse Stoßdämpfende Uhrenlagerung
EP2015147A2 (de) 2007-07-12 2009-01-14 Manufacture et fabrique de montres et chronomètres Ulysse Nardin Le Locle SA Stoßdämpfer-Gleitlager für eine Uhr
WO2009060074A1 (fr) 2007-11-07 2009-05-14 Manufacture et fabrique de montres et chronomètres, Ulysse Nardin Le Locle S.A. Palier amortisseur de chocs pour piece d'horlogerie
EP2469357A1 (de) 2010-12-21 2012-06-27 The Swatch Group Research and Development Ltd. Stoßdämpfer-Gleitlager für eine sich drehende Triebfeder einer Uhr
CH707344A2 (fr) 2012-12-07 2014-06-13 Manuf Et Fabrique De Montres Et Chronomètres Ulysse Nardin Le Locle S A Palier antichoc et pièce d'horlogerie comportant un tel palier.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH251926A (fr) * 1943-11-03 1947-11-30 Zurcher Roger Dispositif de palier pare-choc pour mobile d'horlogerie.
FR1263235A (fr) * 1959-12-10 1961-06-09 Seitz & Co Pivot saphir-rubis industriel et pare-choc à caractéristique non rectiligne
FR1390721A (fr) * 1964-04-13 1965-02-26 Giese Kg C Dispositif de support élastique d'une pointe d'axe de rotation

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1396570A (en) 1921-02-03 1921-11-08 Kenneth B Glenn Floating jewel-bearing
US2146329A (en) 1936-01-09 1939-02-07 Colomb Henri Cap jewel bearing for clockwork mechanism
CH235315A (fr) 1942-09-30 1944-11-30 Erismann Schinz Sa Pare-choc pour pièce d'horlogerie.
CH254854A (fr) 1946-02-11 1948-05-31 Erismann Schinz S A Palier pare-chocs pour mobile d'horlogerie.
CH309235A (fr) 1953-04-09 1955-08-31 Walther Otto Palier amortisseur de chocs pour arbre de mobile d'horlogerie.
CH403429A (fr) 1963-04-08 1965-11-30 Matthey Roger Palier amortisseur de chocs pour mobile de petite mécanique
EP1696286A1 (de) 2005-02-23 2006-08-30 ETA SA Manufacture Horlogère Suisse Stoßdämpfende Uhrenlagerung
EP2015147A2 (de) 2007-07-12 2009-01-14 Manufacture et fabrique de montres et chronomètres Ulysse Nardin Le Locle SA Stoßdämpfer-Gleitlager für eine Uhr
WO2009060074A1 (fr) 2007-11-07 2009-05-14 Manufacture et fabrique de montres et chronomètres, Ulysse Nardin Le Locle S.A. Palier amortisseur de chocs pour piece d'horlogerie
EP2469357A1 (de) 2010-12-21 2012-06-27 The Swatch Group Research and Development Ltd. Stoßdämpfer-Gleitlager für eine sich drehende Triebfeder einer Uhr
CH707344A2 (fr) 2012-12-07 2014-06-13 Manuf Et Fabrique De Montres Et Chronomètres Ulysse Nardin Le Locle S A Palier antichoc et pièce d'horlogerie comportant un tel palier.

Also Published As

Publication number Publication date
CH709867A1 (fr) 2016-01-15
CH709867B1 (fr) 2018-12-14
EP2975471A3 (de) 2016-06-15

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