EP3872577A1 - Mechanical timepiece bearing equipped with a damping part - Google Patents
Mechanical timepiece bearing equipped with a damping part Download PDFInfo
- Publication number
- EP3872577A1 EP3872577A1 EP20159595.6A EP20159595A EP3872577A1 EP 3872577 A1 EP3872577 A1 EP 3872577A1 EP 20159595 A EP20159595 A EP 20159595A EP 3872577 A1 EP3872577 A1 EP 3872577A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bearing
- cage
- damping
- alloy
- mechanical
- 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.)
- Pending
Links
- 238000013016 damping Methods 0.000 title claims abstract description 56
- 239000007769 metal material Substances 0.000 claims abstract description 21
- 238000005096 rolling process Methods 0.000 claims abstract description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 31
- 239000000956 alloy Substances 0.000 claims description 31
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 30
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 24
- 239000000463 material Substances 0.000 claims description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 15
- 229910052782 aluminium Inorganic materials 0.000 claims description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 15
- 229910052759 nickel Inorganic materials 0.000 claims description 15
- 238000004804 winding Methods 0.000 claims description 14
- 229910052742 iron Inorganic materials 0.000 claims description 12
- -1 preferably 82% Chemical compound 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 9
- HLXZNVUGXRDIFK-UHFFFAOYSA-N nickel titanium Chemical compound [Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ti].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni].[Ni] HLXZNVUGXRDIFK-UHFFFAOYSA-N 0.000 claims description 8
- 229910001000 nickel titanium Inorganic materials 0.000 claims description 8
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- 239000010941 cobalt Substances 0.000 claims description 5
- 229910017052 cobalt Inorganic materials 0.000 claims description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 239000011572 manganese Substances 0.000 claims description 3
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 description 6
- 230000003068 static effect Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 229910000952 Be alloy Inorganic materials 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000035807 sensation Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
Images
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
- G04B5/00—Automatic winding up
- G04B5/02—Automatic winding up by self-winding caused by the movement of the watch
- G04B5/18—Supports, suspensions or guide arrangements, for oscillating weights
- G04B5/19—Suspension of the oscillating weight at its centre of rotation
-
- 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
-
- 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
- G04B31/004—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor characterised by the material used
- G04B31/012—Metallic bearings
- G04B31/0123—Metallic bearings with metallic ball bearings and metallic roller bearings
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/01—Alloys based on copper with aluminium as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/05—Alloys based on copper with manganese as the next major constituent
Definitions
- the invention relates to a mechanical clockwork bearing provided with a damping part.
- the invention also relates to a timepiece movement comprising at least one such bearing.
- the invention relates to the field of clockwork mechanisms and more particularly to rotational guides.
- Self-winding mechanical watches are generally equipped with oscillating winding masses to wind the barrel spring.
- a ball bearing is most often used as the suspension.
- the components of a bearing are usually metallic, in particular steel, brass or a copper-beryllium alloy.
- the aim of the invention is to provide a mechanical bearing, in particular a ball bearing, which avoids the aforementioned problems.
- the invention relates to a mechanical clockwork bearing intended to be fitted on a mechanical movement of a timepiece, the bearing comprising, coaxial about a common axis of rotation, at least one internal cage and at least one outer cage forming a circulation track, as well as a plurality of moving bodies sliding or rolling in the circulation track, during a relative movement between said internal cage and said outer cage which guide them and one of which at the less of said inner cage and outer cage is a dynamic cage.
- the invention is remarkable in that at least part of the bearing is made of an elastic metallic material with high damping capability, the damping factor of which is greater than 10%, preferably greater than 30%.
- a metallic material makes it possible to avoid the problems of damping made of synthetic material, such as absorption of moisture or the release of gas.
- a metallic material is more qualitative and noble in a higher end timepiece, and it is generally much more resistant.
- the metallic material has a tensile strength greater than 100 MPa, preferably greater than 400 MPa, or even 600 MPa.
- the bearing comprises a first damping part intended to be positioned between one of said cages and a bridge of the automatic movement winding system, the first damping part forming the part. bearing made of an elastic metallic material with high damping capability.
- the bearing comprises a second damping part intended to be positioned between one of said cages and means for maintaining the bearing on the movement, such as a nut or a screw, the second damping part forming the part of the bearing made of an elastic metallic material with high damping capability.
- the first and / or the second part are washers.
- the first and / or the second part are tubes.
- the outer cage is made from the damping material.
- the internal cage is made from the damping material.
- said moving parts are balls made of a metallic material with high damping power.
- the invention also relates to a timepiece movement comprising at least one such bearing.
- the invention relates to a mechanical self-winding bearing 1 for a timepiece movement 10, for example as shown in FIGS. figures 1 and 2 .
- the movement 10 comprises an axis 2 for a needle display system, a bridge 3 of an automatic winding system on which various cogs and movement elements 10 are assembled, as well as a ball bearing 1 fixed on the bridge 3 of the automatic winding system by retaining means, such as a screw 7 for the figure 1 or a nut 9 for the figure 2 .
- This bearing 1 comprises, conventionally, coaxial around a common axis of rotation D, at least one internal cage 4, 14 and at least one external cage 5, 15.
- the axis 2 of the needle display system and the axis D are collinear, axis 2 of the display system being assembled on the other side of the bridge from the bearing1.
- these internal 4, 14 and external 5, 15 cages form a circulation track 20, in which a plurality of moving parts 12, 13, here balls, slide or roll during a relative movement between the internal cage 4, 14 and the outer cage 5, 15.
- the circulation track 20 is an internal duct of the bearing, which retains the wheels 12, 13 while allowing them to move in the duct.
- the invention is illustrated in the figures in the simplified case of a single internal cage 4, 14 and of a single external cage 5, 15, the person skilled in the art can extrapolate it to a bearing comprising several stages, each of which comprises a circulation track 20 of mobiles 12, 13 between an internal cage 4, 14 and an external cage 5, 15.
- the external cage 5, 15 is formed by a single external ring.
- the outer cage 5, 15 can also be made up of several juxtaposed outer rings.
- the bearing 1 is assembled on the bridge 3.
- the mechanical bearing 1 comprises an axial central passage 16 for the passage of the screw 7 or the nut 9.
- the screw 7 is screwed into a stud 8 retained by a flange 18 under the bridge 3 of the winding system, while the nut 9 is screwed around the stud 8.
- the screw 7 or the nut 9, as well as the stud 8 are arranged along the axis D of the bearing 1.
- the stud 8 inserted in the passage 16 under the ball bearing 1 , while the screw 7 or the nut 9 is inserted in the passage 16 from the top of the bearing 1.
- the internal cage 4, 14, or the external cage 5, 15 is a dynamic cage, that is to say it is mobile during the normal operation of the bearing with respect to a static component of a timepiece movement, such as plate, bridge 3, or the like.
- the internal cage 4, 14 is a dynamic cage and the external cage 5, 15 is a dynamic cage.
- the inner cage 4, 14 is a static cage, and the outer cage 5, 15 is a dynamic cage.
- the internal cage is a dynamic cage
- the external cage 5, 15 is a static cage.
- the smallest bearings have 0.2mm diameter balls, for a 1.6mm diameter, their thicknesses are between 0.4 and 1mm.
- Bearing 1 shown in figures 1 or 2 is a ball bearing according to the invention, with a diameter of 5.7 mm, a ball diameter of 0.5 mm, an inner cage thickness of 1.0 mm, and an outer cage thickness of 1.0 mm.
- the bearing 1 comprises a first damping part 6 positioned between the internal cage 4, 14 and the bridge 3 of the automatic winding system.
- the first part 6 is arranged on a plate 19 of the bridge of the automatic winding system.
- the bearing 1 further comprises a second damping part 17 positioned between the internal cage 4, 14 and the means of maintenance of the bearing 1 on the movement 10, that is to say the screw 7 or the nut 9.
- the second part 17 is arranged in a housing 21 hollowed out in the upper face of the internal cage 4, 14.
- the parts damping are washers, or flat discs, provided with a central opening allowing the passage of the screw, the nut or the stud according to its arrangement.
- the second part is smaller than the first because the screw or nut is narrower.
- the damping parts are concentric around the axis of the bearing.
- a damping part 6, 7 of the first embodiment which is in the form of a washer.
- a damping piece 22 in the form of a tube is also shown.
- the tubes are elongated hollow pieces and arranged in a manner similar to washers. Tubes can in fact be used to absorb vibrations according to another embodiment.
- the damping parts 6, 17, 22 are made of an elastic metallic material with high damping capability, the damping factor of which is greater than 10%, preferably greater than 30%. Such a damping factor provides sufficient comfort for the wearer of the timepiece. Thus, these damping parts absorb the vibrations generated by the ball bearing 1.
- ⁇ Ediss Emax ; where Ediss is the energy dissipated by the material during an oscillation cycle Emax , and Emax is the maximum strain energy stored by the material during an oscillation cycle.
- Nitinol has particular qualities of shape memory and super elasticity.
- the metallic material has a tensile strength greater than 100 MPa, preferably greater than 400 MPa, or even 600 MPa.
- the bearing part is more resistant, and wears less quickly than with other materials.
- Polymer damping materials as described in the application EP3418595 , have a much lower modulus of elasticity, so that play can occur between the ball bearing and the bridge. Such play can cause contact between the bearing and the bridge, or other components of the movement.
- the figure 4 shows a graph 30 in which examples of damping factor values as a function of the tensile strength of metallic materials are shown.
- the alloys mentioned above have both a high damping factor, greater than 10%, or even 30%, and a high tensile strength, greater than 100, or even 600 MPa.
- the embodiments shown relate to damping parts. However, it is possible to obtain damping with other parts of the bearing.
- At least part of the bearing is made of an elastic metallic material with high damping capability, the damping factor of which is greater than 10%, preferably greater than 30%.
- the part made of metallic material is one of the cages of the ball bearing.
- the two cages are formed from this metallic damping material.
- the geometry of the bearing must be adapted to avoid stresses and contact pressures.
- said moving parts are balls made of a metallic material with high damping power. Materials of nitinol type are particularly suitable for making such beads.
- the invention also relates to a timepiece movement 10 comprising at least one bearing 1 as described above.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Rolling Contact Bearings (AREA)
- Support Of The Bearing (AREA)
Abstract
L'invention se rapporte à un roulement mécanique (1) d'horlogerie destiné à être agencé sur un mouvement mécanique (10) de pièce d'horlogerie, le roulement (1) comportant, coaxiales autour d'un axe de rotation commun (D), au moins une cage interne (4) et au moins une cage externe (5) formant une piste de circulation (20), ainsi qu'une pluralité de mobiles (12) glissant ou roulant dans la piste de circulation (20), lors d'un mouvement relatif entre ladite cage interne (4) et ladite cage externe (5) qui les guident et dont l'une au moins desdites cage interne (4) et cage externe (5) est une cage dynamique, au moins une partie du roulement (1) étant réalisée dans un matériau métallique élastique à haut pourvoir d'amortissement, dont la facteur d'amortissement est supérieur à 10%, de préférence supérieur à 30%. The invention relates to a mechanical clockwork bearing (1) intended to be fitted on a mechanical movement (10) of a timepiece, the bearing (1) comprising, coaxial around a common axis of rotation (D ), at least one internal cage (4) and at least one external cage (5) forming a circulation track (20), as well as a plurality of mobiles (12) sliding or rolling in the circulation track (20), during a relative movement between said inner cage (4) and said outer cage (5) which guide them and of which at least one of said inner cage (4) and outer cage (5) is a dynamic cage, at least one part of the bearing (1) being made of an elastic metallic material with high damping capability, the damping factor of which is greater than 10%, preferably greater than 30%.
Description
L'invention concerne un roulement mécanique d'horlogerie muni d'une partie amortissante.The invention relates to a mechanical clockwork bearing provided with a damping part.
L'invention concerne encore un mouvement d'horlogerie comportant au moins un tel roulement.The invention also relates to a timepiece movement comprising at least one such bearing.
L'invention concerne le domaine des mécanismes d'horlogerie et plus particulièrement les guidages en rotation.The invention relates to the field of clockwork mechanisms and more particularly to rotational guides.
Les montres mécaniques à remontage automatique sont généralement dotées de masses de remontage oscillantes pour remonter le ressort-barillet. Afin de permettre le pivotement de la masse oscillante, on utilise le plus souvent un roulement à billes comme suspension.Self-winding mechanical watches are generally equipped with oscillating winding masses to wind the barrel spring. In order to allow the oscillating mass to pivot, a ball bearing is most often used as the suspension.
Les composants d'un roulement sont ordinairement métalliques, en particulier en acier, en laiton ou en alliage cuivre-béryllium.The components of a bearing are usually metallic, in particular steel, brass or a copper-beryllium alloy.
Cependant, de tels roulements à billes génèrent des bruits sous forme d'ondes acoustiques, qui peuvent être gênantes pour le porteur de la montre. L'origine de ces bruits est diverse, notamment à cause de la rugosité des contacts entre les corps, les défauts de formes à la fabrication ou dus à l'usure des corps par les frottements.However, such ball bearings generate noise in the form of acoustic waves, which can be annoying for the wearer of the watch. The origin of these noises is diverse, in particular because of the roughness of the contacts between the bodies, shape defects during manufacture or due to wear of the bodies by friction.
Afin de résoudre ce problème, on a cherché, par exemple dans la demande
Le but de l'invention est de proposer un roulement mécanique, notamment un roulement à billes, qui évite les problèmes précités.The aim of the invention is to provide a mechanical bearing, in particular a ball bearing, which avoids the aforementioned problems.
A cet effet, l'invention concerne un roulement mécanique d'horlogerie destiné à être agencé sur un mouvement mécanique d'une pièce d'horlogerie, le roulement comportant, coaxiales autour d'un axe de rotation commun, au moins une cage interne et au moins une cage externe formant une piste de circulation, ainsi qu'une pluralité de mobiles glissant ou roulant dans la piste de circulation, lors d'un mouvement relatif entre ladite cage interne et ladite cage externe qui les guident et dont l'une au moins desdites cage interne et cage externe est une cage dynamique.To this end, the invention relates to a mechanical clockwork bearing intended to be fitted on a mechanical movement of a timepiece, the bearing comprising, coaxial about a common axis of rotation, at least one internal cage and at least one outer cage forming a circulation track, as well as a plurality of moving bodies sliding or rolling in the circulation track, during a relative movement between said internal cage and said outer cage which guide them and one of which at the less of said inner cage and outer cage is a dynamic cage.
L'invention est remarquable en ce qu'au moins une partie du roulement est réalisée dans un matériau métallique élastique à haut pourvoir d'amortissement, dont le facteur d'amortissement est supérieur à 10%, de préférence supérieur à 30%.The invention is remarkable in that at least part of the bearing is made of an elastic metallic material with high damping capability, the damping factor of which is greater than 10%, preferably greater than 30%.
Grâce à un tel roulement, les vibrations dues au mouvement de la masse oscillante sont significativement atténuées. Ainsi, le port d'une montre à remontage automatique n'engendre pas de sensation désagréable, notamment au poignet.Thanks to such a bearing, the vibrations due to the movement of the oscillating weight are significantly attenuated. Thus, wearing a self-winding watch does not cause an unpleasant sensation, especially on the wrist.
En outre, l'utilisation d'un matériau métallique permet d'éviter les problèmes des amortissements en matériau synthétiques, tels que l'absorption d'humidité ou la libération de gaz. De plus, un matériau métallique est plus qualitatif et plus noble dans une pièce d'horlogerie de gamme supérieure, et il est généralement beaucoup plus résistant.In addition, the use of a metallic material makes it possible to avoid the problems of damping made of synthetic material, such as absorption of moisture or the release of gas. In addition, a metallic material is more qualitative and noble in a higher end timepiece, and it is generally much more resistant.
Selon un mode de réalisation particulier de l'invention, le matériau métallique a une résistance à la traction supérieure à 100 MPa, de préférence supérieure à 400 MPa, voire à 600 MPa.According to a particular embodiment of the invention, the metallic material has a tensile strength greater than 100 MPa, preferably greater than 400 MPa, or even 600 MPa.
Selon un mode de réalisation particulier de l'invention, le matériau est à choisir dans la liste suivante :
- un alliage de manganèse à au moins 80%, et de cuivre,
- un alliage de cuivre à au moins 80%, de préférence à 82%, d'aluminium et de nickel, de préférence à 12% et 5%,
- un alliage de fer à au moins 80%, de préférence à 85%, de chrome et d'aluminium, de préférence à 12% et 3%,
- un alliage de fer à au moins 60%, de préférence à 65%, et de cobalt, de préférence à 35%,
- un alliage de fer à au moins 90%, de préférence à 95%, d'aluminium et de carbone, de préférence à 6% et 0.2%,
- un alliage de manganèse à au moins 70%, de préférence à 73%,de cuivre, de nickel et de fer, de préférence à 20%, 5% et 2%, l'alliage ayant un indice de dureté de Vickers d'au moins 130, et
- un alliage de type nitinol comprenant du nickel à au moins 50%, de préférence à 55% et du titane, de préférence à 45%.
- an alloy of at least 80% manganese and copper,
- an alloy of at least 80% copper, preferably 82%, aluminum and nickel, preferably 12% and 5%,
- an alloy of at least 80% iron, preferably 85%, chromium and aluminum, preferably 12% and 3%,
- an alloy of at least 60% iron, preferably 65%, and cobalt, preferably 35%,
- an alloy of at least 90% iron, preferably 95%, aluminum and carbon, preferably 6% and 0.2%,
- an alloy of at least 70% manganese, preferably 73%, copper, nickel and iron, preferably 20%, 5% and 2%, the alloy having a Vickers hardness index of minus 130, and
- a nitinol type alloy comprising at least 50% nickel, preferably 55% and titanium, preferably 45%.
Selon un mode de réalisation particulier de l'invention, le roulement comprend une première pièce d'amortissement destinée à être positionnée entre l'une desdites cages et un pont du système de remontage automatique du mouvement, la première pièce d'amortissement formant la partie du roulement réalisée dans un matériau métallique élastique à haut pourvoir d'amortissement.According to a particular embodiment of the invention, the bearing comprises a first damping part intended to be positioned between one of said cages and a bridge of the automatic movement winding system, the first damping part forming the part. bearing made of an elastic metallic material with high damping capability.
Selon un mode de réalisation particulier de l'invention, le roulement comprend une deuxième pièce d'amortissement destinée à être positionnée entre l'une desdites cages et des moyens de maintien du roulement sur le mouvement, tel un écrou ou une vis, la deuxième pièce d'amortissement formant la partie du roulement réalisée dans un matériau métallique élastique à haut pourvoir d'amortissement.According to a particular embodiment of the invention, the bearing comprises a second damping part intended to be positioned between one of said cages and means for maintaining the bearing on the movement, such as a nut or a screw, the second damping part forming the part of the bearing made of an elastic metallic material with high damping capability.
Selon un mode de réalisation particulier de l'invention, la première et/ou la deuxième pièce sont des rondelles.According to a particular embodiment of the invention, the first and / or the second part are washers.
Selon un mode de réalisation particulier de l'invention, la première et/ou la deuxième pièce sont des tubes.According to a particular embodiment of the invention, the first and / or the second part are tubes.
Selon un mode de réalisation particulier de l'invention, la cage externe est réalisée dans le matériau d'amortissement.According to a particular embodiment of the invention, the outer cage is made from the damping material.
Selon un mode de réalisation particulier de l'invention, la cage interne est réalisée dans le matériau d'amortissement.According to a particular embodiment of the invention, the internal cage is made from the damping material.
Selon un mode de réalisation particulier de l'invention, lesdits mobiles sont des billes réalisées dans un matériau métallique à fort pouvoir d'amortissement.According to a particular embodiment of the invention, said moving parts are balls made of a metallic material with high damping power.
L'invention concerne encore un mouvement d'horlogerie comportant au moins un tel roulement.The invention also relates to a timepiece movement comprising at least one such bearing.
D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui va suivre, en référence aux dessins annexés, où :
- la
figure 1 représente de façon schématisée, une vue en coupe d'une partie d'un mouvement mécanique à remontage automatique, le mouvement étant muni d'un roulement à billes selon un premier mode de réalisation de l'invention ; - la
figure 2 représente de façon schématisée, une vue en coupe d'une partie d'un mouvement mécanique à remontage automatique, le mouvement étant muni d'un roulement à billes selon une variante du premier mode de réalisation de l'invention,
- la
figure 3 représente de façon schématisée une pièce d'amortissement en forme de rondelle et une pièce d'amortissement en forme de tube, - la
figure 4 est un graphique représentant le facteur d'amortissement de certains matériaux et alliages en fonction de la résistance à la traction des matériaux, ce graphique ayant été publié dans l'article« Development and application of high damping alloys for noise and vibration control » (ICSV 14, 9-12 july, 2007, Cairns AU) par F.Yin
- the
figure 1 schematically shows a sectional view of part of a mechanical movement with automatic winding, the movement being provided with a ball bearing according to a first embodiment of the invention; - the
figure 2 schematically shows a sectional view of part of a mechanical winding movement automatic, the movement being provided with a ball bearing according to a variant of the first embodiment of the invention,
- the
figure 3 schematically shows a washer-shaped damping part and a tube-shaped damping part, - the
figure 4 is a graph representing the damping factor of some materials and alloys as a function of the tensile strength of the materials, this graph having been published in the article“Development and application of high damping alloys for noise and vibration control” (ICSV 14, 9-12 july, 2007, Cairns AU) by F. Yin
L'invention concerne un roulement mécanique 1 de remontage automatique pour un mouvement d'horlogerie 10, par exemple tel que représenté sur les
Sur les
Ce roulement 1 comporte, classiquement, coaxiales autour d'un axe de rotation commun D, au moins une cage interne 4, 14 et au moins une cage externe 5, 15. L'axe 2 du système d'affichage à aiguilles et l'axe D sont colinéaires, l'axe 2 du système d'affichage étant assemblé de l'autre côté du pont par rapport au roulement1.This bearing 1 comprises, conventionally, coaxial around a common axis of rotation D, at least one
Assemblées, ces cages internes 4, 14 et externes 5, 15 forment une piste de circulation 20, dans laquelle une pluralité de mobiles 12, 13, ici des billes, glissent ou roulent lors d'un mouvement relatif entre la cage interne 4, 14 et la cage externe 5, 15. La piste de circulation 20 est un conduit interne du roulement, qui retient les mobiles 12, 13 tout en leur permettant de se déplacer dans le conduit.Assembled, these internal 4, 14 and external 5, 15 cages form a
L'invention est illustrée sur les figures dans le cas simplifié d'une cage interne 4, 14 unique et d'une cage externe 5, 15 unique, l'homme du métier peut l'extrapoler à un roulement comportant plusieurs étages, dont chacun comporte une piste de circulation 20 de mobiles 12, 13 entre une cage interne 4, 14 et une cage externe 5, 15. La cage externe 5, 15 est constituée par une bague externe unique. Bien sûr la cage externe 5, 15 peut aussi être composée de plusieurs bagues externes juxtaposées.The invention is illustrated in the figures in the simplified case of a single
Le roulement 1 est assemblé sur le pont 3. Sur les
Au niveau d'un tel étage comportant une piste de circulation 20, au moins la cage interne 4, 14, ou la cage externe 5, 15, est une cage dynamique, c'est-à-dire qu'elle est mobile pendant le fonctionnement normal du roulement par rapport à un composant statique d'un mouvement d'horlogerie, tel que platine, pont 3, ou similaire. Dans une variante particulière non illustrée, la cage interne 4, 14 est une cage dynamique et la cage externe 5, 15 est une cage dynamique. Dans une autre variante illustrée par la
De tels roulements 1 sont conçus pour des applications horlogères, et ont de ce fait des dimensions très réduites :
- diamètre compris entre 1.6 mm et 20.2 mm, bornes comprises ;
- diamètre des billes quand les mobiles sont des billes, compris entre 0.2 mm et 0.6 mm, bornes comprises ;
- épaisseur de la
4, 14 selon la direction de l'axe de rotation comprise entre 0.4 mm et 1.5 mm, bornes comprises, et inférieure ou égale à 1.0 mm quand les mobiles sont des billes de diamètre compris entre 0.2 m et 0.6 mm, bornes comprises ;cage interne - épaisseur de la
5, 15 selon la direction de l'axe de rotation comprise entre 0.4 mm et 1.5 mm, bornes comprises, et inférieure ou égale à 1.0 mm quand les mobiles sont des billes de diamètre compris entre 0.2 m et 0.6 mm, bornes comprises.cage externe
- diameter between 1.6 mm and 20.2 mm, terminals included;
- diameter of the balls when the mobiles are balls, between 0.2 mm and 0.6 mm, terminals included;
- thickness of the
4, 14 according to the direction of the axis of rotation between 0.4 mm and 1.5 mm, including terminals, and less than or equal to 1.0 mm when the moving parts are balls with a diameter of between 0.2 m and 0.6 mm including terminals;internal cage - thickness of the
5, 15 according to the direction of the axis of rotation between 0.4 mm and 1.5 mm, including terminals, and less than or equal to 1.0 mm when the moving parts are balls with a diameter of between 0.2 m and 0.6 mm , terminals included.outer cage
Plus particulièrement, les plus petits roulements possèdent des billes de diamètre 0.2mm, pour un diamètre de 1.6mm, leurs épaisseurs sont comprises entre 0.4 et 1mm.More specifically, the smallest bearings have 0.2mm diameter balls, for a 1.6mm diameter, their thicknesses are between 0.4 and 1mm.
Et les plus grands roulements possèdent des billes avec un diamètre jusqu'à 0.6mm, pour un diamètre de 5.7 à 20.2mm, leurs épaisseurs vont jusqu'à 1.5mm.And the largest bearings have balls with a diameter up to 0.6mm, for a diameter of 5.7 to 20.2mm, their thicknesses go up to 1.5mm.
Le roulement 1 illustré aux
Dans le premier mode de réalisation des
Sur la
Les pièces d'amortissement 6, 17, 22 sont réalisées dans un matériau métallique élastique à haut pourvoir d'amortissement, dont la facteur d'amortissement est supérieur à 10%, de préférence supérieur à 30%. Un tel facteur d'amortissement apporte un confort suffisant pour le porteur de la pièce d'horlogerie. Ainsi, ces pièces d'amortissement absorbent les vibrations engendrées par le roulement 1 à billes.The damping
En analyse mécanique dynamique, un corps est soumis à une contrainte ou à une déformation oscillatoire. Le facteur d'amortissement δ, aussi appelé facteur de perte, caractérise la capacité d'amortissement d'un matériau selon l'équation suivante :
Le matériau métallique est de préférence à choisir dans la liste suivante :
- un alliage de manganèse à au moins 80%, et de cuivre,
- un alliage de cuivre à au moins 80%, de préférence à 82%, d'aluminium et de nickel, de préférence à 12% et 5%,
- un alliage de fer à au moins 80%, de préférence à 85%, de chrome et d'aluminium, de préférence à 12% et 3%, tel que l'alliage commercial « Silentalloy »,
- un alliage de fer à au moins 60%, de préférence à 65%, et de cobalt, de préférence à 35%, tel que l'alliage commercial « Gentalloy »,
- un alliage de fer à au moins 90%, de préférence à 95%, d'aluminium et de carbone, de préférence à 6% et 0.2%,
- un alliage de manganèse à au moins 70%, de préférence à 73%,de cuivre, de nickel et de fer, de préférence à 20%, 5% et 2%, tel que l'alliage commercial « M2052 », l'alliage ayant un indice de dureté de Vickers d'au moins 130, et
- un alliage de type nitinol comprenant du nickel à au moins 50%, de préférence à 55% et du titane, de préférence à 45%.
- an alloy of at least 80% manganese and copper,
- an alloy of at least 80% copper, preferably 82%, aluminum and nickel, preferably 12% and 5%,
- an alloy of at least 80% iron, preferably 85%, chromium and aluminum, preferably 12% and 3%, such as the commercial alloy "Silentalloy",
- an alloy of at least 60% iron, preferably 65%, and cobalt, preferably 35%, such as the commercial alloy "Gentalloy",
- an alloy of at least 90% iron, preferably 95%, aluminum and carbon, preferably 6% and 0.2%,
- an alloy of at least 70% manganese, preferably 73%, copper, nickel and iron, preferably 20%, 5% and 2%, such as the commercial alloy "M2052", the alloy having a Vickers hardness index of at least 130, and
- a nitinol type alloy comprising at least 50% nickel, preferably 55% and titanium, preferably 45%.
Cependant, d'autres matériaux métalliques sont également possibles, notamment des alliages ayant les mêmes propriétés physiques, notamment concernant le facteur d'amortissement.However, other metallic materials are also possible, in particular alloys having the same physical properties, in particular concerning the damping factor.
Les matériaux de type M2052 ou de type nitinol conviennent particulièrement bien pour les pièces d'amortissement, tels que les rondelles ou tubes décrits ci-dessus. Le nitinol a notamment des qualités de mémoire de forme et de super élasticité.Materials of type M2052 or of nitinol type are particularly suitable for damping parts, such as the washers or tubes described above. Nitinol has particular qualities of shape memory and super elasticity.
En outre, le matériau métallique a une résistance à la traction supérieure à 100 MPa, de préférence supérieure à 400 MPa, voire à 600 MPa. Ainsi, la partie du roulement est plus résistante, et s'use moins vite qu'avec d'autres matériaux. Les matériaux d'amortissement en polymère, tels que décrit dans la demande
La
Les modes de réalisation représentés portent sur des pièces d'amortissement. Cependant il est possible d'obtenir un amortissement avec d'autres pièces du roulement.The embodiments shown relate to damping parts. However, it is possible to obtain damping with other parts of the bearing.
Plus généralement, selon l'invention, au moins une partie du roulement est réalisée dans un matériau métallique élastique à haut pourvoir d'amortissement, dont la facteur d'amortissement est supérieur à 10%, de préférence supérieur à 30%.More generally, according to the invention, at least part of the bearing is made of an elastic metallic material with high damping capability, the damping factor of which is greater than 10%, preferably greater than 30%.
Dans un second mode de réalisation, non représenté sur les figures, la partie en matériau métallique est l'une des cages du roulement à billes. Dans une variante, les deux cages sont formées de ce matériau d'amortissement métallique. La géométrie du roulement doit être adaptée pour éviter les contraintes et les pressions de contact.In a second embodiment, not shown in the figures, the part made of metallic material is one of the cages of the ball bearing. In a variant, the two cages are formed from this metallic damping material. The geometry of the bearing must be adapted to avoid stresses and contact pressures.
Dans un troisième mode de réalisation, non représenté sur les figures, lesdits mobiles sont des billes réalisées dans un matériau métallique à fort pouvoir d'amortissement. Les matériaux de type nitinol conviennent particulièrement bien pour réaliser de telles billes.In a third embodiment, not shown in the figures, said moving parts are balls made of a metallic material with high damping power. Materials of nitinol type are particularly suitable for making such beads.
L'invention concerne encore un mouvement d'horlogerie 10 comportant au moins un roulement 1 tel que décrit précédemment.The invention also relates to a
Claims (11)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20159595.6A EP3872577A1 (en) | 2020-02-26 | 2020-02-26 | Mechanical timepiece bearing equipped with a damping part |
US17/162,404 US11934153B2 (en) | 2020-02-26 | 2021-01-29 | Mechanical horological bearing provided with a damping |
JP2021021484A JP7254108B2 (en) | 2020-02-26 | 2021-02-15 | Mechanical watch bearing with damping part |
KR1020210025947A KR102635007B1 (en) | 2020-02-26 | 2021-02-25 | Mechanical horological bearing provided with a damping part |
CN202110216116.9A CN113311685A (en) | 2020-02-26 | 2021-02-26 | Mechanical timepiece bearing provided with a damping member |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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EP20159595.6A EP3872577A1 (en) | 2020-02-26 | 2020-02-26 | Mechanical timepiece bearing equipped with a damping part |
Publications (1)
Publication Number | Publication Date |
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EP3872577A1 true EP3872577A1 (en) | 2021-09-01 |
Family
ID=69740269
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP20159595.6A Pending EP3872577A1 (en) | 2020-02-26 | 2020-02-26 | Mechanical timepiece bearing equipped with a damping part |
Country Status (5)
Country | Link |
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US (1) | US11934153B2 (en) |
EP (1) | EP3872577A1 (en) |
JP (1) | JP7254108B2 (en) |
KR (1) | KR102635007B1 (en) |
CN (1) | CN113311685A (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH244128A (en) * | 1944-11-15 | 1946-08-31 | Sa Benjamin Pellaton | Ball bearing. |
JP2007309480A (en) * | 2006-05-22 | 2007-11-29 | Jtekt Corp | Rolling bearing device |
EP3418595A1 (en) | 2017-06-19 | 2018-12-26 | MPS Micro Precision Systems AG | Ball bearing for horology |
EP3460275A1 (en) | 2017-09-25 | 2019-03-27 | Rolex Sa | Timepiece bearing |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH271422A (en) * | 1948-02-05 | 1950-10-31 | Roulements A Billes Miniatures | Device for pivoting on balls of an oscillating weight for the automatic winding of a timepiece. |
CH330889A (en) * | 1956-06-11 | 1958-06-30 | L Glocker Paul | Roskopf watch |
JP3832270B2 (en) | 2001-04-13 | 2006-10-11 | セイコーエプソン株式会社 | Clock with eccentric weight |
DE102005007986A1 (en) | 2005-02-22 | 2006-08-31 | Schaeffler Kg | Roller bearing in particular for use in vehicle, comprising noise absorbing metal ring with threaded outer surface |
JP2012198041A (en) * | 2011-03-18 | 2012-10-18 | Seiko Instruments Inc | Slip structure for watch wheel and watch using the same |
CN104133362B (en) * | 2013-05-01 | 2021-05-18 | 劳力士有限公司 | Damping body for a pendulum of a timepiece oscillator |
JP7290928B2 (en) | 2017-09-25 | 2023-06-14 | ロレックス・ソシエテ・アノニム | watch bearing |
EP3712712B1 (en) * | 2019-03-18 | 2021-10-20 | Montres Jaquet Droz SA | Dial for a timepiece provided with a three-dimensional decoration |
-
2020
- 2020-02-26 EP EP20159595.6A patent/EP3872577A1/en active Pending
-
2021
- 2021-01-29 US US17/162,404 patent/US11934153B2/en active Active
- 2021-02-15 JP JP2021021484A patent/JP7254108B2/en active Active
- 2021-02-25 KR KR1020210025947A patent/KR102635007B1/en active IP Right Grant
- 2021-02-26 CN CN202110216116.9A patent/CN113311685A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH244128A (en) * | 1944-11-15 | 1946-08-31 | Sa Benjamin Pellaton | Ball bearing. |
JP2007309480A (en) * | 2006-05-22 | 2007-11-29 | Jtekt Corp | Rolling bearing device |
EP3418595A1 (en) | 2017-06-19 | 2018-12-26 | MPS Micro Precision Systems AG | Ball bearing for horology |
EP3460275A1 (en) | 2017-09-25 | 2019-03-27 | Rolex Sa | Timepiece bearing |
Non-Patent Citations (1)
Title |
---|
F.YIN: "Development and application of high damping alloys for noise and vibration control", ICSV 14, 9 July 2007 (2007-07-09) |
Also Published As
Publication number | Publication date |
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KR20210109468A (en) | 2021-09-06 |
US11934153B2 (en) | 2024-03-19 |
KR102635007B1 (en) | 2024-02-07 |
JP2021135293A (en) | 2021-09-13 |
JP7254108B2 (en) | 2023-04-07 |
CN113311685A (en) | 2021-08-27 |
US20210263473A1 (en) | 2021-08-26 |
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