EP2053473A2 - Federhaus für Uhrwerk - Google Patents

Federhaus für Uhrwerk Download PDF

Info

Publication number
EP2053473A2
EP2053473A2 EP20080011150 EP08011150A EP2053473A2 EP 2053473 A2 EP2053473 A2 EP 2053473A2 EP 20080011150 EP20080011150 EP 20080011150 EP 08011150 A EP08011150 A EP 08011150A EP 2053473 A2 EP2053473 A2 EP 2053473A2
Authority
EP
European Patent Office
Prior art keywords
barrel
drum
shaft
fixed
barrel shaft
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Withdrawn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
EP20080011150
Other languages
English (en)
French (fr)
Inventor
Laurent Besse
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.)
LES ARTISANS HORLOGERS SARL
Artisans Horlogers SARL
Original Assignee
LES ARTISANS HORLOGERS SARL
Artisans Horlogers SARL
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 LES ARTISANS HORLOGERS SARL, Artisans Horlogers SARL filed Critical LES ARTISANS HORLOGERS SARL
Publication of EP2053473A2 publication Critical patent/EP2053473A2/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Withdrawn legal-status Critical Current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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/16—Barrels; Arbors; Barrel axles

Definitions

  • the present invention relates to barrels for clockwork comprising a barrel shaft on which is rotatably mounted a barrel drum, a motor spring being housed in the drum and fixed by its inner end to the barrel shaft and by its outer end to the inner wall of said drum.
  • the invention relates to such a barrel or the drum is rotatably mounted on the barrel shaft by means of ball bearings.
  • Such barrels are known CH 390 801 , FR 403 943 and JP 11174162 . All these known barrels comprise a closed drum or provided with a lid pivoted on the barrel shaft by means of two separate ball bearings.
  • the subject of the present invention is a cylinder for a watch or watch movement comprising a drum pivotally mounted using a ball bearing on a barrel shaft and a spring fixed by its inner end to the barrel shaft and by its outer end to the inner peripheral wall of said drum tending to obviate the aforementioned drawbacks, easy to assemble and reducing as much as possible the number of parts constituting it to reduce the cost price, the cost and the assembly time and its bulk , especially in thickness.
  • the barrel for a piece or clockwork comprises a barrel shaft, a barrel drum enclosing a motor spring whose inner end is fixed to the barrel shaft, while the outer end is fixed to the barrel shaft.
  • barrel drum and is distinguished by the fact that the barrel drum is rotatably mounted on the barrel shaft by a single ball bearing located between the barrel shaft and the bottom of the barrel drum.
  • the invention also relates to a timepiece cylinder having a barrel axis and a barrel drum, which is distinguished by the fact that the inner wafer of the bottom of the drum comprises a first and a second outer rolling faces; in that a first inner rolling face is machined in the barrel shaft; in that a second inner rolling face is carried by a ring fixed on a shoulder of the barrel shaft 1; and in that a bead train is located between the two inner rolling faces and the two outer rolling faces.
  • the invention also relates to a timepiece provided with a barrel as defined in the two preceding paragraphs.
  • the invention also relates to particular embodiments of a barrel having the features listed in claims 2 to 6 and 8 to 10.
  • the attached drawing illustrates schematically and by way of example an embodiment of the barrel for a watch or watch movement according to the invention.
  • the figure 1 is a perspective view from above of the barrel according to the invention.
  • the figure 2 is an axial section on a larger scale of the cylinder illustrated in figure 1 .
  • the barrel for movement or timepiece comprises a barrel shaft 1 having a central portion 1.1 of larger diameter, the side wall 1.2 comprises conventional means, pad, pin, rivet, hook, etc. adapted to attach the inner end of a barrel spring (not shown).
  • this shaft has a first annular inner bearing surface 1.3. forming an angle of 45 ° with the longitudinal axis of the barrel shaft 1.
  • This first inner rolling face 1.3 is machined in or on the barrel axis 1.
  • This barrel further comprises a drum 2 comprising a bottom 2.1 extending perpendicularly to the barrel shaft 1 and a circular side wall 2.2 concentric with the barrel shaft 1.
  • This side wall 2.2 of the drum 2 has a set of teeth 2.3 intended for mesh with the clockwork motor of the watch movement.
  • the outer end of the barrel spring (not shown) is fixed to the inner face of the drum side wall 2.2 in any conventional manner using a shoe, a rivet, a pin, a a hook etc.
  • the bottom 2.1 of the drum 2 has a central bore 2.4 whose diameter is greater than the largest diameter D1 of the rolling face 1.3 of the barrel shaft 1 but less than the diameter D2 of the outer face 1.2 of the central portion 1.1 of this barrel axis 1.
  • first and second bearing surfaces 2.5, 2.6 In this central bore 2.4 of the bottom 2.1 of the drum 2, are machined first and second bearing surfaces 2.5, 2.6 annular of an outer race. These bearing surfaces 2.5, 2.6 form an angle of 90 ° between them and each of them of 45 ° with the axis of the barrel shaft 1 or the drum 2. These two outer bearing faces 2.5 and 2.6 constitute a first outer race for a series of balls 3 also in contact with the rolling face 1.3 of the barrel shaft 1.
  • a ring 4 is driven on a bearing surface 1.4 of the barrel shaft 1 and abuts on a shoulder 1.5 of this barrel shaft 1 in a service position for which a second internal rolling face 4.1 carried by this ring 4 forms with the first internal bearing surface 1.3 of the barrel shaft 1 an internal raceway for the balls 3; the external raceway for these balls 3 being formed by the two rolling surfaces 2.5, 2.6 of the bottom 2.1 of the drum 2.
  • the second inner rolling face 4.1 of the ring 4 forms a 90 ° angle with the first internal rolling face 1.3 of the barrel axis 1, these two rolling faces 1.3 and 4.1 both form an angle of 45 ° with the axis of the barrel shaft 1 and the axis of the barrel drum 2, the two internal running faces 1.3, 4.1 being located in the assembled position of the barrel opposite the two outer bearing faces 2.5, 2.6.
  • the ring 4 could be threaded internally and screwed onto a thread that would comprise the portion 1.4 of the barrel shaft 1.
  • this method of pivoting the drum 2 on the barrel shaft 1 is very simple, has only one ball bearing without cages, the balls 3 rolling directly on the outer race formed by the faces rolling bearing 2.5, 2.6 of the drum and on the inner race formed by the rolling face 1.3 of the barrel shaft 1 and the rolling face 4.1 of the ring 4.
  • the barrel variant illustrated also comprises a lid 5 fixed to the peripheral wall 2.2 of the drum 2 and having a central hole 5.1 allowing the barrel shaft 1 to pass.
  • the edge of this central hole 5.1 bears against the edge of the central portion 1.1 of this shaft 1 located on the opposite side to the ball bearing 3, 2.5, 2.6, 1.3, 4.1.
  • This lid 5 is optional, the barrel operating perfectly without it.
  • the number of parts of this assembly is reduced to the maximum, which facilitates the mounting of the drum 2 on the barrel shaft 1. This low number of parts also reduces the costs of such an embodiment.
  • the presence of a single ball bearing guarantees perfect centering and mounting of the drum 2 on the barrel shaft 1 and decreases the frictional forces, which increases the efficiency of the barrel.
  • the drum 2 is thus mounted on the barrel shaft 1 by a train of balls 3 rolling on a raceway outer face formed by two bearing faces 2.5, 2.6 machined in the wall of the central bore 2.4 of the bottom 2.1 of the barrel drum 2 and on an internal raceway formed of two bearing faces, the first 1.4 being machined in the shaft of barrel 1 and the second 4.1 being machined on a ring 4 fixed on said barrel shaft 1.
EP20080011150 2007-10-22 2008-06-19 Federhaus für Uhrwerk Withdrawn EP2053473A2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH16472007 2007-10-22

Publications (1)

Publication Number Publication Date
EP2053473A2 true EP2053473A2 (de) 2009-04-29

Family

ID=39584191

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20080011150 Withdrawn EP2053473A2 (de) 2007-10-22 2008-06-19 Federhaus für Uhrwerk

Country Status (1)

Country Link
EP (1) EP2053473A2 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR403943A (fr) 1909-06-11 1909-11-18 Karl Schwan Mouvement d'horlogerie à longue marche avec échappement à ancre
CH390801A (de) 1962-02-23 1964-12-31 A & M Fell Ltd Uhr mit einem Antrieb für einen weiteren Mechanismus
JPH11174162A (ja) 1997-12-11 1999-07-02 Seiko Instruments Inc 香箱車及び機械式時計

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR403943A (fr) 1909-06-11 1909-11-18 Karl Schwan Mouvement d'horlogerie à longue marche avec échappement à ancre
CH390801A (de) 1962-02-23 1964-12-31 A & M Fell Ltd Uhr mit einem Antrieb für einen weiteren Mechanismus
JPH11174162A (ja) 1997-12-11 1999-07-02 Seiko Instruments Inc 香箱車及び機械式時計

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