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
  • G04B31/004—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor characterised by the material used
  • G04B31/008—Jewel bearings
  • G04B31/0087—Jewel bearings with jewel hole only
• • 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
  • G04B1/12—Driving mechanisms with mainspring with several mainsprings
• • 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
  • G04B27/00—Mechanical devices for setting the time indicating means
  • G04B27/02—Mechanical devices for setting the time indicating means by making use of the winding means
  • G04B27/04—Mechanical devices for setting the time indicating means by making use of the winding means with clutch wheel

Definitions

• the present invention relates to a watch movement comprising two rotating components around a common axis.
• each piece used comprises a shaft provided at both ends of pivots, each engaged in a bearing.
• the pivot members formed of a bearing and a pivot are traditionally used to ensure axial and radial positioning of the rotating parts present in the movements.
• FR1033071 proposes a stone having a circular section hole and a steel pivot, having at its surface facing the stone, a polygonal section, so as to reduce the contact surfaces between the pivot and the stone.
• WO20091 15519 discloses a pivot member for rotating a workpiece of a watch movement about an axis of rotation, comprising a pivot and a bearing receiving said pivot.
• the contact surfaces of the two elements against each other are made of a material having a low coefficient of friction and a low wear rate.
• the object of the present invention is to propose another arrangement for coupling two watch components in a coaxial manner by means of easily manufactured and easily machinable pivoting members.
• the present invention also makes it possible to avoid hardening of the material caused by contact between a pivot and a bearing.
• a watch movement comprises two rotary watch components around a common axis, namely a first watch component fixed to a shaft comprising at at least one of its ends a pivot and a second watch component comprising a receiving bearing said pivot.
• the pivot and the bearing have the shape of a regular rounded polygon of three to six sides, preferably a rounded equilateral triangle, male or female respectively, arranged so that the pivot engages the bearing with angular clearance for transmitting a rotation of the shaft to the second component by a self-locking effect.
• the rounded triangular shape of the pivot and the bearing respectively has a diameter D1, D1 'of a virtual registered circle tangent to the three sides of the triangle and respectively a diameter D2, D2' of a virtual circumscribed circle. passing through the three vertices, where the ratio D1 / D2 or D1 7D2 'is between 0.5 and 0.95.
• the rounded triangular shape of the bearing has a diameter D2 'of a virtual circumscribed circle passing through the three vertices of the triangle of the bearing and the rounded triangular shape of the pivot has a diameter D2 of a circumscribed circle. virtual passing through the three vertices of the triangle of the pivot, where the ratio D27D2 is between 0.7 and 0.99.
• a contact surface S made between the pivot and the bearing when the pivot is inserted into the bearing and moved angularly to ensure a self-locking effect, extends over a length of between 1 / 10 and 9/10 of the total length of one side of the rounded polygon of the pivot.
• the difference in diameter between D2 and D2 'and the shape of the bearing and the pivot allow that the insertion of the pivot in the bearing is self-centering, allowing by an angular displacement a self-locking effect, the extraction of the pivot of the bearing angular displacement opposite the angular displacement for self-locking.
• FIG. 1 shows a perspective view of a bearing and a pivot, rounded equilateral triangular shape
• FIG. 2 shows a bottom view of a pivot inserted in a bearing, the pivot and the bearing being rounded triangular equilateral shape
• FIG. 3 shows a bottom view of the pivot and the bearing of Figure 2, the pivot having been moved angularly in a clockwise direction;
• - Figure 4 shows a bottom view of a pivot or a triangular equilateral triangular bearing rounded;
• FIG. 5 shows a perspective view of a coaxial coupling of two barrels, a pivot and a triangular equilateral triangular bearing ensuring the connection between the two barrels;
• FIG. 6 shows a sectional view of two barrels coaxially coupled.
• a coaxial coupling of two rotary clock components around a common axis is made from a first clock component (partially illustrated) attached to a shaft 30 having at one of its ends a pivot 1 and a second clock component 20 (partially illustrated) having a bearing 2 receiving said pivot 1.
• the pivot 1 and the bearing 2 have the shape of a rounded equilateral triangle male or female respectively and are arranged so that the pivot 1 engages in the bearing 2 with an angular play to transmit a rotation of the shaft 30 to the second component 20 by a self-locking effect.
• the pivot 1 comprises a bearing surface 3 rubbing against a face 4 of the watch component 20.
• the pivot 1 is inserted into the bearing 2, the pivot 1 and the bearing 2 being of rounded triangular shape.
• the rounded triangular shape of the bearing 2 has a diameter D2 of a virtual circumscribed circle 6 passing through the three vertices of the triangle of the bearing 2 and the rounded triangular shape of the pivot 1 has a diameter D2 'of a virtual circumscribed circle 10 passing through the three vertices of the triangle of the pivot (1).
• the difference between the diameters D2 'and D2 is small and the ratio D27D2 is 0.93.
• the pivot 1 of rounded triangular male form fits into the rounded triangular female shape of the bearing 2 and after angular displacement the pivot 1 and the bearing 2 are connected in rotation about the same axis .
• the insertion of the pivot 1 in the bearing 2 is self-centering, allowing by this angular displacement a self-locking effect.
• the extraction of the pivot 1 of the bearing 2 is by angular displacement opposite to the angular displacement for the self-locking.
• the rounded triangular shape of the pivot 1 and the bearing 2 has a diameter D 1 of a virtual inscribed circle 6 tangential to the three sides of the triangle and a diameter D 2 of a virtual circumscribed circle 5 passing through the three highs.
• the ratio D1 / D2 is, in this example, about 0.83.
• the difference between the diameters, outside D2 and inside D1 is small and allows for example to have a rigid axis and to be able to hollow out the center of the tree.
• the pivot 1 can be hollowed out so as to be traversed by a shaft with a larger diameter than if the pivot had a square shape.
• Figures 5 and 6 show an arrangement for coupling two barrels 7, 8 in series coaxially.
• the two barrels 7, 8 are rotatable about a common axis connected in series, namely a first barrel 8 fixed to a shaft 9 having at one of its ends said bearing 2 and a second barrel 7 comprising said pivot 1 receiving said bearing 2 .
• FIG. 6 shows a sectional view of a coaxial coupling of two barrels 7, 8 in series.
• Each of the barrels 7, 8 comprises a barrel 13, 14 each serving as housing a spring 17 and pivoting to a barrel shaft for fixing the springs 17 by a hook on a bung.
• a first barrel shaft 8 is rotated by an outer wheel 12, the first barrel shaft 9 rotating a drum 13 of barrel 8.
• the barrel 13 of barrel 8 has a bearing 2 in which is embedded a pivot 1 made in a second shaft 1 1 cylinder 7.
• the first shaft 9 of barrel 8 freely rotates in the second shaft 1 1 cylinder 7.
• the spring 17, via a hook of the barrel shaft 9 rotates the drum 13 of the barrel 8.
• the drum 13 of barrel 8 comprises the bearing 2 ( Figure 5) in which is embedded a pivot 1 formed in the shaft 1 January barrel 7. This recess allows to couple the two barrels 7, 8 without additional room.
• the shaft 1 1 of barrel 7 rotates freely around the barrel shaft 9 and drives the spring 15 which rotates the drum 14 of barrel 7.
• a ring gear 16, integral with the drum 14 of the barrel 7, transmits the energy to the movement of the watch.
• the preferred geometric shape of the pivot 1 and the bearing 2 is triangular, but in undescribed variants, this geometric shape may be polygonal, for example pentagonal.
• This coaxial coupling of two watch components makes it possible to save space in a movement, be it a wristwatch, a pocket watch or a table clock.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Sliding-Contact Bearings (AREA)
• Pivots And Pivotal Connections (AREA)
• Electromechanical Clocks (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=59012737

Family Applications (1)

Country Status (7)

Family Cites Families (17)

• 2015
  • 2015-12-10 CH CH01809/15A patent/CH711870B1/fr not_active IP Right Cessation
• 2016
  • 2016-12-07 JP JP2018549637A patent/JP2018537696A/ja active Pending
  • 2016-12-07 WO PCT/IB2016/057410 patent/WO2017098418A1/fr active Application Filing
  • 2016-12-07 US US16/060,578 patent/US20190004479A1/en not_active Abandoned
  • 2016-12-07 EP EP16810076.6A patent/EP3387493A1/de not_active Withdrawn
  • 2016-12-07 CN CN201680079185.7A patent/CN108475038A/zh active Pending
  • 2016-12-07 RU RU2018123478A patent/RU2018123478A/ru not_active Application Discontinuation

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