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Assembly comprising a rotating wheel made of non-magnetic

A technology of non-magnetic materials and rotating wheels, which is applied in the field of watches and clocks, and can solve problems such as the influence of movement accuracy

Pending Publication Date: 2022-07-29
ETA SA MFG HORLOGERE SUISSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After several shocks of this type, the pivot quickly experiences premature wear, which in turn affects the precision of the movement

Method used

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  • Assembly comprising a rotating wheel made of non-magnetic
  • Assembly comprising a rotating wheel made of non-magnetic
  • Assembly comprising a rotating wheel made of non-magnetic

Examples

Experimental program
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Embodiment Construction

[0068] As mentioned above, the present invention relates to an assembly comprising a rotating wheel and a bearing, such as a jewel, especially for a timepiece. The gemstone is intended to be in contact with the pivot of the rotating wheel to allow the pivot to rotate with minimal friction. However, such an assembly is not limited to the field of timepieces, and can be applied to any component that is rotatably mounted relative to the bearing.

[0069] The gemstone is preferably formed from alumina or zirconia having a crystal structure of the monocrystalline or polycrystalline type. The gemstones form guide elements intended, for example, to be installed in shock absorber bearings of timepieces.

[0070] exist figure 2In it, a hole 8 intended to receive a pivot 17 (also called a trunnion) penetrates the jewel 20 of the assembly 10 . The gemstone 20 includes an upper surface 5 and a lower surface 6 , one of which includes a tapered portion 12 communicating with the through ...

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Abstract

The invention relates to an assembly (10), in particular for a timepiece, comprising a rotating wheel provided with at least one pivot (17), said pivot at least partially comprising a non-magnetic material, preferably consisting entirely of a non-magnetic material, and a bearing comprising a surface (6, 26), the invention relates to a bearing (10) comprising a non-magnetic pivot (17) having a surface provided with a hole (8, 28) formed in the body of the bearing, the surface having a functional geometry at the entrance of the hole (8, 28), the functional geometry being in the shape having a tapered portion (12, 22), the non-magnetic material of the pivot (17) comprising an alloy selected from a material comprising copper, a material comprising palladium or a material comprising aluminum. The invention also relates to a timepiece comprising such an assembly (10).

Description

technical field [0001] The present invention relates to an assembly comprising a rotating wheel provided with a pivot made of non-magnetic material and a bearing provided with a tapered portion, in particular for a timepiece. [0002] The invention also relates to a timepiece comprising such an assembly. Background technique [0003] In the state of the art in the watch industry, a rotating wheel, such as a balance wheel, usually includes two pivots, the ends of which are inserted into gemstones so as to be able to rotate. Typically, ruby ​​or sapphire type gemstones are used to form endstones (endstones) or guiding elements called bearings. Bearings can also be metallic. These endstones and guide elements are intended to be in contact with the pivot so that the pivot is in rotational motion with minimal friction. Thus, they form, for example, all or part of the bearing seat of a rotatably mounted wheel spindle. [0004] In principle, synthetic stones are used in watch m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04B31/008G04B31/004C22C5/04C22C5/06C22C5/08C22C30/02C22C21/06C22C21/08C22C21/10
CPCG04B31/008G04B31/004C22C5/04C22C5/06C22C5/08C22C30/02C22C21/06C22C21/08C22C21/10G04B13/02G04B43/007C22C30/00G04B31/0082G04B31/08G04B31/06
Inventor C·鲁赫蒂X·贝尔达F·科勒
Owner ETA SA MFG HORLOGERE SUISSE
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