CH712128A2 - Timepiece comprising a tourbillon mechanism. - Google Patents

Abstract

The invention relates to a timepiece comprising a tourbillon mechanism comprising: a first fixed wheel (8) fixedly mounted on a frame in a plane parallel to the plane of the frame, a first cage (10) intended to be driven by a source of energy and mounted rotatably on said frame, along a first axis perpendicular to the plane of the frame, said first cage (10) carrying a second fixed wheel (12), a second cage (14) pivotally mounted on the first cage ( 10) along a second axis, via a pinion engaged with the first fixed wheel, said second cage (14) carrying an escapement mechanism pivoted on at least one cage bridge and comprising in particular a balance (24) and a pinion of exhaust (26) engaged with the second fixed wheel (12). According to the invention, said first axis and said second axis are perpendicular, and the balance (24) is pivoted along an axis parallel to the second axis.

Description

Description TECHNICAL FIELD [0001] The present invention relates to the field of watchmaking. It relates, more particularly, to a timepiece comprising a tourbillon mechanism comprising: a first fixed wheel fixedly mounted on a frame in a plane parallel to the plane of the frame; a first cage intended to be driven by a source of energy and mounted rotatably on said frame, according to a first axis perpendicular to the plane of the frame, said first cage carrying a second fixed wheel, - a second cage pivotally mounted on the first cage along a second axis, via a pinion engaged with the first fixed wheel, said second cage carrying an escapement mechanism pivoted on at least one cage bridge and comprising in particular a rocker arm and an escape pinion engaged with the second fixed wheel.

State of the art [0002] Since the invention of the vortex by Breguet, intended to average the errors due to the influence of gravity on the course of a conventional exhaust, and to occupy the latter successive positions, according to A rotation around a given axis, this complication has caused many adaptations, particularly in recent years.

The rotation around an axis is not sufficient to actually offer a walk almost independent of Earth's gravity, it has sought to make vortices rotating around two or three axes. A large number of mechanism variants have already been realized, but some have not yet been proposed. The object of the present invention is to propose a new two-axis tourbillon alternative.

Disclosure of the invention [0004] More specifically, the invention relates to a timepiece as defined in the claims.

BRIEF DESCRIPTION OF THE DRAWINGS Further details of the invention will appear more clearly on reading the description which follows, made with reference to FIG. 1 attached, representing the essential elements of a timepiece according to the invention.

Embodiment of the Invention [0006] FIG. 1 a tourbillon mechanism of a timepiece according to the invention. Other elements that are not part of the vortex are conventional and do not need to be represented or described.

The vortex thus comprises a first fixed wheel 8 fixedly mounted on a frame in a plane parallel to the plane of this frame. The first fixed wheel 8 has a toothing in the field, projecting from the plane of the fixed wheel.

The vortex further comprises a first cage 10 to be driven by a power source and rotatably mounted on the frame, according to a first axis perpendicular to the plane of the frame. In other words, the bridges forming the first cage 10 are located in planes substantially parallel to the plane of the frame. The first cage 10 carries a second fixed wheel 12 whose role will appear later. The first cage 10 is secured to a cage pinion, not visible in the figure, kinematically connected to the barrel of the timepiece.

The vortex further comprises a second cage 14 pivotally mounted on the first cage 10 along a second axis. To do this, a shaft 16 is pivoted in two bearings arranged in two bridges 18 integral with the first cage 10 and projecting with respect to the general plane of the first cage 10. The second fixed wheel 12 is fixedly mounted on a bridges 18, for example on a tube 20 fixed to the bridge, in which is guided the shaft 16. The second cage 14 is pivoted via a pinion engaged with the first fixed wheel, integral with the shaft 16. It could also imagine that the second cage is mounted flying, that is to say that it is pivoted only on a pivoting means, cantilever.

The second cage 14 carries an escapement mechanism pivoted on at least one cage bridge 22 and comprising in particular a rocker 24 and an exhaust pinion 26 engaged with the second fixed wheel 12.

According to a particular aspect of the invention, the first axis and the second axis are perpendicular, and the rocker 24 is pivoted along an axis parallel to the second axis. Thus, the balance 24 and the other members of the escapement are positioned in planes perpendicular to the plane of the frame of the timepiece, while pivoting, both around their own axis of rotation, parallel to the second axis and while performing a revolution around the first axis. It will be noted, particularly, that the axis of the balance 24 is parallel to the axis of the exhaust pinion 26, that is to say that the assortment can be of conventional type, without having cooperation between mobiles that work in perpendicular planes.

Preferably, the first cage 10 is mounted flying on the frame of the timepiece, that is to say that it is pivoted either on one side, or by guide means or lateral pivoting. There is no step

Claims (6)

masking the exhaust, at least on the side of the timepiece dial, or on both sides if the first cage 10 is laterally pivoted. Those skilled in the art can choose the gear ratios of the different elements of the vortex so that the first and second cage 14 rotate at different speeds around their respective axis, for example at the rate of 1 turn in 10 minutes for the first cage 10 and 1 turn in 60 seconds for the second cage 14. [0014] Thus, in operation, the first cage 10 is rotated by the cylinder, along the first axis. In its rotation, it causes the pivoting of the second cage 14 along the second axis, by meshing of the pinion with the first fixed wheel. The rotation of the second cage 14 generates the rotation of the escapement mobile by meshing of the exhaust pinion 26 with the second fixed wheel 12 and thus brings a torque to the exhaust, to maintain the pendulum oscillations 24. Claims 1. Timepiece comprising a vortex mechanism comprising: - a first fixed wheel (8) fixedly mounted on a frame in a plane parallel to the plane of the frame, -a first cage (10) intended to be driven by a light source; energy and mounted rotatably on said frame, along a first axis perpendicular to the plane of the frame, said first cage (10) carrying a second fixed wheel (12), - a second cage (14) pivotally mounted on the first cage ( 10) along a second axis, via a pinion engaged with the first fixed wheel, said second cage (14) carrying an escapement mechanism pivoted on at least one cage bridge and comprising in particular a balance (24) and a pinion of escapement (26) engaged with the second fixed wheel (12), characterized in that said first axis and said second axis are perpendicular, and in that the rocker (24) is pivoted along an axis parallel to the second axis. 2. Timepiece according to claim 1, characterized in that the axis of the balance (24) is parallel to the axis of the exhaust pinion (26). 3. Timepiece according to one of the preceding claims, characterized in that the second fixed wheel (12) is mounted on a shaft (16) arranged along the second axis. 4. Timepiece according to one of the preceding claims, characterized in that the first cage (10) is mounted flying. 5. Timepiece according to one of the preceding claims, characterized in that the first (10) and second (14) cages are arranged to rotate at different speeds. 6. Timepiece according to one of the preceding claims, characterized in that the second cage is pivoted in a flying manner on the first cage.