Assembly of two micromechanical parts

Abstract

The invention relates to an assembly (10) comprising a first micromechanical part and a second micromechanical part (11, 20) joined to each other, the first part (11) comprising a plate (12) from which extends a connecting member (13) formed by a male body comprising at least one radial shoulder (130) forming a surface of revolution and at least one axial shoulder (131) formed by a radial extension shoulder (132) generating a thickening on the plate (12), the connecting member (13) on the first part (11) being joined in a pivoting connection with a complementary connecting member (21) on the second part in such a way that the second part is pressed against the axial shoulder (131) and the radial shoulder (130).

Description

Technical Field

[0001] This invention relates to the field of micromechanics, and more specifically to the field of horology.

[0002] More specifically, the present invention relates to an assembly comprising a first micromechanical component and a second micromechanical component. Background Technology

[0003] In the field of horology, when two parts assembled together are designed to pivot relative to each other, they are arranged to contact each other through radial and axial supports.

[0004] In particular, when gear 1 is fastened to allow rotatable movement on shaft 2 of moving member 3, gear 1 is axially supported on a support member on plate 4 formed on gear or pinion of moving member 3. This support member is typically formed by an annular recess 5, such as... Figure 1 The cross-sectional view is shown in the image. This type of design is often used, for example, as a boot date disk.

[0005] The annular recess 5 can be machined by turning or milling.

[0006] Milling can be performed using a cutting tool with a shape complementary to the annular recess 5. In this case, the tool moves downward along an axis passing through the center of the annular recess 5.

[0007] The disadvantage of this type of machining is that it requires specialized tools for each part with different dimensions or for each different recess contour.

[0008] The annular recess 5 can also be produced by milling using conventional cutting tools. However, when this operation is feasible, it can be complicated because the distance between the annular recess 5 and the axis 2 of the moving part 3 limits the maximum diameter of the cutting tool, and this size can be very small, for example, about one-tenth of a millimeter.

[0009] Regardless of the method used to manufacture the annular recess 5, its use is time-consuming and expensive due to its very small size and shape.

[0010] Therefore, it is necessary to design a component whose parts are easier to manufacture. Summary of the Invention

[0011] The present invention overcomes the aforementioned disadvantages, and to this end, relates to an assembly comprising a first micromechanical part and a second micromechanical part that engage with each other. The first part comprises a plate from which a connecting member formed by a protruding body extends, the protruding body including at least one radial shoulder forming a surface of revolution, and at least one axial shoulder formed by a radially extending shoulder and forming a thickened portion on the plate.

[0012] The connecting member on the first part engages with the complementary connecting member on the second part in a pivotal manner, such that the second part presses against the axial shoulder and the radial shoulder.

[0013] Because of these characteristics, the parts in the assembly are relatively easy to machine using conventional cutting tools.

[0014] In certain embodiments, the invention may further include one or more of the following features, which may be employed individually or in any technically possible combination.

[0015] In a particular embodiment, the connecting member includes at least one axial groove for reducing the contact surface between the first part and the second part and extending between a distal end opening at a free end of the connecting member and a proximal end opening at the axial shoulder or one of the axial shoulders.

[0016] In a particular embodiment, the connecting member includes at least three radial shoulders that are spaced apart from each other by uniformly spaced grooves, such that the radial shoulders extend to cover substantially the same corner sector.

[0017] In a particular embodiment, the radial shoulder, or one of the radial shoulders, is capable of elastic deformation in the radial direction, the radial shoulder deforming when the connecting member engages with the complementary connecting member on the second part.

[0018] In a particular embodiment, the deformable radial shoulder is formed by an elastic sheet extending along a curved direction.

[0019] In a particular embodiment, the elastic sheet is configured to extend radially beyond the rotating surface. Attached Figure Description

[0020] Other features and advantages of the invention will become apparent from the following detailed description, which is given by way of non-limiting example and with reference to the accompanying drawings: - Figure 1 A perspective view of a gear rotatably fastened to a shaft of a moving part according to a prior art design is shown. - Figure 2 This image shows a close-up perspective view of a connecting member on a first part of an assembly of micromechanical parts according to an exemplary embodiment of the present invention. - Figure 3 schematically shown Figure 2 The first part and the second part are joined to form a cross-sectional view of the assembly according to an exemplary embodiment of the present invention. - Figure 4 and Figure 5 Other exemplary embodiments of the present invention are shown. Figure 2 A perspective view of the first part in the diagram.

[0021] It should be noted that, for clarity, the accompanying drawings are not necessarily drawn to scale. Detailed Implementation

[0022] The present invention relates to a component 10, the component 10 comprising a first micromechanical part 11 and a second micromechanical part 20 engaged with each other via a connecting pivot.

[0023] Figure 2 A first part 11 of component 10 in a first exemplary embodiment of the present invention is shown. Component 10 in Figure 3 The image is shown in a cross-sectional view.

[0024] The first part 11 includes a plate 12 from which a connecting member 13 formed by a protruding body extends, and when the first part 11 and the second part 20 are assembled, a complementary connecting member 21 on the second part 20 engages with the connecting member 13.

[0025] The connecting member 13 may be in the form of a spindle, rod, column, pin, or any other protruding shape. The connecting member 13 includes at least one radial shoulder 130 defining a surface of rotation, and at least one axial shoulder 131 formed by a radially extending shoulder 132 and creating a thickened portion on the plate 12, such as... Figure 3 As can be seen in the text.

[0026] The rotating surface formed by the radial shoulder 130 is preferably in the shape of a straight cylinder, but may alternatively be any other geometry.

[0027] The connecting member 13 on the first part 11 is configured such that when it engages with the complementary connecting member 21 on the second part, the second part presses against the radial shoulder 130 and the axial shoulder 131.

[0028] Advantageously, the connecting member 13 may include at least one axial groove 133, such as a slot, for reducing the contact surface between the connecting member 13 and the second part 20. Such a groove 133 has a distal end opening onto the free end (i.e., its tip) of the connecting member 13, and a proximal end opening onto the axial shoulder or one of the axial shoulders 131 at the base of the connecting member. In particular, as... Figure 2 , 4As shown in Figures 5 and 6, the axial shoulders or each axial shoulder 131 extends to cover an angular sector corresponding to the width of the groove 133, such that the axial shoulders or each axial shoulder 131 extends only facing the groove 133. Therefore, the axial shoulders (multiples) 131 and the radial shoulders (or multiple radial shoulders) 130 extend along strictly different angular sectors, which prevents the second part 20 from pressing against the neck molding machined at the base of the radial shoulders (or multiple radial shoulders) 130 during the formation of the connecting member 13, and thus avoids any uncertainty in the position of the second part 20.

[0029] The groove (or multiple grooves) 133 further reduces the risk of the second part 20 warping.

[0030] exist Figure 2 In the exemplary embodiment of the invention shown, the connecting member 13 includes three radial shoulders 130, which are spaced apart from each other by recesses 133. The recesses 133 are spaced evenly around the connecting member 13, for example, such that the radial shoulders 130 extend to cover, for example, the same angular sectors as each other. Advantageously, the mechanical connection is balanced.

[0031] Advantageously, such as Figure 4 and Figure 5 As can be seen in the exemplary embodiments, the connecting member 13 can be configured such that at least one of the radial shoulders 130 can elastically deform in the radial direction. The deformable radial shoulders 130 are designed to deform when the connecting member 13 engages with the complementary connecting member 21 on the second part 20, in order to further control the mechanical clearance between the connecting member 13 and the complementary connecting member 21.

[0032] The deformable radial shoulder 130 is preferably formed of an elastic sheet 134, such as Figure 4 As can be seen, the elastic sheet 134 includes two longitudinal ends through which it is connected to the connecting member 13. Alternatively, as... Figure 5 As can be seen, the elastic sheet 134 can be connected to the connecting member 13 at only one end, leaving the other end free. In both exemplary embodiments, the elastic sheet 134 extends along a curved direction preferably centered on the axis of rotation of the surface of rotation formed by the radial shoulder 130.

[0033] It is also foreseeable that the elastic plate 134 is configured to extend radially beyond the rotating surface formed by the radial shoulder 130. In this case, the second part 20 has one or more radial notches, for example formed by teeth, which can engage with the plate to form a pawl or any other angular position indexing mechanism.

[0034] The elastic sheet 134 is produced by machining openings 135 in the connecting member 13 and in the plate 12, such as Figure 4 and Figure 5 As can be seen in the text.

[0035] Given the characteristics of the present invention, manufacturing the first part 11, and in particular machining the connecting member 13, is particularly easy, because machining can be performed with a single conventional cutting tool, such as a double-edged milling cutter.

[0036] More generally, it should be noted that the embodiments and uses considered above have been described by way of non-limiting example, and other variations are conceivable.

[0037] In particular, Figures 2 to 5 In the diagram, connecting member 13 is shown having a radial shoulder 130 on its outer periphery, and complementary connecting member 21 is shown in... Figure 3 The connection member 13 is shown pressing against the radial shoulder 130 on its inner periphery, but it is foreseeable that the radial shoulder 130 is arranged on the inner periphery of the connecting member 13 and the complementary connecting member 21 presses against the radial shoulder 130 on its outer periphery.

[0038] Therefore, the connecting member 13 can be formed by a cavity, in which a complementary connecting member 21 formed by a protruding body (such as a spindle, rod, pin, column, etc.) engages.

Claims

1. A component (10) comprising a first micromechanical part and a second micromechanical part (11, 20) coupled to each other, characterized in that, The first part (11) includes a plate (12) from which a connecting member (13) formed by a protruding body extends, the protruding body including at least one radial shoulder (130) forming a rotating surface and at least one axial shoulder (131) formed by a radially extending shoulder (132) and forming a thickened portion on the plate (12), the connecting member (13) on the first part (11) engaging with a complementary connecting member (21) on the second part (20) in a pivotal connection such that the second part (20) presses against the axial shoulder (131) and the radial shoulder (130), the connecting member (13) including at least one axial groove (133) for reducing the contact surface between the first part and the second part (11, 20) and extending between a distal end opening at a free end of the connecting member (13) and a proximal end opening at the axial shoulder or opening at one of the axial shoulders (131).

2. The component (10) according to claim 1, wherein, The connecting member (13) includes at least three radial shoulders separated from each other by evenly spaced grooves (133), such that the radial shoulders extend to cover substantially the same corner sector.

3. The component (10) according to claim 1 or 2, wherein, The radial shoulder (130) or one of the radial shoulders is capable of elastic deformation in the radial direction, and the radial shoulder (130) deforms when the connecting member (13) engages with the complementary connecting member (21) on the second part.

4. The component (10) according to claim 1 or 2, wherein, The deformable radial shoulder (130) is formed by an elastic sheet (134) extending along the curved direction.

5. The component (10) according to claim 4, wherein, The elastic sheet (134) is configured to extend radially beyond the rotating surface.

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