EP3781834A1

EP3781834A1 - Articulating element for filtering and damping vibrations and articulating device

Info

Publication number: EP3781834A1
Application number: EP18721836.7A
Authority: EP
Inventors: Stéphane GENDRON; Roland Hercouet; Frédéric CANEVET; Anthony TALHOUËT
Original assignee: Cooper Standard Automative France SA
Current assignee: Cooper Standard Automative France SA
Priority date: 2018-04-17
Filing date: 2018-04-17
Publication date: 2021-02-24
Also published as: WO2019202217A1; US20210164531A1; CN112513490A; US11320014B2

Abstract

The invention relates to an articulating element (1) for damping vibrations between an inner mechanical element and an outer mechanical element, comprising a rigid inner reinforcement (2), a rigid outer reinforcement (3), and a ring (4) consisting of at least one vibration-damping elastomer material which extends radially around the axial direction (X) between the inner reinforcement (2) and the outer reinforcement (3). The invention is characterised in that the first side flank (41) of the ring (4) comprises a first ring portion (51, 52) defined by a first surface (411, 412) and a second ring portion (53, 54) defined by a second surface (413, 414), which are diametrally opposed in relation to the axial direction (X) and which have, along the axial direction (X), respectively a first axial elevation (X1, X2) and a second axial elevation (X3, X4) which is higher than the first axial elevation (X1, X2).

Description

Articulation of filtration and vibration damping and articulation device

The invention relates to a filtering articulation and vibration damping.

One field of application of the invention relates to articulation devices between two elements, in particular in the automotive sector.

Known such hinges, which include an inner frame mounted around an inner mechanical member, an outer frame attached to an outer mechanical member and a ring of an elastomeric material between the two frames, for filtering and damping vibrations between the two elements.

For example, in the automotive sector, the inner member is attached to the motor of a motor vehicle, while the outer member is fixed to the body of the motor vehicle, to achieve the elastic suspension of the motor on the checkout.

However, it has been observed that when the joint is subjected to a radial excitation, that is to say transverse to the axial direction surrounded by the articulation, of a certain frequency, it appears a resonance mode of the elastomer part of the joint, which generates a peak of stiffness at this frequency.

It follows that when one of the two elements is subjected to vibrations, a significant vibration energy is transmitted from this element to the other element by the joint, and therefore in the above example that the engine vibration are transmitted to the vehicle's cash desk.

The aim of the invention is to obtain a vibration-damping and filtering articulation, which can be mounted in a hinge device between the inner element and the outer element, which considerably reduces or eliminates the stiffness peaks due to to a resonance mode in case of radial excitation.

For this purpose, a first object of the invention is an articulation for filtering and damping vibrations between an internal mechanical element and an external mechanical element, the articulation comprising: a rigid inner frame, which surrounds an axial direction and which is intended to be fixed to the inner mechanical element to be inserted therein,

a rigid outer armature, which surrounds the axial direction and which is intended to be fixed to the outer mechanical element to surround it, and a ring of at least one elastomeric vibration damping material, which extends radially about the axial direction between the inner frame and the outer frame and which is attached to the inner frame and the outer frame, the ring having a first side flank and a second side flank, which are spaced apart from each other. one another along the axial direction and which join the inner frame to the outer frame. This ring may be for example of cylindrical or frustoconical shape.

According to one embodiment of the invention, the first lateral flank comprises at least a first ring portion limited by at least a first surface and at least a second ring portion limited by at least a second surface, which are diametrically opposed to the axial direction and which have along the axial direction respectively at least a first axial dimension and at least a second axial dimension greater than the first axial dimension.

Thanks to the invention, the articulation prevents the appearance of a stiffness peak related to a resonance mode for the radial excitations directed in the transverse direction. The fact that the first axial dimension is smaller than the second axial dimension creates an asymmetry of the ring portions of the elastomer ring in the transverse direction, which prevents amplification of the excitations applied along this transverse direction.

For example, in the case of a motor vehicle engine suspended from its body by the joint and for a horizontal axial direction, the fact that the first ring portion limited by the first surface and the second portion of ring limited by the second surface can be arranged one above the other prevents the development of a resonance peak for radial excitation directed vertically. The articulation thus makes it possible to prevent the engine vibrations from being amplified and transmitted from the engine to the body by means of the articulation. There may be provided a plurality of transverse directions meeting one or more first ring portions bounded by one or more first surfaces and one or more second ring portions bounded by one or more second axial dimension surfaces different from each other. .

According to one embodiment of the invention, the first axial dimension and the second axial dimension are taken with respect to the same transverse portion of the first lateral flank, the transverse portion being located in the same plane perpendicular to the axial direction and being distinct. of the first surface and the second surface.

According to one embodiment of the invention, the first axial dimension and the second axial dimension are taken for example with respect to a transverse plane passing through the middle of the first lateral flank.

According to one embodiment of the invention, the first surface and the second surface are situated respectively on the first axially projecting ring portion of the first lateral flank and on a second ring portion, projecting axially from the first lateral flank. . According to one embodiment of the invention, the first surface and the second surface are flat. Of course, the first surface and the second surface are planar could also be non-flat, for example being rounded.

According to one embodiment of the invention, the first surface and the second surface are flat and perpendicular to the axial direction.

According to one embodiment of the invention, the first ring portion extends along a first circular arc centered on the axial direction, the second ring portion extends along a second circular arc centered on the direction. axial.

According to one embodiment of the invention, the first ring portion and the second ring portion extend in a stepped manner around the axial direction.

According to one embodiment of the invention, the first surface and the second surface cover 360 ° around the axial direction. According to one embodiment of the invention, the first lateral flank comprises a plurality of first surfaces, which are angularly offset around the axial direction and which have respective first respective axial sides, different from one another, and a plurality of second surfaces, which are angularly offset about the axial direction and have respective second axial dimensions different from each other.

According to one embodiment of the invention, the first lateral flank comprises, as first ring portions, two planar projections, which start axially from the first lateral flank, which extend along two first arcs centered on the axial direction. whose first two surfaces are perpendicular to the axial direction, which are angularly offset around the axial direction and which have respective first respective axial dimensions from each other, and

the first lateral flank comprises, as second ring portions, two planar projections, which extend axially from the first lateral flank, which extend along two second arcs of a circle centered on the axial direction, the second surfaces of which are perpendicular to the direction axial, which are angularly offset about the axial direction and have respective second axial dimensions different from each other.

According to one embodiment of the invention, the first lateral flank has third transition surfaces between the first surface and the second surface.

A second object of the invention is a hinge device, characterized in that it comprises a first hinge as described above, a second hinge as described above and an external mechanical element, the mechanical element. outer wall having a wall defining a first housing in which is fitted the outer armature of the first joint and a second housing in which is fitted the outer armature of the second joint, the inner armature of the first joint and the inner armature of the second articulation being aligned and surrounding the same axial direction, the first axial dimension of the first articulation and the second axial dimension of the first articulation are taken with respect to the same transverse portion of the first lateral flank of the first articulation or at a first transverse plane passing through the middle of the first lateral flank of the first articulation. joint,

the first axial dimension of the second articulation and the second axial dimension of the second articulation are taken with respect to the same transverse portion of the first lateral flank of the second articulation or to a second transverse plane crossing the middle of the first lateral flank of the second joint,

the transverse portion of the first lateral flank of the first articulation or the first transverse plane being located in the same plane perpendicular to the axial direction and being distinct from the first surface of the first articulation and the second surface of the first articulation,

the transverse portion of the first lateral flank of the second articulation or the second transverse plane being located in the same plane perpendicular to the axial direction and being distinct from the first surface of the second articulation and the second surface of the second articulation,

the first surface of the first hinge being aligned along the axial direction with the first or second surface of the second hinge having the first or second axial dimension of the second hinge, different from the first axial dimension of the first surface of the first hinge; joint,

the second surface of the first hinge being aligned along the axial direction with the first or second surface of the second hinge having the first or second axial dimension of the second hinge, different from the second axial dimension of the second surface of the first hinge; joint.

According to one embodiment of the invention, the first lateral flank of the first hinge and the first lateral flank of the second hinge are turned axially outwards, the second lateral flank of the first hinge and the second lateral flank of the hinge. second articulation are turned axially towards each other.

According to one embodiment of the invention, the articulation device comprises an internal mechanical element, which is fitted into the armature inside the first joint and in the inner armature of the second joint.

The invention will be better understood on reading the description which follows, given solely by way of non-limiting example with reference to the accompanying drawings, in which:

FIGS. 1 to 4 are diagrammatic views respectively from the side, in perspective, in axial section and in axial section in perspective of an articulation according to one embodiment of the invention,

FIGS. 5 to 8 are diagrammatic side views, respectively, in perspective, in axial section and in perspective axial section of a hinge device, in which the hinge can be mounted according to an embodiment of the invention,

FIG. 9 is a diagrammatic view in axial section of a first example of elements, on which the articulation can be mounted according to one embodiment of the invention;

FIG. 10 is a schematic perspective view of a second example of an external mechanical element of a hinge device, in which the hinge can be mounted according to an embodiment of the invention,

FIG. 11 is a schematic perspective view of a third example of elements, on which the articulation can be mounted according to an embodiment of the invention,

FIG. 12 is a schematic perspective view of a fourth example of elements, on which the articulation can be mounted according to one embodiment of the invention,

FIG. 13 represents a developed profile of the axial dimensions of the first and second ring portions of a hinge according to one embodiment of the invention,

FIG. 14 represents a curve giving a stiffness having been measured as a function of the frequency for an articulation according to an embodiment of the invention, FIGS. 15, 16 and 17 schematically show respectively a side view, an axial section view and a stiffness measured as a function of frequency for a first comparative hinge device not having the first surface and the second following surface. the invention,

FIGS. 18, 19 and 20 schematically show respectively a side view, an axial sectional view and a stiffness measured as a function of frequency for a second comparative articulation device not having the first surface and the second following surface. the invention,

- Figures 21 and 22 are schematic views respectively in axial section and side of a hinge according to one embodiment of the invention.

In Figures 1 to 13, 21 and 22, the hinge 1 according to the invention comprises a rigid inner frame 2, a rigid outer frame 3 and a ring 4 in at least one elastomeric material.

The rigid inner armature 2 surrounds an axial direction X. This inner armature 2 may be tube-shaped, for example of circular inner cross-section around the axial direction X. The inner armature 2 may be for example made of synthetic material, for example plastic, or metal, for example aluminum.

The inner armature 2 is intended to be fixed to an inner mechanical element 100, for example by press fitting. To do this, the inner mechanical element 100 is inserted into the inner armature 2 along the axial direction X. In one embodiment, an inner mechanical element 100 of a motor vehicle can be provided, for example connected the engine of the motor vehicle, the engine may be an internal combustion engine or thermal and / or other such as for example an electric motor for propulsion of the vehicle in whole or in part. Examples of this inner mechanical motor vehicle element 100 are shown in FIGS. 9, 11 and 12. Of course, any other type of inner mechanical element 100 may be provided.

Around the inner armature 2 is fixed the ring 4 in at least one elastomeric material, for damping vibrations. The ring 4 is fixed for example by adhesion of the elastomeric material to the peripheral surface of In one embodiment, the ring 4 is made of or comprises rubber.

Around the ring 4 is fixed a rigid outer frame 3. The ring 4 and the outer frame 3 surround the axial direction X. The ring 4 extends radially around the axial direction X between the inner frame 2 and the external reinforcement 3. The outer reinforcement 3 is intended to be fixed to an external mechanical element 200, for example by press fit. When the outer mechanical element 200 is fixed to the outer armature 3, this external mechanical element 200 surrounds this outer armature 3 around the axial direction X. In one embodiment, an external mechanical element 200 can be provided. a motor vehicle, for example connected to the body of the motor vehicle. Examples of this external mechanical body element 200 motor vehicle body are shown in Figures 5 to 12. Of course, any other type of external mechanical element 200 may be provided.

In Figures 1 to 22, the axial direction X is a geometric or fictitious direction. The transverse directions and the transverse planes are fictitious and geometrical. Radial directions and diameters are fictitious and geometric. The transverse directions and the transverse planes are perpendicular to the axial direction X. The radial directions and the diameters are transverse directions intersecting the axial direction X. The ANG angles are fictitious and geometric and are taken by rotating around the axial direction X. The axial planes are fictitious and geometric and are the planes passing through the axial direction X.

A first lateral flank 41 of the ring 4 and a second lateral flank 42 of the ring 4 join the inner armature 2 to the outer armature 3. The first lateral flank 41 and the second lateral flank 42 are distant from each other. other along the axial direction X.

The first lateral flank 41 may comprise one or more transverse edge portions 40, which is (are) located in the same transverse plane and which may be circular around the axial direction X For example, there may be provided as a transverse edge portion 40 an inner flange 401 extending about the axial direction X against the inner frame 2. The portion 40 transverse edge of the first lateral flank 41 may also comprise an outer flange 402 extending around the axial direction X against the outer reinforcement 3. Between the inner flange 401 and the outer flange 402, the first lateral flank 41 comprises a flank 403, called intermediate flank 403.

The axial direction X is oriented from the second lateral flank 42 to the first lateral flank 41 of the articulation device 10 in which the articulation 1 must be mounted. In the following, the axial dimensions are taken along the axial direction X oriented from second flank 42 to the first flank 41 and may also be called axial heights.

In one embodiment, the inner flange 401 is more advanced in the outer direction X than the second outer flange 402. The intermediate flank 403 is provided in a recess 404 of the flank 41 between the outer flange 402 and the inner flange 401. flank 403 is, for example, inclined as it rises from the inner flange 401 to the outer flange 402, the flank 403 being partially conical.

According to the invention, the first lateral flank 41 comprises at least a first ring portion 51 limited by a first surface 411 having a respective first axial dimension XI and at least a second ring portion 53 bounded by a second surface 413, which is diametrically opposed to the first surface 411 with respect to the axial direction X and which has a second axial dimension X3 greater than the first axial dimension XI along the axial direction X.

The diametrically opposite portions or points of the first surface 411 or 412 and the second surface 413 or 414 are spaced at an ANG angle of 180 ° about the axial direction X and are at the same distance from this axial direction X.

Thus, a transverse diameter R (which crosses the axial direction X in a transverse plane) located between the first surface 411 and the second surface 413 meets two axial sides (or axial heights) XI and X3 different in the first lateral edge 41, and that this is shown in Figures 1, 2, 5, 6 and 22.

When a radial excitation is applied, the ring portions 51 and 53 limited respectively by the surfaces 411 and 413 of axial heights XI and X3 different from each other modify the modal behavior of the joint and thus oppose the establishment of a resonance and reduce the dynamic stiffness of the hinge 1. The first and second ring portions act as multiple vibration dampers (drummers) judiciously positioned. This makes it possible to reduce the level of the mode of the elastomer ring and consequently to reduce the vibration transmission from the inner reinforcement 2 to the outer reinforcement 3 (or vice versa) and therefore to their mechanical environment by the elements. 100 and 200.

The diameter R may be for example a vertical direction. For example, the hinge 1 may be arranged so that the second ring portion 53 and the ring portion 51 are vertical to one another.

The first axial rib XI and the second axial rib X3 can be taken for example with respect to the transverse portion 40 of the first lateral edge 41, which has its own constant axial dimension around the axial direction X. The transverse portion 40 is distinct from the first surface 411 and the second surface 413. For example, the first axial dimension XI and the second axial dimension X3 are taken with respect to the inner flange 401 or with respect to the outer flange 402, which each have their own axial dimension constant around the axial direction X.

The ring portions 51 and 53 (and / or the ring portions 52 and 54 described above) may have the same transverse thickness E and / or be situated approximately in the middle of the flank 41 and / or 403, this thickness E being shown in Figures 3 and 21. There is obtained a plurality of different masses 51 and 53 (and / or 52 and 54) modifying the modal behavior of the hinge 1.

In FIGS. 7, 21 and 22, the first axial rib XI and the second axial rib X 3 can be taken for example with respect to a transverse plane P passing through the flank 403. This transverse plane P passes, for example, through the intersection of the flank 41. and a cylinder C of diameter D passing through the middle of the flank 41 and / or 403 and / or passing through the middle of the ring portions 51 and 53 (and / or the middle of the ring portions 52 and 54.

In one embodiment shown in FIGS. 1 to 13, 21 and 22, the second lateral flank 42 has a transverse width smaller than that of its first lateral flank 4L. The ring 4 has a first portion 43 of a ring located on the side of the first lateral flank 41 and a second portion 44 of the ring located on the side of the second lateral flank 42 and connected to the first portion 43 of the ring, the second portion 44 of the ring having a transverse width smaller than that of the first portion 43 of a ring . The second rear portion 44 of the ring may be axially castellated. Between the first lateral flank 41 and the second lateral flank 42, the first portion 43 of the ring has an intermediate edge 45 of transverse width between those of the first flank 41 and the second flank 42. The outer reinforcement 3 externally covers the first portion. 43 of the ring, the first side edge 31 to the intermediate side 45. The outer frame 3 comprises a front portion 31 (for example circular cylindrical and covering the outer flange 402) which starts from the first lateral flank 41 and extends to the edge intermediate 45 by a rear portion 32 having a transverse width narrowing, for example in a frustoconical manner. In other embodiments, the rear portion 32 could be cylindrical about the axial direction X or other.

In one embodiment shown in FIGS. 1 to 13, 21 and 22, several ring portions 51 and 52 respectively limited by first surfaces 411, 412 which are angularly offset about the axial direction X and which have respective first axial dimensions XI, X2 different from each other, and for example two first ring portions 51 and 52 respectively limited by the first surfaces 411 and 412 and two second ring portions 53 and 54 limited respectively by the second surfaces 413 and 414. There may be provided a plurality of second ring portions 53 and 54, which are each diametrically opposed to the respective first ring portions 51 and 52, which are angularly offset about the axial direction X and which have respective second axial dimensions X3, X4 different from each other. The second axial dimension X4 of the second surface 414 is greater than the first axial dimension X2 of the first surface 412. These other first and second surfaces 412 and 414 make it possible to extend the angular range of use of the joint 1 around the axial direction X. For example, there may be 0 <X2 <X1 <X4 <X3, as shown in FIGS. 1 to 13, 21 and 22. Of course, only one, two or more two first ring portions 51 may be provided. Of course, only one, two, or more than two second ring portions 53 may be provided.

In an embodiment shown in FIGS. 1 to 13, 21 and 22, the first surface 411 is located on a first ring portion 51 projecting axially from the side 403 and the second surface 413 is located on a second ring portion. 53 protruding axially from the flank 403 and / or the first surface 412 is located on another first ring portion 52 projecting axially from the sidewall 403 and / or the second surface 414 is located on another second ring portion 53 making protruding axially from the flank 403. The first surface 411 and / or the second surface 413 and / or the first surface 412 and / or the second surface 414 may for example be flat, for example perpendicular to the axial direction X, as shown in FIGS. FIGS. 1 to 13, 21 and 22. The first surface 411 and / or 412 and the second surface 413 and / or 414 extend, for example, in a staggered manner around the axial direction X. As examples not shown, the first surface 411 and / or the second surface 413 and / or the first surface 412 and / or the second surface 414 are not flat and may be rounded or otherwise, for example.

In one embodiment shown in FIGS. 1 to 13, 21 and 22, the first ring portion 51 bounded by the surface 411 extends along a first arc of a circle centered on the axial direction X and the second ring portion. 53 limited by the surface 413 extends along a second arc centered on the axial direction X and / or the first ring portion 52 limited the surface 412 extends along another first arc of a circle centered on the axial direction X and / or the second ring portion 54 bounded by the surface 414 extends along another second arc of a circle centered on the axial direction X.

For example, the first ring portion 51 and / or 52 and the second ring portion 53 and / or 54 cover a 360 ° angle ANG about the axial direction X. This ensures that whatever the the first ring portion 51 and / or 52 and the second ring portion 53 and / or 54 around the axial direction X disposed horizontally, the vertical direction intersecting the axial direction X will always meet a portion of the first surface 411 and / or 412 and one part of second surface 413 and / or 414 having axial dimensions different from each other to oppose the establishment of a resonance in case of vertical excitation. Thus, according to one embodiment, is added to the sidewall 41 and / or 403 a ring formed of ring portions 51, 52, 53 and 54 of different masses modifying the modal behavior of the joint 1.

In one embodiment shown in FIGS. 1 to 13, 21 and 22, the first lateral flank 41 may comprise a third transition surface 61 rising from the first surface 412 to the first surface 411, a third surface 62 of the rising transition of the first surface 412 to the second surface 413, a third transition surface 63 from the second surface 413 to the second surface 414 and a third transition surface 64 from the second surface 414 to the first surface 411. These surfaces 61, 62 , 63, 64 of transition have for example slopes greater than 45 ° and have for example a low slope relative to a transverse plane, for example a slope less than 20 ° relative to the axial direction X or are substantially axial.

In an embodiment shown in FIGS. 1 to 13, 21 and 22, each first ring portion 51 and 52 occupies for example an angular sector (ANG) of approximately 90 ° and each second ring potion 53 and 54 occupies for example an angular sector (ANG) of about 90 °. The axial dimensions XI, X2, X3, X4 can be multiple of a single step. The upper part of FIG. 13 represents, by way of example, in these cases, on the ordinates X, the axial dimensions X1, X2, X3 and X4 multiple of the same height pitch, as a function of the angular position ANG of the surfaces 411, 412. , 413 and 414 about the axial direction X abscissa, for the hinge 1 shown in Figures 1 to 12, 21 and 22.

Of course, any shape of the first and second surfaces, other than that shown in the figures, may be provided.

FIG. 14 represents, on the ordinate, the dynamic stiffness k measured (in N / min) as a function of the frequency f on the abscissa (in Hz) on an articulation 1 according to the embodiments described above with reference to FIGS. 1 to 13, 21 and 22. FIG. 14 shows that the stiffness k of the sleeve 1 according to the invention has a relatively flat spectrum of 0 to 1600 Hz with no significant resonance peak.

In contrast, FIG. 17 represents, on the ordinate, the dynamic stiffness k measured (in N / min) as a function of the frequency f in abscissa (in Hz) for a hinge device A according to FIGS. 15 and 16, which is not not according to the invention and which does not comprise the first and second ring portions according to the invention described above with reference to Figures 1 to 13, 21 and 22, but which comprises a flank 403 strictly conical and without projections between the outer flange 402 and the inner flange 401. FIG. 17 shows that this articulation A has a high resonance peak PR of its dynamic stiffness at a frequency of approximately 980 Hz in the case presented.

FIGS. 18 and 19 show another articulation device B, which is not according to the invention and which does not comprise the first and second ring portions according to the invention described above with reference to FIGS. 13, 21 and 22, but which has on the flank 403 a ring S with a totally flat surface and perpendicular to the axial direction X all around thereof between the outer flange 402 and the inner flange 401. FIG. the dynamic stiffness measured (in N / min) as a function of the abscissa frequency s (in Hz) for this sleeve B of FIGS. 18 and 19. FIG. 20 shows that this sleeve B comprises a first resonance peak P1 at a frequency about 650 Hz and a second resonance peak P2 for a frequency of about 1150 Hz in the case presented. This hinge device reduces the level of stiffness but in smaller proportions than the invention.

FIG. 14 thus shows that the invention makes it possible to suppress the resonance peaks of FIGS. 17 and 20.

In the embodiment of Figures 5 to 12, the hinge 1 is mounted in a hinge device 10, also called hinge 10. The hinge device 10 comprises at least one hinge 1 as described above. The articulation device 10 further comprises a second articulation 1 'according to the invention, similar to the articulation 1 described above, and the external mechanical element 200. The articulation device 10 makes it possible to connect the element mechanical outside 200 relative to the inner mechanical element 100 and can serve as a device for filtering and damping vibrations between the inner mechanical element 100 and the outer mechanical element 200.

The second hinge 1 'is for example identical to the hinge 1 of Figures 1 to 13, 21 and 22 or is similar to the first hinge 1 of the embodiments described above. The constituent parts of the second hinge 1 'are designated by the same reference signs as those of the first hinge 1, with the addition of the reference'.

The outer mechanical element 200 surrounds around the axial direction X the outer armature 3 of the first joint 1 and the outer armature 3 'of the second joint 1'. The outer mechanical element 200 comprises a wall 210 delimiting a first housing 201 in which is fitted the outer armature 3 of the first joint 1 and a second housing 202 in which is fitted the outer armature 3 'of the second joint 1' . In the outer mechanical element 200, the inner armature 2 of the first articulation 1 and the inner armature 2 'of the second articulation 2' are aligned and surround the same axial direction X. The wall 210 has for example an inner surface (turned towards the outer frames 3 and 3 ') cylindrical and circular around the axial direction X.

The wall 210 has on its inner surface, a rib 211, which is located inwardly projecting, which surrounds the axial direction X and which defines an axial opening 214 through which the second lateral edges 42 and 42 '. The rib 211 has for example a circular axial opening 214 around the axial direction X.

The joints 1 and 1 'are mounted by their second portion 44, 44' of ring against each other and opposite the inner rib 211 in the opening 214, the second side edges 42 and 42 'being the against the other in the opening 214. The rib 21 1 may comprise inclined flanks 212 from the opening 214 to the inner surface of the wall 201, the inclined flanks 212 being for example inclined or frustoconical in the same manner that the back part 32 to serve of support for this rear portion 32. The rib 211 is located between the intermediate edge 45 of the sleeve 1 and the intermediate edge 45 'of the sleeve 1

As previously, the first axial dimension XI and / or X2 of the first articulation 1 and the second axial dimension X3 and / or X4 of the first articulation 1 are taken with respect to the same transverse portion 40 (for example 401 or 402) of the first lateral flank 41 of the first articulation 1, and the first axial dimension XL and / or X2 'of the second articulation 1' and the second axial dimension X3 'and / or X4' of the second articulation L are taken with respect to the same transverse portion 40 'of the first lateral flank 4L of the first joint L, corresponding to the transverse portion 40 (for example 40 L corresponding to 401, or 402' corresponding to 402). As before, this transverse part 40, 401 or 402 is located in the same plane perpendicular to the axial direction X and is distinct from the first surface 411 and / or 412 and the second surface 413 and / or 414, the transverse part 40 ', 40 L or 402' of the first lateral flank 4L of the second articulation 1 'is situated in the same plane perpendicular to the axial direction X and is distinct from the first surface 41 L and / or 412' of the second articulation L and of the second surface 413 'and / or 414' of the second joint L. The first ring portion 51 is aligned (same ANG angle) along the axial direction X with the first or second ring portion 52 'or 53 'or 54' of the second hinge 1 'having the first or second axial dimension X2' or X3 'or X4' of the second hinge L, different from the first axial dimension XL The second ring portion 52 is aligned along of the directi axial X (same angle ANG) with the first or second ring portion 51 'or 53' or 54 'of the second joint 2 having the first or second axial dimension XL or X3' or X4 'of the second joint L different the second axial dimension X2. Thus, any axial plane intersects axial dimension surfaces different from each other. With this arrangement, the axially aligned ring portions of the first hinge 1 and the second hinge L, with their different axial sides, oppose the establishment of a resonance.

For example, as shown in FIGS. 8, 9 and 13, the first ring portion 51 is axially aligned with the second ring portion 54 'of the second hinge, the first ring portion 53 is axially aligned with the second ring portion 52 'of the second hinge G, the second ring portion 52 is axially aligned with the first ring portion 51' of the second hinge, the second ring portion 54 is axially aligned with the first ring portion 53 'of the second hinge 1'.

In another example, shown in FIG. 7, the second ring portion 52 is axially aligned with the first ring portion 53 'of the second hinge G, the second ring portion 54 and axially aligned with the first portion 5 G ring of the second hinge G, the first ring portion 51 is axially aligned with the second ring portion 52 'of the second hinge G, the first ring portion 53 is axially aligned with the second portion ring 54 'of the second joint G.

For example, we have 0 <X2 <X1 <X4 <X3 and 0 <X2 '<Xl' <X4 '<X3'.

As shown in Figures 7, 8 and 9 to 12, in the mounting position of the joints 1 and G in the outer mechanical element 200, the first side flanks 41 and 4G are rotated axially outwardly. Furthermore, in this embodiment, the articulation device 10 comprises the inner mechanical element 100, which is fitted into the inner armature 3 of the first articulation 1 and into the inner armature 3 'of the second articulation G The inner mechanical element 100 thus axially traverses the inner armatures 2 and 2 '. The inner mechanical element 100 and the outer mechanical element 200 may each have any shape. For example, in FIGS. 10 and 11, the outer mechanical element 200 comprises, in addition to the circular cylindrical wall 210, a tab 220 surrounding the wall 210 around the axial direction X and fastened to this wall 210, this tab 220 being able to to be fixed to the body of the motor vehicle, while the inner mechanical element 100 axially passing through the inner frame 3 and 3 'can be attached to the engine of the motor vehicle. For example, in FIGS. 9 and 12, the wall 210 is in one piece with a fixing member 230 comprising fastening lugs 231, for example at the body of the motor vehicle, while the inner mechanical element 100 traversing axially the inner armature 3 and 3 'may be rod-shaped having fixing members 101, for example here holes transversely traversing the element 100, to be attached to the engine of the motor vehicle.

Of course, the joints 1 and G may be cylindrical, frustoconical or any other form of revolution.

Of course, in another embodiment of the invention, the joints 1 and G may be one-piece, that is to say molded in one piece with one or more outer frame (s) and with a or several inner frame (s).

Of course, the above embodiments, features, possibilities, and examples can be combined with one another or be selected independently of one another.

Claims

Articulation (1) for filtering and damping vibrations between an inner mechanical element (100) and an outer mechanical element (200), the articulation (1) comprising:

a rigid inner armature (2), which surrounds an axial direction (X) and which is intended to be fixed to the inner mechanical element (100) to be inserted therein,

a rigid outer armature (3), which surrounds the axial direction (X) and which is intended to be fixed to the external mechanical element (200) to surround it, and

a ring (4) of at least one vibration damping elastomeric material, which extends radially around the axial direction (X) between the inner frame (2) and the outer frame (3) and which is attached to the inner armature (2) and the outer armature (3), the ring (4) having a first lateral flank (41) and a second lateral flank (42), which are spaced one from the other along the axial direction (X) and which join the inner armature (2) to the outer armature (3),

characterized in that the first lateral flank (41) comprises at least a first ring portion (51, 52) bounded by at least a first surface (411, 412) and at least a second portion (53, 54) of ring limited by at least a second surface (413, 414), which are diametrically opposed with respect to the axial direction (X) and which have along the axial direction (X) respectively at least a first axial dimension (XI, X2 ) and at least a second axial dimension (X3, X4) greater than the first axial dimension (XI, X2).

2. Articulation according to claim 1, characterized in that the first axial dimension (XI, X2) and the second axial dimension (X3, X4) are taken with respect to the same transverse portion (40) of the first lateral flank (41) , the transverse portion (40) being located in the same plane perpendicular to the axial direction (X) and being distinct from the first surface (411, 412) and the second surface (413, 414).

3. Articulation according to claim 1, characterized in that the first axial side (XI, X2) and the second axial dimension (X3, X4) are taken for example with respect to a transverse plane (P) passing through the middle of the first sidewall (41) lateral.

4. Articulation according to any one of the preceding claims, characterized in that the first surface (411, 412) and the second surface (413,

414) are located respectively on the first axially projecting ring portion (51, 52) of the first lateral flank (41) and on a second ring portion (53, 54) projecting axially from the first lateral flank (41). ).

5. Articulation according to any one of the preceding claims, characterized in that the first surface (411, 412) and the second surface (413,

414) are flat.

6. Articulation according to any one of the preceding claims, characterized in that the first surface (411, 412) and the second surface (413, 414) are flat and perpendicular to the axial direction (X).

7. Articulation according to any one of the preceding claims, characterized in that the first ring portion (51, 52) extends along a first arc of a circle centered on the axial direction (X), the second portion of ring (53, 54) extends along a second arc of a circle centered on the axial direction (X).

8. Articulation according to any one of the preceding claims, characterized in that the first ring portion (51, 52) and the second ring portion (53, 54) extend in a staggered manner around the axial direction (X).

9. Articulation according to any one of the preceding claims, characterized in that the first surface (411, 412) and the second surface (413, 414) cover 360 ° around the axial direction (X).

10. Articulation according to any one of the preceding claims, characterized in that the first lateral flank (41) comprises a plurality of first surfaces (411, 412), which are angularly offset around the axial direction (X) and which have respective first axial dimensions (XI, X2), different from each other, and a plurality of second surfaces (413, 414), which are angularly offset about the axial direction (X) and have second dimensions axial (X3, X4) respectively different from each other.

11. Articulation according to claim 10, characterized in that the first lateral flank (41) comprises, as first ring portions (51, 52), two projections (51, 52) planes, which depart axially from the first lateral flank ( 41), which extend along two first arcs centered on the axial direction (X), whose first two surfaces (411, 412) are perpendicular to the axial direction (X), which are angularly offset around the direction axial (X) and which have respective first axial dimensions (XI, X2) different from each other, and the first lateral flank (41) comprises, as second ring portions (53, 54), two projections (53, 54), which extend axially from the first lateral flank (41), which extend along two second arcs centered on the axial direction (X), the second surfaces (413, 414) are perpendicular to the axial direction (X), which are angularly offset around e the axial direction (X) and which have respective second axial dimensions (X3, X4) different from each other.

12. Articulation according to any one of the preceding claims, characterized in that the first lateral flank (41) has third surfaces (61, 62, 63, 64) of transition between the first surface (411, 412) and the second surface (413, 414).

13. Device (10) for articulation, characterized in that it comprises a first hinge (1) according to any one of the preceding claims, a second hinge (G) according to any one of the preceding claims and a mechanical element outside (200),

the external mechanical element (200) comprising a wall (210) delimiting a first housing (201) in which is fitted the outer armature (3) of the first articulation (1) and a second housing (202) in which is fitted the outer armature (3 ') of the second articulation (G), the inner armature (2) of the first articulation (1) and the inner armature (2') of the second articulation (2 ') being aligned and surrounding the same axial direction (X),

the first axial dimension (XI, X2) of the first articulation (1) and the second axial dimension (X3, X4) of the first articulation (1) are taken with respect to the same transverse part (40, 401, 402) of first lateral flank (41) of the first articulation (1) or a first transverse plane (P) passing through the middle of the first lateral flank (41) of the first articulation (1),

the first axial dimension (C, X2 ') of the second articulation () and the second axial dimension (X3', X4 ') of the second articulation () are taken with respect to the same transverse part (40', 40, 402 ') of the first lateral flank (4) of the second articulation () or at a second transverse plane (P') passing through the middle of the first lateral flank (41 ') of the second articulation (1'), the transverse part (40 ') 401, 402) of the first lateral flank (41) of the first articulation (1) or the first transverse plane (P) being situated in the same plane perpendicular to the axial direction (X) and being distinct from the first surface (411). 412) of the first hinge (1) and the second surface (413, 414) of the first hinge (1),

the transverse portion (40 ', 40, 402') of the first lateral flank (4) of the second articulation () or the second transverse plane (P ') being situated in the same plane perpendicular to the axial direction (X) and being distinct from the first surface (411 ', 412') of the second hinge (1 ') and the second surface (413', 414 ') of the second hinge (1'),

the first surface (411) of the first hinge (1) being aligned along the axial direction (X) with the first or second surface (412 ', 413', 414 ') of the second hinge () having the first or second axial dimension (X2 ', X3', X4 ') of the second articulation (), different from the first axial dimension (XI) of the first surface (411) of the first articulation (1),

the second surface (412) of the first hinge (1) being aligned along the axial direction (X) with the first or second surface (41, 413 ', 414') of the second hinge (2) having the first or second second axial dimension (C, X3 ',

X4 ') of the second articulation (), different from the second axial dimension (X2) of the second surface (412) of the first articulation (1).

Hinge device according to Claim 13, characterized in that the first lateral flank (41) of the first hinge and the first lateral flank (4G) of the second hinge (G) are rotated axially outwardly. second lateral flank (42) of the first articulation (1) and the second lateral flank (42 ') of the second articulation (1') are rotated axially toward each other.

15. Articulation device according to claim 13 or 14, characterized in that it comprises an inner mechanical element (100), which is fitted into the inner armature (3) of the first articulation (1) and into the inner frame (3 ') of the second joint (G).