Anti-vibration mount and vehicle equipped with such an anti-vibration mount.

Abstract

Anti-vibration mount (1) comprising a first frame (2), a second frame (3), and a suspension (4) connecting the first frame to the second frame, the suspension being a composite assembly comprising a non-damping or weakly damping elastic material (6) combined with a damping material (7). The elastic material determines the static stiffness of the suspension. Abstract figure: Figure 6

Description

Title of the invention: Anti-vibration support and vehicle comprising such an anti-vibration support. Technical field

[0001] The present description relates to anti-vibration mounts and to vehicles comprising such anti-vibration mounts. Prior art

[0002] Document WO2008152284A1 describes an example of such an anti-vibration device. Abstract

[0003] The present description aims in particular to propose an anti-vibration support allowing effective filtering of high vibration frequencies, in particular for the support of electric motors of vehicles or mixed engine blocks of vehicles comprising an internal combustion engine and an electric motor.

[0004] To this end, the present description proposes an anti-vibration support adapted to filter and dampen vibrations between a first element and a second element, said anti-vibration support comprising: - a first frame adapted to be fixed to the first element, - a second frame adapted to be fixed to the second element, - a suspension connecting the first frame to the second frame, said suspension being a composite assembly comprising an elastic material associated with a damping material, said suspension allowing relative vibratory movements of the first frame with respect to the second frame at least in a first vibration direction, in which said elastic material is a non-damping or weakly damping material and determines a static stiffness of the suspension, said elastic material being adapted to support the weight of the second element, and in which the damping material is adapted to damp natural modes potentially excited by said vibratory movements.

[0005] Thanks to these arrangements, effective filtering of high frequency vibrations is ensured.

[0006] In particular, the appearance of natural modes of the anti-vibration support in the 200 - 3000 Hz range is avoided, or at least they are greatly attenuated, unlike anti-vibration supports whose elasticity and damping are both ensured by an elastomer body. This effect is achieved without the need to add beating masses as is the case with elastomer bodies, resulting in a significant weight saving.

[0007] In various embodiments of the anti-vibration support, one and / or the other of the following arrangements (alone or in all their mutual combinations) may optionally be used:

[0008] - said damping material has a damping factor greater than 10% in a temperature range of -30°C to 90°C and in a frequency range of said vibratory movements of 200 Hz to 3000 Hz;

[0009] - said elastic material has a damping factor of less than 7% in said temperature range from -30°C to 90°C and in said frequency range of said vibratory movements from 200 Hz to 3000 Hz;

[0010] - said elastic material has a Young's modulus greater than 5 GPa;

[0011] - said elastic material is chosen from: - a metallic material having a Young's modulus greater than 100 GPa and a damping factor less than 0.2% in said temperature range of -30°C to 90°C and in said frequency range of said vibratory movements of 200 Hz to 3000 Hz; - a thermoplastic material having a Young's modulus greater than 5 GPa and a damping factor less than 7% in said temperature range of -30°C to 90°C and in said frequency range of said vibratory movements of 200 to 3000 Hz; - a composite material comprising fibers embedded in a synthetic resin matrix, said composite material having a Young's modulus greater than 70 GPa and a damping factor less than 1% in said temperature range of -30°C to 90°C and in said frequency range of said vibratory movements of 200 Hz to 3000 Hz;

[0012] - the suspension has a dynamic stiffness of between 400 N / mm and 800 N / mm with respect to said vibratory movements (with a constant acceleration applied to the moving armature) according to the first vibration direction, in a frequency range of said vibratory movements from 200 Hz to 3000 Hz;

[0013] - said suspension allows relative vibratory movements of the first armature relative to the second armature also according to a second vibration direction perpendicular to the first vibration direction;

[0014] - the suspension comprises at least one suspension member having at least an elastic portion comprising said elastic material, said elastic portion extending between a first end connected to the first frame and a second end connected to the second frame;

[0015] - the damping material is at least partially overmolded on said portion elastic;

[0016] - the overmolded damping material has a thickness covering said portion elastic, said thickness (e) being less than L / 15, where L is a length of said elastic portion between said first end and said second end (the thickness in question may for example be of the order of 1.5 to 3 mm);

[0017] - the damping material is also overmolded on at least part of the first frame and / or second frame;

[0018] - said elastic portion comprises a first section where the damping material overmolding said elastic portion is integral with the first frame, a second section where the damping material overmolding said elastic portion is free and a third section where the damping material overmolding said elastic portion is integral with the second frame, the overmolded damping material having a thickness (e) covering said second section of the elastic portion, said thickness (e) being less than L / 30, where L is a length of said elastic portion between said first end and said second end;

[0019] - the first end of the elastic portion is secured to a first fixed anchor to the first frame and the second end of the elastic portion is secured to a second anchor fixed to the second frame;

[0020] - the first frame extends parallel to a central axis perpendicular to the first vibration direction, the first armature comprising external grooves parallel to the central axis, the second armature is annular and surrounds said first armature and said central axis, the second armature comprising internal grooves parallel to the central axis, the first anchor is fitted into the external grooves of the first armature, and the second anchor is fitted into the internal grooves of the second armature;

[0021] - said at least one suspension member comprises a single elastic portion in tongue shape;

[0022] - the first frame extends parallel to a central axis perpendicular to the first vibration direction, the second armature is annular and surrounds said first armature and said central axis, the anti-vibration support comprising several suspension members angularly distributed around the central axis and the elastic portion of each suspension member being arranged so as to extend substantially in a spiral between the first end and the second end of said elastic portion, said elastic portion having a width parallel to the central axis;

[0023] - said at least one suspension member comprises two elastic portions in tab-shaped, the first ends of the two elastic portions being integral with each other and the second ends of the two elastic portions being integral with each other, each elastic portion having a width parallel to the central axis and the two elastic portions being curved away from each other between the first and second ends;

[0024] - said elastic portion is made of said elastic material;

[0025] - said elastic portion comprises two parallel elastic blades made up of said elastic material, separated by a layer of said damping material which adheres to the two elastic blades;

[0026] - said layer of said damping material has a thickness less than L / 30, where L is a length of said elastic portion between said first end and said second end (the thickness in question may for example be of the order of 1.5 to 3 mm);

[0027] - said elastic portion is deformable in flexion when the second reinforcement moves relative to the first armature at least in the first vibration direction;

[0028] - the second element is a vehicle power unit;

[0029] - said damping material has a mass less than 20% of a total mass of the anti-vibration support.

[0030] Furthermore, the present description also relates to a vehicle comprising a body, a power unit and at least one anti-vibration support as defined above connecting the body to the power unit.

[0031] The power unit may comprise at least one electric motor.

[0032] Finally, the present description also relates to a method of manufacturing a anti-vibration support as defined above, the suspension of which comprises at least one composite part comprising a thermoplastic or thermosetting matrix reinforced with fibers, said fibers being wound between return elements and tensioned, said method comprising the production of a fiber structure, pre-impregnated or not, through the following operations:

[0033] - align and juxtapose the fibers, while stretching them between return elements, and keeping them apart from each other, so as to obtain a first layer,

[0034] - superimposing on said first layer, a second layer obtained in a manner identical to the first, where the fibers are parallel to those of the first layer, and kept apart from said fibers of the first layer,

[0035] - repeat the layering operation until the desired thickness is obtained. Brief description of the drawings

[0036] Other characteristics and advantages of the anti-vibration support will appear during the following description of two of its embodiments, given as non-limiting examples, with reference to the attached drawings.

[0037] In the drawings:

[0038] [Fig-1] [Fig. 1] is a schematic diagram showing a vehicle whose power unit can be supported in particular by one or more anti-vibration supports according to the present description.

[0039] [Fig.2] [Fig.2] is a perspective view of a vehicle power unit connected to the vehicle body by anti-vibration mounts according to this description.

[0040] [Fig.3] [Fig.3] is a perspective view of an anti-vibration support according to a first form of embodiment.

[0041] [Fig.4] [Fig.4] is a view similar to [Fig.3], seen from the rear.

[0042] [Fig.5] [Fig.5] is a view similar to [Fig.4], partially exploded.

[0043] [Fig.6] [Fig.6] is a cross-sectional view of the anti-vibration support of the [Fig.3],

[0044] [Fig.7] [Fig.7] is a perspective view of the anti-vibration support of [Fig.3], without the overmolded cushioning material.

[0045] [Fig.8] [Fig.8] is a perspective view similar to [Fig.3], in a second embodiment.

[0046] [Fig.9] [Fig.9] is a view similar to [Fig.8], seen from the rear.

[0047] [Fig. 10] [Fig. 10] is a front view of the anti-vibration mount of [Fig.8].

[0048] [Fig. 11] [Fig. 11] is a front view of the anti-vibration support, locally cut, in a third embodiment.

[0049] [Fig. 12] [Fig. 12] is a perspective view of the anti-vibration mount of [Fig.11], without the overmolded damping material.

[0050] [Fig. 13] [Fig. 13] is a view similar to [Fig. 12], seen in the opposite direction.

[0051] [Fig. 14] [Fig. 14] is an exploded view of the anti-vibration mount of [Fig. 11], without the overmolded cushioning material.

[0052] [Fig. 15] [Fig. 15] is a cross-sectional and perspective view of an anti-vibration support according to a fourth embodiment. More detailed description

[0053] In the various figures, the same references designate identical or similar elements.

[0054] [Fig.l] shows very schematically a vehicle V, in particular a motor vehicle, comprising a body CV (or a chassis) and a power unit M connected to the body CV by one or more anti-vibration supports 1, at least one of which corresponds to the present description.

[0055] The power unit M may in particular be an electric motor unit, or where appropriate a hybrid motor unit comprising an internal combustion engine and an electric motor used for the propulsion of the vehicle. In both cases, the operation of the electric motor generates relatively high vibrations. frequency, typically above 600 Hz or more generally in the range of 200 Hz to 3000 Hz.

[0056] As shown in [Fig.2], the anti-vibration support(s) 1 may be in the form of a sleeve centered on an axis X, for example substantially horizontal. Each anti-vibration support 1 in the form of a sleeve may be fitted into a housing 1a secured to the CV body.

[0057] Generally speaking, the present description proposes an anti-vibration support 1 adapted to filter and dampen vibrations between a first element and a second element (for example one consisting of the power unit M and the other of the body CV of the vehicle) mainly in a first vibration direction Z, said anti-vibration support 1 comprising: - a first frame 2 (for example metallic, or other) adapted to be fixed to the first element, - a second frame 3 (for example molded in synthetic resin, or other) adapted to be fixed to the second element, - a suspension 4 connecting the first frame to the second frame.

[0058] When the anti-vibration support 1 is in the form of a sleeve as in the particular examples described here, the first armature 2 can extend parallel to the central axis X while the second armature 3 is annular and surrounds said first armature 2 and said central axis X, the second armature 3 being able to be for example fitted into the housing described previously. The present description is however not limited to this sleeve configuration.

[0059] The suspension 4 is adapted to allow and dampen relative vibratory movements between the second frame 3 and the first frame 2 at least along the first vibration direction Z.

[0060] The suspension 4 being adapted to support a load, for example the weight of the second element (for example the power unit M) and / or an engine torque recovery load in the first vibration direction Z. The direction Z may be vertical as in the example shown, but it may be oriented differently. For example, the direction Z may possibly be horizontal when the load supported by the suspension 4 is an engine torque recovery load.

[0061] The suspension 4 can also be adapted to allow and dampen relative vibratory movements between the second armature 3 and the first armature 2 according to a second vibration direction Y perpendicular to the axis X and to the first vibration direction Z.

[0062] According to the present description, the suspension 4 is a composite assembly comprising an elastic material associated with a damping material. Said elastic material is a non-damping or weakly damping material, which determines a stiffness static of the suspension, said elastic material being adapted to support the aforementioned load.

[0063] The damping material is suitable for damping the natural modes potentially excited by said vibratory movements.

[0064] The damping material may be a viscoelastic material such as an elastomer. For example, the damping material may be a silicone-based elastomer, in particular the material marketed by the company Hutchinson under the brand Delta One ®, or a rubber-based elastomer, in particular the material marketed by the company Hutchinson under the brand Deltane ®.

[0065] The damping material may have a damping factor (delta tangent) greater than 10% in a temperature range of -30°C to 90°C and in a frequency range of said vibratory movements of 200 Hz to 3000 Hz.

[0066] The elastic material may have a damping factor of less than 7% in said temperature range of -30°C to 90°C and in said frequency range of said vibratory movements of 200 Hz to 3000 Hz. Said elastic material may have a Young's modulus of greater than 5 GPa. The Young's modulus values ​​given in the present description are measured at an ambient temperature of 20°C and with zero or substantially zero humidity.

[0067] According to a first example, the elastic material may be a metallic material (in particular a steel) having a Young's modulus greater than 100 GPa, and a damping factor less than 0.2% in said temperature range from -30°C to 90°C and in said frequency range of said vibratory movements from 200 Hz to 3000 Hz.

[0068] According to a second example, the elastic material may be a thermoplastic material (in particular PA6, PA6 / 6 or other) having a Young's modulus greater than 5 GPa, and a damping factor less than 7% in said temperature range from -30°C to 90°C and in said frequency range of said vibratory movements from 200 to 3000 Hz. The thermoplastic material may comprise a filler, for example consisting of short fibers of glass, carbon or basalt.

[0069] According to a third example, the elastic material may be a composite material comprising fibers (in particular continuous fibers, in particular glass, carbon or basalt fibers) embedded in a synthetic resin matrix, said composite material having a Young's modulus greater than 70 GPa, and a damping factor less than 1% in said temperature range from -30°C to 90°C and in said frequency range of said vibratory movements from 200 Hz to 3000 Hz. The synthetic resin matrix may be a thermoplastic material (in particular PA6, PA6 / 6 or other) or a thermosetting material (in particular epoxy or other)

[0070] The suspension may have a dynamic stiffness of between 400 N / mm and 800 N / mm (measured under constant acceleration applied to the first frame, for example 3 g) with respect to said vibratory movements in the first vibration direction, in a frequency range of said vibratory movements from 200 Hz to 3000 Hz.

[0071] This result is obtained because the anti-vibration support 1 can comprise a relatively small mass of damping material (for example less than 20% of the total mass of the anti-vibration support 1), since the damping material is not or almost not used to obtain the desired static stiffness of the anti-vibration support, this function being ensured by the elastic material. As a result, the natural modes of the suspension 4 are eliminated or greatly reduced throughout the 200 Hz -3000 Hz range. This therefore ensures effective filtering of high-frequency vibrations.

[0072] In the various embodiments described below with reference to Figures 3-15, the suspension may comprise at least one suspension member 5; 15, having at least one elastic portion 6; 16; 26 comprising said elastic material, said elastic portion extending between a first end connected to the first frame and a second end connected to the second frame. The anti-vibration support 1 may comprise several suspension members 5; 15 angularly distributed around the central axis X. Said elastic portion 6; 16; 26 is deformable in flexion when the first frame moves relative to the second frame at least in the first vibration direction Z and / or in the second vibration direction Y.

[0073] First embodiment

[0074] In the first embodiment, shown in Figures 3 to 7, the anti-vibration support comprises for example two suspension members 5 arranged substantially at 180 degrees from each other around the central axis X, or possibly more than two suspension members 5. The elastic portion 6 of each suspension member 5 can be arranged so as to extend substantially in a spiral between the first end 6a and the second end 6b of said elastic portion, said elastic portion 6 having a width [ parallel to the central axis X.

[0075] In the first embodiment, each suspension member 5 may comprise, for example, a single elastic portion 6 and each elastic portion 6 may, for example, be entirely made of said elastic material, and may be in the form of an elastic tongue or blade.

[0076] The first end 6a of the elastic portion 6 may comprise a first anchor 6a 1 fixed to the first frame 2 and the second end 6b of the elastic portion 6 may comprise a second anchor 6b 1 fixed to the second frame 3. The anchors 6al, 6bl may for example be edges of the elastic portion 6, making an angle for example of the order of 90 degrees with the rest of the elastic portion 6.

[0077] The first frame 2 may comprise, for example, L-shaped grooves open radially outwards and extending parallel to the central axis X, in which the anchors 6al of the elastic portions 6 can slide respectively, by fitting parallel to the axis X. The second frame 3 may comprise internal grooves 3b parallel to the central axis X in which the anchors 6b1 of the elastic portions 6 can slide respectively, by fitting parallel to the axis X. In the example shown, the grooves 3b may be made in internal ribs 3a of the second frame 3, each internal rib 3a having a hook-shaped section which internally delimits the groove 3b, which opens out in the vicinity of the internal cylindrical surface of the second frame 3.

[0078] The damping material 7 may be overmolded onto each elastic portion 6. The damping material 7 may optionally also be overmolded onto at least a portion of the first frame 2 and / or the second frame 3, in particular on the radially external face of the first frame 2 and / or on the radially internal face of the second frame 3.

[0079] The overmolded damping material 7 may have a thickness e covering said elastic portion 6, said thickness e being less than L / 15, where L is the length of said elastic portion 6 between said first end 6a and said second end 6b.

[0080] In the example shown, the elastic portion 6 comprises a first section 6c where the damping material 7 overmolding said elastic portion 6 is integral with the first reinforcement 2, a second section 6d where the damping material 7 overmolding said elastic portion 6 is free and a third section 6e where the damping material 7 overmolding said elastic portion 6 is integral with the second reinforcement 3. The thickness e of the damping material 7 covering said second section 6d of the elastic portion 6 may be less than L / 30.

[0081] The thickness e can for example be of the order of 1.5 to 3 mm.

[0082] The anti-vibration support 1 may further comprise a limiting member 8 for limiting the movements in the first vibration direction Z. The limiting member 8 may for example comprise a ring 8a fitted onto one end of the first armature 2 and an external elastomer lining 8b, comprising for example bosses 8c adapted to abut against the internal surface of the second armature 3.

[0083] Second embodiment

[0084] In the second embodiment, shown in Figures 8 to 10, the elastic portions 26 may be of a spiral shape similar to the first embodiment. The elastic portions 26 may for example be 4 in number, arranged for example at 90 degrees to each other around the central axis X. elastic portions 26 may optionally be arranged in pairs of diametrically opposed elastic members, the elastic portions 26 of one pair being oriented so that their spiral shape extends in one angular direction from the first end 26a to the second end 26b, while the elastic portions 26 of the other pair are oriented so that their spiral shape extends in the opposite angular direction from the first end 26a to the second end 26b.

[0085] The fixing of the first and second ends 26a, 26b of each elastic portion 26 respectively to the first and second frames 2, 3 can be carried out for example as in the first embodiment, with anchors 26al, 26b 1 fitted respectively in grooves 2a, 3b of the first and second frames 2, 3.

[0086] In this third embodiment, the elastic portions 26 may each comprise two parallel elastic blades 27 made of said elastic material, separated by a layer of said damping material 7 which adheres to the two elastic blades 27.

[0087] More generally, there could be a number N of elastic blades 27 separated respectively by a number Nl of layers of damping material 7, N being an integer at least equal to 2.

[0088] Said layer of said damping material 7 may have a thickness e1 less than L / 30, where L is the length of said elastic portion 26 between said first end 26a and said second end 26b. The thickness e& may for example be between 1.5 and 3 mm.

[0089] This sandwich structure of the elastic portion is possible for all shapes of the suspension 4.

[0090] In this second embodiment, the elastic portions 26 do not necessarily need to be overmolded with damping material 7, although this possibility is not excluded.

[0091] The anti-vibration support 1 may comprise a limiting member 8 as in the first embodiment. More generally, everything that has been described for the first embodiment and which is not contradicted by the above, is applicable to the second embodiment.

[0092] In this second embodiment, the anti-vibration support can be particularly light. In particular, the mass of damping material 7 can be reduced, since this material works in shear very effectively for damping. The mass of damping material 7 can be, for example, less than 5% of the total mass of the anti-vibration support 1.

[0093] Third embodiment

[0094] In the third embodiment, shown in Figures 11 to 14, the anti-vibration support comprises, for example, 4 suspension members 15 arranged substantially at 90 degrees to each other around the central axis X, or possibly a different number of suspension members 15.

[0095] Each suspension member 15 may comprise a pair of elastic portions 16 in the form of elastic tongues or blades, each formed entirely of elastic material. The first ends 16a of the two elastic portions 16 of each suspension member 15 are integral with each other and the second ends 16b of the two elastic portions 16 are integral with each other. The width [ of each elastic portion 16 is parallel to the central axis X and the two elastic portions 16 are curved, moving away from each other between the first and second ends, so as to work in flexion.

[0096] The first end 16a of the pair of elastic portions 16 may comprise a first anchor 16al fixed to the first frame 2 and the second end 16b of the pair of elastic portions 16 may comprise a second anchor 16b 1 fixed to the second frame 3.

[0097] In the example shown, the anchors 16al, 16b 1 may comprise portions of cylindrical walls centered on the axis X, which slide by fitting along the axis X into complementary grooves 12a, 13b formed respectively in the outer surface of the first reinforcement 2 and in the inner surface of the second reinforcement 3. In the example shown, the anchor 16al is a T-shaped rib received in a T-shaped groove 12a of the first reinforcement 2, and the anchor 16b 1 comprises lateral edges 16b2 which engage in the grooves 13b, which may be formed in ribs 13a projecting towards the inside of the second reinforcement 3, in a similar manner to the first embodiment.

[0098] The damping material 7 may be overmolded onto each elastic portion 16. The damping material 7 may optionally also be overmolded onto at least a portion of the first frame 2 and / or the second frame 3, in particular on the radially external face of the first frame 2 and / or on the radially internal face of the second frame 3.

[0099] The overmolded damping material 7 may have a thickness e covering said elastic portion 16, said thickness e being less than L / 15, where L is the length of said elastic portion 6 between said first end and said second end.

[0100] In the example shown, each elastic portion 16 comprises a first section 16c where the damping material 7 overmolding said elastic portion 16 is integral with the first frame 2, a second section 16d where the damping material 7 overmolding said elastic portion 16 is free and a third section 16e where the damping material 7 overmolding said elastic portion 6 is integral of the second frame 3. The thickness e of the damping material 7 covering said second section 16d of the elastic portion may be less than L / 30.

[0101] The thickness e can for example be between 1.5 and 3 mm.

[0102] The anti-vibration support 1 may further comprise a limiting member 8 similar to that of the first embodiment.

[0103] Fourth embodiment

[0104] The fourth embodiment is similar to the third embodiment and will therefore not be described again here. It differs from the third embodiment in that: - each suspension member 15 comprises a single elastic portion 16; - the second anchor 13b 1 is T-shaped and the groove 3b is also T-shaped.

[0105] Manufacturing methods

[0106] All or part of the suspension 4 of the anti-vibration support 1 can for example be obtained by 3D printing (or more generally by additive manufacturing).

[0107] Another known manufacturing method is described in document WO2019234625A1.

[0108] In this case, the suspension 4 may comprise at least one composite part comprising a thermoplastic or thermosetting matrix reinforced with fibres, said fibres being wound between return elements and placed under tension, this composite part being manufactured by a method comprising the production of a structure of fibres, pre-impregnated or not, through the following operations:

[0109] - align and juxtapose the fibers, while stretching them between return elements, and by keeping them apart from each other, so as to obtain a first layer,

[0110] - superimposing on said first layer, a second layer obtained in such a way identical to the first, where the fibers are parallel to those of the first layer, and kept apart from it,

[0111] - repeat the layering operation until the desired thickness is obtained.

Claims

1. Claims Anti-vibration support (1) adapted to filter and dampen vibrations between a first element (M) and a second element (CV), said anti-vibration support (1) comprising: - a first frame (2) adapted to be fixed to the first element (M), the first frame (2) extending parallel to a central axis (X), - a second frame (3) adapted to be fixed to the second element (CV), the second frame (3) being annular and surrounding said first frame (2) and said central axis (X), - a suspension (4) connecting the first frame (2) to the second frame (3), said suspension (4) being a composite assembly comprising an elastic material associated with a damping material (7), said suspension (4) allowing relative vibratory movements of the first frame (2) with respect to the second frame (3) at least in a first vibration direction (Z) perpendicular to the central axis (X), in which said elastic material is a non-damping or weakly damping material and determines a static stiffness of the suspension, in which the damping material (7) is adapted to damp natural modes potentially excited by said vibratory movements,wherein the suspension (4) has a dynamic stiffness of between 400 N / mm and 800 N / mm with respect to said vibratory movements in the first vibration direction (Z), in a frequency range of said vibratory movements from 200 Hz to 3000 Hz, wherein said damping material (7) has a mass less than 20% of a total mass of the anti-vibration support (1) wherein the suspension (4) comprises several suspension members (5; 15) angularly distributed around the central axis (X), each suspension member (5; 15) having at least one elastic portion (6; 26; 16) comprising said elastic material and having a width (Z) parallel to the central axis (X), said elastic portion (6; 26; 16) extending between a first end, (6a; 26a; 16a) connected to the first frame (2) and a second end (6b; 26b; 16b) connected to the second frame (3), and in which each suspension member (5; 15) comprises: A - either a single elastic portion (6; 26) in the form of a tongue and the elastic portion (6; 26) of each suspension member being arranged so as to extend substantially in a spiral between the first end (6a; 26a) and the second end (6b; 26b) of said elastic portion (6;26), B - either a single elastic portion (16) in the form of a tongue and the elastic portion (16) of each suspension member being curved between the first and second ends (16a, 16b), C - either two elastic portions (16) in the form of tongues, the first ends (16a) of the two elastic portions being integral with each other and the second ends (16b) of the two elastic portions being integral with each other, the two elastic portions (16) being curved while moving away from each other between the first and second ends (16a, 16b).;

2. Anti-vibration support (1) according to claim 1, wherein said damping material (7) has a damping factor greater than 10% in a temperature range of -30°C to 90°C and in a frequency range of said vibratory movements of 200 Hz to 3000 Hz.

3. Anti-vibration support (1) according to any one of the preceding claims, wherein said elastic material has a damping factor of less than 7% in said temperature range of -30°C to 90°C and in said frequency range of said vibratory movements of 200 Hz to 3000 Hz.

4. An anti-vibration mount (1) according to any preceding claim, wherein said elastic material has a Young's modulus greater than 5 GPa.

5. Anti-vibration support (1) according to any one of the preceding claims, wherein said elastic material is chosen from: - a metallic material having a Young's modulus greater than 100 GPa and a damping factor less than 0.2% in said temperature range of -30°C to 90°C and in said frequency range of said vibratory movements of 200 Hz to 3000 Hz; - a thermoplastic material having a Young's modulus greater than 5 GPa and a damping factor less than 7% in said range temperature range from -30°C to 90°C and in said frequency range of said vibratory movements from 200 to 3000 Hz; - a composite material comprising fibers embedded in a synthetic resin matrix, said composite material having a Young's modulus greater than 70 GPa and a damping factor less than 1% in said temperature range from -30°C to 90°C and in said frequency range of said vibratory movements from 200 Hz to 3000 Hz.

6. Anti-vibration support (1) according to any one of the preceding claims, in which the damping material (7) is at least partially overmolded onto said elastic portion.

7. Anti-vibration support (1) according to claim 6, in which the overmolded damping material (7) has a thickness (e) covering said elastic portion (6; 16), said thickness (e) being less than L / 15, where L is a length of said elastic portion (6; 16) between said first end (6a; 16a) and said second end (6b; 16b).

8. Anti-vibration support (1) according to claim 6 or claim 7, in which the damping material (7) is also overmolded on at least a part of the first frame (2) and / or the second frame (3).

9. Anti-vibration support (1) according to claim 8, wherein said elastic portion (6; 16) comprises a first section (6c; 16c) where the damping material (7) overmolding said elastic portion is integral with the first frame (2), a second section (6d; 16d) where the damping material overmolding said elastic portion is free and a third section (6e; 16e) where the damping material overmolding said elastic portion is integral with the second frame (3), the overmolded damping material (7) having a thickness (e) covering said second section (6d; 16d) of the elastic portion, said thickness (e) being less than L / 30, where L is a length of said elastic portion (6; 16) between said first end (6a; 16a) and said second end (6b; 16b).

10. Anti-vibration support (1) according to any one of the preceding claims, wherein said elastic portion (6; 16) is made of said elastic material.

11. Anti-vibration support (1) according to any one of claims 1 to 9, wherein said elastic portion (26) comprises two blades parallel elastics (27) made of said elastic material, separated by a layer of said damping material (7) which adheres to the two elastic blades (27).

12. Anti-vibration support (1) according to claim 11, wherein said layer of said damping material (7) has a thickness (el) less than L / 30, where L is a length of said elastic portion between said first end and said second end.

13. Vehicle comprising a body (CV), a power unit (M) and at least one anti-vibration support (1) according to any one of the preceding claims connecting the body (CV) to the power unit (M).

14. Vehicle according to claim 13, in which the power unit (M) comprises at least one electric motor.

15. A method of manufacturing an anti-vibration support (1) according to any one of claims 1 to 12, the suspension (4) of which comprises at least one composite part comprising a thermoplastic or thermosetting matrix reinforced with fibers, said fibers being wound between return elements and tensioned, said method comprising the production of a structure of fibers, pre-impregnated or not, through the following operations: - aligning and juxtaposing the fibers, while tensioning them between return elements, and keeping them spaced apart from each other, so as to obtain a first layer, - superimposing on said first layer, a second layer obtained in a manner identical to the first, where the fibers are parallel to those of the first layer, and kept spaced apart from said fibers of the first layer, - repeating the superposition operation until the desired thickness is obtained.

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