Encapsulation device for a vibrating device, such as an air conditioning compressor, comprising an internal skin of elastomer material

Abstract

The present disclosure relates to an encapsulation device (30) comprising shells (31, 32) intended to be assembled together to form an internal volume (35) adapted to receive a vibrating device (20), one of the shells comprising an opening allowing a connector to pass through to connect the vibrating device to equipment located outside the internal volume, in which: - each shell comprises an inner face covered with an internal skin (33, 34) made of elastomer material, said internal skins forming, when the shells are assembled, an internal envelope, said internal envelope surrounding the vibrating device and delimiting the internal volume, at least part of the internal envelope not being in contact with the vibrating device, - at the level of the shell comprising the opening, the internal skin comprises an extension (340) encroaching on a peripheral zone of said opening, said extension being configured to bear on a periphery of the connector.

Description

CONTITECH VIBRATION CONTROL GMBH CONVI.0902- 1 -DescriptionTitle: Encapsulation device for a vibrating device, such as an air conditioning compressor, comprising an internal skin of elastomer materialTechnical field

[0001] The present invention belongs to the field of vibrating devices, and relates more particularly to a device for encapsulating a vibrating device, such as an air conditioning compressor for a motor vehicle.State of the art

[0002] In a motor vehicle, certain devices generate vibrations when in operation. This is particularly the case with the air conditioning compressor, or the power steering pump, etc. These vibrations can cause background noise that can be heard by the occupants of the motor vehicle.

[0003] When the motor vehicle is equipped with a thermal engine, the background noise generated by these vibrations is generally covered by the noise of the thermal engine. However, when the motor vehicle is equipped with an electric motor, the noise generated by these vibrations is much more noticeable.

[0004] These background noises, generated for example by an air conditioning compressor, can reach the passenger compartment of the motor vehicle by two different routes. On the one hand, the vibrations generated by the air conditioning compressor can reach the passenger compartment by solid-borne means, said vibrations being transmitted to a chassis of the motor vehicle via the attachment means of said air conditioning compressor to this chassis. On the other hand, the vibrations generated by the air conditioning compressor can generate acoustic waves that can reach the passenger compartment through the air, by propagation in the air.

[0005] In order to overcome these drawbacks, it is known to filter the vibrations transmitted by solid-borne means. Generally, the air conditioning compressor is attached to a mounting bracket and the mounting bracket is attached to the chassis of the motor vehicle. Elastomer joints are provided between the air conditioning compressor and the mounting bracket, thus ensuring the filtration of vibrations at the connection between the air conditioning compressor and the mounting bracket, which limits the transmission of vibrations by solid-borne means.

[0006] To limit the transmission of vibrations through the air, it is known to encapsulate the air conditioning compressor inside polyurethane foam.

[0007] The air conditioning compressor, encapsulated in polyurethane foam, can optionally be attached to the chassis of the motor vehicle by means of the mounting bracket described above, which makes it possible to limit the transmission of vibrations both by solid-borne and airborne means.

[0008] However, due to the encapsulation in polyurethane foam, in close contact with the air conditioning compressor, the temperature of the air conditioning compressor can increaseCONTITECH VIBRATION CONTROL GMBH CONVI.0902- 2 - sharply and the generated heat is not dissipated.

[0009] In addition, openings must be provided in the polyurethane foam for the passage of connectors, in particular to connect the air conditioning compressor to an electric battery of the motor vehicle. These necessary openings, however, correspond to areas through which vibrations can propagate through the air to the passenger compartment of the motor vehicle.

[0010] Furthermore, the space provided in a motor vehicle to accommodate an air conditioning compressor is generally very limited, and there is therefore a need to make the equipment both more compact and simpler to assemble, making it possible to limit the transmission of vibrations to the passenger compartment (by solid-borne and / or airborne means).

[0011] Prior art solutions, in that they include several parts to be assembled and a generally thick polyurethane foam, can be both difficult to assemble and to make more compact.Description of the invention

[0012] The present disclosure aims to remedy all or part of the limitations of the solutions from the prior art, in particular those set out above, by proposing a solution which makes it possible in particular to improve thermal diffusion while limiting the transmission by air of the vibrations generated by a vibrating device.

[0013] Furthermore, the present disclosure aims to propose a solution allowing, in certain embodiments at least, the integration of a vibrating device in a simple and compact manner into a motor vehicle.

[0014] To this end, it proposes according to a first aspect an encapsulation device comprising shells intended to be assembled together to form an internal volume adapted to receive a vibrating device, one of the shells of said encapsulation device comprising an opening allowing a connector to pass through to connect the vibrating device to equipment located outside the internal volume of said encapsulation device, in which: each shell has an inner face covered with an internal skin made of elastomer material, said internal skins forming, when the shells are assembled, an internal envelope made of elastomer material, said internal envelope surrounding the vibrating device and delimiting the internal volume, at least part of the internal envelope not being in contact with the vibrating device, at the level of the shell comprising the opening, the internal skin comprises an extension encroaching on a peripheral zone of said opening, the extension delimiting a passage in the opening of dimensions smaller than the dimensions of the opening, said extension being configured to bear on a periphery of the connector.

[0015] Thus, the internal envelope made of elastomer material, which surrounds the vibrating device inside the shells assembled together, makes it possible to limit the transmission by air (and possibly solid-borne means) of the vibrations generated by the vibrating device. In addition, thisCONTITECH VIBRATION CONTROL GMBH CONVI.0902- 3 - internal envelope extends at the opening to rest on the perimeter of the connector, which improves the acoustic sealing of the opening, and therefore limits the transmission of vibrations by air via the opening.

[0016] With this internal envelope not being in contact with the vibrating device, at least in part, the air can circulate in the internal volume around said vibrating device, which makes it possible to improve thermal diffusion.

[0017] Furthermore, the use of an elastomer material allows, if necessary, to have lower thicknesses than with a polyurethane foam, which allows, if necessary, to have a more compact encapsulation device than in the solutions from the prior art.

[0018] In preferred embodiments, the encapsulation device may further comprise one or more of the following optional features, individually or in any technically possible combination.

[0019] In preferred embodiments, the extension has a peripheral sealing lip.

[0020] In preferred embodiments, one of the shells includes internal attachment units at which the vibrating device is attached within the encapsulation device.

[0021] In preferred embodiments, the internal attachment units correspond to elastomer joints.

[0022] In preferred embodiments, one of the shells comprises external attachment units at which the encapsulation device is attached in a motor vehicle.

[0023] In preferred embodiments, the external attachment units correspond to elastomer joints.

[0024] In preferred embodiments, the surface of the internal envelope, located opposite the vibrating device, comprises hollows and / or protuberances.

[0025] In preferred embodiments, the shells comprise respective peripheral contact surfaces, in contact with each other when the shells are assembled together, and in which the inner skin of one of the shells covers the peripheral contact surface of this shell.

[0026] In preferred embodiments, the shells are assembled together by a clipping system.

[0027] According to a second aspect, there is provided a vibrating system comprising an encapsulation device according to any one of the embodiments of the present disclosure, and a vibrating device arranged inside the internal volume formed by the shells, assembled together, of said encapsulation device.

[0028] In preferred embodiments of the vibrating system, the vibrating device corresponds to an air conditioning compressor.

[0029] According to a third aspect, there is provided a motor vehicle comprising a vibrating system according to any one of the embodiments of the present disclosure, said vibrating system being attached to a chassis of said motor vehicle.Presentation of figures

[0030] The invention will be better understood by reading the following description, given as a non-limiting example, and made with reference to the figures which represent:CONTITECH VIBRATION CONTROL GMBH CONVI.0902- 4 -[Fig. 1] Figure 1: an exploded view of an exemplary the embodiment of a vibrating system, [Fig. 2] Figure 2: perspective views of a first shell and a second shell of an exemplary embodiment of an encapsulation device,[Fig- 3] Figure 3: a top view of the second shell of figure 2,[Fig. 4] Figure 4: a sectional view of the vibrating system of Figure 1 according to a first section plane,[Fig. 5] Figure 5: a sectional view of the vibrating system of Figure 1 according to a second sectional plane,[Fig. 6] Figure 6: a partial sectional view of the vibrating system at an opening for the passage of a connector,[Fig. 7] Figure 7: a perspective view of the first shell of Figure 2, showing internal and external attachment units of the encapsulation device,[Fig. 8] Figure 8: a perspective view of an internal attachment unit, [Fig. 9] Figure 9: a perspective view of an external attachment unit, [Fig. 10] Figure 10: perspective views of exemplaiy embodiments of internal skins with acoustic treatment.

[0031] In these figures, identical references from one figure to another designate identical or similar elements. For clarity, items depicted are not to scale unless otherwise stated.Description of the embodiments

[0032] Figure 1 schematically represents an exploded view of a non-limiting exemplaiy embodiment of a vibrating system 10.

[0033] As illustrated in Figure 1, the vibrating system 10 comprises a vibrating device 20. The vibrating device 20 is preferably a vibrating device intended to be mounted in a motor vehicle. For example, the vibrating device 20 corresponds to an air conditioning compressor, a power steering pump, etc.

[0034] As illustrated in Figure 1, the vibrating system 10 further comprises an encapsulation device 30. Generally, the encapsulation device 30 comprises at least two shells intended to be assembled together to form an internal volume 35 adapted to receive the vibrating device 20. In the remainder of the description, and as illustrated by Figure 1, the case where the encapsulation device 30 comprises two shells is considered in a non-limiting manner. However, nothing excludes, following other exemplary embodiments, having a number of shells greater than two.

[0035] As illustrated in Figure 1, the encapsulation device 30 comprises a first shell 31 and a second shell 32.

[0036] The encapsulation device 30 is for example intended to be mounted so that the second shell 32 is arranged above the first shell 31 in the motor vehicle, so that it is conventionally considered that the second shell 32 is on the top side of the encapsulation device 30 and that theCONTITECH VIBRATION CONTROL GMBH CONVI.0902- 5 - first shell 31 is on the bottom side of the encapsulation device 30.

[0037] The first shell 31 and the second shell 32 are for example made of thermoplastic material, reinforced or not reinforced.

[0038] As indicated above, the first shell 31 and the second shell 32, when assembled together, form an internal volume 35 in which the vibrating device 20 is arranged. The internal volume 35 thus formed is essentially closed, with the exception of one or more openings 320 provided in particular to allow the vibrating device 20, enclosed inside the encapsulation device 30, to be connected to other equipment located outside said encapsulation device 30. The at least one opening 320 is for example used to supply the vibrating device 20 with electrical energy, to allow equipment located outside the encapsulation device 30 to control said vibrating device 20 and / or to monitor the operation of said vibrating device 20, to pass a cooling liquid to and / or from the vibrating device 20, etc.

[0039] Figure 2 schematically represents perspective views of exemplary embodiments of the first shell 31 and the second shell 32. More particularly, part a) of Figure 2 represents an exemplary embodiment of the first shell 31 and part b) represents an exemplary embodiment of the second shell 32.

[0040] In the non-limiting example illustrated by part b) of Figure 2, the second shell 32 comprises several openings 320 allowing connectors to pass through, intended to connect the vibrating device 20 to equipment located outside the internal volume 35 of said encapsulation device 30. It should however be noted that it is also possible, according to other examples, to provide openings for the passage of connectors only on the first shell 31, or on both the first shell 31 and the second shell 32. It is also possible, according to other examples, to provide a single opening 320 in the encapsulation device 30 for the passage of connectors, on the first shell 31 or the second shell 32.

[0041] In the non-limiting example illustrated by part a) of Figure 2, the first shell 31 comprises internal attachment holes 310 intended to accommodate internal attachment units 36 at which the vibrating device 20 is attached inside the encapsulation device 30. The first shell 31 also comprises in this example external attachment holes 311 intended to accommodate external attachment units 37 at which the encapsulation device 30 is attached in a motor vehicle. It should be noted that it is also possible, according to other examples, to attach the vibrating device 20 to the encapsulation device 30 without having internal attachment holes 310 provided for this purpose and / or to attach the encapsulation device 30 to the motor vehicle without having external attachment holes 311 provided for this purpose.

[0042] As illustrated in Figure 2, the inner face of the first shell 31, that is the face of the first shell 31 intended to be opposite the vibrating device 20 in the internal volume 35, is entirely covered with a first internal skin 33 made of elastomer material. The elastomer material formingCONTITECH VIBRATION CONTROL GMBH CONVI.0902- 6 - the first internal skin 33 is, for example, natural or synthetic rubber, silicone, a thermoplastic elastomer, etc. The first internal skin 33 maybe solid or porous (for example, made of elastomer foam). For example, the first internal skin 33 is produced by direct injection onto the inner face of the first shell 31. Generally speaking, a solid first internal skin 33 will have a lower thickness than a porous first internal skin 33, with a constant quantity (mass) of elastomer material.

[0043] Similarly, the inner face of the second shell 32, that is the face of the second shell 32 intended to be opposite the vibrating device 20 in the internal volume 35, is entirely covered with a second internal skin 34 made of elastomer material. The elastomer material forming the second internal skin 34 is, for example, natural or synthetic rubber, silicone, a thermoplastic elastomer, etc. The second internal skin 34 may be solid or porous (for example, made of elastomer foam). For example, the second internal skin 34 is produced by direct injection onto the inner face of the second shell 32. Generally speaking, a solid second internal skin 34 will have a lower thickness than a porous second internal skin 34, with a constant quantity (mass) of elastomer material. In preferred embodiments, the first internal skin 33 and the second internal skin 34 are made of the same elastomer material and / or have the same characteristics in terms of porosity (solid or porous).

[0044] When the first shell 31 and the second shell 32 are assembled together, the first internal skin 33 and the second internal skin 34 join together and form an internal envelope made of elastomer material, without interruption at the contact zones between the first shell 31 and the second shell 32 in that the first internal skin 33 and the second internal skin 34 are also in contact with each other at said contact zones. The internal envelope surrounds the vibrating device 20 and thus delimits the internal volume 35 intended to accommodate said vibrating device 20. It should be noted that the internal envelope completely surrounds the vibrating device 20 installed inside the encapsulation device 30 except at each opening 320 provided for passing a connector, at which a passage for the connector is advantageously provided in the internal envelope. When the encapsulation device 30 comprises an internal attachment hole 310, as illustrated by part a) of Figure 2, said internal envelope may cover all or part of this internal attachment hole 310, or the internal envelope may be interrupted at this internal attachment hole 310.

[0045] Figures 4 and 5 schematically illustrate representations of sections of the vibrating system 10 in different respective section planes A-A and B-B, visible in Figure 3. The section planes A-A and B-B considered are orthogonal to each other, and both intersect an opening 320 of the second shell 32.

[0046] As illustrated by Figures 4 and 5, the first inner skin 33 and the second inner skin 34 are configured such that the inner envelope is not in contact, at least in part, with the vibrating device 20. In other words, the dimensions of the internal volume 35, delimited by the internal envelope, are greater than those of the vibrating device 20. Thus, air can circulate in the internal volume 35CONTITECH VIBRATION CONTROL GMBH CONVI.0902- 7 - around said vibrating device, which makes it possible to improve thermal diffusion. In preferred embodiments, the first inner skin 33 and the second inner skin 34 are configured such that there is no contact between the inner envelope and the vibrating device 20, except possibly in areas where the vibrating device 20 is mechanically attached to the encapsulating device 30, for example via internal attachment units 36.

[0047] As illustrated by Figures 4 and 5, the second internal skin 34 comprises an extension 340 encroaching on a peripheral zone of the opening 320 of the second shell 32. Thus, the extension 340 of the second internal skin 34 delimits a passage in the opening 320 which has dimensions smaller than the dimensions of the opening 320. Furthermore, the extension 340 is configured to bear on a periphery of the connector (not shown in Figures 4 and 5) passing through the opening 320, that is the extension 340 is configured so that the dimensions of the passage that it delimits are less than the dimensions of the section of the connector (not shown in Figures 4 and 5). Figure 6 represents a partial sectional view of the vibrating system 10 in the plane A-A, at an opening 320 crossed by a connector 21. As illustrated in Figure 6, the extension 340 of the second internal skin rests on the entire periphery of the connector 21. Such arrangements make it possible to improve the acoustic sealing of the opening 320, and such an extension 340 is preferably provided at each opening 320 allowing a connector to pass through.

[0048] In the non-limiting example illustrated by Figures 4, 5 and 6, the extension 340 is in the form of a peripheral sealing lip (lip seal). In the example illustrated by Figures 4, 5 and 6, the extension 340 comprises a single peripheral sealing lip, but it is also possible to have several peripheral sealing lips, in order to improve the acoustic sealing at the opening 320.

[0049] As indicated above, the first shell 31 and the second shell 32 have contact zones, which are typically in the form of respective peripheral contact surfaces that are complementary to each other.

[0050] In the non-limiting example illustrated by Figures 4 and 5, the peripheral contact surface of the first shell 31 comprises a peripheral bead 312, which complementarily disappears into a corresponding peripheral housing 321 of the peripheral contact surface of the second shell 32. Such arrangements make it possible to limit the lateral movements of the first shell 31 relative to the second shell 32, while improving the acoustic seal at the contact zone.

[0051] In preferred embodiments, the inner skin of at least one of the shells, among the first shell 31 and the second shell 32, covers the entire peripheral contact surface of this shell. Such arrangements make it possible to improve the acoustic seal at the contact zone between the first shell 31 and the second shell 32. In the non-limiting example illustrated by Figures 4 and 5, it is the first internal skin 33 which covers the peripheral contact surface of the first shell 31 (reference 330 in Figure 5).

[0052] In preferred embodiments, and as illustrated by Figures 1, 2 and 3, the first shell 31 andCONTITECH VIBRATION CONTROL GMBH CONVI.0902- 8 - the second shell 32 are for example assembled together by a clipping system 38. Generally, any assembly system making it possible to keep the first shell 31 and the second shell 32 assembled together can be used, and the choice of a particular assembly system corresponds to a non-limiting alternative embodiment of the present disclosure.

[0053] Figure 6 represents a perspective view of the first shell 31, the inner face of which is covered by the first internal skin 33. As illustrated in Figure 6, the first shell 31 has internal attachment units 36 arranged in the internal attachment holes 310. Furthermore, the first shell 31 comprises external attachment units 37 arranged in the external attachment holes 311. In the non-limiting example illustrated by Figure 6, the first shell 31 comprises four arranged internal attachment units 36 and three external attachment units 37. Generally, it is possible to have a different number of internal attachment units 36 and / or external attachment units 37. Furthermore, in the non-limiting example illustrated by Figure 6, the attachment units (internal 36 or external 37) are all arranged on the first shell 31. However, nothing excludes, according to other examples, having attachment units (internal 36 or external 37) only on the second shell 32, or on both the first shell 31 and the second shell 32. For example, it is possible in some cases to have external attachment units 37 only on the first shell 31 and internal attachment units 36 only on the second shell 31.

[0054] Generally, any attachment system may be used for an internal attachment unit 36 or an external attachment unit 37, and the choice of a particular attachment system corresponds to a non-limiting alternative embodiment of the present disclosure.

[0055] In preferred embodiments, the internal attachment units 36 and / or the external attachment units 37 correspond to elastomer joints. Such arrangements are advantageous in that the elastomer joints make it possible to filter vibrations propagating by solid-borne means from the vibrating device 20 to the passenger compartment of the motor vehicle. In the case where the internal attachment units 36 and the external attachment units 37 are elastomer joints, the encapsulation device 30 therefore introduces two successive levels of filtering for vibrations propagating by solid-borne means:A first filtering stage between the vibrating device 20 and the encapsulation device 30, and A second filtering stage between the encapsulation device 30 and the motor vehicle.

[0056] Figure 8 schematically represents an exemplary embodiment of an internal attachment unit 36 of the elastomer joint type. As illustrated in Figure 8, the internal attachment unit 36 comprises a central part 360, the general shape of which corresponds to a hollow cylinder, intended to be attached to the vibrating device 20, for example by a screw / nut assembly. The central part 360 is for example made of steel, aluminium, etc. The central part 360 is surrounded by an outer part 361, made of elastomer material, the general shape of which also corresponds to a hollow cylinder whose internal diameter corresponds to the external diameter of the central partCONTITECH VIBRATION CONTROL GMBH CONVI.0902- 9 -360. The outer part 361 is for example made of natural or synthetic rubber, silicone, thermoplastic elastomer, etc. In this example, the outer part 361 is intended to be attached inside an internal attachment hole 310.

[0057] Figure 9 schematically represents an exemplary embodiment of an external attachment unit 37 of the elastomer joint type. As illustrated in Figure 9, the external attachment unit 37 comprises a central part 370, the general shape of which corresponds to a hollow cylinder, intended to attach the vibrating system 10 in a motor vehicle, for example by a screw / nut assembly. The central part 370 is for example made of steel, aluminium, etc. The central part 370 is surrounded by an intermediate part 371, made of elastomer material, the general shape of which also corresponds to a hollow cylinder whose internal diameter corresponds to the external diameter of the central part 370. The intermediate part 371 is for example made of natural or synthetic rubber, silicone, thermoplastic elastomer, etc. The intermediate part 371 is surrounded by an outer part 372, the general shape of which also corresponds to a hollow cylinder whose internal diameter corresponds to the external diameter of the intermediate part 371. The outer part 372 is for example made of steel, aluminium, thermoplastic material, etc. In this example, the outer part 372 is intended to be attached inside an external attachment hole 311.

[0058] It should be noted that the vibrating system 10, via external attachment units 37, can be attached directly (without intermediate equipment such as a mounting bracket) or indirectly (via intermediate equipment) to the chassis of the motor vehicle. In preferred embodiments, the vibrating system 10 is attached directly to the chassis of the motor vehicle. Such arrangements make it possible to facilitate the installation of the vibrating system 10 and to reduce the volume required to install said vibrating system 10 in the motor vehicle. Furthermore, compared to the prior art, the elimination of the mounting bracket (integrated in the encapsulation device 30) also makes it possible to eliminate the natural vibration modes of said mounting bracket, and therefore to reduce the transmission of vibrations by solid-borne means from the vibrating device 20 to the motor vehicle.

[0059] In preferred embodiments, the surface of at least one of the inner skins, among the first inner skin 33 and the second inner skin 34, located opposite the vibrating device 30 in the assembled vibrating system 10, comprises hollows and / or protuberances. It should be noted that such hollows and / or protrusions may also be provided on both the first inner skin 33 and the second inner skin 34. The hollows and / or protrusions formed on the surface of an internal skin correspond to an acoustic treatment of said internal skin, aimed at improving the attenuation of vibrations transmitted by air. Indeed, such hollows and / or protuberances make it possible to diffusely reflect the incident acoustic waves, in the manner of an anechoic surface, which tends to trap these acoustic waves inside the internal volume 35 and limit the transmission of vibrations by air from the vibrating device 20 to the motor vehicle.CONTITECH VIBRATION CONTROL GMBH CONVI.0902- 10 -

[0060] Figure 10 shows non-limiting examples of hollows and / or protrusions formed on the surface of the first internal skin 33. In the example illustrated by part a) of Figure 10, the first internal skin 33 comprises hollows substantially circular and oblong in shape, arranged in a regular pattern. In the example illustrated by part b) of Figure 10, the first internal skin 33 comprises protuberances framing substantially flat (non-hollow) parts substantially circular and oblong in shape, arranged in a regular pattern. In the example illustrated by part c) of Figure 10, the first internal skin 33 comprises protuberances framing hollows substantially circular and oblong in shape, arranged in a regular pattern. In the example illustrated by part d) of Figure 10, the first internal skin 33 comprises protuberances which correspond to lips parallel to each other (and with the axis A-A of Figure 3), for example in a wavy shape.

[0061] Generally, any shape of hollow and / or protuberances allowing the diffuse reflection of incident acoustic waves can be used, and the choice of a particular shape constitutes only a nonlimiting alternative embodiment of the present disclosure.

[0062] More generally, it should be noted that the embodiments of the encapsulation device 30 considered above have been described as non-limiting examples, and that other variants are consequently conceivable.

Claims

CONTITECH VIBRATION CONTROL GMBH CONVI.0902- 11 -Claims1. Encapsulation device (30) comprising shells (31, 32) intended to be assembled together to form an internal volume (35) adapted to receive a vibrating device, one of the shells of said encapsulation device comprising an opening allowing a connector to pass through to connect the vibrating device to equipment located outside the internal volume of said encapsulation device, characterized in that: each shell comprises an inner face covered with an internal skin (33, 34) made of elastomer material, said internal skins forming, when the shells are assembled, an internal envelope made of elastomer material, said internal envelope surrounding the vibrating device and delimiting the internal volume, at least part of the internal envelope not being in contact with the vibrating device, at the level of the shell comprising the opening, the internal skin comprises an extension (340) encroaching on a peripheral zone of said opening, the extension delimiting a passage in the opening of dimensions smaller than the dimensions of the opening, said extension being configured to bear on a perimeter of the connector.

2. The encapsulation device (30) according to claim 1, wherein the extension comprises a peripheral sealing lip.

3. The encapsulation device (30) according to any preceding claim, wherein one of the shells comprises internal attachment units at which the vibrating device is attached within the encapsulation device.

4. The encapsulation device (30) according to claim 3, wherein the internal attachment units correspond to elastomer joints.

5. The encapsulation device (30) according to any preceding claim, wherein one of the shells comprises external attachment units at which the encapsulation device is attached in a motor vehicle.

6. The encapsulation device (30) according to claim 5, wherein the external attachment units correspond to elastomer joints.

7. The encapsulation device (30) according to any preceding claim, in which the surface of one of the internal skins, located opposite the vibrating device, comprises hollows and / or protuberances.

8. The encapsulation device (30) according to any preceding claim, wherein the shells comprise respective peripheral contact surfaces, in contact with each other when the shells are assembled together, and wherein the inner skin of one of the shells covers the peripheral contact surface of that shell.

9. The encapsulation device (30) according to any one of the preceding claims, in which the shells are assembled together by a clipping system.CONTITECH VIBRATION CONTROL GMBH CONVI.0902- 12 -10. Vibrating system comprising an encapsulation device (30) according to any one of the preceding claims and a vibrating device arranged inside the internal volume formed by the shells, assembled together, of said encapsulation device.

11. The vibrating system according to claim 10, wherein the vibrating device corresponds to an air conditioning compressor.

12. Motor vehicle comprising a vibrating system according to any one of claims 10 to 11, said vibrating system being attached to a chassis of said motor vehicle.

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