FR3086232A1 - SLEEVE FOR THE PASSAGE OF A WIRE HARNESS THROUGH A PARTITION, IN PARTICULAR A MOTOR VEHICLE APRON. - Google Patents

Abstract

The invention relates to a device for passing a bundle of electrical cables (2) through an opening (7) formed through a partition (3). The device comprises an axially extended sleeve (1a) (A1), the recess of which provides a passage for the passage of the cable bundle through it. The sleeve (1a) comprises a barrel (5) provided at its respective axial ends with a sealing lip (6a) and an acoustic insulation lip (6b) each arranged in an elastically deformable flared skirt. At least any one of the lips (6b) is provided with a plurality of gripping members (10a) of the lip (6b) which are angularly distributed near its periphery, successively providing passages for receiving a removable link (11) for radial tightening of said at least one lip (6b).

Description

Sleeve for passing a bundle of cables through a partition, in particular a motor vehicle bulkhead.

The present invention relates to devices used for the passage of electric cables through a partition. The invention relates more particularly to such a device arranged as a passage sleeve through a bundle of cables, by providing a seal between the sleeve and an opening for passage of the sleeve through the partition. An application of the invention relates in particular to the automotive field and relates more specifically to the devices used for the passage of a bundle of cables through an apron of separation between an engine compartment and a passenger compartment of a motor vehicle.

Motor vehicles include a body on which various equipment and / or accessories for the vehicle are installed. The body provides an engine compartment adjoining the passenger compartment of the vehicle, which are separated from each other by a partition called an apron. The engine compartment houses the organs involved in motorizing the vehicle and / or various equipment, including at least one source of electrical energy.

The apron is commonly formed from a sheet whose face facing the passenger compartment is provided with a layer of an acoustic insulation material, itself covered by a lining. This protects passengers installed inside the passenger compartment from noise from the engine compartment. The electric power source is used to supply electricity to various equipment and / or accessories of the vehicle which are installed outside the engine compartment. Information exchanges can also be provided between on the one hand equipment and / or accessories installed in the engine compartment, and on the other hand equipment and / or accessories installed outside the engine compartment.

As a result, at least one bundle of cables connects on the one hand one or more pieces of equipment and / or accessories placed inside the engine compartment, and on the other hand one or more pieces of equipment and / or accessories placed on the vehicle at the outside the engine compartment. Such a bundle of cables makes it possible, for example, to route electrical energy and / or control signals from the engine compartment to equipment and / or accessories of the vehicle located outside the engine compartment.

To allow a bundle of cables to extend between the engine compartment and the passenger compartment, the bulkhead has at least one opening for the passage of the bundle of cables through it. However, moisture is likely to enter from the engine compartment into the passenger compartment through the opening, which is to be avoided. In addition, the opening allows the passage of sound waves to the detriment of the acoustic insulation of the passenger compartment.

This is why it is common to interpose a sleeve between the cable bundle and the opening made through the bulkhead, as shown for example from document FR2781096-A1 (AUTOMOBILES PEUGEOT SA). The sleeve encircles the bundle of cables and comprises at its ends flexible lips bearing against the faces of the bulkhead respectively oriented towards the engine compartment and towards the passenger compartment. The lip bearing against the face of the bulkhead facing the engine compartment is a sealing lip, being understood with respect to humidity, and the lip bearing against the face of the bulkhead facing the passenger compartment is a sound insulation lip.

In this context, the lips are of a diametrical dimension greater than that of the opening. Therefore, difficulties arise for the installation of the sleeve through the apron, one or the other of the lips obstructing the passage of the sleeve in the opening. A force introduction of one of the lips through the opening makes the operation of translating the sleeve through the opening difficult to perform by an operator, and risks injuring the lip.

For example, according to methods of mounting the sleeve through the apron, it is more convenient for an operator to introduce the sleeve into the opening from the engine compartment to the passenger compartment. It appears that the acoustic insulation lip obstructs the passage of the sheath through the opening. To force its passage through the opening, it is then necessary to exert axial traction and / or thrust on the sleeve, but such operations are difficult to perform due to the strength of the lip.

To overcome these difficulties, the document FR2781096-A1 proposes to arrange the acoustic insulation lip in an elastically deformable flared skirt. During the installation of the sleeve through the opening, the acoustic insulation lip is folded down to allow its passage through the opening towards the passenger compartment. However, it has become apparent from use that the implementation of such a solution deserves to be improved.

In this context, the present invention relates to a device for the passage of a bundle of electric cables through a partition, in particular a motor vehicle bulkhead separating an engine compartment and a passenger compartment of the vehicle. The invention also relates to a method of installation through a said partition of a device according to the invention.

The device of the invention comprises a sleeve for crossing the partition which is provided at each of its ends with elastically deformable skirts respectively forming a sealing lip for taking the support of the sleeve against one of the faces of the partition and an acoustic insulation lip for supporting the sleeve against the other of the faces of the partition.

An object of the invention is to provide such a device for introducing the sleeve through an opening that the partition includes, taking account of the dimensions of the lips which are significantly greater than the dimension of the opening.

It is in particular intended by the invention to propose such a device, the installation of which through the opening is quick and easy to carry out by an operator.

Another object of the invention is to propose a solution at lower costs, by simplifying as best as possible the structure of the device, its methods of obtaining, and / or its methods of installation through the partition. Such research is particularly in the context of notoriously severe economic competition in the automotive field, which can make a potential solution prohibitive due to the costs involved.

The aims of the present invention are achieved individually or in combination by applying the following provisions.

The device of the invention is a device for passing a bundle of electric cables through an opening made through a partition. The device comprises an axially extended sleeve, the recess of which provides a passage for the passage of the cable bundle through it. The sleeve comprises a barrel provided at its respective axial ends with a sealing lip and an acoustic insulation lip each arranged in an elastically deformable flared skirt.

In this context, the invention is recognizable in that at least any one of the lips is provided with a plurality of lip gripping members which are angularly distributed close to its periphery, by successively providing passages for receiving a removable radial tightening link of said at least one lip. Radial tightening of the lip by the link makes it possible to temporarily reduce its diametrical extension, to allow its easy introduction through the opening, and this without risk of injuring it. Then removal of the link authorizes an axial application of the lip against the partition. The axial tightening of the lip being broken, an elastic deformation of the lip causes its axial application against the partition.

More particularly at the outlet of the sleeve manufacturing workshop, an operator can easily install the link on the lip and cause the radial tightening of the lip via the link until reducing its extension to a set diameter, then close the link in loop on itself via its ends joined to each other. The nominal diameter is less than the diameter of the opening through which the sleeve is intended to be introduced axially for its installation on the partition. The sleeve is then awaiting use.

At a site where the sleeve is installed on the partition, an operator can then easily thread the sleeve through the opening via its end provided with the lip enclosed by the link, then remove the link by detaching its linked ends one by one. the other and by withdrawing it from the seizure organs. The withdrawal of the link then causes the elastic deployment of the lip in axial application against the partition.

The installation of the sleeve on the partition is quick and easy to carry out by an operator, starting from a simple and inexpensive arrangement of the lip which is easy to implement. The arrangement of the lip resides in particular in the formation of the gripping members angularly distributed over the lip along a director defined by its perimeter, preferably as close as possible to its periphery. The gripping members thus provide successive passages capable of collectively receiving the link while awaiting the use of the sleeve.

It is understood that at least any one of the lips is capable of being provided with said gripping members, in the axial direction of introduction of the sleeve through the opening. For example, only the acoustic insulation lip or only the sealing lip can be provided with said gripping members in a set direction of mounting of the sleeve through the partition. For example again, the two lips can both be provided with said gripping members, so that the sleeve can be installed on the partition in one or the other of its opposite directions of axial extension.

According to an advantageous embodiment, the gripping members are integrated into the lip which is in particular derived from a flexible resin, such as a natural or synthetic elastomer. Various modes of integration of the gripping members with the lip can be implemented at lower cost.

For example, the gripping members are integrated into the lip either by cutting out the material constituting the lip, or by being derived from the material constituting the lip, or by sealing.

The gripping members are in plurality by being angularly distributed over the lip according to its peripheral extension, such as in particular along its circumference in the current case where the lip is of frustoconical conformation. It is understood here that the diametrical dimension of peripheral extension of the lip can indifferently be constant from the axis of the sleeve or be variable by presenting a conformation of generally polygonal architecture in a plane perpendicular to the axis of the sleeve.

As an indication, the number of seizure bodies is between three and twelve. In one case relating to the installation of the sleeve through an apron of a motor vehicle separating an engine compartment from a passenger compartment of the vehicle, the number of gripping members is eight, plus or minus two gripping members. It is understood here that the gripping members are in plurality in variable number according to the geometric configuration and / or the diametrical dimension of the lip.

The plurality of gripping members gives them their ability to cooperate collectively with the link, by successive passage of the link from one to the other of the gripping members to allow the radial tightening of the lip as a result of traction exerted on the link by an operator via its ends, prior to the loop closing of the link on itself by joining its ends to one another. The arrangements for loop closure of the link on itself are easily reversible to give the link its removable nature on the lip.

Different embodiments of the gripping members can be structurally simple and easy to implement at lower costs. For example, the gripping members are each formed indifferently from an orifice formed through the lip, or from a hook projecting from the lip to an inner face of the lip via which the lip bears axially against the partition.

Different variants of the link can also be structurally simple and easy to implement at lower cost. For example, the link is formed indifferently of a string closed in a loop on itself via a reversible link knot between its ends, such as a knot with at least one loop for example, or of a semi-rigid wire closed in loop on itself by reversible twist from its ends to one another, or an irreversible clamp from its ends to each other capable of being broken by means of a cutting tool.

According to one embodiment, the lip is joined to the barrel via a zone of weakening of the lip providing a hinge for articulation between the lip and the barrel. This promotes the elastic deformation of the lip from its deployed station towards its radial tightening station by the link, and inversely spontaneously from its radial tightening station by the link towards its deployed station as a result of the withdrawal of the link.

Preferably, the sleeve is provided with at least one plating member forcing an elastic axial support grip of any at least one of the lips against the partition. The plating member is notably assigned at least to the sealing lip to reinforce the sealing obtained after installation of the sleeve on the partition.

The invention also relates to a method of installation through a partition of a sleeve participating in a device according to the invention.

According to the invention, the method comprises at least the following operations carried out by an operator:

-) Prior to the introduction of the sleeve through the opening made through the partition, set up the link on the lip by successively placing it in engagement on said gripping members. Then apply a tightening of the link causing a radial deformation of the lip until a diametrical dimension of the lip is less than that of the opening, and immobilize the link in a reversible manner on itself in the tightening position. radial of the lip. The sleeve is then in the standby station for its use.

-) then on the installation site of the sleeve on the partition, introduce the sleeve through the opening via the end of the barrel provided with the lip clamped by the link. Then remove the link from the lip by breaking its reversible immobilization on itself, to allow the elastic deployment of the lip against the partition.

More specifically according to one embodiment and as a result of the tightening of the lip by the link, the lip is folded down towards the axis of extension of the sleeve while being oriented in extension of the barrel substantially axially towards the outside of the sleeve. It is understood here that the lip folded towards the axis of extension of the sleeve is disposed in axial extension of the barrel, being potentially more or less inclined relative to the axis of the sleeve.

The invention also relates to a motor vehicle recognizable in that it is equipped with at least one sleeve participating in a device according to the invention. Said at least one sleeve passes through a partition of the vehicle and the link is removed from said at least one lip provided with said gripping members, which is applied axially against the partition. It is understood here that the absence of a link does not preclude the identification of a vehicle of the invention, since at least one of the lips that includes said at least one sleeve in the crossing station of the partition is identifiable by its ability to receive the link via the input devices with which said at least one lip is provided.

More particularly according to one embodiment, said at least one sleeve is installed on an apron forming a said partition between an engine compartment and a passenger compartment of the vehicle. Preferably, said at least one lip provided with said gripping members is the acoustic insulation lip.

Indeed, the invention responds particularly satisfactorily to the difficulties of installing a said sleeve on said deck. According to the successive operations of mounting the accessories and / or equipment of the vehicle on an assembly line, it is in fact easier to introduce the sleeve through the bulkhead from the engine compartment, in particular before it is encumbered by vehicle equipment including including its engine. In addition, the sealing lip being preferably provided with a said plating member against the partition, said plate member may prevent satisfactory radial tightening of the sealing lip. It is therefore appropriate to apply the invention to the acoustic insulation lip which is then provided with said gripping members.

Examples of embodiments of the present invention will be described in relation to the figures of the appended plates, in which:

-) Figure 1 is a perspective illustration of a sleeve from the prior art, which is used for the passage of a bundle of cables through a partition and to which the present invention is for example applicable.

-) FIG. 2 is composed of two diagrams (a) and (b), successively illustrating in axial half-section the methods of preparation of a sleeve participating in a device according to the invention according to a first embodiment example, prior to its installation through a partition.

-) Figure 3 and Figure 4 are perspective illustrations respectively in end view and in axial view, of the sleeve shown in Figure 2 at a stage of its shaping illustrated in the diagram (b).

-) Figure 5 is a schematic illustration in axial half-section of a second embodiment of a sleeve participating in a device according to the invention, which is in the installation position through a partition.

-) FIG. 6 is composed of two diagrams (c) and (d), successively illustrating in axial half-section the installation methods through a partition of the sleeve shown in FIGS. 2 to 4.

The figures and their detailed descriptions show the invention according to particular methods which are not restrictive as to the scope of the invention as defined by the claims. The figures and their detailed descriptions of exemplary embodiments of the invention can be used to better define it, if necessary in relation to the general description which has just been made.

In FIG. 1 on the one hand and in FIGS. 2 to 6 on the other hand, sleeves 101 and 1 a, 1 b made of elastomer of axial extension A1, are configured to allow the extension of a bundle of cables 2 electric (figure 1) through a partition 3 (figures 5 and 6). According to a particularly useful application of the invention, the partition 3 provides in particular a bulkhead between a motor compartment 4a and a passenger compartment 4b of a motor vehicle.

The sleeve 101 shown in Figure 1 is part of the prior art. The sleeves 1a, 1b respectively shown on the one hand in Figures 2 to 4 and Figure 6 and on the other hand in Figure 5, fall under respective embodiments of the present invention.

The sleeves 101, 1a, 1b essentially comprise a barrel 105, 5 axially median provided at its respective axial ends with lips 106a, 106b, 6a, 6b made of elastomer. The lips 106a, 106b, 6a, 6b are in particular shaped as flared skirts or in other words as skirts of generally frustoconical conformation. Such sleeves 101, 1a, 1b are configured to be installed through the partition 3, by being introduced by translation into an opening 7 that comprises the partition 3 as illustrated in FIG. 5 and in the diagrams in FIG. 6.

The peripheral edges 108a, 108b and 8a, 8b of the lips 106a, 106b, 6a, 6b are intended to bear respectively axially against the opposite faces 3a, 3b of the partition 3. A first lip is configured as a sealing lip 106a, 6a vis-à-vis moisture infiltration through the opening 7. A second lip 106b, 6b is configured as an acoustic insulation lip 106b, 6b obstructing the passage of sound waves through the opening 7.

In Figures 5 and 6, the partition 3 is in particular formed of a said deck. The sealing lip 6a is intended to be pressed against the face of the partition 3 facing the engine compartment 4a and the acoustic insulation lip 6b is intended to be pressed against the face of the partition 3 facing the cockpit 4b. Preferably, the sleeves 1a, 1b are provided with a device 9 for plating the sealing lip 6a against the partition 3, to promote its application against the partition 3 and consequently reinforce the sealing obtained.

The partition 3 formed of a said apron comprises a sheet 3a disposed on the side of the engine compartment 4a. Successively on the side of the partition 3 oriented towards the living space 4b, the sheet 3a is coated with a layer 3b of acoustic insulation material, itself covered by a lining 3c forming an interior lining of the passenger compartment 4b. The sealing lip 6a thus axially bears against the sheet 3a and the acoustic insulation lip 6b thus bears axially against the lining 3c.

To allow the axial plating of the lips 6a, 6b against the partition 3, the diametrical dimensions D1a, D1b of their periphery are greater than the diametrical dimension D2 of the opening 7. This therefore poses the problem of the methods of introducing the sleeves 1a, 1b through the opening 7, for their installation on the partition 3. According to the illustrated exemplary embodiments, the sleeves 1a, 1b are preferably introduced through the partition 3 in a direction S1 of introduction which is oriented from the engine compartment 4a towards the passenger compartment 4b.

To solve this problem, a solution is proposed by the present invention to allow an operator to quickly and easily introduce a sleeve 1a, 1b pertaining to the invention through the opening 7 that comprises the partition 3. Such an operation is carried out without risk of injuring the acoustic insulation lip 6b. The solution proposed by the invention is structurally simple and its implementation is easy to carry out by an operator, with the advantage of limiting as much as possible the additional costs induced by the proposed solution.

According to the embodiments of the invention illustrated respectively on the one hand in Figures 2 to 4 and in Figure 6, and on the other hand in Figure 5, the acoustic insulation lip 6b is provided with a plurality seizure bodies 10a, 10b. Said gripping members 10a, 10b are angularly distributed along a direction defined by the architecture of the external perimeter of the acoustic insulation lip 6b, which is for example of circular architecture.

As more particularly visible in FIGS. 3 and 4, the gripping members 10a are arranged more or less close to the peripheral edge 8b of the acoustic insulation lip 6b. The gripping members 10a provide passages adapted to collectively receive a removable link 11 closed in a loop on itself via its ends 11a, 11b, which extends successively from one to the other of the gripping members 10a. The removable nature of the link 11 on the acoustic insulation lip 6b is the ability of an operator to remove the link 11 due to a break in its loop closure on itself, such as for example by breakage of the link ends 11a, 11b of link 11 to each other.

According to the embodiment shown in Figures 2 to 4 and in the diagram (c) of Figure 6, the gripping members 10a are formed of orifices formed through the acoustic insulation lip 6b. Such orifices are for example formed by cutting out the acoustic insulation lip 6b. The link 11 is for example formed of a semi-rigid wire closed in a loop on itself by twisting its ends 11a, 11b to one another.

According to the embodiment shown in FIG. 5, the gripping members 10b are formed of hooks which are integrated into the acoustic insulation lip 6b. The hooks are for example formed by tongues shaped as a square which potentially come from the material of which the acoustic insulation lip 6b is made. Such hooks can be integrated into the acoustic insulation lip 6b during its molding, by joint molding or by overmolding of the hooks on the acoustic insulation lip 6b.

In FIG. 2, the link 11 is mounted by an operator on the acoustic insulation lip 6b at the outlet of a workshop for manufacturing the sleeve 1a, pending its installation on the partition 3. At the end of this phase of preparation of the sleeve 1a, the latter is recognizable in that it is provided with the link 11 placed in successive grips collectively with the gripping members 10a.

In diagram (a), the operator threads the link 11 successively through the gripping members 10a formed by the orifices. Then in diagram (b), the operator exerts a traction jointly on one and the other of the ends 11a, 11b of the link 11, with the effect of causing a radial tightening of the acoustic insulation lip 6b to reduce its diametral dimension of extension.

Then the operator links together the ends 11a, 11b of the link 11 to a set dimension D3 of diametrical extension of the acoustic insulation lip 6b. It is understood here that the nominal dimension D3 is less than the diametrical dimension D2 of the opening 7 that the sleeves 1a, 1b are intended to pass through for their mounting on the partition 3 as illustrated in the diagram (c) of the figure. 6.

As illustrated in FIGS. 3 and 4, the acoustic insulation lip 6b then has a corolla conformation, as a result of the flap towards the axis A1 of the sleeve 1 has portions of the acoustic insulation lip 6b extending between two gripping members 10a adjacent to each other.

According to the example illustrated, there are 8 gripping members 10a. It is understood here that the number of gripping members 10a is liable to vary according to the diametrical dimension D1b of the acoustic insulation lip 6b in the deployed position. , being of a number suitable for easily providing the operator with radial tightening of the acoustic insulation lip 6b to the set dimension D3.

It will be noted that the methods of installing the link 11 on the gripping members 10a which have just been described for the sleeve 1a relating to the first embodiment example, are similar by transposition to those of installing a link 11 on the gripping members 10b of the sleeve 1b relating to the second embodiment shown in FIG. 5.

As illustrated in FIG. 2 as well as in FIGS. 5 and 6, the acoustic insulation lip 6b is preferably connected to the drum 5 via a hinge 12, such as for example formed by a weakening of its junction zone with the barrel 5. Such a hinge 12 promotes the passage of the acoustic insulation lip 6b between on the one hand its station deployed as illustrated in diagram (a) of FIG. 2, in FIG. 5 and in diagram (d) in FIG. 6, and on the other hand its radial clamping station by the link 11 as illustrated in the diagram (b) of FIG. 2 and in the diagram (c) of FIG. 6.

In FIG. 6, the sleeve 1a previously prepared as illustrated in FIG. 2, is installed on the partition 3 according to the methods successively illustrated in the diagrams (c) and (d). In diagram (c), the sleeve 1a is introduced by translation through the opening 7 which comprises the partition 3, in a predefined direction S1 of introduction. The direction S1 of insertion of the sleeve 1a through the opening 7 is notably defined with regard to the relative positions on the barrel 5 of the acoustic insulation lip 6b and of the sealing lip 6a. More particularly in the direction S1 of introduction of the sleeve 1a through the opening 7, the acoustic insulation lip 6b is located upstream relative to the sealing lip 6a.

As a reminder, the acoustic insulation lip 6b is clamped by the link 11 to said set dimension D3, which is less than the diametrical dimension D2 of the opening 7. The introduction by translation of the sleeve 1a through the opening 7 can therefore be carried out by the operator without particular difficulty, up to the axial application of the sealing lip 6a against the partition 3. The installation methods through the partition 3 of the sleeve 1a falling under the first example of embodiments which have just been described, are similar by transposition to those of installation of the sleeve 1b relating to the second exemplary embodiment shown in FIG. 5.

In diagram (d) of FIG. 6 and in FIG. 5, the operator then removes the link 11 from the acoustic insulation lip 6b. The link 11 is a consumable item of low cost which is then discarded. The structural elasticity of the acoustic insulation lip 6b then causes it to pass into a deployed station and consequently its application against the partition 3.

Claims (10)

1Device for passing a bundle of electric cables (2) through an opening (7) made through a partition (3), the device comprising a sleeve (1a, 1b) axially (A1) extended whose recess provides a passage of the cable bundle (2) through it, the sleeve (1a, 1b) comprising a barrel (5) provided at its respective axial ends with a sealing lip (6a) and a sealing lip sound insulation (6b) each arranged in an elastically deformable flared skirt, characterized in that at least any one of the lips (6a, 6b) is provided with a plurality of gripping members (10a, 10b) of the lip ( 6a, 6b) which are angularly distributed near its periphery, by successively providing passages for receiving a removable link (11) for radial tightening of said at least one lip (6a, 6b). 2, - Device according to claim 1, characterized in that the gripping members (10a, 10b) are integrated into the lip (6a, 6b) either by cutting the material of the lip (6a, 6b), or being derived from the material constituting the lip (6a, 6b), or by sealing. 3, - Device according to any one of claims 1 and 2, characterized in that the gripping members (10a, 10b) are each formed indifferently from an orifice formed through the lip (6a, 6b), or a hook projecting from the lip (6a, 6b) on an inner face of the lip (6a, 6b) via which the lip (6a, 6b) bears axially against the partition (3). 4, - Device according to any one of claims 1 to 3, characterized in that the link (11) is formed either of a string closed in a loop on itself via a reversible connecting node between its ends, or d '' a semi-rigid wire closed in a loop on itself by reversible twisting of its ends (11a, 11b) to each other, or of an irreversible clamping collar of its ends to each other capable of being broken by means of a sharp tool. 5. - Device according to any one of claims 1 to 4, characterized in that the lip (6a, 6b) is joined to the barrel (5) via a zone of weakening of the lip (6a, 6b) providing a hinge (12) articulation between the lip (6a, 6b) and the barrel (5). 6. - Device according to any one of claims 1 to 5, characterized in that the sleeve (1a, 1b) is provided with at least one plating member (9) forcing an elastic axial support grip of the at least one of the lips (6a, 6b) against the partition (3). 7. - A method of installation through a partition (3) of a sleeve (1a, 1b) participating in a device according to any one of claims 1 to 6, characterized in that the method comprises at least the operations following by an operator: -) prior to the introduction of the sleeve (1a, 1b) through the opening (7) made through the partition (3), put the link (11) on the lip (6a, 6b) by placing it successively engaged on said gripping members (10a, 10b), then exert a tightening of the link (11) causing a radial deformation of the lip (6a, 6b) until a diametrical dimension of the lip is obtained ( 6a, 6b) lower than that of the opening (7) and immobilize the link (11) reversibly on itself in the clamping position, then -) introduce the sleeve (1a, 1b) through the opening (7) via the end of the barrel (5) provided with the lip (6a, 6b) clamped by the link (11), then remove the link (11 ) of the lip (6a, 6b) by breaking its reversible immobilization on itself, to allow the elastic deployment of the lip (6a, 6b) against the partition (3). 8. - Method according to claim 7, characterized in that as a result of the tightening of the lip (6a, 6b) by the link (11), the lip (6a, 6b) is folded down towards the axis of extension of the sleeve (1a, 1b) being oriented in extension of the barrel (5) substantially axially towards the outside of the sleeve (1a, 1b). 9, - Motor vehicle characterized in that the vehicle is equipped with at least one sleeve (1a, 1b) participating in a device according to any one of claims 1 to 6, said at least one sleeve (1a, 1b) passing through a partition (3) of the vehicle and the link (11) being removed from said at least one lip (6a, 6b) provided 5 of said gripping members (1 Oa, 10b), which is applied axially against the partition (3). 10. - Motor vehicle according to claim 9, characterized in that said at least one sleeve (1a, 1b) is installed on an apron forming a said partition 10 (3) for separation between an engine compartment (4a) and a passenger compartment (4b) of the vehicle.