阅读说明：本技术 使设备固定在机动车辆车身的中空主体上的固定插入件 (Fixing insert for fixing a device to a hollow body of a motor vehicle body ) 是由 L·里维埃 于 2020-04-16 设计创作，主要内容包括：本发明涉及一种机动车辆,所述机动车辆包括：车身(1),所述车身具有至少一个中空主体(15)；具有膨胀发泡产品(19)的充填插入件(13),所述充填插入件布置在所述至少一个中空主体(15)中；设备(5)的固定插入件(11),所述固定插入件容置在经实施在所述至少一个中空主体(15)中的孔口(17)中。而且,经实施在所述至少一个中空主体(15)中的孔口(17)与对应的充填插入件(13)隔有小于15mm的距离；并且,所述固定插入件(11)包括处在所述至少一个中空主体(15)中的内部面(12),所述中空主体(15)中的膨胀发泡产品(19)接触和贴合所述固定插入件(11)的内部面(12)。(The invention relates to a motor vehicle comprising: -a body (1) having at least one hollow body (15); a filling insert (13) with an expanded foaming product (19), arranged in said at least one hollow body (15); a fixing insert (11) of the device (5) housed in an aperture (17) implemented in said at least one hollow body (15). Moreover, the orifice (17) implemented in said at least one hollow body (15) is separated from the corresponding filling insert (13) by a distance of less than 15 mm; and the fixing insert (11) comprises an inner face (12) in the at least one hollow body (15), the expanded foamed product (19) in the hollow body (15) contacting and conforming to the inner face (12) of the fixing insert (11).)

1. A motor vehicle, comprising:

-a body (1) having at least one hollow body (15);

-a filling insert (13) with an expanded foaming product (19), arranged in said at least one hollow body (15);

-a fixing insert (11) of the device (5) housed in an orifice (17) implemented in said at least one hollow body (15);

it is characterized in that the preparation method is characterized in that,

-the orifice (17) implemented in said at least one hollow body (15) is spaced from the corresponding filling insert (13) by a distance of less than 15 mm; and the fixing insert (11) comprises an inner face (12) in the at least one hollow body (15), the expanded foamed product (19) in the hollow body (15) contacting and conforming to the inner face (12) of the fixing insert (11).

2. A motor vehicle according to claim 1, characterized in that the fixing insert (11) is housed in the aperture (17) before an anti-corrosion coating is deposited on the body (1) and subjected to a polymerization heat treatment, so that the fixing insert (11) is covered by the anti-corrosion coating.

3. A motor vehicle according to claim 2, characterized in that the anticorrosion coating forms a continuous layer on the fixing insert (11) and on the body (1) adjacent to the fixing insert (11) at the interface of engagement between the fixing insert (11) and the body (1).

4. The motor vehicle according to any one of claims 1 to 3, characterized in that the filling insert (13) comprises: a support member extending out of an outwardly open peripheral groove in an extension of the support member; and a strip of expanded foamed product (19) in thermal expansion contact with the hollow body (15).

5. A motor vehicle according to any one of claims 1-4, characterised in that the at least one hollow body (15) is bounded by a rear fender (3) and a lining (1) of the rear fender, the hollow body (15) extending mainly vertically and bounding a rear edge of a rear door access opening.

6. A motor vehicle according to any one of claims 1 to 5, characterised in that it comprises a device (5), said device (5) being an airbag module which is fixed to the vehicle body (1) by means of screws (7.3) engaged in the fixing inserts (11).

7. A motor vehicle according to claims 5 and 6, characterised in that the airbag module (5) is secured against the lining (1) of the rear fender (3) and is configured for deploying an airbag forwards at the chest level of an occupant of the motor vehicle.

8. The motor vehicle according to any one of claims 1 to 7, characterized in that the fixing insert (11) has a hardness greater than 100 ° Shore A.

9. A vehicle manufacturing method, comprising the steps of:

-assembling bodywork elements (1, 3) so as to form a body-in-white of a vehicle, the bodywork (1) forming at least one hollow body (15) housing a filling insert (13) with an expanded foaming product (19), and in which an orifice (17) is implemented for housing a fixing insert (11) of an apparatus (5);

-applying an anti-corrosion coating to the body-in-white and subjecting the anti-corrosion coating to a polymerizing heat treatment;

it is characterized in that the preparation method is characterized in that,

an orifice (17) implemented in said at least one hollow body (15) is separated from a corresponding filling insert (13) by a distance of less than 15mm, and, before the application step and the heat treatment step of the anti-corrosion coating, the fixing insert (11) is housed in said orifice (17) so as to act as an expansion limit for the expanded material (19) during said heat treatment.

10. Method for manufacturing a vehicle according to claim 9, characterized in that the vehicle is a motor vehicle according to any one of claims 1 to 7.

Technical Field

The present invention claims priority from french application 1904518 filed on 29/4/2019, the contents of which (text, drawings and claims) are incorporated herein by reference.

The present invention relates to the field of motor vehicle bodies, more particularly to the fixing of some devices on the hollow body of the body, and even more particularly to the fixing of an airbag module on the rear panel lining of the body.

Background

The assembly operation of the body-in-white of a motor vehicle requires fixing during the assembly (transfer) step of a plurality of body parts. After the subsequent painting and/or electrophoretic steps, the device is then fitted on these body elements. In some cases, the assembled body parts form, in particular, a hollow body in which at least one filling insert (insert d' assembly) is disposed, which consists essentially of expandable foam, the effect of which is to close the hollow body to limit or prevent the emergence of external noise in the passenger compartment of the vehicle.

It is also usual for the device to be fixed on the body by means of fixing screws which engage in corresponding apertures implemented in the body. The engagement of the fixing screw may be carried out via a fixing insert made of plastic material, which is placed into the aperture after the vehicle body has been subjected to electrophoretic treatment and painting.

However, this presents difficulties when one or more apertures are in the vicinity of the filling insert, since the expandable material of the filling insert expands during the body heating step in the electrophoretic environment and may thus fill or further escape from the one or more apertures depending on various parameters, such as, inter alia, the expansion rate of the material, the size of the one or more apertures and the distance between the material and the one or more apertures.

The removal of this excess intumescent material requires the implementation of additional manual steps and may also compromise the elegance and perceived quality of the vehicle.

Disclosure of Invention

The present invention aims to overcome at least one of the above-mentioned disadvantages of the prior art. More specifically, the invention aims to facilitate the assembly of the device on the bodywork element forming a hollow body in which a filling pad or filling insert made of expandable foam is placed. In this sense, the invention therefore also aims to optimize the assembly time of the apparatus, while being simple and economical to implement.

To this end, the object of the invention is to provide a motor vehicle comprising: a body having at least one hollow body; a filling insert with an expanded foaming product, the filling insert being arranged in the at least one hollow body; a fixing insert of the device, said fixing insert being housed in an aperture implemented in said at least one hollow body;

characterized in that the aperture implemented in the at least one hollow body is separated from the corresponding filling insert by a distance of less than 15 mm; and, the fixing insert comprises an internal face in the at least one hollow body, the expanded foaming product in the hollow body contacting and conforming to the internal face of the fixing insert.

According to an advantageous embodiment of the invention, the fixing insert is housed in the aperture before an anti-corrosion coating is deposited on the bodywork and the coating is submitted to a polymerization heat treatment, so that the insert is covered by the coating.

According to an advantageous embodiment of the invention, the anticorrosion coating forms a continuous layer on the fixing insert and on the bodywork adjacent to the insert, at the interface of joining between the insert and the bodywork.

According to an advantageous embodiment of the invention, the filling insert comprises: a support member extending out of an outwardly open peripheral groove in an extension of the support member; and a strip of foamed product in thermal expansion contact with the hollow body.

According to an advantageous embodiment of the invention, the at least one hollow body is bounded by a rear fender and a lining of the rear fender, the hollow body extending largely vertically and bounding a rear edge of a rear door access opening.

According to an advantageous embodiment of the invention, the vehicle comprises a device which is an airbag module which is fixed to the vehicle body by means of screws engaged in the fixing inserts.

According to an advantageous embodiment of the invention, the airbag module is fixed against the lining of the rear fender and is configured for deploying the airbag forward at the chest level of an occupant of the vehicle.

According to an advantageous embodiment of the invention, said fixing insert has a hardness greater than 100 ° Shore.

Advantageously, the fixing insert is made of a material chosen to be able to withstand the thermal cycles of the painting step without degrading the mechanical properties of the fixing insert.

It is also an object of the present invention to provide a vehicle manufacturing method including the steps of: assembling bodywork elements so as to form a body-in-white of a vehicle, the bodywork forming at least one hollow body housing a filling insert with a foamed product, and in which an orifice is implemented for housing a fixing insert of an apparatus; applying an anti-corrosion coating to the body-in-white and subjecting the coating to a polymerizing heat treatment; characterized in that an orifice implemented in said at least one hollow body is separated from a corresponding filling insert by a distance of less than 15mm and in that, before the application step and the heat treatment step of the anti-corrosive coating, the fixing insert is housed in said orifice so as to act as a limit of expansion of the foamed material during said heat treatment.

According to an advantageous embodiment of the invention, the vehicle is in accordance with the invention.

The measure of the invention is interesting in that the fixing insert in fact not only serves to prevent the expanding foam of the filling insert from escaping into the passenger compartment through the fixing hole or fixing orifice of the body part (which has at least one hollow body), but also serves as a fixing interface for fixing the device on the same body part. The anti-spill function of the fixing insert is of more interest, since it is thus possible to ensure a good expansion of the foamed product of the filling insert in the hollow body of the body part during the heat treatment. The measures of the invention are also more interesting, since the fixing insert also facilitates the assembly of the device and saves time. In this sense, the measure of the invention thus makes it possible to avoid the use of an alternative solution which is longer to set up and which consists of two successive steps, namely the setting of an insert to ensure good expansion of the foamed product and to prevent the latter from escaping through the fixing hole of the bodywork part, and then the removal of this insert to set up a soft material screw-plastic fixing interface capable of fixing the equipment.

Drawings

Other features and advantages of the present invention will become more apparent upon reading the following detailed description and the accompanying drawings, in which:

figure 1 is a perspective view of the assembly of an airbag module on a rear side panel lining of a motor vehicle body according to the invention.

Fig. 2 is a perspective view of the rear side panel lining of fig. 1 before the airbag module is fixed, with the filling insert accommodated in the hollow body formed by the rear side panel lining being shown transparently.

Figure 3 is a transverse section of the hollow body formed by the rear panel lining of the bodywork, this section taking place at the screw position of the fixing insert.

Detailed Description

Fig. 1 shows a perspective view of the assembly of an airbag module on a part of a rear side panel lining of a motor vehicle body. The quarter panel lining 1 is a body part fixed by welding to the body in white 3 and is formed by at least one hollow body (not visible) in which at least one filling insert (not visible) with foamed product (not visible) is arranged to reduce external noise in the passenger compartment. As regards the airbag module 5, it is configured for deploying an airbag (not visible) forward at the chest level of an occupant (not shown) of the vehicle. In particular, the device 5 is fixed to the rear side panel lining 1 of the vehicle body by means of a plurality of fixing screws 7.1, 7.2, 7.3. In the case of fig. 1, the airbag module 5 is fastened to the rear side panel lining 1 of the vehicle body by means of three fastening screws 7.1, 7.2, 7.3. These fixing screws 7.1, 7.2, 7.3 are oriented opposite one another (oppoes) and are arranged on the contour of the airbag module 5. However, if each of these screws 7.1, 7.2 cooperates with a nut 8.1, 8.2 through an aperture (not visible) made in the rear body panel lining 1, the third screw 7.3 (which is located near the hollow body (not visible) of the rear body panel lining 1) itself engages in a fixing insert 11 housed in an aperture (not visible) made in this same hollow body (not visible).

FIG. 2 is a perspective view of the bodyside liner of FIG. 1 prior to attachment of the airbag module. Fig. 2 makes it possible to see transparently the filling insert 13 accommodated in the hollow body 15 formed by the rear side panel lining 1 of the vehicle body and the aperture 17 embodied in the hollow body 15, in which the fixing insert 11 is inserted. In fact, the orifice 17 is spaced from the filling insert 13 by a distance of less than 15 mm. The seating of the fixing insert 11 in the aperture 17 is carried out in particular before an anti-corrosion coating (not shown) is deposited on the vehicle body and this same anti-corrosion coating is subjected to a polymerization heat treatment, which in some way forms a thin continuous layer on the fixing insert 11 and on the vehicle body 1 adjacent to this insert 11. The fixing insert 11 is thereby also covered and protected by the corrosion protection coating. Advantageously, the fixing insert 11 is made of plastic and has a hardness greater than 100 ° Shore a. The plastic material is chosen from materials compatible with the anti-corrosion coating, that is to say the coating in question adheres satisfactorily to the material. The material of the fixing insert 11 is also advantageously chosen to withstand the thermal cycles of the painting step without degrading the thermal characteristics of the fixing insert.

At the same time, during the polymerization heat treatment of the coating, the filler insert 13 also extends in the hollow body 15 of the rear side panel lining 1 of the vehicle body. Advantageously, the filling insert 13 comprises: a support (not shown) extending out of a peripheral slot (not shown) opening out of the support; and a strip of foamed product 19 which expands under the effect of the increase in heat to thereby contact and conform to the inner face 12 of the fixing insert 11 positioned in the hollow body 15.

The enlarged view of fig. 2 shows in particular the fixing insert 11, which comprises: a main portion 11.1, which is generally cylindrical and is inserted in said aperture; and a flange 11.2, which rests against the rear panel lining 1 of the vehicle body. Since the main portion 11.1 is housed in the hollow body, the outer surface of the main portion thus forms the inner face 12 of the fixing insert 11. It can be observed that a portion of the strip of expanded cellular product 19 forming the filling insert 13 contacts and conforms to the shape of the inner face 12 of the fixing insert 11 on the main portion 11.1 of said insert 11.

Fig. 3 is a transverse sectional view of a hollow body formed by the vehicle body rear side panel lining 1, to which an airbag module (see fig. 1) is fixed. This transverse cross-section of fig. 3 is embodied in particular at the location of the fixing insert 11 and the fixing screws 7.3, which are preferably made of a soft material (for example plastic or at least non-metallic material) and engage in the fixing insert 11 to maintain the fixing of the airbag module 5 on the rear side panel lining 1 of the vehicle body. In the case of this fig. 3, the hollow body is bounded by the rear fender 3 and the lining 1 of this rear fender, the hollow body 15 extending largely vertically and bounding the rear edge of a rear door access (not shown). The main portion 11.1 of the fixing insert 11 is housed in an aperture 17 made in the hollow body 15, the flange 11.2 of this same insert 11 resting on the rear panel lining 1 of the body (see also fig. 2). In this fig. 3, it is assumed that the foamed product 19 filling the insert 13 occupies the entire volume of the hollow body 15.

Generally, during the manufacture of a motor vehicle according to the invention, first, the body elements are assembled in order to form a vehicle body or body in white. The vehicle body has at least one body part with a hollow body accommodating a filling insert with an expanding foamed product. In order to subsequently fix the device to the hollow body of the body part, in particular in the vicinity of the filling insert, there is also at least one opening in the hollow body of the body part, which opening is at a distance of less than 15mm from the filling insert. A fixing insert is housed in said aperture or in each of the apertures concerned. Then, an anti-corrosion coating and a polymerization heat treatment for this coating are applied on the whole of said body parts and thus on the fixing inserts for fixing the body parts with the hollow body. During the implementation of this same heat treatment, the expanded foaming product of the filling insert also extends in the hollow body and is implemented to contact and conform to the inner face of the fixing insert in the hollow body. In this way, the fixing insert of the vehicle according to the invention simultaneously serves to limit the expansion of the foaming material of the filling insert through the orifice and as a fixing interface for the fixing of the device in the fixing insert via the soft material fixing screw, since no excess coating needs to be removed at the location of the orifice.