Motor vehicle assembly and motor vehicle comprising such an assembly

Abstract

Motor vehicle assembly and motor vehicle comprising such an assembly. The invention relates to a motor vehicle assembly (1), comprising:- an air conditioning unit (3) comprising a centering lug (13),- a defrosting duct (17), comprising a centering finger (15) receiving said centering lug, said centering lug being blocked in transverse translation and in vertical translation by said centering finger.According to the invention, the assembly (1) comprises a longitudinal translation stop device (19) mounted on said centering finger (15) and adapted to block said centering lug (13) in longitudinal translation relative to said centering finger (15). The invention also relates to a motor vehicle comprising an assembly (1). Figure 1

Description

Title of the invention: Motor vehicle assembly and motor vehicle comprising such an assembly Technical field

[0001] The invention relates to the field of motor vehicles, in particular to the field of the interface between the air conditioning unit and the defrosting duct of the motor vehicle.

[0002] The invention relates more particularly to a motor vehicle assembly and a motor vehicle comprising such an assembly. Prior art

[0003] The air conditioning unit of a motor vehicle is fixed to an apron of the body structure of the vehicle, behind which a soundproofing mat is mounted.

[0004] Behind the soundproofing mat is the passenger compartment of the motor vehicle, in particular receiving a dashboard, while in front is the engine compartment.

[0005] The air conditioning unit comprises a centering tab received on a centering finger of a defrosting duct mounted in the dashboard of the passenger compartment.

[0006] The air conditioning unit is held in transverse translation and in vertical translation by the centering finger of the defrosting duct which receives the centering tab of the air conditioning unit.

[0007] On the other hand, the air conditioning unit is not maintained in longitudinal translation.

[0008] When the motor vehicle is subjected to vibrations, for example when the vehicle is traveling on a damaged road, the centering tab of the air conditioning unit slides longitudinally alternately towards the front and towards the rear of the motor vehicle, along the centering finger of the defrosting duct.

[0009] This sliding in longitudinal translation causes friction generating parasitic noise directly perceptible by the occupants of the vehicle present in the passenger compartment given the fact that the sliding occurs behind the soundproofing mat.

[0010] This parasitic noise is very harmful for the occupants, particularly in terms of perception of the quality of the motor vehicle. Statement of the invention

[0011] The present invention aims to overcome the aforementioned drawbacks, and to this end relates to a motor vehicle assembly, comprising: - an air conditioning unit including a centering bracket, - a defrosting duct, comprising a centering finger receiving said centering tab, said centering tab being blocked in transverse translation and in vertical translation by said centering finger, said assembly being remarkable in that it comprises a longitudinal translation stop device mounted on said centering finger and adapted to block said centering tab in longitudinal translation relative to said centering finger.

[0012] Thus, by providing for equipping such an assembly with a longitudinal translation stop device mounted on the centering finger of the defrosting duct and adapted to block the centering tab of the air conditioning unit in longitudinal translation, the air conditioning unit is blocked not only in transverse translation and in vertical translation, but also in longitudinal translation.

[0013] In this way, when the motor vehicle is subjected to vibrations, for example because it is driving on a damaged road, the centering lug of the air conditioning unit no longer slides longitudinally along the centering finger of the defrosting duct, either towards the rear or towards the front of the motor vehicle.

[0014] By eliminating any translational sliding of the centering lug of the air conditioning unit along the centering finger of the defrosting duct, the present invention thus eliminates any friction generating parasitic noise perceptible in the prior art by the occupants of the motor vehicle present in the passenger compartment.

[0015] Also, the fact that the stop device is mounted on the centering finger of the defrosting duct makes it possible not to have to modify the air conditioning unit, which is very advantageous for the manufacturer from a logistical point of view given the fact that the air conditioning unit is identical to several vehicles.

[0016] According to optional characteristics of the assembly according to the invention: - said longitudinal translation stop device comprises at least one contact rib carried by said centering finger and forming a shoulder adapted to block said centering lug in translation towards the rear of said motor vehicle, and a block of absorbent material, mounted compressed between said centering lug and an apron of a body structure of said motor vehicle. Thus, the solution proposed by the present invention is simple to implement and very economical; - said block of absorbent material consists of a ring of plastic foam having a density of between approximately 100 kg / m3 and approximately 125 kg / m3; - said at least one contact rib is arranged laterally relative to said centering finger; - the assembly comprises two contact ribs arranged on either side of a longitudinal median plane of said centering finger; - said centering finger comprises at least one longitudinal stiffening rib; - the distance DI between a rear end of said centering finger and said at least one contact rib carried by said centering finger is between about 55mm and about 65mm.

[0017] The invention also relates to a motor vehicle comprising an assembly, remarkable in that said assembly is according to the invention. Brief description of the drawings

[0018] Other characteristics, aims and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the appended drawings in which:

[0019] [Fig-1] is a longitudinal sectional view of a motor vehicle assembly according to the invention, the view being centered on an air conditioning unit of the assembly.

[0020] [Fig.2] is an enlargement of zone II of [Fig. 1].

[0021] [Fig.3] is a perspective view of the centering finger of the defrosting duct according to an alternative embodiment of the assembly according to the invention. Description of the embodiments

[0022] In the remainder of the description, elements having an identical structure or similar functions are designated by the same reference.

[0023] By convention, we will adopt, without limitation, longitudinal, vertical and transverse orientations indicated by the direct trihedron (L, V, T) designating the longitudinal, vertical and transverse axes of the vehicle.

[0024] In the following, the terms “left”, “right”, “lower” and “upper” are understood in relation to the vehicle.

[0025] Similarly, the terms “front” and “rear” are understood in relation to the general orientation of the vehicle as taken in its normal direction of travel.

[0026] Reference is made to [Fig.l] which is a longitudinal sectional view of a motor vehicle assembly 1 according to the invention, the view being centered on an air conditioning unit 3 of the assembly 1.

[0027] The air conditioning unit 3 is fixed on an apron of the body structure of the vehicle, behind which a soundproofing mat 5 is mounted.

[0028] Behind the soundproofing mat is the passenger compartment 7 of the motor vehicle, receiving in particular a dashboard 9, while in front of the soundproofing mat 5 is the engine compartment.

[0029] The assembly formed by the apron and the soundproofing mat 5 comprises a cutout receiving a clip 11. The clip is for example mounted by clipping onto the soundproofing mat 5, by means of lugs.

[0030] The air conditioning unit 3 comprises a centering tab 13 received on a centering finger 15 of a defrosting duct 17 of the assembly 1, mounted in the dashboard 9 of the passenger compartment.

[0031] The air conditioning unit 3 is maintained in transverse translation and in translation vertical by the centering finger 15 of the defrosting duct 17 which receives the centering tab 13 of the air conditioning unit 3.

[0032] According to the invention, the assembly 1 comprises a device 19 for stopping in longitudinal translation.

[0033] The longitudinal translation stop device 19 is mounted on the centering finger 15 of the defrosting duct 17 and adapted to block the centering tab 13 in longitudinal translation relative to the centering finger 15.

[0034] Reference is made to [Fig.2] showing an enlargement of zone II of [Fig. 1].

[0035] In the embodiment illustrated in the figures, the longitudinal translation stop device 19 comprises at least one contact rib 21, carried by the centering finger 15.

[0036] The contact rib 21 forms a shoulder or an appendage which extends from the centering finger 15 of the defrosting duct 17 and on which a rear face 23 of the centering lug 13 of the air conditioning unit 3 rests.

[0037] The shoulder formed by the contact rib 21 is thus adapted to block the centering lug 15 in translation towards the rear of the motor vehicle.

[0038] Thus, when the motor vehicle is subjected to vibrations, for example because it is driving on a damaged road, the centering tab 13 of the air conditioning unit 3 no longer slides longitudinally towards the rear of the motor vehicle along the centering finger 15 of the defrosting duct 17.

[0039] In the embodiment illustrated in Figures 1 and 2, the contact rib 21 is arranged above a horizontal median plane Pi of the centering finger 15 contained in a plane (L, T). Alternatively, the contact rib 21 may be arranged below the horizontal median plane Pi.

[0040] Also, in the embodiment illustrated in Figures 1 and 2, the centering finger 15 of the defrosting duct 17 comprises a single contact rib 21. As a variant, the centering finger 15 may comprise one or more contact ribs 21.

[0041] In a particular embodiment, the distance Di may be equal to approximately 61 mm.

[0042] In the embodiment illustrated in the figures, the longitudinal translation stopping device 19 further comprises a block 25 made of absorbent material which is mounted compressed in the assembly 1 between a rear face 27 of the centering lug 13 and the apron of the body structure of the vehicle behind which the soundproofing mat 5 is mounted.

[0043] The function of the block 25 made of absorbent material is twofold.

[0044] First of all, the block 25 made of absorbent material has a thickness suitable for allowing a translational stop of the centering tab 13 towards the front of the motor vehicle, along the centering finger 15.

[0045] Then, the block 25 made of absorbent material has the role of ensuring the play between the centering tab 13 of the air conditioning unit 3 and the clip 11 received in the cutout carried by the apron and the soundproofing mat 5.

[0046] Thus, when the motor vehicle is subjected to vibrations, the centering tab 13 of the air conditioning unit 3 no longer slides longitudinally towards the front of the motor vehicle along the centering finger 15 of the defrosting duct 17.

[0047] For example, the block 25 of absorbent material may consist of a ring of plastic foam, for example polyvinyl chloride (PVC), having a density of between approximately 100 kg / m3 and approximately 125 kg / m3, for example approximately 115 kg / m 3

[0048] The assembly of the assembly 1 is carried out as follows.

[0049] An operator positions the centering tab 13 of the air conditioning unit 3 on the centering finger 15 of the defrosting duct 17.

[0050] The operator then slides the air conditioning unit 3 towards the rear, along the centering finger 15, until it comes into abutment against the contact rib 21, blocking the translation of the centering tab 13 towards the rear of the motor vehicle.

[0051] The operator then mounts the block 25 made of absorbent material on the centering finger 15.

[0052] During the assembly step of the motor vehicle, the clip 11 is introduced into the cutout carried by the apron of the soundproofing mat 5, which compresses the block 25 of absorbent material against the centering tab 13 of the air conditioning unit 3, thus blocking its translation towards the front of the motor vehicle.

[0053] Reference is made to [Fig. 3] which is a perspective view of the centering finger 15 of the defrosting duct 17 according to an alternative embodiment.

[0054] The centering finger here comprises two contact ribs 31 arranged on either side of a longitudinal median plane P2 of the centering finger 15 contained in a plane (L, V).

[0055] Unlike the embodiment shown in the example illustrated in Figures 1 and 2, the contact ribs 31 are here arranged laterally relative to the centering finger 15. The contact ribs 31 are here substantially contained in the horizontal median plane Pi of the centering finger 15.

[0056] The provision of contact ribs 31 arranged laterally relative to the centering finger 15 simplifies the manufacturing method compared to the variant in which the contact ribs 21 are arranged above or below the horizontal median plane Pi of the centering finger 15.

[0057] According to an alternative embodiment not illustrated in the figures, a single contact rib 31 can be arranged laterally relative to the centering finger 15. However, this would weaken the plane support connection formed between the contact rib 31 and the rear face 23 of the centering lug 13 of the air conditioning unit 3.

[0058] According to a disposition common to the variant embodiments of the centering finger 15, the distance Di between a rear end 29 of the centering finger 15 and the contact rib 21, or one or other of the contact ribs 31, is between approximately 55 mm and approximately 65 mm. In a particular exemplary embodiment, the distance Di may be equal to approximately 61 mm.

[0059] According to another arrangement of the assembly 1, the centering finger 15 may comprise longitudinal stiffening ribs 33. The presence of the longitudinal stiffening ribs 33 gives stiffness to the centering finger 15 of the defrosting duct 17, which allows the dashboard 9 which carries the defrosting duct to be mounted in a sufficiently rigid manner in the motor vehicle.

[0060] As goes without saying, the present invention is not limited to the sole embodiments of this motor vehicle assembly and of this motor vehicle comprising such an assembly, described above solely as illustrative examples, but on the contrary it embraces all the variants involving the technical equivalents of the means described as well as their combinations if these fall within the scope of the invention.

Claims

Claims

1. Motor vehicle assembly (1), comprising: - an air conditioning unit (3) comprising a centering lug (13), - a defrosting duct (17), comprising a centering finger (15) receiving said centering lug (13), said centering lug (13) being blocked in transverse translation and in vertical translation by said centering finger (15), said assembly (1) being characterized in that it comprises a device (19) for stopping longitudinal translation mounted on said centering finger (15) and adapted to block said centering lug (13) in longitudinal translation relative to said centering finger (15).

2. Assembly (1) according to claim 1, characterized in that said device (19) for stopping in longitudinal translation comprises: - at least one contact rib (21, 31) carried by said centering finger (15) and forming a shoulder adapted to block said centering lug (13) in translation towards the rear of said motor vehicle, - a block (25) of absorbent material, mounted compressed between said centering lug (13) and an apron of a body structure of said motor vehicle.

3. Assembly (1) according to claim 2, characterized in that said block (25) of absorbent material consists of a ring of plastic foam having a density of between approximately 100 kg / m3 and approximately 125 kg / m3.

4. Assembly (1) according to one of claims 2 or 3, characterized in that said at least one contact rib (31) is arranged laterally relative to said centering finger (15).

5. Assembly (1) according to any one of claims 2 to 4, characterized in that it comprises two contact ribs (31) arranged on either side of a longitudinal median plane (P2) of said centering finger (15).

6. Assembly (1) according to any one of claims 1 to 5, characterized in that said centering finger (15) comprises at least one longitudinal stiffening rib (33).

7. Assembly (1) according to any one of claims 2 to 5 or according to claim 6 combined with any one of claims 2 to 5, characterized in that the distance (DJ) between a rear end (29) of said centering finger (15) and said at least one rib

8. contact (21, 31) carried by said centering finger (15) is between approximately 55mm and approximately 65mm. Motor vehicle comprising an assembly (1), characterized in that said assembly (1) is according to any one of claims 1 to 7.

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