EP1979196A2 - Acoustic protection device for motor vehicle body shell - Google Patents
Acoustic protection device for motor vehicle body shellInfo
- Publication number
- EP1979196A2 EP1979196A2 EP07731499A EP07731499A EP1979196A2 EP 1979196 A2 EP1979196 A2 EP 1979196A2 EP 07731499 A EP07731499 A EP 07731499A EP 07731499 A EP07731499 A EP 07731499A EP 1979196 A2 EP1979196 A2 EP 1979196A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- floor
- pressing member
- covering elements
- screen
- acoustic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
- B60R13/0861—Insulating elements, e.g. for sound insulation for covering undersurfaces of vehicles, e.g. wheel houses
Definitions
- the present invention relates to an improvement made to a device for improving the acoustic protection of the body defining the passenger compartment of a motor vehicle, in particular vis-à-vis noises of various origins created by the rolling of the vehicle on the ground and which, without particular precautions, are transmitted through the floor of this cabin, creating for the users sitting in it, an unacceptable embarrassment.
- the present invention relates to an improvement made to a structure of this kind comprising, on the one hand, arranged under the floor of the passenger compartment, covering elements of a sound-absorbing material, on the other hand a lower acoustic screen spaced screws to the floor, and means of connection between the floor, these elements and the screen, this improvement being designed to significantly improve the performance of the assembly from the point of view of sound insulation of the cabin of the vehicle.
- the device in question is characterized in that the covering elements are pressed against the lower face of the floor by means of at least one pressing member comprising a two-part floor profile, with at least one upper flat face applied under the cover elements and at least one lower flat surface secured to the acoustic screen.
- the invention thus makes it possible to decouple the pressing function against the lower surface of the floor of the covering elements of absorbent material, which improves their efficiency by a better damping of the sound vibrations due to their compression thus obtained, and the function devolved to the acoustic screen whose structure is not dependent on the particular profile of the floor and the covering elements applied to it, this screen may have a particular shape different from that of the floor to improve, so independent, its own performance.
- the pressing member may locally comprise, under the floor, profiled zones, made in particular hollow, reinforcing the damping effect of the sound and improving its own rigidity.
- the covering elements held under the floor by the pressing member are constituted by blocks or volumes of felt or similar material, bagged in one or more envelopes of a plastic or other packaging.
- the pressing member has ends bearing on the surface of the floor and having areas of smaller thickness, flexible, allowing this pressing member to absorb local differences in level with the floor, adjusting the support of these ends on the latter according to its height variations.
- the pressing member is provided with lightening holes distributed in its surface outside its upper face applied to the covering elements, these holes notably allowing the flow of stagnant water having been able to infiltrate between the floor and the pressing member.
- the acoustic screen is removably attached to the floor at the same time as the pressing member, by means of connecting fingers secured to the floor and extending perpendicularly to its surface.
- FIG. 1 is a sectional view of the device according to the invention, illustrating its essential parts.
- FIG. 2 is a sectional view, on a larger scale, of a detail of the device of FIG. 1.
- FIG. 3 is a view also on a larger scale of a part of the device according to FIG. a detail of the organ near you.
- FIGS. 4 and 5 are other sectional views of a portion of the device showing the means for fixing under the vehicle floor of the pressing member and the acoustic screen.
- reference numeral 1 denotes, schematically, the floor of the body of a motor vehicle, consisting essentially of a sheet or other metal structure 2, suitably shaped to fit the lower part of the body. cabin, but whose particular detail does not directly matter to the invention, except to specify that this sheet 2 extends mainly in a horizontal plane above the ground (not shown) on which rolls the vehicle.
- the floor 1 is associated with an acoustic screen 3 made of metal or a suitable rigid plastic material, this screen being placed under the sheet 2 above the ground and arranged in such a way as to delimit with the here a free space 4.
- This screen 3 is provided to provide protection of the passenger compartment above the floor and has for this purpose a suitable profile, which varies depending on the position of the screen under the body to improve its performance, both a acoustic point of view only from a mechanical point of view.
- the acoustic protection of the body is improved by applying and fixing under the metal sheet 2 of the floor, by gluing or by points or by zones, or by any other suitable conventional method, covering elements 5, in one material having sound absorption properties, these absorbent elements being in the form of elongate blocks or similar volumes, relatively flat to fit the lower surface of the floor 1, and preferably being contained in one or more envelopes of packaging 6 in a flexible plastic material, to facilitate their transport and especially their establishment under the sheet 2 of the floor 1.
- the covering elements 5 are made by means of a textile felt, the fibers of which are already suitably compacted during the manufacture of the material before being put into place in the packages 6.
- the installation under the floor 1 of the acoustic screen 3 and the elements covering 5 of absorbent material is provided by means of pressing members 7, each consisting of a sheet, preferably of a plastic material or the like, relatively thin but nevertheless sufficiently rigid, suitably shaped, these pressing members being distributed according to the surface of the floor 1 and comprising a floor profile in two parts, with at least one and preferably several upper flat faces 8 which are directly applied under the elements 5 so as to ensure the close support of these under the metal sheet 2 in further compressing slightly the absorbent material of these elements, and at least one and preferably several lower flat faces 9 which are secured to the screen 3, in particular in parts thereof which extend under the floor 1, substantially parallel to and at a distance from the latter.
- the screen 3 and the pressing member 7 are secured to the floor 1 by means of fixing assemblies 11, the details of which are described below.
- the lower planar faces 9 of the pressing member are secured portions 10 of the screen 3 against which they rely, by welding or by any other suitable means, such as screw and nut, clip or other.
- the end edges 12 of the pressing member 7, on each side of the floor 1, are raised and comprise a zone 13 of smaller thickness, giving the sheet which constitutes this member increased flexibility, in particular the end 14 of this sheet which rests under the floor 2, allowing the pressing member 7 to absorb local differences in level of this floor while closing laterally the space 4 between the sheet 2 and the screen 3.
- the upper faces 8 of the pressing member 7 which are applied under the covering elements 5 of absorbent material may comprise, as shown in the view on a larger scale of Figure 3, profiled zones 15, made in recesses, in particular by localized stamping of the sheet 2, these zones ensuring its mechanical reinforcement and also improving the damping effect of the sound.
- zones 15 may advantageously comprise lightening holes 16 which form communication passages with the air contained in the space 4 and also can ensure the flow therein of the stagnant water which, during the rolling of the vehicle, could be introduced into this space and be distributed in contact with the covering elements 5.
- Figure 3 also illustrates, on a larger scale, the detail of a fastening assembly 11 between the floor 1, the acoustic screen 3 and the pressing member 7.
- This assembly 11 mainly comprises a finger 17 fixed by any suitable means under the sheet 2 of the floor 1 which extends vertically downwards, perpendicular to it, this finger ending in a spherical portion 18 arranged to cooperate with a coupler 19 by engaging in an open groove 20 of the same profile, provided in the latter.
- This coupler 19 advantageously consists of a molded part made of a material having a relative elasticity to ensure the clamping of the spherical part 18 of the finger 17 when it engages in the groove 20, this part also having an external groove 21 into which the suitably folded ends engage, respectively 22 for the screen 3 and 23 for the pressing member 7.
- FIG. 4 illustrates an improvement made to the fixing assembly 11, wherein the finger 17 fixed under the sheet 2 of the floor 1 and extending vertically from it, comprises, in addition to a portion of spherical end 18 intended to cooperate with a coupler 20 to secure the finger with the ends 22 and 23 of the acoustic screen 3 on the one hand, and the pressing member 7 on the other hand, an intermediate spherical portion 24 for allow to carry by the finger, between the pressing member 7 and the cover members 5, a support 25 forming a reception rack for cables, pipes or the like (not shown), housed in cells 26 of this support, that it being arranged in a space of appropriate dimensions 27, formed under the floor 1, between the latter and the corresponding part of the pressing member 7.
- FIG. 4 illustrates a covering element 5, a pressing member 7 with a support member 25 and the acoustic screen 3, before mounting on the finger 17 of the fastener 11 carried by the sheet 2 of the floor 1, Figure 5 showing the same parts once this assembly done.
- An acoustic protection device is thus produced for the body of a motor vehicle of very simple design, using in particular, between the screen which extends at a distance under the floor of the passenger compartment and sound-absorbing material covering elements, pressed against the underside of the sheet which forms this floor, pressing members which increase the surface compressed of these elements by optimizing their own acoustic efficiency and which also ensure the connection with the screen, these parts being secured together the floor.
- These pressing members are independent of the acoustic screen itself and in particular make it possible to retain the aerodynamic shape of this screen, which may be substantially different from that of the floor itself; in addition, these pressure members can be easily shaped on their side edges so as to close the free space between the floor and the acoustic screen, these edges being further arranged to allow an adjustment of their height to follow the possible variations of level of the floor against which they rest.
- the covering elements of sound absorbing material remain in place under this floor because of their attachment by gluing or other means, if necessary being maintained by the support rack engaged on the spherical portion of the finger which cooperates therewith.
- the sheets that make up the pressing members, which apply against the covering elements could be made of other materials on a case by case basis, adapted best to the function they fulfill.
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
Abstract
The invention concerns an acoustic protection device for the body shell delimiting the passenger compartment of a motor vehicle comprising, arranged on the floor (1) of said passenger compartment, covering elements (5) made of a sound-absorbing material, and a lower acoustic panel (3) spaced apart opposite the floor, and linking means (11) between the floor, said elements and the panel. The invention is characterized in that the covering elements (5) are pressed against the lower surface of the floor by means of at least one pressing member (7) including at least one stepped profile in two parts, with at least one upper planar surface (8) pressed under the covering element (5) and at least one lower planar surface (9) secured to the acoustic panel.
Description
Dispositif de protection acoustique pour caisse de véhicule automobile. Sound protection device for a motor vehicle body.
La présente invention est relative à un perfectionnement apporté à un dispositif destiné à améliorer la protection acoustique de la caisse délimitant l'habitacle d'un véhicule automobile, notamment vis-à-vis des bruits d'origines diverses créés par le roulement du véhicule sur le sol et qui, sans précautions particulières, se transmettent à travers le plancher de cet habitacle, en créant pour les usagers assis dans celui-ci, une gêne inacceptable.The present invention relates to an improvement made to a device for improving the acoustic protection of the body defining the passenger compartment of a motor vehicle, in particular vis-à-vis noises of various origins created by the rolling of the vehicle on the ground and which, without particular precautions, are transmitted through the floor of this cabin, creating for the users sitting in it, an unacceptable embarrassment.
De nombreux dispositifs de ce genre sont déjà bien connus dans la technique, consistant notamment à monter sous le plancher de la caisse, en regard du sol, un écran s'étendant sensiblement parallèlement au plancher et fixé à celui-ci par des moyens appropriés pour laisser libre un espace entre l'un et l'autre.Many such devices are already well known in the art, consisting in particular to mount under the floor of the box, facing the ground, a screen extending substantially parallel to the floor and fixed thereto by means suitable for leave free space between one and the other.
Dans cet espace, peuvent être disposés des éléments de recouvrement de la surface inférieure du plancher, constitués d'un matériau absorbant le son, créant un amortissement substantiel des vibrations sonores reçues, ces éléments étant maintenus en position par l'écran inférieur. Un exemple de réalisation d'un dispositif de ce type est par exemple décrit dans le brevet EP 068 409.In this space, may be arranged lower surface covering elements of the floor, consisting of a sound-absorbing material, creating a substantial damping of sound vibrations received, these elements being held in position by the lower screen. An exemplary embodiment of a device of this type is for example described in patent EP 068 409.
Toutefois, la nécessité de conformer l'écran pour lui permettre de satisfaire à sa fonction essentielle d'amortissement des bruits acoustiques, rend son profil mal adapté à la fixation des éléments de recouvrement sous la surface du plancher dont la forme et les dimensions sont
souvent sensiblement différentes de celles de 1 ' écran .However, the need to conform the screen to enable it to meet its essential function of damping acoustic noise, makes its profile poorly suited to fixing the cover elements under the floor surface whose shape and dimensions are often significantly different from those of the screen.
La présente invention concerne un perfectionnement apporté à une structure de ce genre comportant, d'une part, disposés sous le plancher de l'habitacle, des éléments de recouvrement en un matériau absorbant le son, d'autre part un écran acoustique inférieur espacé vis-à-vis du plancher, et des moyens de liaison entre le plancher, ces éléments et l'écran, ce perfectionnement étant conçu de manière à améliorer de façon notable les performances du montage du point de vue de l'isolation acoustique de l'habitacle du véhicule. A cet effet, le dispositif considéré se caractérise en ce que les éléments de recouvrement sont plaqués contre la face inférieure du plancher au moyen d'au moins un organe presseur comportant un profil étage en deux parties, avec au moins une face plane supérieure appliquée sous les éléments de recouvrement et au moins une face plane inférieure solidarisée de l'écran acoustique.The present invention relates to an improvement made to a structure of this kind comprising, on the one hand, arranged under the floor of the passenger compartment, covering elements of a sound-absorbing material, on the other hand a lower acoustic screen spaced screws to the floor, and means of connection between the floor, these elements and the screen, this improvement being designed to significantly improve the performance of the assembly from the point of view of sound insulation of the cabin of the vehicle. For this purpose, the device in question is characterized in that the covering elements are pressed against the lower face of the floor by means of at least one pressing member comprising a two-part floor profile, with at least one upper flat face applied under the cover elements and at least one lower flat surface secured to the acoustic screen.
L'invention permet ainsi de découpler la fonction de pressage contre la surface inférieure du plancher des éléments de recouvrement en matériau absorbant, ce qui améliore leur efficacité par un meilleur amortissement des vibrations sonores du fait de leur compression ainsi obtenue, et la fonction dévolue à l'écran acoustique dont la structure n'est pas tributaire du profil particulier du plancher et des éléments de recouvrement appliqués sur celui-ci, cet écran pouvant comporter une forme particulière différente de celle du plancher afin d'améliorer, de façon
indépendante, ses propres performances.The invention thus makes it possible to decouple the pressing function against the lower surface of the floor of the covering elements of absorbent material, which improves their efficiency by a better damping of the sound vibrations due to their compression thus obtained, and the function devolved to the acoustic screen whose structure is not dependent on the particular profile of the floor and the covering elements applied to it, this screen may have a particular shape different from that of the floor to improve, so independent, its own performance.
Selon une autre caractéristique, l'organe presseur peut comporter localement, sous le plancher, des zones profilées, réalisées notamment en creux, renforçant l'effet d'amortissement du son et améliorant sa rigidité propre.According to another characteristic, the pressing member may locally comprise, under the floor, profiled zones, made in particular hollow, reinforcing the damping effect of the sound and improving its own rigidity.
Avantageusement, les éléments de recouvrement maintenus sous le plancher par l'organe presseur, sont constitués par des blocs ou volumes de feutre ou matériau similaire, ensachés dans une ou plusieurs enveloppes d'un emballage plastique ou autre .Advantageously, the covering elements held under the floor by the pressing member, are constituted by blocks or volumes of felt or similar material, bagged in one or more envelopes of a plastic or other packaging.
Selon encore une autre caractéristique, l'organe presseur comporte des extrémités portant sur la surface du plancher et présentant des zones de plus faible épaisseur, flexibles, permettant à cet organe presseur d'absorber les différences locales de niveau avec le plancher, en ajustant l'appui de ces extrémités sur ce dernier en fonction de ses variations de hauteur.According to yet another characteristic, the pressing member has ends bearing on the surface of the floor and having areas of smaller thickness, flexible, allowing this pressing member to absorb local differences in level with the floor, adjusting the support of these ends on the latter according to its height variations.
Dans un mode de réalisation particulier, l'organe presseur est muni de trous d'allégement répartis dans sa surface en dehors de sa face supérieure appliquée sur les éléments de recouvrement, ces trous permettant notamment l'écoulement de l'eau stagnante ayant pu s'infiltrer entre le plancher et l'organe presseur.In a particular embodiment, the pressing member is provided with lightening holes distributed in its surface outside its upper face applied to the covering elements, these holes notably allowing the flow of stagnant water having been able to infiltrate between the floor and the pressing member.
De préférence également, l'écran acoustique est fixé au plancher de façon amovible en même temps que l'organe presseur, au moyen de doigts de liaison solidaires du plancher et s'étendant perpendiculairement à sa surface.Also preferably, the acoustic screen is removably attached to the floor at the same time as the pressing member, by means of connecting fingers secured to the floor and extending perpendicularly to its surface.
D'autres caractéristiques d'un dispositif comportant un organe presseur conforme à
l'invention, pour appliquer sous le plancher de la caisse d'un véhicule automobile des éléments de recouvrement en matériau absorbant, cet organe étant relié à un écran acoustique s'étendant sous ce plancher, apparaîtront encore à travers la description qui suit d'un exemple de réalisation, donné à titre indicatif et non limitatif, en référence aux dessins annexés sur lesquels :Other features of a device comprising a pressing member according to the invention, for applying under the floor of the body of a motor vehicle covering elements of absorbent material, this member being connected to an acoustic screen extending under this floor, will still appear through the following description of an exemplary embodiment, given by way of indication and not limitation, with reference to the accompanying drawings in which:
- La Figure 1 est une vue en coupe du dispositif conforme à l'invention, illustrant ses parties essentielles.- Figure 1 is a sectional view of the device according to the invention, illustrating its essential parts.
- La Figure 2 est une vue en coupe, à plus grande échelle, d'un détail du dispositif de la Figure 1. - La Figure 3 est une vue également à plus grande échelle d'une partie du dispositif selon la Figure 1, illustrant un détail de l'organe près seur .2 is a sectional view, on a larger scale, of a detail of the device of FIG. 1. FIG. 3 is a view also on a larger scale of a part of the device according to FIG. a detail of the organ near you.
- Les Figures 4 et 5 sont d'autres vues en coupe d'une partie du dispositif faisant apparaître les moyens permettant la fixation sous le plancher du véhicule de l'organe presseur et de l'écran acoustique .- Figures 4 and 5 are other sectional views of a portion of the device showing the means for fixing under the vehicle floor of the pressing member and the acoustic screen.
Sur la Figure 1, la référence 1 désigne, représenté de façon schématique, le plancher de la caisse d'un véhicule automobile, consistant essentiellement en une tôle ou autre structure métallique 2, convenablement conformée pour s'adapter à la partie inférieure de l'habitacle, mais dont le détail particulier n'importe pas directement à l'invention, sauf à préciser que cette tôle 2 s'étend principalement dans un plan horizontal au-dessus du sol (non représenté) sur lequel roule ce véhicule.
De façon usuelle dans la technique, le plancher 1 est associé à un écran acoustique 3, en métal ou en un matériau plastique rigide approprié, cet écran étant disposé sous la tôle 2 au-dessus du sol et agencé de manière à délimiter avec celle-ci un espace libre 4.In Figure 1, reference numeral 1 denotes, schematically, the floor of the body of a motor vehicle, consisting essentially of a sheet or other metal structure 2, suitably shaped to fit the lower part of the body. cabin, but whose particular detail does not directly matter to the invention, except to specify that this sheet 2 extends mainly in a horizontal plane above the ground (not shown) on which rolls the vehicle. In the usual way in the art, the floor 1 is associated with an acoustic screen 3 made of metal or a suitable rigid plastic material, this screen being placed under the sheet 2 above the ground and arranged in such a way as to delimit with the here a free space 4.
Cet écran 3 est prévu pour assurer une protection de l'habitacle au-dessus du plancher et présente à cet effet un profil adapté, qui varie selon la position de l'écran sous la caisse afin d'améliorer ses performances, tant d'un point de vue acoustique que d'un point de vue mécanique.This screen 3 is provided to provide protection of the passenger compartment above the floor and has for this purpose a suitable profile, which varies depending on the position of the screen under the body to improve its performance, both a acoustic point of view only from a mechanical point of view.
De manière également connue, la protection acoustique de la caisse est améliorée en appliquant et fixant sous la tôle métallique 2 du plancher, par collage ou par points ou par zones, ou par tout autre procédé classique approprié, des éléments de recouvrement 5, en un matériau présentant des propriétés d'absorption du son, ces éléments absorbants se présentant sous la forme de blocs allongés ou de volumes similaires, relativement plats pour s'adapter à la surface inférieure du plancher 1, et étant de préférence contenus dans une ou plusieurs enveloppes d'emballage 6 en un matériau plastique souple, permettant de faciliter leur transport et surtout leur mise en place sous la tôle 2 du plancher 1.Also known, the acoustic protection of the body is improved by applying and fixing under the metal sheet 2 of the floor, by gluing or by points or by zones, or by any other suitable conventional method, covering elements 5, in one material having sound absorption properties, these absorbent elements being in the form of elongate blocks or similar volumes, relatively flat to fit the lower surface of the floor 1, and preferably being contained in one or more envelopes of packaging 6 in a flexible plastic material, to facilitate their transport and especially their establishment under the sheet 2 of the floor 1.
De préférence, les éléments de recouvrement 5 sont réalisés au moyen d'un feutre textile, dont les fibres sont déjà convenablement compactées lors de la fabrication du matériau avant mise en place dans les emballages 6.Preferably, the covering elements 5 are made by means of a textile felt, the fibers of which are already suitably compacted during the manufacture of the material before being put into place in the packages 6.
Conformément à l'invention, le montage sous le plancher 1 de l'écran acoustique 3 et des éléments
de recouvrement 5 en matériau absorbant est assuré au moyen d'organes presseurs 7, constitués chacun d'une tôle, de préférence en un matériau plastique ou similaire, relativement mince mais néanmoins suffisamment rigide, convenablement conformée, ces organes presseurs étant répartis selon la surface du plancher 1 et comportant un profil étage en deux parties, avec au moins une et de préférence plusieurs faces planes supérieures 8 qui sont directement appliquées sous les éléments 5 de manière à assurer l'appui étroit de ceux-ci sous la tôle métallique 2 en comprimant en outre légèrement le matériau absorbant de ces éléments, et au moins une et de préférence plusieurs faces planes inférieures 9 qui sont solidarisées de l'écran 3, notamment dans les parties 10 de celui- ci qui s'étendent sous le plancher 1, sensiblement parallèlement et à distance de ce dernier.According to the invention, the installation under the floor 1 of the acoustic screen 3 and the elements covering 5 of absorbent material is provided by means of pressing members 7, each consisting of a sheet, preferably of a plastic material or the like, relatively thin but nevertheless sufficiently rigid, suitably shaped, these pressing members being distributed according to the surface of the floor 1 and comprising a floor profile in two parts, with at least one and preferably several upper flat faces 8 which are directly applied under the elements 5 so as to ensure the close support of these under the metal sheet 2 in further compressing slightly the absorbent material of these elements, and at least one and preferably several lower flat faces 9 which are secured to the screen 3, in particular in parts thereof which extend under the floor 1, substantially parallel to and at a distance from the latter.
L'écran 3 et l'organe presseur 7 sont solidarisés du plancher 1 au moyen d'ensembles de fixation 11 dont le détail est décrit ci-après. En outre, les faces planes inférieures 9 de l'organe presseur sont solidarisées des parties 10 de l'écran 3 contre lesquelles elles s'appuient, par soudure ou par tout autre moyen convenable, du genre vis et écrou, clip ou autre.The screen 3 and the pressing member 7 are secured to the floor 1 by means of fixing assemblies 11, the details of which are described below. In addition, the lower planar faces 9 of the pressing member are secured portions 10 of the screen 3 against which they rely, by welding or by any other suitable means, such as screw and nut, clip or other.
Avantageusement, les bords d'extrémité 12 de l'organe presseur 7, de chaque côté du plancher 1, sont relevés et comportent une zone 13 de plus faible épaisseur, conférant à la tôle qui constitue cet organe une flexibilité accrue, notamment de l'extrémité 14 de cette tôle qui s'appuie sous le plancher 2, permettant à l'organe presseur 7 d'absorber les différences locales de niveau de ce
plancher tout en fermant latéralement l'espace 4 compris entre la tôle 2 et l'écran 3.Advantageously, the end edges 12 of the pressing member 7, on each side of the floor 1, are raised and comprise a zone 13 of smaller thickness, giving the sheet which constitutes this member increased flexibility, in particular the end 14 of this sheet which rests under the floor 2, allowing the pressing member 7 to absorb local differences in level of this floor while closing laterally the space 4 between the sheet 2 and the screen 3.
Les faces supérieures 8 de l'organe presseur 7 qui s'appliquent sous les éléments de recouvrement 5 en matériau absorbant, peuvent comporter, comme illustré sur la vue à plus grande échelle de la Figure 3, des zones profilées 15, réalisées en creux, notamment par emboutissage localisé de la tôle 2, ces zones assurant son renforcement mécanique et améliorant également l'effet d'amortissement du son.The upper faces 8 of the pressing member 7 which are applied under the covering elements 5 of absorbent material, may comprise, as shown in the view on a larger scale of Figure 3, profiled zones 15, made in recesses, in particular by localized stamping of the sheet 2, these zones ensuring its mechanical reinforcement and also improving the damping effect of the sound.
Ces zones 15 peuvent avantageusement comporter des trous d'allégement 16 qui forment des passages de communication avec l'air contenu dans l'espace 4 et également peuvent assurer l'écoulement dans celui-ci de l'eau stagnante qui, lors du roulement du véhicule, a pu s'introduire dans cet espace et se répartir au contact des éléments de recouvrement 5. La Figure 3 illustre également, à plus grande échelle, le détail d'un ensemble de fixation 11 entre le plancher 1, l'écran acoustique 3 et l'organe presseur 7.These zones 15 may advantageously comprise lightening holes 16 which form communication passages with the air contained in the space 4 and also can ensure the flow therein of the stagnant water which, during the rolling of the vehicle, could be introduced into this space and be distributed in contact with the covering elements 5. Figure 3 also illustrates, on a larger scale, the detail of a fastening assembly 11 between the floor 1, the acoustic screen 3 and the pressing member 7.
Cet ensemble 11 comporte principalement un doigt 17 fixé par tout moyen convenable sous la tôle 2 du plancher 1 qui s'étend verticalement vers le bas, perpendiculairement à celui-ci, ce doigt se terminant par une partie sphérique 18 agencée pour coopérer avec un coupleur 19 en s'engageant dans une rainure ouverte 20 de même profil, prévue dans ce dernier .This assembly 11 mainly comprises a finger 17 fixed by any suitable means under the sheet 2 of the floor 1 which extends vertically downwards, perpendicular to it, this finger ending in a spherical portion 18 arranged to cooperate with a coupler 19 by engaging in an open groove 20 of the same profile, provided in the latter.
Ce coupleur 19 est avantageusement constitué d'une pièce moulée en un matériau présentant une relative élasticité pour assurer le serrage de la
partie sphérique 18 du doigt 17 lorsqu'elle s'engage dans la rainure 20, cette pièce comportant par ailleurs une gorge externe 21 dans laquelle s'engagent les extrémités convenablement repliées, respectivement 22 pour l'écran 3 et 23 pour l'organe presseur 7.This coupler 19 advantageously consists of a molded part made of a material having a relative elasticity to ensure the clamping of the spherical part 18 of the finger 17 when it engages in the groove 20, this part also having an external groove 21 into which the suitably folded ends engage, respectively 22 for the screen 3 and 23 for the pressing member 7.
Les Figures 4 et 5 illustrent un perfectionnement apporté à l'ensemble de fixation 11, selon lequel le doigt 17 fixé sous la tôle 2 du plancher 1 et qui s'étend verticalement à partir de celle-ci, comporte, outre une partie d'extrémité sphérique 18 destinée à coopérer avec un coupleur 20 pour solidariser le doigt avec les extrémités 22 et 23 de l'écran acoustique 3 d'une part, et de l'organe presseur 7 d'autre part, une partie sphérique intermédiaire 24 destinée à permettre de faire porter par le doigt, entre l'organe presseur 7 et les éléments de recouvrement 5, un support 25 formant râtelier de réception pour des câbles, tuyauteries ou similaires (non représentées), logés dans des alvéoles 26 de ce support, celui-ci étant disposé dans un espace de dimensions appropriées 27, ménagé sous le plancher 1, entre celui-ci et la partie correspondante de l'organe presseur 7. La Figure 4 illustre un élément de recouvrement 5, un organe presseur 7 avec un support 25 et l'écran acoustique 3, avant montage sur le doigt 17 de l'élément de fixation 11 porté par la tôle 2 du plancher 1, la Figure 5 représentant les mêmes pièces une fois ce montage effectué .Figures 4 and 5 illustrate an improvement made to the fixing assembly 11, wherein the finger 17 fixed under the sheet 2 of the floor 1 and extending vertically from it, comprises, in addition to a portion of spherical end 18 intended to cooperate with a coupler 20 to secure the finger with the ends 22 and 23 of the acoustic screen 3 on the one hand, and the pressing member 7 on the other hand, an intermediate spherical portion 24 for allow to carry by the finger, between the pressing member 7 and the cover members 5, a support 25 forming a reception rack for cables, pipes or the like (not shown), housed in cells 26 of this support, that it being arranged in a space of appropriate dimensions 27, formed under the floor 1, between the latter and the corresponding part of the pressing member 7. FIG. 4 illustrates a covering element 5, a pressing member 7 with a support member 25 and the acoustic screen 3, before mounting on the finger 17 of the fastener 11 carried by the sheet 2 of the floor 1, Figure 5 showing the same parts once this assembly done.
On réalise ainsi un dispositif de protection acoustique pour la caisse d'un véhicule automobile de conception très simple, utilisant en
particulier, entre l'écran qui s'étend à distance sous le plancher de l'habitacle et des éléments de recouvrement en matériau absorbant le son, plaqués contre la face inférieure de la tôle qui forme ce plancher, des organes presseurs qui augmentent la surface compressée de ces éléments en optimisant leur efficacité acoustique propre et qui assurent d'autre part la liaison avec l'écran, ces pièces étant solidarisées ensemble du plancher. Ces organes presseurs sont indépendants de l'écran acoustique lui-même et permettent en particulier de conserver la forme aérodynamique de cet écran, laquelle peut être sensiblement différente de celle du plancher lui-même ; de plus, ces organes presseurs peuvent être aisément conformés sur leurs bords latéraux de manière à fermer l'espace libre ménagé entre le plancher et l'écran acoustique, ces bords étant en outre agencés pour autoriser un ajustement de leur hauteur afin de suivre les éventuelles variations de niveau du plancher contre lequel ils s'appuient.An acoustic protection device is thus produced for the body of a motor vehicle of very simple design, using in particular, between the screen which extends at a distance under the floor of the passenger compartment and sound-absorbing material covering elements, pressed against the underside of the sheet which forms this floor, pressing members which increase the surface compressed of these elements by optimizing their own acoustic efficiency and which also ensure the connection with the screen, these parts being secured together the floor. These pressing members are independent of the acoustic screen itself and in particular make it possible to retain the aerodynamic shape of this screen, which may be substantially different from that of the floor itself; in addition, these pressure members can be easily shaped on their side edges so as to close the free space between the floor and the acoustic screen, these edges being further arranged to allow an adjustment of their height to follow the possible variations of level of the floor against which they rest.
A noter que lors d'un démontage de l'écran et de ces organes presseurs, pour intervention sur le plancher du véhicule, les éléments de recouvrement en matériau absorbant le son, restent en place sous ce plancher du fait de leur fixation par collage ou autre moyen, le cas échéant en étant maintenus par le râtelier de support engagé sur la partie sphérique du doigt qui coopère avec celui-ci. Bien entendu, il va de soi que l'invention ne se limite pas à l'exemple plus spécialement décrit ci-dessus et représenté en référence aux dessins annexés ; elle en embrasse au contraire toutes les variantes. Notamment les tôles qui constituent les
organes presseurs, qui s'appliquent contre les éléments de recouvrement, pourraient être réalisées en d'autres matériaux au cas par cas, adaptés au mieux à la fonction qu'ils remplissent.
Note that during disassembly of the screen and these pressing members, for intervention on the floor of the vehicle, the covering elements of sound absorbing material, remain in place under this floor because of their attachment by gluing or other means, if necessary being maintained by the support rack engaged on the spherical portion of the finger which cooperates therewith. Of course, it goes without saying that the invention is not limited to the example more specifically described above and shown with reference to the accompanying drawings; on the contrary, it embraces all variants. In particular, the sheets that make up the pressing members, which apply against the covering elements, could be made of other materials on a case by case basis, adapted best to the function they fulfill.
Claims
REVENDICATIONS
1 - Dispositif de protection acoustique pour la caisse délimitant l'habitacle d'un véhicule automobile comportant, d'une part, disposés sous le plancher (1) de cet habitacle, des éléments de recouvrement (5) en un matériau absorbant le son, d'autre part un écran acoustique inférieur (3) espacé vis-à-vis du plancher, et des moyens de liaison (11) entre le plancher, ces éléments et l'écran, caractérisé en ce que les éléments de recouvrement (5) sont plaqués contre la face inférieure du plancher au moyen d'au moins un organe presseur (7) comportant un profil étage en deux parties, avec au moins une face plane supérieure (8) appliquée sous les éléments de recouvrement (5) et au moins une face plane inférieure (9) solidarisée de l'écran acoustique (3) . 2 - Dispositif selon la revendication 1, caractérisé en ce que l'organe presseur (7) comporte localement, sous le plancher (1), des zones profilées (15), réalisées en creux, renforçant l'effet d'amortissement du son et améliorant sa rigidité propre.1 - Acoustic protection device for the body defining the passenger compartment of a motor vehicle comprising, on the one hand, arranged under the floor (1) of this passenger compartment, covering elements (5) made of a sound-absorbing material, on the other hand a lower acoustic screen (3) spaced from the floor, and connecting means (11) between the floor, these elements and the screen, characterized in that the covering elements (5) are pressed against the lower face of the floor by means of at least one pressing member (7) having a two-part floor profile, with at least one upper planar face (8) applied under the covering elements (5) and at least one a lower flat face (9) secured to the acoustic screen (3). 2 - Device according to claim 1, characterized in that the pressing member (7) locally comprises, under the floor (1), contoured zones (15), hollowed out, reinforcing the damping effect of the sound and improving its own rigidity.
3 - Dispositif selon l'une des revendications 1 ou 2, caractérisé en ce que les éléments de recouvrement (5) en matériau absorbant, maintenus sous le plancher (1) par l'organe presseur (7), sont constitués par des blocs ou volumes de feutre ou matériau similaire, ensachés dans une ou plusieurs enveloppes (6) d'un emballage plastique ou autre .3 - Device according to one of claims 1 or 2, characterized in that the covering elements (5) of absorbent material, held under the floor (1) by the pressing member (7), are constituted by blocks or volumes of felt or similar material, packed in one or more envelopes (6) of a plastic or other wrapping.
4 - Dispositif selon l'une quelconque des
revendications 1 à 3, caractérisé en ce que l'organe presseur (7) comporte des bords latéraux4 - Device according to any one of Claims 1 to 3, characterized in that the pressing member (7) has lateral edges
(12) dont les extrémités (14) portent sur la surface du plancher (1) et présentant des zones (13) de plus faible épaisseur, flexibles, permettant à cet organe presseur d'absorber les différences locales de niveau avec le plancher.(12) whose ends (14) bear on the floor surface (1) and having areas (13) of smaller thickness, flexible, allowing this pressing member to absorb local differences in level with the floor.
5 - Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé en ce que l'organe presseur (7) est muni de trous d'allégement (16) répartis dans sa surface en dehors de sa face supérieure (8) appliquée sur les éléments de recouvrement (5) en matériau absorbant.5 - Device according to any one of claims 1 to 4, characterized in that the pressing member (7) is provided with lightening holes (16) distributed in its surface outside its upper face (8) applied on the covering elements (5) of absorbent material.
6 - Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'écran acoustique (3) est fixé au plancher (1) de façon amovible en même temps que l'organe presseur (7), au moyen de doigts de liaison (17) solidaires du plancher et s'étendant perpendiculairement à sa surface.
6 - Device according to any one of claims 1 to 5, characterized in that the acoustic screen (3) is fixed to the floor (1) removably at the same time as the pressing member (7), by means of connecting fingers (17) integral with the floor and extending perpendicularly to its surface.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0650329A FR2896743B1 (en) | 2006-01-31 | 2006-01-31 | ACOUSTIC PROTECTIVE DEVICE FOR A MOTOR VEHICLE BODY |
| PCT/FR2007/050652 WO2007088293A2 (en) | 2006-01-31 | 2007-01-15 | Acoustic protection device for motor vehicle body shell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1979196A2 true EP1979196A2 (en) | 2008-10-15 |
Family
ID=36968888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07731499A Pending EP1979196A2 (en) | 2006-01-31 | 2007-01-15 | Acoustic protection device for motor vehicle body shell |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1979196A2 (en) |
| FR (1) | FR2896743B1 (en) |
| WO (1) | WO2007088293A2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2933341B1 (en) * | 2008-07-04 | 2011-02-11 | Peugeot Citroen Automobiles Sa | SYSTEM FOR CONNECTING AN EXHAUST COMPONENT OF A MOTOR VEHICLE TO A BODY COMPONENT OF SAID VEHICLE |
| FR2958599B1 (en) * | 2010-04-07 | 2013-03-08 | Peugeot Citroen Automobiles Sa | BI-SHIELD INSONORIZATION DEVICE |
| FR3052396B1 (en) * | 2016-06-10 | 2018-07-13 | Cera Aps | DEVICE FOR COLLECTING AND SEPARATING WATER AND VENTILATION AIR FROM A MOTOR VEHICLE HABITACLE |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS581735U (en) | 1981-06-26 | 1983-01-07 | 日産自動車株式会社 | Automotive engine undercover |
| JPH0676035B2 (en) * | 1986-04-09 | 1994-09-28 | マツダ株式会社 | Structure of automobile vibration control panel |
| JP3026694B2 (en) * | 1993-04-19 | 2000-03-27 | 河西工業株式会社 | Soundproofing materials for vehicles |
| FR2817995B1 (en) * | 2000-12-08 | 2003-02-28 | Cera | ACOUSTIC ABSORPTION COMPLEX |
| FR2860468B1 (en) * | 2003-10-02 | 2007-01-12 | Cera | DEFLECTOR UNDER BODY HAVING ACOUSTIC PROTECTION PROPERTIES |
-
2006
- 2006-01-31 FR FR0650329A patent/FR2896743B1/en not_active Expired - Fee Related
-
2007
- 2007-01-15 WO PCT/FR2007/050652 patent/WO2007088293A2/en active Application Filing
- 2007-01-15 EP EP07731499A patent/EP1979196A2/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2007088293A3 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2896743A1 (en) | 2007-08-03 |
| FR2896743B1 (en) | 2008-07-25 |
| WO2007088293A3 (en) | 2007-09-20 |
| WO2007088293A2 (en) | 2007-08-09 |
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