FR2878208A1 - Motor vehicle chassis shock absorber has peripheral and interior absorption zones with lengthwise and transverse ribs respectively - Google Patents
Motor vehicle chassis shock absorber has peripheral and interior absorption zones with lengthwise and transverse ribs respectively Download PDFInfo
- Publication number
- FR2878208A1 FR2878208A1 FR0452708A FR0452708A FR2878208A1 FR 2878208 A1 FR2878208 A1 FR 2878208A1 FR 0452708 A FR0452708 A FR 0452708A FR 0452708 A FR0452708 A FR 0452708A FR 2878208 A1 FR2878208 A1 FR 2878208A1
- Authority
- FR
- France
- Prior art keywords
- absorber
- shock absorber
- shock
- contour
- peripheral
- 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.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/04—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects formed from more than one section in a side-by-side arrangement
- B60R19/12—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects formed from more than one section in a side-by-side arrangement vertically spaced
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/24—Arrangements for mounting bumpers on vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/18—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects characterised by the cross-section; Means within the bumper to absorb impact
- B60R2019/1806—Structural beams therefor, e.g. shock-absorbing
- B60R2019/1833—Structural beams therefor, e.g. shock-absorbing made of plastic material
- B60R2019/184—Blow moulded
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
- B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
- B60R19/48—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects combined with, or convertible into, other devices or objects, e.g. bumpers combined with road brushes, bumpers convertible into beds
- B60R2019/486—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects combined with, or convertible into, other devices or objects, e.g. bumpers combined with road brushes, bumpers convertible into beds with air passages, e.g. for cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R2021/0002—Type of accident
- B60R2021/0009—Oblique collision
Abstract
Description
ABSORBEUR DE CHOCS POUR VEHICULEABSORBER FOR SHOCK FOR VEHICLE
La présente invention concerne un absorbeur de chocs pour véhicule. The present invention relates to a shock absorber for a vehicle.
L'invention trouve une application particulièrement avantageuse dans le domaine de l'industrie automobile. The invention finds a particularly advantageous application in the field of the automotive industry.
Les absorbeurs de chocs pour véhicule peuvent comporter deux types 5 différents d'éléments absorbeurs. The vehicle crash absorbers may have two different types of absorber members.
Les éléments absorbeurs dits chocs faibles sont constitués par un pare-choc en matériau de synthèse. Ils présentent en général un contour définissant une zone de contact aux chocs. The weak shock absorbing elements are constituted by a bumper synthetic material. They generally have a contour defining a shock contact zone.
Les éléments absorbeurs dits chocs forts sont formés d'éléments en io tôle. Les éléments absorbeurs chocs forts sont le plus souvent interposés entre les longerons de la structure du véhicule et les éléments absorbeurs chocs faibles . The strong shock absorber elements are formed of sheet metal elements. The strong shock absorbing elements are most often interposed between the longitudinal members of the vehicle structure and the weak shock absorbing elements.
Cependant, ces absorbeurs de chocs connus ne présentent pas une isotropie satisfaisante vis à vis des différentes incidences d'impact, au sens où le comportement en terme de résistance de ces absorbeurs varie en fonction de l'angle d'incidence du choc. However, these known shock absorbers do not have a satisfactory isotropy with respect to the different impacts of impact, in the sense that the behavior in terms of resistance of these absorbers varies as a function of the angle of impact incidence.
C'est donc un but de l'invention de proposer un absorbeur de chocs pour véhicule qui permettrait d'assurer une résistance aux chocs isotrope, indépendante de l'incidence des chocs, de manière à éviter des zones et des angles d'impact pour lesquels l'absorption des chocs serait moindre. It is therefore an object of the invention to provide a vehicle shock absorber that would provide isotropic impact resistance, independent of the impact of shocks, so as to avoid areas and angles of impact for which shock absorption would be less.
Ce but est atteint, conformément à l'invention, par un absorbeur de chocs pour véhicule, comprenant au moins un élément absorbeur présentant un contour définissant une zone de contact aux chocs, remarquable en ce que ledit élément a.bsorbeur comporte: - une zone d'absorption périphérique, formée de nervures longitudinales, disposées sensiblement parallèlement au contour de 5 l'élément absorbeur, - une zone d'absorption intérieure, formée de nervures transversales, disposées sensiblement perpendiculairement au contour de l'élément absorbeur. This object is achieved, according to the invention, by a vehicle shock absorber, comprising at least one absorber element having a contour defining a shock contact zone, characterized in that said absorber element comprises: - a zone peripheral absorption device, formed of longitudinal ribs, disposed substantially parallel to the contour of the absorber element, - an inner absorption zone, formed of transverse ribs, disposed substantially perpendicularly to the contour of the absorber element.
On comprend alors que, quelle que soit la forme du contour de t 0 l'absorbeur, la zone d'absorption périphérique et la zone d'absorption intérieure présentent une capacité d'absorption quasi identique pour toutes les incidences de chocs. En particulier, si le contour de l'absorbeur affecte une forme sensiblement circulaire, les nervures longitudinales de la zone d'absorption périphérique seront des arcs concentriques, tandis que les nervures transversales de la zone d'absorption intérieure seront portées par des rayons selon une disposition en éventail. It is understood that, whatever the shape of the contour of t 0 the absorber, the peripheral absorption zone and the inner absorption zone have a virtually identical absorption capacity for all impact impacts. In particular, if the contour of the absorber affects a substantially circular shape, the longitudinal ribs of the peripheral absorption zone will be concentric arcs, while the transverse ribs of the inner absorption zone will be borne by radii according to a fan layout.
D'une manière générale, la zone d'absorption périphérique constitue un absorbeur élastique du type chocs faibles et la zone d'absorption intérieure un absorbeur du type chocs forts , des nervures transversales à la zone de contact, c'est-à-dire dans l'axe d'un choc, présentant une plus grande résistance que des nervures longitudinales, perpendiculaires aux chocs. In general, the peripheral absorption zone constitutes an elastic absorber of the low-impact type and the inner absorption zone a strong shock-type absorber, ribs transverse to the contact zone, that is to say in the axis of a shock, having a greater resistance than longitudinal ribs, perpendicular to the shocks.
Un avantage de l'absorbeur de chocs conforme à l'invention est que les 25 zones d'absorption périphérique et intérieure peuvent être réalisées de manière à ne former qu'une pièce unique pour l'élément absorbeur au lieu d'une pluralité de pièces comme pour les absorbeurs connus mentionnés plus haut. An advantage of the shock absorber according to the invention is that the peripheral and inner absorption zones can be made to form a single piece for the absorber element instead of a plurality of parts. as for the known absorbers mentioned above.
En particulier, l'invention prévoit que l'élément absorbeur est réalisé par extrusion-soufflage, notamment de polypropylène. In particular, the invention provides that the absorber element is made by extrusion blow molding, in particular polypropylene.
Cette constitution de l'élément absorbeur en une seule pièce offre la possibilité d'assembler plusieurs éléments absorbeurs pour constituer un absorbeur unique. C'est le cas lorsque l'absorbeur conforme à l'invention comporte deux éléments absorbeurs accolés. Cette disposition est particulièrement avantageuse si l'on veut aménager un to passage d'air à travers l'absorbeur. A cette fin, chaque élément absorbeur présente une découpe dans ladite zone de contact, et les découpes des éléments absorbeurs sont disposées en regard. This constitution of the absorber element in one piece offers the possibility of assembling several absorber elements to form a single absorber. This is the case when the absorber according to the invention comprises two contiguous absorber elements. This arrangement is particularly advantageous if one wants to arrange a to passage of air through the absorber. For this purpose, each absorber element has a cutout in said contact zone, and the cutouts of the absorber elements are arranged facing each other.
Enfin, un montage particulièrement efficace de l'absorbeur selon l'invention dans le véhicule peut être obtenu du fait que ledit absorbeur est fixé dans le véhicule en des points de fixation distribués le long de la zone d'absorption intérieure, sensiblement parallèlement audit contour. Finally, a particularly effective mounting of the absorber according to the invention in the vehicle can be obtained because said absorber is fixed in the vehicle at attachment points distributed along the inner absorption zone, substantially parallel to said contour .
Selon un mode de réalisation de l'invention, l'absorbeur est fixé dans le véhicule par boulonnage, ce qui facilite le remplacement de l'absorbeur 20 lorsque cela est nécessaire. According to one embodiment of the invention, the absorber is fixed in the vehicle by bolting, which facilitates the replacement of the absorber 20 when necessary.
La description qui va suivre en regard des dessins annexés, donnés à titre d'exemples non limitatifs, fera bien comprendre en quoi consiste l'invention et comment elle peut être réalisée. The following description with reference to the accompanying drawings, given as non-limiting examples, will make it clear what the invention consists of and how it can be achieved.
La figure la est une vue de face d'un véhicule équipé d'un absorbeur 25 de chocs conforme à l'invention. Figure la is a front view of a vehicle equipped with a shock absorber according to the invention.
La figure lb est une vue de dessus de la figure la. Figure lb is a top view of Figure la.
La figure le est une vue de dessous de la figure la. Figure 1a is a view from below of Figure la.
La figure ld est une vue en coupe selon l'axe X-X de la figure lc. Figure 1d is a sectional view along the X-X axis of Figure lc.
Sur l'ensemble des figures la à ld est représenté un absorbeur 10 de chocs constitué de deux éléments absorbeurs 110, 120 accolés l'un à l'autre. Chaque élément absorbeur est délimité par un contour extérieur 111, 121 définissant une zone 112, 122 de contact sur laquelle s'effectuent l'impact lors d'un choc avec un objet quelconque venant percuter le véhicule. In all of Figures la to ld is shown a shock absorber 10 consisting of two absorber elements 110, 120 contiguous to one another. Each absorber element is delimited by an outer contour 111, 121 defining a contact zone 112, 122 on which the impact is made during an impact with any object coming from the vehicle.
Les éléments 110, 120 sont composés respectivement, d'une part, to d'une zone 113, 123 d'absorption périphérique formée de nervures longitudinales 1131, 1231 disposées sensiblement parallèlement au contour 111, 121 associé, et, d'autre part, d'une zone 114, 124 d'absorption intérieure formée de nervures transversales 1141, 1241 disposées sensiblement perpendiculairement au contour 111, 121. The elements 110, 120 are respectively composed, on the one hand, of a peripheral absorption zone 113, 123 formed of longitudinal ribs 1131, 1231 arranged substantially parallel to the associated contour 111, 121, and, on the other hand, an inner absorption zone 114, 124 formed of transverse ribs 1141, 1241 disposed substantially perpendicular to the contour 111, 121.
Dans le mode de réalisation des figures la à ld, le contour 111, 121 des éléments absorbeurs 110, 120 est proche d'un demi-cercle, de sorte que les nervures longitudinales 1131, 1231 ont une forme voisine d'arcs de cercle alors que les nervures 1141, 1241 transversales sont disposées radialement en éventail. Le centre de cette structure est le sabot 11 rassemblant les deux longerons 12, 13 du châssis du véhicule. In the embodiment of FIGS. 1a-1d, the contour 111, 121 of the absorber elements 110, 120 is close to a semicircle, so that the longitudinal ribs 1131, 1231 have a shape close to arcs of a circle then that the transverse ribs 1141, 1241 are arranged radially fan. The center of this structure is the shoe 11 gathering the two longitudinal members 12, 13 of the chassis of the vehicle.
Cette configuration de nervures assure à l'absorbeur 10 de chocs une bonne efficacité d'absorption vis-à-vis de l'incidence variable des chocs possibles, grâce à l'isotropie résultant de la symétrie globale de l'absorbeur 10 autour du sabot 11. This rib configuration provides the shock absorber with good absorption efficiency with respect to the variable incidence of possible shocks, due to the isotropy resulting from the overall symmetry of the absorber around the shoe. 11.
Les zones 113, 123 d'absorption périphérique sont destinées à absorber des chocs faibles à la manière des pare-choc équipant habituellement les véhicules automobiles. Elles peuvent se déformer élastiquement en cas de choc à une vitesse de rencontre généralement inférieure ou égale à 25 km/h, moteur au point mort, contre une masse comprise entre 40 et 80 kg. Au-delà de ces valeurs, ces zones périphériques se déforment plastiquement. The areas 113, 123 of peripheral absorption are designed to absorb low shocks in the manner of bumpers usually fitted to motor vehicles. They can deform elastically in case of impact at a speed of meeting generally less than or equal to 25 km / h, engine in neutral, against a mass of between 40 and 80 kg. Beyond these values, these peripheral zones deform plastically.
Les zones 114, 124 intérieures sont des zones de chocs forts , les nervures radiales 1141, 1241 présentant une plus grande résistance mécanique que les nervures longitudinales 1131, 1231. Dans ces zones, l'absorption est obtenue par déformation de la structure. The inner zones 114, 124 are zones of strong impact, the radial ribs 1141, 1241 having a greater mechanical strength than the longitudinal ribs 1131, 1231. In these zones, the absorption is obtained by deformation of the structure.
Chaque élément absorbeur 110, 120 est fabriqué en une seule pièce par extrusion-soufflage de polypropylène, ce matériau présentant l'avantage d'être résistant à la corrosion par l'eau et les solvants automobiles. Le coût de ces éléments est donc considérablement réduit par comparaison aux modes de réalisation traditionnels mettant en oeuvre des opérations d'emboutissage, de soudure et de traitement anti-corrosion. Each absorber element 110, 120 is manufactured in one piece by polypropylene extrusion blow molding, this material has the advantage of being resistant to corrosion by water and automotive solvents. The cost of these elements is therefore considerably reduced compared to traditional embodiments involving stamping, welding and anti-corrosion treatment operations.
Les éléments absorbeurs 110, 120 constituant chacun un volume étanche, ils peuvent éventuellement être remplis de mousse élastique afin d'améliorer encore les performances aux chocs. The absorber elements 110, 120 each constituting a sealed volume, they may optionally be filled with elastic foam to further improve the impact performance.
On peut voir plus particulièrement sur les figures la et lb que les éléments absorbeurs 110, 120 sont accolés suivant un plan d'assemblage parallèle au sol, ce qui perturbe au minimum l'isotropie recherchée. In particular, it can be seen in FIGS. 1a and 1b that the absorber elements 110, 120 are contiguous along an assembly plane parallel to the ground, which disturbs at least the desired isotropy.
Comme le montre la figure la, un canal 14 de passage d'air de refroidissement est constitué par deux découpes 115, 125 réalisées dans les zones de contact des éléments absorbeurs 110,120 et disposées en regard l'une de l'autre. As shown in Figure la, a channel 14 for cooling air passage is constituted by two cutouts 115, 125 made in the contact areas of the absorber elements 110,120 and disposed opposite one another.
Chaque élément absorbeur 110, 120 de l'absorbeur 10 est fixé dans le véhicule en des points 116, 126 de fixation distribués le long de la zone 114, 124 d'absorption intérieure respective, sensiblement parallèlement audit contour 111, 121. Each absorber element 110, 120 of the absorber 10 is fixed in the vehicle at attachment points 116, 126 distributed along the respective inner absorption zone 114, 124 substantially parallel to said contour 111, 121.
La forme en demi-cercle de la fixation obtenue permet de mieux répartir l'énergie cinétique en cas de choc. The semicircular shape of the fixation obtained makes it possible to better distribute the kinetic energy in the event of an impact.
L'assemblage aux longerons 12, 13 est réalisée par boulonnage, I o facilitant ainsi le remplacement des éléments absorbeurs 110, 120 après un choc dépassant le seuil élastique. The assembly to the longitudinal members 12, 13 is made by bolting, I o thus facilitating the replacement of the absorber elements 110, 120 after a shock exceeding the elastic threshold.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0452708A FR2878208B1 (en) | 2004-11-22 | 2004-11-22 | ABSORBER FOR SHOCK FOR VEHICLE |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0452708A FR2878208B1 (en) | 2004-11-22 | 2004-11-22 | ABSORBER FOR SHOCK FOR VEHICLE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2878208A1 true FR2878208A1 (en) | 2006-05-26 |
| FR2878208B1 FR2878208B1 (en) | 2007-03-09 |
Family
ID=34953965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR0452708A Expired - Fee Related FR2878208B1 (en) | 2004-11-22 | 2004-11-22 | ABSORBER FOR SHOCK FOR VEHICLE |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2878208B1 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5799991A (en) * | 1996-10-23 | 1998-09-01 | Concept Analysis Corporation | Molded bumper system with reinforcement beam |
| EP1072477A1 (en) * | 1998-04-24 | 2001-01-31 | Fundaciò Ascamm Centre Tecnològic | Bumpers for motor vehicles |
-
2004
- 2004-11-22 FR FR0452708A patent/FR2878208B1/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5799991A (en) * | 1996-10-23 | 1998-09-01 | Concept Analysis Corporation | Molded bumper system with reinforcement beam |
| EP1072477A1 (en) * | 1998-04-24 | 2001-01-31 | Fundaciò Ascamm Centre Tecnològic | Bumpers for motor vehicles |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2878208B1 (en) | 2007-03-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |
Effective date: 20150731 |