FR2599309A1 - Front axle assembly suspension for a motor vehicle - Google Patents

Front axle assembly suspension for a motor vehicle Download PDF

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Publication number
FR2599309A1
FR2599309A1 FR8607781A FR8607781A FR2599309A1 FR 2599309 A1 FR2599309 A1 FR 2599309A1 FR 8607781 A FR8607781 A FR 8607781A FR 8607781 A FR8607781 A FR 8607781A FR 2599309 A1 FR2599309 A1 FR 2599309A1
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FR
France
Prior art keywords
cylinder
front axle
spheres
stub axle
conduit
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
Application number
FR8607781A
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French (fr)
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FR2599309B1 (en
Inventor
Francois Mounier Poulat
Serge Guillet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Renault Trucks SAS
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Renault Vehicules Industriels SA
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Priority to FR8607781A priority Critical patent/FR2599309B1/en
Publication of FR2599309A1 publication Critical patent/FR2599309A1/en
Application granted granted Critical
Publication of FR2599309B1 publication Critical patent/FR2599309B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • B60G15/08—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having fluid spring
    • B60G15/12—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having fluid spring and fluid damper
    • B60G15/14—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having fluid spring and fluid damper the damper being connected to the stub axle and the spring being arranged around the damper
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
    • F16F9/08—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where gas is in a chamber with a flexible wall
    • F16F9/096—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where gas is in a chamber with a flexible wall comprising a hydropneumatic accumulator of the membrane type provided on the upper or the lower end of a damper or separately from or laterally on the damper

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

Front axle assembly for a motor vehicle of the MacPherson type comprising at least one integral oleopneumatic element. The base of the cylinder 4 of a strut is fitted into the top part of the stub axle holder 1, the top of the piston of which strut is connected by a ball joint to the body, at least one oleopneumatic suspension sphere 5 being fixed to the stub axle holder, near to where it is fitted around the cylinder 4, with which it communicates via a feed duct, comprising seals at its periphery. Application to suspensions.

Description

TRAIN AVANT DE SUSPENSION POUR VEHICULE AUTOMOBILE. FRONT SUSPENSION TRAIN FOR MOTOR VEHICLE.

La présente invention se rapporte à un train avant de type Mac Pherson pour suspension de véhicule automobile, et plus particulièrement de ceux qui comprennent des éléments oléopneumatiques élastiques intégrés constitués par des sphères contenant du gaz sous pression. Ces dernières ont pour but d' équilibrer la charge au sol des roues ; de plus une alimentation ou une évacuation d' une partie de 1' huile contenu dans ces dispositifs permet de modifier 1' assiette du véhicule.The present invention relates to a front axle of the Mac Pherson type for the suspension of a motor vehicle, and more particularly to those which comprise integrated elastic oleopneumatic elements constituted by spheres containing gas under pressure. The latter are intended to balance the ground load of the wheels; moreover a supply or evacuation of part of the oil contained in these devices makes it possible to modify the attitude of the vehicle.

On connaît déXà de tels systèmes selon lesquels des sphères communiquent directement, ou indirectement par 1' intermédiaire d' une canalisation hydraulique de gros diamètre, avec la partie supérieure de la jambe de force.We already know of such systems according to which spheres communicate directly, or indirectly by means of a large diameter hydraulic pipe, with the upper part of the strut.

Cette disposition présente 1' inconvénient de posséder un encombrement important dans une zône critique du véhicule.This arrangement has the disadvantage of having a large size in a critical area of the vehicle.

L' objet de l'invention a pour but de pallier la difficulté précédente en libérant la zone ci-dessus et en agençant les sphères de la suspension sur le porte-fusée de la roue, à des emplacements disponibles. The object of the invention is to overcome the above difficulty by freeing up the above area and by arranging the spheres of the suspension on the stub axle of the wheel, in available locations.

L'invention sera maintenant décrite à titre d' exemples non limitatifs au regard des figures 1 à 8 ci-lointes, qui se rapportent respectivement - la figure 1, à une coupe selon un plan vertical et transversal au
véhicule d' un train avant selon 1' art antérieur, - la figure 2, à une vue analogue montrant le détail d' une variante de la
disposition précédente, - la figure 3, à une vue analogue à la figure 1 de la réalisation selon
1' invention, - les figures 4 à 8, des vues analogues montrant les détails de variantes
de 1' invention.The invention will now be described by way of nonlimiting examples with regard to Figures 1 to 8 below, which relate respectively - Figure 1, to a section along a vertical plane and transverse to
vehicle of a front axle according to the prior art, FIG. 2, in a similar view showing the detail of a variant of the
previous arrangement, - Figure 3, in a view similar to Figure 1 of the embodiment according to
1 invention, - Figures 4 to 8, similar views showing the details of variants
of the invention.

Les figures 1 et 2 montrent un train avant de l'art antérieur et du type
Mac Pherson.Figures 1 and 2 show a front axle of the prior art and of the type
Mac Pherson.

Une roue 7 est solidaire d' un porte-fusée 1 constitué d' un corps rigide dans lequel est emmanché le cylindre 4 d' une jambe de force qui peut coulisser et tourner librement autour d'un piston 2 relié au châssis 8 par une rotule 9. Un fluide incompressible est contenu dans le volume intérieur du cylindre 4 et du piston 2 ainsi que dans une ou plusieurs sphères oléopneumatiques 5 prégonflées avec un gaz inerte disposé de
I' autre côté d1 une membrane 6. La charge au sol est équilibrée par la pression de gaz contenue dans les sphères 5. L' alimentation ou
Il évacuation d' une partie de 1' huile selon des réalisations connues en soi permet de modifier l'assiette du véhicule.A wheel 7 is integral with a stub axle 1 consisting of a rigid body in which is fitted the cylinder 4 with a strut which can slide and rotate freely around a piston 2 connected to the chassis 8 by a ball joint 9. An incompressible fluid is contained in the internal volume of the cylinder 4 and of the piston 2 as well as in one or more oleopneumatic spheres 5 pre-inflated with an inert gas disposed of
The other side of a membrane 6. The load on the ground is balanced by the gas pressure contained in the spheres 5. The supply or
It evacuation of a part of the oil according to embodiments known per se makes it possible to modify the attitude of the vehicle.

Les sphères 5 peuvent soit être directement reliées à la partie supérieure du piston 2 (figure 2) soit par 1' intermédiaire d' une canalisation hydraulique 3 de gros diamètre pour ne pas freiner inconsidérément le débit de liquide pendant le débattement de la suspension (figure 1).The spheres 5 can either be directly connected to the upper part of the piston 2 (FIG. 2) or by the intermediary of a hydraulic pipe 3 of large diameter so as not to unduly brake the flow of liquid during the movement of the suspension (FIG. 1).

Dans les deux cas on notera 1' encombrement de la zône critique correspondante du véhicule.In both cases, note the size of the corresponding critical area of the vehicle.

Des moyens habituels de laminage du fluide non représentés sont prévus dans la jambe de force pour absorber le maximum d' énergie résultant des mouvements de la roue 7.Usual means for rolling the fluid, not shown, are provided in the strut to absorb the maximum of energy resulting from the movements of the wheel 7.

Selon une des réalisations de 1' invention représentée à la figure 3, on retrouve la roue 7 fixée au porte-fusée 1, dans lequel est emmanché la base du cylindre 4 de la lambe de force, tandis que son piston 2 est relié par la rotule 9 à la caisse 8. Mais, contrairement aux figures 1 et 2, les sphères 5 de suspension sont supportées directement par le corps du porte-fusée 1. Leur solidarisation peut être effectuée par vissage, un conduit d'alimentation 10 de la sphère 5 en liquide hydraulique en provenance de la cambre de force est aménagé à la base du cylindre 4 un fourreau 11 comportant des loints toriques 12 assure 1' étanchéité de
I' ensemble précédent.According to one of the embodiments of the invention shown in FIG. 3, we find the wheel 7 fixed to the stub axle 1, in which the base of the cylinder 4 of the force flange is fitted, while its piston 2 is connected by the ball 9 to the body 8. But, unlike Figures 1 and 2, the suspension spheres 5 are supported directly by the body of the stub axle 1. Their connection can be effected by screwing, a supply pipe 10 of the sphere 5 in hydraulic fluid coming from the force camber is fitted at the base of the cylinder 4 a sheath 11 comprising toric farts 12 ensures the sealing of
The previous set.

La variante de la figure 5 illustre le montage de 2 sphères de suspension superposées 5' et 5". Celles-ci sont vissées sur le corps du porte-fusée.The variant of FIG. 5 illustrates the mounting of 2 superimposed suspension spheres 5 ′ and 5 ". These are screwed onto the body of the stub axle.

La liaison hydraulique entre les sphères se fait par un conduit 20 qui débouche d'un côté sur le conduit d'alimentation 10 et est rendu étanche par un bouchon 21 situé à son extrémité opposée.The hydraulic connection between the spheres is made by a conduit 20 which opens on one side on the supply conduit 10 and is sealed by a plug 21 located at its opposite end.

On remarquera la présence de systèmes amortisseurs 22 disposés à
I' entrée des sphères 5'-5" et comportant des ouvertures calibrées 23 destinées à freiner les débits de liquide hydraulique.Note the presence of damping systems 22 arranged at
I 'entry of the spheres 5'-5 "and having calibrated openings 23 intended to slow the flow of hydraulic fluid.

Toutefois, cette disposition peut entraîner une augmentation importante de la température de 1' huile à l'intérieur des sphères 5' -5", nuisible à la durée de vie des membranes 6. Selon la variante de la figure 6, on incorpore dans le fourreau 11 le système amortisseur 22. De plus, on remplace le bouchon 21 par un organe 24 qui autorise une fuite contrôlée permettant un certain renouvellement de 1' huile contenue dans la jambe de force et le maintien de sa température en deça du seuil critique de détérioration de la membrane 6.However, this arrangement can lead to a significant increase in the temperature of the oil inside the spheres 5 ′ -5 ″, detrimental to the life of the membranes 6. According to the variant of FIG. 6, it is incorporated into the sheath 11 the damping system 22. In addition, the plug 21 is replaced by a member 24 which authorizes a controlled leak allowing a certain renewal of the oil contained in the strut and the maintenance of its temperature below the critical threshold of deterioration of the membrane 6.

On voit à la figure 3 de 1' ensemble du train arrière selon l'invention que
I' alimentation en fluide s' effectue par la canalisation 25 située à la partie supérieure de la lambe de force, tandis que son évacuation se produit à sa partie inférieure par la canalisation 26.It can be seen in FIG. 3 of the rear axle assembly according to the invention that
The fluid supply takes place via the pipe 25 located at the top of the force flap, while its evacuation occurs at its bottom via the pipe 26.

L' organe 24 peut être un régulateur de débit assurant un débit permanent préréglé, ou un régulateur de débit thermosensible soit par pilotage électrique soit par commande avec bilame ou matériaux à mémoire de forme.  The member 24 can be a flow regulator ensuring a preset permanent flow, or a thermosensitive flow regulator either by electrical control or by control with bimetallic strip or shape memory materials.

Dans la variante de la figure 7, la différence par rapport aux réalisations precédentes se situe au niveau de 1' étanchéité effectuée entre le cylindre 4 et le porte-fusée 1. Celle-ci se fait par deux loints toriques 30 disposés de part et d'autre des conduits 31-32 qui se font face, respectivement aménagés dans le cylindre 4 et le porte-fusée 1. Une gorge périphérique 33 intermédiaire est prévue dans 1' un ou 1' autre des éléments précédents, ce qui permet de ne pas imposer une coincidence absolue les conduits 31-32, absorbant de ce fait les tolérances de fabrication.In the variant of FIG. 7, the difference with respect to the previous embodiments is situated at the level of the seal effected between the cylinder 4 and the stub axle 1. This is done by two toroidal outlets 30 arranged on either side 'other of the conduits 31-32 which face each other, respectively arranged in the cylinder 4 and the stub axle 1. An intermediate peripheral groove 33 is provided in one or the other of the preceding elements, which makes it possible not to impose absolute coincidence on the conduits 31-32, thereby absorbing manufacturing tolerances.

Selon la variante de la figure 8, les sphères 5'-5" et leur conduit de communication 20 sont disposés sur un bloc intermédiaire 40, ultérieurement rapporté sur le porte-fusée 1 ; cette configuration permet de simplifier le dessin de ce dernier et donc d' en améliorer le prix de revient.  According to the variant of FIG. 8, the spheres 5'-5 "and their communication conduit 20 are arranged on an intermediate block 40, subsequently attached to the stub axle 1; this configuration makes it possible to simplify the design of the latter and therefore to improve the cost price.

Claims (5)

REVENDlCAONSSALES 1. Train avant de. véhicule automobile du type Mac Pherson comprenant au moins un élément oléopneumatique intégré, caractérisé par le fait qu' à la partie supérieure du porte-fusée (I) est emmanchée la base du cylindre (4) dtune jambe de force, dont le sommet du piston est relié par une rotule à la caisse, au moins une sphère de suspension oléopneumatique (5) étant fixée au porte-fusée, au niveau de son emmanchement autour du cylindre (4), avec lequel elle communique par un conduit d' alimentation (10), comportant à sa périphérie des loints d'étanchéité (12).1. Front axle of. motor vehicle of the Mac Pherson type comprising at least one integrated oleopneumatic element, characterized in that at the upper part of the stub axle (I) is fitted the base of the cylinder (4) of a strut, including the top of the piston is connected by a ball joint to the body, at least one oleopneumatic suspension sphere (5) being fixed to the stub axle, at its fitting around the cylinder (4), with which it communicates by a supply duct (10 ), comprising at its periphery sealing distances (12). 2. Train avant selon la revendication 1, caractérisé en ce que le porte-fusée (1) supporte deux sphères de suspension (5'-5") réunies par un conduit (20) dont l'extrémité supérieure est fermée par un bouchon (21) tandis que 1' extrémité inférieure débouche dans le conduit d'alimentation (10) communiquant avec le cylindre (4), un amortisseur (22) étant disposé à 1' entrée de chacune des sphères (5' -5").2. Front axle according to claim 1, characterized in that the stub axle (1) supports two suspension spheres (5'-5 ") joined by a conduit (20) whose upper end is closed by a plug ( 21) while the lower end opens into the supply duct (10) communicating with the cylinder (4), a damper (22) being arranged at the entrance of each of the spheres (5 '-5 "). 3. Train avant selon la revendication 1, caractérisé en ce que le porte-fusée (I) supporte deux sphères de suspension - (5' -5") réunies par un conduit (20) communiquant avec le cylindre (4) par l'intermédiaire du conduit d' alimentation (10) et du fourreau (11) qui comporte un amortisseur (22).3. Front axle according to claim 1, characterized in that the stub axle (I) supports two suspension spheres - (5 '-5 ") joined by a conduit (20) communicating with the cylinder (4) by the intermediate the supply duct (10) and the sleeve (11) which comprises a damper (22). 4. Train avant selon la revendication 1, caractérisé en ce que la communication entre le cylindre (4) et le conduit (20) du porte-fusée (1) est effectuée au moyen de deux conduits (31-32) et qui sont ménagés respectivement dans le premier et le second de ces éléments, I' un d' entre eux étant pourvu d' une gorge périphérique (33) intermédiaire bordée de part et d' autre par des joints toriques (30). 4. Front axle according to claim 1, characterized in that the communication between the cylinder (4) and the conduit (20) of the stub axle (1) is effected by means of two conduits (31-32) and which are arranged respectively in the first and the second of these elements, one of them being provided with an intermediate peripheral groove (33) bordered on either side by O-rings (30). 5. Train avant selon la revendication 1, caractérisé en ce que les sphères (5'-5") et leur conduit de communication (20) sont disposés sur un bloc intermédiaire (40) ultérieurement rapporté sur le porte-fusée (1). 5. Front axle according to claim 1, characterized in that the spheres (5'-5 ") and their communication conduit (20) are arranged on an intermediate block (40) subsequently attached to the rocket carrier (1).
FR8607781A 1986-05-30 1986-05-30 FRONT SUSPENSION TRAIN FOR MOTOR VEHICLE Expired - Lifetime FR2599309B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8607781A FR2599309B1 (en) 1986-05-30 1986-05-30 FRONT SUSPENSION TRAIN FOR MOTOR VEHICLE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8607781A FR2599309B1 (en) 1986-05-30 1986-05-30 FRONT SUSPENSION TRAIN FOR MOTOR VEHICLE

Publications (2)

Publication Number Publication Date
FR2599309A1 true FR2599309A1 (en) 1987-12-04
FR2599309B1 FR2599309B1 (en) 1990-07-20

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FR8607781A Expired - Lifetime FR2599309B1 (en) 1986-05-30 1986-05-30 FRONT SUSPENSION TRAIN FOR MOTOR VEHICLE

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4104239A1 (en) * 1990-11-12 1992-05-14 Huebner Gummi & Kunststoff Folding passageway between two carriages of high speed train - makes use of interpositioned hoses inflatable according to travelling speed
FR2703744A1 (en) * 1993-04-08 1994-10-14 Fichtel & Sachs Ag Suspension damper acting selectively according to the frequency of the oscillations.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3149831A (en) * 1962-06-12 1964-09-22 Sferma Soc Fr D Entretien Et D Damped hydraulic suspension
FR1543415A (en) * 1967-09-12 1968-10-25 Peugeot Advanced vehicle suspension
DE2915489A1 (en) * 1978-04-17 1979-10-25 Kayaba Industry Co Ltd FRONT SHOCK ABSORBER DEVICE FOR WHEELED VEHICLES

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3149831A (en) * 1962-06-12 1964-09-22 Sferma Soc Fr D Entretien Et D Damped hydraulic suspension
FR1543415A (en) * 1967-09-12 1968-10-25 Peugeot Advanced vehicle suspension
DE2915489A1 (en) * 1978-04-17 1979-10-25 Kayaba Industry Co Ltd FRONT SHOCK ABSORBER DEVICE FOR WHEELED VEHICLES

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4104239A1 (en) * 1990-11-12 1992-05-14 Huebner Gummi & Kunststoff Folding passageway between two carriages of high speed train - makes use of interpositioned hoses inflatable according to travelling speed
FR2703744A1 (en) * 1993-04-08 1994-10-14 Fichtel & Sachs Ag Suspension damper acting selectively according to the frequency of the oscillations.

Also Published As

Publication number Publication date
FR2599309B1 (en) 1990-07-20

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