FR2584026A1 - Double chassis device with variable ground clearance with compensation for the centrifugal and cambering effects - Google Patents

Double chassis device with variable ground clearance with compensation for the centrifugal and cambering effects Download PDF

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Publication number
FR2584026A1
FR2584026A1 FR8501989A FR8501989A FR2584026A1 FR 2584026 A1 FR2584026 A1 FR 2584026A1 FR 8501989 A FR8501989 A FR 8501989A FR 8501989 A FR8501989 A FR 8501989A FR 2584026 A1 FR2584026 A1 FR 2584026A1
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chassis
ground clearance
cylinders
hydraulic
taken
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FR8501989A
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French (fr)
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FR2584026B1 (en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G99/00—Subject matter not provided for in other groups of this subclass
    • B60G99/008—Other suspension arrangements with fluid springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/019—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the type of sensor or the arrangement thereof
    • B60G17/01908—Acceleration or inclination sensors

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

Abstract

The invention relates to a device facilitating the achievement of a four-wheel drive motor vehicle genuinely suitable for all terrain. It comprises two chassis connected to one another by hydraulic jacks fed by a conventional hydraulic pump, which provide for variation of the ground clearance and the position of the upper chassis. The hydraulic circuit comprises a cambering effect compensator which keeps the upper chassis horizontal by means of an oscillator fixed on the lower chassis and a centrifugal effect compensator which compensates for the centrifugal effect when cornering by raising the outer jacks on the bend. The double shaft transmissions are lateral and not transversal. The device according to the invention is intended for agriculture, general public use and for military uses.

Description

DESCRIPTION
La présente invention concerne un dispositif de double chassis à garde au sol variable avec compensation des effets centrifuge et de dévers.DESCRIPTION
The present invention relates to a double chassis device with variable ground clearance with compensation for centrifugal and tilt effects.

Ce dispositif permet d'obtenir un véhicule automobile, à quatre roues motrices réellement adapté à tous les terrains. This device makes it possible to obtain a motor vehicle, with four driving wheels really adapted to all terrains.

Les véhicules tout terrain actuels, en plein développement, ne peuvent évoluer à grande vitesse, la garde au sol étant importante, et donc le centre de gravité assez haut, afin de permettre justement d'évoluer en terrain difficile. De plus les ponts transversaux, à garde au sol fixe, sont un handicap sur les terrains meubles ( quand les ponts touchent le sol les roues perdent leur adhérence). Current all-terrain vehicles, in full development, cannot evolve at high speed, the ground clearance being important, and therefore the center of gravity quite high, in order to allow precisely to evolve in difficult terrain. In addition, the transverse bridges, with fixed ground clearance, are a handicap on loose ground (when the bridges touch the ground the wheels lose their grip).

Le dispositif, selon l'invention, permet de remédier à ces inconvénients. Le dispositif comprend : un chassis inférieur, placé à une hauteur correspondant à la garde au sol maximum, et ne descendant qu'à l'aplomb des roues, qui sont fixées sur ce chassis inférieur avec des suspensions à ressort et à amortisseurs classiques. The device according to the invention overcomes these drawbacks. The device includes: a lower chassis, placed at a height corresponding to the maximum ground clearance, and descending only below the wheels, which are fixed to this lower chassis with spring suspensions and conventional shock absorbers.

un chassis supérieur, de forme rectangulaire, sur lequel sont fixées des traverses, en forme de "U", qui descendent à l'intérieur du cha -ssis inférieur, et supportent le moteur, l'embrayage, la boite de vitesse, la pompe hydraulique, les transmissions avant et arriére, les réservoirs et l'ha -bitacle, tous de type classiques. an upper chassis, of rectangular shape, on which are fixed cross-members, in the shape of "U", which descend inside the lower chassis, and support the engine, the clutch, the gearbox, the pump hydraulics, front and rear transmissions, tanks and ha -bitacle, all of the classic type.

une liaison entre les deux chassis assurée par quatre vérins hydrauliques à double éffet, alimentés par la pompe hydraulique, et com -mandés de l'intérieur de l'habitacle. Les vérins sont fixés, à un bout, à côté des roues sur le chassis inférieur, et à l'autre bout, sur les montants latéraux du chassis supérieur. De plus, quatre vérins fixés perpendiculairement aux pré -cédents, à un bout, et au chassis inférieur, à l'autre bout,assurent la posi -tion du chassis supérieur. En position de garde au sol maximum la partie infé -rieure des traverses en "lof' viennent, sous la poussée des vérins sur le chassis supérieur, au niveau du haut du chassis inférieur. En position de garde au sol minimum, les vérins étant rentrés, les deux chassis reposent l'un sur l'autre, et les traverses en "U" se trouvent au ras du sol.Le véhicule, ayant alors un centre de gravité tres bas, peut évoluer à grande vitesse. a connection between the two chassis provided by four double-acting hydraulic cylinders, powered by the hydraulic pump, and controlled from inside the passenger compartment. The cylinders are fixed, at one end, next to the wheels on the lower chassis, and at the other end, on the lateral uprights of the upper chassis. In addition, four cylinders fixed perpendicular to the previous ones, at one end, and to the lower chassis, at the other end, ensure the posi-tion of the upper chassis. In the maximum ground clearance position the lower part of the "lof" crosspieces come, under the thrust of the jacks on the upper chassis, at the top of the lower chassis. In the minimum ground clearance position, the jacks being retracted , the two chassis rest on each other, and the "U" crosspieces are at ground level. The vehicle, then having a very low center of gravity, can move at high speed.

un compensateur de dévers qui est composé d' un oscilla -teur, fixé horizontalement sur le chassis inférieur, commandant un moteur él -ectrique actionnant un distributeur hydraulique double éffet, qui envoie de l'huile dans les deux vérins situés en aval du dévers, proportionnellement à l'importance du dévers, ce qui permet de maintenir le chassis supérieur à l'horizontale, jusqu'à concurrence de la longueur des vérins, et permet donc des passages dans des dévers trés importants. a slope compensator which is made up of an oscillator -tor, fixed horizontally on the lower chassis, controlling an electric motor actuating a double-effect hydraulic distributor, which sends oil into the two cylinders located downstream of the slope, in proportion to the size of the superelevation, which allows the upper chassis to be kept horizontal, up to the length of the jacks, and therefore allows passage through very large superelevations.

un compensateur d'effet centrifuge qui est composé d'un distributeur hydraulique, fixé sur le circuit précédent, à la suite du coipen- -sateur de dévers, comprenant à l'intérieur une masselotte prise entre deux ressorts, qui se déplace sous 1' éffet de la force centrifuge dans les virages et libére ainsi une entrée d'huile, et envoie à son tour de l'huile dans les vérins extérieurs au virage, déplacant ainsi le centre de gravité vers 1 'int- érieur du viragetet assurant une meilleure adhérence permet ainsi une vitesse plus élevée. Ces deux compensateurs peuvent être neutralisés de l'intérieur de l'habitacle, Si nécéseaire.  a centrifugal effect compensator which is composed of a hydraulic distributor, fixed on the preceding circuit, following the superelevation coipensor, comprising inside a counterweight taken between two springs, which moves under 1 ' effect of the centrifugal force in the turns and thus releases an oil entry, and in turn sends oil into the cylinders external to the turn, thus displacing the center of gravity towards the interior of the turner and ensuring better grip thus allows higher speed. These two compensators can be neutralized from inside the passenger compartment, if necessary.

la pompe hydraulique à double étage ( courament utili -sée en agricole ) permet d'assurer la direction, le freinage, l'embrayage,et le fonctionnement des vérins assurant la garde au sol variable et la compensa -tion des effets centrifuge et de dévers. the double-stage hydraulic pump (commonly used in agriculture) provides steering, braking, clutch, and operation of the cylinders ensuring variable ground clearance and compensation for centrifugal and cant effects .

Les ponts avant et arriére étant fixés sur le chassis supérieur, la transmis -ewn du mouvement aux roues sera assurée par des transmissions à cardans laté -raies et non transversales. Il y aura quatre transmissions à cardans et à dou -bles tubes fixées chacune, à un bout, à un renvoi d'angle de sortie de pont et à l'autre bout, à un renvoi d'angle fixé sur le chassis inférieur à coté de chaque roue. Les doubles tubes, glissant l'un dans l'autre, permettent un dépla -cement plus important du chassis supérieur par rapport au chassis inférieur. The front and rear axles being fixed on the upper chassis, the transmission -ewn of movement to the wheels will be ensured by lateral cardanic transmissions -rais and not transverse. There will be four cardan and double-tube transmissions each fixed at one end to a bridge exit angle gear and at the other end to a angle gear fixed to the lower chassis next to it. of each wheel. The double tubes, sliding one inside the other, allow greater displacement of the upper chassis relative to the lower chassis.

Ces tubes étant alignés Nes montants latéraux du chassis inférieur, et trés prés du chassis, cela laisse la voie totalement libre et permet de passer sur des obstacles trés haut et de progresser sur un sol trés meuble.These tubes being aligned with the lateral uprights of the lower chassis, and very close to the chassis, this leaves the path completely free and allows you to pass over very high obstacles and progress on very loose ground.

Toutes les liaisons entre 1' habitacle du chassis supérieur et les organes mécaniques étant assurées par un asservissement hydraulique l'habitacle peut outre parfaitement étanche et le véhicule peut ainsi passer dans l'eau et même sous réserve d'aménagements mineurs flotter. All the connections between the passenger compartment of the upper chassis and the mechanical members being ensured by hydraulic servo-control, the passenger compartment can furthermore be perfectly waterproof and the vehicle can thus pass through the water and even subject to minor modifications to float.

Ce dispositif permet des applications multiples. En agriculture, avec l'intro -duction d'une prise de force hydraulique classique, ce véhicule tout terrain peut servir de deuxième tracteur pour de nombreux travaux agricoles et en même temps remplacer la voiture personnelle de 1 'exploitant, en donnant accés à tous les terrains possibles, ( donc un seul achat, un seul entretien, une seule assurance et plus de services). This device allows multiple applications. In agriculture, with the introduction of a conventional hydraulic power take-off, this all-terrain vehicle can serve as a second tractor for many agricultural jobs and at the same time replace the operator's personal car, giving access to all possible land (therefore a single purchase, a single maintenance, a single insurance and more services).

En grand public, le dispositif rend le véhicule réellement apte à la vitesse avec une adhérence trés importante et une sécurité accrue du fait de la hauteur du chassie enveloppant les passagers et de l'asservissement hydraulique, et en adme temps, le dispositif en fait un véhicule d'évasion maximum grace à son aptitude dans tous les terrains. In general public, the device makes the vehicle really capable of speed with a very large grip and increased safety due to the height of the frame enveloping the passengers and the hydraulic servo, and at the same time, the device makes it a maximum escape vehicle thanks to its ability in all terrains.

Eh utilisation militaire, ce dispositif permet de passer n'importe où, y compris dans l'eau, et également de se rendre trés rapidement sur un point don -né en raison de la vitesse de pointe possible très élevée, ce qui devrait in -teresser beaucoup de pays dont les voies de communications sont de qualités trés diverses.En utilisation sportive, la polyvalence du véhicule en fera un élément gazant pour une course du type Paris-Dakar, ce: qui constituerait un excellent lancement commercial. Eh military use, this device allows to go anywhere, including in the water, and also to get very quickly on a given point due to the very high possible top speed, which should in - teress many countries with very diverse qualities of communication routes. In sporting use, the versatility of the vehicle will make it a gassing element for a Paris-Dakar type race, which would constitute an excellent commercial launch.

Le dispositif peut être réalisé a partir de sous-ensembles déjà existants pour la plupart.  The device can be produced from already existing sub-assemblies for the most part.

Claims (8)

REVENDIGATIONS 1) Dispositif du double chassis à garde au sol variable avec compensation des effets centrifuges et de dévers caractérisé en ce qu'il comporte deux chassis reliés entre eux par des vérins hydrauliques, alimentés par une pompe hydrauli -que, un oscillateur fixé sur le chassis inférieur, qui maintient le chassis supérieur horizontal dans les dévers, un compensateur d'effet centrifuge qui corrige l'effet centrifuge dans les virages.1) Device of the double chassis with variable ground clearance with compensation for centrifugal and cant effects, characterized in that it comprises two chassis connected together by hydraulic cylinders, powered by a hydraulic pump, an oscillator fixed on the chassis lower, which keeps the upper chassis horizontal in the slopes, a centrifugal effect compensator which corrects the centrifugal effect when cornering. 2) Dispositif selon la revendication 1 caractérisé en ce que le chassis in -férieur est placé à une hauteur correspondant à la garde au sol maximum et ne descend qu'à l'aplomb des roues qui y sont fixées.2) Device according to claim 1 characterized in that the in-lower chassis is placed at a height corresponding to the maximum ground clearance and descends only directly above the wheels which are fixed there. 3) Dispositif selon la revendication 1 caractérisé en ce que le chassis supé -rieur est pourvu de traverses en "' descendant au niveau de garde au sol minimum à l'intérieur du chassis inférieur et supportant les éléments mécaniques ( moteur, embrayage, transmissions, pompe hydraulique, réservoirs et habitacle classiques.)3) Device according to claim 1 characterized in that the upper chassis -rieur is provided with crosspieces "down to the minimum ground clearance inside the lower chassis and supporting the mechanical elements (engine, clutch, transmissions, hydraulic pump, conventional tanks and passenger compartment.) 4) Dispositif selon les revendications précédentes prises dans leur ensemble caractérisé en ce que quatre vérins hydrauliques assurent la variation de la garde au sol en soulevant le chassis supérieur par rapport au chassis inférieur et que quatre autres vérins assurent la position des vérins précédents dans leur mouvement transversal , ces vérins étant commandés par un distributeur hydraulique situé dans l'habitacle.4) Device according to the preceding claims taken as a whole characterized in that four hydraulic cylinders ensure the variation of the ground clearance by lifting the upper chassis relative to the lower chassis and that four other cylinders ensure the position of the previous cylinders in their movement transverse, these jacks being controlled by a hydraulic distributor located in the passenger compartment. 5) Dispositif selon les revendications précédentes prises dans leur ensemble caractérisé en ce que l'oscillateur commande un moteur éléctrique actionnant un distributeur hydraulique à double effet qui envoie de l'huile dans les deux vérins de garde au sol situés en aval du dévers jusqu'à horizontalité du chassis supérieur, dans la limite de la longueur des vérins.5) Device according to the preceding claims taken as a whole characterized in that the oscillator controls an electric motor actuating a double-acting hydraulic distributor which sends oil into the two ground clearance cylinders located downstream of the superelevation horizontally of the upper chassis, within the limit of the length of the cylinders. 6) Dispositif selon les revendications précédentes prises dans leur ensemble caractérisé en ce que le compensateur d'effet centrifuge comprend un distribu -teur hydraulique, fixé sur le chassis supérieur et sur le méme circuit hydrau- -lique que le compensateur de dévers, qui contient une masselote, prise entre deux ressorts , et se déplaçant sous l'effet centrifuge, libère me entrée d'huile,qui alimente les vérins de variation de garde au 801, extérieurs au virage, en fonction du déplacement de la masselote, lui-même lié à l'importance de l'effet centrifuge. 6) Device according to the preceding claims taken as a whole, characterized in that the centrifugal effect compensator comprises a hydraulic distributor, fixed on the upper chassis and on the same hydraulic circuit as the cant compensator, which contains a flyweight, taken between two springs, and moving under the centrifugal effect, frees the entry of oil, which feeds the actuation variation cylinders at 801, outside the turn, depending on the movement of the flyweight, itself linked to the importance of the centrifugal effect. 7) Dispositif selon les revendications précédentes prises dans leur ensemble caractérisé en ce que la pompe hydraulique assure l'asservissement des organes d'embrayage, de freinage,de direction, en plus de la variation de la garde au sol7) Device according to the preceding claims taken as a whole characterized in that the hydraulic pump ensures the control of the clutch, braking, steering members, in addition to the variation of the ground clearance 8) Dispositif selon les revendications précédentes prises dans leur ensemble caractérisé en ce que la transmission du mouvement des ponts aux roues est assu -rée par des transmissions à cardans et à doubles tubes placées,par des renvois d'angles situés aux extrémités, parallélement aux longerons latéraux du chassis inférieur. 8) Device according to the preceding claims taken as a whole characterized in that the transmission of the movement of the bridges to the wheels is ensured by cardan transmissions and double tubes placed, by angular references located at the ends, parallel to the side rails of the lower chassis.
FR8501989A 1985-02-05 1985-02-05 DEVICE FOR DOUBLE CHASSIS WITH VARIABLE GROUND GUARD WITH COMPENSATION FOR CENTRIFUGAL AND TILT EFFECTS Expired FR2584026B1 (en)

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Application Number Priority Date Filing Date Title
FR8501989A FR2584026B1 (en) 1985-02-05 1985-02-05 DEVICE FOR DOUBLE CHASSIS WITH VARIABLE GROUND GUARD WITH COMPENSATION FOR CENTRIFUGAL AND TILT EFFECTS

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Application Number Priority Date Filing Date Title
FR8501989A FR2584026B1 (en) 1985-02-05 1985-02-05 DEVICE FOR DOUBLE CHASSIS WITH VARIABLE GROUND GUARD WITH COMPENSATION FOR CENTRIFUGAL AND TILT EFFECTS

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FR2584026A1 true FR2584026A1 (en) 1987-01-02
FR2584026B1 FR2584026B1 (en) 1989-11-24

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1534839A (en) * 1923-07-11 1925-04-21 Burnap James Madison Fluid-pressure cushioning mechanism for vehicles
US1918452A (en) * 1930-06-24 1933-07-18 Coubrough Henry Resilient vehicle suspension
FR1033673A (en) * 1951-02-19 1953-07-15 Suspension device for vehicles, in particular for motor vehicles
FR1119218A (en) * 1953-12-12 1956-06-18 Selene Method and device for converting rear two-wheel drive tractors into four-wheel drive tractors
FR1207733A (en) * 1957-07-17 1960-02-18 Level stabilizer device comprising a mechanism for imparting at all times to a vehicle or vessel the essentially correct trim
FR1221971A (en) * 1958-02-21 1960-06-07 Daimler Benz Ag Device for influencing the inclination in bends of vehicles, in particular motor cars
FR1308085A (en) * 1961-10-09 1962-11-03 Horizontal centrifugal stabilizer for automobiles
FR2175848A1 (en) * 1972-03-10 1973-10-26 Daimler Benz Ag
FR2245517A1 (en) * 1973-10-01 1975-04-25 Deere & Co
CH563274A5 (en) * 1974-03-18 1975-06-30 Zeder Alois Motor vehicle platform levelled about longitudinal axis - has arcuate geared guides on chassis for levelling platform

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1534839A (en) * 1923-07-11 1925-04-21 Burnap James Madison Fluid-pressure cushioning mechanism for vehicles
US1918452A (en) * 1930-06-24 1933-07-18 Coubrough Henry Resilient vehicle suspension
FR1033673A (en) * 1951-02-19 1953-07-15 Suspension device for vehicles, in particular for motor vehicles
FR1119218A (en) * 1953-12-12 1956-06-18 Selene Method and device for converting rear two-wheel drive tractors into four-wheel drive tractors
FR1207733A (en) * 1957-07-17 1960-02-18 Level stabilizer device comprising a mechanism for imparting at all times to a vehicle or vessel the essentially correct trim
FR1221971A (en) * 1958-02-21 1960-06-07 Daimler Benz Ag Device for influencing the inclination in bends of vehicles, in particular motor cars
FR1308085A (en) * 1961-10-09 1962-11-03 Horizontal centrifugal stabilizer for automobiles
FR2175848A1 (en) * 1972-03-10 1973-10-26 Daimler Benz Ag
FR2245517A1 (en) * 1973-10-01 1975-04-25 Deere & Co
CH563274A5 (en) * 1974-03-18 1975-06-30 Zeder Alois Motor vehicle platform levelled about longitudinal axis - has arcuate geared guides on chassis for levelling platform

Also Published As

Publication number Publication date
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