FR2633220A1 - Vehicle suspension, particularly for a heavy vehicle - Google Patents

Vehicle suspension, particularly for a heavy vehicle Download PDF

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Publication number
FR2633220A1
FR2633220A1 FR8808376A FR8808376A FR2633220A1 FR 2633220 A1 FR2633220 A1 FR 2633220A1 FR 8808376 A FR8808376 A FR 8808376A FR 8808376 A FR8808376 A FR 8808376A FR 2633220 A1 FR2633220 A1 FR 2633220A1
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France
Prior art keywords
spring
suspension
chassis
vehicle
cushion
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Granted
Application number
FR8808376A
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French (fr)
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FR2633220B1 (en
Inventor
Jean Michel Harley
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SOVAM IND
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SOVAM IND
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Publication date
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Priority to FR8808376A priority Critical patent/FR2633220B1/en
Publication of FR2633220A1 publication Critical patent/FR2633220A1/en
Application granted granted Critical
Publication of FR2633220B1 publication Critical patent/FR2633220B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • 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
    • B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
    • B60G17/052—Pneumatic spring characteristics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/02—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only
    • B60G11/10—Resilient suspensions characterised by arrangement, location or kind of springs having leaf springs only characterised by means specially adapted for attaching the spring to axle or sprung part of the vehicle
    • B60G11/107—Sliding or rolling mountings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G13/00—Resilient suspensions characterised by arrangement, location or type of vibration dampers
    • B60G13/02—Resilient suspensions characterised by arrangement, location or type of vibration dampers having dampers dissipating energy, e.g. frictionally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2200/00—Indexing codes relating to suspension types
    • B60G2200/30—Rigid axle suspensions
    • B60G2200/31—Rigid axle suspensions with two trailing arms rigidly connected to the axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/15—Fluid spring
    • B60G2202/152—Pneumatic spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/11—Mounting of sensors thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/45—Stops limiting travel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/25—Stroke; Height; Displacement
    • B60G2400/252—Stroke; Height; Displacement vertical

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

Abstract

Suspension for a motor vehicle comprising a leaf spring 13 fixed by its middle zone to the axle 16 of the vehicle and connected by its ends to the chassis 15 of the vehicle, one of the connections of the spring to the chassis comprising an air cushion 18, the suspension being characterised in that the air cushion 18, called first air cushion, connecting one of the ends of the spring to the chassis receives a constant air pressure, this pressure being adjustable in order to vary the suspension between the high position and a low position and in that the middle zone of the spring is connected to the chassis by a second air cushion 19 which receives a variable air pressure tending to keep the middle zone of the spring at a constant height when the first air cushion is supplied by a constant air pressure corresponding to the high position for the suspension.

Description

L'invention concerne une suspension de véhicule et, notamment, de véhicule lourd. The invention relates to a vehicle suspension and, in particular, a heavy vehicle suspension.

On connaît déjà des suspensions qui comprennent (voir figure 1) un ressort à lames 1, qui est relié par ses extrémités au châssis 2 du véhicule, l'une de ces liaisons comportant un coussin d'air 3 dont la pression d'air est variable en fonction de la charge du véhicule. Cette disposition est destinée à obtenir une hauteur constante du châssis par rapport au sol. Dans ce cas, il est prévu une valve de nivel leent 4 qui est fixée au châssis 2 et qui est reliée par une tringlerie 5 au ressort 1 dans sa zone médiane. Ainsi, toute variation de position du ressort en fonction de la charge du véhicule, se traduit par une modificatio- de la pression du coussin d'air, afin de faire varier le niveau de l'extrémité correspondante du ressort et, donc, de maintenir le châssis à une hauteur constante. Suspensions are already known which comprise (see FIG. 1) a leaf spring 1, which is connected at its ends to the chassis 2 of the vehicle, one of these connections comprising an air cushion 3 whose air pressure is variable depending on the vehicle load. This arrangement is intended to obtain a constant height of the chassis relative to the ground. In this case, there is provided a leent leveling valve 4 which is fixed to the frame 2 and which is connected by a linkage 5 to the spring 1 in its middle zone. Thus, any variation in the position of the spring as a function of the vehicle load, results in a modification of the pressure of the air cushion, in order to vary the level of the corresponding end of the spring and, therefore, to maintain the chassis at a constant height.

Cette disposition présente un inconvénient majeur, résidant dans le fait que la dureté de la suspension varie de façon considérable avec la charge. This arrangement has a major drawback, residing in the fact that the hardness of the suspension varies considerably with the load.

Ainsi, si la charge est faible, la pression d'air dans le coussin 3 est faible et on obtient une suspension souple à grand débattement. Par contre, si la charge du véhicule est forte, le coussin d'air reçoit une pression d'air portante pour rétablir le niveau du véhicule, ce qui se traduit par une suspension dure ou à faible débattement.Thus, if the load is low, the air pressure in the cushion 3 is low and a flexible suspension with long travel is obtained. On the other hand, if the vehicle load is high, the air cushion receives a bearing air pressure to restore the level of the vehicle, which results in a hard suspension or with low travel.

On connaît également (voir figure 2) une suspension suivant laquelle la lame de ressort 7 est reliée e 8 par ses deux extrémités au châssis 9, tandis qu'un coussin d'air 10 est disposé entre le châssis 9 et la zone médiane du ressort à lame 7. Dans ce cas, une valve de nivellement 11 est également fixée au châssis et reliée par une tringlerie 12 à la zone médiane du ressort 7 afin que le coussin d'air 10 soit alimenté par une pression d'air qui est variable en fonction de ia charge. Ainsi, la variation de charge du véhicule est compensée par la variation de la pres sio d'air dans le coussin 10, si bien que le ressort 7 supporte toujours la même charge. There is also known (see FIG. 2) a suspension according to which the spring leaf 7 is connected e 8 by its two ends to the chassis 9, while an air cushion 10 is disposed between the chassis 9 and the central region of the spring with leaf 7. In this case, a leveling valve 11 is also fixed to the chassis and connected by a linkage 12 to the central zone of the spring 7 so that the air cushion 10 is supplied by an air pressure which is variable depending on the load. Thus, the variation in the load of the vehicle is compensated by the variation in the pressure of air in the cushion 10, so that the spring 7 always supports the same load.

L'industrie souhaite actuellement disposer de véhicules lourds, tels que des bus, camions, véhicules à plate-forme de transport de charges fragiles, telles aue du verre, etc., qui possèdent des suspensions de souplesse constante mais qui puissent, en outre, être placés dans une position surbaissée, soit dans le but de réduire la hauteur totale du véhicule, soit au contraire dans le but d'abaisser le plancher
la plate-forme du véhicule afin de faciliter l'acces ou le chargement. The industry currently wishes to have heavy vehicles, such as buses, trucks, vehicles with a platform for transporting fragile loads, such as glass, etc., which have suspensions of constant flexibility but which can, moreover, be placed in a lowered position, either in order to reduce the total height of the vehicle, or on the contrary in order to lower the floor
the vehicle platform to facilitate access or loading.

La présente invention concerne à cet effet une suspension pour véhicule automobile, comprenant un ressort à lame fixé par sa zone médiane à i'essieu du véhicule et relié par ses extrémités au châssis du véhicule, l'une des liaisons du ressort au châssis correnant un coussin d'ar, suspension caractérisée en ce q le coussin d'air, dit premier coussin d'air, reliant l'une des extrémités du ressort au châssis, reçoit une pression d'air constante, cette pression étant réglable pour faire varier la suspension entre une position haute et une position basse et en ce que la zone médiane du ressort est reliée au châssis par un second coussin d'air qui reçoit une pression d'air variable tendant à maintenir à une hauteur constante la zone médiane du ressort lorsque le premier coussin d'air est alimenté par une pression d'air constante correspondant à la position haute de la suspension. The present invention relates for this purpose to a suspension for a motor vehicle, comprising a leaf spring fixed by its central zone to the axle of the vehicle and connected by its ends to the chassis of the vehicle, one of the connections of the spring to the chassis correlating a rear cushion, suspension characterized in that the air cushion, known as the first air cushion, connecting one of the ends of the spring to the chassis, receives a constant air pressure, this pressure being adjustable to vary the suspension between a high position and a low position and in that the middle zone of the spring is connected to the chassis by a second air cushion which receives a variable air pressure tending to maintain at a constant height the middle zone of the spring when the first air cushion is supplied by a constant air pressure corresponding to the high position of the suspension.

Suivant une autre caractéristique de l'invention, la suspension comporte un dispositif de guidage latéral du ressort disposé à proximité du premier coussin d'air.  According to another characteristic of the invention, the suspension comprises a device for lateral guidance of the spring disposed near the first air cushion.

Suivant une autre caractéristique de l'in- vention, le ressort est en appui latéral sur le dispositif de guidage par l'intermédiaire d'au moins une plaquette de frottement. According to another characteristic of the invention, the spring is in lateral support on the guide device by means of at least one friction plate.

Suivant une autre caractéristique de l'invention, une butée élastique est prévue entre le châssis et le ressort à proximité du premier et/ou du second coussins d'air pour constituer des surfaces d'appui pour le ressort dans la position basse de la suspension. According to another characteristic of the invention, an elastic stop is provided between the frame and the spring near the first and / or the second air cushions to form bearing surfaces for the spring in the low position of the suspension. .

L'invention est représentée à titre d'exemple non limitatif sur les dessins ci-joints dans lesquels
- la figure 3 est une vue latérale d'une suspension conforme à l'invention,
- la figure 4 est une coupe suivant A-A de la figure 3.The invention is shown by way of non-limiting example in the accompanying drawings in which
FIG. 3 is a side view of a suspension in accordance with the invention,
- Figure 4 is a section along AA of Figure 3.

La présente invention a en conséquence pour but la réalisation d'une suspension pour véhicule et, nota-ment, pour véhicule lourd, qui comporte un ressort à lame et des coussins pneumatiques et qui soit surbaissable.  The present invention therefore aims to achieve a suspension for a vehicle and, notably, for a heavy vehicle, which comprises a leaf spring and pneumatic cushions and which is lowerable.

Sur la figure 3, on a ainsi représenté une suspension qui comprend une lame de ressort qui est accrochée pa son extrémité avant (dans le sens d'avancement du véhicule) à un étrier 14 solidaire du longeron 15 du chassis du véhicule. Ce ressort à lame 13 est fixé dans sa zone médiane à l'essieu 16 supportant les roues du véhicule, dont l'une d'entre elles est représentée en 17. In FIG. 3, a suspension is thus represented which comprises a leaf spring which is hooked by its front end (in the direction of advance of the vehicle) to a stirrup 14 secured to the side member 15 of the chassis of the vehicle. This leaf spring 13 is fixed in its central zone to the axle 16 supporting the vehicle wheels, one of which is shown at 17.

L'extrémité arrière du ressort à lame 13 est en appui sur le longeron 15 par l'intermédiaire d'un coussin d'air 18, tandis que la zone médiane de ce ressort est en appui sur le longeron 15 par un coussin d'air 19. Ce coussin d'air 19 est alirnenté en air sous pression par l'intermédiaire d'une valve de nivelle met 2C dont la tige de commande 21, est reliée en 22 au ressort 13, par l'intermédiaire de la tringlerie 23.Le coussin d'air 18 est alimenté par une pression d'air constante, par l'intermédiaire d'une distribution, de façon que lorsque le véhicule se déplace sur route, la suspension du véhicule se traduise par la combinaison des effets du ressort 13, du coussin arrière 18 alimenté par une pression d'air constante et du coussin médian 19 alimenté par une pression d'air variable.Ainsi, le ressort 13 voit sa contribu tic à la suspension du véhicule, complétée par le coussin d'air 19 dont la pression est asservie par la valve 20 pour tendre à maintenir constant le niveau du longeron 15 et cela tandis que le coussin arrière 18 est susceptible de réagir en combinaison avec le ressort i3 et le coussin 19 pour absorber les vibraticns et conserver au ressort i3 toute son efficacité. The rear end of the leaf spring 13 is supported on the spar 15 by means of an air cushion 18, while the middle zone of this spring is supported on the spar 15 by an air cushion 19. This air cushion 19 is supplied with pressurized air by means of a leveling valve puts 2C, the control rod 21 of which is connected at 22 to the spring 13, by means of the linkage 23. The air cushion 18 is supplied by a constant air pressure, via a distribution, so that when the vehicle is traveling on the road, the suspension of the vehicle results in the combination of the effects of spring 13 , of the rear cushion 18 supplied by a constant air pressure and of the middle cushion 19 supplied by a variable air pressure. Thus, the spring 13 sees its contribution to the suspension of the vehicle, supplemented by the air cushion 19 whose pressure is controlled by the valve 20 to tend to keep the level of the spar constant 15 and this while the rear cushion 18 is capable of reacting in combination with the spring i3 and the cushion 19 to absorb the vibrations and keep the spring i3 fully effective.

Lors ru déplacement du véhicule sur route, le ressort 13 verra ainsi s position varier dans les limites ceterminées par la double flèche 24, la roue adjacente du véhicule se déplaçant entre les positions 17. et 172.  When the vehicle is moved on the road, the spring 13 will thus see its position vary within the limits determined by the double arrow 24, the adjacent wheel of the vehicle moving between positions 17. and 172.

Cette suspension, qui comporte bien entendu un amortisseur représenté en 25, comporte également une tringlerie ou un câble 26 qui est fixé au châssis par son extrémité supérieure en 27 et qui comporte à son extrémité inférieure, un tampon élastique 28 sur lequel est susceptible de venir s'appliquer le ressort 13, afin de limiter son débattement maximum. This suspension, which of course includes a shock absorber shown at 25, also includes a linkage or cable 26 which is fixed to the chassis by its upper end at 27 and which comprises at its lower end, an elastic buffer 28 on which is likely to come apply the spring 13, in order to limit its maximum travel.

Egalement, à proximité du coussin arriere 18, il est prévu une chape 29 dont les deux branches 29 et 292 encadrent le ressort à lame 13 par l'intermédiaire de plaquettes de frottement 30. Le ressort à lame 13 est disposé de manière à s'appliquer à pres sion cotre au moins l'une des lames 30, de façon à contribuer à l'amortissement des vibrations de l'extrémité arrière du ressort. Also, near the rear cushion 18, a yoke 29 is provided, the two branches 29 and 292 of which frame the leaf spring 13 by means of friction plates 30. The leaf spring 13 is arranged so that it apply cutter pressure to at least one of the blades 30, so as to contribute to damping the vibrations of the rear end of the spring.

La disposition conforme à l'invention, permet d'aboutir de manière extrêmement simple à la réaiisation d'une suspension surbaissable, en modifiant la pression constante du coussin d'air arrière 18. The arrangement in accordance with the invention makes it possible to achieve in a very simple manner the creation of a lowerable suspension, by modifying the constant pressure of the rear air cushion 18.

Dans l'exemple représenté, la position surbaissée est illustrée par la position 13. du ressort 13 et est obtenue par la coupure de l'alimenta tion en air sous pression des coussins 18 et 19. Dans ce cas, l'extrémité arrière du ressort 13 vient en appuI contre un tampon en matériau élastique 31 fixé sous ie longeron 15, tandis que la zone médiane du ressort 13 viet en appui contre un tampon 32 fixé également sous le longeron 15 à proximité du coussin 19. Dans cette position surbaissée, la roue 17 occupe la position 17; résultant du déplacement du ressort 13 canes la position 13. suivant la flèche 33. In the example shown, the lowered position is illustrated by the position 13. of the spring 13 and is obtained by cutting the supply of pressurized air to the cushions 18 and 19. In this case, the rear end of the spring 13 comes into abutment against a buffer of elastic material 31 fixed under the spar 15, while the middle region of the spring 13 presses against a pad 32 also fixed under the spar 15 near the cushion 19. In this lowered position, the wheel 17 occupies position 17; resulting from the displacement of the spring 13 canes position 13. according to arrow 33.

ta disposition conforme à l'invention aboutit donc à la réalisation d'une suspension qui soit surbaissable et qui, en position haute, combine les effets de suspension d'un ressort à lame et de ceux produits par une disposition particulière de coussins pneumatique.  your arrangement in accordance with the invention therefore results in the production of a suspension which is lowerable and which, in the high position, combines the suspension effects of a leaf spring and those produced by a particular arrangement of pneumatic cushions.

Claims (7)

REVENDICATIONS 1) Suspension pour véhicule automobile, comprenant un ressort à lame (13) fixé par sa zone médiane à l'essieu (16) du véhicule et relié par ses extrémités au châssis (15) du véhicule, l'une des liaisons du ressort au châssis comprenant un coussin d'air (18), suspension caractérisée en ce que le coussin d'air (18), dit premier coussin d'air, reliant l'une des extrémités du ressort au châssis, reçoit une pression d'air constante, cette pression étant réglable pour faire varier la suspension entre une position haute et une position basse et en ce que la zone médiane du ressort est reliée au châssis par un second coussin d'air (19) qui reçoit une pression d'air variable tendant à maintenir à une hauteur constante la zone médiane du ressort lorsque le premier coussin d'air est alimenté par une pression d'air constante correspondant à la position haute de la suspension. 1) Suspension for a motor vehicle, comprising a leaf spring (13) fixed by its central zone to the axle (16) of the vehicle and connected by its ends to the chassis (15) of the vehicle, one of the connections of the spring to the chassis comprising an air cushion (18), suspension characterized in that the air cushion (18), said first air cushion, connecting one end of the spring to the chassis, receives a constant air pressure , this pressure being adjustable to vary the suspension between a high position and a low position and in that the central region of the spring is connected to the chassis by a second air cushion (19) which receives a variable tending air pressure to maintain at a constant height the middle zone of the spring when the first air cushion is supplied by a constant air pressure corresponding to the high position of the suspension. 2) Suspension conforme à la revendication 1, caractérisée en ce qu'elle comporte un dispositif de guidage latéral (29) du ressort disposé à proximité du premier coussin d'air (18). 2) Suspension according to claim 1, characterized in that it comprises a lateral guide device (29) of the spring disposed near the first air cushion (18). 3) Suspension conforme à la revendication 2, caractérisée e ce que le ressort (13) est en appui latéral sur le dispositif de guidage (29) par l'intermédiaire d'au moins une plaquette de frottement (30). 3) Suspension according to claim 2, characterized in that the spring (13) is in lateral support on the guide device (29) by means of at least one friction plate (30). 4) Suspension conforme à la revendication 1, caractérisée e ce que le second coussin d'air (19) reçoit la pression d'air variable par l'intermédiaire d'une vanne de nivellement (20) fixée au châssis (15) et reliée par une tringlerie de commande (23) au ressort (13) de manière à asservir la pression d'air du coussin à la charge du véhicule. 4) Suspension according to claim 1, characterized in that the second air cushion (19) receives the variable air pressure via a leveling valve (20) fixed to the frame (15) and connected by a control linkage (23) to the spring (13) so as to control the air pressure of the cushion to the load of the vehicle. 5) Suspension conforme à l'une quelconque des revendications précédentes, caractérisée en ce qu une butée élastique (31, 32) est prévue entre le châssis et le ressort à proximité du premier et/ou du second coussIns d'air pour constituer des surfaces d'appui pour le ressort dans la position basse de la susension.  5) Suspension according to any one of the preceding claims, characterized in that an elastic stop (31, 32) is provided between the frame and the spring near the first and / or second air cushions to form surfaces support for the spring in the low position of the suspension. 6) Suspension conforme à l'une quelconque des revendications précédentes, caractérisée en ce que le châssis et le ressort sont reliés par un câble ou similaire (26: déterminant un écartement maximum du ressort par rapport ou châssis. 6) Suspension according to any one of the preceding claims, characterized in that the chassis and the spring are connected by a cable or the like (26: determining a maximum spacing of the spring relative to or chassis. 7) Suspension conforme à la revendication 1, caractérisée en ce que pour la position basse de la suspension, la pression d'air du premier coussin (18) ainsi que celle du second coussin (19) sont égales à la pression atmosphérique.  7) Suspension according to claim 1, characterized in that for the low position of the suspension, the air pressure of the first cushion (18) and that of the second cushion (19) are equal to atmospheric pressure.
FR8808376A 1988-06-22 1988-06-22 SUSPENSION OF VEHICLE AND PARTICULARLY HEAVY VEHICLE Expired - Fee Related FR2633220B1 (en)

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Application Number Priority Date Filing Date Title
FR8808376A FR2633220B1 (en) 1988-06-22 1988-06-22 SUSPENSION OF VEHICLE AND PARTICULARLY HEAVY VEHICLE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8808376A FR2633220B1 (en) 1988-06-22 1988-06-22 SUSPENSION OF VEHICLE AND PARTICULARLY HEAVY VEHICLE

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FR2633220A1 true FR2633220A1 (en) 1989-12-29
FR2633220B1 FR2633220B1 (en) 1990-10-12

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0583597A1 (en) * 1992-08-20 1994-02-23 Steyr Nutzfahrzeuge Ag Linkage for a rigid front axle, in particular for utility vehicles
CN103770837A (en) * 2012-10-18 2014-05-07 北汽福田汽车股份有限公司 Double-flexible-shaft multi-shaft steering running gear structure and automobile thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1422939A (en) * 1963-11-14 1966-01-03 Fruehauf Corp Single leaf spring wheel suspension with air reservoir, especially for trailers
US3315978A (en) * 1965-03-04 1967-04-25 Fruehauf Corp Axle lift (radius rod)
US3674249A (en) * 1970-07-13 1972-07-04 H & H Equipment Co Pneumatic suspension axle return device
US3738679A (en) * 1972-05-15 1973-06-12 W Jackson Auxiliary retraction assembly for pneumatically suspended tandem-axle types
FR2543889A1 (en) * 1983-04-11 1984-10-12 Granning Suspensions VEHICLE AUXILIARY AXLE SUSPENSION

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1422939A (en) * 1963-11-14 1966-01-03 Fruehauf Corp Single leaf spring wheel suspension with air reservoir, especially for trailers
US3315978A (en) * 1965-03-04 1967-04-25 Fruehauf Corp Axle lift (radius rod)
US3674249A (en) * 1970-07-13 1972-07-04 H & H Equipment Co Pneumatic suspension axle return device
US3738679A (en) * 1972-05-15 1973-06-12 W Jackson Auxiliary retraction assembly for pneumatically suspended tandem-axle types
FR2543889A1 (en) * 1983-04-11 1984-10-12 Granning Suspensions VEHICLE AUXILIARY AXLE SUSPENSION

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0583597A1 (en) * 1992-08-20 1994-02-23 Steyr Nutzfahrzeuge Ag Linkage for a rigid front axle, in particular for utility vehicles
CN103770837A (en) * 2012-10-18 2014-05-07 北汽福田汽车股份有限公司 Double-flexible-shaft multi-shaft steering running gear structure and automobile thereof

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Publication number Publication date
FR2633220B1 (en) 1990-10-12

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