FR2668229A1 - Self-compensating shock-absorber device applicable to load splitting (sharing) axles - Google Patents

Self-compensating shock-absorber device applicable to load splitting (sharing) axles Download PDF

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Publication number
FR2668229A1
FR2668229A1 FR9013141A FR9013141A FR2668229A1 FR 2668229 A1 FR2668229 A1 FR 2668229A1 FR 9013141 A FR9013141 A FR 9013141A FR 9013141 A FR9013141 A FR 9013141A FR 2668229 A1 FR2668229 A1 FR 2668229A1
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FR
France
Prior art keywords
piston
cylinder
skirt
load
axles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
FR9013141A
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French (fr)
Inventor
Perini Giordano
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.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from FR9012143A external-priority patent/FR2667271A1/en
Application filed by Individual filed Critical Individual
Priority to FR9013141A priority Critical patent/FR2668229A1/en
Publication of FR2668229A1 publication Critical patent/FR2668229A1/en
Pending 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/06—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected fluid
    • B60G21/067—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected fluid between wheels on different axles on the same side of the vehicle, i.e. the left or the right side
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D63/00—Motor vehicles or trailers not otherwise provided for
    • B62D63/06—Trailers
    • B62D63/068—Trailers with more than two axles or more than four wheels
    • 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
    • F16F9/32—Details
    • F16F9/48—Arrangements for providing different damping effects at different parts of the stroke

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Vehicle Body Suspensions (AREA)

Abstract

The invention relates to a shock absorbing system which automatically compensates for load. It consists of a cylinder (11) having an intake orifice (15) and outlet orifices (S1, S2, S3). Inside the cylinder, a piston (12) with a double skirt (J1, J2) is held on the intake side of the cylinder (15) by a spring (13). The displacement of the piston (12) is regulated by a damper (14). When the oil coming from the primary circuit exerts a pressure in the skirt (J1) via the intake (15), the piston, with a slow movement owing to the effect of the damper (14) contracts the spring (13). The port (16) which is on the skirt (J1) becomes placed facing an outlet corresponding to the pressure coming from the primary circuit. The outlets (S1, S2, S3) are connected to hydropneumatic accumulators, the nominal pressure of which is higher or lower depending on the outlets. The device according to the invention is intended for agricultural and industrial trailers and chassis.

Description

DESCRIPTION
La présente invention concerne un dispositif applicable au dispositif du présent inventeur déposé le 27 septembre 1990 (No. d'enregistrement national 90-12143), appelé "essieux répartiteurs de charge"
Le dispositif précédent concerne l'utilisation sur des remorques d'essieux (1) à bras de suspension indépendants (2) . Ces bras de suspension sont reliés au châssis à leur extrémité côté moyeux, par des vérins (4) à simple effet.DESCRIPTION
The present invention relates to a device applicable to the device of the present inventor deposited on September 27, 1990 (National registration number 90-12143), called "axle load distributors"
The previous device relates to the use on axle trailers (1) with independent suspension arms (2). These suspension arms are connected to the chassis at their end on the hub side, by single-acting cylinders (4).

Les essieux (1) sont au nombre de deux au minimum et les vérins (4) sont reliés entre eux par tuyauteries (circuit primaire, 7 et 8 - Planche 2/3) agissant indépendemment de chaque coté de la remorque. Les vérins (4) exercent un effet de répartition des charges au moyen de l'huile qui circule librement dans les tuyauteries. Chaque circuit primaire (7 et 8) peut être relié aux prises hydrauliques du véhicule tracteur (9) afin de modifier volontairement la hauteur nominale de chaque côte de la remorque indépendemment (effet anti-devers) ou parallèlement (haussement).The axles (1) are at least two in number and the jacks (4) are interconnected by pipes (primary circuit, 7 and 8 - Plate 2/3) acting independently on each side of the trailer. The cylinders (4) exert a load distribution effect by means of the oil which circulates freely in the pipes. Each primary circuit (7 and 8) can be connected to the hydraulic sockets of the towing vehicle (9) in order to voluntarily modify the nominal height of each side of the trailer independently (anti-roll effect) or in parallel (increase).

Traditionnellement, les dispositifs d'amortissement des remorques agricoles ou industrielles sont calculés en rapport au poids total en charge. De ce fait, si les remorques en question ne sont pas chargées, les suspensions sont rigides, provoquant des sautillements lors des déplacements. Le dispositif selon l'invention permet de remédier à cet inconvénient. En effet, ce dispositif permet un amortissement constant indépendant des variations de charge. Ce dispositif Préconise l'emploi d'accumulateurs hydro-pneumatiques. Il comporte un cylindre (Planche 3/3 11) à l'intérieur duquel se trouve un Piston distributeur (12) à double jupe (.l1,J2). Ce piston distributeur, muni de joints toriques (18) est maintenu à une extrémité opposée au couvercle du cylindre (17) par un ressort (13) et sa course contrôlée Par un amortisseur (14).Le cylindre (11) est pourvu de plusieurs orifices, un orifice d'admission (15) relié au circuit primaire (7, 8 - Planche 2/3) et des orifices de sortie (S1, S2, S3 - Planche 3/3). Les orifices de sortie (S1, S2, S3) sont reliés aux accumulateurs hydropneumatiques. La jupe du piston (J1) qui est du côté de la distribution est pourvue d'une lumière (16) qui permet le passage d'huile vers les différentes sorties (S1, S2, S3).Traditionally, the damping devices of agricultural or industrial trailers are calculated in relation to the total laden weight. Therefore, if the trailers in question are not loaded, the suspensions are rigid, causing hopping during travel. The device according to the invention overcomes this drawback. Indeed, this device allows constant damping independent of load variations. This device recommends the use of hydro-pneumatic accumulators. It includes a cylinder (Plate 3/3 11) inside which is a distributor piston (12) with double skirt (.l1, J2). This distributor piston, provided with O-rings (18) is held at an end opposite to the cylinder cover (17) by a spring (13) and its stroke controlled by a damper (14). The cylinder (11) is provided with several ports, an inlet port (15) connected to the primary circuit (7, 8 - Plate 2/3) and outlet ports (S1, S2, S3 - Plate 3/3). The outlet ports (S1, S2, S3) are connected to the hydropneumatic accumulators. The skirt of the piston (J1) which is on the side of the distribution is provided with a light (16) which allows the passage of oil to the different outlets (S1, S2, S3).

Lorsque la remorque pourvue d'essieux répartiteurs de charge est vide, un seul orifice de sortie (S1) du présent dispositif est en communication avec le circuit primaire 8 8- Planche 2/3). De cette façon, au moyen d'accumulateurs hydro-pneumatiques reliés à la sortie (sol), La remorque dispose d'un amortissement en fonction de son poids à vide, du fait que l'accumulateur est conçu pour cette charge.When the trailer provided with load-sharing axles is empty, a single outlet (S1) of this device is in communication with the primary circuit 8 8- Plate 2/3). In this way, by means of hydro-pneumatic accumulators connected to the outlet (ground), the trailer has a damping as a function of its empty weight, because the accumulator is designed for this load.

Si l'on augmente relativement la charge de la remorque, la pression du circuit primaire (7, 8 - Planche 2/3) augmente en conséquence. Cette augmentation de pression induit le déplacement du piston distributeur (12), qui contraint le ressort (13). A ce stade, la lumière (16) du piston distributeur (12) se situe face à la deuxième sortie (S2).If the trailer load is relatively increased, the pressure in the primary circuit (7, 8 - Plate 2/3) increases accordingly. This increase in pressure induces the displacement of the distributor piston (12), which constrains the spring (13). At this stage, the lumen (16) of the distributor piston (12) is located opposite the second outlet (S2).

Ainsi, l'accumulateur hydro-pneumatique relié à la deuxième sortie (S2), plus puissant que le premier, assure un amortissement en relation avec l'augmentation de la charge.Thus, the hydro-pneumatic accumulator connected to the second outlet (S2), more powerful than the first, provides damping in relation to the increase in the load.

Si l'on augmente encore la charge sur la remorque, le piston distributeur (12) recule, déplaçant la lumiere (16) à la troisième sortie (S3). Au moment où une sortie est en correspondance avec la lumière (16) du piston distributeur (12), les autres sorties sont obturées par les jupes (J1,
J2).If the load on the trailer is further increased, the distributor piston (12) moves back, moving the light (16) to the third outlet (S3). When an outlet is in correspondence with the light (16) of the distributor piston (12), the other outlets are closed by the skirts (J1,
J2).

Les sorties (S1, S2, S3) du cylindre (11) ainsi que les essieux peuvent être augmentés en nombre, en fonction de l'augmentation du tonnage Prévu à la conception de la remorque. The outputs (S1, S2, S3) of the cylinder (11) as well as the axles can be increased in number, depending on the increase in tonnage Provided when the trailer is designed.

Un amortisseur à double effet (14) permet un déplacement lent du piston distributeur (12), afin d'éviter que celuici se déplace à cause des secousses encaissées par la remorque lors du roulage. Cet amortisseur (14) permet, nonobstant, le déplacement du piston distributeur (12) lors du chargement et déchargement de la remorque. Ce dispositif, aussi bien que le dispositif faisant l'objet du brevet "essieux répartiteurs de charge", est unilatéral, chaque côté de la remorque étant indépendant de l'autre. A double-acting shock absorber (14) allows the distributor piston (12) to move slowly, in order to prevent it from moving because of the jolts absorbed by the trailer during driving. This shock absorber (14) allows, notwithstanding, the displacement of the distributor piston (12) during loading and unloading of the trailer. This device, as well as the device which is the subject of the patent "axle load distributors", is unilateral, each side of the trailer being independent of the other.

Claims (3)

REVENDICATIONS 7 ) Dispositif pour l'amortissement de châssis pourvus d'essieux répartiteurs de charge comportant des vérins (4) reliés par des tuyauteries (7, 8), caractérisé en ce qu'il comporte un cylindre (11) relié au circuit primaire (7, 8) dans lequel se trouve un piston distributeur (12) ayant, côté distribution (J1), une lumière (16) qui est déplaçable en vis-à-vis de sorties successives (S1, S2, S3), de sorte à relier l'orifice d'admission d'huile (15) du dit cylindre selectivement à l'une des sorties, en obstruant les autres selon l'augmentation de pression due à l'augmentation de la charge sur le châssis, le dit piston distributeur (12) étant relié au couvercle (17) du cylindre (11) par un ressort (13). 7) Device for the damping of chassis provided with load-distributing axles comprising jacks (4) connected by pipes (7, 8), characterized in that it comprises a cylinder (11) connected to the primary circuit (7 , 8) in which there is a distributor piston (12) having, on the distribution side (J1), a light (16) which is movable vis-à-vis successive outlets (S1, S2, S3), so as to connect the oil intake orifice (15) of said cylinder selectively at one of the outlets, obstructing the others according to the increase in pressure due to the increase in the load on the chassis, the said distributing piston ( 12) being connected to the cover (17) of the cylinder (11) by a spring (13). 2) Dispositif selon la revendication 1, caractérisé en ce que le piston distributeur (12) est à double jupe (J1, J2), la lumière (16) étant disposée dans la jupe (J1). 2) Device according to claim 1, characterized in that the distributor piston (12) is a double skirt (J1, J2), the light (16) being disposed in the skirt (J1). 3) Dispositif selon les revendications 1 et 2, caractérisé en ce qu'il comporte un amortisseur (14) fixé au piston distributeur (12) et au couvercle (17) de sorte à déterminer un déplacement lent du piston distributeur (12). 3) Device according to claims 1 and 2, characterized in that it comprises a damper (14) fixed to the distributor piston (12) and to the cover (17) so as to determine a slow movement of the distributor piston (12).
FR9013141A 1990-09-27 1990-10-17 Self-compensating shock-absorber device applicable to load splitting (sharing) axles Pending FR2668229A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9013141A FR2668229A1 (en) 1990-09-27 1990-10-17 Self-compensating shock-absorber device applicable to load splitting (sharing) axles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9012143A FR2667271A1 (en) 1990-09-27 1990-09-27 Load-distributing axles
FR9013141A FR2668229A1 (en) 1990-09-27 1990-10-17 Self-compensating shock-absorber device applicable to load splitting (sharing) axles

Publications (1)

Publication Number Publication Date
FR2668229A1 true FR2668229A1 (en) 1992-04-24

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Application Number Title Priority Date Filing Date
FR9013141A Pending FR2668229A1 (en) 1990-09-27 1990-10-17 Self-compensating shock-absorber device applicable to load splitting (sharing) axles

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Country Link
FR (1) FR2668229A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1153370A (en) * 1956-05-30 1958-03-05 Height-adjustable compensated hydraulic suspension for automobiles and others
FR1207035A (en) * 1957-05-29 1960-02-12 Dunlop Rubber Co Shut-off valve for pressurized fluid
DE1555226A1 (en) * 1967-02-28 1970-10-15 Daimler Benz Ag Load-dependent hydro-pneumatic suspension
FR2152351A1 (en) * 1971-09-06 1973-04-27 Citroen Sa
FR2222239A1 (en) * 1973-03-21 1974-10-18 Desorbay Pierre Hydraulic equalising system for vehicle suspension - is for lorries and trailers with axles on ram controlled levers
GB2191157A (en) * 1986-06-07 1987-12-09 Peter John Raffels Control valve with damping means

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1153370A (en) * 1956-05-30 1958-03-05 Height-adjustable compensated hydraulic suspension for automobiles and others
FR1207035A (en) * 1957-05-29 1960-02-12 Dunlop Rubber Co Shut-off valve for pressurized fluid
DE1555226A1 (en) * 1967-02-28 1970-10-15 Daimler Benz Ag Load-dependent hydro-pneumatic suspension
FR2152351A1 (en) * 1971-09-06 1973-04-27 Citroen Sa
FR2222239A1 (en) * 1973-03-21 1974-10-18 Desorbay Pierre Hydraulic equalising system for vehicle suspension - is for lorries and trailers with axles on ram controlled levers
GB2191157A (en) * 1986-06-07 1987-12-09 Peter John Raffels Control valve with damping means

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