FR2645492A1 - Combined controls device for a self-steering or follower axle of an agricultural or road vehicle - Google Patents

Combined controls device for a self-steering or follower axle of an agricultural or road vehicle Download PDF

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Publication number
FR2645492A1
FR2645492A1 FR8904867A FR8904867A FR2645492A1 FR 2645492 A1 FR2645492 A1 FR 2645492A1 FR 8904867 A FR8904867 A FR 8904867A FR 8904867 A FR8904867 A FR 8904867A FR 2645492 A1 FR2645492 A1 FR 2645492A1
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Prior art keywords
cylinders
control device
self
pressure
reverse
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Revoked
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FR8904867A
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French (fr)
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Individual
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Individual
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Priority to FR8904867A priority Critical patent/FR2645492A1/en
Priority to IT16702A priority patent/IT1242452B/en
Publication of FR2645492A1 publication Critical patent/FR2645492A1/en
Revoked legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D13/00—Steering specially adapted for trailers
    • B62D13/06—Steering specially adapted for trailers for backing a normally drawn trailer

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Non-Deflectable Wheels, Steering Of Trailers, Or Other Steering (AREA)

Abstract

Combined controls device, for obtaining, at the appointed time, the steering operation, with dual forward-travel reverse-travel alternate and corrected piloting of a self-steering axle 15 or follower axle 13, operating as follows: The compressed air is sent into and stored in the brake bottle 18. A blocking valve 1 calibrated to approximately 6 bar opens and transmits the surplus pressure to the distributor which is at rest and therefore open via the pipeline 4. This pressure activates the hydraulic or pneumatic thrust cylinders V.A. and the self-steering axle 15 is prepared for operating fowards travel. The engagement of reverse gear in the gearbox (or any other means) of the towing vehicle, or lorry, activates the original contact, provided for switching on the reversing light. This current arrives through the flex 9 at the electrical distributor 3 which, via the pipeline 5, activates the reverse running thrust cylinders V.R. The air in the front thrust cylinders is released at the same time, and the self-steering axle is thus ready for reverse travel.

Description

Des prototypes d'éssieux auto-directeurs ou suiveurs nouveaux (voir Brevet Tonarelli no 7509183),ont fait leur apparition ces dernières années dans divers salons pour véhicules agraires et routiers.Prototypes of new self-steering or following axles (see Tonarelli Patent no 7509183) have appeared in recent years at various shows for agricultural and road vehicles.

Pouvant fonctionner en marche-avant,mais aussi en marcheavant et en marche-arrière,ces éssieux nouveaux,ont suscité un grand intéret parmi les utilisateurs.Being able to operate in forward, but also in forward and reverse, these new axles, have aroused great interest among users.

Cependant il est important de préciser que ces éssieux ne seraient pas utilisables ni fonctionnels,sans la complementarité des dispositifs de commande,et des circuits pneumatiques et hydrauliques faisant l'objet de cette demande de Brevet.However, it is important to specify that these axles would not be usable or functional, without the complementarity of the control devices, and the pneumatic and hydraulic circuits which are the subject of this patent application.

En effets,ce combiné est prévu,pour obtenir terme, le fonctionnement du double pilotage en alternance,des éssieux auto-directeurs,selon que le véhicule avance, ou qu'il recule.Indeed, this handset is provided, to obtain term, the operation of dual piloting alternately, self-steering axles, depending on whether the vehicle is moving forward, or that it is reversing.

La Fig.l et son schéma 1/3 ci-joint,expliquent clairement le role de chaque appareil pneumatique (utilisation routière) pour pourvoir obtenir le parfait fonctionnement automatique,(ou manuel) des éssieux de type nouveaux, comme suit:
L'air est envoyé et stocké par le compresseur,dans la bouteille des freins(l8).Une valve de barrage(l) (avec retour)tarée à 6 bars environs,s'ouvre lorsque cette pression est atteinte,et laisse passer le surplus de cette pression,vers le distributeur à électro-vanne(3), qui étant ouvert(au repos),la - transmet par la canaiisation (4) immédiatement aux verins pneumatiques ou hydrauliques de marche avant V.A de l'essieu auto-directeur(15) avec pour rôle de les bloquer en bout de course.Fig.l and its diagram 1/3 attached, clearly explain the role of each pneumatic device (road use) to provide perfect automatic operation (or manual) of new type axles, as follows:
The air is sent and stored by the compressor, in the brake bottle (l8) .A shut-off valve (l) (with return) calibrated to around 6 bars, opens when this pressure is reached, and lets the surplus of this pressure, towards the solenoid valve distributor (3), which being open (at rest), the - transmits by the pipeline (4) immediately to the pneumatic or hydraulic forward cylinders VA of the self-steering axle (15) with the role of blocking them at the end of their travel.

Ainsi l'éssieu et aussi le véhicule qu'il équipe,se trouvent parés pour la marche vers l'avant.Le clapet(2) empêche la pression du circuit de revenir à la bouteille des freins(18)si celle-ci venait à perdre momentanément de sa pression initiale.Thus the axle and also the vehicle which it equips, are ready for the forward movement. The valve (2) prevents the pressure of the circuit from returning to the cylinder of the brakes (18) if it comes to momentarily lose its initial pressure.

La bouteille(l7) sert à stocker l'air qui sera nécessaire pour alimenter le circuit,lors des manoeuvres.The bottle (17) is used to store the air that will be necessary to supply the circuit, during the maneuvers.

Pendant celles-ci en effet, une partie de l'air repart dans l'atmosphère à mesure que la pression dans les verins pneumatiques n'est plus utile.(alternance)
En conclusion,avant d'accéder à la bouteille(17),l'air est en priorité,envoyé aux verins pneumatiques. La valve de barrage(l)(avec retour) empeche la bouteille(17) de ce remplir,si le circuit et les verins qui sont prioritaires,n'ont pas atteint la pression d'au moins 6 bars.During these, in fact, part of the air returns to the atmosphere as the pressure in the pneumatic cylinders is no longer useful.
In conclusion, before accessing the bottle (17), the air is in priority, sent to the pneumatic cylinders. The barrier valve (l) (with return) prevents the bottle (17) from filling up, if the circuit and the cylinders which have priority, have not reached the pressure of at least 6 bars.

Lorsque le véhicule doit reculer,le conducteur enclanche la marche-arrière.Son geste provoque alors,l'enclanchement dans la boite à vitesses,.du contacteur électrique de commande du feu de recul du véhicule tracteur(prévu d'aurigine). Ce même courant,parvient alors,par le cable(9), à l'électro-distributeurt-3) et provoque l'inversion de la pression qui est alors véhiculée par la canalisation(5) vers les verins pneumatiques(ou hydrauliques) arrière V.fl de l'essieu auto-directeur.When the vehicle has to reverse, the driver engages reverse gear. His gesture then causes the electrical contactor to control the reversing light of the towing vehicle to be engaged in the gearbox. This same current, then reaches, by the cable (9), to the electro-distributor (3) and causes the reversal of the pressure which is then conveyed by the pipe (5) towards the rear pneumatic (or hydraulic) jacks. V.fl of the self-steering axle.

Des moyens manuels,tels que interrupteurs électriques,ou distributeurs hydraoliques(ou autres),pourront être utilisés a ces fins.Manual means, such as electrical switches, or hydraolic distributors (or others), may be used for these purposes.

Les selecteurs de circuit (),ont pour r81e de laisser passer la pression la plus forte,dtou qu'elle vienne.The circuit selectors () have the role of letting the strongest pressure pass, as soon as it comes.

C'est ainsi que dans des circonstances exceptionnelles, le conducteur pourra,avec un contacteur de commande, placé dans sa cabine(ou ailleur),activer l'électro-vanne(8) et ainsi transmettre aux verins pneumatiques(ou hydrau
liques) avant et arrière,la pression de la canalisation(6),
qui sert a bloquer par(l2)et(l3)le fonctionnement de
l'Essieu et les roues dans la position droite.Thus in exceptional circumstances, the driver can, with a control switch, placed in his cabin (or elsewhere), activate the solenoid valve (8) and thus transmit to the pneumatic cylinders (or hydrau
front and rear, the pressure of the pipe (6),
which is used to block by (l2) and (l3) the operation of
the Axle and the wheels in the upright position.

Pendant la marche avant, les verins pneumatiques ( ou hydrauliques ) avant V.A., sont en pression totale.During forward travel, the pneumatic (or hydraulic) cylinders before V.A., are at full pressure.

Les vérins pneumatiques arrière V.R. au lieu d'être vides, seront à ce moment, sous une pression relative (1 Bar environ qui leur vient tranmisepar 1e régulateur de pression (10) ( ou (33) si hydraulique ) prévu a cet effet.The rear pneumatic cylinders V.R. instead of being empty, will be at this time, under a relative pressure (about 1 Bar which is transmitted to them by the pressure regulator (10) (or (33) if hydraulic) provided for this purpose.

Cette pression relative des vérins arrière à pour rôle d'empêcher les vibrations et les débattements des roues, lors du passage sur route bosselée ou en devers.This relative pressure of the rear cylinders has the role of preventing the vibrations and the deflections of the wheels, when passing on bumpy road or on slopes.

Un amortisseur (14) placé entre un point fixe et le titant de chappe avant de la fusée de l'éssieu auto-directeur (15), permet a celui-ci un fonctionnement d'appoint, jouant le r8le de bras directionnel, lorsque le circuit pneumatique , ou hydraulique serait inactif. L'essieu auto-directeur devient dans ces circonstances, simple suiveur. A shock absorber (14) placed between a fixed point and the chappe titant before the rocket of the self-steering axle (15), allows the latter to function as a backup, playing the role of a directional arm when the pneumatic or hydraulic circuit would be inactive. In these circumstances, the self-steering axle becomes a simple follower.

(16) Essieux rixes du-trlden (11) Bostlers de protection des appareils. (16) Rixes du-trlden axles (11) Bostlers to protect the devices.

(19) Fleche indiquant le sens de marche vers l'avant.(19) Arrow indicating the direction of forward travel.

Le 'aSae fonctionnement décrit plus haute s'obtient avec un circuit hydraulique. La Fig 2 du Schéma 2/3 xplique cette autre application du brevet.The 'aSae operation described above is obtained with a hydraulic circuit. Fig 2 of Diagram 2/3 x explains this other application of the patent.

Un distributeur D.E. manuel ou électrique, transmet la pression hydraulique du tracteur aux vérins avant V.A. des essieux auto-directeurs(21) du tridis de ce schéma Le tridem du schéma comporte ici un dssieu fixe (22) et deux essieux auto-directeurs
(montage agraire ).A manual or electric distributor DE transmits the hydraulic pressure from the tractor to the front cylinders VA of the self-steering axles (21) of the tridis in this diagram The tridem in the diagram here comprises a fixed axle (22) and two self-steering axles
(agrarian assembly).

Le même distributeur positionné autrement, transmet la pression hydraulique au vérins V.R. de marche arrière en alternance, le distributeur S.E. manuel ou électrique, transmet la pression a tous les vérins, pour obtenir le bloquage des éssieux et des roues en position droite.The same distributor positioned differently, transmits the hydraulic pressure to the V.R. alternating reverse gear, the manual or electric S.E. distributor, transmits the pressure to all the cylinders, to lock the axles and the wheels in the upright position.

Les essieux suiveurs de toute nature, sont également concernés par les circuits pneumatiques et hydrauliques décrits
En effet, le schéma 3/3 Fig 3 montre un éssieu suiveur (B) équipé des vérins V.R.-prévus pour ramener les roues en ligne droite et les bloquer (D1 D2 ) grâce au simple distributeur hydraulique D.E. placé dans la cabine du tracteur ( ou camion)
Cette commande par distributeur hydraulique, sera remplacée par une: éléctrovanne, dans le cas d'un circuit pneumatique.The following axles of all kinds are also affected by the pneumatic and hydraulic circuits described
Indeed, diagram 3/3 Fig 3 shows a follower axle (B) fitted with VR-cylinders provided to bring the wheels back in a straight line and lock them (D1 D2) thanks to the simple hydraulic distributor DE placed in the tractor cabin ( or truck)
This command by hydraulic distributor, will be replaced by one: solenoid valve, in the case of a pneumatic circuit.

Ce nouveau système de bloquage des roues, par vérins, nécessaire pour bloquer les roues pendant la marche arrière1 diffère des systèmes habituels a cheville , parce qu'il peut intervenir à tout moment .Zontrairement à ça, l'enclanchement du système courar a cheville, demande l'alignement bien droit des roues du véhicule. This new locking system of the wheels, by jacks, necessary to lock the wheels during reverse1 differs from the usual ankle systems, because it can intervene at any time. Unlike this, the engagement of the ankle courar system, requires straight alignment of the vehicle wheels.

Pendant la marche avant des éssieux suiveurs équipés du circuit concerné par ce-brevet,une faible pression hydraulique C 1-C 2 provenant de la sphère accumulateur(33) ou régulateur pneumatique(lO),est utilisée pour stabiliser, avec r8le d'amortisseur et correcteur,la marche des roues sur chemins bosselés et en devers.During the forward movement of the main followers fitted with the circuit concerned by this patent, a low hydraulic pressure C 1-C 2 coming from the accumulator sphere (33) or pneumatic regulator (10), is used to stabilize, with the role of shock absorber and corrector, the running of the wheels on bumpy paths and on slopes.

La Fig.4 du schéma 3/3,montre la vue d'ensemble d'une remorque agraire en virage,equipée d'un éssieu fixe A.Fig. 4 of diagram 3/3, shows the overall view of an agricultural trailer when cornering, equipped with a fixed axle A.

et d'un éssieu auto-directeur F. avec des verins V.A.de
marche-avant,et des verins V.R. de marche-arrière,disposés
ainsi pour obtenir,grâce au principe de distribution
(ici hydraulique)faisant l'objet de la demande de brevet,
un fonctionnement marche-avant,marche-arrière perfect. and a self-directing structure F. with VAde cylinders
forward, and VR reverse jacks, arranged
so to get, thanks to the principle of distribution
(here hydraulic) which is the subject of the patent application,
perfect forward-reverse operation.

REFERENCES DES APPAREILS POUVANT ETRE UTILISES DANS LE
DESCRIPTIF DU SCHEMA DE DISTRIBUTION PNEUMATtQUE(Fig.1)
POUR LE FONCTIONNEMENT DE L'ESSIEU AUT.DIR.TONARELLI
(1)VALVE DE BARRAGE AVEC RETOUR TOTALE,TAREE A 5,5 BAR
REF.WABCO.434.100.023.0
(2)CLAPET ANTI-RETOUR REF.WABCO 534.001.100.0
(3)ELECTRO-DISTRIBUTEUR REF.WABCO 572.607.022.0, OU
572.740.022.O,AVEC SILENCIEUX D'ECHAPPEMENT REF.8993809904.REFERENCES OF APPARATUS THAT CAN BE USED IN THE
DESCRIPTION OF THE PNEUMATIC DISTRIBUTION DIAGRAM (Fig. 1)
FOR THE OPERATION OF THE AUT.DIR.TONARELLI AXLE
(1) DAM VALVE WITH TOTAL RETURN, TARE TO 5.5 BAR
REF.WABCO.434.100.023.0
(2) NON-RETURN VALVE REF.WABCO 534.001.100.0
(3) ELECTRO-DISTRIBUTOR REF.WABCO 572.607.022.0, OR
572.740.022.O, WITH EXHAUST MUFFLER REF.8993809904.

(4)CANALISATION DE PRESSION PNEUMATIQUE DE MARCHE AV. (4) FORWARD AIR PRESSURE PRESSURE.

(5)CANALISATION DE PRESSION PNEUMATIQUE DE MARCHE AR. (5) PNEUMATIC REVERSE PRESSURE PIPING.

(6 > CANALISATION DE PRESSION CONSTANTE,ALLANT AU ROBINET(8)
POUR BLOQUAGE EXCEPTIONNEL DE L'ESSIEU,REF.WABCO 1580520008
(AVEC ECHAPPEMENT)OU A L'ELECTRO VANNE DE REMPLACEMENT, .PILOTEE DEPUIS LA CABINE. (F CULTATIF)
(7)SELECTEUR DE CYRCUIT REF.WABCO 771.140.000.8
(9)CABLE ELECTRIQUE DE COMMANDE ELECTRO-DISTRIBUTEUR,
EN LIAISON AVEC LE CONTACTEUR B/V FEU DE RECUL DU VEHICULE
TRACTEUR.(6> CONSTANT PRESSURE PIPING, GOING TO TAP (8)
FOR EXCEPTIONAL AXLE LOCK, REF.WABCO 1580520008
(WITH EXHAUST) OR TO THE REPLACEMENT ELECTROVALVE, .PILOTED FROM THE CAB. (F CULTATIVE)
(7) CYCUIT SELECTOR REF.WABCO 771.140.000.8
(9) ELECTRICAL DISTRIBUTOR CONTROL CABLE,
IN CONNECTION WITH CONTACTOR B / V VEHICLE BACKUP LIGHT
TRACTOR.

(lO)VALVE DE LIMITATION DE PRESSION REF.WABCO 164.469.0008.  (lO) PRESSURE LIMITATION VALVE REF.WABCO 164.469.0008.

RECULE A 1,5 BAR(OU SELON UTILISATION) AVEC FONCTION DE
REGULATEUR DE MARCHE.REDUCES TO 1.5 BAR (OR DEPENDING ON USE) WITH
MARKET REGULATOR.

(ll)BOITIER DE PROTECTION DES APPAREILS. (ll) DEVICE PROTECTION CASE.

(12)CANALISATION DE REGULATION OU DE BLOCAGE (SELON)
(13)CANALISATION DE BLOQUAGE.(12) REGULATION OR LOCKING PIPE (AS PER)
(13) LOCKING PIPING.

NOTA:POUR CES APPAREILS,VOIR CATALOGUES WABCO FREINAGE
ET WABCO INDUSTRIE. NOTE: FOR THESE DEVICES, SEE WABCO BRAKING CATALOGS
AND WABCO INDUSTRIE.

Claims (8)

REVENDICATIONS l.Dispositif de commande,pour le fonctionnement à terme, d'un essieu (15)et(2l)auto-directeur marche avant marche arrière,caractérisé en ce que,il comporte des moyens combinés et un double pilotage,pour obtenir,avec l'utilisation de pressions pneumatiques ou hydrauliques,l'alternance de ce fonctionnement.l.Control device for the long-term operation of a self-steering axle (15) and (2l) forward forward reverse, characterized in that, it comprises combined means and a dual control, to obtain, with the use of pneumatic or hydraulic pressures, alternating this operation. 2.Dispositif de commande,selon revendication l,caracterisé en ce queues pressions d'air (ou hydrauliques) produites par un compresseur (ou pompe),sont gérées par un électro-distributeur a double pilotage (3)et(D.E), dans le but de maintenir sous pression en alternance, les verins V.A ou V.R,selon que le véhicule avance,ou qu'il recule.2. Control device according to claim 1, characterized in that the air pressure (or hydraulic) tails produced by a compressor (or pump) are managed by a dual-control solenoid valve (3) and (DE), in the aim of maintaining alternately pressurized, the VA or VR cylinders, depending on whether the vehicle is moving forward or whether it is reversing. 3.Dispositif de commande selon revendications l,et 2, caracterisé en ce que,des clapets anti-retour(2),sont utilisés pour maintenir en pression,le circuit pneumatique (ou hydraulique),même si en amont de ce circuit, une baisse de cette pression,venait à se produire.3. Control device according to claims 1 and 2, characterized in that non-return valves (2) are used to maintain the pneumatic (or hydraulic) circuit under pressure, even if upstream of this circuit, a drop in this pressure, happened to happen. 4.Dispositif de commande selon revendications 1,2 et 3,caractérisé en ce que,le fonctionnement de double pilotage de l'électro-distributeur (3)et(D.E),slobtient manuellement,ou automatiquement par le cable d'alimentation électrique (9),relayé au contacteur pour l'allumage du feu de recul,situé (d'origine)dans la boite a vitesses, du véhicule tracteur.4. Control device according to claims 1, 2 and 3, characterized in that, the dual control operation of the solenoid valve (3) and (DE), is achieved manually, or automatically by the power supply cable ( 9), relayed to the switch for switching on the reversing light, located (original) in the gearbox, of the towing vehicle. 5.Dispositif de commande selon revendications 1,2,3,et4, caractérisé en ce que,les canalisations(4)et(A.V),alimentent depuis l'élecro-distributeur les verins V.A,de marche avant,et les canalisations (5)et(A.R) ,alimentent séparement depuis ce même électro-distributeur,les verins de marche arrière V.R5. Control device according to claims 1,2,3, and 4, characterized in that, the pipes (4) and (AV), supply from the electro-distributor the VA cylinders, forwards, and the pipes (5 ) and (AR), feed separately from this same solenoid valve, the VR reverse cylinders 6.Dispositif de commande selon revendications 1,2,3, 4,et 5,caractérisé en ce que,une canalisation (6)et(B.L), sont prévues pour alimenter indépendemment de l'electro- distributeur,ou bien la totalité des verins(V.A/V.R) dans le but de bloquer le fonctionement de l'essieu auto-directeur,par le robinet (8);;ou bien pour alimenter d'une faible pression,provenant du régulateur de pression (lO)et(33),1es verins arriere-V.R,et ainsi contrôler le débattement accidentel des roues,pendant la marche avant du véhicule.6. Control device according to claims 1, 2, 3, 4, and 5, characterized in that, a pipe (6) and (BL), are provided to supply independently of the electro-distributor, or else all of the cylinders (VA / VR) for the purpose of blocking the operation of the self-steering axle, by the tap (8);; or to supply a low pressure, coming from the pressure regulator (lO) and (33 ), The rear-VR cylinders, and thus control the accidental travel of the wheels, during the forward movement of the vehicle. 7.Dispositif de commande selon revendications 1,2,3, 4,5 et 6,caractérise en ce que,les sélecteurs de circuit (7),sont prévus pour alimenter selon la plus forte pression, les verins ,avant(V.A) ou arrière(V.R)ou avant et arrière, selon les exigences du fonctionnement demandé.7. Control device according to claims 1,2,3, 4,5 and 6, characterized in that, the circuit selectors (7) are provided for supplying, at the highest pressure, the cylinders, front (VA) or rear (VR) or front and rear, depending on the requirements of the requested operation. 8.Dispositif de commande selon revendications 6 et 7, pouvant étré utilisé sur des éssieux simplement suiveurs, Fig.-3,dans le but d'obtenir le bloquage des roues,ou bien de retenir leurs vibrations sur des revêtements routiers irréguliers. 8. Control device according to claims 6 and 7, which can be used on simply following axles, Fig.-3, in order to obtain the locking of the wheels, or else to retain their vibrations on irregular road surfaces.
FR8904867A 1989-04-07 1989-04-07 Combined controls device for a self-steering or follower axle of an agricultural or road vehicle Revoked FR2645492A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR8904867A FR2645492A1 (en) 1989-04-07 1989-04-07 Combined controls device for a self-steering or follower axle of an agricultural or road vehicle
IT16702A IT1242452B (en) 1989-04-07 1990-04-04 DEVICE OF COMBINED CONTROLS TO OBTAIN DIRECTIONAL OPERATION FORWARD / FORWARD OF A SELF-STEERING AXLE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8904867A FR2645492A1 (en) 1989-04-07 1989-04-07 Combined controls device for a self-steering or follower axle of an agricultural or road vehicle

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FR2645492A1 true FR2645492A1 (en) 1990-10-12

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IT (1) IT1242452B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2790436A1 (en) * 1999-03-02 2000-09-08 Bennes Maupu Self steering axle for vehicle hopper trailer has hydraulic hitch arm control cylinder connected to brake cylinders mounted on axles
FR2859440A1 (en) * 2003-09-04 2005-03-11 Kuhn Huard Sa Steering axle for e.g. semi-trailer, has safety device including hydraulic accumulator with fluid under pressure that flows into chambers for extending two jacks during power cut of control circuit, to place axle in straight line position
FR2882325A1 (en) * 2005-02-23 2006-08-25 Le Bollan Sarl Soc D Expl Des Front and rear steering bars controlling device for e.g. agriculture tractor, has electronic unit automatically controlling power pack and solenoid valves to block rear and front bars when vehicle moves reverse and forward, respectively

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1225481A (en) * 1966-12-14 1971-03-17
GB1244914A (en) * 1968-01-19 1971-09-02 Bruno Ceshci Self-steering axle for load carrying vehicles
FR2304486A1 (en) * 1975-03-18 1976-10-15 Tomarelli Giovanni Self tracking rear wheels for trailer - has wheels pivoted on axle and steered by hydraulic reaction elements
BE904155A (en) * 1986-02-03 1986-05-29 Constructiewerken En Landbouwm Self-steering trailer rear wheel lock - has track rod fixed to piston rods of hydraulic cylinders on axle beam with cylinders connected via valve closable to lock wheels
FR2595312A1 (en) * 1986-03-07 1987-09-11 Maupu Sarl Bennes Set of axles intended to equip skips of medium and large tonnage
GB2202811A (en) * 1987-03-21 1988-10-05 Sansavini Bertozzi Fabrizio Self-steering axle for forward and reverse motion, particularly for lorries, trailers, articulated vehicles and the like

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1225481A (en) * 1966-12-14 1971-03-17
GB1244914A (en) * 1968-01-19 1971-09-02 Bruno Ceshci Self-steering axle for load carrying vehicles
FR2304486A1 (en) * 1975-03-18 1976-10-15 Tomarelli Giovanni Self tracking rear wheels for trailer - has wheels pivoted on axle and steered by hydraulic reaction elements
BE904155A (en) * 1986-02-03 1986-05-29 Constructiewerken En Landbouwm Self-steering trailer rear wheel lock - has track rod fixed to piston rods of hydraulic cylinders on axle beam with cylinders connected via valve closable to lock wheels
FR2595312A1 (en) * 1986-03-07 1987-09-11 Maupu Sarl Bennes Set of axles intended to equip skips of medium and large tonnage
GB2202811A (en) * 1987-03-21 1988-10-05 Sansavini Bertozzi Fabrizio Self-steering axle for forward and reverse motion, particularly for lorries, trailers, articulated vehicles and the like

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2790436A1 (en) * 1999-03-02 2000-09-08 Bennes Maupu Self steering axle for vehicle hopper trailer has hydraulic hitch arm control cylinder connected to brake cylinders mounted on axles
FR2859440A1 (en) * 2003-09-04 2005-03-11 Kuhn Huard Sa Steering axle for e.g. semi-trailer, has safety device including hydraulic accumulator with fluid under pressure that flows into chambers for extending two jacks during power cut of control circuit, to place axle in straight line position
FR2882325A1 (en) * 2005-02-23 2006-08-25 Le Bollan Sarl Soc D Expl Des Front and rear steering bars controlling device for e.g. agriculture tractor, has electronic unit automatically controlling power pack and solenoid valves to block rear and front bars when vehicle moves reverse and forward, respectively

Also Published As

Publication number Publication date
IT1242452B (en) 1994-03-04
IT9016702A1 (en) 1991-10-04
IT9016702A0 (en) 1990-04-04

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