FR2753161A1 - Device for controlling a steering force of agricultural trailer wheels, comprises a dual-effect hydraulic actuator having a piston rod positioned relative to a position of the trailer and a chamber, a second actuator, and pipes - Google Patents

Device for controlling a steering force of agricultural trailer wheels, comprises a dual-effect hydraulic actuator having a piston rod positioned relative to a position of the trailer and a chamber, a second actuator, and pipes Download PDF

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Publication number
FR2753161A1
FR2753161A1 FR9611013A FR9611013A FR2753161A1 FR 2753161 A1 FR2753161 A1 FR 2753161A1 FR 9611013 A FR9611013 A FR 9611013A FR 9611013 A FR9611013 A FR 9611013A FR 2753161 A1 FR2753161 A1 FR 2753161A1
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Prior art keywords
trailer
actuator
piston rod
pipes
chamber
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Granted
Application number
FR9611013A
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French (fr)
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FR2753161B1 (en
Inventor
Rene Joseph Marie Bihan
Eric Thierry Luc G Clarinval
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CLARINVAL FRERES
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CLARINVAL FRERES
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Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D13/00—Steering specially adapted for trailers
    • B62D13/02—Steering specially adapted for trailers for centrally-pivoted axles
    • B62D13/025—Steering specially adapted for trailers for centrally-pivoted axles the pivoted movement being initiated by the coupling means between tractor and 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)

Abstract

The device for controlling a steering force of agricultural trailer wheels, comprises a dual-effect hydraulic actuator having a piston rod positioned relative to a position of the trailer and a chamber, a second actuator, and pipes. The actuators (4, 5) have a body different from the trailer body. The piston rod is moved at two ends of the body so as to rotate the trailer wheels. The pipes (9, 10) are shifted by a closed valve (17) for transferring a hydraulic fluid through an opening from one piston to the other. Each actuator has an opening at each of their ends.

Description

La présente invention est relative à un dispositif de commande du braquage des roues d'une remorque et plus particulièrement, mais non exclusivement, d'une remorque agricole. The present invention relates to a device for controlling the steering of the wheels of a trailer and more particularly, but not exclusively, of an agricultural trailer.

II est connu, à partir du véhicule tracteur de commander le braquage des roues de la remorque. A cet effet, on utilise deux vérins hydrauliques à double effet reliés entre eux par deux canalisations de façon que le déplacement du piston de l'un des vérins détermine le déplacement du piston de l'autre vérin. It is known from the towing vehicle to control the turning of the trailer wheels. For this purpose, two double-acting hydraulic cylinders are used which are connected together by two pipes so that the displacement of the piston of one of the cylinders determines the displacement of the piston of the other cylinder.

L'un des vérins, dénommé "vérin émetteur" est disposé entre la remorque et le tracteur, il s'articule par son corps sur la remorque et par l'extrémité de sa tige de piston sur le tracteur en un point distinct de celui d'accrochage de ladite remorque sur ledit tracteur. One of the cylinders, called "emitter cylinder" is placed between the trailer and the tractor, it is articulated by its body on the trailer and by the end of its piston rod on the tractor at a point distinct from that of hooking of said trailer on said tractor.

De cette façon, lorsque le tracteur commence à décrire une courbe la distance entre les deux points d'accrochage du vérin est modifiée, le piston se déplace et chasse de l'huile dans la chambre correspondante du second vérin, ou "vérin récepteur", dont le corps est fixé au bâti de la remorque. Le déplacement de l'extrémité de la tige du vérin récepteur est utilisé pour commander le braquage de l'une des roues de la remorque. Une tringlerie appropriée permet de transmettre l'ordre de braquage à la seconde roue de la remorque. In this way, when the tractor begins to describe a curve, the distance between the two attachment points of the cylinder is modified, the piston moves and drives oil into the corresponding chamber of the second cylinder, or "receiving cylinder", whose body is fixed to the frame of the trailer. The displacement of the end of the rod of the receiving cylinder is used to control the turning of one of the wheels of the trailer. A suitable linkage makes it possible to transmit the turning order to the second wheel of the trailer.

Ce dispositif simple, connu sous le nom de "remorque à essieu directionnel forcé" est très efficace mais il présente, toutefois, certains inconvénients. This simple device, known under the name of "trailer with forced steering axle" is very effective but it has, however, certain drawbacks.

Le braquage du véhicule tracteur, dans un sens ou dans l'autre, ne produit pas les mêmes effets sur la remorque. Turning the towing vehicle in one direction or the other does not have the same effect on the trailer.

Le remplissage des circuits hydrauliques et le réglage sont très délicats.  The filling of the hydraulic circuits and the adjustment are very delicate.

Si la remorque comporte deux essieux il faut utiliser deux vérins émetteurs avec tous les problèmes que cela représente quant à leur fixation. If the trailer has two axles, it is necessary to use two emitting cylinders with all the problems that this represents as regards their fixing.

Enfin, il est très difficile d'accoupler, à nouveau, une remorque à un tracteur. En effet, il est quasiment impossible, lors d'un nouvel accouplement, que la position de la remorque par rapport au tracteur soit identique à celle qu'elle avait précédemment. De ce fait il est nécessaire de déplacer la tige du piston du vérin émetteur, mais ce déplacement est impossible car cela impliquerait que la tige du vérin récepteur puisse se déplacer librement, or celle-ci est bloquée par l'inertie du poids de la remorque. Dans la pratique, il est donc nécessaire de soulever la remorque de façon à ce que les roues puissent pivoter librement sans s'opposer au déplacement du piston du vérin récepteur. Finally, it is very difficult to couple a trailer to a tractor again. Indeed, it is almost impossible, during a new coupling, that the position of the trailer relative to the tractor is identical to that which it had previously. Therefore it is necessary to move the piston rod of the sending cylinder, but this movement is impossible because it would imply that the rod of the receiving cylinder can move freely, but it is blocked by the inertia of the trailer weight . In practice, it is therefore necessary to lift the trailer so that the wheels can pivot freely without opposing the movement of the piston of the receiving cylinder.

La présente invention, qui remédie à ces inconvénients, est remarquable en ce que les deux vérins, émetteur et récepteur, présentent une tige de piston qui s'étend de part et d'autre du piston et traverse les deux extrémités du corps. The present invention, which overcomes these drawbacks, is remarkable in that the two jacks, transmitter and receiver, have a piston rod which extends on either side of the piston and crosses the two ends of the body.

De cette disposition ressort un avantage important : les deux roues de la remorque peuvent être commandées directement par le vérin récepteur. An important advantage of this arrangement is that the two wheels of the trailer can be controlled directly by the receiving cylinder.

II est possible de réaliser deux circuits hydrauliques ayant rigoureusement la même capacité même si les vérins présentent des diamètres différents pour des courses différentes. It is possible to produce two hydraulic circuits having rigorously the same capacity even if the jacks have different diameters for different strokes.

Selon une autre caractéristique de l'invention, des moyens sont prévus pour permettre à l'huile contenue d'un côté du piston de passer de l'autre côté. Cette disposition, particulièrement importante permet, notamment, de réaliser sans problème l'accouplement de la remorque au tracteur. According to another characteristic of the invention, means are provided to allow the oil contained on one side of the piston to pass to the other side. This particularly important arrangement makes it possible, in particular, to carry out the coupling of the trailer to the tractor without any problem.

La présente invention sera mieux comprise par la description qui va suivre faite en se référant au dessin annexé à titre d'exemple indicatif, seulement, sur lequel
-la figure 1 est une vue de dessus schématique d'une remorque attelée à un véhicule tracteur utilisant le dispositif de l'invention;
-la figure 2 est le schéma hydraulique du dispositif;
-la figure 3 schématise l'application du dispositif de l'invention à une remorque à deux essieux.The present invention will be better understood from the description which follows, given with reference to the accompanying drawing, by way of indicative example only, in which
FIG. 1 is a schematic top view of a trailer coupled to a tractor vehicle using the device of the invention;
FIG. 2 is the hydraulic diagram of the device;
FIG. 3 shows diagrammatically the application of the device of the invention to a two-axle trailer.

En se reportant au dessin, on voit que les références 1 et 2 désignent le tracteur et la remorque dont la flèche 2a est acccrochée en 3 audit tracteur. Referring to the drawing, it can be seen that the references 1 and 2 designate the tractor and the trailer whose arrow 2a is hooked at 3 to said tractor.

De la façon connue, 4 désigne le vérin émetteur et 5 le vérin récepteur. Le corps du vérin 4 est articulé en 6 sur la flèche tandis que l'extrémité de la tige de piston est articulée en 7 sur le tracteur. Le corps du vérin 5 est fixé au châssis de la remorque (cette fixation n'est pas représentée). L'extrémité de la tige de piston du vérin 5 commande le pivotement d'un levier 8 de support de la fusée de la roue de la remorque. In the known manner, 4 designates the sending cylinder and 5 the receiving cylinder. The cylinder body 4 is articulated at 6 on the boom while the end of the piston rod is articulated at 7 on the tractor. The body of the jack 5 is fixed to the chassis of the trailer (this fixing is not shown). The end of the piston rod of the jack 5 controls the pivoting of a lever 8 for supporting the stub axle of the trailer wheel.

De la façon connue, aussi, chaque chambre du vérin 4 est reliée à celle correspondante du vérin 5 par des canalisations respectivement 9 et 10. In the known manner, too, each chamber of the jack 4 is connected to that corresponding to the jack 5 by pipes 9 and 10 respectively.

Selon l'invention, la tige de piston, respectivement 11 et 12, de chaque vérin s'étend de part et d'autre du piston et traverse les deux extrémités du corps. According to the invention, the piston rod, respectively 11 and 12, of each cylinder extends on either side of the piston and passes through the two ends of the body.

Un avantage de cette disposition apparaît clairement sur la figure 1 : possibilité de commander directement les deux roues de la remorque. An advantage of this arrangement is clearly shown in Figure 1: possibility of directly controlling the two wheels of the trailer.

Un autre avantage apparaît sur la figure 3 possibilité de commander une remorque à deux essieux à partir d'un vérin émetteur unique 13. Le vérin 13, qui se monte comme le vérin 4, présente une séparation médiane 14, traversée par la tige 15 sur laquelle sont montés deux pistons 16. Chaque piston délimite deux chambres reliées à celles correspondantes du vérin récepteur, 5a ou 5b, de la remorque par des canalisations analogues à celles 9 et 10. Another advantage appears in FIG. 3 possibility of controlling a two-axle trailer from a single emitter cylinder 13. The cylinder 13, which is mounted like the cylinder 4, has a median separation 14, crossed by the rod 15 on which are mounted two pistons 16. Each piston defines two chambers connected to those corresponding to the receiving jack, 5a or 5b, of the trailer by pipes similar to those 9 and 10.

Si le vérin 13 présentait deux séparations il serait possible de commander une remorque comportant trois essieux. If the cylinder 13 had two partitions, it would be possible to order a trailer comprising three axles.

Selon une caractéristique importante de l'invention, les canalisations 9 et 10 sont shuntées par une vanne 17, normalement fermée. According to an important characteristic of the invention, the pipes 9 and 10 are bypassed by a valve 17, normally closed.

Lorsque la vanne 17 est ouverte, il est possible de faire passer l'huile située dans une chambre dans l'autre chambre. When the valve 17 is open, it is possible to pass the oil located in one room into the other room.

Cette disposition est particulièrement avantageuse pour effectuer les réglages et permettre l'accouplement du vérin émetteur au tracteur. This arrangement is particularly advantageous for making the adjustments and allowing the emitting cylinder to be coupled to the tractor.

Après avoir rempli les deux circuits, on ouvre la vanne 17 et on fait avancer le tracteur et sa remorque en ligne droite, les roues de la remorque s'alignent automatiquement et les deux volumes d'huile contenus dans les deux circuits hydrauliques s'équilibrent. After filling the two circuits, the valve 17 is opened and the tractor and its trailer are moved forward in a straight line, the wheels of the trailer align automatically and the two volumes of oil contained in the two hydraulic circuits are balanced .

On ferme la vanne 17 : les réglages sont effectués.The valve 17 is closed: the adjustments are made.

Lorsqu'on désire atteler de nouveau la remorque derrière le tracteur, on ouvre la vanne 17, ce qui autorise le transfert d'huile de la chambre 4a dans celle 4b, ou inversement. Dans ces conditions, la manoeuvre de la tige de piston du vérin émetteur ne pose aucun problème. When it is desired to couple the trailer behind the tractor again, the valve 17 is opened, which authorizes the transfer of oil from chamber 4a to chamber 4b, or vice versa. Under these conditions, the operation of the piston rod of the emitting cylinder poses no problem.

L'invention prévoit aussi des moyens permettant d'effectuer, sans problème, le remplissage des deux circuits. The invention also provides means enabling the filling of the two circuits to be carried out without problem.

La pompe hydraulique 18, usuelle, est reliée à chacun des circuits par l'entremise de clapets anti-retour 19 montés respectivement sur les canalisations 20 et 21. De préférence et comme cela ressort du dessin, la vanne 17 est montée en dérivation sur les canalisations 20 et 21 en aval des clapets 19 par rapport à la pompe 18. Le dispositif est complété par un limiteur de pression 22 qui permet de renvoyer le liquide hydraulique vers le réservoir 23 lorsque la pression dépasse une valeur prédéterminée. The usual hydraulic pump 18 is connected to each of the circuits by means of non-return valves 19 mounted respectively on the pipes 20 and 21. Preferably and as shown in the drawing, the valve 17 is mounted bypass on the pipes 20 and 21 downstream of the valves 19 relative to the pump 18. The device is completed by a pressure limiter 22 which makes it possible to return the hydraulic fluid to the reservoir 23 when the pressure exceeds a predetermined value.

Selon l'invention, chaque vérin présente un orifice de purge à chacune de ses extrémités. According to the invention, each cylinder has a drain orifice at each of its ends.

Pour remplir les circuits, on ouvre tous les orifices de purge et on actionne la pompe 18. Au fur et à mesure que les différentes chambres se remplissent, on ferme l'orifice de purge correspondant. To fill the circuits, all the bleed orifices are opened and the pump 18 is actuated. As the different chambers are filled, the corresponding bleed orifice is closed.

Ensuite, on ouvre la vanne 17 et on fait avancer l'ensemble en ligne droite pour équilibrer les circuits et on referme ladite vanne. Then, the valve 17 is opened and the assembly is advanced in a straight line to balance the circuits and the said valve is closed.

Dans le cas où la remorque comporte deux essieux, il est nécessaire d'utiliser deux vannes 17, une par vérin récepteur.  In the case where the trailer has two axles, it is necessary to use two valves 17, one for each receiving cylinder.

Claims (3)

REVENDICATIONS 1-Dispositif de commande du braquage forcé des roues d'une remorque du genre de ceux comportant un vérin hydraulique à double effet dont la position du piston dépend de la position relative du tracteur et de la remorque et dont chaque chambre communique avec la chambre correspondante d'un second vérin, analogue au premier, dont le corps est rendu solidaire du châssis de la remorque et dont le déplacement de la tige de piston est susceptible de faire pivoter les roues de la remorque, caractérisé en ce que la tige de piston de chacun des vérins (4 et 5) s'étend de part et d'autre du piston, usuel, et traverse les deux extrémités du corps. 1-Device for controlling the forced turning of the wheels of a trailer of the type of those comprising a double-acting hydraulic cylinder whose position of the piston depends on the relative position of the tractor and of the trailer and each chamber of which communicates with the corresponding chamber a second cylinder, similar to the first, the body of which is made integral with the chassis of the trailer and the displacement of the piston rod of which is capable of pivoting the wheels of the trailer, characterized in that the piston rod of each of the cylinders (4 and 5) extends on either side of the usual piston, and passes through the two ends of the body. 2-Dispositif selon la revendication 1, caractérisé en ce que les canalisations (9 et 10) sont shuntées par une vanne (17) normalement fermée mais permettant par son ouverture de transférer du fluide hydraulique d'un côté à l'autre du piston. 2-Device according to claim 1, characterized in that the pipes (9 and 10) are shunted by a valve (17) normally closed but allowing by its opening to transfer hydraulic fluid from one side to the other of the piston. 3-Dispositif selon l'une quelconque des revendications 1 et 2, caractérisé en ce que chaque vérin présente un orifice de purge à chacune de ses extrémités.  3-Device according to any one of claims 1 and 2, characterized in that each cylinder has a drain orifice at each of its ends.
FR9611013A 1996-09-10 1996-09-10 DEVICE FOR CONTROLLING THE STEERING OF THE WHEELS OF A TRAILER Expired - Fee Related FR2753161B1 (en)

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FR9611013A FR2753161B1 (en) 1996-09-10 1996-09-10 DEVICE FOR CONTROLLING THE STEERING OF THE WHEELS OF A TRAILER

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FR9611013A FR2753161B1 (en) 1996-09-10 1996-09-10 DEVICE FOR CONTROLLING THE STEERING OF THE WHEELS OF A TRAILER

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FR2753161B1 FR2753161B1 (en) 1998-10-09

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Cited By (8)

* 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
FR2828532A1 (en) * 2001-08-08 2003-02-14 Hydro Techma Trailer with steerable rear wheels linked hydraulically to towing vehicle has cylinder with sliding sleeve and ring of locking balls
NL1034161C2 (en) * 2007-04-27 2008-10-28 Transp Industry Dev Ct Bv Steering.
EP2072375A2 (en) * 2007-12-21 2009-06-24 Josef Scharmüller Forced steering system
WO2010041927A1 (en) * 2008-10-10 2010-04-15 Transport Industry Development Centre B.V. Steering system
EP2191988A1 (en) * 2008-11-26 2010-06-02 Josef Scharmüller Forced steering
FR2955306A1 (en) * 2010-01-20 2011-07-22 Mauguin Citagri DEVICE FOR ALIGNING A ROLLER AND METHOD THEREOF
WO2012066219A1 (en) * 2010-11-19 2012-05-24 Envision Vehicle Engineering Novasio Technology - Event Rotary control device for a trailer steered axle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2200739A1 (en) * 1972-01-07 1973-07-19 Warsteiner Achsenfab Heinrich SELF-LEVELING TRAILER AXLE ARRANGEMENT
WO1995015273A1 (en) * 1993-12-03 1995-06-08 Robert Dennison A semi-trailer command steering system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2200739A1 (en) * 1972-01-07 1973-07-19 Warsteiner Achsenfab Heinrich SELF-LEVELING TRAILER AXLE ARRANGEMENT
WO1995015273A1 (en) * 1993-12-03 1995-06-08 Robert Dennison A semi-trailer command steering system

Cited By (11)

* 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
FR2828532A1 (en) * 2001-08-08 2003-02-14 Hydro Techma Trailer with steerable rear wheels linked hydraulically to towing vehicle has cylinder with sliding sleeve and ring of locking balls
NL1034161C2 (en) * 2007-04-27 2008-10-28 Transp Industry Dev Ct Bv Steering.
EP1985526A1 (en) 2007-04-27 2008-10-29 Transport Industry Development Centre B.V. Steering system
EP2072375A2 (en) * 2007-12-21 2009-06-24 Josef Scharmüller Forced steering system
EP2072375A3 (en) * 2007-12-21 2009-12-23 Josef Scharmüller Forced steering system
WO2010041927A1 (en) * 2008-10-10 2010-04-15 Transport Industry Development Centre B.V. Steering system
EP2191988A1 (en) * 2008-11-26 2010-06-02 Josef Scharmüller Forced steering
FR2955306A1 (en) * 2010-01-20 2011-07-22 Mauguin Citagri DEVICE FOR ALIGNING A ROLLER AND METHOD THEREOF
WO2012066219A1 (en) * 2010-11-19 2012-05-24 Envision Vehicle Engineering Novasio Technology - Event Rotary control device for a trailer steered axle
FR2967636A1 (en) * 2010-11-19 2012-05-25 Envision Vehicle Engineering Novasio Technology Event DEVICE FOR ROTATING CONTROL OF A TRAILER DIRECTOR AXLE AND TRAILER COMPRISING SUCH A DEVICE

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FR2753161B1 (en) 1998-10-09

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