EP0370892A1 - Control device for an earth-moving machine - Google Patents

Control device for an earth-moving machine Download PDF

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Publication number
EP0370892A1
EP0370892A1 EP89403201A EP89403201A EP0370892A1 EP 0370892 A1 EP0370892 A1 EP 0370892A1 EP 89403201 A EP89403201 A EP 89403201A EP 89403201 A EP89403201 A EP 89403201A EP 0370892 A1 EP0370892 A1 EP 0370892A1
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EP
European Patent Office
Prior art keywords
equipment
seat
control
control device
pipes
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EP89403201A
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German (de)
French (fr)
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EP0370892B1 (en
Inventor
André Tatara
Robert Mc Caig
José Andiano
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Case Poclain
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Case Poclain
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Priority to AT89403201T priority Critical patent/ATE77670T1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/08—Servomotor systems incorporating electrically operated control means
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • E02F3/963—Arrangements on backhoes for alternate use of different tools
    • E02F3/964—Arrangements on backhoes for alternate use of different tools of several tools mounted on one machine
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/16—Cabins, platforms, or the like, for drivers
    • E02F9/166—Cabins, platforms, or the like, for drivers movable, tiltable or pivoting, e.g. movable seats, dampening arrangements of cabins
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/2004—Control mechanisms, e.g. control levers
    • E02F9/2012—Setting the functions of the control levers, e.g. changing assigned functions among operations levers, setting functions dependent on the operator or seat orientation

Definitions

  • backhoe loaders comprising two working equipment, hydraulically controlled, from a single control station.
  • the equipment is arranged at the two longitudinal ends of the chassis of the machine, itself provided with driving and / or steering wheels.
  • One of the equipment allowing the work of the earth, and in particular the digging of trenches, requires the immobilization of the machine for its use.
  • the loading equipment requires the operator to drive the machine, since the materials are collected in a bucket before being discharged into a transport vehicle.
  • the control station of the machine is therefore equipped with two groups of levers or the like, corresponding to each of the pieces of equipment, and the operator is seated on a swivel seat, mounted on the platform of the machine.
  • the swivel seat allows the operator to easily access each of the control groups, and in particular the machine's steering wheel when it is necessary to use the loading equipment.
  • the loading equipment must be able to be controlled by one hand, the other being used for driving the machine.
  • the object of the present invention is to improve the conditions of use of machines comprising two working equipment, such as backhoe loaders and, to this end, provides an improved control device.
  • the remote control manipulators of the actuator control valves are mounted on the pivoting part of the operator's seat, and preferably arranged at the ends of the armrests of said seat.
  • a transmission known in itself, constituted by a plurality of control pipes connecting respectively each manipulator and the control valves of the cylinders of the elements of at least one piece of equipment. These pipes are divided into two groups corresponding respectively to the equipment and, for each of the groups, the transmission comprises an "all or nothing" switch whose movable member is slaved to the position of the pivoting part of the operator's seat.
  • the transmission can be either of the electric type, or of the hydraulic or pneumatic type, since its role is only to allow the control, that is to say partial or total opening, of the valves actuator control.
  • the latter as is known, are supplied by a hydraulic fluid under high pressure, the flow rate of which is regulated by the opening of the control valves.
  • the transmission pipes are therefore either electric cables or conduits conveying a control fluid, and the control valves are themselves, either solenoid valves or valves whose opening is controlled hydraulically or pneumatically.
  • the "all or nothing" switch arranged in the transmission will be, as the case may be, a multipolar electric switch whose movable contacts are controlled by the position of the pivoting part of the operator's seat or, on the contrary, a dispenser whose mobile drawer, slaved to the position of the operator's seat, completely closes or opens the ducts connecting the manipulators to the control valves.
  • the control station comprises a seat 1 pivotally mounted on the platform of a public works machine comprising two work equipment schematically and designated by the general references A and B.
  • the seat 1 is oriented towards the equipment A of the "backhoe” type and can at will be oriented towards the equipment B of the "loader” type, by rotation of 180 ° according to the arrow F, around its pivot axis 2.
  • remote control manipulators 5 and 6 are arranged. They allow, under conditions which will be specified below, the control of various elements of the work equipment A and B, that is to say hydraulic cylinders 7, 8, 9 and 10 of equipment A and cylinders 11 and 12 of equipment B.
  • Each of these cylinders is supplied with pressurized hydraulic fluid, respectively by the through the control valves 13, 14, 15 and 16 for equipment A, and 17 and 18 for equipment B.
  • the opening, possibly gradual, of each of these valves is controlled by the operator when he acts on the remote control manipulators 5 and 6.
  • an appropriate transmission is provided between each of the manipulators and the control valves, this transmission being of the electrical type and the valves 13 to 18 being of the electrovalve type.
  • Electrical lines 19 and 20 connect the electrovalves 13 and 14 of equipment A to the manipulator 5, while lines 21 and 22 connect the electrovalves 15 and 16 of equipment A to the manipulator 6.
  • the latter are also connected to solenoid valves 17 and 18 of equipment B via electrical lines 23 and 24.
  • the movable contacts 25 a ensure the continuity of the pipes 19 to 22 when the seat 1 is in its extreme position co corresponding to the use of equipment A. Under the same conditions, the movable contacts 26 a are open, in principle prohibiting any control of the valves 17 and 18 of equipment B.
  • the seat 1 pivots according to the arrow F to come into its second extreme position corresponding to the use of the equipment B, the movable contacts 25 a and 26 a are brought into their position shown in dotted lines in the drawing , thanks to their movable actuating members 27 and 28 whose movement is controlled by the servo line 29 at the position of the seat 1.
  • the equipment A cannot no longer be used.
  • the two manipulators 5 and 6 are used by the operator to control the various elements of the equipment A.
  • the manipulator 6 is connected to the solenoid valves 17 and 18 of the equipment, the manipulator 5 being on the contrary completely neutralized.
  • the operator's left hand is available for other controls of the machine, and in particular for driving it. This is particularly advantageous if the equipment B is, as indicated, of the "charger" type.
  • the lines 21 and 22 of the equipment A and the lines 23 and 24 of the equipment B are connected to the same manipulator 6. It will be advantageous, to facilitate the use of the machine, that in the wherever possible, the pipes of the two devices connected to the same manipulator correspond to similar or identical elements on each of the devices. For example, it will be noted that the two pipes 22 and 24 allowing the control of the solenoid valves 16 and 17 are connected to the manipulator 6; in fact, they correspond to the same element on each piece of equipment, in this case the bucket.
  • At least one of the equipment A and B can be used, even if the seat 1 is not in one of its extreme positions.
  • the equipment A for example, can be used, not only when the position of the seat 1 corresponds to the extreme position shown in the drawing, but also when it is in an intermediate position between this extreme position and the other extreme position corresponding to the use of equipment B.
  • these two extreme positions are angularly distant by 180 °, but this value is in no way mandatory.
  • the mechanical members included in the control line 29 will make it possible to predetermine, for at least one item of equipment, a position of the seat 1 below which this equipment may be used. It will in fact be advantageous, at least as far as the equipment A is concerned, for this predetermined position to be very close to the extreme position corresponding to the normal conditions of use of the equipment B.
  • the seat 1 may be pivoted by at least 150 °, from its position shown in the drawing before the control line 29 controls the passage of the movable contacts 25 a and 26 a from their position in solid lines to their position in dotted lines .
  • an auxiliary control 30 is provided, preferably arranged on one of the armrests of the seat 1, making it possible, via a transmission shown diagrammatically at 31, to cancel the effect of the opening pipes 23 and 24.
  • branches 32 and 33 which are connected on either side of the switch 26.
  • an auxiliary switch 34 whose movable contacts 34 a are normally in the open position, shown in solid lines in the drawing.

Abstract

A control device for use in a dual function machine includes a first disconnecting device for connection between a first operator's control knob and at least one control valve usable for controlling a first function of the machine. A second disconnecting device is provided for connection between a second operator's control knob and at least one second control valve usable for controlling a second function of the machine. The disconnecting devices are arranged for mounting in actuating relationship to a swivel-type operator's seat, the first disconnecting device being actuated for disabling the second function when said seat is in a first position for operating the first function and the second disconnecting device being actuated for disabling the first function when the seat is in a second position for operating the second function.

Description

On connaît des engins de travaux publics, généralement dénommés "chargeuses-pelleteuses", comportant deux équipements de travail, commandés hydrauliquement, à partir d'un unique poste de commande. En général, les équipements sont disposés aux deux extré­mités longitudinales du châssis de l'engin, lui-même muni de roues motrices et/ou directrices. L'un des équipements, permettant le travail de la terre, et notamment le creusement de tranchées, exige l'immobilisation de l'engin pour son utilisation. Au con­traire, l'équipement de chargement nécessite une conduite de l'engin par l'opérateur, puisque les matériaux sont ramassés dans un godet avant d'être déversés dans un véhicule de transport.There are known public works machines, generally called "backhoe loaders", comprising two working equipment, hydraulically controlled, from a single control station. In general, the equipment is arranged at the two longitudinal ends of the chassis of the machine, itself provided with driving and / or steering wheels. One of the equipment, allowing the work of the earth, and in particular the digging of trenches, requires the immobilization of the machine for its use. On the contrary, the loading equipment requires the operator to drive the machine, since the materials are collected in a bucket before being discharged into a transport vehicle.

Le poste de commande de l'engin est donc équipé de deux groupes de leviers ou analogues, correspondant à chacun des équipe­ments, et l'opérateur est assis sur un siège pivotant, monté sur la plateforme de l'engin.The control station of the machine is therefore equipped with two groups of levers or the like, corresponding to each of the pieces of equipment, and the operator is seated on a swivel seat, mounted on the platform of the machine.

Dans chacune de ses positions extrêmes, le siège pivo­tant permet à l'opérateur d'accéder facilement à chacun des groupes de commande, et notamment au volant de direction de l'engin lorsqu'il doit utiliser l'équipement de chargement. Dans ce dernier cas, l'équipement de chargement doit pouvoir être com­mandé par une seule main, l'autre étant utilisée pour la conduite de l'engin.In each of its extreme positions, the swivel seat allows the operator to easily access each of the control groups, and in particular the machine's steering wheel when it is necessary to use the loading equipment. In the latter case, the loading equipment must be able to be controlled by one hand, the other being used for driving the machine.

On rappellera également que, dans ce type d'engin, les divers éléments constituant un équipement sont actionnés par au moins un vérin hydraulique par l'intermédiaire d'une valve de commande, elle-même asservie à la position d'un levier à la dispo­sition de l'opérateur lorsqu'il est assis au poste de commande.It will also be recalled that, in this type of machine, the various elements constituting an item of equipment are actuated by at least one hydraulic cylinder by means of a control valve, itself slaved to the position of a lever at the available to the operator when seated at the control station.

On connaît, d'autre part, des engins de travaux publics, dénommés "pelleteuses", comportant une tourelle supportant un seul équipement de travail et montée pivotante sur un châssis muni d'organes de déplacement, tels que roues ou chenilles. Dans ce cas, le poste de commande de l'engin est fixé sur la tourelle pivo­tante, et l'opérateur dispose généralement de télémanipulateurs permettant de commander respectivement l'équipement de travail ou le déplacement de l'engin.On the other hand, public works machines are known, known as "excavators", comprising a turret supporting a single work equipment and pivotally mounted on a chassis provided with displacement members, such as wheels or tracks. In this case, the control station of the machine is fixed on the pivoting turret, and the operator generally has remote manipulators allowing respectively to control the work equipment or the movement of the machine.

La présente invention a pour objet d'améliorer les condi­tions d'utilisation des engins comportant deux équipements de tra­vail, tels que les chargeuses-pelleteuses et, à cet effet, propose un dispositif de commande perfectionné.The object of the present invention is to improve the conditions of use of machines comprising two working equipment, such as backhoe loaders and, to this end, provides an improved control device.

Selon l'invention, les manipulateurs de télécommande des valves de commande des vérins sont montés sur la partie pivotante du siège de l'opérateur, et disposés de préférence aux extrémités des accoudoirs dudit siège. D'autre part, il existe une transmis­sion, connue en elle-même, constituée par une pluralité de canali­sations de commande reliant respectivement chaque manipulateur et les valves de commande des vérins des éléments d'au moins un équi­pement. Ces canalisations sont réparties en deux groupes corres­pondant respectivement aux équipements et, pour chacun des groupes, la transmission comporte un interrupteur "tout ou rien" dont l'organe mobile est asservi à la position de la partie pivo­tante du siège de l'opérateur.According to the invention, the remote control manipulators of the actuator control valves are mounted on the pivoting part of the operator's seat, and preferably arranged at the ends of the armrests of said seat. On the other hand, there is a transmission, known in itself, constituted by a plurality of control pipes connecting respectively each manipulator and the control valves of the cylinders of the elements of at least one piece of equipment. These pipes are divided into two groups corresponding respectively to the equipment and, for each of the groups, the transmission comprises an "all or nothing" switch whose movable member is slaved to the position of the pivoting part of the operator's seat.

Il convient de souligner dès maintenant que la transmis­sion peut être, soit du type électrique, soit du type hydraulique ou pneumatique, puisque son rôle est uniquement de permettre la commande, c'est-à-dire l'ouverture partielle ou totale, des valves de commande des vérins. Ces derniers, ainsi qu'on le sait, sont alimentés par un fluide hydraulique sous haute pression dont le débit est réglé par l'ouverture des valves de commande.It should be emphasized right now that the transmission can be either of the electric type, or of the hydraulic or pneumatic type, since its role is only to allow the control, that is to say partial or total opening, of the valves actuator control. The latter, as is known, are supplied by a hydraulic fluid under high pressure, the flow rate of which is regulated by the opening of the control valves.

Les canalisations de la transmission sont donc, soit des câbles électriques, soit des conduits véhiculant un fluide de commande, et les valves de commande sont elles-mêmes, soit des électrovalves, soit des valves dont l'ouverture est commandée hydrauliquement ou pneumatiquement.The transmission pipes are therefore either electric cables or conduits conveying a control fluid, and the control valves are themselves, either solenoid valves or valves whose opening is controlled hydraulically or pneumatically.

Dans ces conditions, l'interrupteur "tout ou rien" dispo­sé dans la transmission sera, suivant le cas, un interrupteur élec­trique multipolaire dont les contacts mobiles sont asservis à la position de la partie pivotante du siège de l'opérateur ou, au contraire, un distributeur dont le tiroir mobile, asservi à la position du siège de l'opérateur, obture ou ouvre complètement les conduits reliant les manipulateurs aux valves de commande.Under these conditions, the "all or nothing" switch arranged in the transmission will be, as the case may be, a multipolar electric switch whose movable contacts are controlled by the position of the pivoting part of the operator's seat or, on the contrary, a dispenser whose mobile drawer, slaved to the position of the operator's seat, completely closes or opens the ducts connecting the manipulators to the control valves.

L'invention sera mieux comprise et ses avantages ainsi que diverses caractéristiques secondaires apparaîtront à la lec­ture de la description qui va suivre, d'un mode de réalisation avantageux, dans lequel la transmission est du type électrique. Il va cependant de soi que l'invention n'est pas limitée à ce type de transmission et l'homme de métier transposera facilement les carac­téristiques d'une transmission électrique à une transmission hydraulique ou pneumatique.The invention will be better understood and its advantages as well as various secondary characteristics will appear on reading the description which follows, of an advantageous embodiment, in which the transmission is of the electrical type. It goes without saying, however, that the invention is not limited to this type of transmission and those skilled in the art will easily transpose the characteristics of an electric transmission to a hydraulic or pneumatic transmission.

On se référera dans ce qui suit au dessin joint, dont la figure unique est un schéma d'un dispositif de commande selon l'in­vention, dans le cas particulier d'une transmission électrique.Reference is made in the following to the accompanying drawing, the single figure of which is a diagram of a control device according to the invention, in the particular case of an electrical transmission.

Si l'on se reporte au dessin, on voit tout d'abord que le poste de commande comporte un siège 1 monté pivotant sur la plateforme d'un engin de travaux publics comprenant deux équipe­ments de travail schématisés et désignés par les références générales A et B. Le siège 1 est orienté vers l'équipement A du type "pelleteuse" et peut à volonté être orienté vers l'équipe­ment B du type "chargeur", par rotation de 180° suivant la flèche F, autour de son axe de pivotement 2. Aux extrémités des ac­coudoirs 3 et 4 du siège 1, sont disposés des manipulateurs de télécommande 5 et 6. Ils permettent, dans des conditions que l'on précisera plus loin, la commande de divers éléments des équipe­ments de travail A et B, c'est-à-dire des vérins hydrauliques 7, 8, 9 et 10 de l'équipement A et des vérins 11 et 12 de l'équipe­ment B. Chacun de ces vérins est alimenté en fluide hydraulique sous pression, respectivement par l'intermédiaire des valves de commande 13, 14, 15 et 16 pour l'équipement A, et 17 et 18 pour l'équipement B. L'ouverture, éventuellement progressive, de cha­cune de ces valves, est commandée par l'opérateur lorsqu'il agit sur les manipulateurs de télécommande 5 et 6.If we refer to the drawing, we see first of all that the control station comprises a seat 1 pivotally mounted on the platform of a public works machine comprising two work equipment schematically and designated by the general references A and B. The seat 1 is oriented towards the equipment A of the "backhoe" type and can at will be oriented towards the equipment B of the "loader" type, by rotation of 180 ° according to the arrow F, around its pivot axis 2. At the ends of the armrests 3 and 4 of the seat 1, remote control manipulators 5 and 6 are arranged. They allow, under conditions which will be specified below, the control of various elements of the work equipment A and B, that is to say hydraulic cylinders 7, 8, 9 and 10 of equipment A and cylinders 11 and 12 of equipment B. Each of these cylinders is supplied with pressurized hydraulic fluid, respectively by the through the control valves 13, 14, 15 and 16 for equipment A, and 17 and 18 for equipment B. The opening, possibly gradual, of each of these valves is controlled by the operator when he acts on the remote control manipulators 5 and 6.

A cet effet, il est prévu une transmission appropriée entre chacun des manipulateurs et les valves de commande, cette transmission étant du type électrique et les valves 13 à 18 étant du type électrovalves.To this end, an appropriate transmission is provided between each of the manipulators and the control valves, this transmission being of the electrical type and the valves 13 to 18 being of the electrovalve type.

Des canalisations électriques 19 et 20 relient les électrovalves 13 et 14 de l'équipement A au manipulateur 5, cepen­dant que des canalisations 21 et 22 relient les électrovalves 15 et 16 de l'équipement A au manipulateur 6. A ce dernier sont également reliées les électrovalves 17 et 18 de l'équipement B par les canalisations électriques 23 et 24.Electrical lines 19 and 20 connect the electrovalves 13 and 14 of equipment A to the manipulator 5, while lines 21 and 22 connect the electrovalves 15 and 16 of equipment A to the manipulator 6. The latter are also connected to solenoid valves 17 and 18 of equipment B via electrical lines 23 and 24.

Ainsi, il existe un groupe de canalisations 19 à 22 cor­respondant à l'équipement A, et un deuxième groupe de canalisa­tions 23 et 24 correspondant à l'équipement B. Sur chacun de ces groupes, il est prévu un interrupteur "tout ou rien", du type multipolaire, l'interrupteur correspondant à l'équipement A étant désigné par la référence générale 25, tandis que celui correspon­dant à l'équipement B est désigné par la référence générale 26. L'ensemble des éléments mobiles de commutation électrique ou contacts mobiles 25a de l'interrupteur 25 est attelé à une tringle 27 ou analogue, et il en est de même des contacts mobiles 26a de l'interrupteur 26 liés à une tige de commande 28. Les deux organes mobiles 27 et 28 sont asservis à la position de la partie pivotante du siège 1. Plus précisément, et comme repré­senté sur le dessin, les contacts mobiles 25a assurent la continui­té des canalisations 19 à 22 lorsque le siège 1 est dans sa position extrême correspondant à l'utilisation de l'équipement A. Dans les mêmes conditions, les contacts mobiles 26a sont ouverts, interdisant en principe toute commande des valves 17 et 18 de l'équipement B.Thus, there is a group of pipes 19 to 22 corresponding to the equipment A, and a second group of pipes 23 and 24 corresponding to the equipment B. An "all or nothing" switch is provided on each of these groups. , of the multipolar type, the switch corresponding to the equipment A being designated by the general reference 25, while that corresponding to the equipment B is designated by the general reference 26. All the mobile electrical switching elements or contacts movable 25 a of the switch 25 is coupled to a rod 27 or the like, and the same is true of the movable contacts 26 a of the switch 26 linked to a control rod 28. The two movable members 27 and 28 are controlled at the position of the pivoting part of the seat 1. More precisely, and as shown in the drawing, the movable contacts 25 a ensure the continuity of the pipes 19 to 22 when the seat 1 is in its extreme position co corresponding to the use of equipment A. Under the same conditions, the movable contacts 26 a are open, in principle prohibiting any control of the valves 17 and 18 of equipment B.

Si au contraire, le siège 1 pivote selon la flèche F pour venir dans sa seconde position extrême correspondant à l'utilisation de l'équiement B, les contacts mobiles 25a et 26a sont amenés dans leur position représentée en trait ponctué sur le dessin, grâce à leurs organes mobiles d'actionnement 27 et 28 dont le déplacement est commandé par la ligne d'asservissement 29 à la position du siège 1. Dans cette deuxième position des contacts mobiles 25a et 26a, l'équipement A ne peut plus être utilisé.If on the contrary, the seat 1 pivots according to the arrow F to come into its second extreme position corresponding to the use of the equipment B, the movable contacts 25 a and 26 a are brought into their position shown in dotted lines in the drawing , thanks to their movable actuating members 27 and 28 whose movement is controlled by the servo line 29 at the position of the seat 1. In this second position of the movable contacts 25 a and 26 a , the equipment A cannot no longer be used.

A cet égard, on notera que, dans la position du siège représentée au dessin, les deux manipulateurs 5 et 6 sont utilisés par l'opérateur pour la commande des divers éléments de l'équipe­ment A. Cependant, dans la position du siège correspondant à l'utilisation de l'équipement B, seul le manipulateur 6 est relié aux électrovalves 17 et 18 de l'équipement, le manipulateur 5 étant au contraire totalement neutralisé. Ainsi, la main gauche de l'opérateur est disponible pour d'autres commandes de l'engin, et notamment pour la conduite de celui-ci. Cela est particulièrement avantageux si l'équipement B est, comme on l'a indiqué, du type "chargeur".In this regard, it should be noted that in the position of the seat shown in the drawing, the two manipulators 5 and 6 are used by the operator to control the various elements of the equipment A. However, in the position of the seat corresponding to the use of the equipment B, only the manipulator 6 is connected to the solenoid valves 17 and 18 of the equipment, the manipulator 5 being on the contrary completely neutralized. Thus, the operator's left hand is available for other controls of the machine, and in particular for driving it. This is particularly advantageous if the equipment B is, as indicated, of the "charger" type.

On a déjà signalé que les canalisations 21 et 22 de l'équipement A et les canalisations 23 et 24 de l'équipement B sont reliées au même manipulateur 6. Il sera avantageux, pour faciliter l'utilisation de l'engin que, dans la mesure du pos­sible, les canalisations des deux équipements reliées au même ma­nipulateur correspondent à des éléments analogues ou identiques sur chacun des équipements. Par exemple, on notera que les deux canalisations 22 et 24 permettant la commande des électrovalves 16 et 17 sont reliées au manipulateur 6; elles correspondent en effet, sur chacun des équipements, au même élément, en l'espèce le godet.It has already been pointed out that the lines 21 and 22 of the equipment A and the lines 23 and 24 of the equipment B are connected to the same manipulator 6. It will be advantageous, to facilitate the use of the machine, that in the wherever possible, the pipes of the two devices connected to the same manipulator correspond to similar or identical elements on each of the devices. For example, it will be noted that the two pipes 22 and 24 allowing the control of the solenoid valves 16 and 17 are connected to the manipulator 6; in fact, they correspond to the same element on each piece of equipment, in this case the bucket.

D'autre part, il peut être prévu que l'un au moins des équipements A et B est utilisable, même si le siège 1 n'est pas dans l'une de ses positions extrêmes. Si l'on se référe au dessin, cela veut dire que l'équipement A, par exemple, peut être utilisé, non seulement lorsque la position du siège 1 correspond à la position extrême représentée au dessin, mais également lorsqu'il se trouve dans une position intermédiaire entre cette position extrême et l'autre position extrême correspondant à l'utilistion de l'équiement B. Dans l'exemple représenté, ces deux positions extrêmes sont angulairement distantes de 180°, mais cette valeur n'est nullement obligatoire.On the other hand, it can be provided that at least one of the equipment A and B can be used, even if the seat 1 is not in one of its extreme positions. Referring to the drawing, this means that the equipment A, for example, can be used, not only when the position of the seat 1 corresponds to the extreme position shown in the drawing, but also when it is in an intermediate position between this extreme position and the other extreme position corresponding to the use of equipment B. In the example shown, these two extreme positions are angularly distant by 180 °, but this value is in no way mandatory.

En pratique, les organes mécaniques inclus dans la ligne d'asservissement 29 permettront de prédéterminer, pour au moins un équipement, une position du siège 1 en deçà de laquelle cet équipement pourra être utilisé. Il sera en fait avantageux, au moins en ce qui concerne l'équipement A, que cette position prédéterminée soit très voisine de la position extrême correspon­dant aux conditions normales d'utilisation de l'équipement B. En d'autres termes, le siège 1 pourra être pivoté d'au moins 150°, à partir de sa position représentée au dessin avant que la ligne d'asservissement 29 ne commande le passage des contacts mobiles 25a et 26a de leur position en trait plein à leur position en trait ponctué.In practice, the mechanical members included in the control line 29 will make it possible to predetermine, for at least one item of equipment, a position of the seat 1 below which this equipment may be used. It will in fact be advantageous, at least as far as the equipment A is concerned, for this predetermined position to be very close to the extreme position corresponding to the normal conditions of use of the equipment B. In other words, the seat 1 may be pivoted by at least 150 °, from its position shown in the drawing before the control line 29 controls the passage of the movable contacts 25 a and 26 a from their position in solid lines to their position in dotted lines .

Dans certains cas, il pourrait en être de même lorsque le siège 1 quitte sa position extrême correspondant à l'utilisation de l'équipement B pour aller vers celle représentée sur le dessin.In some cases, it could be the same when the seat 1 leaves its extreme position corresponding to the use of the equipment B to go towards that shown in the drawing.

Il faut enfin souligner que, même lorsque le siège 1 se trouve dans l'une de ses positions extrêmes, par exemple celle représentée au dessin et correspondant à l'utilisation normale de l'équipement A, il peut être utile de permettre exceptionnellement l'utilisation de l'équipement B.Finally, it should be stressed that, even when the seat 1 is in one of its extreme positions, for example that shown in the drawing and corresponding to the normal use of the equipment A, it may be useful to exceptionally allow the use of equipment B.

A cet effet, il est prévu une commande auxiliaire 30, disposée de préférence sur l'un des accoudoirs du siège 1, per­mettant, par l'intermédiaire d'une transmission représentée schéma­tiquement en 31, d'annuler l'effet de l'ouverture des canalisa­tions 23 et 24. Sur chacune de ces dernières, sont disposées des dérivations 32 et 33 qui sont raccordées de part et d'autre de l'interrupteur 26. Sur les dérivations 32 et 33 est monté un interrupteur auxiliaire 34 dont les contacts mobiles 34a sont normalement dans la position ouverte, représentée en trait plein sur le dessin. Lorsque l'on agit sur la commande auxiliaire 30, les contacts mobiles 34a prennent la position représentée en trait ponctué et il est alors possible d'utiliser l'équipement B au moyen du manipulateur 6, bien que les contacts mobiles 26a soient dans la position ouverte, représentée en trait plein.To this end, an auxiliary control 30 is provided, preferably arranged on one of the armrests of the seat 1, making it possible, via a transmission shown diagrammatically at 31, to cancel the effect of the opening pipes 23 and 24. On each of these, there are disposed branches 32 and 33 which are connected on either side of the switch 26. On the branches 32 and 33 is mounted an auxiliary switch 34 whose movable contacts 34 a are normally in the open position, shown in solid lines in the drawing. When the auxiliary control 30 is acted on, the movable contacts 34 a assume the position shown in dotted lines and it is then possible to use the equipment B by means of the manipulator 6, although the movable contacts 26 a are in the open position, shown in solid lines.

Il est évidemment possible d'éviter, pendant cette utili­sation exceptionnelle de l'équipement B, la commande simultanée des éléments de l'équipement A par le manipulateur 6. A cet effet, on disposera, sur les canalisations 21 et 22, un interrupteur secondaire 35 dont les contacts mobiles 35a, normalement dans leur position fermée, seront amenés dans leur position ouverte, représentée en trait ponctué, lorsque l'opérateur agit sur la commande auxiliaire 30. Une transmission secondaire 36 est prévue entre la commande 30 et l'interrupteur secondaire 35.It is obviously possible to avoid, during this exceptional use of the equipment B, the simultaneous control of the elements of the equipment A by the manipulator 6. For this purpose, there will be available, on the pipes 21 and 22, a switch secondary 35 whose movable contacts 35 a , normally in their closed position, will be brought into their open position, shown in dotted line, when the operator acts on the auxiliary control 30. A secondary transmission 36 is provided between the control 30 and the 'secondary switch 35.

Claims (7)

1. Dispositif de commande d'un engin de travaux publics comportant deux équipements de travail (A, B), disposés res­pectivement à deux extrémités, longitudinales et/ou transversales, d'un châssis muni de roues motrices et/ou directrices, chacun des éléments constituant un équipement étant actionné par au moins un vérin hydraulique (7 à 12) par l'intermédiaire d'une valve de commande (13 à 18), cependant que le poste de commande de l'engin comporte un siège (1) pour l'opérateur, monté pivotant sur la plateforme de l'engin entre deux positions extrêmes, caractérisé en ce que les manipulateurs de télécommande (5, 6) des valves de commande des vérins sont montés sur la partie pivotante du siège, et disposés de préférence aux extrémités des accoudoirs dudit siège, cependant qu'il existe une transmission, connue en elle-­même, constituée par une pluralité de canalisations de com­mande (19 à 24) reliant respectivement chaque manipulateur et les valves de commande des vérins des éléments d'au moins un équipe­ment, lesdites canalisations étant réparties en deux groupes (19 à 22 et 23-24) correspondant respectivement à chaque équipement (A et B), ladite transmission comportant en outre, pour chaque groupe de canalisations, un interrupteur "tout ou rien" (25, 26) dont l'organe mobile est asservi à la position de la partie pivo­tante du siège.1. Control device of a public works machine comprising two work equipment (A, B), respectively arranged at two ends, longitudinal and / or transverse, of a chassis provided with driving and / or steering wheels, each of elements constituting an equipment being actuated by at least one hydraulic cylinder (7 to 12) by means of a control valve (13 to 18), while the control station of the machine comprises a seat (1) for the operator, pivotally mounted on the platform of the machine between two extreme positions, characterized in that the remote control manipulators (5, 6) of the actuator control valves are mounted on the pivoting part of the seat, and preferably arranged at the ends of the armrests of said seat, while there is a transmission, known in itself, constituted by a plurality of control pipes (19 to 24) respectively connecting each manipulator and the valves of actuation of the cylinders of the elements of at least one item of equipment, said pipes being divided into two groups (19 to 22 and 23-24) corresponding respectively to each item of equipment (A and B), said transmission further comprising, for each group of pipes , an "all or nothing" switch (25, 26) whose movable member is slaved to the position of the pivoting part of the seat. 2. Dispositif de commande selon la revendication 1, caracté­risé à ce que la transmission est du type électrique et les valves de commande (13 à 18) du type électrovalve, ladite transmission comportant des interrupteurs multipolaires comprenant une plura­lité d'éléments mobiles de commutation électrique (25a, 26a) asser­vis à la position de la partie pivotante du siège (1).2. Control device according to claim 1, characterized in that the transmission is of the electrical type and the control valves (13 to 18) of the solenoid valve type, said transmission comprising multipole switches comprising a plurality of mobile electrical switching elements (25 a , 26 a ) controlled by the position of the swivel part of the seat (1). 3. Dispositif de commande selon la revendication 2, carac­térisé en ce que les canalisations (22 - 24) des électro­valves (16 - 17) correspondant à au moins un groupe de deux élé­ments analogues, par exemple les godets, de chacun des équipements de travail, sont électriquement reliés au même manipulateur de télécommande (6).3. Control device according to claim 2, characterized in that the pipes (22 - 24) of the solenoid valves (16 - 17) corresponding to at least one group of two similar elements, for example the buckets, of each of the working equipment , are electrically connected to the same manipulator remote control (6). 4. Dispositif de commande selon l'une quelconque des reven­dications 2 et 3, caractérisé en ce que le groupement des canali­sations électriques (19 à 24) est réalisé de telle façon que, dans l'une des positions extrêmes du siège pivotant, l'un (5) des manipulateurs de télécommande soit neutralisé.4. Control device according to any one of claims 2 and 3, characterized in that the grouping of the electrical pipes (19 to 24) is carried out so that, in one of the extreme positions of the swivel seat, the one (5) of the remote controls is disabled. 5. Dispositif de commande selon l'une quelconque des reven­dications 2 à 4, caractérisé en ce que les canalisations élec­triques d'un groupe (19 à 22) sont électriquement connectées aux électrovalves (13 à 16) des éléments d'un équipement de travail (A) lorsque la partie pivotante du siège (1) est dans toute position comprise entre sa position extrême correspondant aux conditions normales de commande dudit équipement (A), et une position prédéterminée distincte de son autre position extrême.5. Control device according to any one of claims 2 to 4, characterized in that the electrical pipes of a group (19 to 22) are electrically connected to the solenoid valves (13 to 16) of the elements of a work equipment (A) when the pivoting part of the seat (1) is in any position between its extreme position corresponding to the normal conditions for controlling said equipment (A), and a predetermined position distinct from its other extreme position. 6. Dispositif de commande selon la revendication 5, caracté­risé en ce que les positions extrêmes du siège pivotant (1) sont angulairement distantes de 180° et en ce que la position dite "prédéterminée" est très voisine de l'une des positions extrêmes.6. Control device according to claim 5, characterized in that the extreme positions of the swivel seat (1) are angularly distant by 180 ° and in that the position called "predetermined" is very close to one of the extreme positions. 7. Dispositif de commande selon l'une quelconque des reven­dications précédentes, caractérisé en ce que, dans l'une au moins des positions du siège correspondant à la commande normale d'un équipement de travail (A), une commande auxiliaire (30) établit sélectivement la connexion entre les valves (17 - 18) des éléments de l'autre équipement (B) et l'un (6) au moins des manipulateurs de télécommande.7. Control device according to any one of the preceding claims, characterized in that, in at least one of the seat positions corresponding to the normal control of a work equipment (A), an auxiliary control (30) selectively establishes the connection between the valves (17 - 18) of the elements of the other equipment (B) and at least one (6) of the remote control manipulators.
EP89403201A 1988-11-21 1989-11-21 Control device for an earth-moving machine Expired - Lifetime EP0370892B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89403201T ATE77670T1 (en) 1988-11-21 1989-11-21 CONTROL DEVICE FOR AN EARTH-MOVING MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8815125 1988-11-21
FR8815125A FR2639384B1 (en) 1988-11-21 1988-11-21 CONTROL DEVICE FOR A PUBLIC WORKS MACHINE

Publications (2)

Publication Number Publication Date
EP0370892A1 true EP0370892A1 (en) 1990-05-30
EP0370892B1 EP0370892B1 (en) 1992-06-24

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EP89403201A Expired - Lifetime EP0370892B1 (en) 1988-11-21 1989-11-21 Control device for an earth-moving machine

Country Status (7)

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US (2) US4934462A (en)
EP (1) EP0370892B1 (en)
AT (1) ATE77670T1 (en)
DE (1) DE68901917T2 (en)
ES (1) ES2033543T3 (en)
FR (1) FR2639384B1 (en)
GR (1) GR3005412T3 (en)

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Also Published As

Publication number Publication date
FR2639384B1 (en) 1991-02-22
US4934462A (en) 1990-06-19
DE68901917T2 (en) 1993-01-07
ES2033543T3 (en) 1993-03-16
EP0370892B1 (en) 1992-06-24
GR3005412T3 (en) 1993-05-24
FR2639384A1 (en) 1990-05-25
US5092408A (en) 1992-03-03
ATE77670T1 (en) 1992-07-15
DE68901917D1 (en) 1992-07-30

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