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WO1998046932A1 - Device for emergency stopping of a tractor power take-off unit - Google Patents

Device for emergency stopping of a tractor power take-off unit Download PDF

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Publication number
WO1998046932A1
WO1998046932A1 PCT/FR1998/000717 FR9800717W WO9846932A1 WO 1998046932 A1 WO1998046932 A1 WO 1998046932A1 FR 9800717 W FR9800717 W FR 9800717W WO 9846932 A1 WO9846932 A1 WO 9846932A1
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WO
WIPO (PCT)
Prior art keywords
pto
gearbox
tractor
gear
micro
Prior art date
Application number
PCT/FR1998/000717
Other languages
French (fr)
Inventor
Jean-Michel Adiasse
Original Assignee
Adiasse Jean Michel
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Adiasse Jean Michel filed Critical Adiasse Jean Michel
Priority to AU73402/98A priority Critical patent/AU7340298A/en
Publication of WO1998046932A1 publication Critical patent/WO1998046932A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K28/00—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions
    • B60K28/02—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver
    • B60K28/04—Safety devices for propulsion-unit control, specially adapted for, or arranged in, vehicles, e.g. preventing fuel supply or ignition in the event of potentially dangerous conditions responsive to conditions relating to the driver responsive to presence or absence of the driver, e.g. to weight or lack thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body

Definitions

  • the invention relates to an emergency stop device for a tractor PTO
  • Agricultural tractors are currently designed to directly implement agricultural equipment, the most common of which are fixed to the rear of the tractor by means of a three-point hitch, allowing the height and tilt adjustment of the so-called equipment, and are driven by the tractor engine via a special transmission, known as "PTO" certain equipment, heavier and more cumbersome, is towed by the tractor, while still being connected to the PTO
  • the PTO must be able to be started and stopped at will during the operation of the main engine.
  • the PTO is generally equipped with a passive starting device, by switch with electro-hydraulic control. located in the driver's cabin
  • this device greatly facilitates interventions during work, it does not constitute a safety device for the operator working on equipment to adjust, clean or unclog it; also, drivers are often caught in such interventions not requiring that the PTO be stopped beforehand. Such accidents often have a fatal outcome, because, generally, no one is on the scene to stop the PTO and intervene to release the victim, who could not, given the suddenness of the snap, reach the PTO control unit located at the rear of the tractor, when the latter has one.
  • French patent application 2 233 200 describes a safety device for dynamic assemblies, controlled by a manual operating member, such as a steering wheel, which, in this case, comprises rings connected to a delay device, for the purpose to prevent the unwanted activation of a safety device, that is to say when the steering wheel plug is released momentarily. Beyond a certain time, if the steering wheel is released, a relay causes the engine to stop and, consequently, the vehicle to stop.
  • French patent 2,555,522 describes a safety device aimed both at permanently monitoring the physical state of the driver of a motorized vehicle and at causing the slowing down or stopping of said machine, or of equipment. moved by it, when certain pre-established conditions are no longer met.
  • This device consisting essentially of light transmitters and receivers, arranged on the crown of the steering wheel or on the hub cover of the latter, constitutes, in fact, an improved "dead man” system , which compels the driver, as in the previous case, to be careful to maintain a certain attitude in terms of driving the machine, which can be considered excessive when it is an agricultural tractor, making repetitive rectilinear journeys in fields, subject to work requiring some attention from the driver.
  • French patents 2,393,693 and 2,498,534 describe a device ensuring the automatic stopping of the motor of a tiller, when the driver releases both handles of the handlebars reverse gear, and only in this case. Given its design, such a device is not transferable to an agricultural tractor, for which, moreover, the same problem does not arise.
  • I t was also developed by an agricultural tractor manufacturer, an automatic PTO management system, which disconnects the PTO when the three-point hitch supporting a implement is raised.
  • this system still allows human intervention on the tool, while the PTO remained engaged.
  • the object of the present invention is to remedy the drawbacks presented by current safety devices, concerning the PTO of tractors.
  • This invention solves the problem of creating a safety device for a tractor PTO, with which, on the one hand, any exit of the driver from the tractor driving cab causes the PTO to stop, when it has remained in operation, and, on the other hand, does not impose any constraint or discomfort on the driver, when he is at his driving position
  • the device for emergency stop of the power take-off of a tractor when the driver leaves the driving position thereof consists of at least one electric micro-switch, combined with the gearbox control system, so that as soon as a gear is engaged, the PTO ceases to be driven or cannot be driven, without causing the engine of the tractor to stop
  • the device according to the invention consists of a micro-contactor, placed in the gearbox, on the path of the transmission neutral gear, so that the said micro -contactor is solicited only at the end of said fork so as to only obtain power off at this time of the electrical relay controlling the electro-hydraulic switch to activate the outlet force
  • a delay device can be connected in series between the stop device and the electrical relay
  • the device according to the invention comprises three micro-contactors mounted externally gearbox in the actuation angle gearbox of the control system of said gearbox respectively on the travel path, of the gear selection lever, of the game selection lever and of the hydraulic inverter control.
  • the device is managed electronically and is connected to the PTO start-up system so that when a gear is disengaged, the PTO ceases to be driven or cannot be driven.
  • FIG. 1 represents a top view, in partial section, of a gearbox equipped with an emergency stop device with a single micro-switch integrated in the box
  • - Figure 2 shows the diagram of the electrical connection of the emergency stop device according to Figure 1 with the power supply and control circuit of the electro-hydraulic switch to start the PTO
  • FIG. 3 shows a schematic top view of a tractor equipped with an emergency stop device with three micro-switches external to the gearbox
  • FIG. 1 represents a gearbox 40, provided with a micro-contactor 41 disposed on the trajectory of the fork 42 ensuring the neutral gearbox, so that the contact of the fork 42 with the microphone -contactor 41 is only ensured at the end of travel, which de-energizes the relay controlling the electro-hydraulic switch to activate the PTO
  • FIG. 2 represents the wiring diagram of the emergency stop device according to FIG. 1 connected to the relay 50 controlling the energization, by means of the battery 51, of the electro-hydraulic switch 52 PTO function
  • the contactor (not shown) of the device emergency stop is connected directly to one of the terminals (+) of the battery 51, on the one hand, and, on the other hand, to the other terminal (-) of the battery 51, by l intermediary of a relay 50 mounted in series with the emergency stop device, so that, when the energization of the relay 50 is interrupted by the contactor of the stop device, the said relay turns off the power electro-hydraulic switch 52.
  • a delay device 53 can be mounted in series between the stop device and the relay 50, in order to avoid any untimely stopping of the PTO due to a fleeting contact breakage resulting failure to pay attention to the tractor driver
  • the actuating angle gear 20 of the gearbox control system 40 is provided with three micro-contactors 24, 25, 26 respectively disposed on the lever operating path. 21 for gear selection, lever 22 for game selection and lever 23 for controlling the hydraulic shuttle
  • the safety system remains operational, taking into account its electronic management, since, when a speed is disengaged, the PTOs stop automatically, without having to press a button
  • the emergency stop device is intended, primarily, to equip agricultural tractors and other agricultural machines, such as combine harvesters, self-propelled beets and self-propelled but for example, but nothing would prevent its application to non-agricultural machinery, generating the same problems

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Agricultural Machines (AREA)

Abstract

The invention concerns a device comprising, according to one embodiment, three microswitches (24, 25, 26) mounted outside the gearbox (40) in the ring and pinion gearing (20) actuating the gearbox control system on the operating path of the gear lever (21), the range shift lever (22) and the hydraulic reversing gear control lever (23) respectively.

Description

DISPOSITI F D'ARRET D'URGENCE DE LA PRISE DE FORCE D'UN TRACTEUREMERGENCY STOP PROVISION OF THE PTO OF A TRACTOR
L'invention concerne un dispositif d'arrêt d'urgence de la prise de force d'un tracteurThe invention relates to an emergency stop device for a tractor PTO
Les tracteurs agricoles sont conçus, actuellement, pour mettre en oeuvre directement des équipements agricoles, dont les plus courants sont fixés à l'arrière du tracteur par l'intermédiaire d'un attelage à trois points, permettant le réglage en hauteur et en inclinaison des dits équipements, et sont mus par le moteur du tracteur par l'intermédiaire d'une transmission spé- ciale, dite "prise de force" certains équipements, plus lourds et plus encombrants, sont remorqués par le tracteur, tout en étant cependant raccordés à la prise de forceAgricultural tractors are currently designed to directly implement agricultural equipment, the most common of which are fixed to the rear of the tractor by means of a three-point hitch, allowing the height and tilt adjustment of the so-called equipment, and are driven by the tractor engine via a special transmission, known as "PTO" certain equipment, heavier and more cumbersome, is towed by the tractor, while still being connected to the PTO
On conçoit que la prise de force doit pouvoir être mise en route et arrêtée à volonté pendant le fonctionnement du moteur principal Pour cela, la prise de force est généralement dotée d'un dispositif passif de mise en route, par interrupteur à commande électro-hydraulique situé dans la cabine de conduiteIt is understood that the PTO must be able to be started and stopped at will during the operation of the main engine. For this, the PTO is generally equipped with a passive starting device, by switch with electro-hydraulic control. located in the driver's cabin
Toutefois, au cours des travaux agricoles, il arrive que le conducteur du tracteur soit amené à immobiliser celui-ci, après avoir mis le moteur au point mort et laissé celui-ci en marche, afin de pouvoir descendre et se rendre à l'arrière pour effectuer quelques vérifications ou interventions sur l'équipement agπ- cole en service, en maintenant celui-ci en fonction Au cours de ces interventions, il arrive que le conducteur soit amené à retourner plusieurs fois dans la cabine, pour stopper et remettre en route la prise de force ; aussi, certains constructeurs ont-ils récemment monté, à l'arrière du tracteur, sur l'une des ailes arrières de celui-ci, un boîtier de commande permettant d'agir directement sur la commande électro-hydraulique de la prise de force.However, during agricultural work, it sometimes happens that the driver of the tractor is brought to immobilize it, after having put the engine in neutral and leaving it running, in order to be able to descend and go to the rear to perform some checks or interventions on the agricultural equipment in service, keeping it in operation During these interventions, the driver may have to return to the cabin several times to stop and restart the PTO; Also, some manufacturers have recently mounted, at the rear of the tractor, on one of the rear wings of the latter, a control unit making it possible to act directly on the electro-hydraulic control of the PTO.
Bien que ce dispositif facilite beaucoup les interventions en cours de travail, il ne constitue cependant pas un dispositif de sécurité pour le conducteur intervenant sur un équipement pour le régler, le nettoyer ou le débourrer ; aussi, des conducteurs se font-ils fréquemment happer lors de telles interventions n'exigeant pas que la prise de force soit préalablement stoppée. De tels accidents ont souvent une issue mortelle, car, généralement, personne ne se trouve sur les lieux pour stopper la prise de force et intervenir pour dégager l'accidenté, qui n'a pu, compte-tenu de la soudaineté du happement, atteindre le boîtier de commande de prise de force situé à l'arrière du tracteur, lorsque celui-ci en comporte un.Although this device greatly facilitates interventions during work, it does not constitute a safety device for the operator working on equipment to adjust, clean or unclog it; also, drivers are often caught in such interventions not requiring that the PTO be stopped beforehand. Such accidents often have a fatal outcome, because, generally, no one is on the scene to stop the PTO and intervene to release the victim, who could not, given the suddenness of the snap, reach the PTO control unit located at the rear of the tractor, when the latter has one.
On connaît déjà divers dispositifs de sécurité, destinés à éviter des accidents pouvant résulter d'une perte de contrôle d'un engin motorisé, tel qu'un tracteur, lorsque le conducteur est pris de malaise : ce sont les dispositifs "d'homme mort", bien connus dans l'industrie et les travaux publics, destinés, soit à provoquer l'arrêt, soit à interdire la mise en service de certains organes dans des circonstances particulières. La demande de brevet français 2 233 200 décrit un dispositif de sécurité pour ensembles dynamiques, à commande par organe de manoeuvre manuel, tel qu'un volant, qui, dans ce cas, comporte des anneaux reliés à un dispositif à retard, dans le but d'empêcher le déclenchement non demandé d'un dispositif de sécurité, c'est-à-dire lorsque la prise du volant est relâchée momentanément. Au-delà d'un certain temps, si le relâchement du volant se poursuit, un relais provoque l'arrêt du moteur et, par suite, l'arrêt du véhicule. Toutefois, un tel dispositif exige le contact quasi-permanent des doigts sur les deux anneaux conducteurs ; ce qui exclut le port de gants et un relâchement du volant même lors de trajectoires droites stabilisées. L'utilisation de ce dispositif exige un minimum de concentration de la part du conducteur, qui le distrait de la surveillance des travaux en cours, car tout fonctionnement intempestif du dispositif provoque un arrêt du moteur et, par conséquent, de la prise de force, avec les répercussions que l'on imagine sur le travail en cours.Various safety devices are already known, intended to avoid accidents which may result from a loss of control of a motorized vehicle, such as a tractor, when the driver becomes unwell: these are the "dead man's devices"", well known in industry and public works, intended either to cause the shutdown, or to prohibit the entry into service of certain organs in particular circumstances. French patent application 2 233 200 describes a safety device for dynamic assemblies, controlled by a manual operating member, such as a steering wheel, which, in this case, comprises rings connected to a delay device, for the purpose to prevent the unwanted activation of a safety device, that is to say when the steering wheel plug is released momentarily. Beyond a certain time, if the steering wheel is released, a relay causes the engine to stop and, consequently, the vehicle to stop. However, such a device requires almost permanent contact of the fingers on the two conductive rings; which excludes the wearing of gloves and slackening of the steering wheel even during stabilized straight paths. The use of this device requires a minimum of concentration on the part of the driver, who distracts him from monitoring work in progress, because any untimely operation of the device causes the engine to stop and, consequently, the PTO, with the repercussions that we imagine on the work in progress.
Le brevet français 2 555 522 décrit un dispositif de sécurité visant, à la fois, à contrôler en permanence l'état physique du conducteur d'un engin motorisé et à provoquer le ralentissement ou l'arrêt du dit engin, ou d'un équipement mû par celui-ci, lorsque certaines conditions pré-établies ne sont plus réunies. Ce dispositif, constitué, pour l'essentiel, d'émetteurs et de récepteurs de lumière, disposés sur la couronne du volant ou sur le cache-moyeu de celui-ci , constitue, en fait, un système "d'homme mort" perfectionné, qui contraint le conducteur, comme dans le cas précédent, à se soucier de conserver une certaine attitude au niveau de la conduite de l'engin, qui peut être jugée excessive lorsqu'il s'agit d'un tracteur agricole, effectuant des trajets rectilignes répétitifs dans des champs, sou- mis à des travaux nécessitant une certaine attention de la part du conducteur.French patent 2,555,522 describes a safety device aimed both at permanently monitoring the physical state of the driver of a motorized vehicle and at causing the slowing down or stopping of said machine, or of equipment. moved by it, when certain pre-established conditions are no longer met. This device, consisting essentially of light transmitters and receivers, arranged on the crown of the steering wheel or on the hub cover of the latter, constitutes, in fact, an improved "dead man" system , which compels the driver, as in the previous case, to be careful to maintain a certain attitude in terms of driving the machine, which can be considered excessive when it is an agricultural tractor, making repetitive rectilinear journeys in fields, subject to work requiring some attention from the driver.
Dans le domaine de la sécurité sur la prise de force, les brevets français 2 393 693 et 2 498 534 décrivent un dispositif assurant l'arrêt automatique du moteur d'un motoculteur, lorsque le conducteur lâche les deux poignées du guidon, lors d'une marche arrière de l'engin, et uniquement dans ce cas. Un tel dispositif n'est pas, compte-tenu de sa conception, transpo- sable à un tracteur agricole, pour lequel , d'ailleurs, le même problème ne se pose pas.In the field of PTO safety, French patents 2,393,693 and 2,498,534 describe a device ensuring the automatic stopping of the motor of a tiller, when the driver releases both handles of the handlebars reverse gear, and only in this case. Given its design, such a device is not transferable to an agricultural tractor, for which, moreover, the same problem does not arise.
I l a été aussi développé, par un fabricant de tracteur agricole, un système de gestion automatique de la prise de force, qui déconnecte celle-ci lorsque l'on relève l'attelage trois points sup- portant un outil. Toutefois, ce système autorise toujours une intervention humaine sur l'outil, alors que la prise de force est restée enclenchée.I t was also developed by an agricultural tractor manufacturer, an automatic PTO management system, which disconnects the PTO when the three-point hitch supporting a implement is raised. However, this system still allows human intervention on the tool, while the PTO remained engaged.
La présente invention a pour but de remédier aux inconvénients présentés par les actuels dispositifs de sécurité, concernant la prise de force des tracteurs. Cette invention, telle qu'elle se caractérise, résout le problème consistant à créer un dispositif de sécurité pour prise de force de tracteur, avec lequel, d'une part, toute sortie du conducteur de la cabine de conduite du tracteur provoque l'arrêt de la prise de force, lorsque celle-ci est restée en fonction, et, d'autre part, n'imposent aucune contrainte, ni aucune gêne, au conducteur, lorsque celui-ci est à son poste de conduiteThe object of the present invention is to remedy the drawbacks presented by current safety devices, concerning the PTO of tractors. This invention, as it stands, solves the problem of creating a safety device for a tractor PTO, with which, on the one hand, any exit of the driver from the tractor driving cab causes the PTO to stop, when it has remained in operation, and, on the other hand, does not impose any constraint or discomfort on the driver, when he is at his driving position
Selon l'invention, le dispositif d'arrêt d'urgence de la prise de force d'un tracteur lorsque le conducteur quitte le poste de conduite de celui-ci est constitué d'au moins un micro-contac- teur électrique, combiné au système de commande de la boîte de vitesses, de façon que dès que l'on désenclenche une vitesse, la prise de force cesse d'être entraînée ou ne puisse être entraînée, sans que cela provoque l'arrêt du moteur du tracteurAccording to the invention, the device for emergency stop of the power take-off of a tractor when the driver leaves the driving position thereof consists of at least one electric micro-switch, combined with the gearbox control system, so that as soon as a gear is engaged, the PTO ceases to be driven or cannot be driven, without causing the engine of the tractor to stop
Selon un mode de réalisation simplifié le dispositif selon l'invention, est constitué d'un micro-contacteur, disposé dans la boîte de vitesses, sur le parcours de la fourchette de mise au point mort de la transmission, de façon que le dit micro-contac- teur soit sollicité qu' en fin de course de la dite fourchette afin de n'obtenir qu'à ce moment la mise hors-tension du relais électrique contrôlant l'interrupteu r électro-hydraulique de mise en fonction de la prise de force Un dispositif à retard peut être monté en série entre le dispositif d'arrêt et le relais électriqueAccording to a simplified embodiment, the device according to the invention consists of a micro-contactor, placed in the gearbox, on the path of the transmission neutral gear, so that the said micro -contactor is solicited only at the end of said fork so as to only obtain power off at this time of the electrical relay controlling the electro-hydraulic switch to activate the outlet force A delay device can be connected in series between the stop device and the electrical relay
Selon un mode de réalisation préférentiel, le dispositif selon l'invention comporte trois micro-contacteu rs montés à l'exté- rieur de la boîte de vitesses dans le renvoi d'angle d'actionne- ment du système de commande de ladite boîte de vitesses respectivement sur la trajectoire de déplacement, du levier de sélection de vitesse, du levier de sélection de game et du levier de commande de l'inverseur hydraulique.According to a preferred embodiment, the device according to the invention comprises three micro-contactors mounted externally gearbox in the actuation angle gearbox of the control system of said gearbox respectively on the travel path, of the gear selection lever, of the game selection lever and of the hydraulic inverter control.
Le dispositif est géré électroniquement et est relié au système de mise en fonction de la prise de force de façon que lorsque l'on désenclenche une vitesse, la prise de force cesse d'être entraînée ou ne puisse être entraînée.The device is managed electronically and is connected to the PTO start-up system so that when a gear is disengaged, the PTO ceases to be driven or cannot be driven.
Les avantages obtenus, grâce à cette invention consistent, essentiellement en ceci , que toute i nterventio n directe du conducteur sur une machine ou un équipement mû par la prise de force, alors que celle-ci est restée en fonction, est impos- sible, ainsi que toute remise en fonction à partir d'un boîtier oe commande à distance, situé sur l'une des ailes arrières du tracteu r, ou sur le boîtier de commande principal situé près du poste de conduite, lorsque celui-ci n'est pas occupé.The advantages obtained, thanks to this invention consist, essentially in this, that any direct intervention of the driver on a machine or equipment driven by the power take-off, while the latter has remained in operation, is impossible, as well as any resetting from a remote control unit, located on one of the rear fenders of the tractor, or on the main control unit located near the driver's position, when this is not not occupied.
D'autres caractéristiques et avantages apparaîtront dans la description qui va suivre de chacun des deux modes de réalisation du dispositif d'arrêt d'urgence selon l'invention, donnés à titre d'exemple non limitatif, au regard des dessins annexés sur lesquels .Other characteristics and advantages will appear in the following description of each of the two embodiments of the emergency stop device according to the invention, given by way of nonlimiting example, with regard to the appended drawings in which.
- la figure 1 représente une vue de dessus, en coupe partielle, d'une boîte de vitesses équipée d'un dispositif d'arrêt d'urgence à un seul micro-contacteur intégré à la boîte, - la figure 2 représente le schéma de la liaison électrique du dispositif d'arrêt d'urgence selon la figure 1 avec le circuit d'alimentation et de commande de l'interrupteur électro-hydrauli- que de mise en fonction de la prise de force,FIG. 1 represents a top view, in partial section, of a gearbox equipped with an emergency stop device with a single micro-switch integrated in the box, - Figure 2 shows the diagram of the electrical connection of the emergency stop device according to Figure 1 with the power supply and control circuit of the electro-hydraulic switch to start the PTO ,
- la figure 3 représente une vue de dessus schématique d'un tracteur équipé d'un dispositif d'arrêt d'urgence à trois micro- contacteurs extérieurs à la boîte de vitesses- Figure 3 shows a schematic top view of a tractor equipped with an emergency stop device with three micro-switches external to the gearbox
En examinant, maintenant, successivement, chacune des figures, on remarque queBy examining, now, successively, each of the figures, we notice that
La figure 1 représente une boîte de vitesses 40, munie d'un mi- cro-contacteur 41 disposé sur la trajectoire de la fourchette 42 assurant la mise au point mort de la boîte, de façon que le contact de la fourchette 42 avec le micro-contacteur 41 ne soit assuré qu'en fin de course, ce qui met hors tension le relais contrôlant l'interrupteur électro-hydraulique de mise en fonc- tion de la prise de forceFIG. 1 represents a gearbox 40, provided with a micro-contactor 41 disposed on the trajectory of the fork 42 ensuring the neutral gearbox, so that the contact of the fork 42 with the microphone -contactor 41 is only ensured at the end of travel, which de-energizes the relay controlling the electro-hydraulic switch to activate the PTO
La figure 2 représente le schéma du câblage du dispositif d'arrêt d'urgence selon la figure 1 raccordé au relais 50 contrôlant la mise sous tension, par l'intermédiaire de la batterie 51 , de l'interrupteur électro- hydraulique 52 de mise en fonction de la prise de forceFIG. 2 represents the wiring diagram of the emergency stop device according to FIG. 1 connected to the relay 50 controlling the energization, by means of the battery 51, of the electro-hydraulic switch 52 PTO function
Comme on le voit, le contacteur (non représenté) du dispositif d'arrêt d'urgence est relié directement à l'une des bornes (+) de la batterie 51 , d'une part, et, d'autre part, à l'autre borne (-) de la batterie 51 , par l'intermédiaire d'un relais 50 monté en série avec le dispositif d'arrêt d'urgence, de façon que, lorsque la mise sous tension du relais 50 est interrompue par le contacteur du dispositif d'arrêt, le dit relais mette hors tension l'interrupteur électro-hydraulique 52. Un dispositif à retard 53 peut être monté en série entre le dispositif d'arrêt et le relais 50 , afin d'éviter tout arrêt intempestif de la prise de force dû à une rup- ture de contact fugitive résultant d'un défaut d'attention du conducteur du tracteurAs can be seen, the contactor (not shown) of the device emergency stop is connected directly to one of the terminals (+) of the battery 51, on the one hand, and, on the other hand, to the other terminal (-) of the battery 51, by l intermediary of a relay 50 mounted in series with the emergency stop device, so that, when the energization of the relay 50 is interrupted by the contactor of the stop device, the said relay turns off the power electro-hydraulic switch 52. A delay device 53 can be mounted in series between the stop device and the relay 50, in order to avoid any untimely stopping of the PTO due to a fleeting contact breakage resulting failure to pay attention to the tractor driver
En examinant maintenant la figure 3, on remarque que le renvoi d'angle 20 d'actionnement du système de commande de la boîte de vitesses 40 est muni de trois micro-contacteurs 24 , 25,26 disposés respectivement sur la trajectoire de manoeuvre du levier 21 de sélection de vitesse, du levier 22 de sélection de game et du levier 23 de commande de l'inverseur hydrauliqueNow examining FIG. 3, it can be seen that the actuating angle gear 20 of the gearbox control system 40 is provided with three micro-contactors 24, 25, 26 respectively disposed on the lever operating path. 21 for gear selection, lever 22 for game selection and lever 23 for controlling the hydraulic shuttle
Ainsi, que la ou les prises de force soient commandées depuis la cabine ou depuis l'arrière du tracteur 10 , le système de sécurité reste opérationnel, compte-tenu de sa gestion électronique, puisque, lorsqu'une vitesse est désenclenchée, la ou les prises de force s'arrêtent automatiquement, sans qu'il soit né- cessaire d'appuyer sur un boutonThus, whether the PTO (s) are controlled from the cab or from the rear of the tractor 10, the safety system remains operational, taking into account its electronic management, since, when a speed is disengaged, the PTOs stop automatically, without having to press a button
En effet, pour l'exécution de certains travaux à poste fixe, il est nécessaire de disposer du moteur pour obtenir de l'énergie hy- draulique, sans que la prise de force soit ou puisse être entraînéeIndeed, for the execution of certain work at a fixed station, it is necessary to have the motor to obtain hy- hydraulic, without the PTO being or can be driven
Le dispositif d'arrêt d'urgence selon l'invention est destiné, principalement, à équiper les tracteurs agricoles et autres engins agricoles, tels que moissonneuses-batteuses, automotrices à betteraves et automotrices à mais par exemple, mais rien ne s'opposerait à son application à des engins non agricoles, générant les mêmes problèmes The emergency stop device according to the invention is intended, primarily, to equip agricultural tractors and other agricultural machines, such as combine harvesters, self-propelled beets and self-propelled but for example, but nothing would prevent its application to non-agricultural machinery, generating the same problems

Claims

R EVEN DI CATIONSR EVEN DI CATIONS
1 Dispositif d'arrêt d'urgence de la prise de force d'un tracteur lorsque le conducteur quitte le poste de conduite de celui-ci, caractérisé en ce qu'il est constitué d'au moins un micro- contacteur électrique combiné au système de commande de la boîte de vitesses de façon que dès que l'on désenclenche une vitesse, la prise de force cesse d'être entraînée ou ne puisse être entraînée, sans que cela provoque l'arrêt du moteur (30) du tracteur (10)1 Emergency stop device for a tractor PTO when the driver leaves his driving position, characterized in that it consists of at least one electric micro-switch combined with the system gearbox control so that as soon as a gear is disengaged, the PTO ceases to be driven or cannot be driven, without this stopping the engine (30) of the tractor (10 )
2 Dispositif selon la revendication 1 , caractérisé en ce qu'il comporte un unique micro-contacteur (41 ) monté à l'intérieur de la boîte de vitesses (40) sur le parcours de la fourchette (42) de mise au point mort de la transmission2 Device according to claim 1, characterized in that it comprises a single micro-switch (41) mounted inside the gearbox (40) on the path of the fork (42) of neutral focus the transmission
3 Dispositif selon la revendication 2, caractérisé en ce que le micro-contacteur (41 ) est disposé de façon à n'être sollicité qu'en fin de course par la fourchette (42) afin de n'obtenir qu'à ce moment la mise hors-tension du relais électrique (50) contrôlant l'interrupteur électro-hydraulique (52) de mise en fonction de la prise de force3 Device according to claim 2, characterized in that the microswitch (41) is arranged so as to be biased only at the end of travel by the fork (42) so as to obtain only at this time the de-energizing of the electrical relay (50) controlling the electro-hydraulic switch (52) to activate the PTO
4 Dispositif selon la revendication 3, caractérisé en ce qu'un dispositif à retard (53) est monté en série entre le dispositif d'arrêt et le relais électrique (50) 4 Device according to claim 3, characterized in that a delay device (53) is mounted in series between the stop device and the electrical relay (50)
5. Dispositif selon la revendication 1 , caractérisé en ce qu'il comporte trois micro-contacteurs (24,25,26) montés à l'extérieur de la boîte de vitesses (40) dans le renvoi d'angle (20) d'actionnement du système de commande de ladite boîte de vitesses respectivement sur la trajectoire de déplacement, du le- vier (21 ) de sélection de vitesse, du levier (22) de sélection de game et du levier (23) de commande de l'inverseur hydraulique.5. Device according to claim 1, characterized in that it comprises three micro-contactors (24,25,26) mounted outside the gearbox (40) in the bevel gear (20) of actuation of the control system of said gearbox respectively on the displacement path, of the gear selection lever (21), of the game selection lever (22) and of the lever of the reverse gear control hydraulic.
6. Dispositif selon la revendication 5, caractérisé en ce que celui-ci est géré électroniquement et est relié au système de mise en fonction de la prise de force de façon que, lorsque l'on dés- enclenche une vitesse, la prise de force cesse d'être entraînée ou ne puisse être entraînée. 6. Device according to claim 5, characterized in that it is managed electronically and is connected to the PTO start-up system so that, when a gear is disengaged, the PTO ceases to be trained or cannot be trained.
PCT/FR1998/000717 1997-04-11 1998-04-08 Device for emergency stopping of a tractor power take-off unit WO1998046932A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU73402/98A AU7340298A (en) 1997-04-11 1998-04-08 Device for emergency stopping of a tractor power take-off unit

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR97/04490 1997-04-11
FR9704490A FR2762069A1 (en) 1997-04-11 1997-04-11 TRACTOR POWER TAKE-OFF EMERGENCY STOP PROCEDURE AND DEVICE

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WO1998046932A1 true WO1998046932A1 (en) 1998-10-22

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Application Number Title Priority Date Filing Date
PCT/FR1998/000717 WO1998046932A1 (en) 1997-04-11 1998-04-08 Device for emergency stopping of a tractor power take-off unit

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FR (1) FR2762069A1 (en)
WO (1) WO1998046932A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPD20100307A1 (en) * 2010-10-15 2012-04-16 Carraro Spa SECURITY SYSTEM FOR AN AGRICULTURAL VEHICLE OPERATOR

Citations (6)

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Publication number Priority date Publication date Assignee Title
US4267804A (en) * 1978-01-31 1981-05-19 Owatonna Manufacturing Company, Inc. Neutral start and centering device for power transmission mechanism
US4317500A (en) * 1980-02-22 1982-03-02 Deere & Company Safety start and shutdown system for vehicles having electrically activated power take-off
FR2498534A1 (en) * 1981-01-27 1982-07-30 Staub Tracteurs Motocult Safety arrangement hand guided motor cultivator - uses main contactor in series with normally open push button fitted on handgrips of both handles of cultivator
FR2555522A1 (en) * 1983-11-30 1985-05-31 Aisin Seiki APPARATUS FOR MONITORING THE STATUS OF A PERSON AND CONTROLLING THE SAFETY OF A MOTOR VEHICLE
US4651018A (en) * 1985-08-12 1987-03-17 Deere & Company Neutral start circuit for a vehicle including a power take-off assembly
US5522778A (en) * 1994-03-18 1996-06-04 Aisin Seiki Kabushiki Kaisha Automatic transmission with power take-off unit

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Publication number Priority date Publication date Assignee Title
SE7308217L (en) * 1973-06-12 1974-12-13 Isaksson Ove Gustav
NL175579B (en) * 1978-12-08 1984-07-02 Lely Nv C Van Der AGRICULTURAL EQUIPMENT WITH PROTECTIVE DEVICE FOR INTERRUPTING THE ACTIVATING DEVICE.
DE4400664C2 (en) * 1994-01-12 1995-11-16 Spies Martin Dipl Ing Fh Device for detecting seat occupancy in vehicles etc.
US5616964A (en) * 1995-09-19 1997-04-01 Deere & Company Lawn and garden tractor interlock circuit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4267804A (en) * 1978-01-31 1981-05-19 Owatonna Manufacturing Company, Inc. Neutral start and centering device for power transmission mechanism
US4317500A (en) * 1980-02-22 1982-03-02 Deere & Company Safety start and shutdown system for vehicles having electrically activated power take-off
FR2498534A1 (en) * 1981-01-27 1982-07-30 Staub Tracteurs Motocult Safety arrangement hand guided motor cultivator - uses main contactor in series with normally open push button fitted on handgrips of both handles of cultivator
FR2555522A1 (en) * 1983-11-30 1985-05-31 Aisin Seiki APPARATUS FOR MONITORING THE STATUS OF A PERSON AND CONTROLLING THE SAFETY OF A MOTOR VEHICLE
US4651018A (en) * 1985-08-12 1987-03-17 Deere & Company Neutral start circuit for a vehicle including a power take-off assembly
US5522778A (en) * 1994-03-18 1996-06-04 Aisin Seiki Kabushiki Kaisha Automatic transmission with power take-off unit

Also Published As

Publication number Publication date
AU7340298A (en) 1998-11-11
FR2762069A1 (en) 1998-10-16

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