WO2001014167A1 - Improvement to vehicle lifting tail gate - Google Patents

Improvement to vehicle lifting tail gate Download PDF

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Publication number
WO2001014167A1
WO2001014167A1 PCT/FR2000/002345 FR0002345W WO0114167A1 WO 2001014167 A1 WO2001014167 A1 WO 2001014167A1 FR 0002345 W FR0002345 W FR 0002345W WO 0114167 A1 WO0114167 A1 WO 0114167A1
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WO
WIPO (PCT)
Prior art keywords
sensor
tailgate
vehicle
lifting
platform
Prior art date
Application number
PCT/FR2000/002345
Other languages
French (fr)
Inventor
Marc Lamort De Gail
Original Assignee
Compagnie Erhel Hydris
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 Compagnie Erhel Hydris filed Critical Compagnie Erhel Hydris
Priority to EP00958710A priority Critical patent/EP1121271A1/en
Priority to AU70147/00A priority patent/AU7014700A/en
Publication of WO2001014167A1 publication Critical patent/WO2001014167A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
    • B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
    • B60P1/44—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading having a loading platform thereon raising the load to the level of the load-transporting element
    • B60P1/4471—General means for controlling movements of the loading platform, e.g. hydraulic systems

Definitions

  • the present invention relates to an improvement for a retractable tail lift for a vehicle and more particularly to its management and control system.
  • tailgates consist of a lifting platform, connected to the rear of the truck chassis by a set of delivery arms, constituting connection and lifting means, said set of arms being pivotally movable to allow the ascent and descent from the platform.
  • the platform must be retracted to be stored, for example under the vehicle, while a set of actuators actuates the various movements of the elements of the tailgate to allow on the one hand the lifting and lowering of the platform but also the maintenance of the latter in a substantially horizontal position, during the ascent and descent of the platform.
  • the tailgates comprise one or more jacks called lifting jacks controlling the lifting and lowering of the platform and one or more jacks called tilt jacks positioning the platform relative to the lifting arms.
  • This type of tailgate is for example described by the French patent published under the number FR 2786455.
  • the present invention intends to innovate in the field of tail lifts by proposing a management and control system, particularly simple, reliable and economical.
  • the tail lift comprises management and control means, making it possible in particular to prevent lifting any mass greater than the nominal capacity of the tailgate, which is particularly advantageous when it is known that the European directives on lifting gear require manufacturer to be able to prohibit any dangerous movement.
  • the said means of management and control also make it possible to weigh the on-board load, so as to verify that its weight corresponds well to the declarations made, which is of great interest insofar as the carriers invoice their services on the basis of the weight.
  • the means of the invention it also becomes possible, during a delivery tour, to check whether the total permissible laden weight of the vehicle remains respected (loading / unloading with only the tailgate), the processor subtracting and adding both to determine the total load present in the truck, and therefore makes it possible to keep track of any overloads, with a history.
  • the vehicle tailgate is of the type consisting of an elevating platform connected to the chassis of the vehicle by a set of linkage and lifting arms, while jacks are provided on the one hand move said link arms and on the other hand hold the horizontal platform, during its rise and fall, namely, at least one lifting cylinder ensuring the pivoting of the link and lifting arms and at least one cylinder inclination ensuring the correct position of the platform relative to the arms, and is characterized in that management and control means are provided.
  • the management and control means comprise at least sensors and a computerized control module or unit.
  • At least one of the lifting cylinders, and at least one of the tilting cylinders comprise a sensor, such as for example an oil pressure sensor which is connected to a computerized control module or unit , while the latter comprises a microprocessor interpreting the signals received from the sensors and calculating the moment of the torque resulting from the effect of the load on the platform, by combination of the two pressure measurements.
  • a sensor such as for example an oil pressure sensor which is connected to a computerized control module or unit
  • the latter comprises a microprocessor interpreting the signals received from the sensors and calculating the moment of the torque resulting from the effect of the load on the platform, by combination of the two pressure measurements.
  • Figure 1 is a side view of the rear of the truck with its tail lift in its folded storage position, the lifting and tilt cylinders known per se not being shown
  • Figure 2 is a rear view of the truck.
  • FIGS 3, 4 and 5 are the three diagrams of hydraulic circuits given as an example of execution.
  • the tailgate according to the invention bearing the general reference (1) is fixed to the rear part of a vehicle, such as a truck or a trailer (3).
  • Said tailgate (1) consists of an elevating platform (5) connected to the chassis (4) of the truck by connection and lifting means known per se and consisting of a set of link and lifting arms ( 7) while jacks (8a, 8b- 9a, 9b) are provided to move said link arms and hold the platform horizontal, during its ascent and descent
  • lifting cylinders (8a, 8b) ensuring the pivoting of the linkage and lifting arms (7) and tilting cylinders (9a, 9b) ensuring the correct position of the platform (5) by relative to the arms (7).
  • At least one of the lifting cylinders (8a, 8b), and at least one of the tilting cylinders (9a, 9b) comprise a sensor, such as for example an oil pressure sensor which is connected to a computerized control module or unit.
  • the oil pressure sensors are for example arranged in direct or indirect contact with the oil of each of the corresponding cylinders.
  • Each of the sensors therefore sends information to the control module which includes a microprocessor interpreting the signals and calculating the moment of the torque resulting from the effect of the load on the platform, by combining the two pressure measurements. So that, whatever the position of the load on the platform of the tail lift, and taking into account the leverage, the weight of this load is determined.
  • the accuracy of the measurement depends of course on the accuracy of the sensors (+/- 5%) and the hysteresis of the cylinders. Accuracy of the “weight and measurement” type can be obtained with more sensitive sensors than those supplied as standard.
  • the movements of the tail lift are controlled by an electronic card comprising a microprocessor to which memory has been added (programmable EPROM).
  • the memory software controls the opening and closing of the solenoid valves, and therefore the opening and closing of the tilt and lift cylinders, as well as of the retraction or retraction mechanisms of the mechanism.
  • control module thanks to its processor and its programming allows:
  • the sensors could be of another type than that described above, such as for example a strain gauge or other and / or placed in other places so as to be able to cross the data and thus calculate the moment of the charge.
  • FIG 3 is a hydraulic diagram given as a first example of embodiment, according to which one of the lifting cylinders (8) comprises an oil pressure sensor (10).
  • Said sensor (10) is for example an all or nothing type sensor, which can have two types of operation. One of the operations being such that it is preset at closing at a pressure of zero bar, and the other operating as it is preset at opening at a determined threshold value corresponding to the maximum authorized pressure.
  • two sensors can be used to obtain the two functions mentioned above.
  • One of the sensors is for example preset to close at zero bar allowing the detection of the arrival and / or takeoff of the platform relative to the ground and thanks to the module or control unit, controls a relay which switches in operation the action of the tilt cylinders (9) thus ensuring a perfect tilt relative to the ground.
  • the other of the sensors is for example preset at the opening to a threshold value or maximum pressure corresponding to the maximum value of the admissible load. As soon as this threshold is reached, the control unit then detects an overload and either triggers an alarm warning the user, or prohibits any movement of the tailgate and for example the raising and / or lowering of the platform.
  • FIG. 4 is an illustration of another hydraulic diagram of a second embodiment according to which the sensor (11) disposed on one of the lifting cylinders (8) is a pressure sensor whose electrical signal is proportional with pressure. Said sensor (11) making it possible to obtain the following three functions:
  • - weighing that is to say the evaluation and determination of the mass of the load by integrating the value of the pressure measured in a formula taking account of the lever arm, the surfaces of the sections of the jacks and phenomena hysteresis.
  • Figure 5 is another embodiment of the hydraulic circuit according to which two sensors are provided, a first pressure sensor (11) on the lifting cylinder (8a) and a second pressure sensor (12) on the cylinder d 'tilt (9a).
  • the jacks 21a and 21b are jacks used for the retraction of the entire tailgate on the chassis of the corresponding truck.

Abstract

The invention concerns a vehicle lifting tail gate (1) consisting of an elevator platform (5) connected to the vehicle body (4) by a link-and-lift arm assembly (7) while cylinders (8a, 8b, 9a, 9b) are provided for moving said link arms and maintaining the platform in a horizontal position, when it is being raised and lowered, namely at least a lift cylinder (8a, 8b) for pivoting the link-and-lift arms (7) and at least a tip cylinder (9a, 9b) ensuring the proper positioning of the platform (5) relative to the arms (7). The invention is characterised in that managing and controlling means are provided.

Description

PERFECTIONNEMENT POUR HAYON ELEVATEUR DE VEHICULEIMPROVEMENT FOR A VEHICLE LIFT
La présente invention concerne un perfectionnement pour hayon élévateur rétractable pour véhicule et plus particulièrement son système de gestion, et de contrôle.The present invention relates to an improvement for a retractable tail lift for a vehicle and more particularly to its management and control system.
On connaît déjà de nombreux hayons élévateurs destinés au déplacement de charges, équipant généralement l'arrière des camions permettent le chargement et le déchargement de produits destinés à être livrés. Ces hayons sont constitués d'une plate-forme élevatrice, reliée à l'arrière du châssis du camion par un ensemble de bras de livraison, constituant des moyens de liaison et de levage, ledit ensemble de bras étant mobile en pivotement afin de permettre la montée et la descente de la plate-forme.We already know many tail lifts intended for the displacement of loads, generally equipping the rear of trucks allow the loading and unloading of products intended to be delivered. These tailgates consist of a lifting platform, connected to the rear of the truck chassis by a set of delivery arms, constituting connection and lifting means, said set of arms being pivotally movable to allow the ascent and descent from the platform.
Par ailleurs la plate-forme doit être escamotée pour être rangée, par exemple sous le véhicule, tandis qu'un ensemble de vérin actionne les différents mouvements des éléments du hayon pour permettre d'une part le levage et la descente de la plate-forme mais aussi le maintien de cette dernière en position sensiblement horizontal, lors de la montée et la descente de la plate- forme. Ainsi, les hayons comprennent un ou plusieurs vérins dits vérins de levage commandant la levée et la descente de la plate-forme et un ou plusieurs vérins dits vérins d'inclinaison positionnant la plate-forme par rapport aux bras de levage. Ce type de hayon est par exemple décrit par le brevet français publié sous le numéro FR 2786455.Furthermore, the platform must be retracted to be stored, for example under the vehicle, while a set of actuators actuates the various movements of the elements of the tailgate to allow on the one hand the lifting and lowering of the platform but also the maintenance of the latter in a substantially horizontal position, during the ascent and descent of the platform. Thus, the tailgates comprise one or more jacks called lifting jacks controlling the lifting and lowering of the platform and one or more jacks called tilt jacks positioning the platform relative to the lifting arms. This type of tailgate is for example described by the French patent published under the number FR 2786455.
La présente invention entend innover dans le domaine des hayons élévateurs en proposant un système de gestion et de contrôle, particulièrement simple fiable et économique.The present invention intends to innovate in the field of tail lifts by proposing a management and control system, particularly simple, reliable and economical.
Selon l'invention le hayon élévateur comprend des moyens de gestion et de contrôle, permettant notamment d'empêcher de lever toute masse supérieure à la capacité nominale du hayon ce qui est particulièrement intéressant quand on sait que les directives européennes sur les engins de levage requièrent du fabricant qu'il soit en mesure d'interdire tout mouvement dangereux. Par ailleurs, les dits moyens de gestion et de contrôle permettent aussi de peser la charge embarquée, de façon à vérifier que son poids correspond bien aux déclarations faites, ce qui est d'un grand intérêt dans la mesure où les transporteurs facturent leurs prestations sur la base du poids.According to the invention, the tail lift comprises management and control means, making it possible in particular to prevent lifting any mass greater than the nominal capacity of the tailgate, which is particularly advantageous when it is known that the European directives on lifting gear require manufacturer to be able to prohibit any dangerous movement. In addition, the said means of management and control also make it possible to weigh the on-board load, so as to verify that its weight corresponds well to the declarations made, which is of great interest insofar as the carriers invoice their services on the basis of the weight.
Grâce aux moyens de l'invention, il devient aussi possible, au cours d'une tournée de livraison, de vérifier si le poids total admissible en charge du véhicule reste respecté (chargements/ déchargements avec seulement le hayon), le processeur soustrayant et additionnant l'un et l'autre pour déterminer la charge totale présente dans le camion, et permet donc de conserver la trace des surcharges éventuelles, avec un historique.Thanks to the means of the invention, it also becomes possible, during a delivery tour, to check whether the total permissible laden weight of the vehicle remains respected (loading / unloading with only the tailgate), the processor subtracting and adding both to determine the total load present in the truck, and therefore makes it possible to keep track of any overloads, with a history.
Ainsi, selon l'invention, le hayon élévateur de véhicule est du type constitué d'une plate-forme élevatrice reliée au châssis du véhicule par un ensemble de bras de liaison et de levage, tandis que des vérins sont prévus pour d'une part mouvoir lesdits bras de liaison et d'autre part tenir la plateforme horizontale, lors de sa montée et de sa descente, à savoir, au moins un vérin de levage assurant le pivotement des bras de liaison et de levage et au moins un vérin d'inclinaison assurant la bonne position de la plate-forme par rapport aux bras, et est caractérisé en ce qu'il est prévu des moyens de gestion et de contrôle.Thus, according to the invention, the vehicle tailgate is of the type consisting of an elevating platform connected to the chassis of the vehicle by a set of linkage and lifting arms, while jacks are provided on the one hand move said link arms and on the other hand hold the horizontal platform, during its rise and fall, namely, at least one lifting cylinder ensuring the pivoting of the link and lifting arms and at least one cylinder inclination ensuring the correct position of the platform relative to the arms, and is characterized in that management and control means are provided.
Selon une caractéristique complémentaire, les moyens de gestion et de contrôle comprennent au moins des capteurs et un module ou unité de commande informatisée.According to an additional characteristic, the management and control means comprise at least sensors and a computerized control module or unit.
Selon une autre caractéristique l'un au moins des vérins de levage, et l'un au moins des vérins d'inclinaison comprennent un capteur, comme par exemple un capteur de pression d'huile qui est relié à un module ou unité de commande informatisé, tandis-que ce dernier comprend un microprocesseur interprétant les signaux reçus des capteurs et calculant le moment du couple résultant de l'effet de la charge sur la plate-forme, par combinaison des deux mesures de pression. D'autres caractéristiques et avantages de l'invention se dégageront de la description qui va suivre en regard des dessins annexés qui ne sont donnés qu'à titre d'exemples non limitatifs.According to another characteristic at least one of the lifting cylinders, and at least one of the tilting cylinders comprise a sensor, such as for example an oil pressure sensor which is connected to a computerized control module or unit , while the latter comprises a microprocessor interpreting the signals received from the sensors and calculating the moment of the torque resulting from the effect of the load on the platform, by combination of the two pressure measurements. Other characteristics and advantages of the invention will emerge from the description which follows with reference to the appended drawings which are given only by way of nonlimiting examples.
La figure 1 est une vue latérale de l'arrière du camion avec son hayon élévateur dans sa position rabattue de rangement, les vérins de levage et d'inclinaison connus en soi n'étant pas représentésFigure 1 is a side view of the rear of the truck with its tail lift in its folded storage position, the lifting and tilt cylinders known per se not being shown
La figure 2 est une vue arrière du camion.Figure 2 is a rear view of the truck.
Les figures 3, 4 et 5 sont les trois schémas de circuits hydrauliques donnés à titre d'exemple d'exécution.Figures 3, 4 and 5 are the three diagrams of hydraulic circuits given as an example of execution.
Le hayon selon l'invention portant la référence générale (1) est fixé à la partie arrière d'un véhicule, tel qu'un camion ou une remorque (3).The tailgate according to the invention bearing the general reference (1) is fixed to the rear part of a vehicle, such as a truck or a trailer (3).
Ledit hayon (1) est constitué d'une plate-forme élevatrice (5) reliée au châssis (4) du camion par des moyens de liaisons et de levage connus en soit et constitués d'un ensemble de bras de liaison et de levage (7) tandis que des vérins (8a, 8b- 9a, 9b) sont prévus pour mouvoir lesdits bras de liaison et tenir la plate-forme horizontale, lors de sa montée et de sa descenteSaid tailgate (1) consists of an elevating platform (5) connected to the chassis (4) of the truck by connection and lifting means known per se and consisting of a set of link and lifting arms ( 7) while jacks (8a, 8b- 9a, 9b) are provided to move said link arms and hold the platform horizontal, during its ascent and descent
Il est ainsi prévu des vérins de levage (8a, 8b) assurant le pivotement des bras de liaison et de levage (7) et des vérins d'inclinaison (9a, 9b) assurant la bonne position de la plate-forme (5) par rapport aux bras (7).There are thus provided lifting cylinders (8a, 8b) ensuring the pivoting of the linkage and lifting arms (7) and tilting cylinders (9a, 9b) ensuring the correct position of the platform (5) by relative to the arms (7).
Selon l'invention, l'un au moins des vérins de levage (8a, 8b), et l'un au moins des vérins d'inclinaison (9a, 9b) comprennent un capteur, comme par exemple un capteur de pression d'huile qui est relié à un module ou unité de commande informatisée.According to the invention, at least one of the lifting cylinders (8a, 8b), and at least one of the tilting cylinders (9a, 9b) comprise a sensor, such as for example an oil pressure sensor which is connected to a computerized control module or unit.
Les capteurs de pression d'huile sont par exemple disposés au contact direct ou indirect de l'huile de chacun des vérins correspondant.The oil pressure sensors are for example arranged in direct or indirect contact with the oil of each of the corresponding cylinders.
. Chacun des capteurs envoie donc des informations au module de commande qui comprend un microprocesseur interprétant les signaux et calculant le moment du couple résultant de l'effet de la charge sur la plateforme, par combinaison des deux mesures de pression. De sorte que, quelle que soit la disposition de la charge sur la plate-forme du hayon élévateur, et en prenant en compte l'effet levier, le poids de cette charge se trouve déterminé. La précision de la mesure dépend bien entendu, de la précision des capteurs (+/- 5 %) et de l'hystérésis des vérins. Une précision de type agrée «poids et mesure » peut être obtenue avec des capteurs plus sensibles que ceux fournis en standard.. Each of the sensors therefore sends information to the control module which includes a microprocessor interpreting the signals and calculating the moment of the torque resulting from the effect of the load on the platform, by combining the two pressure measurements. So that, whatever the position of the load on the platform of the tail lift, and taking into account the leverage, the weight of this load is determined. The accuracy of the measurement depends of course on the accuracy of the sensors (+/- 5%) and the hysteresis of the cylinders. Accuracy of the “weight and measurement” type can be obtained with more sensitive sensors than those supplied as standard.
Les mouvements du hayon élévateur sont pilotés par une carte électronique comprenant un microprocesseur auquel on a adjoint de la mémoire (EPROM programmable). En effet, le logiciel de la mémoire commande l'ouverture et la fermeture des électrovalves, et donc l'ouverture et la fermeture des vérins d'inclinaison et de levage, ainsi que des vérins ou systèmes d'extraction rétraction du mécanisme. Ainsi, plusieurs séquences préenregistrées permettent de commander le circuit hydraulique, et donc l'ensemble du hayon.The movements of the tail lift are controlled by an electronic card comprising a microprocessor to which memory has been added (programmable EPROM). In fact, the memory software controls the opening and closing of the solenoid valves, and therefore the opening and closing of the tilt and lift cylinders, as well as of the retraction or retraction mechanisms of the mechanism. Thus, several pre-recorded sequences make it possible to control the hydraulic circuit, and therefore the entire tailgate.
Ainsi, après analyse des informations fournies par les capteurs, le module de commande grâce à son processeur et sa programmation permet :Thus, after analyzing the information provided by the sensors, the control module thanks to its processor and its programming allows:
- d'empêcher la mise en route du levage dans le cas d'une masse trop importante par rapport à la capacité du hayon.- to prevent the start of the lifting in the case of a mass too large compared to the capacity of the tailgate.
- de peser les charges embarquées et vérifier ainsi que le poids des charges correspond à celui déclaré, et ainsi établir les factures correspondantes.- weigh the loads loaded and verify that the weight of the loads corresponds to that declared, and thus establish the corresponding invoices.
- de déterminer le poids total des charges embarquées et vérifier ainsi le poids total des charges sans dépasser la charge admissible, et ce en tenant compte des charges déchargées éventuelles et des charges embarquées éventuelles. Le processeur faisant alors la soustraction et additions nécessaires pour déterminer en temps réel la charge totale présente dans le camion.- determine the total weight of the loads loaded and thus check the total weight of the loads without exceeding the permissible load, taking into account any unloaded loads and any loaded loads. The processor then makes the subtraction and additions necessary to determine in real time the total load present in the truck.
Il va de soi que les capteurs pourraient être d'un autre type que celui décrit précédemment, comme par exemple de jauge de contrainte ou autres et/ ou placés à d'autres endroits de façon à pouvoir croiser les données et calculer ainsi le moment de la charge.It goes without saying that the sensors could be of another type than that described above, such as for example a strain gauge or other and / or placed in other places so as to be able to cross the data and thus calculate the moment of the charge.
La figure 3 est un schéma hydraulique donné à titre de premier exemple d'exécution, selon lequel l'un des vérins de levage (8) comprend un capteur de pression d'huile (10). Ledit capteur (10) est par exemple un capteur du type tout ou rien, qui peut avoir deux types de fonctionnement. L'un des fonctionnements étant tel qu'il est préréglé à la fermeture à une pression de zéro bar, et l'autre fonctionnement tel qu'il est préréglé à l'ouverture à une valeur seuil déterminée correspondant à la pression maximale autorisée.Figure 3 is a hydraulic diagram given as a first example of embodiment, according to which one of the lifting cylinders (8) comprises an oil pressure sensor (10). Said sensor (10) is for example an all or nothing type sensor, which can have two types of operation. One of the operations being such that it is preset at closing at a pressure of zero bar, and the other operating as it is preset at opening at a determined threshold value corresponding to the maximum authorized pressure.
Bien entendu, on peut utiliser deux capteurs pour obtenir les deux fonctions évoquées précédemment. L'un des capteurs est par exemple préréglé à la fermeture à zéro bar permettant la détection de l'arrivée et/ ou du décollage de la plate-forme par rapport au sol et grâce au module ou unité de commande, commande un relais qui met en marche l'action des vérins d'inclinaison (9) assurant ainsi une inclinaison parfaite par rapport au sol. L'autre des capteurs est par exemple préréglé à l'ouverture à une valeur seuil ou pression maximale correspondant à la valeur maximale de la charge admissible. Dès que ce seuil est atteint, l'unité de commande détecte alors une surcharge et soit déclenche une alarme avertissant l'utilisateur, soit interdit tout mouvement du hayon et par exemple la montée et/ ou la descente de la plate-forme.Of course, two sensors can be used to obtain the two functions mentioned above. One of the sensors is for example preset to close at zero bar allowing the detection of the arrival and / or takeoff of the platform relative to the ground and thanks to the module or control unit, controls a relay which switches in operation the action of the tilt cylinders (9) thus ensuring a perfect tilt relative to the ground. The other of the sensors is for example preset at the opening to a threshold value or maximum pressure corresponding to the maximum value of the admissible load. As soon as this threshold is reached, the control unit then detects an overload and either triggers an alarm warning the user, or prohibits any movement of the tailgate and for example the raising and / or lowering of the platform.
La figure 4 est une illustration d'un autre schéma hydraulique d'un deuxième exemple d'exécution selon lequel le capteur (11) disposé sur l'un des vérins de levage (8) est un capteur de pression dont le signal électrique est proportionnel à la pression. Ledit capteur (11) permettant d'obtenir les trois fonctions suivantes :Figure 4 is an illustration of another hydraulic diagram of a second embodiment according to which the sensor (11) disposed on one of the lifting cylinders (8) is a pressure sensor whose electrical signal is proportional with pressure. Said sensor (11) making it possible to obtain the following three functions:
- l'inclinaison automatique au sol par détection du zéro bar par actionnement du vérin d'inclinaison (9).- automatic tilting on the ground by detection of zero bar by actuation of the tilting cylinder (9).
- la détection des surcharges éventuelles par détection d'une valeur seuil déterminée et ainsi, et par exemple, interdit certains mouvements tels que la levée ou la descente de la plate-forme. - la pesée, c'est-à-dire l'évaluation et la détermination de la masse de la charge en intégrant la valeur de la pression mesurée dans une formule tenant compte du bras des leviers, des surfaces des sections des vérins et des phénomènes d'hystérésis.- Detection of possible overloads by detection of a determined threshold value and thus, and for example, prohibits certain movements such as lifting or lowering the platform. - weighing, that is to say the evaluation and determination of the mass of the load by integrating the value of the pressure measured in a formula taking account of the lever arm, the surfaces of the sections of the jacks and phenomena hysteresis.
La figure 5 est une autre mode d'exécution de circuit hydraulique selon lequel il est prévu deux capteurs, un premier capteur de pression (11) sur le vérin de levage (8a) et un second capteur de pression (12) sur le vérin d'inclinaison (9a). Ce qui permet en plus des fonctions obtenues avec le circuit des figures précédentes 3 et 4 de calculer le sur-moment, c'est-à- dire l'excès de moment dû à la charge sur la plate-forme et d'y associer les alarmes et/ ou les interdictions de mouvements nécessaires. Les vérins 21a et 21b sont des vérins utilisés pour la rétractation de l'ensemble du hayon sur le châssis du camion correspondant.Figure 5 is another embodiment of the hydraulic circuit according to which two sensors are provided, a first pressure sensor (11) on the lifting cylinder (8a) and a second pressure sensor (12) on the cylinder d 'tilt (9a). This allows in addition to the functions obtained with the circuit of the preceding figures 3 and 4 to calculate the over-moment, that is to say the excess of moment due to the load on the platform and to associate it alarms and / or movement restrictions required. The jacks 21a and 21b are jacks used for the retraction of the entire tailgate on the chassis of the corresponding truck.
Sur les trois schémas des figures 3, 4 et 5, le groupe hydroélectrique porte la référence (20).In the three diagrams in FIGS. 3, 4 and 5, the hydroelectric group bears the reference (20).
Bien entendu, l'invention n'est pas limitée aux modes de réalisation décrits et représentés à titre d'exemples, mais elle comprend aussi tous les équivalents techniques ainsi que leurs combinaisons. Of course, the invention is not limited to the embodiments described and shown by way of examples, but it also includes all the technical equivalents and their combinations.

Claims

REVENDICATIONS
1. Hayon élévateur (1) de véhicule du type constitué d'une plateforme élevatrice (5) pour assurer le déplacement , reliée au châssis (4) du véhicule par un ensemble de bras de liaison et de levage (7) tandis que des vérins (8a, 8b- 9a, 9b) sont prévus pour d'une part mouvoir lesdits bras de liaison et d'autre part tenir la plate-forme horizontale, lors de sa montée et de sa descente, à savoir au moins un vérin de levage (8a, 8b) assurant le pivotement des bras de liaison et de levage (7) et au moins un vérin d'inclinaison (9a, 9b) assurant la bonne position de la plate-forme (5) par rapport aux bras (7), caractérisé en ce qu'il est prévu des moyens de gestion et de contrôle.1. Lift tailgate (1) of a vehicle of the type consisting of a lifting platform (5) for movement, connected to the chassis (4) of the vehicle by a set of linkage and lifting arms (7) while jacks (8a, 8b- 9a, 9b) are provided for on the one hand moving said link arms and on the other hand holding the horizontal platform, during its ascent and descent, namely at least one lifting cylinder (8a, 8b) ensuring the pivoting of the linkage and lifting arms (7) and at least one tilt cylinder (9a, 9b) ensuring the correct position of the platform (5) relative to the arms (7) , characterized in that management and control means are provided.
2. Hayon élévateur (1) de véhicule selon la revendication 1, caractérisé en ce que les moyens de gestion et de contrôle comprennent au moins un capteur (10, 11, 11', 12) et un module ou unité de commande informatisée.2. Tail lift (1) of vehicle according to claim 1, characterized in that the management and control means comprise at least one sensor (10, 11, 11 ', 12) and a module or computerized control unit.
3. Hayon élévateur (1) de véhicule selon la revendication 2, caractérisé en ce que le capteur (10, 11, 11') est un capteur de pression d'huile disposé sur au moins l'un des vérins de levage (8a, 8b).3. vehicle tailgate (1) according to claim 2, characterized in that the sensor (10, 11, 11 ') is an oil pressure sensor disposed on at least one of the lifting cylinders (8a, 8b).
4. Hayon élévateur (1) de véhicule selon la revendication 3, caractérisé en ce que le capteur (10, 11, 11') est un capteur du type tout ou rien.4. Tail lift (1) vehicle according to claim 3, characterized in that the sensor (10, 11, 11 ') is an all or nothing type sensor.
5. Hayon élévateur (1) de véhicule selon la revendication 4, caractérisé en ce que le capteur (10, 11, 11') est un capteur du type préréglé à la fermeture à une pression de zéro bars.5. Tail lift (1) of vehicle according to claim 4, characterized in that the sensor (10, 11, 11 ') is a sensor of the type preset to close at a pressure of zero bars.
6. Hayon élévateur (1) de véhicule selon la revendication 4, caractérisé en ce que le capteur (10, 11, 11') est un capteur du type préréglé à l'ouverture à une valeur seuil déterminée correspondant à la valeur maximale autorisée.6. tailgate (1) of vehicle according to claim 4, characterized in that the sensor (10, 11, 11 ') is a sensor of the type preset at the opening to a determined threshold value corresponding to the maximum authorized value.
7. Hayon élévateur (1) de véhicule selon l'une quelconque des revendications 2 à 6, caractérisé en ce que l'un au moins des vérins d'inclinaison (9a, 9b) comprend un capteur (12), comme par exemple un capteur de pression d'huile qui est relié à un module ou unité de commande informatisée.7. tailgate (1) vehicle according to any one of claims 2 to 6, characterized in that at least one of the tilt cylinders (9a, 9b) comprises a sensor (12), such as for example a oil pressure sensor which is connected to a computerized control module or unit.
8. Hayon élévateur (1) de véhicule selon l'une quelconque des revendications précédentes, caractérisé en ce que le module de commande comprend un microprocesseur de commande dont la programmation permet :8. vehicle tail lift (1) according to any one of the preceding claims, characterized in that the control module comprises a control microprocessor whose programming allows:
- d'empêcher la mise en route du levage dans le cas d'une masse trop importante par rapport à la capacité du hayon, ou/ et- to prevent the start of lifting in the event of a mass that is too large in relation to the capacity of the tailgate, or / and
- de déclencher une alarme quand la charge est trop importante, ou/et- trigger an alarm when the load is too high, or / and
- de peser les charges embarquées et vérifier ainsi que le poids des charges correspond à celui déclaré, et ainsi établir les factures correspondantes, ou/ et de déterminer le poids total des charges embarquées et vérifier ainsi le poids total des charges sans dépasser la charge admissible, et ce en tenant compte des charges déchargées éventuelles et des charges embarquées éventuelles. Le processeur faisant alors la soustraction et additions nécessaires pour déterminer en temps réel la charge totale présente dans le camion.- weigh the loads loaded and verify that the weight of the loads corresponds to that declared, and thus establish the corresponding invoices, or / and determine the total weight of the loads loaded and thus verify the total weight of the loads without exceeding the admissible load , taking into account any discharged charges and any on-board charges. The processor then makes the subtraction and additions necessary to determine in real time the total load present in the truck.
9. Hayon élévateur (1) de véhicule selon l'une quelconque des revendications précédentes, caractérisé en ce que le module de commande comprend un microprocesseur interprétant les signaux reçus des capteurs et calculant le moment du couple résultant de l'effet de la charge sur la plate- forme, par combinaison des deux mesures de pression.9. vehicle tail lift (1) according to any one of the preceding claims, characterized in that the control module comprises a microprocessor interpreting the signals received from the sensors and calculating the moment of the torque resulting from the effect of the load on the platform, by combining the two pressure measurements.
10. Hayon élévateur (1) de véhicule selon l'une quelconque des revendications précédentes, caractérisé en ce les mouvements du hayon élévateur sont pilotés par une carte électronique comprenant un microprocesseur auquel on a adjoint de la mémoire (EPROM programmable), le logiciel de la mémoire commandant l'ouverture et la fermeture des électrovalves, et donc l'ouverture et la fermeture des vérins d'inclinaison et de levage, ainsi que des vérins ou systèmes d'extraction rétraction du mécanisme. 10. tailgate (1) vehicle according to any one of the preceding claims, characterized in that the movements of the tailgate are controlled by an electronic card comprising a microprocessor which has been added memory (programmable EPROM), the software the memory controlling the opening and closing of the solenoid valves, and therefore the opening and closing of the tilt and lift cylinders, as well as of the retraction or retraction mechanisms of the mechanism.
PCT/FR2000/002345 1999-08-19 2000-08-19 Improvement to vehicle lifting tail gate WO2001014167A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP00958710A EP1121271A1 (en) 1999-08-19 2000-08-19 Improvement to vehicle lifting tail gate
AU70147/00A AU7014700A (en) 1999-08-19 2000-08-19 Improvement to vehicle lifting tail gate

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9910831 1999-08-19
FR99/10831 1999-08-19

Publications (1)

Publication Number Publication Date
WO2001014167A1 true WO2001014167A1 (en) 2001-03-01

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PCT/FR2000/002345 WO2001014167A1 (en) 1999-08-19 2000-08-19 Improvement to vehicle lifting tail gate

Country Status (3)

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EP (1) EP1121271A1 (en)
AU (1) AU7014700A (en)
WO (1) WO2001014167A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT412963B (en) * 2002-09-10 2005-09-26 Doneus Guenter CONTROL DEVICE FOR HYDRAULIC WORKING CYLINDERS
WO2008089880A3 (en) * 2007-01-23 2008-12-24 Maier Gmbh Peter Method for operating a lift gate
CN103231677A (en) * 2013-05-07 2013-08-07 程东霁 Pressure digital display remote control anti-overloading automobile tail plate
EP2487066A3 (en) * 2011-02-11 2013-09-18 MBB Palfinger GmbH Method for controlling a cantilever lift
AU2008201151B2 (en) * 2007-03-30 2014-02-06 Gisela Weber Hydraulically actuated tailgate loader

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2627584A1 (en) * 1988-02-19 1989-08-25 Gonod Andre Vehicle tail gate with integral weighing mechanism - has hydraulic raising lowering and rocking actuators and self compensating weight reception table
DE3916048A1 (en) * 1989-05-17 1990-11-22 Soerensen Hydraulik Gmbh Vehicular lifting platform actuated by three switch pedals - is lowered or raised by signals from decoder of foot movement from outer to central pedal
EP0452821A1 (en) * 1990-04-19 1991-10-23 OTTO LIFT-SYSTEME GmbH Weighing device for waste container on a refuse collecting device
US5666295A (en) * 1996-01-05 1997-09-09 Sentek Products Apparatus and method for dynamic weighing of loads in hydraulically operated lifts
EP0832783A1 (en) * 1996-09-25 1998-04-01 Pabco, Co., Ltd. Lift control mechanism and method
DE29722334U1 (en) * 1997-12-12 1998-06-18 Soerensen Hydraulik Gmbh Tail lift system with overload protection
WO1998040239A1 (en) * 1997-03-07 1998-09-17 Gisela Weber Control device for hydraulic power cylinders

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2627584A1 (en) * 1988-02-19 1989-08-25 Gonod Andre Vehicle tail gate with integral weighing mechanism - has hydraulic raising lowering and rocking actuators and self compensating weight reception table
DE3916048A1 (en) * 1989-05-17 1990-11-22 Soerensen Hydraulik Gmbh Vehicular lifting platform actuated by three switch pedals - is lowered or raised by signals from decoder of foot movement from outer to central pedal
EP0452821A1 (en) * 1990-04-19 1991-10-23 OTTO LIFT-SYSTEME GmbH Weighing device for waste container on a refuse collecting device
US5666295A (en) * 1996-01-05 1997-09-09 Sentek Products Apparatus and method for dynamic weighing of loads in hydraulically operated lifts
EP0832783A1 (en) * 1996-09-25 1998-04-01 Pabco, Co., Ltd. Lift control mechanism and method
WO1998040239A1 (en) * 1997-03-07 1998-09-17 Gisela Weber Control device for hydraulic power cylinders
DE29722334U1 (en) * 1997-12-12 1998-06-18 Soerensen Hydraulik Gmbh Tail lift system with overload protection

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT412963B (en) * 2002-09-10 2005-09-26 Doneus Guenter CONTROL DEVICE FOR HYDRAULIC WORKING CYLINDERS
WO2008089880A3 (en) * 2007-01-23 2008-12-24 Maier Gmbh Peter Method for operating a lift gate
AU2008201151B2 (en) * 2007-03-30 2014-02-06 Gisela Weber Hydraulically actuated tailgate loader
EP2487066A3 (en) * 2011-02-11 2013-09-18 MBB Palfinger GmbH Method for controlling a cantilever lift
CN103231677A (en) * 2013-05-07 2013-08-07 程东霁 Pressure digital display remote control anti-overloading automobile tail plate

Also Published As

Publication number Publication date
AU7014700A (en) 2001-03-19
EP1121271A1 (en) 2001-08-08

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