EP3188999B1 - Man lift and method of operating such a man lift - Google Patents

Man lift and method of operating such a man lift Download PDF

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Publication number
EP3188999B1
EP3188999B1 EP15763263.9A EP15763263A EP3188999B1 EP 3188999 B1 EP3188999 B1 EP 3188999B1 EP 15763263 A EP15763263 A EP 15763263A EP 3188999 B1 EP3188999 B1 EP 3188999B1
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EP
European Patent Office
Prior art keywords
generator
pump
mode
battery unit
man lift
Prior art date
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Active
Application number
EP15763263.9A
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German (de)
French (fr)
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EP3188999A1 (en
Inventor
Didier Desseux
Slaheddine Beji
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Haulotte Group SA
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Haulotte Group SA
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Publication of EP3188999A1 publication Critical patent/EP3188999A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/044—Working platforms suspended from booms
    • B66F11/046—Working platforms suspended from booms of the telescoping type

Definitions

  • the present invention relates to a lifting platform.
  • the invention also relates to a method of implementing such a lifting platform.
  • the field of the invention is that of aerial work platforms equipped with a lifting system.
  • an aerial platform comprises a chassis, a hoisting system, at least two axles and a power supply assembly.
  • Each axle includes wheels and a wheel drive system.
  • the power pack is configured to selectively power the lift system and the wheel drive systems.
  • the power supply has different modes of operation depending on the conditions of use of the nacelle.
  • the power supply assembly includes a control unit, a battery, a hydraulic pump and an electric pump motor.
  • the lifting system is powered by the hydraulic pump, which is powered by the electric pump motor.
  • the rear axle comprises two wheels each driven by an electric motor, powered by battery power.
  • the front axle comprises two wheels each driven by a hydraulic motor, supplied with hydraulic energy by the pump.
  • the power pack is configured to drive either the rear wheels alone, or both the rear wheels and the front wheels. In other words, the drive of the wheels is mainly electric, with a possible hydraulic assistance.
  • EP-A-1,967,486 discloses a lifting platform comprising a heat engine, a generator and a pumping system which drives elevation means.
  • the heat engine and the pumping system are coupled to the generator, which is powered by a battery.
  • the generator can be used either as an electric motor or as a power generator.
  • the object of the present invention is to provide an improved aerial platform, particularly in terms of versatility.
  • the invention relates to a lifting platform, comprising a frame; a lifting system; a first axle comprising two wheels and a hydraulic drive system of these two wheels; a second axle comprising two wheels and an electric drive system of these two wheels; and a power supply assembly that has different modes of operation and is configured to selectively power the lift system, the hydraulic drive system, and the electric drive system.
  • the aerial platform is characterized in that the power supply assembly includes a heat engine, a pumping system, a generator and a battery unit; in that the pumping system is coupled to the engine, the generator, the hoist and the hydraulic drive system; in that the battery unit is coupled to the generator and the drive system; in that the aerial platform comprises a turret that supports the lifting system and is rotatable relative to the frame about a vertical axis of rotation; and in that the engine engine turret, while the generator and the battery unit equip the chassis.
  • the power supply assembly includes a heat engine, a pumping system, a generator and a battery unit; in that the pumping system is coupled to the engine, the generator, the hoist and the hydraulic drive system; in that the battery unit is coupled to the generator and the drive system; in that the aerial platform comprises a turret that supports the lifting system and is rotatable relative to the frame about a vertical axis of rotation; and in that the engine engine turret, while the generator and the battery unit equip the
  • the nacelle has a hybrid architecture combining thermal and electrical energy sources.
  • the invention makes it possible to optimize the operation of the nacelle according to its environment and its conditions of use, in particular according to whether the nacelle is used outside or inside a building.
  • the nacelle has a great versatility.
  • the invention makes it possible to move the nacelle mainly using the hydraulic drive system or mainly the electric drive system.
  • known nacelles In comparison, known nacelles generally have mainly hydraulic or mainly electrical drive systems. The efficiency of an electric drive system is greater than the efficiency of a hydraulic drive system. Nacelles with mainly hydraulic drive systems have limited autonomy in indoor use. Nacelles with primarily electric drive systems overheat in outdoor use on rough terrain where high power may be needed for a long time.
  • a known type of platform includes a turret that supports the lifting system and is rotatable relative to the frame about a vertical axis of rotation.
  • the heat engine and its reservoir are generally positioned in the turret to limit the height of the frame and improve the stability of the nacelle.
  • the transmission of power between the turret and the chassis is carried out by electric cables of large section. To avoid damaging these cables, the articulation between the turret and the chassis is limited in movement. 360 ° continuous rotation of the turret relative to the frame is therefore not possible, which reduces the versatility of the machine.
  • the nacelle 1 comprises a frame 10 and a turret 12 separated by a connecting interface 14.
  • the frame 10 comprises a base 11, a steering system 13, a front axle 20 and a rear axle 30.
  • the turret 12 comprises a system 18 and is movable in rotation about a vertical axis relative to the frame 10.
  • the frame 10 has a low height, for example a maximum height of 1 meter from the ground.
  • the lifting system 18 includes a hydraulic distributor 59 and at least one hydraulic cylinder 19.
  • the system 18 includes three jacks 19.
  • the jacks 19 can actuate at least one elevator equipment, not shown for simplification purposes, equipping the nacelle 1.
  • the lifting system 18 can operate a telescopic arm articulated on the turret 12, with a mobile platform arranged at the end of the telescopic arm.
  • each cylinder 19 can actuate a separate elevator equipment.
  • the front axle 20 comprises a left front wheel 21 and a front right wheel 22, each coupled to a hydraulic motor, respectively 23 or 24.
  • the rear axle 30 comprises a left rear wheel 31 and a right rear wheel 32, each coupled to an electric motor, respectively 33 or 34.
  • the electric motors 33 and 34 are not reversible.
  • the wheels 21, 22, 31 and 32 are pivotally mounted, each about a horizontal axis, relative to the frame 10.
  • the hydraulic motors 23 and 24 form a hydraulic drive system 23 + 24 of the wheels 21 and 22, while that the electric motors 33 and 34 form an electric drive system 33 + 34 of the wheels 31 and 32.
  • the steering system 13 is coupled with the front axle 20.
  • the front axle 20 is steering and the front wheels 21 and 22 are steered.
  • the nacelle 1 is also equipped with a power supply assembly 40, which has different operating modes M1 to M10 illustrated in FIG. figure 3 in order to adapt to the environment and the conditions of use of the nacelle 1.
  • the assembly 40 is configured to selectively supply power to the steering system 13, the hoisting system 18, the hydraulic motors 23 and 24 and the electric motors 33 and 34.
  • the nacelle 1 is equipped with a control system, not shown for purposes of simplification, for selecting an operating mode of the set 40 among the operating modes M1 to M10.
  • the power supply assembly 40 comprises a heat engine 41, a pumping system 50 and an electrical system 60, including a generator 61 and a battery unit 62.
  • the assembly 40 makes it possible to transmit high power through the generator. connection 14 between the frame 10 and the turret 12, in particular the heat engine 41 to the battery unit 62.
  • the components of the assembly 40 are positioned so as to optimize the stability of the nacelle 1, as detailed below.
  • the heat engine 41 is an internal combustion engine.
  • the engine 41 and its fuel tank, not shown for simplification purposes, are mounted on the turret 12.
  • the engine 41 can be mounted on the turret 12 opposite the lifting system 18, with respect to the the axis of rotation of the turret 12 on the frame 10, so as to optimize the stability of the platform 1.
  • the motor 41 is constantly arranged as a counterweight to the lifting structure, regardless of the angular position of the turret 12.
  • the motor 41 is coupled to the pumping system 50, as detailed below.
  • the engine 41 allows the nacelle 1 to have autonomy and power in off-road use, without reducing the reserve of electrical energy of the battery unit 62. Also, the motor 41 ensures the operation of nacelle 1 when no electric recharge source is available to recharge the battery unit 62.
  • the pumping system 50 includes a first pump 52 mounted on the turret 12, as well as a hydraulic motor 53 and a second pump 54 mounted on the frame 10.
  • the pumps 52 and 54 are variable displacement pumps.
  • the pumping device 50 can feed the hydraulic motors 23 and 24 to drive the wheels 21 and 22.
  • the pumping device 50 can actuate the steering system 13 and / or lifting system 18.
  • the pump 52 is mechanically coupled to the heat engine 41, so that the motor 41 can drive the pump 52.
  • the hydraulic motor 53 is hydraulically coupled to the pump 52 via lines 73 and 74, so that the pump 52 can drive the pump. motor 53.
  • the pump 52, the motor 54 and the ducts 73 and 74 form a closed hydraulic circuit, independent of the other hydraulic circuits equipping the platform 1.
  • the hydraulic motor 53 is fixed displacement.
  • the hydraulic motor 53 is mechanically coupled to the pump 54 via a mechanical coupling device 98, so that the motor 53 can drive the pump 54.
  • the mechanical coupling device 98 between the motor 53 and the pump 54 comprises for example a clutch or a freewheel mechanism.
  • the motor 53 and the pump 54 can be selectively coupled or decoupled mechanically.
  • the pump 54 is connected to a hydraulic reservoir 56 via a pipe 78.
  • the pump 54 operates in an open circuit.
  • the pump 54 is hydraulically connected to a distribution block 57 via lines 71 and 72.
  • the distribution block 57 is hydraulically connected to a distributor block 58 via lines 81 and 82.
  • the distribution block 57 is connected hydraulically to the steering system 13 via lines 91 and 92.
  • the distributor block 57 is hydraulically connected to a distributor block 59 via lines 93 and 94.
  • the distributor block 58 is hydraulically connected to the hydraulic motor 23 via lines 83 and 84 and to the hydraulic motor 24 via lines 85 and 86.
  • the distributor block 59 is hydraulically connected to the cylinders 19.
  • the pump 54 is hydraulically coupled to the steering system 13, the lifting system 18 and the hydraulic motors 23 and 24.
  • the pumping system 50 is partly mounted on the frame 10 and partly mounted on the turret 12.
  • the lines 73, 74, 93 and 94 connect hydraulically the turret 12 to the frame 10 through connecting members 75, 76, 95 and 96 disposed between the frame 10 and the turret 12.
  • the connecting members 75, 76, 95, 96 disposed between the frame 10 and the turret 12 are each formed by a duct of a hydraulic rotary joint which forms the connecting interface 14.
  • This hydraulic rotary joint is shown more precisely at the figure 9 .
  • the connection interface 14 comprises a hollow cylinder 141 fixed with respect to the frame 10 and a central shaft 142 integral in rotation with the turret 12 and pivotally mounted in the hollow cylinder 141 along the axis of rotation of the turret 12.
  • conduits comprises a connection port 143 passing through the wall of the cylinder 141, a connection port 144 formed in the central shaft 142, extended by an axial conduit 145 comprising a radial outlet 146 on an outer surface of the central shaft 142, and a groove 147 formed on the inner surface of the hollow cylinder 141 in the radial alignment of the connection port 143 of the hollow cylinder 141 and the outlet 147.
  • Each conduit allows, thanks to the peripheral groove, the permanent passage of the hydraulic fluid whatever the angle of orientation of the turret 12 relative to the frame 10. Only one of the connection ports 144 of the central shaft 142 is visible on the figure 9 , the other connection ports being angularly offset.
  • connection ports 148 of the hollow cylinder 141 and their associated groove 149 are visible, offset axially with respect to the connection port 143.
  • Each of the ducts of the hydraulic rotary joint defines an independent fluid path by virtue of the angular offset of the ports 144 of the central shaft 142 and the axial offset of the ports 143 and 148 of the hollow cylinder 141.
  • the electrical system 60 ensures full operation of the nacelle 1 indoors, avoiding the use of the engine 41 and with a significant autonomy.
  • the electrical system 60 makes it possible to move the platform 1 with the axle 30 which is driving and to actuate the lifting system 18 simultaneously or separately, without using the heat engine 41.
  • the electrical system 60 is mounted on the chassis 10.
  • the electrical system 60 includes the generator 61, the battery unit 62, a device 63 for electrically connecting the battery unit 62 to the mains, and a dimmer unit 64 including electric dimmers.
  • the device 63 makes it possible to recharge the battery unit 62.
  • the device 63 comprises an electrical socket.
  • the electrical system 60 also includes electrical cables 65, 66, 67 and 68.
  • the generator 61 is electrically connected to the drive block 64 via the cables 65.
  • the battery unit 62 is electrically connected to the drive unit 64 via the cables 66.
  • the electric motor 33 is electrically connected to the drive block 64 via the cables 67.
  • the electric motor 34 is electrically connected to the drive block 64 via the cables 68.
  • the generator 61 is an electric motor coupled to the pump 54 and the battery unit 62.
  • the generator 61 has sufficient power to operate the hoist system 18 or the battery unit recharge 62, i.e. of the order of 3 to 15 kW.
  • the generator 61 is distinct from the electric motors 33 and 34.
  • the generator 61 is mechanically coupled to the pump 54 via a mechanical coupling device 97. Depending on the operating mode of the assembly 40, the generator 61 can drive the pump 54 uncoupled from the motor 53, or the pump 54 coupled to the motor 53 can drive the generator 61.
  • the battery unit 62 includes one or more batteries.
  • the battery unit 62 comprises a high power battery, that is to say a power of the order of 200 to 600 Ah.
  • the battery unit 62 may power the generator 61 to drive the pump 54, or the generator 61 driven by the pump 54 can recharge the battery unit 62.
  • the battery unit 62 can be recharged by connecting the plug 63 to the mains.
  • the battery unit 62 can power the electric motors 33 and 34 to drive the wheels 31 and 32.
  • modes of operation comprise a mode M1 used indifferently outside or inside, modes M2 to M7 used preferably outdoors, and modes M8 to M10 used preferably indoors.
  • the term “outside” means outside a building, for example on a road or on any land, while the term “inside” means in a building, for example in a workshop, warehouse or hangar.
  • Modes M1 and M8 to M10 the heat engine 41 is at a standstill. Modes M8 to M10 can also be used outdoors.
  • Modes M2 to M7 the heat engine 41 is running. Modes M2 to M7 are not used indoors to avoid the use of the heat engine 41 indoors, although it is technically possible.
  • platform 1 In modes M1, M2, M6 and M9, platform 1 is stationary.
  • the axles 20 and 30 are non-motor.
  • the nacelle 1 In the modes M3, M4, M5, M7, M8 and M10, the nacelle 1 is mobile in translation to the ground. In modes M3, M4 and M7, the axle 20 is motor while the axle 30 is non-motor. In modes M8 and M10, the axle 20 is non-motor while the axle 30 is motor. In the M5 mode, the axles 20 and 30 are both engines. In other words, depending on the operating mode of the assembly 40, the nacelle 1 is propelled in translation on the ground either by the hydraulic drive system 23 + 24, or by the electric drive system 33 + 34, or simultaneously by the hydraulic drive system 23 + 24 and the electric drive system 33 + 34.
  • the device 63 In the M1 mode referred to as "mains charging mode", the device 63 is connected to the mains power supply so as to recharge the battery unit 62.
  • the motor 41, the pumping system 50 and the generator 61 are at a standstill.
  • the heat engine 41 actuates the pump 52 having a cylinder C1, so as to rotate the motor 53 at a speed N1.
  • the motor 53 drives the pump 54 and the generator 61 via the mechanical coupling devices 97 and 98.
  • the displacement of the pump 52 and the speed of the motor 53 could be different for each operating mode.
  • the pump 54 In the M2 mode called "generator charging mode", the pump 54 is set with a zero displacement. Thus, the motor 53 drives the generator 61, which produces electric current for recharging the battery unit 62.
  • the pump 54 In the mode M3 called "simple external translation mode", the pump 54 is set with a non-zero displacement and feeds the hydraulic motors 23 and 24 to move the platform 1. If necessary, the pump 54 also feeds the steering system 13 to orienting the steered wheels 21 and 22 and thus steer the platform 1. At the same time, the generator 61 generates electric current for recharging the battery unit 62.
  • the heat engine 41 actuates the pump 52 having a displacement C2 different from the displacement C1, so as to turn the motor 53 at a speed N2 greater than the speed N1.
  • the motor 53 drives the pump 54 and the generator 61 via the devices of mechanical coupling 97 and 98.
  • the pump 54 has a maximum displacement and the generator 61 is in free rotation.
  • the pump 54 supplies the hydraulic motors 23 and 24 to move the platform 1 at a speed greater than the speed of the M3 mode. If necessary, the pump 54 also feeds the steering system 13 to orient the steering wheels 21 and 22 and thus direct the platform 1.
  • the battery unit 62 is neither charging nor discharging.
  • the pump 54 In the M5 mode called "maximum external power translation mode", the pump 54 is set with a non-zero displacement and the generator 61 is in free rotation.
  • the pump 54 supplies the hydraulic motors 23 and 24, while the battery unit 62 supplies the electric motors 33 and 34 to move the platform 1. If necessary, the pump 54 also supplies the steering system 13 to orient the wheels 21 and 22 and thus to control the pod 1.
  • the pump 54 In the mode M6 called "external lifting mode", the pump 54 is set with a non-zero displacement and feeds the lifting system 18.
  • the generator 61 produces electric current for recharging the battery unit 62.
  • Modes M4 and M6 are technically possible to combine modes M4 and M6 or modes M5 and M6. However, for safety and energy saving reasons, it is best to combine the M3 and M6 modes, which corresponds to the M7 mode. Modes M3 to M6 are generally used in preference to M7 mode.
  • the pump 54 In the M7 mode called "translation mode and external lifting", the pump 54 is set with a non-zero displacement and the generator 61 is in free rotation. The pump 54 supplies both the hydraulic motors 23 and 24 and the lifting system 18. If necessary, the pump 54 also feeds the steering system 13 to orient the steering wheels 21 and 22 and thus to direct the platform 1. In the At the same time, the battery unit 62 is neither charging nor discharging.
  • the battery unit 62 supplies the electric motors 33 and 34, to move the platform 1. If necessary, the battery unit 62 also supplies the generator 61, which actuates the pump 54, which feeds the steering system 13 to orient the steering wheels 21 and 22 and thus direct the nacelle 1.
  • the battery unit 62 supplies the generator 61, which actuates the pump 54, which supplies the lifting system 18.
  • the battery unit 62 supplies both the electric motors 33 and 34 and the generator 61.
  • Generator 61 actuates the pump 54, which feeds the lifting system 18 and, if necessary, the steering system 13.
  • the lifting system 18 is powered by the pumping system 50, which is actuated by the generator 61, which is powered by the battery unit 62, while the heat engine 41 is stopped.
  • FIG. 4 to 8 are represented different variants of aerial platform 1 according to the invention.
  • certain constituent elements of the aerial platform 1 are comparable to those of the first embodiment described above and, for the sake of simplification, bear the same numerical references. Only the constituent elements having differences with the first embodiment carry new numerical references.
  • the assemblies 140, 240 and 340 have certain differences with the assembly 40. Except for the differences hereafter, the operation of the nacelle 1 is globally comparable in the different embodiments.
  • the embodiment of the figure 4 has a hydraulic coupling device 198 can be substituted for the mechanical coupling device 98 between the motor 53 and the pump 54.
  • the assembly 140 comprises a pumping system 150 including a hydraulic motor 153 with variable displacement, between a displacement of zero value and a maximum displacement.
  • the generator 61 and the motor 153 are coupled via the mechanical coupling device 97.
  • the motor 153 and the pump 54 are coupled via the hydraulic coupling device 198.
  • the motor 153 In the modes M2, M3 and M5 to M7, the motor 153 has a cylinder C11, while in the M4 mode, the engine 153 has a cylinder capacity C12 less than C11.
  • the embodiment of the figures 5 and 6 presents an additional pump 255 which can be substituted for the distribution block 57.
  • the assembly 240 comprises a pumping system 250 including the first pump 52, the motor 53, a second pump 254 and a third pump 255.
  • the generator 61 and the pump 255 are coupled via the mechanical coupling device 97.
  • the motor 53 and the pump 254 are coupled via the mechanical coupling device 298, including for example a clutch or free wheel mechanism.
  • the pumps 254 and 255 are coupled via a hydraulic coupling device 299 and connected to the reservoir 56 via lines 78 and 279, respectively.
  • Pumps 254 and 255 operate in open circuit.
  • the pump 255 is indirectly coupled to the motor 53.
  • the pump 254 and the reservoir 56 are connected to the distributor block 58 via lines 281 and 282.
  • the distributor block 58 is connected to the steering system 13 via pipes 291 and 292.
  • the pump 255 and the reservoir 56 are connected to the distributor block 59 of the lifting system 18 via lines 293 and
  • the pump 254 has a non-zero displacement in the modes M3, M4, M5 and M7 for supplying the hydraulic drive system 23 + 24 and the steering system 13 with a maximum displacement in the mode M4; a non-zero displacement in modes M8 and M10 for supplying the steering system 13; and a zero displacement in the other modes of operation.
  • the pump 255 has a non-zero displacement in modes M6, M7, M9 and M10 to supply the lifting system 18; and a zero displacement in the other modes of operation.
  • the embodiment of the figures 7 and 8 discloses a closed-loop reciprocating hydraulic drive system, also known as a hydrostatic transmission, including the pump 354.
  • the assembly 340 includes a pumping system 350 including the first pump 52, the motor 53, a second pump 354, and a third pump 355.
  • the generator 61 and the pump 355 are coupled via the mechanical coupling device 97.
  • the motor 53 and the pump 354 are coupled via the mechanical coupling device 398, comprising for example a clutch or a freewheeling mechanism .
  • the pumps 354 and 355 are coupled via the hydraulic coupling device 399.
  • the pump 355 is connected to the reservoir 56 via a line 379.
  • the pump 354 operates in a closed circuit, while the pump 355 operates in an open circuit.
  • the pump 355 is indirectly coupled to the motor 53.
  • the pump 354 is connected to the distributor block 58 via lines 381 and 382.
  • the pump 355 and the reservoir 56 are connected to the distributor block 357 via lines 371 and 372.
  • the pump 355 and the tank 56 are connected to the distributor block 59 of the lifting system 18 via these same lines 371 and 372 and via lines 393 and 394 which are directly connected to the lines 371 and 372, upstream of the distributor block 357.
  • the distributor block 357 is connected to the steering system 13 via lines 91 and 92.
  • the pump 354 has a non-zero displacement in modes M3, M4, M5 and M7 for supplying the hydraulic drive system 23 + 24, with a maximum displacement in the mode M4; a non-zero displacement in modes M8 and M10 for supplying the steering system 13; and zero cubic capacity in the other modes.
  • the pump 255 has a non-zero displacement in the modes M3, M4, M5 and M8 in order to supply the steering system 13; a non-zero displacement in modes M6 and M9 to supply the lifting system 18; a non-zero displacement in modes M7 and M10 to supply the steering system 13 and the lifting system 18; and a zero displacement in the other modes of operation.
  • the pod 1 may be shaped differently from the Figures 1 to 9 without departing from the scope of the invention.
  • the technical characteristics of the various embodiments and variants mentioned above may be, in whole or in part, combined with one another.
  • the aerial platform 1 can be adapted in terms of cost, ergonomics and performance.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Description

La présente invention concerne une nacelle élévatrice. L'invention concerne également un procédé de mise en oeuvre d'une telle nacelle élévatrice. Le domaine de l'invention est celui des nacelles élévatrices équipées d'un système de levage.The present invention relates to a lifting platform. The invention also relates to a method of implementing such a lifting platform. The field of the invention is that of aerial work platforms equipped with a lifting system.

De manière classique, une nacelle élévatrice comprend un châssis, un système de levage, au moins deux essieux et un ensemble d'alimentation en énergie. Chaque essieu comprend des roues et un système d'entraînement des roues. L'ensemble d'alimentation est configuré pour alimenter sélectivement en énergie le système de levage et les systèmes d'entraînement des roues. L'ensemble d'alimentation présente différents modes de fonctionnement en fonction des conditions d'utilisation de la nacelle.Conventionally, an aerial platform comprises a chassis, a hoisting system, at least two axles and a power supply assembly. Each axle includes wheels and a wheel drive system. The power pack is configured to selectively power the lift system and the wheel drive systems. The power supply has different modes of operation depending on the conditions of use of the nacelle.

EP-A-1 294 587 décrit un exemple d'une telle nacelle élévatrice. L'ensemble d'alimentation en énergie comprend une unité de contrôle, une batterie, une pompe hydraulique et un moteur électrique de pompe. Le système de levage est actionné par la pompe hydraulique, qui est actionnée par le moteur électrique de pompe. L'essieu arrière comprend deux roues entraînées chacune par un moteur électrique, alimenté en énergie électrique par la batterie. L'essieu avant comprend deux roues entraînées chacune par un moteur hydraulique, alimenté en énergie hydraulique par la pompe. Pour déplacer la nacelle, l'ensemble d'alimentation est configuré pour entraîner soit les roues arrière seules, soit à la fois les roues arrière et les roues avant. Autrement dit, l'entraînement des roues est principalement électrique, avec une possible assistance hydraulique. EP-A-1,294,587 describes an example of such an aerial lift. The power supply assembly includes a control unit, a battery, a hydraulic pump and an electric pump motor. The lifting system is powered by the hydraulic pump, which is powered by the electric pump motor. The rear axle comprises two wheels each driven by an electric motor, powered by battery power. The front axle comprises two wheels each driven by a hydraulic motor, supplied with hydraulic energy by the pump. To move the platform, the power pack is configured to drive either the rear wheels alone, or both the rear wheels and the front wheels. In other words, the drive of the wheels is mainly electric, with a possible hydraulic assistance.

US-A-2011/0198141 décrit une plateforme élévatrice selon le préambule de la revendication 1. EP-A-1 967 486 décrit une plateforme élévatrice comprenant un moteur thermique, une génératrice et un système de pompage qui entraîne des moyens d'élévation. Le moteur thermique et le système de pompage sont couplés à la génératrice, qui est alimentée par une batterie. La génératrice peut être utilisée soit comme moteur électrique soit comme générateur de courant. US-2011/0198141 discloses a lifting platform according to the preamble of claim 1. EP-A-1,967,486 discloses a lifting platform comprising a heat engine, a generator and a pumping system which drives elevation means. The heat engine and the pumping system are coupled to the generator, which is powered by a battery. The generator can be used either as an electric motor or as a power generator.

Le but de la présente invention est de proposer une nacelle élévatrice améliorée, notamment en termes de polyvalence.The object of the present invention is to provide an improved aerial platform, particularly in terms of versatility.

A cet effet, l'invention a pour objet une nacelle élévatrice, comprenant un châssis ; un système de levage ; un premier essieu comportant deux roues et un système d'entraînement hydraulique de ces deux roues ; un deuxième essieu comportant deux roues et un système d'entraînement électrique de ces deux roues ; et un ensemble d'alimentation en énergie qui présente différents modes de fonctionnement et qui est configuré pour alimenter sélectivement en énergie le système de levage, le système d'entraînement hydraulique et le système d'entraînement électrique. La nacelle élévatrice est caractérisée en ce que l'ensemble d'alimentation en énergie inclut un moteur thermique, un système de pompage, une génératrice et une unité de batterie ; en ce que le système de pompage est couplé au moteur thermique, à la génératrice, au système de levage et au système d'entraînement hydraulique ; en ce que l'unité de batterie est couplée à la génératrice et au système d'entraînement ; en ce que la nacelle élévatrice comprend une tourelle qui supporte le système de levage et qui est mobile en rotation par rapport au châssis autour d'un axe vertical de rotation ; et en ce que le moteur thermique équipe la tourelle, tandis que la génératrice et l'unité de batterie équipent le châssis.For this purpose, the invention relates to a lifting platform, comprising a frame; a lifting system; a first axle comprising two wheels and a hydraulic drive system of these two wheels; a second axle comprising two wheels and an electric drive system of these two wheels; and a power supply assembly that has different modes of operation and is configured to selectively power the lift system, the hydraulic drive system, and the electric drive system. The aerial platform is characterized in that the power supply assembly includes a heat engine, a pumping system, a generator and a battery unit; in that the pumping system is coupled to the engine, the generator, the hoist and the hydraulic drive system; in that the battery unit is coupled to the generator and the drive system; in that the aerial platform comprises a turret that supports the lifting system and is rotatable relative to the frame about a vertical axis of rotation; and in that the engine engine turret, while the generator and the battery unit equip the chassis.

Ainsi, la nacelle présente une architecture hybride combinant des sources d'énergie thermiques et électriques. L'invention permet d'optimiser le fonctionnement de la nacelle en fonction de son environnement et de ses conditions d'utilisation, en particulier selon que la nacelle est utilisée à l'extérieur ou à l'intérieur d'un bâtiment. La nacelle présente une polyvalence importante. En particulier, l'invention permet de déplacer la nacelle en utilisant principalement le système d'entraînement hydraulique ou principalement le système d'entraînement électrique.Thus, the nacelle has a hybrid architecture combining thermal and electrical energy sources. The invention makes it possible to optimize the operation of the nacelle according to its environment and its conditions of use, in particular according to whether the nacelle is used outside or inside a building. The nacelle has a great versatility. In particular, the invention makes it possible to move the nacelle mainly using the hydraulic drive system or mainly the electric drive system.

En comparaison, les nacelles connues présentent généralement des systèmes d'entraînement principalement hydrauliques ou bien principalement électriques. Le rendement d'un système d'entraînement électrique est supérieur au rendement d'un système d'entraînement hydraulique. Les nacelles à systèmes d'entraînement principalement hydrauliques présentent une autonomie limitée en utilisation intérieure. Les nacelles à systèmes d'entraînement principalement électriques surchauffent en utilisation extérieure sur un terrain accidenté où une forte puissance peut être nécessaire pendant une longue durée.In comparison, known nacelles generally have mainly hydraulic or mainly electrical drive systems. The efficiency of an electric drive system is greater than the efficiency of a hydraulic drive system. Nacelles with mainly hydraulic drive systems have limited autonomy in indoor use. Nacelles with primarily electric drive systems overheat in outdoor use on rough terrain where high power may be needed for a long time.

Egalement, un type de nacelle connu comprend une tourelle qui supporte le système de levage et qui est mobile en rotation par rapport au châssis autour d'un axe vertical de rotation. Dans ce type de nacelle, le moteur thermique et son réservoir sont généralement positionnés dans la tourelle pour limiter la hauteur du châssis et améliorer la stabilité de la nacelle. Dans le cas où ces nacelles sont équipées d'un système d'entrainement électrique, la transmission de puissance entre la tourelle et le châssis est réalisée par des câbles électriques de section importante. Pour ne pas endommager ces câbles, l'articulation entre la tourelle et le châssis est limitée en débattement. Une rotation continue à 360° de la tourelle par rapport au châssis n'est donc pas possible, ce qui réduit la polyvalence de la machine.Also, a known type of platform includes a turret that supports the lifting system and is rotatable relative to the frame about a vertical axis of rotation. In this type of nacelle, the heat engine and its reservoir are generally positioned in the turret to limit the height of the frame and improve the stability of the nacelle. In the case where these nacelles are equipped with an electrical drive system, the transmission of power between the turret and the chassis is carried out by electric cables of large section. To avoid damaging these cables, the articulation between the turret and the chassis is limited in movement. 360 ° continuous rotation of the turret relative to the frame is therefore not possible, which reduces the versatility of the machine.

Selon d'autres caractéristiques avantageuses de la nacelle élévatrice selon l'invention, prises isolément ou en combinaison :

  • Chaque essieu parmi le premier essieu et le deuxième essieu est sélectivement moteur ou non moteur en fonction du mode de fonctionnement choisi parmi les différents modes de fonctionnement de l'ensemble d'alimentation en énergie.
  • Parmi les différents modes de fonctionnement, l'ensemble d'alimentation en énergie présente au moins un mode de fonctionnement dans lequel le système de levage est alimenté par le système de pompage, lequel est actionné par la génératrice, laquelle est alimentée par l'unité de batterie, alors que le moteur thermique est arrêté.
  • La tourelle est mobile en rotation à 360 degrés en continu par rapport au châssis autour de l'axe vertical de rotation.
  • Le système de pompage comprend des conduites reliant hydrauliquement la tourelle au châssis en traversant des organes de liaison disposés entre le châssis et la tourelle.
  • Les organes de liaison disposés entre le châssis et la tourelle sont formés par des conduits d'un joint tournant hydraulique formant une interface de liaison entre le châssis et la tourelle.
  • Le système de pompage comprend: une première pompe couplée mécaniquement au moteur thermique ; un moteur hydraulique couplé hydrauliquement à la première pompe ; et une deuxième pompe couplée mécaniquement ou hydrauliquement au moteur hydraulique, notamment de manière débrayable, couplée mécaniquement à la génératrice et couplée hydrauliquement au système d'entraînement hydraulique.
  • La deuxième pompe ou une troisième pompe est couplée hydrauliquement au système de levage.
  • La deuxième pompe ou une troisième pompe est couplée hydrauliquement à un système de direction équipant la nacelle.
According to other advantageous features of the aerial platform according to the invention, taken separately or in combination:
  • Each axle among the first axle and the second axle is selectively motor or non-motor depending on the operating mode selected from the different operating modes of the power supply assembly.
  • Among the different modes of operation, the power supply assembly has at least one mode of operation in which the lifting system is powered by the pumping system, which is powered by the generator, which is powered by the unit. battery, while the engine is stopped.
  • The turret is rotatable 360 degrees continuously relative to the frame about the vertical axis of rotation.
  • The pumping system includes pipes hydraulically connecting the turret to the chassis through connecting members disposed between the frame and the turret.
  • The connecting members disposed between the frame and the turret are formed by conduits of a hydraulic rotary joint forming a connection interface between the frame and the turret.
  • The pumping system comprises: a first pump mechanically coupled to the heat engine; a hydraulic motor hydraulically coupled to the first pump; and a second pump mechanically or hydraulically coupled to the hydraulic motor, in particular disengageable manner, mechanically coupled to the generator and hydraulically coupled to the hydraulic drive system.
  • The second pump or a third pump is hydraulically coupled to the hoisting system.
  • The second pump or a third pump is hydraulically coupled to a steering system fitted to the nacelle.

L'invention a également pour objet un procédé de mise en oeuvre d'une nacelle élévatrice telle que mentionnée ci-dessus. Le procédé est caractérisé en ce qu'il inclut une étape de sélection d'un mode de fonctionnement de la nacelle élévatrice parmi au moins les différents modes de fonctionnement suivants :

  • un mode où le moteur thermique et le système de pompage actionnent la génératrice, de manière à recharger l'unité de batterie, alors que la nacelle élévatrice est stationnaire ;
  • un mode où le moteur thermique et le système de pompage alimentent le système d'entraînement hydraulique et actionnent la génératrice, de manière à déplacer la nacelle élévatrice tout en rechargeant l'unité de batterie ;
  • un mode où le moteur thermique et le système de pompage alimentent le système d'entraînement hydraulique, tandis que l'unité de batterie alimente le système d'entraînement électrique ;
  • un mode où le moteur thermique et le système de pompage alimentent le système de levage, tout en actionnant la génératrice de manière à recharger l'unité de batterie ;
  • un mode où l'unité de batterie alimente la génératrice, qui actionne le système de pompage, qui alimente le système de levage, alors que la nacelle élévatrice est stationnaire.
The invention also relates to a method of implementing a lifting platform as mentioned above. The method is characterized in that it includes a step of selecting an operating mode of the aerial platform from at least the following different operating modes:
  • a mode in which the heat engine and the pumping system operate the generator, so as to recharge the battery unit while the aerial platform is stationary;
  • a mode in which the heat engine and the pumping system power the hydraulic drive system and operate the generator to move the aerial platform while charging the battery unit;
  • a mode where the heat engine and the pumping system feed the hydraulic drive system, while the battery unit powers the electric drive system;
  • a mode in which the engine and the pumping system power the hoist system, while operating the generator to recharge the battery unit;
  • a mode where the battery unit powers the generator, which operates the pumping system, which feeds the lifting system, while the aerial platform is stationary.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple non limitatif et faite en référence aux dessins annexés sur lesquels :

  • la figure 1 est une représentation schématique d'une nacelle élévatrice conforme à l'invention ;
  • la figure 2 est une vue à plus grande échelle du détail II à la figure 1 ;
  • la figure 3 est un tableau illustrant différents modes de fonctionnement de la nacelle des figures 1 et 2 ;
  • la figure 4 est une vue analogue à la figure 2, montrant partiellement une nacelle élévatrice conforme à un deuxième mode de réalisation de l'invention ;
  • la figure 5 est une vue analogue à la figure 1, montrant une nacelle élévatrice conforme à un troisième mode de réalisation de l'invention ;
  • la figure 6 est une vue à plus grande échelle du détail VI à la figure 5 ;
  • la figure 7 est une vue analogue à la figure 1, montrant une nacelle élévatrice conforme à un quatrième mode de réalisation de l'invention ; la figure 8 est une vue à plus grande échelle du détail VIII à la figure 7.
  • la ligne 9 est une coupe d'une interface de liaison entre une tourelle et un châssis de la nacelle élévatrice de la figure 1, montrant des organes de liaison hydraulique.
The invention will be better understood on reading the description which follows, given solely by way of nonlimiting example and with reference to the appended drawings in which:
  • the figure 1 is a schematic representation of an aerial platform according to the invention;
  • the figure 2 is a larger-scale view of detail II to the figure 1 ;
  • the figure 3 is a table illustrating different modes of operation of the nacelle of figures 1 and 2 ;
  • the figure 4 is a view similar to the figure 2 partially showing an aerial platform according to a second embodiment of the invention;
  • the figure 5 is a view similar to the figure 1 showing a lifting platform according to a third embodiment of the invention;
  • the figure 6 is a larger-scale view of detail VI to the figure 5 ;
  • the figure 7 is a view similar to the figure 1 showing a lifting platform according to a fourth embodiment of the invention; the figure 8 is a larger-scale view of detail VIII to the figure 7 .
  • line 9 is a section of a connection interface between a turret and a chassis of the aerial lift of the figure 1 , showing hydraulic connecting members.

Sur les figures 1 et 2 est représentée schématiquement une nacelle élévatrice 1 conforme à l'invention.On the figures 1 and 2 is schematically represented an elevator nacelle 1 according to the invention.

La nacelle 1 comprend un châssis 10 et une tourelle 12 séparés par une interface de liaison 14. Le châssis 10 comporte une base 11, un système de direction 13, un essieu avant 20 et un essieu arrière 30. La tourelle 12 comporte un système de levage 18 et est mobile en rotation autour d'un axe vertical par rapport au châssis 10. De préférence, le châssis 10 présente une faible hauteur, par exemple une hauteur maximale de 1 mètre par rapport au sol.The nacelle 1 comprises a frame 10 and a turret 12 separated by a connecting interface 14. The frame 10 comprises a base 11, a steering system 13, a front axle 20 and a rear axle 30. The turret 12 comprises a system 18 and is movable in rotation about a vertical axis relative to the frame 10. Preferably, the frame 10 has a low height, for example a maximum height of 1 meter from the ground.

Le système de levage 18 inclut un distributeur hydraulique 59 et au moins un vérin hydraulique 19. Sur l'exemple de la figure 1, le système 18 inclut trois vérins 19. Les vérins 19 permettent d'actionner au moins un équipement élévateur, non représenté dans un but de simplification, équipant la nacelle 1. A titre d'exemple, le système de levage 18 permet d'actionner un bras télescopique articulé sur la tourelle 12, avec une plate-forme mobile agencée à l'extrémité du bras télescopique. Dans un mode de réalisation particulier, chaque vérin 19 permet d'actionner un équipement élévateur distinct.The lifting system 18 includes a hydraulic distributor 59 and at least one hydraulic cylinder 19. On the example of the figure 1 , the system 18 includes three jacks 19. The jacks 19 can actuate at least one elevator equipment, not shown for simplification purposes, equipping the nacelle 1. For example, the lifting system 18 can operate a telescopic arm articulated on the turret 12, with a mobile platform arranged at the end of the telescopic arm. In a particular embodiment, each cylinder 19 can actuate a separate elevator equipment.

L'essieu avant 20 comprend une roue avant gauche 21 et une roue avant droite 22, couplées chacune à un moteur hydraulique, respectivement 23 ou 24. L'essieu arrière 30 comprend une roue arrière gauche 31 et une roue arrière droite 32, couplées chacune à un moteur électrique, respectivement 33 ou 34. De préférence, les moteurs électriques 33 et 34 ne sont pas réversibles. Les roues 21, 22, 31 et 32 sont montées pivotantes, chacune autour d'un axe horizontal, par rapport au châssis 10. Les moteurs hydrauliques 23 et 24 forment un système d'entraînement hydraulique 23+24 des roues 21 et 22, tandis que les moteurs électriques 33 et 34 forment un système d'entraînement électrique 33+34 des roues 31 et 32. Sur l'exemple de la figure 1, le système de direction 13 est couplé avec l'essieu avant 20. Autrement dit, l'essieu avant 20 est directeur et les roues avant 21 et 22 sont directrices.The front axle 20 comprises a left front wheel 21 and a front right wheel 22, each coupled to a hydraulic motor, respectively 23 or 24. The rear axle 30 comprises a left rear wheel 31 and a right rear wheel 32, each coupled to an electric motor, respectively 33 or 34. Preferably, the electric motors 33 and 34 are not reversible. The wheels 21, 22, 31 and 32 are pivotally mounted, each about a horizontal axis, relative to the frame 10. The hydraulic motors 23 and 24 form a hydraulic drive system 23 + 24 of the wheels 21 and 22, while that the electric motors 33 and 34 form an electric drive system 33 + 34 of the wheels 31 and 32. In the example of the figure 1 , the steering system 13 is coupled with the front axle 20. In other words, the front axle 20 is steering and the front wheels 21 and 22 are steered.

La nacelle 1 est également équipée d'un ensemble d'alimentation en énergie 40, qui présente différents modes de fonctionnement M1 à M10 illustrés à la figure 3, afin de s'adapter à l'environnement et aux conditions d'utilisation de la nacelle 1. L'ensemble 40 est configuré pour alimenter sélectivement en énergie le système de direction 13, le système de levage 18, les moteurs hydrauliques 23 et 24 et les moteurs électriques 33 et 34. La nacelle 1 est équipée d'un système de commande, non représenté dans un but de simplification, permettant de choisir un mode de fonctionnement de l'ensemble 40 parmi les modes de fonctionnement M1 à M10.The nacelle 1 is also equipped with a power supply assembly 40, which has different operating modes M1 to M10 illustrated in FIG. figure 3 in order to adapt to the environment and the conditions of use of the nacelle 1. The assembly 40 is configured to selectively supply power to the steering system 13, the hoisting system 18, the hydraulic motors 23 and 24 and the electric motors 33 and 34. The nacelle 1 is equipped with a control system, not shown for purposes of simplification, for selecting an operating mode of the set 40 among the operating modes M1 to M10.

L'ensemble d'alimentation en énergie 40 comprend un moteur thermique 41, un système de pompage 50 et un système électrique 60, incluant une génératrice 61 et une unité de batterie 62. L'ensemble 40 permet de transmettre de fortes puissances à travers la liaison 14 entre le châssis 10 et la tourelle 12, en particulier du moteur thermique 41 à l'unité de batterie 62. Les éléments constitutifs de l'ensemble 40 sont positionnés de manière à optimiser la stabilité de la nacelle 1, comme détaillé ci-après.The power supply assembly 40 comprises a heat engine 41, a pumping system 50 and an electrical system 60, including a generator 61 and a battery unit 62. The assembly 40 makes it possible to transmit high power through the generator. connection 14 between the frame 10 and the turret 12, in particular the heat engine 41 to the battery unit 62. The components of the assembly 40 are positioned so as to optimize the stability of the nacelle 1, as detailed below.

Le moteur thermique 41 est un moteur à combustion interne. Le moteur 41 et son réservoir de carburant, non représenté dans un but de simplification, sont montés sur la tourelle 12. Avantageusement, le moteur 41 peut être monté sur la tourelle 12 à l'opposé du système de levage 18, par rapport à l'axe de rotation de la tourelle 12 sur le châssis 10, de manière à optimiser la stabilité de la nacelle 1. Ainsi, le moteur 41 est constamment disposé en contrepoids de la structure élévatrice, quelle que soit la position angulaire de la tourelle 12. Le moteur 41 est couplé au système de pompage 50, comme détaillé ci-après. Le moteur 41 permet à la nacelle 1 de disposer d'autonomie et de puissance en usage tout-terrain, sans réduire la réserve d'énergie électrique de l'unité de batterie 62. Egalement, le moteur 41 permet d'assurer le fonctionnement de la nacelle 1 lorsque qu'aucune source de recharge électrique n'est disponible pour recharger l'unité de batterie 62.The heat engine 41 is an internal combustion engine. The engine 41 and its fuel tank, not shown for simplification purposes, are mounted on the turret 12. Advantageously, the engine 41 can be mounted on the turret 12 opposite the lifting system 18, with respect to the the axis of rotation of the turret 12 on the frame 10, so as to optimize the stability of the platform 1. Thus, the motor 41 is constantly arranged as a counterweight to the lifting structure, regardless of the angular position of the turret 12. The motor 41 is coupled to the pumping system 50, as detailed below. The engine 41 allows the nacelle 1 to have autonomy and power in off-road use, without reducing the reserve of electrical energy of the battery unit 62. Also, the motor 41 ensures the operation of nacelle 1 when no electric recharge source is available to recharge the battery unit 62.

Le système de pompage 50 comprend une première pompe 52 monté sur la tourelle 12, ainsi qu'un moteur hydraulique 53 et une deuxième pompe 54 montés sur le châssis 10. Les pompes 52 et 54 sont des pompes à cylindrée variable. En fonction du mode de fonctionnement de l'ensemble 40, le dispositif de pompage 50 peut alimenter les moteurs hydrauliques 23 et 24 pour entraîner les roues 21 et 22. Egalement, le dispositif de pompage 50 peut actionner le système de direction 13 et/ou le système de levage 18.The pumping system 50 includes a first pump 52 mounted on the turret 12, as well as a hydraulic motor 53 and a second pump 54 mounted on the frame 10. The pumps 52 and 54 are variable displacement pumps. Depending on the operating mode of the assembly 40, the pumping device 50 can feed the hydraulic motors 23 and 24 to drive the wheels 21 and 22. Also, the pumping device 50 can actuate the steering system 13 and / or lifting system 18.

La pompe 52 est couplée mécaniquement au moteur thermique 41, de sorte que le moteur 41 peut entraîner la pompe 52. Le moteur hydraulique 53 est couplé hydrauliquement à la pompe 52 via des conduites 73 et 74, de sorte que la pompe 52 peut entraîner le moteur 53. La pompe 52, le moteur 54 et les conduites 73 et 74 forment un circuit hydraulique fermé, indépendant des autres circuits hydrauliques équipant la nacelle 1.The pump 52 is mechanically coupled to the heat engine 41, so that the motor 41 can drive the pump 52. The hydraulic motor 53 is hydraulically coupled to the pump 52 via lines 73 and 74, so that the pump 52 can drive the pump. motor 53. The pump 52, the motor 54 and the ducts 73 and 74 form a closed hydraulic circuit, independent of the other hydraulic circuits equipping the platform 1.

Le moteur hydraulique 53 est à cylindrée fixe. Le moteur hydraulique 53 est couplé mécaniquement à la pompe 54 via un dispositif de couplage mécanique 98, de sorte que le moteur 53 peut entraîner la pompe 54. Le dispositif de couplage mécanique 98 entre le moteur 53 et la pompe 54 comprend par exemple un embrayage ou un mécanisme de roue libre. Ainsi, le moteur 53 et la pompe 54 peuvent être sélectivement accouplés ou découplés mécaniquement.The hydraulic motor 53 is fixed displacement. The hydraulic motor 53 is mechanically coupled to the pump 54 via a mechanical coupling device 98, so that the motor 53 can drive the pump 54. The mechanical coupling device 98 between the motor 53 and the pump 54 comprises for example a clutch or a freewheel mechanism. Thus, the motor 53 and the pump 54 can be selectively coupled or decoupled mechanically.

La pompe 54 est reliée à un réservoir hydraulique 56 via une conduite 78. La pompe 54 fonctionne en circuit ouvert. La pompe 54 est reliée hydrauliquement à un bloc répartiteur 57 via des conduites 71 et 72. Le bloc répartiteur 57 est relié hydrauliquement à un bloc distributeur 58 via des conduites 81 et 82. Le bloc répartiteur 57 est relié hydrauliquement au système de direction 13 via des conduites 91 et 92. Le bloc répartiteur 57 est relié hydrauliquement à un bloc distributeur 59 via des conduites 93 et 94. Le bloc distributeur 58 est relié hydrauliquement au moteur hydraulique 23 via des conduites 83 et 84 et au moteur hydraulique 24 via des conduites 85 et 86. Le bloc distributeur 59 est relié hydrauliquement aux vérins 19. Ainsi, la pompe 54 est couplée hydrauliquement au système de direction 13, au système de levage 18 et aux moteurs hydrauliques 23 et 24.The pump 54 is connected to a hydraulic reservoir 56 via a pipe 78. The pump 54 operates in an open circuit. The pump 54 is hydraulically connected to a distribution block 57 via lines 71 and 72. The distribution block 57 is hydraulically connected to a distributor block 58 via lines 81 and 82. The distribution block 57 is connected hydraulically to the steering system 13 via lines 91 and 92. The distributor block 57 is hydraulically connected to a distributor block 59 via lines 93 and 94. The distributor block 58 is hydraulically connected to the hydraulic motor 23 via lines 83 and 84 and to the hydraulic motor 24 via lines 85 and 86. The distributor block 59 is hydraulically connected to the cylinders 19. Thus, the pump 54 is hydraulically coupled to the steering system 13, the lifting system 18 and the hydraulic motors 23 and 24.

Le système de pompage 50 est en partie monté sur le châssis 10 et en partie monté sur la tourelle 12. Pour permettre la rotation de la tourelle 12 par rapport au châssis à 360 degrés en continu, les conduites 73, 74, 93 et 94 relient hydrauliquement la tourelle 12 au châssis 10 en traversant des organes de liaison 75, 76, 95 et 96 disposés entre le châssis 10 et la tourelle 12.The pumping system 50 is partly mounted on the frame 10 and partly mounted on the turret 12. To enable rotation of the turret 12 relative to the frame 360 degrees continuously, the lines 73, 74, 93 and 94 connect hydraulically the turret 12 to the frame 10 through connecting members 75, 76, 95 and 96 disposed between the frame 10 and the turret 12.

Les organes de liaison 75, 76, 95, 96 disposés entre le châssis 10 et la tourelle 12 sont formés chacun par un conduit d'un joint tournant hydraulique qui forme l'interface de liaison 14. Ce joint tournant hydraulique est représenté plus précisément à la figure 9. L'interface de liaison 14 comprend un cylindre creux 141 fixe par rapport au châssis 10 et un arbre central 142 solidaire en rotation de la tourelle 12 et monté pivotant dans le cylindre creux 141 selon l'axe de rotation de la tourelle 12. Chacun des conduits comprend un port de connexion 143 traversant la paroi du cylindre 141, un port de connexion 144 ménagé dans l'arbre central 142, prolongé par un conduit axial 145 comprenant un débouché radial 146 sur une surface externe de l'arbre central 142, et une rainure 147 ménagée sur la surface interne du cylindre creux 141 dans l'alignement radial du port de connexion 143 du cylindre creux 141 et du débouché 147. Chaque conduit permet, grâce à la rainure périphérique, le passage permanent du fluide hydraulique quel que soit l'angle d'orientation de la tourelle 12 par rapport au châssis 10. Un seul des ports de connexion 144 de l'arbre central 142 est visible sur la figure 9, les autres ports de connexion étant décalés angulairement. Plusieurs autres ports de connexion 148 du cylindre creux 141 et leur rainure associée 149 sont visibles, décalés axialement par rapport au port de connexion 143. Chacun des conduits du joint tournant hydraulique définit un chemin fluidique indépendant grâce au décalage angulaire des ports 144 de l'arbre central 142 et au décalage axial des ports 143 et 148 du cylindre creux 141.The connecting members 75, 76, 95, 96 disposed between the frame 10 and the turret 12 are each formed by a duct of a hydraulic rotary joint which forms the connecting interface 14. This hydraulic rotary joint is shown more precisely at the figure 9 . The connection interface 14 comprises a hollow cylinder 141 fixed with respect to the frame 10 and a central shaft 142 integral in rotation with the turret 12 and pivotally mounted in the hollow cylinder 141 along the axis of rotation of the turret 12. conduits comprises a connection port 143 passing through the wall of the cylinder 141, a connection port 144 formed in the central shaft 142, extended by an axial conduit 145 comprising a radial outlet 146 on an outer surface of the central shaft 142, and a groove 147 formed on the inner surface of the hollow cylinder 141 in the radial alignment of the connection port 143 of the hollow cylinder 141 and the outlet 147. Each conduit allows, thanks to the peripheral groove, the permanent passage of the hydraulic fluid whatever the angle of orientation of the turret 12 relative to the frame 10. Only one of the connection ports 144 of the central shaft 142 is visible on the figure 9 , the other connection ports being angularly offset. Several other connection ports 148 of the hollow cylinder 141 and their associated groove 149 are visible, offset axially with respect to the connection port 143. Each of the ducts of the hydraulic rotary joint defines an independent fluid path by virtue of the angular offset of the ports 144 of the central shaft 142 and the axial offset of the ports 143 and 148 of the hollow cylinder 141.

Le système électrique 60 permet d'assurer le fonctionnement complet de la nacelle 1 en intérieur, en évitant d'utiliser le moteur thermique 41 et avec une autonomie importante. En particulier, le système électrique 60 permet de déplacer la nacelle 1 avec l'essieu 30 qui est moteur et d'actionner le système de levage 18, simultanément ou séparément, sans utiliser le moteur thermique 41. Le système électrique 60 est monté sur le châssis 10.The electrical system 60 ensures full operation of the nacelle 1 indoors, avoiding the use of the engine 41 and with a significant autonomy. In particular, the electrical system 60 makes it possible to move the platform 1 with the axle 30 which is driving and to actuate the lifting system 18 simultaneously or separately, without using the heat engine 41. The electrical system 60 is mounted on the chassis 10.

Le système électrique 60 comprend la génératrice 61, l'unité de batterie 62, un dispositif 63 de raccord électrique de l'unité de batterie 62 au secteur, ainsi qu'un bloc variateur 64 incluant des variateurs électriques. Le dispositif 63 permet de recharger l'unité de batterie 62. Sur l'exemple de la figure 1, le dispositif 63 comprend une prise électrique. Le système électrique 60 comprend également des câbles électriques 65, 66, 67 et 68. La génératrice 61 est connectée électriquement au bloc variateur 64 via les câbles 65. L'unité de batterie 62 est connectée électriquement au bloc variateur 64 via les câbles 66. Le moteur électrique 33 est connecté électriquement au bloc variateur 64 via les câbles 67. Le moteur électrique 34 est connecté électriquement au bloc variateur 64 via les câbles 68.The electrical system 60 includes the generator 61, the battery unit 62, a device 63 for electrically connecting the battery unit 62 to the mains, and a dimmer unit 64 including electric dimmers. The device 63 makes it possible to recharge the battery unit 62. On the example of the figure 1 , the device 63 comprises an electrical socket. The electrical system 60 also includes electrical cables 65, 66, 67 and 68. The generator 61 is electrically connected to the drive block 64 via the cables 65. The battery unit 62 is electrically connected to the drive unit 64 via the cables 66. The electric motor 33 is electrically connected to the drive block 64 via the cables 67. The electric motor 34 is electrically connected to the drive block 64 via the cables 68.

La génératrice 61 est un moteur électrique couplé à la pompe 54 et à l'unité de batterie 62. La génératrice 61 a une puissance suffisante pour actionner le système de levage 18 ou la recharge d'unité de batterie 62, c'est à dire de l'ordre de 3 à 15 kW. La génératrice 61 est distincte des moteurs électriques 33 et 34. La génératrice 61 est couplée mécaniquement à la pompe 54 via un dispositif de couplage mécanique 97. En fonction du mode de fonctionnement de l'ensemble 40, la génératrice 61 peut entraîner la pompe 54 découplée du moteur 53, ou bien la pompe 54 accouplée au moteur 53 peut entraîner la génératrice 61.The generator 61 is an electric motor coupled to the pump 54 and the battery unit 62. The generator 61 has sufficient power to operate the hoist system 18 or the battery unit recharge 62, i.e. of the order of 3 to 15 kW. The generator 61 is distinct from the electric motors 33 and 34. The generator 61 is mechanically coupled to the pump 54 via a mechanical coupling device 97. Depending on the operating mode of the assembly 40, the generator 61 can drive the pump 54 uncoupled from the motor 53, or the pump 54 coupled to the motor 53 can drive the generator 61.

L'unité de batterie 62 comprend une ou plusieurs batteries. Sur l'exemple de la figure 1, l'unité de batterie 62 comprend une batterie de forte de puissance, c'est-à-dire une puissance de l'ordre de 200 à 600 Ah. En fonction du mode de fonctionnement de l'ensemble 40, l'unité de batterie 62 peut alimenter la génératrice 61 pour entraîner la pompe 54, ou bien la génératrice 61 entraînée par la pompe 54 peut recharger l'unité de batterie 62. En alternative, l'unité de batterie 62 peut être rechargée en branchant la prise 63 sur le secteur. Egalement, l'unité de batterie 62 peut alimenter les moteurs électriques 33 et 34 pour entraîner les roues 31 et 32.The battery unit 62 includes one or more batteries. On the example of the figure 1 , the battery unit 62 comprises a high power battery, that is to say a power of the order of 200 to 600 Ah. Depending on the operating mode of the assembly 40, the battery unit 62 may power the generator 61 to drive the pump 54, or the generator 61 driven by the pump 54 can recharge the battery unit 62. As an alternative , the battery unit 62 can be recharged by connecting the plug 63 to the mains. Also, the battery unit 62 can power the electric motors 33 and 34 to drive the wheels 31 and 32.

Les différents modes de fonctionnement M1 à M10 de la nacelle 1 et de l'ensemble 40 sont décrits ci-après en référence au tableau de la figure 3.The different operating modes M1 to M10 of the nacelle 1 and the assembly 40 are described below with reference to the table of the figure 3 .

Ces modes de fonctionnement comprennent un mode M1 utilisé indifféremment en extérieur ou en intérieur, des modes M2 à M7 utilisés de préférence en extérieur, ainsi que des modes M8 à M10 utilisés de préférence en intérieur. Le terme « extérieur» signifie en dehors d'un bâtiment, par exemple sur une route ou sur tout terrain, tandis que le terme « intérieur » signifie dans un bâtiment, par exemple dans un atelier, un entrepôt ou un hangar.These modes of operation comprise a mode M1 used indifferently outside or inside, modes M2 to M7 used preferably outdoors, and modes M8 to M10 used preferably indoors. The term "outside" means outside a building, for example on a road or on any land, while the term "inside" means in a building, for example in a workshop, warehouse or hangar.

Dans les modes M1 et M8 à M10, le moteur thermique 41 est à l'arrêt. Les modes M8 à M10 peuvent également être utilisés en extérieur.In modes M1 and M8 to M10, the heat engine 41 is at a standstill. Modes M8 to M10 can also be used outdoors.

Dans les modes M2 à M7, le moteur thermique 41 est en marche. Les modes M2 à M7 ne sont pas utilisés en intérieur afin d'éviter l'utilisation du moteur thermique 41 en intérieur, bien que ce soit techniquement possible.In modes M2 to M7, the heat engine 41 is running. Modes M2 to M7 are not used indoors to avoid the use of the heat engine 41 indoors, although it is technically possible.

Dans les modes M1, M2, M6 et M9, la nacelle 1 est stationnaire. Les essieux 20 et 30 sont non moteurs.In modes M1, M2, M6 and M9, platform 1 is stationary. The axles 20 and 30 are non-motor.

Dans les modes M3, M4, M5, M7, M8 et M10, la nacelle 1 est mobile en translation au sol. Dans les modes M3, M4 et M7, l'essieu 20 est moteur tandis que l'essieu 30 est non moteur. Dans les modes M8 et M10, l'essieu 20 est non moteur tandis que l'essieu 30 est moteur. Dans le mode M5, les essieux 20 et 30 sont tous les deux moteurs. Autrement dit, en fonction du mode de fonctionnement de l'ensemble 40, la nacelle 1 est propulsée en translation au sol soit par le système d'entraînement hydraulique 23+24, soit par le système d'entraînement électrique 33+34, soit simultanément par le système d'entraînement hydraulique 23+24 et par le système d'entraînement électrique 33+34.In the modes M3, M4, M5, M7, M8 and M10, the nacelle 1 is mobile in translation to the ground. In modes M3, M4 and M7, the axle 20 is motor while the axle 30 is non-motor. In modes M8 and M10, the axle 20 is non-motor while the axle 30 is motor. In the M5 mode, the axles 20 and 30 are both engines. In other words, depending on the operating mode of the assembly 40, the nacelle 1 is propelled in translation on the ground either by the hydraulic drive system 23 + 24, or by the electric drive system 33 + 34, or simultaneously by the hydraulic drive system 23 + 24 and the electric drive system 33 + 34.

Dans le mode M1 dénommé « mode recharge par secteur », le dispositif 63 est branché au secteur électrique de manière à recharger l'unité de batterie 62. Le moteur 41, le système de pompage 50 et la génératrice 61 sont à l'arrêt.In the M1 mode referred to as "mains charging mode", the device 63 is connected to the mains power supply so as to recharge the battery unit 62. The motor 41, the pumping system 50 and the generator 61 are at a standstill.

Dans les modes M2, M3, M5, M6 et M7, le moteur thermique 41 actionne la pompe 52 présentant une cylindrée C1, de manière à faire tourner le moteur 53 à une vitesse N1. Le moteur 53 entraîne la pompe 54 et à la génératrice 61 via les dispositifs de couplage mécanique 97 et 98. Alternativement, la cylindrée de la pompe 52 et la vitesse du moteur 53 pourraient être différentes pour chaque mode de fonctionnement.In the modes M2, M3, M5, M6 and M7, the heat engine 41 actuates the pump 52 having a cylinder C1, so as to rotate the motor 53 at a speed N1. The motor 53 drives the pump 54 and the generator 61 via the mechanical coupling devices 97 and 98. Alternatively, the displacement of the pump 52 and the speed of the motor 53 could be different for each operating mode.

Dans le mode M2 dénommé « mode recharge par génératrice », la pompe 54 est réglée avec une cylindrée nulle. Ainsi, le moteur 53 entraîne la génératrice 61, qui produit du courant électrique permettant de recharger l'unité de batterie 62.In the M2 mode called "generator charging mode", the pump 54 is set with a zero displacement. Thus, the motor 53 drives the generator 61, which produces electric current for recharging the battery unit 62.

Dans le mode M3 dénommé « mode translation simple extérieur », la pompe 54 est réglée avec une cylindrée non nulle et alimente les moteurs hydrauliques 23 et 24 pour déplacer la nacelle 1. Si besoin, la pompe 54 alimente également le système de direction 13 pour orienter les roues directrices 21 et 22 et ainsi diriger la nacelle 1. Dans le même temps, la génératrice 61 produit du courant électrique permettant de recharger l'unité de batterie 62.In the mode M3 called "simple external translation mode", the pump 54 is set with a non-zero displacement and feeds the hydraulic motors 23 and 24 to move the platform 1. If necessary, the pump 54 also feeds the steering system 13 to orienting the steered wheels 21 and 22 and thus steer the platform 1. At the same time, the generator 61 generates electric current for recharging the battery unit 62.

Dans le mode M4 dénommé «mode translation grande vitesse extérieur », le moteur thermique 41 actionne la pompe 52 présentant une cylindrée C2 différente de la cylindrée C1, de manière à faire tourner le moteur 53 à une vitesse N2 supérieur à la vitesse N1. Le moteur 53 entraîne la pompe 54 et à la génératrice 61 via les dispositifs de couplage mécanique 97 et 98. La pompe 54 présente une cylindrée maximale et la génératrice 61 est en rotation libre. La pompe 54 alimente les moteurs hydrauliques 23 et 24 pour déplacer la nacelle 1 à une vitesse supérieure à la vitesse du mode M3. Si besoin, la pompe 54 alimente également le système de direction 13 pour orienter les roues directrices 21 et 22 et ainsi diriger la nacelle 1. Dans le même temps, l'unité de batterie 62 n'est ni en charge ni en décharge.In the mode M4 called "external high speed translation mode", the heat engine 41 actuates the pump 52 having a displacement C2 different from the displacement C1, so as to turn the motor 53 at a speed N2 greater than the speed N1. The motor 53 drives the pump 54 and the generator 61 via the devices of mechanical coupling 97 and 98. The pump 54 has a maximum displacement and the generator 61 is in free rotation. The pump 54 supplies the hydraulic motors 23 and 24 to move the platform 1 at a speed greater than the speed of the M3 mode. If necessary, the pump 54 also feeds the steering system 13 to orient the steering wheels 21 and 22 and thus direct the platform 1. At the same time, the battery unit 62 is neither charging nor discharging.

Dans le mode M5 dénommé « mode translation puissance maximale extérieur », la pompe 54 est réglée avec une cylindrée non nulle et la génératrice 61 est en rotation libre. La pompe 54 alimente les moteurs hydrauliques 23 et 24, tandis que l'unité de batterie 62 alimente les moteurs électriques 33 et 34, pour déplacer la nacelle 1. Si besoin, la pompe 54 alimente également le système de direction 13 pour orienter les roues directrices 21 et 22 et ainsi diriger la nacelle 1.In the M5 mode called "maximum external power translation mode", the pump 54 is set with a non-zero displacement and the generator 61 is in free rotation. The pump 54 supplies the hydraulic motors 23 and 24, while the battery unit 62 supplies the electric motors 33 and 34 to move the platform 1. If necessary, the pump 54 also supplies the steering system 13 to orient the wheels 21 and 22 and thus to control the pod 1.

Dans le mode M6 dénommé « mode levage en extérieur », la pompe 54 est réglée avec une cylindrée non nulle et alimente le système de levage 18. La génératrice 61 produit du courant électrique permettant de recharger l'unité de batterie 62.In the mode M6 called "external lifting mode", the pump 54 is set with a non-zero displacement and feeds the lifting system 18. The generator 61 produces electric current for recharging the battery unit 62.

En pratique, il est techniquement possible de combiner les modes M4 et M6 ou bien les modes M5 et M6. Toutefois, pour des raisons de sécurité et d'économie d'énergie, il est préférable de combiner les modes M3 et M6, ce qui correspond au mode M7. Les modes M3 à M6 sont généralement utilisés de préférence au mode M7.In practice, it is technically possible to combine modes M4 and M6 or modes M5 and M6. However, for safety and energy saving reasons, it is best to combine the M3 and M6 modes, which corresponds to the M7 mode. Modes M3 to M6 are generally used in preference to M7 mode.

Dans le mode M7 dénommé « mode translation et levage extérieur », la pompe 54 est réglée avec une cylindrée non nulle et la génératrice 61 est en rotation libre. La pompe 54 alimente à la fois les moteurs hydrauliques 23 et 24 et le système de levage 18. Si besoin, la pompe 54 alimente également le système de direction 13 pour orienter les roues directrices 21 et 22 et ainsi diriger la nacelle 1. Dans le même temps, l'unité de batterie 62 n'est ni en charge ni en décharge.In the M7 mode called "translation mode and external lifting", the pump 54 is set with a non-zero displacement and the generator 61 is in free rotation. The pump 54 supplies both the hydraulic motors 23 and 24 and the lifting system 18. If necessary, the pump 54 also feeds the steering system 13 to orient the steering wheels 21 and 22 and thus to direct the platform 1. In the At the same time, the battery unit 62 is neither charging nor discharging.

Dans le mode M8 dénommé « mode translation simple intérieur », l'unité de batterie 62 alimente les moteurs électriques 33 et 34, pour déplacer la nacelle 1. Si besoin, l'unité de batterie 62 alimente également la génératrice 61, qui actionne la pompe 54, qui alimente le système de direction 13 pour orienter les roues directrices 21 et 22 et ainsi diriger la nacelle 1.In the M8 mode known as "interior single translation mode", the battery unit 62 supplies the electric motors 33 and 34, to move the platform 1. If necessary, the battery unit 62 also supplies the generator 61, which actuates the pump 54, which feeds the steering system 13 to orient the steering wheels 21 and 22 and thus direct the nacelle 1.

Dans le mode M9 dénommé « mode levage en intérieur », l'unité de batterie 62 alimente la génératrice 61, laquelle actionne la pompe 54, laquelle alimente le système de levage 18.In the mode M9 called "indoor lifting mode", the battery unit 62 supplies the generator 61, which actuates the pump 54, which supplies the lifting system 18.

Dans le mode M10 dénommé « mode translation et levage intérieur », l'unité de batterie 62 alimente à la fois les moteurs électriques 33 et 34 et la génératrice 61. La génératrice 61 actionne la pompe 54, qui alimente le système de levage 18 et, si besoin, le système de direction 13.In the M10 mode called "translation mode and internal lifting", the battery unit 62 supplies both the electric motors 33 and 34 and the generator 61. Generator 61 actuates the pump 54, which feeds the lifting system 18 and, if necessary, the steering system 13.

De manière avantageuse dans les modes M9 et M10, le système de levage 18 est alimenté par le système de pompage 50, lequel est actionné par la génératrice 61, laquelle est alimentée par l'unité de batterie 62, alors que le moteur thermique 41 est arrêté.Advantageously in the modes M9 and M10, the lifting system 18 is powered by the pumping system 50, which is actuated by the generator 61, which is powered by the battery unit 62, while the heat engine 41 is stopped.

Sur les figures 4 à 8 sont représentées différentes variantes de nacelle élévatrice 1 conformes à l'invention. Dans les modes de réalisation décrits ci-après, certains éléments constitutifs de la nacelle élévatrice 1 sont comparables à ceux du premier mode de réalisation décrit plus haut et, dans un but de simplification, portent les mêmes références numériques. Seuls les éléments constitutifs présentant des différences avec le premier mode de réalisation portent de nouvelles références numériques. En particulier, les ensembles 140, 240 et 340 présentent certaines différences avec l'ensemble 40. Excepté les différences ci-après, le fonctionnement de la nacelle 1 est globalement comparable dans les différents modes de réalisation.On the Figures 4 to 8 are represented different variants of aerial platform 1 according to the invention. In the embodiments described below, certain constituent elements of the aerial platform 1 are comparable to those of the first embodiment described above and, for the sake of simplification, bear the same numerical references. Only the constituent elements having differences with the first embodiment carry new numerical references. In particular, the assemblies 140, 240 and 340 have certain differences with the assembly 40. Except for the differences hereafter, the operation of the nacelle 1 is globally comparable in the different embodiments.

Le mode de réalisation de la figure 4 présente un dispositif de couplage hydraulique 198 pouvant se substituer au dispositif de couplage mécanique 98 entre le moteur 53 et la pompe 54. L'ensemble 140 comprend un système de pompage 150 incluant un moteur hydraulique 153 à cylindrée variable, entre une cylindrée de valeur nulle et une cylindrée maximale. La génératrice 61 et le moteur 153 sont couplés via le dispositif de couplage mécanique 97. Le moteur 153 et la pompe 54 sont couplés via le dispositif de couplage hydraulique 198. Dans les modes M2, M3 et M5 à M7, le moteur 153 présente une cylindrée C11, tandis que dans le mode M4, le moteur 153 présente une cylindrée C12 inférieure à C11.The embodiment of the figure 4 has a hydraulic coupling device 198 can be substituted for the mechanical coupling device 98 between the motor 53 and the pump 54. The assembly 140 comprises a pumping system 150 including a hydraulic motor 153 with variable displacement, between a displacement of zero value and a maximum displacement. The generator 61 and the motor 153 are coupled via the mechanical coupling device 97. The motor 153 and the pump 54 are coupled via the hydraulic coupling device 198. In the modes M2, M3 and M5 to M7, the motor 153 has a cylinder C11, while in the M4 mode, the engine 153 has a cylinder capacity C12 less than C11.

Le mode de réalisation des figures 5 et 6 présente une pompe 255 supplémentaire pouvant se substituer au bloc répartiteur 57. L'ensemble 240 comprend un système de pompage 250 incluant la première pompe 52, le moteur 53, une deuxième pompe 254 et une troisième pompe 255. La génératrice 61 et la pompe 255 sont couplées via le dispositif de couplage mécanique 97. Le moteur 53 et la pompe 254 sont couplés via le dispositif de couplage mécanique 298, comprenant par exemple un embrayage ou un mécanisme de roue libre. Les pompes 254 et 255 sont couplées via un dispositif de couplage hydraulique 299 et reliées au réservoir 56 via des conduites 78 et 279, respectivement. Les pompes 254 et 255 fonctionnent en circuit ouvert. La pompe 255 est indirectement couplée au moteur 53. La pompe 254 et le réservoir 56 sont reliés au bloc distributeur 58 via des conduites 281 et 282. En plus des moteurs 23 et 24, le bloc distributeur 58 est relié au système de direction 13 via des conduites 291 et 292. La pompe 255 et le réservoir 56 sont reliés au bloc distributeur 59 du système de levage 18 via des conduites 293 et 294.The embodiment of the figures 5 and 6 presents an additional pump 255 which can be substituted for the distribution block 57. The assembly 240 comprises a pumping system 250 including the first pump 52, the motor 53, a second pump 254 and a third pump 255. The generator 61 and the pump 255 are coupled via the mechanical coupling device 97. The motor 53 and the pump 254 are coupled via the mechanical coupling device 298, including for example a clutch or free wheel mechanism. The pumps 254 and 255 are coupled via a hydraulic coupling device 299 and connected to the reservoir 56 via lines 78 and 279, respectively. Pumps 254 and 255 operate in open circuit. The pump 255 is indirectly coupled to the motor 53. The pump 254 and the reservoir 56 are connected to the distributor block 58 via lines 281 and 282. In addition to the motors 23 and 24, the distributor block 58 is connected to the steering system 13 via pipes 291 and 292. The pump 255 and the reservoir 56 are connected to the distributor block 59 of the lifting system 18 via lines 293 and 294.

La pompe 254 a une cylindrée non nulle dans les modes M3, M4, M5 et M7 pour alimenter le système d'entraînement hydraulique 23+24 et le système de direction 13, avec une cylindrée maximale dans le mode M4 ; une cylindrée non nulle dans les modes M8 et M10 pour alimenter le système de direction 13 ; et une cylindrée nulle dans les autres modes de fonctionnement. La pompe 255 a une cylindrée non nulle dans les modes M6, M7, M9 et M10 afin d'alimenter le système de levage 18 ; et une cylindrée nulle dans les autres modes de fonctionnement.The pump 254 has a non-zero displacement in the modes M3, M4, M5 and M7 for supplying the hydraulic drive system 23 + 24 and the steering system 13 with a maximum displacement in the mode M4; a non-zero displacement in modes M8 and M10 for supplying the steering system 13; and a zero displacement in the other modes of operation. The pump 255 has a non-zero displacement in modes M6, M7, M9 and M10 to supply the lifting system 18; and a zero displacement in the other modes of operation.

Le mode de réalisation des figures 7 et 8 présente un système d'entraînement hydraulique alternatif en boucle fermée, également connu sous le terme transmission hydrostatique, incluant la pompe 354. L'ensemble 340 comprend un système de pompage 350 incluant la première pompe 52, le moteur 53, une deuxième pompe 354 et une troisième pompe 355. La génératrice 61 et la pompe 355 sont couplées via le dispositif de couplage mécanique 97. Le moteur 53 et la pompe 354 sont couplés via le dispositif de couplage mécanique 398, comprenant par exemple un embrayage ou un mécanisme de roue libre. Les pompes 354 et 355 sont couplées via le dispositif de couplage hydraulique 399. La pompe 355 est reliée au réservoir 56 via une conduite 379. La pompe 354 fonctionne en circuit fermé, tandis que la pompe 355 fonctionne en circuit ouvert. La pompe 355 est indirectement couplée au moteur 53. La pompe 354 est reliée au bloc distributeur 58 via des conduites 381 et 382. La pompe 355 et le réservoir 56 sont reliés au bloc répartiteur 357 via des conduites 371 et 372. La pompe 355 et le réservoir 56 sont reliés au bloc distributeur 59 du système de levage 18 via ces mêmes conduites 371 et 372 et via des conduites 393 et 394 qui sont directement connectées aux conduites 371 et 372, en amont du bloc répartiteur 357. Le bloc répartiteur 357 est relié au système de direction 13 via les conduites 91 et 92.The embodiment of the figures 7 and 8 discloses a closed-loop reciprocating hydraulic drive system, also known as a hydrostatic transmission, including the pump 354. The assembly 340 includes a pumping system 350 including the first pump 52, the motor 53, a second pump 354, and a third pump 355. The generator 61 and the pump 355 are coupled via the mechanical coupling device 97. The motor 53 and the pump 354 are coupled via the mechanical coupling device 398, comprising for example a clutch or a freewheeling mechanism . The pumps 354 and 355 are coupled via the hydraulic coupling device 399. The pump 355 is connected to the reservoir 56 via a line 379. The pump 354 operates in a closed circuit, while the pump 355 operates in an open circuit. The pump 355 is indirectly coupled to the motor 53. The pump 354 is connected to the distributor block 58 via lines 381 and 382. The pump 355 and the reservoir 56 are connected to the distributor block 357 via lines 371 and 372. The pump 355 and the tank 56 are connected to the distributor block 59 of the lifting system 18 via these same lines 371 and 372 and via lines 393 and 394 which are directly connected to the lines 371 and 372, upstream of the distributor block 357. The distributor block 357 is connected to the steering system 13 via lines 91 and 92.

La pompe 354 a une cylindrée non nulle dans les modes M3, M4, M5 et M7 pour alimenter le système d'entraînement hydraulique 23+24, avec une cylindrée maximale dans le mode M4 ; une cylindrée non nulle dans les modes M8 et M10 pour alimenter le système de direction 13 ; et une cylindrée nulle dans les autres modes. La pompe 255 a une cylindrée non nulle dans les modes M3, M4, M5 et M8 afin d'alimenter le système de direction 13 ; une cylindrée non nulle dans les modes M6 et M9 afin d'alimenter le système de levage 18 ; une cylindrée non nulle dans les modes M7 et M10 afin d'alimenter le système de direction 13 et le système de levage 18 ; et une cylindrée nulle dans les autres modes de fonctionnement.The pump 354 has a non-zero displacement in modes M3, M4, M5 and M7 for supplying the hydraulic drive system 23 + 24, with a maximum displacement in the mode M4; a non-zero displacement in modes M8 and M10 for supplying the steering system 13; and zero cubic capacity in the other modes. The pump 255 has a non-zero displacement in the modes M3, M4, M5 and M8 in order to supply the steering system 13; a non-zero displacement in modes M6 and M9 to supply the lifting system 18; a non-zero displacement in modes M7 and M10 to supply the steering system 13 and the lifting system 18; and a zero displacement in the other modes of operation.

Par ailleurs, la nacelle 1 peut être conformée différemment des figures 1 à 9 sans sortir du cadre de l'invention. En outre, les caractéristiques techniques des différents modes de réalisation et variantes mentionnés ci-dessus peuvent être, en totalité ou pour certaines d'entre elles, combinées entre elles. Ainsi, la nacelle élévatrice 1 peut être adaptée en termes de coût, d'ergonomie et de performance.In addition, the pod 1 may be shaped differently from the Figures 1 to 9 without departing from the scope of the invention. In addition, the technical characteristics of the various embodiments and variants mentioned above may be, in whole or in part, combined with one another. Thus, the aerial platform 1 can be adapted in terms of cost, ergonomics and performance.

Claims (9)

  1. Man lift (1), comprising:
    - a chassis (10);
    - a lifting system (18);
    - a first axle (20) having two wheels (21, 22) and a hydraulic drive system (23, 24) for said two wheels (21, 22);
    - a second axle (30) having two wheels (31, 32) and an electric drive system (33, 34) for said two wheels (31, 32); and
    - an energy supply unit (40; 140; 240; 340) that has different modes of operation (M1-M10) and is configured to selectively supply energy to the lifting system (18), the hydraulic drive system (23, 24) and the electric drive system (33, 34);
    where the energy supply unit (40; 140; 240; 340) includes a combustion engine (41), a pumping system (50; 150; 250; 350), a generator (61) and a battery unit (62);
    wherein the pumping system (50; 150; 250; 350) is coupled to the combustion engine (41), to the lifting system (18) and to the hydraulic drive system (23, 24); wherein the battery unit (62) is coupled to the generator (61) and to the electric drive system (33, 34),
    characterised in that the pumping system is coupled to the generator (61), and
    in that the man lift (1) comprises a turret (12) that supports the lifting system (18) and is movable in rotation relative to the chassis (10) around a vertical axis of rotation, and
    in that the combustion engine (41) equips the turret (12), while the generator (61) and the battery unit (62) equip the chassis (10).
  2. Man lift (1) according to the preceding claim, characterised in that each axle (20; 30) between the first axle (20) and the second axle (30) is selectively motor or non-motor depending on the mode of operation selected from among the different modes of operation (M1-M10) of the energy supply unit (40; 140; 240; 340).
  3. Man lift (1) according to either one of the preceding claims, characterised in that among the different modes of operation (M1-M10), the energy supply unit (40; 140; 240; 340) has at least one mode of operation (M9; M11) wherein the lifting system (18) is supplied by the pumping system (50; 150; 250; 350), which is driven by the generator (61), which is supplied by the battery unit (62), while the combustion engine (41) is stopped.
  4. Man lift (1) according to any one of the preceding claims, characterised in that the turret (12) is movable in rotation 360 degrees continuously relative to the chassis (10) around the vertical axis of rotation.
  5. Man lift (1) according to any one of the preceding claims, characterised in that the pumping system (50; 150; 250; 350) comprises hoses (73, 74, 93, 94; 73, 74, 393, 394) that hydraulically connect the turret (12) to the chassis (10), passing through connection members (75, 76, 95, 96) disposed between the chassis (10) and the turret (12).
  6. Man lift according to claim 5, characterised in that the connection members (75, 76, 95, 96) disposed between the chassis (10) and the turret (12) are formed by conduits (143, 144, 145, 146, 147) from a rotary hydraulic seal forming a connection interface (14) between the chassis (10) and the turret (12).
  7. Man lift (1) according to any one of the preceding claims, characterised in that the pumping system (50; 150; 250; 350) comprises:
    - a first pump (52) mechanically coupled to the combustion engine (41);
    - a hydraulic motor (53) hydraulically coupled to the first pump (52); and
    - a second pump (54; 254; 354) mechanically or hydraulically connected to the hydraulic motor (53), particularly so that it can be disengaged, mechanically coupled to the generator (61) and hydraulically coupled to the hydraulic drive system (23, 24).
  8. Man lift (1) according to claim 7, characterised in that the second pump (54) or a third pump (255; 355) is hydraulically coupled to the lifting system (18).
  9. Method of implementation of a man lift (1) according to any one of the preceding claims, characterised in that the method includes a step of selecting a mode of operation of the man lift (1) from among at least the following different modes of operation (M2; M3; M5; M6; M9):
    - a mode (M2) where the combustion engine (41) and the pumping system (50) drive the generator (61), so as to recharge the battery unit (62), while the man lift (1) is stationary;
    - a mode (M3) wherein the combustion engine (41) and the pumping system (50) supply the hydraulic drive system (23, 24) and drive the generator (61), so as to move the man lift (1) while recharging the battery unit (62);
    - a mode (M5) where the combustion engine (41) and the pumping system (50) supply the hydraulic drive system (23, 24), while the battery unit (62) supplies the electric drive system (33, 34);
    - a mode (M6) where the combustion engine (41) and the pumping system (50) supply the lifting system (18), while driving the generator (61) so as to recharge the battery unit (62);
    - a mode (M9) where the battery unit (62) supplies the generator (61) which drives the pumping system (50), which supplies the lifting system (18), while the man lift (1) is stationary.
EP15763263.9A 2014-09-05 2015-09-04 Man lift and method of operating such a man lift Active EP3188999B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1458345A FR3025504A1 (en) 2014-09-05 2014-09-05 LIFT BOOM AND METHOD FOR IMPLEMENTING SUCH AN ELEVATOR NACELLE
PCT/EP2015/070293 WO2016034724A1 (en) 2014-09-05 2015-09-04 Man lift and method of operating such a man lift

Publications (2)

Publication Number Publication Date
EP3188999A1 EP3188999A1 (en) 2017-07-12
EP3188999B1 true EP3188999B1 (en) 2018-05-09

Family

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Application Number Title Priority Date Filing Date
EP15763263.9A Active EP3188999B1 (en) 2014-09-05 2015-09-04 Man lift and method of operating such a man lift

Country Status (3)

Country Link
EP (1) EP3188999B1 (en)
FR (1) FR3025504A1 (en)
WO (1) WO2016034724A1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5810106A (en) * 1995-03-15 1998-09-22 Stamler Corporation Vehicle drive system
GB2447229B (en) * 2007-03-07 2011-11-02 Niftylift Ltd Mobile work platform with multiple mode drive system
US20110198141A1 (en) * 2010-02-16 2011-08-18 Genie Industries, Inc. Hydraulic electric hybrid drivetrain
CN101797885A (en) * 2010-05-07 2010-08-11 威海广泰空港设备股份有限公司 Double-power device with transfer case of container lifting platform truck

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
WO2016034724A1 (en) 2016-03-10
EP3188999A1 (en) 2017-07-12
FR3025504A1 (en) 2016-03-11

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