EP4071301B1 - Machine autonome à fraiser le sol et procédé de fonctionnement d'une machine à fraiser le sol en mode d'urgence - Google Patents

Machine autonome à fraiser le sol et procédé de fonctionnement d'une machine à fraiser le sol en mode d'urgence Download PDF

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Publication number
EP4071301B1
EP4071301B1 EP22163952.9A EP22163952A EP4071301B1 EP 4071301 B1 EP4071301 B1 EP 4071301B1 EP 22163952 A EP22163952 A EP 22163952A EP 4071301 B1 EP4071301 B1 EP 4071301B1
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EP
European Patent Office
Prior art keywords
hydraulic
emergency
milling machine
ground milling
hydraulic pump
Prior art date
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EP22163952.9A
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German (de)
English (en)
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EP4071301A1 (fr
Inventor
Jens-Martin Zehbe
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Bomag GmbH and Co OHG
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Bomag GmbH and Co OHG
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Priority claimed from DE102021118784.2A external-priority patent/DE102021118784A1/de
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Publication of EP4071301A1 publication Critical patent/EP4071301A1/fr
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/08—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades
    • E01C23/085—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades using power-driven tools, e.g. vibratory tools
    • E01C23/088—Rotary tools, e.g. milling drums
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/12—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor
    • E01C23/122—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor with power-driven tools, e.g. oscillated hammer apparatus
    • E01C23/127—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor with power-driven tools, e.g. oscillated hammer apparatus rotary, e.g. rotary hammers

Definitions

  • the invention relates to a ground milling machine and a method for operating a ground milling machine in an emergency mode.
  • a generic ground milling machine is self-propelled and includes a machine frame, a control stand, a primary drive unit with which the drive energy required for the regular operation of the ground milling machine is made available, a ground milling device with a milling drum arranged inside a milling drum box and rotatable about an axis of rotation, and front and rear milling drums Driving devices, wherein at least one of the front and/or the rear driving devices is connected to the machine frame via a vertically adjustable lifting device.
  • Such ground milling machines are, for example, from DE102015016678A1 and the DE102014019168A1 known.
  • the DE102014011195A1 describes such a ground milling machine in which a maintenance motor separate from the main drive motor can operate a compressor for maintenance work, for example.
  • a maintenance motor separate from the main drive motor can operate a compressor for maintenance work, for example.
  • Such ground milling machines are usually used in road and path construction, for example for roadway rehabilitation. To do this, the ground milling machines can lower the milling drum into the subsoil and remove layers of soil to a desired milling depth. Even if these machines are basically reliable in use, operating situations can arise in which the prime mover stops working, for example due to engine damage.
  • ground milling machines are often used in construction site situations that are subject to high deadline pressure, it is important in such cases to be able to move the ground milling machine out of the specific construction site position as quickly as possible so that, for example, milling work can be continued by another ground milling machine.
  • Ground milling machines in particular of the mid-rotor type, in which the ground milling device is arranged between the front and rear driving devices, such as wheels and/or crawler tracks, as seen in the direction of travel of the machine, are very heavy machines and cannot usually be removed without increased effort if the primary drive unit is defective offset.
  • the DE102012022732A1 suggests as a possible solution that the ground milling machine be converted into a towable vehicle with the help of an auxiliary drive state can be brought. While this approach is helpful, towing rotary tillers is also time-consuming and often requires dedicated towing vehicles.
  • the object of the invention is to provide a way of being able to better move and relocate a ground milling machine when the primary drive unit is defective.
  • a generic self-propelled ground milling machine thus comprises a machine frame which forms the essential support structure of the ground milling machine.
  • the drive energy required for regular operation of the ground milling machine is generated by a primary drive assembly of the ground milling machine.
  • This can in particular be a diesel internal combustion engine.
  • Part of the ground milling machine is also a ground milling device with a milling drum arranged inside a milling drum box and rotatable about an axis of rotation.
  • front and rear travel devices wherein at least one of the front and/or the rear travel devices can preferably be connected to the machine frame via a lifting device that can be adjusted in the vertical direction.
  • it can also be provided that all of the travel devices are each connected to the machine frame via a lifting device.
  • the drive circuit comprises at least one main hydraulic pump driven by the prime mover and at least one hydraulic motor driven by the main hydraulic pump in a closed hydraulic circuit.
  • the at least one hydraulic motor is thus in particular a travel drive hydraulic motor or a conveyor belt drive motor.
  • the main hydraulic pump is thus fed in a closed circulation system with the hydraulic fluid returning from the respective hydraulic motor.
  • pressurized hydraulic fluid is therefore present in the line system both on the high-pressure side and on the low-pressure side.
  • a closed hydraulic circuit of the present type can also have other elements that consume torque and/or hydraulic fluid volume, such as a feed pump to compensate for leakage oil losses, a flushing branch, etc.
  • Several hydraulic motors, in particular connected in parallel, can also be driven by a closed hydraulic circuit. In ground milling machines of the generic type, this can be the case, for example, with the traction motors of the traction devices.
  • the at least one hydraulic drive circuit in the conveying direction has a disconnection and/or connection point in front of and behind the at least one hydraulic motor, in particular in each case.
  • a separation and/or connection point thus designates a device within the hydraulic fluid routing of the closed hydraulic circuit, with which the closed hydraulic circuit can be separated with regard to its hydraulic fluid routing (separation point).
  • a hydraulic emergency supply system can now be connected at this point of separation or at another point, as described below.
  • the separation and/or connection point is thus a device that is already set up in such a way that it is designed for, at least functionally, separating the existing hydraulic lines and for connecting other hydraulic lines.
  • the design as a separation and/or connection point expresses the fact that another hydraulic fluid connection can be connected at the separation point to the hydraulic motor.
  • the closed hydraulic circuit thus includes set separation and/or access points for connecting an emergency hydraulic pump.
  • the emergency hydraulic pump is part of a hydraulic emergency supply system, ideally permanently installed in the ground milling machine.
  • the emergency supply system can be connected to the disconnection and connection points for emergency operation of the at least one hydraulic motor in such a way that the closed hydraulic circuit is interrupted and hydraulic fluid can be conveyed from the emergency hydraulic pump in an open emergency hydraulic circuit to drive the at least one hydraulic motor, bypassing the main hydraulic pump.
  • This makes it possible to drive the hydraulic pump at least for a limited period of time with little power, but sufficiently to empty the belt and/or to drive the ground milling machine.
  • the essential step here is, on the one hand, to open the closed hydraulic circuit, which is intended for regular operation, so to speak, and thus make it accessible for operation by the emergency hydraulic pump.
  • bypassing the main hydraulic pump which does not have to be towed, increases the efficiency of this emergency system. Practically the entire hydraulic power of the emergency hydraulic pump is available to drive the hydraulic motor, which was previously integrated in the closed hydraulic circuit. In this way, the emergency hydraulic pump can be designed to be small and compact and comparatively inefficient compared to the main hydraulic pump, for example.
  • the drive of the conveyor belt and the travel drive take place via mutually separate, closed hydraulic circuits, each comprising a main hydraulic pump and at least one hydraulic motor.
  • both of the closed hydraulic circuits each have separation and connection points of the type described above.
  • only a single emergency hydraulic pump can be provided on the ground milling machine, so that usually a connection is made successively at first to the closed hydraulic circuit of the conveyor belt for emptying the conveyor belt load and then changing the connection of the emergency hydraulic pump to the closed hydraulic circuit of the travel drive for moving the ground milling machine. This can be done manually, for example, by reconnecting hoses and/or using suitable valves.
  • the separation and connection points are positioned in the conveying direction of the closed hydraulic circuit in such a way that conveying distances are as short as possible. Irrespective of this, it is advantageous if, when the emergency supply system is connected, a feed pump and/or a rinsing stage of the closed hydraulic circuit are bypassed by the open emergency hydraulic circuit. It is ideal if, when connecting the emergency supply system, in particular all elements of the closed hydraulic circuit that consume torque and/or hydraulic fluid, apart from the respective at least one hydraulic motor, are bypassed. In this way it is ensured that the largest possible proportion of the hydraulic energy generated by the emergency hydraulic pump can be used to drive the respective hydraulic motor. It is preferred if the separation and/or connection point can be reached and/or operated from the operator's station.
  • the separation and connection points can have switching valves, especially 3/2 or 4/3-way valves, especially comprising a blocking position and one or two delivery positions.
  • Such switching valves can also be supplemented with couplings, in particular quick couplings, in order to facilitate the disconnection of the closed hydraulic circuit and the connection of the emergency hydraulic pump and a tank discharge line.
  • the line system of the emergency supply system is fully or partially pre-installed on the ground milling machine, for example in the form of pre-installed piping and/or hoses, and/or is produced in an emergency, for example by using flexible hoses etc.
  • Suitable switching means for example for use as a disconnection and/or connection point, can also be pre-installed or only produced when required.
  • the main task of the emergency hydraulic circuit is to provide at least sufficient drive energy in an emergency to enable powered belt emptying and/or at least slow drive of the ground milling machine so that it can move to another location and/or onto a transport vehicle under its own power can move.
  • the emergency hydraulic circuit can have a hydraulic pump, in particular a controllable one, as an emergency hydraulic pump. This can be permanently installed on the floor milling machine.
  • a switching valve which can be operated in particular by hand, especially a 4/3-way valve.
  • the drive energy required to drive the emergency hydraulic pump can be provided by the primary drive unit or by an auxiliary drive unit that is independent of the primary drive unit.
  • the auxiliary drive unit can have an internal combustion engine and/or an electric motor, for example.
  • the auxiliary drive unit is preferably arranged in the engine compartment of the ground milling machine.
  • the emergency hydraulic pump may be a separate dedicated emergency hydraulic pump.
  • provision can also be made for an existing hydraulic pump, which is operated in an open hydraulic circuit during regular operation of the ground milling machine, to be turned into an emergency hydraulic pump in an emergency by suitably changing the connection paths, in particular as described above and below.
  • the extent to which components of the emergency supply system are pre-installed in the ground milling machine can vary. In the extreme case, it can be provided that the conversion to drive the at least one hydraulic motor by the emergency supply system is carried out entirely by hand. On the other hand, it is also possible for the entire emergency supply system to be permanently installed in the ground milling machine. It is also conceivable that a machine control system automatically recognizes the emergency supply operation or that such a mode is specified manually by an operator. Operating elements can be used to control the emergency supply system, which are used in normal operation for the normal operation of the ground milling machine. This has the advantage that no additional controls have to be installed. However, separate controls are possible. One or more safety circuits can also be provided, for example to protect one or more hydraulic pumps, etc.
  • the ground milling machine has at least partially permanently installed pipelines and/or hydraulic hoses of the emergency supply system, in order to ensure reliable and, in particular, easier conversion in an emergency make possible.
  • the emergency supply system has flexible hose pieces, in particular comprehensively connecting elements that can be connected to the separation and connection points.
  • the emergency supply system does not have a structurally fixed connection to the closed hydraulic circuit in regular operation. This serves in particular to ensure operational safety, for example in order to prevent an unwanted connection to a fluid-conducting connection from components of the emergency supply system to the closed hydraulic circuit which is under comparatively high pressure.
  • the emergency hydraulic pump is driven completely independently of the primary drive assembly, in particular by means of at least one opposite the primary drive assembly by a factor of 5, in particular at least by a factor of 10, less powerful auxiliary drive unit.
  • ground milling machines have an auxiliary motor, for example in order to be able to rotate a milling drum independently of a significantly more powerful primary drive unit during maintenance work.
  • Such an auxiliary engine for generating drive energy independently of the primary drive unit can now also be used according to the invention additionally or alternatively to generate compressed air for a chisel hammer, to drive a pump for filling the water tank of the ground milling machine or to fulfill other drive functions. It is ideal if this auxiliary motor is also designed to drive the emergency hydraulic pump at the same time and thus fulfills at least a double function. It is then possible to operate the emergency supply system without the drive energy required for this having to be generated by the primary drive unit.
  • the separation and/or connection point is preferably selected in such a way that a reversal of the conveying direction and thus reverse operation of the at least one hydraulic motor by the emergency supply system is also possible.
  • the ground milling machine is particularly preferably suitable for carrying out the method according to the invention described below.
  • a further aspect of the invention relates to a method for operating a ground milling machine, in particular a ground milling machine according to one of the preceding claims, in an emergency mode.
  • Essential steps are the disconnection of a closed hydraulic circuit with a main hydraulic pump and a hydraulic motor provided in regular operation for driving at least one driving device and/or at least one milled material conveyor at at least one disconnection and connection point, that, in particular, subsequent establishment of a connection via the at least one disconnection and connection point to an emergency hydraulic pump, and finally the delivery of hydraulic fluid by the emergency hydraulic pump to the hydraulic motor, bypassing at least the main hydraulic pump, in particular bypassing all other elements of the (former) closed hydraulic circuit that consume torque and/or hydraulic fluid.
  • a discharge line is established to a hydraulic tank.
  • the fluid conveyed by the emergency hydraulic pump to the hydraulic motor can be returned to the hydraulic tank essentially without pressure.
  • More than one separation and/or connection point can also be provided, in particular at least two.
  • the emergency hydraulic pump is preferably driven by an auxiliary drive unit that can be operated completely independently of the primary drive unit. Even in the event of a total failure of the primary drive assembly, emergency operation is still possible in this way, which, for example, at least enables slow driving and/or slow unloading of the conveying device.
  • FIG 1 shows a ground milling machine 1 in a side view, specifically on the right side of the machine in relation to the forward direction A.
  • the essential elements of the ground milling machine 1 are a machine frame 2, a primary drive unit 3, preferably a diesel internal combustion engine, a ground milling device 4, front driving devices 5, rear driving devices 6 and a control station 7.
  • the soil milling device comprises a milling drum box 8, inside which a (in figure 1 dashed line indicated) milling drum 9 is present. This can comprise a hollow-cylindrical supporting tube, on the outer surface of which a multiplicity of milling tools are arranged.
  • the milling drum 9 is rotatable about a horizontal axis of rotation R running transversely to the forward direction A.
  • the milling drum 9 engages in the subsoil U and thereby mills up subsoil material.
  • the resulting milled material is collected in the milling drum box 8 and can then be loaded via transport devices 10 and 11, for example onto a transport vehicle.
  • the transport device 10 can be an internal conveyor belt, whereas the transport device 11 can be a so-called external or trailer conveyor belt.
  • the exemplary embodiment shown in the figures shows a ground milling machine 1 in which the ground milling device 4 is arranged between the front driving devices 5 and the rear driving devices 6 as seen in the forward direction A.
  • the invention also extends to such ground milling machines in which the ground milling device 4 is arranged at the level of the rear driving devices 6 seen in the forward direction A, as is the case with so-called tail rotor milling machines.
  • These ground milling machines are used, for example, for milling asphalt or for milling open asphalt surfaces in need of rehabilitation.
  • the ground milling machine 1 usually moves in the forward direction A, so that this direction can also be referred to as the working direction.
  • the ground milling machine is thus in particular a road cold milling machine.
  • the driving devices 5 and/or 6 can be connected to the machine frame 2 via lifting devices, for example lifting columns 12 in the present case.
  • lifting devices for example lifting columns 12 in the present case.
  • the vertical spacing of the machine frame and thus, for example, the immersion depth of the milling drum 9 in the subsoil U can be varied.
  • all of the front and rear driving devices 5/6 are each connected to the machine frame 2 via such a lifting column 12 .
  • Embodiments are also conceivable in which only the front or only the rear driving devices are connected to the machine frame via corresponding lifting columns.
  • the drive energy required to operate the ground milling machine 1 is provided by the primary drive unit 3 .
  • This can be arranged in the rear of the machine, such as in the figure 1 shown.
  • Individual hydraulic consumers of the ground milling machine 1 can be arranged in one or more closed hydraulic circuits.
  • Hydraulic consumers of this type can be hydraulic motors, for example hydraulic motors 13 for driving and/or hydraulic motors 14 for driving the transport devices 10 and 11.
  • An example of the hydraulic motor 13 for driving the driving devices 6 on the right-hand side behind the ground milling machine 1 is shown in figure 1 a main hydraulic pump 15 driven directly or indirectly by the primary drive unit 3 is provided, which is located in an in figure 1 only indicated closed hydraulic circuit 16 is arranged with the hydraulic motor 13.
  • closed hydraulic circuits can also be provided, for example a closed hydraulic circuit for two or more hydraulic motors 13 of the driving devices 5 or 6, and another separate closed hydraulic circuit for driving the hydraulic motor or motors 14.
  • Each closed hydraulic circuit preferably has its own main hydraulic pump 15 on.
  • FIG 3 illustrates further details on the closed hydraulic circuit 16 and the auxiliary connection of an emergency hydraulic pump 17 according to the invention
  • Hydraulic circuit 16 are the main hydraulic pump 15 and the hydraulic motors 13 connected via the line system in a closed hydraulic circuit figure 3
  • the hydraulic motor 13′ gives the option that several hydraulic motors, preferably connected in parallel to one another, can be connected in a common, closed hydraulic circuit 16. In the present case, this can be the case in particular for the hydraulic motors of the driving devices 5 and 6 .
  • the closed hydraulic circuit 16 according to figure 3 also includes a feed pump 18, which is designed to compensate for, for example, leakage oil losses and/or for cooling and/or filtering purposes branched off amounts of fluid from the closed hydraulic circuit. This can be structurally combined in a pump module 19 .
  • a rinsing device can also be provided, which can also be designed as a modular building block 20 .
  • the line system of the closed hydraulic circuit 16 can be opened and connected to the emergency hydraulic pump 17 via the separation and connection points 21A and 21B.
  • the emergency hydraulic pump 17 or the corresponding emergency supply system comprises two connection points 22A and 22B in order to preferably enable a fluid-conducting connection in both directions of flow of the hydraulic motor 13 . In the present case, this allows the ground milling machine 1 to drive forwards and backwards under its own power, even during emergency operation, which can make maneuvering easier.
  • FIG 3 clarifies that the separation and connection points 21A and a 21B are arranged in the closed hydraulic circuit 16 in such a way that the main hydraulic pump 15, the feed pump 18 and the rinsing stage 20 are not supplied with hydraulic fluid when the emergency hydraulic pump 17 is connected and accordingly by the connection of the Emergency hydraulic pump 17 obtained open hydraulic circuit to the hydraulic motor 13 are bypassed.
  • the emergency hydraulic circuit obtained can have a valve device 23 which is arranged between the emergency hydraulic pump and the hydraulic motor 13 and can be actuated manually, in particular via an actuating lever 24 .
  • the connection to a control unit of the floor milling machine is also possible here.
  • the conveying direction towards the hydraulic motor 13 can be reversed with the aid of the valve device 23 .
  • a blocking position of the valve device 23, which prevents any fluid delivery in the open hydraulic circuit, can be provided.
  • the emergency hydraulic pump 17 can be driven by an electric motor, an auxiliary motor and/or by the prime mover.
  • FIG 4 finally illustrates the sequence of a method according to the invention for operating a ground milling machine 1 in an emergency mode.
  • a closed hydraulic circuit with a main hydraulic pump and a hydraulic motor which is provided in regular operation to drive at least one traction device and/or at least one milled material conveyor, is first separated at two separation and connection points, for example as in figure 3 shown. It is then provided that in step 26 a connection is established via at least one of the two separation and connection points to an emergency hydraulic pump. If this has happened, in step 27 hydraulic fluid can be conveyed by the emergency hydraulic pump to the hydraulic motor, bypassing at least the main hydraulic pump, in particular bypassing all elements consuming torque and/or hydraulic fluid.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Road Repair (AREA)

Claims (9)

  1. Engin de fraisage du sol automoteur (1) comprenant :
    - un châssis (2) de machine, une plateforme opérateur (7), une unité d'entraînement primaire (3), un dispositif (4) de fraisage du sol avec un tambour de fraisage (9) installé à l'intérieur d'un carter (8) de tambour de fraisage et rotatif autour d'un axe de rotation (R), des unités de déplacement avant (5) et arrière (6), au moins l'une des unités de déplacement avant et/ou arrière (5, 6) étant raccordée au châssis (2) de machine via un dispositif de levage vertical réglable ;
    dans lequel au moins un circuit d'entraînement hydraulique est prévu pour entraîner au moins l'une des unités de déplacement (5, 6) et/ou pour entraîner un convoyeur de matériau broyé, avec au moins une pompe hydraulique principale (15) entraînée par l'unité d'entraînement primaire (3) et au moins un moteur hydraulique (13, 13') entraîné par la pompe hydraulique principale (15) dans un circuit hydraulique fermé (16) ;
    caractérisé en ce que
    ledit au moins un circuit d'entraînement hydraulique comprend un point de séparation et/ou un point de raccordement (21A, 21B) en amont et en aval dudit au moins un moteur hydraulique (13, 13') ; et
    l'engin (1) de fraisage du sol comporte une pompe hydraulique d'urgence (17) qui fait partie d'un système d'alimentation hydraulique d'urgence ;
    dans lequel le système d'alimentation hydraulique d'urgence peut être raccordé au point de séparation et/ou de raccordement (21A, 21B) pour un fonctionnement d'urgence du moteur hydraulique (13, 13') de telle sorte que le fluide hydraulique puisse être acheminé par la pompe hydraulique d'urgence (17) dans un circuit hydraulique d'urgence ouvert pour entraîner ledit au moins un moteur hydraulique (13, 13') tout en évitant la pompe hydraulique principale (15).
  2. Engin de fraisage du sol automoteur (1) selon la revendication 1,
    caractérisé en ce que
    les points de séparation et de raccordement (21A, 21B) dans le circuit hydraulique fermé (16) sont positionnés de telle sorte que
    - lors du raccordement du système d'alimentation d'urgence, une pompe d'alimentation (18) et/ou un étage de purge (20) du circuit hydraulique fermé (16) sont contournés par le circuit hydraulique d'urgence ouvert ;
    - lors du raccordement du système d'alimentation d'urgence, en particulier tous les éléments consommateurs de couple et/ou de fluide hydraulique du circuit hydraulique fermé (16), sont contournés, à l'exception dudit au moins un moteur hydraulique (13, 13').
  3. Engin de fraisage du sol automoteur (1) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les points de séparation et de raccordement (21A, 21B) présentent au moins l'une des caractéristiques suivantes :
    - ils comprennent des vannes de commutation, tout spécialement des vannes 3/2- ou 4/3-voies, comprenant en particulier une position de blocage et une ou deux positions de circulation ;
    - ils comprennent des raccords rapides.
  4. Engin de fraisage du sol automoteur (1) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le circuit hydraulique d'urgence comprend au moins l'une des caractéristiques suivantes :
    - il comprend une pompe hydraulique, en particulier une pompe hydraulique réglable ;
    - il comprend une pompe hydraulique installée de manière permanente sur l'engin (1) de fraisage du sol ;
    - il comprend une vanne de commutation, en particulier une vanne pouvant être opérée manuellement ;
    - il comprend en particulier une vanne 4/3-voies ;
    - il comprend un élément de commande installé ou pouvant être installé sur la plateforme opérateur (7) de l'engin (1) de fraisage du sol.
  5. Engin de fraisage du sol automoteur (1) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    le système d'alimentation d'urgence présente au moins l'une des caractéristiques suivantes :
    - il comprend des canalisations et/ou des tuyaux hydrauliques installés de manière permanente dans l'engin (1) de fraisage du sol ;
    - il comprend des sections de tuyaux flexibles pour s'approcher des points de séparation et de raccordement (21A, 21B), comprenant en particulier des éléments de raccordement qui peuvent être raccordés aux points de séparation et de raccordement (21A, 21B).
  6. Engin de fraisage du sol automoteur (1) selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la pompe hydraulique d'urgence (17) est entraînée de manière totalement indépendante de l'unité d'entraînement primaire (3), en particulier au moyen d'une unité d'entraînement auxiliaire qui est moins puissante d'au moins un facteur 5, en particulier d'au moins un facteur 10, que l'unité d'entraînement primaire (3).
  7. Procédé d'utilisation d'un engin (1) de fraisage du sol selon l'une quelconque des revendications précédentes, dans un mode d'utilisation d'urgence, comprenant les étapes de :
    - séparation, au niveau d'au moins un point de séparation et/ou de raccordement (21A, 21B), d'un circuit hydraulique fermé (16) ayant une pompe hydraulique principale (15) et un moteur hydraulique (13, 13') et prévu en fonctionnement régulier pour entraîner au moins une unité de déplacement (5, 6) et/ou au moins un convoyeur de matériau broyé ;
    - établissement d'un raccordement avec une pompe hydraulique d'urgence via au moins l'un des deux points de séparation et de raccordement (21A, 21 B) ;
    - acheminement, par la pompe hydraulique d'urgence (17), de fluide hydraulique au moteur hydraulique (13, 13') tout en évitant la pompe hydraulique principale (15), en particulier tout en évitant tous les éléments consommateurs de couple et/ou de fluide hydraulique.
  8. Procédé selon la revendication 7,
    caractérisé en ce que
    le procédé comprend en outre l'établissement d'une canalisation d'évacuation dans un réservoir hydraulique.
  9. Procédé selon l'une quelconque des revendications 7 ou 8,
    caractérisé en ce que
    la pompe hydraulique d'urgence (17) est entraînée par une unité d'entraînement auxiliaire qui peut être utilisée de manière totalement indépendante de l'unité d'entraînement primaire (3).
EP22163952.9A 2021-04-06 2022-03-23 Machine autonome à fraiser le sol et procédé de fonctionnement d'une machine à fraiser le sol en mode d'urgence Active EP4071301B1 (fr)

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DE102021001759 2021-04-06
DE102021118784.2A DE102021118784A1 (de) 2021-04-06 2021-07-20 Selbstfahrende bodenfräsmaschine und verfahren zum betrieb einer bodenfräsmaschine in einem notbetrieb

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US (1) US11982058B2 (fr)
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Family Cites Families (14)

* Cited by examiner, † Cited by third party
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US3952510A (en) * 1975-06-06 1976-04-27 Caterpillar Tractor Co. Flow sensing and control apparatus
US4325580A (en) * 1979-05-07 1982-04-20 Cmi Corporation Roadway planing apparatus
US4453451A (en) * 1980-11-10 1984-06-12 Fiatallis North America, Inc. Hydraulic steering system with automatic emergency pump flow control
NZ217707A (en) * 1986-10-31 1989-07-27 William Ian Wood Pavement dynamic testing: driven wheel bogie on circular track loaded horizontally by cantilever arm
CN2837372Y (zh) * 2005-11-01 2006-11-15 长安大学 铣刨机的液压前轮驱动装置
KR100938760B1 (ko) * 2009-07-08 2010-01-26 한국도로공사 유압시스템을 이용한 도로홈 절삭장치
DE102011119935A1 (de) * 2011-12-01 2013-06-06 Bomag Gmbh Antriebsvorrichtung in einer selbstfahrenden Baumaschine
DE102012022732A1 (de) 2012-11-21 2014-05-22 Bomag Gmbh Baumaschine mit einer Arbeitseinrichtung zur Bodenuntergrundbearbeitung und Verfahren zum Betrieb einer solchen Baumaschine
DE102014011195B4 (de) * 2014-07-28 2018-09-13 Bomag Gmbh Bodenfräsmaschine mit von einem Wartungsmotor betriebenem Kompressor und Verfahren zum Betrieb einer solchen Bodenfräsmaschine
DE102014019168A1 (de) 2014-12-19 2016-06-23 Bomag Gmbh BAUMASCHINE, INSBESONDERE STRAßENFRÄSE, UND VERFAHREN ZUM AUSGLEICHEN VON BODENUNEBENHEITEN FÜR EINE SOLCHE BAUMASCHINE
JP2017078302A (ja) * 2015-10-21 2017-04-27 鹿島道路株式会社 斜面施工機械支持機構及び支持方法
DE102015016678A1 (de) 2015-11-06 2017-05-11 Bomag Gmbh Verfahren zum Anbau einer Fräseinheit einer Bodenfräsmaschine und Bodenfräsmaschine mit einer ab- und anbaubaren Fräseinheit
JP6710150B2 (ja) * 2016-11-24 2020-06-17 日立建機株式会社 建設機械
DE102019127735B4 (de) * 2019-10-15 2021-08-19 Wirtgen Gmbh Selbstfahrende Baumaschine

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EP4071301A1 (fr) 2022-10-12
US20220316157A1 (en) 2022-10-06
CN115198613B (zh) 2023-11-14
CN115198613A (zh) 2022-10-18
US11982058B2 (en) 2024-05-14

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