STRASSENBAUMASCHINE

Description

[0001] The invention relates to a road construction machine according to the preamble of claim 1 and a method according to claim 13.

[0002] Asphalt pavers (or asphalt pavers) are road construction machines primarily used for laying asphalt mixtures in road construction. The essential components of an asphalt paver typically include a chassis, a material hopper (feed hopper), scraper conveyors, a spreading auger, a screed, a heating system, and an automatic leveling system.

[0003] From EP 0 628 661 B1, a road paver with a primary drive unit designed as a self-contained component and detachable from the paver is known. From EP 2 333 158 B2, a diesel-hydraulic drive system for a road paver is known, where the energy required for operating the paver is supplied by an internal combustion engine or a diesel engine (primary drive source). EP 2 333 158 B2 further discloses that the diesel engine is directly connected to hydraulic pumps and, on the other hand, directly to the generator.

[0004] The use of diesel-electric drive systems in road construction machinery is also well-established. The diesel-electric drive incorporates a transmission system that converts the mechanical energy supplied by diesel engines into electrical energy using a generator and transfers it to the individual electric drive.

[0005] In recent years, emission reduction targets have driven the electrification of road construction machinery, and road construction machinery with an electric motor as its primary drive source is now known from the state of the art.

[0006] The availability of electricity or other emission-free energy sources, as well as emissions standards, vary from country to country. For manufacturers of road construction machinery, it is very costly to produce a machine type based on a suitable drive concept, depending on the emissions legislation and the infrastructure for emission-free energy sources in each country.

[0007] The object of the invention is to provide a single type of road construction machine in which the primary drive system can be adapted or replaced with minimal effort. For example, depending on the available energy source and emissions legislation of different countries, it may be necessary to use a different primary drive system.

[0008] This problem is solved by the features of claim 1 or claim 13.

[0009] According to a first aspect, the invention relates to a road construction machine comprising a chassis and a running gear. The road construction machine may further comprise one or more working units for installing or removing road surfacing and / or for conveying installation material. The road construction machine comprises a primary drive system, one or more individual drives, and an interface. The individual drives may be configured to drive the running gear and / or the working units. The primary drive system is configured to drive one or more individual drives of the road construction machine. The primary drive system is connectable to one or more individual drives via the interface. In particular, this enables the supply of power to one or more individual drives from the primary drive system. The primary drive system may be interchangeable.

[0010] The primary drive system can have one primary drive source. The primary drive source can be an internal combustion engine, a fuel cell, a battery, or an external power source located outside the road construction machine.

[0011] The road construction machine can be equipped with a buffer battery. This buffer battery allows for the balancing of peak loads and power demands. This enables the primary drive system and / or the primary power source to be smaller. The buffer battery can be a DC battery or an AC battery. It can be positioned between the primary drive system and one or more individual drives.

[0012] The road construction machine can have a first power converter. The first power converter can be located between the primary drive system and one or more individual drives. The first power converter can be located between the primary drive system and the buffer battery. The first power converter can be located between the interface and the buffer battery.

[0013] The first power converter can be a first inverter, a first rectifier, or a first converter. A first power converter may be required if the current supplied by the primary drive system does not match the current that can be stored in the buffer battery or the current required by the individual drives. For example, a rectifier is required if the primary drive system generates alternating current and a DC battery is used as a buffer. An inverter is required if the primary drive system generates direct current and an AC battery is used as a buffer. A converter may be required if the voltage supplied by the primary drive system does not match the voltage of the buffer battery.

[0014] The road construction machine can have a second power converter. The second power converter can be located between the buffer battery and one or more individual drives. If the current stored in the buffer battery (direct or alternating current) does not match the current required by the individual drives, the second power converter is necessary. The second power converter can be an inverter or a rectifier. Multiple second power converters can also be located between the buffer battery and the individual drives. The power distribution unit can be located between the one or more power converters and the individual drives.

[0015] The road construction machine may have a power distribution unit. The power distribution unit may be located between the buffer battery and the individual drives. Alternatively, the power distribution unit may be located between the buffer battery and one or more power converters.

[0016] The primary drive system may include an internal combustion engine, in particular a diesel engine. The primary drive system may include a fuel tank and / or a biofuel tank.

[0017] The primary drive system may include a gas engine. The primary drive system may include a hydrogen tank or a pressure tank, in particular a pressure tank for natural gas and / or LPG.

[0018] The primary drive system may include a fuel cell. The primary drive system may include a hydrogen tank or a pressure tank, in particular a pressure tank for natural gas and / or LPG.

[0019] The primary drive system may include a battery. The primary drive system may also include a third power converter. The third power converter may be an inverter, a rectifier, or a current transformer.

[0020] The primary drive system may have load-bearing points. These load-bearing points could be designed to provide a lifting surface and / or point of attachment for a crane or forklift. The load-bearing points may be located on the primary drive source. Alternatively, the load-bearing points may be located on a container, in particular a fuel tank, a pressure tank, and / or a hydrogen tank, of the primary drive system.

[0021] The load-bearing points can be located on an internal combustion engine, a fuel cell, a battery, a fuel tank, a pressure tank, a hydrogen tank, or any combination thereof. For example, if the primary drive system includes an internal combustion engine and a fuel tank, the load-bearing points can be located on the internal combustion engine and the fuel tank. Similarly, if the primary drive system includes a gas engine and a pressure tank, the load-bearing points can be located on the gas engine and the pressure tank. Finally, if the primary drive system includes a fuel cell and a hydrogen tank, the load-bearing points can be located on the fuel cell and the hydrogen tank.

[0022] The road construction machine can have different primary drive systems. For example, the road construction machine can have a first primary drive system and a second primary drive system. The first primary drive system or the second primary drive system can have an internal combustion engine and a fuel tank. The first primary drive system or the second primary drive system can have a gas engine and a pressure tank. The first primary drive system or the second primary drive system can have a hydrogen tank and a fuel cell. The first primary drive system or the second primary drive system can have a battery and an overhead line, conductor rail, and / or trailing cable connected to an external power source.

[0023] The different primary drive systems, in particular the first and second primary drive systems, may have identical dimensions. The different primary drive systems, in particular the first and second primary drive systems, may have a uniform hole pattern for a screw and / or bolt connection. The different primary drive systems, in particular the first and second primary drive systems, may have a uniform locking component. The uniform locking component may be part of a locking system that, in particular, enables a connection and / or locking of the primary drive system to the road construction machine. The locking system may be self-acting and / or operate automatically. The uniform locking component may be part of a snap-fit ​​connection.

[0024] The first and second primary drive systems can be installed in parallel on the road construction machine. They can also be designed as alternative modules. Specifically, this means that if the first primary drive system is installed inside the road construction machine, the second primary drive system is located outside, and vice versa.

[0025] The interface can be automatic. The interface can include automatic locking and unlocking. The interface can include a detachable mechanical connection. The detachable mechanical connection can be configured to attach the primary drive system, in particular the primary drive source, to the road construction machine. The detachable mechanical connection can be automatic. The interface can include a first detachable electrical connection. The first detachable electrical connection can be configured to electrically connect the primary drive system to the buffer battery. The interface can include a second detachable electrical connection. The second detachable electrical connection can be configured to provide an electrical connection between the primary drive system and a control unit of the road construction machine.The second detachable electrical connection can be configured to enable communication between the primary drive system and the rest of the road construction machine, particularly the control system. The interface can include automatic locking and unlocking for the detachable mechanical connection, the first detachable electrical connection, and / or the second detachable electrical connection.

[0026] The road construction machine includes a control system. This control system is designed to identify the type of primary drive system, particularly the primary power source. For example, by communicating with the primary drive system, especially via the second detachable electrical connection, the control system can determine whether the primary drive system has an internal combustion engine, a gas engine, and / or a fuel cell, and / or is connected to an external power source, such as a public power grid or on-site power generation.

[0027] The control system can be configured to display drive-specific information to a user, particularly on an operator display, based on the type of primary drive system. If the primary drive system includes a tank, such as a fuel tank, a pressure tank, and / or a hydrogen tank, the control system can be configured to display the tank's fill level. The control system can also be configured to display the current power output of the internal combustion engine, gas engine, or fuel cell. Furthermore, the control system can be configured to activate or deactivate certain functions depending on the type of primary drive system. For example, certain displays or buttons on the operator display can be grayed out or hidden depending on the primary drive system.

[0028] The control system can be configured to control the road construction machine depending on the primary drive system. The control system can be configured to control one or more individual drives of the road construction machine depending on the primary drive system.

[0029] The individual drives can be electric drives for performing translational and / or rotational movements or electrically operated hydraulic units for performing translational and / or rotational movements.

[0030] The road construction machine can be a paver. The paver can have a material hopper (feed hopper) for receiving paving material, and working units such as a material handling device like a conveyor, a distribution screw, a screed, an automatic leveling system, and one or more electrically operated heating devices. The paver can have the following individual drives: rotary drives for the undercarriage, rotary drives for the scraper belts, rotary drives for the screw conveyors, linear drives for a material hopper wall cylinder, linear drives for the leveling cylinder, linear drives for raising and lowering the screed, linear drives for telescoping the screed, and rotary drives or a rotary drive system for the screed compaction devices. A screed heater can be connected to the electrical interface.

[0031] The road construction machine can be a feeder vehicle. Feeder vehicles are road construction machines used to supply asphalt pavers with paving material. For this purpose, the feeder vehicle is positioned in front of the asphalt paver in the direction of travel. Such a feeder vehicle is known from EP 2 377 995 A1. Feeder vehicles generally include a material hopper and a conveying system to transport paving mix from the feeder's hopper to the asphalt paver's hopper.

[0032] The road construction machine can be a milling machine. Milling machines, or cold milling machines, are well-known road construction machines used for processing road surfaces, for example, for road resurfacing. A cold milling machine typically has a frame that is driven by drive units equipped with tracks or wheels. The frame supports the power supply module, an operator station, a milling drum, and conveying devices.

[0033] The road construction machine can be a slipform paver. Slipform pavers are road construction machines used in the construction of concrete pavements. Concrete pavements are used for a wide variety of applications, such as the construction of highways, main roads, airport runways, container terminals, or railway lines. The slipform paver can have longitudinally and transversely telescopic machine frames, finishing devices (longitudinal finisher, transverse finisher), and hydraulic power units to drive the finishing devices.

[0034] According to a second aspect, the invention relates to a method for assembling a road construction machine. The road construction machine comprises one or more individual drives designed to drive the road construction machine, in particular to drive a chassis and / or working units of the road construction machine.

[0035] The procedure includes, among other things, the following steps: coupling one or more individual drives to the chassis and / or the working units; connecting one or more individual drives to an interface; installing a first primary drive system in the road construction machine; and connecting the first primary drive system to the interface. The person responsible understands that the individual procedure steps can be carried out in any order, provided this is technically feasible.

[0036] The procedure further includes disconnecting the first primary drive system from the interface. The procedure further includes removing the first primary drive system from the road construction machine. The procedure further includes inserting a second primary drive system into the road construction machine. The procedure further includes connecting the second primary drive system to the interface. The first primary drive system and the second primary drive system are different from each other.

[0037] The method may further include the installation of a buffer battery in the road construction machine. The method may further include connecting the first and / or second primary drive system to the buffer battery, in particular via the interface.

[0038] According to a third aspect, the invention relates to a road construction machine comprising a chassis, a running gear, several working units for installing or removing road surfacing and / or for conveying installation material, a primary drive system for driving the transmissions of the road construction machine, in particular the running gear and / or the working units of the road construction machine, wherein the primary drive system comprises several individual drives for mechanical coupling with the transmissions and a power supply system for supplying the individual drives with electrical current. At least three separate power supply paths, each comprising a separate primary drive source or each connected to a separate primary drive source, can be integrated into / are integrated into the power supply system, in particular independently or separately from one another. The power supply module is supported by the chassis.

[0039] An energy supply path can be an energy supply module of the energy supply system. A structural component of the energy supply path can be temporarily integrated into the energy supply system, preferably by being mounted in the installation space provided for the energy supply module.

[0040] Each of the at least three separate energy supply paths can be integrated individually and / or temporarily into the energy supply system. It would also be possible to integrate several of the at least three separate energy supply paths in combination into the energy supply system, particularly temporarily. It would also be possible to integrate all of the at least three separate energy supply paths together into the energy supply system. It would also be possible to integrate more than three separate energy supply paths, for example, four to six or five separate energy supply paths, into the energy supply system.

[0041] Each of the at least three separate power supply paths can individually provide electrical current for driving the individual drives, and / or the primary drive system can comprise only electrically operated individual drives. For the power supply system with at least three separate power supply paths, each comprising a separate primary drive source, the road construction machine can have a work platform. A separate installation space for each component of the three separate power supply paths can be available on the work platform. This makes it possible to accommodate all at least three separate power supply paths simultaneously on the road construction machine, particularly on the work platform, preferably connecting them in parallel.It would also be possible to integrate the at least three separate energy supply paths, each comprising a separate primary drive source, into the energy supply system asynchronously (with a time offset from one another). For example, only one of the at least three separate energy supply paths could be temporarily housed in the installation space of the road construction machine specifically designated for these energy supply paths, in particular the construction platform (i.e., the component of this energy supply path, for example, a fuel tank, an internal combustion engine, or a generator, could be integrated into the energy supply system). The remaining installation spaces for the other at least two energy supply paths could remain empty. Depending on requirements or the available energy source, the energy supply path in the road construction machine could be removed, i.e., the component of this energy supply path could be removed from the road construction machine.Subsequently, for example, a component of another of the at least three energy supply paths can be accommodated in the installation space of the road construction machine specifically designated for these energy supply paths, in particular the construction platform (i.e., the component of this energy supply path, for example, a hydrogen tank or a fuel cell, can be integrated into the energy supply system). This allows the primary drive source of the road construction machine to be replaced. The primary drive source of the road construction machine can be selected from various primary drive sources (for example, internal combustion engine, fuel cell, battery, or external power source).

[0042] The invention offers several advantages: For example, it allows for a reduction in the number of road construction machine types and provides a single type in which the primary drive source can be easily exchanged before delivery or during operation, depending on the available or temporarily suitable energy source at the sales target (or, for example, depending on the applicable emissions standard). This enables the use of different primary energy sources for the same road construction machine. Customers can then select the drive concept or the necessary energy supply path for the road construction machine according to local legislation and / or resource availability.

[0043] Manufacturing a single machine type for all sales targets advantageously reduces component diversity and significantly lowers construction costs. In this road construction machine, the energy supply system has a modular design. Within the energy supply system, a separate module or installation space is provided for each desired / planned primary drive source, specifically for the energy supply paths encompassing the desired primary drive source.

[0044] A further advantage of the invention lies in providing several separate energy supply paths, each comprising a separate primary drive source, simultaneously within the same road construction machine. This allows the individual drives to be powered simultaneously or sequentially by several different primary drive sources. Depending on requirements or local emissions regulations, the individual drives can be powered exclusively by emission-free primary drive sources (for example, a fuel cell or battery, or an external power source such as the public power grid).

[0045] The primary power source can be an internal combustion engine, such as a diesel engine, a gas engine, or a hydrogen engine. The internal combustion engine can have a generator or be mechanically connected to one. The primary power source can be a galvanic cell, such as a fuel cell, an accumulator, or a battery. The fuel cell can be a hydrogen-oxygen fuel cell. The fuel cell can convert the chemical reaction energy of a continuously supplied fuel and an oxidant into electrical energy. The accumulator can be a rechargeable device that stores electrical energy electrochemically. When the accumulator is discharged, stored chemical energy is converted into electrical energy through an electrochemical redox reaction. The accumulator can be a lithium-ion battery.The term "battery" can refer to a primary battery, which is non-rechargeable, or a secondary battery (or accumulator), which is rechargeable. The primary power source can be an external power source located outside the road construction machine, such as a public or private power grid.

[0046] The primary drive system can have an electrical interface between the individual drives and the power supply system. Each of the power supply paths of the power supply system, whether integrated or integrable into the road construction machine at the desired time, can be connected to this electrical interface. The respective electrical connection elements of the individual drives and the power supply paths are brought into contact with each other at the electrical interface for the transmission of electrical current. Through the electrical interface, each of the separate power supply paths can supply the individual drives with electrical current individually or independently of one another.

[0047] Each of the individual drives and / or each of the power supply paths can be connected to the electrical interface, preferably in parallel. The individual drives can be connected downstream of the electrical interface. The power supply paths can be connected upstream of the electrical interface. A switch can be connected to the electrical interface for each of the individual drives and / or for each of the power supply paths.

[0048] The electrical interface can include a power distribution unit. The electrical interface can be a power distribution unit. Within the power distribution unit, the power supply can be divided into individual circuits for the respective individual drives. The electrical interface can include a power converter, preferably an inverter or a rectifier. The electrical interface can be a power converter, preferably an inverter or a rectifier. The power converter can include a power distribution unit. Within the power converter, the electrical current (direct current or alternating current) supplied by each of the at least three separate power supply paths can be converted / changed. The individual drives can be powered by alternating current. In this case, the power converter can be an inverter.The inverter can convert the direct current supplied by each of the at least three separate power supply paths into alternating current.

[0049] A first power supply path of the power supply system can comprise a first fuel tank, a first internal combustion engine, a generator, and preferably a rectifier. These components can be arranged in this order within the power supply system and form the first power supply path. The rectifier of the first power supply path can be connected directly to the electrical interface or to the inverter, or directly to a buffer battery connected upstream of the electrical interface. The buffer battery can serve to supply power to individual drives in the event of a power failure or to compensate for different load conditions (voltage stabilization, absorption of short-term load peaks).It would also be conceivable that the generator of the first power supply path is directly connected to the electrical interface, which preferably includes a power distributor and / or a frequency converter. The first power supply path can include several fuel tanks, for example, a diesel tank and a biodiesel tank, with both tanks preferably being connected to the internal combustion engine or the diesel engine, respectively.

[0050] The first energy supply path of the energy supply system can include a second fuel tank and a second combustion engine. The second fuel tank can be a fuel gas tank, and the second combustion engine can be a gas engine or a hydrogen engine. The fuel gas tank can store natural gas or hydrogen. The first and second combustion engines can be mechanically coupled to the generator.

[0051] A second energy supply path of the energy supply system can include a hydrogen tank, preferably a separate tank for oxidizer, and a fuel cell. The hydrogen tank and / or the fuel cell can be connected directly to the electrical interface or directly to a buffer battery connected upstream of the electrical interface.

[0052] A third power supply path of the power supply system can include a battery, preferably a replaceable battery. The battery of the third power supply path can be directly connected to the electrical interface.

[0053] The third power supply path can include a first power connection, where the power connection is linked to an external power source located outside the road construction machine. The power source can be a public or private power grid, or a charging vehicle with an energy storage device (or battery).

[0054] The third power supply path of the power supply system can include a rectifier connected between the battery and the first power connection. This allows the battery to be charged.

[0055] A fourth power supply path of the power supply system can include a second power connection, which is connected to an external power source located outside the road construction machine, and a power line between the second power connection and the electrical interface. This allows the individual drives to be powered directly from the external power source.

[0056] One or more electrically operated heating devices can be connected to the electrical interface to be supplied with electrical power by the road construction machine's power supply system.

[0057] According to a fourth aspect, the invention relates to a method for constructing a primary drive system of a road construction machine for driving transmissions of the road construction machine, in particular a chassis and / or working units of the road construction machine, wherein the primary drive system comprises several individual drives and a power supply system for supplying the individual drives with electrical current, wherein the method comprises the following steps: coupling the individual drives to the transmissions, connecting the individual drives to an electrical interface, installing a first power supply path comprising a fuel tank, an internal combustion engine, a generator, and preferably a rectifier in the power supply system, and connecting the rectifier directly to the electrical interface or directly to a buffer battery connected upstream of the electrical interface.and / or providing a second power supply path comprising a hydrogen tank and a fuel cell in the power supply system and connecting the fuel cell directly to the electrical interface or directly to a buffer battery connected upstream of the electrical interface, and / or providing a third power supply path comprising a battery, preferably a replaceable battery, in the power supply system and connecting the battery directly to the electrical interface, and / or providing a fourth power supply path comprising a power connection connected to an external power source located outside the road construction machine, and connecting a power line between the power connection and the electrical interface.

[0058] All features disclosed in advance in connection with the road construction machine according to the invention can be used individually or together in the method according to the invention.

[0059] The road construction machine according to the first or third aspect of the invention can be manufactured or assembled using process steps of the method according to the second or fourth aspect of the invention. The method according to the second or fourth aspect of the invention can be carried out using a road construction machine according to the first or third aspect of the invention. The road construction machine according to the first aspect of the invention can be extended or combined with features of the road construction machine according to the third aspect of the invention. The road construction machine according to the third aspect of the invention can be extended or combined with features of the road construction machine according to the first aspect of the invention.

[0060] The terms "first," "second," "third," and "fourth" are simply to be understood as designations for a specific element or component and do not necessarily indicate a particular order or arrangement of the components or elements mentioned. For example, the presence of a fourth element / component does not necessarily imply the presence of a first, second, or third element / component, and vice versa.

[0061] The following are exemplary embodiments explained with reference to the figures.

[0062] This shows Fig. 1 a schematic perspective view of a road construction machine in the form of a road paver, Fig. 2 a schematic representation of a drive system of a road construction machine according to the invention, Fig. 3 a schematic representation of a primary drive system in an embodiment of an ostrich farming machine according to the invention, Fig. 4a schematic representation of a primary drive system in a further embodiment of an ostrich farm machine according to the invention, and Fig. 5 a schematic representation of a primary drive system in a further embodiment of an ostrich farming machine according to the invention.

[0063] Figure 1Figure 1 shows a perspective view from a rear angle of a road construction machine 1, which is a road paver 2 for producing a road surface ES. The road paver 2 is self-propelled. The road paver 2 comprises a chassis 3, a running gear 4, working units A, such as a material hopper 5 for receiving paving material B (asphalt mix), a screed 6 mounted on the chassis 3 in a height-adjustable manner and trailed in the direction of travel R, and a conveying unit 7 comprising a conveyor belt to supply the paving material B from the material hopper 5 of the road paver 2 to the screed 6 and a transverse distributor 8 (with a spreading auger) of the road paver 2.

[0064] The paver 2 comprises a primary drive system 9 for driving the paver's gearboxes, in particular the undercarriage 4 and / or the paving units A. The paver 2 comprises several individual drives 10, which are electrically operated. The individual drives 10 can be, for example, rotary drives for the undercarriage 4, rotary drives for the conveying unit 7, rotary drives for the distribution augers of the transverse distributor 8, linear drives for a material hopper wall cylinder, linear drives for the leveling cylinder, linear drives for raising and lowering the screed 6, linear drives for telescoping the screed 6, and rotary drives or a rotary drive system for the compaction devices of the screed 6. The paver 2 also comprises a screed heater 11.

[0065] The components of the drive system of road construction machine 1 are located in the Figure 2schematically represented. The road construction machine 1 comprises a primary drive system 9 and at least one individual drive 10. For example, the road construction machine 1 can comprise three individual drives 10, such as at least one hydraulic unit 10a for performing translational movements, at least one first electric drive 10b for performing translational movements, and at least one second electric drive 10c for performing rotational movements, as shown in Figure 2 The individual drives 10 are operated with current from the primary drive system 9. Figure 2Furthermore, a plank heater 11 is shown, which can also be operated with electricity from the primary drive system 9. The chassis 4 can also be operated with electricity from the primary drive system 9. The individual drives 10 can, in particular, drive or interact with the working units A, such as the ember bunker 5, the paving screed 6, the conveying unit 7 and / or the transverse distribution device 8.

[0066] A buffer battery 23 is arranged between the primary drive system 9 and the individual drives 10. The buffer battery 23 serves to compensate for peak loads. The buffer battery 23 allows the primary drive system 9 to be smaller. The buffer battery 23 can be a DC battery or an AC battery. A first power converter 19 can be arranged between the primary drive system 9 and the buffer battery 23. If the current (DC or AC) generated by the primary drive system 23 does not correspond to the current stored in the buffer battery 23, the first power converter 19 is required. The first power converter 19 can be a rectifier or an inverter. For example, if the primary drive system 9 generates DC current and an AC battery is used as the buffer battery 23, the first power converter 19 is an inverter.If alternating current is generated by the primary drive system 9 and a DC battery is used as a buffer battery 23, then the first power converter 19 is a rectifier. Alternatively or additionally, the first power converter 19 can include a current transformer.

[0067] A second power converter 14 can be arranged between the buffer battery 23 and the individual drives 10. If the current (direct or alternating current) stored in the buffer battery 23 does not correspond to the current required by the individual drives 10, the second power converter 14 is necessary. The second power converter 14 can be an inverter or a rectifier. Several second power converters 14 can also be arranged between the buffer battery 23 and the individual drives 10.

[0068] A power distributor 13 is arranged between the buffer battery 23 and the individual drives 10. The power distributor 13 can be arranged between the buffer battery 23 and one or more power converters 14. The power distributor 13 can be arranged between one or more power converters 14 and the individual drives 10.

[0069] An interface 12 is arranged between the primary drive system 9 and the individual drives 10. The primary drive system 9 is connected to the individual drives 10 via the interface 12. The interface 12 can be arranged between the primary drive system 9 and the buffer battery 23. The interface 12 can be arranged between the primary drive system 9 and the first power converter 19. The interface 12 can be arranged between the buffer battery 23 and the first power converter 19. The interface 12 can be arranged between the buffer battery 23 and the individual drives 10.

[0070] Figure 3 Figure 1 shows a primary drive system 9 in a first embodiment. The parallel sections are to be considered as alternatives. The primary drive system 9 comprises a fuel tank 16 or a biofuel tank 20, which supplies an internal combustion engine 17, for example, a diesel engine. The primary drive system 9 further comprises a generator 18. The internal combustion engine 17 operates the generator 18, which generates alternating current. The alternating current generated by the generator 18 is directed to the buffer battery 23. The fuel tanks 16 and 20 can be refilled on-site (operating site) by mobile fuel supply vehicles T1 (tankers). However, the fuel supply vehicles are not part of the primary drive system 9 installed in the road construction machine 1.

[0071] Alternatively, the primary drive system 9 can comprise a pressure tank 21 filled with gas, in particular natural gas or LPG, and a gas engine 22. The gas engine 22, powered by gas from the pressure tank 21, also drives the generator 18. The pressure tank 21 can be refilled on site (operating site) by mobile fuel supply vehicles T2 (tankers).

[0072] Alternatively, the primary drive system 9 can comprise a hydrogen-filled pressure tank 21 or hydrogen tank 24 and a gas engine 22. Alternatively, a tank for LOHC (liquid organic hydrogen carriers) or a tank for oxidizer (not shown) can be used. The gas engine 22, powered by hydrogen from the pressure tank 21 or hydrogen tank 24, also drives the generator 18. The pressure tank 21 can be refilled on-site (operating site) by mobile hydrogen supply vehicles T3 (tankers).

[0073] Figure 4Figure 1 shows a primary drive system 9 in a further embodiment. The parallel lines shown are to be seen as alternatives. The primary drive system 9 comprises a hydrogen-filled pressure tank 21 or hydrogen tank 24 and a fuel cell 25. Alternatively, a tank for LOHC (liquid organic hydrogen carriers) or a tank for oxidizer (not shown) can also be used. The fuel cell 25 is powered by hydrogen from the pressure tank 21 or hydrogen tank 24. The current generated by the fuel cell 25 is directed to the buffer battery 23. The hydrogen tank 24 (also the tank for oxidizer) can be refilled on-site (operating site) by mobile hydrogen supply vehicles T (tankers).

[0074] Figure 5Figure 1 shows a primary drive system 9 in a further embodiment. The primary drive system 9 can include a third rectifier 27. The third converter 27 is supplied with power from the public power grid T4. The public power grid T4 can be tapped by means of an overhead line 31, a conductor rail 32, and / or a trailing cable 33. Alternatively, a local power generation system T5, for example a wind turbine, a photovoltaic system, and / or a generator, can be used, which is connected to the third converter 27 via a trailing cable 33. Power is supplied from the third converter 27 to the buffer battery 23. Optionally, an accumulator 26 is arranged between the third converter 27 and the buffer battery 23. The third converter 27 can be a rectifier, an inverter, or a converter.

[0075] The road construction machine 1 can also be a feeder vehicle for feeding a road paver, a milling machine or a slipform paver.

Claims

1. Road construction machine (1) comprising a chassis (3), a driving gear (4), one or more working aggregates (A, 5, 6, 7, 8) for installing or removing a road surface (ES) and / or for conveying a paving material (B), one or more individual drives (10) which are adapted in particular to power the driving gear (4) and / or the working aggregates (A, 5, 6, 7, 8), a primary drive system (9) for powering the one or more individual drives (10) of the road construction machine (1), and an interface (12), wherein the interface (12) is adapted to connect the primary drive system (9) in a coupleable manner to the one or more individual drives (10), in particular to enable the one or more individual drives (10) to be supplied with power from the primary drive system (9), and the primary drive system (9) is adapted to be replaceable, characterized in that the road construction machine (1) comprises a control system, wherein the control system is adapted to recognize the type of primary drive system (9).

2. Road construction machine according to claim 1, characterized in that the primary drive system (9) has a primary drive source, wherein the primary drive source is selected from the following group: a combustion engine (17), a fuel cell (25), an accumulator (26) or an external power source (T4, T5) located outside the road construction machine (1).

3. Road construction machine according to claim 1, characterized in that a buffer battery (23), in particular a direct current battery or an alternating current battery, is arranged between the primary drive system (9) and the one or more individual drives (10).

4. Road construction machine according to claim 3, characterized in that a first converter (19), in particular a first inverter, first rectifier or first transformer, is arranged between the primary drive system (9) and the buffer battery (23).

5. Road construction machine according to claim 4, characterized in that one or more second converters (14), in particular second inverters or second rectifiers, are arranged between the buffer battery (23) and the one or more individual drives (10).

6. Road construction machine according to one of claims 3 to 5, characterized in that a power distributor (13) is arranged between the buffer battery (23) and the one or more individual drives (10), wherein the power distributor (13) is arranged in particular between the one or more second converters (14) and the buffer battery (23) or the one or more individual drives (10).

7. Road construction machine according to one of the preceding claims, characterized in that the primary drive system (9) has lifting points, in particular for a crane and / or a forklift.

8. Road construction machine according to claim 7, characterized in that the lifting points are attached to a combustion engine (17), a fuel cell (25), an accumulator (26), a fuel tank (16, 20), a pressure tank (21), a hydrogen tank (24), or any combination thereof.

9. Road construction machine according to one of the preceding claims, characterized in that the road construction machine (1) comprises several different primary drive systems (9).

10. Road construction machine according to one of the preceding claims, characterized in that the interface (12) comprises a releasable mechanical connection, a first releasable electrical connection and / or a second releasable electrical connection.

11. Road construction machine according to one of the preceding claims, characterized in that the control system is adapted to display drive-specific information to a user depending on the primary drive system (9), in particular to visualize it on an operating display.

12. Road construction machine according to one of the preceding claims, characterized in that the control system is adapted to control the road construction machine (1) depending on the primary drive system (9), in particular to control the one or more individual drives (10) of the road construction machine (1).

13. Method for assembling a road construction machine (1), comprising one or more individual drives (10), wherein the individual drives (10) are adapted for powering the road construction machine (1, 2), in particular a driving gear (4) and / or working aggregates (A, 5, 6, 7, 8) of the road construction machine (1), comprising: - coupling the one or more individual drives (10) to the driving gear and / or the working aggregates (A, 5, 6, 7, 8), - connecting the one or more individual drives (10) to an interface (12), - inserting a first primary drive system (9) into the road construction machine (1), and - connecting the first primary drive system (9) to the interface (12), - disconnecting the first primary drive system (9) from the interface (12), - removing the first primary drive system (9) from the road construction machine (1), - inserting a second primary drive system (9) into the road construction machine (1), and - connecting the second primary drive system (9) to the interface (12), characterized in that the first primary drive system (9) and the second primary drive system (9) are different in type from each other.