Road construction machine

Abstract

The utility model relates to a road construction machine (1, 2) which comprises a chassis (3), a driving gear (4), a plurality of working units (A, 5, 6, 7, 8) used for installing or removing a road surface (ES) and / or conveying paving materials (B), one or more independent drivers (10), a main driving system (9) and an interface (12), and the one or more independent drivers (10) are particularly suitable for providing power for the driving gear (4) and / or the working units (A, 5, 6, 7, 8). The main drive system (9) is used to power one or more independent drives (10) of the road construction machine (1, 2), the interface (12) is adapted to couple the main drive system (9) to the one or more independent drives (10), in particular such that the one or more independent drives (10) can be powered by the main drive system (9), and wherein the interface (12) is adapted to couple the main drive system (9) to the one or more independent drives (10). The main drive system (9) is adjusted so as to be replaceable.

Description

Technical Field

[0001] This utility model relates to a road construction machine. Background Technology

[0002] A road paver (or asphalt paver) is a type of road construction machinery primarily used for paving asphalt mixtures during road construction. The main components of a road paver typically include a drive gear, a material container (receiver or hopper), a scraper belt, a distribution screw, a screed, a heating system, and an automatic leveling system.

[0003] A diesel-hydraulic drive system for a road paver is known from EP 2 333 158 B2, wherein the energy required to operate the road paver is provided by an internal combustion engine or a diesel engine (the main drive source). EP 2 333 158 B2 further discloses that the diesel engine is directly connected to a hydraulic pump and, on the other hand, directly connected to a generator.

[0004] The use of diesel-electric drive systems in road construction machinery is also well-known. A diesel-electric drive system includes a transmission system that converts the mechanical energy provided by the diesel engine into electrical energy via a generator and transmits it to a separate electric drive unit.

[0005] In recent years, emission reduction targets have driven the electrification of road construction machinery, and road construction machinery with electric motors as its main drive source has now reached the most advanced level.

[0006] The availability of electricity or other zero-emission energy sources, as well as emission standards, vary from country to country. For road construction machinery manufacturers, producing machine types based on appropriate drive concepts is very costly, depending on each country's emission regulations and infrastructure regarding zero-emission energy. Utility Model Content

[0007] The purpose of this invention is to provide a single type of road construction machinery in which the main drive system can be easily adjusted or replaced. For example, different main drive systems may be required depending on the available energy and emission regulations of different countries.

[0008] According to a first aspect, this utility model relates to a road construction machine, including a chassis and a drive gear. The road construction machine may also include one or more work units for installing or removing road surfaces and / or for conveying paving materials. The road construction machine includes a main drive system, one or more independent drives, and an interface. The independent drives may be adapted to power the drive gear and / or the work units. The main drive system is adapted to power one or more independent drives of the road construction machine. The main drive system may be connected to one or more independent drives via the interface. In particular, this allows one or more independent drives to be powered by the main drive system. The main drive system may be adjusted to make it replaceable.

[0009] The main drive system may have a main drive source. The main drive source may be an internal combustion engine, a fuel cell, a battery, or an external power source located outside the road construction machinery.

[0010] Road construction machinery may have a buffer battery. The buffer battery can be used to compensate for load or power peaks. This allows for a smaller size of the main drive system and / or main drive source. The buffer battery can be a DC battery. The buffer battery can be an AC battery. The buffer battery can be positioned between the main drive system and one or more independent drives.

[0011] Road construction machinery may have a first converter. The first converter may be positioned between the main drive system and one or more independent drives. The first converter may be positioned between the main drive system and the buffer battery. The first converter may be positioned between the interface and the buffer battery.

[0012] The first converter can be a first inverter, a first rectifier, or a first transformer. A first converter may be needed if the current supplied by the main drive system does not match the current that the buffer battery may store or the current required by the independent drivers. For example, if the main drive system generates AC power and uses a DC battery as a buffer battery, a rectifier is needed. If the main drive system generates DC power and uses an AC battery as a buffer battery, an inverter is needed. If the voltage supplied by the main drive system does not match the voltage of the buffer battery, a transformer may be needed.

[0013] Road construction machinery may have a second converter. The second converter can be positioned between the buffer battery and one or more independent drives. A second converter is required if the current (DC or AC) stored in the buffer battery does not match the current required by the independent drives. The second converter can be an inverter. The second converter can be a rectifier. Multiple second converters can also be positioned between the buffer battery and the independent drives. A power divider can be positioned between one or more converters and the independent drives.

[0014] Road construction machinery may have a power divider. The power divider may be positioned between the buffer battery and the independent drive. Alternatively, the power divider may be positioned between the buffer battery and one or more converters.

[0015] The main drive system may have an internal combustion engine, particularly a diesel engine. The main drive system may have a fuel tank and / or a biofuel tank.

[0016] The main drive system may have a gas engine. The main drive system may have a hydrogen tank or a pressure tank, particularly a pressure tank for natural gas and / or liquefied petroleum gas.

[0017] The main drive system may have a fuel cell. The main drive system may have a hydrogen tank or a pressure tank, particularly a pressure tank for natural gas and / or liquefied petroleum gas.

[0018] The main drive system may have a battery. The main drive system may have a third converter. The third converter may be an inverter, a rectifier, or a transformer.

[0019] The main drive system may have lifting points. Lifting points can be adapted to provide application surfaces and / or application points for cranes or forklifts. Lifting points can be attached to the main drive source. Lifting points can be attached to containers of the main drive system, particularly fuel tanks, pressure tanks, and / or hydrogen tanks.

[0020] The lift point can be attached to an internal combustion engine, fuel cell, battery, fuel tank, pressure tank, hydrogen tank, or any combination thereof. For example, if the main drive system includes an internal combustion engine and a fuel tank, the lift point can be attached to both. Similarly, if the main drive system includes a gas engine and a pressure tank, the lift point can be attached to both. Finally, if the main drive system includes a fuel cell and a hydrogen tank, the lift point can be attached to both.

[0021] Road construction machinery can have different main drive systems. For example, road construction machinery can have a first main drive system and a second main drive system. The first or second main drive system may include an internal combustion engine and a fuel tank. The first or second main drive system may include a gas engine and a pressure tank. The first or second main drive system may include a hydrogen tank and a fuel cell. The first or second main drive system may include a battery and overhead lines, power rails, and / or tow cables connected to an external power source.

[0022] Different main drive systems (particularly the first and second main drive systems) can have the same dimensions. Different main drive systems (particularly the first and second main drive systems) can have a uniform hole pattern for screw and / or bolt connections. Different main drive systems (particularly the first and second main drive systems) can have a uniform locking mechanism. The uniform locking mechanism can be part of a locking system, specifically enabling the main drive systems to be connected and / or locked to road construction machinery. The locking system can be automatic and / or automatically operated. The uniform locking mechanism can be part of a snap-fit ​​connection.

[0023] The first and second main drive systems can be installed in parallel on the road construction machinery. The first and second main drive systems can be adjusted as alternative modules. Specifically, this means that if the first main drive system is installed inside the road construction machinery, the second main drive system is installed outside the road construction machinery, and vice versa.

[0024] The interface can adapt automatically. The interface may include an automatic locking and unlocking mechanism. The interface may include a releasable mechanical connection. The releasable mechanical connection may be adapted to secure the main drive system (particularly the main drive source) to the road construction machinery. The releasable mechanical connection may be adapted to be automated. The interface may include a first releasable electrical connection. The first releasable electrical connection may be adapted to electrically connect the main drive system to a buffer battery. The interface may include a second releasable electrical connection. The second releasable electrical connection may be adapted to provide electrical connection between the main drive system and the control system of the road construction machinery. The second releasable electrical connection may be adapted to enable communication between the main drive system and the rest of the road construction machinery (particularly the control system). The interface may include an automatic locking and unlocking mechanism for the releasable mechanical connection, the first releasable electrical connection, and / or the second releasable electrical connection.

[0025] Road construction machinery may include a control system. The control system may be adapted to identify the type of the main drive system, particularly the main drive source. For example, the control system may identify whether the main drive system includes an internal combustion engine, a gas engine, and / or a fuel cell, and / or whether it is connected to an external power source (e.g., a public power grid or on-site generator) by communicating with the main drive system (particularly via a second releasable electrical connection).

[0026] The control system can be adapted to display drive-specific information to the user, particularly visualizing it on an operator display, depending on the type of main drive system. If the main drive system includes tanks, such as fuel tanks, pressure tanks, and / or hydrogen tanks, the control system can be adapted to display the tank's fill status. The control system can also be adapted to display the current power of an internal combustion engine, gas engine, or fuel cell. Depending on the type of main drive system, the control system can be adapted to activate or deactivate certain functions. For example, depending on the main drive system, certain displays or buttons on the operator display may be grayed out or hidden.

[0027] This control system is applicable to controlling road construction machinery based on a main drive system. It can also be applied to controlling one or more independent drives of the road construction machinery based on a main drive system.

[0028] The independent drive can be an electric drive for performing translational and / or rotational motion or an electro-hydraulic unit for performing translational and / or rotational motion.

[0029] Road construction machinery can be a road paver. A road paver can have a material container (receiver or hopper) for receiving paving material, and working units such as material transport devices (e.g., conveyors), a distribution screw, a screed, an automatic leveling system, and one or more electrically powered heating devices. A road paver can have the following independent drives: a rotary drive for drive gears, a rotary drive for the scraper conveyor, a rotary drive for the screw, a linear drive for the hopper wall cylinder, a linear drive for the leveling cylinder, a linear drive for the lifting screed, a linear drive for the telescopic screed, and a rotary drive or rotary drive system for the compaction equipment. The screed heating system can be connected to an electrical interface.

[0030] Road construction machinery can be a material supply vehicle. A material supply vehicle is a type of road construction machinery used to supply paving materials to a road paver. For this purpose, the material supply vehicle is positioned in front of the road paver along the working direction. Such a material supply vehicle is known from EP 2 377 995 A1. A material supply vehicle typically includes a material hopper and a conveying device for transporting the paving mix from the material hopper of the material supply vehicle to the material hopper of the road paver.

[0031] Road construction machinery can include milling machines. Milling machines, or cold milling machines, are known as road construction machinery for working on roads, such as for removing road surface. Cold milling machines typically have a frame powered by a drive unit equipped with tracks or wheels. The frame carries the energy supply module, operator station, milling drum, and conveyor.

[0032] Road construction machinery can include slipform pavers. A slipform paver is a type of road construction machinery used for constructing concrete pavements. Concrete pavements have a wide range of applications, such as building highways, main roads, airport runways, container storage areas, or railway tracks. Slipform pavers can have a frame that can extend and retract in both longitudinal and lateral directions, sizing equipment (super sizing machine, transverse sizing machine), and a hydraulic unit that powers the sizing equipment.

[0033] According to a second aspect, this utility model relates to a road construction machine, including a chassis, a drive gear, multiple working units for installing or removing road surface and / or conveying paving materials, and a main drive system for providing power to the transmission of the road construction machine (particularly the drive gear and / or working units). The main drive system includes multiple independent drives for mechanical coupling with the transmission and an energy supply system for supplying current to the independent drives. At least three separate energy supply paths, each including a separate main drive source or each connected to a separate main drive source, can be integrated / can be integrated into the energy supply system, particularly integrated independently or separately from each other. The energy supply modules are supported by the chassis.

[0034] The energy supply path can be an energy supply module of the energy supply system. The structural components of the energy supply path can be temporarily integrated into the energy supply system, preferably by installation in the mounting space provided for the energy supply module.

[0035] Each of the at least three separate energy supply paths can be integrated independently and / or temporarily into the energy supply system. Multiple of the at least three independent energy supply paths can also be integrated into the energy supply system in a combined manner (particularly temporarily). All of the at least three independent energy supply paths can also be integrated into the energy supply system. Furthermore, more than three independent energy supply paths (e.g., four to six or five independent energy supply paths) can be integrated into the energy supply system.

[0036] Each of the at least three independent energy supply paths can be individually powered to supply an independent drive, and / or the main drive system may consist only of electrically operable independent drives. For an energy supply system with at least three independent energy supply paths, each path including an independent main drive source, the road construction machinery may have a mounting platform. On the mounting platform, independent mounting space can be provided for each component of the three independent energy supply paths. This allows all at least three independent energy supply paths to be accommodated simultaneously on the road construction machinery, particularly on the mounting platform, preferably connected in parallel with each other. At least three independent energy supply paths, each including an independent main drive source, can also be accommodated in the energy supply system at different times (separated from each other in time). For example, only one of the at least three independent energy supply paths can be temporarily accommodated in the mounting space of the road construction machinery, particularly in a mounting platform specifically designed for these energy supply paths (i.e., components of that energy supply path, such as fuel tanks, internal combustion engines, and generators, can be integrated into the energy supply system). The remaining mounting spaces for the other at least two energy supply paths can remain empty. As needed or based on available energy sources, the energy supply path in road construction machinery can be removed, i.e., components of that energy supply path can be removed from the machinery. Subsequently, for example, components of another of at least three additional energy supply paths can be placed in the installation space of the road construction machinery, particularly in installation platforms specifically designed for these energy supply paths (i.e., components of that energy supply path (e.g., hydrogen tanks or fuel cells) can be integrated into the energy supply system). This allows the primary drive source of the road construction machinery to be replaced. The primary drive source of the road construction machinery can be selected from different primary drive sources (e.g., internal combustion engines, fuel cells, batteries, or external power sources).

[0037] This invention offers several advantages: for example, it can reduce the number of road construction machinery types and provides a type of road construction machinery where the main drive source can be easily changed before delivery or during its service life, depending on the available or temporarily applicable energy source at the distribution destination (or, for example, according to applicable emission standards). This makes it possible to power the same road construction machinery using different main energy sources. Customers can select the drive concept or necessary energy supply path for the road construction machinery based on local applicable laws and regulations and / or resource availability.

[0038] Producing a single model for all distributed targets helps reduce the types of components and significantly lowers construction costs. In this type of road construction machinery, the energy supply system employs a modular design. Within the energy supply system, there are separate installation systems or spaces for the desired / planned main drive source (specifically, the energy supply path that includes the desired main drive source).

[0039] Another advantage of this invention is that it can provide multiple independent energy supply paths simultaneously within the same road construction machinery, each path including an independent main drive source. This allows for the independent drives to be powered simultaneously or at different times via multiple different main drive sources. Depending on requirements or local emission regulations, the independent drives may be powered solely by an emission-free main drive source (such as a fuel cell or battery, or an external power source, such as the public power grid).

[0040] The primary power source can be an internal combustion engine, such as a diesel engine, gas engine, or hydrogen engine. The internal combustion engine can have a generator or be mechanically connected to a generator. The primary power source can also be a primary battery, such as a fuel cell, a storage battery, or a regular battery. The fuel cell can be a hydrogen-oxygen fuel cell. A fuel cell converts the chemical reaction energy of a continuously supplied fuel and oxidant into electrical energy. A storage battery can be a rechargeable device that stores electrical energy based on electrochemical principles. When the storage battery discharges, the stored chemical energy is converted into electrical energy through an electrochemical redox reaction. The storage battery can be a lithium-ion battery. The term "battery" can refer to a non-rechargeable primary battery or a rechargeable secondary battery (or storage battery). The primary power source can be an external power source located outside the road construction machinery, such as a public or private power grid.

[0041] The main drive system can have an electrical interface between each individual drive and the energy supply system. Each energy supply path of the energy supply system, integrated into or capable of being integrated into the road construction machinery at a required time, can be connected to this electrical interface. In the electrical interface, the corresponding electrical connection elements of the individual drives and the energy supply paths contact each other to transmit current. Through the electrical interface, each of the individual energy supply paths can supply power to the individual drive individually or independently.

[0042] Each individual drive and / or each power supply path can be connected to an electrical interface, preferably in parallel. The individual drive can be connected downstream of the electrical interface. The power supply path can be connected upstream of the electrical interface. A switch can be connected to the electrical interface for each individual drive and / or each power supply path.

[0043] An electrical interface may include a power divider. In a power divider, the energy supply can be divided into independent circuits for each individual drive. An electrical interface may include a converter, preferably an inverter or a rectifier. A converter may include a power divider. In a converter, the current (DC or AC) supplied by each of at least three independent energy supply paths can be converted / changed. The individual drives may be powered by AC. In this case, the converter may be an inverter. An inverter can convert the DC power supplied by each of the at least three independent energy supply paths into AC power.

[0044] The first energy supply path of the energy supply system may include a first fuel tank, a first internal combustion engine, a generator, and preferably a rectifier. These components may be arranged in this order on the energy supply system to form the first energy supply path. The rectifier of the first energy supply path may be directly connected to an electrical interface or an inverter, or directly connected to a buffer battery (connected upstream of the electrical interface). The buffer battery may be used to power independent drives or compensate for different load conditions during power outages (voltage stabilization, interception of short-term load peaks). It is also conceivable that the generator of the first energy supply path is directly connected to the electrical interface, wherein the electrical interface preferably has a power divider and / or a frequency converter. The first energy supply path may have multiple fuel tanks, such as a diesel fuel tank and a biodiesel fuel tank, wherein preferably both fuel tanks are connected to an internal combustion engine or a diesel engine.

[0045] The first energy supply path of the energy supply system can have a second fuel tank and a second internal combustion engine. The second fuel tank can be a fuel gas tank, and the second internal combustion engine can be a gas engine or a hydrogen engine. Natural gas or hydrogen can be stored in the fuel gas tank. The first and second internal combustion engines can be mechanically coupled to a generator.

[0046] The second energy supply path of the energy supply system may include a hydrogen tank, preferably a separate oxidant tank and a fuel cell. The hydrogen tank and / or fuel cell may be directly connected to an electrical interface or directly connected to a buffer battery (connected upstream of the electrical interface).

[0047] The third energy supply path of the energy supply system may include a battery, preferably a replaceable battery. The battery of the third energy supply path can be directly connected to an electrical interface.

[0048] The third energy supply path may have a first power connector, which connects to an external power source located outside the road construction machinery. The power source may be a public or private power grid, or a charging vehicle equipped with an energy storage device (or battery).

[0049] The third energy supply path of the energy supply system can have a rectifier connected between the battery and the first power connector. This allows the battery to be charged.

[0050] The fourth energy supply path of the energy supply system can include: a second power connector connected to an external power source located outside the road construction machinery; and a power cable between the second power connector and the electrical interface. This allows the independent drive to be directly powered by an external power source.

[0051] One or more electric heating devices can be connected to an electrical interface so that current can be supplied by the energy supply system of the road construction machinery.

[0052] All the features disclosed above relating to the road construction machinery according to this utility model may be used individually or in combination.

[0053] The road construction machinery according to the first aspect of this utility model can be extended or combined with the features of the road construction machinery according to the second aspect of this utility model. Similarly, the road construction machinery according to the second aspect of this utility model can be extended or combined with the features of the road construction machinery according to the first aspect of this utility model.

[0054] The terms "first," "second," "third," and "fourth" should be understood as names of specific elements or components only, and do not necessarily indicate a specific order or arrangement of said components or components. For example, the presence of a fourth element / component does not necessarily imply the presence of the first, second, or third element / component, and vice versa. Attached Figure Description

[0055] The exemplary embodiments are explained below with reference to the accompanying drawings.

[0056] It shows:

[0057] Figure 1 A schematic perspective view of road construction machinery in the form of a road paver is shown.

[0058] Figure 2 A schematic diagram of the drive system of the road construction machinery according to the present invention is shown.

[0059] Figure 3 A schematic diagram of the main drive system in an embodiment of the road construction machinery according to the present invention is shown.

[0060] Figure 4 A schematic diagram of the main drive system according to another embodiment of the road construction machinery of the present invention is shown, and

[0061] Figure 5A schematic diagram of the main drive system of another embodiment of the road construction machinery according to the present invention is shown. Detailed Implementation

[0062] Figure 1 The diagram shows a rearward perspective view of a road construction machine 1, which is a road paver 2 used for installing pavement ES. The road paver 2 is self-propelled. The road paver 2 includes a chassis 3, a drive gear 4, a work unit A, such as a material hopper 5 for receiving paving material B (asphalt mixture), a height-adjustable screed 6 mounted on the chassis 3 and pulled along the travel direction R, and a conveyor unit 7 with a conveyor belt for supplying paving material B from the material hopper 5 of the road paver 2 to the screed 6, and to a lateral distribution device 8 (with a distribution screw) of the road paver 2.

[0063] The road paver 2 includes a main drive system 9 for powering the gears of the road paver 2 (particularly the drive gear 4 and / or the working unit A of the road paver 2). The road paver 2 includes multiple independent drives 10, which can be electrically driven. The independent drives 10 may be, for example, rotary drives of the drive gear 4, rotary drives of the conveying unit 7, rotary drives of the distribution screw of the lateral distribution device 8, linear drives of the hopper wall cylinder, linear drives of the leveling cylinder, linear drives of the lifting screed 6, linear drives of the telescopic screed 6, and rotary drives or rotary drive systems of the compaction device of the screed 6. The road paver 2 also includes a screed heating system 11.

[0064] Figure 2 The components of the drive system of road construction machinery 1 are schematically shown. Road construction machinery 1 includes a main drive system 9 and at least one independent drive 10. For example, road construction machinery 1 may include three independent drives 10, such as at least one hydraulic unit 10a for performing translational motion, at least one first electric drive 10b for performing translational motion, and at least one second electric drive 10c for performing rotary motion, as shown below. Figure 2 As shown. The independent drive 10 is powered by the main drive system 9 for operation. Figure 2 A heating system 11 for the ironing board is also shown, which can also be operated using power from the main drive system 9. The drive gear 4 can also be operated using power from the main drive system 9. In particular, the independent drive 10 can power or interact with the work unit A (e.g., material hopper 5, ironing board 6, conveying unit 7 and / or lateral distribution device 8).

[0065] A buffer battery 23 is disposed between the main drive system 9 and the independent driver 10. The buffer battery 23 is used to compensate for load peaks. The buffer battery 23 allows for a smaller size of the main drive system 9. The buffer battery 23 can be a DC battery or an AC battery. A first converter 19 can be disposed between the main drive system 9 and the buffer battery 23. The first converter 19 is required if the current (DC or AC) generated by the main drive system 23 does not correspond to the current stored in the buffer battery 23. The first converter 19 can be a rectifier or an inverter. For example, if DC power is generated by the main drive system 9 and an AC battery is used as the buffer battery 23, then the first converter 19 is an inverter. If AC power is generated by the main drive system 9 and a DC battery is used as the buffer battery 23, then the first converter 19 is a rectifier. Alternatively or additionally, the first converter 19 may include a transformer.

[0066] The second converter 14 can be mounted between the buffer battery 23 and the independent driver 10. The second converter 14 is required if the current (DC or AC) stored in the buffer battery 23 does not correspond to the current required by the independent driver 10. The second converter 14 can be an inverter or a rectifier. Multiple second converters 14 can also be arranged between the buffer battery 23 and the independent driver 10.

[0067] A power divider 13 is arranged between the buffer battery 23 and the independent driver 10. The power divider 13 may be arranged between the buffer battery 23 and one or more converters 14. The power divider 13 may be arranged between one or more converters 14 and the independent driver 10.

[0068] An interface 12 is arranged between the main drive system 9 and the independent driver 10. The main drive system 9 can be coupled to the independent driver 10 via the interface 12. The interface 12 can be arranged between the main drive system 9 and the buffer battery 23. The interface 12 can be arranged between the main drive system 9 and the first converter 19. The interface 12 can be arranged between the buffer battery 23 and the first converter 19. The interface 12 can be arranged between the buffer battery 23 and the independent driver 10.

[0069] Figure 3The main drive system 9 in the first embodiment is shown. Parallel lines can be considered an alternative. The main drive system 9 includes a fuel tank 16 or a biofuel tank 20, which supplies fuel to an internal combustion engine 17 (e.g., a diesel engine). The main drive system 9 also includes a generator 18. The internal combustion engine 17 drives the generator 18, which generates alternating current (AC). The AC power generated by the generator 18 is delivered to a buffer battery 23. The fuel tanks 16, 20 can be refilled on-site (at the work site) by a mobile fuel supply vehicle T1 (tanker truck). However, the fuel supply vehicle is not part of the main drive system 9 mounted on the road construction machinery 1.

[0070] Alternatively, the main drive system 9 may include a pressure tank 21 filled with gas (particularly natural gas or liquefied petroleum gas) and a gas engine 22. The gas engine 22, which operates using gas from the pressure tank 21, also drives the generator 18. The pressure tank 21 can be refilled on-site (at the operation site) by a mobile fuel supply vehicle T2 (tanker truck).

[0071] Alternatively, the main drive system 9 may include a pressure tank 21 or a hydrogen tank 24 filled with hydrogen and a gas engine 22. Alternatively, an LOHC (liquid organic hydrogen carrier) tank or an oxidizer tank (not shown) may be used. The gas engine 22, powered by hydrogen from the pressure tank 21 or the hydrogen tank 24, also powers the generator 18. The pressure tank 21 can be refilled on-site (at the operation site) by a mobile hydrogen supply vehicle T3 (tanker truck).

[0072] Figure 4 A main drive system 9 in another embodiment is shown. Parallel lines can be considered as alternatives. The main drive system 9 includes a pressure tank 21 or hydrogen tank 24 filled with hydrogen and a fuel cell 25. Alternatively, an LOHC (liquid organic hydrogen carrier) tank or an oxidizer tank (not shown) may also be used. The fuel cell 25 is powered by hydrogen from the pressure tank 21 or hydrogen tank 24. The electricity generated by the fuel cell 25 is delivered to a buffer battery 23. The hydrogen tank 24 (which may also be an oxidizer tank) can be refilled on-site (at the operating site) by a mobile hydrogen supply vehicle T (tanker truck).

[0073] Figure 5A main drive system 9 is shown in another embodiment. The main drive system 9 may include a third rectifier 27. The third converter 27 is powered by a public power grid T4. The public power grid T4 may be connected via an overhead power line 31, a power rail 32, and / or a tow cable 33. Alternatively, a local power generation T5, such as a wind turbine, photovoltaic system, and / or generator, may be used, connected to the third converter 27 via the tow cable 33. Power is conducted from the third converter 27 to a buffer battery 23. Optionally, a storage battery 26 is also arranged between the third converter 27 and the buffer battery 23. The third converter 27 may be a rectifier, an inverter, or a transformer.

[0074] Road construction machinery 1 can also be a material supply vehicle used to supply materials to road pavers, milling machines or slipform pavers.

Claims

1. A road construction machine (1), comprising: Chassis (3); as well as Drive gear (4), One or more work units (A, 5, 6, 7, 8) for installing or removing pavement (ES) and / or for conveying paving materials (B), One or more independent drives (10) adapted to power the drive gear (4) and / or the working units (A, 5, 6, 7, 8), The main drive system (9) provides power to one or more independent drives (10) of the road construction machinery (1), and Interface (12), Its features are, The interface (12) is adapted to couple the main drive system (9) to one or more independent drives (10) in a coupled manner, and The main drive system (9) was modified to make it replaceable.

2. The road construction machinery according to claim 1, characterized in that, The interface (12) is adapted to couple the main drive system (9) to one or more independent drivers (10) such that the one or more independent drivers (10) can be powered by the main drive system (9).

3. The road construction machinery according to claim 1, characterized in that, The main drive system (9) has a main drive source, wherein the main drive source is selected from the group consisting of an internal combustion engine (17), a fuel cell (25), a storage battery (26), or an external power source (T4, T5) located outside the road construction machinery (1).

4. The road construction machinery according to claim 1, characterized in that, A buffer battery (23) is arranged between the main drive system (9) and one or more independent drives (10).

5. The road construction machinery according to claim 4, characterized in that, The buffer battery (23) is a DC battery or an AC battery.

6. The road construction machinery according to claim 4, characterized in that, A first converter (19) is arranged between the main drive system (9) and the buffer battery (23).

7. The road construction machinery according to claim 6, characterized in that, The first converter (19) is a first inverter, a first rectifier, or a first transformer.

8. The road construction machinery according to claim 4, characterized in that, One or more second converters (14) are arranged between the buffer battery (23) and one or more independent drivers (10).

9. The road construction machinery according to claim 8, characterized in that, One or more of the second converters (14) are second inverters or second rectifiers.

10. The road construction machinery according to claim 6, characterized in that, One or more second converters (14) are arranged between the buffer battery (23) and one or more independent drivers (10).

11. The road construction machinery according to claim 10, characterized in that, One or more of the second converters (14) are second inverters or second rectifiers.

12. The road construction machinery according to any one of claims 4 to 11, characterized in that, A power divider (13) is arranged between the buffer battery (23) and one or more independent drivers (10).

13. The road construction machinery according to claim 12, characterized in that, The power divider (13) is arranged between one or more second converters (14) and the buffer battery (23) or one or more independent drivers (10).

14. The road construction machinery according to any one of claims 1 to 11, characterized in that, The main drive system (9) has a boost point.

15. The road construction machinery according to claim 14, characterized in that, The main drive system (9) has lifting points for cranes and / or forklifts.

16. The road construction machinery according to claim 14, characterized in that, The lifting point is attached to an internal combustion engine (17), a fuel cell (25), a storage battery (26), a fuel tank (16, 20), a pressure tank (21), a hydrogen tank (24), or any combination thereof.

17. The road construction machinery according to any one of claims 1 to 11, characterized in that, The road construction machinery (1) includes multiple different main drive systems (9).

18. The road construction machinery according to any one of claims 1 to 11, characterized in that, The interface (12) includes a releasable mechanical connection, a first releasable electrical connection and / or a second releasable electrical connection.

19. The road construction machinery according to any one of claims 1 to 11, characterized in that, The road construction machinery (1) includes a control system, wherein the control system is adapted to identify the type of the main drive system (9).

20. The road construction machinery according to claim 19, characterized in that, The main drive system (9) displays drive-specific information to the user.

21. The road construction machinery according to claim 20, characterized in that, The driver-specific information is visualized on the operating display.

22. The road construction machinery according to claim 19, characterized in that, The control system is adapted to control the road construction machinery (1) according to the main drive system (9).

23. The road construction machinery according to claim 22, characterized in that, The control system is adapted to control one or more independent drives (10) of the road construction machinery (1).

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