STRASSENFERTIGER

Description

[0001] The present invention relates to a road construction machine with a fresh air device according to claim 1.

[0002] It is known that extraction systems are used on road construction machines, in particular on road pavers, for laying a new asphalt layer. These extraction systems extract vapors generated, in particular, from an auger chamber positioned in front of the paving screed during the transverse distribution of the hot paving material and expel them above the operator's control station of the road paver. Such an extraction system is disclosed in EP 0 843 044 A1.

[0003] This extraction system extracts fumes only from the auger chamber between the rear wall of the machine and the front wall of the screed. As the screed extends, the material supply in front of the screed is also "extended" and is now located next to the machine and thus outside the area covered by the extraction system. This causes fumes to enter the area of ​​an external control station on the screed, where an operator is located during the paving of the new asphalt surface.

[0004] Furthermore, road pavers also generate fumes in the area of ​​the material hopper, where the hot paving material is stored, to which the road paver operator is particularly exposed. To extract these fumes, EP 0 843 044 A1 proposes an additional extraction device. This extraction device also expels the fumes extracted from the material hopper above the roof. However, even with this device, it may not be possible to extract all of the fumes from the material hopper, and thus some of them may be drawn into the area of ​​the operator's control station, where the road construction machine operator is positioned.

[0005] DE 10 2020 123 723 A1 discloses a road paver with an operator's station, which has an air nozzle unit configured to generate an air curtain around the operator's station. The air nozzle unit can be integrated into a roof of the operator's station. The air nozzle unit is intended to form an air wall from the roof, from top to bottom, along an open side of the operator's station.

[0006] The extraction / blower systems described above require significant design effort, primarily due to their integrated construction. This results in different extraction / blower systems for different machine types. This results in various custom designs across different series, increasing manufacturing costs. CN 211 571 280 U discloses a road paver with a fresh air system attached to the roof of the operator's control station. However, this device has the disadvantage that it can only clean contaminated air accumulated below the roof, meaning that the operator positioned below it will most likely benefit only to a limited extent.

[0007] DE10 2017 001202 A1 discloses a fresh air device that can be used inside and outside a motor vehicle.

[0008] KR 2013 0142451 A discloses a pivoting fresh air device for attachment to a center console of a motor vehicle.

[0009] WO 2021 / 252001 A1 discloses a fresh air device for attachment to a stroller or to the edge of a table.

[0010] The object of the invention is to provide a road construction machine with inexpensive, versatile and effective means for improving the air quality in the area of ​​the road construction machine's operating personnel.

[0011] This object is achieved by means of a road construction machine according to claim 1. Advantageous further developments of the invention are given by the respective subject matters of the subclaims.

[0012] The invention relates to a road construction machine configured in the form of a road paver or a feeder vehicle for a road paver. The road construction machine comprises a fresh air device for a driver's control panel of a driver's control station of the road construction machine that is open at least laterally or for an external control console of the road construction machine. The fresh air device according to the invention comprises at least one blower unit for generating an air flow, at least one filter unit for filtering the air flow generated by the blower unit, and an air output unit that has at least one air outlet opening for the filtered air flow.

[0013] According to the invention, the fresh air device is designed as a modular attachment configured for detachable attachment to the driver's control panel or the external control console. Thus, the fresh air device according to the invention can be used as a standalone functional unit, i.e., independently of the operation of a blower and / or suction unit integrated into the road construction machine, particularly used to extract vapors from the auger chamber, to generate the fresh air flow. Compared to such blower and / or suction units already integrated into the road construction machine, the fresh air device according to the invention forms a self-contained add-on module that can be easily mounted by the operator on the construction site, regardless of the road construction machine type, i.e., across all series, on the driver's control panel or the external control console.This means that the fresh air device according to the invention can be used as a self-sufficient add-on module on various road construction machines as standard, i.e. it is versatile in its use, as a result of which manufacturing costs for different series can also be reduced.

[0014] The fresh air system according to the invention forms a standard and retrofit module that can be attached to various machine types and, despite its standardized, modular design, has high potential for customized use on road construction machines. In particular, thanks to its modular design and its autonomous operation, the fresh air system according to the invention can be individually adjusted by the operator without having to adjust the components integrated into the machine. In principle, it is possible to set up independent operation between the fresh air system according to the invention and other machine components, i.e., to run them in isolation from one another.

[0015] Furthermore, the fresh air system according to the invention can be easily removed from the road construction machine as a whole, i.e., as a modular assembly, due to its detachable fastening. For example, the fresh air system can be removed overnight, during transport, or for service and / or cleaning purposes in just a few simple steps.

[0016] The fresh air device according to the invention forms a compact module, especially as a modular attachment, which can be attached to the road construction machine in a compact design in a clearly visible manner, which also allows its functionality to be easily checked.

[0017] Because the fresh air device according to the invention can be detachably attached to the driver's control panel or the exterior control console, in particular directly to a control unit used by the driver or operator, the fresh air generated by the fresh air device is made available precisely where it is needed by the driver or operator. This improves air quality directly at the driver's or operator's location.

[0018] The blower unit preferably has a radial fan. This can draw in air axially along its motor axis and expel the air at an angle of 90°. Such a radial fan is highly efficient and is particularly suitable for upstream and / or downstream units that operate with increased compression or air pressure, such as an upstream filter. Furthermore, the radial fan is suitable for quiet operation. It would be conceivable for the blower unit to have an axial fan instead of the radial fan. Due to its functionality of drawing in air axially and expelling it axially, this offers potential for an advantageous structural design.

[0019] One variant involves the blower unit being equipped with an electric motor, specifically a speed-adjustable electric motor. The motor could be equipped with its own speed control module, allowing for even better individual adjustment of the blower unit's independent operation.

[0020] According to one embodiment of the invention, the blower unit is connectable to a power source of the road construction machine. It would be conceivable for the fresh air device to have a power plug that can be connected to a socket mounted on the road construction machine to supply the blower unit with power.

[0021] Preferably, the fresh air system has at least one dedicated battery, for example, a lithium-ion battery, for operating the blower unit. In terms of power supply, the fresh air system would thus be completely self-sufficient. One variant provides for the battery to be charged using the power source of the road construction machine.

[0022] According to an advantageous embodiment of the invention, the air dispensing unit comprises at least one control element for adjusting the speed of the blower unit. It would be conceivable for at least one function of the fresh air device, in particular the speed of the blower unit, to be controllable via a user interface of the driver's control panel or via a user interface of the external control console, for example, via a Wi-Fi, Ethernet, and / or Bluetooth connection that can be established between the fresh air device and the driver's control panel or the external control console.

[0023] In this context, it would be possible to dynamically control the speed of the blower unit's electric motor depending on one or more measured process values ​​during operation of the road construction machine. This function could be accessed, for example, via the user interface of the driver's control panel or the user interface of the external control console. However, dynamic speed control could also be accessed directly on the fresh air system.

[0024] A simple variant provides for at least two power levels for operating the blower unit to be activated directly on the fresh air system. It would be conceivable to equip the fresh air system with its own control module. This control module could include a display for displaying the set operating parameters of the fresh air system. According to a particular embodiment, the display is configured as a touchscreen for controlling and / or monitoring the operation of the fresh air system.

[0025] According to one embodiment, a driver or operator could control the fresh air system using a mobile device, for example, a smart device. The smart device can be a smartphone, tablet PC, wearable, and / or data glasses.

[0026] According to one embodiment of the invention, the fresh air device is configured for networked operation with at least one other add-on module attached to the road construction machine, for example, with a thermography module and / or a weather module. In particular, it would be possible for the speed control of the fan unit to be dependent on at least one process value measured on the other add-on module. For example, the temperature of the fresh air flow can be dynamically adjusted depending on an ambient temperature of the road construction machine measured by the weather module. A heating / cooling element integrated into the fresh air device could be used for this purpose.

[0027] According to one variant of the invention, the filter unit is positioned upstream of the blower unit in the direction of flow. This cleans the air drawn in by the blower unit before it passes through the blower unit, thus providing better protection against contamination. This variant is particularly suitable in conjunction with a radial fan because, on the one hand, the filter unit can be easily integrated into its axial air flow and, on the other hand, high filtration is also possible. Alternatively, it would also be conceivable to position the filter unit or another filter unit downstream of the blower unit in the direction of flow. This variant would be particularly suitable if the blower unit is configured as an axial fan.

[0028] A conceivable variant would be one in which the blower unit is positioned between at least one upstream coarse filter unit and at least one downstream fine filter unit. This would achieve several positive effects at once. The upstream coarse filter(s) ensure gentle operation of the blower unit, and the downstream fine filter(s) ensure optimal air quality.

[0029] The filter unit preferably has a filter housing for accommodating at least one replaceable filter element. Generally, it would be conceivable to equip the fresh air system with an operating hours counter or at least to functionally connect it to one. Depending on the operating hours counter reached, an operator or driver can be prompted to perform service or cleaning intervals, for example, to replace the filter element installed in the filter housing with a new one.

[0030] According to one variant of the invention, the filter element is an activated carbon filter. Preferably, two filter elements designed as activated carbon filters are positioned one behind the other in the filter housing. This allows for particularly effective filtering of bitumen-containing vapors from the air. A conceivable arrangement would be one in which two filter elements designed as activated carbon filters are positioned upstream of the blower unit in series, and at least one further filter element designed as an activated carbon filter is positioned downstream of the blower unit.

[0031] It would be advantageous if the filter unit for the filter housing provided at least one housing expansion stage, by means of which at least one additional filter element, for example, an activated carbon filter, could be accommodated. This would make it possible to create a housing volume in which several filter elements can be accommodated. The filter elements are preferably positioned one behind the other in the direction of flow within the expanded filter housing. This allows for even better filtering of contaminants from the intake air. The filter elements arranged one behind the other can even have different filter properties, in particular, form increasingly fine filtration stages.

[0032] In particular, the housing expansion stage could be configured to accommodate, in addition to the further filter element(s), at least one other front-end unit or front-end component, for example a dust guard and / or a protective grille.

[0033] It would be conceivable for the filter housing, including any housing extensions provided for it, to be made primarily of plastic. This would benefit a lightweight construction. In particular, the filter housing could be assembled from several plastic shells.

[0034] According to one variant, the filter housing, especially together with the attached housing extension, can be assembled without tools, for example, using quick-release fasteners. Replacing the filter element(s) contained therein can thus be carried out effortlessly on-site by the driver or operator, i.e., with just a few simple steps on the construction site.

[0035] The air output unit preferably has a mounting plate to which the blower unit and / or the filter unit are attached. The blower unit and the filter unit can be arranged on opposite sides of the mounting plate. The mounting plate forms a stable mounting base for the blower unit and / or the filter unit, to which the blower unit and the filter unit can be stably aligned, in particular, with respect to one another.

[0036] A particularly preferred variant provides that the air dispensing unit has a first bracket for detachably attaching the fresh air device to the driver's control panel or to the external control console, which first bracket, together with the mounting plate, is also intended to form a fan housing for the blower unit. The first bracket therefore fulfils a dual function, as it serves both to detachably attach the fresh air device and to form the fan housing within the air dispensing unit. For its actual fastening function, the first bracket has a first section that protrudes from the air dispensing unit. For its housing function, i.e. to form the fan housing, the first bracket has a second section that is positioned within the air dispensing unit in order to be fastened to the mounting plate at a distance from the latter.This results in a very stable structure, so that even a high-speed blower unit can be securely attached to the driver's control panel or the external control console.

[0037] According to one embodiment of the invention, the first holder is detachably connected to a second holder that can be fastened to the driver's control panel or to the external control console. The second holder can itself be detachably fastened to the driver's control panel or to the external control console. In particular, the second holder has an upper section that is connected to the external section of the first holder, for example, is screwed to it. The upper section of the second holder can be connected to a lower section of the second holder by a step shape, in particular is formed integrally with the step shape. The lower section of the second holder has a receiving base by means of which the second holder can be fastened to the substructure of the driver's control panel or to the substructure of the external control console.

[0038] It is advantageous if a connection point formed between the first bracket and the second bracket is mounted above the driver's control panel or the external control console, so that it is freely accessible to the operator. In other words, in this variant, the coupling point at which the outer section of the first bracket is connected to the upper section of the second bracket is located above the driver's control panel or the external control station in such a way that a driver or operator can easily reach the coupling point with tools, such as a wrench, in order to install or remove the fresh air system on the driver's control panel or the external control console.

[0039] It is particularly practical if the air flow drawn through the filter unit by the blower unit can be distributed as filtered fresh air by the blower unit to at least two flow channels formed within the air dispensing unit. Through these channels, the fresh air can be transported to different locations on the driver's control panel or the external control console and flow out of the air dispensing unit to improve the air quality in this area for the driver or operator.

[0040] It would be conceivable that the air flow sucked in by the blower unit through the filter unit is passed on by the blower unit as a filtered fresh air flow through a single flow channel connected to the blower unit to the outlet opening.

[0041] One variant provides for the fresh air system to have several blower units, each with a separate flow channel. In other words, in this variant, the air flow emitted by each blower unit is not split, but is transported entirely via a flow unit connected to the blower unit.

[0042] In order to achieve an advantageous distribution of fresh air at the driver's control panel or at the external control station, the flow channels can transport fresh air in particular in opposite directions in order to expel it at the external ends through outlet openings formed thereon.

[0043] A particularly advantageous design is achieved by utilizing the inner section of the first bracket to form the two flow channels, at least in part. This allows the first bracket to be used in a particularly versatile manner on the fresh air system.

[0044] The air dispensing unit preferably comprises a cover for covering the flow channels. It is possible for the cover, together with other components forming the flow channel(s), for example, with the inner portion of the first holder, to enclose a cavity in which electronic components may be accommodated. This allows the electronic components to be stored in isolation from the fresh air flow, i.e., remain largely unaffected by it. Nevertheless, it would be possible to guide the generated fresh air flow within the air dispensing unit in such a way that the electronic components positioned in the cavity can be cooled.

[0045] One embodiment of the invention provides for the respective air outlet opening to have adjustable louvers. This allows the driver or operator to adjust the flow direction of the fresh air stream. According to one embodiment, the louvers could also be configured to adjust the air volume flow.

[0046] It would be practical if the fresh air system were mounted on the driver's control panel or the external control console in such a way that the air outlet opening formed thereon is positioned next to a control surface of the driver's control panel or the external control console. This ensures an integrated design, at least visually, so that the driver's control panel and the fresh air system mounted thereon, or the external control console with the fresh air system mounted thereon, create a visually seamless structure.

[0047] According to one variant of the invention, the fresh air device is configured for tool-free assembly and disassembly. For example, the outer section of the first bracket, together with the upper section of the second bracket, forms a quick-release fastener, e.g., a toggle lever, bayonet, or magnetic closure. A combination of positive and non-positive locking would also be conceivable to provide a quick-release fastener.

[0048] In particular, the fresh air device is designed to generate a temperature-controlled fresh air flow. For this purpose, at least one heating and / or cooling element can be arranged in the respective flow channels, which brings the fresh air flow to a desired temperature before it leaves the air output unit. In this context, it would be expedient for at least one Peltier element to be provided in the respective flow channels in order to bring the fresh air flow conveyed therein to a desired temperature. It would be conceivable for the respective Peltier elements to be dynamically controlled based on a process parameter recorded on the road construction machine, for example, regulating the fresh air flow to a desired temperature level depending on a recorded ambient temperature of the road construction machine.

[0049] In particular, the detachable attachment of the fresh air device according to the invention to the driver's control panel or to the external control console can be designed in such a way that the fresh air device moves together with the driver's control panel when it is adjusted, for example, when the driver's control panel is moved transversely to the direction of travel of the road construction machine. This means that the fresh air device moves along with the driver's control panel or the external control console, in order to always supply the driver or operator with fresh air. In particular, it is possible for the fresh air device attached to the driver's control panel or the external control console to be pivotable, tiltable, and / or displaceable together with the driver's control panel or the external control console, meaning that the fresh air device benefits from the structural mounting of the driver's control panel or the external control console.

[0050] The invention relates to a road construction machine configured in the form of a road paver or a feeder vehicle for a road paver, wherein at least one fresh air device is detachably attached to the road construction machine as a modular attachment. The fresh air device is available as an attachment kit and can be mounted, in particular, across various road paver and feeder vehicle types across model series.

[0051] The road construction machine preferably comprises a driver's control station that is open at least on the sides, i.e., not a closed cabin structure. One variant provides for the fresh air device to be attached to the driver's control panel of the open-configured driver's control station and / or to an external control station of the road construction machine. The fresh air device is thus used on the road construction machine at a location that is not isolated from the environment. The fresh air device on the road construction machine therefore contributes to additionally supplying fresh air to the workplace, which is already ventilated by the ambient air—i.e., the driver's control station or the external control station.

[0052] Embodiments of the invention are explained in more detail using the following figures. They show: Figure 1a road construction machine configured as a road finisher, Figure 2an external control console of a road finisher made of Figure 1present external control station of the screed in an isolated representation, Figure 3 a road construction machine configured as a feeder vehicle in a perspective view, Figure 4 a driver's control panel in an isolated representation with a detachably attached fresh air device, Figure 5 the assembly of Figure 4 in perspective view from behind Figure 6 a side view of the driver's control panel with attached fresh air device, Figure 7 the fresh air device in isolated view, Figure 8 the fresh air device from Figure 7 without cover, Figure 9 the fresh air device insulated, in perspective view from behind, Figure 10 a side view of the fresh air device, Figure 11 a sectional view through the fresh air device, Figure 12 an external control panel according to Figure 2with fresh air device attached thereto from a first perspective, and Figure 13 the external control panel with fresh air device attached thereto from a rear view.

[0053] Identical technical components are provided with the same reference symbols throughout the figures.

[0054] Figure 1 shows a road construction machine 1 in the form of a road paver 2. The road paver 2 has a material hopper 3 in which bituminous paving material E can be stored, which can be processed into a new road surface by means of a paving screed 4 towed by the road paver 2. While the road paver 2 travels in the direction of travel R to lay the new road surface, the paving material E is conveyed by means of a Figure 1not shown longitudinal conveyor device out of the material hopper 3, against the direction of travel R to a further not shown, transverse distribution auger, which spreads the paving material E in front of the paving screed 4.

[0055] The road paver 2 comprises an open-plan operator control station 5, on which a driver's seat 6 for a driver of the road paver 2 is positioned. A driver's control panel 7 is mounted in front of the driver's seat 6 in the direction of travel R. The driver's control panel 7 provides the driver with a user interface 8, by means of which the driver can control the operation of the road paver 2, in particular control and / or monitor processes taking place thereon. Figure 1The driver control panel 7 shown can be adjusted along a guide track 9 transversely to the direction of travel R. For this purpose, the driver control panel 7 forms a suitable carriage, which can be moved along the guide track 9 and fixed along it at a desired position for the driver.

[0056] Furthermore, Figure 1 that an external control station 10 is provided on each of the outer sides of the paving screed 4. An external control console 11 is attached to the external control station 10, by means of which an operator walking alongside the paving screed 4 can control and / or monitor the operation of the screed 4. In particular, the operation of the units installed in the paving screed 4, for example, settings of the compressor units and / or heating devices operating therein, can be monitored by means of the external control console 11.

[0057] Figure 2 shows the external control panel 11 in an isolated view. The external control panel 11 from Figure 2 has a user interface 12 with several buttons 13 and a display 14 for displaying process parameters set on the screed 4.

[0058] Figure 3 shows a feeder vehicle 15. Such a feeder vehicle 15 can be used during the production of a new paving layer in front of the Figure 1 shown road paver 2 and supply it with paving material E. The feeder vehicle 15 has a material hopper 16, from which the paving material E can be transported by means of a longitudinal conveyor device 17 into the material hopper 3 of the road paver 2 traveling behind in the direction of travel R.

[0059] The feeder vehicle 15 has an open driver's control station 18, on which a driver's seat 60 and a driver's control panel 19 mounted in the direction of travel R in front of the driver's seat 60 are provided. The driver's control panel 19 can approximately have the structural dimensions of the driver's control panel 7 of the road paver 2 from Figure 1 A user interface provided on the driver's control panel 19 is, of course, configured with regard to the functions of the feeder vehicle 15.

[0060] Figure 4 shows in isolated representation the driver's control panel 7 of the road paver 2 with a detachably mounted fresh air device 20. Instead of the driver's control panel 7, the driver's control panel 19 of the feeder vehicle 15 could also be used as a fastening point for the detachable attachment of the fresh air device 20. In addition, the external control panel 11 of Figure 2The fresh air system 20 may then have a design adapted to the external control panel 11.

[0061] The fresh air facility 20 is located in Figure 4 as a modular attachment M for detachable attachment to the driver's control panel 7, i.e. it could also be easily removed from the driver's control panel 7 without affecting the functionality of the driver's control panel 7.

[0062] The fresh air device 20 from Figure 4 comprises an air dispensing unit 21 with a cover 22. The air dispensing unit 21 has two air outlet openings 23a, 23b through which fresh air flows into the area of ​​the driver, who is positioned in front of the driver control panel 7. The strength of the fresh air flow provided from the air outlet openings 23a, 23b can be adjusted by means of a control element 24 formed in the cover 22. Furthermore, Figure 4The air outlet openings 23a, 23b each have slats 25a, 25b, which serve to adjust the flow direction of the fresh air. If necessary, the slats 25a, 25b could be designed to adjust the air volume flow generated by the air outlet openings 23a, 23b.

[0063] In Figure 4It is shown that the cover 22 of the air dispensing unit 21 forms a recess 26a above the air outlet opening 23a and a further recess 26b below the air outlet opening 23b. The respective recesses 26a, 26b ensure a compact design of the air dispensing unit 21. In particular, the recess 26b allows the driver a good view of the display 27 formed below it on the driver's control panel 7 in order to be able to monitor the process parameters of the road construction machine 1 set thereon. The recess 26a allows the driver a better view over the air dispensing unit 20, for example, to monitor the material fill level in the material hopper 3 of the road paver 2.

[0064] Figure 5 shows the Figure 4 The illustrated installation of the modular fresh air system 20 on the driver's control panel 7 from a rear perspective. The fresh air system 20 from Figure 5has a filter unit 28, which is attached to the rear of the air output unit 21 on a mounting plate 29 positioned thereon. The filter unit 28 has a filter housing 30 in which a filter element 31 is accommodated. Furthermore, Figure 5 that the mounting plate 29 forms lateral projections 32a, 32b.

[0065] Figure 6 shows a side view of the modular assembly from Figure 5 . The air output unit 21 has a first holder 33 (see Figure 11 ) with an outer section 34 which is screwed to an upper section 35 of a second holder 36. A connection point 37 formed between the outer section 34 of the first holder 33 and the upper section 35 of the second holder 36 is located, as is particularly shown in Figure 4As can be seen, it is freely accessible to the driver above the driver control panel 7, allowing him to easily attach or remove the fresh air device 20 from the driver control panel 7. The second bracket 36 can remain on the driver control panel 7 or can also be removed from the driver control panel 7.

[0066] Furthermore, Figure 6 The upper section 35 of the second bracket 36 is connected to a lower section 39 by means of a stepped shape 38. The upper section 35, the stepped shape 38, and the lower section 39 can be integrally manufactured molded components, for example, bent from a sheet metal blank. A receiving base 40 is formed on the lower section 39, which corresponds to the structural design of a substructure 41 formed on the driver's control panel 7, in order to be attached thereto in a form-fitting manner.

[0067] Figure 7shows the fresh air device 20 including the second bracket 36 attached to it in an isolated view. In this configuration, or alternatively without the second bracket 36, the fresh air device 20 is present as a modular attachment M, which can be easily attached and removed, in particular, to various road paver types using a driver's control panel 7 provided thereon in order to supply the driver with fresh air. Even if the respective road paver types have slightly different driver's control panels 7, the second bracket 40 could be adapted accordingly, so that the essential structure of the fresh air device 20 can be used as a standard attachment across all model series.

[0068] Figure 8 shows the fresh air device 20 from Figure 7 without cover 22. Figure 8shows that a fan unit 42 is arranged on a side of the mounting plate 29 facing away from the filter unit 28. The fan unit 42 is in the form of a radial fan 43.

[0069] The radial fan 43 is surrounded by fresh air guide profiles 44a, 44b positioned on the mounting plate 29. An air flow 45 (see Figure 11 ) is supplied by the radial fan 43 as a filtered fresh air stream 46a, 46b to the Figure 8 The fresh air flow 46a, 46b is distributed radially through the two flow channels 47a, 47b shown. The fresh air flow 46a, 46b exits through the two air outlet openings 23a, 23b into the area of ​​the driver's control station 5 of the road paver 2, thereby improving the air quality on the control station 5 for the driver.

[0070] According to Figure 8the two air outlet openings 23a, 23b are formed in respective plate parts 48a, 48b, which are integrated in the cover 22 in the assembled state of the fresh air device 20 (see Figure 11 ).

[0071] Figure 9 basically shows the representation of Figure 5 only without driver control panel 7. Figure 9 therefore shows the fresh air device 20 in an isolated view from behind.

[0072] Figure 10 basically shows the representation of Figure 6 only without driver control panel 7, whereby the fresh air device 20 is shown in side view.

[0073] Figure 11 shows a sectional view of the fresh air system 20. In Figure 11It can be seen that the filter housing 30 accommodates both a first filter element 49a and a second, further filter element 49b. The two filter elements 49a, 49b are arranged one behind the other in the direction of the axial air flow 45 in order to create an additional filtering effect. The second filter element 49b can be supported by means of a housing extension stage 50 attached to the filter housing 30. The housing extension stage 50 is in Figure 11 attached to the filter housing 30 by means of quick-release fasteners 51a, 51b.

[0074] According to Figure 11 In addition to the outer section 34, the first holder 33 also has an inner section 52, which is attached to the mounting plate 29 at a distance therefrom. Between the inner section 52 and the mounting plate 29, a fan receiving space 53 is formed, in which the radial fan 43 is located. In particular, Figure 11that the inner section 52 of the first bracket 33 together with the mounting plate 29 and the air deflection profiles 44a, 44b form a fan housing 44 for the radial fan 43.

[0075] Furthermore, Figure 11 that a cavity 55 is formed between the cover 22 and the inner portion 52 of the first holder 33, in which cavity electronic components can be accommodated.

[0076] Figure 12 shows the external control panel 11 Figure 2 with a fresh air device 20' mounted thereon. The fresh air device 20' has a filter unit 28' which, according to Figure 12a box-shaped filter housing 30'. Positioned above the filter housing 30' is an air output unit 21' connected to the filter housing 30'. A blower unit 42' is indicated in dashed lines, which is located between the filter unit 28' and the air output unit 21'. Depending on the design of the fresh air device 20, the blower unit 42' can be completely housed within the air output unit 21'.

[0077] Furthermore, Figure 12 that the air output unit 21' forms two flow channels 47a', 47b' leading away from the fan unit 42' mounted therein. The two flow channels 47a', 47b' form air outlet openings 23a', 23b', from which fresh air exits for an operator positioned at the external control station 10.

[0078] Figure 13 shows the structure Figure 12from a rear perspective. The fresh air device 20' has a bracket 33', by means of which it is fastened to a pipe 56 of the external control station 10. Although the bracket 33' for fastening the fresh air device 20' is shown here, it would be quite conceivable to mount the fresh air device 20' with a comparable fastening technique as the fresh air device 20, ie using a first and a second bracket according to the first bracket 33 and the second bracket 36. The fastening of the blower unit 42' can also be carried out in a similar way to the fastening of the blower unit 42, in particular according to the structure of Figure 11 .

[0079] In Figure 13one can clearly see that the fresh air device 20' forms an add-on module M' for the external control console 11, which can be easily installed, and in particular retrofitted, on the external control station 10 - like the fresh air device 20 on the driver's control station 5.

Claims

1. Road making machine (1) which is configured in the form of a road finishing machine (2) or a charger vehicle (15) for a road finishing machine (2) , characterised in that the road making machine (1) comprises a fresh air means (20, 20') for a driver control panel (7, 19) of a driver control platform of the road making machine (1) that is open at least at its side or for an external control console (11) of a road making machine (1), wherein the fresh air means (20, 20') comprises at least one blower unit (42, 42') for generating an air flow, at least one filter unit (28, 28') for filtering the air flow formed by means of the blower unit (42, 42'), and an air discharge unit (21, 21') including at least one air outlet opening (23a, 23b, 23a', 23b') for the filtered air flow, and wherein the fresh air means (20, 20') is designed as a modular attachment apparatus (M, M') configured to be removably attached to the driver control panel (7, 19) or to the external control console (11).

2. Road making machine according to claim 1, characterized in that the blower unit (42, 42') includes a centrifugal fan (43) or an axial-flow fan.

3. Road making machine according to claim 1 or 2, characterized in that the blower unit (42, 42') can be connected with a power supply source of the road making machine (1), and / or the fresh air means (20, 20') includes at least one separate accumulator for an operation of the blower unit (42, 42').

4. Road making machine according to one of the preceding claims, characterized in that the air discharge unit (21, 21') includes at least one operating element (24) for adjusting a speed of the blower unit (42, 42').

5. Road making machine according to one of the preceding claims, characterized in that the filter unit (28, 28') is positioned upstream of the blower unit (42, 42') seen in the direction of flow, and / or the filter unit (28, 28') includes a filter housing (30, 30') for receiving at least one replaceable filter element (49a, 49b).

6. Road making machine according to claim 5, characterized in that the filter unit (28, 28') provides at least one housing expansion stage (50) for the filter housing (30, 30') by means of which at least one further filter element (49a, 49b) can be received.

7. Road making machine according to one of the preceding claims, characterized in that the air discharge unit (21) includes a mounting plate (29) to which the blower unit (42) and / or the filter unit (28) is fastened.

8. Road making machine according to claim 7, characterized in that the air discharge unit (21) includes a first mounting (33) for removably attaching the fresh air means (20) at the driver control panel (7, 19) or at the external control console (11), the mounting being also provided, together with the mounting plate (29), for forming a fan housing (54) for the blower unit (42).

9. Road making machine according to claim 8, characterized in that the first mounting (33) is removably connected with a second mounting (36) that can be fastened to the driver control panel (7, 19) or the external control console (11).

10. Road making machine according to claim 9, characterized in that a connection point (37) formed between the first mounting (33) and the second mounting (36) is mounted to be freely accessible by an operator above the driver control panel (7, 19) or the external control console (11).

11. Road making machine according to one of the preceding claims, characterized in that the air flow sucked in through the filter unit (28, 28') by means of the blower unit (42, 42') can be distributed by the blower unit (42, 42') as a filtered fresh air flow to at least two flow channels (47a, 47b, 47a', 47b') formed within the air discharge unit (21, 21').

12. Road making machine according to claim 11, characterized in that the flow channels (47a, 47b) are designed to guide the fresh air flow generated by the blower unit (42, 42') in opposite directions to respective outlet openings (23a, 23b) of the air discharge unit (21).

13. Road making machine according to one of claims 11 or 12, characterized in that the air discharge unit (21) comprises a cover (22) for covering the flow channels (47a, 47b), and / or the respective air outlet opening (23a, 23b) includes adjustable louvers (25a, 25b).

14. Road making machine according to one of the preceding claims, characterized in that the fresh air means (20, 20') is mounted to the driver control panel (7, 19) or to the external control console (11) such that the air outlet opening (23a, 23b, 23a', 23b') formed thereat is positioned next to an operating surface (8, 12) of the driver control panel (7, 19) or the external control console (11).

15. Road making machine according to one of the previous claims, characterized in that the fresh air means (20, 20') is fastened to the driver control console (7, 19) of the driver control platform (5, 18) which is designed to be open at least at the side, or to the external control console (11) of the external control platform (10) of the road making machine (1).