SELF-PROPELLED MACHINE

Abstract

A self-propelled machine for agriculture forms an agricultural gantry system. The machine has a support structure for receiving attachment devices, at least one drive unit with a control module, a support structure forming an agricultural gantry system and a plurality of ground supports for moving the support structure. The agricultural gantry system is convertible from a road orientation defining a driving width (FB) to a working orientation having a substantially larger working width (AB).

Claims

1.-36. (canceled)

37. A self-propelled machine for agriculture forming an agricultural gantry system and having a support structure for receiving attachment devices, comprising: at least one drive unit with a control module; a support structure forming an agricultural gantry system comprising; a functional frame having a first end and an opposed second end, the functional frame having at least one asymmetrical base carrier for performing variable work tasks disposed between the first end and the second end of the functional frame; and a side carrier having a proximal end and an opposed distal end, the side carrier disposed at the first end of the functional frame; a plurality of ground supports for moving the support structure, at least one ground support provided at each of the first end and the second end of the functional frame, and an additional ground support provided at the side carrier; the agricultural gantry system being convertible from a road orientation defining a driving width (FB) to a working orientation having a substantially larger working width (AB), the driving width (FB) being defined between the ground support provided at the first end of the functional frame and the additional ground support provided at the side carrier when the agricultural gantry system is in the road orientation, the driving width (FB) being divided into three divisions; the support structure defining a longitudinal orientation in the road orientation wherein a vertical longitudinal centre plane (M) is defined as extending between a region of the ground support provided at the first end of the functional frame and the another ground support provided at the side carrier, and the functional frame being offset from the vertical longitudinal centre plane (M), the first end of the asymmetrical base carrier being connected to the side carrier at a proximal one of the three divisions of the driving width (FB).

38. The self-propelled machine according to claim 37, wherein in the road orientation, the asymmetrical base carrier of the functional frame extending substantially parallel to a direction of travel (FS) defines a lateral boundary surface for a maximum permissible travel width (FB) to be maintained.

39. The self-propelled machine according to claim 37, wherein the support structure with the asymmetrical base carrier forms at least one central receiving space.

40. The self-propelled machine according to claim 37, wherein the functional frame has a substantially L-shaped support structure (T), when viewed in a top view, and is connected with the only one side carrier.

41. The self-propelled machine according to claim 37, wherein the side carrier comprises a plurality of assemblies that are connected to the asymmetrical base carrier to form an E-shaped or U-shaped support structure when viewed in a top view.

42. The self-propelled machine according to claim 37, further comprising: another side carrier having a proximal end and an opposed distal end, the proximal end of the another side carrier connected to the second end of the asymmetrical base carrier; and another ground support provided at the another side carrier, wherein a receiving space is defined as delimited at least in a region between the side carrier, the asymmetrical base carrier and another side carrier.

43. The self-propelled machine according to claim 42, wherein the side carrier, the asymmetrical base carrier and the another side carrier each have variable lengths, a base area is defined at least partially between the side carrier and the another side carrier, and therefore, a volume of the receiving space of the support structure is variably configured.

44. The self-propelled machine according to claim 42, further comprising one or more attachment devices, wherein the receiving space comprises at least three functional sections for coupling the one or more attachment devices in one plane, and at least one attachment position being specified for each of the one or more attachment devices with respect to the asymmetrical base carrier, the side carrier and/or the another side carrier.

45. The self-propelled machine according to claim 37, wherein the asymmetrical base carrier and/or the side carrier is/are adjustable in their horizontal position and/or their vertical height above a road surface or field work surface.

46. The self-propelled machine according to claim 39, wherein at least one of the plurality of ground supports comprises a pivoting construction that is operable to position the respective ground support in at least one operating position, the at least one operating position of the ground support providing an additional free space to access the at least one central receiving space.

47. The self-propelled machine according to claim 44, wherein the ground support provided at the first end of the functional frame and the additional ground support provided at the side carrier comprise two support wheels or belt drives cooperating in pairs for displacing the ground support at the first end and the additional ground support; and the ground support provided at the second end of the functional frame and the another ground support provided at the another side carrier comprise two support wheels or belt drives cooperating in pairs for displacing the ground support at the second end and the another ground support.

48. The self-propelled machine according to claim 47, wherein: the one or more attachment devices defines a structure-stiffening connection position and, when in use, the at least one of the attachment devices is operable to provide an optimal load distribution on the support structure both in the working orientation and in the road orientation; and a circumferential direction of the asymmetrical base carrier, side carrier and the another side carrier is defined transversely to their respective longitudinal direction, and all sides of the circumferential direction are provided with respective connection areas for the at least one of the attachment devices.

49. The self-propelled machine according to claim 48, wherein the one or more attachment devices has a connection position assigned to the asymmetrical base carrier, the side carrier and/or the another side carrier, the at least one of the attachment devices enclosing the asymmetrical base carrier, side carrier and another side carrier at least in the regions of their circumferential direction.

50. The self-propelled machine according to claim 44, wherein the one or more attachment devices are operable for different work effects and are attached simultaneously to the asymmetrical base carrier, side carrier and/or another side carrier.

51. The self-propelled machine according to claim 44, further comprising fixing elements disposed on the asymmetrical base carrier, the side carrier and/or the another side carrier for an automatic attachment and detachment of the one or more attachment devices.

52. The self-propelled machine according to claim 37, wherein: each of the ground supports comprises one or more support wheels and/or belt drives that are adjustably connected to the support structure; and an outer edge of the asymmetrical base carrier defines two lateral reference surfaces, one each towards the first end and the second end of the functional frame, the belt drives operable to position the asymmetrical functional frame with coupled attachment device(s) in the road orientation, and the belt drives are alignable without overhang in the region of the two lateral reference surfaces.

53. The self-propelled machine according to claim 37, wherein: the functional frame (FR) is formed as an independently movable unit; further comprising at least one attachment device, wherein the functional frame forming the independently movable unit is operable to perform controllable positioning and/or coupling movements for connecting or releasing of at least one attachment device; and the at least one attachment device is placed largely immovably, and in this position the agricultural gantry system is coupled and uncoupled by respective driving, pushing, lifting and/or pivoting movements of the support structure.

54. The self-propelled machine according to claim 42, further comprising: at least one power supply; at least one cooler-fan system disposed at the side carrier, wherein the at least one power supply provides power to the at least one drive unit, the plurality of ground supports and the at least one cooler-fan system; a drive train for attaching at least one attachment device to the functional frame, wherein the asymmetrical base carrier defines an interior enclosed at least in regions by contour plates, the at least one cooler-fan system generating excess pressure in the interior and the drive train being disposed in the interior of the asymmetrical base carrier; and wherein the functional frame provided with the side carrier and/or the another side carrier is designed as a modular unit, and the asymmetrical base carrier in the region of the contour plates has an installation opening that is releasable for detaching the side carrier and/or the another side carrier from the asymmetrical base carrier.

55. The self-propelled machine according to claim 42, wherein: the asymmetrical base carrier, the side carrier and the another side carrier forming a U-structure or L-structure comprises in each case four caterpillar tracks symmetrically arranged in pairs to form a synchronously steerable system; the side carrier and the another side carrier each comprise at least one steering cylinder in the region of the additional ground support and the another ground support, respectively for controlling the road or field driving direction of the respective caterpillar tracks; and. each of the four caterpillar tracks has an inner support space enclosed by a respective movement path (BB) of the each of the four caterpillar tracks, the inner support space having an electric motor with a planetary gear, wherein the electric motor with the planetary gear runs without overhang under a width of each of the four caterpillar tracks.

56. The self-propelled machine according to claim 37, wherein the additional ground support is provided at the distal end of the side carrier.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0074] Further details of the machine according to the invention can be seen from the following description. To this end the accompanying drawings serve for explanation. The drawings show:

[0075] FIG. 1 is a perspective view of a support structure for an agricultural working machine, which forms the basis of a gantry system according to the prior art;

[0076] FIG. 2 is a top view of a system according to the invention with a functional frame having an asymmetrical base carrier;

[0077] FIG. 3 is a perspective view similar to FIG. 2 with the functional frame according to the invention in working alignment;

[0078] FIG. 4 is a top view of the functional frame in road orientation;

[0079] FIG. 5 is a perspective view of the functional frame according to FIG. 4;

[0080] FIG. 6 is a top view of the functional frame similar to FIG. 4 with a control cabin,

[0081] FIG. 7 is a perspective view of the system of FIG. 6;

[0082] FIG. 8 is a perspective view of the functional frame similar to FIG. 3. showing a schematic representation of the installation position of attachment devices;

[0083] FIG. 9 is a sectional view according to arrow A-A in FIG. 8;

[0084] FIG. 10 is a top view of the functional frame similar to FIG. 2 with an attachment device integrated into a central receiving space;

[0085] FIG. 11 is a perspective view of the self-propelled working machine positioned in the working orientation;

[0086] FIG. 12 is a top view similar to FIG. 2 with an L-shaped functional frame;

[0087] FIG. 13 is a view of the functional frame in the working orientation with the viewing direction according to arrow III in FIG. 3;

[0088] FIG. 14 to FIG. 16 show respective phases of movements of the functional frame during connection to an attachment device;

[0089] FIG. 17 is a schematic illustration of the system with assemblies integrated into the base carrier;

[0090] FIG. 18 and FIG. 19 are respective detailed representations of assemblies of the drive and of the ventilation of the system;

[0091] FIG. 20 is a schematic diagram of the division of the modular system;

[0092] FIG. 21 is a cross-sectional view of the base carrier;

[0093] FIG. 22 to FIG. 26 show respective detailed representations of steering and support assemblies in the region of the drive caterpillars; and

[0094] FIG. 27 is a sectional view in the region of a twist-lock connection for attachment devices.

DETAILED DESCRIPTION OF THE INVENTION

[0095] A basic principle of a self-propelled agricultural working machine is shown in FIG. 1 as the prior art. This working machine 1 forming an agricultural gantry system has a support structure T, which in turn can receive respective attachment devices 2, has at least one drive unit 3 with control assembly 4, and can be moved on the ground 5 by means of end-side ground supports B, B. This support structure T forms with at least one base carrier 6 as a substantially centrally extending assembly, the agricultural gantry system, which can be adapted to varying working tasks in the region of the attachment device 2. Starting from the working orientation of the system illustrated in FIG. 1 (optionally direction of travel F) with a working width AB, such gantry systems can be converted into a road orientation (direction of travel FS) defining a driving width FB (similar to FIG. 4). For this purpose the support structure T uses the side supports ST, ST provided on the central base carrier 6 together with the ground supports B, B.

[0096] The self-propelled working machine 1 is based according to the invention on a combination of components, by means of with which the known support structures T of agricultural gantry systems are improved. It is now envisaged that in the road orientation with direction of travel FS of the machine 1, the ground supports B, B arranged at the end on the base carrier 6 define a vertical longitudinal centre plane M extending between them (FIG. 4). According to the invention, in relation to this functional longitudinal centre plane M for the road orientation, the support structure is designed as a functional frame FR with asymmetrical base carrier 6.

[0097] This is followed by a multiplicity of structurally possible designs, in which starting from an also variable dimension of the possible driving width(s) FB, it is possible to optimise the position of the base carrier 6 with a view to the stability of the component-composite system. It has been shown that the base carrier 6 can be connected to the at least one side support ST, ST in particular in a respective outer dividing third TD, TD (FIG. 6, top) of this length dimension FB.

[0098] From an overview of the illustrations according to FIGS. 2 to 7, it becomes clear thatstarting from variably predefinable travel widths (length dimension FB) of this asymmetrical systemthe base carrier 6 on the at least one side support ST, ST defines respective connecting regions 7, 7; 8, 8 for the ground supports B, B, which are arranged largely as mirror images relative to the transverse centre plane Q according to the working orientation (FIG. 2, FIG. 3)

[0099] Starting from the concept of the asymmetrical function frame FR according to the invention, this provides the possibility that its base carrier 6 running substantially parallel to the direction of travel FS or longitudinal centre plane M, can form a continuous lateral reference surface 9 (FIG. 4). This is then used as a starting plane for a maximum permissible driving width that has to be maintained, according to the length dimension FB.

[0100] In this connection a design of the frame construction is conceivable in which the functional frame FR has a support structure substantially L-shaped in top view, with only one of the side supports ST, ST (FIG. 12). This construction is largely equivalent to the further illustrated frame variants, so that the individual components are designed accordingly.

[0101] An optimum combination of the support assemblies envisages that the functional frame FR is provided on its base carrier 6 with multiple components that can be used as respective side supports ST, ST. This produces for practical use a construction in which a functional frame FR (FIGS. 2 to 11; FIGS. 13 to 16), which is essentially U-shaped in top view, is used. An E- or F-shaped construction (not shown) is also conceivable.

[0102] For the preferred embodiment of the U-frame, in each case only one of the side supports ST, ST is provided at the two end regions of the base carrier 6. This three-support concept is aimed at providing a central receiving space 10, which is delimited in regions and thus forms an inventive base element. Thus, with variable lengths 11 of the base carrier 6 and variable length dimensions 12, 12 of the side supports ST, ST, a three-sided base surface of the functional frame FR can be defined in the region of the inner receiving space 10 (FIG. 4). This then provides for the practical application of the component combination, wherein with this variably adjustable base area of dimensions 11 and 12 the usable receiving volumecorresponding to the height 13 (FIG. 8)in the region of the central receiving space 10 also allows a multiplicity of variable uses (FIGS. 8 to 16), and in this way tilling, sowing, fertilising, spraying and harvesting plans can be executed in an optimum manner.

[0103] The modular overall system in the region of the functional frame FR is also directed to the fact that in the region of the functional frame FR multiple receiving spaces 10, 10 to be variably dimensioned in the height dimension 13 (FIG. 9) can be defined in the region of the functional frame FR.

[0104] It is clear in this connection that the three-sided functional frame FR with the asymmetrical base carrier 6 and the side supports ST, ST comprises severalin particular at least threefunctional sections for the coupling and decoupling of attachment devices 2 (FIG. 10) at least in the inner region of the central receiving space 10. In this case the attachment devices 2 can preferably occupy respective spatial regions 21, 22 (FIG. 8, cuboid structure; FIG. 9, hatched cross sections of the receiving space), in which a stable support is ensured. The working of the agricultural area in the region of the ground 5 is indicated by respective spatial regions 21 and 22.

[0105] Further structural improvements of the functional frame FR are directed to the fact that the base carrier 6 and/or the side supports ST, ST in their respective horizontal positioni.e. in the direction of the longitudinal centre plane M or the transverse plane Qand/or their vertical height 13 above a road surface or field working surface 5 (FIG. 9) can be adjusted largely arbitrarily. In this connection it is also conceivable that the ground supports B, B provided in particular with support wheels, belt drives or similar are, for their part, adjustably connected to the functional frame FR.

[0106] From the illustration in FIG. 2 (similar to FIG. 12), in the region of the ground support Bwith the connecting regions 7, 7the possibility of adjustment conceivable for the displacement from the working orientation (working width AB) to the road orientation (driving width FB) is illustrated in principle. In this case respective belt drives 14, 15, 14, 15 (in the case of ST) are provided on the side carrier ST, which are held by a special pivoting structure 16, 16; 17, 17 (FIG. 3). This pivoting construction 16, 16; 17, 17 enables the pivoting movements, partially indicated by an arrow 18, 18. In conjunction with the principle according to FIG. 2 with the pivoted-up front view according to FIG. 13, it is clear that in at least one operating position of the ground supports B, B an additional lateral free space 24, 24 (width Z, Z) can be produced as access to the at least central receiving space 10. The coupling and decoupling of the attachment devices 2 (FIG. 10) is thus possible without hindrance by means of the components of the ground supports B, B. The optimal design of these components displaceable in the release position envisages that two supporting wheels or belt drives 14, 15, 14, 15 cooperating in pairs are provided on each of the side supports ST, ST as the respectively displaceable ground support B, B.

[0107] Further improvements of the asymmetric three-support system can be achieved if, in the region of the functional frame FR, at least one of the side supports ST, ST is connected to the base carrier 6 so it can be displaced in relation to the base carrier 6. It is also conceivable that the functional frame FR can be formed with telescopic components (not illustrated) in the region of the base carrier 6 and/or at least one of the side supports ST, ST.

[0108] In order to complete the self-propelled working machine 1, corresponding drive and control assemblies are provided. In this connection a system operable from a driver's cab 19 (FIG. 6, FIG. 7) can be provided with a drive construction formed as a motor-gear unit, not shown in detail. This can be implemented as an internal combustion engine, an electric motor, a hydraulic motor or similar. The drive construction can for its part be arranged in the region of the base carrier 6 and/or one of the side supports ST, ST (not shown in detail). It is also conceivable to use assemblies known from the prior art for a largely automatic controlfor example a GPS-guided systemfor the machine 1. The overall concept of the working machine 1 is designed in such a way that a fully autonomous operation and use is also possible.

[0109] The basic construction of the functional frame FR according to the invention is designed for the modular construction and a stable implementation for each specific application in such a way that also complex structures of attachment devices, for example complete harvesting equipment such as cutters, combine harvesters or similar multifunctional units with corresponding accessories, can be accommodated with the base carrier/side support unit. It is advantageously envisaged that the at least one attachment device 2 on the functional frame FR can define a structure-stiffening connection position. This stabilisation concept is aimed at the fact that when the system is used both in the working orientation and in the road orientation, in each case an optimal load distribution on the functional frame FR is achieved. In addition to a safe handling of the machine 1 also equipped with the components, the working life of the machine 1 can also be ensured.

[0110] In this connection the functional frame FR is constructed in such a way that the base carrier 6 and/or the respective side supports ST, ST can in each case specify at least one defined mounting position for at least one of the agricultural attachment devices 2. Starting from the basic representations in FIG. 8 and FIG. 9 it is clear that the base carrier 6, in its circumferential direction definable transversely to its longitudinal orientation, can also be provided on all sides with respective connecting regions for at least one of the variably usable attachment devices 2. In FIG. 8 and FIG. 9 the base carrier 6 is included on three sides 25, 26, 27. It is also conceivable that the at least one attachment device 2 can be attached to respective inner and/or outer sides of the respective side support ST, ST; in FIG. 8 the receiving space 10 is shown adjoining the side supports ST, ST on the inside.

[0111] From the sectional view in FIG. 9 it is clear that the attachment devices 2 (only schematically indicated) here filling the receiving space 10 are assigned to the respective base carrier 6 of the functional frame FR on multiple sides, so that the attachment devices 2 at least enclose the base carrier 6 in regions in its circumferential direction (FIG. 9, right-hand side). A similar concept is also conceivable in the region of the side supports ST, ST (not shown).

[0112] The optimal design of the functional frame FR with a view to a largely arbitrary modular extension envisages that, in the region of the base carrier 6 and/or both side supports ST, ST, multiple attachment devices 2 intended for different working effects can also be fixed at the same time. Starting from work steps involving soil working (basic representation according to FIG. 11), further agricultural work steps with a view to the sowing of seeds, subsequent fertilisation, intermediate pest control and the final harvesting operation can be carried out using the working machine 1. For all tasks, respective fixing elements 20, 20 (FIG. 5, FIG. 6) for the special attachment devices 2 are provided in the region of the functional frame FR. In this case constructions with actuating assemblies are conceivable, in which a largely automatic attachment and/or detachment of the attachment devices 2 can also be activated. It is also conceivable that one or more drive motors are integrated into the system as respective units, so that multiple drive connections can also be used. With this embodiment the operation of the respective variably positionable attachment devices 2 can then be executed individually or jointly.

[0113] With the three-leg design of the functional frame FR according to the invention, it is achieved that the functional frame FR supported on the floor side, in particular with four belt drives, can in the region of its asymmetrical receiving system also be positioned in a compact road travel position with attachment devices 2 located in the coupling position. From the illustrations in FIG. 4 to FIG. 7 it is clear in this case that the belt drives 14, 15, 14, 15 can be aligned without overhang in at least one of the two lateral reference surfaces 9, and the safety in the road orientation is thereby ensured.

[0114] The advantageous embodiment of the system envisages that the asymmetrical function frame FR on the side supports ST, ST optionally forming the E-, F-, L or U-structure can in each case have four crawler chains, four belt drives, four support wheels or similar or ground supports B, B in a paired symmetrical arrangement, and a synchronously steerable implementation of the system is thereby formed.

[0115] From the basic representations according to FIG. 14 to FIG. 16 it is clear that the functional frame FR according to the invention can cooperate as an independently movable unit with the respective attachment device 2. In FIG. 14 a travel movement of the functional frame FR towards the attachment device 2 fixedly held on the ground 5 is indicated with an arrow 28. The connecting position envisaged with the receiving space 10 (FIG. 10)on the base carrier 6is achieved in the position shown in FIG. 15. It is therefore clear that respective controllable positioning and/or coupling movements of the functional frame FR can be executed for the connectionor subsequently conceivably releaseof the at least one attachment device 2. In this connection basically any driving, pushing, lifting and/or pivoting movements are conceivable for the coupling or uncoupling of system components.

[0116] In FIG. 16 an additional lifting movement for the positioning of the attachment device 2 at a height 30 above the ground 5 is indicated with an arrow 29. The system concept of the functional frame FR according to the invention is directed so that it can be optimally connected in the region of its respective connection points (for example: 20, 20) in basically any arbitrary configuration to agricultural equipment types. In this connection systems are conceivable in which the functional frame FR as a whole is operated as an autonomous unit predominantly without an operator.

[0117] The structural conversion of the overall concept according to FIG. 2 leads to an integrated construction in the region of the base carrier 6, as is shown by way of example in FIG. 17. In this case it is clear that a double power supply with two substantially symmetrical units 31, 31 is preferably provided in the region of the base carrier 6. From the detailed representation according to FIG. 18 it is clear that the power supply unit 31 is provided with a drive unit 3, which is guided via a drive train 32 to the at least one attachment device 2. On the other hand the drive unit 3 can be implemented in such a way that a respective travelling drive 34, 34 can be activated in the region of the tracks 14, 14 by means of the connection 33.

[0118] From a further detail illustration according to FIG. 19 it is clear that the drive concept described above can also be connected to a cooler/fan system 35. This cooler/fan system 35 integrated in particular in the region of the side supports ST, ST, is so arranged with respect to the working space of the system that comparatively clean intake air AL can be drawn into the system. Apart from the cooling of drive units, the contamination of further assemblies can be effectively avoided with this drawn-in air. In this connection variable deflections of the compressed air DL towards the region of the attachment device devices 2 are provided. The concept of the largely closed base carrier 6 can also be provided with additional lines ZL, so that further partial air flows can be used in the interior of the base carrier 6.

[0119] FIG. 21 shows a basic representation of the cross-sectional structure of the base carrier 6, wherein this defines an interior space 38 surrounded at least in regions by contour plates 36, 37 and accommodating functional parts FT (Fig. of the system.

[0120] As already discussed in conjunction with FIG. 19, an excess pressure can be generated in this interior 38 by means of the cooler/fan system 35, wherein additional air guides 39 are also conceivable. The interior 38 is defined in such a way that the drive train 32 for the at least one attachment device 2 can be led out from the interior.

[0121] In this connection the functional frame FR is designed as a modular unit both in the details according to FIG. 21 and also the individual assemblies. The contour plates 38, 39 are designed via releasable connections 40, 40 in such a way that, if necessary, mounting openings for the inner units can be released without any problem. In FIG. 20 the modular construction is shown in the region of the side supports ST, wherein it is clear that the base carrier 6 can be separated from further assemblies in the region of a dividing plane TS and a division which is optimal for transport purposes is thus achievable.

[0122] Structural configurations in the region of the respective ground supports B, B are shown in the representations according to FIG. 22 to FIG. 26. It is clear in this case that the support construction 41 defines a vertical axis 42 about which the driving track 14 can be swiveled in such a way that the afore-described different use or driving positions can be achieved. By means of a corresponding lifting movement in the direction of the arrow 43, an adjustment movement in the region of a steering disc 45 can be realised by means of a steering cylinder 44, so that corresponding latching elements enable a fixing in the intended position. In addition to this adjustment system a steering shaft 46 is provided in the region of the vertical axis 42, which cooperates with a lifting cylinder 47 that is introduced into the steering shaft in the region of an access opening 48. With this support system, in particular high driving and compressive loads can be absorbed in the region of the ground supports B, B. In FIG. 24, the above-described system with the parts in the region of the steering disc 45 and of the lifting cylinder in the region of the steering shaft is illustrated again in a cross-sectional illustration.

[0123] The detailed structure in the region of the drive 34 will become clear from the illustrations in FIG. 25 and FIG. 26. The driving track 14 shown in perspective in FIG. 25 defines a supporting space 50 defined by its movement path BB, in which an electric motor 51 with a planetary gear 52 is provided as the drive 34. It is clear from FIG. 26 that this assembly extends in the region of the drive 34 without overhang under the width 53 of the driving track 14.

[0124] FIG. 27 shows a further detail in the connecting region 32 for the attachment device 2. In this case provision is made so that the base carrier 6 is designed in the region of respective twist-lock connectors 54 for a largely automatic coupling of attachment devices 2. A further advantageous embodiment of the system envisages that the driver's cab 19 (FIG. 17) in the region of its support connection to the functional frame FR, permits a pivoting according to the arrow 55.