AGRICULTURAL IMPLEMENT FOR ATTACHMENT OR ATTACHMENT TO A TOWING VEHICLE AND METHOD FOR SETTING UP ROAD OPERATION OF AN AGRICULTURAL IMPLEMENT

Abstract

An agricultural work implement, in particular a mowing unit, for attachment to a towing vehicle is disclosed, along with method of road operation setup, that includes an attachment frame, on which a telescopic support arm is pivotably and/or shiftably arranged, at least one aggregate hinged to the support arm, a gearbox which can be connected to a power take-off shaft of the towing vehicle in a power-receiving manner, and a variable-length output shaft, which is arranged in a power-transmitting manner between the gearbox and the aggregate, wherein the aggregate is positionally changeable by pivoting and/or shifting the support arm and is reversibly adjustable from a field configuration provided for field operation into a transport configuration provided for road operation. The telescoping and/or pivoting of the support arm and/or the adjustment of the gearbox occurs in different sequences as a function of current positions of the support arm and/or the gearbox.

Claims

1-15. (canceled)

16. An agricultural work implement (1), in particular mowing unit, for attachment to a towing vehicle, comprising an attachment frame (2), on which a telescopic support arm (4) is pivotably and/or shiftably arranged; at least one aggregate (3) hinged to the support arm (4); a gearbox (5) which can be connected to a power take-off shaft of the towing vehicle in a power-receiving manner; and a variable-length output shaft (53), which is arranged in a power-transmitting manner between the gearbox (5) and the aggregate (3), wherein the aggregate (3) is positionally changeable by pivoting and/or shifting the support arm (4), and is reversibly adjustable from a field configuration (F) provided for field operation, in which the support arm (4) is pivoted into a flat position (A3) that is approximately parallel to the ground, and reversibly telescopic from a retracted sliding position (Z1) into an extended sliding position (Z3), into a transport configuration (T) provided for road operation, in which the support arm (4) is pivoted into a folding position (A1) that is erect with respect to the flat position (A3), and is shifted into the retracted sliding position (Z1), wherein the gearbox (5) is adjustable from a home position (G1), in which it is drive-connectable or drive-connected to the aggregate (3), into a shift position (G2) for setting up road operation, characterized in that when the aggregate (3) is transferred from the field configuration (F) to the transport configuration (T), the telescoping and/or pivoting of the support arm (4) and/or the adjustment of the gearbox (5) takes place in different sequences as a function of the current positions (A1, A2, A3, Z1, Z2, Z3) of the support arm (4) and/or one current position (G1, G2) of the gearbox (5).

17. The agricultural work implement (1) according to claim 16, further comprising an electronic control device (8) adapted to mechanically and/or electrically control the adjustment of the support arm (4) and/or the gearbox (5).

18. The agricultural work implement (1) according to claim 17, wherein the electronic control device (8) includes at least one measuring device (81, 82) that is configured to sense the current position (A1, A2, A3, Z1, Z2, Z3) of the support arm (4) and/or the current position (G1, G2) of the gearbox (5), and is configured to carry out the adjustment of the aggregate (3) from the field configuration (F) to the transport configuration (T) and/or of the gearbox (5) from the home position (G1) to the shift position (G2) as a function of the recorded positions (A1, A2, A3, Z1, Z2, Z3) and/or position (G1, G2).

19. The agricultural work implement (1) according claim 16, wherein the support arm (4) can only be folded into the erect folding position (A1) when the sliding position (Z1, Z2) is predominantly retracted, and/or can only be retracted into the retracted sliding position (Z1) when the folding position (A1, A2) is predominantly erect, when the gearbox (5) is shifted into the shift position (G2).

20. The agricultural work implement (1) according to claim 16, wherein the telescoping and/or pivoting of the support arm (4) and/or the adjustment of the gearbox (5) is carried out at least partially in succession and/or at least partially simultaneously to set up a road operation.

21. The agricultural work implement (1) according to claim 17, wherein the electronic control device (8), to set up road operation, is configured to control the gearbox (5) that: first shifts from the home position (G1) to the shift position (G2) when a length of the support arm (4) is less than or equal to a limit length, in particular, the support arm (4) is shifted to the retracted sliding position (Z1); or first shifts from the home position (G1) to the shift position (G2), if the length of the support arm (4) is greater than the limit length and a pivot angle of the support arm (4) is greater than a limit angle, in particular, the support arm (4) is pivoted into the erect folding position (A1); or shifts from the home position (G1) to the shift position (G2), whereas the support arm (4), in particular starting from the flat position (A3), is pivoted into the erect folding position (A1), if the length of the support arm (4) is greater than the limit length and the pivot angle of the support arm (4) is smaller than or equal to the limit angle.

22. The agricultural work implement (1) according to claim 17, wherein the electronic control device (8) is configured to switch the gearbox (5) from an in-service mode to an out-of-service mode, either by manual set up of an operator, or when the support arm (4) is folded into an intermediate position (A3) relative to the flat position (A3), in particular into a headland position or higher.

23. The agricultural work implement (1) according to claim 17, wherein the electronic control device (8) is configured to carry out the setting up of the road operation only in an out-of-service mode.

24. The agricultural work implement (1) according to claim 22, wherein the electronic control device (8) is configured to carry out the setting up of the road operation only in the out-of-service mode.

25. The agricultural work implement (1) according to claim 16, wherein the attachment frame (2) includes a guide means (54) for reversibly shifting the gearbox (5), which extends in shift direction (51), in particular in a direction of travel (91).

26. The agricultural work implement (1) according to claim 16, further comprising that for telescoping and/or pivoting the support arm (4) and/or for adjusting the gearbox (5), it respectively comprises an actuator (56), wherein the actuator (56) can: either be actuated independently of one another; or at least partially be interconnected for simultaneous actuation.

27. The agricultural work implement (1) according to claim 16, further comprising a telescoping input shaft (52), which is arranged between the gearbox (5) and the power take-off shaft of the towing vehicles and is connected by means of a universal joint (523) and/or a disconnect coupling with the gearbox (5).

28. The agricultural work implement (1) according to claim 17, wherein the work implement (1) comprises two aggregates (3), and in that the electronic control device (8) is configured to change the position (A1, A2, A3, Z1, Z2, Z3) of both aggregates (3) simultaneously.

29. A method for setting up a road operation of an agricultural work implement (1) that includes an electronic control device (8), which comprises: adjusting by pivoting and/or shifting of a telescopic support arm (4) to adjust a position of an aggregate (3) that is hinged to the work implement (1) via the telescopic support arm (4), wherein the aggregate (3) reversibly pivots from a field configuration (F) provided for field operation, in which the support arm (4) is pivoted into a flat position (A3) that is approximately parallel to the ground, and is reversibly telescopic from a retracted sliding position (Z1) into an extended sliding position (Z3), into a transport configuration (T) provided for road operation where the support arm (4) is pivoted into a folding position (A1) which is erect with respect to the flat position (A3) and is transferred into the retracted sliding position (Z1); and transferring of the aggregate (3) from the field configuration (F) into the transport configuration (T), the telescoping and/or pivoting of the support arm (4) and/or the shifting of the gearbox (5) takes place in different sequences as a function of current positions (A1, A2, A3, Z1, Z2, Z3) of the support arm (4) and/or current positions (G1, G2) of the gearbox (5).

30. The method according to claim 29, further comprising the steps of: shifting the gearbox (5) from a home position (G1), in which it is drive-connectable to the aggregate (3), to a shift position (G2); and detecting a current position (A1, A2, A3, Z1, Z2, Z3) of the aggregate (3) and a current position (G1, G2) of the gearbox (5), wherein the adjustment of the aggregate (3) from the field configuration (F) into the transport configuration (T), and/or of the gearbox (5) from the home position (G1) into the shift position (G2) is carried out as a function of the detected positions (A1, A2, A3, Z1, Z2, Z3) and/or positions (G1, G2) with a control device (8) of the work implement (1).

31. The method according to claim 29, further comprises: folding the support arm (4) into the erect folding position (A1) when the sliding position (Z1, Z2) is predominantly retracted; and/or retracting the support arm (4) into the retracted sliding position (Z1) only when the folding position (A1, A2) is predominantly erect, when the gearbox (5) is shifted into the shift position (G2).

32. The method according to claim 30, further comprises: folding the support arm (4) into the erect folding position (A1) when the sliding position (Z1, Z2) is predominantly retracted; and/or retracting the support arm (4) into the retracted sliding position (Z1) only when the folding position (A1, A2) is predominantly erect, when the gearbox (5) is shifted into the shift position (G2).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Several embodiments in which the present invention can be practiced are illustrated and described in detail, wherein like reference characters represent like components throughout the several views. The drawings are presented for exemplary purposes and may not be to scale unless otherwise indicated.

[0047] In the drawings:

[0048] FIG. 1(a) shows schematically a perspective view of an embodiment of a work implement according to the invention and set up for field operation;

[0049] FIG. 1(b), is a separate perspective view a drive train of the work implement;

[0050] FIG. 1(c) is a separate perspective view of a detail of an underside of the work implement;

[0051] FIG. 2 (a) shows schematically the work implement of FIG. 1, wherein an aggregate and/or a gearbox is/are shown in different settings and/or positions, with this being a first flat position for transferring the work implement to road operation;

[0052] FIG. 2 (b) shows schematically the work implement of FIG. 1, wherein an aggregate and/or a gearbox is/are shown in different settings and/or positions, with this being a second intermediate position for transferring the work implement to road operation;

[0053] FIG. 2 (a) shows schematically the work implement of FIG. 1, wherein an aggregate and/or a gearbox is/are shown in different settings and/or positions, with this being a third folded position for transferring the work implement to road operation;

[0054] FIG. 3 (a) shows schematically a perspective view of the work implement of FIG. 1 set up for road operation;

[0055] FIG. 3 (b) shows a perspective view of a drive train of the work implement;

[0056] FIG. 3 (c) is a perspective view of a detail of an underside of the work implement; and

[0057] FIG. 4 shows an enlarged detail of the drive train of the work implement of FIG. 1.

[0058] An artisan of ordinary skill in the art need not view, within isolated figure(s), the near infinite number of distinct permutations of features described in the following detailed description to facilitate an understanding of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[0059] The present disclosure is not to be limited to that described herein. Mechanical, electrical, chemical, procedural, and/or other changes can be made without departing from the spirit and scope of the present invention. No features shown or described are essential to permit basic operation of the present invention unless otherwise indicated.

[0060] FIGS. 1 (a), 1 (b), and 1(c) show an agricultural work implement 1, which is configured here as a mowing machine. In the following, the terms work implement 1 and mowing machine are therefore used synonymously. However, the present invention is also applicable to other agricultural work implements 1, for example, to haymaking machines such as tedders or windrowers.

[0061] The work implement 1 has an attachment frame 2, which is provided for attachment to a towing vehicle (not shown), for example, a tractor or hauler or a self-propelled harvesting machine, such as, in particular, a forage harvester or a baler. The attachment frame 2 allows the agricultural work implement 1 to be attached to the towing vehicle, in particular to a lifting mechanism of the towing vehicle. In the attached state, it is carried by the towing vehicle. The present invention is, however, also applicable to other agricultural work implements that are towed by the towing vehicle and for this purpose are coupled to the towing vehicle, for example, via a drawbar.

[0062] The work implement 1 has an aggregate 3 attached to a support arm 4 on both sides of the attachment frame 2. The two aggregates 3 are arranged mirror-symmetrically to a center plane (not shown), which center plane is spanned by a line extending in a direction of travel 91 and a line extending in an upward direction 93. The following explanations apply to both aggregates 3, wherein they are initially described in the framework of FIG. 1 (a) on the basis of only one of the aggregates 3.

[0063] The support arm 4, on which the aggregate 3 is arranged, is hinged to the attachment frame 2 so as to be pivotable about a pivot axis 41. In addition, the support arm 4 is configured to be alterable in length in an extraction direction 43. For this purpose, it is configured to be telescopic and comprises, in particular, two sections that are shiftable into one another.

[0064] The support arm 4 can be telescopically shifted from a retracted sliding position Z1 to an extended sliding position Z3. In addition, it can be folded by pivoting in pivot direction 42 about pivot axis 41 from a flat position A3, in which it is arranged approximately parallel to the ground, into an erect folding position A1, in which it extends approximately in the upward direction 93, or at a (small) acute angle to the latter.

[0065] In the flat position A3 of the aggregate 3, the support arm 4 extends substantially in a longitudinal direction 92, which is arranged transversely to the direction of travel 91 and transversely to the vertical upward direction 93. On flat terrain, it is therefore oriented approximately horizontally or, in any case, extends only at a (small) acute angle to the horizontal. The aggregate 3 in flat position A3 is, therefore, also aligned approximately parallel to the ground.

[0066] A position of the aggregate 3 is changeable by pivoting and/or telescoping the support arm 4.

[0067] The aggregate 3 is schematically shown in FIG. 1 (a) in a field configuration F intended for field operation. For the sake of clarity, only a detail of the aggregate 3 is shown in FIG. 1 (a).

[0068] In the field configuration F of the aggregate 3, the support arm 4 is pivoted into the flat position A3 and is reversibly shiftable from the retracted sliding position Z1 into the extended sliding position Z3. The aggregate 3 is then cantilevered to the side. In the flat position A3 of the support arm 4, the aggregate is guided over the ground for cutting harvest material.

[0069] During telescoping of the support arm 4, the aggregate 3 is shifted in the extraction direction 43 towards the attachment frame 2 or shifted against the extraction direction 43 away from the attachment frame 2. By telescoping the support arm 4, a working width (not specified) of the work implement 1 can therefore be adjusted.

[0070] The extended sliding position Z1 refers to the position in which the support arm 4 is telescoped to a maximum length. The retracted sliding position Z3 refers to the position in which the support arm 4 is telescoped to a minimum length. Thus, the work implement 1 in the flat position A3 is advantageously adjustable from the minimum working width by telescoping the support arm 4 in the extraction direction 43 to the maximum working width and is resettable by telescoping against the extraction direction. In FIG. 1 (a), the support arm 4 is in the extended sliding position Z3, such that FIG. 1 (a) shows the work implement 1 at maximum working width.

[0071] FIG. 1 (b) shows a drive train of the work implement 1 in a view detached from the attachment frame 2. FIG. 1 (c) shows a detail of the work implement 1 with the drive train on an underside (not indicated) of the attachment frame 2.

[0072] To drive the aggregate 3, the work implement 1 comprises a drive train comprising a gearbox 5 that can be connected to a power take-off shaft (not shown) of the towing vehicle in a power-receiving manner. The gearbox 5 is provided for transmitting power to the aggregates 3 and is arranged substantially centrally between the aggregates 3 on a side (not shown) of the attachment frame 2 facing away from the towing vehicle.

[0073] To connect the drive train to the power take-off shaft, the work implement 1 comprises a connection shaft 6. An input shaft 52, which is configured to be telescopic, connects the connection shaft 6 to the gearbox 5. For this purpose, the gearbox 5 comprises a drive shaft 57 to which the input shaft 52 is connected. On the output side of the gearbox 5, the drive train comprises one output shaft 53 for each of the aggregates 3, which output shaft is connected to the respective aggregate 3 such that the aggregate can be driven via the output shaft 53. In the present embodiment of the work implement 1, the drive train has two output shafts 53 to drive the two aggregates 3. In order to be able to telescope the support arm 4, the output shafts 53 are telescopic. In a home position G1 of the gearbox 5, the output shafts 53 extend substantially in or against the longitudinal direction 92, and, therefore, substantially transverse to the direction of travel 91. For this purpose, the gearbox 5 is configured here as a T-gearbox, in which the output shafts 53 are connected to the gearbox 5 transversely to the input shaft 52. The output shafts 53 are respectively connected to pinion shafts (not shown) of the gearbox 5. The connections of the shafts 6, 52, 57, and 53 of the drive train are respectively formed by universal joints (not shown). The universal joints are provided for angular compensation between shafts 6, 52, 57, and 53.

[0074] When the drive train is connected to the power take-off shaft, the connection shaft 6 and the input shaft 52 are rotated when the power take-off shaft is driven, and the gearbox 5 is therefore driven. The output shafts 53 thereby also rotate such that the aggregates 3 are driven in an in-service mode of the gearbox 5. The gearbox 5 is switchable to an out-of-service mode in which the drive shaft 57 and the pinion shafts of the gearbox 5 are decoupled from each other such that the pinion shafts are not driven when the drive shaft 57 is driven. Instead of such a switchable gearbox 5, it is also preferred to provide a disconnect coupling (not shown) in the driveline to decouple the output shaft 53 from the power take-off shaft, in particular in the area of the input shaft 52.

[0075] In field operation, the gearbox 5 is arranged in the home position G1, in which it is provided to drive the aggregate 3. It can manually be reversibly switched from in-service mode to out-of-service mode. In addition, the work implement 1 is configured to switch the gearbox 5 to the out-of-service mode when the support arm 4 is folded up from the flat position A3 to the erect folding position A1, if it exceeds an intermediate position A2, in particular, a headland position.

[0076] In order to be able to transport the work implement 1 on the road, the aggregates 3 are adjustable from the field configuration F to a transport configuration T. To ensure that the work implement 1 does not exceed the permissible width of vehicles on the road, the support arm 4 is folded into the erect folding position A1 in the transport configuration T of the aggregate 3. In the extended sliding position Z3 and the erect folding position A1 of the support arm 4, the work implement 1 moreover exceeds the permissible height of vehicles on the road. To ensure that the work implement 1 does not exceed the permissible height, the support arm 4 is retracted in the transport configuration T of the aggregate 3. Since the pivot axis 41 of the support arm 4 is offset from the universal joints 50 of the output shaft 53, a compensation of the length of the output shaft 53 must take place for folding up and/or retracting, which can lead to inadmissible compression or lengthening of the output shaft 53.

[0077] In order to prevent this, for setting up road operation, the gearbox 5 is reversibly shiftable relative to the attachment frame 2 in a shift direction 51 to a shift position G2. FIG. 1 (c) shows the driveline with the gearbox 5 shifted slightly in shift direction 51 relative to home position G1. In this illustration, the gearbox 5, therefore, has not yet reached shift position G2.

[0078] The input shaft 52 is rotatably mounted in a stationary bearing 521 on the attachment frame 2 at its end opposite the gearbox 5.

[0079] When the gearbox 5 is shifted from the home position G1 to the shift position G2, the input shaft 52 is lengthened by telescoping in the shift direction 51, and when the gearbox 5 is shifted back from the shift position G2 against the shift direction 51 to the home position G1, it is shortened. In the home position G1, it is preferably retracted to its minimum intended length and provided for power transmission to the aggregate 3 via the gearbox 5 and the output shaft 53.

[0080] During shifting, the gearbox 5 is guided by guiding elements 54, which extend in the shift direction 51. For this purpose, the guiding elements 54 are configured as struts, each of which is shiftably mounted in a guide bearing 55. The guiding elements 54 are here fastened to the gearbox 5, and the guide bearing 55 to the attachment frame 2. However, an embodiment can also be used in which the guiding elements 54 are arranged on the attachment frame 2 and the guide bearing 55 on the gearbox 5.

[0081] An actuator 56 is provided for shifting the gearbox 5, which actuator is configured here as a hydraulic cylinder. Another actuator 56 can, however, also be used, such as a linear motor.

[0082] The actuator 56 is operated by an electrical control device 8, which is arranged in the attachment implement 1. In principle, an electrical control device 8 of the towing vehicle can also be used. The electrical control device 8 is also provided for switching the gearbox 5 from in-service mode to out-of-service mode.

[0083] By shifting the gearbox 5, an angle of the output shaft 53 respectively changes relative to the pinion shaft of the gearbox 5 to which they are connected. This angle change is possible due to the universal joint 50.

[0084] In order to be able to transfer the work implement 1 from field operation to road operation reliably, quickly and easily for the operator, the electrical control device 8 is configured to detect current positions A1 to A3, Z1 to Z3 of the support arm 4 and/or a current position G1, G2 of the gearbox 5. The electrical control device 8 is, moreover, configured to control the adjustment of the support arm 4 and/or the gearbox 5. When transferring the aggregate 3 from the field configuration F to the transport configuration T, the telescoping and/or pivoting of the support arm 4 and/or the adjustment of the gearbox 5 can take place in different sequences as a function of the detected positions A1, A2, A3, Z1, Z2, Z3 of the support arm 4 and/or the detected position G1, G2 of the gearbox 5. In this manner, this prevents, on the one hand, inadmissible compression or lengthening of the output shaft 53. The transfer can be carried out as quickly as possible and can also be automated, and therefore as simple as possible for the operator. For reasons of safety for persons in the vicinity of the work implement 1, the control device 8 can be configured to prevent the setting up of the road operation until the gearbox 5 has been switched to the out-of-service mode.

[0085] Once again, for adjusting the aggregate 3, the work implement 1 comprises actuators (not shown) which are controllable by the electrical control device 8. Moreover, it comprises sensors 81, 82 for detecting the current positions A1 to A3, Z1 to Z3 of the support arm 4, and the position G1, G2 of the gearbox G.

[0086] A first sensor 81 is provided to detect the home position G1 of the gearbox 5. For this purpose, the first sensor 81 is arranged opposite the gearbox 5 on the attachment frame 2. By way of example, it can be configured as a proximity sensor and can, for example, inductively or magnetically detect the approach of the gearbox 5 to the attachment frame 2. A second sensor 82 is arranged on one of the guide bearings 55 and is provided for detecting the shift position G2 of the gearbox 5. This second sensor 82 too can be configured as a proximity sensor for this purpose and, for example, inductively or magnetically detect whether or not the guiding element 54 is arranged in its proximity range.

[0087] The current position A1, A2, Z1, Z2 of the support arm 4 can be detected, for example, by means of the shifting paths of the respective actuators, and/or by means of further sensors (not shown).

[0088] Starting from the work implement 1 shown in FIG. 1 (a) to FIG. 1 (c), which is in field operation, FIG. 2 (a) to FIG. 2 (c) show adjustment operations in a possible sequence for transferring the work implement 1 to road operation. FIG. 3 (a) shows the work implement 1 in road operation.

[0089] FIG. 2 shows the work implement 1 from FIG. 1, with the aggregate 3 raised to an intermediate position A2, here, in particular, a headland position. The headland position V enables contactless guidance of the aggregate 3 over the ground in the headland and/or when driving into the crop. For this purpose, the support arm 4 is pivoted upward relative to the flat position A3. In so doing, it is arranged between the flat position A3 and the folding position A1. In this intermediate position A2, the gearbox 5 is switched to the out-of-service mode such that the aggregate 3 is no longer driven.

[0090] In addition, the support arm 4 is here already at least partially retracted from the extended sliding position Z1 into an intermediate position Z2. It is thus positioned between the extended sliding position Z3 and the retracted sliding position Z1. The work implement 1 is thereby, as before, in a configuration that is usual for field operation.

[0091] The intermediate positions A2, Z2 are selected here in such a way that the output shaft 53 is shortened to a minimum length. To avoid a compression of the output shaft 53, the gearbox 5 is shifted in a next step to the shift position G2. FIG. 2 (b) shows the work implement 1 with gearbox 5 shifted to shift position G2.

[0092] It is visible that the output shaft 53 is lengthened by adjusting the gearbox 5. In so doing, a compression of the output shaft 53 when the support arm 4 is folded up and/or shifted in further can reliably be avoided.

[0093] Since the gearbox 5 is arranged here in shift position G2, the sequence in which the support arm 4 is subsequently adjusted is freely selectable. Starting from the intermediate positions A2, A3 shown in FIG. 2 (b), it can, therefore, first be folded up into the erect folding position A1 when the gearbox 5 is arranged in shift position G2. This is shown in FIG. 2 (c). Finally, the support arm 4 is retracted into the retracted sliding position Z1. The aggregate 3 is then in the transport configuration T, and the work implement 1 is set up for road operation. This is shown in FIG. 3 (a).

[0094] Alternatively, starting from the intermediate positions A2, A3 shown in FIG. 2 (b), the support arm 4 can also first be retracted into the retracted sliding position Z1 with the gearbox 5 arranged in shift position G2, and then folded up into the erect folding position A1.

[0095] Compared to the sequence shown here, the work implement 1 can also be transferred even more quickly from field operation to road operation if the support arm 4 is folded up and the gearbox 5 is shifted in an at least partially simultaneous manner. For this to happen, a length of the support arm 4 must be greater than a limit length, and a pivoting angle of the support arm 4 relative to the flat position A3 must be less than or equal to a limit angle.

[0096] To set up road operation, the support arm 4 can be pivoted and/or telescoped further from the intermediate positions A2, Z3, in particular until the aggregate 3 is adjusted in the transport configuration T (see FIG. 2). This prevents damage to the output shaft 53 due to buckling and/or compression.

[0097] The electrical control device 8 is configured to select the optimum sequence based on the detected positions A1 to A3, Z1 to Z3 of the support arm 4, and the detected position G1, G2 of the gearbox 5 and to control the actuators 56 in this sequence.

[0098] FIG. 3 (a) shows the work implement 1 set up for road operation. FIG. 3 (b) shows the drive train of the work implement 1 set up for road operation, and FIG. 3 (c) shows a detail from below of the work implement 1 set up for road operation. For this purpose, the aggregate 3 is adjusted to transport configuration T and the gearbox 5 to shift position G2. In the transport configuration T, the aggregate 3 is erect such that it reaches more or less in the upward direction 93, or at a (small) acute angle thereto. The gearbox 5 is spaced from the attachment frame 2 in the shift position G2.

[0099] By shifting the gearbox 5 into the shift position G2, the output shafts 53 are lengthened relative to their minimum length. To do this, the actuator 56 is extended, and the input shaft 52 is telescoped to a length, in particular to the maximum length. In so doing, the guiding elements 54 are shifted in the guide bearings 55. As a result, the first sensor 81 can no longer detect a gearbox 5, and the second sensor 82 can no longer detect a guiding element 54. The electrical control device 8 uses the signal from the second sensor 82 to determine that the gearbox has shifted to the shift position G2.

[0100] FIG. 4 shows an enlarged detail of the drive train of the embodiment of FIG. 1 (c). Here, the gearbox 5 is arranged in a position in which it is at least partially adjusted away from the attachment frame 2. It is, therefore, in an intermediate position (not designated) between the home position G1 and the shift position G2. The actuator 56 provided for shifting the gearbox 5 is at least partially extended for this purpose.

[0101] The two guiding elements 54 arranged on the gearbox 5 are visible. They are shiftably arranged in the guide bearings 55 provided for guidance such that they can be shifted relative to the attachment frame 2, and they serve to guide the gearbox 5 in and/or against the shift direction 51.

[0102] In order to prevent the gearbox 5 from rotating together with the input shaft 52 when the input shaft rotates, coupling elements 71, 72 are provided on the attachment frame 2 and on the gearbox 5. A first coupling element 71 is configured as a pin, and a second coupling element 72 as a through hole. In the home position G1 of the gearbox 5, the pin 71 passes through the through hole 72. In so doing, the gearbox 5 can be supported on the attachment frame 2. When the gearbox 5 is shifted to the shift position G2, the pin 71 is pulled out of the through hole 72. However, the first sensor 81 of the control device 8 indicates the removal of the gearbox 5 such that the gearbox 5 can be switched, in good time, to the out-of-service mode by the control device 8.

[0103] The invention is not limited to the above-described exemplary embodiment. A person skilled in the art can modify the exemplary embodiment in a manner, which appears suitable by using the available specialist knowledge in order to adapt it to a specific application.

[0104] From the foregoing, it can be seen that the present invention accomplishes at least all of the stated objectives.

LIST OF REFERENCE CHARACTERS

[0105] The following table of reference characters and descriptors are not exhaustive, nor limiting, and include reasonable equivalents. If possible, elements identified by a reference character below and/or those elements which are near ubiquitous within the art can replace or supplement any element identified by another reference character.

TABLE-US-00001 TABLE 1 List of Reference Characters  1 Agricultural work implement  2 Attachment frame  3 Aggregate  4 Support arm  5 Gearbox  6 Connection shaft  8 Electrical control device 41 Pivot axis 42 Pivot direction 43 Extraction direction 50 Universal joint(s) 51 Shift direction 52 Input shaft 53 Output shaft(s) 54 Guiding elements 55 Guide bearing(s) 56 Actuator 57 Drive shaft 71 First coupling element 72 Second coupling element 81 First sensor 82 Second sensor 91 Direction of travel 92 Longitudinal direction 93 Upward direction 521  Stationary bearing A1  Folding position A2  Intermediate position A3  Flat position F Field configuration G1  Home position G2  Shift position T Transport configuration V Headland position Z1 Retracted sliding position Z2 Intermediate position Z3 Extended sliding position

Glossary

[0106] Unless defined otherwise, all technical and scientific terms used above have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of the present invention pertain.

[0107] The terms “a,” “an,” and “the” include both singular and plural referents.

[0108] The term “or” is synonymous with “and/or” and means any one member or combination of members of a particular list.

[0109] The terms “invention” or “present invention” are not intended to refer to any single embodiment of the particular invention but encompass all possible embodiments as described in the specification and the claims.

[0110] The term “about” as used herein, refers to slight variations in numerical quantities with respect to any quantifiable variable. Inadvertent error can occur, for example, through the use of typical measuring techniques or equipment or from differences in the manufacture, source, or purity of components.

[0111] The term “substantially” refers to a great or significant extent. “Substantially” can thus refer to a plurality, majority, and/or a supermajority of said quantifiable variable, given proper context.

[0112] The term “generally” encompasses both “about” and “substantially.”

[0113] The term “configured” describes a structure capable of performing a task or adopting a particular configuration. The term “configured” can be used interchangeably with other similar phrases, such as constructed, arranged, adapted, manufactured, and the like.

[0114] Terms characterizing sequential order, a position, and/or an orientation are not limiting and are only referenced according to the views presented.

[0115] The “scope” of the present invention is defined by the appended claims, along with the full scope of equivalents to which such claims are entitled. The scope of the invention is further qualified as including any possible modification to any of the aspects and/or embodiments disclosed herein which would result in other embodiments, combinations, subcombinations, or the like that would be obvious to those skilled in the art.