Towed agricultural machinery and method for weight shifting of an agricultural machinery

Description

[0001] The invention relates to a towed agricultural machine for soil cultivation and / or for spreading agricultural material. The invention also relates to a method for weight transfer on a towed agricultural machine.

[0002] Regarding the prior art, reference can initially be made to WO 2023 / 093924 A1, which discloses an agricultural tillage implement comprising a central frame with a coupling mechanism designed for attachment to a towing device with a bracket, as well as wings rotatably mounted on the central frame, sections of working units rotatably attached to the wings, the sections consisting of at least one series of working units, at least one wheel attached to the wing by a rotary locking mechanism, and support rods rotatably attached to the wings and connected to the bracket. The running wheels are rotatably attached to the wings at their end section. The running wheels ensure the movement of the agricultural implement, which is connected to the towing device via the coupling mechanism.The bicycles are attached to the wings by means of a rotary locking mechanism, which allows the bicycles to rotate relative to the agricultural implement, whereby the angle between the axis passing through the center of the bicycles and the central axis of the agricultural implement changes during this rotation. Further reference to the general prior art can be made to WO 2023 / 093925 A1, US 2017 / 318734 A1 and US 2017 / 318733 A1.

[0003] In agriculture, agricultural machinery is used for soil cultivation and / or the application, i.e., the sowing of agricultural crops, and is often designed as a tractor-drawn implement. The development and construction of such machinery must consider both agronomic aspects during fieldwork and legal aspects related to road transport. For fieldwork on arable land, to protect the soil and ensure even cultivation, a uniform weight distribution across all tillage and / or seeding implements, or a significant reduction in the weight distribution across these implements, is generally desirable.For road transport, however, the weight distribution must be designed so that the support loads and axle loads do not exceed the legally prescribed maximum values ​​and do not fall below the minimum values. The difficulties in complying with these values ​​increase accordingly with the increasing working width of the machinery.

[0004] An agricultural machine with optimized weight distribution was disclosed, for example, by DE 10 2021 104 383 A1. To improve the weight distribution of the machine during both field work and road transport, the relative position of at least one wheel of the machine's chassis relative to a frame structure can be changed with respect to the direction of travel.

[0005] A disadvantage of this system is that changing the relative position requires a complex swivel mechanism. Another drawback is that the known weight shift only allows for a relocation of the respective loads within the machine. This means that the system can only be used with machines of limited overall weight, specifically with a maximum axle load of 10 tons and a maximum support load of 3 tons, which in turn limits the maximum working width of the machine.

[0006] The object of the invention is therefore to eliminate the described disadvantages of the prior art. In particular, a work machine with a large overall weight is to be created in which a desired weight distribution is achieved both during road travel and during field work.

[0007] These problems are solved by an agricultural machine for soil cultivation and / or for spreading agricultural material with the features of independent claim 1, and by a method for weight transfer on an agricultural machine with the features of method claim 13. Advantageous embodiments and further developments of the invention are disclosed in the claims and the following description with partial reference to the figures.

[0008] According to a first aspect of the invention, a towed agricultural work machine is provided for soil cultivation and / or for the application of agricultural distribution material (e.g. seeds, fertilizer and / or the like).

[0009] The working machine comprises a frame structure which has a towing device at one front and a chassis at one rear, wherein the towing device is configured to receive an operating tractive force of a tractor in the direction of travel and / or to transfer an operating support load of the working machine to the tractor, wherein the chassis has at least two support devices which are provided for transferring an operating wheel load of the working machine to the ground, wherein a coupling device is arranged on the frame structure at the rear, preferably behind the chassis in the direction of travel, on which a soil cultivation and / or seeding device having a support frame is received.

[0010] To create a working machine with a large overall weight, in which a desired weight distribution is achieved both during road travel and field work, the working machine according to the invention provides a support wheel device arranged at the rear of the soil cultivation and / or seeding device.

[0011] As a result of the additional support wheel device according to the invention, the operating support load and / or the operating wheel load of the working machine can thus be changed as desired both during road travel (e.g. transport position) and during field work (e.g. working position) and adapted to the required and / or permissible minimum loads and maximum loads.

[0012] The machine according to the invention is therefore characterized in particular by the fact that the total weight of the machine can be transferred proportionally to the ground in the form of an operating support load, an operating wheel load and a support wheel load absorbed by the support wheel device.

[0013] In particular, the arrangement of the chassis and the support wheel device according to the invention allows sufficient operating support force to be achieved without having to add additional weights to the front of the frame construction and / or the towing device.

[0014] The operating tractive force is preferably defined by a tractive force that a tractor transmits to the working machine for its movement.

[0015] The support wheel assembly is pivotably mounted on the support frame in an upright position between a ground contact position and a non-ground contact position. This pivoting is effected by an actuating device, preferably one that can be controlled and / or regulated by a control unit. Preferably, the pivoting of the support wheel assembly by the actuating device is dependent on whether the machine is performing field work or has been, or is about to be, moved into a transport position for road travel. The actuating device can be operated automatically by a control unit and / or remotely controlled manually by an operator using the control unit.By pivoting the support wheel assembly using the actuating device, the support wheel assembly can be moved into a desired position, and the transfer of the total weight of the machine to the ground can be influenced.

[0016] According to a further development of the invention, to transfer the soil cultivation and / or seeding device into a transport position or into a working position, it can be provided that the coupling device is assigned an actuator device, preferably controllable and / or adjustable by means of a control device, wherein the actuator device is configured to change the height position and / or the angular position of the soil cultivation and / or seeding device relative to the frame construction.

[0017] To create a working machine that can be coupled with a wide variety of tillage and / or seeding implements, the coupling device is preferably designed as a three-point linkage or a four-point linkage (e.g., parallelogram). Furthermore, the actuator can be formed by at least one top link cylinder, preferably hydraulically actuated by a control device, and / or by at least one (but preferably two), preferably hydraulically actuated by a control device, lower link cylinder. In a three-point linkage, the top link cylinder can, for example, form a top link, and the lower link cylinder can be coupled to and / or form at least one lower link arm. In a four-point linkage, the top link can, for example, be coupled to or form the upper arms of a parallelogram, and the lower link cylinder can, for example,be coupled to or form the lower wing arms of a parallelogram.

[0018] The actuating device is preferably configured to exert a preload force on the support wheel assembly in the ground contact position, preferably such that the coupling device is relieved of stress and / or the operating wheel load of the chassis is reduced and / or the operating support load is increased. This can preferably be carried out accordingly in both the working and transport positions. Thus, the respective load can preferably be selectively increased or decreased.

[0019] To achieve sufficient preload force on the support wheel assembly, a further development of the invention provides that the control device is formed by an electro-hydraulic system and the actuating device is formed by at least one hydraulically actuated cylinder that is part of the electro-hydraulic system. The electro-hydraulic system can, in particular, include a limiting device configured to limit the preload force of the support wheel assembly. The limiting device can, for example, be formed by at least one spring accumulator and / or a shut-off valve and / or a pressure relief valve and / or a pressure regulating valve and be configured to limit the preload force of the support wheel assembly.

[0020] Alternatively or additionally, the preload force of the support wheel device can be limited by means of a mechanical coil spring.

[0021] To create a working machine with a large working width, the support frame can be formed by a central section and two side sections pivotable about horizontal longitudinal axes relative to the central section by means of an actuating device, preferably controllable and / or adjustable by means of a control unit, wherein the soil cultivation and / or seeding device is mounted, in particular, on the side sections and / or on the central section. The actuating device can preferably be formed by one or more hydraulically actuated cylinders.

[0022] According to a preferred embodiment, the control unit is configured to control and / or regulate the actuating device and / or the positioning device such that, in the working position of the machine, the support wheel assembly is pivoted into a position not in contact with the ground, and the side sections are pivoted into a position at least largely horizontal to the central section. Preferably, the vertical position of the side sections ensures that the tillage and / or seeding unit is in contact with the ground. This ensures, in particular, that the respective tillage and / or seeding units bear a sufficient load to, for example, adequately reconsolidate the soil surface.

[0023] Alternatively or additionally, the control device is configured to control and / or regulate the actuating device and / or the positioning device in such a way that, in the transport position of the machine, the support wheel assembly is pivoted into a ground contact position and the side sections are pivoted into a position at least largely perpendicular to the central section. This ensures, in particular, that the operating wheel load of the machine, due to the load absorbed by the support wheel, does not exceed a permissible maximum operating wheel load of, for example, 10 tons.

[0024] To selectively reduce the loads acting on the respective tillage and / or sowing equipment during the working position, a further development of the invention suggests that the control device is configured to control and / or regulate the actuating device and / or the positioning device in such a way that, in the working position of the machine, the support wheel assembly is pivoted into a ground contact position and the side sections are pivoted into a position that is at least largely horizontal to the central section. It is preferable that a preload force of the support wheel assembly can be controlled and / or regulated accordingly, and in particular, adjusted to a desired level.

[0025] An at least largely vertical or horizontal position of the side parts relative to the central part is preferably defined by a position of the soil cultivation and / or sowing device relative to the soil, i.e. relative to the soil surface.

[0026] A compact design of the machine can provide that, in the working position, the support wheel assembly is located above the central section, particularly above the tillage and / or seeding unit, and that, in the transport position, the support wheel assembly is located behind the central section with respect to the direction of travel, particularly behind the tillage and / or seeding unit and / or between the side sections pivoted perpendicular to the central section. Preferably, in the working position, the support wheel assembly does not project beyond the tillage and / or seeding unit to the rear in the direction of travel.

[0027] To create a working machine that complies with legal requirements, a preferred embodiment of the invention may provide that the control device is configured to control and / or regulate the actuating device and the actuator device in a coordinated manner, preferably such that the operating wheel load of the chassis does not exceed a maximum permissible value and / or that the operating support load does not fall below a minimum required value.

[0028] To prevent uncontrolled movements of the support wheel assembly or the tillage and / or seeding equipment, stroke limiting elements may be assigned to the operating device and / or the actuator, preferably in the transport position. In particular, the stroke limiting elements may be formed by mechanical stops and / or insert elements or the like.

[0029] Preferably, the support wheel assembly is formed by a swivel frame and a running wheel assembly, wherein the running wheel assembly is preferably formed by a single wheel or a twin wheel arrangement and / or a tandem arrangement and / or wherein the running wheel assembly is preferably pivotably mounted on the swivel frame about an upright oriented axis.

[0030] It should be noted that, according to the present description, the definition of wheel also includes crawler tracks or the like.

[0031] In order to provide a working machine which enables, for example, soil cultivation and the distribution of agricultural material in a single pass, a preferred embodiment may provide that a storage container is assigned to the frame construction, which is equipped for carrying and providing agricultural material for the seeding device.

[0032] To enable more precise adjustment of the operating wheel load and / or the operating support load, a further development of the invention allows for the relative position of the chassis, in particular the relative position of at least one support device of the chassis, to be changed with respect to the direction of travel. Preferably, this change can be achieved such that the at least one support device can assume a forward relative position and a rear relative position with respect to the direction of travel.

[0033] In the context of the invention, the control device mentioned in relation to the respective embodiments is the same control device, in particular a common, central control device of the agricultural machine. The control device comprises, for example, at least one computer unit, an on-board computer, and / or the like, and also includes a control and / or regulation circuit, in particular a hydraulic and / or pneumatic and / or electrical control and / or regulation circuit, wherein the control and / or regulation circuit is expediently designed for hydraulic and / or pneumatic and / or electrical signal and / or command transmission. This signal and / or command transmission can also be wireless (e.g., via WLAN). In particular, the control device comprises all components for hydraulic and / or pneumatic and / or electrical signal and / or command and / or movement transmission.

[0034] It should be noted that the terms "control," "regulation," and "control device" can refer to electronic, pneumatic, and / or hydraulic controls or regulators, which, depending on their design, can perform control and / or regulation tasks. Even though the term "control" is used here, it can also appropriately include "regulation." Likewise, the use of the term "regulation" can also imply "control."

[0035] In the context of the invention, the definition of "rear end" particularly includes a rear section of the frame structure. Similarly, the definition of "rear end" includes a rear section of the tillage and / or seeding device.

[0036] The invention further relates to a method for weight transfer on a towed agricultural machine for soil cultivation and / or for spreading agricultural material, with a frame construction which has a towing device at a front and a chassis at a rear, wherein a coupling device is arranged on the frame construction at the rear, preferably behind the chassis in the direction of travel, on which a soil cultivation and / or sowing device having a support frame is received.

[0037] The method comprises absorbing an operating tractive force from a tractor in the direction of travel and / or transferring an operating support load from the working machine to the tractor by means of the towing device. Furthermore, the method comprises transferring an operating wheel load of the working machine to the ground by means of at least two support devices forming the undercarriage.

[0038] The method is characterized by a relief of the coupling device and / or a reduction of the operating wheel load of the chassis and / or an increase of the operating support load of the towing device by generating a preload force on a support wheel device arranged at the rear of the tillage and / or seeding device by means of an actuating device.

[0039] Further details and advantages of the invention are described below with reference to the accompanying drawings. The relative sizes of the individual elements in the figures do not always correspond to the actual relative sizes, as some shapes are simplified and others are enlarged for better illustration in relation to other elements. The figures show: Figure 1: A perspective view of a variant of a towed agricultural machine in a working position; Figure 2: A side view of the machine according to Figure 1 Figure 2 Legs Side view of the working machine according to the Figure 2A with a highlighted representation of the actuating device, Figure 3 a perspective view of the working machine according to the Figure 1 in a transport position, Figure 4 a side view of the working machine according to the Figure 3 Figure 5 shows a rear view of the working machine according to the Figure 3

[0040] The in the Figures 1 to 5 The embodiments shown are at least partially identical, so that similar or identical parts are provided with the same reference numerals and, to avoid repetition, reference is also made to the description of the other embodiments or figures for their explanation.

[0041] The Figures 1 to 5show different views of an embodiment of a towed agricultural machine 10, which are shown with common reference to the Figures 1 to 5 be described.

[0042] In particular, a process according to the present description can be carried out using the agricultural machine 10.

[0043] According to the Figure 1 and 2 The machine is shown in an unfolded working position and according to the Figures 3 to 5 in a folded transport position.

[0044] The machine 10 is designed as a trailed agricultural implement 10 for soil cultivation and / or for the application of agricultural material (e.g., seeds, fertilizer, or the like). For soil cultivation, the machine 10 is equipped with a rotary harrow 12, and for the application of agricultural material, a seed drill 14 is arranged behind the rotary harrow 12 in the direction of travel (VR) for seeding. The machine 10 can thus conveniently perform both soil cultivation and application in a single pass.

[0045] The working machine 10 comprises a frame structure 16, which has a towing device (e.g., in the form of a towing eye) 18 on one front side. The towing device 18 is configured to receive an operating tractive force FZ of a towing vehicle (not shown here), such as a tractor, in the direction of travel VR and / or to transfer an operating support load FS of the working machine 10 to the towing vehicle.

[0046] A storage container 34 is assigned to the frame structure 16 for carrying and providing the respective agricultural material to be applied by means of the tillage and / or seeding device 12; 14. The storage container 34 is expediently connected to the seed coulters of the seeding device 14 via a pneumatic line system, which is not shown here.

[0047] At the rear, that is, in a rear section, the frame structure 16 has a chassis 20, which chassis 20 has at least two support devices 22, or, according to the present embodiment, a plurality of support devices 22, in the form of wheels. In particular, the support devices 22 are provided for transferring an operating wheel load BR of the working machine 10 to the ground.

[0048] The support devices 22 are positioned at regular intervals across the entire working width of the machine 10 in front of the tillage and seeding units 12; 14 in the direction of travel FR. In addition to transmitting the operating wheel load FR, they are also designed for optimized weight distribution and reconsolidation of previously loosened soil on a field. In the transport position, only four support devices 22 are in contact with the ground, thus forming the chassis 20.

[0049] For the purpose of receiving, i.e., coupling, the soil cultivation and / or sowing device 12; 14 to the frame construction 16, a coupling device 24 is arranged on the rear side of the frame construction 16, preferably in the direction of travel VR behind the chassis 20.

[0050] The coupling device 24 is designed as a three-point linkage and comprises an upper coupling point, which is formed by a top link, and two lower arms. Alternatively, instead of a three-point linkage, the coupling device could also be formed by a four-point linkage, e.g., in the form of a parallelogram.

[0051] To change the height and / or angle of the tillage and / or seeding unit 12; 14 relative to the frame structure 16 and accordingly to the ground, an actuator 50, preferably controllable and / or adjustable by means of a control unit, is assigned to the coupling device 24. The actuator 50 is expediently formed by at least one, or according to the exemplary embodiment by two, particularly hydraulically actuated, lower link cylinders, each of which is coupled to a rocker arm forming a lower link. Alternatively or additionally, the actuator could also be formed by at least one hydraulically actuated top link cylinder.

[0052] For mounting by the coupling device 24, the tillage and / or seeding device has a support frame 26. The support frame 26 comprises a central section 28 and two side sections 32 that are pivotable relative to the central section 28 about horizontal longitudinal axes 30. Each side section 32 is equipped with an actuating device 52, preferably controllable and / or adjustable by means of a control device. According to the exemplary embodiment, the tillage and / or seeding device 12; 14 is mounted on the side sections 32. According to the exemplary embodiment, the actuating device 52 comprises two cylinders, preferably hydraulically actuated, arranged between the central section 28 and each of the side sections 32 on the left and right sides of the central section 28.

[0053] To create a working machine 10, in which both during road travel, i.e. in a transport position (cf. Figures 3 to 5), as well as in fieldwork, i.e. in a work position (cf. Figure 1 and 2 ), in order to achieve a desired weight distribution, the machine 10 according to the invention provides a support wheel device 40 arranged at the rear, i.e. in a rear section, of the soil cultivation and / or sowing device 12; 14.

[0054] The support wheel assembly 40 is formed by a pivot frame 42 and a running wheel assembly 44. According to the exemplary embodiment, the running wheel assembly 44 is formed by two wheels in a twin-wheel arrangement. For improved mobility, i.e., better adaptability to uneven ground, it would also be conceivable for the running wheel assembly 44 to be pivotably mounted on the pivot frame 42 about an upright oriented axis.

[0055] The support wheel assembly is positioned in an upright direction between a ground contact position (cf. Figures 3 to 5) and a non-ground contact position (cf. Figure 1 and 2 ) pivotably mounted on the support frame 26, or on the central part 28 of the support frame 26. The pivoting is preferably effected by means of an actuating device 54, which can be controlled and / or regulated by means of a control device.

[0056] The actuating device 54 is preferably configured to exert a preload force on the support wheel assembly 40 in the ground contact position, preferably such that the coupling device 24 is relieved of stress and / or the operating wheel load FR of the chassis 20 is reduced and / or the operating support load FS is increased. In particular, increasing the operating support load FS can specifically increase the traction of a tractor unit, since increasing the operating support load FS in turn increases the axle load of the tractor unit.

[0057] The control and / or regulation of the actuating device 54 and / or positioning device 52 by means of the control device is expediently carried out such that in the working position of the working machine 10 the support wheel device 40 is pivoted into a non-ground contact position and the side parts 32 are pivoted into a position that is at least largely horizontal to the central part 28 and that in the transport position of the working machine 10 the support wheel device 40 is pivoted into a ground contact position and the side parts 32 are pivoted into a position that is at least largely perpendicular to the central part 28.

[0058] The pivoting of the support wheel assembly 40 is advantageously carried out such that, in the working position, the support wheel assembly 40 is located above the central section 28, in particular above the tillage and / or seeding unit 12; 14, and in the transport position, the support wheel assembly 40 is located behind the central section 28, in particular behind the tillage and / or seeding unit 12; 14. It is preferably provided that, in the working position, the support wheel assembly 40 does not project beyond the tillage and / or seeding unit 12; 14 in the direction of travel VR.

[0059] Although the invention has been described with reference to specific embodiments, it is apparent to a person skilled in the art that various modifications can be made without departing from the scope of the invention. Consequently, the invention is not intended to be limited to the disclosed embodiments, but rather to encompass all embodiments falling within the scope of the appended claims. Reference symbol list:

[0060] 10 work machine 40 Support wheel device 12 Soil cultivation equipment 42 Swivel frame 14 Seeding equipment 44 Wheel assembly 16 frame construction 18 Towing device 50 Actuator setup 20 chassis 52 Actuator 22 Support device 54 Actuating device 24 Coupling device 26 Support frame VR Direction of travel 28 Middle section 30 Longitudinal axis FZ Operating tractive force 32 side panel FS FR Operating support load, operating wheel load

Claims

1. Towed agricultural working machine (10) for soil cultivation and / or for discharging agricultural product for distribution, having a frame construction (16) which has a towing apparatus (18) on a front side and a chassis (20) on a rear side, wherein the towing apparatus (18) is configured to receive an operating towing force (FZ) of a traction machine in the direction of travel (VR) and / or to transmit an operating support load (FS) of the working machine (10) to the traction machine, wherein the chassis (20) has at least two support devices (22) which are provided for transmitting an operating wheel load (FR) of the working machine (10) to the ground, wherein a coupling device (24) is arranged on the frame construction (16) on the rear side, preferably behind the chassis (20) in the direction of travel (VR), on which coupling device a soil cultivation and / or sowing device (12; 14) having a carrier frame (26) is received, and having a support wheel device (40) arranged on the rear side of the soil cultivation and / or sowing device (12; 14), wherein the support wheel device (40) is mounted on the carrier frame (26) so as to be pivotable in an upright direction between a ground contact position and a non-ground contact position, wherein the pivoting is effected by means of an activating device (54), preferably open-loop and / or closed-loop controllable by means of a control device.

2. Working machine (10) according to Claim 1, characterized in that the coupling device (24) is assigned an actuator device (50) which can preferably be open-loop and / or closed-loop controlled by means of a control device, wherein the actuator device (50) is configured to change the height position and / or the angular position of the soil cultivation and / or sowing device (12; 14) relative to the frame construction (16).

3. Working machine (10) according to Claim 1, characterized in that the activating device (54) is configured to exert a prestressing force on the support wheel device (40) in the ground contact position, preferably in such a way that - the coupling device (24) is relieved of load, and / or - a reduction in the operating wheel load (FR) of the chassis (20) is carried out, and / or - an increase in the operating support load (FS) is carried out.

4. Working machine (10) according to Claim 3, characterized in that the control device is formed by an electrohydraulic system, and the activating device (54) is formed by at least one hydraulically actuated cylinder which is a constituent part of the electrohydraulic system, wherein the electrohydraulic system comprises a limiting device which is configured to limit the prestressing force acting on the support wheel device (40).

5. Working machine (10) according to one of the preceding claims, characterized in that the carrier frame (26) is formed by a central part (28) and two side parts (32) which are pivotable relative to the central part (28) about horizontal longitudinal axes (30) by means of an actuating device (52) which is preferably open-loop and / or closed-loop controllable by means of a control device, wherein the soil cultivation and / or sowing device (12; 14) is mounted, in particular, on the side parts (32) and / or on the central part (28).

6. Working machine (10) according to at least one of Claims 1 or 5, characterized in that the control device is configured for such open-loop and / or closed-loop control of the activating device (54) and / or of the actuating device (52), - in that, in the working position of the working machine (10), the support wheel device (40) is pivoted into a non-ground contact position, and the side parts (32) are pivoted into a position which is pivoted at least largely horizontally with respect to the central part (28), and / or - in that, in the transport position of the working machine (10), the support wheel device (40) is pivoted into a ground contact position, and the side parts (32) are pivoted into a position which is pivoted at least largely perpendicularly with respect to the central part (28), and / or - in that, in the working position of the working machine (10), the support wheel device (40) is pivoted into a ground contact position, and the side parts (32) are pivoted into a position which is pivoted at least largely horizontally with respect to the central part (28).

7. Working machine (10) according to Claim 6, characterized - in that, in the working position, the support wheel device (40) has a position above the central part (28), in particular above the soil cultivation and / or sowing device (12; 14), and / or - in that, in the transport position, the support wheel device (40) has, in relation to the direction of travel (VR), a position behind the central part (28), in particular behind the soil cultivation and / or sowing device (12; 14) and / or between the side parts (32) which are pivoted perpendicularly with respect to the central part (28).

8. Working machine (10) according to Claim 2, characterized in that the coupling device (24) is preferably designed as a three-point linkage or a four-point linkage and / or the actuator device (50) is preferably formed by at least - an upper link cylinder, in particular hydraulically activated by means of a control device, and / or - a lower link cylinder, in particular hydraulically activated by means of a control device.

9. Working machine (10) according to at least one of Claims 1 or 2, characterized in that the control device is configured to open-loop and / or closed-loop control the activating device (54) and the actuator device (50) in a manner matched to one another, preferably in such a way that the operating wheel load (FR) of the chassis (20) does not exceed a maximum permissible value and / or that the operating support load (FS) does not undershoot a minimum required value.

10. Working machine (10) according to at least one of Claims 1 or 2, characterized in that stroke limiting elements are assigned to the activating device (54) and / or to the actuator device (50), preferably in the transport position.

11. Working machine (10) according to one of the preceding claims, characterized in that the support wheel device (40) is formed by a pivoting frame (42) and a running wheel device (44), wherein the running wheel device (44) is formed by a single wheel or a twin wheel arrangement and / or a tandem arrangement, and / or wherein the running wheel device (44) is preferably mounted on the pivoting frame (42) so as to be pivotable about a vertically oriented axis.

12. Working machine (10) according to one of the preceding claims, characterized in that the frame construction (16) is assigned a storage container (34) which is configured to carry along and provide agricultural product for distribution for the sowing device (12; 14).

13. Method for shifting the weight on a towed agricultural working machine (10) for soil cultivation and / or for discharging agricultural product for distribution, having a frame construction (16) which has a towing apparatus (18) on a front side and a chassis (20) on a rear side, wherein a coupling device (24) is arranged on the frame construction (16) on the rear side, preferably behind the chassis (20) in the direction of travel (VR), on which coupling device a soil cultivation and / or sowing device (12; 14) having a carrier frame (26) is received, comprising - receiving an operating towing force (FZ) of a traction machine in the direction of travel (VR) and / or transmitting an operating support load (FS) of the working machine (10) to the traction machine by means of the towing apparatus (18), - transmitting an operating wheel load (FR) of the working machine (10) to the ground by means of at least two support devices (22) forming the chassis (20), and - relieving the load of the coupling device (24) and / or reducing the operating wheel load (FR) of the chassis (20) and / or increasing the operating support load (FS) of the towing apparatus (18) by generating a preloading force by means of an activating device (54) on a support wheel device (40) arranged on the rear side of the soil cultivation and / or sowing device (12; 14), wherein the support wheel device (40) is mounted on the carrier frame (26) so as to be pivotable in an upright direction between a ground contact position and a non-ground contact position, wherein the pivoting is effected by means of an activating device (54), preferably open-loop and / or closed-loop controllable by means of a control device.