Agricultural seed drill and method for operating a seed drill

Abstract

The invention relates to an agricultural seed drill (10) for dispensing seed over an area of agricultural land, having a row arrangement (12) comprising multiple coulter rows (14a–14c) which extend transversely to the travel direction (F) of the seed drill (10) and are mutually spaced in the travel direction (F) of the seed drill (10), each coulter row (14a–14c) having multiple seed coulters (16) which are positioned adjacent to one another and transverse to the travel direction (F) of the seed drill (10) and are mutually spaced on the respective coulter rows (14a–14c). The seed drill also has a coulter pressure adjustment device for adjusting the coulter pressure of the seed coulters (16) in the coulter rows (14a–14c).

Description

[0001] Agricultural seed drill and methods for operating a seed drill

[0002] The invention relates to an agricultural seed drill according to the preamble of claim 1 and a method for operating it according to the preamble of claim 11.

[0003] Agricultural seed drills are often equipped with several rows of coulters arranged one behind the other in the direction of travel, each row containing multiple seed coulters for sowing seeds on agricultural land. To ensure that seed drills with multiple coulter rows, for example, with three rows arranged in a row, comply with the maximum permissible transport dimensions for road transport, particularly the maximum permissible transport height, it is necessary to pivot and / or fold at least one of the coulter rows into a transport configuration that meets the permissible road transport dimensions.

[0004] In current technology, it is necessary for the operator to manually unlock each coulter row before moving the seed drill into transport mode. Only after this manual unlocking is the folding movement of the respective coulter row permitted, with the folding movement occurring under the influence of gravity as the coulter rows pivot. Similarly, to move the seed drill from transport mode to working mode, each coulter row that was folded in transport mode must be manually locked to secure it in its working position.

[0005] The previously described, known, and generally accepted practice of folding and / or unfolding a row of shares to comply with road transport dimensions has several disadvantages. Firstly, it necessitates the manual unlocking and / or locking of the respective shares.

[0006] The P24-047 coulter row is time-consuming and inconvenient because the process of bringing the seed drill into transport and / or working mode is delayed by manually unlocking and / or locking the coulter row. A seed drill operator must first leave the cab of a tractor pulling the seed drill and / or a self-propelled seed drill itself to lock and / or unlock the coulter row, thus causing delays in switching between transport and working modes.

[0007] Furthermore, manual unlocking and / or locking of the coulter row carries the risk of operator error, particularly by inexperienced operators, which can result in damage to the seed drill. Similarly, uncontrolled folding and / or unfolding of the coulter row due to gravity alone can cause damage to the seed drill, especially if the operation is faulty when moving the seed drill into transport and / or working mode, for example, by performing the wrong sequence of steps when moving the seed drill into transport and / or working mode.

[0008] The object underlying the invention is therefore to improve the process of bringing agricultural seed drills into a transport state and / or into a working state by simplifying the folding in and / or unfolding of at least one row of coulters of the seed drill.

[0009] The problem is solved with an agricultural seed drill of the type mentioned above, wherein the agricultural seed drill includes a folding device designed separately from the coulter pressure adjustment device and comprising at least one actively driven folding mechanism, which is designed to fold in at least one row of coulters, so that the space requirement of the row arrangement in a transport state of the seed drill is reduced.

[0010] The folding device, which is designed separately from the share pressure adjustment device and includes at least one actively driven folding mechanism, makes it possible to fold in and / or unfold the device.

[0011] P24-047 allows at least one row of coulters on the agricultural seed drill to be folded and / or unfolded without requiring manual unlocking and / or locking by the operator. Consequently, it is no longer necessary for the operator to leave the cab to manually lock and / or unlock the coulter row before folding and / or unfolding it when transferring the seed drill to transport and / or working mode. This significantly reduces operator comfort and efficiency when moving the seed drill to transport and / or working mode, as the time required for manual locking and / or unlocking is considerably reduced.

[0012] Furthermore, the folding mechanism, with at least one actively driven folding mechanism, prevents operator errors and / or damage to the seed drill caused by folding the respective coulter row. Firstly, the elimination of manual locking and / or unlocking significantly simplifies the operation of moving the seed drill into transport and / or working positions, thus considerably reducing the likelihood of operator errors by inexperienced operators and the resulting damage. Secondly, the actively driven folding mechanism eliminates the need for gravity to initiate the folding motion, ensuring controlled folding and / or unfolding and thus preventing damage caused by uncontrolled gravity.

[0013] The seed drill is preferably designed as a trailed seed drill, in particular as a seed drill with a large working width, for example, a working width between 6 m and 24 m. Furthermore, the seed drill can be designed as a mounted seed drill or as a self-propelled seed drill. The seed coulters of the seed drill are preferably designed as tine coulters, with each seed coulter potentially including a depth control roller and / or a press wheel. The folding mechanism of the seed drill is preferably

[0014] P24-047 is power-operated, for example, by a motor. In particular, the folding mechanism is hydraulically, pneumatically, and / or electrically driven. Preferably, the seed drill comprises at least two, and more preferably three, rows of coulters spaced apart in the direction of travel of the seed drill and arranged parallel to each other. The seed coulters of each row are preferably offset from the seed coulters of one or more adjacent rows.

[0015] In a preferred embodiment of the agricultural seed drill according to the invention, the at least one folding mechanism of the folding device is configured to effect a folding movement of the coulter row, in particular by rotating a coulter carrier of the coulter row that carries several seed coulters. The coulter row preferably comprises several coulter carriers arranged side by side transversely to the direction of travel of the seed drill, each carrying several seed coulters. Furthermore, the folding device comprises several folding mechanisms, each preferably assigned to a coulter carrier of the coulter row comprising several coulter carriers for rotating the respective coulter carrier. A coulter row can comprise one coulter carrier with several seed coulters arranged on the coulter carrier, or several coulter carriers arranged side by side transversely to the direction of travel of the seed drill, each with several seed coulters arranged on the coulter carriers.Preferably, each coulter carrier of a row comprising several coulter carriers is assigned a separate folding mechanism. In particular, each coulter carrier of a row comprising several coulter carriers has a separate folding mechanism. In particular, each row comprises at least two coulter carriers arranged side by side transversely to the direction of travel of the seed drill, each with several seed coulters arranged on the respective coulter carrier and a folding mechanism arranged on the respective coulter carrier.

[0016] In another preferred embodiment of the agricultural seed drill according to the invention, the at least one folding mechanism comprises a folding cylinder for actuating the folding mechanism, in particular for bringing about the folding movement of the coulter row, wherein the folding cylinder

[0017] P24-047 is preferably configured to rotate the share carrier of the share row by actuating the folding mechanism for folding the share row. If the share row comprises several share carriers, each with a folding mechanism, the folding device preferably includes a separate folding cylinder for each folding mechanism to actuate the respective folding mechanism in order to fold and / or unfold the entire share row by rotating the multiple share carriers of the respective share row. The rotation of the share carrier preferably causes it to perform a rotational movement about its longitudinal axis, so that the seed coulters arranged on the share carrier execute a folding movement along a folding path. The folding cylinder can be a double-acting cylinder. In particular, the folding cylinder can be designed as a hydraulic cylinder.Alternatively, the folding cylinder can also be designed as a pneumatic or electric cylinder. The folding cylinder preferably comprises a piston and a piston rod that can be extended from and retracted into the piston. The folding cylinder is preferably controllable, in particular by means of an electronic control device and / or a hydraulic control device and / or a hydraulic system of the seed drill. The coulter carrier is preferably rotated by extending and / or retracting the folding cylinder.

[0018] In a further preferred embodiment of the agricultural seed drill according to the invention, the at least one folding mechanism comprises a lever mechanism by means of which the folding mechanism for folding the coulter row is connected to the coulter row, in particular to the coulter carrier of the coulter row, wherein the lever mechanism is specifically configured to transmit a torque from the folding mechanism to the coulter row in order to effect the folding movement for folding the coulter row, in particular for rotating the coulter carrier of the coulter row. Preferably, the folding cylinder generates a force on the lever mechanism, wherein the lever mechanism is configured to exert a torque on the coulter carrier by means of the force of the folding cylinder, by which the coulter carrier is rotated. The torque is therefore generated in particular by the

[0019] P24-047 Folding cylinder generated and transferred from the folding cylinder to the share row, in particular to the share carrier of the share row, by means of the lever mechanism.

[0020] In a further development of the agricultural seed drill according to the invention, the lever mechanism of the folding mechanism comprises a folding lever for transmitting the torque, in particular generated by the folding cylinder, from the folding mechanism to the coulter carrier, wherein the folding lever is preferably attached at its first end to the folding cylinder and / or at its second end, in particular in a torsionally rigid manner, to the coulter carrier of the coulter row. Alternatively or additionally, the lever mechanism of the folding mechanism comprises a coulter pressure lever, which is configured to transmit a force acting on the coulter pressure lever, in particular generated by the coulter pressure adjustment device, to the folding mechanism, in particular to the folding cylinder and / or the folding lever. The first and second ends of the folding lever are preferably arranged opposite each other along the longitudinal extent of the folding lever.The lever mechanism is preferably composed of two separate levers, in particular the folding lever and the share pressure lever.

[0021] Preferably, the folding cylinder connects the coulter pressure lever, in particular a first end of the coulter pressure lever, to the folding lever, in particular to a first end of the folding lever, wherein the folding lever, in particular at its second end opposite the first end, is rigidly connected to the coulter carrier. Preferably, the lever mechanism with the folding lever and the coulter pressure lever and the folding cylinder of the folding mechanism are connected to each other in such a way that, when a force is exerted on the folding mechanism by the coulter pressure cylinder, the folding mechanism acts as a single integral body, so that when a force is exerted on the coulter pressure lever by the coulter pressure cylinder, the coulter pressure lever, the folding lever and the folding cylinder perform a common rotational movement, in particular a rotational movement about the coulter carrier.

[0022] Preferably, the folding cylinder is essentially fully retracted ("on block") in a working state of the seed drill in which the seed coulters are in contact with the soil of an agricultural area, so that the

[0023] The P24-047 folding cylinder firmly couples the first end of the folding lever and the first end of the coulter pressure lever, preventing unintended changes in coulter pressure due to leakage from the folding cylinder. In a transport state of the seed drill, where the seed coulters are not in contact with the ground and the coulter rows are pivoted to reduce the seed drill's transport dimensions, the folding cylinder is preferably extended, particularly fully, to fold the coulter row. The folding cylinder is preferably connected to the coulter pressure lever and the folding lever such that a connecting rod of the folding cylinder is attached to the coulter pressure lever and a piston of the folding cylinder is attached to the folding lever. Alternatively, the folding cylinder can be connected to the coulter pressure lever and the folding lever such that the connecting rod of the folding cylinder is attached to the folding lever and the piston of the folding cylinder is attached to the coulter pressure lever.This inverted arrangement of the folding cylinder preferably allows the space requirement of the folding cylinder to be reduced by a more space-saving orientation of the folding cylinder and a reduction in the necessary length of the folding cylinder.

[0024] A further preferred feature is an agricultural seed drill according to the invention in which the folding lever can be pivoted relative to the coulter pressure lever by extending and / or retracting the folding cylinder, wherein the coulter carrier of the coulter row can be set into rotation by pivoting the folding lever to effect the folding movements. Preferably, the position and / or orientation of the coulter pressure lever remains essentially the same when extending or retracting the folding cylinder to pivot the folding lever.

[0025] It is also advantageous in an agricultural seed drill according to the invention in which the coulter pressure lever connects a coulter pressure cylinder of the coulter pressure adjusting device with the folding mechanism of the folding device, wherein the coulter pressure lever is preferably attached at its first end to the coulter pressure cylinder and to the folding cylinder and / or at its second end to the coulter carrier, in particular rotatably mounted on the coulter carrier, such that the folding mechanism can be adjusted by means of a lever arm and / or

[0026] P24-047 The extension of the coulter pressure cylinder is pivotable, so that the coulter carrier of the coulter row can be set into rotation by pivoting the folding mechanism to bring about the folding movement. Preferably, the folding mechanism is connected via the coulter pressure cylinder to a boom support of a seed drill boom. The first and second ends of the coulter pressure lever are preferably arranged opposite each other along the longitudinal extension of the coulter pressure lever. Preferably, each coulter row of the row arrangement comprises at least one, and in particular several, coulter pressure cylinders.

[0027] If a coulter row comprises several coulter carriers, at least one separate coulter pressure cylinder is arranged on each coulter carrier. If the folding mechanism of the seed drill comprises several folding mechanisms, a separate coulter pressure cylinder is preferably arranged on each folding mechanism. The coulter pressure cylinder can be a double-acting cylinder, preferably designed as a hydraulic cylinder. Alternatively, the coulter pressure cylinder can be designed as a pneumatic or electric cylinder. The coulter pressure cylinder preferably comprises a piston and a piston rod that can be extended from and retracted into the piston. The coulter pressure cylinder is preferably controllable, particularly by means of an electronic and / or hydraulic control device and / or via a hydraulic system of the seed drill. The coulter carrier is preferably rotatable by extending and / or retracting the coulter pressure cylinder.

[0028] In a further preferred embodiment of the agricultural seed drill according to the invention, the agricultural seed drill comprises a control device, in particular an electronic one, which is configured to control the folding device for folding in and / or unfolding the coulter row, in particular by actuating the folding cylinder of the at least one folding mechanism for extending and / or retracting the folding cylinder, wherein the control device is preferably configured to additionally control the coulter pressure adjustment device for folding in and / or unfolding the coulter row, in particular by actuating the

[0029] P24-047 Coulter pressure cylinder for extending and / or retracting the coulter pressure cylinder. If the seed drill comprises several coulter carriers and consequently several folding mechanisms, each with a separate folding cylinder, as well as several coulter pressure cylinders, the control device is preferably configured to control the several folding cylinders and / or the several coulter pressure cylinders jointly and / or independently of one another. In particular, the control device is configured to control one or more hydraulic systems of the seed drill, via which the one or more folding cylinders and / or coulter pressure cylinders are pressurized with hydraulic pressure. Preferably, the control device is configured to control the folding cylinders and / or the coulter pressure cylinders independently of one another and / or jointly. The control device can alternatively or additionally be designed as a hydraulic and / or pneumatic control device.

[0030] In another preferred embodiment of the agricultural seed drill according to the invention, the control device is configured to control the folding mechanism and / or the coulter pressure adjustment device, in particular by controlling a hydraulic system of the seed drill, such that the folding cylinder and / or the coulter pressure cylinder can be extended and / or retracted separately from each other and / or sequentially and / or at least temporarily simultaneously. Preferably, the control device is configured to extend and / or retract the folding cylinder and / or the coulter pressure cylinder in combination.By combining the extension and / or retraction of the coulter pressure cylinder and the folding cylinder, it is possible to fold the coulter row, in particular the respective coulter carrier of the coulter row with the seed coulters arranged on it, in a shorter time and / or to increase the folding angle and consequently the swivel range of the coulter row in order to reduce the space requirement of the row arrangement.

[0031] The control device is preferably designed to control, in particular by appropriately controlling the hydraulic system of the seed drill, one or more coulter pressure cylinders, which are assigned to the respective coulter row to be folded in and / or unfolded, independently of a

[0032] P24-047 or several coulter pressure cylinders of non-folding or non-folding coulter rows of the seed drill. In particular, the control device is designed to control the hydraulic system of the seed drill, especially by controlling one or more valves of the hydraulic system, to actuate the coulter pressure cylinders in such a way that the coulter pressure cylinders can be extended and / or retracted independently of each other, so that in particular the coulter pressure cylinders of the rearmost coulter row can be extended and the coulter pressure cylinders of the remaining coulter rows can be retracted simultaneously.

[0033] Furthermore, an agricultural seed drill according to the invention is advantageous in which the control device is configured to control at least one frame pivoting device for pivoting a pivoting frame relative to a base frame of the seed drill, in particular for pivoting the pivoting frame about a horizontal pivot axis extending transversely to the direction of travel of the seed drill, and / or at least one boom pivoting device for pivoting lateral booms relative to the pivoting frame of the seed drill, for pivoting the booms about a vertical pivot axis extending perpendicular to the direction of travel of the seed drill, for transferring the seed drill between a working state and a transport state, wherein the control device is in particular configured toto control the frame pivoting device and / or the boom pivoting device and / or the coulter pressure adjustment device and / or the folding device for transferring the seed drill between a working state and a transport state independently of each other, in particular by appropriately controlling the hydraulic system of the seed drill, and / or wherein the control device is in particular configured to carry out the pivoting of the pivoting frame by means of the frame pivoting device and / or the pivoting of the booms by means of the boom pivoting device and / or the folding in and / or unfolding of the coulter row by means of the folding device and / or by means of the coulter pressure adjustment device in any intended sequence and / or at least temporarily together.

[0034] P24-047 In particular, the transition of the seed drill from the working state to the transport state is achieved by first pivoting the swivel frame upwards by substantially 90 degrees relative to the base frame about a horizontal transverse axis. Subsequently, preferably, the two arms of the seed drill are each pivoted forwards in the direction of travel by 90 degrees relative to the swivel frame about a vertical axis. The folding of the coulter row preferably occurs at least temporarily simultaneously with the pivoting of the swivel frame and / or with the pivoting of the arms, so that the overall transition to the transport state is significantly shortened.Preferably, the seed drill comprises two booms, each pivotally arranged opposite the other on the left and right sides of the seed drill's pivoting frame, into a transport position and / or a working position. The booms, in particular, comprise at least two boom supports oriented transversely to the seed drill's direction of travel, each supporting several coulter carriers, each with several seed coulters, which together form the row arrangement. The pivoting frame is preferably pivotally arranged on a base frame of the seed drill, allowing it to pivot into a transport position and a working position, so that the pivoting frame can pivot together with the booms mounted on the pivoting frame. Preferably, the seed drill comprises several, in particular two, boom pivoting devices and / or frame pivoting devices, each of which is preferably designed as a hydraulic cylinder.

[0035] The problem underlying the invention is further solved by a method for operating the type mentioned at the outset, wherein at least one row of shares is folded in by means of a folding device designed separately from the share pressure adjustment device and comprising at least one actively driven folding mechanism, so that the space requirement of the row arrangement in a transport state of the seed drill is reduced.

[0036] In particular, within the framework of the inventive method, an agricultural seed drill is operated according to one of the embodiments described above. Regarding the advantages and

[0037] P24-047 Modifications of the inventive method for operation are therefore referred to as the advantages and modifications of the inventive agricultural seed drill.

[0038] In a preferred embodiment of the method according to the invention, the coulter row is folded in and / or unfolded by actuating a folding cylinder of the at least one folding mechanism of the folding device to extend and / or retract the folding cylinder. Alternatively or additionally, the coulter row is folded in and / or unfolded by actuating a coulter pressure cylinder of the coulter pressure adjustment device to extend or retract the coulter pressure cylinder. Alternatively or additionally, the folding device and / or the coulter pressure adjustment device are controlled separately and / or sequentially and / or at least temporarily simultaneously by means of a control device, in particular an electronic control device, in particular by controlling a hydraulic system of the seed drill, to extend and / or retract the folding cylinder and / or the coulter pressure cylinder.Preferably, the folding device, the coulter pressure adjustment device and / or the hydraulic system for folding in and / or unfolding the coulter row are controlled by the control device of the seed drill.

[0039] Furthermore, a method according to the invention is advantageous in which a pivoting frame is pivoted relative to a base frame of the seed drill by means of at least one frame pivoting device of the seed drill, in particular for pivoting the pivoting frame about a horizontal pivot axis extending transversely to the direction of travel of the seed drill. Alternatively or additionally, lateral booms are pivoted relative to the pivoting frame of the seed drill by means of at least one boom pivoting device of the seed drill for pivoting the booms about a vertical pivot axis extending perpendicular to the direction of travel of the seed drill. Alternatively or additionally, the frame pivoting device and / or the boom pivoting device and / or the coulter pressure adjustment device and / or the folding device for transferring the seed drill between a

[0040] P24-047 The operating state and a transport state are each controlled independently of each other, in particular by appropriate control of the hydraulic system of the seed drill, by means of the control device. Alternatively or additionally, within the framework of the method according to the invention, the pivoting frame is pivoted by means of the frame pivoting device and / or the booms are pivoted by means of the boom pivoting device and / or the coulter row is folded in and / or unfolded by means of the folding device and / or by means of the coulter pressure adjusting device in any intended sequence and / or at least temporarily together, in particular by appropriate control by means of the control device.

[0041] Preferred embodiments of the invention are explained and described in more detail below with reference to the accompanying drawings. These show:

[0042] Fig. 1 shows a seed drill according to the invention in a perspective view.

[0043] Opinion;

[0044] Fig. 2 is a perspective close-up view of a row arrangement of a seed drill according to the invention comprising several rows of shares in an unfolded state of the third row of shares;

[0045] Fig. 3 shows a folding mechanism for folding in and out a row of shares of a seed drill according to the invention in an unfolded state in a detailed side view;

[0046] Fig. 4 shows the row arrangement from Fig. 2 in a folded-in state of the third row in a perspective close-up view;

[0047] Fig. 5 shows the folding mechanism from Fig. 3 in a folded state in a detailed side view;

[0048] Fig. 6 shows an alternative embodiment of a folding mechanism for folding in and out a row of shares according to the invention.

[0049] P24-047 Seed drill in an unfolded state in a detailed side view;

[0050] Fig. 7 shows the folding mechanism from Fig. 6 in a folded state in a detailed side view;

[0051] Fig. 8 shows a seed drill according to the invention in a working state in a rear view;

[0052] Fig. 9 shows the seed drill from Fig. 8 in a side view;

[0053] Fig. 10 shows a seed drill according to the invention in a headland position in a rear view;

[0054] Fig. 11 shows the seed drill from Fig. 10 in a side view;

[0055] Fig. 12 shows a seed drill according to the invention with the row arrangement pivoted upwards about a transverse axis in a rear view;

[0056] Fig. 13 shows the seed drill from Fig. 12 in a side view;

[0057] Fig. 14 shows a seed drill according to the invention in a transport state with the third row of coulters folded in, in a rear view; and

[0058] Fig. 15 shows the seed drill from Fig. 14 in a side view.

[0059] Fig. 1 shows an agricultural seed drill 10 according to the invention, which is designed as an agricultural seed drill 10 pulled by a towing vehicle 50. The agricultural seed drill 10 comprises three rows of coulters 14a to 14c arranged one behind the other and spaced apart in the direction of travel F of the seed drill 10, which together form a row arrangement 12 of the seed drill 10. In order for the illustrated agricultural seed drill 10 to comply with the maximum transport dimensions permissible for road transport on public roads, in particular a maximum permissible road transport height, it is necessary to convert the agricultural seed drill 10 from the working state of the seed drill 10 shown in Fig. 1 to a transport state of the seed drill 10.

[0060] P24-047 wherein the space requirement of the row arrangement 12 in the transport state of the seed drill 10 is reduced in such a way that the permissible road transport dimensions are met.

[0061] To transfer the seed drill 10 from its working state to its transport state, the agricultural seed drill 10 comprises a control device 40, which is designed, for example, as an electronic or hydraulic control device 40 and can be arranged on the seed drill 10. The seed drill 10 can be controlled by means of the control device 40 to transfer it to its working state and / or its transport state. In particular, during the transfer to the transport state of the seed drill 10, the rearmost row of coulters 14c in the direction of travel F of the seed drill 10 is folded in such a way that the permissible road transport height of the seed drill 10 is maintained in its transport state, the control device 40 being configured to control, in particular, the folding in of the row of coulters 14c.

[0062] Fig. 2 shows a section of the row arrangement 12 of a seed drill 10 according to the invention, showing in detail a section of the coulter rows 14a to 14c of the row arrangement 12 of the seed drill 10 on the left side in the direction of travel F of the seed drill 10. The coulter rows 14a to 14c each comprise several seed coulters 16 arranged side by side and spaced apart from each other transversely to the direction of travel F of the seed drill 10, which in the illustrated embodiment are designed as tine coulters, each with a press and / or depth control roller. The seed coulters 16 of the coulter rows 14a to 14c are attached to coulter carriers 20a to 20f, which are designed as transverse beams, by means of a single-arm swing arm. Since Fig. 2 only shows a section of the row arrangement 12 on the left side in the direction of travel F of the seed drill 10, only the share carriers 20a of share row 14a, 20b of share row 14b and 20c of share row 14c arranged on the left side are shown in Fig. 2.The share carriers 20a to 20c of the share rows 14a to 14c shown in Fig. 2 are also attached to boom carriers 38a, 38b of the seed drill 10.

[0063] P24-047 On the rearmost row 14c of the row arrangement 12 of the seed drill 10, in the direction of travel F of the seed drill 10, a folding mechanism 18 with a folding cylinder 22 and a lever mechanism 24, as well as a coulter pressure cylinder 34, are arranged. The coulter pressure cylinder 34 connects the lever mechanism 24 of the folding mechanism 18 to the boom support 38b of the seed drill 10. The lever mechanism 24, in turn, connects the coulter pressure cylinder 34 and the folding cylinder 22 to the coulter support 20c of the rearmost row 14c.The ground pressure of the seed shares 16 of the share row 14c can be adjusted by means of the coulter pressure cylinder 34 by extending and / or retracting the coulter pressure cylinder 34, since the extension and / or retraction of the coulter pressure cylinder 34 causes a torque transmitted by the lever mechanism 24 to the share carrier 20c to rotate the share carrier 20c about its longitudinal axis, so that the seed shares 16 arranged on the share carrier 20c are pivoted relative to the ground of an agricultural area in order to adjust the orientation and consequently the ground pressure of the seed shares 16 of the share row 14c on the ground of the agricultural area.

[0064] The seed drill 10 preferably comprises several coulter pressure cylinders 34, in particular at least one coulter pressure cylinder 34 per coulter row 14a to 14c, in particular a separate coulter pressure cylinder 34 for each coulter carrier 20a to 20f of the coulter rows 14a to 14c, wherein all coulter pressure cylinders 34 of the seed drill 10 are jointly part of a coulter pressure adjustment device of the seed drill 10, which can be controlled by means of the control device 40 to adjust the coulter pressure of the seed drill 10.Furthermore, the rearmost coulter row 14c of the seed drill 10 in the direction of travel F of the seed drill 10 can be folded into a transport position via the folding mechanism 18 arranged on the coulter carrier 20c, in particular in combination with an extension and / or retraction of the coulter pressure cylinder 34, such that the permissible road transport height of the seed drill 10 is maintained despite the presence of three coulter rows 14a to 14c arranged one behind the other in a transport state of the seed drill 10.

[0065] By extending and / or retracting the folding cylinder 22 of the folding mechanism 18, the lever mechanism 24 is actuated such that the share carrier 20c of the

[0066] P24-047 The share row 14c with the seed coulters 16 arranged on it is set into rotation, so that the seed coulters 16 arranged on the share carrier 20c perform a folding movement about a transverse axis running perpendicular to the direction of travel F of the seed drill 10, whereby the share row 14c can be folded down to reduce the space requirement of the row arrangement 12.If the seed drill 10 comprises coulter rows 14a to 14c, each with several coulter carriers 20a to 20f, the seed drill 10 preferably includes a separate folding mechanism 18 with a separate folding cylinder 22 on each coulter carrier 20a, 20d of the rearmost coulter row 14c in the direction of travel F of the seed drill 10, wherein the several folding mechanisms 18 with the respective folding cylinders 22 together form a folding device of the seed drill 10 for folding in and / or out the coulter row 14c, wherein the folding device with the several folding mechanisms 18 for folding in and / or out the coulter row 14c of the seed drill 10 can be controlled by means of the control device 40, in particular independently of one another. In the Fig.Figure 2 shows a working position of the share rows 14a to 14c, in which the share row 14c with the folding mechanism 18 and the share pressure cylinder 34 is shown in an unfolded state, for example during a work process for spreading seed on an agricultural area.

[0067] Fig. 3 shows a detailed view of the folding mechanism 18 and the coulter pressure cylinder 34 of the seed drill 10, in particular of the folding mechanism 18 and the coulter pressure cylinder 34 as depicted in Fig. 2. Fig. 3 shows the folding mechanism 18 and the coulter pressure cylinder 34 in a working position in which a coulter row 14c of the seed drill 10, on which the folding mechanism 18 may be arranged, is unfolded in a working state of the seed drill 10. The coulter pressure cylinder 34 connects the lever mechanism 24 of the folding mechanism 18 and the folding cylinder 22 arranged on the lever mechanism 24 to the boom support 38b of the seed drill 10. Consequently, the folding mechanism 18 is adjustable relative to the boom support 38b by extending and / or retracting the coulter pressure cylinder 34. The lever mechanism 24 of the folding mechanism 18 comprises a folding lever 26 and a stock pressure lever 30, wherein the folding lever 26 is connected at its upper first end 28a to the piston of the

[0068] P24-047 The folding cylinder 22 and at its lower second end 28b are fixed, in particular torsionally rigid, to the share carrier 20c of the share row 14c. The share pressure lever 30 of the lever mechanism 24 is attached at its upper first end 32a to both the piston rod of the share pressure cylinder 34 and to the piston rod of the folding cylinder 22, and at its lower second end 32b, in particular rotatably mounted, to the share carrier 20c of the share row 14c.

[0069] In the working state shown in Fig. 3, in which the coulter pressure cylinder 34, the folding cylinder 22 and the lever mechanism 24 are each arranged in a working position, the coulter pressure lever 30 and the folding lever 26 are rigidly coupled to each other by means of the fully retracted folding cylinder 22 in such a way that the lever mechanism 24 acts as a common integral lever body, so that the coulter carrier 20c, which is torsionally rigidly connected to the folding lever 26, can be set in rotation by extending and / or retracting the coulter pressure cylinder 24 to adjust the ground pressure of the seed coulters 16 attached to the coulter carrier 20c.In this working position, the hinged cylinder 22 is fully retracted (“moved to the block”), so that the ground pressure of the seed coulters 16 can be adjusted by extending and / or retracting the coulter pressure cylinder 34, without unintentional changes to the ground pressure, for example by unintentional adjustment using the hinged cylinder 22, or by leakage from the hinged cylinder 22.

[0070] Fig. 4 shows a section of a row arrangement 12 with a left-hand section of coulter rows 14a to 14c of a seed drill 10 according to the invention, wherein coulter row 14c is shown in a folded-in state. Compared to the working state of the seed drill 10 shown in Fig. 2, the rearmost coulter row 14c in the transport position of the coulter row 14c shown in Fig. 4 is pivoted by means of the folding mechanism 18 and the coulter pressure cylinder 34 such that the seed coulters 16 arranged on the coulter carrier 20c of the coulter row 14c are folded in front of the coulter row 14a of the seed drill 10 in the direction of travel F.

[0071] P24-047 folded arrangement of the share row 14c makes it possible to comply with the permissible road transport dimensions of the seed drill 10 in a transport state of the seed drill 10.

[0072] Folding the coulter row 14c in front of the coulter row 14a is made possible by a combined pivoting of the coulter row 14c using both the coulter pressure cylinder 34 and the folding cylinder 22 of the folding mechanism 18. By using both the coulter pressure cylinder 34 and the folding cylinder 22 of the folding mechanism 18 together to fold the coulter row 14c, the pivoting range of the coulter row 14c is increased to such an extent that the space required for the row arrangement 12 in a transport state of the seed drill 10 is minimized by folding the coulter row 14c.The large swivel range of the share row 14c, achieved through combined swiveling by means of the share pressure cylinder 34 and the folding cylinder 22, results from the fact that both the extension of the share pressure cylinder 34 and the extension of the folding cylinder 22 each cause a swiveling of the share row 14c by rotation of the share carrier 20c, so that the rotation angle of the share carrier 20c is increased when the share row 14c is folded in by the combined extension by means of the share pressure cylinder 34 and the folding cylinder 22.

[0073] Fig. 5 shows the arrangement depicted in Fig. 3 with the folding mechanism 18 and the coulter pressure cylinder 34 in a folded state of the coulter row 14c of the seed drill 10, as shown, for example, in Fig. 4. In the folded state of the coulter row 14c, both the coulter pressure cylinder 34 and the folding cylinder 22 of the folding mechanism 18 are extended. Because the folding lever 26 of the lever mechanism 24 is rigidly attached to the coulter carrier 20c and connected to the coulter pressure lever 30 via the piston rod of the folding cylinder 22, the extension of the coulter pressure cylinder 34 causes the coulter carrier 20 to rotate about its longitudinal axis, which runs transversely to the direction of travel F of the seed drill 10. Thus, the extension of the coulter pressure cylinder 34 already achieves a pivoting motion to fold the coulter row 14c. Because the folding cylinder 22 is rigidly attached to the coulter carrier 20c, the coulter pressure cylinder 34 is also rigidly attached to the coulter carrier 20c.

[0074] Since the folding lever 26 is attached to the coulter carrier 20c and to the coulter pressure lever 30 connected to the coulter pressure cylinder 34, extending the folding cylinder 22 causes the folding lever 26 to pivot relative to the coulter pressure lever 30. This pivoting movement of the folding lever 26 also causes the coulter carrier 20c, which is fixed to the folding lever 26, to rotate about its longitudinal axis, which runs transversely to the direction of travel F of the seed drill 10. Thus, the coulter carrier 20c is rotated by an angle of rotation by both the extension of the coulter pressure cylinder 34 and the extension of the folding cylinder 22, as described by the arrangement, in particular the lever mechanism 24. This rotation causes the seed coulters 16 arranged on the coulter carrier 20c to fold in, as shown in Fig. 4.

[0075] Figures 6 and 7 show an alternative embodiment of the folding mechanism 18, wherein the folding mechanism 18 and the coulter pressure cylinder 34 arranged thereon are shown in an unfolded state in Figure 6 and in a folded-in state of the coulter row 14c of the seed drill 10 in Figure 7. In contrast to the embodiment of the folding mechanism 18 shown in Figures 3 and 5, in the embodiment of the folding mechanism 18 in Figures 6 and 7, the arrangement of the folding cylinder 22 of the folding mechanism 18 is modified such that the space requirement of the folding mechanism 18 is further reduced by a more favorable orientation and a smaller design of the folding cylinder 22, without any restrictions on folding the coulter row 14c, compared to the embodiment of the folding mechanism 18 described above.

[0076] In the embodiment of the folding mechanism 18 shown in Figures 6 and 7, the piston of the folding cylinder 22 is connected to the upper first end 32a of the share pressure lever 30, and the piston rod of the folding cylinder 22 is connected to the upper first end 28a of the folding lever 26. Consequently, the folding cylinder 22 is arranged "in reverse" on the lever mechanism 24, unlike the embodiment of the folding mechanism 18 shown in Figures 3 and 5. By extending the share pressure cylinder 34 with the folding cylinder 22 retracted, the entire folding mechanism 18 is pivoted, so that

[0077] P24-047 the share carrier 20c is set into rotation. Due to the arrangement of the folding mechanism 18, in particular the arrangement of the lever mechanism 24, which acts as a single integral body via the fully retracted folding cylinder 22, the force of the share pressure cylinder 34 is transmitted to the share carrier 20c via the folding mechanism 18. When the folding cylinder 22 is extended, especially when the share pressure cylinder 34 is fully extended, the folding lever 26 is pivoted relative to the share pressure lever 30, thereby setting the share carrier 20c, which is fixedly attached to the folding lever 26, into rotation. Consequently, both the extension and retraction of the share pressure cylinder 34 and the extension and retraction of the folding cylinder 22 result in a rotation of the share carrier 20c, which pivots the seed coulters 16 arranged on the share carrier 20c to fold the coulter row 14c in and out.

[0078] Figures 8 to 15 show an agricultural seed drill 10 according to the invention in different states and in each case in a side view and a rear view, in particular to illustrate the transfer of an agricultural seed drill 10 from a working state, for example during a sowing process on an agricultural area N, to a transport state of the seed drill 10, in which the seed drill 10 complies with the permissible road transport dimensions for road transport on public roads, as well as the intermediate steps necessary to transfer the seed drill 10 between the working state and the transport state.

[0079] Figure 8 shows an agricultural seed drill 10 according to the invention in a working state, for example during a sowing process for distributing seed on agricultural land, in a rear view. Figure 9 shows the agricultural seed drill 10 from Figure 8 in a side view. Viewed from the rear, the illustrated embodiment of the agricultural seed drill 10 comprises a boom 36a arranged on the left and a boom 36b arranged on the right. The booms 36a and 36b of the seed drill 10 are pivotably mounted on a pivot frame 44 of the seed drill 10. Furthermore, the

[0080] P24-047 Seed drill 10 two boom pivoting devices 48, each designed as a hydraulic cylinder and configured to pivot the booms 36a, 36b of the seed drill 10, which are pivotably arranged on the pivoting frame 44, by extending and / or retracting the boom pivoting devices 48 designed as hydraulic cylinders relative to the pivoting frame 44 about a pivot axis extending in the direction of travel F of the seed drill 10 by essentially 90 degrees between the working position of the booms 36a, 36b shown in Figs. 8 and 9 and a transport position of the booms 36a, 36b pivoted upwards by 90 degrees.

[0081] The seed drill 10 comprises a separate folding mechanism 18 on each of its two arms 36a, 36b for folding in and / or out the furthest row of coulters 14c of the seed drill 10 in the direction of travel F. Furthermore, the pivoting frame 44 with the arms 36a, 36b arranged thereon is pivotably arranged on a base frame 46 of the seed drill 10, the seed drill 10 comprising a frame pivoting device 42, which is designed as a hydraulic cylinder, by means of which the pivoting frame 44 with the arms 36a, 36b arranged thereon can be pivoted relative to the base frame 46 of the seed drill 10 by substantially 90 degrees about a pivot axis extending transversely to the direction of travel F of the seed drill 10.

[0082] Figures 10 and 11 show the agricultural seed drill 10 already depicted in Figures 8 and 9, in which the pivoting frame 44 with the arms 36a, 36b and the row arrangement 12 attached to it is pivoted upwards by approximately 30 degrees by means of the frame pivoting device 42 into a headland position relative to the base frame 46 of the seed drill about a pivot axis extending transversely to the direction of travel F of the seed drill 10. In the illustrated headland position with the pivoting frame pivoted upwards by approximately 30 degrees, the row arrangement 12 with the coulter rows 14a to 14c and the seed coulters 16 attached to it, which are mounted on the arms 36a, 36b of the seed drill 10, is pivoted upwards in such a way that soil contact of the seed coulters 16 is interrupted during a sowing operation on an agricultural area, so that

[0083] P24-047 the seed drill 10 can perform a turning maneuver, for example at the headland of a field. The seed drill 10 in the headland position is shown in Fig. 10 in a rear view and in Fig. 11 in a side view.

[0084] Figures 12 and 13 show the embodiment of an agricultural seed drill 10 according to the invention, as depicted in Figures 8 to 11, with the pivot frame 44, with the outriggers 36a, 36b arranged thereon, pivoted upwards by essentially 90 degrees about a pivot axis extending transversely to the direction of travel F of the seed drill 10. The seed drill 10 with the pivot frame 44 pivoted upwards is shown in a rear view in Figure 12 and in a side view in Figure 13. In particular, Fig. 12 shows that the seed drill 10 comprises a boom 36a on the left side in the direction of travel F of the seed drill 10 and a boom 36b on the right side in the direction of travel F of the seed drill 10, wherein the boom 36a comprises two boom supports 38a, 38b which run transversely to the direction of travel F of the seed drill 10 and are spaced apart from each other perpendicular to the direction of travel F of the seed drill 10.Similarly, the boom 36b comprises two boom supports 38c and 38d, with boom support 38c being aligned with boom support 38a and boom support 38d being aligned with boom support 38b. Boom supports 38a to 38d are attached to the pivoting frame 44 of the seed drill 10, so that booms 36a and 36b pivot together when the pivoting frame 44 is pivoted. Boom supports 38a to 38d serve to attach coulter rows 14a to 14c to booms 36a and 36b. Coulter rows 14b and 14c are attached to boom supports 38a and 38c, and coulter row 14a is attached to boom supports 38b and 38d.

[0085] Furthermore, as can be seen in Fig. 12, the share rows 14a to 14c comprise several share carriers 20a to 20f, in particular two per boom 36a, 36b. Thus, share row 14a comprises a share carrier 20a arranged on boom 36a and a share carrier 20d arranged on boom 36b. Share row 14b comprises a share carrier 20b arranged on boom 36a and a share carrier 20d arranged on boom 36b.

[0086] P24-047 Share carrier 20e. The share row 14c comprises a share carrier 20c arranged on the boom 36a and a share carrier 20f arranged on the boom 36b. In order to be able to adjust the ground pressure of the seed coulters 16 of all share rows 14a to 14c, a share pressure cylinder 34 of the share pressure adjustment device of the seed drill 10 is assigned to each share carrier 20a to 20f of the share rows 14a to 14c. Likewise, a separate folding mechanism 18 is arranged on each of the share carriers 20c, 20f of the share row 14c, so that the share row 14c is made possible by folding in and / or out all seed shares 16 of the share row 14c by bringing about a rotational movement of the share carriers 20c, 20f via the folding mechanisms 18 and the share pressure cylinders 34 arranged on the share row 14c.

[0087] In particular, it is provided that the coulter pressure cylinders 34, which are assigned to the coulter row 14c, can be controlled independently of all other coulter pressure cylinders 34 of the coulter rows 14b and 14a, in particular by controlling valves of a hydraulic system of the seed drill 10 by means of the control device 40, so that the coulter pressure cylinders 34 of the coulter row 14c can be extended and / or retracted separately from the coulter pressure cylinders 34 of the coulter rows 14a, 14b, in particular so that the coulter pressure cylinders 34 of the coulter row 14c can be extended while the remaining coulter pressure cylinders 34 can be retracted at the same time.

[0088] Figures 12 and 13 show an intermediate step in transferring the seed drill 10 from the working state shown in Figures 8 and 9 to a transport state for road transport, with the pivoted swivel frame 44 and the arms 36a, 36b, which are also pivoted upwards, together with the row arrangement 12. Initially, only the swivel frame 44 is pivoted upwards by means of the frame pivoting device 42, so that the entire row arrangement 12 is pivoted upwards by essentially 90 degrees to the ground and perpendicular to the direction of travel F of the seed drill 10, with the coulter row 14c still shown in an extended position. This results in a height H1 of the uppermost coulter row 14c of the row arrangement 12 above the ground in Figures 12 and 13, where the height H1 exceeds permissible road transport dimensions, in particular the permissible road transport height, for road transport of the seed drill 10.

[0089] Figures 14 and 15 show the embodiment of the agricultural seed drill 10 according to the invention, as depicted in Figures 8 to 13, in a transport state in which the permissible road transport dimensions of the seed drill 10 for road transport on public roads are observed. Figure 14 shows the seed drill 10 in the transport state in a rear view, and Figure 15 shows a side view.

[0090] In the illustrated transport state of the seed drill 10, the pivoting frame 44 with the outriggers 36a, 36b arranged thereon, as well as the row arrangement 12 with the coulter rows 14a to 14c arranged on the outriggers 36a, 36b, are pivoted upwards by essentially 90 degrees about the pivot axis running transversely to the direction of travel F of the seed drill 10. In addition, the outriggers 36a, 36b are each pivoted forwards relative to the pivoting frame 44 by means of the outrigger pivoting devices 48 about a vertical pivot axis in the direction of travel F of the seed drill 10.

[0091] To comply with the road transport height of the seed drill 10, the coulter row 14c is additionally folded in, so that the seed drill 10 has a reduced height H2 in the transport state shown. In particular, the coulter row 14c is folded in, at least temporarily, simultaneously with the pivoting of the booms 36a, 36b by means of the boom pivoting devices 48 through rotation of the coulter carriers 20c, 20f, whereby, as already described above, both the coulter pressure cylinders 34 arranged on the coulter row 14c and the folding mechanisms 18 with the respective folding cylinders 22 are used to fold in the coulter row 14c.

[0092] Because the coulter row 14c is folded in by means of the respective coulter pressure cylinders 34 and the separate and actively driven folding mechanisms 18, it is possible, firstly, to fold the coulter row 14c in without manual intervention by a machine operator, for example, for manually locking and / or closing the coulter row 14c before bringing the seed drill 10 into transport and / or working mode. Secondly, the actively driven folding and unfolding of the coulter row 14c by means of the folding mechanisms 18 is gentler on the material and less prone to errors and damage, so that even inexperienced machine operators can safely perform the folding and / or unfolding of the coulter row 14c.

[0093] Furthermore, the actively driven folding and / or unfolding of the share row 14c by means of the folding mechanisms 18 makes it possible to perform fully automated folding or swiveling operations for moving the seed drill 10 between a transport state and a working state, thus enabling significant time savings and therefore efficiency gains, without the need for manual intervention by a machine operator.

[0094] Figure 15 shows in particular that the coulter row 14c is folded under the foremost coulter row 14a (in the working state of the seed drill 10) by means of the folding mechanisms 18 and the coulter pressure cylinders 34 associated with the coulter row 14c. This is made possible by the fact that the folding of the coulter row 14c, both by means of the coulter pressure cylinders 34 and the folding mechanisms 18, allows for a particularly large pivoting range of the coulter row 14c. The resulting road transport dimensions, especially the reduced height H2, thus ensure the smallest possible space requirement for the row arrangement 12 of the seed drill 10 for road transport purposes.

[0095] P24-047 Reference mark

[0096] 10 Seed drill

[0097] 12 row arrangement

[0098] 14a-14c rows

[0099] 16 seeders

[0100] 18 Folding mechanism

[0101] 20a-20f shovel carrier

[0102] 22 folding cylinders

[0103] 24 lever mechanism

[0104] 26 folding levers

[0105] 28a, 28b Ends

[0106] 30 share pressure levers

[0107] 32a, 32b ends

[0108] 34 coulter pressure cylinders

[0109] 36a, 36b cantilever

[0110] 38a-38d Cantilever beam

[0111] 40 Control unit

[0112] 42 Frame swivel device

[0113] 44 swivel frames

[0114] 46 basic frames

[0115] 48 Boom swivel device

[0116] 50 towing vehicle

[0117] F Direction of travel

[0118] H1, H2 height

[0119] P24-047

Claims

Patent claims 1. Agricultural seed drill (10) for sowing seed on an agricultural area, comprising a row arrangement (12) which includes several rows of coulters (14a-14c) extending transversely to the direction of travel (F) of the seed drill (10) and spaced apart from one another in the direction of travel (F) of the seed drill (10), each row of coulters having several seed coulters (16) arranged side by side and spaced apart from one another on the respective row of coulters (14a-14c) transversely to the direction of travel (F) of the seed drill (10), and a coulter pressure adjustment device for adjusting the coulter pressure of the seed coulters (16) of the rows of coulters (14a-14c), characterized by a folding device formed separately from the coulter pressure adjustment device and comprising at least one actively driven folding mechanism (18), which is configured to fold in at least one row of coulters (14a-14c) so that the space requirement of the row arrangement (12) is reduced in a transport state of the seed drill (10). is.

2. Agricultural seed drill (10) according to claim 1, characterized in that the at least one folding mechanism (18) of the folding device is configured to bring about a folding movement of the coulter row (14c), in particular by rotating a coulter carrier (20c, 20f) of the coulter row (14c) carrying several seed coulters (16), wherein the coulter row (14c) preferably has several coulters arranged transversely to the direction of travel. (F) of the seed drill (10) comprises share carriers (20c, 20f) arranged side by side and each carrying several seed coulters (16), and / or the folding device comprises several folding mechanisms (18), which are preferably each assigned to a share carrier (20c, 20f) of the share row (14c) comprising several share carriers (20c, 20f) for rotating the respective share carrier (20c, 20f). P24-047 3. Agricultural seed drill (10) according to claim 1 or 2, characterized in that the at least one folding mechanism (18) comprises a folding cylinder (22) for actuating the folding mechanism (18), in particular for bringing about the folding movement of the share row (14c), wherein the folding cylinder (22) is preferably configured to rotate the share carrier (20c, 20f) of the share row (14c) by actuating the folding mechanism (18) to fold in the share row (14c).

4. Agricultural seed drill (10) according to one of the preceding claims, characterized in that the at least one folding mechanism (18) comprises a lever mechanism (24) by means of which the folding mechanism (18) for folding in the share row (14c) is connected to the share row (14c), in particular to the share carrier (20c, 20f) of the share row (14c), wherein the lever mechanism (24) is in particular configured to transmit a torque from the folding mechanism (18) to the share row (14c) in order to effect the folding movement for folding in the share row (14c), in particular for rotating the share carrier (20c, 20f) of the share row (14c).

5. Agricultural seed drill (10) according to claim 4, characterized in that the lever mechanism (24) of the folding mechanism (18) comprises a folding lever (26) for transmitting the torque generated, in particular by the folding cylinder (22), from the folding mechanism (18) to the coulter carrier (20c, 20f), wherein the folding lever (26) is preferably attached at its first end (28a) to the folding cylinder (22) and / or at its second end (28b), in particular in a torsionally rigid manner, to the coulter carrier (20c, 20f) of the coulter row (14c), and / or comprises a coulter pressure lever (30) which is configured to exert a torque acting on the coulter pressure lever (30), in particular by the P24-047 The shear pressure adjustment device generated force to transfer to the folding mechanism (18), in particular to the folding cylinder (22) and / or the folding lever (26).

6. Agricultural seed drill (10) according to claim 5, characterized in that the folding lever (26) can be pivoted relative to the coulter pressure lever (30) by extending and / or retracting the folding cylinder (22), wherein the coulter carrier (20c, 20f) of the coulter row (14c) can be set into rotation by pivoting the folding lever (26) to bring about the folding movement.

7. Agricultural seed drill (10) according to claim 5 or 6, characterized in that the coulter pressure lever (30) connects a coulter pressure cylinder (34) of the coulter pressure adjustment device with the folding mechanism (18) of the folding device, wherein the coulter pressure lever (30) is preferably attached at its first end (32a) to the coulter pressure cylinder (34) and to the folding cylinder (22) and / or at its second end (32b) to the coulter carrier (20c, 20f), in particular rotatably mounted on the coulter carrier (20c, 20f), such that the folding mechanism (18) can be pivoted by extending and / or retracting the coulter pressure cylinder (34), so that the coulter carrier (20c, 20f) of the coulter row (14c) can be set into rotation by pivoting the folding mechanism (18) to bring about the folding movement.

8. Agricultural seed drill (10) according to one of the preceding claims, characterized by a control device (40), in particular an electronic one, which is configured to control the folding device for folding in and / or unfolding the coulter row (14c), in particular by actuating the folding cylinder (22) of the at least one folding mechanism (18) for extending and / or retracting the folding cylinder (22), wherein the control device (40) is preferably configured to additionally actuate the folding mechanism (18) for folding in and / or unfolding the coulter row (14c). P24-047 to control the coulter pressure adjustment device, in particular by actuating the coulter pressure cylinder (34) to extend and / or retract the coulter pressure cylinder (34).

9. Agricultural seed drill (10) according to claim 8, characterized in that the control device (40) is configured to control the folding device and / or the coulter pressure adjustment device in such a way, in particular by controlling a hydraulic system of the seed drill (10), that the folding cylinder (22) and / or the coulter pressure cylinder (34) can each be extended separately from one another and / or successively and / or at least temporarily simultaneously.

10. Agricultural seed drill (10) according to claim 8 or 9, characterized in that the control device (40) is configured to control at least one frame pivoting device (42) for pivoting a pivoting frame (44) relative to a base frame (46) of the seed drill (10), in particular for pivoting the pivoting frame (44) about a pivot axis extending horizontally and transversely to the direction of travel (F) of the seed drill (10), and / or at least one boom pivoting device (48) for pivoting lateral booms (36a, 36b) relative to the pivoting frame (44) of the seed drill (10), for pivoting the booms (36a, 36b) about a pivot axis extending vertically and perpendicularly to the direction of travel (F) of the seed drill (10), for transferring the seed drill (10) between a working state and a transport state, wherein the control device (40) is in particular configured toto control the frame pivoting device (42) and / or the boom pivoting device (48) and / or the coulter pressure adjustment device and / or the folding device for transferring the seed drill (10) between a working state and a transport state independently of each other, in particular by appropriately controlling the hydraulic system of the seed drill (10), and / or, P24-047 the pivoting of the pivoting frame (44) by means of the frame pivoting device (42) and / or the pivoting of the booms (36a, 26b) by means of the boom pivoting device (48) and / or the folding in and / or unfolding of the share row (14c) by means of the folding device and / or by means of the share pressure adjustment device in any intended sequence and / or each at least temporarily together.

11. Method for operating an agricultural seed drill (10), in particular an agricultural seed drill (10) according to one of the preceding claims, with a row arrangement (12) comprising several rows of coulters (14a-14c) extending transversely to the direction of travel (F) of the seed drill (10) and spaced apart from one another in the direction of travel (F) of the seed drill (10), each row of coulters having several seed coulters (16) arranged side by side and spaced apart from one another on the respective row of coulters (14a-14c) transversely to the direction of travel (F) of the seed drill (10), and a coulter pressure adjustment device for adjusting the coulter pressure of the seed coulters (16) of the rows of coulters (14a-14c), characterized in that at least one row of coulters (14a-14c) is folded in by means of a folding device formed separately from the coulter pressure adjustment device and comprising at least one actively driven folding mechanism (18),so that the space requirement of the row arrangement (12) is reduced in a transport state of the seed drill (10).

12. The method of claim 11, characterized by one, several or all of the following steps: Folding and / or unfolding the share row (14c) by Controlling a folding cylinder (22) of at least one P24-047 Folding mechanism (18) of the folding device for extending and / or retracting the folding cylinder (22), Folding in and / or unfolding the share row (14c) by actuating a share pressure cylinder (34) of the share pressure adjustment device to extend and / or retract the share pressure cylinder (34), Control of the folding device and / or the coulter pressure adjustment device by means of a control device (40), in particular electronic, in particular by controlling a hydraulic system of the seed drill (10), for retracting and / or extending the folding cylinder (22) and / or the coulter pressure cylinder (34) separately from each other and / or successively and / or at least temporarily simultaneously.

13. The method of claim 11 or 12, characterized by one, several or all of the following steps: Pivoting a pivoting frame (44) relative to a base frame (46) of the seed drill (10) by means of at least one frame pivoting device (42) of the seed drill (10), in particular for pivoting the pivoting frame (44) about a pivot axis horizontal and transverse to the direction of travel (F) of the seed drill (10), and / or Pivoting of lateral booms (36a, 36b) relative to the pivoting frame (44) of the seed drill (10) by means of at least one boom pivoting device (48) of the seed drill (10) to pivot the booms (36a, 36b) each about a pivot axis running vertically and perpendicular to the direction of travel (F) of the seed drill (10), and / or Control of the frame pivoting device (42) and / or the boom pivoting device (48) and / or the coulter pressure adjustment device and / or the folding device for transferring the seed drill (10) between a working state and a transport state, each independently P24-047 from each other, in particular by appropriately controlling the hydraulic system of the seed drill (10) by means of the control device (40), and / or pivoting the pivoting frame (44) by means of the frame pivoting device (42) and / or pivoting the Boom (36a, 36b) by means of the boom pivoting device (48) and / or folding in and / or unfolding of the share row (14c) by means of the folding device and / or by means of the share pressure adjustment device in any intended sequence and / or at least temporarily together, in particular by appropriate control by means of the control device (40). P24-047

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