Agricultural implement

Abstract

The present invention relates to an agricultural implement, in particular for soil cultivation, comprising an implement frame and at least one first tool frame which is arranged on the implement frame so as to be foldable about a first pivot axis, in particular laterally, and is connected to the implement frame by at least one first pivot bearing, wherein the first tool frame can be moved between a working position and a transport position by means of at least one first cylinder unit, wherein the first cylinder unit is mounted at a bearing point on the implement frame side and the tool frame side. According to the invention, the implement has at least one adjusting unit which is designed such that, in the working position, a position of at least one bearing point can be displaced in a plane, in particular in a plane arranged substantially transversely to a working direction.

Description

[0001] The present invention relates to an agricultural implement, in particular for soil cultivation.

[0002] A wide variety of different agricultural implements are known in agricultural technology for soil cultivation and / or sowing. Such implements are typically mounted or attached to an agricultural tractor and pulled across an agricultural area to be cultivated, for example, a field. A variety of tools are used for soil cultivation, such as loosening, reconsolidation, and / or cutting tools. In addition, such agricultural implements can be equipped with components for seed application, for example, in the form of seed coulters and / or fertilizer application devices.

[0003] In addition to the tools used, a key distinguishing feature is the working width of agricultural implements, which is sometimes several times the permissible transport width for road traffic. Implements with a large working width enable more efficient field cultivation, as fewer passes are required to cover the entire area to be worked. Implements with a large working width are often attached to the tractor vehicle via a frame and have their own chassis. To enable transport of the implements on public roads, a wide variety of folding and folding mechanisms are used, allowing the implements to be converted from their working width to a permissible transport width.

[0004] In the case of implements with a large working width, it can also happen that, in soils with varying contours such as hollows or knolls, the individual tools have different working depths, resulting in inhomogeneous soil cultivation. To enable better soil cultivation in these cases, implements with a large working width can at least partially follow the soil contour using articulated, for example, two-part tool frames. This often involves complex mechanisms that can also be controlled by electronic control units.

[0005] An agricultural soil tillage implement of the type mentioned above is known, for example, from US 2015 129 255 A1. The agricultural implement disclosed here comprises a multi-part frame with attached tools, which can be adjusted between a working position and a transport position by several actuators. The height of the frame parts above the ground can be adjusted by controlling the support wheels that carry the frame part. While this makes it possible to adapt the attachment to the relief of the ground even for frames consisting of more than two parts, this solution requires additional actuators and lever mechanisms, as well as corresponding support wheels, to enable the height adjustment of the frame parts.

[0006] It is therefore the object of the present invention to provide an agricultural implement which has a large working width and enables the most homogeneous cultivation of the soil while at the same time being as simple as possible in construction.

[0007] The object is achieved by an agricultural implement according to the features of claim 1. Advantageous embodiments of the invention are specified in the subclaims.

[0008] The invention relates to an agricultural implement, in particular for soil cultivation, comprising an implement frame and at least one first tool frame which is arranged on the implement frame so as to be foldable about a first pivot axis, in particular laterally, and is connected to the implement frame by at least one first pivot bearing, wherein the first tool frame can be moved between a working position and a transport position by means of at least one first cylinder unit, wherein the first cylinder unit is mounted at a bearing point on the implement frame side and the tool frame side. According to the invention, the implement has at least one adjusting unit which is designed such that, in the working position, a position of at least one bearing point can be displaced in a plane, in particular in a plane arranged substantially transversely to a working direction.

[0009] An implement frame can be designed such that it can be connected to a towing vehicle, for example by being attached or mounted to the towing vehicle. In addition, the implement frame can have one or more wheels for road transport in the transport position and / or for adjusting the depth of the implement in the working position. One or more tool frames can be arranged on the side or end of the implement frame, at least partially pivotable. One or more uniform or different tools, in particular for soil cultivation, can be arranged on the tool frame, for example in the form of rollers, shares, discs, tines or harrows. Pivoting a tool frame can be achieved by means of, in particular, a first cylinder unit, which is mounted at a bearing point on the implement frame side and on the tool frame side.

[0010] The tool frame can be pivoted between a transport position, in which the tool frame can be pivoted essentially perpendicular to the ground, and a working position for soil cultivation. In the working position, the at least one tool frame is pivoted into a defined basic position or starting position for soil cultivation, wherein the tool frame can be aligned essentially in one plane with the device frame and / or essentially parallel to a, in particular level, ground. An alignment deviating from this working position initially set as the basic position is referred to as a deflected working position, which can occur during soil cultivation and differs from the transport position. In the working position, several tool frames can be aligned in one plane, parallel and / or coaxially.The first tool frame can be pivoted about a first pivot axis with at least one first pivot bearing. A pivot bearing of the tool frame can be arranged on the tool frame side of a tool frame-side bearing point of the first cylinder unit. This allows at least part of the weight of the tool frame to be transferred to the tool frame via the pivot bearing. This can result in the tool frame having a tendency to tilt upwards.

[0011] The first cylinder unit can be arrested or locked in the working position, whereby, for example, its length, in particular the distance between its bearing points, can be fixed. This can be achieved, for example, by locking a hydraulic valve. By locking the first cylinder unit in the working position, the tool frame can be aligned essentially rigidly with respect to the device frame, whereby undesired displacements of the tool frame from the working position can initially be avoided. In order to enable adaptation of the working device, in particular of the at least one tool frame, to a ground contour on uneven terrain, the working device has an adjustment unit which is designed such that, in the working position, a position of at least one bearing point can be displaced in a plane.A displacement of the bearing point occurs relative to its position in the working position, which is initially reached when the implement is moved, for example, from the transport position, in particular on level ground, into the working position. The plane can in particular be arranged essentially transversely to a working direction of the implement. A displacement of a bearing point can occur rotationally and / or translationally. By displacing at least one bearing point, in particular when the first cylinder unit is locked in the working position and / or initially extended into the working position, a tool frame can follow the ground contour and pivot about its pivot axis into a deflected working position.In a first, deflected working position, a tool frame can be raised on the outside, in particular relative to a pivot bearing and / or the implement frame, for example when driving through a depression in the terrain. In a second, deflected working position, the tool frame can be lowered on the outside, in particular relative to a pivot bearing and / or the implement frame, for example when driving over a hilltop.

[0012] The at least one first cylinder unit enables the implement to be moved between a wide working position and a more compact transport position. Furthermore, the adjustment unit enables the displacement of at least one bearing point of the first cylinder unit, particularly on the implement frame and / or tool frame side, particularly in the working position, with little additional design effort. This allows a change in the distance between two bearing points, particularly on the implement frame side, for example between two first cylinder units of two tool frames. This has the advantage of enabling the implement to adapt to varying soil contours and more homogeneous soil cultivation with a more uniform working depth of the tools and an equalized distribution of soil pressure, particularly roller pressure.

[0013] In a preferred embodiment, the adjustment unit acts on the tool frame in the working position of the work tool with at least a first force, wherein the adjustment unit is designed such that a second force which is different from the first force and in particular greater than the first force acts on the tool frame in a first deflected working position. In the working position, in which the tool frame can be arranged essentially flush with the device frame, the first force can act on the tool frame. This can, for example, prevent the tool frame from pivoting upwards into a first deflected working position due to at least part of the weight of the work tool. When the tool frame pivots into the first deflected working position, for example due to the floor contour, a second force of the adjustment unit can counteract this lifting.This allows the tool frame to be returned to the working position after passing the ground contour. The second force can be greater than the first force. The first force and the second force both act in the same direction. When the tool frame sinks into the second deflected working position, only the first force can act on the tool frame. This enables the tool frame to follow a ground contour and be returned to the working position. The adjustment unit designed in this way forms, in particular with the first force and the second force, a two-point control which enables the tool frame to be moved into deflected working positions to adapt to the ground contour and to be returned to the working position. The first and / or second force can be generated, for example, by means of pneumatic and / or hydraulic pressure.Furthermore, the first and / or second force can be preset, for example, using bladder accumulators. With two-point control, the deflection of the tool frames can only be adjusted when a preset force, such as a specified roller pressure deviation, is exceeded. Compared to permanently controlled electronics, this has the advantage of reducing wear at the bearing points. Furthermore, the two-point control can be preset, so that no adjustment by the implement operator is necessary. This simplified design with only a few components creates a cost-effective alternative to electronic control systems. The adjustment unit enables self-regulating, control-unit-free hydraulic control for ground contour adaptation of the implement.

[0014] In a particularly preferred embodiment, the adjustment unit has at least a first cylinder unit and / or an adjustment actuator arranged on the device frame and / or tool frame side. The adjustment actuator can be arranged on the device frame and / or the tool frame and have bearing points for receiving the first cylinder unit. A movement of the adjustment actuator or the first cylinder unit can cause a displacement of at least one bearing point on the device frame and / or tool frame side. A combined movement of the adjustment actuator and the first cylinder unit is also conceivable in order to displace a bearing point on the device frame and / or tool frame side. The adjustment actuator allows a bearing point and thus a contour adjustment to be implemented using simple means and at a favorable location on the implement.

[0015] The adjustment actuator preferably has at least one actuator, in particular in the form of a second cylinder unit, for applying a first force and / or a second force to at least one bearing point. Depending on the deflected working position of a tool frame, the actuator can exert a first and / or second force on at least one bearing point of a tool frame. The actuator can be arranged between two bearing points, for example two bearing points on the device frame side of two tool frames. A displacement of the bearing point can occur linearly, for example guided by a guide rail. Depending on the design of the guide rail, a rotational displacement of the at least one bearing point can also occur. The actuator can be designed in the form of a spring unit, a damper, an electrical actuating means and / or a pneumatic or hydraulic cylinder unit.

[0016] In a preferred embodiment, the cylinder unit, which is in particular controllable and / or preloaded, is designed in the form of at least one pneumatic and / or hydraulic cylinder, for example a double-plunger cylinder or floating-piston cylinder. A cylinder can be a single-acting cylinder, a plunger cylinder, a double-acting cylinder, or a telescopic cylinder. The first and / or second cylinder unit can also have two cylinders connected to one another at the base. A preloaded first and / or second cylinder unit can, for example, each be connected to a bladder accumulator. This enables smaller movements of a bearing unit, in particular even when the first cylinder unit is locked.

[0017] In a further preferred embodiment, the adjustment actuator system has a link plate which is mounted so as to be rotatable about an axis of rotation and has at least one bearing point on which the adjustment unit acts. A first and / or second force can be applied to the link plate and thus to the at least one bearing point of the link plate via the adjustment unit, in particular the actuator. A bearing point arranged on the link plate can be displaced rotationally around the axis of rotation of the link plate. The link plate can be designed in the form of a lever, in particular in the form of an angle lever. A transmission ratio can be set via a distance a between the bearing point and the axis of rotation and a distance b between the axis of rotation and the actuator or a bearing of the actuator, whereby the actuator can be designed to be smaller.This has the advantage that weight and required installation space can be reduced and costs can be reduced at the same time.

[0018] The device frame and / or at least one tool frame preferably have a bearing plate for receiving at least one bearing point, and in particular for rotatably receiving the guide plate with a bearing point. The bearing plate can be arranged on the device frame side essentially transversely to the working direction and, for example, accommodate the device frame-side bearing points of the first cylinder units of two tool frames. The guide plate, in particular plate-shaped, can be arranged directly rotatably on the bearing plate and, for example, displaceably accommodate the device frame-side bearing point of a first cylinder unit of the first tool frame. Due to the plate-shaped design, a weight- and space-saving accommodation of the bearing points is thus possible.

[0019] Particularly preferably, the actuator is arranged at least partially within a plane of the bearing plate, wherein in particular the bearing plate has a recess for receiving the actuator. The actuator can be arranged outside the bearing plate, for example parallel to the bearing plate and at least partially in a plane of the bearing plate. The actuator can also be arranged at least partially within the bearing plate, wherein the bearing plate has a recess for receiving the actuator. The link plate can protrude at least partially into or over the recess in the bearing plate, thereby enabling a direct connection of the actuator to the link plate. In the case of an actuator arranged completely within a recess in the bearing plate, the bearing plate can be designed to be closed around the actuator, thereby enabling a better distribution of the acting forces.In addition, this arrangement of the actuator allows for better use of the installation space.

[0020] In a particularly preferred embodiment, at least one first stop is provided to limit movement of the bearing point. The first stop can limit movement of the support point of a tool frame, for example, in the first deflected working position, in order to prevent damage to the adjustment unit, for example. A second stop can be provided to limit movement of the bearing point in a second deflected working position. A stop can be formed on the bearing plate, the tool frame, the link plate, the actuator, in the first cylinder unit and / or in the second cylinder unit. In a space-saving embodiment, the stop can be designed in the form of a positive-locking limitation of the relative movement between the bearing plate and / or link plate.

[0021] The bearing plate is preferably constructed in several parts and has a receptacle for receiving a bearing point, in particular a second tool frame, and / or for forming at least the first stop. The receptacle can be arranged immovably on the bearing plate, wherein a bearing point arranged on the receptacle is designed to be non-displaceable. The receptacle can be arranged on a side of the bearing plate opposite the guide plate. The receptacle can be arranged in a plane with the guide plate and, together with the guide plate, form a first and / or second stop. The small installation space required for forming the first and / or second stop is advantageous here.

[0022] In a preferred embodiment, the adjustment actuator comprises a lever mechanism, which is formed in particular by the link plate and a link lever interacting with the link plate. The link plate can have at least one bearing point for receiving a first cylinder unit of a tool frame, wherein the bearing point can be displaced by pivoting the link plate. The link lever can be arranged in a plane with the link plate and mounted so as to be rotatable about a lever axis, wherein the link plate and the link lever can interact or contact one another in a region between the axis of rotation, the link plate, and the lever axis of the link lever. The actuator, in particular the second cylinder unit, can be connected to the link lever in a bearing and exert at least a first force on it.In the event of contact between the handlebar lever and the handlebar plate, the force exerted by the actuator, and in particular the second cylinder unit, can act on the handlebar plate and cause a displacement of the bearing point.

[0023] Particularly preferably, the handlebar plate and the handlebar lever are rotatably arranged in a plane on the bearing plate, with at least a first contact area being formed between the handlebar plate and the handlebar lever. The arrangement in the same plane can create edge contact for force transmission between the handlebar lever and the handlebar plate. The defined contact area allows force transmission between the handlebar lever and the handlebar plate at a defined location at a specific distance, for example, from the axis of rotation of the handlebar plate. By designing multiple contact areas, different forces can be transmitted between the handlebar lever and the handlebar plate.

[0024] In a particularly preferred embodiment, at least two contact areas are arranged on the same side of the axis of rotation and / or the, in particular, displaceable, bearing point. In addition to the first contact area for transmitting a first force, a second contact area for transmitting a second force can be provided between the handlebar lever and the handlebar plate. The first and second contact areas are arranged on the same side of the axis of rotation of the handlebar plate and / or the displaceable bearing point, whereby the two transmitted forces can act in the same direction or can each generate a moment with the same direction of rotation about the axis of rotation. The first contact area for transmitting a first force can be arranged closer to the axis of rotation of the handlebar plate than the second contact area for transmitting a second force. As a result, the first force can be lower than the second force.The lever mechanism can be designed such that, in the working position and upon deflection of the tool frame into the second deflected working position, the link plate and the link lever contact each other in the first contact area to transmit the first force, and in the first deflected working position in the second contact area to transmit the second force. As a result, depending on the position of the tool frame, different forces can act on the link plate, the displaced bearing point, the first cylinder unit, and the tool frame, in particular as a restoring force into the working position from the deflected working position. The adjustment actuator with the lever mechanism and the two contact areas forms a two-point controller with two different forces, which each act in the same direction.

[0025] Particularly preferably, the handlebar plate and / or the handlebar lever have a projection in at least one contact area for interaction. The projection allows a contact area for force transmission and, in particular, the distances from the rotation axis to be precisely defined. Furthermore, the projections can be designed to be particularly wear-resistant.

[0026] Further details of the invention can be found in the figures and the description of the figures, which show a preferred embodiment of the invention.

[0027] They show: Fig. 1: a perspective view of an agricultural implement with a first and second tool frame in a working position with the respective associated first cylinder units; Fig. 2: a detailed view of an adjustment unit for the first tool frame with a second cylinder unit in the working position; Fig. 3: a representation of the adjustment unit from Fig. 2 with the first tool frame in a first deflected working position; Fig. 4: a representation of the adjustment unit from Fig. 2 or Fig. 3 with the first tool frame in a second deflected working position; Fig. 5: an adjustment unit with a lever mechanism in the working position; Fig. 6: the adjustment unit Fig. 5 with the first tool frame in a first deflected working position; and Fig. 7: the adjustment unit Fig. 5 or Fig. 6 with the first tool frame in the second deflected working position.

[0028] In Fig. 1 shows an agricultural implement 10 for soil cultivation with an implement frame 12 which can be coupled to a towing vehicle (not shown). A first tool frame 14 and a second tool frame 24 are arranged on the implement frame 12 and extend essentially transversely to a working direction A of the implement 10. The tool frames 14, 24 have a plurality of tools, for example in the form of discs or rollers 70, for soil cultivation, which may also include the application of seed and / or fertilizer. The tool frames 14, 24 can also be arranged one behind the other in the working direction A or, as shown, side by side.

[0029] The tool frames 14, 24 are each connected to the device frame 12 by means of first and second pivot bearings 28, 60 and can be pivoted about a first and second pivot axes 16, 26. The tool frames 14, 24 are pivoted by first cylinder units 18, whereby the tool frames 14, 24 can be pivoted between a substantially vertical transport position and a substantially horizontal working position. In the working position, the tool frames 14, 24 are arranged next to one another in a plane. The first cylinder units 18 in the form of hydraulic cylinders are mounted on the device frame side and the tool frame side at bearing points 20.

[0030] According to the invention, the working device 10 has at least one adjustment unit 28, which is designed such that in the working position a position of at least one bearing point 20 can be displaced in a plane, in particular in a plane arranged substantially transversely to a working direction A. In the Fig. In the embodiment shown in Figure 1, a bearing point 20 of the first tool frame 14 on the device frame side is designed to be displaceable by an adjustment unit 28. The adjustment unit 28 can have a first cylinder unit 18 and an adjustment actuator 72.

[0031] In Fig. Figure 2 shows a detailed view of an adjustment unit 28 of the working device 10 for the first tool frame 14, viewed in the working direction A. The first and second tool frames 14, 24, with rollers 70 arranged thereon, are each pivoted about the first and second pivot axes 16, 26 into the working position and are arranged in a plane and essentially horizontal to the ground. The two first cylinder units 18 are essentially fully extended in order to move the tool frames 14, 24 into this working position or home position. The first and second pivot bearings 58, 60 are arranged on the device frame side of the tool frame-side bearing points 20 of the tool frames 14, 24.

[0032] The illustrated tool frame 12 has a bearing plate 22 for receiving a first and second pivot bearing 58, 60 of the tool frames 14, 24. The tool frame-side bearing points 20 of the first cylinder units 18 are also arranged on the bearing plate 22. The tool frame-side bearing point 20 of the second tool frame 24 or its first cylinder unit 18 is arranged on a plate-shaped receptacle 46, which is rigidly connected to the bearing plate 22 and arranged parallel to it. The tool frame-side bearing point 20 of the first tool frame 14 or its first cylinder unit 18 is arranged on a guide plate 30, which is arranged on the bearing plate 22 so as to be rotatable about a rotation axis 32. As a result, when the guide plate 30 rotates, the bearing point 20 of the first tool frame 14 arranged thereon can be pivoted. The bearing point 20 has a distance a from the axis of rotation 32 of the handlebar plate 30.

[0033] On a side opposite the bearing point 20, the link plate 30 has a bearing 50 for accommodating an adjustment actuator 72 with an actuator 34 in the form of a second cylinder unit 36. The bearing 50 is arranged at a distance b from the rotational axis 32 of the link plate 30. The link plate 30 is designed as a lever, in particular as an angle lever. The actuator 34, in particular the second cylinder unit 36, is designed as a double-plunger cylinder. However, an embodiment of the actuator 34 in the form of spring elements preloaded in two ways is also conceivable. The actuator 34 is arranged in a recess 48 in the bearing plate 22, wherein the bearing plate 22 is designed to be completely closed around the recess 48. The actuator 34 is connected to the bearing plate 22 and the link plate 30.

[0034] The second cylinder unit 34 in the form of a double-plunger cylinder has a first piston 38 and a second piston 40. An arrangement of two pistons connected at the base is also conceivable. The first and second pistons 38, 40 of the actuator 34 and the second cylinder unit 36 ​​in the form of the double-plunger cylinder press with different forces F1, F2 and are in particular preloaded with predetermined pressures. The first force F1 can be greater than the second force F2. Preloading of the second cylinder unit 34 and in particular of the first and second pistons 38, 40 can be achieved, for example, by means of a bladder accumulator. In the working position or home position, the first force F1 can act on the first tool frame 14 via the link plate 30, the bearing point 20 and the first cylinder unit 18.This design of the adjustment unit 28 enables the first tool frame 14 to react to changes in the ground contour by being able to pivot about its first pivot axis 16.

[0035] In the Fig. In the working position shown in Figure 2, during operation on one level, the first piston 38 is fully retracted and the second piston 40 is fully extended. As a result, the first force F1 acts on the first tool frame via the adjustment unit 28, preventing the first tool frame 14 from pivoting upward and allowing a uniform roller pressure to be set, particularly in comparison to the second tool frame 24.

[0036] In Fig. 3, the first tool frame 14 is shown in an upwardly deflected, first working position, as may occur, for example, when traveling through a depression in the ground. Here, the first piston 38 of the actuator 34 or the second cylinder unit 36 ​​is also fully retracted, while the second piston 40 is also retracted, but only to the extent that a uniform roller pressure is achieved again, particularly in comparison to the second tool frame 24 and its tools, particularly in the form of a roller 70.

[0037] A first tool frame 14 pivoted downwards into a second deflected working position is in Fig. 4 shows how this can occur, for example, when driving over a hilltop. In the second deflected working position of the first tool frame 14, the first piston 38 is extended until a uniform roller pressure is achieved again. The second piston 40 is also fully extended. The preload of the actuator 34, in particular of the first and second pistons 38, 40 of the second cylinder unit 36, is preset, for example by bladder accumulators, whereby, for example, theoretical and / or practically tested influences of a change in the ground contour on the roller pressure can be taken into account. Complex electronic control is therefore unnecessary.

[0038] To prevent overloading of the adjustment unit 28, in particular of the actuator 34, a first stop 42 and a second stop 44 are integrated into the link plate 30, which limit the maximum travel of the bearing point 20 and the link plate 30 in both directions. The first and second stops 42, 44 are formed by the link plate 30 and the receptacle 46, which, due to their respective shapes, contact each other in a first and second contact area 54, 56 and thus enable a limitation of the movement of the link plate 30. The first stop 42 ( Fig. 3) limits a movement of the first tool frame 14 in the first deflected working position, whereas the second stop 44 ( Fig. 4) limits the movement of the first tool frame 14 in the second deflected working position. In the working position, i.e. on level ground ( Fig. 2), the first and second stops 42, 44 are not in contact.

[0039] The adjustment actuator 72 of the adjustment unit 28 ( Fig. 5) can also have a lever mechanism for displacing the bearing point 20 and applying at least a first force F1, which is formed by the link plate 30 and a link lever 52 interacting with it. The link lever 52 enables the use of a single-acting, in particular a preloaded, actuator 34, for example in the form of a spring element or single-acting cylinder, whereby the number of preloaded elements can be further reduced.

[0040] In addition to the link plate 30, a link lever 52 is arranged on the bearing plate 22 so as to be rotatable about a lever axis 78. The link lever 52 is arranged on a side of the recess 48 opposite the link plate 30. The actuator 34 arranged in the recess 48, for example in the form of a single-acting second cylinder unit 36, is connected to the bearing plate 22 and to the link lever 52 via a bearing 50. The link plate 30 and the link lever 52 are arranged in the same plane and can contact each other in a first contact area 54 and a second contact area 56. In order to create clearly defined contact areas 54, 56, both the link plate 30 and the link lever 52 have a projection 62 on the sides facing each other for mutual contact. In the Fig. 5, both the first and the second contact area 54, 56 of the handlebar plate 30 and the handlebar lever 52 are in contact, with a first force F1 acting which is applied by the actuator 34.

[0041] In Fig. 6 shows the working device 10 with the first tool frame 14 in a first deflected working position. Due to the raised tool frame 14 in the first deflected working position, the associated bearing point 20 on the control plate 30 on the device frame is also deflected or displaced. The control plate 30 is pivoted about its axis of rotation 32 such that the control plate 30 and the control lever 52 are only in contact in the second contact area 56. The bearing point 20 on the control plate 30 is arranged at a distance a from the axis of rotation 32 of the control plate 30. The second contact area 56, in particular its projection 62, is arranged at a distance c from the axis of rotation 32 of the control plate 30. In the second contact area 56, the second force F2, which is greater than the first force F1, acts on the handlebar plate 30 and thus the first tool frame 14 via the actuator 34 and the handlebar lever 52.

[0042] In a second deflected working position ( Fig. 7) of the first tool frame 14, the link plate 30 and the link lever 52 are only in contact in the first contact area 54, wherein the first contact area 54 has a smaller distance d from the axis of rotation 32 of the link plate 30 than the second contact area 56 with its distance c. In this case, the first force F1 from the actuator 34 and the link lever 52 acts on the link plate 30 and the first tool frame 14. Due to the different distances c, d of the first and second contact areas 54, 56 from the axis of rotation 32 of the link plate 30, forces of different magnitudes can act on the link plate 30 and on the first tool frame 14 and its tools, in particular rollers 70. As a result, a uniform pressure of the tools, in particular the rollers 70, against the ground can be achieved both in the working position and in the first and second deflected working positions of the first tool frame 14.The magnitude of the acting forces F1, F2 can also be influenced by the distances between the first and second contact areas 54, 56 relative to the bearing 50 of the actuator 34 on the handlebar lever 52.

[0043] A further embodiment of the adjustment unit 28 in the form of only a first cylinder unit 18 is shown in Fig. 8. A bearing point 20 on the tool frame side can be displaced from a working position, in particular on level ground, by means of the first cylinder unit 18. The bearing point 20 of the first cylinder unit 18 on the device frame side is fixed to the device frame 12, for example, on the bearing plate 22. The first cylinder unit 18 is designed in the form of a floating piston cylinder, which has a floating piston 66, which is designed to be movable, at least in partial areas, independently of a piston rod 64 in the first cylinder unit 18.

[0044] In Fig.9 shows the first cylinder unit 18 of the adjustment unit 28 in the working position, in particular on a level floor. The floating piston 66 is displaced to the bottom of the cylinder, and the piston rod 64, which is movably mounted in the floating piston 66, is not fully extended. The floating piston 66 rests with a first shoulder 80 against a third stop 74, whereby the floating piston 66 can only drive the piston rod 64 until it rests against the bottom of the first cylinder unit 18. In the first cylinder unit 18, a preset pressure acts on a circular area A1 of the piston rod 64 and an annular area A2 of the floating piston 66. The preset pressure of the first cylinder unit 18 acts on the piston rod 64 with its circular area A1 on the piston chamber side, whereby the piston rod 64 acts with a first force F1 on the bearing point or the first tool frame (not shown).

[0045] When the first tool frame 14 moves into the second deflected working position, i.e., a lowered position on the outside, the piston rod 64 can follow the movement and extend further, with the force F1 continuing to act on the first tool frame. The floating piston 66 remains at the bottom of the first cylinder unit 18. Only when a fourth stop 76, e.g., annular, of the piston rod 64 contacts a second shoulder 82 of the floating piston 66, is the extending movement of the piston rod 64 limited.

[0046] In a first deflected working position (not shown) of the first tool frame 14, i.e., a position raised on the outside, the piston rod 64, which in the working position already rests with its third stop 74 against the first shoulder 80 of the floating piston 66, displaces the floating piston 66 along with it, so that in this case a second force F2, which is greater than the first force F1, acts on the first tool frame. This results from the fact that in the first deflected working position, both the piston rod 64 and the floating piston 66 retract, and thus the pressure in the first cylinder unit 18 acts on both the circular area A1 of the piston rod 64 and the annular area A2 of the floating piston 66. Reference symbol 10 Work equipment 12 device frames 14 First tool frame 16 First swivel axis 18 First cylinder unit 20 bearing point 22 bearing plate 24 Second tool frame 26 Second swivel axis 28 Adjustment unit 30 handlebar plate 32 axis of rotation 34 Actuator 36 Second cylinder unit 38 First piston 40 Second piston 42 First attack 44 Second attack 46 recording 48 recess 50 Storage 52 handlebar levers 54 First contact area 56 Second contact area 58 First pivot bearing 60 Second pivot bearing 62 cantilever 64 piston rod 66 floating pistons 68 Lever axis 70 roller 72 Adjustable actuators 74 Third attack 76 Fourth attack 78 Lever axis 80 First paragraph 82 Second paragraph a distance b distance c distance d distance F1 Power F2 Force A1 circular area A2 ring surface A working direction QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] US 2015 129 255 A1

[0005]

Claims

[1] Agricultural implement, in particular for soil cultivation, comprising an implement frame (12) and at least one first tool frame (14) which is arranged on the implement frame (12) so as to be foldable about a first pivot axis (16), in particular laterally, and is connected to the implement frame (12) by at least one first pivot bearing (58), wherein the first tool frame (14) can be moved between a working position and a transport position by means of at least one first cylinder unit (18), wherein the first cylinder unit (18) is mounted on the implement frame side and the tool frame side in a bearing point (20), characterized by that the working device (10) has at least one adjustment unit (28) which is designed such that in the working position a position of at least one bearing point (20) can be displaced in a plane, in particular in a plane arranged substantially transversely to a working direction (A). [2] Working device according to claim 1, characterized by in that the adjusting unit (28) acts on the tool frame (14, 24) with at least a first force (F1) in a working position of the working device (10), wherein the adjusting unit (28) is designed such that a second force (F2) which is different from the first force (F1), in particular greater, acts on the tool frame (14, 24) in a first deflected working position. [3] Working device according to claim 1 or 2, characterized by that the adjustment unit (28) has at least a first cylinder unit (18) and / or an adjustment actuator (72) arranged on the device frame side and / or the tool frame side. [4] Working device according to one of the preceding claims, characterized bythat the adjustment actuator (72) has at least one actuator (34), in particular in the form of a second cylinder unit (36), for applying a first force (F1) and / or second force (F2) to at least one bearing point (20). [5] Working device according to one of the preceding claims, characterized by that the, in particular controllable and / or prestressed, cylinder unit (18, 36) is designed in the form of at least one pneumatic and / or hydraulic cylinder, for example a double plunger cylinder or floating piston cylinder. [6] Working device according to one of the preceding claims, characterized by that the adjustment actuator (72) has a link plate (30) rotatably mounted about a rotation axis (32) with at least one bearing point (20) on which the adjustment unit (28) acts. [7] Working device according to one of the preceding claims, characterized bythat the device frame (12) and / or at least one tool frame (14) have a bearing plate (22) for receiving at least one bearing point (20), and in particular for rotatably receiving the handlebar plate (30) with a bearing point (20). [8] Working device according to one of the preceding claims, characterized by that the actuator (34) is arranged at least partially within a plane of the bearing plate (22), wherein in particular the bearing plate (22) has a recess (48) for receiving the actuator (34). [9] Working device according to one of the preceding claims, characterized by that at least one first stop (42) is provided to limit a movement of the bearing point (20). [10] Working device according to one of the preceding claims, characterized bythat the bearing plate (22) is designed in several parts and has a receptacle (46) for receiving a bearing point (20), in particular a second tool frame (24), and / or for forming at least the first stop (42). [11] Working device according to one of the preceding claims, characterized by that the adjustment actuator (72) comprises a lever mechanism which is formed in particular by the handlebar plate (30) and a handlebar lever (52) interacting therewith. [12] Working device according to one of the preceding claims, characterized by that the handlebar plate (30) and the handlebar lever (52) are rotatably arranged in a plane on the bearing plate (22), wherein at least one first contact region (54) is formed between the handlebar plate (30) and the handlebar lever (52). [13] Working device according to one of the preceding claims, characterized bythat at least two contact areas (54, 56) are arranged on the same side of the axis of rotation (32) and / or the, in particular displaceable, bearing point (20). [14] Working device according to one of the preceding claims, characterized by that the handlebar plate (30) and / or the handlebar lever (52) have a projection (62) for interaction in at least one contact area (54, 56).

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