Device for the mechanical removal of weeds arranged laterally adjacent to a row of crops

Abstract

Device (1) for the mechanical removal of weeds arranged laterally adjacent to a row of crops, characterized by - at least one support structure (3) which can be arranged at least indirectly at the front or rear or between the axles of a work vehicle (2), - at least one round brush (6) which can be driven about a rotational axis (5) which is transverse to a longitudinal axis (X) of the work vehicle (2) and horizontally alignable, - at least one coupling device (11) connecting the round brush (6) to the support structure (3) in a height-adjustable manner and - at least one scanning wheel (20) which is arranged in a fixed position with respect to the round brush (6) and is indirectly connected to the round brush (6), which is arranged to be rotatable about an axis which is aligned parallel to the axis of rotation (5) of the round brush (6).

Description

Technical FieldThe invention relates to a device for removing weeds arranged laterally adjacent to a crop plant row. The invention also relates to a working vehicle.Prior ArtIn the course of creating a more environment-friendly agriculture, it is known to remove or excrete weeds purely mechanically instead of using chemical weed controlling agents. For this purpose, for example, a device according to DE 1 962 961 A can be used. It is also known to use a crop, a milling cutter or a jacket for the mechanical removal of weeds.Disclosure of the InventionAn object of the invention is to improve mechanical removal of weeds arranged laterally adjacent to a crop row.This object is achieved by the independent claim. Advantageous embodiments are reproduced in the dependent claims, the following description and the figures, wherein these embodiments, taken individually or in combination of at least two of these embodiments with one another, can represent an advantageous and / or further developing aspect of the invention.A device according to the invention for the mechanical removal of weeds arranged laterally adjacent to a crop plant row is characterized byat least one holding structure which can be arranged at least indirectly on the front side or on the rear side or in an interaxant manner on a working vehicle,at least one round brush drivable about an axis of rotation which can be aligned transversely to a longitudinal axis of the working vehicle and horizontally,at least one coupling device connecting the round brush to the holding structure in a vertically movable manner, andat least one scanning wheel which is arranged in a fixed manner with respect to the round brush and is connected indirectly to the round brush and is arranged such that it can rotate about an axis which is aligned parallel to the axis of rotation of the round brush.Due to the stationary arrangement of the scanning wheel relative to the round brush and at the same time the height adjustability of the round brush, the round brush rotating about its axis of rotation can be held in constant contact with a ground, so that the round brush engages with the ground at constant depth in order to mechanically remove or tear weeds. The contact can be designed in such a way that the round brush does not remove too much material from the ground, nor too little to remove the weed completely. This ensures that a critical region directly next to the crop plants of a crop row is optimally deep and thus simultaneously brushed in a culture-preserving and very effective manner. If weeds remained in this area, this would lead, for example, to the requirement for weeding by hand and thus to very high costs. This can be reliably avoided by the maximum effectiveness of the device according to the invention.A crop will always require a certain working depth in order to be able to cut weeds. In contrast, the device according to the invention already operates at a relatively low working depth due to the use of at least one round brush rotated about a horizontal axis of rotation, which also enables a better deradication of the weed. As a result, the weeds torn out of the ground by the device or the at least one round brush and the soil moved by the device or the round brush dry off rapidly, as a result of which the weeds pass. In addition, the device according to the invention also operates very precisely under actually too wet conditions, in particular since the device or its at least one round brush does not push on soil, as is the case when using a chopping blade. Moreover, a crop often only undercuts the weed without derooting it, so that the weed grows further. Moreover, the soil can be treated at an earlier time or at shorter time intervals with the device according to the invention than with the crop, as a result of which the weed cannot become as large and resistant at all.Furthermore, the use according to the invention of a round brush rotating about its axis of rotation for removing weeds has the advantage over a crop that no soil is laterally displaced with the round brush, as a result of which the crop plant could be wasted. Instead, the soil is preferably thrown backwards by means of the round brush, i.e. in a direction parallel to the crop row. Furthermore, the use according to the invention of a round brush rotating about its axis of rotation for removing weeds is ideal for sandy soils. A crop, on the other hand, moves each stone hit and thereby laterally displaces it. This also allows the crop plant to be destroyed. Corresponding disadvantages are associated with the use of a milling cutter for removing weeds.The holding structure of the device according to the invention can be arranged indirectly on the working vehicle or fastened to the latter, for example, via a frame of an attachment mounted on the working vehicle at the front or at the rear or intermediate axis, that is to say between a front axle and a rear axle of the working vehicle, for example a heel attachment or the like. In this case, it is also possible, for example, to retrofit an existing attachment with the device according to the invention. In the simplest structural case, the holding structure can have a base plate which can be fastened to an attachment, for example by means of mechanical fastening means, such as, for example, screw connections.The round brush of the device according to the invention is connected to the holding structure in such a way that the axis of rotation of the round brush runs transversely to the longitudinal axis of the working vehicle and is aligned horizontally when the holding structure is arranged on an attachment or on the working vehicle. For removing weeds, the round brush is preferably driven in such a way that the round brush rotates in the same direction as wheels of the working vehicle, as a result of which the round brush throws soil and the removed weed to the rear.The round brush has a shaft and bristles radially protruding from the shaft. The bristles can be formed, for example, from a plastic, for example from a fiber-reinforced plastic. A diameter of the round brush can be, for example, in a range from 80 mm to 400 mm, preferably from 80 mm to 300 mm, particularly preferably from 80 mm to 200 mm. An axial length of the round brush can be, for example, in a range from 250 mm to 460 mm, preferably in a range from 250 mm to 350 mm, particularly preferably in a range from 280 mm to 300 mm. A length of the bristles of the round brush can be, for example, in a range from 15 mm to 80 mm. The shorter-naturally up to a reasonable minimum length-the bristles of the round brush, the less soft they make any obstacles, whereby the working result is more uniform and thus more quality. A diameter of the bristles of the round brush can be, for example, in a range from 0.7 mm to 1.2 mm, in particular 0.9 mm. The material of the bristles of the round brush can be, for example, polycaprolactam or steel. By a suitable selection of the properties of the round brush in the ranges mentioned, the device according to the invention works very precisely and finely or in a targeted manner. The shaft of the round brush can, for example, be pushed onto a drivable drive shaft of the device and connected to the drive shaft in a rotationally fixed manner, for example by means of at least one grub screw. The drive shaft together with the round brush arranged thereon can form an easily replaceable assembly.The coupling device of the device according to the invention is preferably designed such that the round brush is connected to the holding structure such that it can be moved vertically exclusively parallel to a vertical plane, that is to say the height mobility of the round brush has only two degrees of freedom. The vertical plane is oriented parallel to a longitudinal direction of the working vehicle. The coupling device can have at least one link which is arranged pivotably in a vertical plane and via which the round brush is connected to the holding structure in a vertically movable manner.The fact that the scanning wheel of the device according to the invention is arranged in a fixed position with respect to the round brush means that the scanning wheel experiences a corresponding change in position in the event of a change in position of the round brush, and vice versa. For this purpose, the scanning wheel is indirectly connected to the round brush via at least one connecting element. The scanning wheel is also arranged vertically movable, namely in such a way that it indirectly drives the round brush when it is displaced or moved in the height direction. This reliably ensures that the round brush always engages into the ground to a desired and constant depth. The individual assemblies then operate independently of one another, so that each assembly can adapt individually to the soil respectively processed by it. If instead a single continuous round brush were used for several crop plants, a clearly coarser working result would be obtained, in addition damage to the crop plants could not be ruled out.The device according to the invention can also have its own assembly per crop row present, which assembly can have at least one holding construction, at least one round brush, at least one coupling device and at least one scanning wheel. The device according to the invention can thus have two or more such assemblies which can be arranged laterally spaced apart from one another with respect to a longitudinal direction of the working vehicle.According to an advantageous embodiment, the coupling device has at least one parallelogram guide unit. As a result, the round brush is positively guided parallel to a vertical plane, namely in such a way that a holding section of the coupling device holding the round brush does not change its angle of inclination during a vertical movement of the round brush. The parallelogram guide unit has at least two guide links which are arranged one above the other and at a distance from one another and which can be connected, on the one hand, in an articulated manner to the holding structure and, on the other hand, in an articulated manner to the holding section of the coupling device which holds the round brush.According to a further advantageous embodiment, the device has at least one tension spring which is connected at least indirectly to the holding structure on the one hand and at least indirectly to the round brush on the other hand, so that a tensile force directed away from the ground can be applied to the round brush. As a result, the round brush does not load the entire weight force, which is formed at least by the weight force of the scanning wheel, the weight force of the round brush, the weight force of components of the device connecting the scanning wheel to the round brush, and movable components of the coupling device, on the ground, which could damage the ground. In addition, the round brush is hereby movable in height with a lower exertion of force, which improves the sensitivity or the response behavior of the device. The tension spring can be designed, for example, as a helical spring. The tension spring can, for example, engage on the one hand in the region of an axis of rotation, arranged on the holding structure, of a higher-arranged upper guide link of the parallelogram guide unit and on the other hand in the region of an axis of rotation, arranged on the holding section of the parallelogram guide unit moved with the round brush, of a lower-arranged lower guide link of the parallelogram guide unit.According to a further advantageous embodiment, the apparatus has at least one actuatable adjusting device, with which an arrangement height of the scanning wheel relative to an arrangement height of the round brush can be adjusted. As a result, the end ring depth or working depth of the round brush can be set to a desired extent at any time. The actuating device can be configured to be actuatable manually or automatically, for example.According to a further advantageous embodiment, the adjusting device has at least one adjusting unit arranged at an inclination and configured to be telescopic. The adjusting unit can be connected, for example, rigidly to the holding section of the parallelogram guide unit that is moved with the round brush. The adjusting unit can have at least two adjusting elements guided linearly one inside the other. The adjusting unit can have, for example, at least one manually actuatable crank, with which an adjusting screw can be actuatable, which can be connected to the at least two adjusting elements in such a way that a rotation of the adjusting screw about its longitudinal central axis leads to an adjustment of the adjusting device or to a telescoping process. The adjusting elements can have polygonal cross-sectional areas, for example, so that the adjusting elements are guided against one another in a rotationally secure manner. For example, the adjusting elements can each be designed as a square profile.According to a further advantageous embodiment, the round brush has at least two brush sections with bristles arranged axially spaced apart from one another. As a result, the round brush can be designed in such a way that weeds can be removed simultaneously on both sides of a crop plant row with it. During such a removal process, the crop plants are arranged in a central region of the round brush, at which no bristles are present, whereby damage to the crop plants is reliably prevented. An axial width of the respective bristled brush section can be, for example, in a range from 60 mm to 160 mm, for example 100 mm or 140 mm. An axial distance between the two bristled brush sections can be, for example, in a range from 20 mm to 100 mm. Between the two brush sections, a central section of the round brush can be arranged, on which no bristles are arranged. The brush sections and the middle section of the round brush can be arranged on a common shaft of the round brush. Alternatively, the round brush can be of modular construction, wherein each section of the round brush has its own shaft and can thus be pushed individually onto a drivable drive shaft of the device. Between the drive shaft and the respective shaft of the round brush or a section thereof, a rotation prevention means can be formed by at least one form-fit. For example, the drive shaft and the respective shaft of the round brush or a section thereof can have a polygonal, for example square or hexagonal, cross-sectional area. Due to the modular construction of the round brush, the round brush can be easily adapted to the respective application, for example in order to be able to vary an axial distance between the outer brush sections.According to a further advantageous embodiment, the round brush has three brush sections with bristles arranged axially spaced apart from one another, wherein the two outer brush sections arranged axially on the outside are of equal length and the middle brush section is shorter than the outer brush sections. As a result, weeds, for example, in the region of a double crop row, for example a dam culture, can be removed with the round brush, the two outer brush sections removing the weed on mutually applied sides of the two crop rows and the middle brush section removing weeds between the two crop rows. The bristles of the middle brush section can be shorter than the bristles of the outer brush sections, for example, or have the same length as the bristles of the outer brush sections. A length of a brush section is to be understood as an axial length of the brush section. Between the central brush section of the round brush and the respective outer brush section of the round brush, a section of the round brush can be arranged on which no bristles are arranged. The sections of the round brush can be arranged on a common shaft of the round brush. Alternatively, the round brush can be of modular construction, wherein each section of the round brush has its own shaft and can thus be pushed individually onto a drivable drive shaft of the device. Between the drive shaft and the respective shaft of the round brush or a section thereof, a rotation prevention means can be formed by at least one form-fit. For example, the drive shaft and the respective shaft of the round brush or a section thereof can have a polygonal, for example square or hexagonal, cross-sectional area. Due to the modular construction of the round brush, the round brush can be easily adapted to the respective application, for example in order to be able to vary an axial distance between the central brush section and the respective outer brush section. An axial width of the respective outer brush section can be, for example, in a range from 50 mm to 150 mm, for example 100 mm. An axial width of the middle brush section can be, for example, in a range from 20 mm to 80 mm, for example, 40 mm. An axial distance between the respective outer brush section and the middle brush section can be, for example, in a range from 20 mm to 40 mm, for example, 30 mm.According to a further advantageous embodiment, the device has at least one protective cover arranged at least partially above the round brush and at a radial distance from the round brush. The protective cover prevents material lifted from the round brush from being thrown freely into the environment, which could be accompanied, among other things, by a high dust generation. The material removed by the round brush can therefore also not be thrown onto the round brush from above, which would impair the effectiveness of the round brush. The protective cover can have a ring segment-shaped cross-sectional area. The protective cover can extend around the round brush by about 180°, for example, wherein an edge of the protective cover, which is located on that side of the round brush to which the round brush moves the removed material, can be arranged lower than an edge of the protective cover opposite this edge. The protective cover can be made partially or completely from a metal, a metal alloy, a plastic or a composite material.According to a further advantageous embodiment, the device has at least one drive unit for driving the round brush. The drive unit may include, for example, at least one hydraulic motor connectable to a hydraulic system of the work vehicle or at least one electric motor connectable to a power supply of the work vehicle.According to a further advantageous embodiment, the drive unit is configured to drive the round brush at a rotational speed in a range from 2,000 U / min to 4,000 U / min, preferably 3,000 U / min to 4,000 U / min. A speed of the round brush in this high speed range ensures a very thorough and constant operation of the round brush or device, which makes the device very effective.According to a further advantageous embodiment, the device has two scanning wheels which are arranged in a fixed position with respect to the round brush and are indirectly connected to the round brush and are arranged such that they can rotate about a common axis which is aligned parallel to the axis of rotation of the round brush. The scanning wheels can be arranged relative to one another in such a way that they roll on mutually opposite sides of the at least one crop plant row. As a result, the conditions laterally with respect to the crop plant row are taken into account on both sides during weed removal, whereby the quality of the work result is further improved and at the same time a treatment of the soil protecting the crop plants is ensured.According to a further advantageous embodiment, the device has at least one adjusting device, with which an axial distance between the two scanning wheels can be adjusted. As a result, the device can be easily adapted to the respective application. The adjusting device can be configured to be manually or automatically actuatable.According to a further advantageous embodiment, the holding structure can be fastened to a displacement frame of the working vehicle. This enables a displacement of the device transversely to a direction of travel of the work vehicle in order to be able to adapt the position of the device precisely to the respective circumstances.A working vehicle according to the invention, in particular a tractor, has at least one device according to one of the abovementioned configurations or a combination of at least two of these configurations with one another.The working vehicle has the advantages mentioned above with respect to the device. The working vehicle can have, for example, a displacement frame arranged on the rear, on which the device can be arranged.In the following, the invention is explained by way of example with reference to the appended figures on the basis of a preferred embodiment, wherein the features explained below can represent an advantageous and / or further developing aspect of the invention both taken individually and in different combinations with one another.Brief Description of the FiguresIt shows: FIG. 1 shows a schematic side view of an exemplary embodiment of a device according to the invention; and FIG. 2 is a schematic rear view of the device shown in FIG. 1.DETAILED DESCRIPTION OF THE FIGURESIn the figures, identical or functionally identical components are provided with the same reference numerals. Detailed description of such components may be omitted to avoid unnecessary repetition.FIG. 1 shows a schematic side view of an exemplary embodiment of a device 1 according to the invention for machine removal of weeds arranged laterally adjacent to a crop plant row, not shown.The device 1 has a holding structure 3 which can be arranged at least indirectly on the front side or on the rear side or on the intermediate axis on a working vehicle 2, of which only a component 9, which can also be a component of a displacement frame of the working vehicle 2, for example, is indicated schematically. The holding structure 3 is connected to the working vehicle 2 by mechanical connecting means, not shown, and / or by material bonding.The holding construction 3 is designed as a metal sheet with a U-shaped cross-sectional area, wherein a web of the holding construction 3 shown in FIG. 2 is connected to the work vehicle 2 and two limbs 4 of the holding construction 3 which run parallel to one another and are designed as right-angled bends and project to the left in FIG. 1 are arranged on mutually opposite vertically running edges of the web, of which limbs only one limb 4 is shown in FIG. 1. The holding structure 3 can be connected to the working vehicle 2 or the component 9 in a materially bonded manner or by means of mechanical fastening means, not shown. The latter permits subsequent adaptation or readjustment of the device 1 or of its position relative to the component 9.Furthermore, the device 1 has at least one round brush 6 which can be driven about an axis of rotation 5 which is oriented transversely to a longitudinal axis X of the working vehicle 2 lying in the plane of the drawing of FIG. 1 and horizontally and is oriented perpendicularly on the plane of the drawing of FIG. 1. The round brush 6 has three brush sections 7 arranged axially spaced apart from one another and having radially extending bristles, which are not shown, wherein the two outer brush sections 7 arranged axially on the outside, of which only one outer brush section 7 is shown in FIG. 1, are formed to be of equal length axially and the middle brush section shown in FIG. 2 is formed to be shorter axially than the outer brush sections 7. The round brush 6 has a shaft 8, from which the bristles project radially.In addition, the device 1 has at least one drive unit 32, schematically indicated by a dashed line, for driving the round brush 6. The drive unit 32 is configured to drive the round brush 6 at a rotational speed in a range from 2,000 U / min to 4,000 U / min. The drive unit 32 is designed as a hydraulic motor.In addition, the device 1 has at least one protective cover 10 arranged at least partially above the round brush 6 and at a radial distance from the round brush 6. The protective cover 10 has a ring segment-shaped cross-sectional area. The protective cover 10 extends on the rear side of the round brush 6 as far as a region lying below the axis of rotation 5 of the round brush 6.The apparatus 1 has at least one coupling device 11 which connects the round brush 6 to the holding structure 3 in a vertically movable manner. The coupling device 11 has a parallelogram guide unit 12. The parallelogram guide unit 12 has an upper guide link 13 and a lower guide link running parallel to the upper guide link 13. The two guide links 13 and 14 are connected on the one hand in articulated fashion to the holding structure 3 or its limb 4 and are thereby connected to the holding structure 3 such that they can be pivoted about horizontal axes which are perpendicular to the plane of the drawing of FIG. 1. On the other hand, the two guide links 13 and 14 are connected in an articulated manner to a holding section 15 of the coupling device 11 which holds the round brush 6 and are thereby connected to the holding section 15 such that they can be pivoted about horizontal axes which are perpendicular to the plane of the drawing of FIG. 1.The holding section 15 has a holding element 16 which is designed as a metal sheet with a U-shaped cross-sectional area and has a web shown in FIG. 2 and, on mutually opposite vertically running edges of the web, two limbs 17 which run parallel to one another and are designed as right-angled bends and project to the right in FIG. 1, of which only one limb 17 is shown in FIG. 1. The guide links 13 and 14 are articulated to the legs 17.Furthermore, the holding section 15 has a fork 18 connected to a lower end of the holding element 16, on which the round brush 6 is arranged such that it can rotate about its axis of rotation 5. The protective cover 10 is fixed to the fork 18.The device 1 has two tension springs 19, of which only one tension spring 19 is shown in FIG. 1. The respective tension spring 19 is connected at least indirectly to the holding construction 3 or its respective leg 4 on the one hand and indirectly to the round brush 6 via the holding section 15 on the other hand, so that a tensile force directed away from the ground is applied to the round brush 6.In addition, the device 1 has two scanning wheels 20, which are arranged in a fixed position with respect to the round brush 6 and are indirectly connected to the round brush 6, of which only one scanning wheel 20 is shown in FIG. 1. The scanning wheels 20 are rotatably arranged about a common axis 21 perpendicular to the plane of the drawing of FIG. 1, which is oriented parallel to the axis of rotation 5 of the round brush 6.Furthermore, the apparatus 1 has at least one manually actuatable adjusting device 21, with which an arrangement height of the scanning wheels 20 relative to an arrangement height of the round brush 6 can be adjusted. The adjusting device 21 has an adjusting unit 22 arranged at an inclination and configured to be telescopic. The adjusting unit 22 has an upper tube element 23 which is designed as a rectangular hollow profile and extends through the holding element 16 and is connected thereto, preferably in a materially bonded manner. In addition, the adjusting unit 22 has a lower tube element 24 which is designed as a square profile and is guided in the upper tube element 23 so as to be longitudinally displaceable. Furthermore, the adjusting device 21 has an adjusting screw 25 running axially through the adjusting unit 22 and indicated by dashed lines, and a crank handle 26 for actuating the adjusting screw 25, wherein the adjusting screw 25 is screwed into the lower tubular element 24, so that a rotation of the adjusting screw 25 about its longitudinal central axis causes an axial displacement of the lower tubular element 24 relative to the upper tubular element 23.At a lower end of the lower pipe element 24, a cross member 27 designed as a square profile is arranged, which runs perpendicular to the plane of the drawing of FIG. 1. The two scanning wheels 20 are arranged indirectly on the cross member 27 via a respective wheel fork 28, wherein the respective wheel fork 28 is mounted on the cross member 27 in a form-fitting manner with an upper fork section and is locked on the cross member 27 by means of a clamping screw 29. The upper fork section of the respective wheel fork 28, the cross member 27 and the clamping screw 20 form an adjustment device 30 with which an axial distance between the two scanning wheels 20 can be adjusted.The tensile force generated by the tension spring 19 is less than the weight force acting on the height-movable assembly of the device 1 connected to the guide links 13 and 14, which assembly comprises, among other things, the scanning wheels 20, the round brush 6, the protective cover 10, the holding section 15, the adjusting device 21, the wheel forks 28.FIG. 2 shows a schematic rear view of the device 1 shown in FIG. 1, FIG. 2 shows in particular that the round brush 6 has three brush sections 7 and 31 with bristles, which are arranged axially spaced apart from one another, wherein the two outer brush sections 7 arranged axially on the outside are formed to be of equal length axially and the middle brush section 31 is formed to be shorter than the outer brush sections 7.In addition, FIG. 2 shows the transverse element 27 on which the two wheel forks 28 with the clamping screws 29 are arranged spaced apart from one another, on each of which a scanning wheel 20 is arranged.Furthermore, the drive unit 32 is shown, which is drivingly connected to a drive shaft 33 of the device 1 via a coupling 34 in the form of a star coupling. The shaft 8 of the round brush 6 is mounted on the drive shaft 33. The shaft 8 of the round brush 6 is secured to the drive shaft 33 by at least one grub screw, not shown, against rotation about its longitudinal axis. The grub screw can be used to readjust the distances between devices 1 arranged laterally spaced apart from one another in addition to the fact that these devices 1 can be adjusted along the holding structure 2.The drive shaft 33 is mounted on the fork 18 via pivot bearings, not shown, wherein the pivot bearings are detachably connected to the fork 18 via mechanical fastening means, not shown. Axial displacements of the drive shaft 33 are somewhat more variable due to the special coupling 34 and do not pass immediately through possible imbalance to seals, not shown, of the drive unit 32 and / or the rotary bearings.By releasing the two bearings from the fork 18, the drive shaft 33 with the round brush 6 arranged thereon can be removed from the fork 18 and, if required, exchanged for another or new assembly with corresponding components. For this purpose, recesses, not shown, which are designed as elongated holes and extend perpendicularly to the plane of the drawing of FIG. 2 and are open in the direction of the view of FIG. 2 can be formed on vertical legs 35 of the fork 18.List of reference characters1 Device 2 Working vehicle 3 Holding construction 4 Limb of 3 5 Axis of rotation 6 Round brush 7 Outer brush section 8 Shaft of 6 9 Component of 2 10 Protective cover 11 Coupling device 12 Parallelogram guide unit 13 Upper guide link 14 Lower guide link 15 Holding section of 11 16 Holding element 17 Limb of 16 18 Fork 19 Tension spring 20 Ratchet wheel 21 Adjusting device 22 Adjusting unit 23 Upper tubular element of 22 24 Lower tubular element of 22 25 Adjusting screw 26 Hand crank 27 Cross member 28 Wheel fork 29 Clamping screw 30 Adjusting device 31 Central brush section 32 Drive unit 33 Drive shaft 34 Coupling 35 Limb of 18 X Longitudinal axis of 2References included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedDE 1 962 961 A

[0002]

Claims

Device (1) for machine removal of weeds arranged laterally adjacent to a crop plant row, characterised by - at least one holding structure (3) which can be arranged at least indirectly on the front side or on the rear side or in an interaxle manner on a working vehicle (2), - at least one round brush (6) which can be driven about an axis of rotation (5) which can be aligned transversely to a longitudinal axis (X) of the working vehicle (2) and horizontally, - at least one coupling device (11) which connects the round brush (6) to the holding structure (3) in a height-adjustable manner, and - at least one scanning wheel (20) which is arranged in a fixed manner with respect to the round brush (6) and is connected indirectly to the round brush (6) and is arranged such that it can be rotated about an axis which is aligned parallel to the axis of rotation (5) of the round brush (6).Device (1) according to claim 1, characterised in that the coupling device (11) has at least one parallelogram guide unit (12).Device (1) according to claim 1 or 2, characterised byat least one tension spring (19) which is connected on the one hand at least indirectly to the holding structure (3) and on the other hand at least indirectly to the round brush (6), so that the round brush (6) can be acted upon by a tensile force directed away from the ground.Device (1) according to one of Claims 1 to 3, characterized byat least one actuatable adjusting device (21), with which an arrangement height of the scanning wheel (20) relative to an arrangement height of the round brush (6) can be adjusted.Device (1) according to claim 4, characterised in that the adjusting device (21) has at least one adjusting unit (22) arranged at an inclination and configured to be telescopic.Device (1) according to one of Claims 1 to 5, characterized in that the round brush (6) has at least two brush sections (7, 31) with bristles which are arranged axially spaced apart from one another.Device (1) according to claim 6, characterised in that the round brush (6) has three brush sections (7, 31) with bristles, which are arranged axially spaced apart from one another, wherein the two outer brush sections (7) arranged axially on the outside are of equal length and the middle brush section (31) is shorter than the outer brush sections (7).Device (1) according to one of Claims 1 to 7, characterized byat least one protective cover (10) arranged at least partially above the round brush (6) and at a radial distance from the round brush (6).Device (1) according to one of Claims 1 to 8, characterized byat least one drive unit for driving the round brush (6).Device (1) according to claim 9, characterised in that the drive unit (32) is configured to drive the round brush (6) at a rotational speed in a range from 2,000 U / min to 4,000 U / min.Device (1) according to one of Claims 1 to 10, characterized bytwo scanning wheels (20) which are arranged in a fixed position with respect to the round brush (6) and are connected indirectly to the round brush (6) and are arranged such that they can be rotated about a common axis which is aligned parallel to the axis of rotation (5) of the round brush (6).Device (1) according to claim 11, characterised byat least one adjusting device (30), with which an axial distance between the two scanning wheels (20) can be adjusted.Device (1) according to one of Claims 1 to 12, characterized in that the retaining structure (3) can be fastened to a displacement frame of the working vehicle (2).A working vehicle (2), in particular a tractor, characterised byat least one device (1) according to one of claims 1 to 13.

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