Soil-working tool and method for producing same

Abstract

The invention relates to a soil-working tool (1) for working soil material in a working direction (AR), wherein the soil-working tool (1) has a tip (2), wherein at least one working edge (3) is oriented at a working angle (4) to the working direction (AR) and runs towards the tip (2), wherein the soil-working tool (1) has a main body (10), wherein a first hard-material element (20) is provided in the region of the tip (2) and a second hard-material element (50) is provided in the region of the working edge (3), and wherein a butt joint (70) is formed between a side surface (52) of the second hard-material element (50) and a side surface (22) of the first hard-material element (20). Increased wear resistance is achieved in that a front end (71), with respect to the working direction (AR) and located in the region of the working edge (3), of the butt joint (70), as viewed along a longitudinal centre line (72) of the butt joint (70), is covered by the first hard-material element (20) and / or the second hard-material element (50). The invention also relates to a method for producing at least two soil-working tools.

Description

[0001] Soil cultivation tool and method for manufacturing

[0002] The invention relates to a soil tillage tool, in particular a share (goosefoot, hoe or wing share), for tilling soil material in a working direction, wherein the soil tillage tool has a tip in a front region in the working direction, wherein at least one working edge is provided which is aligned at a working angle to the working direction and runs towards the tip, wherein the soil tillage tool has a base body, wherein a first hard material element is provided on the base body in the region of the tip, wherein a second hard material element is provided on the base body in the region of the working edge, and wherein a butt joint is formed between a side surface of the second hard material element and a side surface of the first hard material element.

[0003] A soil tillage tool according to the invention can, in particular, be a duckfoot or winged share, the base body of which has two wings extending laterally and rearwardly from the tip. In this case, the working edges can be formed on the wings. The working angle can correspond to half the tip angle of a duckfoot or winged share, which is formed between the working edges formed on the wings.

[0004] A soil cultivation tool in the form of a cultivator tip is known from EP 3 289 845 B1. The cultivator tip is arrow-shaped and has a cutter holder, to which two extension arms are attached at the sides. In the area of ​​a front tip in the feed direction, the cutter holder is equipped with a cutting element. Adjacent to the cutting element, the extension arms are provided with hard material covers. A butt joint formed between the cutting element and an adjacent hard material cover is aligned essentially parallel to the feed direction.

[0005] A winged blade tip is known from DE 10 2019 106 393 A1. The winged blade tip has a V-shaped base body with a central region and two adjoining wings that converge to form a tip. A hard material plate tip is provided in the tip region. Hard material plates are arranged in the region of cutting edges formed at the leading edges of the wings. A butt joint is formed between the hard material plate tip and an adjacent hard material plate, which is oriented essentially perpendicular to the cutting edge and thus at an angle to a machining direction.

[0006] EP 3 959 953 A1 discloses a soil cultivation tool in the form of a cultivator share. The cultivator share is arrow-shaped. A hard metal tip is provided in the area of ​​the share's tip. The edges on the front side are coated with hard metal plates. A butt joint is formed between the hard metal tip and an adjacent hard metal plate, which is oriented at an angle to a soil cultivation direction.

[0007] The object of the invention is to provide a soil cultivation tool of the type mentioned above which is characterized by increased wear resistance.

[0008] A further object of the invention is to provide a method for producing at least two soil cultivation tools, which is characterized by a reduced cost of parts.

[0009] The problem concerning the soil tillage tool is solved in that a front end of the butt joint, which is arranged in the region of the working edge and is at the front with respect to the working direction, viewed along a central longitudinal line of the butt joint, is covered by the first hard material element and / or the second hard material element. The central longitudinal line of the butt joint is understood in particular to be a line which, along the course of the joint, has the same distance from the lateral surface of the first hard material element and the lateral surface of the second hard material element perpendicular to its course. The central longitudinal line of the butt joint can run centrally with respect to the joint height of the butt joint. The joint height can correspond to a height measured between an underside facing the base body and an upper side of the first and / or second hard material element facing away from the base body. The central longitudinal line thus follows the joint course of the butt joint.It can be straight or curved.

[0010] The front end of the butt joint, which is arranged in the area of ​​the working edge, can be opposite a rear end of the butt joint, which is remote from the working edge, with respect to the working direction.

[0011] A working direction is understood in particular to be a direction in which the soil tillage tool is guided through the soil to be tilled during soil tillage.

[0012] The first and / or second hard material element is / are preferably made of a hard material that is more wear-resistant to abrasive attack by the soil material being worked than the material of the base body of the soil working tool. In particular, the first and / or second hard material element can comprise a cemented carbide and / or a ceramic material, preferably consisting of a cemented carbide and / or a ceramic material. A cemented carbide is understood to mean, in particular, a metal matrix composite material. In this case, particles of hard materials such as carbides, nitrides and / or oxides are held in a metallic matrix. A hard material element can preferably comprise a cemented carbide, in particular consisting of one that contains tungsten carbide particles.

[0013] The hard material elements can protect the base body from excessive wear. However, leaching of the base body material can occur, particularly in the area of ​​the butt joint, if machined soil material gets into the butt joint and has an abrasive effect on the base body. Furthermore, it can be provided that solder material and / or adhesive is present in the area of ​​the butt joint, by means of which the hard material elements are fixed to the base body and / or to one another. The solder material or adhesive is also less wear-resistant than the soil material than the material of the hard material elements. This can also lead to leaching of the solder material or adhesive in the area of ​​the butt joint. This can weaken the connection between the hard material elements and the base body, which can possibly lead to breakage or loss of hard material elements.

[0014] The inventors have recognized that significantly improved protection against premature wear of the soil tillage tool, particularly in the area of ​​the butt joint, is achieved when the front end of the butt joint, viewed along the centerline of the butt joint, is covered. This effectively prevents soil material to be tilled from entering the butt joint near the front end and from there being conveyed along the butt joint.

[0015] Particularly effective protection against wear can be achieved if the front end of the butt joint is covered over the entire height of the butt joint.

[0016] The first and / or second hard material element can each have a central transverse plane. The central transverse plane of a hard material element can be a plane arranged between an upper side of a hard material element and a lower side oriented towards the base body. The lower side of a hard material element can have a bearing surface which is at least partially, indirectly or directly supported on a receiving surface of the base body. The central transverse plane can, in particular, notionally divide the hard material element into an upper and a lower mass and / or volume half. According to one variant of the invention, it can be provided that, viewed in projection onto a central transverse plane of the second hard material element, the second hard material element tapers at an acute angle in the region of a front corner with respect to the working direction.This results in an advantageous geometry that enables a compact design of the soil tillage tool in the tip area.

[0017] If it is further provided that the front corner is at least partially covered by the covering of the front end of the butt joint, the front corner is protected from attack by the soil material to be processed. In this context, the covering is understood to mean, in particular, a covering along the central longitudinal line of the butt joint. The covering significantly reduces the risk of breakage caused by impact loads, for example, by stones contained in the soil to be processed. The covering can be provided, in particular, by the first hard material element.

[0018] A compact design of the first and / or second hard material element can be achieved if the first hard material element and / or the second hard material element has / have a shoulder in the region of the front end of the butt joint. Preferably, the front end of the butt joint is at least partially covered by the shoulder.

[0019] If it is further provided that the attachment is provided in a front half of a longitudinal extension of the first hard material element measured in the working direction, this results in a stable construction of the soil tilling tool. In this way, a large part of the longitudinal extension of the first hard material element is located in a region behind the front end of the butt joint and the working edge. Thus, the first hard material element can be supported on the base body over a large part of its longitudinal extension, whereby the stability of the soil tilling tool can be increased. Preferably, the attachment can be provided within the front 40% of the longitudinal extension of the first hard material element.Good protection against abrasive and / or impact damage from the soil material being machined can be achieved, in particular, by the shoulder projecting beyond the lateral surface of the first hard material element in the direction of a transverse extension of the first hard material element measured transversely to the working direction and parallel to a central transverse plane of the first hard material element. In particular, it can further be provided that the transverse extension of the first hard material element has its maximum value in the region of the shoulder.

[0020] According to an advantageous development of the invention, it is proposed that a back surface facing opposite to the working direction be provided on the attachment, which back surface directly or indirectly adjoins the side surface. A receiving space can thus be at least partially delimited by the side surface of the first hard material element, the back surface, and the side surface of the second hard material element. The receiving space can preferably serve to accommodate a material-to-material connecting means, in particular a solder and / or an adhesive, for connecting the first and / or second hard material elements to the base body and / or to one another. The receiving space can thus preferably form a soldering gap and / or an adhesive gap.

[0021] The back surface may preferably be at an angle to the side surface or to a tangent to the side surface lying in a central transverse plane of the first hard material element.

[0022] A preferred embodiment of the invention can be such that the lateral surface of the first hard material element in the region of the butt joint, viewed in projection onto the / a central transverse plane of the first hard material element, has a convex curvature at least in some regions. Such a convex curvature can increase the scope for selecting the working angle of the soil tillage tool. This embodiment can thus make it possible to use an identical first hard material element with different base bodies that have different working angles. The convex curvature prevents collisions between the corners of the first and second hard material elements, even with an increased or decreased working angle. With such a first hard material element, the component complexity can thus be reduced.

[0023] According to a further variant of the invention, it is conceivable that the lateral surface of the second hard material element in the region of the butt joint, viewed in projection onto the / a central transverse plane of the second hard material element, has a concave curvature at least in some regions. In particular, if, as previously described, the first hard material element has a convex curvature on its lateral surface, the lateral surfaces of the first and second hard material elements are then designed to correspond to one another at least in part. An undesirable locally reduced or increased width of the butt joint can be reduced in this way. Thus, on the one hand, abutment of the hard material elements against one another can be avoided, and on the other hand, abrasive attack on the material of the base body and / or a solder material or adhesive within the butt joint caused by an excessive joint width can be at least largely prevented.

[0024] If the side surface of the first hard material element has a convex curvature at least in some areas and the side surface of the second hard material element has a concave curvature at least in some areas, there is also a further improvement in the scope for selecting the working angle.

[0025] An advantageous variant of the invention is such that, viewed in projection onto the / a central transverse plane of the first hard material element, a radius of curvature of the side surface of the first hard material element, and / or, viewed in projection onto the / a central transverse plane of the second hard material element, a radius of curvature of the side surface of the second hard material element is on average at least 75% of a joint length of the butt joint measured along the central longitudinal line of the butt joint, preferably on average at least corresponds to the joint length.

[0026] The joint length is preferably measured between the front end of the butt joint with respect to the working direction and the rear end of the butt joint with respect to the working direction. For example, the joint length can be measured between a first point on the side surface of the first or second hard material element in the direction of the central longitudinal line, which is opposite a point on the side surface of the second or first hard material element transversely to the central longitudinal line, and a last point on the side surface of the first or second hard material element in the direction of the central longitudinal line, which is opposite a point on the side surface of the second or first hard material element transversely to the central longitudinal line.

[0027] A curvature of the side surface can increase the flexibility in selecting the working angle. This design makes it possible to use the same first and / or second hard material element with base bodies that have different working angles. The curvature can prevent collisions between the corners of the first and second hard material elements, even with an increased or decreased working angle. This can reduce the number of parts required.

[0028] With the proposed ratio between the radius of curvature and the joint length, a large radius of curvature relative to the joint length can be provided on the side surface of the first and / or second hard material element. The large radius of curvature results in a relatively slight curvature of the side surface. Such a slight curvature offers the advantage that the first and / or second hard material element can be designed compactly, while at the same time maintaining the variability with regard to the working angle. Furthermore, such a slight curvature can simplify the production of the base body. For example, a receiving surface of the base body on which a hard material element rests at least in part does not have to be precisely adapted to the curved contour of the hard material element.Rather, the slightly curved contour can be approximated by a straight line, so that a receiving surface with straight contours can be manufactured, which, for example, significantly simplifies milling of the base body to produce the support surfaces.

[0029] A preferred embodiment of the invention can be characterized in that the first hard material element has on its underside a support surface directed towards the base body for at least partial support on a first receiving surface of the base body. The support can be direct or indirect. In particular, it can be provided that a solder and / or an adhesive is arranged at least in some regions between the hard material element and the base body. If it is further provided that adjacent to the support surface, in a front region with respect to the working direction, a thickened portion is provided which protrudes beyond the support surface, and that the / a shoulder is provided in the region of the thickened portion and / or the transition between the support surface and the thickened portion, the shoulder is arranged in a stable region of the first hard material element.This results in an approach that can withstand even shock loads and reliably covers the front end of the butt joint.

[0030] In particular, it may be provided that a guide surface is provided at an angle to the support surface in the transition between the support surface and the thickened portion. The guide surface may be supported on a counter-guide surface of the base body.

[0031] A further variant of the invention can be such that the first hard material element has on its underside a support surface directed towards the base body for at least partial support on a first receiving surface of the base body, that adjacent to the support surface, in a front area with respect to the working direction, a thickened portion is provided which protrudes beyond the support surface, wherein in the transition between the support surface and the thickened portion, a guide surface is provided which is at an angle to the support surface, and wherein the guide surface is supported on a counter-guide surface of the base body. This results in particularly good support of the first hard material element counter to the working direction. Preferably, the guide surface has a surface normal which has at least one component which is oriented counter to the working direction.Furthermore, the counter-guide surface preferably has a surface normal that has at least one component oriented in the working direction. It is particularly conceivable for the projection to be arranged in the transition region between the support surface and the guide surface. A projection arranged in this stably supported region can be particularly mechanically robust.

[0032] A soil tillage tool with excellent cutting performance can be provided, in particular, if the first hard material element has a cutting region in a front region thereof in the working direction. The risk of breakage of the cutting region can be reduced if the cutting region has a convexly curved curvature section when viewed in projection onto the / a central transverse plane of the first hard material element. Furthermore, it can be provided that a side section of the cutting region adjoins the curvature section, opposite to the working direction, which is oriented at an angle to the working direction. In this case, it can preferably be provided that the side section, viewed in projection onto the central transverse plane of the first hard material element, is rectilinear.

[0033] According to an advantageous development of the invention, it can further be provided that, viewed opposite the working direction, a transverse extension of the first hard material element measured transversely to the working direction is increased by the course of the curved section and the side section, that the side section, viewed opposite the working direction, ends in the shoulder(s), and that the side surface of the first hard material element directly or indirectly adjoins the shoulder, following opposite the working direction. In this way, a high-cutting, break-resistant, and compact first hard material element is provided.

[0034] A soil tillage tool according to the invention can also be characterized in that the base body has a first receiving surface in the region of the tip, in that the first hard material element has a support surface on its underside directed towards the first receiving surface, in that the first hard material element is supported with its support surface on the first receiving surface at least partially, preferably completely, and in that the support surface of the first hard material element and / or the first receiving surface is / are at least predominantly flat. A predominantly flat surface can be a surface that is flat. A flat surface that has spatially limited elements that deviate from the flat design, such as bores or projections, can also be understood as a predominantly flat surface.

[0035] Within the scope of the invention, it can also be provided that the base body has a second receiving surface in the region of the working edge, that the second hard material element has a support surface directed towards the second receiving surface on its underside, that the second hard material element is supported with its support surface on the second receiving surface at least in regions, preferably completely, and that the support surface of the second hard material element and / or the second receiving surface is / are at least predominantly flat.

[0036] A variant of a soil tillage tool according to the invention can also be characterized in that the first receiving surface and the second receiving surface are at an angle to one another, that the first receiving surface and the second receiving surface merge into one another in a joint, and that the joint is linear and / or has a profile which is different from a profile, in particular a curvature, of the side surface of the first and / or the second hard material element.

[0037] According to a further development of the invention, it is proposed that the first hard material element has, in a rear region with respect to the working direction, preferably in the region of a rear edge with respect to the working direction, a centering projection that projects beyond the / a support surface of the first hard material element in the direction of the base body, and that the / a first support surface of the base body, on which the first hard material element is applied with its support surface, has an at least partially corresponding centering receptacle. In this way, the first hard material element can be reliably positioned before being fastened to the base body, in particular before producing a soldered and / or adhesive connection, through the interaction of the centering projection with the centering receptacle.

[0038] The object relating to the method is achieved by a method for producing at least two soil cultivation tools, which comprises the following steps for a first soil cultivation tool and a second soil cultivation tool:

[0039] - Providing at least one basic body;

[0040] - Applying the first hard material element to the / a first receiving surface provided on the base body;

[0041] - Applying the second hard material element to the / a second receiving surface provided on the base body;

[0042] - Connection of the first and second hard material elements to the base body, in particular a material-to-material connection, preferably a soldered connection and / or an adhesive connection.

[0043] It is further provided that a first base body of the first soil tillage tool, which has a first working angle between the working edge and the working direction, is equipped with first and second hard material elements of a first geometric configuration, and that a second base body of the second soil tillage tool, which has a second working angle between the working edge and the working direction that differs from the first working angle, is equipped with first and second hard material elements of the same geometric configuration, namely the first geometric configuration. Thus, identical parts can be used, which can reduce the parts requirement.

[0044] The object relating to the method is also achieved by a method for producing at least two soil tillage tools, which method comprises the aforementioned steps for a first soil tillage tool and a second soil tillage tool, wherein it is further provided that a first base body of the first soil tillage tool, which has a first bending angle, is equipped with first and second hard material elements of a first geometric configuration, and that a second base body of the second soil tillage tool, which has a second bending angle different from the first bending angle, is equipped with first and second hard material elements of the same geometric configuration, namely the first geometric configuration. A bending angle can be an angle formed between projections of opposite working edges onto a surface that is perpendicular to the working direction.In particular, the opposing working edges can be formed on opposite wings of a wing or duckfoot blade. A bending angle can also be an angle formed between projections of the upper and / or lower sides of the base body, which are arranged in the region of opposite wings, onto a surface perpendicular to the working direction.

[0045] The object relating to the method is further achieved by a method for producing at least two soil tillage tools, which method comprises the aforementioned steps for a first soil tillage tool and a second soil tillage tool, wherein it is further provided that a first base body of the first soil tillage tool, which has a first angle of attack, is equipped with first and second hard material elements of a first geometric design, and that a second base body of the second soil tillage tool, which has a second angle of attack deviating from the first angle of attack, is equipped with first and second hard material elements of the same geometric design, namely the first geometric design. An angle of attack can in particular be an angle which a receiving surface for a first orsecond hard material element in a section perpendicular to the alignment of the working edge with an upper side and / or lower side of the base body in an adjacent area outside the receiving surface.

[0046] The invention is explained in more detail below with reference to exemplary embodiments shown in the figures.

[0047] Figure 1 : schematic perspective view of a

[0048] Soil cultivation tool,

[0049] Figure 2: schematic top view of the tip of the

[0050] Soil cultivation tool, Figure 3: in a partially cut-off schematic front view the

[0051] Soil cultivation tool,

[0052] Figure 4: in schematic perspective view a first hard material element,

[0053] Figure 5: a schematic side view of the first hard material element,

[0054] Figure 6: a schematic plan view of the first hard material element,

[0055] Figure 7: another schematic perspective view of the first

[0056] hard material element,

[0057] Figure 8: a schematic perspective view of a second

[0058] hard material element,

[0059] Figure 9: a schematic plan view of the second hard material element,

[0060] Figure 10: another schematic perspective view of the second hard material element,

[0061] Figure 11 : a schematic perspective view of a base body of the soil cultivation tool,

[0062] Figure 12: a schematic plan view of the tip of a first

[0063] Soil cultivation tool with a first working angle,

[0064] Figure 13: a schematic plan view of the tip of a second

[0065] Soil cultivation tool with a second working angle,

[0066] Figure 14: a schematic rear view of a wing of the soil tillage tool from the perspective marked XIV in Figure 1.

[0067] Figure 1 shows a schematic perspective view of an embodiment of a soil tillage tool 1. As can be seen from the illustration, the soil tillage tool 1 can be a goosefoot share. The soil tillage tool 1 can be inserted into the soil to be tilled and guided through the soil along a working direction AR in order to till it.

[0068] As can be further seen from Figure 1, the soil tillage tool 1 has a tip 2 in a front region in the working direction AR. Furthermore, the soil tillage tool 1 has at least one, in this case two, working edges 3, which run / run towards the tip 2. The working edges 3 run at a working angle 4 with respect to the working direction AR. If the soil tillage tool 1 is a duckfoot share, as shown here, or also a wing share, the working angle 4 can correspond to half a tip angle 6. The tip angle 6 can be an angle at which the working edges 3 are oriented to one another.

[0069] The duckfoot share shown in the figures has two wings 9 that extend from the tip 2 backward and laterally outward, opposite to the working direction AR. The working edges 3 can be formed on the wings 9.

[0070] As can be seen in Figure 1, the soil tillage tool 1 has a base body 10. A first hard material element 20 is provided on the base body 10 in the region of the tip 2. A second hard material element 50 is provided on the base body 10 in the region of the working edge 3. In particular, if the soil tillage tool 1 has two working edges 3 as shown, a second hard material element 50 can be provided on each of the two working edges 3. A butt joint 70 is formed between the first hard material element 20 and the second hard material element 50.

[0071] Furthermore, the soil tillage tool 1 can have at least one third hard material element 80 in the region of the working edge(s) 3. A third hard material element can adjoin the second hard material element 50 along the working edge 3, viewed from the tip 2. In the exemplary embodiment shown, both working edges 3 are partially covered with third hard material elements 80. A further butt joint 75 can be formed between the second hard material element 50 and a third hard material element 80, as well as between a third hard material element 80 and another third hard material element 80.

[0072] The first, second, and / or third hard material elements 20, 50, 80 can preferably be made of a hard material that is more wear-resistant to abrasive attack by the soil material being worked than the material of the base body 10 of the soil working tool 1. In particular, the first, second, and / or third hard material elements 20, 50, 80 can comprise a hard metal and / or a ceramic material, preferably consisting of a hard metal and / or a ceramic material. In particular, the hard metal can be a metal matrix composite material. The hard metal can preferably comprise tungsten carbide.

[0073] Figure 11 shows the base body 10 in more detail in a perspective view. The base body 10 can consist of or be manufactured from, for example, a bent sheet metal part, a forged part, or a cast part. Preferably, the base body 10 is made of a tough material so that it is insensitive to impact loads.

[0074] A fastening projection 16 can be provided on the base body. The fastening projection 16 can preferably be provided in a rear region of the base body 10 with respect to the working direction AR. As shown, the fastening projection 16 can be formed integrally on the base body 10. However, it is also conceivable for the fastening projection 16 to be fastened to the base body 10 in another way, for example by screwing it. The fastening projection 16 can serve to secure the soil cultivation tool 1 to an agricultural device and / or machine. For this purpose, fastening means can be provided in the region of the fastening projection 16. As in the present case, for example, a fastening receptacle 17 can be provided on the fastening projection 16.

[0075] As can be seen from Figures 11 and 3, the base body 10, particularly when the soil tillage tool 1 is designed as a duckfoot or wing share, can have a bending angle 7. Accordingly, the wings 9 of the soil tillage tool 1 or the regions of the base body 10 assigned to the wings 9 can be angled relative to one another about a bending axis 7.1. The bending axis 7.1 preferably lies in a central longitudinal plane of the soil tillage tool 1, which is preferably aligned parallel to the working direction AR. In a front view of the tip 2, as can be seen in Figure 3, the bending angle 7 can correspond to an angle that the working edges 3 assume relative to one another in this view. The bending angle 7 can also correspond to an angle that the upper sides and / or lower sides of the base body 10, which are arranged on opposite wings, assume relative to one another in this view.

[0076] In the region of the tip 2, a first receiving surface 11 can be provided on the base body 10, which can serve to at least partially support the first hard material element 20. The first receiving surface 11 is preferably offset from an upwardly directed surface 19 of the base body 10. It is preferably set back from the surface 19. The first receiving surface 11 can be formed integrally with the base body 10 during manufacture, in particular by a primary or forming process. However, the first receiving surface 11 is preferably formed on the base body 10 by a machining process, in particular by a milling process.

[0077] As clearly shown in Figure 11, the first receiving surface 11 can be flat. A flat first receiving surface 11 can be manufactured with minimal manufacturing effort.

[0078] In the region of an end facing away from the working direction AR, a first contact surface 11.1 can be formed on the first receiving surface 11. Preferably, the first contact surface 11.1 is at an angle to the first receiving surface 11. The first contact surface 11.1 can result as a step, which is caused by the offset of the first receiving surface 11 to the surface 19 of the base body 10. The first contact surface 11.1 can support the first hard material element 20, in particular in a direction opposite to the working direction AR. Preferably, a rear side 49 of the first hard material element 20 can be supported at least partially, directly or indirectly, on the first contact surface 11.1.

[0079] A centering receptacle 14 can also be provided in the region of the first receiving surface 11. The centering receptacle 14 can be formed as a bore in the first receiving surface 11. Preferably, the centering receptacle 14 is provided in a rear region of the first receiving surface 11 with respect to the working direction AR.

[0080] In the working direction AR, a counter-guide surface 13 can adjoin the first receiving surface 11, which preferably adjoins the first receiving surface 11 at an angle. The counter-guide surface 13 can have a surface normal that has at least one component in the working direction AR. A guide surface 39 of the first hard material element 20 can be directly or indirectly supported on the counter-guide surface 13, which guide surface can be configured to correspond at least partially to the counter-guide surface 13.

[0081] As can be further seen from Figure 11, a second receiving surface 12 can be provided along the working edge 3 next to the first receiving surface 11. The second receiving surface 12 can serve to at least partially directly or indirectly support the second hard material element 50. The second receiving surface 12 can also be set back from the surface 19. The second receiving surface 12 can also be produced on the base body 10 by primary forming or, preferably, by machining. Preferably, the second receiving surface 12 is also flat. Preferably, an angled second contact surface 12.1 can adjoin in a region of the second receiving surface 12 facing away from the working edge 3. The second contact surface 12.1 can result as a step from the setback of the second receiving surface 12 relative to the surface 19 of the base body 10. On the second contact surface 12.1, the second hard material element 50, in particular with a rear side 62, can be supported at least partially opposite to the working direction AR and / or a direction away from the working edge 3.

[0082] A third receiving surface 18 for one or more third hard material elements 80 can adjoin the second receiving surface 12 along the working edge 3. As can be seen from Figure 11, the third receiving surface 18 can be configured essentially in accordance with the second receiving surface 12, so that reference can be made to the above explanations. Preferably, the second receiving surface 12 can merge directly into the third receiving surface 18. In this way, the second receiving surface 12 and the third receiving surface 18 can be machined in a single operation, in particular within a common milling process.

[0083] As can be further seen from Figure 11, a joint 15 can be formed between the first receiving surface 11 and the second receiving surface 12. If both the first receiving surface 11 and the second receiving surface 12 are flat, the joint 15 can result in a straight line.

[0084] A preferred embodiment of the first hard material element 20 can be seen more clearly in Figures 4 to 7.

[0085] The first hard material element 20 can have an upper side 23 and a lower side 24. The upper side 23 can form a discharge surface, via which soil material is at least partially discharged counter to the working direction AR during machining. The lower side 24 can be directed towards the base body 10. In particular, a support surface 24.1 can be defined on the lower side 24, which is directly or indirectly supported on the first receiving surface 11 of the base body 10. Indirect support can be provided, for example, if a solder material and / or an adhesive is provided between the first hard material element 20, in particular the support surface 24.1 of the first hard material element 20, and the base body 10.

[0086] The support surface 24.1 can, as shown here, preferably be flat. In the area of ​​the support surface 24.1, a centering projection 43 can be provided, which projects beyond the support surface 24.1 in the direction of the base body 10. The centering projection 43 can be intended to be received in the centering receptacle 14 of the base body 10 (see Figure 11). For example, the first hard material element 20 can be reliably positioned before being attached to the base body 10, in particular before producing a soldered and / or adhesive connection, through the interaction of the centering projection 43 with the centering receptacle 14. As can be seen in particular from Figures 4 and 6, the first hard material element 20 can have a cutting area 31 in a front area 25 with respect to the working direction AR.The cutting region 31 can serve to cut and / or displace soil material located in front of the first hard material element 20 in the working direction AR. Preferably, the cutting region 31 can have a curved section 32, which has a convex curvature when projected onto a central transverse plane 46 of the first hard material element 20.

[0087] The central transverse plane 46 of the first hard material element 20 can be a plane located between an upper side 23 of the first hard material element 20 and the lower side 24. The central transverse plane 46 can, in particular, conceptually divide the first hard material element 20 into an upper and a lower mass and / or volume half.

[0088] A side section 33 of the cutting area 31 can adjoin the curved section 32, viewed opposite to the working direction AR. Preferably, the side section 33 is straight when projected onto the central transverse plane 46. The side section 33 can, in particular, be at an angle to the working direction AR when projected onto the central transverse plane 46.

[0089] The cutting area 31 is preferably formed by a front side 34 of the first hard material element 20 and / or a transition, in particular an edge, between the front side 34 and the top side 23 of the first hard material element 20. The edge can preferably have one or more transition sections, in particular chamfers and / or rounded portions. This can reduce the risk of material breakout at the cutting area 31.

[0090] As can further be seen from Figure 4, the upper side 23 of the first hard material element 20 can have a rear section 23.2 with respect to the working direction AR and a front section 23.1 with respect to the working direction AR. Preferably, the front section 23.1 is arranged in the front region 25, and the rear section 23.2 in the rear region 26 of the first hard material element 20. The front section 23.1 is preferably angled relative to the rear section 23.2 in a section through the first hard material element 20 in a central longitudinal plane 47 of the first hard material element 20.

[0091] The central longitudinal plane 47 is preferably aligned parallel to the working direction AR and penetrates the upper side 23 and the lower side 24 of the first hard material element 20. In particular, the central longitudinal plane 47 can conceptually divide the first hard material element 20 into a left and a right mass and / or volume half with respect to the working direction AR.

[0092] The first hard material element 20 can have at least one side surface 22. Preferably, the first hard material element 20, as shown here, has two side surfaces 22. The side surfaces 22 can be opposite one another with respect to the central longitudinal plane 47 and, in particular, can be configured symmetrically with respect to the latter. The top side 23 and the bottom side 24 can be connected in some areas by means of the side surfaces 22.

[0093] As is particularly evident in Figure 6, the side surface 22 can have a convex curvature 29 when viewed in projection onto the central transverse plane 46. Thus, a bulbous shape of the first hard material element 20 can result in the region of the side surface 22 in the plan view of the upper side 23 and / or in projection onto the central transverse plane 46.

[0094] Preferably, the curvature 29 has a comparatively large radius of curvature 30. As shown here, the curvature 29 can have a radius of curvature 30 that is on average at least 75%, preferably at least 100%, of a joint length 74 of the butt joint 70 measured along a central longitudinal line 72 of the butt joint 70. The butt joint 70 will be discussed in more detail later.

[0095] As can be seen particularly in Figure 5, the first hard material element 20 can have a thickened portion 37 in its front region 25. Preferably, the thickened portion 37 increases a thickness measured between the top side 23 and the bottom side 24 of the first hard material element 20 in some areas. In particular, the thickened portion 37 can be such that, viewed in the working direction AR, a lower deflection surface 24.2 adjoins the support surface 24.1 of the first hard material element 20, which is offset relative to the support surface 24.1 in the direction of its surface normal.

[0096] The lower deflection surface 24.2 can be oriented at an angle to the upper side 23, in particular to the front section 23.1 of the upper side 23, preferably such that, viewed in section along the central longitudinal plane 47 of the first hard material element 20, a wedge-shaped taper of the front region 25 of the first hard material element 20 toward the cutting region 31 results in the working direction AR. In this way, the first hard material element 20 can be designed for high cutting performance.

[0097] A transition 38 may be provided between the support surface 24.1 and the lower deflection surface 24.2. In particular, the transition 38 may be formed by a guide surface 39 positioned at an angle to the support surface 24.1 and the lower deflection surface 24.2.

[0098] The guide surface 39 is preferably aligned with the counter-guide surface 13 provided on the base body 10. The guide surface 39 can be supported directly or indirectly on the counter-guide surface 13. Thus, the first hard material element 20 can be additionally supported on the base body 10 in the direction opposite to the working direction AR.

[0099] As is clear from Figures 4 to 7, the first hard material element 20 can have a projection 21. Preferably, as shown here, two projections 21 can be provided, which are opposite one another with respect to the central longitudinal plane 47 of the first hard material element 20 and are particularly preferably formed symmetrically with respect to the same.

[0100] The projection 21 can protrude beyond the side surface 22 in a direction transverse to the working direction AR and parallel to the central transverse plane 46 of the first hard material element 20. Preferably, a transverse extension 28 of the first hard material element 20 can have a maximum value in the region of the projections 21. The transverse extension 28 can be dimensioned transverse to the working direction AR and parallel to the central transverse plane 46 of the first hard material element 20.

[0101] Preferably, the projection 21 is provided in a front half of a longitudinal extension 27 of the first hard material element 20 measured in the working direction AR, with respect to the working direction AR, particularly preferably within the front 40% of the longitudinal extension 27, as shown here.

[0102] The projection 21 can, viewed opposite to the working direction AR, adjoin the cutting area 31, in particular to the curved section 32 or, particularly preferably according to the present embodiment, to the side section 33.

[0103] Advantageously, the projection 21 can be provided in the area of ​​the thickened portion 37. This results, on the one hand, in the projection 21 being provided in a region of the first hard material element 20 that is particularly stable and well supported. Furthermore, this can ensure that the projection 21 has a sufficient height to cover, for example, a joint height 73 of the butt joint 70 between the first hard material element 20 and the second hard material element 50.

[0104] A back surface 45 can be provided in the region of the projection 21. The back surface 45 can, in particular, have a surface normal that has at least one component opposite to the working direction AR. The back surface 45 can directly or indirectly adjoin the side surface 22 of the first hard material element 20.

[0105] An embodiment of the second hard material element 50 can be seen in more detail in Figures 8 to 10. The second hard material element 50 can have a bottom side 54 oriented toward the base body 10. In particular, a support surface 55 can be formed on the bottom side 54, by means of which the second hard material element 50 can be supported directly or indirectly on the base body 10, in particular on the second receiving surface 12. Indirect support can be provided, for example, if a solder material and / or an adhesive is provided between the second hard material element 50, in particular the support surface 55 of the second hard material element 50, and the base body 10.

[0106] Preferably, the support surface 55 can be flat.

[0107] Opposite the underside 54, the second hard material element 50 can have an upper side 53. The upper side 53 can form a discharge surface for the processed soil material. Preferably, the upper side 53 can be formed parallel to the underside 54. However, it is also conceivable for an angle to be provided between the upper side 53 and the underside 54.

[0108] Between the upper side 53 and the lower side 54, the second hard material element 50 can have a central transverse plane 59. The central transverse plane 59 can, in particular, conceptually divide the second hard material element 50 into an upper and a lower mass and / or volume half.

[0109] The second hard material element 50 has a side surface 52 that is oriented toward the side surface 22 of the first hard material element 20 (see Figures 1 and 2). The side surface 52 can partially connect the top side 53 and the bottom side 54 of the second hard material element 50. Opposite the side surface 52, the second hard material element 50 can further have a remote side surface 64. The remote side surface 64 can be oriented toward a side surface of an adjacent third hard material element 80.

[0110] Furthermore, the second hard material element 50 can have a front side 63 oriented toward the working edge 3 and an opposite rear side 62. The rear side 62 can be supported at least partially, directly or indirectly, on the second contact surface 12.1 of the second receiving surface 12 of the base body 10. The front side 63 and / or a transition, in particular an edge, between the front side 63 and the upper side 53 can form a cutting edge 51. Transitions between sides 52, 53, 54, 62, 63, and / or 64 can preferably be rounded or chamfered to reduce the risk of edge breakage.

[0111] As can be seen in particular in Figure 9, the side surface 52, viewed in a plan view or in projection onto the central transverse plane 59, can have a concave curvature 57.

[0112] Preferably, the curvature 57 has a comparatively large radius of curvature 58. As shown here, the curvature 57 can have a radius of curvature 58 that is on average at least 75%, preferably at least 100%, of the joint length 74 of the butt joint 70. The butt joint 70 will be discussed in more detail later.

[0113] As further shown in Figures 8 to 10, the second hard material element 50, viewed in projection onto the central transverse plane 59, can taper at an acute angle to a front corner 61. The front corner 61 is preferably provided on the second hard material element 50 so as to protrude relative to the working direction AR (see Figure 2). Thus, the side surface 52, or a tangent to the side surface 52, viewed in projection onto the central transverse plane 59, can be oriented at an acute angle to the front side 63.

[0114] The third hard material element 80 can be plate-shaped. The third hard material element 80 preferably has a cutting edge 81 directed toward the working edge 3 on a front side 92 and / or a transition between its front side 92 and an upper side 83 facing away from the base body 10. Opposing side surfaces 82, which are oriented toward the facing side surface 64 of the second hard material element 50 and / or toward a side surface 82 of a further third hard material element 80 to form a further butt joint 75, can preferably be flat. Apart from this, the third hard material element 80 can be configured essentially similarly and supported and / or fastened to the base body 10 in a comparable manner to the second hard material element 50. In this respect, reference can be made to the above explanations regarding the second hard material element 50.

[0115] As already indicated, a butt joint 70 is formed between a side surface 22 of the first hard material element 20 and a side surface 52 of the second hard material element 50. The butt joint 70 can be seen particularly clearly in Figure 2.

[0116] A central longitudinal line 72 is defined for the butt joint 70. The central longitudinal line 72 follows the course of the butt joint 70. In particular, the central longitudinal line 72 can be a line that runs within the butt joint 70 and is equidistant from the side surface 22 of the first hard material element 20 and the side surface 52 of the second hard material element 50 along its course. Accordingly, the central longitudinal line 72 can run centrally between the side surface 22 of the first hard material element 20 and the side surface 52 of the second hard material element 50.

[0117] The central longitudinal line 72 can also run centrally with respect to a joint height 73 (see Figure 3) of the butt joint 70. The joint height 73 can be dimensioned as a height between a bottom side 54 facing the base body 10 and an opposite top side 53 of the second hard material element 50. The joint height 73 can also be dimensioned as a height between a bottom side 24 facing the base body 10, in particular a support surface 24.1 provided on the bottom side 24, and an opposite top side 23 of the first hard material element 20.

[0118] As can further be seen from Figure 2, the butt joint 70 has a front end 71 with respect to the working direction AR. The front end 71 is arranged in the region of the working edge 3. The front end 71 can thus be distinguished from an opposite rear end 76, which is not arranged in the region of the working edge 3, but rather faces away from the working edge 3 when viewed along the central longitudinal line 72. The front end 71 of the butt joint 70 can be a region in which, viewed along the central longitudinal line 72 and running towards the working edge 3, the last points of the side surface 22 of the first hard material element 20 and the side surface 52 of the second hard material element 50 are opposite one another transversely to the central longitudinal line 72.

[0119] Likewise, the rear end 76 of the butt joint 70 can be a region in which, viewed along the central longitudinal line 72 and running towards the working edge 3, first points of the side surface 22 of the first hard material element 20 and the side surface 52 of the second hard material element 50 are opposite each other transversely to the central longitudinal line 72.

[0120] A joint length 74 may be measured along the center longitudinal line 72 of the butt joint 70 from the rear end 76 to the front end 71.

[0121] As clearly shown in Figure 2, the front end 71 of the butt joint 70 is covered when viewed along the center longitudinal line 72. As shown here, the front end 71 of the butt joint 70 can be covered by the first hard material element 20. However, it is also conceivable that the front end 71 of the butt joint 70 is covered by the second hard material element 50.

[0122] By covering the front end 71 of the butt joint 70, as viewed along the central longitudinal line 72, the penetration of soil material into the butt joint 70 is made more difficult. This means that the area of ​​the butt joint 70 can be protected from abrasive attack by the soil material. It is particularly advantageous in this case that the coverage is not only provided in the working direction AR, as can already be achieved, for example, by orienting the butt joint 70 at an angle to the working direction AR. Rather, it is provided that the front end 71 of the butt joint 70 is covered, as viewed along the central longitudinal line 72. This makes it more difficult for soil material to enter the butt joint 70. This results in a labyrinth-like seal for the front end 71 of the butt joint.

[0123] The reduced ingress of abrasive soil material into the butt joint 70 can, in particular, protect the base body 10 from excessive wear. This makes it more difficult for soil material to penetrate the butt joint 70 and any subsequent contact of the soil material with a joint base, which may be formed by a receiving surface 11, 12, 18 of the base body 10. Furthermore, any solder material and / or an adhesive present in the butt joint, which may be provided for securing the hard material elements 20, 50 to the base body 10 and / or to one another, to be protected from the abrasive attack of the soil material. Thus, the service life of the soil working tool 1 can be increased by the overlap.

[0124] According to the exemplary embodiment illustrated in the figures, the overlap can be achieved by means of the projection 21. In the present case, two projections 21 are provided on the first hard material element 20, which overlap the front ends 71 ​​of butt joints 70 formed on both sides of the first hard material element 20.

[0125] Advantageously, the projection 21 also covers the front corner 61 of the second hard material element 50, thereby protecting it from the attacking ground material, in particular from impact loading by hard elements such as stones or the like that may be present in the ground.

[0126] As can be seen particularly in Figure 2, the back surface 45 of the projection 21 can be oriented toward the front end 71 of the butt joint 70. The back surface 45, the side surface 22 of the first hard material element 20, and the side surface 52 of the second hard material element 50 can at least partially define a receiving space 5. This receiving space 5 can preferably form a soldering gap and / or adhesive gap that accommodates solder material and / or an adhesive.

[0127] As already explained above, the side surfaces 22, 52 of the first and second hard material elements 20, 50 can have curvatures 29, 57. This can result in a curvilinear, preferably curved, profile of the butt joint 70, in particular of the central longitudinal line 72 of the butt joint 70, as can be seen in the figures. Such a curvilinear profile of the butt joint 70 can offer greater resistance to the flow of soil material along the butt joint 70 than a straight profile. In particular, the probability that the butt joint 70 is completely aligned along a preferred flow direction of the processed soil material over the soil processing tool 1 is almost zero due to a curvilinear profile.

[0128] If, as shown here and already indicated above, the extension 21 is provided in the front half of the longitudinal extension 27 of the first hard material element 20 measured in the working direction AR, preferably within the front 40% of the longitudinal extension 27, this results in a compact structure and particularly good support of the first hard material element 20. In particular, the region of the first hard material element 20 which lies to the rear of the extension 21 in the working direction AR can preferably be supported at least almost completely on the base body 10. The second hard material element 50 can be extended up to the vicinity of the extension 21 in the direction of the tip 2, so that at most a slight projection beyond the base body 10 in the working direction AR is required on the first hard material element 20.

[0129] As also previously discussed, the curvatures 29, 57 can have large radii of curvature 30, 58. One advantage of large radii of curvature 30, 58 is that machining of the first receiving surface 11 and the second receiving surface 12 can be simplified. Thus, despite the curvatures 29, 57 of the side surfaces 22, 52, a straight-line joint 15 (see Figure 11) can be provided between the first receiving surface 11 and the second receiving surface 12. The large radii of curvature 30, 58 result in only a slight geometric deviation of the support surfaces 24.1, 55 of the first and second hard material elements 20, 50 from the receiving surfaces 11, 12, so that despite simplified machining of the same, large-area support is achieved.

[0130] A further advantage of large radii of curvature 30, 58 is that this increases the design flexibility when selecting the working angle 4 or the tip angle 6 of the soil tillage tool 1. This advantage is particularly clear from Figures 12 and 13. Figure 12 shows a first soil tillage tool 1 which has a first working angle 4. In the area of ​​the tip there is a first hard material element 20 and, adjacent to this on both sides, a second hard material element 50. The advantageous design of the first and second hard material elements 20, 50, in particular the large radii of curvature 30, 58, makes it possible to use the first and second hard material elements 20, 50 unchanged with a second soil tillage tool 1' which has a different second working angle 4' than the first soil tillage tool 1.Such a second soil cultivation tool 1' is shown in Figure 13. Thus, in the manufacture of soil cultivation tools 1, first and second hard material elements 20, 50 can be used as identical parts if.

[0131] Soil cultivation tools 1, 1' are to be manufactured with different working angles 4, 4', in particular when different base bodies 10 are used.

[0132] In principle, these advantages can also be achieved to a lesser extent if one or both of the radii of curvature 30, 58 are infinitely large, i.e., if the side surfaces 22, 52 are not curved. However, the inventors have recognized that a finite radius of curvature, which in particular corresponds to at most twice the joint length 74, allows for greater variability in the selection of the working angle 4. Furthermore, the resulting curvature of the side surfaces 22, 52 results in a reduced risk of breakage for the first and second hard material elements 20, 50.

[0133] By designing the first and second hard material elements 20, 50 according to the invention, a method for producing at least two

[0134] Soil cultivation tools 1, 1', which for a first soil cultivation tool 1 and a second soil cultivation tool 1' each comprises a step of providing at least one base body 10, 10', a step of applying the first hard material element 20 to the first receiving surface 11 provided on the base body 10, 10', a step of applying the second hard material element 50 to the second receiving surface 12 provided on the base body 10, 10', and a step of connecting the first and second hard material elements 20, 50 to the base body 10, 10', in particular a material-to-material connection, preferably a soldered connection and / or adhesive connection.

[0135] It is further possible that a first base body 10 of the first soil tillage tool 1, which has a first working angle 4 between the working edge 3 and the working direction AR, is equipped with first and second hard material elements 20, 50 of a first geometric design, and that a second base body 10' of the second soil tillage tool 1', which has a second working angle 4' between the working edge 3 and the working direction AR that differs from the first working angle 4, is equipped with first and second hard material elements 20, 50 of the same geometric design, namely the first geometric design.

[0136] The inventors have further recognized that the inventive design of the first and second hard material elements 20, 50 also increases the design flexibility in the selection of an angle of attack 8 (see Figure 14) and the bending angle 7 of the soil tillage tool 1.

[0137] The angle of attack 8 can be an angle which the first, second and / or third receiving surface 11, 12, 18 and / or the upper side 23, 53, 83 of the first, second and / or third hard material element 20, 50, 80 assumes with respect to the base body 10, in particular with respect to the surface 19 of the base body, in a section along the central longitudinal plane 47 of the first hard material element 20 or perpendicular to the working edge 3.

[0138] The inventors have recognized that the advantages of the inventive design of the first and second hard material elements 20, 50 are also achieved, and in particular, when the side surfaces 22, 52 of the first and second hard material elements 20, 50 are not necessarily designed to correspond exactly.

[0139] By designing the first and second hard material elements 20, 50 according to the invention, a method for producing at least two soil tillage tools 1, 1' is thus also made possible, wherein a first base body 10 of the first soil tillage tool 1, which has a first bending angle 7, is equipped with first and second hard material elements 20, 50 of a first geometric design, and wherein a second base body 10' of the second soil tillage tool 1', which has a second bending angle 7 that differs from the first bending angle 7, is equipped with first and second hard material elements 20, 50 of the same geometric design, namely the first geometric design.

[0140] By designing the first and second hard material elements 20, 50 according to the invention, a method for producing at least two soil tillage tools 1, 1' is additionally or alternatively enabled, wherein a first base body 10 of the first soil tillage tool 1, which has a first angle of attack 8, is equipped with first and second hard material elements 20, 50 of a first geometric design, and wherein a second base body 10' of the second soil tillage tool 1', which has a second angle of attack 8 that differs from the first angle of attack 8, is equipped with first and second hard material elements 20, 50 of the same geometric design, namely the first geometric design.

Claims

Claims 1. Soil cultivation tool (1), in particular a share (goosefoot, hoe, or wing share), for cultivating soil material in a working direction (AR), wherein the soil cultivation tool (1) has a tip (2) in a front region in the working direction (AR), wherein at least one working edge (3) is provided, which is oriented at a working angle (4) to the working direction (AR) and extends towards the tip (2), wherein the soil cultivation tool (1) has a base body (10), wherein in the region of the tip (2) on the base body (10) a first hard material element (20) is provided, wherein in the region of the working edge (3) on the base body (10) a second hard material element (50) is provided, wherein between a side surface (52) of the second hard material element (50) and a side surface (22) of the first hard material element (20) a butt joint (70) is formed, characterized in that in the region of the working edge (3) arranged,with respect to the working direction (AR), the front end (71) of the butt joint (70), viewed along a central longitudinal line (72) of the butt joint (70), is covered by the first hard material element (20) and / or the second hard material element (50).

2. Soil cultivation tool according to claim 1, characterized in that the covering of the front end (71) of the butt joint (70) is provided over an entire joint height (73) of the butt joint (70).

3. Soil cultivation tool (1) according to claim 1 or 2, characterized in that that, viewed in projection onto a central transverse plane (59) of the second hard material element (50), the second hard material element (50) tapers at an acute angle in the region of a front corner (61) with respect to the working direction (AR), and that the front corner (61) is at least partially covered by the covering of the front end (71) of the butt joint (70).

4. Soil cultivation tool according to one of claims 1 to 3, characterized in that the first hard material element (20) and / or the second hard material element (50) has / has a shoulder (21) in the region of the front end (71) of the butt joint (70), wherein the covering of the front end (71) of the butt joint (70) is at least partially achieved by means of the shoulder (21).

5. Soil cultivation tool according to claim 4, characterized in that the projection (21) is provided in a front half of a longitudinal extension (27) of the first hard material element (20) measured in the working direction (AR), with respect to the working direction (AR), preferably within the front 40% of the longitudinal extension (27).

6. Soil cultivation tool (1) according to claim 4 or 5, characterized in that the extension (21) protrudes beyond the side surface (22) of the first hard material element (20) in the direction of a transverse extension (28) of the first hard material element (20) measured transversely to the working direction and parallel to a central transverse plane of the first hard material element (20), wherein the transverse extension (28) of the first hard material element (20) preferably has its maximum value in the region of the extension (21).

7. Soil cultivation tool (1) according to one of claims 4 to 6, characterized in that that a back surface (45) pointing opposite to the working direction (AR) is provided on the projection (21), which back surface (45) adjoins the side surface (22) directly or indirectly, and that a receiving space (5) is at least partially delimited by the side surface (22) of the first hard material element (20), the back surface (45) and the side surface (52) of the second hard material element (50), wherein the receiving space (5) forms in particular a soldering gap and / or adhesive gap.

8. Soil cultivation tool according to one of claims 1 to 7, characterized in that the side surface (22) of the first hard material element (20) in the region of the butt joint (70), viewed in projection onto the / a central transverse plane (46) of the first hard material element (20), has at least in regions a convex curvature (29).

9. Soil cultivation tool according to one of claims 1 to 8, characterized in that the side surface (52) of the second hard material element (50) in the region of the butt joint (70) has, at least in regions, a concave curvature (57) when viewed in projection onto the / a central transverse plane (59) of the second hard material element (50).

10. Soil cultivation tool according to one of claims 1 to 9, characterized in that, viewed in projection onto the / a central transverse plane (46) of the first hard material element (20), a radius of curvature (30) of the side surface (22) of the first hard material element (20), and / or, viewed in projection onto the / a central transverse plane (59) of the second hard material element (50), a radius of curvature (58) of the side surface (52) of the second hard material element (50) on average at least 75% of a joint length (74) of the butt joint (70) measured along the central longitudinal line (72) of the butt joint (70), preferably on average at least corresponds to the joint length (74). 11 . Soil cultivation tool according to one of claims 1 to 10, characterized in that the first hard material element (20) has on its underside (24) a support surface (24.1) directed towards the base body (10) for at least partial support on a first receiving surface (11) of the base body (10), that adjacent to the support surface (24.1), in a front region (25) with respect to the working direction (AR), a thickened portion (37) is provided which projects beyond the support surface (24.1), and that the / an extension (21) is provided in the region of the thickened portion (37) and / or the / a transition (38) between the support surface (24.1) and the thickened portion (37).

12. Soil cultivation tool according to one of claims 1 to 11, characterized in that the first hard material element (20) has on its underside (24) a support surface (24.1) directed towards the base body (10) for at least partial support on a first receiving surface (11) of the base body (10), that adjacent to the support surface (24.1), in a front region (25) with respect to the working direction (AR), a thickened portion (37) is provided which projects beyond the support surface (24.1), wherein in the transition (38) between the support surface (24.1) and the thickened portion (37) a guide surface (39) is provided which is at an angle to the support surface (24.1), and wherein the guide surface (39) is supported on a counter-guide surface (13) of the base body (10).

13. Soil cultivation tool according to one of claims 1 to 12, characterized in that the first hard material element (20) has a cutting area (31) in a / its front area (25) in the working direction (AR), wherein the cutting region (31) has a convexly curved curvature section (32) when viewed in projection onto the / a central transverse plane (46) of the first hard material element (20), wherein the curvature section (32) is adjoined, counter to the working direction (AR), by a side section (33) of the cutting region (31), which is oriented at an angle to the working direction (AR) and, when viewed in projection onto the central transverse plane (46) of the first hard material element (20), is preferably designed to be rectilinear.

14. Soil cultivation tool according to claim 13, characterized in that, viewed opposite to the working direction (AR), a transverse extent (28) of the first hard material element (20) measured transversely to the working direction (AR) increases due to the course of the curved section (32) and the side section (33), that the side section (33) ends in the / a shoulder (21) viewed opposite to the working direction (AR), and that the side surface (22) of the first hard material element (20) directly or indirectly adjoins the shoulder (21) following opposite to the working direction (AR).

15. A method for producing at least two soil working tools (1, 1') according to one of the preceding claims, which comprises the following steps for a first soil working tool (1) and a second soil working tool (1'): - providing at least one base body (10, 10'); - applying the first hard material element (20) to the / a first receiving surface (11) provided on the base body (10, 10'); - applying the second hard material element (50) to the / a second receiving surface (12) provided on the base body (10, 10'); - connection of the first and second hard material elements (20, 50) to the base body (10, 10'), in particular a material connection, preferably a soldered connection and / or an adhesive connection; characterized in that a first base body (10) of the first soil tillage tool (1), which has a first working angle (4) between the working edge (3) and the working direction (AR), is equipped with first and second hard material elements (20, 50) of a first geometric design, and in that a second base body (10') of the second soil tillage tool (1'), which has a second working angle (4') between the working edge (3) and the working direction (AR) that differs from the first working angle (4), is equipped with first and second hard material elements (20, 50) of the same geometric design, namely the first geometric design.

16. A method for producing at least two soil working tools (1, 1') according to one of the preceding claims, which comprises the following steps for a first soil working tool (1) and a second soil working tool (1'): - providing at least one base body (10, 10'); - applying the first hard material element (20) to the / a first receiving surface (11) provided on the base body (10, 10'); - applying the second hard material element (50) to the / a second receiving surface (12) provided on the base body (10, 10'); - connection of the first and second hard material elements (20, 50) to the base body (10, 10'), in particular a material-to-material connection, preferably a soldered connection and / or adhesive connection; characterized in that a first base body (10) of the first soil cultivation tool (1), which has a first bending angle (7), is equipped with first and second hard material elements (20, 50) of a first geometric configuration, and in that a second base body (10') of the second soil cultivation tool (1'), which has a second bending angle deviating from the first bending angle (7), is equipped with first and second Hard material elements (20, 50) of the same geometric configuration, namely the first geometric configuration, wherein a bending angle is formed in particular between projections of opposite working edges (3) or between projections of upper and / or lower sides of the base body in the region of opposite wings (9) onto a surface which is perpendicular to the working direction (AR).

17. A method for producing at least two soil working tools (1, 1') according to one of the preceding claims, which comprises the following steps for a first soil working tool (1) and a second soil working tool (1'): - providing at least one base body (10, 10'); - applying the first hard material element (20) to the / a first receiving surface (11) provided on the base body (10, 10'); - applying the second hard material element (50) to the / a second receiving surface (12) provided on the base body (10, 10'); - connection of the first and second hard material elements (20, 50) to the base body (10, 10'), in particular a material connection, preferably a soldered connection and / or an adhesive connection;characterized in that a first base body (10) of the first soil tillage tool (1), which has a first angle of attack (8), is equipped with first and second hard material elements (20, 50) of a first geometric design, and in that a second base body (10') of the second soil tillage tool (1'), which has a second angle of attack deviating from the first angle of attack (8), is equipped with first and second hard material elements (20, 50) of the same geometric design, namely the first geometric design, wherein an angle of attack is in particular an angle which a receiving surface (11, 18) for a first and / or second hard material element (20, 50) forms in a section perpendicular to the alignment of the working edge (3) with an upper side and / or; Underside of the base body in an adjacent area outside the receiving surface (11, 18).

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