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EP-4531534-B1 - HARD METAL PROTECTION FOR PLOUGH UNITS

EP4531534B1EP 4531534 B1EP4531534 B1EP 4531534B1EP-4531534-B1

Inventors

  • Krämer, Ulrich
  • SEIFRIED, FABIAN

Dates

Publication Date
20260513
Application Date
20230403

Claims (17)

  1. A landside (1) for use with a plow, wherein the landside (1) has a landside body (1.1) having a diverting face (2), a rear face (3) opposite from the diverting face (2) and an underside (4) connecting the diverting face (2) and the rear face (3), wherein the landside body (1.1) has wear-protection element mounts (10), in which wear-protection elements (20) made of hard material are mounted, characterized in that the wear-protection element mounts (10) are incorporated into the underside (4), and in that the wear-protection elements (20) are preferably designed as pins.
  2. The landside (1) according to claim 1, characterized in that the wear-protection element mounts (10) are designed as bores, and in particular in that the wear-protection element mounts (10) do not intersect the diverting face (2) and the rear face (3).
  3. The landside (1) according to claim 1 or 2, characterized in that a shoulder (9) is provided on the landside body (1.1) in the area of the underside (4) in such a way that the underside (4) is at least partially formed by the shoulder (9).
  4. The landside (1) according to any of claims 1 to 3, characterized in that the wear-protection elements (20) have a shank (21), in that the wear-protection element mounts (10) have a shank mount (11), which is designed to at least partially match the shank (21), and in that the shank (21) is preferably completely received in the shank mount (11), in particular in that the wear-protection elements (20) are at least partially held in the wear-protection element mounts (10) by a material bond, preferably a soldered connection.
  5. The landside (1) according to any of claims 1 to 4, characterized in that the wear-protection elements (20) are disposed along a longitudinal extent of the landside body (1.1), and in that preferably distances (Y20) between the wear-protection elements (20) are constant or variable.
  6. The landside (1) according to any of claims 1 to 5, characterized in that the wear-protection elements (20) are arranged in at least one row extending in the direction of the longitudinal extent, wherein the at least one row of wear-protection elements (20) is arranged centrally or eccentrically between the diverting face (2) and the rear face (3).
  7. The landside (1) according to claim 6, characterized in that the wear-protection elements (20) are arranged in several rows, in that a row spacing (Z_20) is provided between the rows, in that the spacings (Y20) of the wear-protection elements (20) in the rows differ from one another or are identical, preferably in that the wear-protection elements (20) of one row are arranged symmetrically or staggered relative to those of at least one other row.
  8. The landside (1) according to any of claims 1 to 7, characterized in that the wear-protection element mounts (10) are aligned perpendicular to the underside (4) or at an angle (α) to the surface normal of the underside (4), or in that at least one wear-protection element mount (10) is aligned perpendicular to the underside (4) and at least one wear-protection element mount (10) is aligned at an angle (α) to the surface normal of the underside (4).
  9. The landside (1) according to any of claims 1 to 8, characterized in that the wear-protection elements (20) have a shank end (22) on one side and an opposing head surface (23), preferably in that the head surface (23) of at least one wear-protection element (20) is plane or has a curvature (23.1), preferably a convex curvature (23.1), and/or in that the shank end (22) of at least one wear-protection element has an insertion chamfer.
  10. The landside (1) according to claim 9, characterized in that at least two wear-protection elements (20) are mounted in at least one wear-protection element mount (10) and are aligned in the direction of the central longitudinal axes of the wear-protection elements (20), wherein the head surface (23) of a wear-protection element (20) is preferably in direct or indirect contact with the shank end (22) of another wear-protection element (20).
  11. The landside (1) according to claim 9 or 10, characterized in that at least one of the wear-protection elements (20) has a head (24) in the area of the head surface (23), which head directly or indirectly adjoins the shank (21), wherein the head (24) preferably has a larger outer circumference than the shank (21).
  12. The landside (1) according to claim 11, characterized in that at least one wear-protection element mount (10) has a head mount (13), which is designed to at least sectionally match the head (24), wherein the head (24) is at least partially received in the head mount (13).
  13. The landside (1) according to claim 11 or 12, characterized in that at least one of the wear-protection elements (20) has a transition section (25) between the shank (21) and the head (24), which transition section is preferably designed having a conical outer contour or having a convex or concave outer contour, in particular is designed as a rounding.
  14. The landside (1) according to claim 13, characterized in that at least one wear-protection element mount (10) has a transition area (14), which is designed to match the transition section (25), wherein the transition section (25) is at least partially received in the transition area (14).
  15. The landside (1) according to any of claims 11 to 14, characterized in that the head (24) of at least one wear-protection element (20) has a central longitudinal head axis (ML24), which is spaced apart from a central longitudinal shank axis (ML21) of the shank (21).
  16. The landside (1) according to any of claims 11 to 15, characterized in that the head (24) has a lateral head surface (24.2), which is elliptical or rotationally symmetrical, in particular in the form of a cylindrical or conical surface, or in that the head (24) has several lateral head surfaces (24.2), in particular that the head (24) has a polygonal, particularly preferably a rectangular cross-section.
  17. The landside (1) according to any of claims 1 to 16, characterized in that the wear-protection elements (20) are made of hard metal, preferably of tungsten carbide.

Description

The invention relates to a plowing system for use with a plow, wherein the plowing system has a system body with a drainage side, a rear side opposite the drainage side and an underside connecting the drainage side and the rear side, wherein the system body has wear protection element receptacles in which wear protection elements made of hard material are received. Ploughing systems of the type mentioned above are used with plows for soil cultivation, particularly for tilling arable land. The plough serves to turn and loosen the soil. In this process, the plough is pulled through the soil in a specific direction, cutting a furrow. A plough typically includes a share with a point to cut the furrow into the soil. A moldboard, attached to the share, serves to deflect and turn the material cut by the share. This creates forces on the plough, both towards the furrow edge and towards the bottom of the furrow. To absorb the forces acting towards the furrow edge, a plow assembly attached to the plow is typically used. A plow assembly can be a component with a plate-shaped body that connects directly or indirectly to the share in the direction of travel and whose longitudinal extent is essentially aligned with the direction of travel. The plow assembly rests with its deflecting side against the furrow edge and its underside against the furrow bottom. The forces acting on the plow towards the furrow edge are at least partially supported by the deflecting side against the furrow edge. Furthermore, the forces towards the furrow bottom are also at least partially transferred to the plow assembly, so that its underside is pressed against the furrow bottom. Consequently, plow assemblies are subject to high wear on their deflecting side and underside due to the passing material. Ploughing systems are typically manufactured from materials with low wear resistance, such as basic structural steels. To protect the ploughing system from excessive wear, it is known to equip the discharge side, in particular, with plate-shaped wear protection elements made of a wear-resistant hard material. For this purpose, known ploughing systems incorporate wear protection element receptacles in the form of recesses, which are usually milled into the discharge side. Plate-shaped wear protection elements are then inserted into these receptacles. A plowing system with ceramic inserts to increase wear resistance is from the WO 8204375 A1 The ploughing system consists of a perforated steel plate that is attached to a plough by means of screws. Sintered ceramic plates are inserted into the perforations of the steel plate and secured by adhesive. When a plow is pulled through the soil during tillage, the sliding material exerts high abrasive pressure on the leading edge and the underside of the plow. This process initially washes away the less wear-resistant material of the plow body, so that... Over time, wear protection elements may become partially exposed and thus more vulnerable to the forces exerted by the sliding material. This creates a risk, particularly with plate-shaped wear protection elements, of breakage at the edges, especially if they are made of brittle hard material. Furthermore, erosion of the material of the system housing can lead to the wear protection elements no longer being adequately held and/or supported by the housing. Consequently, impact loads cannot be absorbed by the comparatively tough housing housing, and the risk of breakage of the hard material increases. The wear protection elements can also be lost if the erosion progresses. As already mentioned, high wear pressure occurs not only on the discharge side but also on the underside. Even if the underside is protected by wear protection elements, a similar situation arises as on the discharge side. The material of the system housing is also washed away on the underside, exposing the wear protection elements to the risks of breakage and/or loss already described above. Early wear of the plow assembly initially results in a short service life. This necessitates more frequent plow replacements, leading to increased parts and labor costs. Downtime in soil cultivation also ensues. The loss of wear protection elements is detrimental due to the high cost of hard materials. Furthermore, it is also undesirable for hard material elements to remain in the soil for subsequent soil cultivation. To counteract the described disadvantages, a large quantity of expensive hard material can be used in known plowing systems, for example, to cover the largest possible area of the drainage side and, if necessary, the To cover the underside and thus reduce erosion of the system body. Considerable effort can also be invested in designing the wear protection element receptacles in such a way that the wear protection elements are held as securely as possible to the system body. This results in high costs due to the required material and manufacturing effort. The object of the invention is t