Rübenrodeschar

Abstract

Beet harvesting share with a base part (10) having a cutting edge (S), wherein a hard material coating is arranged in the area of ​​the cutting edge (S), which has one or more deflecting surfaces (23) on its upper side, wherein the derivation surface(s) (23) are transitioned into a surface area of ​​the base part (10), and wherein this area forms a beet guidance zone, in particular a beet pressing zone (12), characterized by that the hard material coating has hard material elements which are designed as cutting elements (20) and which form the cutting edge (S) at least in some areas.

Description

[0001] The invention relates to a beet harvesting share, with a base part having a cutting edge, wherein hard material elements are arranged in the area of ​​the cutting edge which form deflecting surfaces on their upper sides, wherein the deflecting surfaces are transitioned into a surface area of ​​the base part and wherein this surface area forms a beet guiding zone, in particular a beet pressing zone.

[0002] These beet harvesting shares are used in sugar beet harvesting. They are mounted in pairs, facing each other, on a tool carrier of a harvesting machine. A tapered gap is formed between the two beet harvesting shares. The beet harvesting shares cut into the soil on both sides of the beet to be planted, loosening its root system. The beet is then lifted out of the soil through the tapered gap. Each beet harvesting share forms a beet release zone, where the beet is completely pushed out of the ground and then conveyed into a storage container. Due to the cutting process in the soil and the beet sliding on the designated surfaces of the base part, the base part experiences abrasive wear. It is known from the prior art to provide a hard coating in the cutting area to limit this wear.It has been shown that, due to leaching processes in the transition area between the hard material elements and the base part, sharp edges develop with increasing usage. These edges damage the beet being transported past, negatively impacting harvest quality.

[0003] From FR 2 378 435 A1, a device for harvesting beets is known, comprising two shares arranged at a distance from each other. A lifting zone is formed between the shares for lifting a beet from the soil. The shares have a sliding zone that extends upwards in a wedge shape in the opposite direction to the direction of travel. When the shares are moved in the direction of travel, a beet held in the soil slides onto the sliding zones and is thus lifted out of the ground.

[0004] US 5,119,888 A discloses a digging point having a plate-shaped support. A shoe is mounted in the base of the support, forming a cutting area and attaching to the support via a pin. The shoe thus constitutes a replaceable wear part.

[0005] The purpose of the invention is to provide a beet harvesting share of the type mentioned above, with which an improved harvest result is possible.

[0006] This problem is solved by designing the hard material elements as cutting elements that form the cutting edge, at least in certain areas. This results in improved service life for the beet harvesting share. Particularly in the heavily stressed cutting area, the cutting elements now directly protect the base part. Due to their tool properties, the cutting elements can maintain the sharpness of the cutting edge over a long service life. This also has a positive impact on the required machine performance.

[0007] According to a preferred embodiment of the invention, the discharge surface of at least one cutting element can be convexly curved and transition into the convexly curved beet guidance zone, particularly the beet discharge zone. This geometric design achieves improved drainage of both the soil and the discharged beet. The carbide section transitions into the curved area of ​​the base part, creating a clearance angle in the transition zone. This prevents the base part from being exposed in the wear zone. Furthermore, the risk of deposits forming due to washing processes can be largely suppressed, thus enabling improved yield.

[0008] One possible variant of the invention provides that the beet guidance zone forms a vertex line at least in the area of ​​the beet pressing zone, that the vertex line in the area of ​​the beet pressing zone is arranged at a maximum distance of 60 mm from the end of the working surface of the hard material application, in particular the cutting elements, and / or that the angle between the vertex line and a connecting line closing the deflecting surfaces is less than 15°, wherein the angle opens towards the beet pressing zone, or that the vertex line runs parallel to the connecting line at a distance of less than 25 mm.

[0009] According to a preferred embodiment of the invention, a cutting edge carrier can be angled from the base part towards the rear of the base part. The cutting edge angle can be determined via the angled cutting edge carrier. In this way, the volume of the hard material element can be optimized and thus designed cost-effectively.

[0010] According to one embodiment of the invention, it is advantageous for the cutting edge to be formed by a plurality of cutting elements arranged without gaps in the impact zone. This results in a segmentation of the cutting edge, which reduces the risk of breakage. Consequently, the functionality of the beet harvesting share is maintained even under sudden impact loads, such as those that occur when an unexpected stone strikes the surface.

[0011] For improved cutting engagement, the row of cutting elements can be terminated, at least at one end, with a terminal piece that forms an arc-shaped cutting area. This arc-shaped cutting area transitions into the linear cutting areas of the last subsequent cutting element in the row. This measure also optimizes wear, as it creates a continuous cutting geometry at the cutting ends. Furthermore, the arc-shaped shape protects the beet from damage during the pressing process.

[0012] A particularly preferred embodiment of the invention is such that the base part is designed as a forging and has a convexly curved upper surface and a concavely curved lower surface. This results in a stable, shell-like structure that can be manufactured with minimal material. The use of a forging, in conjunction with the shell-like structure, enables the reliable transfer of even unexpectedly large machining forces. The shell-like structure allows for elastic compliance to be introduced into the tool system. The load transfer is further enhanced by the toughness of the forging. The forging also allows the material thickness to be adapted to the specific requirements of the wear zone.

[0013] Furthermore, it is conceivable that the beet harvesting share has a marking field on its base in the area of ​​the contact surface. When assembled, the contact surface rests against a counter surface of the tool carrier. This protects the marking field from wear. In the event of maintenance, the beet harvesting share can then be easily identified and replaced with an unworn beet harvesting share of the same type.

[0014] A reliable and secure connection between the cutting element and the base part is achieved when the cutting element has a mounting piece that forms the discharge surface and whose underside, facing away from the discharge surface, is connected to a cutting element carrier of the base part, particularly by a material bond. For example, the carbide cutting element can be brazed to the base part.

[0015] A particularly wear-resistant tool design is easily achieved by transitioning the convex deflecting surface of the cutting element into the similarly convex cutting area, with the radius of curvature of the cutting area preferably being selected between 0.5 mm and 3.5 mm. This curvature allows for a sharp-edged engagement of the workpiece base, thus reducing the required machine power. Furthermore, it provides sufficient protection against cutting edge breakage.

[0016] Furthermore, it has been shown that the cutting elements are sufficiently break-resistant, especially under harsh operating conditions, if they have an extension in the longitudinal direction of the cutting area in the range between 10 mm and 50 mm and the extension transverse to the longitudinal direction of the cutting area is chosen to be in the range between 20 mm and 60 mm.

[0017] The invention will be explained in more detail below with reference to an embodiment illustrated in the drawings. The drawings show: Fig. 1 a beet harvesting share in perspective front view, Fig. 2 the beet harvesting share according to Fig. 1 in front view, Fig. 3 the beet harvesting share according to the Fig. 1 and Fig. 2 in rear view, Fig. 4 a cutting element of the beet harvester share according to the Fig. 1 to 3 in perspective view, Fig. 5 the cutting element according to Fig. 4 in side view, Fig. 6 the beet harvesting share according to Fig. 2 in view from the left and Fig. 7 in Fig. Detail 6 marked with VII in enlarged view.

[0018] Fig. Figure 1 shows a beet harvesting share with a base part 10, which is manufactured as a forged part from a steel material. The base part 10 is provided with two rows of mounting receptacles 11 in a mounting area. The mounting receptacles 11 of each row are spaced at equal intervals from each other. A cutting edge carrier 16 is provided in the area of ​​a longitudinal edge of the base part 10. This is angled towards the rear of the base part 10, in particular bent with a large radius. The cutting edge carrier 16 is fitted with a row of cutting elements 20. The cutting elements 20 consist of a hard material, in particular a carbide or a ceramic material. To provide a uniform bearing surface for the cutting elements 20, the cutting edge carrier 16 is provided with a flat shoulder, as shown in the Fig. 7 can be seen. Fig. Figure 1 further shows that the series of cutting elements 20 is equipped with end pieces 30 at both of its longitudinal ends.

[0019] The base part 10 forms a beet guiding area with a beet pressing zone 12 following the cutting carrier 16. In the area of ​​the beet pressing zone 12, the base part 10 is convexly curved. A convex bulge is used in this design. Following the beet pressing zone 12, the base part 10 transitions via a step-like section 14 into a projection 13. The projection 13 forms a guide surface 13.1. An angled inclined surface 15 is provided in the transition area between the row of cutting elements 20 and the projection 13.

[0020] With reference to Fig. 4 and Fig. Section 5 below explains the design of the cutting elements 20 in more detail. As these illustrations show, the cutting elements 20 have a mounting piece 21. This forms a convexly curved discharge surface 23 on its upper surface. The underside 25 of the cutting element 20, facing away from the discharge surface 23, is flat. The discharge surface 23 transitions into the convex cutting area 26, which is linear. A projection 22 is integrally formed on the mounting piece 21 and protrudes beyond the underside 25 on the rear side. This projection 22 is provided with a clearance surface 27 following the rounded cutting area 26. The clearance surface 27 transitions at an angle into a support surface 28. The support surface 28, in turn, transitions into the underside 25 via a rounded transition 29. The underside 25 transitions into the discharge surface 23 via a rounded end section 24.

[0021] How Fig. As can be seen in Figure 2, a large number of identical cutting elements 20 are mounted on the cutting carrier 16 and arranged one after the other without gaps. The cutting elements 20 all have the same longitudinal extent T in the direction of their cutting areas 26. The length of the deflecting surface 23 is measured transversely to the longitudinal extent T. Fig. 2 with the dimension L specified.

[0022] As mentioned above, the series of cutting elements 20 is terminated at its longitudinal ends by end pieces 30. The end pieces 30 have essentially the same design as the cutting elements 20 and therefore comprise a mounting piece 21 with a projection 22 and convexly curved deflecting surfaces 23. They have a rounded end section 24 and a flat underside 25 with which they rest on the cutting element carrier 16. The projection 22 forms a cutting area 26 and a clearance surface 27. Furthermore, the projection 22 includes a support surface 28, which transitions into the underside 25 via a rounded transition 29. In contrast to the cutting elements 20 described above, as Fig. As can be clearly seen in Figure 2, the cutting area 26 of the end pieces 30 is not linear, but has an at least partially convex arc-shaped profile. This convex profile of the cutting area 26 transitions seamlessly into the linear cutting area 26 of the subsequent cutting element 20.

[0023] In the Fig. 6 and Fig. Figure 7 shows a more detailed representation of the relationship between the end pieces 30 and the base part 10. As this illustration demonstrates, the end pieces 30, with their undersides 25 and support surfaces 28, are placed onto corresponding mating surfaces of the base part 10 and connected to it via an interposition of a material bond, in particular a soldering material. The cutting elements 20 are attached in an analogous manner. Here, too, the cutting elements 20, with their undersides 25 and support surfaces 28, are soldered to the base part. In the assembled state, the convex guide surfaces 23 of the cutting elements 20 and the end pieces 30 transition seamlessly into the adjacent guide areas of the base part 10. The guide areas of the base part 10 are also convex. Fig. Figure 1 shows that the rear part of the row of cutting elements 20 in the feed direction with their deflection surfaces 23 are transferred into the convex beet pressing zone 12.

[0024] From the Fig. 6 and Fig. Figure 7 clearly shows the shell-like structure of the beet harvesting share. Accordingly, the beet harvesting share has a concavely concave inner surface 19 on the underside and a convexly curved outer surface opposite it.

[0025] Fig. Figure 3 clearly shows the rear view of the beet harvesting share. As this illustration shows, both the inclined surface 15 and the cutting support 16 are angled towards the rear relative to the base part 10. A mounting surface 17 is provided on the rear side of the beet harvesting share. The mounting receptacles 11 open into this mounting surface 17. The mounting surface 17 is oriented in space such that it is at a 90° angle to the central longitudinal axes of the mounting receptacles 11.

[0026] To attach the beet harvesting share, its mounting surface 17 is placed on a corresponding surface of a tool carrier. The beet harvesting share is then screwed to the tool carrier using one of the mounting brackets 11 in each row. This results in a defined angle of attack of the beet harvesting share relative to the tool carrier. If the angle needs to be changed, the beet harvesting share is moved relative to the tool carrier and then screwed to the tool carrier using one of the next mounting brackets 11 in the row. With this simple measure, the beet harvesting share's orientation can be adjusted to suit the specific requirements.

[0027] In the area of ​​the mounting surface 17, a marking field 18 is provided on which the type of beet harvesting share is marked. For example, the marking field 18 can be a stamp-like inscription.

Claims

[1] Beet harvesting share with a base part (10) having a cutting edge (S) wherein a hard material coating is arranged in the area of ​​the cutting edge (S) having one or more deflecting surfaces (23) on its upper side, wherein the derivation surface(s) (23) are transitioned into a surface area of ​​the base part (10), and wherein this area forms a beet guidance zone, in particular a beet pressing zone (12), characterized by , that the hard material coating has hard material elements which are designed as cutting elements (20) and which form the cutting edge (S) at least in some areas. [2] Beet harvesting share according to claim 1, characterized by , that the deflecting surface (23) of at least one cutting element (20) is convexly curved and transitions directly or indirectly into the convexly curved beet guide, in particular beet expression zone (12). [3] Beet harvesting share according to claim 1 or 2, characterized by , that the beet guidance zone forms a vertex line (SL) at least in the area of ​​the beet expression zone (12), that the apex line (SL) in the area of ​​the beet pressing zone (12) is arranged at a maximum distance of 60 mm from the deflecting surface (23) of the hard material application, in particular the cutting elements (20), and / or that the angle between the apex line (SL) and a connecting line (VL) closing the deflecting surfaces (23) is less than 15°, with the angle opening towards the beet pressing zone (12), or that the apex line (SL) runs parallel to the connecting line (VL) at a distance of less than 25 mm. [4] Beet harvesting share according to one of claims 1 to 3, characterized by , that a cutting support (16) is angled from the base part (10) to the back of the base part (10). [5] Beet harvesting share according to one of claims 1 to 4, characterized by, that the cutting edge (S) is formed by a plurality of cutting elements (20) which are arranged without gaps in the impact area. [6] Beet harvesting share according to claim 5, characterized by , that the series of cutting elements (20) is terminated at least in the area of ​​one end of the series with a terminal piece (30) which forms an arc-shaped cutting area (26) and wherein the arc-shaped cutting area (26) transitions into the linear cutting areas (26) of the last subsequent cutting element (20) of the series of cutting elements (20). [7] Beet harvesting share according to one of claims 1 to 6, characterized by , that the base part (10) is designed as a forged part and has a convexly curved top surface and a concavely curved bottom surface. [8] Beet harvesting share according to one of claims 1 to 7, characterized by , that the base part (10) has a labeling field (18) in the area of ​​the mounting surface (17). [9] Beet harvesting share according to one of claims 1 to 8, characterized by , that the cutting element (20) has a fastening piece (21) which forms the deflecting surface (23) and which is connected with its underside (25) facing away from the deflecting surface (23) to a cutting support (16) of the base part (10) in a material-bonded manner. [10] Beet harvesting share according to claim 9, characterized by , that the fastening piece (21) of the cutting element (20) has a projection (22) which forms the cutting edge (26) and protrudes at least partially beyond the underside (25) of the fastening piece (21). [11] Beet harvesting share according to one of claims 1 to 10, characterized by , that the convex deflecting surface (23) of the cutting element (20) transitions into the also convexly curved cutting area (26), wherein the radius of curvature of the cutting area (26) is preferably in the range between 0.5 mm and 3.5 mm. [12] Beet harvesting share according to one of claims 1 to 10, characterized by , that the extension of the cutting element (20) in the longitudinal direction of the cutting area (26) is in the range between 10 mm and 50 mm (T) and / or the extension transverse to the longitudinal direction of the cutting area (26) is in the range between 20 mm and 60 mm (L).

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