Abstract
An insert of hard metal for an agricultural device, for example a grubbing share or a mower blade, having actively cutting areas that act in a cutting direction. Teeth are at least partially provided between the actively cutting areas, which viewed from above protrude over the actively cutting areas.
Claims
1. An insert comprised of hard metal for an agricultural device, for example a grubbing share or a mower blade, having actively cutting areas that act in a cutting direction, wherein teeth are at least partially provided between the actively cutting areas, which viewed from above protrude over the actively cutting areas.
2. The insert according to claim 1, wherein at least individual, actively cutting areas lie completely behind the adjacent teeth as viewed from above.
3. The insert according to claim 1, wherein the teeth are elevated in design in relation to cutting edges of the actively cutting areas.
4. The insert according to claim 1, wherein the actively cutting areas are designed with a roughly V-shaped progression as viewed from above.
5. The insert according to claim 1, wherein at least three teeth are provided, which separate the actively cutting areas from each other.
6. The insert according to claim 1, wherein the actively cutting areas lie at the same height as viewed from the front.
7. The insert according to claim 1, wherein the insert is integral in design.
8. The insert according to claim 1, wherein the insert is coated.
9. An agricultural implement with an insert according to claim 1.
Description
[0015] Based on the advantages described above, an insert according to the invention is used in an agricultural implement. For example, the agricultural implement can be a straw shredder blade, a mower blade, a beet-topping cutter, a pruning hammer, a flail mover blade, loading wagon blades, balers and fodder mixing plants, grubbing shares or a disk for a disk harrow. Additional features, advantages and effects of the invention may be gleaned from the exemplary embodiments presented below. The drawings hereby referenced show:
[0016] FIG. 1 a top view of an insert according to the invention;
[0017] FIG. 2 a part of a front view of the insert from FIG. 1;
[0018] FIG. 3 a magnified illustration of the section III on FIG. 1;
[0019] FIG. 4 a complete front view of the insert from FIG. 1;
[0020] FIG. 5 a section along the line V-V on FIG. 1;
[0021] FIG. 6 a section along the line VI-VI on FIG. 1;
[0022] FIG. 7 a straw shredder blade;
[0023] FIG. 8 a grubbing share;
[0024] FIG. 9 a disk for a disk harrow;
[0025] FIG. 10 a baler blade.
[0026] FIG. 1 shows an insert 1 according to the invention. The insert has an integral design, even though it is also possible for the insert 1 to be composed of several parts with the same geometric shape. It is advantageous both generally and for the insert 1 that the latter be integral in design.
[0027] The insert 1 consists of a hard metal. The hard metal can be a common hard metal. Preference goes to types with roughly an average size, i.e., those that do not fit the classic definition of a fine grain, but are also not too coarse. It has proven especially beneficial in practice that an average grain size of the hard material particles, for example tungsten carbide, range between 2.0 m and 3.0 m. The normally used cobalt is preferably applied as the binding metal, even though other binding metals based on nickel and/or iron are possible as well. Also possible are combinations of these latter metals with cobalt as well as a combination of cobalt with nickel and iron as the binding metal. A percentage of hard material particles, such as tungsten carbide, usually ranges from 88% w/w to 95% w/w, in particular from about 88% w/w to 92% w/w. The remainder is comprised of the binding metal cobalt, for example. Of course, it is also possible that at least a portion of the tungsten carbide be replaced by other hard material particles, for example titanium carbide.
[0028] The insert 1 has a front side 11 and an opposing rear side 12. The front side 11 and rear side 12 are connected with each other on the insert 1 by connecting sides 13, as visible from the top view on FIG. 1. Provided at the transition from the rear side 12 in the connecting sides 13 are rounded areas 14, even though the corresponding transitions could also be angular in design. However, the rounded areas 14 have proven themselves expedient for attaching the insert 3 in an agricultural implement or a component for the latter, a process yet to be described below. The front side 11 of the insert 1 has roughly a zigzag structure as viewed from above. The zigzag structure is defined by actively cutting areas 2 and teeth 3. The teeth 3 are basically each arranged between the actively cutting areas 2. The zigzag structure can also be sealed off on the outside by additional teeth 3. In this case, no additional actively cutting areas adjoin the outermost teeth 3 arranged on the outside. In the embodiment variant depicted on FIG. 1, however, each respective tooth 3 is enveloped by two adjacent, actively cutting areas 2.
[0029] As especially clearly evident from the top view on FIG. 1, the actively cutting areas 2 are recessed in relation to the teeth 3. If the insert 1 fastened to an agricultural implement or a component for an agricultural implement that is in turn fastened to the agricultural implement is effectively moved in the direction of a cutting direction S, the teeth 3 serve as quasi-crash zones, for example which can be hit by rocks, but without them reaching the actively cutting areas 2. To this end, the teeth 3 are spaced apart from each other by a distance of about 5 mm to 25 mm, preferably of 6 mm to 20 mm. The specific distance depends on the expected loads or material to be processed, and can be set as a function thereof, for example for processing soil or cutting straw. As a consequence, the teeth 3 also intercept any impacts, so that the actively cutting areas 2 are correspondingly protected.
[0030] As evident in the front view on FIG. 2, the teeth 3 offset relative to each other are elevated in relation to the actively cutting areas 2, and must thus be regarded as a material reinforcement. This material reinforcement of the teeth 3 satisfies a dual functional principle: While the actively cutting, recessed areas 2 are intended to allow a cutting of material for as long as possible, the teeth 3 are intended to eliminate impacts and other disruptions that basically diminish the service life of the actively cutting areas. This design of the insert 1 makes it possible to achieve a very good service life. Since the teeth 3 are also designed with an elevation, for example an elevation of up to 1 mm, in relation to the actively cutting areas 2 as the baseline, the teeth 3 can be kept relatively narrow without impairing the function. The width of the teeth 3 along the zigzag structure (see FIG. 1 or FIG. 2) is usually less than 30%, preferably less than 25%, especially preferably less than 20%, of the length of an actively cutting area 2 lying in between.
[0031] As evident on FIG. 2, the front side 11 of the insert 1 is tapered in design in terms of the thickness, which makes sense for a good cutting effect. In the adjacent area, the insert 1 is designed with a constant thickness. Also evident from FIG. 2 in particular is the elevated configuration of the teeth 3 in relation to the actively cutting areas 2, as shown on FIG. 4 for a complete front view.
[0032] FIG. 3 shows a cutout III according to FIG. 1. As evident, the depicted actively cutting area 2 adjoined by two teeth 3 is essentially V-shaped in design. As shown, it may here be best to avoid any corners by using rounded areas. This diminishes the risk, that the insert 1 will break out at certain points, since tension peaks are reduced. On FIG. 3, the actively cutting area 2 forms cutting edges 4, which deliver the actual cutting performance in the insert.
[0033] FIG. 5 shows a section along the line V-V on FIG. 1, and FIG. 6 a corresponding section along the line VI-VI, also on FIG. 1. As evident yet again from these sectional illustrations, the insert 1 tapers conically on the front side 11, wherein the teeth 3 are configured with an elevation or more material by comparison to the actively cutting areas 2.
[0034] An insert 1 according to the invention can be used in any components for agricultural implements or even in the latter themselves, for example as a straw shredder blade, mower blade, beet-topping cutter, pruning hammer, flail mover blade, loading wagon blades, balers and fodder mixing plants, grubbing shares or in a dish for a disk harrow. Several exemplary embodiments for the above will be shown below. For example, FIG. 7 shows a straw shredder blade, FIG. 8 grubbing snares, FIG. 9 a disk for a disk harrow, and FIG. 10 a baler blade. All exemplary embodiments share in common that an insert 1 according to the invention is used. Even if not mandatory, a respective plurality of inserts 1 is provided in the exemplary embodiments, which act in a cutting direction S. The inserts 1 are here usually positioned at an angle of attack relative to the base of the respective tool of about 5 to 25, in particular of 10 to 20. The inserts 1 can be secured to the corresponding components or tools via soldering. It is here preferred that the insert 1 be spaced apart at least minimally from the respective next insert 1. However, it is also possible that the individual inserts 1 be arranged so as to adjoin or contact each other. Regardless of the kind of tool or the component, it is especially advantageous for accommodating one or several inserts 1 that pockets corresponding thereto be provided, into which the inserts 1 are placed. Fastening can take place integrally, in particular via soldering.
[0035] One essential advantage to an insert 1 according to the invention apart from a high service life is also that the insert 1 can be used in nearly any agricultural implements or components for the latter, as also evident from the exemplary embodiments according to FIG. 7 to FIG. 10. This significantly reduces warehousing, since the same parts can always be used.
