Blade for a mower deck, for a lawnmower and / or for a brushcutter

Abstract

The invention relates to a blade (01) having a base (02) and at least one cutting edge (03, 04) arranged on one side (SB1, SB2, LB1, LB2) of the base (02) and connected to the base (02), wherein the cutting edge (03, 04) has a first degree of hardness and the base (02) has a second degree of hardness, wherein the first degree of hardness of the cutting edge (03, 04) is greater than the second degree of hardness of the base (02). Furthermore, the invention relates to a blade system (10) comprising a blade (01), a mower (20) with a retaining element (21) comprising a blade (01) and / or a blade system (10), a lawn mower (30) with a blade (01) and / or a blade system (10) and / or a mower (20) and a brush cutter (40) with a blade (01) and / or a blade system (10) and / or a mower (20).

Description

[0001] The invention relates to a blade for a mower, a lawnmower, and / or a brush cutter. Furthermore, the invention relates to a mower, a lawnmower, and / or a brush cutter with a blade according to the invention.

[0002] Blades or knives used as grass cutting tools for use in the mowing decks of lawn mowers and / or brush cutters are currently manufactured from alloyed carbon steels with a hardness of approximately 55 HRc to 59 HRc (Rockwell hardness). While these blades are less prone to breakage, they wear very quickly. Consequently, they must be replaced frequently. It is also known from the prior art that such blades are made from high-speed steels (HSS), with a hardness typically ranging from 64 HRc to 66 HRc. While these blades have a long cutting edge life, they are also very prone to breakage when colliding with objects or obstacles. A blade with different hardnesses is described, for example, in US 2022 / 0 030 766 A1 and US 2023 / 0 000 012 A1.

[0003] The prior art also uses blade holding elements or fastening devices for blades, whereby the blade is held radially and axially movable by a collar screw arranged in a receiving bore or slot. According to the prior art, the collar screws are either not tempered or only lightly tempered, which in particular causes high wear between the receiving bore or slot of the blade and the collar of the collar screw. This wear significantly impairs the functionally necessary mobility of the blade relative to the blade holding element, which in turn experience shows leads to a not insignificant deterioration in the cutting and mowing results. Consequently, the prior art requires that the collar screw be regularly replaced together with the blade, which is neither economical nor sustainable.In addition, the collar screws used in the state of the art are expensive and complex to manufacture, especially when made from highly tempered steel.

[0004] Based on the above, one object of the present invention is to propose a blade and / or a blade system that is low-wear and resistant to breakage. Furthermore, the manufacturing and assembly costs of such a blade or blade system are to be minimized.

[0005] This problem is solved in a surprisingly simple but effective manner by a blade according to the teaching of independent claim 1. Furthermore, the problem is solved by a blade system with such a blade. A mower with the features of independent claim 15, a lawnmower with the features of independent claim 16, and a brush cutter with the features of independent claim 17 are also proposed.

[0006] According to the invention, a blade is proposed, comprising a base and at least one cutting edge arranged on one side of the base and connected to the base. The blade is characterized in that the cutting edge has a first degree of hardness and the base has a second degree of hardness, wherein the first degree of hardness of the cutting edge is greater than the second degree of hardness of the base. Within the scope of the invention, the base is a body part facing away from the cutting edges and / or the cutting edges of the cutting edges. The base is preferably arranged between the cutting edges.

[0007] It has proven advantageous if the blade according to the invention is manufactured in a simple and cost-effective manner from a bimetal or trimetal. In other words, the blade is preferably constructed from at least two sections, the base and the cutting edge, which are made of different materials, preferably metals.

[0008] The base can be lightly tempered and have a hardness of 120 to 170 HV (Vickers hardness), making it robust and fracture-resistant. The base can therefore be suitable for machining using a punching process. The cutting edges can be highly tempered and / or made of high-speed steel (HSS) and / or have a hardness of 280 to 320 HV. This allows the cutting edges to exhibit high homogeneity and good grindability.

[0009] Because the base is softer, i.e., has a lower degree of hardness than the cutting edges, the blade according to the invention has a relatively flexible structure in the base and thus in the connection area to a mowing device, such as a mower, a lawnmower, or a brush cutter. This allows loads that may arise, for example, from a collision with objects or obstacles to be compensated, thus preventing breakage of the generic blades. In contrast, the cutting edges have a higher degree of hardness, which allows them to withstand cutting loads over a long period of time, thus minimizing wear and the frequency of blade replacement.

[0010] In a preferred embodiment of the invention, the first hardness of the cutting edge may be at least 20%, at least 30%, at least 40%, up to 50% greater than the second hardness of the base.

[0011] The width ratio of base to cutting edge (width of base : width of cutting edge) is preferably between 2.5 and 6, more preferably between 3.5 and 5, and most preferably between 4 and 4.5, in particular 4.1. The ratio of the length of the face of the base to the length of the face of the blade is preferably between 0.5 and 0.8, more preferably between 0.55 and 0.75, and most preferably between 0.6 and 0.7, in particular 2 / 3.

[0012] The ratio of blade length to blade width (measurement of the long side of the blade : measurement of the front side of the blade) is preferably between 1.3 and 3, more preferably between 1.5 and 2.5 and most preferably between 1.8 and 2.2, in particular 2.

[0013] The blade can preferably be 20 mm to 60 mm long, more preferably 25 mm to 50 mm long, and most preferably 35 mm to 40 mm long. The blade can be 36 mm long. The blade is preferably 8 mm to 30 mm wide, more preferably 12 mm to 25 mm wide, and most preferably 17 mm to 20 mm wide, especially 18.8 mm wide.

[0014] The blade, in particular the base, may have a plate-shaped body with a constant thickness (s). The thickness is preferably 0.2 mm to 3 mm, more preferably 0.5 mm to 1.8 mm, and most preferably 0.65 mm to 1 mm.

[0015] The cutting edges of the blade can be formed by an edge section that is adjacent to the base, in particular firmly attached thereto, preferably welded, and has a tapered cross-section. The cutting edge can have a one-sided cutting angle or a two-sided cutting angle. The cutting angle can preferably be 5° to 25°, more preferably 10° to 20°, and most preferably 15°.

[0016] A soft base of the blade according to the invention advantageously ensures a certain degree of flexibility, which reduces the blade's susceptibility to breakage, while the cutting edges, which are harder than the base, can withstand high cutting loads without deformation. Within the scope of the invention, it was recognized that the blade according to the invention can be optimally and individually adapted to the load conditions and requirements by selecting suitable materials and adjusting the ratio of the dimensions of the cutting edge to the base.

[0017] According to the invention, a recess extending through the blade is provided in the base for holding the blade, for example, on a mower. The recess, which is designed as a sinusoidal slot, can be produced using smooth cutting and / or fine blanking processes, whereby a high surface quality and dimensional accuracy can be achieved, which counteracts wear on the recess and, if applicable, on a corresponding surface of a fastening element. The recess allows the blade to be turned and accommodates a fastener and / or fastening element. The slot-shaped recess allows the blade to be attached to the mower, for example, with a screw, and can be held both radially and axially movable.

[0018] The central axis or axis of symmetry of the recess may coincide with the central axis or axis of symmetry of the blade.

[0019] The recess extends along a sinusoidal curve. The slot-shaped recess therefore does not extend continuously along the central axis, but is rather offset, preferably symmetrically, from the central axis of the blade. More preferably, the inflection point of the sinusoidal curve lies on the central axis and / or the axis of symmetry of the blade. The recess can be designed as an elongated hole extending along a curve, wherein the recess terminates at its ends in a semicircle and / or ends in a circular bore. The curved recess, designed in the manner of a slot, does not have to run parallel to the cutting edges of the blade, but the ends of the recess can be symmetrically offset from the central axis of the blade. The ends of the recess are preferably offset from the central axis of the blade by 0.5 mm to 5 mm, more preferably by 1 mm to 3 mm, and most preferably by 1.5 mm.The slot-shaped recess is preferably 10 mm to 40 mm long, more preferably 15 to 30 mm long, and most preferably 20 to 25 mm long. The slot-shaped recess is preferably 2 mm to 15 mm wide, more preferably 3 to 10 mm wide, and most preferably 4 to 7 mm, in particular 5 mm, wide.

[0020] The inventive extension of the recess along a curve, deviating from a straight line, can slow down a sudden movement of the blade in the axial direction, for example when the blade strikes an object or an obstacle. Because the blade is guided along the curve of the recess when it strikes an obstacle, particularly when the blade is connected to the mower deck via a screw, shock absorption can be achieved by the curved recess. In addition, if the blade undesirably strikes an obstacle and the associated axial movement of the blade on a fastening means or on the mower deck, the curved recess initiates a rotational movement of the blade, which advantageously moves the cutting edges away from the object that collided with the blade.Thus, the advantageous embodiment, according to which the recess extends along a curve, can significantly reduce the susceptibility of the blade to breakage and the wear on the mower, in particular a holding element, fastening means and / or fastening element.

[0021] Advantageous embodiments of the invention are the subject of the dependent claims. Furthermore, all combinations of at least two features disclosed in the description, the claims, and / or the figures fall within the scope of the invention. It is understood that the statements made regarding the blade relate equivalently to the blade system according to the invention, without being mentioned separately for this. Likewise, all features and embodiments disclosed regarding the blade and the blade system relate equivalently to the mower according to the invention, the lawnmower according to the invention, and the brush cutter according to the invention.In this context, it is understood in particular that customary linguistic transformations and / or a corresponding replacement of respective terms within the framework of usual linguistic practice, in particular the use of synonyms supported by generally accepted linguistic literature, are encompassed by the present disclosure content without being explicitly mentioned in their respective formulation.

[0022] According to a preferred embodiment, the cutting edges can form at least two opposite sides of the blade. The cutting edges preferably form the long sides of the blade. Accordingly, the cutting edges can preferably be arranged on opposite long sides of the base. The two opposite sides of the blade, which are formed by the cutting edges, preferably run parallel to one another. More preferably, the base is designed as a rectangle in plan view with two end faces of the base and two long sides of the base. It is conceivable for the blade to also be designed as a rectangle, with one end face of the blade being arranged adjacent to two long sides of the blade.

[0023] The base and the at least one cutting edge can be welded together. Welding enables a cost-effective and durable connection between the base and cutting edge. The base and cutting edge are preferably made of a metallic material to facilitate easy welding.

[0024] In order to minimize manufacturing costs, the base and the at least one cutting edge can be made from different metal strips. According to the invention, the metal strip from which the base is made has a lower hardness than the metal strip from which the cutting edge is made. If a cutting edge is arranged on the base, the blade can be made in a particularly simple manner from a bimetallic strip. Such a bimetallic strip consists of two interconnected metal strips, wherein the two metal strips are made from different materials. If the base has two cutting edges, in particular one cutting edge on each long side of the base, the blade can preferably be made from a trimetallic strip. The trimetallic strip is joined together from three metal strips, wherein the materials of at least two metal strips differ.Preferably, such a tri-metal band has two outer sections which can form the cutting edge and a central section which is less hard than the outer sections and can form the base.

[0025] Within the scope of the invention, it was recognized that the corners of the blade, which are formed at the joint between the long side and the end of the blade, can be extremely fragile. In order to optimize the fracture behavior of the blade, at least one long side of the blade can be connected to an end of the blade by a curve and / or bevel. In other words, this means that the long side and end of the blade do not form any corners, in particular no right-angled corners, but are separated by the bevel or curve. Preferably, each connection between the long side and end of the blade is made by a curve and / or bevel. More preferably, the blade has four bevels or four curves. By forming curves and / or bevels on the blade according to the invention, the fracture sensitivity of the blade can be reduced and breakage of one or more corners of the blade can be prevented.This also prevents undesirable disruption of the blade's balance during operation due to broken corners. A disruption of the blade's balance creates an imbalance in the mower, which negatively impacts smooth running and the bearing elements. Since the inventive design of the blade prevents breakage at the corners of the blade, imbalance in the mower can also be prevented, thereby advantageously maintaining smooth running and minimizing wear on the mower, particularly on the mower's bearing elements. The bevels of the blade can be produced, for example, by defined and uniform breaking of a rectangular blade.

[0026] In order to make the blade as robust as possible, the blade can have an octagonal shape. The octagonal shape of the blade is preferably designed such that the long sides of the blade are arranged opposite one another, running parallel to one another, and the end sides of the blade are also arranged opposite one another and parallel to one another. The sides of the blade connecting the long sides and the end sides can be referred to as bevel sides within the scope of the invention, wherein the length of the bevel side, according to a particularly preferred embodiment, is shorter than the length of the end side and shorter than the length of the long side of the blade. This advantageously reduces or eliminates the susceptibility of the blade to breakage, in particular the corners that are formed between the adjacent long sides and end sides when the blade is of rectangular design.

[0027] Both the front side of the blade and the bevel side as well as the long side of the blade and the bevel side can be at an acute angle to each other, which means that the formation of right-angled corners can be avoided and the service life of the blade can be significantly increased, as well as avoiding the disadvantages of a disturbed balance position of the blade on the mower.

[0028] In a second aspect, the invention relates to a blade system comprising a blade according to the invention as well as a fastening element and a fastening means, wherein the fastening element and / or the fastening means can pass through the blade for fastening the blade to a holding element of a mower.

[0029] The fastening means can be fixed to a retaining element of the mower, thus securing the blade to the mower in the desired position. The fastening element can serve to protect the blade and fastening means. The fastening means can be designed as a bolt, screw, pin, rivet, or clamp. The fastening element is preferably arranged between the blade, in particular the base of the blade, and the fastening means. The combination of fastening means, fastening element, and blade according to the invention thus allows for low-wear use of the blade and the fastening means, as well as for secure positioning and fastening of the blade to a mower.

[0030] The fastening means and / or the base can have a lower degree of hardness than the fastening element. In other words, the fastening element can be harder than the fastening means and / or the base. Thus, if the fastening element is arranged between the base and the fastening means, the fastening element can reduce wear on the base of the blade and the fastening means because direct contact between the base and the fastening means is prevented. In blade systems known from the prior art, the fastening means is generally considered a wearing part and must be replaced regularly. Within the scope of the invention, it was recognized that a fastening element, in particular a fastening element that has a higher degree of hardness than the base and / or the fastening means, significantly increases the service life of the fastening means and / or the blade.

[0031] If the fastener has been hardened, its wear can be reduced to such an extent that replacement is advantageously unnecessary. If the fastener is cylindrical, for example, as a spacer sleeve, a clearance fit can be provided between the fastener and the recess in the blade. It is also conceivable to have a sliding fit between the fastener and the recess in the blade. The fastener can have a height that is greater than the thickness of the blade.

[0032] The fastening element can at least partially, preferably completely, encompass the fastening means. In particular, if the fastening means is rotationally symmetrical, the fastening element can also be rotationally symmetrical and encompass the fastening means to ensure reliable protection of the fastening means. According to a preferred embodiment, both the fastening element and the fastening means extend through the blade, with the fastening element completely encompassing at least a portion of the fastening means running along the longitudinal axis of the fastening means, for example, a portion of the shank of a screw.

[0033] In order to enable the blade system to be installed as easily as possible, the fastening element can have a minimum inner diameter that is larger than the outer diameter of the fastening means, such that the fastening means can be at least partially inserted into the fastening element. The fastening means can preferably be pushed through the fastening element to a desired depth in order to engage the mower or the holding element of the mower. For example, if the fastening means is designed as a screw, it is conceivable that the fastening means is pushed into the fastening element until the screw head comes into contact with the fastening element. According to a further preferred embodiment, the fastening element can be pushed into a recess in the blade, and the fastening means can be pushed into the fastening element.

[0034] It has proven advantageous if the blade is freely movable radially and / or axially relative to the fastening means and / or the fastening element. In other words, after the blade is attached to the retaining element of a mower, it can be rotated relative to the fastening means and / or fastening element and / or moved along the recess, which is preferably penetrated by the fastening element and the fastening means. This significantly reduces wear and increases the service life of the blade.

[0035] The fastening element can be a spacer bushing. Preferably, the fastening element is a hardened spacer bushing. More preferably, the spacer bushing is designed as an open hollow cylinder. This geometric configuration allows the spacer bushing to easily encompass a rotationally symmetrical fastening element, at least in sections, and reliably protect it.

[0036] The fastening element can be manufactured using a stamping and / or bending process. Preferably, the fastening element, particularly if it is designed as a spacer sleeve, can be manufactured from a sheet metal strip using a cost-effective stamping process. The fastening element can be tempered and / or hardened after production. It is also conceivable for the fastening element to be made of tempered steel.

[0037] In order to provide the blade system with particularly little effort and cost-effectively, the fastening means can be a screw, in particular a standard screw. Preferably, the fastening means can be a standard screw without a collar or shoulder. Because the fastening means is protected by the fastening element, special requirements are no longer placed on the fastening means. Therefore, the fastening means can also be a standard screw in a particularly simple manner and does not have to be a specially designed and complex to manufacture collar screw, as is known from the prior art. In this case, a cost comparison can be such that the fastening element and the fastening means designed as a standard screw together are cheaper to manufacture or purchase than the generic collar screw. This not only increases the service life of the blade system, but also achieves an economic advantage.

[0038] The blade can be arranged on the fastening element in such a way that, when the blade is fixed to the holding element, the blade can be rotated about the fastening element and / or displaced relative to the fastening element. According to a preferred embodiment, the fastening element, preferably a spacer sleeve, can be designed to receive a fastening means, preferably a screw. For this purpose, the fastening element can have an internal thread that can engage with an external thread of the fastening means in order to fasten the blade to the holding element of the mower. According to this embodiment, the fastening means can also be designed as a screw without a collar.The fastening element can be fixed immovably to the mower due to the connection via its internal thread with the external thread of the fastening means fixed to the holding element of the mower, so that the blade can rotate around the fastening element and / or can be moved relative to the fastening element.

[0039] The mower according to the invention, with a holding element, has at least one blade according to the invention and / or one blade system according to the invention.

[0040] The lawn mower according to the invention has a blade according to the invention and / or a blade system according to the invention and / or a mowing mechanism according to the invention.

[0041] In a further aspect, the invention relates to a brush cutter having a blade according to the invention and / or a blade system according to the invention and / or a mowing mechanism according to the invention.

[0042] It is understood that the embodiments and examples mentioned above and those to be explained below can be implemented not only individually, but also in any combination with one another without departing from the scope of the present invention. It is also understood that the embodiments and examples mentioned above and those to be explained below relate to the method according to the invention in an equivalent or at least similar manner, without being mentioned separately for this purpose.

[0043] Embodiments of the invention are shown schematically in the drawings and are explained below by way of example.

[0044] Preferred embodiments are described in the Fig. 1 to 6 shown.

[0045] It shows Fig. 1 shows a first embodiment of a blade according to the invention in plan view; Fig. 2 the blade according to the invention according to Fig. 1 in cross section; Fig. 3 a second embodiment of a blade according to the invention in plan view; Fig. 4 a third embodiment of a blade according to the invention in plan view; Fig. 5 a blade system according to the invention in sectional view; and Fig. 6 a mower with the blade system according to Fig. 5 in sectional view.

[0046] Fig. 1 shows a top view of a blade 01 according to the invention, comprising a base 02 and cutting edges 03 and 04 arranged laterally of the base 02. The cutting edges 03, 04 are arranged on the longitudinal sides LB1, LB2 of the base and form the longitudinal sides L1, L2 of the blade 01. The corners enclosed by the longitudinal sides L1 and L2 and the end faces S1 and S2 are chamfered and thus have a bevel 05. The blade 01 thus has an octagonal shape in top view. The bevel sides 51 formed by the bevels are each at an acute angle to an end face S1, S2 of the blade or to an end face SB1, SB2 of the base. The acute angle is illustrated by way of example on two bevel sides 51 using angles β1 and β2. To attach the blade 01, for example to a mower not shown here, two recesses 06, which are designed as bores, are made in the base 02 of the blade 01.

[0047] Fig. 2 shows the blade 01 according to the Fig. 1 in cross-section. Again, the base 02 and the cutting edges 03 and 04 arranged laterally of the base 02 can be seen. The recesses 06 serving to attach the blade 01 to a mower (not shown) extend through the base 02. The cutting edges 03, 04 have a two-sided cutting angle. This is indicated schematically by the cutting angles α1 and α2. The base 02, which is arranged between the cutting edges 03 and 04, has a lower degree of hardness than the cutting edges 03 and 04.

[0048] Also Fig. Figure 3 shows a blade 01 according to the invention with two recesses 06 designed as bores for attaching the blade 01 to a mower (not shown). The base 02, which is arranged between the cutting edges 03 and 04, has a lower degree of hardness than the cutting edges 03 and 04. To reduce the risk of breakage of the blade 01, in particular of the cutting edges 03 and 04, in the event of unintentional contact with an object, the blade 01 according to the invention has a bevel 05 at each of the points where the longitudinal sides of the blade L1 and L2 meet the end faces of the blade S1 and S2.

[0049] Fig. 4 shows a further embodiment of a blade 01. Essentially, the blade 01 is according to Fig. 4 identical to the blades 01 according to the Fig. 1 to 3, wherein the recess 06 is different from the recesses 06 of the blades 01 according to the Fig. 1 to 3. The recess 06 according to Fig. 4 is designed in the manner of a slot or oblong hole and has a curved shape. It can be seen that the recess 06 extends along the curve 07, which is preferably sinusoidal. The slot-shaped recess 06 does not extend continuously parallel to the central axis M, but is partially offset from the central axis M of the blade 01, since the recess 06 extends along a sinusoidal curve 07. It can be seen that the inflection point of the sinusoidal curve 07 lies on the central axis M, which in this case coincides with the axis of symmetry of the blade 01. The recess 06 terminates at its ends in a semicircle. These ends of the recess 06 are arranged symmetrically offset from the central axis M of the blade 01.

[0050] Fig. Figure 5 shows a blade system 10 comprising a blade 01, a fastening element 11, and a fastening means 12, wherein the fastening means is designed as a screw 13. The screw 13 extends through the fastening element 11, which is designed as a spacer sleeve, and can engage with its threaded portion 14 and / or shaft into a bore not shown here, for example, in a retaining element of a mower. The fastening element 11, in turn, extends through the blade 01 within the recess 06. For this purpose, the fastening element 11 has an inner diameter D i which is larger than the outer diameter of the threaded portion 14 and / or the shank of the screw 13, and an outer diameter D awhich is smaller than the inner diameter of the recess 06. Fastening element 11 and blade 01 are arranged relative to one another in such a way that when the blade 01 is fastened to a mower, the blade 01 continues to be freely rotatable about the fastening means 12 or displaceable relative to the fastening means 12. The blade 01 has a base 02 into which the recess 06 is made. The cutting edges 03 and 04 with their respective cutting edges 08 are arranged to the side of the base 02. The blade 01 has a constant thickness s in the area of ​​the base 02. According to Fig. 5, the blade 01, in particular the cutting edges 03 and 04, has a one-sided cutting angle α1.

[0051] With Fig.6 shows a mower 20 according to the invention, comprising a blade system 10 with a blade 01 according to the invention. The fastening element 11, designed as a spacer sleeve, passes through the blade 01 and is itself passed through by the fastening means 12, designed as a screw 13. To fasten the blade 01 to a holding element 23 of the mower 20, the screw 13 engages with its thread 14 in a bore 21 of the holding element 23 of the mower 20, wherein the external thread 14 of the screw 13 cooperates with an internal thread 22 of the bore 21 to secure the blade 01. The blade 01 is, as previously described, constructed from a base 02 having a lower degree of hardness and cutting edges 03 and 04 having a higher degree of hardness than the base 02. The fastening element 11, which in this case is designed as a spacer sleeve, can have a higher degree of hardness than the base 02 and / or than the screw 13.

Claims

[1] Blade (01) comprising a base (02) and at least one cutting edge (03, 04) arranged on one side (SB1, SB2, LB1, LB2) of the base (02) and connected to the base (02), wherein the cutting edge (03, 04) has a first degree of hardness and the base (02) has a second degree of hardness, wherein the first degree of hardness of the cutting edge (03, 04) is greater than the second degree of hardness of the base (02), and wherein a slot-shaped recess (06) extending through the blade (01) is introduced into the base (02), the recess (06) extending along a sinusoidal curve (07). [2] Blade according to claim 1, characterized by that the cutting edges (03, 04) form at least two opposite sides (S1, S2, L1, L2) of the blade (01). [3] Blade according to claim 1 or 2, characterized by that the base (02) and the at least one cutting edge (03, 04) are welded together. [4] Blade according to one of claims 1 to 3, characterized bythat the base (02) and the at least one cutting edge (03, 04) are made of different metal strips. [5] Blade according to one of claims 1 to 4, characterized by that at least one longitudinal side (L1, L2) of the blade (01) is connected to an end face (S1, S2) of the blade (01) by a rounding and / or bevel (05). [6] Blade according to one of claims 1 to 5, characterized by that the blade (01) has an octagonal shape. [7] Blade system (10) comprising a blade (01) according to one of claims 1 to 6 and a fastening element (11) and a fastening means (12), wherein the fastening element (11) and / or the fastening means (12) pass through the blade (01) for fastening the blade (01) to a holding element (23) of the mower (20). [8] Blade system according to claim 7, characterized bythat the fastening means (12) and / or the base (02) have a lower degree of hardness than the fastening element (11). [9] Blade system according to claim 7 or 8, characterized by that the fastening element (11) engages around the fastening means (12). [10] Blade system according to one of claims 7 to 9, characterized by that the fastening element (11) has a minimum inner diameter which is larger than the outer diameter of the fastening means (12), so that the fastening means (12) can be at least partially inserted into the fastening element (11). [11] Blade system according to one of claims 7 to 10, characterized by that the blade (01) is freely movable radially and / or axially relative to the fastening means (12) and / or the fastening element (11). [12] Blade system according to one of claims 7 to 11, characterized by that the fastening element (11) is a spacer bushing. [13] Blade system according to one of claims 7 to 12, characterized by that the fastening means (12) is a screw (13), in particular a standard screw. [14] Blade system according to one of claims 7 to 13, characterized by that the blade (01) is arranged on the fastening element (11) in such a way that the blade (01) is rotatable about the fastening element (11) and / or displaceable relative to the fastening element (11) when the blade (01) is fixed locally on the holding element (23). [15] Mower (20) with a holding element (23) comprising a blade (01) according to one of claims 1 to 6 and / or a blade system (10) according to one of claims 7 to 14. [16] Lawn mower (30) with a blade (01) according to one of claims 1 to 6 and / or a blade system (10) according to one of claims 7 to 14 and / or a mowing mechanism (20) according to claim 15. [17] Brush cutter (40) with a blade (01) according to one of claims 1 to 6 and / or a blade system (10) according to one of claims 7 to 14 and / or a mower (20) according to claim 15.

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