Double knife mower

Abstract

A double-knife mower (1, 19) comprising an upper blade (3, 20), a lower blade (4, 21), an upper blade guide arm (5, 29), a lower blade guide arm (16, 30), a blade bar (7, 24) and a machine connection (11), wherein the machine connection (11) is configured to attach the double-knife mower (1, 19) to a machine, wherein the blade bar (7, 24) has bearings, wherein the upper blade (3, 20) is movably mounted on the blade bar (7, 24) by means of the upper blade guide arm (5, 29) through the bearings (6, 31, 32) of the blade bar (7, 24), wherein the lower blade (4, 21) is movably mounted on the blade bar (7, 24) by means of the lower blade guide arm (16, 30) through the bearings (6, 31, 32) of the blade bar (7, 24). is mounted on the knife rail (7, 24), wherein the knife rail (7, 24) has a strip (8, 25) with a top surface, wherein the bearings (6, 31, 32) are located on a bottom surface of the strip, the bottom surface being spaced apart from the top surface of the knife rail (7, 24),wherein the upper surface of the cutter bar (7, 24) is designed to be flat, so that a transverse transport of cut straw material is possible without obstruction.

Description

State of the art

[0001] Double-blade mowers are common. In conventional double-blade mowers, the upper blade is mounted movably above a bar of the double-blade mower, and a lower blade is mounted below the bar. This creates raised areas on the upper side of the bar that can impede the transport of cut stalks. Object and advantages of the invention

[0002] The object of the present invention is to provide an improved double-blade mower, in particular to provide a double-blade mower in which the transport of cut grass is improved.

[0003] The problem is solved by the independent claims. The dependent claims mention exemplary embodiments of the invention.

[0004] Currently, mowing embankments and ditches presents various problems depending on the equipment used. Firstly, damage to the embankments and ditches occurs when mowing with a relatively heavy mower, which compacts the subsoil of the embankments and ditches to such an extent that the plant root system is destroyed, causing cracks in the embankments and ditches and causing them to collapse. Secondly, mowing ditches and embankments from the side, for example, is detrimental, as the mown grass is left to rot. This causes the grass to form fertilizer for future plants, which in turn is detrimental to subsequent mowing operations.

[0005] In this case, a double-blade mower is proposed, which on the one hand makes mowing of moors, dams and ditches easier and on the other hand enables the lateral removal of the stalks.

[0006] The invention relates to a double-blade mower having an upper blade, a lower blade, an upper blade guide arm, a lower blade guide arm, a blade rail and a machine connection, wherein the machine connection is designed to arrange the double-blade mower on a machine, wherein the blade rail has bearing elements, wherein the upper blade is movably mounted on the blade rail by means of the upper blade guide arm through bearings of the blade rail, wherein the lower blade is movably mounted on the blade rail by means of the lower blade guide arm through bearings of the blade rail, wherein the blade rail has a bar with an upper side, wherein the bearings are provided on an underside of the bar, wherein the underside is spaced from the upper side of the blade rail, wherein the upper side of the blade rail is flat, so that transverse transport of cut stalks is possible without disruption.

[0007] This allows for the cut stalks to be removed sideways, which in turn avoids having to drive over the area to be mowed and also allows for the collection of the cut stalks. In particular, this allows for the cut stalks to be removed sideways without touching the ground and having to be transported further by the ground.

[0008] For example, the upper knife guide arm is L-shaped or double-L-shaped. It is conceivable that the upper knife guide arm engages the upper knife with a first end on an upper side of the upper knife. It is conceivable that an underside of the upper knife is movably mounted on an upper side of the lower knife. It is conceivable that a second end of the upper knife guide arm and a second end of the lower knife guide arm are aligned in a plane. For example, the upper knife guide arm and the lower knife guide arm are mounted with their respective second ends on the bearing.

[0009] It is also suggested that the top of the knife rail be flat. This makes removal easier.

[0010] It is also proposed that the bearings of the knife rail be attached to the bar, with the bar having recesses on the upper side in which fastening means for securing the bearings are arranged, so that the upper side of the bar is flat. This makes it possible to create a knife rail that has no upwardly protruding projections on the upper side, e.g., screw heads, rivets, or nuts.

[0011] It is also proposed that the double-blade mower have a belt rake, wherein the belt rake is arranged above the blade bar, wherein the belt rake is provided in such a way that transport tines of the belt rake can be guided along the longitudinal extent of the blade bar on the upper side of the bar, thus enabling transverse transport of cut stalks along the longitudinal extent of the blade bar. The belt rake enables lateral removal of the cut stalks. The belt rake enables removal of the cut stalks directly after cutting by the upper and lower blades, so that the cut stalks do not come to rest on the mown ground behind the blades.

[0012] For example, the belt rake is movably connected to the knife rail by means of a folding mechanism.

[0013] It is further proposed that the double-blade mower have a sliding shoe in which the bearings are arranged, the sliding shoe having a bottom surface that slides over the area to be mowed during operation of the double-blade mower. For example, the sliding shoe has a level or flat bottom surface. This prevents snagging with stalks or plants in the area to be mowed.

[0014] It is also proposed to include a sliding plate, which fits flush with the top of the blade bar, so that the top of the blade bar and the top of the bar form a flat surface. This enlarges the flat surface, facilitating the removal of the cut stalks.

[0015] It is also proposed that the upper blade and the lower blade have a blade drive pin at one end, by means of which the upper blade and the lower blade are movable relative to each other. For example, the blade rail extends in a longitudinal direction from one end of the blade rail to another end of the blade rail. For example, the upper blade and the lower blade are movable along the longitudinal direction.

[0016] It is also proposed that a drive be provided that is connected to the knife drive pin of the upper knife and the lower knife, with the drive moving the upper knife and the lower knife via the knife drive pins. For example, the drive is arranged at one end of the knife rail.

[0017] A working machine is also proposed which has a double-blade mower according to one of the previously mentioned embodiments.

[0018] Several embodiments are explained in more detail with reference to the following drawings, giving further details and advantages.

[0019] They show: Fig. 1 a perspective view of a double-blade mower with a belt rake from the side at the rear and above, Fig. 2 the double-blade mower according to Fig. 1 in a rear view, Fig. 3 the double-blade mower according to Fig. 1 in a view from above, Fig. 4 the double-blade mower according to Fig. 1 in a side view, Fig. 5 a section of another variant of a double-blade mower from the rear, Fig. 6 a top view of the section of the double blade mower according to Fig. 5, Fig. 7 the sectional view BB according to Fig. 6 and Fig. 8 the sectional view AA according to Fig. 6.

[0020] Fig. 1 to 4 show a double-blade mower 1 with a belt rake 2. The double-blade mower 1 has an upper blade 3 and a lower blade 4. The upper blade 3 is movably mounted on a blade rail 7 by means of an upper blade guide arm 5 on a bearing 6. The lower blade 4 is movably mounted on a blade rail 7 by means of a lower blade guide arm 5 on a bearing 6. The blade rail 7 has a bar 8 with an upper side 9.

[0021] The belt rake 2 has transport tines 10.

[0022] The double-blade mower 1 further comprises a machine connection 11. The double-blade mower 1 extends from a first end 12 along its longitudinal axis to a second end 13. For example, a drive 14 for driving the upper blade 3 and the lower blade 4 is provided at the second end 13.

[0023] For example, there are recesses 15 on the top side 9 of the strip 8.

[0024] For example, the double-blade mower 1 has a sliding shoe 16, wherein the sliding shoe 17 has an underside 18.

[0025] In the Fig. 5 to 8 shows a section of a double-blade mower 19. The double-blade mower 19 could also be part of the double-blade mower 1 according to Fig. 1 to 4.

[0026] In Fig. 5 the double blade mower 19 is shown from behind and in Fig. 6 from above. Shown are an upper blade 20 and a lower blade 21, which have a blade drive pin 22, 23 on one side. Furthermore, a blade rail 24 is shown, which has a bar 25 and a sliding plate 26. The blade rail 24 is in the Fig. 5 and Fig. 6 is shown only in part. The knife rail 24 can extend along the entire length of the upper knife 20 or the lower knife 21.

[0027] In Fig. 6, the cross section BB is according to Fig. 5 and in Fig. 7 the cross section AA according to Fig. 5.

[0028] In the Fig. 6 and Fig. 7 shows that a surface 27 of the strip 25 and a surface 28 of the sliding plate 26 are flush and planar. Fig. 6 and Fig. 7 shows that the upper knife guide arm 29 and the lower knife guide arm 30 are movably mounted below the knife rail 24 on a bearing 31, 32. For example, the bearings 31, 32 are enclosed by a sliding shoe 33. List of reference symbols 1 double-blade mower 2 belt rakes 3 upper blades 4 lower blades 5 upper knife guide arm 6 warehouses 7 Knife rail 8 bar 9 Top 10 transport tines 11 Machine connection 12 End 13 End 14 Drive 15 Deepening 16 Lower knife guide arm 17 Sliding shoe 18 Bottom 19 Double-blade mower 20 upper blades 21 lower blades 22 blade drive bolts 23 blade drive bolts 24 knife rail 25 bar 26 sliding plate 27 Surface 28 Surface 29 Upper knife guide arm 30 Lower knife guide arm 31 warehouses 32 warehouses 33 sliding shoe

Claims

[1] Double-blade mower (1, 19) comprising an upper blade (3, 20), a lower blade (4, 21), an upper blade guide arm (5, 29), a lower blade guide arm (16, 30), a blade rail (7, 24) and a machine connection (11), wherein the machine connection (11) is designed to arrange the double-blade mower (1, 19) on a machine, wherein the blade rail (7, 24) has bearings, wherein the upper blade (3, 20) is movably mounted on the blade rail (7, 24) by means of the upper blade guide arm (5, 29) through the bearings (6, 31, 32) of the blade rail (7, 24), wherein the lower blade (4, 21) is movably mounted on the blade rail (7, 24) by means of the lower blade guide arm (16, 30) through the bearings (6, 31, 32) of the blade rail (7, 24) is movably mounted on the knife rail (7, 24), wherein the knife rail (7, 24) has a bar (8, 25) with an upper side, wherein the bearings (6, 31, 32) are provided on an underside of the bar, wherein the underside is spaced from the upper side of the knife rail (7, 24),wherein the upper side of the knife rail (7, 24) is flat, so that a transverse transport of cut stalk material is possible without interference., [2] Double-blade mower (1, 19) according to the preceding claim 1, characterized by that the upper side of the bar (8, 25) of the knife rail (7, 24) has no elevation. [3] Double-blade mower (1, 19) according to one of the preceding claims, characterized by that the bearings of the knife rail (7, 24) are fastened to the bar (8, 25), the bar (8, 25) having for this purpose recesses (15) on the upper side (8) in which fastening means for fastening the bearings (6, 31, 32) are arranged, so that the upper side of the bar (8, 25) is flat. [4] Double-blade mower (1, 19) according to one of the preceding claims, characterized byin that the double-blade mower (1, 19) has a belt rake (2), wherein the belt rake (2) is arranged above the blade rail (7, 24), wherein the belt rake (2) is provided in such a way that transport tines (10) of the belt rake (2) can be guided along the longitudinal extent of the blade rail (7, 24) on the upper side of the bar, so that a transverse transport of cut stalk material along the longitudinal extent of the blade rail (7, 24) is possible. [5] Double-blade mower (1, 19) according to one of the preceding claims, characterized by that the double-blade mower (1, 19) has a sliding shoe (17) in which the bearings are arranged, wherein the sliding shoe (17) has an underside which slides over the area to be mowed during operation of the double-blade mower (1, 19). [6] Double-blade mower (1, 19) according to one of the preceding claims, characterized bythat a sliding plate (26) is provided, wherein the sliding plate (26) is flush with the upper side of the bar of the knife rail (7, 24), so that the upper side of the knife rail (7, 24) together with the upper side of the bar forms a flat surface. [7] Double-blade mower (1, 19) according to one of the preceding claims, characterized by that the upper blade (3, 20) and the lower blade (4, 21) have at one end a blade drive bolt (22, 23) by means of which the upper blade (3, 20) and the lower blade (4, 21) are movable relative to one another. [8] Double-blade mower (1, 19) according to one of the preceding claims, characterized by that a drive (14) is provided which is connected to the knife drive bolt of the upper knife (3, 20) and the lower knife (4, 21), wherein the drive moves the upper knife (3, 20) and the lower knife (4, 21) via the knife drive bolts. [9] Working machine with a double-blade mower (1, 19) according to one of the preceding claims.

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