Harvester with double blade system and movable sliding surface.

Abstract

"harvester with double knife system and movable sliding surface". The present invention relates to a harvester (2) for attachment to a combine harvester.To reduce harvest losses in the knife bar region, it is proposed that a double knife cutting system (11) be configured on the knife bar (6), in which a first part of the knife blades (18a) present in the harvester (2) is fixed to a first knife back (20a), this first part of the knife blades (18a) together with the first knife back (20a) forms the upper knife (22), and a second part of the knife blades (18b) present in the harvester (2) is fixed to a second knife back (20b), this second part of the knife blades (18b) together with the second knife back (20b) forms the lower knife (24); the upper knife (22) and the lower knife (24) are actuated in opposite directions and the sliding surface (14) is configured as a ruler (16) that is fixedly connected to the upper knife (22).

Description

1 / 19 Harvester with double blade system and movable sliding surface.

[001] The present invention relates to a harvester for attachment to a combine harvester, with a frame, a knife bar, a deposition area for depositing the cut stalk, conveyor devices for unloading the cut stalk, drive devices for driving the knife bar and conveyor devices, and a sliding surface inclined obliquely in the direction of transport of the harvested product in the transition region from the knife bar to the deposition area.

[002] A harvester of this type is known through document DE 10 2015 110 746 A1. There, a Draper harvester is revealed, whose deposition area is configured on the respective side pointing upwards of several conveyor belts driven in a circulating manner. The harvester is provided with a knife bar, in which fixed knife blades mounted on the knife bar interact with knife blades, which are incorporated into a lifting bar arranged transversely to the working direction of the harvester, this lifting bar being driven with oscillatory mobility in the extension direction.Due to contact between the stalks and / or branches of the harvested product and parts of the combine harvester, such as stalk dividers, the knife bar, the collection reel, or other components, it can happen that in very ripe and dry fruits with stalks, grains detach from the fruit branches and fall to the ground before they can be captured by the deposition area. These grains located on the ground can no longer be collected for the harvested product flow and are lost as harvest yield. It also happens that grains do fall onto the deposition area, but fall from the front of the deposition area onto the ground and, because of this, are also lost as yield. Petition 870260047066, dated 05 / 18 / 2026, page 29 / 57 2 / 19 of harvest. It can also happen that the cut stalk is actually deposited cleanly on the deposition area, but that grains are released and fall forward from the harvester. Finally, fruits are also harvested as stalks that grow in pods, such as legumes like soybeans or rapeseed. During harvesting, especially during cutting and subsequent deposition and transport of the cut harvest product onto the conveyor belt device, the pods burst and, as a result, the grains are thrown around. Also due to this, it is possible that grains from the conveyor belt device fall as harvest product onto the cultivated soil and are lost as harvest yield.

[003] To reduce grain losses in the knife bar region, document DE 10 2015 110 746 A1 proposes that in the transition region from the knife bar to the deposition area, a sliding surface be configured, designed obliquely in the direction of transport of the harvested product, and that air outlet openings be provided in the sliding surface, from which an upward-directed air current emerges, capturing falling grains and blowing them to the deposition area. However, the working results of this solution, under particularly difficult harvesting conditions, appear to still be susceptible to improvement.

[004] Document DE 10 2018 119 326 B3 describes a double knife cutting system in which not only one lifting bar with the knife blades fixed thereto is used, but two lifting bars which together with the knife blades fixed thereto form an upper knife and a lower knife. The upper knife and the lower knife are operated with mobility in opposite directions.

[005] The objective of the present invention is to improve grain losses in the transition region between the knife bar and the deposition area. Petition 870260047066, dated 05 / 18 / 2026, page 30 / 57 3 / 19 situation even under particularly difficult harvesting conditions.

[006] This objective is achieved for a harvester of this type, insofar as the knife bar is configured with a double knife cutting system, in which a first part of the knife blades present in the harvester is fixed to a first knife back, this first part of the knife blades together with the first knife back forming the upper knife, and in which a second part of the knife blades present in the harvester is fixed to a second knife back, this second part of the knife blades together with the second knife back forming the lower knife; the upper knife and the lower knife are actuated in opposite directions, and the sliding surface is configured as a ruler that is fixedly connected to the upper knife.

[007] When using a double knife cutting system, it is possible to dispense with ear elevators and knife fingers, in which the lifting bar and the knife blades fixed therein are guided. Since in a double knife cutting system both the upper and lower knives are driven with oscillating mobility, their lifting strokes are shortened and the movement speeds are lower. This results in smoother operation of the cutting system, and this means that fewer grains are thrown out of the ears during the cutting of the harvested product. In addition, the cut itself is cleaner and smoother, causing the stalks of the harvest to be moved less.

[008] The knife blades of a double knife cutting system can also be mounted deeper into the combine harvester than the knife blades of a traditional cutting system with a single lifting bar, because in the double knife cutting system there is no need for ear lifters and knife fingers. The combine harvester itself can be moved closer to the ground, because the blades Petition 870260047066, dated 05 / 18 / 2026, p. 31 / 57 4 / 19 knife blades of a double knife cutting system clean themselves and do not become clogged with soil if they have contact with the ground. This results in a longer fall path for loose grains, which can lead to loose grains landing in the continuously moving deposition area under the cut crop during the combine's advance, and not on the cultivated soil, before the deposition area reaches the grain fall line.In the case of a half-stroke lifting system, if the movement speed of the upper and lower blades is greater than half the speed as in traditional cutting systems with an oscillating lifting bar, then harvesting with a combine harvester equipped with a double-blade cutting system will allow for faster movement than with a traditional combine harvester, without having to fear cutting losses. This causes the deposition area to move even faster under the falling grains, thus further reducing losses in the combine harvester.

[009] Furthermore, it is advantageous that the sliding surface configured as a ruler be fixedly attached to the upper knife, so that it moves along with the oscillating movements of the upper knife. During harvesting, the ruler, and therefore also the sliding surface, together with the upper knife, performs a shaking motion, whereby the harvested product falling onto the sliding surface, upon contact, also receives a movement impulse in the respective direction of movement of the upper knife. Because the upper knife moves very quickly, and in this case also at the lifting positions the speed of movement constantly decreases and accelerates again, and in this process also always changes the direction of movement, the harvested product that falls vibrates on the sliding surface and does not adhere to it. Since in this way the product of Petition 870260047066, dated 05 / 18 / 2026, page 32 / 575 / 19 The falling crop is kept floating away from the sliding surface, so it can be more easily dragged by the other cut crop that passes by, brushing against the sliding surface, and can be transported to the deposition area. Because of this, the sliding surface, which moves along with the top knife, also reduces grain losses from the combine harvester in the cutting system region. The ruler can extend in one piece across the entire working width of the combine harvester, although the ruler can also be divided into several parts that are placed in rows on the top knife. The top knife can also be segmented into parts, and it is possible to configure the segments of the top knife and the ruler parts with the same width.The screed can be specially sealed in relation to the upper knife and knife bar, the deposition area and / or in relation to adjacent screed parts in the case of a segmented screed, for example by means of a sealing layer of an elastomeric material, to reduce or completely prevent the passage of harvested product through the gaps and joints then sealed.

[0010] By combining a double-knife cutting system with a sliding surface that is immovably linked to the upper knife, it is possible to reduce grain losses in the harvester's cutting area, especially under difficult harvesting conditions. The cut harvest product adheres less to the sliding surface, flows more easily towards the deposition area, and is discharged better, as a whole, towards the harvester's deposition area.

[0011] The invention can be implemented both in Draper harvesters and in other harvesters with a rigid deposition area and conveyor devices that pass above it, such as, for example, a conveyor screw. As a conveyor device, a rotatably driven and height- and length-adjustable collection reel can be additionally provided in the harvester, the Petition 870260047066, dated 05 / 18 / 2026, p. 33 / 57 6 / 19 which is positioned above and over the knife bar and through which the cut harvested product is discharged towards the deposition area. The pickup reel stabilizes and attenuates the harvested product in its upper region when it is cut and pushes the cut harvested product towards the deposition area when the cut has occurred and, at that moment, the harvested product threatens to fall onto the cultivated soil. The sliding surface, moved forward continuously with the combine harvester towards the harvested product reservoir, simultaneously pushes the lower parts of the cut plants in the direction of the combine harvester's work, so that the harvested product tends, in a tumbling motion, towards the deposition area and will be deposited without cutting losses on the deposition area.Due to the vibration of the sliding surface, the harvested product does not adhere to it, so the transport impulse of the collection reel over the cut harvested product in the direction of the deposition area is not hindered by the sliding surface.

[0012] According to one configuration of the invention, the upper and lower blades, along their length in the extension direction, are retained at the free ends of several retaining arms connected to the frame, these retaining arms, with their free ends, being movable at different heights from one another. In this mode of attachment, the cutting system can flexibly adapt to an irregular ground profile, at least approximately, transversely along the working width of the harvester, insofar as the free ends of the retaining arms move up or down in the region of the corresponding retaining arm, according to the profile of the newly traversed cultivated ground surface, or remain in their current position in the case of a flat ground surface. The retaining arms can be supported on a Petition 870260047066, dated 05 / 18 / 2026, page 34 / 57 7 / 19 rotating bearing, for example at its ends on the frame side, or the retaining arms can be configured as leaf springs fixed to the frame, which allows corresponding spring movements at the free end of the leaf spring. In the case of movements of the free ends of the retaining arms, the upper and lower blade sections retained by a corresponding retaining arm, as well as the guide firmly attached to the upper blade, move along with the sliding surface up or down. In this way, in the case of stored grains or other harvested product to be cut close to the ground, it can be cut low and close to the ground satisfactorily, even if in some regions there are depressions or elevations in the ground within the working range of the combine harvester.Since the guide moves along with the upper blade, the sliding surface also follows the movements by which the upper and lower blades adapt to an uneven soil profile when the combine harvester is moved through cultivated soil during harvesting. In this case, especially the blade backs of the upper and lower blades are also configured in a sufficiently flexible way so that they can adapt according to the soil profile.

[0013] According to one embodiment of the invention, the deposition area is configured on the upward-pointing side of one or more circulating driven conveyor belts. In such a configuration of the harvester, it is particularly a Draper harvester, which is active in transporting across the entire surface of the upper sides of the conveyor belts. Since the circulating belts of the conveyor belts rotate around lateral redirecting rollers in an upper drum and a lower drum, they therefore have an inevitably higher structural height than, for example, a harvester hopper. Petition 870260047066, dated 05 / 18 / 2026, p. 35 / 57 8 / 19 molded sheet metal, therefore, in Draper harvesters like this one, it is particularly useful that a height displacement between the cutting system and the surface of the upper drum of the conveyor belt be overcome with a sliding surface that is configured in such a way that it causes the least possible grain loss.

[0014] According to one configuration of the invention, the ruler has a series of air outlet openings distributed transversely across the working width, which are directed upwards and / or towards the deposition area. Through the air outlet openings, an air current can exit that reaches the harvested product cut or thrown out of the ears and transports it towards the deposition area. The level of losses from the combine harvester can be reduced due to the air outlet openings.

[0015] According to one configuration of the invention, in the ruler, in the regions where the rocker arms are located, there are respectively molded covers that protect the rocker arms against the harvest product and against dirt. Because of this, the rocker arm joints are less subject to wear.

[0016] According to one embodiment of the invention, the harvester is configured in several parts and the ruler is configured as being flexible and / or divided at the points of stitching between the parts of the harvester. In the case of a multi-part harvester, the frame is not configured as a single, rigid piece, but rather it has several frame parts, which are configured as being movable relative to each other and which cover with their structural width only a sub-width of the total working width of the harvester. In this way, the frame parts individually can adapt better to a soil profile. If the ruler is configured as flexible and / or divided, at least at the points of stitching, then it will not obstruct the adaptive movements of the individual frame parts in a Petition 870260047066, dated 05 / 18 / 2026, page 36 / 57 9 / 19 alternating soil profile, although, nevertheless, it can also support at the stitching points a complete and safer transfer of the harvested product to the deposition area, without thereby significantly increasing the risk of grain loss in the transition region between the knife bar and the deposition area.

[0017] According to one embodiment of the invention, the upper and lower blades of the double-blade cutting system are linked by a drive with a gear by means of rocker arms, this gear being disposed in a location between the side walls of the harvester. Usually, the blade bars of a harvester are driven externally by means of a gear located in the region of the side walls. In the case of a central drive of the upper and lower blades of the double-blade cutting system, a more uniform force distribution of the drive force is obtained along the working range of the upper and lower blades on the harvester. The drive shafts and / or hydraulic hoses, through which the drive force from a drive source on the harvester side is conducted through the harvester to the gear, may be disposed near the center of the harvester.If they had to be driven to the outer sides of the harvester, then the frame would be overloaded with correspondingly high weights and leverage forces. This is avoided through the fairly centralized arrangement of the gearing. In this case, the gearing does not need to be geometrically arranged exactly in the center of the harvester; a lateral displacement relative to the center is possible. Several gears can also be provided, driving respectively a set of upper and lower blades that extend only over a portion of the harvester's working width. Thus, for example, for a 12 m wide harvester, there may be two gears, driving a set of blades respectively. Petition 870260047066, dated 05 / 18 / 2026, page 37 / 57 10 / 19 of upper and lower knives, 6 m wide, with the gears arranged, for example, in a position offset inwards by 3 m or 4 m from the side walls. It is also possible to have a first gear located at a point between the side walls, which drives only the upper knife, and a second gear located at another point between the side walls, which drives only the lower knife.

[0018] According to one embodiment of the invention, the motion output shafts for driving the rocker arms on the upper side of the gear are driven out of the gearbox and the rocker arms extend in a plane above the plane of the upper and lower blades from the motion output shafts in the direction of the upper and lower blades.Due to the arrangement of the drive linkage for the upper and lower blades above the plane of the upper and lower blades, the upper and lower blades can be mounted quite deep into the harvester under the blade bar; the harvester itself remains constructively quite flat below the plane of the upper and lower blades, so that the upper and lower blades can be driven close to the ground surface during harvesting; in this mounting position, the upper and lower blades are exposed to a lower risk of damage because the risk of collision with obstacles is reduced, and the flow of products is not obstructed by this mounting position because the rocker arms are constructed in a very compact form.

[0019] According to one configuration of the invention, the drive rod has a section of the motion output shaft up to the lower blade, a section in which the rocker arm surrounds the upper blade in certain regions. This section supports the upper blade backward, in a direction opposite to the direction of work, and thus retains the upper blades. Petition 870260047066, dated 05 / 18 / 2026, page 38 / 57 11 / 19 and lower, one on top of the other. In this case, the lower blade can be fixedly connected to the lower part of the enveloping section, so that, during the operation of the harvester, the lower blade moves in the same direction as the enveloping section, although the upper blade moves in the opposite direction, at least temporarily. The section can be configured in a ruler shape, so that the support and compression effect is established not only at specific points, but also along the length of the enveloping section.

[0020] According to one embodiment of the invention, the upper and lower blades are retained in rocker arms, which, between their axes of rotation on the harvester side and the axis of rotation by which they are connected to the upper or lower blade, have the same length as the rocker arms by which the upper and lower blades are connected to the gear. Due to the same length of the rocker arms used for driving and retaining the upper and lower blades, and due to the same radius with which the rocker arms rotate around their axes of rotation, the upper and lower blades move very smoothly. Bending forces on the upper and lower blades that may arise if rocker arms of different lengths are used are also avoided.

[0021] According to one embodiment of the invention, the rocker arms that retain the upper blade and the rocker arms that retain the lower blade are arranged with their respective axes of rotation concentrically with respect to each other on the side of the harvester over a support point. Respectively, a rocker arm for the upper blade and a rocker arm for the lower blade form a pair of rocker arms that are arranged concentrically with respect to each other. Several pairs of rocker arms or all pairs of rocker arms may be distributed across the width of the harvester and provided with axes of rotation arranged concentrically with respect to each other. Petition 870260047066, dated 05 / 18 / 2026, pp. 39 / 57 12 / 19 in relation to the other. The retention forces acting on the upper and lower blades do not differ because of this. In each position where the upper and lower blades are connected to the harvester, only one support point is needed to hold both rocker arms, thus reducing construction costs. According to a modular system, it is possible to use identical rocker arms to retain the upper and lower blades.

[0022] According to one embodiment of the invention, the rocker arms have at their ends, on the frame side and / or on the knife side, a damping element that forms restoring forces. The damping element can be, for example, a molded piece of an elastomeric material, such as natural or synthetic rubber, which absorbs force peaks, especially at the extreme positions of the respective rocker arm, and then discharges the restoring forces formed in this process when the rocker arm moves again in the opposite direction. Because of this, the double-knife cutting system is smoother in its operation and more durable, and the risk of damage from foreign bodies that become lodged between the knife blades is lower because force peaks are absorbed by the damping elements. Instead of a damping element made of an elastomeric material, metal springs can also be used as the damping element.

[0023] According to one configuration of the invention, the knife blades are arranged with a different distribution of blades on the upper and lower knives. Due to the different distances between the blades arranged on the upper and lower knives, the force peaks that arise through a respective cut at an interface between the knife blades are distributed through a gear rotation over several angular degrees of a rotation, such that at one angular degree a greater quantity or all of the peaks are not added. Petition 870260047066, dated 05 / 18 / 2026, pp. 40 / 57 13 / 19 force arising from the cuts in the pairs of knives. Because of this, the drive rod is spared, being exposed to less force and operating more smoothly.

[0024] Other features of the invention are derived from the claims, figures and descriptions of the figures. All features and combinations of features mentioned above in the descriptive part, as well as the features and combinations of features mentioned below in the descriptions of the figures and / or only shown in the figures, can be employed not only in the respective combination indicated, but also in other combinations or, however, separately.

[0025] The invention will now be explained in detail based on a preferred embodiment, as well as taking the corresponding drawings as a reference.

[0026] Shown: Figure 1: A view of a combine harvester from an angled front view; Figure 2: an enlarged cutaway view of the double knife cutting system; Figure 3: the upper and lower blades retained at the free ends of several retaining arms connected to the frame; Figure 4: an enlarged view of the knife bar region, in which a gear is located; Figure 5: A cross-sectional view through the knife bar region.

[0027] Figure 1 shows a view of a harvester 2 from an inclined front view. The harvester 2 is made up of several parts with a central part and two lateral parts pivoting in relation to it and has a frame 4 to which the knife bar 6 is connected. The harvested product cut by the knife bar Petition 870260047066, dated 05 / 18 / 2026, pp. 41 / 57 14 / 19 knives 6 is deposited on a deposition area 8 and is transported out by means of one or more conveyor devices 10.

[0028] In this example of implementation, the deposition area 8 is located on three conveyor belts 12a, 12b, 12c in total, of which the two side conveyor belts 12a, 12c transport, during the harvesting work, the cut and deposited harvested product from the outside to the inside to the central conveyor belt 12b, and this transports the harvested product deposited on it backwards towards the inclined conveyor of a combine harvester connected to the harvester 2. Through their operation, the conveyor belts 12 not only form the deposition area 8, but are also, at the same time, transporting devices 10. An example of another transporting device 10 is represented by the pickup reel, which is rotatably operated by means of and above the knife bar 6.During harvesting, it plunges its picking reel teeth into the grain stock and moves the cut grain towards the deposition area 8. The harvester 2 has a drive device, through which a drive force is transmitted to the double knife cutting system 11 with the upper knife 22 and the lower knife 24 and to the conveyor devices 10. At the lateral ends of the harvester 2 are the side walls 36, which, at the same time, define the working width of the harvester 2.

[0029] Figure 2 shows an enlarged cutaway view of the double knife cutting system 11, which is located in the region of the knife bar 6. In the double knife cutting system 11, a first part of the knife blades 18a present in the harvester 2 is fixed to a first knife back 20a, and this first part of the knife blades 18a, together with the first knife back 20a, forms the upper knife 22, and a second part of the knife blades 18b forms Petition 870260047066, dated 05 / 18 / 2026, pp. 42 / 57 15 / 19 teeth on the harvester 2 is fixed to a second knife back 20b, this second part of the knife blades 18b, together with the second knife back 20b, forming the lower knife 24. The upper knife 22 and lower knife 24 are actuated in opposite directions, such that in the region of the cutting edges moved one above the other of the knife blades 18a, 18b a type of cut like scissors is obtained, by means of which the stalks of the harvested product are cut.

[0030] In the transition region of the double knife cutting system to the deposition area 8, a sliding surface 14 is configured in the harvester 2. The sliding surface 14 guides the harvested product along the height and / or length difference between the upper and lower knives 22, 24 and the deposition area 8. The sliding surface 14 is configured as a ruler 16, which is fixedly connected to the upper knife 22. When the upper knife 22 moves from side to side, the ruler 16 and therefore also the sliding surface 14 are in corresponding motion.

[0031] Ruler 16 has a series of air outlet openings 32 distributed transversely across the working width of the harvester 2, which are directed upwards and / or towards the deposition area 8. The air exiting the air outlet openings 32 can reach the falling harvest product in the region of the sliding surface 14 and blow it towards the deposition area 8, so that this harvest product does not fall onto the cultivated soil ahead of the knife bar 6 and is lost.

[0032] In addition, ruler 16 may have covers 30 respectively molded in the regions where the rocker arms 34, 40 are located, these covers protecting the rocker arms 34, 40 against the harvested product and against dirt. The covers 30 may be molded in one piece onto ruler 16, thus facilitating assembly and avoiding Petition 870260047066, dated 05 / 18 / 2026, pp. 43 / 57 16 / 19 junctions and edges where the harvested product could get stuck and form clumps of material.

[0033] Figure 3 shows that the upper and lower knives 22, 24, along their length in the extension direction 26, are retained at the free ends of several retaining arms 28 connected to the frame 4, which, by means of their free ends, are movable to different height positions from one another. Figure 3 shows as an example one of the retaining arms 28, which is configured as a spring in this embodiment. The mobility of the retaining arm 28 is indicated by a corresponding double arrow in the region of its free end. Due to the height-mobility retention of the upper and lower knives 22, 24, they can flexibly adapt to an irregular soil profile during the combine harvester's work. Figure 3 also shows that the rocker arms 40 that retain the upper knife 22 and the lower knife 24 are arranged concentrically with respect to each other on a support point 50 by means of their respective axes of rotation 42 on the combine harvester side.

[0034] Figure 4 shows an enlarged view of the region of the knife bar 6, in which a gear 38 is disposed. The gear 38 is located in the harvester 2 at a point between the side walls 36 of the harvester 2; in the case of only one gear 38 in the harvester 2, preferably at least approximately centrally located between the side walls 34. In the gear 38, a number of drive rotations introduced into the gear 38 by a drive shaft is converted into an oscillating motion of the rocker arms 34 from side to side, by means of which the upper knife 22 and the lower knife 24 of the double knife cutting system 11 are connected in drive. In Figure 4 it is possible to recognize that the drive output shafts 46, for the drive of the rocker arms Petition 870260047066, dated 05 / 18 / 2026, pp. 44 / 57 17 / 19 on the upper side of gear 38 are driven out of the gearbox. There they are connected to the rocker arms 34, which extend from a plane above the plane of the upper and lower knives 22, 24, from the motion output shafts 46 in the direction of the upper and lower knives 22, 24. The rocker arms 34 push the upper and lower knives 22, 24 from side to side, causing the knife blades 18a, 18b to cut the harvested product that lies between the knife blades 18a, 18b. In this way, with only one gear 38 it is possible to drive the two knives 22, 24 in an oscillating manner. The balance of the harvester 2 around its longitudinal central axis remains fully preserved due to the arrangement of gear 38 being at least approximately centralized.Furthermore, the side edges of the harvester 2 are relieved of the weight of the gear 38 and the corresponding drive rod for the gear 38, which has a clear load-relieving effect on the overall construction, especially in the case of larger working widths of the harvester 2 of more than 8 m, because of this the frame 4 can also be built lighter. Figure 4 also shows that the drive rod has a section 48 of the motion output shaft 46 for the lower blade 24, a section in which the rocker arm 46 locally engages the upper blade 22.

[0035] Figure 5 shows a cross-sectional view through the region of the knife bar 6. The upper knife 22 and the lower knife 24 are held there in rocker arms 40, which, between their axes of rotation 42 on the reaper side and the axis of rotation 44 by means of which they are connected to the upper knife 22 or to the lower knife 24, have the same length L as the rocker arms 34 by means of which the upper knife 22 and the lower knife 24 are connected to the gear 38. The rocker arms 40a, 40b that hold the upper knife 22 and the lower knife 24 are arranged concentrically with respect to each other by means of Petition 870260047066, dated 05 / 18 / 2026, pp. 45 / 57 18 / 19 of their respective axes of rotation 42 on the combine harvester side.

[0036] The invention is not limited to the embodiment above. A specialist will have no difficulty in converting this embodiment into a mode that seems appropriate to him, to adapt it to a specific application. List of Reference Numbers combine harvester frame knife bar deposition area conveyor device double knife cutting system conveyor belt sliding surface ruler knife blade knife back upper knife lower knife extension direction retaining arm cover air outlet opening rocker arm (gear) side wall rocker arm gear (support) rotation shaft on the combine side rotation shaft on the knife side drive output shaft Petition 870260047066, dated 05 / 18 / 2026, pp. 46 / 57 19 / 19 48 section 50 support point Petition 870260047066, dated 05 / 18 / 2026, pp. 47 / 57

Claims

1 / 3 CLAIMS 1. Harvester (2) for attachment to a harvester with a frame (4), a knife bar (6), a deposition area (8) for depositing the cut stalk, conveyor devices (10) for unloading the cut stalk, drive devices for driving the knife bar (6) and the conveyor devices (10), wherein the knife bar (6) has a double knife cutting system (11), in which a first part of the knife blades (18a) present in the harvester (2) is fixed to a first knife back (20a), this first part of the knife blades (18a) together with the first knife back (20a) forming the upper knife (22), and a second part of the knife blades (18b) present in the harvester (2) is fixed to a second knife back (20b), this second part of the knife blades (18b) together with the second knife blade (20b) forms the lower knife blade (24);the upper knife (22) and the lower knife (24) are actuated in opposite directions, characterized by the fact that the harvester (2) comprises a sliding surface (14) inclined obliquely in the direction of transport of the harvested product in the transition region from the knife bar (6) to the deposition area (8) and the sliding surface (14) is configured as a ruler (16), which is fixedly connected to the upper knife (22).

2. Harvester (2) according to claim 1, characterized in that the upper blade and the lower blade (22, 24), along their lengths in the extension direction (26), are retained at the ends of several retaining arms (28) connected with the frame (4), which, with their free ends, are movable in positions of different heights from each other.

3. Harvester (2) according to claim 1 or 2, characterized in that the deposition area (8) is configured on the side pointing upwards of one or more conveyor belts (12) driven in a circular manner.

4. Harvester (2) according to any of the preceding claims, characterized in that the ruler (16) has a series of air outlet openings (32) distributed transversely across the working width, which are directed upwards and / or towards the deposition area (8).

5. Harvester (2) according to any of the preceding claims, characterized in that on the ruler (16), in the regions where the balancers (34, 40) are located, covers (30) are respectively configured that protect the balancers (34, 40) against harvesting products and dirt.

6. Harvester (2) according to any of the preceding claims, characterized in that the harvester (2) is configured in several parts and the ruler (16) is configured as being flexible and / or in parts at the stitching points between the parts of the harvester.

7. Harvester (2) according to any of the preceding claims, characterized in that the upper and lower knives (24) of the double knife cutting system (11) are linked by drive with a gear (38) by means of rocker arms (34), said gear being disposed in a location between the side walls (36) of the harvester (2).

8. Harvester (2) according to claim 7, characterized in that the drive output shafts (46), for driving the rocker arms (34) on the upper side of the gear (38), are driven out of the gearbox and the rocker arms (34) extend in a plane above the plane of the upper and lower blades (22, 24) from the drive output shafts (46) in the direction of the upper and lower blades (22, 24). Petition 870260047066, dated 05 / 18 / 2026, page 49 / 57 3 / 3 9. Harvester (2) according to claim 7 or 8, characterized in that the drive rod has a section (48) from the drive output shaft (46) to the lower blade (24), this section in which the rocker arm (40) locally surrounds the upper blade (22).

10. Harvester (2) according to any one of claims 7 to 9, characterized in that the upper knife (22) and the lower knife (24) are retained in rocker arms (40), which, between their axes of rotation (42) on the harvester side and the axes of rotation (44) through which they are connected with the upper knife (22) or with the upper knife (24), have the same length as the rocker arms (34) through which the upper knife (22) and the lower knife (24) are connected with the gear (38).

11. Harvester (2) according to any of the preceding claims, characterized in that the rocker arms (40) that retain the upper blade (22) and the lower blade (24) are arranged concentrically on a support point (50) by means of their respective axes of rotation (42) on the harvester side.

12. Reaper (2) according to any of the preceding claims, characterized in that the rocker arms (46), at their ends on the frame side and / or on the blade side, have a damping element that generates restoring forces.

13. Reaper (2) according to any of the preceding claims, characterized in that the knife blades (18a, 18b) are arranged on the upper knife and the lower knife (22, 24) with a differentiated blade partition. Petition 870260047066, dated 05 / 18 / 2026, p. 50 / 57

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