HARVESTING MACHINE

Description

[0001] The invention relates to a harvesting machine such as a combine harvester, in particular to the filling of the crop tank of the harvesting machine, and to a conveyor screw designed therefor.

[0002] Because the grain separates from the non-grain components of the crop during threshing, it must then be conveyed upwards to fill the combine harvester's crop hopper. This is often done using an elevator with buckets mounted on a revolving chain. These buckets pick up grain collected at the bottom of the threshing unit, lift it, and discharge it into the hopper through a crop inlet opening in one wall. This prevents the crop hopper from being filled higher than the bottom edge of the crop inlet opening.

[0003] To make more full use of the crop tank's capacity, DE 44 19 435 C2 proposes a conveyor auger that is pivotally mounted inside the crop tank at the crop inlet opening, picks up grain discharged by the elevator, and raises it further. A grain outlet opening of the conveyor auger floats on the grain collected in the tank, allowing the incoming grain to be discharged unhindered. Because the outlet opening can be raised to the height of the top edges of the crop tank walls, the crop tank can be filled to these top edges.

[0004] The height that can be bridged in this way is limited by the horizontal dimensions of the crop tank, since the auger conveyor must fit inside the crop tank in a slightly inclined transport position.

[0005] EP 3 721 695 B1 discloses a conveyor screw with two sections that can rotate around intersecting conveyor axes. A proximal section of the conveyor screw is adjacent to the crop inlet opening on a wall of the crop tank, and a distal section of the conveyor screw is arranged at a distance from the crop inlet opening at the free end of the proximal section by the proximal section. By foldably connecting the proximal section and the distal section to one another via a cardan joint, a larger height difference can be overcome. In a transport position, the two-part conveyor screw is placed in a folded position within the crop tank. The articulated connection of the proximal and distal sections limits the foldability of the conveyor screw within the conveyor screw and the associated maximum length of the sections of the conveyor screw.As crop tank volumes continue to grow, the required filling height increases further, so that a raised discharge point of the auger is necessary for more complete filling.

[0006] It is therefore an object of the invention to avoid the described disadvantages of the prior art and in particular to provide a harvesting machine with a crop tank which comprises a conveyor device with a higher discharge point.

[0007] This object is achieved according to the invention by the characterizing features of claim 1.

[0008] According to claim 1, a harvesting machine is proposed with a crop tank and a first conveyor auger arrangement inside the tank, which comprises at least one first conveyor auger extending from a crop inlet opening on a wall of the crop tank into the interior of the crop tank, and a movable second conveyor auger arrangement inside the tank, which comprises at least one second conveyor auger. The harvesting machine comprises a first actuator for moving the second conveyor auger arrangement from a horizontally oriented transport position into a vertically oriented working position, the second conveyor auger arrangement being movably arranged in the crop tank by means of a four-bar linkage. The invention has many advantages. Due to the four-bar linkage, the length of the second conveyor auger arrangement is not limited by a stationary pivot axis.The space available in the crop tank can thus be optimally used to position the second auger assembly in a flat position within the crop tank in the transport position, so that the second auger assembly can be made longer than the auger assembly known from the prior art. Thus, by arranging the second auger assembly with a four-bar linkage within the crop tank, a longer second auger assembly can be placed in the crop tank. Furthermore, a higher discharge point of the second auger assembly is achieved in the working position, so that the crop tank can be filled to a higher fill level. The four-bar linkage kinematics enables the second auger assembly to be pivoted from the working position into the transport position along an arcuate trajectory.

[0009] According to an advantageous development, the four-bar linkage comprises a first and a second articulated arm, wherein the first articulated arm is rotatably mounted on the crop tank with a first joint and rotatably mounted on the second auger conveyor arrangement with a second joint, wherein the second articulated arm is rotatably mounted on the crop tank with a third joint and rotatably mounted on the second auger conveyor arrangement with a fourth joint. This advantageous development provides a simple four-bar linkage arrangement for pivoting the second auger conveyor arrangement between the transport position and the working position.

[0010] According to a further advantageous development, the arrangement of the second auger conveyor assembly with the first and second articulated arms extends diagonally within the crop tank, at least in the transport position of the second auger conveyor assembly, wherein the first joint and third joint are preferably arranged opposite one another laterally within the crop tank. Because the auger conveyor assembly, including the first and second articulated arms, are arranged diagonally within the crop tank in the transport position, the available space within the crop tank can be optimally utilized for positioning the second auger conveyor assembly.

[0011] An advantageous embodiment provides that the first actuator is arranged with a fifth joint so as to be rotatable on the second articulated arm and with a sixth joint so as to be rotatable on the crop tank, so that upon actuation of the first actuator, the second conveyor screw arrangement can be moved from the transport position to the working position and vice versa.

[0012] Furthermore, the second articulated arm can have a shorter longitudinal extent than the first articulated arm and preferably the second and fourth joints each form pivot axes that are arranged at a distance from one another and extend parallel to one another, wherein the distance between the respective pivot axes formed by the second and fourth joints is smaller than the longitudinal extent of the second articulated arm. As a result, when pivoting between the working position and the transport position, the second auger conveyor arrangement is guided in the region of the second and fourth joints along a circular path defined by the articulated arms, wherein the second auger conveyor arrangement simultaneously performs a rotational movement about a rotation axis located between the second and fourth joints. The second auger conveyor arrangement can thus be moved collision-free between the positions within the crop tank.

[0013] In order to avoid a collision between the first and second conveyor screw arrangements, a second actuator can be provided and configured to move the first conveyor screw arrangement, wherein the harvesting machine comprises a control device for controlling the first and second actuators, wherein the control device is configured such that, in a first step, it controls the second actuator to move the first conveyor screw arrangement from a substantially flat transport position to a working position and, in a second step, it controls the first actuator to move the second conveyor screw arrangement from the transport position to the working position.

[0014] It is particularly preferred if the harvesting machine comprises an expansion device for increasing the volume arranged at an upper opening of the crop tank, which in a flat closed position forms a lid which at least partially closes the upper opening and in an erected filling position increases the volume of the crop tank, wherein the first conveyor screw arrangement is kinematically coupled to the expansion device by a lever arrangement in such a way that when the expansion device is moved from the closed position to the filling position, the first conveyor screw is simultaneously moved from a transport position to a working position.

[0015] In order to increase the rigidity of the four-joint arrangement of the second auger assembly, the harvesting machine may comprise a stabilizer for absorbing forces acting on the second auger assembly.

[0016] According to a preferred embodiment, the stabilizer can comprise a coupling arranged in an articulated manner on the second conveyor auger arrangement and a support strut connected in an articulated manner to the coupling, wherein the support strut is additionally connected in an articulated manner to the crop tank. Preferably, a spring element, in particular a gas damper, is arranged on the coupling, wherein the spring element is provided and configured to apply a tensile force to the coupling. Such a stabilizer can absorb forces acting on the second conveyor auger arrangement without the movement of the four-bar linkage being blocked by the stabilizer.

[0017] An advantageous development provides that the first conveyor screw arrangement comprises a first tube which radially surrounds the first conveyor screw on the outside, and the second conveyor screw arrangement comprises a second tube which radially surrounds the second conveyor screw on the outside, wherein a transition piece is preferably provided between the first conveyor screw arrangement and the second conveyor screw arrangement to seal a transition area between the first conveyor screw arrangement and the second conveyor screw arrangement. The closed design prevents crop already located in the crop tank from reaching one of the conveyor screws and the crop from being conveyed in a circle. This reduces wear and the drive power of the conveyor screws.In an alternative design variant, however, it is also conceivable that the second conveyor screw arrangement is designed without a tube surrounding the second conveyor screw radially on the outside.

[0018] Preferably, in a working position of the first conveyor screw arrangement and a working position of the second conveyor screw arrangement, the first and second conveyor screw arrangements can be arranged relative to one another in such a way that a crop flow conveyed by the first conveyor screw arrangement is transferred to the second conveyor screw arrangement and preferably the crop discharge of the second conveyor screw arrangement takes place centrally in the crop tank.

[0019] It is particularly preferred if the first conveyor screw arrangement in the working position extends obliquely upwards into the crop tank and the second conveyor screw arrangement in its transport position is arranged in sections below the first conveyor screw arrangement in the working position, wherein the second conveyor screw arrangement is movable by means of the four-bar linkage such that it can be moved from the transport position into the working position without collision with the first conveyor screw arrangement in the working position.

[0020] Further advantageous embodiments are the subject of further subclaims and are described below with reference to an embodiment illustrated in several figures. They show: Figure 1 shows a schematic section through a combine harvester with a conveyor auger according to the invention; Figure 2 shows a perspective view of the extension device in a flat, closed position; Figure 3 shows a schematic section through the crop tank of a combine harvester; Figure 4 shows a perspective view of a lever arrangement for the kinematic coupling of a first conveyor auger arrangement to the extension device; Figure 5 shows the movement sequence of a pivoting process of the second conveyor auger arrangement from a transport position to a working position; Figure 6 shows a schematic view of a stabilizer for absorbing forces acting on the second conveyor auger arrangement.

[0021] Fig. 1shows a schematic longitudinal section through a harvesting machine 1 designed as a combine harvester with a foldable extension device 2 for increasing the volume of a crop tank 3. The combine harvester is equipped at the front with a cutting unit 4 which is arranged on a conveyor belt 5. With the cutting unit 4, the combine harvester picks up the crop 6 and feeds it to the conveyor belt 5. The conveyor belt 5 transfers the crop 6 to a downstream threshing unit 7. The threshing unit 7 prepares the crop 6, dividing it into a grain-chaff mixture 8 and a crop stream 9 consisting of threshed stalks. The grain-chaff mixture 8 is conveyed via a preparation floor 10 directly to a cleaning device 11, which separates the grain 12 from the non-grain components 13, i.e. from stalk and chaff parts.

[0022] Behind the threshing unit 7, a counterclockwise rotating turning drum 14 is arranged, which conveys the crop stream 9 consisting of threshed stalks onto a straw walker 15. The straw walker 15 separates the grain 12, short straw 16, and chaff 17 still present in the crop stream 9, which also reach the cleaning device 11 via a return floor 18. A grain elevator 19 conveys the grains 12 separated by the cleaning device 11 into the harvested material tank 3. A mass flow sensor 50 for detecting the mass flow of the grain is arranged, for example, on the path of the grain from the cleaning device 11 to the grain elevator 19.

[0023] The grain elevator 19 comprises an endlessly rotating belt 23 equipped with scoops 22. The scoops 22 take the grain from the cleaning device 11 and convey it upwards in a shaft to a material inlet opening 24 in a wall 25 of the crop tank 3.

[0024] The crop tank 3 is designed as a container with a substantially rectangular base and is arranged behind a driver's cab 26 of the combine harvester. The crop tank 3 has an opening 20 on its top side, and several plate-shaped elements 27, 28 forming the extension device 2 are hinged to the upper edges 21 of its walls. The plates 27, 28 are movable between a closed position overlapping one another above the opening and a Fig. 1 shown working position, in which the extension device 2 extends the crop tank 3 upwards in a funnel shape.

[0025] Fig. 2shows a perspective view of the extension device 2 in a flat, closed position 35. The open top of the crop tank 3 is rectangular but not necessarily square; the shorter edges of the rectangle extend in the longitudinal direction of the combine harvester, and the two plates 27 hinged to them are dimensioned such that their edges 29 remote from the hinge approximately touch each other in the closed position 35 and completely conceal the underlying plates 28.

[0026] In the view of the Fig. 3 Plates 27, 28 are in their also in Fig. 1The plates 34 are pivoted into the filling position shown, in which they, together with the triangular elements 30 connecting the short edges of the plates 27, 28, expand the crop tank 3 upwards in a funnel shape. Further plates 34, which further expand the crop tank 3 upwards, are articulated on the upper edges of the plates 27 and 28, which are located on the upper side in the open position, as well as on the triangular elements 30. The further plates 34 form a second expansion level of the expansion device 2, which expands the crop tank 3 upwards.

[0027] In the sectional view of the Fig. 3a first and second conveyor screw arrangement 37, 38 can be seen, each of which is in its working position 31, 78. The first conveyor screw arrangement 37 comprises a first tube 39 which radially outwardly encloses a first conveyor screw 40. The second conveyor screw arrangement 38 comprises a second tube 41 which radially outwardly encloses a second conveyor screw 42. A base 33 of the first conveyor screw arrangement 37 is mounted on the wall 25 adjacent to the material inlet opening 24 in order to position the first conveyor screw arrangement 37 in front of the material inlet opening 24 such that grain conveyed through the material inlet opening 24 can be received by the first conveyor screw arrangement 37.

[0028] For this purpose, an open end of the first pipe 39 can be placed directly in front of the material inlet opening 24. The first conveyor screw 40 can be directly or indirectly coupled to a drive of the elevator 19 in order to be positively coupled to the elevator 19. The first conveyor screw arrangement 37 is pivotally mounted on the base 33. In the Fig. 3 In the working position 78 of the first conveyor screw arrangement 37 shown, the first tube 39 and the first conveyor screw 40 extending therein are pivoted into an ascending position. The pitch of the first conveyor screw 40 is at least 30 degrees, preferably approximately 45 degrees. The discharge side 43 is positioned centrally above the open top of the crop tank 3. The second conveyor screw arrangement 38 extends in the Fig. 3 shown working position 31 vertically and is positioned centrally within the crop tanks 3.

[0029] An inlet opening 44 of the second pipe 41 is assigned to the discharge side 43 of the first pipe 39, so that a crop flow conveyed by the first auger conveyor arrangement 37 is transferred to the second auger conveyor arrangement 38. For this purpose, a transition piece 45 can be arranged between the inlet opening 44 of the second pipe 41 and the discharge side 43 of the first pipe 39. The transition piece 45 is tubular and ensures a loss-free transfer of a crop flow from the first auger conveyor arrangement 37 to the second auger conveyor arrangement 38. The crop flow is conveyed further by the second auger conveyor arrangement 38 in the vertical direction.

[0030] The first and second conveyor screw arrangements 37, 38 are each arranged to be movable from the working position 31, 78 to a transport position 32. The pivoting movements of the plates 27, 28 and the first conveyor screw arrangement 37 are mechanically coupled to one another. For this purpose, the first conveyor screw arrangement 37 is provided with a Fig. 4 illustrated lever arrangement 46 is kinematically coupled to the extension device 2, so that when the extension device 2 is moved from the closing position 35 into the filling position 36, the first conveyor screw arrangement 37 is simultaneously moved from the transport position into the working position 78.

[0031] The second auger conveyor arrangement 38 is movably arranged in the crop tank 3 by means of a four-bar linkage 47 for pivoting from the working position 31 to the transport position 32. The four-bar linkage 47 comprises a first and a second articulated arm 48, 49, each of which is rotatably or pivotably mounted at one end on the crop tank 3 and at the other end on the second auger conveyor arrangement 38. The first articulated arm 48 is rotatably mounted on the crop tank 3 by a first joint 50 and rotatably mounted on the second auger conveyor arrangement 38, in particular on the second pipe 41, by a second joint 51. Here and preferably, a bracket 52, on which the first joint 52 is arranged, is arranged on a wall of the crop tank 3.The second articulated arm 49 is rotatably mounted on the crop tank 3 by a third joint 53 and on the second auger conveyor arrangement 38, in particular on the second pipe 41, by a fourth joint 54. Here, and preferably, a further bracket 55 is arranged on a wall of the crop tank 3, on which bracket the third joint 53 is arranged. The second joint 51 and fourth joint 54 are arranged at a distance from one another on the second auger conveyor arrangement 38. The second joint 51 and fourth joint 54 form pivot axes 56, 57 extending parallel to one another for pivoting the second auger conveyor arrangement 38.

[0032] The first joint 50 and third joint 53 form pivot axes 58, 59 extending parallel to one another. The first joint 50 and third joint 53, together with the second and fourth joints 49, 54, form a rocker for the second conveyor screw arrangement 38, here and preferably such that the second conveyor screw arrangement 38 is pivotally movable along a curved path between the first joint 50 and the third joint 53. The joints 50, 51, 53, 54, the first articulated arm 48, the second articulated arm 49, and the second conveyor screw arrangement 38 are connected to one another in the manner of a four-bar linkage 47, so that the curved path for pivoting the second conveyor screw arrangement 38 is defined.Furthermore, the arrangement of the second conveyor screw arrangement 38 with the first and second articulated arms 48, 49 extends diagonally within the crop tank 3, wherein the first joint 50 and third joint 53 are arranged opposite one another, preferably on lateral walls 63 of the crop tank, within the crop tank 3.

[0033] A first actuator 60, designed as a hydraulic cylinder or electric motor, is movably coupled to the second articulated arm 49 by a fifth joint 61 and to the crop tank 3 by a sixth joint 62. By means of the first actuator 60, the second conveyor screw arrangement 38 can be moved along the trajectory defined by the four-bar linkage 47. The trajectory is defined by the lengths of the articulated arms 49, 48 and the arrangement of the joints 50, 51, 53, 54 such that the second conveyor screw arrangement 38 can be moved from the working position 31 to the transport position 32 without colliding with the first conveyor screw arrangement 37 located in the working position 78. For this purpose, the second articulated arm 49 has a shorter longitudinal extension than the first articulated arm 48 and the distance between the pivot axes 56, 57 is smaller than the longitudinal extension of the second articulated arm 49.This design of the multi-joint 47 has the effect that when the second conveyor screw arrangement 38 is moved from the transport position 32 to the working position 31, the second conveyor screw arrangement 38 is guided substantially in an arc around the first conveyor screw arrangement 37 located in the working position 31.

[0034] Fig. 5 shows the trajectory curve along which the second conveyor screw arrangement 38 is moved step by step from its transport position 32 to the working position 31. The first conveyor screw arrangement 37 is already in its working position 78. Fig. 5First, the second auger conveyor assembly 38 is in the transport position 32. In this transport position 32, the second auger conveyor assembly 38 is oriented in a flat position. In other words, the second auger conveyor assembly 38 extends substantially horizontally above a floor 64 of the crop tank 3. The second auger conveyor assembly 38 is located partially below the first auger conveyor assembly 37. The first actuator 60 is retracted, and the first articulated arm 48 is partially above the second articulated arm 49.

[0035] In order to move the second screw conveyor arrangement 38 from the transport position 32 into the working position 31, the actuator 60 is extended. The four-bar linkage 47 is designed such that, when moving from the transport position 32 to the working position 31, the second screw conveyor arrangement 3 is raised in the region of the second joint 51 along a first circular path 65 defined by the first articulated arm 48, and at the same time, the second screw conveyor arrangement 38 is raised in the region of the fourth joint 54 along a second circular path 66 defined by the second articulated arm 49. In doing so, the second screw conveyor arrangement 38 performs a rotational movement 67 about a rotational axis located between the second joint 51 and the fourth joint 54. This movement continues until the second screw conveyor arrangement 38 is in its working position 31. The working position 31 of the second screw conveyor arrangement 38 is in Fig. 5shown on the right.

[0036] In Fig. 5 A second actuator 69 is schematically shown, which is arranged at one end rotatably on the first conveyor screw arrangement 37 and at the other end on the crop tank 3 in order to move the first conveyor screw arrangement 37 from its transport position to the working position 78. In an alternative embodiment, the second actuator 69 can also be arranged on the extension device 2. The combine harvester comprises a Fig. 5schematically illustrated control device 70, which is provided and configured to control the first and second actuators 60, 69. The control device 70 is configured such that, in a first step, it moves the second actuator 69 to move the first conveyor screw arrangement 37 from a substantially flat transport position (not shown in detail here) to its working position 78, wherein only when the first conveyor screw arrangement 37 is in its working position 78 is the second conveyor screw arrangement 38 moved in a second step from its transport position 32 to the working position 31. This is intended to avoid a collision between the first conveyor screw arrangement 37 and the second conveyor screw arrangement 38.

[0037] Here and preferably, to increase the rigidity, a Fig. 6The stabilizer 71 shown is arranged on the second conveyor screw arrangement 38. A coupling rod 74 of the stabilizer 71 is arranged at one end on the second conveyor screw arrangement 38 and at the other end with a bracket 67 on the crop tank 3. As Fig. 6, a coupling 72 is rotatably connected to the second tube 41 of the second conveyor screw arrangement 38 by a seventh joint 73. The coupling rod 74 is rotatably arranged on the coupling 72 by an eighth joint 75. The coupling 72 is articulated to the second conveyor screw arrangement 38 and the coupling rod 74 in order not to block the movement sequence when pivoting the second conveyor screw arrangement 38 from the transport position 32 to the working position 31. A spring element 77, in particular a gas damper, is arranged on the coupling 72, wherein the spring element 77 is provided and configured to apply a tensile force to the coupling 72, pressing the coupling 72 onto the second tube 41. The spring element 77 is articulated at the other end to the second articulated arm 49.In an alternative embodiment, the spring element 77 can also be arranged at the other end on the second tube 41 of the second conveyor screw arrangement 38. List of reference symbols: 1 Harvester 34 plate 2 Extension device 35 Locking position 3 crop tank 36 Filling position 4 Cutting unit 37 First screw conveyor arrangement 5 Inclined conveyor 38 Second conveyor screw arrangement 6 Harvest 39 First pipe 7 threshing machine 40 First screw conveyor 8 Grain-chaff mixture 41 Second pipe 9 Goods flow 42 Second screw conveyor 10 Preparation floor 43 Ejection side 11 Cleaning facility 44 Inlet opening 12 grain 45 transition piece 13 Non-grain components 46 Lever arrangement 14 Turning drum 47 four-bar linkage 15 Horde shaker 48 First articulated arm 16 Short straw 49 Second articulated arm 17 chaff 50 First joint 18 Return floor 51 Second joint 19 Grain elevator 52 console 20 opening 53 Third joint 21 top edge 54 Fourth joint 22 shovel 55 console 23 band 56 Swivel axis 24 Goods inlet opening 57 Swivel axis 25 Wall 58 Swivel axis 26 Driver's cab 59 Swivel axis 27 plate 60 First actor 28 plate 61 Fifth joint 29 Far edge 62 Sixth joint 30 Triangular element 63 walls 31 Working position of the second screw conveyor arrangement 64 Floor 32 Transport position second conveyor screw arrangement 65 First circular orbit 33 base 66 Second circular orbit 67 rotational movement 74 coupling rod 68 Control device 75 Eighth joint 69 Second actor 76 console 70 Control device 77 spring element 71 stabilizer 78 Working position of the first conveyor screw arrangement 72 paddock 73 Seventh joint

Claims

1. A harvesting machine (1) with a harvested material tank (3) and a first screw conveyor assembly (37) inside the tank, which comprises at least one first screw conveyor (40) which extends from a material inlet opening (24) on a wall (25) of the harvested material tank (3) into the interior of the harvested material tank (3) and a movable second screw conveyor assembly (38) inside the tank, which comprises at least one second screw conveyor (42), wherein the harvesting machine (1) comprises a first actuator (60) for moving the second screw conveyor assembly (38) from a transport position (32) lying in a flat orientation into a working position (31) in a vertical orientation, characterized in that the second screw conveyor assembly (38) is disposed in the harvested material tank (3) for movement by means of a four bar linkage (47).

2. The harvesting machine (1) according to claim 1, characterized in that the four bar linkage (47) comprises a first and second joint arm (48, 49), wherein the first joint arm (48) is disposed on the harvested material tank (3) for rotatable movement with a first joint (50) and on the second screw conveyor assembly (38) for rotatable movement with a second joint (51), wherein the second joint arm (49) is disposed on the harvested material tank (3) for rotatable movement with a third joint (53) and on the second screw conveyor assembly (38) for rotatable movement with a fourth joint (54).

3. The harvesting machine (1) according to claim 2, characterized in that, in the transport position (32) of the second screw conveyor assembly (38), the second screw conveyor assembly (38) with the first and second joint arm (48, 49) extends diagonally inside the harvested material tank (3), wherein preferably, the first joint (50) and third joint (53) are disposed opposite to each other inside the harvested material tank (3).

4. The harvesting machine (1) according to one of claims 2 to 3, characterized in that the first actuator (60) is disposed on the second joint arm (49) for rotatable movement with a fifth joint (61) and on the harvested material tank (3) for rotatable movement with a sixth joint (62).

5. The harvesting machine (1) according to one of claims 2 to 4, characterized in that the second joint arm (49) has a shorter longitudinal extent than the first joint arm (48) and preferably the second and fourth joints (51, 54) respectively form mutually separated pivot axes (56, 57) extending parallel to one another, wherein the separation of the respective pivot axes (56, 57) formed by the second and fourth joints (51, 54) with respect to each other is smaller than the longitudinal extent of the second joint arm (49).

6. The harvesting machine (1) according to one of claims 1 to 5, characterized in that a second actuator (69) is provided and configured for the displacement of the first screw conveyor assembly (37), wherein the harvesting machine (1) comprises a control device (70) for controlling the first and second actuator (60, 69), wherein the control device (70) is configured in a manner such that in a first step, it controls the second actuator (69) for the displacement of the first screw conveyor assembly (37) into a working position (78) and in a second step, it controls the first actuator (60) for the displacement of the second screw conveyor assembly (37) from the transport position (32) into the working position (31).

7. The harvesting machine (1) according to one of claims 1 to 6, characterized in that the harvesting machine (1) comprises a volume-enlarging extension device (2) disposed at an upper opening (20) of the harvested material tank (3) which, in a closed position (35) which lies flat, forms a cover closing off the upper opening (20) and, in a deployed filling position (36), enlarges the volume of the harvested material tank (3), wherein the first screw conveyor assembly (37) is kinematically coupled to the extension device (2) with a lever assembly (46) in a manner such that upon the displacement of the extension device (2) from the closed position (35) into the filling position (36), the first screw conveyor assembly (37) is displaced at the same time.

8. The harvesting machine (1) according to one of claims 1 to 7, characterized in that the harvesting machine (1) comprises a stabilizer (71) for taking up forces acting on the second screw conveyor assembly (38).

9. The harvesting machine (1) according to claim 8, characterized in that the stabilizer (71) comprises a coupler (72) hingedly disposed on the second screw conveyor assembly (38) and a support strut (74) hingedly connected to the coupler (72), wherein the support strut (74) is additionally hingedly connected to the harvested material tank (3), wherein preferably, a spring element (77), in particular a gas damper, is disposed on the coupler (72), wherein the spring element (77) is provided and configured for the application of a tensile force to the coupler (72).

10. The harvesting machine (1) according to one of claims 1 to 9, characterized in that the first screw conveyor assembly (37) comprises a first tube (39) which radially surrounds the outside of the first screw conveyor (40) and the second screw conveyor assembly (38) comprises a second tube (41) which radially surrounds the outside of the second screw conveyor (42), wherein preferably, a transition piece (45) for blocking a transition region between the first screw conveyor assembly (37) and the second screw conveyor assembly (38) is disposed between the first screw conveyor assembly (37) and the second screw conveyor assembly (38).

11. The harvesting machine (1) according to one of claims 1 to 10, characterized in that in the working position (78) of the first screw conveyor assembly (37) and the working position (31) of the second screw conveyor assembly (38), the first and second screw conveyor assemblies (38) are disposed with respect to each other in a manner such that a flow of harvested material conveyed from the first screw conveyor assembly (37) is transferred to the second screw conveyor assembly (38) and preferably, material from the second screw conveyor assembly (38) is discharged centrally into the harvested material tank (3).

12. The harvesting machine (1) according to one of claims 1 to 11, characterized in that in the working position (78), the first screw conveyor assembly (37) extends upwards at an inclination into the harvested material tank (3), and in its transport position (32), a section of the second screw conveyor assembly (38) is disposed beneath the first screw conveyor assembly (37) situated in the working position (78), wherein the second screw conveyor assembly (38) can be moved by means of the four bar linkage (47) in a manner such that it can be moved from the transport position (32) into the working position (31) without colliding with the first screw conveyor assembly (37) situated in the working position (78).