Harvesting header with cross-conveyor auger

Abstract

The present invention relates to a harvesting attachment (2) with a support frame (4) and two pivotable segments (14) which has a split transverse auger (24). To improve the conveying and transfer performance of the transverse screw conveyor (24), it is supported at its mutually facing first inner ends (32) in bearings (36) fixedly connected to the support frame (4), which are located in front of the transfer opening (10), the sections of the transverse screw conveyor (24) are supported at their outer second ends (34) of the sections in bearings (38) connected to the segment (14), and the sections of the transverse screw conveyor (24) have a division (40) in their extension direction into an outer and inner screw section (42, 44), via which the length of the transverse screw conveyors (24) is variable in their extension direction.

Description

[0001] The present invention relates to a harvesting attachment according to the preamble of claim 1.

[0002] A two-part harvesting header with two transverse augers is disclosed in US patent 2014 / 0137529 A1. The harvesting header disclosed therein is a corn picker that cuts the corn stalks to be harvested close to the ground and pulls them downwards, so that the corn cobs are separated from the stalks by picking plates and conveyed backwards, against the direction of travel, into the working area of ​​a transverse auger. The transverse auger conveys the corn cobs perpendicular to the direction of travel to a transfer opening, where they exit the harvesting header and are discharged onto the inclined conveyor of a combine harvester to which the harvesting header is mounted.

[0003] The header, previously disclosed in US patent 2014 / 0137529 A1, comprises two segments, each extending over a portion of the corn header's total working width. The header is divided into two segments with a central split between them to allow it to better adapt to uneven ground contours when traveling over rough terrain. Each segment can pivot independently of the other at its outer end by a certain angle, either upwards or downwards. This change in the segment's relative position to the surface being worked allows it to cut the corn stalks as close to the ground as possible across the portion of the working width covered by that segment.

[0004] The transverse augers are fixed at both ends within their respective segments to prevent the conveying of already harvested crop from being interrupted during segment pivoting movements, thus preventing crop losses. If the transverse augers could move relative to the segments during pivoting movements in such a way that the outer edges of the guide plates no longer graze the bottom of the auger trough during rotation, the conveying effect of the guide plates would cease in that area. This would lead to material blockages, where the auger trough associated with each transverse auger becomes clogged and can no longer receive newly conveyed corn cobs. The unconveyed corn cobs could then fall to the ground, resulting in significant crop losses.

[0005] While the fixed positioning of the transverse augers on their assigned segments prevents losses due to disturbances in the material flow along the conveying sections, it leads to material flow problems in the area of ​​the transfer opening. Here, the material flow must be redirected by 90° from a direction perpendicular to the working direction to a direction opposite to the working direction through the transfer opening. To maintain the degrees of freedom necessary for the segments to pivot up and down relative to each other, a clearance must remain between the facing ends of the conveying sections. This clearance allows the segments, with the ends of the transverse augers, to move without colliding with the adjacent segment. This clearance inevitably remains unused for feeding the transfer opening with harvested material.This results in uneven crop intake into the inclined conveyor and, consequently, uneven crop distribution during further processing in the harvester. The incomplete filling of the transfer opening with crop also impairs the harvesting capacity of the header because the theoretical capacity of the inclined conveyor is not fully utilized.

[0006] Patent application DE 10 2017 113 775 A1 discloses a harvesting header with three articulated segments and a three-part transverse auger. Since the articulation axes of the segment connections and the articulation axes of the sections of the transverse auger are vertically separated, pivoting movements of the segments and the subsequent pivoting movements of the sections of the transverse auger result in length differences in the auger. These differences are compensated for by sliding bearings at the ends of the sections. Depending on the pivot position of the segments and the resulting pivot position of the sections of the transverse auger, the changes in length of the auger create dead spaces within the conveying path. These dead spaces are not covered by the conveying elements of the auger, and consequently, undesirable material accumulations can form in these dead spaces.Such accumulations of material lead to disruptions in the flow of goods.

[0007] The object of the present invention is to improve the transfer of the harvested crop in the area of ​​the transfer opening in a harvesting attachment of the generic type.

[0008] The problem is solved by the characterizing features of claim 1.

[0009] The first inner ends of the transverse auger sections, facing each other in the area of ​​the transfer opening, are fixed in bearings to prevent axial movement. This measure minimizes the clearance for pivoting movements of the segments between the transverse auger sections in the sensitive area of ​​the transfer opening where the crop flow is redirected. This reduces the area within the header not covered by conveying elements on the transverse auger sections. Because the first inner ends of the transverse auger sections are fixed in bearings, no clearances exist that are not reached by the conveying elements of the transverse auger, regardless of the segments' pivoting position.Dead zones, where material can accumulate and hinder the smooth transport and transfer of the harvested crop through the transfer opening to the harvester, are thus avoided. This makes it possible to feed almost the entire width of the transfer opening with harvested crop using the sections of the transverse auger, increasing the throughput not only of the header but also of the harvester equipped with it.

[0010] The first inner ends of the transverse screw conveyor sections, facing each other, are located in the area of ​​the transfer opening. The fixed support of the transverse screw conveyor on the support frame in the area of ​​the transfer opening results in a spatial alignment of the two sections of the transverse screw conveyor with respect to the transfer opening that is virtually unaffected by pivoting movements of the segments. The conveying elements integrated into the transverse screw conveyor can be optimized in their conveying action without having to consider any degrees of freedom required to allow pivoting of the segments.The bearings in which the sections of the transverse screw conveyor are supported at their mutually facing first inner ends of the sections can be located, viewed horizontally, at least approximately in the middle in front of the transfer opening, in order to enable a uniform transfer of the harvested crop from the transverse screw conveyor to the inclined conveyor through the transfer opening from both sides.

[0011] The bearings are positioned in front of the transfer opening when viewed in the direction of travel and at or above the level of the transfer opening when viewed vertically. The bearing height depends on the diameter of the transverse auger, the height of the opening between the auger housing and the header's feed trough, and the thickness of the crop mat that can be received and conveyed by the harvester to which the header is attached. This bearing positioning provides sufficient space to optimize the material flow of the conveying elements on the transverse auger.

[0012] The outer ends of the transverse auger sections are also axially fixed in bearings. This ensures that the outer ends of the transverse auger sections remain virtually unaffected by the segments' pivoting movements and are not displaceable. The conveying elements integrated into the transverse auger can be optimized without having to consider any degrees of freedom required to allow the segments to pivot. The support provided at the outer ends of the transverse auger sections allows them to follow the segments' pivoting movements.The bearings can be fixedly connected to the segments, but it is also possible to arrange the bearings so that they can still allow a vertical relative movement of the transverse screw conveyor to the segments, for example to be able to move upwards in case of foreign objects or overload conditions.

[0013] The sections of the transverse screw conveyor are divided in their direction of extension into an outer and an inner screw section. These screw sections are telescopically adjustable relative to each other, allowing the length of the transverse screw conveyor to vary during pivoting movements of the segments. This additional division of the respective sections of the transverse screw conveyor into inner and outer screw sections, which are also telescopically adjustable relative to each other in their direction of extension, compensates for length differences that may arise from different pivot positions of the segments relative to the support frame. The reference to an inner screw section does not necessarily mean that it must be fitted with a web plate along its entire length or even a portion thereof.The inner screw section can also be equipped with other suitable conveying elements, such as conveying paddles, along its entire length or a portion thereof. To enable telescoping, the screw drum of one of the two outer and inner screw sections is, for example, hollow inside, with the cavity having a larger inner diameter than the outer circumference of the other, second screw section. This allows the second screw section to partially immerse itself in the cavity of the first screw section during a corresponding insertion movement. In the conveying direction of the crop, this ensures that, even in the segmentation area, an uninterrupted contact surface for the conveyed crop is maintained by the screw drums, which at least partially overlap, regardless of the respective pivot position of the segments relative to each other.

[0014] If the harvester header has only two segments, and the transverse auger is divided centrally in front of the transfer opening, this division results in only a right and a left section of the transverse auger. These two sections then simultaneously form the outer sections of the transverse auger, which, in their direction of extension, are further divided into an outer and an inner auger section and are telescopically adjustable relative to each other. If the harvester header has three segments, namely a central segment and two lateral segments adjoining it, the transverse auger remains divided centrally into a right and a left section, which, in turn, are further divided in their direction of extension into an outer and an inner auger section.The idea of ​​dividing the transverse auger in the middle, mounting the inner first ends on the support frame and the outer second ends on the pivotable segment in a fixed length, and enabling length changes through a further telescopic division of the sections, is therefore possible for harvesting attachments equipped with two or three segments, without significantly reducing the conveying effect of the transverse auger.

[0015] By not compensating for length differences at the ends of the transverse auger sections, but rather at a different point along the auger's length, the area particularly sensitive for the smooth transfer of the harvested crop—specifically, the area between the first inner ends of the auger sections facing each other, in front of the transfer opening—remains virtually unchanged during pivoting movements of the segments. Furthermore, depending on the pivoting position of the segments, accumulations of harvested crop could occur at the outer ends of the auger sections if the length compensation for different pivoting positions were achieved by a variable distance between the ends of the auger sections and the side walls of the header. This is because, depending on the pivoting position of the respective auger, the conveying elements located on the auger sections might not be able to reach the dead spaces there.If the divisions are formed at a suitable distance from the inner and outer ends of the sections of the transverse screw conveyor, the disadvantages described above in the conveying-sensitive end areas of the transverse screw conveyor can be avoided.

[0016] The pivot axes, by which the segments are pivotally connected to the support frame, can be located vertically in an area below the transfer opening and horizontally transversely to the working direction between the outer edges of the transfer opening, or laterally offset to the outer edges of the transfer opening. The pivot axes are preferably oriented in the working direction of the harvesting header. The working direction of the harvesting header is the direction in which the header is driven into the standing crop to collect the harvested crop.

[0017] By combining the measures described above – stationary mounting of the inner first ends of the sections of the transverse auger on the support frame in the area of ​​the transfer opening, special positioning of the bearings in the area of ​​the mutually facing first inner ends of the sections of the transverse auger in front of the transfer opening, mounting of the outer second ends of the sections of the transverse auger on the movable segments and length compensation of the sections of the transverse auger via an additional length-variable division – it is possible to maintain the conveying effect of the transverse auger even during pivoting movements of the segments, without having to accept disadvantages in the material flow over the length of the transverse auger and in the area of ​​deflection from the transverse conveying of the harvested material into the transfer opening.In this configuration, the transverse auger has enough degrees of freedom to follow the movements of the harvester header segments along the contours of the ground.

[0018] The proposed method of supporting the transverse screw conveyor eliminates the need for expensive and wear-prone universal joints. The proposed solution is comparatively inexpensive to manufacture.

[0019] The harvesting header can be, for example, a two- or three-section corn picker for harvesting corn, where a transverse auger is used to transfer the corn cobs from the picking plates to the discharge opening. However, the harvesting header can also be a grain header, which is available on the market in various designs. Transverse augers are used particularly in grain heads with a fixed base plate, where the auger is the only active conveying device for transporting the grain perpendicular to the direction of travel from the cutting point to the discharge opening. Another type of grain header is a draper header, where transverse conveying is achieved using endless belt conveyors; such draper headers may also incorporate a transverse auger.

[0020] According to one embodiment of the invention, the outer screw section of a transverse screw conveyor is the screw section with the cavity into which the inner screw section can immerse. The outer screw section is the screw section located furthest from the transfer opening. Since the material is conveyed from the outside to the inside, the harvested material flows past the interface between the screw sections without being forced into the cavity or becoming lodged on the edge of the screw drum. This prevents the build-up of material wrapping around the screw at the interface between the screw sections.

[0021] According to one embodiment of the invention, the bearings, which are fixedly connected to the support frame and in which the sections of the transverse screw conveyor are supported at their mutually facing first inner ends, are designed as spherical roller bearings. Spherical roller bearings are a special type of rolling bearing. In one design of a spherical roller bearing, the inner ring runs over rollers arranged in two rows in the outer ring. The bearings are adjustable and not only withstand high loads but also compensate for misalignment. Spherical roller bearings can have split components, which makes them easier to install and remove. In the design of an axial spherical roller bearing, single-row, adjustable roller bearings are used. They consist of solid shaft and housing discs and asymmetrical barrel rollers with cages. The cage holds the roller assembly together with the shaft disc. The bearings are separable.This allows the bearing components to be installed separately.

[0022] According to one embodiment of the invention, the bearings connected to the segment, in which the sections of the transverse screw conveyor are supported at their outer second ends, are designed as spherical roller bearings. Using spherical roller bearings at the outer second ends of the sections yields the same advantages described above as using them at the facing inner first ends of the transverse screw conveyor sections. The spherical roller bearings can be used on only one side of a transverse screw conveyor, but it is also possible to use them at both outer and inner ends of a section.

[0023] According to one embodiment of the invention, the transverse auger has a number of conveying paddles distributed around its outer circumference in the area of ​​the transfer opening. These paddles project radially beyond the outer surface of the auger section. When the transverse auger rotates, the conveying paddles carry the crop within their effective range along in the direction of rotation and convey it through the transfer opening into the inclined conveyor of the harvesting machine. In this way, the conveying paddles redirect the flow of the crop from a conveying direction perpendicular to the working direction to a direction opposite to the working direction.

[0024] According to one embodiment of the invention, the conveying paddles are arranged only on the inner sections of the transverse auger. The inner auger section is the section closest to the transfer opening. By arranging the conveying paddles only on the inner auger sections, the outer auger sections can convey the crop in the conventional manner using only the helical web plates attached to them. The web plates formed on the outer auger sections can convey the crop continuously and consistently to the area of ​​the inner auger sections. The deflection of the crop flow by means of the conveying paddles occurs only in the area of ​​the inner auger sections.

[0025] According to one embodiment of the invention, the division between the outer and inner screw sections of a transverse auger is formed in the axial direction of the auger at the edge of the transfer opening. The inner and outer screw sections can then be equipped with conveying elements as needed, for example, with web plates, conveying paddles, and / or controlled conveying tines. While the outer screw sections of the transverse auger only need to convey the crop in one direction, perpendicular to the working direction, and for this purpose, the usual web plates are sufficient, the inner screw sections must be equipped with conveying elements in such a way that the crop is conveyed at least partially to the center of the transfer opening, but is also diverted into the transfer opening and discharged onto the inclined conveyor.This can be achieved, for example, with a suitable number, shape, and orientation of conveying paddles that extend beyond the outer surface of the respective auger section. Optionally, one or more web plates can also be arranged on the inner auger sections. In the transition zone between the outer and inner auger sections, the crop is actively conveyed without dead space or interruption.

[0026] According to one embodiment of the invention, the transverse screw conveyor is driven at its outer second ends. By driving the transverse screw conveyor from the outside, the facing first inner ends of the screw conveyor sections can almost touch each other in the area of ​​the stationary bearing on the support frame, without the need to maintain a gap to allow a drive element to pass between the first inner ends of the sections and the screw conveyor shaft. This also reduces any dead space between the facing first inner ends of the screw conveyor sections to an unavoidable minimum.

[0027] According to one embodiment of the invention, the harvesting header has a central segment and two lateral segments connected to the central segment by pivots, and the central segment has a smaller working width than the lateral segments. By keeping the working width of the central segment narrower than the working widths of the outer segments in a three-part harvesting header, the height differences between the transverse auger and the conveying trough are reduced in the transition area between the segments during pivoting movements of the outer segments.

[0028] According to one embodiment of the invention, the second outer ends of the sections are each supported in segment-side bearings, which are arranged at a distance from the outer side wall of the sections and offset inwards. The segment-side bearings therefore do not have to be located in the area of ​​the outer side walls of the sections, but can also be offset inwards. This inward offset arrangement results in a more favorable weight distribution within the harvesting attachment and a load-appropriate distribution of the forces acting on the transverse auger.

[0029] It should be noted that the aforementioned embodiments of the invention can each be combined individually, as well as with each other, with the subject matter of claim 1 and the other dependent claims, provided that there are no technical obstacles and no mandatory dependencies.

[0030] Further modifications and embodiments of the invention can be found in the claims, the description and the drawings.

[0031] The invention will be explained in more detail below using an exemplary embodiment. The figures shown are: Fig. 1: An overall view of a two-segment harvester header, Fig. 2: A view of a harvesting attachment with one segment folded downwards and one in the normal position, Fig. 3: An enlarged view of the area of ​​division of the downward-folded segment, Fig. 4: An enlarged view of the transfer opening area showing the bearing of the transverse screw conveyor sections and the conveyor paddles on the transverse screw conveyor sections, and Fig. 5: A schematic diagram of a three-part harvesting attachment.

[0032] The Fig. Figure 1 shows a harvesting attachment 2 with a support frame 4, on which an interface 20 is formed for attachment to a harvesting machine 6 that does not form part of the harvesting attachment 2. The in Fig. The harvesting header shown as an example is a corn picker for 16 rows of corn. Fig. Figure 1 shows only one inclined conveyor 8 of a combine harvester from the harvesting machine 6.

[0033] The harvesting header 2 has a transfer opening 10 for transferring picked-up and conveyed crop to the harvesting machine 6. The transfer opening 10 is bounded horizontally by lateral edges 30. The harvesting header 2 has a working width 12, which extends in a direction transverse to the working direction 18 of the harvesting header 2. At least two segments 14 are pivotally connected to the support frame 4, each extending over a partial working width 16 of the harvesting header 2 and each having conveying elements 22 for picking up and conveying crop. In the exemplary embodiment, each segment 14 has eight picking rows, which are pivotally movable with the segment 14. Conveying elements 22 can be, for example, infeed chains, reels, belt conveyors, and the like.

[0034] A conveying element 22 is designed as a multi-part transverse auger 24 extending at least approximately across the working width of the header 2. It is designed to convey crop picked up by the header 2 towards the transfer opening 10 by means of helically arranged web plates 26. In the area of ​​the transfer opening 10, the transverse auger 24 has a central division into two sections 24a and 24b, the opposing inner first ends 32 of which are supported in bearings 36. These bearings are fixedly connected to the support frame 4 and are located in a position in the working direction 18 in front of the transfer opening 10 and, in the vertical direction, at or above the level of the transfer opening 10. The first inner ends 32 of sections 24a, 24b of the transverse screw conveyor 24, which face each other in the area of ​​the transfer opening 10, are mounted in the bearings 36 in a manner that prevents axial displacement.The bearings 36, which are fixedly connected to the support frame 4 and in which the transverse screw conveyor 24 is supported at its mutually facing first inner ends 32 of the sections 24a, 24b of the transverse screw conveyor 24, can be designed as spherical roller bearings.

[0035] The two sections 24a, 24b can be pivoted about associated pivot axes 28, which are located in Fig. The transverse screw conveyor 24 is indicated by dashed lines. The outer second ends 34 of sections 24a and 24b are each connected to the segment 14 corresponding to the respective section 24a and 24b of the transverse screw conveyor 24. The outer second ends 34 of sections 24a and 24b are supported in bearings 38 so as to be axially non-displaceable. The bearings 38 connected to the segment 14, in which the transverse screw conveyor 24 is supported at its opposite outer second ends 34 of sections 24a and 24b, can be designed as spherical roller bearings. The transverse screw conveyor 24 can be driven at the outer second ends 34 of sections 24a and 24b.

[0036] The Fig. 2 shows a view of one in Fig. The harvesting attachment 2 shown in Figure 1 is shown, with one segment 14 folded down about the pivot axis 28, while only the other segment 14 is in its normal position. The other segment 14 can also be folded down as needed and continuously, and both segments can be pivoted upwards individually or together from their normal position as needed and continuously. Sections 24a and 24b of the transverse auger 24 each have a further division 40 in their direction of extension, dividing them into an inner auger section 42 and an outer auger section 44. These auger sections 42 and 44 can be telescopically extended relative to each other via the division 40, thus making the transverse auger 24 variable in length in its direction of extension. Appropriate sliding bearings can be provided within the transverse auger 24 to enable this telescopic movement.

[0037] The Fig. Figure 3 shows an enlarged view of the area of ​​the division 40 of the downwardly folded segment 14. The casing of the transverse screw conveyor 24 is also closed in the area of ​​the division 40 in the downwardly folded position of the segment 14, although the inner screw section 44 and the outer screw section 42 are slightly separated in this folded position compared to the normal position. This is possible because the outer screw section 42 of the transverse screw conveyor 24 is the screw section with a cavity 46 formed therein, into which the inner screw section 44 can immerse during a retraction movement and shortening of the segment 14.

[0038] The Fig. Figure 4 shows an enlarged view of the area of ​​the transfer opening 10 with the bearing of the sections 14 of the transverse screw conveyor 24 and the conveying paddles 48 on the sections 14 of the transverse screw conveyor 24. The transverse screw conveyor 24 has a number of conveying paddles 48 distributed around its outer circumference in the area of ​​the transfer opening 10, which project radially beyond the outer surface of the screw sections 42, 44. In the illustrated embodiment, the conveying paddles 48 are arranged only on the inner screw sections 44 of the transverse screw conveyor 24.

[0039] The division 40 between the outer and inner screw section 42, 44 of a section 24a, 24b of a transverse screw conveyor 24 is formed in the illustrated embodiment in the axial direction of the transverse screw conveyor 24 in the edge region of the transfer opening 10 and not in a region that is away from the transfer opening 10 in the axial direction of the transverse screw conveyor 24.

[0040] The Fig.Figure 5 shows a schematic diagram of a three-part harvesting header 2 with a central segment 14a and lateral segments 14b and 14c connected to it by hinges. The central segment 14a has a smaller working width 16a than the lateral segments 14b and 14c, which have working widths 16b and 16c, respectively. In the illustrated embodiment, the working width 16a is wider than the transfer opening 10, but it can also be narrower. The harvesting header 2 has a rotating transverse auger 24 with a first section 24a and a second section 24b. The sections 24a and 24b of the transverse auger 24 are each telescopically extendable via the division 40. The transverse screw conveyor is supported in the support frame side bearing 36 by the first inner ends 32 of sections 24a, 24b.The second outer ends 34 of sections 24a, 24b are each mounted in segment-side bearings 38, which, in the illustrated embodiment, are arranged offset inwards at a distance from the outer side wall 50 of sections 24a, 24b. In the area of ​​the transfer opening 10, the transverse auger 24 has conveying paddles 48 that redirect the flow of the harvested crop conveyed inwards by the transverse auger 24 into the transfer opening 10, from where it is conveyed to the downstream harvesting machine.

[0041] The invention is not limited to the embodiment described above. It will be easy for a person skilled in the art to modify the embodiment in a way that appears suitable to them in order to adapt it to a specific application. Reference symbol list 2 Harvester attachment 4 support frames 6 harvesting machine 8 inclined conveyors 10 Handover opening 12 working width 14 segments 16 partial working width 18 Working direction 20 interface 22 Discharge organ 24 transverse screw conveyor 24a Section of the transverse screw conveyor 24b Section of the transverse screw conveyor 26 web plate 28 Swivel axis 30 outer edges of the transfer opening 32 first inner ends of the sections 34 second outer ends of the sections 36 support frame side bearing 38 segment-side bearing 40 division 42 outer snail section 44 inner snail section 46 cavity 48 conveyor paddles 50 outer side wall QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] US 2014 / 0137529 A1 [0002, 0003] DE 10 2017 113 775 A1

[0006]

Claims

[1] Harvesting header (2) with a support frame (4) on which an interface (20) for attachment to a harvesting machine (6) that does not form a part of the harvesting header (2) is formed, the harvesting header (2) has a transfer opening (10) for transferring picked-up and conveyed harvested material to the harvesting machine (6), the harvesting header (2) has a working width (12) which extends in a direction transverse to the working direction (18) of the harvesting header (2), at least two segments (14) are pivotally connected to the support frame (4), each extending over a partial working width (16) of the harvesting header (2) and each having conveying elements (22) for picking up and conveying harvested material, a conveying element (22) is designed as a multi-part transverse auger (24) extending at least approximately over the working width of the harvesting header (2), which is designed toThe harvested crop (2) is conveyed by the harvesting header (2) towards the transfer opening (10) by means of helically arranged web plates (26), the transverse auger (24) has a central division into two sections (24a, 24b) in the area of ​​the transfer opening (10), the mutually facing inner first ends (32) of which are supported in bearings (36) which are fixedly connected to the support frame (4) and which are located in a position in the working direction (18) in front of the transfer opening (10) and in a vertical direction at the level of or above the transfer opening (10), and the transverse auger (24) is connected at the outer second ends (34) of the sections (24a, 24b) to the segment (14) which is assigned to the respective section (24a, 24b) of the transverse auger (24), , characterized by, that the first inner ends (32) of the sections (24a, 24b) of the transverse screw conveyor (24) facing each other in the area of ​​the transfer opening (10) are mounted in the bearings (36) so as not to be displaceable in the axial direction, the outer second ends (34) of the sections (24a, 24b) are supported in the bearings (38) so as not to be displaceable in the axial direction, and the sections (24a, 24b) of the transverse screw conveyor (24) each have a further division (40) in their extension direction into an outer and inner screw section (42, 44) by means of which these screw sections (42, 44) are telescopic to each other and by means of which the transverse screw conveyor (24) is variable in length in its extension direction. [2] Harvesting header (2) according to claim 1, characterized by , that the outer screw section (42) of a transverse screw conveyor (24) is the screw section with the cavity (46) into which the inner screw section (44) can immerse. [3] Harvesting header (2) according to claim 1 or 2, characterized by , that the bearings (36) which are fixedly connected to the support frame (4) and in which the transverse screw conveyor (24) is supported at its mutually facing first inner ends (32) of the sections (24a, 24b) of the transverse screw conveyor (24) are designed as spherical roller bearings. [4] Harvesting header (2) according to any one of the preceding claims, characterized by , that the bearings (38) connected to the segment (14), in which the transverse screw conveyor (24) is supported at its mutually opposite outer second ends (34) of the sections (24a, 24b), are designed as spherical roller bearings. [5] Harvesting header (2) according to any one of the preceding claims, characterized by, that the transverse screw conveyor (24) has a number of conveying paddles (48) distributed around the outer circumference of the transverse screw conveyor (24) in the area of ​​the transfer opening (10), which project in a radial direction beyond the outer shell of the screw section (42, 44). [6] Harvesting header (2) according to claim 5, characterized by , that the conveying paddles (48) are arranged only on the inner screw sections (44) of the transverse conveying screw (24). [7] Harvesting header (2) according to any of the preceding claims, characterized by , that the division (40) between the outer and inner screw section (42, 44) of a section (24a, 24b) of a transverse screw conveyor (24) is formed in the axial direction of the transverse screw conveyor (24) in the edge region of the transfer opening (10). [8] Harvesting header (2) according to any one of the preceding claims, characterized by , that the transverse screw conveyor (24) is driven at the outer second ends (34) of the sections (24a, 24b). [9] Harvesting header (2) according to any of the preceding claims, characterized by , that the harvesting header (2) has a central segment and two lateral segments (14) connected laterally by hinges to the central segment (14), and the central segment has a smaller partial working width (16) than the lateral segments (14). [10] Harvesting header (2) according to any one of the preceding claims, characterized by , that the second outer ends (34) of the sections (24a, 24b) are each supported in segment-side bearings (38) which are arranged offset inwards at a distance from the outer side wall (50) of the sections (24a, 24b).

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