Harvesting attachment

Abstract

The invention relates to a harvesting attachment (1) for a harvesting machine, comprising a light-metal frame (3) which forms a trough (2) and comprises a trough wall (4) on the trough side and a rear wall (5) on the trough rear side, the walls being connected to each other by means of struts. In order to create advantageous design conditions, the invention proposes that the trough wall (4) and the rear wall (5) are formed by light-metal sheets between which light-metal sheet struts (6, 6') are arranged, both of which are welded to the trough wall (4) and to the rear wall (5).

Description

[0001] Harvesting attachment

[0002] Technical field

[0003] The invention relates to a harvesting attachment for a harvesting machine with a frame made of light metal forming a trough, which includes a trough wall on the trough side and a rear wall on the trough rear side, which are connected to each other by struts.

[0004] State of the art

[0005] Such a harvesting header is known from DE 102010 052 816 A1. The frame of the harvesting header is designed to accommodate harvesting tools, in particular a cutting unit and a reel. The harvesting header can be attached to a harvesting machine, especially a combine harvester. During harvesting, the harvesting header is moved across a field in one direction by the harvesting machine, crops are harvested, and, for example, fed by means of a reel and intake auger into a crop tunnel, through which the crop is conveyed into the harvesting machine. For example, the harvesting header comprises a cutting unit, a reel, a cutter bar, stalk dividers and / or side cutters, and / or other necessary components. The harvesting header can include a corn adapter or an adapter for other crops. This known frame is designed as a continuous cast profile.This frame therefore has a reduced weight and / or sufficient strength compared to steel constructions. Thus, the header can be lighter for a given working width compared to previously known headers. However, since the trend is towards ever-larger working widths and the weight of the harvesting machine must be kept as low as possible to minimize soil compaction, this design also reaches its limits. The maximum working width of a header is limited by the stability of the structure. Axial moments of inertia, for example, play an important role here, as they represent a measure of the header's cross-sectional resistance to bending. Furthermore, acting torsional forces must also be considered when dimensioning the header.Since widening the harvester header is associated with a continuous increase in its own weight, the forces acting on the harvester header, especially the bending moment, also increase.

[0006] Description of the invention

[0007] The invention is therefore based on the objective of proposing an improved light metal frame for a harvesting attachment of the type mentioned above, which, with high structural stiffness, in particular bending and torsional stiffness, has a lower weight compared to known harvesting attachments.

[0008] The invention solves the stated problem by forming the trough wall and the rear wall from light metal sheets, between which light metal sheet struts are arranged and welded to both the trough wall and the rear wall. This makes it possible to create a harvesting attachment that, while possessing high bending and torsional stiffness, is lighter than known harvesting attachments.Thus, in areas of higher stress, particularly in the header mounting area where the header is coupled to the harvesting machine, stronger and potentially multiple lightweight metal struts and thicker lightweight metal sheets can be provided than in less stressed areas, such as the outer edge regions, where the number of lightweight metal struts and material thicknesses can be reduced. This makes it possible to design the header as a support of at least approximately the same strength in the direction of the horizontal trough cross-section and around this axis. The lightweight metal struts are welded to both the trough wall and the rear wall, preferably by spot welding or by means of weld seams. Weldable lightweight metal, preferably weldable aluminum (alloys), is used as the lightweight metal.

[0009] The lightweight metal sheet struts preferably comprise trapezoidal sheet profiles, hat profiles, or C-profiles, which are welded at the top and bottom to the lightweight metal sheets of the trough wall as well as the rear wall. The trapezoidal shape increases the torsional stiffness in the horizontal transverse direction of the trough.

[0010] To create a stable frame at the edges that will not be damaged even in minor collisions with obstacles, etc., the frame can be provided at the edges with lightweight metal sheet struts made of fully enclosed lightweight metal sheet profiles, which are welded to the lightweight metal sheets of the trough wall as well as the rear wall.

[0011] To allow flexibility regarding the header width and, for example, to implement different header widths using a modular system, the frame can consist of frame segments connected to one another in the transverse direction of the trough, preferably via flanges. Flanges are right-angled protruding edges that serve to connect two flush-fitting components.

[0012] For advantageous load distribution in the frame structure, the longitudinal axes of the light-alloy sheet metal struts can run at an angle of 15 to 45° to a horizontal transverse direction of the trough. For example, the light-alloy sheet metal struts are arranged radially in the highly stressed frame section immediately adjacent to the harvested crop tunnel.

[0013] Preferably, the lightweight metal sheet struts are laser-welded to both the trough wall and the back wall. This results in a particularly simple manufacturing process, as the lightweight metal sheets of the trough wall and back wall simply need to be placed in contact with the lightweight metal sheet struts, and the welding can be carried out through the lightweight metal sheets. For welding, the laser melts the entire weld area of ​​the lightweight metal sheets and also the contact surface on the lightweight metal sheet struts.

[0014] The lightweight metal sheet struts can have openings in the transverse direction of the trough in the area of ​​the connecting webs, for the purpose of creating cable and / or drive channel ducts. This allows mining equipment, such as winches, shredders, and various sensors, to be supplied with power in a protected manner. Cable and / or drive channel ducts can be inserted into the openings, which significantly simplifies installation and maintenance.

[0015] Brief description of the invention

[0016] The invention is illustrated in the drawing as an example. It shows

[0017] Fig. 1 shows the left half of a harvesting attachment with the back panel removed.

[0018] Fig. 2 shows the harvesting attachment from Fig. 1 in section along line 11-12 with the rear wall attached and

[0019] Fig. 3 shows an enlarged view of a first frame section adjoining a crop tunnel with radially arranged light metal sheet struts.

[0020] Ways to implement the invention

[0021] The harvesting header 1 for a harvesting machine (not shown), in particular a combine harvester, comprises a frame 3 made of light metal forming a trough 2. The frame includes a trough wall 4 on the trough side and a rear wall 5 on the trough rear side, which are connected to each other by light metal sheet struts 6, 6'. A reel h is associated with the harvesting header. The trough wall 4 and the rear wall 5 are formed of light metal sheets, between which the light metal sheet struts 6, 6' are arranged. These struts are spot-welded or welded along a continuous path to both the trough wall and the rear wall by means of weld points 7.

[0022] The light metal sheet struts 6 are in particular trapezoidal sheet profiles, hat profiles and / or C-profiles, which are welded at the head k and foot f to the light metal sheets of the trough wall 4 and rear wall 5.

[0023] The frame 3 can be provided on the edge with light alloy sheet struts 6 made of fully enclosed light alloy sheet profiles 6', which are welded to the light alloy sheets of trough wall 4 and rear wall 5.

[0024] The frame 3 can consist of frame segments A, B connected to one another in the transverse direction 8 of the trough, preferably via flanges 9. The longitudinal axes 10 of the light-alloy sheet metal struts 6 can run at an angle α of 15 to 45° to a horizontal transverse direction 8 of the trough. In particular, in the frame section immediately adjacent to a crop tunnel 11, the light-alloy sheet metal struts 6 extend radially from a base.

[0025] According to the invention, the light metal sheet struts 6 are preferably laser-welded to both the trough wall 4 and the rear wall 5.

[0026] The light alloy sheet struts 6 can have openings 12 in the transverse direction of the trough 8 in the area of ​​the connecting webs, for the purpose of forming cable and / or drive media channels, into which openings 12 cable and / or drive media channels 13 are inserted.

Claims

Patent claims 1. Harvesting attachment (1) for a harvesting machine with a frame (3) made of light metal forming a trough (2), which comprises a trough wall (4) on the trough side and a rear wall (5) on the trough rear side, which are connected to each other by struts, characterized in that the trough wall (4) and the rear wall (5) are formed of light metal sheets, between which light metal sheet struts (6, 6') are arranged, which are welded to both the trough wall (4) and the rear wall (5).

2. Harvesting attachment (1 ) according to claim 1 , characterized in that the light metal sheet struts (6) are trapezoidal sheet metal profiles which are welded at the head and foot end (k, f) to the light metal sheets of the trough wall (4) and rear wall (5).

3. Harvesting attachment according to claim 1 or 2, characterized in that the frame (3) is provided on its edge with light metal sheet struts (6') made of fully enclosed light metal sheet profiles, which are welded to the light metal sheets of the trough wall (4) and rear wall (5).

4. Harvesting attachment according to one of claims 1 to 3, characterized in that the frame (3) consists of frame segments (A, B) adjoining one another in the transverse direction of the trough (8), preferably connected to one another via flanges (9).

5. Harvesting attachment according to one of claims 1 to 4, characterized in that longitudinal axes (10) of the light metal sheet struts (6, 6') run at an angle (a) of 15 to 45° to a horizontal trough transverse direction (8).

6. Harvesting attachment according to one of claims 1 to 5, characterized in that the light metal sheet struts (6, 6') are laser welded to both the trough wall (4) and the rear wall (5).

7. Harvesting attachment according to one of claims 1 to 6, characterized in that the light metal sheet struts (6, 6') have openings (12) in the transverse direction of the trough (8) in the area of ​​the connecting webs for the purpose of forming cable and / or drive medium channels.

8. Harvesting attachment according to claim 7, characterized in that cable and / or drive channel channels (13) are inserted into the openings (12).

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