DE8801208U1 - Oscillating straw deflector - Google Patents

Description

8467 GFR

DEEEE & COlteAilY - 1"-

1 John Deere Road
Moline, Illinois 61265
USA

Deflector device for a mobile hash machine

The invention relates to a deflection device for a mobile machine with a discharge housing for scatterable material, wherein at least one deflection element is arranged on the outlet side of the discharge housing.

Such deflection devices are particularly known from combine harvesters and are used there to gather the straw ejected from the combine harvester housing into a narrow swath on the ground (BISO, Bitter GmbH & Co KG, Precision made in Germany, The new BISO system). Depending on the width of the combine harvester housing in the straw discharge area, more or fewer deflection elements of the deflection device are provided on one or two sides. The individual deflection elements are rigidly attached to the combine harvester housing and are located in front of or behind a chopping unit in relation to the direction of travel of the combine harvester.

The deflection devices known to date have proven to be disadvantageous in that they do not allow the straw to escape unhindered when the combine harvester has to stop during harvesting and several times the amount of straw that would otherwise accrue accumulates in the discharge area. This straw is then held by the deflection device and may lead to a backlog in the combine harvester housing.

The object underlying the invention is to design the deflection device in such a way that even in the case of an excessively high amount of material, e.g. straw, clogging does not occur when the machine stops and then continues driving again.

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The object has been achieved according to the invention by the teaching of claim 1.

In this way, the deflector elements can swing away as the machine continues to move and clear the outlet opening at the discharge end. As soon as the usual amount of material is ejected again, the deflector elements swing back into the normal working position.

The features listed in the subclaims further develop the invention and give it further advantages. In particular, the deflector elements can even swing into the dispensing housing if they are bent away from its wall. This makes it possible to bring the deflector elements into position within the dispensing housing at a suitable location, such as a chopping unit, in order to clear access to the dispensing housing for maintenance purposes or the like.

The installation of springs that force the deflector elements back into their working position, i.e. in which the swath is to be formed, ensures that they swing back into the specified position even if there is greater flow resistance from the ejected material. The installation on one or the other side of the unit does not allow the deflector elements to swing into a position in which they are ineffective or disruptive. If no unit is available, stops can be provided instead.

If each deflector element can pivot independently of the others, the entire deflector device can more easily adapt to or avoid the accumulation of material, regardless of whether they are spring-loaded or not.

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Although such deflection devices can be used primarily on combine harvesters, it is nevertheless possible to use them in particular on swath mowers, mower conditioners, manure spreaders or other spreaders.

The drawing shows an embodiment of the invention described in more detail below. It shows:

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in a driving state with a deflection device according to the invention and an aggregate in longitudinal vertical section and in a schematic representation,

Figure 2 shows the deflection device from Figure 1 in an enlarged view and in different positions,

Figure 3 shows a deflection element of the deflection device in section along the line 3-3 in Fig. 2 and in the direction of the corresponding arrows,

Figure 4 is a similar representation to Figure 1, but with the machine stationary,

Figure 5 is a similar representation as in Figure 1, but with the machine starting up.

A machine 10 shown in Figure 1, which can be seen there as a combine harvester, has a discharge housing 12, a conveyor element 14 arranged within it in the form of shakers, a chassis 16, a deflector device 18 and an aggregate 20 in the form of a chopper. Arrows 22 arranged inside the discharge housing 12 indicate the material flow of the material 24 discharged onto the ground by the conveyor elements 14. A large arrow 26 indicates the direction in which the machine 10 moves for harvesting.

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In Figure 1, one can also see a free space 28, which is limited at the front by the discharge end of the conveyor elements 14, at the rear by the front edge of the unit 20, at the top at the side by the discharge housing 12 and at the bottom at the side by the deflector device 18. The material 24 discharged by the conveyor elements 14 is conveyed through this free space 28 and falls to the floor.

The deflection device 18 here consists of a front and a rear deflection element 30, which extend from the lower edge area of the dispensing housing 12. It is also possible to provide more or fewer deflection elements 30. As can be seen in particular from Figure 3, the deflection elements 30 are bent and have an upper short leg and a lower long leg 32 and 34, with the lower leg 34 extending into the free space 28. The upper leg 32 extends along the wall 36 of the dispensing housing 12 and in the area of its contact surface an opening 38 leads through the leg 32 and an opening 38' through the wall 36, which accommodate a screw 40.

The opening 38 has a square cross-section and the opening 38* has a round cross-section.

The screw 40 is designed as a carriage screw, the flat head 42 of which is located towards the free space 28 in order to generate as little frictional resistance as possible for the item 24, and the locking square of which is held in the opening 38 in the leg 32. To fasten the screw, a self-locking nut 44 is preferably used, between which a washer 46 is inserted and the wall 36. However, a normal nut 44 could also be used, which is permanently secured against rotation relative to the screw 40 in another way.

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For its assembly, the deflector element 30 is placed on the − side of the wall 36 in such a way that the lower leg 34 points towards the free space 28 and the openings 38, 38' coincide. Then the screw 40 is guided from the free space 28 through the opening 38 in the leg 32 and the opening 38' in the wall 36, the washer 46 is placed on and the nut 44 is screwed on. If the deflector element 30 is held while the cutter 44 is tightened, the screw 40 cannot rotate due to the square locking mechanism. When tightening the nut 44, it is important to ensure that the deflector element 30 has a firm hold on the wall 36, but can also still pivot with the screw 40 without any great effort.

Figure 2 clearly shows that and how far the deflection elements 30 can pivot about the screws 40. According to Figure 2, the pivoting movement is limited in one direction by the system on the underside of the unit 20 and in the other direction by the system on the top. The system on the top corresponds to an inoperative or maintenance position (&Idigr;&Igr;&Igr;), while the system on the bottom corresponds to an alternative position (II) as can be seen from a situation according to Figure 5. The third position, indicated in solid lines, corresponds to the operating position (I).

The function of the deflection device 18 in interaction with ejected material 24 can be described as follows.

As the machine 10 moves over the ground under normal harvesting conditions, the material 24 EU accumulates in a mat shown in Figure 1 and remains on the ground in the form of a swath.

Figure 4 shows the situation that occurs when the machine 10 has to be stopped during operation.

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In this case, material 24 is still processed by the hash machine 10 and released into the free space 28 when it has already come to a standstill. However, since the hash machine 10 is standing still, the material 24 remains on the floor below the free space 28, collects there in heaps and builds up into the free space 28. The material 24 presses against the deflection elements 30 and is held by them.

Figure 5 illustrates the process as it occurs when the hash machine 10 moves on again. The material 24, which is now compressed into a compact pile, holds the deflector elements 30 when the hash machine 10 moves on and swings them backwards until they rest against the unit 20. In this way, the lateral limitation of the free space 28 below the lower edge of the discharge housing 12 is removed and the material 24 can exit the discharge housing 12 unhindered; a blockage does not occur.

As soon as the excess quantity of material 24 has been removed, the deflection elements 30 swing back into their operating position (I) shown in Figure 1.

Depending on the circumstances, springs (not shown) can be provided between the deflector elements 30 and the dispensing housing 12, which swing the deflector elements 30 back into the operating position (I) shown in Figure 1.

In another embodiment of the invention, the deflection elements 30 can also be designed as spring rods or the connection by means of the screw 40 can be replaced by a spring joint connection. When designed as a spring rod, the openings 38, 38*, the screw 40, the nut 42 and the disk 46 can be omitted.

The term tear-off device ID used above includes the arrangement of deflector elements on one side of the free space 28 as well as on both sides thereof.

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Claims (6)

8467 GFR Protection claims 1. Deflector device (18) for a mobile machine (10) with a delivery housing (12) for scatterable material (24), wherein at least one deflector element (30) is arranged at the output of the delivery housing (12), characterized in that the deflector element (30) is arranged to be movable in the direction of travel, 2. Deflecting device according to claim 1, characterized in that the deflecting element (30) is bent towards a free space (28) in the dispensing housing (12). 3. Deflecting device according to claim 2, which is arranged in front of an aggregate (20), in particular a chopping aggregate, as seen in the working travel direction of the machine (10), characterized in that the deflecting element (30) can be brought into contact with the aggregate (20) in an evasive position (II) and/or in an inoperative position (III). 4. Deflecting device according to one or more of the preceding claims, characterized in that the deflecting element (30) is urged into an operating position (I) by means of springs. 5. Deflecting device according to one or more of the preceding claims, characterized in that if there are several deflecting elements (30), each one can be pivoted independently of the remaining one. 6. Deflecting device according to one or more of the preceding claims, characterized in that the deflecting element (30) is designed as a spring rod. Il Il I t · I Il # « · I III« &igr; ||·<· &bull;&bull;&bull;&bull;I t · ····