DE29619474U1 - Beet harvester - Google Patents

Description

Dipl.-irig. A. Wasmeier Dipl.-lng. H. Graf

Admitted to the European Patent Office · Professional Representatives before the European Patent Office

Patent Attorneys PO Box 10 08 26 93008 Regensburg

German Patent Office Zweibrückenstr.

80297 Munich D-93008 REGENSBURG P.O. BOX 10 08 26

D-93055 REGENSBURG GREFLINGERSTRASSE 7

Telephone (0941)79 20

(0941)79 20

Fax (0941)79 5106

Telegram Begpatent Rgb.

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H/g 16.747a

Date
Date

11 November 1996 W/He

Applicant:

Alfons Holmer Regensburger Strasse 84069 Eggmühl

Title:

Beet harvester

Accounts: Bavarian Vereinsbank (bank code 750 200 73) 5 839 Postgiroamt Munich (bank code 700 100 80) 893 69-801 Place of jurisdiction Regensburg A16747.DOC

Beet harvester

The innovation concerns multi-row beet harvesters. Such beet harvesters have an extremely high deadweight and exert a high ground pressure on the harvested area in the track laid by the front and rear wheels one after the other, which leads to strong soil compaction. Wide tires are therefore used on such machines in order to transfer the deadweight of the machine with bunker to a larger ground area.

The aim of the innovation is to design a beet pre-harvesting machine of the generic type in such a way that the ground pressure is significantly reduced while the dead weight remains high and that a space-saving arrangement of the sieve wheels in conjunction with the front and rear wheels, which are designed as steering wheels, is achieved.

A reduction in ground pressure is achieved while the harvester's own weight is maintained according to the innovation with the features of the characterizing part of claim 1. The machine is operated with offset front and rear wheels, which are designed as steering wheels and can be set at such an angle to the main axis of the harvester frame that the individual wheels each run in a track separate from the track of the other wheels, in such a way that the adjacent tracks of all wheels essentially fill the entire area traveled over by the machine, so that the harvesting area is traveled over a wide area. With appropriately selected wide tires and appropriately set track offset angle, this results in a largely even soil consolidation. This exerts minimal ground pressure on the harvesting area traveled over, since the wide tires of the rear wheels each run one tire width out of the track of the front wheels compared to the front wheels.

Since the lifting unit must move at right angles to the rows of beets in the crop when lifting, in one version of the new beet harvester the machine frame is arranged in an articulated manner behind the front wheel axle, i.e. as an articulated

steered frame, and the wheels of the rear axle are adjusted by the same angle of attack relative to the frame axis and relative to the rear wheel axle, which is arranged at a right angle to the longitudinal axis of the main frame. Such an articulated frame also improves the manoeuvrability of the harvester, as it allows an extremely small turning circle to be driven.

In another embodiment of the beet harvester according to the innovation, a conventional, rigid frame is provided on the articulated frame, the front and rear wheel axles of which are arranged at right angles to the main longitudinal axis, but the lifting unit is pivotably arranged on the main longitudinal frame, so that in offset operation the front and rear wheels are adjusted relative to the front axle and the rear wheel axle at the same angle as the lifting axle is adjusted to the machine axis.

Furthermore, the innovation solves the problem that adjusting the wheels and the lifting unit requires additional space to swivel the wheels and the lifting unit in order to prevent them from getting in the way of each other. Due to the articulated steering of the frame, it is necessary to move the screen stars relative to each other and to the frame in order to achieve optimum use of space. To do this, at least one of the screen wheels is attached to a wishbone at the pivot point, which is firmly connected to the rear part of the frame. An additional link is provided for height stabilization. The screen wheels are connected to each other and can be moved loosely relative to the frame.

The articulated joint in the frame, on which the rear part of the frame, which also houses the beet bunker, can be pivoted, is a joint bearing that allows a pivoting and pendulum movement of the frame. The extent of the pivoting and pendulum movement of the joint bearing is limited by stops. The pivoting movement of the rear frame part relative to the fixed, front frame part takes place via steering cylinders that are arranged between the front and rear frames and that work in synchronism.

The innovation is shown in more detail in the drawing. It shows:

Fig. 1 a top view of a beet harvester with articulated frame,

Fig. 2 is a schematic representation of the articulated frame,

Fig. 3 is a schematic representation of a modified embodiment in which instead of an articulated frame, the harvester unit is pivotably mounted on the main frame,

Fig. 4 in side view and in principle representation of the articulated joint with the intake of the screen stars, and

Fig. 5. A schematic view of the steering cylinders on the frame.

The beet harvester is designated in Fig. 1 with 1, which includes the lifting unit 2, the chassis with driver's cab 3, the front wheels with front wheel axle 4, the machine frame 5, which consists of a front frame part 6, a rear frame part 7 and an articulated joint 8, and the rear wheels 9 with rear wheel axle.

Figures 2 and 3 show two different embodiments of the innovation. According to Figure 2, the machine works in such a way that the front wheels and the rear wheels run in the direction of travel and in the longitudinal axis of the machine, with the front wheels and the rear wheels running offset from each other in the transverse direction, such that the rear wheels are each offset by approximately one wheel width from the front wheels. This mode of operation is achieved by the front and rear parts of the machine frame being able to pivot about an articulated joint at a pivot angle α, so that the front and rear wheels or front wheel groups and rear wheel groups run on gaps, and the weight of the machine, especially when the bunker is full (which is not shown, but is taken up by the rear machine frame), exerts as uniform a load on the ground as possible and thus a uniform

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Since the rear wheels are designed as steering wheels in addition to the front wheels, the rear wheel axis is offset by an angle of α to the transverse axis, while at the same time the rear wheels are offset by an angle of α to the rear wheel axis, so that all four wheels or wheel groups run parallel to the machine's longitudinal axis.

In the embodiment according to Fig. 3, the rear frame part is arranged in the machine's longitudinal axis and the front frame part with the harvesting tools, the driver's cabin and the front wheel axle is pivoted by an angle α. At the same time, the rear wheel axle with the rear wheels is pivoted by the same angle α and parallel to the front wheel axis relative to the machine's longitudinal axis, so that here too the wheels of the front axle and the rear axle run with a gap between them.

The connection of the front frame and the rear frame of the machine is shown schematically in Fig. 4. The front frame 10 (or 6) accommodates double hinges 11, 11', which are coupled to the rear frame 12 via the main bearing parts 13 and steering connections 14. 15 represents a parallelogram guide which is attached to a sieve star carrier 16, which accommodates a drive motor 17 and is coupled to the double hinge 1T via a bearing point 18 and a steering connection 19. 20 designates a connecting support which is attached to the front frame 10 and to the sieve star carrier. The parallelogram guide 15 carries the sieve grate 21, while the sieve stars 22, 23 and 24 are connected to the sieve star carrier 16 and the drive motor 17. Steering cylinders 25, 26 are attached to the rear frame 12, which are connected to the double hinge 11 and work in counter-rotation, i.e. one steering cylinder 25 is extended to carry out a steering operation and the opposite steering cylinder 26 is retracted to the same extent. Alternatively, only one steering cylinder can be provided with the corresponding implementation.

Claims (10)

Protection claims 1. Beet harvester which, due to its high deadweight and total weight, exerts a high ground pressure on the ground surface it travels over via the front and rear wheels, characterized in that a) front and rear wheels are designed to be adjustable in track, (b) the front and rear wheels are longitudinal wheels, and c) the machine frame is designed to be adjustable at an angle to the longitudinal axis of the harvesting machine. 2. Machine according to claim 1, characterized in that the tires of the front and rear wheels are wide tires, and that the rear wheels can be adjusted transversely to the longitudinal axis of the frame so as to be offset by one tire width relative to the front wheels. 3. Machine according to claim 1 or 2, characterized in that the machine frame is a two-part frame, that the two frame parts are connected to one another in the machine's longitudinal axis by an articulated joint, and that the articulated joint is arranged close behind the front wheel axle. 4. Machine according to one of claims 1 - 3, characterized in that the front frame part is fixed and the rear frame part is pivotable. 5. Machine according to one of claims 1 - 3, characterized in that the front frame part is pivotable and the rear frame part is fixed. 6. Machine according to claim 5, characterized in that the front wheel axle and rear wheel axle are designed to be pivotable relative to the fixed frame part. 7. Machine according to one of claims 1 - 6, characterized in that the machine front part and the front wheel axle are arranged to be pivotable together about a joint, and that the rear wheel axle is arranged to be pivotable at the same angle. 8. Machine according to one of claims 1 - 7, characterized in that the front and rear frame parts are coupled to one another via a joint bearing, a hinge arrangement arranged on the front frame part and a handlebar guide. 9. Machine according to one of claims 1 - 8, characterized in that the sieve grate and sieve stars are coupled to the front frame part via a parallelogram guide, a hinge arrangement arranged on the front frame part and a handlebar guide via a support arrangement with the front frame part. 10. Machine according to one of claims 1 - 9, characterized in that a pair of steering cylinders is arranged between the hinge arrangements and the rear frame part, and that the steering cylinders work in counter-rotation and enable an angular movement between the front and rear frame parts.