AT525960A4 - Device for the adaptive height adjustment of a collecting plate on a spiked roller pickup of a pumpkin harvesting machine - Google Patents

Abstract

The invention relates to a device for the adaptive height adjustment of a collection plate (1) on a spiked roller pick-up (2) of a pumpkin harvesting machine, wherein the pumpkin harvesting machine has a frame (3) on which the spiked roller pick-up (2) is rotatably mounted for collecting the pumpkins (13). , and wherein the frame (3) can be connected in an articulated manner to a towing vehicle (5) via a drawbar (4), the angle of inclination of the frame (3) to the ground (6) being via an angle between the frame (3) and the drawbar (4 ) located linear drive (7), for example in the form of a hydraulic cylinder, can be adjusted. The height adjustment device comprises a first hydraulic cylinder (8), which is arranged with its ends between the frame (3) of the pumpkin harvester and the drawbar (4), and a second hydraulic cylinder (9), which is arranged with its ends between the frame (3) and the collection plate (1) is arranged in order to adjust the height of the plate (1) relative to the frame (3). The piston chambers of the first (8) and second hydraulic cylinders (9) and the annular chambers of the first (8) and second hydraulic cylinders (9) are hydraulically connected to one another. The invention further relates to a pumpkin harvesting machine comprising such a height adjustment device.

Description

Altitude guidance.

With automatic pumpkin harvesters, the pumpkins to be harvested must first be pushed into a swath in the field. A pumpkin harvesting machine is then guided along the swath and the pumpkins are pricked using a spiked roller pick-up, the so-called “hedgehog” and transported into the harvesting machine. The spiked roller pickup is a wide drum with a multitude of long spikes on the running surface, which spike the pumpkins as they roll over and ensure that they are taken along the circumference of the spiked roller pickup to a scraper higher up. The pumpkins are usually chopped up in the pumpkin harvester and the seeds removed. The seeds are transported to a storage tank in the harvester for further processing and the chopped pumpkin residue is distributed back to the field. The pumpkin harvesters are pulled by a towing vehicle, for example a tractor, whereby the

Harvesting machine is connected to the tractor via a drawbar.

There is also one between the drawbar and the frame

Pumpkin harvester another connection using a

underground.

Until recently, it was standard for people to walk behind the hedgehog during harvest and pick up pumpkins that were left lying around and feed them back to the hedgehog by hand or with forks. In order to save on these additional workers, there have been collection plates for some time now, so-called hedgehog shields, hedgehog plates or hedgehog collecting plates, which are mounted behind the hedgehog and which prevent pumpkins that have not been pierced or have only been pierced poorly from remaining lying around. These collective plates essentially describe a cylinder jacket section and are arranged essentially concentrically to the spiked roller receiver. Essentially concentric means that the pivot axis for the collecting plate can also be arranged a few centimeters next to the axis of rotation for the spiked roller receiver. To be effective, the collection plates must be positioned a few centimeters above the ground and at a short distance from the spiked roller pickup itself

no pumpkins will be allowed through.

To ensure that the collection plate is always at the correct distance from the ground, it is necessary that the height of the collection plate is continually adjusted to the conditions due to the uneven ground in the field or the set inclination of the pumpkin harvester. So far this has been solved by

that the collection plate can be pivoted on the axis of rotation of the hedgehog

which force the sign at the correct distance from the ground.

The ground in the swath is often moist during harvest, for example from morning dew, rain or even from ripe and overripe pumpkins. However, moist soil sticks to the support wheels and rollers, which makes additional scrapers necessary, which, however, are increasingly displaced during operation due to moist soil in combination with plant residues, which leads to difficulties and more frequent downtime

Harvester leads.

The aim of the present invention is to improve this adaptive height adjustment so that contact with the ground using support wheels is no longer necessary, but rather the collection plate is always guided at the correct distance from the ground. The device should be simple and inexpensive to construct in order to enable retrofitting to existing pumpkin harvesting machines. As far as possible, the device should be able to be coupled to the existing hydraulic systems of the towing vehicle or the pumpkin harvesting machine itself. Another aim of the invention is to create a pumpkin harvesting machine with such an adaptive

Height adjustment device.

This object is achieved by the present invention in that the height adjustment device has a first hydraulic cylinder, which is arranged with its ends between the frame of the pumpkin harvester and the drawbar, and a second hydraulic cylinder, which is arranged with its ends between the frame and the collection plate, to adjust the height of the shield relative to the frame, wherein the piston chambers of the first and second hydraulic cylinders and the annular chambers of the first and second hydraulic cylinders are hydraulically connected to one another. If there are bumps when driving in the field with a towing vehicle with a pumpkin harvester attached to it, this will have a direct effect on the inclination of the drawbar

Tractor vehicle and harvester. The first and second

to set the correct height of the collection plate at any time.

It is a further preferred feature that the hydraulic connections between the first and second hydraulic cylinders are connected to a hydraulic system of the towing vehicle or of the pumpkin harvesting machine via at least one hydraulic valve. Several hydraulic valves or a combination valve can also be provided. By coupling the hydraulic connections with the hydraulic system of the towing vehicle or the pumpkin harvester, the collection plate can in principle be very easily preset to its desired height or, for maintenance purposes, the collection plate can be completely lifted above the second one

Hydraulic cylinders possible.

It is a further preferred feature that a pressure relief valve is arranged on the hydraulic connections between the first and second hydraulic cylinders, which allows hydraulic fluid to flow into an expansion tank or into a hydraulic system of the towing vehicle or the pumpkin harvester if the pressure is too high. In order to protect the system from overloads, which can occur, for example, due to contact with the ground, stones or incorrect operation

It is advantageous to provide a pressure relief valve via which

The towing vehicle or the pumpkin harvester can flow away.

It is a further preferred feature that a further pressure relief valve, also called a double shock valve, is arranged on the hydraulic connections between the first and second hydraulic cylinders, which allows hydraulic fluid to flow from the annular chambers into the piston chambers and vice versa if the pressure is too high. In addition to or as an alternative to a pressure relief valve in the direction of the hydraulic system of the towing vehicle or the pumpkin harvester, a double shock valve can also be provided, which equalizes pressure between the hydraulic connections connected to the annular chambers and those connected to the piston chambers

connected hydraulic connections allowed.

Finally, it is a further preferred feature that the first and second hydraulic cylinders are of the same dimensions. This means that the device can be constructed very simply and cost-effectively and, due to the closed circuit between the first and second hydraulic cylinders, it is ensured that the recorded movement from the first hydraulic cylinder is transferred to the second hydraulic cylinder in exactly the same way, i.e. that the stroke paths are always exactly the same

are.

The invention will now be described in greater detail using an exemplary embodiment and with the aid of the accompanying figure. This shows

Fig. 1 shows a schematic arrangement of an inventive

Height adjustment device.

In Fig. 1, only the spiked roller pickup 2, a section of the frame 3 and the collection plate 1 of the pumpkin harvester are shown schematically. Of the towing vehicle 5, for example a tractor, only the rear axle 12 is

as well as the rear section indicates with which the drawbar 4

function is necessary.

During operation, the pumpkin harvester is moved to the right by the towing vehicle 5 with respect to the figure, whereby the pumpkins 13 pass under the spiked roller pickup 2 and are transported by it into the pumpkin harvester. The collection plate 1 prevents pumpkins 13 from escaping if, for example, they have not been completely impaled. The collection plate 1 presses the pumpkins 13 against the spikes over a certain section of the path so that they rise safely

be transported.

The height adjustment device includes a first hydraulic cylinder 8, which is mounted between the frame 3 of the harvester and the drawbar 4. When the pumpkin harvester moves over uneven ground 6, the drawbar 4 moves up and down and this also causes the piston of the

First hydraulic cylinder 8 pushed in or extended.

The first hydraulic cylinder 8 is connected via hydraulic connections to a second hydraulic cylinder 9, which is mounted between the frame 3 of the pumpkin harvester and the collection plate 1. The hydraulic lines are connected in such a way that the piston chambers and annular chambers of the first 8 and second hydraulic cylinder 9 are each connected to one another. This means that extending the piston on one hydraulic cylinder causes it to retract on the other

Hydraulic cylinder causes and vice versa.

The collecting plate 1 is articulated on the axis of rotation or just barely

attached next to the axis of rotation of the spiked roller receiver 2 and

at the correct height behind the spiked roller receiver 2.

So that the height of the collecting plate 1 can in principle be easily adjusted and, if necessary, also be lifted out hydraulically, a hydraulic valve 10 is provided, via which the hydraulic lines between the first 8 and second hydraulic cylinder 9 are connected to the hydraulic system of the towing vehicle 5. The hydraulic valve 10 is only indicated in the figure by a dashed box. Furthermore, a pressure relief valve 11 is provided to protect the height adjustment device against overload. In the figure, the pressure relief valve 11 is integrated into the hydraulic valve 10 as a combination valve. The hydraulic connection to the towing vehicle 5 necessary for the pressure relief valve 11, which connects both the connections of the annular chambers and those of the piston chambers in the direction of the towing vehicle 5, is therefore marked with the reference number 11 in this exemplary embodiment. In principle, combined hydraulic valves or separate valves and/or pressure relief valves can be used as valves. Furthermore, a double shock valve can be provided, which equalizes pressure between the hydraulic connections of the annular chambers and

Piston chambers allowed.

Claims (6)

1. Device for the adaptive height adjustment of a collection plate (1) on a spiked roller pickup (2) of a pumpkin harvesting machine, the pumpkin harvesting machine having a frame (3) on which the spiked roller pickup (2) is rotatably mounted for collecting the pumpkins (13), and wherein the frame (3) can be connected in an articulated manner to a towing vehicle (5) via a drawbar (4), the angle of inclination of the frame (3) to the ground (6) being located between the frame (3) and the drawbar (4). Linear drive (7), for example in the form of a hydraulic cylinder, is adjustable, and furthermore a rotatably attached to the frame (3) and adjustable in height relative to the ground, essentially having the shape of a cylinder jacket section and arranged essentially concentrically behind the spiked roller receiver (2). Collection plate (1) is provided, characterized in that the height adjustment device has a first hydraulic cylinder (8), which is arranged with its ends between the frame (3) of the pumpkin harvester and the drawbar (4), and a second hydraulic cylinder (9), which is arranged with its ends between the frame (3) and the collecting shield (1) in order to adjust the height of the shield (1) relative to the frame (3), the piston chambers of the first (8) and second hydraulic cylinders (9 ) and the annular chambers of the first (8) and second hydraulic cylinder (9) with each other hydraulically are connected. 2. Device for adaptive height adjustment of a collecting plate (1) on a spiked roller receiver (2) of a pumpkin harvesting machine according to claim 1, characterized in that the hydraulic connections between the first (8) and second hydraulic cylinder (9) via at least one hydraulic valve (10). a hydraulic system from the towing vehicle (5) or from the Pumpkin harvester are connected. 3. Device for the adaptive height adjustment of a collecting plate (1) on a spiked roller receiver (2). Pumpkin harvester according to claim 1 or 2, characterized Pumpkin harvester can drain. 4. Device for the adaptive height adjustment of a collecting plate (1) on a spiked roller receiver (2) of a pumpkin harvesting machine according to one of claims 1 to 3, characterized in that a pressure relief valve (9) is provided on the hydraulic connections between the first (8) and second hydraulic cylinder (9). 11) is arranged, which allows hydraulic fluid to flow between the two when there is negative pressure in one hydraulic circuit and when the pressure in the second hydraulic circuit is too high Ring and piston chambers can flow. 5. Device for adaptive height adjustment of a collecting plate (1) on a spiked roller receiver (2) of a pumpkin harvesting machine according to one of claims 1 to 4, characterized in that the first (8) and second hydraulic cylinders (9) are of the same dimensions. 6. Pumpkin harvester with a frame (3) on which a spiked roller pickup (2) for collecting the pumpkins (13) is rotatably mounted, the frame (3) having a drawbar (4) can be connected in an articulated manner to a towing vehicle (5), and the angle of inclination of the frame (3) to the ground (6) via a linear drive (7) located between the frame (3) and the towing vehicle (5), for example in the form a hydraulic cylinder, is adjustable, and furthermore a collecting plate (1) which is rotatably attached to the frame (3) and can be adjusted in height relative to the ground (6), essentially having the shape of a cylinder jacket section and arranged essentially concentrically behind the spiked roller receiver (2). is, characterized in that a height adjustment device according to one of claims 1 to 5 is provided.