EP0593893B1 - Scraper for a rotating groundcompactor - Google Patents
Scraper for a rotating groundcompactor Download PDFInfo
- Publication number
- EP0593893B1 EP0593893B1 EP93114642A EP93114642A EP0593893B1 EP 0593893 B1 EP0593893 B1 EP 0593893B1 EP 93114642 A EP93114642 A EP 93114642A EP 93114642 A EP93114642 A EP 93114642A EP 0593893 B1 EP0593893 B1 EP 0593893B1
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- EP
- European Patent Office
- Prior art keywords
- scraper
- spoon
- rotary tool
- tool according
- approximately
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 238000005056 compaction Methods 0.000 claims abstract description 4
- 239000002689 soil Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 description 7
- 238000003971 tillage Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/026—Improving by compacting by rolling with rollers usable only for or specially adapted for soil compaction, e.g. sheepsfoot rollers
Definitions
- the present invention relates to a rotating tool for tillage with a cylindrical casing, in the circumferential area of which at least one approximately axially extending stripper acts, the casing optionally being provided on its surface with axially spaced projections for local soil compaction, and the stripper on its the casing surface facing end with respect to a radial section through the rotating tool is profiled approximately like a spoon and runs out almost tangentially against the direction of rotation of the tool on the lateral surface.
- Such a tool is used for tillage in agriculture and can be composed, for example, of loosening coulters that break the soil by lifting it slightly, a tine rotor that grips the upper crumb, throws it against a baffle plate and thus crushes it, and a packer roller that is used for consolidation and Ground closure ensures.
- a packer roller that is used for consolidation and Ground closure ensures.
- This scraper which is designed as a flat plate that extends axially over the smooth cylindrical jacket areas of the packer roller, is generally attached so that the free part is inclined at an acute angle to the direction of rotation of the packer roller and thus with an edge of its end face on it is present. Due to the impinging soil, this edge of the scraper becomes after a short period of operation sanded down so that a surface running parallel to the roller jacket is created. The wear zone in the area of the edge is very small, so that the scraper wears out very quickly. The distance between the scraper and the packer roller also increases and it is no longer possible to completely remove the adhesive soil material.
- This object is achieved in that the direction of curvature of the scraper-shaped scraper is opposite to the curvature of the lateral surface, and that the concave side of the scoop-shaped scraper points downward.
- the advantages achieved by the invention are, on the one hand, that the incoming earth current is opposed to a wear zone which is arranged perpendicular to the earth current, therefore extends over the entire stripper thickness and is therefore larger than before.
- the spoon-like design which can be realized by an arch or angled shape, has the surprising effect that the incoming floor material is offered a receiving space that promotes the formation of an earth stocking. These earth trimmings provide effective wear protection for the scraper underneath.
- Another feature of the invention is that the scraper is pressed against the lateral surface by the reaction force of the incoming earth current and not, as in the known case, away from it.
- the spoon-like shape leads to an inherent increase in pressure, which is not the case with a flat design of the scraper.
- the flat design of the holder and mounting plate ensures uniform power transmission.
- the mounting plate is angled towards the spoon-like end against the spoon curvature. This prevents the soil particles detached from the packer roller from building up on the mounting plate.
- FIG. 1 shows the part of a tool for tillage consisting of a packer roller 1.
- the packer roller 1 is connected to the rest of the tool via fastening elements (not shown in more detail). It is generally pulled by a tractor without its own drive, which results in a clockwise rotation for FIG. 1.
- the packer roller 1 is composed of a circular cylindrical jacket 2, which is provided on its surface with axially spaced projections in the form of several toothed disks 3, which serve for local soil compaction. Between the toothed disks 3, at least one axially extending wiper 4 engages in the peripheral region of the jacket 2.
- This scraper 4 is connected via a scraper holder 5 and a scraper bar 6 to the packer roller bearing or to the rest of the tool in a manner not shown in more detail, the scraper being screwed to the scraper holder and the scraper holder to the scraper bar.
- the scraper 4 which is arranged behind and slightly above the lowest roller point in the direction of travel, rests on a screw-on surface 5a of the scraper holder 5, which is inclined slightly downward in the packer roller direction.
- the attachment between the scraper and the scraper holder is accomplished by screwing the screw-on surface 5a of the scraper holder 5 to a mounting plate 4a of the scraper 4 via elongated holes and screws 7.
- the one-piece scraper 4 has at its end facing the lateral surface a spoon-like partial body 4b which is related to a radial section and which, with a surface 4c (cf.
- the angular position of the surface 4c compared to the jacket 2 can be influenced on the one hand by the orientation of the scraper holder 5 and on the other hand by the shape of the spoon.
- the spoon-like end ends with an end face 4d which runs parallel to the tool axis and approximately perpendicular to the lateral surface and represents the wear zone of the present embodiment.
- FIG. 2 shows an embodiment of the scraper, in which the spoon-like shape has been realized by a harmonious curvature. It is also possible instead to work with a single or multiple angled profile shape.
- FIG. 3 A corresponding exemplary embodiment is shown in FIG. 3, in which the scraper 14 is composed of a mounting plate 14a, a spoon-like metal body 14b, a surface 14c tapering tangentially to the packer roller and an end face 14d. In both cases, the spoon-like wiper profile is open at the bottom.
- the lumps of earth adhering to the jacket of the packer roller are driven against the stripper 4 (or 14), in particular the end face 4d (14d) thereof, and are directed towards the inside of the bucket.
- a movement away from the packer roller is impressed on them in accordance with the direction of the end face and the shape of the spoon, whereby they undergo detachment at the latest at the concave transition region between the spoon-like partial body 4b (14b) and the mounting plate 4a (14a) and fall down.
- the spoon-like area of the scraper fills with a relatively firmly adhering soil during operation.
- the wear zones of the scraper are no longer directly affected applied to the incoming earth current but shielded.
- the wipers according to the invention therefore manage with minimal wear. While in conventional wipers, after tilling 20 to 30 hectares, the wipers usually had to be replaced, no material removal is discernible when using the design according to the invention.
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Soil Working Implements (AREA)
- Road Repair (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft ein rotierendes Werkzeug zur Bodenbearbeitung mit einem zylindrischen Mantel, in dessen Umfangsbereich zumindest ein etwa axial verlaufender Abstreifer angreift, wobei der Mantel gegebenenfalls an seiner Oberfläche mit axial distanzierten Vorsprüngen zur lokalen Bodenverdichtung versehen ist, und wobei der Abstreifer an seinem der Mantelfläche zugewandten Ende bezogen auf einen Radialschnitt durch das rotierende Werkzeug etwa löffelartig profiliert ist und nahezu tangential entgegen der Drehrichtung des Werkzeugs an der Mantelfläche ausläuft.The present invention relates to a rotating tool for tillage with a cylindrical casing, in the circumferential area of which at least one approximately axially extending stripper acts, the casing optionally being provided on its surface with axially spaced projections for local soil compaction, and the stripper on its the casing surface facing end with respect to a radial section through the rotating tool is profiled approximately like a spoon and runs out almost tangentially against the direction of rotation of the tool on the lateral surface.
Ein derartiges Werkzeug dient zur Bodenbearbeitung in der Landwirtschaft und kann sich beispielsweise zusammensetzen aus Lockerungsscharen, die den Boden durch leichtes Anheben brechen, einem Zinkenrotor, der die obere Krume erfaßt, gegen ein Prallblech wirft und somit zerkleinert, und einer Packerwalze, die für Rückverfestigung und Bodenschluß sorgt. Im Zuge dieser Rückverfestigung, die die nicht angetriebene Packerwalze durch ihr Gewicht und ihre Profilierung hervorruft, ist es unvermeidlich, daß verfestigtes Bodenmaterial an dem zylindrischen Mantel der Packerwalze haften bleibt und mit umläuft. Dies hat zur Folge, daß sich nach und nach immer mehr Bodenmaterial aufbaut, was schließlich zu Betriebsstörungen führt und die Qualität der Bodenoberfläche verschlechtert.Such a tool is used for tillage in agriculture and can be composed, for example, of loosening coulters that break the soil by lifting it slightly, a tine rotor that grips the upper crumb, throws it against a baffle plate and thus crushes it, and a packer roller that is used for consolidation and Ground closure ensures. In the course of this reconsolidation, which causes the non-driven packer roller due to its weight and its profile, it is inevitable that solidified soil material adheres to the cylindrical jacket of the packer roller and rotates with it. This has the consequence that gradually more and more soil material builds up, which eventually leads to malfunctions and deteriorates the quality of the floor surface.
Es ist bereits bekannt, daß dies dadurch vermieden werden kann, indem ein Abstreifer an der Packerwalze anliegt und das haftende Bodenmaterial abschält. In der GB-A-2 124 063 ist hierzu ein löffelartig profilierter Abstreifer angegeben, der nahezu tangential entgegen der Drehrichtung des Werkzeuges an der Mantelfläche ausläuft. Jedoch ist dieser Abstreifer unterhalb des Mantels der Walze angeordnet und wird demnach nicht nur vom am Mantel haftenden Erdreich abrasiv beaufschlagt sonder auch von der unter dem Werkzeug vorbeigeführten Erde. Außerdem ist der Abstreifer parallel zum Mantel der Walze gekrümmt, so daß er leicht von dem Mantel abdrängbar ist und seine Abstreiffunktion dann nicht mehr erfüllen kann.It is already known that this can be avoided by a scraper resting on the packer roller and peeling off the adhesive soil material. In GB-A-2 124 063, a spoon-like profiled scraper is specified for this purpose, which runs out almost tangentially against the direction of rotation of the tool on the outer surface. However, this scraper is arranged below the jacket of the roller and is therefore not only abrasively impacted by the soil adhering to the jacket, but also by the earth that is guided under the tool. In addition, the stripper is curved parallel to the jacket of the roller, so that it can be easily pushed off the jacket and can then no longer fulfill its stripping function.
Außerdem ist aus der US-4 348 134 ein Abstreifer bekannt, der entgegen der Drehrichtung einer Packerwalze gerichtet ist. Jedoch liegt dieser Abstreifer nicht am Mantel der Walze an und kann somit die gewünschte Funktion nicht voll erfüllen.In addition, a stripper is known from US Pat. No. 4,348,134 which is directed against the direction of rotation of a packer roller. However, this wiper is not in contact with the roller casing and can therefore not fully fulfill the desired function.
Die Anmelderin hat hier bereits selbst bei einer Packerwalze einen Abstreifer verwandt. Dieser Abstreifer, der als ebene Platte ausgebildet ist, die sich axial über die glattzylindrische Mantelbereiche der Packerwalze erstreckt, wird im allgemeinen so angebracht, daß der freie Teil unter spitzem Winkel gegen die Drehrichtung der Packerwalze geneigt ist und somit mit einer Kante seiner Stirnseite an dieser anliegt. Durch das auftreffende Erdreich wird diese Kante des Abstreifers nach kurzer Betriebszeit abgeschliffen, so daß eine parallel zum Walzenmantel verlaufende Fläche entsteht. Die Verschleißzone im Bereich der Kante ist sehr klein, so daß die Abnutzung des Abstreifers sehr schnell vorangeht. Dabei wird auch der Abstand des Abstreifers von der Packerwalze immer größer und ein vollständiges Entfernen des haftenden Bodenmaterials ist nicht mehr möglich. Je mehr Boden sich nun am Packerwalzenumfang festsetzt, um so größer wird die Kraft, mit der der Abstreifer nach außen von der Packerwalze weggedrückt wird, wodurch sich der Abstand zwischen Packerwalze und Abstreifer nochmals vergrößert und die Abnutzung des Abstreifers weiter ansteigt. Die auf den Abstreifer ausgeübte Kraft kann schließlich so weit anwachsen, daß sogar der Abstreiferbalken, an dem der Abstreifer mit Abstreiferhalter befestigt ist, nach außen gebogen wird.The applicant has already used a scraper here for a packer roller. This scraper, which is designed as a flat plate that extends axially over the smooth cylindrical jacket areas of the packer roller, is generally attached so that the free part is inclined at an acute angle to the direction of rotation of the packer roller and thus with an edge of its end face on it is present. Due to the impinging soil, this edge of the scraper becomes after a short period of operation sanded down so that a surface running parallel to the roller jacket is created. The wear zone in the area of the edge is very small, so that the scraper wears out very quickly. The distance between the scraper and the packer roller also increases and it is no longer possible to completely remove the adhesive soil material. The more soil is now attached to the circumference of the packer roller, the greater the force with which the scraper is pushed outwards from the packer roller, which increases the distance between the packer roller and the scraper and increases the wear on the scraper. The force exerted on the scraper can finally grow so far that even the scraper bar to which the scraper is attached with the scraper holder is bent outwards.
Nach Versuchen mit verschiedenen Winkelstellungen und Materialien des Abstreifers, die keine wesentliche Verbesserung ergaben, stellt sich nun die Aufgabe, für ein rotierendes Werkzeug zur Bodenbearbeitung einen Abstreifer zu entwickeln, bei dem der Verschleiß erheblich verringert und die nachteilige Bildung eines Spaltes gegenüber dem Walzenmantel weitgehend vermieden wird.After tests with different angular positions and materials of the scraper, which did not result in any significant improvement, the task now is to develop a scraper for a rotating tool for soil cultivation, in which the wear is considerably reduced and the disadvantageous formation of a gap with respect to the roller jacket is largely avoided becomes.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Krümmungsrichtung des löffelartig profilierten Abstreifers entgegengesetzt zur Krümmung der Mantelfläche ist, und daß die konkave Seite des löffelartig profilierten Abstreifers nach unten zeigt.This object is achieved in that the direction of curvature of the scraper-shaped scraper is opposite to the curvature of the lateral surface, and that the concave side of the scoop-shaped scraper points downward.
Die durch die Erfindung erreichten Vorteile liegen einerseits darin, daß dem ankommenden Erdstrom eine Verschleißzone entgegengestellt wird, die senkrecht zum Erdstrom angeordnet ist, sich daher über die gesamte Abstreiferdicke erstreckt und somit größer ausgebildet ist als bisher. Zum anderen hat die löffelähnliche Gestaltung, die durch Bogen- oder Winkelform realisiert werden kann, den überraschenden Effekt, daß dem ankommenden Bodenmaterial ein Aufnahmeraum angeboten wird, der die Bildung eines Erdbesatzes fördert. Durch diesen Erdbesatz kommt es zu einem wirkungsvollen Verschleißschutz für den darunter liegenden Abstreifer.The advantages achieved by the invention are, on the one hand, that the incoming earth current is opposed to a wear zone which is arranged perpendicular to the earth current, therefore extends over the entire stripper thickness and is therefore larger than before. On the other hand, the spoon-like design, which can be realized by an arch or angled shape, has the surprising effect that the incoming floor material is offered a receiving space that promotes the formation of an earth stocking. These earth trimmings provide effective wear protection for the scraper underneath.
Ein weiteres Merkmal der Erfindung ist es, daß der Abstreifer durch die Reaktionskraft des ankommenden Erdstromes gegen die Mantelfläche und nicht wie im bekannten Fall von ihr weg gedrückt wird. Außerdem führ die löffelähnliche Form zu einer Eigenverstärkung des Druckes, die bei einer ebenen Ausführung des Abstreifers nicht gegeben ist.Another feature of the invention is that the scraper is pressed against the lateral surface by the reaction force of the incoming earth current and not, as in the known case, away from it. In addition, the spoon-like shape leads to an inherent increase in pressure, which is not the case with a flat design of the scraper.
Zweckmäßig schließt sich an das löffelartige Ende einstückig eine flache Montageplatte an, mit der der Abstreifer an einem Halter montiert ist. Hierdurch ergibt sich zum einen eine einfache Paßform, wodurch der Abstreifer problemlos befestigt werden kann, zum anderen ist hierdurch gewährleistet, daß alle bereits existierenden, baugleichen Werkzeuge mit dem löffelartigen Abstreifer nachgerüstet werden können. Des weiteren ist durch die ebene Ausführung von Halter und Montageplatte eine gleichmäßige Kraftübertragung gegeben.A flat mounting plate, with which the scraper is mounted on a holder, expediently adjoins the spoon-like end. On the one hand, this results in a simple fit, as a result of which the scraper can be easily attached, on the other hand, this ensures that all existing, identical tools can be retrofitted with the spoon-like scraper. Furthermore, the flat design of the holder and mounting plate ensures uniform power transmission.
In einer bevorzugten Ausführung der Erfindung ist die Montageplatte gegenüber dem löffelartigen Ende entgegen der Löffelkrümmung abgewinkelt. Hierdurch wird vermieden, daß sich die von der Packerwalze abgelösten Bodenteilchen an der Montageplatte aufbauen.In a preferred embodiment of the invention, the mounting plate is angled towards the spoon-like end against the spoon curvature. This prevents the soil particles detached from the packer roller from building up on the mounting plate.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen anhand der Zeichnungen; dabei zeigt
- Figur 1
- einen Schnitt senkrecht zur Rotationsachse durch eine Packerwalze mit Abstreifer und Abstreiferhalter;
Figur 2- eine Seitenansicht des Abstreifers
- Figur 3
- eine Seitenansicht einer alternativen Abstreifer-Bauform.
- Figure 1
- a section perpendicular to the axis of rotation through a packer roller with wiper and wiper holder;
- Figure 2
- a side view of the scraper
- Figure 3
- a side view of an alternative wiper design.
In Figur 1 erkennt man den aus einer Packerwalze 1 bestehenden Teil eines Werkzeuges zur Bodenbearbeitung. Die Packerwalze 1 ist über nicht genauer dargestellte Befestigungselemente mit dem restlichen Werkzeug verbunden. Sie wird im allgemeinen ohne eigenen Antrieb von einem Traktor gezogen, hierdurch ergibt sich für Figur 1 eine Drehbewegung im Uhrzeigersinn.FIG. 1 shows the part of a tool for tillage consisting of a packer roller 1. The packer roller 1 is connected to the rest of the tool via fastening elements (not shown in more detail). It is generally pulled by a tractor without its own drive, which results in a clockwise rotation for FIG. 1.
Die Packerwalze 1 setzt sich zusammen aus einem kreiszylindrischen Mantel 2, der an seiner Oberfläche mit axial distanzierten Vorsprüngen in Form mehrerer Zahnscheiben 3 versehen ist, welche zur lokalen Bodenverdichtung dienen. Jeweils zwischen den Zahnscheiben 3 greift im Umfangsbereich des Mantels 2 zumindest jeweils ein axial verlaufender Abstreifer 4 an. Dieser Abstreifer 4 ist über einen Abstreiferhalter 5 und einen Abstreiferbalken 6 auf nicht genauer dargestellte Art mit der Packerwalzen-Lagerung bzw. mit dem Rest des Werkzeuges verbunden, wobei der Abstreifer mit dem Abstreiferhalter und der Abstreiferhalter mit dem Abstreiferbalken jeweils verschraubt sind.The packer roller 1 is composed of a circular
Der Abstreifer 4, der in Fahrtrichtung hinter und etwas über dem tiefsten Walzenpunkt angeordnet ist, liegt auf einer Anschraubfläche 5a des Abstreiferhalters 5 auf, die in Packerwalzenrichtung leicht nach unten geneigt ist.The scraper 4, which is arranged behind and slightly above the lowest roller point in the direction of travel, rests on a screw-on surface 5a of the scraper holder 5, which is inclined slightly downward in the packer roller direction.
Die Befestigung zwischen Abstreifer und Abstreiferhalter erfolgt dadurch, daß die Anschraubfläche 5a des Abstreiferhalters 5 über Langlöcher und Schrauben 7 mit einer Montageplatte 4a des Abstreifers 4 verschraubt wird. Neben der Montageplatte 4a weist der einstückige Abstreifer 4 an seinem der Mantelfläche zugewandten Ende einen auf einen Radialschnitt bezogenen löffelartigen Teilkörper 4b auf, der mit einer Fläche 4c (vgl. Figur 2) nahezu tangential am Mantel 2 der Packerwalze mit minimalem Abstand hierzu ausläuft. Die Winkelstellung der Fläche 4c im Vergleich zum Mantel 2 kann zum einen durch die Orientierung des Abstreiferhalters 5 und zum anderen durch die Löffelform beeinflußt werden. Das löffelartige Ende schließt mit einer Stirnseite 4d ab, die parallel zur Werkzeugachse und etwa senkrecht zur Mantelfläche verläuft und die Verschleißzone der vorliegenden Ausführung darstellt.The attachment between the scraper and the scraper holder is accomplished by screwing the screw-on surface 5a of the scraper holder 5 to a
Figur 2 zeigt eine Ausbildung des Abstreifers, bei der die löffelartige Form durch eine harmonische Krümmung realisiert worden ist. Ebenso ist es stattdessen möglich, mit einer ein- oder mehrfach abgewinkelten Profilform zu arbeiten. Ein entsprechendes Ausführungsbeispiel ist in Figur 3 dargestellt, in dem sich der Abstreifer 14 aus einer Montageplatte 14a, einem löffelartigen Metallkörper 14b, einer tangential zur Packerwalze auslaufenden Fläche 14c und einer Stirnseite 14d zusammensetzt. In beiden Fällen ist das löffelähnliche Abstreiferprofil nach unten offen.Figure 2 shows an embodiment of the scraper, in which the spoon-like shape has been realized by a harmonious curvature. It is also possible instead to work with a single or multiple angled profile shape. A corresponding exemplary embodiment is shown in FIG. 3, in which the
Während des Betriebes der Packerwalze werden die am Mantel der Packerwalze haftenden Erdklumpen gegen den Abstreifer 4 (bzw. 14), insbesondere deren Stirnfläche 4d (14d) getrieben und zur Löffelinnenseite hingelenkt. Hier wird ihnen entsprechend der Stirnflächenrichtung und der Löffelform eine Bewegung von der Packerwalze weg aufgeprägt, wobei sie spätestens an dem konkaven Übergangsbereich zwischen löffelartigem Teilkörper 4b (14b) und Montageplatte 4a (14a) eine Ablösung erfahren und nach unten fallen.During the operation of the packer roller, the lumps of earth adhering to the jacket of the packer roller are driven against the stripper 4 (or 14), in particular the
Überraschenderweise füllt sich der löffelartige Bereich des Abstreifers während des Betriebes mit einem relativ fest anhaftenden Erdbesatz. Dadurch werden die Verschleißzonen des Abstreifers nicht mehr unmittelbar von dem ankommenden Erdstrom beaufschlagt sondern abgeschirmt. Die erfindungsgemäßen Abstreifer kommen daher mit minimalem Verschleiß aus. Während bei herkömmlichen Abstreifern nach einer Bodenbearbeitung von 20 bis 30 Hektar meist der Abstreifer ersetzt werden mußte, ist bei Anwendung der erfindungsgemäßen Bauform noch kein Materialabtrag erkennbar.Surprisingly, the spoon-like area of the scraper fills with a relatively firmly adhering soil during operation. As a result, the wear zones of the scraper are no longer directly affected applied to the incoming earth current but shielded. The wipers according to the invention therefore manage with minimal wear. While in conventional wipers, after tilling 20 to 30 hectares, the wipers usually had to be replaced, no material removal is discernible when using the design according to the invention.
Claims (7)
- Rotary tool for cultivation, having a cylindrical casing (2) in whose circumferential region at least one axially extending scraper (4, 14) is active and which is provided, especially at its surface, with axially spaced projections (3) for local compaction of the soil, the scraper (4, 14) having an approximately spoon-like profile, referred to a radial section through the rotary tool, at the end of the scraper (4b, 14b) facing the casing surface, the scraper extending out virtually tangentially against the direction of rotation of the tool at the casing surface (2),
characterised in that
the direction of curvature of the spoon-like profiled scraper is opposite to the curvature of the casing surface, and in that the concave side of the spoon-like profiled scraper points downwards. - Rotary tool according to Claim 1, characterised in that the spoon-like end (4b, 14b) terminates in an end-face (4d, 14d) which runs parallel to the tool axis and approximately perpendicular to the casing surface (2).
- Rotary tool according to Claim 1, characterised in that the scraper (4, 14) is pressed against the casing surface (2) by the reactive force of the incoming stream of earth.
- Rotary tool according to Claim 1, characterised in that a flat mounting plate (4a, 14a) adjoins the spoon-like end (4b, 14b) as one piece, the scraper (4, 14) being mounted to a support (5) by said mounting plate (4a, 14a).
- Rotary tool according to Claim 1, characterised in that the mounting plate (4a. 14a) facing the spoon-like end (4b, 14b) is angularly bent against the curvature of the spoon.
- Rotary tool according to Claim 1, characterised in that the approximately spoon-like profiling is realised by means of a single or multiple angular bend.
- Rotary tool according to Claim 6, characterised in that for a single angular bend the end of the scraper extending out at the casing makes an angle of approximately 90° to approximately 160° with the adjoining scraper region.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9214279U | 1992-10-22 | ||
| DE9214279U DE9214279U1 (en) | 1992-10-22 | 1992-10-22 | Scraper for rotating tillage tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0593893A1 EP0593893A1 (en) | 1994-04-27 |
| EP0593893B1 true EP0593893B1 (en) | 1996-11-27 |
Family
ID=6885107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93114642A Expired - Lifetime EP0593893B1 (en) | 1992-10-22 | 1993-09-11 | Scraper for a rotating groundcompactor |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0593893B1 (en) |
| AT (1) | ATE145684T1 (en) |
| DE (2) | DE9214279U1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1520935B1 (en) | 2003-10-02 | 2011-01-26 | BOMAG GmbH | Cleaning scraper for a soil compaction roller and soil compaction roller |
| DE102004043038A1 (en) * | 2003-10-02 | 2005-06-02 | Bomag Gmbh | Scraper for a soil compaction roller and soil compaction roller with such a scraper device |
| DE202007008930U1 (en) * | 2007-06-26 | 2007-09-20 | Bomag Gmbh | Scraper for a soil compaction roller and soil compaction roller with such a stripping device |
| CN106908296B (en) * | 2017-04-10 | 2023-06-02 | 东北农业大学 | Full-automatic soil saturator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2124063A (en) * | 1982-07-30 | 1984-02-15 | Lely Nv C Van Der | Soil cultivating implements |
| EP0294903A1 (en) * | 1987-06-10 | 1988-12-14 | C. van der Lely N.V. | A soil cultivating machine comprising a roller |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3071051A (en) * | 1960-04-11 | 1963-01-01 | William E Martin | Patch roller apparatus |
| US3554101A (en) * | 1968-09-19 | 1971-01-12 | Caterpillar Tractor Co | Support bearing for compactor cleaner bar frame |
| US4348134A (en) * | 1980-01-24 | 1982-09-07 | Ingersoll-Rand Company | Scraper assembly for a padfoot compactor, and method of forming same |
| DE8031009U1 (en) * | 1980-11-20 | 1981-06-11 | Maschinenfabrik Rau Gmbh, 7315 Weilheim | KRUEMELWALZE |
| DE3219373C2 (en) * | 1982-05-19 | 1986-12-04 | Howard Machinery Public Ltd. Co., Harleston, Norfolk | Scraper especially for crumb packers |
| NL191352C (en) * | 1982-07-30 | 1995-06-16 | Lely Nv C Van Der | Soil cultivation machine. |
| NL192557C (en) * | 1983-07-07 | 1997-10-03 | Lely Nv C Van Der | Soil cultivation machine, in particular for the preparation of a seedbed. |
| DE3340686C1 (en) * | 1983-11-10 | 1985-01-24 | Amazonen-Werke H. Dreyer Gmbh & Co Kg, 4507 Hasbergen | Soil roller |
| DE3626271A1 (en) * | 1986-08-04 | 1988-03-10 | Thrige Agro As | Agricultural ground roller with strippers |
| DE8708361U1 (en) * | 1987-06-13 | 1988-10-13 | Amazonen-Werke H. Dreyer Gmbh & Co Kg, 4507 Hasbergen | Soil roller |
| NL8801489A (en) * | 1988-06-10 | 1990-01-02 | Lely Nv C Van Der | SOIL TILLER. |
-
1992
- 1992-10-22 DE DE9214279U patent/DE9214279U1/en not_active Expired - Lifetime
-
1993
- 1993-09-11 DE DE59304600T patent/DE59304600D1/en not_active Expired - Fee Related
- 1993-09-11 AT AT93114642T patent/ATE145684T1/en not_active IP Right Cessation
- 1993-09-11 EP EP93114642A patent/EP0593893B1/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2124063A (en) * | 1982-07-30 | 1984-02-15 | Lely Nv C Van Der | Soil cultivating implements |
| EP0294903A1 (en) * | 1987-06-10 | 1988-12-14 | C. van der Lely N.V. | A soil cultivating machine comprising a roller |
Also Published As
| Publication number | Publication date |
|---|---|
| DE59304600D1 (en) | 1997-01-09 |
| DE9214279U1 (en) | 1992-12-10 |
| ATE145684T1 (en) | 1996-12-15 |
| EP0593893A1 (en) | 1994-04-27 |
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