EP2554747B1 - Milling rotor for processing soil material and soil cultivation machine with such a rotor - Google Patents

Milling rotor for processing soil material and soil cultivation machine with such a rotor Download PDF

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Publication number
EP2554747B1
EP2554747B1 EP12005529.8A EP12005529A EP2554747B1 EP 2554747 B1 EP2554747 B1 EP 2554747B1 EP 12005529 A EP12005529 A EP 12005529A EP 2554747 B1 EP2554747 B1 EP 2554747B1
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EP
European Patent Office
Prior art keywords
milling
rotor
lines
milling tools
tools
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EP12005529.8A
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German (de)
French (fr)
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EP2554747A2 (en
EP2554747A3 (en
Inventor
Helmut Rötsch
Hans Forster
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Bomag GmbH and Co OHG
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Bomag GmbH and Co OHG
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Publication of EP2554747A3 publication Critical patent/EP2554747A3/en
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/08—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades
    • E01C23/085—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades using power-driven tools, e.g. vibratory tools
    • E01C23/088—Rotary tools, e.g. milling drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/18—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools
    • B28D1/186—Tools therefor, e.g. having exchangeable cutter bits
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/12—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor
    • E01C23/122—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor with power-driven tools, e.g. oscillated hammer apparatus
    • E01C23/127—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for taking-up, tearing-up, or full-depth breaking-up paving, e.g. sett extractor with power-driven tools, e.g. oscillated hammer apparatus rotary, e.g. rotary hammers
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C27/00—Machines which completely free the mineral from the seam
    • E21C27/20—Mineral freed by means not involving slitting
    • E21C27/24—Mineral freed by means not involving slitting by milling means acting on the full working face, i.e. the rotary axis of the tool carrier being substantially parallel to the working face

Definitions

  • the invention relates to a milling rotor for working soil material with a plurality of milling tools, which are arranged distributed over the lateral surface at predetermined intervals and according to a predetermined pattern, wherein the milling tools are arranged in the circumferential direction of the milling rotor along parallel imaginary lines extending from each composed of at least one equal length section of a left-handed and a right-handed helix.
  • tillage machines In the production of traffic routes tillage machines are used in the form of road milling machines, stabilizers and recyclers, which have a milling rotor.
  • the milling rotor consists of a cylinder tube, on the lateral surface of the milling tools are arranged.
  • cutting tools are chisel or chisel-like devices that are either welded directly to the rotor or held in exchangeable holders.
  • the tillage machines of this type are used in particular during the reconstruction of roads and paths to tear open the surfaces concerned over a large area and continuously and then reuse the milled material to produce a new base course.
  • the milled material within the rotor box is continuously either stabilizer and so-called secondary raw materials and other building materials, such as sand, etc. admixed. They are mixed by the rotation of the milling drum in the rotor box with the dissolved milled material. The mixture remains in place as a relatively flat layer for further processing.
  • the dissolved milled material and the mixture of dissolved milled material and additives will be referred to simply as milled material.
  • milling rotors In known milling rotors, the milling tools are distributed on the rotor shell in such a way that seen in the circumferential direction, a symmetrical to the center line pattern with V-shaped or W-shaped course is formed. It turns out, however, that depending on the depth of cut, rotor speed and ground speed of the tillage machine, the milled material is conveyed to the rotor center or on both sides to the outside and stored inhomogeneous. In particular coarse fractions form an undesirable accumulation in the middle of the milling path. Examples of milling rotors of the prior art are, for example, from the documents FR 2 459 329 A1 and EP 1 060 856 A1 known.
  • the invention is therefore based on the object to provide a milling rotor of the type mentioned above and a tillage machine with such a rotor, with which the distribution of the material to be milled is improved.
  • the milling tools are arranged in spaced-apart, in a direction obliquely to the rotor axis lines extending over the entire rotor width, the milling tools of each row are arranged with a predetermined lateral offset with respect to an adjacent row.
  • the invention has the advantage that, due to the arrangement of the milling tools, there is no blade effect and thus no undesired displacement and accumulation of the material to be milled by the milling tools.
  • the arrangement of the milling tools according to the invention does not form a pattern which causes a division within the lateral surface along the circumference, in particular no division takes place towards the rotor center. Rather, the milling material remains approximately on the milling line once the rotor has rotated, forming a flat surface with homogeneous distribution.
  • a circular cylindrical milling rotor 10 of a tillage machine (not shown) on a lateral surface 11 on which a plurality of milling tools 12 are mounted.
  • the rotor axis is provided with the reference numeral 8.
  • a component is referred to, which consists of a chisel holder 13 with a chisel holder 14 and a Schollenbrecher 15 and a chisel 16, which is shown only in a single milling tool 12a.
  • the milling tools 12 are arranged in rows 9, which are dot-dashed along illustrated parallel lines 17, 18 extend, and extending over the entire width of the milling rotor 10.
  • the rows 9 have the same angular distance ⁇ from one another and the milling tools 12 have the same lateral spacing from one another within one row.
  • the lines 17, 18 are spatially sections of helices with a first, relatively large pitch.
  • the direction of rotation of the milling rotor 10 is illustrated by arrow 19.
  • the milling tools 12 are further arranged in the circumferential direction along imaginary further lines 20, which in the settlement of the lateral surface 11 according to Fig. 2 as a zigzag line with four equally long alternating sections A, B and A ', B' and four changes of direction C represents. To keep the presentation clear, only one of these lines 20 is shown. The number n of the direction changes C along the further lines 20 is thus even. Spatially, these are the four alternating sections of left and right second or third helical lines with a second pitch. The second slope is the same for the second and third helix. It is also much smaller compared to the first helix.
  • the arrangement of the milling tools 12 is repeated after half a shell length, ie it is the same on each half of the milling rotor 10.
  • Fig. 3 the first section A of a right-hand helix and the first section B of a left-hand helix are shown, as can be seen when looking at one side of the milling rotor 10.
  • Each section A, B and A ', B' has the same number of milling tools 12.
  • Along the line 20 are in the sections A, B and A ', B' by way of example three milling tools 12th
  • Fig. 4 Guides in the form of a rectangular grid shown. Furthermore, the left-hand helixes of the sections B and B 'are additionally marked with an asterisk (*) for visual clarification of the arrangement in the drawing. Otherwise, this corresponds Fig. 4 the representation of Fig. 2 ,
  • the grid of the auxiliary lines can be seen that arranged in a row 9 milling tools 12 are arranged line by line with a first lateral offset a to the milling tools of an adjacent line 9.
  • the imaginary further lines 20 in the circumferential direction of milling tools 12 are arranged on a gap, ie at least partially laterally overlapping at least one other milling tool 12 is arranged in the circumferential direction between two adjacent milling tools 12 or in one of two adjacent milling tools 12 formed gap.
  • the milling tools 12 are arranged along the lines 20 within each section A, B and A ', B' with the predetermined second lateral offset b.
  • the milling tools 12 in sections of the line 20 with opposite helical lines, ie sections A, A 'on the one hand and sections B, B ', on the other hand, are also arranged in sections around the second lateral offset b such that the milling tools 12 of the counter-rotating sections A, B and A', B 'are partially circumferentially about the second lateral offset b overlap seen.
  • the second lateral offset b is smaller than the first lateral offset a.
  • the first offset a corresponds approximately to the width of three milling tools 12 and the second offset b approximately to half the width of a milling tool 12.
  • These channels 21 are free of cutting tools 12 and extend along the entire circumference of the milling rotor 10. Their course corresponds to the course of the lines 20. From the milling tools 12 solved material and possibly mixed material therefore passes on both sides of the milling tools 12 on the lines 20th in the subsequent channels 21. The material thus experiences only a lateral deflection, which is not greater than the channel width or the first lateral offset a. In the described manner, the material processed by the milling tools 12 on two adjacent lines 20 enters the channels 21.
  • milling tools 12 with two different angular positions with respect to the rotor axis 8 available.
  • a part of the milling tools is arranged with a left-angled angular orientation with an angle ⁇ on the one rotor edge and an equal part is arranged with a rightward angular orientation with an angle ⁇ 'on the other rotor edge.
  • the angles ⁇ and ⁇ ' are the same size and mirrored on a circumferential line. They are in the range of about 2 ° to 3 °.
  • the milling tools 12 with the one angular position lie on the sections A, A 'of the lines 20, which corresponds to a helix.
  • the milling tools 12 with the other angular position are on the sections B, B ', the milling tools 12 on the sections with the left-hand helix all have the same angular position and the milling tools 12 with the mirrored angular position are all on the sections with the right-hand helix. Furthermore, all milling tools on a row 9 each have the same angular position.
  • the milling tools 12 are divided into equal groups. Each group comprises the milling tools 12, which are arranged within one of the sections A, B, A ', and B'. It is thus determined by a number m of the associated lines 9. All milling tools 12 within a group also each have the same angular position of the milling tools 12. The number of such Groups is even. In the illustrated example, a total of four groups are present, with alternating groups with milling tools 12 with opposite angular positions along the lateral surface 11 in the direction of rotation.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Milling Processes (AREA)
  • Road Repair (AREA)
  • Adjustment And Processing Of Grains (AREA)
  • Soil Working Implements (AREA)

Description

Die Erfindung betrifft einen Fräsrotor zur Bearbeitung von Bodenmaterial mit einer Vielzahl von Fräswerkzeugen, die über die Mantelfläche mit vorgegebenen Abständen und nach einem vorgegebenen Muster verteilt angeordnet sind, wobei die Fräswerkzeuge in Umfangsrichtung des Fräsrotors entlang von parallel verlaufenden gedachten Linien angeordnet sind, die sich aus jeweils mindestens einem gleich langen Abschnitt einer linksgängigen und einer rechtsgängigen Schraubenlinie zusammensetzt.The invention relates to a milling rotor for working soil material with a plurality of milling tools, which are arranged distributed over the lateral surface at predetermined intervals and according to a predetermined pattern, wherein the milling tools are arranged in the circumferential direction of the milling rotor along parallel imaginary lines extending from each composed of at least one equal length section of a left-handed and a right-handed helix.

Bei der Herstellung von Verkehrswegen werden Bodenbearbeitungsmaschinen in Form von Straßenfräsen, Stabilisierern und Recyclern eingesetzt, welche einen Fräsrotor aufweisen. Der Fräsrotor besteht aus einem Zylinderrohr, auf dessen Mantelfläche die Fräswerkzeuge angeordnet sind. Als Fräswerkzeuge dienen Meißel oder meißelartige Vorrichtungen, die entweder unmittelbar am Rotor angeschweißt oder in Wechselhaltern gehalten sind.In the production of traffic routes tillage machines are used in the form of road milling machines, stabilizers and recyclers, which have a milling rotor. The milling rotor consists of a cylinder tube, on the lateral surface of the milling tools are arranged. As cutting tools are chisel or chisel-like devices that are either welded directly to the rotor or held in exchangeable holders.

Die Bodenbearbeitungsmaschinen dieser Art dienen insbesondere beim Wiederaufbau von Straßen und Wegen dazu, die betreffenden Flächen großflächig und kontinuierlich aufzureißen und das Fräsgut anschließend zur Herstellung einer neuen Tragschicht wieder zu verwenden. Im Falle von Stabilisierern und Recyclern werden dem Fräsgut innerhalb des Rotorkastens kontinuierlich wahlweise Stabilisierer und sogenannte Sekundärrohstoffe sowie weitere Baustoffe, wie Sand, u.ä. zugemischt. Sie werden durch die Rotation der Frästrommel im Rotorkasten mit dem gelösten Fräsgut vermischt. Die Mischung verbleibt als relativ ebene Schicht an Ort und Stelle zur weiteren Bearbeitung. Nachfolgend wird das gelöste Fräsgut und die Mischung aus gelöstem Fräsgut und Zusatzstoffen vereinfachend als Fräsgut bezeichnet.The tillage machines of this type are used in particular during the reconstruction of roads and paths to tear open the surfaces concerned over a large area and continuously and then reuse the milled material to produce a new base course. In the case of stabilizers and recyclers, the milled material within the rotor box is continuously either stabilizer and so-called secondary raw materials and other building materials, such as sand, etc. admixed. They are mixed by the rotation of the milling drum in the rotor box with the dissolved milled material. The mixture remains in place as a relatively flat layer for further processing. In the following, the dissolved milled material and the mixture of dissolved milled material and additives will be referred to simply as milled material.

Bei bekannten Fräsrotoren sind die Fräswerkzeuge auf dem Rotormantel in der Weise verteilt, dass in Umfangsrichtung gesehen ein zur Mittenlinie symmetrisches Muster mit V-förmigem oder W-förmigem Verlauf entsteht. Es zeigt sich aber, dass je nach Frästiefe, Rotordrehzahl und Fahrgeschwindigkeit der Bodenbearbeitungsmaschine das Fräsgut zur Rotormitte oder beidseitig nach außen gefördert und inhomogen abgelegt wird. Insbesondere Grobanteile bilden dabei eine unerwünschte Anhäufung in der Mitte der Fräsbahn. Beispiele für Fräsrotoren des Standes der Technik sind beispielsweise aus den Druckschriften FR 2 459 329 A1 und EP 1 060 856 A1 bekannt.In known milling rotors, the milling tools are distributed on the rotor shell in such a way that seen in the circumferential direction, a symmetrical to the center line pattern with V-shaped or W-shaped course is formed. It turns out, however, that depending on the depth of cut, rotor speed and ground speed of the tillage machine, the milled material is conveyed to the rotor center or on both sides to the outside and stored inhomogeneous. In particular coarse fractions form an undesirable accumulation in the middle of the milling path. Examples of milling rotors of the prior art are, for example, from the documents FR 2 459 329 A1 and EP 1 060 856 A1 known.

Der Erfindung liegt daher die Aufgabe zu Grunde, einen Fräsrotor der eingangs genannten Art sowie eine Bodenbearbeitungsmaschine mit einem derartigen Rotor anzugeben, mit welchem die Verteilung des Fräsgutes verbessert wird.The invention is therefore based on the object to provide a milling rotor of the type mentioned above and a tillage machine with such a rotor, with which the distribution of the material to be milled is improved.

Diese Aufgabe wird dadurch gelöst, dass die Fräswerkzeuge in voneinander beabstandeten, in einer Richtung schräg zur Rotorachse verlaufenden Zeilen angeordnet sind, die sich über die gesamte Rotorbreite erstrecken, wobei die Fräswerkzeuge einer jeden Zeile mit einem vorgegebenen seitlichen Versatz bezüglich einer benachbarten Zeile angeordnet sind. Bevorzugte Weiterbildungen sind in den abhängigen Ansprüchen beschrieben.This object is achieved in that the milling tools are arranged in spaced-apart, in a direction obliquely to the rotor axis lines extending over the entire rotor width, the milling tools of each row are arranged with a predetermined lateral offset with respect to an adjacent row. Preferred developments are described in the dependent claims.

Die Erfindung hat den Vorteil, dass durch die Anordnung der Fräswerkzeuge keine Schaufelwirkung und somit keine unerwünschte Verlagerung und Anhäufung des Fräsgutes durch die Fräswerkzeuge erfolgt. Die erfindungsgemäße Anordnung der Fräswerkzeuge bildet kein Muster, welches eine Teilung innerhalb der Mantelfläche entlang des Umfangs bewirkt, insbesondere erfolgt keine Teilung zur Rotormitte hin. Das Fräsmaterial verbleibt vielmehr in etwa auf der Fräslinie, wenn der Rotor sich einmal gedreht hat und bildet eine ebene Fläche mit homogener Verteilung.The invention has the advantage that, due to the arrangement of the milling tools, there is no blade effect and thus no undesired displacement and accumulation of the material to be milled by the milling tools. The arrangement of the milling tools according to the invention does not form a pattern which causes a division within the lateral surface along the circumference, in particular no division takes place towards the rotor center. Rather, the milling material remains approximately on the milling line once the rotor has rotated, forming a flat surface with homogeneous distribution.

Nachfolgend wird die Erfindung anhand eines in der Zeichnung dargestellten Ausführungsbeispiels weiter beschrieben. Es zeigen schematisch:

Fig. 1
eine perspektivische Darstellung eines Fräsrotors ;
Fig. 2
eine Draufsicht auf eine Abwicklung des Zylindermantels des Fräsrotors gemäß Fig. 1;
Fig. 3
eine Seitenansicht des Fräsrotors von Fig. 1; und
Fig. 4
eine Draufsicht auf die Abwicklung von Fig. 2 mit Hilfslinien;
The invention will be further described with reference to an embodiment shown in the drawing. They show schematically:
Fig. 1
a perspective view of a milling rotor;
Fig. 2
a plan view of a development of the cylinder jacket of the milling rotor according to Fig. 1 ;
Fig. 3
a side view of the milling rotor of Fig. 1 ; and
Fig. 4
a plan view of the settlement of Fig. 2 with guides;

Gemäß Fig. 1 und 2 weist ein kreiszylindrischer Fräsrotor 10 einer Bodenbearbeitungsmaschine (nicht dargestellt) eine Mantelfläche 11 auf, auf welcher eine Vielzahl von Fräswerkzeugen 12 angebracht sind. Die Rotorachse ist mit dem Bezugszeichen 8 versehen. Als Fräswerkzeug wird hier ein Bauteil bezeichnet, welches aus einem Meißelhalter 13 mit einer Meißelaufnahme 14 und einem Schollenbrecher 15 sowie einem Meißel 16 besteht, der nur bei einem einzigen Fräswerkzeug 12a dargestellt ist. Die Fräswerkzeuge 12 sind in Zeilen 9 angeordnet, die entlang von strichpunktiert dargestellten parallelen Linien 17, 18 verlaufen, und die sich über die gesamte Breite des Fräsrotors 10 erstrecken. Die Zeilen 9 haben zueinander den gleichen Winkelabstand α und die Fräswerkzeuge 12 weisen innerhalb einer Zeile den gleichen seitlichen Abstand voneinander auf. Bei den Linien 17, 18 handelt es sich räumlich gesehen um Abschnitte von Schraubenlinien mit einer ersten, relativ großen Steigung. Die Drehrichtung des Fräsrotors 10 ist mit Pfeil 19 veranschaulicht.According to Fig. 1 and 2 a circular cylindrical milling rotor 10 of a tillage machine (not shown) on a lateral surface 11 on which a plurality of milling tools 12 are mounted. The rotor axis is provided with the reference numeral 8. As a milling tool here a component is referred to, which consists of a chisel holder 13 with a chisel holder 14 and a Schollenbrecher 15 and a chisel 16, which is shown only in a single milling tool 12a. The milling tools 12 are arranged in rows 9, which are dot-dashed along illustrated parallel lines 17, 18 extend, and extending over the entire width of the milling rotor 10. The rows 9 have the same angular distance α from one another and the milling tools 12 have the same lateral spacing from one another within one row. The lines 17, 18 are spatially sections of helices with a first, relatively large pitch. The direction of rotation of the milling rotor 10 is illustrated by arrow 19.

Wie aus Fig. 2 in Verbindung mit Fig. 3 ersichtlich ist, sind die Fräswerkzeuge 12 ferner in Umfangsrichtung entlang von gedachten weiteren Linien 20 angeordnet, die sich in der Abwicklung der Mantelfläche 11 gemäß Fig. 2 als Zickzack-Linie mit vier gleich langen alternierenden Abschnitten A, B und A', B' sowie vier Richtungswechseln C darstellt. Um die Darstellung übersichtlich zu halten, ist nur eine dieser Linien 20 dargestellt. Die Anzahl n der Richtungswechsel C entlang der weiteren Linien 20 ist somit geradzahlig. Räumlich gesehen handelt es sich um die vier alternierenden Abschnitte von links- und rechtsgängigen zweiten bzw. dritten Schraubenlinien mit einer zweiten Steigung. Die zweite Steigung ist für die zweite und dritte Schraubenlinie gleich. Sie ist ferner im Vergleich zur ersten Schraubenlinie sehr viel kleiner. Die Anordnung der Fräswerkzeuge 12 wiederholt sich nach einer halben Mantellänge, d.h. sie ist auf jeder Hälfte des Fräsrotors 10 gleich. In Fig. 3 sind der erste Abschnitt A einer rechtsgängigen Schraubenlinie und der erste Abschnitt B einer linksgängigen Schraubenlinie dargestellt, wie sie beim Blick auf eine Seite des Fräsrotors 10 zu sehen sind. Jeder Abschnitt A, B und A', B' weist die gleiche Anzahl von Fräswerkzeugen 12 auf. Entlang der Linie 20 befinden sich in den Abschnitten A, B und A', B' beispielhaft jeweils drei Fräswerkzeuge 12.How out Fig. 2 combined with Fig. 3 is visible, the milling tools 12 are further arranged in the circumferential direction along imaginary further lines 20, which in the settlement of the lateral surface 11 according to Fig. 2 as a zigzag line with four equally long alternating sections A, B and A ', B' and four changes of direction C represents. To keep the presentation clear, only one of these lines 20 is shown. The number n of the direction changes C along the further lines 20 is thus even. Spatially, these are the four alternating sections of left and right second or third helical lines with a second pitch. The second slope is the same for the second and third helix. It is also much smaller compared to the first helix. The arrangement of the milling tools 12 is repeated after half a shell length, ie it is the same on each half of the milling rotor 10. In Fig. 3 the first section A of a right-hand helix and the first section B of a left-hand helix are shown, as can be seen when looking at one side of the milling rotor 10. Each section A, B and A ', B' has the same number of milling tools 12. Along the line 20 are in the sections A, B and A ', B' by way of example three milling tools 12th

Um die Anordnung der Fräswerkzeuge 12 auf der Mantelfläche 11 leichter nachvollziehbar zu machen, sind in der Darstellung der abgewickelten Mantelfläche 11 gemäß Fig. 4 Hilfslinien in Form eines Rechteckrasters dargestellt. Des Weiteren sind die linksgängigen Schraubenlinien der Abschnitte B und B' zur optischen Verdeutlichung der Anordnung in der Zeichnung zusätzlich mit einem Stern (*) gekennzeichnet. Im Übrigen entspricht Fig. 4 der Darstellung von Fig. 2. Das Raster der Hilfslinien lässt erkennen, dass die in einer Zeile 9 angeordneten Fräswerkzeuge 12 zeilenweise mit einem ersten seitlichen Versatz a zu den Fräswerkzeugen einer benachbarten Zeile 9 angeordnet sind. Ferner sind die auf einer den gedachten weiteren Linien 20 in Umfangsrichtung angeordneten Fräswerkzeuge 12 auf Lücke angeordnet, d.h. in Umfangsrichtung ist zwischen zwei benachbarten Fräswerkzeugen 12 oder in einer von zwei benachbarten Fräswerkzeugen 12 gebildeten Lücke zumindest teilweise seitlich überlappend mindestens ein anderes Fräswerkzeug 12 angeordnet. Im dargestellten Beispiel sind die Fräswerkzeuge 12 entlang der Linien 20 innerhalb eines jeden Abschnitts A, B und A', B' mit dem vorgegebenen zweiten seitlichen Versatz b angeordnet. Die Fräswerkzeuge 12 in Abschnitten der Linie 20 mit gegenläufigen Schraubenlinien, d.h. Abschnitten A, A' einerseits und Abschnitten B, B' andererseits, sind ferner abschnittsweise um den zweiten seitlichen Versatz b in der Weise angeordnet, dass sich die Fräswerkzeuge 12 der Abschnitte mit gegenläufigen Schraubenlinien A, B und A', B' teilweise um den zweiten seitlichen Versatz b in Umfangsrichtung gesehen überlappen. Zu jedem Fräswerkzeug 12 befinden sich somit entlang der Linie 20 zwei weitere Fräswerkzeuge 12, die um den zweiten seitlichen Versatz b teilweise überlappend angeordnet sind. Der zweite seitliche Versatz b ist kleiner als der erste seitliche Versatz a. Im dargestellten Beispiel entspricht der erste Versatz a etwa der Breite dreier Fräswerkzeuge 12 und der zweite Versatz b etwa der halben Breite eines Fräswerkzeugs 12.In order to make the arrangement of the milling tools 12 on the lateral surface 11 easier to understand, are in the representation of the developed lateral surface 11 according to Fig. 4 Guides in the form of a rectangular grid shown. Furthermore, the left-hand helixes of the sections B and B 'are additionally marked with an asterisk (*) for visual clarification of the arrangement in the drawing. Otherwise, this corresponds Fig. 4 the representation of Fig. 2 , The grid of the auxiliary lines can be seen that arranged in a row 9 milling tools 12 are arranged line by line with a first lateral offset a to the milling tools of an adjacent line 9. Furthermore, arranged on a the imaginary further lines 20 in the circumferential direction of milling tools 12 are arranged on a gap, ie at least partially laterally overlapping at least one other milling tool 12 is arranged in the circumferential direction between two adjacent milling tools 12 or in one of two adjacent milling tools 12 formed gap. In the example shown, the milling tools 12 are arranged along the lines 20 within each section A, B and A ', B' with the predetermined second lateral offset b. The milling tools 12 in sections of the line 20 with opposite helical lines, ie sections A, A 'on the one hand and sections B, B ', on the other hand, are also arranged in sections around the second lateral offset b such that the milling tools 12 of the counter-rotating sections A, B and A', B 'are partially circumferentially about the second lateral offset b overlap seen. For each milling tool 12 are thus along the line 20 two further milling tools 12 which are arranged partially overlapping the second lateral offset b. The second lateral offset b is smaller than the first lateral offset a. In the example shown, the first offset a corresponds approximately to the width of three milling tools 12 and the second offset b approximately to half the width of a milling tool 12.

Zwischen den Fräswerkzeugen 12 zweier benachbarter Linien 20 ergibt sich durch den ersten seitlichen Versatz a jeweils ein Kanal 21 zu beiden Seiten der Linien 20, welcher die gleiche Breite wie der erste Versatz a hat. Diese Kanäle 21 sind frei von Fräswerkzeugen 12 und erstrecken sich entlang des gesamten Umfangs des Fräsrotors 10. Ihr Verlauf entspricht dem Verlauf der Linien 20. Von den Fräswerkzeugen 12 gelöstes Material und gegebenenfalls beigemischtes Material gelangt daher zu beiden Seiten der Fräswerkzeuge 12 auf den Linien 20 in die anschließenden Kanäle 21. Das Material erfährt dadurch lediglich eine seitliche Auslenkung, die nicht größer ist als die Kanalbreite bzw. der erste seitliche Versatz a. In die Kanäle 21 gelangt auf die beschriebene Weise das von den Fräswerkzeugen 12 auf zwei benachbarten Linien 20 bearbeitete Material.Between the milling tools 12 of two adjacent lines 20 results from the first lateral offset a in each case a channel 21 on both sides of the lines 20, which has the same width as the first offset a. These channels 21 are free of cutting tools 12 and extend along the entire circumference of the milling rotor 10. Their course corresponds to the course of the lines 20. From the milling tools 12 solved material and possibly mixed material therefore passes on both sides of the milling tools 12 on the lines 20th in the subsequent channels 21. The material thus experiences only a lateral deflection, which is not greater than the channel width or the first lateral offset a. In the described manner, the material processed by the milling tools 12 on two adjacent lines 20 enters the channels 21.

Es sind Fräswerkzeuge 12 mit zwei unterschiedlichen Winkelstellungen bezüglich der Rotorachse 8 vorhanden. Ein Teil der Fräswerkzeuge ist mit einer links gerichteten winkeligen Ausrichtung mit einem Winkel γ auf den einen Rotorrand und ein gleich großer Teil ist mit einer nach rechts gerichteten winkeligen Ausrichtung mit einem Winkel γ' auf den anderen Rotorrand angeordnet. Die Winkel γ und γ' sind gleich groß und an einer Umfangslinie gespiegelt. Sie liegen im Bereich von ca. 2° bis 3°. Die Fräswerkzeuge 12 mit der einen Winkelstellung liegen auf den Abschnitten A, A' der Linien 20, welche der einen Schraubenlinie entspricht. Die Fräswerkzeuge 12 mit der anderen Winkelstellung liegen auf den Abschnitten B, B', die Fräswerkzeuge 12 auf den Abschnitten mit der linksgängigen Schraubenlinie haben alle die gleiche Winkelstellung und die Fräswerkzeuge 12 mit der gespiegelten Winkelstellung liegen alle auf den Abschnitten mit der rechtsgängigen Schraubenlinie. Ferner haben alle Fräswerkzeuge auf einer Zeile 9 jeweils die gleiche Winkelstellung.There are milling tools 12 with two different angular positions with respect to the rotor axis 8 available. A part of the milling tools is arranged with a left-angled angular orientation with an angle γ on the one rotor edge and an equal part is arranged with a rightward angular orientation with an angle γ 'on the other rotor edge. The angles γ and γ 'are the same size and mirrored on a circumferential line. They are in the range of about 2 ° to 3 °. The milling tools 12 with the one angular position lie on the sections A, A 'of the lines 20, which corresponds to a helix. The milling tools 12 with the other angular position are on the sections B, B ', the milling tools 12 on the sections with the left-hand helix all have the same angular position and the milling tools 12 with the mirrored angular position are all on the sections with the right-hand helix. Furthermore, all milling tools on a row 9 each have the same angular position.

Die Fräswerkzeuge 12 sind in gleich große Gruppen unterteilt. Jede Gruppe umfasst die Fräswerkzeuge 12, die innerhalb eines der Abschnitte A, B, A', und B' angeordnet sind. Sie ist somit durch eine Anzahl m der zugehörigen Zeilen 9 bestimmt. Alle Fräswerkzeuge 12 innerhalb einer Gruppe weisen ferner jeweils die gleiche Winkelstellung der Fräswerkzeuge 12 auf. Die Anzahl derartiger Gruppen ist geradzahlig. Im dargestellten Beispiel sind insgesamt vier Gruppen vorhanden, wobei sich Gruppen mit Fräswerkzeugen 12 mit entgegengesetzten Winkelstellungen entlang der Mantelfläche 11 in Drehrichtung abwechseln.The milling tools 12 are divided into equal groups. Each group comprises the milling tools 12, which are arranged within one of the sections A, B, A ', and B'. It is thus determined by a number m of the associated lines 9. All milling tools 12 within a group also each have the same angular position of the milling tools 12. The number of such Groups is even. In the illustrated example, a total of four groups are present, with alternating groups with milling tools 12 with opposite angular positions along the lateral surface 11 in the direction of rotation.

Durch die Winkelstellung der Fräswerkzeuge 12 wird bei jedem Fräswerkzeug 12 insbesondere durch die Meißelhalter 13 und die Schollenbrecher 15 eine entgegen der Drehrichtung des Fräsrotors 10 wirkende Keilfläche erzeugt, da die Fräswerkzeuge 12 durch die Meißelhalter 13 und die Schollenbrecher 15 einen Körper bilden, der mit seiner Längsachse schräg zur Drehrichtung ausgerichtet ist. Die Keilflächen bewirken eine seitliche Auslenkung von gelöstem oder beigemischtem Material, was auch durch die Meißelspitzen unterstützt wird, da auch die Meißel 16 zusammen mit den Meißelhaltern 13 entsprechend winkelig ausgerichtet sind.Due to the angular position of the milling tools 12 a counter to the direction of rotation of the Fräsrotors 10 acting wedge surface is generated at each milling tool 12 in particular by the bit holder 13 and the Schollenbrecher 15 since the milling tools 12 form a body through the bit holder 13 and the Schollenbrecher 15, with his Longitudinal axis is aligned obliquely to the direction of rotation. The wedge surfaces cause a lateral deflection of dissolved or mixed material, which is also supported by the bit tips, since the bit 16 are aligned along with the bit holders 13 correspondingly angular.

Claims (13)

  1. A milling rotor for processing ground material, comprising a plurality of milling tools (12) spread out over the jacket surface at predetermined distances and according to a predetermined pattern, wherein the milling tools (12) are arranged in the circumferential direction of the milling rotor (10) along imaginary, parallel lines (20) that are respectively composed of at least one section (A, B; A', B') of equal length of a left-handed and a right-handed helical line,
    characterized in that
    the milling tools (12) are arranged in lines (9) spaced apart from one another and extending in an oblique direction in relation to the rotor axis (8) over the entire rotor width, the milling tools (12) of each line (9) being arranged with a predetermined lateral offset a with respect to an adjacent line (9).
  2. The milling rotor according to claim 1,
    characterized in that
    the milling tools (12) arranged on the lines (20) are arranged in the gaps.
  3. The milling rotor according to claim 1 or 2,
    characterized in that
    the milling tools (12) of the at least one section (A, A') of the right-handed and left-handed helical lines are arranged, when viewed in the circumferential direction, in a partly overlapping manner in relation to the milling tools (12) of the other section (B, B').
  4. The milling rotor according to any one of the preceding claims,
    characterized in that
    the lines (20) comprise two alternating sections (A, B; A', B') of the left-handed and right-handed helical lines.
  5. The milling rotor according to any one of the preceding claims,
    characterized in that
    adjacent lines (20) partly overlap so that a partial overlapping of at least one milling tool (12) on the one line and at least one milling tool (12) on the other line results in the circumferential direction.
  6. The milling rotor according to any one of the preceding claims,
    characterized in that
    several milling tools (12) are arranged within each section (A, B; A', B') behind one another on the line (20) and that each section (A, B; A', B') has the same number of milling tools (12).
  7. The milling rotor according to any one of the preceding claims,
    characterized in that
    the milling tools (12) are oriented at predetermined angles in relation to the rotor axis (8), wherein a part of the milling tools (12) is angled to the left towards the one rotor edge and another part of the milling tools (12) is angled to the right in a mirrored fashion to the other rotor edge, and wherein the milling tools (12) angled to the right are arranged on the section of the right-handed helical line and the milling tools (12) angled to the left are arranged on the section of the left-handed helical line.
  8. The milling rotor according to any one of the preceding claims,
    characterized in that
    the milling tools (12) of one line (9) have the same angular position, that lines (9) with the first angular position and lines (9) with the second angular position follow one another in the circumferential direction, wherein the number n of the changes in the angular position along the entire jacket surface (11) is an even number (n = 2,4, ....).
  9. The milling rotor according to any one of the preceding claims,
    characterized in that the lines (9) on the rotor jacket (11) extend along a section of a further helical line.
  10. The milling rotor according to any one of the preceding claims,
    characterized in that
    alternating groups of successive lines (9) with milling tools (12) of the same angular position are provided in an alternating manner, while the groups respectively have the same number of lines m.
  11. The milling rotor according to any one of the preceding claims,
    characterized in that
    the lateral offset of milling tools (12) of adjacent lines (9) within the groups is configured as a first offset a, and that a second lateral offset b is provided between the milling tools (12) of adjacent lines (9) of two adjacent groups which is smaller than the first offset a.
  12. A ground milling machine having a milling rotor according to any one of the preceding claims.
  13. The ground milling machine according to claim 12,
    characterized in that
    it is configured as a recycler or stabilizer.
EP12005529.8A 2011-08-04 2012-07-30 Milling rotor for processing soil material and soil cultivation machine with such a rotor Active EP2554747B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011109450A DE102011109450A1 (en) 2011-08-04 2011-08-04 Milling rotor for processing soil material and tillage machine with such a rotor

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EP2554747A2 EP2554747A2 (en) 2013-02-06
EP2554747A3 EP2554747A3 (en) 2016-10-12
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ID=46640520

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EP (1) EP2554747B1 (en)
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DE (1) DE102011109450A1 (en)

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DE102011109450A1 (en) 2013-02-07
US20130033091A1 (en) 2013-02-07
US8820848B2 (en) 2014-09-02
CN102912716A (en) 2013-02-06
EP2554747A2 (en) 2013-02-06
CN102912716B (en) 2017-06-13
EP2554747A3 (en) 2016-10-12

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