EP2801663B1 - Road milling machine, and method for mounting a floating milling drum - Google Patents

Road milling machine, and method for mounting a floating milling drum Download PDF

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Publication number
EP2801663B1
EP2801663B1 EP14166448.2A EP14166448A EP2801663B1 EP 2801663 B1 EP2801663 B1 EP 2801663B1 EP 14166448 A EP14166448 A EP 14166448A EP 2801663 B1 EP2801663 B1 EP 2801663B1
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EP
European Patent Office
Prior art keywords
milling drum
milling
stud
mounting
accordance
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EP14166448.2A
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German (de)
French (fr)
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EP2801663A1 (en
Inventor
Stefan Abresch
Dirk Brassel
Cyrus Barimani
Günter HÄHN
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Wirtgen GmbH
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Wirtgen GmbH
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Publication of EP2801663A1 publication Critical patent/EP2801663A1/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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49815—Disassembling
    • Y10T29/49817—Disassembling with other than ancillary treating or assembling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49947—Assembling or joining by applying separate fastener
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49947—Assembling or joining by applying separate fastener
    • Y10T29/49948—Multipart cooperating fastener [e.g., bolt and nut]

Definitions

  • the invention relates to a road milling machine, in particular small milling machine, for machining road surfaces according to the preamble of claim 1, and a method for assembling a cantilevered milling drum according to the preamble of claim 15.
  • the milling drum is in one piece.
  • the length of a milling drum for a small milling machine is smaller than its diameter.
  • milling drills for small milling machines have a diameter of 460 mm to 750 mm with a width between 250 mm and 600 mm.
  • milling rollers of a small milling machine are welded directly, while milling drills for large milling quick-change holder are used in which a base part is welded to the bandage, the a chisel holder interchangeably receives.
  • Such a small milling machine is known for example under the name Wirtgen W50 DC.
  • the basic construction of a generic road milling machine is from the DE 103 47 873 A1 known.
  • the small milling machine has a milling drum mounted on the machine frame in a roll box, which can be driven by a milling drum drive.
  • the known milling drum drive has a roller gear, which has at its free end a connecting flange with axially projecting stud bolts for mounting the milling drum.
  • the studs engage in a connecting flange of the milling drum in correspondingly arranged holes, so that the milling drum can be fastened by means of nuts to the roll gear.
  • the roller gear may further comprise a spigot, which cooperates with a corresponding central opening in the connecting flange of the overhung milling drum.
  • connection flange is not arranged axially in the middle of the milling drum, since the interior of the milling drum is about 2/3 of the milling drum drive claimed.
  • connection flange is usually located in a milling drum for small milling in the vicinity of the opposite end of the drive of the milling drum. Due to the resulting eccentric position of the center of gravity relative to the connecting flange, the milling drum tilts over the connecting flange during handling.
  • the soil is often uneven, which considerably changes the milling drum difficult.
  • the tools located on the milling drum produce an irregular three-dimensional surface structure of the milling drum, whereby it on a transport device z. B. a pallet truck not clearly definable inclined position occupies. If the milling drum lies on the lifting device with its high weight, it can no longer be rotated on the lifting device. In this respect, even with the aid of a lifting device mounting a milling drum to the roller gear is extremely difficult, the protruding studs of the roller gear can be easily damaged and then need to be replaced with additional assembly costs.
  • the invention is therefore based on the object to simplify the change of a milling drum and to facilitate the assembly and disassembly of a new milling drum while reducing the repair effort.
  • the invention provides that the Fräswalzenantrieb has at least one mounting pin which engages in a corresponding adapted to the mounting pin opening in the connection flange of the milling drum, wherein the mounting pin axially protrudes so far relative to the stud that the milling drum before engaging with the Stud bolt rests on the mounting pin.
  • the invention provides in an advantageous manner that the milling drum can first be pushed onto the mounting pin after mounting on the milling drum drive, which protrudes relative to the stud, so that it first on the orientation of the recesses, for. B. holes in the connection flange on the stud does not arrive and the milling drum can be supported on the mounting pin.
  • the milling drum can then be easily rotated on the mounting pin until the holes are aligned with the studs, then the milling drum can be pushed further until the milling drum is finally fully pushed onto the studs and a possible centering shoulder of the roller gear in a complementary central opening in Connecting flange of the milling drum engages. Thereafter, the milling drum can be permanently attached with the usual fasteners.
  • the at least one mounting pin is preferably replaceable. This allows replacement in the event that the mounting pin is damaged or even the mounting of mounting pins of different shape or diameter, and it also allows the alternative, not to mount the mounting pin, if milling drums of an older type of construction to be mounted, not with a Montagezapfen are compatible.
  • a further alternative is that the mounting pin is used only for assembly and dismantled to operate the road milling machine, because the mounting pin there, z. B. because of lack of space, can not remain.
  • a single mounting pin is provided coaxially with the milling drum drive and the milling drum.
  • the central arrangement of a single mounting pin allows a particularly simple and secure mounting of the milling drum.
  • the milling drum is designed in one piece and has a single axially eccentrically arranged connection flange.
  • the milling drum consists of a bandage, which carries the tools and a single connection flange for connection to the milling drum drive, so that there is a flying mounting of the milling drum. Since the milling drum drive projects into the milling drum, the connecting flange of the milling drum is off-center in the axial direction, ie. H. arranged in the last third of the milling drum.
  • the standing of the milling drum drive stud bolts are arranged on a bolt circle, wherein the mounting pin is arranged concentrically to the studs and radially inwardly relative to them.
  • the mounting pin can taper outwards. This facilitates the sliding of the milling drum with its central opening, since a less accurate positioning of the milling drum is sufficient to postpone this on the mounting pin can.
  • the central opening of the connecting flange can expand towards the milling drum drive.
  • the outer end face of the milling drum almost flush with the lateral outer side of the machine frame, the so-called zero side closes to allow the closest possible milling along obstacles.
  • the machine frame is preferably carried by a chassis with a front and rear axle with wheels, wherein the milling drum is arranged between the rear wheels.
  • This arrangement relates to the normal operation of the road milling machine, in which both rear wheels are arranged coaxially and preferably in a vertical plane with the Fräswalzenachse.
  • a pivotable rear wheel is provided, which can be pivoted to a position in front of the milling drum and relative to the neutral side inwards.
  • Such an arrangement is for example from the DE 196 31 042 A1 known.
  • the road milling machine is preferably a Häderfräsmaschine, in the direction of travel behind the milling drum a rear-loading transport device for the processed from the milling drum milled material is arranged.
  • a cap On the mounting pin a cap can be attached. This protects the ends of the studs and with the studs cooperating fasteners, for. As nuts, and prevents the fasteners are dirty or damaged in the milling operation.
  • the central opening in the connection flange of the milling drum may have an inner resting on the mounting pin support surface, which does not completely surround the mounting pin.
  • the multiple interrupted support surface facilitates the sliding of the milling drum on the mounting pin and reduces the effects of temperature changes, while ensuring a sufficient support surface is guaranteed.
  • the mounting pin is arranged coaxially to a spigot, wherein the mounting pin may also have at least on the side facing the spigot substantially the same outer diameter as the spigot. It is understood that in the case of a mounting pin a centering approach may be present, but not mandatory.
  • the mounting pin may be chamfered at its free end to facilitate the sliding of the milling drum.
  • Fig. 1 shown self-propelled road milling machine 1 for working on ground surfaces, z.
  • a small milling machine has a machine frame 4, and a drive motor 6 for the drive of driving devices 8 and working equipment.
  • the driving devices 8 are in the embodiment of the Fig. 1 made of wheels, but may also consist entirely or partially of crawler tracks.
  • the main working means consists of a milling drum 12 driven by a milling drum drive 10 for milling the ground surface.
  • Fig. 2 shows a perspective view of the mounted milling drum 12 with a connecting flange 14 and a bandage 16, which carries a plurality of systematically arranged tools 18.
  • Fig. 3 shows a section through a portion of the milling drum drive 10 and through the milling drum 12 prior to assembly.
  • the milling drum drive 10 has at its free end a coaxial with the output shaft, not shown, mounting pin 20 which is fastened via fastening means 22 replaceable on the milling drum drive 10.
  • stand of the milling drum 10 for example, seven arranged on a circular hole pattern stud bolts 24 axially, which cooperate in corresponding recesses 26 in the connection flange 14 to attach the connecting flange 14 and thus the milling drum 12 to the milling drum drive 10.
  • connection flange 14 has a central opening 28, which is adapted to the diameter of the mounting pin 20.
  • the central opening 28 may be circular or, for example, the Fig. 6 have apparent contour.
  • the mounting pin 20 may taper outwardly towards its free end to facilitate the sliding of the milling drum 12.
  • Fig. 4 shows the milling drum 12 in a pushed onto the mounting pin 20 state in which the studs 24 have not passed through the recesses 26, such as holes.
  • the milling drum 12 is completely pushed and fixed to the milling drum 10 fixed via cooperating with the stud bolts 26 fasteners 30.
  • a cap 32 may be secured via fastener 34 to the mounting pin 20, which protects all fasteners 24, 26, 28, 30 from dirt and damage.
  • the central opening 28 may be one as shown Fig. 6 can be seen resting on the mounting pin support surface 36 which does not completely surround the mounting pin 20.
  • the curved contours of the central opening 28 projecting between the support surfaces 36 may be adapted to a correspondingly formed centering projection 40 on the end face of the milling drum drive 10.
  • the centering lug 40 has the task of reducing the mechanical stress on the stud bolts 24 and centering the milling drum 12 exactly on the milling drum drive 10.
  • the mounting pin 20 does not necessarily have to have a circular cross-sectional contour, but for example, may also have a cross-sectional star-shaped or triangular shape.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Road Repair (AREA)

Description

Die Erfindung betrifft eine Straßenfräsmaschine, insbesondere Kleinfräse, zum Bearbeiten von Straßenoberflächen nach dem Oberbegriff des Anspruchs 1, sowie ein Verfahren zur Montage einer fliegend gelagerten Fräswalze nach dem Oberbegriff des Anspruchs 15.The invention relates to a road milling machine, in particular small milling machine, for machining road surfaces according to the preamble of claim 1, and a method for assembling a cantilevered milling drum according to the preamble of claim 15.

Aus der EP 1 194 651 A ist ein Fräswalzenschnellwechselsystem bekannt, bei dem die Fräswalze aufgeteilt ist und aus einem Walzengrundkörper und einem auf den Walzengrundkörper aufschiebbaren Fräsrohr besteht. Dadurch, dass nur das Fräsrohr ausgewechselt werden muss, ist die Handhabung für den Wechsel einer Fräswalze vereinfacht, so dass die für den Wechsel benötigte Zeit und der Arbeitsaufwand minimiert ist. Dieses Schnellwechselsystem betrifft aber im Wesentlichen Großfräsen mit einem Fräswalzendurchmesser von ca. 1 m bei einer Fräsbreite zwischen 1,50 m und 4,40 m.From the EP 1 194 651 A a Fräswalzenschnellwechselsystem is known in which the milling drum is divided and consists of a roller body and a slidable on the roller body milling tube. The fact that only the milling tube has to be replaced, the handling for changing a milling drum is simplified, so that the time required for the change and the amount of work is minimized. However, this quick-change system mainly relates to large milling machines with a milling drum diameter of approx. 1 m with a milling width between 1.50 m and 4.40 m.

Bei Kleinfräsen ist dagegen die Fräswalze einstückig. Typischerweise ist die Länge einer Fräswalze für eine Kleinfräse kleiner als deren Durchmesser. Beispielsweise haben Fräswalzen für Kleinfräsen einen Durchmesser von 460 mm bis 750 mm bei einer Breite zwischen 250 mm und 600 mm.For small milling, however, the milling drum is in one piece. Typically, the length of a milling drum for a small milling machine is smaller than its diameter. For example, milling drills for small milling machines have a diameter of 460 mm to 750 mm with a width between 250 mm and 600 mm.

Ein weiterer Unterschied zwischen den Fräswalzen einer Kleinfräse und einer Großfräse besteht darin, dass am Außenumfang der Bandage von Fräswalzen für Kleinfräsen Meißelhalter direkt aufgeschweißt sind, während bei Fräswalzen für Großfräsen Schnell-Wechselhalter verwendet werden, bei denen ein Basisteil auf der Bandage angeschweißt wird, das einen Meißelhalter auswechselbar aufnimmt.Another difference between the milling rollers of a small milling machine and a large milling machine is that on the outer circumference of the bandage of milling drums for small milling toolholders are welded directly, while milling drills for large milling quick-change holder are used in which a base part is welded to the bandage, the a chisel holder interchangeably receives.

Eine derartige Kleinfräse ist beispielsweise unter der Bezeichnung Wirtgen W50 DC bekannt. Die grundsätzliche Konstruktion einer gattungsgemäßen Straßenfräsmaschine ist aus der DE 103 47 873 A1 bekannt.Such a small milling machine is known for example under the name Wirtgen W50 DC. The basic construction of a generic road milling machine is from the DE 103 47 873 A1 known.

Die Kleinfräse weist eine an dem Maschinenrahmen in einem Walzenkasten gelagerte Fräswalze auf, die von einem Fräswalzenantrieb angetrieben werden kann.The small milling machine has a milling drum mounted on the machine frame in a roll box, which can be driven by a milling drum drive.

Der bekannte Fräswalzenantrieb weist ein Walzengetriebe auf, das an seinem freien Ende einen Anschlussflansch mit axial abstehenden Stehbolzen zur Montage der Fräswalze aufweist. Die Stehbolzen greifen in einen Anschlussflansch der Fräswalze in entsprechend angeordnete Bohrungen ein, so dass die Fräswalze mit Hilfe von Muttern an dem Walzengetriebe befestigt werden kann. Das Walzengetriebe kann desweiteren einen Zentrieransatz aufweisen, der mit einer entsprechenden zentralen Öffnung im Anschlussflansch der fliegend gelagerten Fräswalze zusammenwirkt.The known milling drum drive has a roller gear, which has at its free end a connecting flange with axially projecting stud bolts for mounting the milling drum. The studs engage in a connecting flange of the milling drum in correspondingly arranged holes, so that the milling drum can be fastened by means of nuts to the roll gear. The roller gear may further comprise a spigot, which cooperates with a corresponding central opening in the connecting flange of the overhung milling drum.

Die zum Einsatz kommenden Fräswalzen für Kleinfräsen haben üblicherweise ein hohes Gewicht von beispielsweise bis zu 300 kg. Sie sind daher zu schwer, um manuell montiert werden zu können. Die Handhabung einer einstückigen Fräswalze für Kleinfräsen wird auch dadurch erschwert, dass der Anschlussflansch axial nicht in der Mitte der Fräswalze angeordnet ist, da der Innenraum der Fräswalze zu ca. 2/3 von dem Fräswalzenantrieb beansprucht wird. Insofern befindet sich der Anschlussflansch bei einer Fräswalze für Kleinfräsen üblicherweise in der Nähe der dem Antrieb gegenüberliegenden Stirnseite der Fräswalze. Durch die daraus resultierende aussermittige Lage des Schwerpunkts relativ zum Anschlussflansch kippt die Fräswalze bei der Handhabung über den Anschlussflansch. Hinzu kommt, dass bei einem Wechsel der Fräswalze unter praktischen Bedingungen häufig der Boden uneben ist, was einen Wechsel der Fräswalze erheblich erschwert. Die auf der Fräswalze befindlichen Werkzeuge erzeugen eine unregelmäßige dreidimensionale Oberflächenstruktur der Fräswalze, wodurch diese auf einer Transporteinrichtung z. B. einem Gabelhubwagen eine nicht eindeutig definierbare schiefe Lage einnimmt. Liegt die Fräswalze mit ihrem hohen Gewicht auf der Hubvorrichtung, kann sie auf der Hubvorrichtung nicht mehr gedreht werden. Insofern ist auch bei Zuhilfenahme einer Hubvorrichtung das Montieren einer Fräswalze an das Walzengetriebe äußerst schwierig, wobei die vorstehenden Stehbolzen des Walzengetriebes leicht beschädigt werden können und dann mit zusätzlichem Montageaufwand ausgewechselt werden müssen.The used for small milling cutters usually have a high weight of, for example, up to 300 kg. They are therefore too heavy to be mounted manually. The handling of a one-piece milling drum for small milling is also complicated by the fact that the connection flange is not arranged axially in the middle of the milling drum, since the interior of the milling drum is about 2/3 of the milling drum drive claimed. In this respect, the connection flange is usually located in a milling drum for small milling in the vicinity of the opposite end of the drive of the milling drum. Due to the resulting eccentric position of the center of gravity relative to the connecting flange, the milling drum tilts over the connecting flange during handling. In addition, when changing the milling drum under practical conditions, the soil is often uneven, which considerably changes the milling drum difficult. The tools located on the milling drum produce an irregular three-dimensional surface structure of the milling drum, whereby it on a transport device z. B. a pallet truck not clearly definable inclined position occupies. If the milling drum lies on the lifting device with its high weight, it can no longer be rotated on the lifting device. In this respect, even with the aid of a lifting device mounting a milling drum to the roller gear is extremely difficult, the protruding studs of the roller gear can be easily damaged and then need to be replaced with additional assembly costs.

Der Erfindung liegt daher die Aufgabe zugrunde, den Wechsel einer Fräswalze zu vereinfachen und die Montage und Demontage einer neuen Fräswalze zu erleichtern und dabei gleichzeitig den Reparaturaufwand zu verringern.The invention is therefore based on the object to simplify the change of a milling drum and to facilitate the assembly and disassembly of a new milling drum while reducing the repair effort.

Zur Lösung dieser Aufgabe ist erfindungsgemäß vorgesehen, dass der Fräswalzenantrieb mindestens einen Montagezapfen aufweist, der in eine entsprechende an den Montagezapfen angepasste Öffnung im Anschlussflansch der Fräswalze eingreift, wobei der Montagezapfen gegenüber den Stehbolzen axial so weit vorsteht, dass die Fräswalze vor dem Eingriff mit den Stehbolzen auf dem Montagezapfen aufliegt.To achieve this object, the invention provides that the Fräswalzenantrieb has at least one mounting pin which engages in a corresponding adapted to the mounting pin opening in the connection flange of the milling drum, wherein the mounting pin axially protrudes so far relative to the stud that the milling drum before engaging with the Stud bolt rests on the mounting pin.

Die Erfindung sieht in vorteilhafter Weise vor, dass die Fräswalze bei der Montage nach Ausrichtung auf den Fräswalzenantrieb zunächst auf den Montagezapfen aufgeschoben werden kann, der gegenüber den Stehbolzen vorsteht, so dass es zunächst auf die Ausrichtung der Aussparungen, z. B. Bohrungen im Anschlussflansch auf die Stehbolzen nicht ankommt und die Fräswalze auf dem Montagezapfen abgestützt werden kann. Die Fräswalze kann dann auf dem Montagezapfen leicht gedreht werden, bis die Bohrungen zu den Stehbolzen fluchten, wobei dann die Fräswalze weiter aufgeschoben werden kann, bis die Fräswalze letztlich vollständig auf die Stehbolzen aufgeschoben ist und ein möglicher Zentrieransatz des Walzengetriebes in eine komplementäre zentrale Öffnung im Anschlussflansch der Fräswalze eingreift. Danach kann die Fräswalze mit den üblichen Befestigungsmitteln dauerhaft befestigt werden.The invention provides in an advantageous manner that the milling drum can first be pushed onto the mounting pin after mounting on the milling drum drive, which protrudes relative to the stud, so that it first on the orientation of the recesses, for. B. holes in the connection flange on the stud does not arrive and the milling drum can be supported on the mounting pin. The milling drum can then be easily rotated on the mounting pin until the holes are aligned with the studs, then the milling drum can be pushed further until the milling drum is finally fully pushed onto the studs and a possible centering shoulder of the roller gear in a complementary central opening in Connecting flange of the milling drum engages. Thereafter, the milling drum can be permanently attached with the usual fasteners.

Der mindestens eine Montagezapfen ist vorzugsweise auswechselbar. Dies ermöglicht einen Austausch für den Fall, dass der Montagezapfen beschädigt wird oder auch die Montage von Montagezapfen unterschiedlicher Form oder Durchmesser, und es erlaubt auch die Alternative, den Montagezapfen nicht zu montieren, wenn Fräswalzen eines älteren Bautyps montiert werden sollen, die nicht mit einem Montagezapfen kompatibel sind.Eine weitere Alternative besteht darin, dass der Montagezapfen nur für die Montage eingesetzt wird und zum Betrieb der Straßenfräsmaschine demontiert wird, weil der Montagezapfen dort, z. B. wegen mangelnden Bauraums, nicht verbleiben kann.The at least one mounting pin is preferably replaceable. This allows replacement in the event that the mounting pin is damaged or even the mounting of mounting pins of different shape or diameter, and it also allows the alternative, not to mount the mounting pin, if milling drums of an older type of construction to be mounted, not with a Montagezapfen are compatible. A further alternative is that the mounting pin is used only for assembly and dismantled to operate the road milling machine, because the mounting pin there, z. B. because of lack of space, can not remain.

Vorzugsweise ist ein einziger Montagezapfen koaxial zum Fräswalzenantrieb und zur Fräswalze vorgesehen. Die zentrale Anordnung eines einzigen Montagezapfens ermöglicht eine besonders einfache und sichere Montage der Fräswalze.Preferably, a single mounting pin is provided coaxially with the milling drum drive and the milling drum. The central arrangement of a single mounting pin allows a particularly simple and secure mounting of the milling drum.

Vorzugsweise ist die Fräswalze einstückig gestaltet und weist einen einzigen axial außermittig angeordneten Anschlussflansch auf. Die Fräswalze besteht aus einer Bandage, die die Werkzeuge trägt und einem einzigen Anschlussflansch zum Anschluss an den Fräswalzenantrieb, so dass sich eine fliegende Lagerung der Fräswalze ergibt. Da der Fräswalzenantrieb in die Fräswalze hineinragt, ist der Anschlussflansch der Fräswalze in Axialrichtung außermittig, d. h. im Bereich des letzten Drittels der Fräswalze angeordnet.Preferably, the milling drum is designed in one piece and has a single axially eccentrically arranged connection flange. The milling drum consists of a bandage, which carries the tools and a single connection flange for connection to the milling drum drive, so that there is a flying mounting of the milling drum. Since the milling drum drive projects into the milling drum, the connecting flange of the milling drum is off-center in the axial direction, ie. H. arranged in the last third of the milling drum.

Die von dem Fräswalzenantrieb abstehenden Stehbolzen sind auf einem Lochkreis angeordnet, wobei der Montagezapfen zu den Stehbolzen konzentrisch und relativ zu ihnen radial innen angeordnet ist.The standing of the milling drum drive stud bolts are arranged on a bolt circle, wherein the mounting pin is arranged concentrically to the studs and radially inwardly relative to them.

Der Montagezapfen kann sich nach außen verjüngen. Dadurch wird das Aufschieben der Fräswalze mit ihrer zentralen Öffnung erleichtert, da eine weniger genaue Positionierung der Fräswalze genügt, um diese auf den Montagezapfen aufschieben zu können.The mounting pin can taper outwards. This facilitates the sliding of the milling drum with its central opening, since a less accurate positioning of the milling drum is sufficient to postpone this on the mounting pin can.

Alternativ oder zusätzlich kann sich die zentrale Öffnung des Anschlussflansches zum Fräswalzenantrieb hin erweitern.Alternatively or additionally, the central opening of the connecting flange can expand towards the milling drum drive.

Bei einem bevorzugten Ausführungsbeispiel ist vorgesehen, dass die äußere Stirnseite der Fräswalze nahezu bündig mit der seitlichen Außenseite des Maschinenrahmens, der sogenannten Nullseite, abschließt, um ein möglichst nahes Fräsen entlang von Hindernissen zu ermöglichen. Dabei ist der Maschinenrahmen vorzugsweise von einem Fahrwerk mit einer Vorder- und Hinterachse mit Rädern getragen, wobei die Fräswalze zwischen den Hinterrädern angeordnet ist. Diese Anordnung betrifft den Normalbetrieb der Straßenfräsmaschine, bei der beide Hinterräder koaxial und vorzugsweise in einer vertikalen Ebene mit der Fräswalzenachse angeordnet sind. Für den kantennahen Betrieb kann es sein, dass auf der Nullseite ein schwenkbares Hinterrad vorgesehen ist, das in eine Position vor die Fräswalze und relativ zur Nullseite nach innen verschwenkt werden kann. Eine derartige Anordnung ist beispielsweise aus der DE 196 31 042 A1 bekannt.In a preferred embodiment, it is provided that the outer end face of the milling drum almost flush with the lateral outer side of the machine frame, the so-called zero side closes to allow the closest possible milling along obstacles. In this case, the machine frame is preferably carried by a chassis with a front and rear axle with wheels, wherein the milling drum is arranged between the rear wheels. This arrangement relates to the normal operation of the road milling machine, in which both rear wheels are arranged coaxially and preferably in a vertical plane with the Fräswalzenachse. For near-edge operation, it may be that on the null side, a pivotable rear wheel is provided, which can be pivoted to a position in front of the milling drum and relative to the neutral side inwards. Such an arrangement is for example from the DE 196 31 042 A1 known.

Die Straßenfräsmaschine ist vorzugsweise eine Hinterladerfräsmaschine, bei der in Fahrtrichtung hinter der Fräswalze eine nach hinten abladende Transportvorrichtung für das von der Fräswalze abgearbeitete Fräsgut angeordnet ist.The road milling machine is preferably a Hinterladerfräsmaschine, in the direction of travel behind the milling drum a rear-loading transport device for the processed from the milling drum milled material is arranged.

An dem Montagezapfen kann eine Abdeckkappe befestigt sein. Diese schützt die Enden der Stehbolzen und mit den Stehbolzen zusammenwirkenden Befestigungsmitteln, z. B. Muttern, und verhindert, dass die Befestigungsmittel im Fräsbetrieb verschmutzt oder beschädigt werden.On the mounting pin a cap can be attached. This protects the ends of the studs and with the studs cooperating fasteners, for. As nuts, and prevents the fasteners are dirty or damaged in the milling operation.

Die zentrale Öffnung im Anschlussflansch der Fräswalze kann eine innere, auf dem Montagezapfen aufliegende Stützfläche aufweisen, die den Montagezapfen nicht vollständig umschließt. Die mehrfach unterbrochene Stützfläche erleichtert das Aufschieben der Fräswalze auf den Montagezapfen und reduziert die Auswirkungen von Temperaturänderungen, wobei gleichzeitig ein ausreichende Stützfläche gewährleistet ist.The central opening in the connection flange of the milling drum may have an inner resting on the mounting pin support surface, which does not completely surround the mounting pin. The multiple interrupted support surface facilitates the sliding of the milling drum on the mounting pin and reduces the effects of temperature changes, while ensuring a sufficient support surface is guaranteed.

Vorzugsweise ist der Montagezapfen koaxial zu einem Zentrieransatz angeordnet, wobei der Montagezapfen außerdem zumindest auf der dem Zentrieransatz zugewandten Seite im Wesentlichen den gleichen Außendurchmesser wie der Zentrieransatz aufweisen kann. Es versteht sich, dass im Falle eines Montagezapfens ein Zentrieransatz vorhanden sein kann, aber nicht zwingend notwendig ist.Preferably, the mounting pin is arranged coaxially to a spigot, wherein the mounting pin may also have at least on the side facing the spigot substantially the same outer diameter as the spigot. It is understood that in the case of a mounting pin a centering approach may be present, but not mandatory.

Der Montagezapfen kann an seinem freien Ende angefast sein, um das Aufschieben der Fräswalze zu erleichtern.The mounting pin may be chamfered at its free end to facilitate the sliding of the milling drum.

Bei einem Verfahren zur Montage einer fliegend gelagerten Fräswalze in einer Straßenfräsmaschine, insbesondere Kleinfräse, zum Bearbeiten von Straßenoberflächen, bei dem die Fräswalze von einem Fräswalzenantrieb angetrieben wird, wobei von dem Fräswalzenantrieb Stehbolzen zur Montage der Fräswalze abstehen, die in entsprechend angeordnete Aussparungen oder Bohrungen in einen Anschlussflansch der Fräswalze eingreifen, sind in vorteilhafter Weise folgende Schritte vorgesehen:

  • Das Anheben und Ausrichten der Fräswalze auf den Fräswalzenantrieb,
  • das Aufschieben der Fräswalze auf einen von dem Fräswalzenantrieb weiter als die Stehbolzen vorstehenden Montagezapfen, derart, dass der Anschlussflansch mit seiner zentralen Öffnung auf dem Montagezapfen aufliegt,
  • das Drehen der Fräswalze um den Montagezapfen bis die Stehbolzen des Walzenantriebs mit den entsprechenden Bohrungen im Anschlussflansch fluchten,
  • das weitere Aufschieben der Fräswalze bis zum Austritt der Stehbolzen aus den Bohrungen des Anschlussflanschs, und - das Befestigen der Fräswalze mit Hilfe der Stehbolzen und entsprechenden Befestigungsmuttern.
In a method for mounting a cantilevered milling drum in a road milling machine, especially small milling machine, for machining road surfaces, in which the milling drum is driven by a milling drum drive, projecting from the milling drum drive stud bolts for mounting the milling drum, which are arranged in corresponding recesses or holes in engage a connecting flange of the milling drum, the following steps are advantageously provided:
  • Raising and aligning the milling drum with the milling drum drive,
  • pushing the milling drum onto one of the milling drum drive further than the studs projecting mounting pin, such that the connecting flange rests with its central opening on the mounting pin,
  • turning the milling drum around the mounting pin until the stud bolts of the roller drive are aligned with the corresponding holes in the connecting flange,
  • the further sliding of the milling drum until the studs exit the bores of the connecting flange, and - the milling drum is fastened by means of stud bolts and corresponding fastening nuts.

Im Folgenden wird unter Bezugnahme auf die Zeichnungen ein Ausführungsbeispiel der Erfindung näher erläutert.In the following an embodiment of the invention will be explained in more detail with reference to the drawings.

Es zeigen:

Fig. 1
eine Kleinfräse,
Fig. 2
eine perspektivische Ansicht der Fräswalze einer erfindungsgemäßen Straßenfräsmaschine,
Fig. 3
ein Schnitt durch einen Teil des Walzengetriebes und die Fräswalze vor dem Aufschieben der Fräswalze,
Fig. 4
die Fräswalze in einem auf den Montagezapfen aufgeschobenen Zustand vor dem Eingriff mit den Stehbolzen,
Fig. 5
die Fräswalze im befestigten Zustand, und[in der Figur fehlen die Muttern, aber die Schutzhaube ist schon montiert!]
Fig. 6
eine Stirnseitenansicht des freien Endes der Fräswalze.
Show it:
Fig. 1
a small milling machine,
Fig. 2
a perspective view of the milling drum of a road milling machine according to the invention,
Fig. 3
a section through a part of the roller gear and the milling drum before pushing the milling drum,
Fig. 4
the milling drum in a pushed onto the mounting pin state before engagement with the studs,
Fig. 5
the milling drum in the attached state, and [in the figure, the nuts are missing, but the protective cover is already mounted!]
Fig. 6
an end view of the free end of the milling drum.

Die in Fig. 1 gezeigte selbstfahrende Straßenfräsmaschine 1 zum Bearbeiten von Bodenoberflächen, z. B. eine Kleinfräse, weist einen Maschinenrahmen 4 auf, sowie einen Antriebsmotor 6 für den Antrieb von Fahreinrichtungen 8 und von Arbeitseinrichtungen. Die Fahreinrichtungen 8 bestehen in dem Ausführungsbeispiel der Fig. 1 aus Rädern, können aber ganz oder teilweise auch aus Kettenlaufwerken bestehen. Die hauptsächliche Arbeitseinrichtung besteht aus einer von einem Fräswalzenantrieb 10 antreibbaren Fräswalze 12 zum Fräsen der Bodenoberfläche.In the Fig. 1 shown self-propelled road milling machine 1 for working on ground surfaces, z. As a small milling machine, has a machine frame 4, and a drive motor 6 for the drive of driving devices 8 and working equipment. The driving devices 8 are in the embodiment of the Fig. 1 made of wheels, but may also consist entirely or partially of crawler tracks. The main working means consists of a milling drum 12 driven by a milling drum drive 10 for milling the ground surface.

Fig. 2 zeigt eine perspektivische Ansicht der montierten Fräswalze 12 mit einem Anschlussflansch 14 und einer Bandage 16, die eine Vielzahl von systematisch angeordneten Werkzeugen 18 trägt. Fig. 2 shows a perspective view of the mounted milling drum 12 with a connecting flange 14 and a bandage 16, which carries a plurality of systematically arranged tools 18.

Fig. 3 zeigt einen Schnitt durch einen Teil des Fräswalzenantriebs 10 und durch die Fräswalze 12 vor der Montage. Der Fräswalzenantrieb 10 weist an seinem freien Ende einen koaxial zur nicht dargestellten Abtriebswelle verlaufenden Montagezapfen 20 auf, der über Befestigungsmittel 22 auswechselbar an dem Fräswalzenantrieb 10 befestigt ist. Desweiteren stehen von dem Fräswalzenantrieb 10 beispielsweise sieben auf einem kreisförmigen Lochbild angeordnete Stehbolzen 24 axial ab, die in entsprechende Aussparungen 26 im Anschlussflansch 14 zusammenwirken, um den Anschlussflansch 14 und damit die Fräswalze 12 an dem Fräswalzenantrieb 10 zu befestigen. Fig. 3 shows a section through a portion of the milling drum drive 10 and through the milling drum 12 prior to assembly. The milling drum drive 10 has at its free end a coaxial with the output shaft, not shown, mounting pin 20 which is fastened via fastening means 22 replaceable on the milling drum drive 10. Furthermore, stand of the milling drum 10, for example, seven arranged on a circular hole pattern stud bolts 24 axially, which cooperate in corresponding recesses 26 in the connection flange 14 to attach the connecting flange 14 and thus the milling drum 12 to the milling drum drive 10.

Desweiteren weist der Anschlussflansch 14 eine zentrale Öffnung 28 auf, die dem Durchmesser des Montagezapfens 20 angepasst ist. Die zentrale Öffnung 28 kann kreisrund sein oder beispielsweise die aus Fig. 6 ersichtliche Kontur aufweisen. Der Montagezapfen 20 kann sich nach außen zu seinem freien Ende hin verjüngen, um das Aufschieben der Fräswalze 12 zu erleichtern.Furthermore, the connection flange 14 has a central opening 28, which is adapted to the diameter of the mounting pin 20. The central opening 28 may be circular or, for example, the Fig. 6 have apparent contour. The mounting pin 20 may taper outwardly towards its free end to facilitate the sliding of the milling drum 12.

Fig. 4 zeigt die Fräswalze 12 in einem auf dem Montagezapfen 20 aufgeschobenen Zustand, bei dem die Stehbolzen 24 noch nicht durch die Aussparungen 26, beispielsweise Bohrungen, hindurchgetreten sind. Fig. 4 shows the milling drum 12 in a pushed onto the mounting pin 20 state in which the studs 24 have not passed through the recesses 26, such as holes.

In der in Fig. 5 gezeigten Position ist die Fräswalze 12 vollständig aufgeschoben und an dem Fräswalzenantrieb 10 fest über mit den Stehbolzen 26 zusammenwirkende Befestigungsmittel 30 befestigt. Zusätzlich kann eine Abdeckkappe 32 über Befestigungsmittel 34 an dem Montagezapfen 20 befestigt sein, die sämtliche Befestigungsmittel 24, 26, 28, 30 vor Verschmutzung und Beschädigung schützt.In the in Fig. 5 shown position, the milling drum 12 is completely pushed and fixed to the milling drum 10 fixed via cooperating with the stud bolts 26 fasteners 30. In addition, a cap 32 may be secured via fastener 34 to the mounting pin 20, which protects all fasteners 24, 26, 28, 30 from dirt and damage.

Die zentrale Öffnung 28 kann eine, wie aus Fig. 6 ersichtlich, auf den Montagezapfen aufliegende Stützfläche 36 aufweisen, die den Montagezapfen 20 nicht vollständig umschließt. Die zwischen den Stützflächen 36 vorstehenden gebogenen Konturen der zentralen Öffnung 28 können an einen entsprechend ausgebildeten Zentrieransatz 40 an der Stirnseite des Fräswalzenantriebs 10 angepasst sein. Der Zentrieransatz 40 hat die Aufgabe, die mechanische Belastung der Stehbolzen 24 zu reduzieren und die Fräswalze 12 exakt auf dem Fräswalzenantrieb 10 zu zentrieren.The central opening 28 may be one as shown Fig. 6 can be seen resting on the mounting pin support surface 36 which does not completely surround the mounting pin 20. The curved contours of the central opening 28 projecting between the support surfaces 36 may be adapted to a correspondingly formed centering projection 40 on the end face of the milling drum drive 10. The centering lug 40 has the task of reducing the mechanical stress on the stud bolts 24 and centering the milling drum 12 exactly on the milling drum drive 10.

Es versteht sich aber, dass der Montagezapfen 20 vollständig die Funktion des Zentrieransatzes 40 übernehmen kann, so dass kein zusätzlicher Zentrieransatz 40 notwendig ist.It is understood, however, that the mounting pin 20 can completely take over the function of the centering lug 40, so that no additional centering lug 40 is necessary.

Desweiteren versteht sich, dass der Montagezapfen 20 nicht zwangsläufig eine kreisförmige Querschnittskontur aufweisen muss, sondern beispielsweise auch eine im Querschnitt sternförmige oder dreieckförmige Form aufweisen kann.Furthermore, it is understood that the mounting pin 20 does not necessarily have to have a circular cross-sectional contour, but for example, may also have a cross-sectional star-shaped or triangular shape.

Claims (15)

  1. Road milling machine, in particular small milling machine (1), for working road surfaces,
    with a machine frame (4),
    with a milling drum (12) supported at the machine frame (4) and capable of being driven by a milling drum drive (10),
    where stud bolts (24) for mounting the milling drum (12) project from the milling drum drive (10), said stud bolts, in mounted condition, engaging with cut-outs (26) arranged accordingly in a connecting flange (14) of the milling drum (12),
    characterized in that
    the milling drum drive (10) comprises, as a minimum, one mounting stud (20) which engages with a corresponding opening (28) adapted to said mounting stud (20) in the connecting flange (14) of the milling drum (12), wherein the mounting stud (20) projects axially vis-à-vis the stud bolts (24) to such an extent that the milling drum (12) rests on the mounting stud (20) prior to engaging with the stud bolts (24).
  2. Road milling machine in accordance with claim 1, characterized in that the at least one mounting stud (20) is of replaceable design.
  3. Road milling machine in accordance with claim 1 or 2, characterized in that a single mounting stud (20) is arranged coaxially to the milling drum drive (10).
  4. Road milling machine in accordance with one of the claims 1 to 3, characterized in that the milling drum (12) is of integral design and comprises a single, axially eccentrically arranged connecting flange (14).
  5. Road milling machine in accordance with one of the claims 1 to 4, characterized in that the stud bolts (24) projecting from the milling drum drive (10) are arranged on a circular hole pattern and that the mounting stud (20) is arranged concentrically and radially inside relative to the stud bolts (24).
  6. Road milling machine in accordance with one of the claims 1 to 5, characterized in that the mounting stud (20) tapers towards the outside.
  7. Road milling machine in accordance with one of the claims 1 to 6, characterized in that the outer front end of the milling drum (12) ends nearly flush with the lateral outer side of the machine frame (4), the so-called zero-clearance side, in order to enable milling as close along any obstacles as possible.
  8. Device in accordance with one of the claims 1 to 7, characterized in that the machine frame (4) is supported by a chassis comprising a front axle and a rear axle with wheels (8) or crawler tracks and that the milling drum (12) is arranged between the wheels or crawler tracks of the rear axle.
  9. Device in accordance with claim 8, characterized in that the wheel or crawler track (8) of the rear axle located on the zero-clearance side can be pivoted from an outer position, in which it is located essentially coaxially to the other wheel or crawler track of the rear axle, to an inner position in front of the milling drum (12) and inwards relative to the zero-clearance side.
  10. Device in accordance with one of the claims 1 to 9, characterized in that a transport device for the milled material worked off by the milling drum (12) discharging towards the rear is arranged behind the milling drum (12) as seen in the direction of travel.
  11. Device in accordance with one of the claims 1 to 10, characterized in that a cover cap (32) is attachable at the mounting stud (20).
  12. Device in accordance with one of the claims 1 to 11, characterized in that the central opening (28) in the connecting flange of the milling drum (12) comprises an inner supporting surface (36) resting on the mounting stud (20), said supporting surface (36) not fully enclosing the mounting stud (20).
  13. Device in accordance with one of the claims 1 to 12, characterized in that the milling drum drive (10) additionally comprises a centring spigot (40) which interacts with the central opening (28) in the connecting flange (14) of the milling drum (12), and that the centring spigot (40) is arranged coaxially to the mounting stud (20).
  14. Device in accordance with claim 1 to 13, characterized in that the largest outer diameter of the mounting stud (20) essentially corresponds to the outer diameter of the centring device (40).
  15. Method for mounting a cantilevered milling drum (12) in a road milling machine, in particular small milling machine (1), for working road surfaces, in which the milling drum (12) is driven by a milling drum drive (10),
    where stud bolts (24) for mounting the milling drum (12) project from the milling drum drive (10), said stud bolts (24) engaging with cut-outs (26) arranged accordingly in a connecting flange (14) of the milling drum (12),
    characterized by
    - lifting and aligning the milling drum (12) to the milling drum drive (10),
    - pushing the milling drum (12) onto a mounting stud (20) projecting from the milling drum drive (10) further than the stud bolts (24) in such a fashion that the connecting flange (14), with its central opening (28), rests on the mounting stud (20),
    - turning the milling drum (12) about the mounting stud (20) until the stud bolts (24) of the milling drum drive (10) are in alignment with the corresponding drill holes in the connecting flange (14),
    - pushing the milling drum (12) on further until the stud bolts (24) exit from the drill holes of the connecting flange (14), and
    - fastening the milling drum (12) by means of the stud bolts (24) and corresponding fastening means (30).
EP14166448.2A 2013-05-10 2014-04-29 Road milling machine, and method for mounting a floating milling drum Active EP2801663B1 (en)

Applications Claiming Priority (1)

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DE102013208638.5A DE102013208638B4 (en) 2013-05-10 2013-05-10 Road milling machine, as well as methods for mounting a flying mounted milling drum

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US20140333118A1 (en) 2014-11-13
DE102013208638A1 (en) 2014-11-13
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CN104141278A (en) 2014-11-12
US9234320B2 (en) 2016-01-12
CN204151656U (en) 2015-02-11

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