EP2025812A2 - Scraper device and construction machine - Google Patents

Scraper device and construction machine Download PDF

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Publication number
EP2025812A2
EP2025812A2 EP08159106A EP08159106A EP2025812A2 EP 2025812 A2 EP2025812 A2 EP 2025812A2 EP 08159106 A EP08159106 A EP 08159106A EP 08159106 A EP08159106 A EP 08159106A EP 2025812 A2 EP2025812 A2 EP 2025812A2
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EP
European Patent Office
Prior art keywords
scraper blade
scraper
stripping device
pivot axis
machine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08159106A
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German (de)
French (fr)
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EP2025812B1 (en
EP2025812A3 (en
Inventor
Heinz Kötting
Herbert Ley
Günter Dr. Hähn
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Wirtgen GmbH
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Wirtgen GmbH
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Application filed by Wirtgen GmbH filed Critical Wirtgen GmbH
Priority to EP17169983.8A priority Critical patent/EP3231940A1/en
Publication of EP2025812A2 publication Critical patent/EP2025812A2/en
Publication of EP2025812A3 publication Critical patent/EP2025812A3/en
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Classifications

    • 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
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/78—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices with rotating digging elements
    • E02F3/783—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices with rotating digging elements having a horizontal axis of rotation
    • 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
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/76—Graders, bulldozers, or the like with scraper plates or ploughshare-like elements; Levelling scarifying devices
    • E02F3/7636—Graders with the scraper blade mounted under the tractor chassis
    • E02F3/7645—Graders with the scraper blade mounted under the tractor chassis with the scraper blade being pivotable about a horizontal axis disposed parallel to the blade

Definitions

  • the invention relates to a stripping device according to the preamble of claim 1, as well as a construction machine according to the preamble of claim 15.
  • a stripping device for a milling machine mounted in a construction machine on a machine frame in side walls with a height-adjustable behind the milling drum in the direction of travel scraper blade is from the DE 10 2005 058 102 known.
  • the lower part of the scraper blade can slide over the milled by the milling drum bottom surface, the scraper blade is guided adjustable in height relative to the milling drum.
  • the invention is therefore an object of the invention to provide a stripping and a self-propelled construction machine, in particular road milling machine whose scraper blade is pivotable with a large swivel angle at a small swivel radius, which implements a low height and requires no manual operation.
  • the invention provides advantageously that the upper part of the scraper blade is pivotally mounted at the upper end about a parallel to the Fräswalzenachse pivot axis, that the scraper blade is in the operating position with lateral holding means in the side walls in engagement with the scraper blade in a hold substantially orthogonal to the bottom surface extending position that a pivoting device to the scraper blade the pivot axis can pivot when the scraper blade is out of engagement with the lateral support means, and that the pivot means at the upper end of the upper scraper blade has an articulated between a fixed part of the construction machine and the upper part of the scraper blade actuator.
  • the pivoting means comprises an actuating device which is articulated to save space at the upper end of the upper Abstreifschildes between a stationary part of the construction machine and the upper part of the scraper blade.
  • the actuator is therefore independent of lift cylinders of the scraper blade and can pivot the scraper blade about a first pivot axis when the scraper blade is out of engagement with the lateral supports.
  • the arrangement of the actuator a large swivel angle is possible because the scraper blade can be pivoted by 90 ° and more.
  • a small swivel radius is achieved because the lifting cylinder and thus the scraper blade even after completion of the actual lifting movement no further stroke for an additional pivotal movement must be prepared.
  • a low overall height of the pivoting device is realized in that the actuating device is preferably arranged horizontally.
  • the pivoting of the scraper blade is completely automatic, without manual operation is required.
  • the actuator may be arranged substantially orthogonal to the scraper blade.
  • the pivot means should not increase the height of the stripping.
  • the holding devices and the scraper blade have parallel to the Fräswalzenachse arranged locking means, the shield side at the two vertical side edges of the scraper blade each having at least a first locking means, the machine side with second, the first locking means adapted locking means cooperates when the scraper blade itself is in operating position or not fully raised.
  • the actuating device on the upper part of the scraper blade engages below the pivot axis at a joint of the scraper blade.
  • the pivot axis of the scraper blade has a vertical and horizontal distance to the common joint of the scraper blade and the actuating device.
  • the pivot axis is vertically higher relative to the hinge of the scraper blade and horizontally offset rearwardly relative to the scraper blade, i. offset in the direction away from the milling drum direction to the rear.
  • the machine-side joint of the actuating device is also arranged on the stationary part of the construction machine below a horizontal plane through the pivot axis.
  • the hinge of the scraper blade is mounted in the plane of the upper part of the scraper blade or at a small distance from this plane.
  • the aforementioned features allow favorable leverage and a small pivot radius in that the two parts of the scraper blade are completely moved together, and that a separate pivoting device is provided.
  • a large swivel angle of over 90 ° is achieved with a compact design.
  • the pivot axis is mounted on a stationary part of the construction machine, in particular on the machine frame or a surrounding the milling drum fixed to the machine frame roller box.
  • the lower part of the scraper blade is in the operating position with lateral holding devices in engagement and that a pivoting device pivot the scraper blade about the pivot axis can, when the lower part of the scraper blade is out of engagement with the lateral holding devices.
  • the holding devices on the machine side on both sides of the scraper blade each have at least one horizontal projection in the direction of the scraper projection which is in engagement with a vertically extending strip on the respective side edge of the lower part of the scraper blade when the scraper blade is in Operating position is or is not fully raised.
  • the projection consists of a rotatable sliding block, which is rotatable about an axis parallel to the Fräswalzenachse axis.
  • the sliding block preferably has a rectangular shape with a square cross-section.
  • the lower part is liftable with a lifting device relative to the upper part until the lower part is out of engagement with the lateral holding means.
  • the lower part of the scraper blade is raised until it is moved beyond the provided on both sides sliding blocks. If the scraper blade is returned to the operating position, these steps are carried out in the reverse order.
  • the lower part of the scraper blade threads itself behind the two-sided sliding blocks.
  • the guides of the scraper blade are provided with chamfers or curves, wherein the sliding blocks themselves are rotatably mounted. This storage also causes the largest possible contact surface and thus low surface pressures that lead to low wear.
  • the protrusions are automatically retractable outwards to release the lower part of the scraper blade, when the lower part of the scraper blade is raised sufficiently.
  • the upper part of the scraper as seen in the direction of travel is supported on the sliding blocks and not the lower part.
  • the locking means are unlocked to release the upper part of the scraper blade when the lower part of the scraper blade is sufficiently or fully raised.
  • the lower part is lifted with a lifting device relative to the upper part until the upper part is out of engagement with the lateral holding devices.
  • the lower part of the scraper blade has an unlocking device which unlocks the locking means upon lifting of the lower part of the scraper blade after a predetermined stroke, so that the scraper blade is pivotable due to the unlocking.
  • the holding devices have on both sides of the scraper blade at least one parallel to the Fräswalzenachse in the direction of the orthogonal to the scraper blade extending side walls protruding shield-side projection as a first locking means which engages in a recess as a second locking means in the side walls when the scraper blade is in the operating position or not fully raised.
  • the locking bolt may be retractable inwardly to release the upper portion of the scraper blade when the lower portion of the scraper blade is sufficiently or fully raised.
  • the invention also relates to a construction machine, in particular a self-propelled road milling machine with a stripping device according to the aforementioned features.
  • the invention also relates to a construction machine, in particular a self-propelled road milling machine with the stripping device according to the invention.
  • Fig. 1 shows a self-propelled road milling machine 1 in the design of a large milling machine, in which a milling drum 6 between front and rear suspensions 2,3 is mounted with a Fräswalzenachse 5 in side walls 8 of the machine frame 4.
  • the milling drum 6 is surrounded by a roller box 7 fixed to the machine frame 4, which has a stripping device with a two-part scraper blade 10 at the rear end in the direction of travel.
  • the lower part 12 of the scraper blade 10 can slide during operation on the milled from the milling drum 6 bottom surface 9, wherein the lower part 12 of the scraper blade 10 is adjustable in height relative to the milling drum 6.
  • the stripping device with a two-part scraper blade 10 can of course also be used in other road milling machines of a different design.
  • a height-adjustable side plate 11 may additionally be provided as edge protection for the milling edge.
  • Fig.2 shows a first embodiment of a scraper with a two-part scraper blade 10, in which the upper part 14 of the scraper blade 10 is pivotally mounted at the upper end 16 pivotally about an axis parallel to the Fräswalzenachse 5 pivot axis 18.
  • the scraper blade 10 is in the operative position with lateral support means 20 in the side walls 8 in engagement, which hold the scraper blade 10 in a substantially orthogonal to the bottom surface 9 extending position.
  • lateral support means 20 in the side walls 8 in engagement, which hold the scraper blade 10 in a substantially orthogonal to the bottom surface 9 extending position.
  • Fig. 1 is the lower part 12 of the scraper blade 10 in engagement with sliding blocks 24 which are rotatably supported on both sides of the lower part 12 of the scraper blade 10 in the side walls 8.
  • the lower part 12 is provided at its vertical side edges 25 each with a sliding surface 26 which are in surface engagement with the sliding blocks 24.
  • the sliding blocks are cuboid, in particular square in cross-section and rotatably mounted in the side walls 8.
  • a pivoting device 30 can then pivot the scraper blade 10 about the pivot axis 18, wherein the pivoting device 30 is hinged to the upper end 16 of the upper part 14 with an actuator 34 consisting of a piston-cylinder unit.
  • the actuator 34 is on the machine side to a stationary part 32, e.g. hinged to the roller box 7 and extends substantially horizontally up to a hinge 36 at the upper end 16 of the upper part 14 of the scraper blade 10 so that the scraper blade 10 when applying a compressive force by the actuator 34 can be pivoted upwards by at least 90 ° ,
  • the scraper blade 10 Since the lower part 12 of the scraper blade 10 is fully raised, the scraper blade 10 has approximately only half the height, so that the pivot radius of the scraper blade 10 is reduced and at the same time a large swivel angle is made possible.
  • the lower part 12 can be moved downwards, so that the lower part 12 can thread in front of the sliding blocks 24 in the direction of travel.
  • the threading is facilitated by the fact that the vertically extending sliding surfaces 26 are bevelled or rounded at the lower edges 27 to the scraper blade 10 and in that the sliding blocks 24 are rotatably mounted.
  • the sliding surfaces 26 may also be slightly tapered tapering down to also facilitate threading.
  • the rotatable sliding block 24 with a square cross-section allows a flat contact with the sliding surface 26, so that less wear due to the surface contact occurs.
  • the sliding blocks 24 act as locking means when the scraper blade 10 is in the operating position.
  • the actuator 34 engages the upper part 14 of the scraper blade 10 below the pivot axis 18 of the scraper blade 10 on the hinge 36 at. It is understood that two actuators 34 with two joints 36, which form a second pivot axis, may be provided.
  • the pivot axis 18 is therefore arranged vertically higher relative to the hinge 36 and horizontally offset relative to the direction of travel to the rear. In this way, only a small height is required for the pivoting device 30, wherein due to the low point of attack of the actuator 34, the entire pivoting device 30 does not project vertically upwards relative to the upper part 14 of the scraper blade 10.
  • the hinge 36 of the scraper blade 10 is preferably arranged in the plane of the upper part 14 of the scraper blade 10 or at a small distance from this plane.
  • holding devices 20 consist of locking bolts 38 provided on both sides on the upper part 14 of the scraper blade 10 at the lower end of the upper part 14, which are mounted vertically movably in the upper part 14 of the scraper blade 10.
  • the locking bolts 38 engage in corresponding bayonet-like recesses 40 in the side walls 8 a.
  • the drivers 41 on the lower part 12 of the scraper blade 10 consist of orthogonally projecting from the lower part 12 round bolt, which extend substantially horizontally.
  • the locking bolts 38 are guided between vertical guide walls 48 which project orthogonally from the upper part 14 of the scraper blade 10, such that the locking bolts 38 can not tilt.
  • the upper part 14 of the scraper blade 10 may moreover have a flap 50 which can be opened in the operating position of the scraper blade 10 in order to be able to deposit part of the material excavation in the scraper track if necessary.
  • the lifting device 22 engages in both embodiments, on the one hand at the upper end 16 of the upper part 14 of the scraper blade 10 and on the other hand at the lower end 17 of the lower part 12 of the scraper blade 10.
  • the scraper blade 10 is substantially orthogonal to the bottom surface 9, that is inclined vertically or slightly up to about 15 ° to the milling drum 6, as from Fig. 1 seen.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Road Repair (AREA)
  • Shovels (AREA)
  • Soil Working Implements (AREA)

Abstract

The scraper device has scraper blade engaged with lateral retaining devices (20) at lateral walls (8) when in operating position. The scraper blade (10) is retained in position running essentially orthogonal to ground surface. The swiveling device (30) swivels scraper blade about swiveling axis (18) when scraper blade is disengaged from lateral retaining devices. The swiveling device is provided at upper end of upper part of scraper blade with operating device (34) that is articulated between permanently installed part of construction machine and scraper blade upper part (14).

Description

Die Erfindung betrifft eine Abstreifeinrichtung nach dem Oberbegriff des Anspruchs 1, sowie eine Baumaschine nach dem Oberbegriff des Anspruchs 15.The invention relates to a stripping device according to the preamble of claim 1, as well as a construction machine according to the preamble of claim 15.

Eine Abstreifeinrichtung für eine in einer Baumaschine an einem Maschinenrahmen in Seitenwänden gelagerten Fräswalze mit einem in Fahrtrichtung hinter der Fräswalze höhenverstellbar angeordneten Abstreifschild ist aus der DE 10 2005 058 102 bekannt. Bei dieser Abstreifeinrichtung kann der untere Teil des Abstreifschildes über die von der Fräswalze abgefräste Bodenoberfläche gleiten, wobei das Abstreifschild relativ zu der Fräswalze höhenverstellbar geführt ist.A stripping device for a milling machine mounted in a construction machine on a machine frame in side walls with a height-adjustable behind the milling drum in the direction of travel scraper blade is from the DE 10 2005 058 102 known. In this scraper, the lower part of the scraper blade can slide over the milled by the milling drum bottom surface, the scraper blade is guided adjustable in height relative to the milling drum.

Aus der DE 35 28 038 ist es bei einer Abstreifeinrichtung mit einem einteiligen Abstreifschild bekannt, ein verschwenkbares Abstreifschild zu verwenden. Eine seitlich angeordnete Haltenut bewirkt, dass aus der Hubbewegung des Abstreifschildes zum Ende des Weges eines Hubzylinders eine Schwenkbewegung wird.From the DE 35 28 038 it is known in a scraper with a one-piece scraper blade to use a pivotable scraper blade. A laterally arranged retaining groove causes a pivoting movement from the lifting movement of the scraper blade to the end of the stroke of a lifting cylinder.

Aus der US 5,505,598 und der US 5,474,397 ist es ebenfalls bekannt, den Hubzylinder für die Schwenkbewegung zu verwenden, allerdings ist es dafür erforderlich, manuell Bolzen zur Entriegelung zu entfernen.From the US 5,505,598 and the US 5,474,397 It is also known to use the lifting cylinder for the pivoting movement, however, it is necessary to manually remove bolts for unlocking.

Bei den einteiligen Abstreifeinrichtungen gemäß dem eingangs genannten Stand der Technik wird der Zugang zur Walze durch einen großen Hub des Abstreifschildes ohne ein Verschwenken erzielt.In the one-piece stripping devices according to the aforementioned prior art access to the roller is achieved by a large stroke of the scraper blade without pivoting.

Zusammengefasst hat der bekannte Stand der Technik folgende Nachteile:

  • Hubzylinder, die gleichzeitig für das Heben und auch für das Verschwenkens ausgelegt sind, haben eine zu große Bauhöhe,
  • der Schwenkradius ist bei diesen Lösungen größer, wodurch die hinteren Fahrwerke weit nach hinten angeordnet werden müssen,
  • das manuelle Entfernen der Bolzen ist zeitraubend und kraftaufwändig,
  • wenn einer der Bolzen sich verklemmt, muss er manuell aufwändig mit einem Werkzeug entfernt werden,
  • die Verwendung von Bolzen hat den Nachteil einer geringen Kontaktfläche, mit der Folge einer hohen Flächenpressung und eines hohen Verschleißes,
  • der erreichbare Schwenkwinkel ist zu klein,
  • die Bauhöhe von einteiligen Abstreifeinrichtungen ist so groß, dass sie sich nur dort eignet, wo die Fräswalze am hinteren Ende der Baumaschine angeordnet ist und nicht zwischen der Vorder- und Hinterachse unterhalb des Maschinenrahmens.
In summary, the known prior art has the following disadvantages:
  • Lifting cylinders, which are designed for lifting and also for pivoting, have too high a height,
  • The swing radius is greater in these solutions, making the rear bogies have to be located far to the rear,
  • manual removal of the bolts is time consuming and requires a lot of effort
  • if one of the bolts jams, it must be manually laboriously removed with a tool,
  • the use of bolts has the disadvantage of a small contact surface, with the result of high surface pressure and high wear,
  • the achievable swivel angle is too small
  • the height of one-piece scrapers is so great that it is only suitable where the milling drum is located at the rear end of the construction machine and not between the front and rear axles below the machine frame.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Abstreifeinrichtung sowie eine selbstfahrende Baumaschine, insbesondere Straßenfräsmaschine zu schaffen, deren Abstreifschild mit einem großen Schwenkwinkel bei einem geringen Schwenkradius schwenkbar ist, die eine geringe Bauhöhe realisiert und keine manuelle Betätigung erfordert.The invention is therefore an object of the invention to provide a stripping and a self-propelled construction machine, in particular road milling machine whose scraper blade is pivotable with a large swivel angle at a small swivel radius, which implements a low height and requires no manual operation.

Zur Lösung dieser Aufgabe dienen die Merkmale des Anspruchs 1 bzw. 15.To solve this problem serve the features of claim 1 and 15, respectively.

Die Erfindung sieht in vorteilhafter Weise vor, dass der obere Teil des Abstreifschildes an dem oberen Ende gelenkig um eine zu der Fräswalzenachse parallele Schwenkachse schwenkbar befestigt ist, dass das Abstreifschild in Betriebsstellung mit seitlichen Halteeinrichtungen in den Seitenwänden im Eingriff ist, die das Abstreifschild in einer im wesentlichen orthogonal zur Bodenoberfläche verlaufenden Position halten, dass eine Schwenkeinrichtung das Abstreifschild um die Schwenkachse verschwenken kann, wenn das Abstreifschild außer Eingriff mit den seitlichen Halteeinrichtungen ist, und dass die Schwenkeinrichtung an dem oberen Ende des oberen Abstreifschildes eine zwischen einem ortsfesten Teil der Baumaschine und dem oberem Teil des Abstreifschildes angelenkte Betätigungseinrichtung aufweist.The invention provides advantageously that the upper part of the scraper blade is pivotally mounted at the upper end about a parallel to the Fräswalzenachse pivot axis, that the scraper blade is in the operating position with lateral holding means in the side walls in engagement with the scraper blade in a hold substantially orthogonal to the bottom surface extending position that a pivoting device to the scraper blade the pivot axis can pivot when the scraper blade is out of engagement with the lateral support means, and that the pivot means at the upper end of the upper scraper blade has an articulated between a fixed part of the construction machine and the upper part of the scraper blade actuator.

Die Erfindung sieht somit vor, dass die Schwenkeinrichtung eine Betätigungseinrichtung aufweist, die an dem oberen Ende des oberen Abstreifschildes zwischen einem ortfesten Teil der Baumaschine und dem oberen Teil des Abstreifschildes platzsparend angelenkt ist. Die Betätigungseinrichtung ist daher unabhängig von Hubzylindern des Abstreifschildes und kann das Abstreifschild um eine erste Schwenkachse verschwenken, wenn das Abstreifschild außer Eingriff mit den seitlichen Halteeinrichtungen ist. Durch die Anordnung der Betätigungseinrichtung ist ein großer Schwenkwinkel möglich, da das Abstreifschild um 90° und mehr verschwenkt werden kann. Gleichzeitig wird ein kleiner Schwenkradius erreicht weil die Hubzylinder und damit auch das Abstreifschild selbst nach Abschluss der eigentlichen Hubbewegung keinen weiteren Hubweg für eine zusätzliche Schwenkbewegung bereithalten müssen. Eine niedrige Bauhöhe der Schwenkeinrichtung wird dadurch realisiert, dass die Betätigungseinrichtung vorzugsweise liegend angeordnet ist. Außerdem erfolgt das Verschwenken des Abstreifschildes vollkommen automatisch, ohne dass eine manuelle Betätigung erforderlich ist.The invention thus provides that the pivoting means comprises an actuating device which is articulated to save space at the upper end of the upper Abstreifschildes between a stationary part of the construction machine and the upper part of the scraper blade. The actuator is therefore independent of lift cylinders of the scraper blade and can pivot the scraper blade about a first pivot axis when the scraper blade is out of engagement with the lateral supports. The arrangement of the actuator, a large swivel angle is possible because the scraper blade can be pivoted by 90 ° and more. At the same time a small swivel radius is achieved because the lifting cylinder and thus the scraper blade even after completion of the actual lifting movement no further stroke for an additional pivotal movement must be prepared. A low overall height of the pivoting device is realized in that the actuating device is preferably arranged horizontally. In addition, the pivoting of the scraper blade is completely automatic, without manual operation is required.

Die Betätigungseinrichtung kann im wesentlich orthogonal zu dem Abstreifschild angeordnet sein. Generell soll die Schwenkeinrichtung die Bauhöhe der Abstreifeinrichtung nicht erhöhen.The actuator may be arranged substantially orthogonal to the scraper blade. In general, the pivot means should not increase the height of the stripping.

Vorzugsweise ist vorgesehen, dass die Halteeinrichtungen und das Abstreifschild parallel zu der Fräswalzenachse angeordnete Verriegelungsmittel aufweisen, die schildseitig an den beiden vertikalen Seitenkanten des Abstreifschildes jeweils mindestens ein erstes Verriegelungsmittel aufweisen, das maschinenseitig mit zweiten, den ersten Verriegelungsmitteln angepassten Verriegelungsmitteln zusammenwirkt, wenn das Abstreifschild sich in Betriebsstellung befindet oder nicht vollständig angehoben ist.Preferably, it is provided that the holding devices and the scraper blade have parallel to the Fräswalzenachse arranged locking means, the shield side at the two vertical side edges of the scraper blade each having at least a first locking means, the machine side with second, the first locking means adapted locking means cooperates when the scraper blade itself is in operating position or not fully raised.

Die Betätigungseinrichtung an dem oberen Teil des Abstreifschildes greift unterhalb der Schwenkachse an einem Gelenk des Abstreifschildes an. Dadurch dass die Betätigungseinrichtung unterhalb der Schwenkachse an dem oberen Teil des Abstreifschildes angreift, kann die Schwenkeinrichtung besonders kompakt ausgeführt werden. Zum Verschwenken drückt die Betätigungseinrichtung gegen das Abstreifschild, so dass dieses um die Schwenkachse verschwenkt werden kann.The actuating device on the upper part of the scraper blade engages below the pivot axis at a joint of the scraper blade. The fact that the actuator engages below the pivot axis at the upper part of the scraper blade, the pivoting device can be made very compact. To pivot the actuator presses against the scraper blade, so that it can be pivoted about the pivot axis.

Es kann vorgesehen sein, dass die Schwenkachse des Abstreifschildes einen vertikalen und horizontalen Abstand zu dem gemeinsamen Gelenk des Abstreifschildes und der Betätigungseinrichtung aufweist.It can be provided that the pivot axis of the scraper blade has a vertical and horizontal distance to the common joint of the scraper blade and the actuating device.

Die Schwenkachse ist relativ zum Gelenk des Abstreifschildes vertikal höher und horizontal gegenüber dem Abstreifschild nach hinten versetzt angeordnet, d.h. in die von der Fräswalze wegweisenden Richtung nach hinten versetzt.The pivot axis is vertically higher relative to the hinge of the scraper blade and horizontally offset rearwardly relative to the scraper blade, i. offset in the direction away from the milling drum direction to the rear.

Das maschinenseitige Gelenk der Betätigungseinrichtung ist an dem ortsfesten Teil der Baumaschine ebenfalls unterhalb einer Horizontalebene durch die Schwenkachse angeordnet.The machine-side joint of the actuating device is also arranged on the stationary part of the construction machine below a horizontal plane through the pivot axis.

Das Gelenk des Abstreifschildes ist in der Ebene des oberen Teils des Abstreifschildes oder mit geringem Abstand von dieser Ebene gelagert.The hinge of the scraper blade is mounted in the plane of the upper part of the scraper blade or at a small distance from this plane.

Die vorgenannten Merkmale ermöglichen günstige Hebelverhältnisse und einen geringen Schwenkradius dadurch, dass die beiden Teile des Abstreifschildes vollständig zusammengefahren sind, und dass eine separate Schwenkeinrichtung vorgesehen ist. Außerdem wird ein großer Schwenkwinkel von über 90° bei gleichzeitiger kompakter Bauweise erreicht.The aforementioned features allow favorable leverage and a small pivot radius in that the two parts of the scraper blade are completely moved together, and that a separate pivoting device is provided. In addition, a large swivel angle of over 90 ° is achieved with a compact design.

Die Schwenkachse ist an einem ortsfesten Teil der Baumaschine, insbesondere an dem Maschinenrahmen oder einem die Fräswalze umgebenden an dem Maschinenrahmen befestigten Walzenkasten gelagert.The pivot axis is mounted on a stationary part of the construction machine, in particular on the machine frame or a surrounding the milling drum fixed to the machine frame roller box.

Bei einem Ausführungsbeispiel ist vorgesehen, dass der untere Teil des Abstreifschildes in Betriebsstellung mit seitlichen Halteeinrichtungen im Eingriff ist und dass eine Schwenkeinrichtung das Abstreifschild um die Schwenkachse verschwenken kann, wenn der untere Teil des Abstreifschildes außer Eingriff mit den seitlichen Halteeinrichtungen ist.In one embodiment, it is provided that the lower part of the scraper blade is in the operating position with lateral holding devices in engagement and that a pivoting device pivot the scraper blade about the pivot axis can, when the lower part of the scraper blade is out of engagement with the lateral holding devices.

Es kann des weiteren vorgesehen sein, dass die Halteeinrichtungen maschinenseitig beidseitig des Abstreifschildes jeweils mindestens einen horizontal in Richtung des Abstreifschildes vorstehenden Vorsprung aufweisen, der mit einem vertikal verlaufenden Streifen an der jeweiligen Seitenkante des unteren Teils des Abstreifschildes im Eingriff ist, wenn das Abstreifschild sich in Betriebsstellung befindet oder nicht vollständig angehoben ist.It can further be provided that the holding devices on the machine side on both sides of the scraper blade each have at least one horizontal projection in the direction of the scraper projection which is in engagement with a vertically extending strip on the respective side edge of the lower part of the scraper blade when the scraper blade is in Operating position is or is not fully raised.

Vorzugsweise besteht der Vorsprung aus einem drehbaren Kulissenstein, der um eine parallel zur Fräswalzenachse verlaufende Achse drehbar ist. Der Kulissenstein hat vorzugsweise eine quaderförmige Form mit quadratischem Querschnitt.Preferably, the projection consists of a rotatable sliding block, which is rotatable about an axis parallel to the Fräswalzenachse axis. The sliding block preferably has a rectangular shape with a square cross-section.

Bei einem Ausführungsbeispiel ist vorgesehen, dass der untere Teil des Abstreifers sich in Fahrtrichtung nach hinten gesehen, an den Kulissensteinen abstützt.In one embodiment, it is provided that the lower part of the scraper seen in the direction of travel to the rear, supported on the sliding blocks.

Vorzugsweise ist der untere Teil mit einer Hubeinrichtung gegenüber dem oberen Teil anhebbar ist bis der untere Teil außer Eingriff mit den seitlichen Halteeinrichtungen ist. Zum Verschwenken des Abstreifschildes wird das Unterteil des Abstreifschildes soweit angehoben, bis es über die beidseitig vorgesehenen Kulissensteine hinausgefahren ist. Wird das Abstreifschild wieder in die Betriebsposition zurückgefahren, erfolgen diese Schritte entsprechend in umgekehrter Reihenfolge. Dabei fädelt sich das Unterteil des Abstreifschildes wieder hinter den beidseitigen Kulissensteinen ein. Hierzu sind die Führungen des Abstreifschildes mit Fasen bzw. Rundungen versehen, wobei die Kulissensteine selbst drehbar gelagert sind. Diese Lagerung bewirkt auch eine möglichst großflächige Anlagefläche und damit geringe Flächenpressungen, die zu einem geringen Verschleiß führen.Preferably, the lower part is liftable with a lifting device relative to the upper part until the lower part is out of engagement with the lateral holding means. For pivoting the scraper blade, the lower part of the scraper blade is raised until it is moved beyond the provided on both sides sliding blocks. If the scraper blade is returned to the operating position, these steps are carried out in the reverse order. The lower part of the scraper blade threads itself behind the two-sided sliding blocks. For this purpose, the guides of the scraper blade are provided with chamfers or curves, wherein the sliding blocks themselves are rotatably mounted. This storage also causes the largest possible contact surface and thus low surface pressures that lead to low wear.

An den Seitenkanten des unteren Teils des Abstreifschildes sind vertikal verlaufende Streifen angeordnet, die mit den Kulissensteinen zusammenwirken. Diese Streifen sind an der Unterkante zum Abstreifschild hin abgeschrägt.On the side edges of the lower part of the Abstreifschildes vertically extending strips are arranged, which cooperate with the sliding blocks. These strips are bevelled at the lower edge of the scraper blade.

Nach einer Alternative kann vorgesehen sein, dass die Vorsprünge nach außen automatisch rückziehbar sind, um den unteren Teil des Abstreifschildes freizugeben, wenn der untere Teil des Abstreifschildes ausreichend angehoben ist. Bei dieser Alternative kann es auch vorgesehen sein, dass sich das obere Teil des Abstreifers in Fahrtrichtung nach hinten gesehen an den Kulissensteinen abstützt und nicht der untere Teil.According to an alternative, it may be provided that the protrusions are automatically retractable outwards to release the lower part of the scraper blade, when the lower part of the scraper blade is raised sufficiently. In this alternative, it can also be provided that the upper part of the scraper as seen in the direction of travel is supported on the sliding blocks and not the lower part.

Bei einem weiteren Ausführungsbeispiel ist vorgesehen, dass der obere Teil des Abstreifschildes in Betriebsstellung mit seitlichen Halteeinrichtungen im Eingriff ist, und dass eine Schwenkeinrichtung das Abstreifschild um die Schwenkachse verschwenken kann, wenn der obere Teil des Abstreifschildes außer Eingriff mit den seitlichen Halteeinrichtungen ist.In a further embodiment it is provided that the upper part of the scraper blade in the operating position with lateral holding means is engaged, and that a pivoting device can pivot the scraper blade about the pivot axis when the upper part of the scraper blade is out of engagement with the lateral holding means.

Es kann vorgesehen sein, dass die Verriegelungsmittel entriegelbar sind, um den oberen Teil des Abstreifschildes freizugeben, wenn der untere Teil des Abstreifschildes ausreichend oder vollständig angehoben ist.It can be provided that the locking means are unlocked to release the upper part of the scraper blade when the lower part of the scraper blade is sufficiently or fully raised.

Vorzugsweise ist der untere Teil mit einer Hubeinrichtung gegenüber dem oberen Teil anhebbar, bis der obere Teil außer Eingriff mit den seitlichen Halteeinrichtungen ist.Preferably, the lower part is lifted with a lifting device relative to the upper part until the upper part is out of engagement with the lateral holding devices.

Bei diesem Ausführungsbeispiel kann vorgesehen sein, dass der untere Teil des Abstreifschildes eine Entriegelungseinrichtung aufweist, die beim Anheben des unteren Teils des Abstreifschildes nach einem vorgegebenen Hubweg die Verriegelungsmittel entriegelt, so dass das Abstreifschild aufgrund der Entriegelung verschwenkbar ist.In this embodiment, it may be provided that the lower part of the scraper blade has an unlocking device which unlocks the locking means upon lifting of the lower part of the scraper blade after a predetermined stroke, so that the scraper blade is pivotable due to the unlocking.

Bei einem weiteren Ausführungsbeispiel kann vorgesehen sein, dass die Halteeinrichtungen beidseitig des Abstreifschildes jeweils mindestens einen parallel zu der Fräswalzenachse in Richtung auf die orthogonal zu dem Abstreifschild verlaufenden Seitenwände vorstehenden schildseitigen Vorsprung als erstes Verriegelungsmittel aufweisen, der in eine Aussparung als zweites Verriegelungsmittel in den Seitenwänden eingreift, wenn das Abstreifschild sich in Betriebsstellung befindet oder nicht vollständig angehoben ist.In a further embodiment it can be provided that the holding devices have on both sides of the scraper blade at least one parallel to the Fräswalzenachse in the direction of the orthogonal to the scraper blade extending side walls protruding shield-side projection as a first locking means which engages in a recess as a second locking means in the side walls when the scraper blade is in the operating position or not fully raised.

Der Verriegelungsbolzen kann nach innen rückziehbar sein, um den oberen Teil des Abstreifschildes freizugeben, wenn der untere Teil des Abstreifschildes ausreichend oder vollständig angehoben ist.The locking bolt may be retractable inwardly to release the upper portion of the scraper blade when the lower portion of the scraper blade is sufficiently or fully raised.

Die Erfindung betrifft auch eine Baumaschine, insbesondere eine selbstfahrende Straßenfräsmaschine mit einer Abstreifeinrichtung gemäß den vorgenannten Merkmalen.The invention also relates to a construction machine, in particular a self-propelled road milling machine with a stripping device according to the aforementioned features.

Weitere vorteilhafte Ausführungsbeispiele sind den weiteren Unteransprüchen zu entnehmen.Further advantageous embodiments can be found in the further subclaims.

Die Erfindung betrifft auch eine Baumaschine, insbesondere eine selbstfahrende Straßenfräsmaschine mit der erfindungsgemäßen Abstreifeinrichtung.The invention also relates to a construction machine, in particular a self-propelled road milling machine with the stripping device according to the invention.

Im folgenden wird unter Bezugnahme auf die Zeichnungen Ausführungsbeispiele der Erfindung näher erläutert. Es zeigen:

Fig. 1
Eine selbstfahrende Straßenfräsmaschine mit einer erfindungsgemäßen Abstreifeinrichtung,
Fig. 2
ein erstes Ausführungsbeispiel einer Abstreifeinrichtung im Betriebszustand,
Fig. 3
eine Abstreifeinrichtung gemäß Fig. 2 mit angehobenem unteren Schildteil in entriegelter Position,
Fig. 4
eine Abstreifeinrichtung gemäß Fig. 2 in angehobener und verschwenkter Position,
Fig. 5
ein zweites Ausführungsbeispiel einer Abstreifeinrichtung im Betriebszustand,
Fig. 6
eine Abstreifeinrichtung gemäß Fig. 5 mit angehobenem unteren Schildteil in entriegelter Position, und
Fig. 7
eine Abstreifeinrichtung gemäß Fig. 5 in angehobener und verschwenkter Position.
In the following, embodiments of the invention will be explained in more detail with reference to the drawings. Show it:
Fig. 1
A self-propelled road milling machine with a scraper device according to the invention,
Fig. 2
a first embodiment of a stripping device in the operating state,
Fig. 3
a stripping device according to Fig. 2 with raised lower plate part in unlocked position,
Fig. 4
a stripping device according to Fig. 2 in raised and pivoted position,
Fig. 5
A second embodiment of a stripping device in the operating state,
Fig. 6
a stripping device according to Fig. 5 with raised lower shield part in unlocked position, and
Fig. 7
a stripping device according to Fig. 5 in raised and pivoted position.

Fig. 1 zeigt eine selbstfahrende Straßenfräsmaschine 1 in der Bauform einer Großfräse, bei der eine Fräswalze 6 zwischen vorderen und hinteren Fahrwerken 2,3 mit einer Fräswalzenachse 5 in Seitenwänden 8 des Maschinenrahmens 4 gelagert ist. Fig. 1 shows a self-propelled road milling machine 1 in the design of a large milling machine, in which a milling drum 6 between front and rear suspensions 2,3 is mounted with a Fräswalzenachse 5 in side walls 8 of the machine frame 4.

Die Fräswalze 6 ist von einem an dem Maschinenrahmen 4 befestigten Walzenkasten 7 umgeben, der an dem in Fahrtrichtung hinteren Ende eine Abstreifeinrichtung mit einem zweiteiligen Abstreifschild 10 aufweist. Der untere Teil 12 des Abstreifschildes 10 kann im Betrieb über die von der Fräswalze 6 abgefräste Bodenoberfläche 9 gleiten, wobei der untere Teil 12 des Abstreifschildes 10 relativ zu der Fräswalze 6 höhenverstellbar ist.The milling drum 6 is surrounded by a roller box 7 fixed to the machine frame 4, which has a stripping device with a two-part scraper blade 10 at the rear end in the direction of travel. The lower part 12 of the scraper blade 10 can slide during operation on the milled from the milling drum 6 bottom surface 9, wherein the lower part 12 of the scraper blade 10 is adjustable in height relative to the milling drum 6.

Die Abstreifeinrichtung mit einem zweiteiligen Abstreifschild 10 ist selbstverständlich auch bei anderen Straßenfräsmaschinen anderer Bauform einsetzbar.The stripping device with a two-part scraper blade 10 can of course also be used in other road milling machines of a different design.

Neben den Seitenwänden 8 kann zusätzlich ein höhenverstellbares Seitenschild 11 als Kantenschutz für die Fräskante vorgesehen sein.In addition to the side walls 8, a height-adjustable side plate 11 may additionally be provided as edge protection for the milling edge.

Fig.2 zeigt ein erstes Ausführungsbeispiel einer Abstreifeinrichtung mit einem zweiteiligen Abstreifschild 10, bei dem der obere Teil 14 des Abstreifschildes 10 an dem oberen Ende 16 gelenkig um eine zu der Fräswalzenachse 5 parallele Schwenkachse 18 schwenkbar befestigt ist. Fig.2 shows a first embodiment of a scraper with a two-part scraper blade 10, in which the upper part 14 of the scraper blade 10 is pivotally mounted at the upper end 16 pivotally about an axis parallel to the Fräswalzenachse 5 pivot axis 18.

Das Abstreifschild 10 ist in Betriebsstellung mit seitlichen Halteeinrichtungen 20 in den Seitenwänden 8 im Eingriff, die das Abstreifschild 10 in einer im wesentlichen orthogonal zur Bodenoberfläche 9 verlaufenden Position halten. In dem Ausführungsbeispiel der Fig. 1 ist dabei der untere Teil 12 des Abstreifschildes 10 im Eingriff mit Kulissensteinen 24, die beidseitig des unteren Teils 12 des Abstreifschildes 10 in den Seitenwänden 8 drehbar gelagert sind.The scraper blade 10 is in the operative position with lateral support means 20 in the side walls 8 in engagement, which hold the scraper blade 10 in a substantially orthogonal to the bottom surface 9 extending position. In the embodiment of Fig. 1 is the lower part 12 of the scraper blade 10 in engagement with sliding blocks 24 which are rotatably supported on both sides of the lower part 12 of the scraper blade 10 in the side walls 8.

Der untere Teil 12 ist an seinen vertikalen Seitenkanten 25 jeweils mit einer Gleitfläche 26 versehen, die mit den Kulissensteinen 24 flächig im Eingriff sind.The lower part 12 is provided at its vertical side edges 25 each with a sliding surface 26 which are in surface engagement with the sliding blocks 24.

Hierzu sind die Kulissensteine quaderförmig, insbesondere im Querschnitt quadratisch gestaltet und drehbar in den Seitenwänden 8 gelagert.For this purpose, the sliding blocks are cuboid, in particular square in cross-section and rotatably mounted in the side walls 8.

Wird der untere Teil 12 des Abstreifschildes 10 mit Hilfe der Hubeinrichtung 22 gegenüber dem oberen Teil 14 angehoben, gerät der untere Teil 12 in der obersten Position außer Eingriff mit den Kulissensteinen 24, so dass das Abstreifschild 10 insgesamt zum Verschwenken freigegeben ist.If the lower part 12 of the scraper blade 10 is lifted by means of the lifting device 22 relative to the upper part 14, the lower part 12 in the uppermost position gets out of engagement with the sliding blocks 24, so that the scraper blade 10 is released altogether for pivoting.

Eine Schwenkeinrichtung 30 kann dann das Abstreifschild 10 um die Schwenkachse 18 verschwenken, wobei die Schwenkeinrichtung 30 an dem oberen Ende 16 des oberen Teils 14 mit einer aus einer Kolben-Zylindereinheit bestehenden Betätigungseinrichtung 34 angelenkt ist. Die Betätigungseinrichtung 34 ist maschinenseitig an einem ortsfesten Teil 32, z.B. an dem Walzenkasten 7 angelenkt und erstreckt sich im wesentlichen horizontal bis zu einem Gelenk 36 am oberen Ende 16 des oberen Teils 14 des Abstreifschildes 10, so dass das Abstreifschild 10 beim Aufbringen einer Druckkraft durch die Betätigungseinrichtung 34 nach oben um mindestens 90° verschwenkt werden kann.A pivoting device 30 can then pivot the scraper blade 10 about the pivot axis 18, wherein the pivoting device 30 is hinged to the upper end 16 of the upper part 14 with an actuator 34 consisting of a piston-cylinder unit. The actuator 34 is on the machine side to a stationary part 32, e.g. hinged to the roller box 7 and extends substantially horizontally up to a hinge 36 at the upper end 16 of the upper part 14 of the scraper blade 10 so that the scraper blade 10 when applying a compressive force by the actuator 34 can be pivoted upwards by at least 90 ° ,

Da der untere Teil 12 des Abstreifschildes 10 vollständig hochgefahren ist, weist das Abstreifschild 10 etwa nur die halbe Höhe auf, so dass der Schwenkradius des Abstreifschildes 10 reduziert ist und gleichzeitig ein großer Schwenkwinkel ermöglicht wird.Since the lower part 12 of the scraper blade 10 is fully raised, the scraper blade 10 has approximately only half the height, so that the pivot radius of the scraper blade 10 is reduced and at the same time a large swivel angle is made possible.

Wird das Abstreifschild 10 wieder in die Betriebsstellung zurückgeschwenkt, kann der untere Teil 12 nach unten bewegt werden, so dass sich der untere Teil 12 in Fahrtrichtung vor den Kulissensteinen 24 einfädeln kann. Das Einfädeln wird dadurch erleichtert, dass die vertikal verlaufenden Gleitflächen 26 an den Unterkanten 27 zum Abstreifschild 10 hin abgeschrägt oder abgerundet sind und dadurch, dass die Kulissensteine 24 drehbar gelagert sind. Die Gleitflächen 26 können auch leicht konisch sich nach unten verjüngend verlaufen, um ebenfalls das Einfädeln zu erleichtern.If the scraper blade 10 is pivoted back into the operating position, the lower part 12 can be moved downwards, so that the lower part 12 can thread in front of the sliding blocks 24 in the direction of travel. The threading is facilitated by the fact that the vertically extending sliding surfaces 26 are bevelled or rounded at the lower edges 27 to the scraper blade 10 and in that the sliding blocks 24 are rotatably mounted. The sliding surfaces 26 may also be slightly tapered tapering down to also facilitate threading.

Der drehbare Kulissenstein 24 mit einem quadratischen Querschnitt erlaubt einen flächigen Kontakt mit der Gleitfläche 26, so dass ein geringerer Verschleiß aufgrund der flächigen Berührung erfolgt.The rotatable sliding block 24 with a square cross-section allows a flat contact with the sliding surface 26, so that less wear due to the surface contact occurs.

Die Kulissensteine 24 wirken als Verriegelungsmittel, wenn das Abstreifschild 10 sich in Betriebsstellung befindet.The sliding blocks 24 act as locking means when the scraper blade 10 is in the operating position.

Vorzugsweise greift die Betätigungseinrichtung 34 an dem oberen Teil 14 des Abstreifschildes 10 unterhalb der Schwenkachse 18 des Abstreifschildes 10 an dem Gelenk 36 an. Es versteht sich, dass auch zwei Betätigungseinrichtungen 34 mit zwei Gelenken 36, die eine zweite Schwenkachse bilden, vorgesehen sein können.Preferably, the actuator 34 engages the upper part 14 of the scraper blade 10 below the pivot axis 18 of the scraper blade 10 on the hinge 36 at. It is understood that two actuators 34 with two joints 36, which form a second pivot axis, may be provided.

Die Schwenkachse 18 ist daher relativ zu dem Gelenk 36 vertikal höher und horizontal relativ zur Fahrtrichtung nach hinten versetzt angeordnet. Auf diese Weise wird für die Schwenkeinrichtung 30 nur eine geringe Bauhöhe benötigt, wobei aufgrund des tiefen Angriffspunktes der Betätigungseinrichtung 34 die gesamte Schwenkeinrichtung 30 nicht vertikal nach oben gegenüber dem oberen Teil 14 des Abstreifschildes 10 übersteht.The pivot axis 18 is therefore arranged vertically higher relative to the hinge 36 and horizontally offset relative to the direction of travel to the rear. In this way, only a small height is required for the pivoting device 30, wherein due to the low point of attack of the actuator 34, the entire pivoting device 30 does not project vertically upwards relative to the upper part 14 of the scraper blade 10.

Das Gelenk 36 des Abstreifschildes 10 ist bevorzugt in der Ebene des oberen Teils 14 des Abstreifschildes 10 oder mit geringem Abstand von dieser Ebene angeordnet.The hinge 36 of the scraper blade 10 is preferably arranged in the plane of the upper part 14 of the scraper blade 10 or at a small distance from this plane.

Bei den Ausführungsbeispielen der Fign. 5 bis 7 ist die Anordnung der Schwenkeinrichtung 30 und der Schwenkachse 18, sowie der Hubeinrichtung 22 im wesentlichen die gleiche, wie bei den Ausführungsbeispielen der Fign. 2 bis 4.In the embodiments of the FIGS. 5 to 7 the arrangement of the pivoting device 30 and the pivot axis 18, and the lifting device 22 is substantially the same as in the embodiments of FIGS. 2 to 4 ,

Unterschiedlich ist daher im wesentlichen die Ausgestaltung der Halteeinrichtungen 20. Diese Halteeinrichtungen bestehen aus beidseitig an dem oberen Teil 14 des Abstreifschildes 10 am unteren Ende des oberen Teils 14 vorgesehenen Verriegelungsbolzen 38, der vertikal beweglich in dem oberen Teil 14 des Abstreifschildes 10 gelagert sind. Die Verriegelungsbolzen 38 greifen in entsprechende bajonettartige Aussparungen 40 in den Seitenwänden 8 ein.Therefore, the design of the holding devices 20 is essentially different. These holding devices consist of locking bolts 38 provided on both sides on the upper part 14 of the scraper blade 10 at the lower end of the upper part 14, which are mounted vertically movably in the upper part 14 of the scraper blade 10. The locking bolts 38 engage in corresponding bayonet-like recesses 40 in the side walls 8 a.

An dem unteren Teil 12 des Abstreifschildes 10 befestigte Mitnehmer 41 heben die Verriegelungsbolzen 38 an, wenn sich der untere Teil 12 des Abstreifschildes 10 in seiner angehobenen Position befindet. Durch das Anheben der Verriegelungsbolzen 38 werden diese aus dem verriegelnden Teil der Aussparung 40 herausgehoben, so dass die Betätigungseinrichtung 34 der Schwenkeinrichtung 30 das Abstreifschild 10 um 90° bzw. mehr als 90° verschwenken kann.At the lower part 12 of the scraper blade 10 fixed driver 41 lift the locking bolt 38 when the lower part 12 of the scraper blade 10 is in its raised position. By raising the locking bolts 38, they are lifted out of the locking part of the recess 40, so that the actuator 34 of the pivoting device 30 can pivot the scraper blade 10 by 90 ° or more than 90 °.

Die Mitnehmer 41 an dem unteren Teil 12 des Abstreifschildes 10 bestehen aus orthogonal von dem unteren Teil 12 abstehenden Rundbolzen, die im wesentlichen horizontal verlaufen. Die in einer Führung des oberen Teils 14 des Abstreifschildes gelagerten Verriegelungsbolzen 38, die vertikal beweglich gehalten sind, weisen in ihren parallel zum Abstreifschild 10 verlaufenden Führungsblechen 46 nach unten offene Aussparungen 44 auf, in die die Mitnehmer 41 eingreifen können, um die Verriegelungsbolzen 38 anzuheben und zu entriegeln.The drivers 41 on the lower part 12 of the scraper blade 10 consist of orthogonally projecting from the lower part 12 round bolt, which extend substantially horizontally. The mounted in a guide of the upper part 14 of the scraper bar locking bolts 38 which are held vertically movable, have in their parallel to the scraper blade 10 extending guide plates 46 downwardly open recesses 44, in which the driver 41 can engage to lift the locking bolt 38 and unlock.

Die Verriegelungsbolzen 38 sind zwischen vertikalen Führungswänden 48, die orthogonal von dem oberen Teil 14 des Abstreifschildes 10 abstehen, derart geführt, dass die Verriegelungsbolzen 38 nicht verkanten können.The locking bolts 38 are guided between vertical guide walls 48 which project orthogonally from the upper part 14 of the scraper blade 10, such that the locking bolts 38 can not tilt.

Der obere Teil 14 des Abstreifschildes 10 kann darüber hinaus eine Klappe 50 aufweisen, die in der Betriebsstellung des Abstreifschildes 10 geöffnet werden kann, um bei Bedarf einen Teil des Materialaushubes in der Frässpur ablegen zu können.The upper part 14 of the scraper blade 10 may moreover have a flap 50 which can be opened in the operating position of the scraper blade 10 in order to be able to deposit part of the material excavation in the scraper track if necessary.

Die Hubeinrichtung 22 greift bei beiden Ausführungsbeispielen einerseits am oberen Ende 16 des oberen Teils 14 des Abstreifschildes 10 und andererseits an dem unteren Ende 17 des unteren Teils 12 des Abstreifschildes 10 an.The lifting device 22 engages in both embodiments, on the one hand at the upper end 16 of the upper part 14 of the scraper blade 10 and on the other hand at the lower end 17 of the lower part 12 of the scraper blade 10.

Bei beiden Ausführungsbeispielen verläuft das Abstreifschild 10 im wesentlichen orthogonal zu der Bodenoberfläche 9, d.h. vertikal oder geringfügig bis zu ca. 15° zur Fräswalze 6 hin geneigt, wie aus Fig. 1 ersichtlich.In both embodiments, the scraper blade 10 is substantially orthogonal to the bottom surface 9, that is inclined vertically or slightly up to about 15 ° to the milling drum 6, as from Fig. 1 seen.

Claims (15)

Abstreifeinrichtung für eine in einer Baumaschine an einem Maschinenrahmen (4) zwischen Seitenwänden (8) mit einer Fräswalzenachse (5) gelagerten Fräswalze (6) mit einem in Fahrtrichtung hinter der Fräswalze (6) höhenverstellbar angeordneten Abstreifschild (10), dessen unterer Teil (12) über die von der Fräswalze (6) abgefräste Bodenoberfläche (9) gleiten kann,
dadurch gekennzeichnet,dass
dass das Abstreifschild (10) aus einem oberen Teil (14) und einem unteren Teil (12) besteht, wobei der untere Teil (12) des Abstreifschildes (10) höhenverstellbar ist,
dass der obere Teil (14) des Abstreifschildes (10) an dem oberen Ende (16) um eine zu der Fräswalzenachse (5) parallele Schwenkachse (18) schwenkbar befestigt ist,
dass das Abstreifschild (10) in Betriebsstellung mit seitlichen Halteeinrichtungen (20) an den Seitenwänden (8) im Eingriff ist, die das Abstreifschild (10) in einer im wesentlichen orthogonal zur Bodenoberfläche (9) verlaufenden Position halten,
dass eine Schwenkeinrichtung (30) das Abstreifschild (10) um die Schwenkachse (18) verschwenken kann, wenn das Abstreifschild (10) außer Eingriff mit den seitlichen Halteeinrichtungen (20) ist, und
dass die Schwenkeinrichtung (30) an dem oberen Ende (16) des oberen Teils (14) des Abstreifschildes (10) eine zwischen einem ortsfesten Teil (32) der Baumaschine (1) und dem oberem Teil (14) des Abstreifschildes (10) angelenkte Betätigungseinrichtung (34) aufweist.Stripping device for a in a construction machine on a machine frame (4) between side walls (8) with a Fräswalzenachse (5) mounted milling drum (6) in the direction of travel behind the milling drum (6) height-adjustable arranged scraper blade (10) whose lower part (12 ) can slide over the ground surface (9) milled off from the milling drum (6),
characterized in that
that the scraper blade (10) consists of an upper part (14) and a lower part (12), wherein the lower part (12) of the scraper blade (10) is height-adjustable,
in that the upper part (14) of the scraper blade (10) is pivotally attached to the upper end (16) about a pivot axis (18) parallel to the milling drum axis (5),
in that the scraper blade (10) in operating position is engaged with lateral retaining means (20) on the side walls (8) which hold the scraper blade (10) in a position substantially orthogonal to the ground surface (9),
that a pivoting device (30) can pivot the scraper blade (10) about the pivot axis (18) when the scraper blade (10) is out of engagement with the lateral retaining means (20), and
in that the pivoting device (30) at the upper end (16) of the upper part (14) of the scraper blade (10) articulates between a fixed part (32) of the construction machine (1) and the upper part (14) of the scraper blade (10) Actuating device (34). Abstreifeinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Halteeinrichtungen (20) und das Abstreifschild (10) parallel zu der Fräswalzenachse (5) angeordnete Verriegelungsmittel aufweisen, die schildseitig an den beiden vertikalen Seitenkanten (25) des Abstreifschildes (10) jeweils mindestens ein erstes Verriegelungsmittel aufweisen, das maschinenseitig mit den ersten Verriegelungsmitteln angepassten zweiten Verriegelungsmitteln zusammenwirkt, wenn sich das Abstreifschild (10) in Betriebsstellung befindet.Stripping device according to claim 1, characterized in that the holding means (20) and the scraper blade (10) parallel to the Fräswalzenachse (5) arranged locking means, the shield side on the two vertical side edges (25) of the scraper blade (10) each have at least a first locking means which cooperates on the machine side with the first locking means adapted second locking means when the scraper blade (10) is in the operating position , Abstreifeinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Betätigungseinrichtung (34) an dem oberen Teil (14) des Abstreifschildes (10) unterhalb der Schwenkachse (18) des Abstreifschildes (10) an einem Gelenk (36) angreift.Stripping device according to claim 1 or 2, characterized in that the actuating device (34) on the upper part (14) of the scraper blade (10) below the pivot axis (18) of the scraper blade (10) engages a joint (36). Abstreifeinrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die Schwenkachse (18) des Abstreifschildes (10) einen vertikalen und horizontalen Abstand zu dem gemeinsamen Gelenk (36) des Abstreifschildes (10) und der Betätigungseinrichtung (34) aufweist.Stripping device according to claim 3, characterized in that the pivot axis (18) of the scraper blade (10) has a vertical and horizontal distance to the common joint (36) of the scraper blade (10) and the actuating device (34). Abstreifeinrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass ein maschinenseitiges Gelenk (36) der Betätigungseinrichtung (34) an dem ortsfesten Teil (32) der Baumaschine (1) unterhalb der Schwenkachse (18) angeordnet ist.Stripping device according to one of claims 1 to 4, characterized in that a machine-side joint (36) of the actuating device (34) on the stationary part (32) of the construction machine (1) below the pivot axis (18) is arranged. Abstreifeinrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Schwenkachse (18) an einem ortsfesten Teil (32) der Baumaschine (1), insbesondere an dem Maschinenrahmen (4) oder dem Walzenkasten (7) der Fräswalze (6) gelagert ist.Stripping device according to one of claims 1 to 5, characterized in that the pivot axis (18) on a stationary part (32) of the construction machine (1), in particular on the machine frame (4) or the roller box (7) of the milling drum (6) is. Abstreifeinrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der untere Teil (12) des Abstreifschildes (10) in Betriebsstellung mit seitlichen Halteeinrichtungen (20) im Eingriff ist, und dass eine Schwenkeinrichtung (30) das Abstreifschild (10) um die Schwenkachse (18) verschwenken kann, wenn der untere Teil (12) des Abstreifschildes (10) außer Eingriff mit den seitlichen Halteeinrichtungen (20) ist.Scraper device according to one of claims 1 to 6, characterized in that the lower part (12) of the scraper blade (10) in the operating position with lateral holding means (20) is engaged, and in that a pivoting device (30) the scraper blade (10) around the Swivel axis (18) can pivot when the lower part (12) of the scraper blade (10) is out of engagement with the lateral holding means (20). Abstreifeinrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die Halteeinrichtungen (20) maschinenseitig beidseitig des Abstreifschildes (10) jeweils mindestens einen horizontal in Richtung des Abstreifschildes (10) vorstehenden Vorsprung aufweisen, der mit einer im wesentlichen vertikal verlaufenden Gleitfläche (26) an der jeweiligen Seitenkante (25) des unteren Teils (12) des Abstreifschildes (10) im Eingriff ist, wenn das Abstreifschild (10) sich in Betriebsstellung befindet oder nicht vollständig angehoben ist.Stripping device according to one of claims 1 to 7, characterized in that the holding devices (20) each have on the machine side on both sides of the scraper blade (10) at least one protrusion extending horizontally in the direction of the scraper blade (10), which has a substantially vertically extending sliding surface (26) on the respective side edge (25) of the lower part (10). 12) of the scraper blade (10) is engaged when the scraper blade (10) is in the operating position or is not fully raised. Abstreifeinrichtung nach Anspruch 8, dadurch gekennzeichnet, dass die vertikal verlaufenden Gleitflächen (26) an den Seitenkanten (25) des unteren Teils (12) des Abstreifschildes (10) an der Unterkante (27) zum Abstreifschild (10) hin abgeschrägt ist.Stripping device according to claim 8, characterized in that the vertically extending sliding surfaces (26) at the side edges (25) of the lower part (12) of the scraper blade (10) at the lower edge (27) to the scraper blade (10) is beveled. Abstreifeinrichtung nach einem der Ansprüche 8 oder 9, dadurch gekennzeichnet, dass der Vorsprung nach außen rückziehbar ist, um den unteren Teil (12) des Abstreifschildes (10) freizugeben, wenn der untere Teil (12) des Abstreifschildes (10) ausreichend oder vollständig angehoben ist.Scraper device according to one of claims 8 or 9, characterized in that the projection is retractable outwardly to release the lower part (12) of the scraper blade (10) when the lower part (12) of the scraper blade (10) sufficiently or fully raised is. Abstreifeinrichtung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass der untere Teil (12) mit einer Hubeinrichtung (22) gegenüber dem oberen Teil (14) anhebbar ist, bis der untere Teil (12) außer Eingriff mit den seitlichen Halteeinrichtungen (20) ist.Stripping device according to one of claims 1 to 10, characterized in that the lower part (12) with a lifting device (22) relative to the upper part (14) can be raised until the lower part (12) out of engagement with the lateral holding means (20 ). Abstreifeinrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der obere Teil (14) des Abstreifschildes (10) in Betriebsstellung mit seitlichen Halteeinrichtungen (20) im Eingriff ist, dass die Halteeinrichtungen (20) Verriegelungsmittel (38,40) aufweisen, und dass eine Schwenkeinrichtung (30) das Abstreifschild (10) um die Schwenkachse verschwenken kann, wenn der obere Teil (14) des Abstreifschildes (10) außer Eingriff mit den seitlichen Halteeinrichtungen (20) ist.Stripping device according to one of claims 1 to 6, characterized in that the upper part (14) of the scraper blade (10) in the operating position with lateral holding devices (20) is engaged in that the holding means (20) locking means (38,40), and that a pivot means (30) can pivot the scraper blade (10) about the pivot axis when the upper part (14) of the scraper blade (10) is out of engagement with the lateral retainers (20). Abstreifeinrichtung nach Anspruch 12, dadurch gekennzeichnet, dass der untere Teil des Abstreifschildes (10) eine Entriegelungseinrichtung (41) aufweist, die beim Anheben des unteren Teils (12) des Abstreifschildes (10) nach einem vorgegebenen Hubweg die Verriegelungsmittel (38,40) entriegelt, so dass das Abstreifschild (10) aufgrund der Entriegelung verschwenkbar ist.Scraper device according to claim 12, characterized in that the lower part of the scraper blade (10) has an unlocking device (41) which upon lifting of the lower part (12) of the scraper blade (10) after a predetermined stroke, the locking means (38,40) unlocked, so that the scraper blade (10) is pivotable due to the unlocking. Abstreifeinrichtung nach Ansprüche 12 oder 13, dadurch gekennzeichnet, dass die Halteeinrichtungen (20) beidseitig des Abstreifschildes (10) jeweils mindestens einen parallel zu der Fräswalzenachse (5) in Richtung auf die orthogonal zu dem Abstreifschild (10) verlaufenden Seitenwände (8) vorstehenden schildseitigen Verriegelungsbolzen (38) als erstes Verriegelungsmittel aufweisen, der in eine Aussparung (40) als zweites Verriegelungsmittel in den Seitenwänden (8) eingreift, wenn das Abstreifschild (10) sich in Betriebsstellung befindet oder nicht vollständig angehoben ist.Scraper device according to claims 12 or 13, characterized in that the holding means (20) on both sides of the scraper blade (10) each at least one parallel to the Fräswalzenachse (5) in the direction of the orthogonal to the scraper blade (10) extending side walls (8) protruding shield side Locking bolt (38) as a first locking means which engages in a recess (40) as a second locking means in the side walls (8) when the scraper blade (10) is in the operating position or is not fully raised. Baumaschine, insbesondere selbstfahrende Straßenfräsmaschine (1) mit einer Abstreifeinrichtung nach einem der Ansprüche 1 bis 14.Construction machine, in particular self-propelled road milling machine (1) with a stripping device according to one of claims 1 to 14.
EP08159106.7A 2007-08-15 2008-06-26 Construction machine with screed Active EP2025812B1 (en)

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AU2008203250B2 (en) 2011-04-21
DE102007038677B4 (en) 2009-09-17
US8100480B2 (en) 2012-01-24
CN201326149Y (en) 2009-10-14
JP2009046971A (en) 2009-03-05
CN101368362B (en) 2014-04-09
CN101368362A (en) 2009-02-18
EP2025812B1 (en) 2017-05-10
DE102007038677A1 (en) 2009-02-26
US20090044366A1 (en) 2009-02-19
US9644340B1 (en) 2017-05-09
BRPI0803349A2 (en) 2009-04-07
JP4897749B2 (en) 2012-03-14
US20120170978A1 (en) 2012-07-05
EP3231940A1 (en) 2017-10-18
EP2025812A3 (en) 2010-10-27
US20150091364A1 (en) 2015-04-02
BRPI0803349B1 (en) 2018-09-11
AU2008203250A1 (en) 2009-03-05
US10208436B2 (en) 2019-02-19
US20130154340A1 (en) 2013-06-20
US8376469B2 (en) 2013-02-19
US20180073206A1 (en) 2018-03-15
US8899690B2 (en) 2014-12-02
US9551118B2 (en) 2017-01-24
US20170130420A1 (en) 2017-05-11

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