EP2708651A2 - Machine à fraiser la chaussée - Google Patents

Machine à fraiser la chaussée Download PDF

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Publication number
EP2708651A2
EP2708651A2 EP13002816.0A EP13002816A EP2708651A2 EP 2708651 A2 EP2708651 A2 EP 2708651A2 EP 13002816 A EP13002816 A EP 13002816A EP 2708651 A2 EP2708651 A2 EP 2708651A2
Authority
EP
European Patent Office
Prior art keywords
hold
milling drum
machine according
milling machine
milling
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
EP13002816.0A
Other languages
German (de)
English (en)
Other versions
EP2708651A3 (fr
EP2708651B1 (fr
Inventor
Dirk Franzmann
Christian Berning
Herbert Ley
Cyrus Barimani
Günter HÄHN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wirtgen GmbH
Original Assignee
Wirtgen GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wirtgen GmbH filed Critical Wirtgen GmbH
Publication of EP2708651A2 publication Critical patent/EP2708651A2/fr
Publication of EP2708651A3 publication Critical patent/EP2708651A3/fr
Application granted granted Critical
Publication of EP2708651B1 publication Critical patent/EP2708651B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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

Definitions

  • the invention relates to a road milling machine with a machine frame and a milling device for milling material.
  • the known road milling machines have a machine frame, which is supported by a chassis, and a milling device, which has a milling drum for milling material.
  • the rotatable around a transverse to the direction of the milling drum is arranged in a Fräswalzengephaseuse.
  • the known road milling machines have a transport device for conveying the milled material.
  • the transport device is located in the working direction behind the milling drum housing in order to be able to feed the milled material as far as possible without residue from a subsequent truck via the rear of the milling machine.
  • a rear loader road milling machine is for example from the DE 195 47 698 A1 known.
  • the road surface can be precisely contoured and just milled.
  • the so-called stabilizers or recyclers are distinguished, whose task is to produce by the addition of binders from a non-sustainable surface, such as a loose ground (stabilizer) or a damaged roadway (recycler), a load-bearing substructure.
  • the milling drum housing should prevent the milled material from being ejected.
  • the risk of ejection of milled material exists in particular in the working direction of the milling machine when the milling drum rotates counter to the working direction.
  • the Fräswalzengephaseuse should also ensure a continuous supply of the material to be milled to the transport device.
  • the DE 10 2008 024 651 A1 describes a rear-loading road milling machine, the milling drum is arranged in a Fräswalzengephaseuse, which surrounds the milling drum.
  • a so-called hold-down which is mounted vertically adjustable on a circular axis of rotation of the milling drum concentrically enclosing circular path.
  • it is desired that the gap between the tips of the milling bits of the milling drum and the inside of the blank holder over the circumference of the milling drum has a constant gap width.
  • An independent of the set milling depth of the milling drum uniform gap width should be achieved in that the hold-down runs on a concentric circular path about the axis of rotation of the milling drum.
  • the stripping elements are to be distinguished, which are arranged in the working direction behind the milling drum.
  • stabilizers or recyclers should be subtracted uniformly at a certain height and distributed evenly with the stripping the mix.
  • the invention is based on the object to provide a road milling machine with improved material transport of the milled material within the Fräswalzengephaseuses.
  • the Fräswalzengepuruse the road milling machine according to the invention is a fixed housing which surrounds the milling drum partially.
  • the opening between the milling drum housing and the surface of the material to be scoured, the height of which varies with the set milling depth, can be closed with a hold-down device.
  • the hold-down device is designed such that the distance between the hold-down device and the milling drum housing in the predetermined direction of rotation of the milling drum at least over a portion of the gap increases between the milling drum and hold-down.
  • the distance between the rotation axis and hold-down over the entire circumference of the blank holder increases, so that the gap width increases over the entire length of the gap between the milling drum and hold-down.
  • gap width is understood to mean the distance between the inside of the hold-down device and a cylinder which encloses the tips of the milling tools of the milling drum.
  • the milling drum housing and the hold-down device preferably extend in the axial direction beyond the width of the milling drum.
  • On the sides of the Fräswalzengepuruse is preferably closed by side plates.
  • the formation of the blank holder with increasing gap width leads to improved material transport of the milled material to the transport device. It has been shown that the material flow in particular the distance between the milling drum and hold-down is important because the material is absorbed in the area of the blank holder. A constant distance between the milling roller and hold-down leads to an undesirable compression of the milled material. This material compaction makes material transport over the milling drum to the rear more difficult. In addition, the material compaction requires increased performance of the roller and leads to higher wear. It has also been found that a too large gap, which requires less roller performance and results in less wear, also degrades material handling. The increasing in the direction of rotation of the milling drum gap width, especially in the area of the blank holder improves the Material flow with a relatively low power consumption and a relatively low wear.
  • the packing density of the material may decrease without the risk of the material being compacted or compacted.
  • the milled material is conveyed with increasing speed through the gap, first in the region of the blank holder and later ejected backwards, so that the material can be picked up by the transport device.
  • the relatively small gap width at the bottom leads to the fact that during the milling off sloping floes of material are immediately broken to the desired grain size.
  • a preferred embodiment provides that the hold-down on a rotational axis of the milling drum enclosing guide track between a first position in which the hold-down is lowered, and a second position in which the hold-down is raised, is guided displaceably.
  • the hold-down is adjusted in height.
  • a particularly preferred embodiment provides that the lower edge of the blank holder and the lower edge of the Fräswalzengeophuses are substantially at a height when the hold-down is in the second position. In this position the maximum depth of cut has been reached. But it is also possible that at maximum depth of cut milling drum housing and hold-down partially overlap.
  • a sufficient rigidity of the guide is achieved by extending around the circumference of the hold-down guide elements, which are guided displaceably in the hold-down receiving elements.
  • the hold-down has receiving elements which are guided displaceably in guide elements.
  • the guide elements of the hold-down preferably extend beyond the hold-down, so that the guide elements surround a part of the circumference of the milling drum housing. This ensures that the hold-down can be supported by the guide elements on the Fräswalzengephinuse when the hold-down is in the lowered position. This further improves the rigidity of the guide.
  • two guide or receiving elements are provided, which are arranged on both sides of the Fräswalzengephinuses or hold-down.
  • a crusher element extending in the direction of the axis of rotation of the milling drum is arranged in the gap between the milling drum and the milling drum housing or downholder.
  • the crusher element On the crusher element, any clods of material that are produced during milling can be broken down to the desired particle size.
  • the crusher element extending in the direction of the axis of rotation of the milling drum is only used if the floes have not already broken up during transport through the gap.
  • the opening between the lower edge of the milling drum housing and the surface of the material to be scoured should always be sealed tight, regardless of the milling depth.
  • a tilting of the hold-down can be avoided that at the lower edge of the hold-down a skid is arranged, with which the hold-down rests on the material to be scoured when advancing the machine. With the skate, the hold-down can escape against its pressure force in the guide when hitting an obstacle upwards.
  • a device for raising and lowering the hold-down is provided, so that the movement of the hold-down is supported, in particular from the lowered to the raised position.
  • the device for raising and lowering the sealing element preferably has a measuring unit which is designed in such a way that the measuring unit measures the force acting on an abutment against the sealing element when the blank holder is abutted.
  • the means for raising and lowering comprises a control unit which is designed such that the control unit generates a control signal for lifting the hold-down when the force measured with the measuring unit is greater than a predetermined limit, so that the hold-down is raised, and a control signal for lowering the hold-down is generated when the force is less than the predetermined limit, so that the hold-down is pressed with the predetermined contact force to the ground.
  • the force measured with the measuring unit is preferably the substantially vertical force component acting on the hold-down when striking an obstacle. But it is also possible that the measured force also has a horizontal component.
  • the advantage of the sealing element according to the invention is that obstacles in the working direction of the construction machine can be recognized by the fact that the force acting on the hold-down device exceeds a limit value. If this is the case, the hold-down is raised automatically. The hold-down is raised only until the measured force is below the limit again. In this case, it is assumed that the obstacle has been overcome. The hold-down is then lowered again until the hold-down rests with the predetermined contact force on the floor. The limit value for the measured force should be such that the hold-down is not lifted even with very small obstacles.
  • the means for raising and lowering the hold-down device comprises one or more piston / cylinder arrangements, the cylinder of which articulates with the machine frame and whose pistons articulate with the machine frame Downholder or its cylinder hinged to the hold-down and the piston are pivotally connected to the machine frame.
  • the piston / cylinder arrangement can be operated hydraulically or pneumatically.
  • the height adjustment can also be done by an electric motor.
  • the assemblies required for this purpose belong to the state of the art.
  • Fig. 1 shows in perspective view a road milling machine, which is a rear-loading road milling machine.
  • the road milling machine has a machine frame 1, which is supported by a chassis 2.
  • the chassis 2 has a front wheel 2A in the working direction and two rear wheels 2B in the working direction.
  • the driver's station 3 In the rear area of the machine frame is the driver's station 3.
  • the milling device 4 of the road milling machine is the milling device 4 of the road milling machine.
  • the milling device 4 has a milling drum 5, which is equipped with circumferentially distributed arranged milling chisels 5A.
  • the milling drum 5 is arranged around a transverse axis of rotation of the milling machine 6 in a milling drum housing 7.
  • the milling drum 5 rotates in the milling drum housing 7 in a predetermined direction of rotation D. In the present embodiment, the milling drum 5 rotates counterclockwise.
  • the milling drum housing 5 enclosing the milling drum 7 has an ejection opening on the rear side in the working direction.
  • On the longitudinal sides of the Fräswalzengephinuse is closed by side plates 33.
  • a transport device 9 At the milling drum housing 7 is a transport device 9 with a conveyor belt 10 for conveying the milled material that can be picked up by a truck traveling behind the milling machine.
  • the milling drum housing 7 is fixedly connected to the machine frame 1.
  • the fastening elements for the Fräswalzengepur 7 are not shown in the figures.
  • the milling drum 5 is schematically represented by a cylinder body which encloses the tips of the chisel 5A of the milling drum 5.
  • the milling drum housing 7 extends extending beyond the width of the milling drum 5 on both sides. It surrounds the milling drum 5 except for an opening 11A in the working direction in front of the milling drum and an ejection opening 11 B in the working direction behind the milling drum.
  • the front in the direction of the opening 11 A is closed by a hold-8.
  • the milled material is ejected to the rear and received by the conveyor belt 9 of the transport device 10.
  • a stripping element in the rear region of the milling drum housing 7 is not shown in the figures.
  • FIGS. 2 to 4 show how the milling drum dips in the material to be cut in the vertical direction. While the milling drum is immersed in the material, the hold-down of an in Fig. 2 shown in the first position in which the hold-8 is completely lowered, moved to a second position in which the hold-down is fully raised ( Fig. 4 ). In this position the maximum depth of cut has been reached.
  • Fig. 3 shows a middle position of the blank holder 8 at a lower depth of cut.
  • the front closed Fräswalzengephinuse 7 encloses together with the hold-8, the milling drum 5 over a circumferential angle of about 180 °.
  • FIG. 5 A sectional view show the Figures 5 and 6 , wherein the hold-down 8 in the raised position ( Fig. 5 ) and in the lowered position ( Fig. 6 ) is located.
  • the hold-down 8 closes the working-direction opening 11A between the lower edge 12 of the hold-down 8 and the surface of the road surface 13 to be scoured off.
  • the milling drum 5 surrounding the milling drum 5 over a circumferential angle of more than 90 ° preferably has a spiral contour.
  • the cross-section of the milling drum housing 7 describes a curve which is in the running direction about the axis of rotation 6 of the milling drum 5 away from the axis of rotation, wherein the running direction of the curve corresponds to the direction of rotation of the milling drum 6.
  • the milling drum housing 7 is designed such that the distance between the axis of rotation 6 of the milling drum 5 and the inside of the milling drum housing 7 from the lower edge 27 to the upper edge 14th continuously increases. Consequently, the radius r 1 ⁇ r 2 ⁇ r 3 .
  • the width of the gap between the milling roller body 5 enclosing the tips of the cutting tools and the inside of the milling drum housing 7 increases continuously from the bottom to the top.
  • the increase does not necessarily have to be steady.
  • the only decisive factor is that the gap width increases.
  • the hold-down has a spiral contour.
  • the cross-section of the hold-down describes a curve which extends in the direction of rotation about the axis of rotation 6 of the milling drum 5 from the axis of rotation, wherein the running direction of the curve corresponds to the direction of rotation of the milling drum 6.
  • the hold-down and the lower portion of the Fräswalzengeophuses 7 may have exactly the same curvature.
  • the milling drum housing and hold-down in the raised position can be exactly superimposed.
  • the spiral contour of the Fräswalzengephinuses 7 continues in the hold-8, when the hold-8 is in the lowered position. Then milling drum housing and hold-down in the raised position can not be exactly above each other. In practice, however, will show no significant differences in both embodiments.
  • the preferably over the entire circumference of the Fräswalzengepuruses 7 and the blank holder 8 from bottom to top increasing gap width improves the material flow of the milled material along the gap 15 in particular between the milling drum 5 and hold-8 against the working direction A of the milling machine.
  • the milled material whose packing density decreases in the direction of rotation D of the milling drum 5 and whose volume increases, can be continuously conveyed in the gap 15 with the increasing gap width.
  • the power required for driving the milling drum and the wear of the milling bits are relatively low.
  • Fig. 6 shows the hold-8 in the lowered position, wherein the distance between the inside of the blank holder 8 and the axis of rotation 6 of the milling drum 5 with r 1 ', r 2 ' and r 3 'is designated (r 1 ' ⁇ r 2 ' ⁇ r 3 ').
  • the gap width over the entire circumference of the milling drum can vary between 15 and 80 mm, preferably between 25 and 50 mm. It is not absolutely necessary that the gap width increases continuously over the entire circumference of the milling drum.
  • the gap width in the region of the blank holder 8 is greater than at the lower edge 17 of the Fräswalzengeophuses 7.
  • clods of material removed can still reach the Fräswalzengeophuse, which forms a gap with increasing gap width with the milling drum. Therefore, in the present embodiment, within the gap 15, a breaker element 16 is arranged, which extends in the direction of the axis of rotation 6. With the breaker element 16 coarser material can be broken, which is still in the gap 15.
  • Fig. 8 shows a schematic representation of the leadership of the hold-down 8.
  • the hold-8 has on the outside on both sides of a circumferentially upwardly extending guide rail 15A, 15B.
  • the guide rails 15A and 15B are guided in receiving members 16A and 16B fixed to the machine frame 1.
  • the attachment of the receiving elements is in Fig. 7 not shown.
  • Fig. 7 shows a section through the guide rails 15A, 15B and receiving elements 16A, 16B.
  • the receiving elements 16A, 16B have a U-shaped cross section, in which the guide rails 15A, 15B are guided longitudinally displaceable. Since the receiving elements 16A, 16B engage around the guide rails 15A, 15B, the guide rails are secured in the axial and radial directions. When the hold-down 8 is in the lowered position, the upwardly extending portions of the guide rails 15A, 15B are supported on the milling drum housing 7. As a result, larger forces can be absorbed.
  • the hold-down 8 has a sliding element 18 extending along the lower edge, which may be a slide bar. With the sliding member 18 of the hold-8 slides on the surface of the pavement 13. It lies the Downholder 8 alone due to its weight on the pavement. When the milling drum 5 is immersed in the road surface in the vertical direction, the hold-down 8 slides up in the guide.
  • the hold-down device 7 may also have a skid 22, which is pivotally connected centrally between the guide rails 15A, 15B to the lower end of the sliding element 18.
  • the skid 22 has a curved profile.
  • a means 19 for raising and lowering the hold-7 is provided, which in particular supports the upward movement of the hold-7 in the change of the cutting depth.
  • the device 19 for raising and lowering the hold-down 8 has a piston / cylinder arrangement 20.
  • the piston / cylinder assembly 20 is operated with a hydraulic unit 28 only hinted at, which acts on the cylinder 20A of the piston / cylinder assembly 20 with a hydraulic fluid.
  • the cylinder 20A of the piston / cylinder assembly 20 is pivotally connected to the machine frame 1 and the piston 20B is pivotally connected to the upper end of a U-shaped profile member 22 fixed to the hold-down 8.
  • the hold-down 8 can be raised and lowered.
  • the device 19 for raising and lowering the hold-8 also has a control unit 23 and an evaluation unit 24, which are connected to each other via a data line 25.
  • the means 19 for raising and lowering the hold-8 has a measuring unit 26 for measuring the force acting on the hold-8 when hitting an obstacle force.
  • a measuring unit 26 for measuring the force acting on the hold-8 when hitting an obstacle force.
  • only the horizontal force component of the force acting on the sealing element is measured with the measuring unit.
  • the evaluation unit 30 compares the measured with the measuring unit 26 stop force with a predetermined limit.
  • the control unit 29 When the impact force is greater than the limit value, the control unit 29 generates a control signal for the hydraulic unit 28 for lifting the hold-down 8 so that the hydraulic unit 28 operates the piston 20B of the piston-cylinder unit 20.
  • the hold-down 8 is raised with the piston / cylinder unit 20 until the measured impact force is again smaller than the predetermined limit. If the impact force is smaller than the limit value, the control unit 29 generates a control signal for the hydraulic unit 21, with the piston / cylinder assembly 20 is actuated again to lower the hold-8 until the lower edge 27 of the blank holder 8 again with the predetermined contact force rests on the ground.
  • the piston / cylinder assembly 20 also release the hold-down 8, so that the hold-down falls down due to its weight in the guide.
  • the measuring unit 26 has two sensors 26A, 26B disposed between the receiving members 16A, 16B and the guide rails 15A, 15B in the area where the guide rails extend upwardly beyond the downholder 8.
  • the sensors 26A, 26B are connected to the evaluation unit 30 via signal lines 26A ', 26B'.
  • the evaluation unit 30 evaluates the measurement signals of both sensors. Either only one or the other measuring signal or both measuring signals can be evaluated. For example, an average value of both measurement signals can take place.
  • suitable Pressure measuring sensors and the evaluation of the measuring signals belong to the state of the art.
  • a skid may also be provided on the hold-down device.

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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)
  • Crushing And Grinding (AREA)
EP13002816.0A 2012-06-25 2013-05-31 Machine à fraiser la chaussée Active EP2708651B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012012395.7A DE102012012395A1 (de) 2012-06-25 2012-06-25 Straßenfräsmaschine

Publications (3)

Publication Number Publication Date
EP2708651A2 true EP2708651A2 (fr) 2014-03-19
EP2708651A3 EP2708651A3 (fr) 2015-11-11
EP2708651B1 EP2708651B1 (fr) 2017-03-01

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ID=48576179

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13002816.0A Active EP2708651B1 (fr) 2012-06-25 2013-05-31 Machine à fraiser la chaussée

Country Status (4)

Country Link
US (2) US8939515B2 (fr)
EP (1) EP2708651B1 (fr)
CN (2) CN103510457B (fr)
DE (1) DE102012012395A1 (fr)

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DE102012215013A1 (de) 2012-08-23 2014-02-27 Wirtgen Gmbh Selbstfahrende Fräsmaschine, sowie Verfahren zum Abladen von Fräsgut
DE102014214436A1 (de) 2014-07-23 2016-01-28 Wirtgen Gmbh Bodenbearbeitungsmaschine, sowie Verfahren zum Fräsen von Boden- oder Verkehrsflächen
US20170362783A1 (en) * 2016-06-16 2017-12-21 Asphalt Zipper, Inc. Asphalt milling attachment with adjustable baffle and secure attachment
DE102016014585A1 (de) 2016-12-08 2018-06-14 Wirtgen Gmbh Betätigungseinheit zur Verriegelung eines Bauteils einer Baumaschine und Baumaschine mit einer derartigen Betätigungseinheit
US10584450B2 (en) * 2017-03-23 2020-03-10 Caterpillar Paving Products Inc. Rotary mixer
DE102017012124B4 (de) * 2017-12-29 2023-08-03 Bomag Gmbh Verfahren zur Steuerung der Höhenlage eines Niederhalters einer Bodenfräsmaschine und Bodenfräsmaschine
US10428471B1 (en) * 2018-05-22 2019-10-01 Caterpillar Paving Products Inc. Systems and methods for controlling cold planer material flow
DE102019104218A1 (de) 2019-02-19 2020-08-20 Wirtgen Gmbh Arbeitszug, umfassend eine Bodenbearbeitungsmaschine und ein weiteres Fahrzeug sowie eine automatisierte Abstandsüberwachung
US11072894B2 (en) * 2019-07-16 2021-07-27 Caterpillar Paving Products Inc. Milling assembly material flow control system
CN113494042A (zh) * 2020-03-18 2021-10-12 宋学忠 组合式多铣鼓宽体路面铣刨机
CN114814182B (zh) * 2022-05-18 2024-05-31 江苏徐工工程机械研究院有限公司 铣刨试验装置以及铣刨试验方法
CN115075106B (zh) * 2022-07-19 2022-11-04 徐州徐工筑路机械有限公司 一种沥青路面养护用铣刨机

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DE19547698A1 (de) 1995-12-20 1997-06-26 Wirtgen Gmbh Vorrichtung und Verfahren zum Abfräsen von harten Oberflächen, insbesondere von Straßenbelägen
DE102008024651A1 (de) 2007-10-17 2009-04-23 Dynapac Gmbh Straßenfräse

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US8939515B2 (en) 2015-01-27
CN103510457A (zh) 2014-01-15
EP2708651A3 (fr) 2015-11-11
US20150130257A1 (en) 2015-05-14
DE102012012395A1 (de) 2014-01-02
CN203393585U (zh) 2014-01-15
US20130341997A1 (en) 2013-12-26
US9714488B2 (en) 2017-07-25
EP2708651B1 (fr) 2017-03-01
CN103510457B (zh) 2016-03-16

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