EP1013829A2 - Fräsgerät - Google Patents

Fräsgerät Download PDF

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Publication number
EP1013829A2
EP1013829A2 EP99204507A EP99204507A EP1013829A2 EP 1013829 A2 EP1013829 A2 EP 1013829A2 EP 99204507 A EP99204507 A EP 99204507A EP 99204507 A EP99204507 A EP 99204507A EP 1013829 A2 EP1013829 A2 EP 1013829A2
Authority
EP
European Patent Office
Prior art keywords
milling
hammer
roll
strike
axis
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
EP99204507A
Other languages
English (en)
French (fr)
Other versions
EP1013829B1 (de
EP1013829A3 (de
Inventor
Derk Jan Bleeker
Maurice Sander Carels
Franciscus Hubertus Johannes Mutsaers
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.)
Betonboor Bleeker BV
Original Assignee
Betonboor Bleeker BV
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 Betonboor Bleeker BV filed Critical Betonboor Bleeker BV
Publication of EP1013829A2 publication Critical patent/EP1013829A2/de
Publication of EP1013829A3 publication Critical patent/EP1013829A3/de
Application granted granted Critical
Publication of EP1013829B1 publication Critical patent/EP1013829B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/18—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools
    • B28D1/186—Tools therefor, e.g. having exchangeable cutter bits
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
    • E01C23/08—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

Definitions

  • the invention relates to a milling apparatus, for the milling of hard materials like concrete, rock or asphalt, provided with a milling roll mounted for rotation around a central longitudinal axis, to a surface of which milling roll a number of milling bits are connected, and a hammer axis, mounted for rotation around the central longitudinal axis, for operationally applying additional impulse moments to the milling bits.
  • a milling apparatus of this kind is known from WO 89/01837.
  • the known milling apparatus is used, like the inventive milling apparatus, for example for equalizing a road surface, in which process a partly worn off wearing course is removed.
  • the milling roll is mounted in a wheeled frame with an adjustable height and the frame is provided with a power source for driving the milling roll and for propelling the apparatus.
  • the milling bits mounted on an outer surface of the milling roll are usually welded-on tool holders, in which the actual bits made for example of tungsten carbide are mounted.
  • the present invention is based on the observation that an moment should be preferably directed in the direction of movement of the milling bits.
  • a favourable embodiment according to an aspect of the invention is therefore characterized in that the hammer axis is arranged for applying the additional impulse moments in at least substantially a tangential direction to the milling bits.
  • a favourable embodiment according to another aspect of the invention in which a relatively slow rotating hammer axis may generate an additional impulse moment at a relatively high repetition frequency, is characterized in that an inner wall of the milling roll is provided with strike shoulders and that the hammer axis is provided with hammers, mounted for operationally engaging the strike shoulders.
  • the apparatus is according to another aspect of the invention characterized in that every hammer is pivotally mounted to an arm connected to the hammer axis, such that the hammer can strike a strike shoulder if the hammer is at least substantially in line with the arm.
  • the invention moreover aims at reducing the wear and tear of the bearings of the hammer axis and to increase the control convenience of the milling apparatus by reducing tangential directed vibrations.
  • a favourable embodiment according to another aspect of the invention, which realizes these improvements, is characterized in that the hammers are distributed around the hammer axis to obtain a well-balanced arrangement.
  • a favourable embodiment according to another aspect of the invention which has as an advantage that even with a milling roll with a limited stiffness a good distribution of the additional impulse moments over the milling bits is obtained is characterized in that the hammers are distributed at least substantially regularly spaced along the hammer axis.
  • a very favourable embodiment according to another aspect of the invention is characterized in that a hammer is mounted such that it can strike a plurality of strike shoulders.
  • the strike shoulders run at least substantially regularly spaced along at least substantially the entire length of the inner wall of the milling roll.
  • a further favourable embodiment according to an aspect of the invention is characterized in that the milling roll and the hammer axis each are provided with individual drive means.
  • This embodiment is more expensive than an embodiment in which only the hammer axis is driven but is provides an opportunity to select for a particular material to be milled the rotational speed of the milling roll and the rotational speed of the hammer axis in combination in order to optimize a particular parameter, like the speed of the milling process or the smoothness of the milled surface.
  • a further very favourable embodiment according to an aspect of the invention is characterized in that in an operational mode the hammer axis rotates four to eight times as fast as the milling roll. It is possible then to generate an additional impulse moment with a very high frequency, which greatly enhances the effectiveness of the milling process.
  • a favourable embodiment according to another aspect of the invention is characterized in that coupling means are provided between the drive means and the milling roll, in which at least in a tangential direction some clearance exists.
  • Fig. 1 represents a possible embodiment of a milling apparatus 1, arranged for removing a layer of a road surface 2, consisting of concrete, asphalt or a stone product.
  • Milling apparatus 1 comprises a front wheel 3, enabling the apparatus to be steered with the aid of a steering wheel 4 and two back wheels 5, connected via a transmission 6 to a diesel motor 7 for driving the milling apparatus 1.
  • milling apparatus 1 is provided with a milling roll 8, covered with milling bits and connected via a transmission 9 to diesel engine 7.
  • milling roll 8 comprises a hammer axis 10, provided with hammers, which hammer axis 10 is connected via a transmission 11 to diesel engine 7.
  • Transmissions 6, 9 and 11 comprise multiple v-belts for connecting them to a main axis of diesel motor 7 via variable transmission units, well known in the art, such that the speed of milling apparatus 1, the peripheral velocity of milling roll 8 and the linear speed of hammer axis 10 can be adjusted mutually independent with control devices 12,13,14, dependent upon the operational circumstances, like the desired milling depth, the smoothness of the milled surface and the hardness of the road surface 2. It is also possible to drive a hydraulic pump unit with diesel engine 7 and to provide back wheels 5, milling roll 8 and hammer axis 10 each with a hydraulic motor, in which case the linear speeds can be adjusted independently in a manner well known in the art.
  • Fig. 2 represents a longitudinal cross section of a possible embodiment of a milling roll according to the invention, in which a first pulley 15, driven by transmission 9, drives an inner roll 16.
  • Inner roll 16 and pulley 15 are connected by a hollow axis 17, which hollow axis 17 is supported by two ball bearings 18,19 mounted in a housing 20, which housing 20 in turn is rigidly mounted to the frame of milling apparatus 1.
  • an outer roll on which the milling bits are placed, is placed round inner roll 16 and is fixed to it with bolts.
  • the outer roll is not shown in this figure.
  • a second pulley 21 is provided, driven by transmission 11, for driving a hammer axis 22.
  • Hammer axis 22 is supported by four ball bearings 23,24,25,26, mounted in hollow axis 17 and in inner roll 16.
  • Hammer axis 22 is provided with six arms 27a,..27f, which are distributed regularly spaced along hammer axis 22 and which are each successively rotated over an angle of 60 degrees.
  • six hammers 28a,..,28f are pivotally connected, which can, if they are located in line with the corresponding arms, hit the two strike shoulders 29,30 which are located on an inner wall of inner roll 16, to which they will transfer a tangentially directed impulse.
  • the hammer is slowed down, but the linear speeds of the inner roll and the hammer axis are chosen such that the hammer is again in line with the corresponding arm when it approaches the next strike shoulder.
  • Fig. 3 represents a transverse cross section of a possible embodiment of a milling roll, with an inner roll 16 on an inner wall of which the two strike shoulders 29,30 are connected and with an outer roll 31, the inner roll 16 and the outer roll 31 together forming the milling roll 8.
  • the milling bits used are known in the art and consist of a holder 32, which is welded onto outer roll 31 and a cutter 33 of a cutting metal which is rotatable mounted in holder 32 and which may be provided with a tip 34 made of tungsten carbide. From Fig.
  • Fig. 4 represents a possible distribution of the milling bits on a milling roll 31, which milling roll 31 is showed for clarity in a developed position, in the sense that in an operational position the lines AA' and BB' coincide. It may be noticed that in a direction indicated by an arrow, which is also the direction of propagation, the milling bits are located such that always a limited number of cutting metal cutters 33 are active and will receive the additional impulse moments of the hammers 28a,..,28f, while in a direction perpendicular to the direction of propagation the milling bits are located such that the surface to be milled will be evenly milled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Repair (AREA)
  • Holo Graphy (AREA)
  • Shovels (AREA)
  • Crushing And Grinding (AREA)
  • Earth Drilling (AREA)
EP99204507A 1998-12-27 1999-12-27 Fräsgerät Expired - Lifetime EP1013829B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1010895 1998-12-27
NL1010895A NL1010895C1 (nl) 1998-12-27 1998-12-27 Freesinrichting.

Publications (3)

Publication Number Publication Date
EP1013829A2 true EP1013829A2 (de) 2000-06-28
EP1013829A3 EP1013829A3 (de) 2001-11-28
EP1013829B1 EP1013829B1 (de) 2005-02-09

Family

ID=19768370

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99204507A Expired - Lifetime EP1013829B1 (de) 1998-12-27 1999-12-27 Fräsgerät

Country Status (4)

Country Link
EP (1) EP1013829B1 (de)
AT (1) ATE288969T1 (de)
DE (1) DE69923649T2 (de)
NL (1) NL1010895C1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005005119A1 (de) * 2003-07-14 2005-01-20 Wirtgen Gmbh Baumaschine
US8181322B2 (en) 2008-05-26 2012-05-22 Wirtgen Gmbh Tool for removing a chisel
CN112720884A (zh) * 2020-12-23 2021-04-30 中交一公局集团有限公司海外分公司 刨毛设备

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19547698C2 (de) * 1995-12-20 2000-08-17 Wirtgen Gmbh Vorrichtung und Verfahren zum Abfräsen von harten Oberflächen, insbesondere von Straßenbelägen
DE19754371C1 (de) * 1996-08-27 1998-11-26 Nikolaus Wendel Fräsmaschine mit rotierendem Fräswerkzeug für gesteinsartige Materialien

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005005119A1 (de) * 2003-07-14 2005-01-20 Wirtgen Gmbh Baumaschine
JP2007533875A (ja) * 2003-07-14 2007-11-22 ヴィルトゲン ゲゼルシャフト ミット ベシュレンクテル ハフツング 建設機械
US7401862B2 (en) 2003-07-14 2008-07-22 Wirtgen Gmbh Construction machine
EP2060375A1 (de) * 2003-07-14 2009-05-20 Wirtgen GmbH Baumaschine
CN1816432B (zh) * 2003-07-14 2010-10-27 维特根有限公司 建筑机械
US8181322B2 (en) 2008-05-26 2012-05-22 Wirtgen Gmbh Tool for removing a chisel
US8286316B2 (en) 2008-05-26 2012-10-16 Wirtgen Gmbh Tool for removing a chisel
US9157320B2 (en) 2008-05-26 2015-10-13 Wirtgen Gmbh Tool for removing a chisel
CN112720884A (zh) * 2020-12-23 2021-04-30 中交一公局集团有限公司海外分公司 刨毛设备

Also Published As

Publication number Publication date
EP1013829B1 (de) 2005-02-09
DE69923649T2 (de) 2006-03-16
DE69923649D1 (de) 2005-03-17
EP1013829A3 (de) 2001-11-28
NL1010895C1 (nl) 2000-06-30
ATE288969T1 (de) 2005-02-15

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