EP0875625A2 - Fräswalze für Fräsmaschinen - Google Patents

Fräswalze für Fräsmaschinen Download PDF

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Publication number
EP0875625A2
EP0875625A2 EP98106304A EP98106304A EP0875625A2 EP 0875625 A2 EP0875625 A2 EP 0875625A2 EP 98106304 A EP98106304 A EP 98106304A EP 98106304 A EP98106304 A EP 98106304A EP 0875625 A2 EP0875625 A2 EP 0875625A2
Authority
EP
European Patent Office
Prior art keywords
annular elements
core
milling drum
elements
supplied
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
EP98106304A
Other languages
English (en)
French (fr)
Other versions
EP0875625B1 (de
EP0875625A3 (de
Inventor
Luciano Gelai
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.)
Caterpillar Prodotti Stradali SRL
Original Assignee
Bitelli SpA
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 Bitelli SpA filed Critical Bitelli SpA
Publication of EP0875625A2 publication Critical patent/EP0875625A2/de
Publication of EP0875625A3 publication Critical patent/EP0875625A3/de
Application granted granted Critical
Publication of EP0875625B1 publication Critical patent/EP0875625B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E01C23/08—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades
    • E01C23/085—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for roughening or patterning; for removing the surface down to a predetermined depth high spots or material bonded to the surface, e.g. markings; for maintaining earth roads, clay courts or like surfaces by means of surface working tools, e.g. scarifiers, levelling blades using power-driven tools, e.g. vibratory tools
    • E01C23/088—Rotary tools, e.g. milling drums
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/18—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools
    • B28D1/186—Tools therefor, e.g. having exchangeable cutter bits

Definitions

  • the invention concerns a perfecting milling drum suitable for being used in scarifier machines which are used for the removal of road surfaces.
  • scarifier machines supplied with a milling drum equipped with a plurality of operating protruding elements, are used in order to realise excavations or for the removal of the asphalt surface which covers the carriageways.
  • the operating elements are placed in contact with the soil to remove and during the rotation of the drum they shutter it, permitting this way its removal.
  • the scarifier machines are produced in different embodiments which are different, first of all, for the width of the milling drum, on which the kind of working to which the machine can be allocated, depends.
  • scarifier machines so called “universal", in which the milling drum is formed of a fixed part, firmly connected with the driving shaft, are usually used. On this one a removable part, formed of a plurality of rings, is arranged, each ring being formed of a couple of semicircular shells, on which the operating protruding elements, united among them by flanges, are arranged.
  • a first inconvenience is that the flanges which connect among them the semicircular shells that form each ring, create an interruption of the flowing of the material which, during the removal, is conveyed along the spirals formed by the operating elements and therefore they create an obstruction that compromises the good performance of the production.
  • the invention having reference number VI95AOOOO53, in which a scarifier machine, supplied with a milling drum, formed of rings that are axially threaded into the shaft of the milling drum, of a sufficient number to form the wanted digging width, is described, has been realised.
  • the utilizer of the scarifier can realise a variable digging width, according to the number of the rings which are used, but such solution presents the inconvenience that it can not always be applied to every kind of machines, since the possibility of reaching laterally the milling drum, in order to put up and take down the rings, is not possible in all the scarifier machines.
  • the present invention proposes to overcome all the mentioned inconveniences.
  • one of the purposes of the invention is for realising a milling drum of variable width which permits the realisation of excavations of a different width.
  • Another purpose is for such variation of width of the milling drum could be easily realised particularly on large - sized drums.
  • a further purpose is for such variation of width of the milling drum could be easily realised even in those machines in which the side access to the milling drum itself usually results difficult or is even prevented.
  • milling drum of the invention permits an easy flowing of the removed material along a propeller formed of the operating elements with which it is supplied.
  • the milling drum of the invention is supplied with five intermediate annular elements which comprise an annular element divided in four shells having the shape of a sector of a circle with a central angle of 90°, which is centrally arranged in comparison with the remaining other four annular elements, being each of them divided in two shells having the shape of a sector of a circle with a central angle of 180°.
  • the four shells which form the annular element arranged centrally, are connected among them by radial flanges and fastening means.
  • All the annular elements are arranged one close to the other and force reciprocally in correspondence with side conical surfaces realised on their side surfaces and also in correspondence with the end of said core, suitable for favouring the reciprocal axial blocking when the radial flanges of the shells, which form the annular element, arranged centrally, are fastened.
  • the drum of the invention presents, compared with milling drums belonging to the known technique equivalent to it, an easier assemblage and disassembly and a greater versatility in preparing the scarifier, according to different embodiments, and such therefore to permit the utilizer a greater flexibility of employment.
  • the milling drum of the invention in the variant visible in figs. 1 and 11, where it is indicated as a whole with 1, comprises a core 2 connected with the driving shaft of a scarifier machine not represented in the figures, on which, outside and coaxially, a plurality of annular elements is arranged comprising:
  • annular elements 3, 4 and 5 a plurality of operating protruding elements is applied, each of them indicated as a whole with 6, which are arranged like a spiral and that are suitable for shuttering said soil to remove with whom they come in contact.
  • Said annular elements 3, 4 and 5 are rotated by said core 2 by contrast means which are formed of a tang 7 which crosses the whole length of the core 2 and which mates in through seats realised on each of said annular elements 4 and 5 and besides, as fig. 11 shows with particular evidence, they are arranged one close to the other in correspondence with inclined surfaces 8 conjugated among them.
  • fig. 9 shows that each of them is formed of two semicircular shells 51, while the central annular element 4, as figs 4 and 5 in particular show, is formed of four shells 41, each of them corresponding to a quarter of a circle, which are connected among them by radial flanges 411 belonging to them by through bolts 412.
  • each ending annular element 3 axially forces against the conical ring 31, visible in fig. 12, fixed by screws 311 to the core 2.
  • the central annular element 4 is supplied, on the side surfaces of the shells 41 which form it, with inclined slots 420 supplied with a lateral opening 421, each of them suitable for receiving a pivot 19 when said shells 41 are radially coupled with the core 2 according to the direction 415 visible in fig. 2.
  • connection of the side annular elements 5 happens instead, as fig. 6 shows, by axial shifting, according to the direction 515 of each shell 51.
  • the milling drum of the invention presented therefore, after the assemblage, a symmetrical configuration compared with the transversal axis 10, which can be obtained beginning from the configuration represented in fig. 8 where on the core 2 two ending annular elements 3 are present.
  • the clamping of the bolts 412 unites the flanges 411 and axially forces, according to the directions opposed among them 515, the shells 41 of the central annular element 4, against the shells 51 of the side annular elements 5, in correspondence with the inclined surfaces 8, obtaining the axial clamping of all the annular elements among them and to the core 2.
  • the milling drum can also be realised according to a different configuration, for example that one represented in fig. 19, in which it is indicated with 100, being this configuration suitable for realising an excavation having a width 70, smaller than the length of the core 2.
  • Said distance rings each of them indicated as a whole with 9, and formed of two hemirings 91 which axially mate one close to the other, by the contact in correspondence with contrast inclined surfaces 92 conjugable among them and present in each of them, are coupled in order to realise such composition, beginning from the configuration represented in fig. 12, where both said ending annular elements 3 are moved to one side of the core 2, on the free zone 20 of the core 2 itself, as figs. from 13 to 16 show.
  • the assemblage of one or more distance rings 9 determines, as fig. 16 shows, the position of one of the ending annular elements 3 and then, as fig. 17 shows, the further ending annular element 3, opposed to the previous one, is moved towards the centre in the core 2 in order to arrange another couple of distance elements 9 as figs. 17 and 18 show.
  • the milling drum is therefore formed, as fig. 19 shows, of an only central annular element 4 and of a couple of ending annular elements 3, where said annular elements are symmetrically arranged, compared with the transversal axis of the drum.
  • the distance 70 in between the ending annular elements 3 forms, as it has just been said, the working digging width of the milling drum.
  • the clamping of the flanges 411 of the shells 51, which form the central annular element 4 determines the axial shrinkage of all the coupled elements on the core 2 which discharges itself on the inclined surface 312 of the conical rings 31 arranged at the ends, assuring the stiffness of the milling drum so formed.
  • each one realising a different digging width the radial flanges 411, present in the central annular element 4, act as conveyor blades which, during the rotation of the drum, send by centrifugal force the shuttered material, removed by the operating elements 6, on the conveyor belt, not represented in the figures, which conveys the material carried away from the working area.
  • This particular embodiment permits therefore to change easily the width of the milling drum, even in those machines in which the drum is hardly reachable on a side by the presence of obstructing elements. Indeed in the drum of the invention the replacement of the annular elements is easily realised intervening frontally under the core which supports the annular elements supplied with the operating elements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Shovels (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Adjustment And Processing Of Grains (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Road Repair (AREA)
  • Press Drives And Press Lines (AREA)
  • Milling Processes (AREA)
EP98106304A 1997-04-28 1998-04-07 Fräswalze für Fräsmaschinen Expired - Lifetime EP0875625B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVI970063 1997-04-28
IT97VI000063A IT1292984B1 (it) 1997-04-28 1997-04-28 Tamburo fresante di tipo perfezionato per macchine scarificatrici.

Publications (3)

Publication Number Publication Date
EP0875625A2 true EP0875625A2 (de) 1998-11-04
EP0875625A3 EP0875625A3 (de) 1999-08-11
EP0875625B1 EP0875625B1 (de) 2004-06-09

Family

ID=11426342

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98106304A Expired - Lifetime EP0875625B1 (de) 1997-04-28 1998-04-07 Fräswalze für Fräsmaschinen

Country Status (5)

Country Link
EP (1) EP0875625B1 (de)
AT (1) ATE268837T1 (de)
DE (1) DE69824340T2 (de)
ES (1) ES2226022T3 (de)
IT (1) IT1292984B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1375102A1 (de) * 2002-06-19 2004-01-02 BITELLI S.p.A. Frästrommel für Strassenbearbeitungsvorrichtung
US20230112546A1 (en) * 2021-10-13 2023-04-13 Caterpillar Paving Products Inc. Adjustable Pitch Rotor for Milling Applications

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010064589A1 (de) 2010-04-06 2015-04-16 Bomag Gmbh Fräswalze für eine Bodenfräsmaschine und Bodenfräsmaschine
DE102010013983B4 (de) 2010-04-06 2016-01-21 Bomag Gmbh Fräswalze für eine Bodenfräsmaschine und Bodenfräsmaschine
DE102011009092A1 (de) 2011-01-21 2012-07-26 Bomag Gmbh Rotorkasten für eine Bodenfräsmaschine mit Führungseinrichtung für Fräsgut und Bodenfräsmaschine mit einem solchen Rotorkasten

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5120112A (en) 1991-03-15 1992-06-09 Tamrock World Corporation, N.V. Vane type conveyor for a mining machine drum
US5505598A (en) 1994-07-29 1996-04-09 Wirtgen America, Inc. Milling machine with multi-width cutter

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4720207A (en) * 1986-08-29 1988-01-19 Koehring Company Segmented rotor
IT1280300B1 (it) * 1995-03-31 1998-01-08 Bitelli Spa Macchina scarificatrice con tamburo fresante di tipo perfezionato per la rimozione di manti stradali

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5120112A (en) 1991-03-15 1992-06-09 Tamrock World Corporation, N.V. Vane type conveyor for a mining machine drum
US5505598A (en) 1994-07-29 1996-04-09 Wirtgen America, Inc. Milling machine with multi-width cutter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Prospekt der Firma WIRTGEN GmbH SF 300 C", ANNOUNCEMENT WIRTGEN, XX, XX, 1 January 1989 (1989-01-01), XX, pages complete, XP002947699

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1375102A1 (de) * 2002-06-19 2004-01-02 BITELLI S.p.A. Frästrommel für Strassenbearbeitungsvorrichtung
US6832818B2 (en) 2002-06-19 2004-12-21 Bitelli S.P.A. Milling drum for road working machine
US20230112546A1 (en) * 2021-10-13 2023-04-13 Caterpillar Paving Products Inc. Adjustable Pitch Rotor for Milling Applications
US11866891B2 (en) * 2021-10-13 2024-01-09 Caterpillar Paving Products Inc. Adjustable pitch rotor for milling applications

Also Published As

Publication number Publication date
IT1292984B1 (it) 1999-02-11
ES2226022T3 (es) 2005-03-16
ITVI970063A0 (it) 1997-04-28
EP0875625B1 (de) 2004-06-09
ITVI970063A1 (it) 1998-10-28
ATE268837T1 (de) 2004-06-15
DE69824340D1 (de) 2004-07-15
EP0875625A3 (de) 1999-08-11
DE69824340T2 (de) 2005-06-09

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