EP1070788A2 - Rückhaltekammer für Fräswalze von Fräsmaschinen - Google Patents

Rückhaltekammer für Fräswalze von Fräsmaschinen Download PDF

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Publication number
EP1070788A2
EP1070788A2 EP00114932A EP00114932A EP1070788A2 EP 1070788 A2 EP1070788 A2 EP 1070788A2 EP 00114932 A EP00114932 A EP 00114932A EP 00114932 A EP00114932 A EP 00114932A EP 1070788 A2 EP1070788 A2 EP 1070788A2
Authority
EP
European Patent Office
Prior art keywords
drum
chamber
milling drum
curved wall
air gap
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
EP00114932A
Other languages
English (en)
French (fr)
Other versions
EP1070788B1 (de
EP1070788A3 (de
Inventor
Romolo Bitelli
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 Paving Products Inc
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 EP1070788A2 publication Critical patent/EP1070788A2/de
Publication of EP1070788A3 publication Critical patent/EP1070788A3/de
Application granted granted Critical
Publication of EP1070788B1 publication Critical patent/EP1070788B1/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

Definitions

  • the finding relates to a containment chamber of the milling drum of road scarifiers.
  • road scarifiers are machines used for removing bitumen road surfaces, concrete road surfaces, or the like, which cover for example road sites.
  • They substantially comprise a frame mounted on wheels provided with a propulsion unit, with a driving seat for the operator, and with a milling drum arranged in contact with the road surface to be removed.
  • the milling drum presents a plurality of active elements, realised with different shapes according to the use requirements, which - during the rotation of the milling drum - crumble the road surface with which they come into contact.
  • the milling drum is contained into a chamber laterally delimited by the frame body sides, and on the upper side, for at least a portion, by a curved wall with the concavity facing the active elements, and spaced from them.
  • the material removed by the active elements is directed -by centrifugal force - towards the above curved wall, which conveys it onto a conveyor belt, which unloads it, for example, into the body of a lorry.
  • Figure 1 shows a known embodiment of the containment chamber C of the milling drum T of a road scarifier M, wherein it can be seen that the curved wall P is realised with a profile concentric to the milling drum T by an angle ⁇ of about 90°.
  • the air gap defined between the curved wall P and the periphery of drum T presents a constant and the most reduced possible radial width R along its entire development, so as to guarantee an even distribution of the milled material into the air gap itself, preventing it from accumulating above all in the front side of the drum.
  • the portion of wall which is more affected by this phenomenon is the upper central portion, the farthest from the ground, identified with W in figure 1, wherein the milled material collects by virtue of the transport effect due to the centrally-convergent helicoidal arrangement of the active elements A arranged onto the milling drum T.
  • a solution adopted in the attempt to reduce said disadvantage consists in realising the curved wall P with high-resistance materials, adapted to delay its wear.
  • the present finding has the object of obviating said disadvantages.
  • First object of the finding is that of providing a containment chamber for the milling drum of a road scarifier wherein the curved wall covering the drum should be less subject to wear than known embodiments.
  • Another object is that of providing the chamber of the finding as being realised using commercial steel plates.
  • Last but not least, another object is that of providing the chamber of the finding as having manufacturing costs not exceeding those of the chambers of the known type that are equivalent to it.
  • a containment chamber for the milling drum of road scarifiers of the type comprising a frame mounted on wheels adapted to support said milling drum, and provided with a propulsion unit and with a driving seat for the operator, said chamber being laterally delimited by the body sides of said frame, and on the upper side, for at least a portion, by a curved wall with the concavity facing said drum and spaced from the active elements for the removal of the road surface with which said drum is provided, and it is characterised in that the air gap defined between said curved wall and said active elements presents a variable radial width for at least a portion of its development.
  • the radial width of the air gap is minimum at the horizontal radial direction which substantially corresponds to the inlet point of the removed material, and it is maximum at the vertical radial direction rotated by 90° with respect to the former one, which substantially corresponds to the outlet point of the removed material.
  • the curved wall presents a profile which is transversal to the axis of the drum, consisting of an arch of ellipse.
  • the curved wall presents a profile which is transversal to the axis of the drum, consisting of an arch of circumference.
  • the chamber of the finding allows a better conveyance of the milled material than with the prior art.
  • the chamber of the finding has a greater width in the portion wherein the milled material concentrates, it presents a lower wear.
  • the increase of volume of the air gap at the unload decreases the pressure of the material against the curved wall, and makes the expulsion from the chamber faster.
  • the containment chamber of the finding houses the milling drum 2 of a road scanfier, referred to in its whole with M, which comprises a frame 3 mounted on wheels 4 , provided with a propulsion unit 5 and a driving seat 6 for the operator.
  • the milling machine 2 is supported by frame 3 , and it presents active elements 2a that, during the rotation of the milling drum, come into contact with the surface to be removed which, for example, can be the bitumen road surface 7 which covers a road site.
  • chamber 1 is delimited, on its sides, by the side walls of frame 3 of the road scarifier, and in the upper side, by a curved wall 8 with concavity 8a facing drum 2 and spaced from its active elements 2a .
  • air gap 9 defined between the curved wall 8 and the active elements 2a of the milling drum 2 presents a variable radial width l for at least a portion of its development.
  • the radial width l changes from the minimum value a at the horizontal radial direction determined by an axis x, to the maximum value b at the vertical radial direction determined by an axis y, where axes x and y represent a Cartesian reference system having the origin coinciding with the centre O of the milling drum 2 .
  • the curved wall of the finding realised according to the described elliptical or circular profiles, attains the set purposes.
  • the chamber can be of any shape and size, and the development of the curved wall delimiting the chamber can be geometrically defined also according to another curve with respect to a circle or an ellipse.
EP00114932A 1999-07-23 2000-07-18 Fräsmaschine mit eingehauster Fräswalze Expired - Lifetime EP1070788B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVI990061U 1999-07-23
ITVI990061 IT248863Y1 (it) 1999-07-23 1999-07-23 Camera di contenimento per tamburo fresante di macchine scarificatrici

Publications (3)

Publication Number Publication Date
EP1070788A2 true EP1070788A2 (de) 2001-01-24
EP1070788A3 EP1070788A3 (de) 2002-08-14
EP1070788B1 EP1070788B1 (de) 2007-05-23

Family

ID=11426994

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00114932A Expired - Lifetime EP1070788B1 (de) 1999-07-23 2000-07-18 Fräsmaschine mit eingehauster Fräswalze

Country Status (3)

Country Link
EP (1) EP1070788B1 (de)
DE (1) DE60034907T2 (de)
IT (1) IT248863Y1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2378000A2 (de) 2010-04-17 2011-10-19 BOMAG GmbH Rotorkasten für eine Bodenfräsmaschine und Bodenfräsmaschine mit einem solchen Rotorkasten
CN102493325A (zh) * 2011-12-17 2012-06-13 于健 一种路面铣刨机
EP2479344A1 (de) 2011-01-21 2012-07-25 BOMAG GmbH Rotorkasten für eine Bodenfräsmaschine mit Führungseinrichtung für Fräsgut und Bodenfräsmaschine mit einem solchen Rotorkasten
US20150130257A1 (en) * 2012-06-25 2015-05-14 Wirtgen Gmbh Road Milling Machine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3802742A (en) * 1972-06-13 1974-04-09 E Zuzelo Multiple grooving of pavement
EP0735193A2 (de) * 1995-03-30 1996-10-02 BITELLI S.p.A. Fräsvorrichtung zum Entfernen von Strassendecken

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3802742A (en) * 1972-06-13 1974-04-09 E Zuzelo Multiple grooving of pavement
EP0735193A2 (de) * 1995-03-30 1996-10-02 BITELLI S.p.A. Fräsvorrichtung zum Entfernen von Strassendecken

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2378000A2 (de) 2010-04-17 2011-10-19 BOMAG GmbH Rotorkasten für eine Bodenfräsmaschine und Bodenfräsmaschine mit einem solchen Rotorkasten
DE102011009093A1 (de) 2010-04-17 2011-10-20 Bomag Gmbh Rotorkasten für eine Bodenmaschine und Bodenmaschine mit einem solchen Rotorkasten
US8297877B2 (en) 2010-04-17 2012-10-30 Bomag Gmbh Rotor box for a ground milling machine and ground milling machine having such a rotor box
EP2479344A1 (de) 2011-01-21 2012-07-25 BOMAG GmbH Rotorkasten für eine Bodenfräsmaschine mit Führungseinrichtung für Fräsgut und Bodenfräsmaschine mit einem solchen Rotorkasten
DE102011009092A1 (de) 2011-01-21 2012-07-26 Bomag Gmbh Rotorkasten für eine Bodenfräsmaschine mit Führungseinrichtung für Fräsgut und Bodenfräsmaschine mit einem solchen Rotorkasten
CN102493325A (zh) * 2011-12-17 2012-06-13 于健 一种路面铣刨机
CN102493325B (zh) * 2011-12-17 2013-10-23 于健 一种路面铣刨机
US20150130257A1 (en) * 2012-06-25 2015-05-14 Wirtgen Gmbh Road Milling Machine
US9714488B2 (en) * 2012-06-25 2017-07-25 Wirtgen Gmbh Road milling machine

Also Published As

Publication number Publication date
ITVI990061U1 (it) 2001-01-23
EP1070788B1 (de) 2007-05-23
IT248863Y1 (it) 2003-02-20
DE60034907D1 (de) 2007-07-05
EP1070788A3 (de) 2002-08-14
DE60034907T2 (de) 2008-01-17

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