EP0429051A1 - Drum shearer - Google Patents

Drum shearer Download PDF

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Publication number
EP0429051A1
EP0429051A1 EP90122134A EP90122134A EP0429051A1 EP 0429051 A1 EP0429051 A1 EP 0429051A1 EP 90122134 A EP90122134 A EP 90122134A EP 90122134 A EP90122134 A EP 90122134A EP 0429051 A1 EP0429051 A1 EP 0429051A1
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EP
European Patent Office
Prior art keywords
electric motor
drive shafts
shafts
cutting machine
drive
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Granted
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EP90122134A
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German (de)
French (fr)
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EP0429051B1 (en
Inventor
Rolf Gnauert
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Individual
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Individual
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C31/00—Driving means incorporated in machines for slitting or completely freeing the mineral from the seam
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C27/00—Machines which completely free the mineral from the seam
    • E21C27/02—Machines which completely free the mineral from the seam solely by slitting

Definitions

  • the invention relates to a roller cutting machine according to the features in the preamble of claim 1.
  • Such a roller cutting machine is part of the prior art through the German laid-open specification 27 41 660. If, according to an embodiment of this known type, hydraulic drive units consisting of each pump and motor are used for the longitudinal feed, the pumps of these drive units are driven via spur gear drives by the drive shafts extending in a straight line between the central electric motor and the roller head drives.
  • the invention is based on the drum cutting machine described in the preamble of claim 1, the problem of building this short with purely electric drive and to maintain the straight-line aging straight drive shafts between the central electric motor and the roller head gears.
  • the arrangement of hollow shafts that can be driven with electrical energy on the circumference of the linear drive shafts creates the conditions for maintaining the comparatively simple bearings for the drive shafts can be and with little space required, the necessary force can still be applied to the drive shafts via the hollow shafts at a suitable point in order to ensure the longitudinal feed of the roller cutting machine in one or the other direction of movement.
  • An advantageous embodiment of the basic idea according to the invention consists in the features of claim 2.
  • the energy for generating the longitudinal feed of the roller cutting machine is derived exclusively from the central electric motor.
  • no further drive unit is therefore provided in the machine housing.
  • the couplings in particular eddy current couplings, can be accommodated in the machine housing on the circumference of the drive shafts with a comparatively small space requirement. Consequently, the incorporation of such clutches, preferably eddy current clutches, leads to a short overall length of the machine housing.
  • Figures 1 and 2 each show a schematic plan view of the drive elements for the rotation of the cutting rollers and for the longitudinal feed of a double-roller cutting machine.
  • 1 in FIGS. 1 and 2 in dash-dotted lines the machine housing of the double-roll cutting machine 2 (hereinafter called the cutting machine for short).
  • the machine housing 1 is subdivided into a number of structural units 3, 4, 5, which both facilitates the transport of a cutting machine 2 to the underground site as well as maintenance and repair.
  • the machine housing 1 is subdivided, for example, into three structural units 3, 4, 5.
  • the cutting machine 2 has at both ends not shown cutting rollers as end components of pivoting arms 7 pivotable about horizontal axes 7.
  • the cutting arms 7 can, for. B. can be pivoted vertically by also not shown in Figures 1 and 2 cylinders.
  • the rotary movement of the cutting rollers is generated by an electric motor 8, which is housed in the central unit 4.
  • the electric motor 8 has two outlets 9 pointing in the longitudinal direction of the machine housing 1, to which rectilinear drive shafts 10 are connected.
  • the other ends of the drive shafts 10 are connected to roller head gears 11, which are coupled in terms of drive technology to the cutting rollers via gear trains (not shown in detail) in the cutting arms 7.
  • rotatable gears 13 are mounted about horizontal axes 12, which cooperate with a toothed rack 14 which is arranged along the positive guidance for the cutting machine 2, which consists, for example, of a face conveyor (not shown).
  • the gear wheels 13 are connected via gear trains 15 to the secondary wheels 16 of eddy current clutches 17, which form components of hollow shafts 18 which surround the drive shafts 10 in a relatively rotatable manner.
  • the primary wheels 19 of the eddy current clutches 17 are fastened on the drive shafts 10. If an electric field is built up between a primary wheel 19 and a secondary wheel 16, the energy emitted by the central electric motor 8 can be brought to the respective gear 13 via the corresponding eddy current clutch 17 and the downstream gear train 15 and in this way the cutting machine 2 along the rack 14 be shifted in the desired direction.
  • the gearwheels 13 are connected via gear trains 20 to hollow shafts 21, which relatively rotatably enclose the drive shafts 10, as components of further electric motors 22.
  • the energy of the central electric motor 8 is not used for the longitudinal feed of the cutting machine 2, but rather the energy of the additional electric motors 22 which surround the drive shafts 10 concentrically and are arranged coaxially to the central electric motor 8.

Abstract

The drum shearer (2) has vertically adjustable shearing drums at the ends. The shearing drums are driven in rotation from a central electric motor (8). For this, there are drive shafts (10) which extend in a straight line between the electric motor (8) and drum-head gears (11) provided in the region of the pivot axles (6) of the shearing arms (7) assigned to the shearing drums. The drive shafts (10) are enclosed by hollow shafts (18) as integral parts of eddy-current couplings (17). The hollow shafts (18) are connected via gear trains (15) to the gearwheels (13) causing the longitudinal advances of the drum shearer (2). The hollow shafts surrounding the drive shafts (10) can also form an integral part of electric motors extending coaxially relative to the central electric motor (8) in the longitudinal direction of the machine housing (1). <IMAGE>

Description

Die Erfindung betrifft eine Walzenschrämmaschine gemäß den Merkmalen im Oberbegriff des Anspruchs 1.The invention relates to a roller cutting machine according to the features in the preamble of claim 1.

Eine derartige Walzenschrämmaschine zählt durch die deutsche Offenlegungsschrift 27 41 660 zum Stand der Technik. Gelan­gen gemäß einer Ausführungsform dieser bekannten Bauart für den Längsvorschub hydraulische Antriebsaggregate aus jeweils Pumpe und Motor zur Anwendung, so werden die Pumpen dieser Antriebsaggregate über Stirnradgetriebe von den sich zwischen dem zentralen Elektromotor und den Walzenkopfge­trieben geradlinig erstreckenden Antriebswellen angetrieben.Such a roller cutting machine is part of the prior art through the German laid-open specification 27 41 660. If, according to an embodiment of this known type, hydraulic drive units consisting of each pump and motor are used for the longitudinal feed, the pumps of these drive units are driven via spur gear drives by the drive shafts extending in a straight line between the central electric motor and the roller head drives.

Obwohl es durch die Untergliederung der hydraulischen An­triebsaggregate in Pumpen und Motoren möglich ist, diese beiden Bauteile räumlich günstig im Maschinengehäuse unter­zubringen, ist hiermit dennoch der Nachteil des hydrauli­schen Mediums verbunden. Abgesehen davon, daß die hydrauli­schen Antriebsaggregate im untertägigen Grubenbetrieb einer sehr intensiven und sorgfältigen Wartung bedürfen, kann grundsätzlich nicht ausgeschlossen werden, daß Hydraulik­flüssigkeit austritt und aufgrund der verschärften Umwelt­bedingungen in einem vergleichsweise schwierigen untertägi­gen Betriebspunkt mühsam entsorgt werden muß.Although the subdivision of the hydraulic drive units into pumps and motors makes it possible to accommodate these two components in the machine housing in a space-saving manner, the disadvantage of the hydraulic medium is nevertheless associated with this. Apart from the fact that the hydraulic drive units in underground mining operations require very intensive and careful maintenance in principle, it cannot be ruled out that hydraulic fluid escapes and, due to the tougher environmental conditions, must be laboriously disposed of in a comparatively difficult underground operating point.

Werden hingegen im bekannten Fall entsprechend einer weite­ren Ausführungsform den Antriebseinrichtungen für den Längs­vorschub gesonderte Elektromotoren zugeordnet, so ist es erforderlich, diese unter Verlängerung des Maschinengehäuses an dessen Stirnseiten unterzubringen, sofern nicht einer dritten Version der Vorzug gegeben wird, wonach die Elektro­motoren für den Längsvorschub benachbart dem zentralen Elek­tromotor angeordnet werden. Bei dieser Version können jedoch nicht mehr einfache geradlinige Antriebswellen zwischen dem zentralen Elektromotor und den Walzenkopfgetrieben ein­gesetzt werden. Vielmehr müssen die den Längsvorschub erzeu­genden Elektromotoren mit mehrfach abgewinkelten Getriebe­zügen in komplizierter Weise umgangen werden.On the other hand, if, in the known case, according to a further embodiment, separate electric motors are assigned to the drive devices for the longitudinal feed, it is necessary to accommodate them at the end faces of the machine housing, unless a third version is preferred, according to which the electric motors for the longitudinal feed are adjacent the central electric motor can be arranged. In this version, however, straight line drive shafts can no longer be used between the central electric motor and the roller head gears. Rather, the electric motors generating the longitudinal feed must be circumvented in a complicated manner with multiple-angled gear trains.

Der Erfindung liegt ausgehend von der im Oberbegriff des Anspruchs 1 beschriebenen Walzenschrämmaschine das Problem zugrunde, diese mit rein elektrischem Antrieb kurz zu bauen und die geradlinigen altung geradliniger Antriebswellen zwischen dem zentralen Elektromotor und den Walzenkopfge­trieben beizubehalten.The invention is based on the drum cutting machine described in the preamble of claim 1, the problem of building this short with purely electric drive and to maintain the straight-line aging straight drive shafts between the central electric motor and the roller head gears.

Die Lösung dieses Problems wird nach der Erfindung in den im kennzeichnenden Teil des Anspruchs 1 aufgeführten Merk­malen gesehen.The solution to this problem is seen according to the invention in the features listed in the characterizing part of claim 1.

Die Anordnung von mit elektrischer Energie antreibbaren Hohlwellen umfangsseitig der geradlinigen Antriebswellen schafft die Voraussetzungen dafür, daß die vergleichsweise einfachen Lagerungen für die Antriebswellen beibehalten werden können und bei geringem Raumbedarf dennoch an geeig­neter Stelle der Antriebswellen über die Hohlwellen die notwendige Kraft aufgebracht werden kann, um den Längsvor­schub der Walzenschrämmaschine in die eine oder die andere Bewegungsrichtung zu gewährleisten.The arrangement of hollow shafts that can be driven with electrical energy on the circumference of the linear drive shafts creates the conditions for maintaining the comparatively simple bearings for the drive shafts can be and with little space required, the necessary force can still be applied to the drive shafts via the hollow shafts at a suitable point in order to ensure the longitudinal feed of the roller cutting machine in one or the other direction of movement.

Eine vorteilhafte Ausführungsform des erfindungsgemäßen Grundgedankens besteht in den Merkmalen des Anspruchs 2. Hierbei wird die Energie zur Erzeugung des Längsvorschubs der Walzenschrämmaschine ausschließlich vom zentralen Elek­tromotor abgeleitet. Neben diesem Elektromotor und neben den Hubvorrichtungen für die Schrämarme der Schrämwalzen ist mithin keine weitere Antriebseinheit im Maschinengehäuse vorgesehen. Die Kupplungen, insbesondere Wirbelstromkupp­lungen, können mit vergleichsweise geringem Raumbedarf um­fangsseitig der Antriebswellen im Maschinengehäuse unterge­bracht werden. Folglich führt die Eingliederung solcher Kupplungen, vorzugsweise Wirbelstromkupplungen, zu einer kurzen Baulänge des Maschinengehäuses.An advantageous embodiment of the basic idea according to the invention consists in the features of claim 2. The energy for generating the longitudinal feed of the roller cutting machine is derived exclusively from the central electric motor. In addition to this electric motor and in addition to the lifting devices for the cutting arms of the cutting rollers, no further drive unit is therefore provided in the machine housing. The couplings, in particular eddy current couplings, can be accommodated in the machine housing on the circumference of the drive shafts with a comparatively small space requirement. Consequently, the incorporation of such clutches, preferably eddy current clutches, leads to a short overall length of the machine housing.

Eine andere ebenso vorteilhafte Ausführungsform des erfin­dungsgemäßen Grundgedankens ist im Anspruch 3 gekennzeich­net. Hierbei sind zwar neben dem zentralen Elektromotor noch zwei weitere Elektromotoren in das Maschinengehäuse einge­gliedert, jedoch nunmehr in Längsrichtung. Die Elektromoto­ren besitzen durchgehende Hohlwellen, welche von den gerad­linigen Antriebswellen durchsetzt sind. Auch auf diese Weise kann eine vergleichsweise kurze Baulänge eines Maschinenge­häuses bei günstiger Integration der zusätzlichen Elektro­motoren erreicht werden.Another equally advantageous embodiment of the basic idea of the invention is characterized in claim 3. Here, in addition to the central electric motor, two further electric motors are integrated into the machine housing, but now in the longitudinal direction. The electric motors have continuous hollow shafts, which are penetrated by the straight drive shafts. In this way too, a comparatively short overall length of a machine housing can be achieved with favorable integration of the additional electric motors.

Die Erfindung ist nachfolgend anhand von in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert. Dabei zeigen die Figuren 1 und 2 jeweils in schematischer Drauf­sicht die Antriebselemente für die Rotation der Schrämwalzen und für den Längsvorschub einer Doppelwalzen-Schrämmaschine. Mit 1 ist in den Figuren 1 und 2 in strichpunktierter Linien­führung das Maschinengehäuse der Doppelwalzen-Schrämmaschine 2 (nachfolgend kurz Schrämmaschine genannt) bezeichnet. Das Maschinengehäuse 1 ist in mehrere Baueinheiten 3, 4, 5 untergliedert, was sowohl den Transport einer Schrämma­schine 2 zum untertägigen Einsatzort als auch die Wartung sowie die Reparatur erleichtert. Bei den beiden Ausführungs­beispielen sei angenommen, daß das Maschinengehäuse 1 bei­spielsweise in drei Baueinheiten 3, 4, 5 untergliedert ist.The invention is explained in more detail below with reference to exemplary embodiments shown in the drawing. Figures 1 and 2 each show a schematic plan view of the drive elements for the rotation of the cutting rollers and for the longitudinal feed of a double-roller cutting machine. 1 in FIGS. 1 and 2 in dash-dotted lines the machine housing of the double-roll cutting machine 2 (hereinafter called the cutting machine for short). The machine housing 1 is subdivided into a number of structural units 3, 4, 5, which both facilitates the transport of a cutting machine 2 to the underground site as well as maintenance and repair. In the two exemplary embodiments it is assumed that the machine housing 1 is subdivided, for example, into three structural units 3, 4, 5.

Die Schrämmaschine 2 besitzt an den beiden Enden nicht näher veranschaulichte Schrämwalzen als endseitige Bestandteile von um horizontale Achsen 6 schwenkbaren Schrämarmen 7. Die Schrämarme 7 können z. B. durch in den Figuren 1 und 2 ebenfalls nicht näher dargestellte Zylinder vertikal ver­schwenkt werden.The cutting machine 2 has at both ends not shown cutting rollers as end components of pivoting arms 7 pivotable about horizontal axes 7. The cutting arms 7 can, for. B. can be pivoted vertically by also not shown in Figures 1 and 2 cylinders.

Die Drehbewegung der Schrämwalzen wird durch einen Elektro­motor 8 erzeugt, der in der zentralen Baueinheit 4 unterge­bracht ist. Der Elektromotor 8 besitzt zwei in Längsrichtung des Maschinengehäuses 1 weisende Abgänge 9, an die gerad­linige Antriebswellen 10 angeschlossen sind. Mit ihren an­deren Enden sind die Antriebswellen 10 mit Walzenkopfgetrie­ben 11 verbunden, welche über nicht näher veranschaulichte Getriebezüge in den Schrämarmen 7 mit den Schrämwalzen an­triebstechnisch gekoppelt sind.The rotary movement of the cutting rollers is generated by an electric motor 8, which is housed in the central unit 4. The electric motor 8 has two outlets 9 pointing in the longitudinal direction of the machine housing 1, to which rectilinear drive shafts 10 are connected. The other ends of the drive shafts 10 are connected to roller head gears 11, which are coupled in terms of drive technology to the cutting rollers via gear trains (not shown in detail) in the cutting arms 7.

Für den Längsvorschub der Schrämmaschine 2 sind in den end­seitigen Baueinheiten 3, 5 um horizontale Achsen 12 drehbare Zahnräder 13 gelagert, welche mit einer Zahnstange 14 zusam­menwirken, die entlang der beispielsweise aus einem nicht näher veranschaulichten Strebförderer bestehenden Zwangsfüh­rung für die Schrämmaschine 2 angeordnet ist.For the longitudinal feed of the cutting machine 2, in the end-side units 3, 5, rotatable gears 13 are mounted about horizontal axes 12, which cooperate with a toothed rack 14 which is arranged along the positive guidance for the cutting machine 2, which consists, for example, of a face conveyor (not shown).

Bei der Ausführungsform der Figur 1 sind die Zahnräder 13 über Getriebezüge 15 mit den Sekundärrädern 16 von Wirbel­stromkupplungen 17 verbunden, die Bestandteile von die An­triebswellen 10 relativverdrehbar umschließenden Hohlwellen 18 bilden. Die Primärräder 19 der Wirbelstromkupplungen 17 sind auf den Antriebswellen 10 befestigt. Wird also ein elektrisches Feld zwischen einem Primärrad 19 und einem Sekundärrad 16 aufgebaut, kann die von dem zentralen Elek­tromotor 8 abgegebene Energie über die entsprechende Wirbel­stromkupplung 17 und den nachgeordneten Getriebezug 15 auf das jeweilige Zahnrad 13 gebracht und auf diese Weise die Schrämmaschine 2 entlang der Zahnstange 14 in die gewünschte Richtung verlagert werden.In the embodiment of FIG. 1, the gear wheels 13 are connected via gear trains 15 to the secondary wheels 16 of eddy current clutches 17, which form components of hollow shafts 18 which surround the drive shafts 10 in a relatively rotatable manner. The primary wheels 19 of the eddy current clutches 17 are fastened on the drive shafts 10. If an electric field is built up between a primary wheel 19 and a secondary wheel 16, the energy emitted by the central electric motor 8 can be brought to the respective gear 13 via the corresponding eddy current clutch 17 and the downstream gear train 15 and in this way the cutting machine 2 along the rack 14 be shifted in the desired direction.

Bei der Ausführungsform der Figur 2 sind die Zahnräder 13 über Getriebezüge 20 mit die Antriebswellen 10 relativver­drehbar umschließenden Hohlwellen 21 als Bestandteile von weiteren Elektromotoren 22 verbunden. Bei dieser Bauart wird folglich nicht die Energie des zentralen Elektromotors 8 zum Längsvorschub der Schrämmaschine 2 genutzt, sondern die Energie der die Antriebswellen 10 konzentrisch umschließen­den und koaxial zum zentralen Elektromotor 8 angeordneten zusätzlichen Elektromotoren 22.In the embodiment in FIG. 2, the gearwheels 13 are connected via gear trains 20 to hollow shafts 21, which relatively rotatably enclose the drive shafts 10, as components of further electric motors 22. In this type of construction, consequently, the energy of the central electric motor 8 is not used for the longitudinal feed of the cutting machine 2, but rather the energy of the additional electric motors 22 which surround the drive shafts 10 concentrically and are arranged coaxially to the central electric motor 8.

Die Bedienungs-, Steuer- und Regelelemente der Schrämmaschi­ne 2 sind zur Aufrechterhaltung der Zeichnungsübersichtlich­keit nicht näher veranschaulicht.The operating, control and regulating elements of the cutting machine 2 are not illustrated in more detail in order to maintain the clarity of the drawings.

BezugszeichenaufstellungList of reference symbols

  • 1 - Maschinengehäuse v. 21 - machine housing v. 2nd
  • 2 - Schrämmaschine2 - cutting machine
  • 3 - Baueinheit3 - unit
  • 4 - Baueinheit4 - unit
  • 5 - Baueinheit5 - unit
  • 6 - Achsen v. 76 - axles from 7
  • 7 - Schrämarm7 - cutter arm
  • 8 - Elektromotor8 - electric motor
  • 9 - Abgänge v. 89 - exits from 8th
  • 10 - Antriebswellen10 - drive shafts
  • 11 - Walzenkopfgetriebe11 - Roller head gear
  • 12 - Achsen v. 1312-axis v. 13
  • 13 - Zahnräder13 - gears
  • 14 - Zahnstange14 - rack
  • 15 - Getriebezüge15 - gear trains
  • 16 - Sekundärräder v. 1716 - secondary wheels from 17th
  • 17 - Wirbelstromkupplungen17 - Eddy current clutches
  • 18 - Hohlwellen18 - hollow shafts
  • 19 - Primärräder v. 1719 - primary wheels from 17th
  • 20 - Getriebezüge20 - gear trains
  • 21 - Hohlwellen21 - hollow shafts
  • 22 - Elektromotoren22 - electric motors

Claims (3)

1. Walzenschrämmaschine, die eine Antriebseinrichtung (13) für den Längsvorschub und endseitig des Maschinengehäuses (1) je eine vertikal schwenkbare Schrämwalze aufweist, wel­che beide von einem zentral im Maschinengehäuse (1) angeord­neten Elektromotor (8) mittels Walzenkopfgetriebe (11) an­treibbar sind, wobei sich zwischen dem Elektromotor (8) und den Walzenkopfgetrieben (11) geradlinige Antriebswellen (10) erstrecken, dadurch gekennzeichnet, daß jede Antriebswelle (10) von einer elektrisch antreibbaren und über einen Getriebezug (15, 20) mit der Antriebseinrich­tung (13) für den Längsvorschub gekoppelten Hohlwelle (18, 21) umschlossen ist.1. roller cutting machine which has a drive device (13) for the longitudinal feed and at the end of the machine housing (1) each has a vertically pivotable cutting roller, both of which can be driven by an electric motor (8) arranged centrally in the machine housing (1) by means of roller head gears (11), linear drive shafts (10) extending between the electric motor (8) and the roller head gears (11), characterized in that each drive shaft (10) has an electrically drivable gear train (15, 20) with the drive device (13) for the longitudinal feed coupled hollow shaft (18, 21) is enclosed. 2. Walzenschrämmaschine nach Anspruch 1 ,dadurch gekennzeichnet, daß die Hohlwelle (18) Bestand­teil einer Kupplung (17), insbesondere einer Wirbelstromkupp­lung (17), bildet.2. Roll cutting machine according to claim 1, characterized in that the hollow shaft (18) forms part of a clutch (17), in particular an eddy current clutch (17). 3. Walzenschrämmaschine nach Anspruch 1, dadurch gekennzeichnet, daß die Hohlwelle (21) die Abtriebswelle eines Elektromotors (22) bildet und diesen auf ganzer Länge durchsetzt.3. Roll cutting machine according to claim 1, characterized in that the hollow shaft (21) forms the output shaft of an electric motor (22) and passes through it over its entire length.
EP19900122134 1989-11-21 1990-11-20 Drum shearer Expired - Lifetime EP0429051B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19893938572 DE3938572A1 (en) 1989-11-21 1989-11-21 ROLLING CUTTER
DE3938572 1989-11-21

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EP0429051A1 true EP0429051A1 (en) 1991-05-29
EP0429051B1 EP0429051B1 (en) 1993-04-21

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3329702A1 (en) * 1983-08-17 1985-03-07 Gebr. Eickhoff Maschinenfabrik U. Eisengiesserei Mbh, 4630 Bochum ROLLING MILLING MACHINE, WHICH IS EQUIPPED WITH A CLEANING ROLLER MOTOR AND A WINCH MOTOR
DE3810374C1 (en) * 1988-03-26 1989-11-16 Bergwerksverband Gmbh, 4300 Essen, De Double-drum shearer

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2741660C2 (en) * 1977-09-16 1981-11-26 Gebr. Eickhoff, Maschinenfabrik U. Eisengiesserei Mbh, 4630 Bochum Roller cutting machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3329702A1 (en) * 1983-08-17 1985-03-07 Gebr. Eickhoff Maschinenfabrik U. Eisengiesserei Mbh, 4630 Bochum ROLLING MILLING MACHINE, WHICH IS EQUIPPED WITH A CLEANING ROLLER MOTOR AND A WINCH MOTOR
DE3810374C1 (en) * 1988-03-26 1989-11-16 Bergwerksverband Gmbh, 4300 Essen, De Double-drum shearer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GLÜCKAUF, Band 117, Nr. 2, 22. Januar 1981, Seiten 78-82, Bochum, DE; K.-H. BOROWSKI: "Mögliche Entwicklungsrichtungen der Gewinnungstechnik aus der Sicht der Hersteller" *

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DE3938572A1 (en) 1991-05-23
DE3938572C2 (en) 1991-11-28
EP0429051B1 (en) 1993-04-21

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