EP0841467B1 - Rock milling head - Google Patents

Rock milling head Download PDF

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Publication number
EP0841467B1
EP0841467B1 EP97118802A EP97118802A EP0841467B1 EP 0841467 B1 EP0841467 B1 EP 0841467B1 EP 97118802 A EP97118802 A EP 97118802A EP 97118802 A EP97118802 A EP 97118802A EP 0841467 B1 EP0841467 B1 EP 0841467B1
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EP
European Patent Office
Prior art keywords
housing
cutting head
drive
head according
bearing
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Expired - Lifetime
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EP97118802A
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German (de)
French (fr)
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EP0841467A1 (en
Inventor
Hans Schaeff
Ian Frederick Webster
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Schaeff and Co
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Webster Schaeff and Co
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Publication of EP0841467A1 publication Critical patent/EP0841467A1/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/10Making by using boring or cutting machines
    • E21D9/1006Making by using boring or cutting machines with rotary cutting tools
    • E21D9/1013Making by using boring or cutting machines with rotary cutting tools on a tool-carrier supported by a movable boom
    • E21D9/102Making by using boring or cutting machines with rotary cutting tools on a tool-carrier supported by a movable boom by a longitudinally extending boom being pivotable about a vertical and a transverse axis
    • E21D9/1026Making by using boring or cutting machines with rotary cutting tools on a tool-carrier supported by a movable boom by a longitudinally extending boom being pivotable about a vertical and a transverse axis the tool-carrier being rotated about a transverse axis
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/18Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
    • E02F3/20Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels
    • E02F3/205Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels with a pair of digging wheels, e.g. slotting machines
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/10Making by using boring or cutting machines
    • E21D9/1086Drives or transmissions specially adapted therefor

Definitions

  • the invention relates to a rock milling head according to the preamble of the claim 1.
  • Such a rock milling head is known from DE 33 16 840 A1.
  • This Document describes a rock milling head with one on a cantilever or support arm connection attachable housing, it being known here directly or indirectly with the rotary drive in the rear section of the housing connected to store a drive pinion. The case is in the back Section completed by a plate.
  • As a gear connection between The drive pinion and drive spur gear are idler gears mounted in the housing intended. It follows from this document that in front section of the housing with a central drive spur gear connected shafts of the two milling drums in the outer bearing hubs of the Housing are stored. This construction is relatively complex and prone to wear.
  • DE 38 20 264 A1 discloses the housing of a drive arrangement for the cutting heads or rollers of a tunneling or extraction machine to be made in one piece from steel.
  • Rock milling are known for the rest of the tunnel and mining industry where they as adapted to the respective conditions on site, usually with only one rotating Milling head equipped excavation or mining equipment used become. There are also cutting heads with two milling drums known for heavy universal excavator used in the attachment change to digging tools become.
  • a rock milling head is now created in which the interchangeability of parts during repair work, and which ones also has a robust and compact overall structure.
  • the proposed design creates a rock milling head, the Coaxial milling drums on the boom / support arm with a center in between arranged slim gear housing are supported by the large-scale milling work not or only to a negligible extent hindered become. Since the housing is only the one running in a line Pick up gear train from three gears in a row needs, it can be one-piece, narrow or space-saving and torsion-resistant be carried out. Both through the rigidity of the case as well due to the small number of gears housed in it, which act as spur gears can be executed, there is a risk of premature gear wear largely eliminated. In addition, the simple gear links Almost assembled, accessible and replaceable in the housing.
  • the gear housing 1 consists of a one-piece Welded construction, the rear access opening through a releasable mounting cover 11 is closed.
  • the welded construction includes two essentially the same, spaced according to the width of the Gear gears housed in the housing are arranged relative to one another Side plates 2 and their edges connecting surrounding walls 4, the approximately over half the length of the housing starting from the rear section of the housing in at least the circumference of the intermediate gear 22 certain distance parallel to each other and then in each other tapered course around a rounded front end of the housing are.
  • the side plates 2 can be rounded in the area of the tapered front end of the housing through a correspondingly bent intermediate piece 3 be connected to each other, which continues the straight surrounding walls 4.
  • At the rear end of the housing 1 is a widened connection plate 5 attached, the one indicated in Fig. 2 connection bracket 6 of the boom or support arm opposite and one of the cross section of the housing Contains 1 corresponding opening.
  • bearing hubs at the front end of the housing 7 welded for a drum shaft 21, for each milling drum a shaft portion and a reinforced one formed as a drive spur gear 21a Includes middle section.
  • the rear housing section are on the side plates bearing hubs 8 and 9 for a drive pinion 20 Welded shaft 20a.
  • the surrounding walls 4 are in accordance with FIG. 1 in the rear area the housing 1 widened on both sides and there for mutual stiffening connected to the connection plate 5, together with a mudguard 10 a cover for the level of the drive pinion 20 on the outside Side plates 2 connected drive means, e.g. Form engine 18.
  • the housing type described above can be used for Cast part can be taken directly, but without the surrounding walls 4 must be designed as a widened protective cover.
  • a hydraulic radial piston motor 18 flanged with the one supported on tapered roller bearings 34 Shaft 20a of the drive pinion 20 is in drive connection.
  • the bearing hub 8 and the side plate 2 carrying them contain sufficiently large openings for inserting the drive pinion 20 and for receiving a tapered roller bearing 34.
  • the bearing hub 8 is by a screw-on mounting cover 36 closed.
  • the opposite part of the shaft 20a is over an annular collar and a shaft seal in an opening of the left in Fig. 1 Sealed side plate 2 and with a reduced diameter End section in a tapered roller bearing accommodated in the bearing hub 9 34 supported.
  • the tapered roller bearings used in this embodiment 34 take the due to the control play of the radial piston engine 18 occurring axial forces.
  • the larger idler gear 22 of the reduction gear is put together with pre-assembled roller bearings 12 through the rear opening in the Housing 1 inserted and with this on a through mounting holes in the side plates 2 inserted bearing pin 13 mounted.
  • the bearing pin 13 is supported with a reinforced end collar 38 in the right side plate 2 and at the opposite end through a mounting hole closing lid 14 fixed.
  • the intermediate gear 22 is both with the drive pinion 20 and the spur gear 21a of the drum shaft 21 in Intervention.
  • the drum shaft 21 with its unitary central drive spur gear 21a is by the bearing hubs 7 and in their continuation in the side plates 2 contained openings inserted into the housing 1 and by means of tapered roller bearings 17 supported.
  • For fixed positioning of the drum shaft 21 serve outside with the bearing hubs 7 screwed bearing caps 15, in which Shaft seals 16 are provided.
  • the milling drums 25 are each on a spline toothing 23 of the outer drum shaft sections attached and with the help of retaining rings 24 and screwed Caps 26 positioned.
  • Dispensing with planetary gears can be a variety of drive motors with different speeds and torques by one to three-stage planetary gear can be adapted to the milling requirements.

Abstract

Rock cutting head comprising a one-part steel housing attachable to a working machine lug, an electric or hydro motor being attached to the rear portion of the housing and two uni-axial similar cutting drums being provided at its front portion, the rear housing portion, in which a drive pinion directly or indirectly connected to the motor is provided, being terminated toward the lug with a widened connection plate, its front portion supporting outer bearing hubs, in which the shafts of the two cutting drums uniformly connected to a middle drive spur-toothed wheel are provided and wherein a larger intermediate wheel is provided in the housing between drive pinion and drive spur-toothed wheel.

Description

Die Erfindung betrifft einen Gesteinsfräskopf nach dem Oberbegriff des Patentanspruches 1.The invention relates to a rock milling head according to the preamble of the claim 1.

Ein derartiger Gesteinsfräskopf ist aus der DE 33 16 840 A1 bekannt. Diese Druckschrift beschreibt einen Gesteinsfräskopf mit einem an einen Ausleger- oder Tragarm-Anschluß anbaubaren Gehäuse, wobei es hier bekannt ist, im hinteren Abschnitt des Gehäuses direkt oder mittelbar mit dem Drehantrieb verbunden ein Antriebsritzel zu lagern. Das Gehäuse ist im hinteren Abschnitt durch eine Platte abgeschlossen. Als Getriebeverbindung zwischen Antriebsritzel und Antriebsstirnrad sind im Gehäuse gelagerte Zwischenräder vorgesehen. Es ergibt sich aus dieser Druckschrift weiter, daß im vorderen Abschnitt des Gehäuses die mit einem mittleren Antriebsstirnrad verbundenen Wellen der beiden Frästrommeln in äußeren Lagernaben des Gehäuses gelagert sind. Diese Konstruktion ist relativ aufwendig und verschleißanfällig.Such a rock milling head is known from DE 33 16 840 A1. This Document describes a rock milling head with one on a cantilever or support arm connection attachable housing, it being known here directly or indirectly with the rotary drive in the rear section of the housing connected to store a drive pinion. The case is in the back Section completed by a plate. As a gear connection between The drive pinion and drive spur gear are idler gears mounted in the housing intended. It follows from this document that in front section of the housing with a central drive spur gear connected shafts of the two milling drums in the outer bearing hubs of the Housing are stored. This construction is relatively complex and prone to wear.

Aus der DE 38 20 264 A1 ist bekannt, das Gehäuse einer Antriebsanordnung für die Schrämköpfe oder -walzen einer Vortriebs- oder Gewinnungsmaschine einteilig aus Stahl zu bilden.DE 38 20 264 A1 discloses the housing of a drive arrangement for the cutting heads or rollers of a tunneling or extraction machine to be made in one piece from steel.

Gesteinsfräsen sind im übrigen für den Tunnel- und Bergbau bekannt, wo sie als den jeweiligen Bedingungen vor Ort angepaßte, meist mit nur einem rotierenden Fräskopf ausgestattete Vortriebs- oder Abbaugeräte eingesetzt werden. Es sind auch Schneidköpfe mit zwei Frästrommeln bekannt, die für schwere Universalbagger im Anbauwechsel zu Grabwerkzeugen benutzt werden.Rock milling are known for the rest of the tunnel and mining industry where they as adapted to the respective conditions on site, usually with only one rotating Milling head equipped excavation or mining equipment used become. There are also cutting heads with two milling drums known for heavy universal excavator used in the attachment change to digging tools become.

Bei der Konstruktion von Fräsköpfen treten insofern Probleme auf, als die Frästrommel für effektive Vortriebsarbeiten möglichst unbehindert in das anstehende Gestein der Ortsbrust einschneiden können soll, ohne dabei durch ihre Verbindung zum Ausleger der Vortriebsmaschine beeinträchtigt zu sein und ohne diese Verbindung zu gefährden. Um den baulichen Aufwand für lange Kraftübertragungswege und deren Kapselung gering zu halten, ist es außerdem erforderlich, den Antriebsmotor und ein ihm zugeordnetes Reduziergetriebe möglichst nahe der Frästrommel anzuordnen, gleichzeitig aber diese Antriebsmittel gegen äußere Einwirkungen des rauhen Arbeitsbetriebes wirksam zu schützen.Problems arise in the design of milling heads insofar as Milling drum for effective tunneling work as freely as possible in the should be able to cut the existing rock of the working face without doing so affected by their connection to the boom of the tunneling machine to be and without jeopardizing this connection. To the construction effort keep long for long power transmission paths and their encapsulation, it is also necessary to have the drive motor and an associated one Arrange the reduction gear as close as possible to the milling drum, at the same time but these drive means against external influences of the rough work protect effectively.

Zu diesem Zweck ist es bekannt, ein untersetzendes Planetengetriebe direkt in der Frästrommel unterzubringen oder bei einem Schneidkopf mit zwei achsgleichen Frästrommeln deren Antrieb von einem mittig im Anschlußgehäuse angeordneten Hydro- oder Elektromotor mit Hilfe von Kegelrädern umzulenken. Im Hinblick darauf, daß Frästrommeln während ihres Einsatzes bis zum Stillstand belastet und häufig auch mißbräuchlich als Grab- oder Handhabungswerkzeug benutzt werden, führen dabei verursachte Überlastungen zwangsläufig zu vorzeitigen Getriebeschäden. Da insbesondere bei Planetengetrieben alle Zahnräder in gedrängter Anordnung miteinander in Eingriff stehen, genügt schon das Absplittern kleiner Teile eines Lagers oder Zahnes, um das gesamte Getriebe soweit zu zerstören, daß eine Reparatur meistens nicht mehr wirtschaftlich ausgeführt werden kann. Darüber hinaus besteht die Gefahr, daß durch das Einbringen von Kräften, denen zwar ein am Ausleger auswechselbar angebautes Grabwerkzeug standhält, der wesentlich empfindlichere Schneidkopf überbeansprucht und dessen Gehäuse zumindest elastisch verformt wird, wodurch der Kegeltrieb zerstört werden kann.For this purpose, it is known to directly use a step-down planetary gear to accommodate in the milling drum or with a cutting head with two Axial milling drums whose drive from a center in the connection housing arranged hydraulic or electric motor with the help of bevel gears redirect. In view of the fact that milling drums during their use burdened to a standstill and often abusive as a grave or Handling tools are used, cause overloads inevitably leads to premature gearbox damage. Because especially at Planetary gears in a compact arrangement with each other Intervention is enough to split small parts of a bearing or Tooth to destroy the entire gearbox so far that a repair mostly can no longer be carried out economically. Furthermore there is a risk that through the introduction of forces, although a Interchangeably mounted digging tool withstands the essential sensitive cutting head and its housing is at least elastically deformed, thereby destroying the bevel gear can.

Ausgehend von der genannten DE 33 16 840 A1 als nächstkommendem Stand der Technik ist es Aufgabe der Erfindung, einen Gesteinsfräskopf der eingangs bezeichneten Art dahingehend zu verbessern und auszugestalten, daß aus verhältnismäßig wenigen, verschleißarmen und bei Reparaturen einzeln austauschbaren Teilen ein robuster, kompakter Gesamtaufbau kostengünstig herstellbar ist, dessen Gehäuse, Getriebeteile und Lagerungen über die aus dem Schneidbetrieb der Frästrommeln entstehenden Kräfte hinausgehende Beanspruchungen aufzunehmen in der Lage sein sollen, die z.B. bei gelegentlicher Benutzung des Fräskopfes als Grab- oder Schiebewerkzeug auftreten.Starting from the mentioned DE 33 16 840 A1 as the closest State of the art, it is an object of the invention to provide a rock milling head to improve and design the type described at the beginning, that from relatively few, low-wear and individually for repairs replaceable parts a robust, compact overall construction cost-effective can be produced, the housing, gear parts and bearings about the forces arising from the cutting operation of the milling drums Should be able to absorb stresses, e.g. at occasional use of the milling head as a digging or pushing tool occur.

Diese Aufgabe wird gelöst durch einen Gesteinsfräskopf mit den Merkmalen des Patentanspruches 1.This task is solved by a rock milling head with the features of claim 1.

Erfindungsgemäß ist nun ein Gesteinsfräskopf geschaffen, bei dem die Austauschbarkeit von Teilen bei Reparaturarbeiten erleichtert ist, und welche ferner einen robusten und kompakten Gesamtaufbau aufweist.According to the invention, a rock milling head is now created in which the interchangeability of parts during repair work, and which ones also has a robust and compact overall structure.

Mit der vorgeschlagenen Bauform entsteht ein Gesteinsfräskopf, dessen gleichachsige Frästrommeln am Ausleger/Tragarm über ein mittig dazwischen angeordnetes schlankes Getriebegehäuse abgestützt sind, durch das weiträumige Fräsarbeiten nicht oder nur in vernachlässigbarem Umfang behindert werden. Da das Gehäuse lediglich den in einer Linie verlaufenden Getriebezug von drei hintereinander liegenden Zahnrädern aufzunehmen braucht, kann es einteilig, schmal bzw. platzsparend sowie verwindungssteif ausgeführt werden. Sowohl durch die Steifigkeit des Gehäuses als auch durch die geringe Anzahl der darin untergebrachten Zahnräder, die als Stirnräder ausgeführt sein können, wird die Gefahr eines vorzeitigen Getriebeverschleißes weitestgehend beseitigt. Darüber hinaus sind die einfachen Getriebeglieder im Gehäuse leicht montierbar, zugänglich und austauschbar.The proposed design creates a rock milling head, the Coaxial milling drums on the boom / support arm with a center in between arranged slim gear housing are supported by the large-scale milling work not or only to a negligible extent hindered become. Since the housing is only the one running in a line Pick up gear train from three gears in a row needs, it can be one-piece, narrow or space-saving and torsion-resistant be carried out. Both through the rigidity of the case as well due to the small number of gears housed in it, which act as spur gears can be executed, there is a risk of premature gear wear largely eliminated. In addition, the simple gear links Easily assembled, accessible and replaceable in the housing.

Weitere Merkmale und Vorteile des erfindungsgemäßen Gesteinsfräskopfes ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung von in den Zeichnungen dargestellten Ausführungsbeispielen. Es zeigen, jeweils schematisch,

Fig. 1
einen Längsschnitt durch einen Schneidkopf gemäß der Erfindung, der durch einen einzelnen hydraulischen Hochmoment-Motor, z.B. Radialkolbenmotor angetrieben ist,
Fig. 2
eine Seitenansicht des als einteilige Schweißkonstruktion ausgeführten Getriebegehäuses, in der mögliche Frästrommeldurchmesser und eine Ausleger-Anschlußkonsole mit unterbrochenen Linien dargestellt sind,
Fig. 3
einen senkrechten Teilschnitt durch einen Schneidkopf gemäß der Erfindung mit zwei gleichen auf das Antriebsritzel wirkenden hydraulischen Mittelmoment-Motoren z.B. Flügelzellenmotoren, und
Fig. 4
einen vertikalen Teilschnitt durch eine andere Ausführungsform eines Schneidkopfes gemäß der Erfindung mit einem hochtourig drehenden Hydraulikmotor z.B. der Zahnrad- oder Axialkolbenbauart, der durch einen mit unterbrochenen Linien eingezeichneten Elektromotor ersetzt werden kann.
Further features and advantages of the rock milling head according to the invention result from the subclaims and the following description of exemplary embodiments illustrated in the drawings. Each shows schematically
Fig. 1
2 shows a longitudinal section through a cutting head according to the invention, which is driven by a single high-torque hydraulic motor, for example a radial piston motor,
Fig. 2
2 shows a side view of the transmission housing, which is designed as a one-piece welded construction, in which possible milling drum diameters and a boom connection bracket are shown with broken lines,
Fig. 3
a vertical partial section through a cutting head according to the invention with two identical hydraulic medium torque motors acting on the drive pinion, for example vane-cell motors, and
Fig. 4
a partial vertical section through another embodiment of a cutting head according to the invention with a high-speed rotating hydraulic motor, for example, the gear or axial piston type, which can be replaced by an electric motor shown with broken lines.

Entsprechend Fig. 1 und 2 besteht das Getriebegehäuse 1 aus einer einteiligen Schweißkonstruktion, dessen rückwärtige Zugangsöffnung durch einen lösbaren Montagedeckel 11 verschlossen ist. Die Schweißkonstruktion umfaßt zwei im wesentlichen gleiche, im Abstand entsprechend der Breite der im Gehäuse untergebrachten Getriebezahnräder zueinander angeordnete Seitenplatten 2 sowie deren Ränder verbindende Umfassungswände 4, die etwa über die vom hinteren Abschnitt des Gehäuses ausgehenden halbe Gehäuselänge in einem mindestens durch den Umfang des Zwischenrades 22 bestimmten Abstand zueinander parallel verlaufen und danach in zueinander verjüngendem Verlauf um ein abgerundetes vorderes Gehäuseende geführt sind. Die Seitenplatten 2 können im Bereich des verjüngten abgerundeten vorderen Gehäuseendes durch ein entsprechend gebogenes Zwischenstück 3 miteinander verbunden sein, das die geraden Umfassungswände 4 fortsetzt. Am rückwärtigen Ende des Gehäuses 1 ist eine verbreiterte Anschlußplatte 5 befestigt, die einer in Fig. 2 angedeuteten Anschlußkonsole 6 des Auslegers oder Tragarms gegenüberliegt und eine dem Querschnitt des Gehäuses 1 entsprechende Öffnung enthält.1 and 2, the gear housing 1 consists of a one-piece Welded construction, the rear access opening through a releasable mounting cover 11 is closed. The welded construction includes two essentially the same, spaced according to the width of the Gear gears housed in the housing are arranged relative to one another Side plates 2 and their edges connecting surrounding walls 4, the approximately over half the length of the housing starting from the rear section of the housing in at least the circumference of the intermediate gear 22 certain distance parallel to each other and then in each other tapered course around a rounded front end of the housing are. The side plates 2 can be rounded in the area of the tapered front end of the housing through a correspondingly bent intermediate piece 3 be connected to each other, which continues the straight surrounding walls 4. At the rear end of the housing 1 is a widened connection plate 5 attached, the one indicated in Fig. 2 connection bracket 6 of the boom or support arm opposite and one of the cross section of the housing Contains 1 corresponding opening.

Außen mit den Seitenplatten 2 sind am vorderen Ende des Gehäuses Lagernaben 7 für eine Trommelwelle 21 verschweißt, die für jede Frästrommel einen Wellenabschnitt und einen als Antriebsstirnrad 21a ausgebildeten verstärkten Mittelabschnitt umfaßt. Im rückwärtigen Gehäuseabschnitt sind an den Seitenplatten Lagernaben 8 und 9 für eine das Antriebsritzel 20 tragende Welle 20a angeschweißt.Outside with the side plates 2 are bearing hubs at the front end of the housing 7 welded for a drum shaft 21, for each milling drum a shaft portion and a reinforced one formed as a drive spur gear 21a Includes middle section. In the rear housing section are on the side plates bearing hubs 8 and 9 for a drive pinion 20 Welded shaft 20a.

Die Umfassungswände 4 sind entsprechend Fig. 1 im hinteren Bereich über das Gehäuse 1 beidseitig verbreitert und dort zu gegenseitiger Versteifung mit der Anschlußplatte 5 verbunden, um zusammen mit einem Schutzblech 10 eine Abdeckung für die in Höhe des Antriebsritzels 20 außen an den Seitenplatten 2 angeschlossene Antriebsmittel, z.B. Motor 18 zu bilden. Im Fall einer Gußkonstruktion kann die vorbeschriebene Gehäusebauart für ein Gußformteil direkt übernommen werden, ohne daß jedoch dabei die Umfassungswände 4 als verbreiterte Schutzabdeckung ausgebildet sein müssen.The surrounding walls 4 are in accordance with FIG. 1 in the rear area the housing 1 widened on both sides and there for mutual stiffening connected to the connection plate 5, together with a mudguard 10 a cover for the level of the drive pinion 20 on the outside Side plates 2 connected drive means, e.g. Form engine 18. in the In the case of a cast construction, the housing type described above can be used for Cast part can be taken directly, but without the surrounding walls 4 must be designed as a widened protective cover.

Im Beispiel von Fig. list an die Lagernabe 9 ein hydraulischer Radialkolbenmotor 18 angeflanscht, der mit der auf Kegelrollenlagern 34 abgestützten Welle 20a des Antriebsritzels 20 in Antriebsverbindung steht. Die Lagernabe 8 und die sie tragende Seitenplatte 2 enthalten ausreichend große Öffnungen zum Einführen des Antriebsritzels 20 sowie zur Aufnahme eines Kegelrollenlagers 34. Die Lagernabe 8 ist durch einen verschraubbaren Montagedeckel 36 verschlossen. Der gegenüberliegende Teil der Welle 20a ist über einen Ringbund und eine Wellendichtung in einer Öffnung der in Fig. 1 linken Seitenplatte 2 abgedichtet und mit einem im Durchmesser reduzierten Endabschnitt in einem in der Lagernabe 9 aufgenommenen Kegelrollenlager 34 abgestützt. Die bei diesem Ausführungsbeispiel angewendeten Kegelrollenlager 34 nehmen die aufgrund des Steuerspiels des Radialkolbenmotors 18 auftretenden Axialkräfte auf.In the example of Fig. List on the bearing hub 9, a hydraulic radial piston motor 18 flanged with the one supported on tapered roller bearings 34 Shaft 20a of the drive pinion 20 is in drive connection. The bearing hub 8 and the side plate 2 carrying them contain sufficiently large openings for inserting the drive pinion 20 and for receiving a tapered roller bearing 34. The bearing hub 8 is by a screw-on mounting cover 36 closed. The opposite part of the shaft 20a is over an annular collar and a shaft seal in an opening of the left in Fig. 1 Sealed side plate 2 and with a reduced diameter End section in a tapered roller bearing accommodated in the bearing hub 9 34 supported. The tapered roller bearings used in this embodiment 34 take the due to the control play of the radial piston engine 18 occurring axial forces.

Das größere Zwischenrad 22 des Untersetzungsgetriebes wird zusammen mit vormontierten Rollenlagern 12 durch die rückwärtige Öffnung in das Gehäuse 1 eingeführt und mit diesen auf einem durch Montageöffnungen in den Seitenplatten 2 eingeführten Lagerbolzen 13 gelagert. Der Lagerbolzen 13 ist mit einem verstärkten Endbund 38 in der rechten Seitenplatte 2 abgestützt und am gegenüberliegenden Ende durch einen die Montageöffnung verschließenden Deckel 14 fixiert. Das Zwischenrad 22 steht sowohl mit dem Antriebsritzel 20 als auch mit dem Stirnrad 21a der Trommelwelle 21 in Eingriff.The larger idler gear 22 of the reduction gear is put together with pre-assembled roller bearings 12 through the rear opening in the Housing 1 inserted and with this on a through mounting holes in the side plates 2 inserted bearing pin 13 mounted. The bearing pin 13 is supported with a reinforced end collar 38 in the right side plate 2 and at the opposite end through a mounting hole closing lid 14 fixed. The intermediate gear 22 is both with the drive pinion 20 and the spur gear 21a of the drum shaft 21 in Intervention.

Die Trommelwelle 21 mit ihrem einheitlichen mittleren Antriebsstirnrad 21a wird durch die Lagernaben 7 und die in deren Fortsetzung in den Seitenplatten 2 enthaltenen Öffnungen in das Gehäuse 1 eingeführt und mittels Kegelrollenlagern 17 abgestützt. Zur festen Positionierung der Trommelwelle 21 dienen außen mit den Lagernaben 7 verschraubbare Lagerdeckel 15, in denen Wellendichtungen 16 vorgesehen sind. Die Frästrommeln 25 sind jeweils auf eine Keilwellenverzahnung 23 der äußeren Trommelwellenabschnitte aufgesteckt und mit Hilfe von Halteringen 24 sowie verschraubten Verschlußdeckeln 26 lagemäßig positioniert.The drum shaft 21 with its unitary central drive spur gear 21a is by the bearing hubs 7 and in their continuation in the side plates 2 contained openings inserted into the housing 1 and by means of tapered roller bearings 17 supported. For fixed positioning of the drum shaft 21 serve outside with the bearing hubs 7 screwed bearing caps 15, in which Shaft seals 16 are provided. The milling drums 25 are each on a spline toothing 23 of the outer drum shaft sections attached and with the help of retaining rings 24 and screwed Caps 26 positioned.

Die Frästrommeln 25, deren mögliche Maximal- und Mindestdurchmesser z.B. für Weichgestein bzw. Hartgestein in Fig. 1 mit unterbrochenen Linien angedeutet sind, werden je nach Material und Trommeldurchmesser mit Drehzahlen zwischen etwa 40 und 60 U/min angetrieben. Da die Übersetzung mit den Stirnrädern im Gehäuse 1 zwischen etwa 1:1,5 bis 1:2 beträgt, dreht der im Beispiel von Fig. 1 angewendete Hochmomentmotor 18 mit etwa 100 U/min. Wird als Antrieb ein Elektromotor verwendet, der bei 50 Hz-Wechselstrom mit 1500 U/min dreht, ist ein Gesamtübersetzungsverhältnis von ca. 1500/50 = 30 erforderlich, weshalb im Fall des in Fig. 4 dargestellten Beispiels das angebaute Planetengetriebe 32 eine Übersetzung i von 30/1,5 = 20 erreichen und folglich zweistufig ausgeführt sein muß.The milling drums 25, their possible maximum and minimum diameters e.g. for soft rock or hard rock in Fig. 1 with broken lines are indicated, depending on the material and drum diameter Speeds between about 40 and 60 rpm driven. Because the translation with the spur gears in the housing 1 is between about 1: 1.5 to 1: 2, the high-torque motor 18 used in the example of FIG. 1 rotates approximately 100 rpm. If an electric motor is used as the drive, at 50 Hz alternating current rotating at 1500 rpm is a total gear ratio 1500/50 = 30 is required, which is why in the case of the one shown in FIG For example, the attached planetary gear 32 a translation i from 30 / 1.5 = 20 and must therefore be carried out in two stages.

Bei den Ausführungsbeispielen gemäß Fig. 3 und 4 sind normale Kugellager verwendbar, da keine Axialkräfte auftreten. Dies ergibt sich in Fig. 3 aufgrund von zwei gegenüberliegend an die Welle 20a des Antriebsritzels 20 angeschlossenen gleichen hydraulischen Mittelmoment-Motoren 19, deren Gehäuse mit den Lagernaben 8, 9 verschraubt sind. Gemäß Fig. 4 ist an einen relativ hochtourig drehenden Hydraulikmotor 31 der Axialkolbenbauart oder an einen Elektromotor 30 eine Zwischenwelle 28 angeschlossen, die durch eine zentrische Bohrung der Antriebsritzelwelle 20a verläuft und mit dem Sonnenrad 29 des zweistufigen Planetengetriebes 32 in Verbindung steht, dessen Abtriebs-Planetenträger 33 direkt auf eine Keilwellenverzahnung 40 der Welle 20a aufgesteckt ist. Durch Verwendung der gezeigten preisgünstigen Kugellager mit großen Innendurchmesser behält das Antriebsritzel 20 und dessen Welle 20a trotz deren Durchgangsbohrung die volle Stabilität.3 and 4 are normal ball bearings can be used because no axial forces occur. This results in Fig. 3 due to of two opposite to the shaft 20a of the drive pinion 20 connected same hydraulic medium torque motors 19, whose Housing is screwed to the bearing hubs 8, 9. 4 is to one relatively high-speed rotating hydraulic motor 31 of the axial piston type or connected to an electric motor 30, an intermediate shaft 28, the runs through a central bore of the drive pinion shaft 20a and with the sun gear 29 of the two-stage planetary gear 32 in connection stands, the output planet carrier 33 directly on a spline toothing 40 of the shaft 20a is attached. By using the shown The drive pinion retains inexpensive ball bearings with a large inner diameter 20 and its shaft 20a despite the through hole full stability.

Die in Fig. 3 und 4 gezeigten Antriebsvarianten bieten weite Möglichkeiten zur Anpassung des Fräskopfes an die verschiedensten Trägermaschinen oder -fahrzeuge. Ohne das robuste Stirnradgetriebe zu verändern oder auf Möglichkeiten etwa erforderlich werdender Reparaturen an einem zusätzlich benötigten Planetengetrieben zu verzichten, kann eine Vielzahl von Antriebsmotoren mit verschiedensten Drehzahlen und Drehmomenten durch ein- bis dreistufige Planetengetriebe an die Fräserfordernisse angepaßt werden.The drive variants shown in FIGS. 3 and 4 offer wide possibilities to adapt the milling head to a wide variety of carrier machines or -vehicles. Without changing the robust spur gear or on possibilities repairs to an additional one that may become necessary Dispensing with planetary gears can be a variety of drive motors with different speeds and torques by one to three-stage planetary gear can be adapted to the milling requirements.

Claims (10)

  1. Rock cutting head comprising a housing attachable to an extension arm or lug of a working machine, in which housing a toothed wheel step-down gear unit connected with a rotational drive and provided for two similar cutting drums rotating on shafts in axial alignment with oneanother is arranged and encapsulated, wherein a drive pinion (20) connected directly or indirectly to the rotational drive is arranged in the rear portion of the housing and the housing is terminated towards the extension arm by a connecting plate (5) and extended to a front portion provided on opposite sides with outer bearing hubs (8, 9), in which the shafts (21) of the cutting drums are arranged, the shafts being uniformly connected to a middle spur-toothed wheel (21a),
    characterized in that the housing is provided as a slender, one-piece steel or cast steel gear housing (1) extending between the uni-axial cutting drums, in which three toothed wheels arranged in a line one behind the other are provided, that as gear connection between drive pinion (20) and drive spur-toothed wheel (21a) an intermediate wheel (22) with a larger diameter than the toothed wheels (20, 21a) is provided, that the connecting plate (5) is provided with a greater width relative to the housing, that the gear components are mountable and demountable in a known manner via openings provided in the housing and closable by means of lids (11, 14, 26, 36), and that a hydraulic motor (18) directly driving the drive pinion (20) is provided.
  2. Rock cutting head according to claim 1, characterized in that the housing (1) comprises two side plates or side walls (2) arranged in spaced relation to one another according to the width of the toothed wheels (20, 21a, 22) of the gear, as well as surrounding walls (3, 4) connecting the edges thereof, the surrounding walls extending parallely to one another in the rear housing portion with a minimal spacing defined by the circumference of the intermediate wheel (22) and, in the area of the front housing portion, while extending in a tapered manner, being connected to the front housing end corresponding essentially to the circumference of the outer bearing hubs (7).
  3. Rock cutting head according to claim 1 or 2, characterized in that the toothed wheels of the step-down gear unit as well as corresponding bearings and bearing necks or bearing studs are insertable and assemblable in the one-part housing via respectively corresponding openings provided in the side walls and the rear sided connecting plate and closeable via lids (8a, 11, 14).
  4. Rock cutting head according to claim 3, characterized in that the intermediate wheel (22) is, together with bearing means (12) pre-assembled in the intermediate wheel body, insertable into the housing (1) via the opening of the connecting plate (5), wherein a bearing stud (13) supporting the bearing means is insertable via a side plate opening and fixable therein by means of a closing lid (14).
  5. Rock cutting head according to any one of the preceding claims, characterized in that the surrounding walls (4), essentially in the area of the rear housing portion, project from the housing width at both sides and are connected to the connecting plate (5) in order to achieve a stiffening and are provided as guard cover for actuation means (10; 19; 31, 32) connected to the outside of the housing at the level of the drive pinion.
  6. Rock cutting head according to any one of the preceding claims, characterized in that as drive means two similar hydraulic medium moment motors (19) are connected from opposing sides of the housing (1) to extended bearing studs of drive pinion (20).
  7. Rock cutting head according to any one of the claims 1 to 5, characterized in that a drive motor (30; 31) is flange-mounted on one side of the housing (1), and a step-down, especially planetary gear (32) is flange-mounted to the opposite side, the output elements or output planetary carrier of which being connected to a bearing stud of the drive pinion (20), and the input element or sun wheel (29) of which being connected via a connecting shaft (28) extending through a centrical bore in the drive pinion shaft to the drive motor.
  8. Rock cutting head according to claim 7, characterized in that the drive motor (30) is a high speed hydraulic motor.
  9. Rock cutting head according to any one of the preceding claims, characterized in that the cutting drums (25) are attachable, respectively by means of a centrical bore, to the connecting ends (23) of shaft (21) projecting from bearing hubs (7) arranged in the front housing portion and are respectively fixable via a screwable closing lid (26).
  10. Rock cutting head according to claim 9, characterized in that the connecting ends (23) of shaft (21) comprise a spline shaft toothing.
EP97118802A 1996-11-06 1997-10-29 Rock milling head Expired - Lifetime EP0841467B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19645650 1996-11-06
DE19645650A DE19645650C1 (en) 1996-11-06 1996-11-06 Rock face cutting head

Publications (2)

Publication Number Publication Date
EP0841467A1 EP0841467A1 (en) 1998-05-13
EP0841467B1 true EP0841467B1 (en) 2000-07-05

Family

ID=7810748

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97118802A Expired - Lifetime EP0841467B1 (en) 1996-11-06 1997-10-29 Rock milling head

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US (1) US6158818A (en)
EP (1) EP0841467B1 (en)
JP (1) JPH10196284A (en)
AT (1) ATE194409T1 (en)
DE (2) DE19645650C1 (en)

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EP1183440B1 (en) * 1999-06-08 2004-08-11 VOEST-ALPINE Bergtechnik Gesellschaft m.b.H Stone head to be mounted on excavator arms
DE10041275B4 (en) * 2000-08-23 2006-07-27 Firma Klaus Ertmer Maschinenbautechnologie Milling system for attachment to hydraulic carrier equipment
ITBO20010632A1 (en) * 2001-10-16 2003-04-16 Simex Engineering S R L HYDRAULIC MILLING MACHINE FOR EXCAVATOR MACHINES
CN100532784C (en) * 2007-03-13 2009-08-26 郝忠文 Driving head for entry-driving machine
DE102011108016A1 (en) * 2011-07-19 2013-01-24 Liebherr-Components Biberach Gmbh Self-propelled surface milling cutter
US8864621B2 (en) * 2012-05-30 2014-10-21 Fairfield Manufacturing Company, Inc. Roadheader gearbox
CN102691501B (en) * 2012-06-14 2014-06-11 三一重型装备有限公司 Tunneling machine and cutting part thereof
CN103243755B (en) * 2013-05-11 2016-02-03 山西东华机械有限公司 Dintheader bearing adds gear ring type turntable
EP2821589B1 (en) * 2013-07-04 2015-10-28 Sandvik Intellectual Property AB Mining machine cutting head drive assembly
CN103759049B (en) * 2014-01-15 2015-12-09 常林股份有限公司 Cutting arm of tunneling machine
CN104912568B (en) * 2015-06-17 2017-07-04 唐忠盛 Dither transverse direction milling is dug head and the milling digging machine and development machine of head is dug with the milling
CN109736826B (en) * 2019-01-10 2020-08-07 河南理工大学 Broken cylinder of digging for ground broken machine of digging
DE202019102438U1 (en) * 2019-02-21 2020-05-25 Liebherr-Components Biberach Gmbh Milling arrangement for a trench cutter
US11761333B2 (en) 2020-11-16 2023-09-19 Joy Global Underground Mining Llc Cutting assembly for longwall mining system
CN112576270A (en) * 2020-12-08 2021-03-30 李国平 Multi-motor milling and excavating mechanism

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Also Published As

Publication number Publication date
DE19645650C1 (en) 1998-01-22
JPH10196284A (en) 1998-07-28
DE59701966D1 (en) 2000-08-10
ATE194409T1 (en) 2000-07-15
EP0841467A1 (en) 1998-05-13
US6158818A (en) 2000-12-12

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