EP0112408A1 - Clearing plate for a shearer drum - Google Patents

Clearing plate for a shearer drum Download PDF

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Publication number
EP0112408A1
EP0112408A1 EP82112055A EP82112055A EP0112408A1 EP 0112408 A1 EP0112408 A1 EP 0112408A1 EP 82112055 A EP82112055 A EP 82112055A EP 82112055 A EP82112055 A EP 82112055A EP 0112408 A1 EP0112408 A1 EP 0112408A1
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EP
European Patent Office
Prior art keywords
cutting
blade
roller
proximity switch
scraper roller
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Granted
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EP82112055A
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German (de)
French (fr)
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EP0112408B1 (en
Inventor
Bernhard Schneider
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Individual
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Individual
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Priority to EP19820112055 priority Critical patent/EP0112408B1/en
Priority to DE8282112055T priority patent/DE3271481D1/en
Publication of EP0112408A1 publication Critical patent/EP0112408A1/en
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Publication of EP0112408B1 publication Critical patent/EP0112408B1/en
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/04—Safety devices
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F9/00—Devices preventing sparking of machines or apparatus

Definitions

  • the invention relates to a scraper roller clearing blade according to the preamble of patent claim 1.
  • the hard coal to be extracted in underground mining is currently primarily cut using cutting machines, which are used for this purpose and which are equipped with one or two cutting rollers, are slid or rolled alongside the face conveyor on the butt and old-sided conveyor attachments.
  • the core cutter bodies are provided with three to six, thread-like gears, depending on the cutter roller 0, the surfaces of which are equipped with cutter chisels.
  • the coal is broken up by this cutting chisel and discharged towards the face conveyor by the previously described design of the cutting roller.
  • the circular-shaped clearing blade is screwed onto a clearing blade holder at a certain distance from the chisel tips of the cutting rollers.
  • This dozer blade holder is divided and surrounds the planet carrier housing in a ring shape so that it can be pivoted together with the dozer blade around the cutting roller.
  • the dozer blade When cutting, the dozer blade must always be behind the cutting roller in the cutting direction. If the cutting direction is changed, the dozer blade with the dozer blade holder must be swiveled into the correct position around the cutting roller.
  • the dozer blade Due to the arrangement of the dozer blade, firstly the transport effect of the cutting roller is increased, secondly, through the dozer blade, the scraped material loosened by the cutting roller is prevented from accumulating dust in the work area, and thirdly, the clearing blade scraping over the sole due to its own weight cleans this in such a way that the return process of the face conveyor with the face building units to be tightened is made considerably easier.
  • the dozer blade holder Due to the angular arrangement of the dozer blade and dozer blade holder, which can form a large lever arm with the appropriate cutting roller diameter, the dozer blade holder is subjected to very high bending forces. This is particularly the case when the swiveling process described under 2 is carried out. It can also happen that the clearing blade located under the cutting roller only sits on a mountain boulder or fallen cutting material in the deepest part of the cutting. It is even more unfavorable if, without swiveling the dozer blade, the cutting direction is changed at short notice, for example to allegedly deal better with an accident. In the aforementioned cases, there are so high bending forces in the snow blade holder that it is deformed.
  • the invention is based on the object of all damage which may occur as a result of an unintentional contact of the clearing blade with the cutting roller or its cutting bit and even to prevent these contacts themselves and to remove damage to the clearing blade once quickly and inexpensively.
  • the advantages achieved by the invention are, in particular, that damage to the cutting chisel is avoided or insignificant due to the design of the clearing blade and its additional devices, that a repair can be carried out with little effort in a short time and, above all, that friction-related local overheating and Sparking that could trigger a firedamp explosion can be safely avoided.
  • the cutting machine 1 shown schematically in the drawing can be moved on the butt-side 2 and old-side 3 attachments of the face conveyor 4.
  • the cutting roller 5, also shown here schematically, without a cutting chisel, is attached to the non-visible roller connection flange via the planet carrier housing 6 of the roller support arm 7.
  • the circular blade-shaped or similarly designed clearing blade 8, which must always be in the cutting direction behind the cutting roller 5 in the working position, is detachably attached to the clearing blade holder 9.
  • the clearing blade 8 was divided according to the invention approximately two-thirds of its depth by a quick-release connection. As a result, only the outer part of the dozer blade 8 and the bent part of the dozer blade holder 9, which is also split, need be replaced in the future.
  • a proximity switch 12 which triggers an optical or acoustic signal 11 in the event of a collision and / or switches off the drive of the cutting roller 5.
  • This Proximity switch 12 is arranged in a corresponding recess in the clearing blade and is covered on the side facing the cutting roller 5 by a radiation-permeable cap or the like.
  • the inside of the clearing blade is completely or partially covered with a non-sparking material, such as non-ferrous metal, plastic or the like, or made entirely from this material.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

1. Clearing plate for a shearer drum principally designed in the shape of a circular arc and attached, in a detachable way, to the clearing plate holder (9) designed to swivel around the axis of the shearer drum (5), characterized in that it consists, partially or wholly, of a non-sparking material such as a nonferrous metal, plastic or similar material with its inner side coated with this material, in that a part on the opposite side of the coal cutting machine (1) is attached to the remaining part in an exchangeable way and in that it is equipped with a proximity switch (12) triggering a signal and/or putting the drive of the shearer drum (5) out of circuit.

Description

Die Erfindung betrifft ein Schrämwalzen-Räumschild gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a scraper roller clearing blade according to the preamble of patent claim 1.

Die im Untertage-Bergbau zu gewinnende Steinkohle wird derzeit vornehmlich schneident mittels Schrämmaschinen abgebaut.Die hierfür verwendeten Schrämmaschinen, die mit einer oder zwei Schrämwalzen ausgerüstet sind, werden über oder stoßseitig - neben dem Strebförderer an den Stoß- und altseitigen Förderanbauten gleitend oder rollend verfahren. Die Schrämwalzengrundkörper sind mit drei bis sechs, je nach dem Schrämwalzen-0 mehr oder weniger hohen, gewindeähnlichen Gängen versehen, deren Oberflächen mit Schrämmeißeln bestückt sind. Die Kohle wird durch diese Schrämmeißel losgebrochen und durch die vorher beschriebene Bauform der Schrämwalze in Richtung Strebförderer ausgetragen. Das kreisbogenförmige Räumschild ist, in einem bestimmten Abstand zu den Meißelspitzen der Schrämwalzen, an einen Räumschildhalter angeschraubt. Dieser Räumschildhalter ist geteilt und umgreift ringförmig das Planetenträgergehäuse so, daß es in einer Führung mitsamt dem Räumschild um die Schrämwalze verschwenkt werden kann. Beim Schrämen muß das Räumschild immer, in Schrämrichtung, hinter der Schrämwalze stehen. Wird die Schrämrichtung geändert, muß das Räumschild mit dem Räumschildhalter um die Schrämwalze in die richtige Stellung geschwenkt werden. Bedingt durch die Anordnung des Räumschildes wird, erstens die Transportwirkung der Schrämwalze erhöht, zweitens durch das Räumschild das Wegschleudern des durch die Schrämwalze gelösten Schrämgutes verhindert gleichzeitig der Staubanfall im Arbeitsbereich vermindert, und drittens säubert das, beim Sohlschnitt infolge seines Eigengewichts über die Sohle schrappende Räumschild diese so, daß der Rückvorgang des Strebförderers mit den nachzuziehenden Strebausbaueinheiten erheblich erleichtert wird.The hard coal to be extracted in underground mining is currently primarily cut using cutting machines, which are used for this purpose and which are equipped with one or two cutting rollers, are slid or rolled alongside the face conveyor on the butt and old-sided conveyor attachments. The core cutter bodies are provided with three to six, thread-like gears, depending on the cutter roller 0, the surfaces of which are equipped with cutter chisels. The coal is broken up by this cutting chisel and discharged towards the face conveyor by the previously described design of the cutting roller. The circular-shaped clearing blade is screwed onto a clearing blade holder at a certain distance from the chisel tips of the cutting rollers. This dozer blade holder is divided and surrounds the planet carrier housing in a ring shape so that it can be pivoted together with the dozer blade around the cutting roller. When cutting, the dozer blade must always be behind the cutting roller in the cutting direction. If the cutting direction is changed, the dozer blade with the dozer blade holder must be swiveled into the correct position around the cutting roller. Due to the arrangement of the dozer blade, firstly the transport effect of the cutting roller is increased, secondly, through the dozer blade, the scraped material loosened by the cutting roller is prevented from accumulating dust in the work area, and thirdly, the clearing blade scraping over the sole due to its own weight cleans this in such a way that the return process of the face conveyor with the face building units to be tightened is made considerably easier.

Das Verschwenken eines Räumschildes kann auf zwei verschiedene Arten erfolgen:

  • 1. mittels einer am Walzentragarm angeordneten hydraulischen Schwenkvorrichtung, die am Räumschildhalter angreift und das Räumschild nach oben, um die Schrämwalzenachse in den freien Raum verschwenkt, oder
  • 2. beim Hochschwenken des Walzentragarms um ein Gelenk am Walzenkopfgetriebe, was über innere oder äußere Schwenkzylinder erfolgen kann, fällt das Räumschild durch.sein Eigengewicht nach unten in den Freiraum unter der Schrämwalze und setzt sich dort auf die Sohle auf. Durch Verfahren der Schrämmaschine in eine neue Richtung und gleichzeitiges langsames Herunterschwenken der Schrämwalze dreht sich der Räumschildhalter in seiner Führung so, daß die Schrämwalze, nach einigen Metern Fahrt, mit ihren unteren Meißelspitzen auf der Sohle und das Räumschild in seiner richtigen Stellung hinter der Schrämwalze steht.
There are two different ways of pivoting a dozer blade:
  • 1. by means of a hydraulic swivel device arranged on the roller support arm, which engages on the dozer blade holder and swings the dozer blade upward about the cutting roller axis into the free space, or
  • 2. When the roller support arm is swiveled up around a joint on the roller head gear, which can be done via inner or outer swivel cylinders, the clearing blade falls through. By moving the cutting machine in a new direction and at the same time slowly swiveling the cutting roller down, the dozer blade holder rotates in its guide so that, after a few meters of travel, the cutting blade with its lower chisel tips on the sole and the cutting blade is in its correct position behind the cutting roller .

Durch die winkelförmige Anordnung von Räumschild und Räumschildhalter, der bei entsprechendem Schrämwalzen-Durchmesser einen großen Hebelarm bilden kann, wird der Räumschildhalter durch sehr hohe Biegekräfte beansprucht. Dies ist insbesondere dann der Fall, wenn der unter 2. beschriebene Schwenkvorgang durchgeführt wird. Es kann dabei auch vorkommen, daß sich das unter der Schrämwalze liegende Räumschild nur im Schrämtiefsten auf einem Bergebrocken oder nachgefallenen Schrämgut aufsetzt. Noch ungünstiger wirkt es sich aus, wenn,ohne das Räumschild zu schwenken, die Schrämrichtung kurzfristig geändert wird, um z.B. einen Nachfall vermeintlich besser bewältigen zu können. Bei den vorgenannten Fällen ergeben sich in dem Räumschildhalter so hohe Biegekräfte, daß es zu dessen Verformung kommt. Diese können so erheblich sein, daß insbesondere der im Schrämtiefsten befindliche, äußerste Teil des Räumschildes mit den äußersten Schrämmeißeln der Schrämwalze in Berührung kommt. Dadurch ergeben sich zwangsläufig Beschädigungen des Räumschildes, weil die Schrämmeißel tiefe Rillen in die Blechbeplankung dieses Räumschildteils fräsen. Diese Beschädigungen des Räumschildes zwangen bisher nicht nur zu einem ziemlich aufwendigen Auswechseln desselben und auch gegebenenfalls zum Wechseln des Räumschildhalters, sondern es waren damit, besonders im Untertagebetrieb, auch gefährliche Sicherheitsrisiken verbunden. Durch die Reibung von Stahl auf Stahl kam es nämlich zu starken Erhitzungen und sogar zu Funkenbildungen, die beide eine Schlagwetterexplosion auslösen könnten.Due to the angular arrangement of the dozer blade and dozer blade holder, which can form a large lever arm with the appropriate cutting roller diameter, the dozer blade holder is subjected to very high bending forces. This is particularly the case when the swiveling process described under 2 is carried out. It can also happen that the clearing blade located under the cutting roller only sits on a mountain boulder or fallen cutting material in the deepest part of the cutting. It is even more unfavorable if, without swiveling the dozer blade, the cutting direction is changed at short notice, for example to allegedly deal better with an accident. In the aforementioned cases, there are so high bending forces in the snow blade holder that it is deformed. These can be so considerable that in particular the outermost part of the clearing blade, which is located in the deepest part of the blade, comes into contact with the outermost cutting bits of the cutting roller. This inevitably results Damage to the dozer blade because the cutter chisel cuts deep grooves in the sheet metal of this dozer blade part. So far, this damage to the dozer blade has not only forced it to be replaced in a rather complex manner and possibly also to change the dozer blade holder, but it also entailed dangerous safety risks, particularly in underground operation. The friction from steel to steel caused excessive heating and even sparking, both of which could trigger a firedamp explosion.

Der Erfindung liegt die Aufgabe zu Grunde, alle Schäden, die durch eine ungewollte Berührung des Räumschildes mit der Schrämwalze bzw. deren Schrämmeißel auftreten können und sogar auch diese Berührungen selbst zu verhindern und einmal erfolgte Beschädigungen des Räumschildes schnell und kostengünstig zu beseitigen.The invention is based on the object of all damage which may occur as a result of an unintentional contact of the clearing blade with the cutting roller or its cutting bit and even to prevent these contacts themselves and to remove damage to the clearing blade once quickly and inexpensively.

Diese Aufgabe wurde gelöst durch die Ausbildung und Ausstattung des Räumschildes gemäß den Merkmalen des Patentanspruchs 1.This object was achieved by the design and equipment of the snow plow according to the features of patent claim 1.

Weitere vorteilhafte Ausgestaltungen des Räumschildes sind in den Patentansprüchen 2 bis 4 erläutert.Further advantageous embodiments of the dozer blade are explained in claims 2 to 4 .

Die mit der Erfindung erreichten Vorteile bestehen insbesondere darin, daß durch die Ausbildung des Räumschildes und seiner Zusatzeinrichtungen eine Beschädigung durch die Schrämmeißel vermieden oder unwesentlich wird, eine anfallende Reparatur mit geringem Aufwand in kurzer Zeit durchgeführt werden kann und vor allem, daß reibungsbedingte örtliche Überhitzungen und Funkenbildungen, die eine Schlagwetterexplosion auslösen könnten, sicher vermieden werden.The advantages achieved by the invention are, in particular, that damage to the cutting chisel is avoided or insignificant due to the design of the clearing blade and its additional devices, that a repair can be carried out with little effort in a short time and, above all, that friction-related local overheating and Sparking that could trigger a firedamp explosion can be safely avoided.

Die Zeichnung erläutert den Erfindungsgegenstand an Ausführungsbeispielen.The drawing explains the subject of the invention using exemplary embodiments.

Es zeigt:

  • Fig. 1 eine schematische Darstellung eines Walzenarmes mit der Schrämwalze, den Räumschildhalter und das Räumschild in der Seitenansicht.
  • Fig. 2 dieselbe Anornung in der Draufsicht,
  • Fig. 3 ein Räumschild in der Seitenansicht,
  • Fig. 4 ein Schnittbild des Räumschildes mit eingebautem Annäherungsschalter.
It shows:
  • Fig. 1 is a schematic representation of a roller arm with the cutting roller, the dozer blade holder and the dozer blade in a side view.
  • 2 the same arrangement in plan view,
  • 3 is a side view of a dozer blade,
  • Fig. 4 is a sectional view of the dozer with built-in proximity switch.

Die in der Zeichnung schematisch dargestellte Schrämmaschine 1 ist auf den stoßseitigen 2 und altseitigen 3 Anbauten des Strebförderers 4 verfahrbar. Die hier ebenfalls schematisch, ohne Schrämmeißel, dargestellte Schrämwalze 5 ist über das Planetenträgergehäuse 6 des Walzentragarms 7 am nicht sichtbaren Walzenanschlußflansch befestigt. Das kreisbogenförmig oder ähnlich ausgebildete Räumschild 8, das in Arbeitsstellung immer in Schrämrichtung hinter der Schrämwalze 5 stehen muß, ist am Räumschildhalter 9 lösbar befestigt. Der Räumschildhalter 9, der geteilt, ringförmig die nicht sichtbare Führung auf dem Planetenträgergehäuse 6 des Walzentragarms 7 umgreift, schwenkt das Räumschild 8, wie oben beschrieben, um die Schrämwalze 5. Wird nun dieser Räumschildhalter 9 durch die Einwirkung übergroßer Biegekräfte verbogen, so schwenkt das Räumschild 8, wie in Fig. 2 gestrichelt dargestellt, gegen die Schrämwalze 5. Dadurch kommt es zu erheblichen Beschädigungen des Räumschildes, wobei sich die Schrämmeißel tief in dessen Beplankung hineinarbeiten. Um die dann notwendigen Reparaturarbeiten zu erleichtern und den dazu notwendigen Aufwand sowie den eventl. anfallenden Förderausfall zu verringern, wurde das Räumschild 8 erfindungsgemäß etwa in zwei Drittel seiner Tiefe durch eine schnell lösbare Verbindung aufgeteilt. Dadurch braucht man in Zukunft nur den äußeren Teil des Räumschildes 8 und den verbogenen Teil des ebenfalls aufgeteilten Räumschildhalters 9 auszutauschen. Zur Sicherung des Räumschildes 8 gegen eine Annäherung an die Schrämmeißel der Schrämwalze 5 ist es an einer geeigneten Stelle mit einem Annäherungsschalter 12 ausgerüstet, der bei einer Kollisionsgefahr ein optisches oder akustisches Signal 11 auslöst und/oder der Antrieb der Schrämwalze 5 abschaltet. Dieser Annäherungsschalter 12 ist in einer entsprechenden Aussparung des Räumschildes angeordnet und auf der der Schrämwalze 5 zugewandten Seite durch eine strahlendurchlässige Kappe oder dgl. kaschiert.The cutting machine 1 shown schematically in the drawing can be moved on the butt-side 2 and old-side 3 attachments of the face conveyor 4. The cutting roller 5, also shown here schematically, without a cutting chisel, is attached to the non-visible roller connection flange via the planet carrier housing 6 of the roller support arm 7. The circular blade-shaped or similarly designed clearing blade 8, which must always be in the cutting direction behind the cutting roller 5 in the working position, is detachably attached to the clearing blade holder 9. The dozer blade holder 9, which engages in a ring-shaped manner around the invisible guide on the planet carrier housing 6 of the roller support arm 7, swivels the dozer blade 8 around the cutting roller 5, as described above The clearing blade 8, as shown in dashed lines in FIG. 2, against the cutting roller 5. This causes considerable damage to the clearing blade, the cutting bits working deep into the planking. In order to facilitate the necessary repair work and the necessary effort as well as the eventl. To reduce the loss of production, the clearing blade 8 was divided according to the invention approximately two-thirds of its depth by a quick-release connection. As a result, only the outer part of the dozer blade 8 and the bent part of the dozer blade holder 9, which is also split, need be replaced in the future. To secure the clearing blade 8 against an approach to the cutting chisel of the cutting roller 5, it is equipped at a suitable point with a proximity switch 12 which triggers an optical or acoustic signal 11 in the event of a collision and / or switches off the drive of the cutting roller 5. This Proximity switch 12 is arranged in a corresponding recess in the clearing blade and is covered on the side facing the cutting roller 5 by a radiation-permeable cap or the like.

Um bei einer Berührung der Schrämmeißel mit dem Räumschild örtliche Überhitzungen und/oder Funkenbildungen auszuschalten, ist das Räumschild auf seiner Innenseite ganz oder teilweise mit einem nicht funkenbildenden Material, wie NE-Metall, Kunststoff oder dgl. verkleidet oder ganz aus diesem Material gefertigt.In order to prevent local overheating and / or spark formation when the cutter bit touches the clearing blade, the inside of the clearing blade is completely or partially covered with a non-sparking material, such as non-ferrous metal, plastic or the like, or made entirely from this material.

Claims (4)

1. Schrämwalzen-Räumschild, das vornehmlich kreisbogenförmig ausgebildet und lösbar an einem um die Achse der Schrämwalze (5) schwenkbaren Räumschildhalter (9) gehalten ist, dadurch gekennzeichnet, daß es ganz oder teilweise aus einem nicht funkenbildenden Material, wie NE-Metall, Kunststoff o. dgl. besteht oder innenseitig mit ihm beplankt ist, daß ein der Schrämmaschine (1) abgewandtes Teil an dem übrigen Teil auswechselbar befestigt ist, und daß es mit einem ein Signal auslösenden und/oder den Antrieb der Schrämwalze (5) abschaltenden Annäherungsschalter (12) ausgerüstet ist.1. scraper roller clearing blade, which is primarily circular arc-shaped and detachably held on a swiveling blade holder (9) about the axis of the scraper roller (5), characterized in that it is wholly or partly made of a non-sparking material such as non-ferrous metal, plastic o. or the like. Or is planked on the inside with it that a part facing away from the cutting machine (1) is attached to the other part in an exchangeable manner, and that it has a proximity switch (5) which triggers a signal and / or switches off the drive of the cutting roller (5) 12) is equipped. 2. Schrämwalzen-Räumschild nach Anspruch 1, dadurch gekennzeichnet, daß der oder die Annäherungsschalter (12) in Aussparungen des Räumschildes (8), gegen Beschädigungen geschützt, eingebaut und zur Schrämwalze (5) hin durch Kappen aus strahlendurchlässiges Material kaschiert sind.2. scraper roller clearing blade according to claim 1, characterized in that the or the proximity switch (12) in recesses of the clearing blade (8), protected against damage, installed and laminated to the scraper roller (5) by caps made of radiation-permeable material. 3. Schrämwalzen-Räumschild nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Betätigung des Annäherungsschalters induktiv oder kapazitiv erfogt3. scraper roller blade according to one of claims 1 or 2, characterized in that the actuation of the proximity switch takes place inductively or capacitively 4. Schrämwalzen-Räumschild nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Stromversorgung des Annäherungsschalters (12) und/oder die Weiterleitung des Signalstromes drahtlos erfolgt.4. scraper roller clearing blade according to one of claims 1 to 3, characterized in that the power supply of the proximity switch (12) and / or the transmission of the signal current takes place wirelessly.
EP19820112055 1982-12-28 1982-12-28 Clearing plate for a shearer drum Expired EP0112408B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19820112055 EP0112408B1 (en) 1982-12-28 1982-12-28 Clearing plate for a shearer drum
DE8282112055T DE3271481D1 (en) 1982-12-28 1982-12-28 Clearing plate for a shearer drum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19820112055 EP0112408B1 (en) 1982-12-28 1982-12-28 Clearing plate for a shearer drum

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EP0112408A1 true EP0112408A1 (en) 1984-07-04
EP0112408B1 EP0112408B1 (en) 1986-05-28

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DE (1) DE3271481D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104405387A (en) * 2014-12-04 2015-03-11 天地上海采掘装备科技有限公司 Pin-tooth-transmission arc-shaped spillplate mechanism with self-locking device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2654830A1 (en) * 1976-03-26 1977-09-29 Dale Mansfield Ltd PROTECTIVE OR COLLECTING DEVICE FOR USE ON SHEAR DRUMS IN MINING MACHINERY
DE2652614A1 (en) * 1976-11-19 1978-05-24 Eickhoff Geb Swinging arm mounted coal cutting drum - is mounted on shaft with hydraulically operated sliding ring incorporating toothed connection
DE2854025A1 (en) * 1977-12-14 1979-07-19 Pyroban Ltd EXPLOSION PROTECTION DEVICE FOR ELECTRICAL SYSTEMS
DE2822583A1 (en) * 1978-05-24 1979-11-29 Eickhoff Geb Hydraulic mine cutting machine swivelling shield - has perforated curves on vanes elastically mounted in central retainer hole
DE2935401B1 (en) * 1979-09-01 1980-06-12 Vaw Ver Aluminium Werke Ag Use of an aluminum composite
GB2066873A (en) * 1979-12-21 1981-07-15 Green & Bingham Ltd Cowl drive

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2654830A1 (en) * 1976-03-26 1977-09-29 Dale Mansfield Ltd PROTECTIVE OR COLLECTING DEVICE FOR USE ON SHEAR DRUMS IN MINING MACHINERY
DE2652614A1 (en) * 1976-11-19 1978-05-24 Eickhoff Geb Swinging arm mounted coal cutting drum - is mounted on shaft with hydraulically operated sliding ring incorporating toothed connection
DE2854025A1 (en) * 1977-12-14 1979-07-19 Pyroban Ltd EXPLOSION PROTECTION DEVICE FOR ELECTRICAL SYSTEMS
DE2822583A1 (en) * 1978-05-24 1979-11-29 Eickhoff Geb Hydraulic mine cutting machine swivelling shield - has perforated curves on vanes elastically mounted in central retainer hole
DE2935401B1 (en) * 1979-09-01 1980-06-12 Vaw Ver Aluminium Werke Ag Use of an aluminum composite
GB2066873A (en) * 1979-12-21 1981-07-15 Green & Bingham Ltd Cowl drive

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104405387A (en) * 2014-12-04 2015-03-11 天地上海采掘装备科技有限公司 Pin-tooth-transmission arc-shaped spillplate mechanism with self-locking device

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DE3271481D1 (en) 1986-07-03
EP0112408B1 (en) 1986-05-28

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