US3482879A - Longwall mining apparatus - Google Patents

Longwall mining apparatus Download PDF

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Publication number
US3482879A
US3482879A US684855A US3482879DA US3482879A US 3482879 A US3482879 A US 3482879A US 684855 A US684855 A US 684855A US 3482879D A US3482879D A US 3482879DA US 3482879 A US3482879 A US 3482879A
Authority
US
United States
Prior art keywords
cutter
plate
roll
bucking
bucking plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US684855A
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English (en)
Inventor
Werner Droste
Willy Lanfermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gebr Eickhoff Maschinenfabrik u Eisengiesserei GmbH
Original Assignee
Gebr Eickhoff Maschinenfabrik u Eisengiesserei GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gebr Eickhoff Maschinenfabrik u Eisengiesserei GmbH filed Critical Gebr Eickhoff Maschinenfabrik u Eisengiesserei GmbH
Application granted granted Critical
Publication of US3482879A publication Critical patent/US3482879A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • E21C35/20—General features of equipment for removal of chippings, e.g. for loading on conveyor
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
    • E21C25/06—Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate
    • E21C25/14—Machines slitting solely by one or more cutting rods or cutting drums which rotate, move through the seam, and may or may not reciprocate with equipment for cleaning the slit
    • E21C25/145—Cowls
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18888—Reciprocating to or from oscillating
    • Y10T74/1892—Lever and slide
    • Y10T74/18968—Flexible connections

Definitions

  • Convenient, compact power-operated means for swinging the bucking plate from one side of the roll cutter to the other comprising an articulated poWertransmitting mechanical means connected to the bucking plate and traveling in a semicircular path about the pivot axis with respect to which the bucking plate turns, the articulated means being powered by hydraulic cylinders of relatively short stroke.
  • a bucking plate having a portion which may be pivoted through 90, to avoid contact with the arm by means of which the cutter rollers are moved up and down, when placing the bucking plate on the same side of the axis of the cutter roll as that arm.
  • This invention relates to longwall mining apparatus.
  • the cutter it is essential, for convenient operation, for the cutter to be capable of moving in either direction along the face which it cuts-that is, either from right to left or from left to right, looking down upon the operation.
  • a bucking plate is rather a heavy structure that extends between the newly cut face and the conveying means and is arranged to follow behind the cutter roll and urge the mineral that it has dislodged into the conveying means.
  • the prior art has lacked a convenient and compact swiveling mechanism that may be hydraulically operated and is particularly suited for the turning of a bucking plate in roll cutters for longwall mining.
  • Roll cutters are frequently made in each a way that the cutter roll is mounted on an arm that is located between the conveyor and the face to be mined and turns about a pivot so that the cutter roll may be moved up and down; otherwise, the swath cut by the roll cutter would be limited to the diameter of the cutter roll.
  • This poses a problem with the bucking plate Prior to the present invention, it has been the practice either to limit the length of the bucking plate so that it may be swung from one side of the cutter roll to the other Without coming into contact with the above-mentioned arm, or not to provide for turning of the bucking plate.
  • the former has the drawback that a portion of the mine door is left unswept, and the latter has the drawback that motion of the roll cutter is limited to one direction of traverse.
  • This invention overcomes the above-indicated problems by providing a roll cutter having a bucking plate which may be moved from one side to the other of the roll cutter by means of an articulated power-transmitting mechanical means which is connected to the bucking plate and travels in a semicircular path about the pivot axis with respect to which the bucking plate turns, the articulated means being powered by hydraulic cylinders or the like of relatively short stroke.
  • the bucking plate extends substantially from the face to the conveyor, and it has a portion which may me pivoted through to avoid contact with the arm by means of which the cutter roll is moved up and down, so that contact between the bucking plate and the arm is avoided in placing the bucking plate on the same side of the axis of the cutter roll as that arm.
  • FIGURE 1 is a schematic side view of a cutter and its associateed equipment, in accordance with the invention
  • FIG. 2 is a plan view of the parts shown in FIG. 1;
  • FIG. 3 is a detailed elevation view, partly in section, of a portion of the apparatus shown in FIGS. 1 and 2;
  • FIG. 4 is a detailed elevation view taken on the line IV-IV of FIG. 3;
  • FIG. 5 is a detailed elevation view, in section, taken on the line V-V of FIG. 3.
  • FIG. 1 there is shown a View, looking toward the face to be cut, of longwall mining apparatus in accordance with the invention.
  • a conveyor 4 which serves not only to convey loosened mineral toward one end of the face but also to move the cutter 6, continuously or intermittently, from one end of the face to the other.
  • the cutter 6 has dislodged the coal in the area 8 and will be moved in the direction of the arrow 10 to dislodge the mineral in the area 12. This is done by moving the base 14 upon which the cutter 6 rests.
  • the cutter 6 comprises a body 16 containing suitable power and drive equipment, an arm 18, and a cutter roll 20. Suitable means (not shown) are provided to cause the roll to revolve, coming into contact with the mineral of the face and dislodging it. It is also usual for the roll 20 to have means arranged helically on its cylindrical surface to urge the loosened mineral toward the conveyor 4.
  • equipment comprising a hydraulic cylinder 22, arranged to operate a bell crank 24 and thus move the arm 18.
  • a bucking plate 26 is connected by means of arms 28 to a ring 30, which is arranged concentrically about the axis 32 of the roll 20.
  • the bucking plate 26 follows behind the roll 20 and serves also to urge dislodged mineral toward the conveyor 4.
  • the bucking plate 26 is provided with a portion 34 near the conveyor 4 which may be swiveled 90 about a pivot 36, in order to avoid contact between the bucking plate 26 and the arm 18 when the bucking plate 26 is swiveled 180, so as to lie on the other side of the cutter roll 20.
  • the dimensions of the portion 34 are such that it may,
  • equipment for moving the bucking plate 26 from one side to the other of the roll 20 comprising a pair of hydraulic cylinders 38 and 40 of relatively short stroke, these cylinders having pistons 42 and 44, respectively, which bear upon the end ones 46 of a plurality of balls 48 arranged in a passage 50 having, as shown, a semicircular portion, with there being a dog 52 positioned between and adapted 4 to be driven by the middle ones of the balls 48.
  • the dog 52 is connected to a plate 54, which has an eccentric portion 56, by means of which the plate 54 turns the ring 30 and thus the arms 28 that are connected to the bucking plate 26.
  • the pistons 42 and 44 are of the recuperating type, so that as the piston 42 is advanced, the piston 44 is retracted, and vice versa. From an examination of FIG. 1, it can readily be seen that, if the cutter 6 were at the end of its traverse, so that there were no coal in the position of the portion of the face 12 that would impede motion of the bucking plate 26 to a position on the opposite side of the roll 20, it would be possible, by advancing the piston 44 and simultaneously retracting the piston 42, to cause the dog 52 to be driven around the semicircular portion of the passage 50. This would effect a change of 180 in the position of the ring 30 and thus move the bucking plate 26 to the desired new position.
  • the invention resides in the use of an articulated power-transmitting mechanical means to swivel the bucking plate 26 :from one side to the other of the cutter roll 20.
  • the invention comprises also other uses of such an articulated power-transmitting means, such as to produce the swivel movement of the roll support arm 18 up and down, or to move the cutter 6 about a pivot so as to change the angle between the axis 32 and the face 8.
  • Those skilled in the art of machine design will perceive still other uses of the means.
  • Elements of various kinds may be used as the mechanical articulated power-transmitting means, and among these may be mentioned stranded wires, spiral windings which are rigid in themselves, and roller chains.
  • the plate 54 has an eccentric portion 56.
  • the periphery of the plate S4 is a semicircle at the upper part, in the position of the plate shown in FIG. 3.
  • the plate 54 has a somewhat larger radius than the outer wall of the guide passage 50.
  • the periphery of the plate 54 is extended downward in the form of tangents laid on this semicircle, until it strikes a circular portion which is below, in the position of the device shown in FIG. 3.
  • the radially extending connecting piece 58 is attached inwardly thereof. This is best seen in FIG. 4.
  • To the piece 58 is connected a second connecting piece 60, which is likewise segmented and runs in the peripheral direction.
  • connecting piece 62 which also extends radially.
  • the connecting piece 62 is screwed to the ring 30 by means of screws 64.
  • the support arms 28 of the bucking plate 26 rest on the ring 30.
  • Attached slanted ribs 66 which may be seen in FIGS. 3 and 4, serve to strengthen this segment connection.
  • the passage 50 comprises a square semicircular recess within which are contained the balls 48, which are dimensioned in accordance with the bore of the cylinder 38 and 40 and are held and guided in the recess 50 by means of a pressure bar 68, which is adapted to the radius of the balls 48.
  • the passage 50 has an outer slot 70 which extends over the entire semicircle.
  • a connecting piece 72 slides into it.
  • the piece 72 connects the dog 52, which slides in the guide passage 50, with a freely movable plate 54 placed in front of the plate 74 opposite it.
  • the front plate 74 cooperates with a conically tapered part 76 to form a support body 78, which accommodates the parts of the device for rotating the bucking plate 26.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Harvesting Machines For Root Crops (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
US684855A 1966-11-23 1967-11-21 Longwall mining apparatus Expired - Lifetime US3482879A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEE32900A DE1259279B (de) 1966-11-23 1966-11-23 Schwenkvorrichtung fuer Walzenschraemmaschinen, insbesondere fuer ein um eine Schraemwalzenachse schwenkbares Raeumblech

Publications (1)

Publication Number Publication Date
US3482879A true US3482879A (en) 1969-12-09

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US684855A Expired - Lifetime US3482879A (en) 1966-11-23 1967-11-21 Longwall mining apparatus

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US (1) US3482879A (de)
DE (1) DE1259279B (de)
GB (1) GB1179759A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3578811A (en) * 1968-08-10 1971-05-18 Eickhoff Geb Roller cutter
US4068894A (en) * 1976-03-26 1978-01-17 Dale (Mansfield) Limited Mining machine cowl assembly
US4181032A (en) * 1977-07-25 1980-01-01 Wagner Daryl A Steering gear
US4251112A (en) * 1978-06-03 1981-02-17 Geb. Eickhoff Maschinenfabrik Und Eisengiesserei M.B.H. Apparatus for pivotally positioning a clearing shield for a drum-cutter mining machine
US4346939A (en) * 1979-10-17 1982-08-31 Gerb. Eickhoff Machinenfabrik Und Eisengiesserei M.B.H. Cowl assembly for longwall mining machine
US4697468A (en) * 1984-03-28 1987-10-06 Moveco System Ab Rotary mechanism
DE102018007182A1 (de) * 2018-09-11 2020-03-12 Fritz Stepper GmbH & Co. KG. Einrichtung zur Umlenkung einer Betätigungskraft für ein Werkzeug, insbesondere ein Bearbeitungs- oder ein Montagewerkzeug sowie ein derartiges Bearbeitungswerkzeug

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2619514C2 (ru) * 2014-12-18 2017-05-16 Александр Семенович Рыжков Поворотный двигатель

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2754527A (en) * 1948-10-08 1956-07-17 Joseph Behr & Sons Inc Oscillatable die head in a heading machine
US3267817A (en) * 1962-08-08 1966-08-23 Graham Engineering Company Inc Fluid rotary actuator
US3267816A (en) * 1962-05-15 1966-08-23 Graham Engineering Company Inc Rotary actuator device
US3291533A (en) * 1962-07-20 1966-12-13 Coal Industry Patents Ltd Longwall mining machines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2754527A (en) * 1948-10-08 1956-07-17 Joseph Behr & Sons Inc Oscillatable die head in a heading machine
US3267816A (en) * 1962-05-15 1966-08-23 Graham Engineering Company Inc Rotary actuator device
US3291533A (en) * 1962-07-20 1966-12-13 Coal Industry Patents Ltd Longwall mining machines
US3267817A (en) * 1962-08-08 1966-08-23 Graham Engineering Company Inc Fluid rotary actuator

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3578811A (en) * 1968-08-10 1971-05-18 Eickhoff Geb Roller cutter
US4068894A (en) * 1976-03-26 1978-01-17 Dale (Mansfield) Limited Mining machine cowl assembly
US4181032A (en) * 1977-07-25 1980-01-01 Wagner Daryl A Steering gear
US4251112A (en) * 1978-06-03 1981-02-17 Geb. Eickhoff Maschinenfabrik Und Eisengiesserei M.B.H. Apparatus for pivotally positioning a clearing shield for a drum-cutter mining machine
US4346939A (en) * 1979-10-17 1982-08-31 Gerb. Eickhoff Machinenfabrik Und Eisengiesserei M.B.H. Cowl assembly for longwall mining machine
US4697468A (en) * 1984-03-28 1987-10-06 Moveco System Ab Rotary mechanism
DE102018007182A1 (de) * 2018-09-11 2020-03-12 Fritz Stepper GmbH & Co. KG. Einrichtung zur Umlenkung einer Betätigungskraft für ein Werkzeug, insbesondere ein Bearbeitungs- oder ein Montagewerkzeug sowie ein derartiges Bearbeitungswerkzeug

Also Published As

Publication number Publication date
DE1259279B (de) 1968-01-25
GB1179759A (en) 1970-01-28

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