US3492048A - Mining apparatus - Google Patents

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US3492048A
US3492048A US684692A US3492048DA US3492048A US 3492048 A US3492048 A US 3492048A US 684692 A US684692 A US 684692A US 3492048D A US3492048D A US 3492048DA US 3492048 A US3492048 A US 3492048A
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cutter
mining
axis
motor
rotatable
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Roger C Anderson
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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
    • E21C27/20—Mineral freed by means not involving slitting
    • E21C27/24—Mineral freed by means not involving slitting by milling means acting on the full working face, i.e. the rotary axis of the tool carrier being substantially parallel to the working face

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  • the mining machine of the present invention comprises improvements on the mining machines described and shown in US. Patents 3,333,894 (Frellsen) and 3,333,895 (Anderson) wherein a mining machine having a pair of vertically adjustable horizontally oscillatable, rotary mining heads mounted on respective horizontally oscillatable pivotable arms provide a motor mounted on the main frame of the machine for rotating each of the mining heads.
  • Such motors were of necessity connected to the mining heads by way of elongated drive shafts incorporating at least one universal joint per shaft.
  • the mining machine of the present invention incorporates a cutter rotating motor mounted on each oscillatable arm and drivingly connected to the respective mining heads by simple spur gearing. It is a further provision of this invention that the mining head motor be mounted with its axis of rotation parallel to the axis of rotation of the mining head thus avoiding the necessity for bevel gearing.
  • the mining machine of this invention further provides for the end to end positioning of the hydraulic cylinders which oscillate the arms.
  • FIG. 1 is a top plan view of a mining machine constructed according to the principles of this invention
  • FIG. 2 is a fragmentary side elevational view of a portion of the machine of FIG. 1;
  • FIG. 3 is a fragmentary top plan view of a portion of the mining machine in FIG. 1 on an enlarged scale with portions broken away to show internal details of the mining machine portion;
  • FIG. 4 is a partially sectional view taken substantially on line IVIV of FIG. 3 looking in the direction indicated by the arrows;
  • FIG. 5 is an illustrative showing of the gearing within the mining machine portion of FIG. 3.
  • FIG. 1 there is shown a mining machine generally indicated at constructed according to the principles of this invention and comprising a main frame portion 12, mounted upon mobile means such as a pair of crawler units 14 (see FIG. 2) and incorporating a' central longitudinally extending conveyor 16, all as well known in the art.
  • a mining machine generally indicated at constructed according to the principles of this invention and comprising a main frame portion 12, mounted upon mobile means such as a pair of crawler units 14 (see FIG. 2) and incorporating a' central longitudinally extending conveyor 16, all as well known in the art.
  • the front portion of the main frame 12 (to the right as seen in FIGS. 1 and 2) has an elongated forwardly extending cutter boom 18 pivotably mounted thereon and rotatable about a horizontal axis provided by a pair of cylindrical pins 19 (only one of which is shown, see FIG. 2) pivotably connecting the forward end of the main frame 12 and the rearward end of the cutter boom 18.
  • Power for such rotation which raises and lowers the forward end of the cutter boom 18 is provided by a pair of hydraulic cylinders 22 suitably pivotably connected between a forward portion of the main frame 12 and a pair of jack lugs 24 rigidly mounted at an upper rearward portion of the cutter boom 18 so that contraction of the hydraulic cylinder unit 22 effected by suitably supplying pressure fluid to the rod end of the hydraulic cylinder unit 22 will cause the front end of the boom 18 to be raised as seen in the broken line outline in FIG. 2.
  • the cutter boom 18 is a generally rectangular, hollow box structure comprising a horizontally extending top plate 26, a bottom plate 28 (see FIGS. 3 and 4) and side plates 30 rigidly secured together as by welding and provided with suitable internal reinforcing structures to form a rigid hollow member in a well known manner.
  • a pair of support arms 31 Pivotably mounted within the cutter boom 18 (see FIGS. 3 and 4) for limited swinging movement about substantially perpendicular axes is a pair of support arms 31 (only one of which is shown) comprising forwardly extending cutter head gear cases 32 and 33, left hand and right hand respectively, and rearwardly extending arm portions 35 suitably pivotably secured within a rearward portion of the cutter boom 18 by substantially vertically disposed pins 36 extending between, and rigidly secured to, the top plate 26 and the bottom plate 28 and suitably journaled in the arm portions 35 to provide for limited horizontal oscillation of the support arms 31 as desired.
  • gear cases 32 and 33 and their respective arm portions 35 are in all respects similar though mirror images of each other to provide for left hand and right hand mounting as shown. Consequently only the right hand support arm 31 and right hand gear case 33 will be described in detail since the same description would sufiice for the left hand support arm 31 and gear case 32.
  • a horizontally extending cutter wheel shaft 38 Within the forward portion of the gear case 33 there is mounted a horizontally extending cutter wheel shaft 38, rotatable about the central axis 39 thereof, and having mounted thereon a plurality (shown as 3) of cutter wheels 40 provided with a lurality of cutting elements 42 to be used for winning coal or other mineral from a vein in a manner well known in the art.
  • an energizable motor means such as an electric motor 44 suitably connected to a source of power (not shown) and having an elongated rotor member rotatable about a longitudinal axis 45 parallel to the axis 39 of the shaft 38.
  • the motor 44 comprises an elongated rotor member such as an armature 46 suitably journaled for rotation on the axis 45 and having a rotor shaft extending therefrom through an adjustable clutch mechanism 48 to a pinion gear 50 rotatable on the axis 45 through action of the clutch mechanism 48 in a well known manner.
  • a series of speed reduction gears, generally indicated at 49, all mounted on respective axes parallel to the axis 45 transmit the rotational power of the motor 44 to a final driven gear 52 mounted on the shaft 38 in keyed relationship therewith so that rotation of the rotor 46 is transferred through the gear train 49 with speed reduction to the shaft 38 for powered rotation of the cutter wheels 40.
  • the rod end 54 of an axially extensible fluid operated power means such as an hydraulic cylinder unit 55 is pivotably mounted.
  • the head end 56 of the cylinder unit 55 is pivotably secured to the arm 31 at a point intermediate the motor 44 and the cutter rotating shaft 38 and more than two thirds of the distance from pins 36 to shaft 38, to oscillate the right hand gear case 33 in a substantially horizontal plane.
  • the cylinder unit 55 is provided with suitable pressure fluid connections communicating with a suitable source of pressure fluid suitably controlled by a servo valve 58 pivotably connected to, and actuated by the arm 31 and an eccentric drive mechanism (not shown) in the manner described and shown in the above identified Frellsen patent.
  • An entirely similar hydraulic cylinder unit 60 is similarly mounted with its rod end pivotably connected at an analogous point on the left hand side of the center line of the cutter boom 18 and being similarly provided with suitable pressure fluid through the use of a second servo valve (not shown) similarly controls the motion of the left hand gear case 32.
  • the cylinders 55 and 60 are connected in end to end juxtaposition as shown in FIG.
  • a mining apparatus having a mobile frame with a pair of forwardly extending elongated support arms mounted on said mobile frame for pivotable movement about spaced axes, respectively, and a cutter head rotatably mounted at the end of each of said support arms, with each cutter head rotatable about a substantially horizontal axis transverse to the respective support arm and means for oscillating the arms about the spaced axes in a substantially horizontal plane
  • the improvement comprising: energizable motor means for rotating each of said cutter heads mounted intermediate the ends of each of said support arms, each said motor means having a rotor member drivingly connected to said cutter head and rotatable about an axis parallel to said substantially horizontal axis.
  • said rotor member has an axially extending shaft portion; a spur type gear rotatable by said motor means about the axis of said shaft portion; a plurality of speed reduction gears rotatable about axes parallel to the said substantially horizontal axis in toothed engagement with each other, respectively, and with a final spur gear rotatable about said substantially horizontal axis and drivingly connected to said cutter head for powered rotation thereof.
  • said means for oscillating said sup-port arms is a pair of double acting extensible hydraulic cylinders connected between said mobile frame and the respective ones of said support arms in end to end relationship.
  • said mobile frame is mounted on a pair of crawler supports; said mobile frame comprising an elongated rear- Wardly extending, centrally disposed conveyor portion; a generally rectangular, hollow cutter boom pivotably mounted 0n the forward end of said mobile frame for powered partial rotation about a horizontal axis to raise and lower said cutter heads; said support arms being pivotably secured within said cutter boom and raised and lowered thereby; a pair of extensible hydraulic cylinders each having a hollow elongated cylinder portion mounted on and oscillatable with a respective support arm; and each of said cylinders having an extensible rod portion pivotably secured to a central portion of said cutter boom at a point adjacent the central axis thereof on the same side of said central axis as the respective support arm on which the said cylinder portion is mounted.
  • each of said double acting hydraulic cylinders respectively comprises an elongated hollow cylindrical portion pivotably connected to, and oscillatable with, a respective support arm and each hydraulic cylinder further comprises an extensible rod portion pivotably secured to a nonoscillating part of said mobile frame adjacent to a similar mounting of the rod end portion associated with the other of said support arms.
  • each of said motor means is mounted on the respective support arm at a point intermediate between the respective one of said spaced axes and the connection point of the respective cylindrical portion on the respective support arm.
  • a mining apparatus of the type having cutting means rotatable about substantially horizonal axes and carried by support members, respectively, for axial oscillatory movement and vertical movement and in which motor means are carried by said support members to rotatively drive said cutter means, respectively, the improvement comprising, mounting said motor means on said support members with rotatable output shafts thereof parallel to the axes about which said cutter means rotate, respectively.

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  • 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)
  • Transmission Devices (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Description

Jan. 27, 1970 R. c. ANDERSON 3,492,048
MINING APPARATUS Filed NOV. 21 1967 2 Sheets-Sheet 1 INVENTOR. (0 Roger C. Anderson.
Jan. 27, 1970 R. c. ANDERSON 3,492,048
I MINING APPARATUS Filed. NOV. 21 196'? 2 Sheets-Sheet 2 INVENTOR. Roger C.Anderson.
United States Patent 3,492,048 MINING APPARATUS Roger C. Anderson, 304 16th St., Franklin, Pa. 16323 Filed Nov. 21, 1967, Ser. No. 684,692
Int. Cl. E21c 25/00 U.S. Cl. 299'71 9 Claims ABSTRACT OF THE DISCLOSURE A ripper type mining machine having a pair of vertically adjustable, horizontally oscillatable, rotary mining heads mounted on respective pivotable arms wherein each head is rotatable by a motor mounted on the respective arm with the motor axis parallel to the axis of rotation of the respective mining head.
The mining machine of the present invention comprises improvements on the mining machines described and shown in US. Patents 3,333,894 (Frellsen) and 3,333,895 (Anderson) wherein a mining machine having a pair of vertically adjustable horizontally oscillatable, rotary mining heads mounted on respective horizontally oscillatable pivotable arms provide a motor mounted on the main frame of the machine for rotating each of the mining heads. Such motors were of necessity connected to the mining heads by way of elongated drive shafts incorporating at least one universal joint per shaft. The mining machine of the present invention incorporates a cutter rotating motor mounted on each oscillatable arm and drivingly connected to the respective mining heads by simple spur gearing. It is a further provision of this invention that the mining head motor be mounted with its axis of rotation parallel to the axis of rotation of the mining head thus avoiding the necessity for bevel gearing.
The mining machine of this invention further provides for the end to end positioning of the hydraulic cylinders which oscillate the arms.
The advantages and objects of this invention will become more readily apparent on consideration of the following description and drawings of a preferred embodiment in which:
FIG. 1 is a top plan view of a mining machine constructed according to the principles of this invention;
FIG. 2 is a fragmentary side elevational view of a portion of the machine of FIG. 1;
FIG. 3 is a fragmentary top plan view of a portion of the mining machine in FIG. 1 on an enlarged scale with portions broken away to show internal details of the mining machine portion;
FIG. 4 is a partially sectional view taken substantially on line IVIV of FIG. 3 looking in the direction indicated by the arrows; and
FIG. 5 is an illustrative showing of the gearing within the mining machine portion of FIG. 3.
In FIG. 1 there is shown a mining machine generally indicated at constructed according to the principles of this invention and comprising a main frame portion 12, mounted upon mobile means such as a pair of crawler units 14 (see FIG. 2) and incorporating a' central longitudinally extending conveyor 16, all as well known in the art.
The front portion of the main frame 12 (to the right as seen in FIGS. 1 and 2) has an elongated forwardly extending cutter boom 18 pivotably mounted thereon and rotatable about a horizontal axis provided by a pair of cylindrical pins 19 (only one of which is shown, see FIG. 2) pivotably connecting the forward end of the main frame 12 and the rearward end of the cutter boom 18. Power for such rotation which raises and lowers the forward end of the cutter boom 18 is provided by a pair of hydraulic cylinders 22 suitably pivotably connected between a forward portion of the main frame 12 and a pair of jack lugs 24 rigidly mounted at an upper rearward portion of the cutter boom 18 so that contraction of the hydraulic cylinder unit 22 effected by suitably supplying pressure fluid to the rod end of the hydraulic cylinder unit 22 will cause the front end of the boom 18 to be raised as seen in the broken line outline in FIG. 2.
The cutter boom 18 is a generally rectangular, hollow box structure comprising a horizontally extending top plate 26, a bottom plate 28 (see FIGS. 3 and 4) and side plates 30 rigidly secured together as by welding and provided with suitable internal reinforcing structures to form a rigid hollow member in a well known manner.
Pivotably mounted within the cutter boom 18 (see FIGS. 3 and 4) for limited swinging movement about substantially perpendicular axes is a pair of support arms 31 (only one of which is shown) comprising forwardly extending cutter head gear cases 32 and 33, left hand and right hand respectively, and rearwardly extending arm portions 35 suitably pivotably secured within a rearward portion of the cutter boom 18 by substantially vertically disposed pins 36 extending between, and rigidly secured to, the top plate 26 and the bottom plate 28 and suitably journaled in the arm portions 35 to provide for limited horizontal oscillation of the support arms 31 as desired.
It is to be noted that the gear cases 32 and 33 and their respective arm portions 35 are in all respects similar though mirror images of each other to provide for left hand and right hand mounting as shown. Consequently only the right hand support arm 31 and right hand gear case 33 will be described in detail since the same description would sufiice for the left hand support arm 31 and gear case 32.
Within the forward portion of the gear case 33 there is mounted a horizontally extending cutter wheel shaft 38, rotatable about the central axis 39 thereof, and having mounted thereon a plurality (shown as 3) of cutter wheels 40 provided with a lurality of cutting elements 42 to be used for winning coal or other mineral from a vein in a manner well known in the art.
Rigidly secured to an intermediate portion of the support arm 31 is an energizable motor means such as an electric motor 44 suitably connected to a source of power (not shown) and having an elongated rotor member rotatable about a longitudinal axis 45 parallel to the axis 39 of the shaft 38.
As shown in .FIG. 5 the motor 44 comprises an elongated rotor member such as an armature 46 suitably journaled for rotation on the axis 45 and having a rotor shaft extending therefrom through an adjustable clutch mechanism 48 to a pinion gear 50 rotatable on the axis 45 through action of the clutch mechanism 48 in a well known manner. A series of speed reduction gears, generally indicated at 49, all mounted on respective axes parallel to the axis 45 transmit the rotational power of the motor 44 to a final driven gear 52 mounted on the shaft 38 in keyed relationship therewith so that rotation of the rotor 46 is transferred through the gear train 49 with speed reduction to the shaft 38 for powered rotation of the cutter wheels 40. The mounting of the motor 44 on the arm 31 with its axis 45 parallel to the axis 39 of the cutter rotating shaft 38 results in the use of simple spur gearing with no long shafting, universal joints or bevel gearing and with consequent reduction in cost, increase in reliability and improvement in efficiency of power transmission.
At a point near the forward edge of the cutter boom 18, internally thereof and rightwardly adjacent to the center line of the cutter boom 18, the rod end 54 of an axially extensible fluid operated power means such as an hydraulic cylinder unit 55 is pivotably mounted. The head end 56 of the cylinder unit 55 is pivotably secured to the arm 31 at a point intermediate the motor 44 and the cutter rotating shaft 38 and more than two thirds of the distance from pins 36 to shaft 38, to oscillate the right hand gear case 33 in a substantially horizontal plane. The cylinder unit 55 is provided with suitable pressure fluid connections communicating with a suitable source of pressure fluid suitably controlled by a servo valve 58 pivotably connected to, and actuated by the arm 31 and an eccentric drive mechanism (not shown) in the manner described and shown in the above identified Frellsen patent.
An entirely similar hydraulic cylinder unit 60 is similarly mounted with its rod end pivotably connected at an analogous point on the left hand side of the center line of the cutter boom 18 and being similarly provided with suitable pressure fluid through the use of a second servo valve (not shown) similarly controls the motion of the left hand gear case 32. The cylinders 55 and 60 are connected in end to end juxtaposition as shown in FIG. 1 and provide simultaneous axial forces in opposite directions to simultaneously oscillate the gear cases 32 and 33 in opposite directions with the result that the cylinders 55 and 60 provide a balance of forces and avoid the twisting moments of force which would be applied to the cutter boom 18 in case the cylinders 55 and 60 were positioned in an overlapping configuration as was necessitated in earlier machines by the use of complicated gearing employed in the shaft drive of earlier machines.
Is it to be further noted that the mounting of the motor 44 with the axis 45 thereof parallel to the axis 39 and with the rapid continuous oscillation taking place on an arc tangent to the axis 39, and almost coincident therewith, inertial forces on the rotor 46 will be almost entirely axial in direction and thus the inertial forces will be applied lengthwise of the rotor shaft rather than transverse thereto as would have been the case if the motor position were otherwise than that described.
What is claimed:
1. In a mining apparatus having a mobile frame with a pair of forwardly extending elongated support arms mounted on said mobile frame for pivotable movement about spaced axes, respectively, and a cutter head rotatably mounted at the end of each of said support arms, with each cutter head rotatable about a substantially horizontal axis transverse to the respective support arm and means for oscillating the arms about the spaced axes in a substantially horizontal plane, the improvement comprising: energizable motor means for rotating each of said cutter heads mounted intermediate the ends of each of said support arms, each said motor means having a rotor member drivingly connected to said cutter head and rotatable about an axis parallel to said substantially horizontal axis.
2. The mining apparatus as specified in claim 1 wherein said motor means is an electric motor and said rotor member is the armature of said electric motor.
3. The apparatus as set forth in claim 1 wherein said rotor member has an axially extending shaft portion; a spur type gear rotatable by said motor means about the axis of said shaft portion; a plurality of speed reduction gears rotatable about axes parallel to the said substantially horizontal axis in toothed engagement with each other, respectively, and with a final spur gear rotatable about said substantially horizontal axis and drivingly connected to said cutter head for powered rotation thereof.
4. The mining apparatus as specified in claim 1 wherein said spaced axes are substantially vertical parallel axes; said substantially horizontal axis is contained in a plane normal to said spaced axes; and the axis of said rotor member is parallel to said substantially horizontal axis.
5. The mining apparatus as set forth in claim 1 wherein said means for oscillating said sup-port arms is a pair of double acting extensible hydraulic cylinders connected between said mobile frame and the respective ones of said support arms in end to end relationship.
6. The mining apparatus as specified in claim 1 wherein said mobile frame is mounted on a pair of crawler supports; said mobile frame comprising an elongated rear- Wardly extending, centrally disposed conveyor portion; a generally rectangular, hollow cutter boom pivotably mounted 0n the forward end of said mobile frame for powered partial rotation about a horizontal axis to raise and lower said cutter heads; said support arms being pivotably secured within said cutter boom and raised and lowered thereby; a pair of extensible hydraulic cylinders each having a hollow elongated cylinder portion mounted on and oscillatable with a respective support arm; and each of said cylinders having an extensible rod portion pivotably secured to a central portion of said cutter boom at a point adjacent the central axis thereof on the same side of said central axis as the respective support arm on which the said cylinder portion is mounted.
7. The mining apparatus as specified in claim 5 wherein each of said double acting hydraulic cylinders respectively comprises an elongated hollow cylindrical portion pivotably connected to, and oscillatable with, a respective support arm and each hydraulic cylinder further comprises an extensible rod portion pivotably secured to a nonoscillating part of said mobile frame adjacent to a similar mounting of the rod end portion associated with the other of said support arms.
8. The mining apparatus as specified in claim 7 wherein each of said motor means is mounted on the respective support arm at a point intermediate between the respective one of said spaced axes and the connection point of the respective cylindrical portion on the respective support arm.
9. In a mining apparatus of the type having cutting means rotatable about substantially horizonal axes and carried by support members, respectively, for axial oscillatory movement and vertical movement and in which motor means are carried by said support members to rotatively drive said cutter means, respectively, the improvement comprising, mounting said motor means on said support members with rotatable output shafts thereof parallel to the axes about which said cutter means rotate, respectively.
References Cited UNITED STATES PATENTS 3,128,998 4/1964 Sibley 299-71 X 3,157,437 11/1964 Gonski 29971 3,161,439 12/1964 Newton et al 29971 X 3,197,256 7/1965 Hlinsky 29971 X 3,245,723 4/1966 Gonski 2997l X 3,333,894 8/1967 Frellsen 29971 X ERNEST R. PURSER, Primary Examiner US. Cl. X.R. 299-76
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128998A (en) * 1964-04-14 Scroll type full face continuous miner
US3157437A (en) * 1962-09-19 1964-11-17 Goodman Mfg Co Continuous mining machine of the oscillating head type
US3161439A (en) * 1961-07-26 1964-12-15 Goodman Mfg Co Continuous mining machine of the side cutting auger type
US3197256A (en) * 1961-01-23 1965-07-27 Goodman Mfg Co Continuous mining machine with loading means
US3245723A (en) * 1962-09-19 1966-04-12 Goodman Mfg Co Continuous mining machine
US3333894A (en) * 1964-09-28 1967-08-01 Joy Mfg Co Mining machine having cutter arms oscillated in opposite directions and in phase

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128998A (en) * 1964-04-14 Scroll type full face continuous miner
US3197256A (en) * 1961-01-23 1965-07-27 Goodman Mfg Co Continuous mining machine with loading means
US3161439A (en) * 1961-07-26 1964-12-15 Goodman Mfg Co Continuous mining machine of the side cutting auger type
US3157437A (en) * 1962-09-19 1964-11-17 Goodman Mfg Co Continuous mining machine of the oscillating head type
US3245723A (en) * 1962-09-19 1966-04-12 Goodman Mfg Co Continuous mining machine
US3333894A (en) * 1964-09-28 1967-08-01 Joy Mfg Co Mining machine having cutter arms oscillated in opposite directions and in phase

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