US2218491A - Drilling apparatus - Google Patents

Description

0d 15, 1940- c. F. osGooD DRILLING APPARATUS 5 Sheets-Sheet l Original Filed Dec. 18, 1931 Ot. 15, 1940. F, QSGOOD DRILLING APPARATUS Original Filed Deo. 18, 1931 3 Sheets-Sheet 2 hun.. mu km t O0@ o o o o O o @n.w.. o o m o o ...,...rllh o um. l .uw u w o s. w .wH/ n w /f )l l/ J\ /4 .J. MfS; MMP r. ...U

Oct. 15, 1940. Q F. QSGQOD 2,218,491

DRILLING APPARATUS I Original Filed Deo. 18, 1931 3 Sheets--SheetI 3 aaiam Patented oci'. 15.1940

PATENT orifice i piumino. ArrAnA'rUs Chai-les E Osgood, Claremont, N; H., assigner to Massach Sullivan Machinery Company, a corporation of usetts Application December 18, i931. serai No. 581.915

' Renewed January 19, 1937 a `12 claims. (ci. 25e-sn vThis invention relates to drilling. tools and more particularly to improvements indrilling ap- "paratus of the type particularly adapted for use in `conjunction with coal mining apparatus.

-An object of thisI invention is to provide anv improved drilling apparatus. Another object is to provide an improved coal drilling apparatus particularly adapted to use in drilling shot or4 blast holes in a coal race. Still another object is to provide an improved coal drilling tool of the typeparticularly adapted to use `with coal mining. apparatusl whereby, during the cutting operation, a. plurality of shot or blast holesmay be drilled in the, coal i'ace. Still another object Vis to provide an improved coal drill particularly adapted to use with coal mining apparatus of the over-cutting type whereby, when thecoal is being over-cut, a pluralityl oi "shot or' blast holes may` be drilled in the coal face below the cut therein and adjacent the mine floor. lYet another object is to provide improved adjustable supporting means for a' drilling apparatusv of the aforesaid character. 'I'hese and other objects and advantages of the invention will, however, hereinafter more fully appear in the course of the following description and as more particularly pointed out in the appended claims.

In the accompanying drawings there is shown p for purposes of illustration one form which the invention may assume in practice.

In these drawings,

Fig. 1 is a top plan view showing a coal mining apparatus equipped with the illustrative embodiment of the improved coal drill;

Fig. 2 is a side elevational viewvof the mining apparatus and coal-drill shown in Fig. 1;

' Fig. 3 is a vertical sectional view illustrating` sectional viewtaken through the improved -drill` ing tool and illustrating a portion of the improved l tool supporting means;

Fig. 6 is an enlarged detail sectional View taken i substantially on line 6.-6 oi Fig. 1;

Fig. "l is a transverse vertical sectional view taken substantially on line 1--1 of Fig. 5;

Fig. 8 is an enlarged detail sectional `viewnated I is mounted through improved adjustable supporting means 2 on a portable base, herein a coal mining apparatus generally designated 8. 'Ihis coal mining apparatus may assume various forms, but in this particular'instance is of the same general type as that disclosed in the patent to Morris P. Holmes, No. 1,785,961, patented Dec.

23, 1930, and generally comprises a body 4 supported on wheels 5 adapted to run along a mine trackway 6. Supported on the forward end of the body is a rotatable cutter head 1 having pivotally mounted thereon a cutter bar 8. The cutter head 1 is rotatable about its axis relative to the bodyl to position the cutter bar in any de` sired plane about the head axis including horizontal top cutting positions, horizontal bottom cutting positions and vertical shearing positions; `and when the head is positioned as shown in Fig. 2, the cutterA bar 8 is in its overcutting position, that is. in a position to insert an overcut in the coal face a substantial distance above the mine iloor.

Now referring to the improved drilling tool,

Vit* will be noted that secured to the power shaft I0 of the motor of the mining apparatus is a spur pinion I I meshing with a spur gear I2 which in turn drives a bevel gear I3. Meshing with f and driven by the bevel gear I3 is a bevel gear Il keyed to a vertical shaft I5 suitably journaled within a swivel frame I6. This swivel frame supports the drilling tool structure for horizontal swinging movement relative to the mining apparatus about the axis of the vertical shaft I5 to positionV thedrilling tool I Iat opposite sides of the cutter head 1 in the manner shown in Fig. 1. This swivel frame I6 is rotatably mounted on rollers I1 arranged within a circular recess I8 formed in the machine body 4 of the apparatus, and these rollers are retained in position Iby means of an annular retaining plate I9 secured to the body by screws 20. Rotatablymounbedwithin the swivel frame I6 within suitable-bearings 2| is a tubular supporting arm or boom 22 extending horizontally above the top of the mining apparatus and having pivotally mounted thereon at 23 at its outer end an adjustable supporting drilling tool is pivotallymounted to swing about rectangularly related axes 25 and 26. The mechanismior rotating the boom 22 within its bearings erating handles 20, 29- arranged at opposite sides of the swivel frame I6. The swivel mounting for the adjustable supporting arm 24 on the outer extremity of the boom 22 is shown in Fig. 8 and comprises lateral trunnions 3U, 30, herein formed integral with the boom 22 and having journaled thereon at 3l trunnion engaging portions 32, 32 formed integral with the adjustable arm 24. The means for swinging the arm 24 relative to the boom about the axisk 23 comprises a worm gear segment 33 secured to one of the trunnion engaging portions 32 and meshing with a worm 34 journaled within projecting brackets 35, herein formed integral with the boom 22. The worm 34 is secured to a transverse shaft 36 having a manual operating lever 31. It will thus be seen that the boom 22 may be rotated about its longitudinal axis relative to the swivel frame I6 simply by rotating the worm gearing 2l, 28, and that the arm 24 may be swung relative to the boom by rotating the worm 34 meshing with the worm gear segment 33. The worm gearings 2l, 28 and 33, 34 are of the self-locking type and maintain automatically the parts adjusted thereby in their different adjusted positions.

The means for swivelly mounting the drilling tool l on the outer extremity of the arm 2li for swinging movement about the rectangularly related axes 25, 25 is shown in Figs. 5 and 7 and comprises a cylindrical bearing member fill, herein formed integral with the arm 2li and having rotatably mounted thereon at il a circular frame d2 having a cylindrical bearing projection 63. Rotatably mounted within the projection 43 is an inwardly projecting cylindrical bearing portion #35 formed integral with the drill housing d5. The axis 25 is herein preferably arranged at right angles to the boom axis, while the axis 26 extends perpendicularly to the axis 25 and at right angles to the longitudinal axis of the drilling tool. It will thus be seen that the drilling tool may be swung about the axis of the boom 22 and about the rectangularly related axes 25, 26 at the outer extremity of the arm 2d and that the arm 2li may be swung relative to the boom, thereby to enable adjustment of the drilling tool into various angular positions and in any desired plane between the mine roof and the mine floor and in planes at either side of the mining apparatus.

Now again referring to the driving connection between the motor of the mining apparatus and the drilling tool i, it will be noted that the shaft l5, as shown in Fig. 3, is provided with clutch teeth d6 connectible by a sliding clutch Sii to clutch teeth 45 formed on the hub of a bevel gear 59. The clutch 41 is provided with any suitable operating means. The bevel gear 49 is suitably journaled within the swivel housing i6 and meshes with and drives a bevel gear 50 keyed to a transmission shaft 5I extending centrally through and journaled within the boom 22. Keyed to the forward end of the shaft 5l, as shown in Fig. 8, is a bevel gear 52 meshing with a bevel gear 53, herein arranged with its axis coincident with the axis 23 about which the arm 24 is swingable. 'Ihis gear is mounted on a transverse shaft 54 suitably journaled within the trunnions 3U, 30. The gear 53 meshes with a bevel gear 55 keyed to a transmission shaft 56 extending centrally through and suitably journaled within the adjustable arm 24. As shown in Fig. 5, keyed to the outer end of the shaft 56 is a bevel gear 51 meshing with a bevel gear 58 arranged with its axis coincident with the swivel 'axis 25 and suitably journaled on a projecting shaft 59 formed integral with the cylindrical bearing member 43. Rotatable with and driven by the bevel gear 58 is a bevel gear S0 meshing with a bevel gear 6I keyed to a shaft 62, herein arranged with its axis coincident with the swivel axis 26. Secured to the shaft 62 and driven lthereby is a bevel gear 63 meshing with a bevel gear 64 formed integral with a hollow shaft 65. This hollow shaft is journaled within the hubs of spur gears 66 and 6T respectively, and these gears are selectively connectible to the shaft by means of multiple disc clutches 68 and 59 respectively.

Now referring more particularly to the specific structure of the drilling tool l per se, it will be observed that the gears 66 and 61 respectively mesh with sour gears l0 and H formed on alined shafts T2 and 'I3 suitably journaled within the drill housing Q5. The shaft 'I2 is xed to and drives a tubular member 'i4 having xed thereto at 'l5 and arranged centrally therein a feed screw i6. The shaft 13 is fixed to and drives a tubular member Tl telescopically arranged within the tubular member l. The feed screw i6 is telescopically arranged within the tubular member 'l1 and is threadedly connected thereto at 18, The tubular member 'l'l carries at its forward end a usual chuck i9 which receives the usual drilling implement 8l! as shown in Figs. 1 and 2. As shown in Fig. 5, the disc clutches 58, 55 are provided with suitable operating means including clutch applying members 32 and B3 actuated through a rod lll extending centrally through the hollow shaft 55 and having a suitable cam operating mechanism controlled by a lever 86.' interposed between the rod 843 and each of the clutch applying members are coil springs 5l which normally maintain the clutch applying members in clutch applying position and are adapted to yield upon overloading of the clutches. It will thus be seen that when the lever 86 is swung in one direction or the other, the rod 85 is moved axially, thereby causing movement of one or the other or both of the clutch applying members 82, 83 into their clutch applying position. The setsof gears 66, i5 and El, il are of different tooth ratio so that, when the friction clutches 55, 59 are both applied, the tubular members l5, il are rotated at relatively different rates, thereby rotating the feed screw and feed nut at diierent rates to obtain a differential screw feed, and as a result, the drilling implement 55 is fed forwardly at a relatively slow drilling speed. When the friction clutch 59 is released and the clutch 68 is applied, the feed nut remains stationary as regards rotation relative to the feed screw 76, and as a result, the tubular member 'l1 and the drilling implement 80 are fed rapidly forwardly. When the clutch 68 is released and the clutch 69 applied, the feed nut is rotated while the feed screw remains stationary as regards rotation relative to the feed nut, and as a'result, the drilling implement 80 is fed rapidly rearwardly. It will also be evident that due to the arrangement of the various driving gears and shafts relative to the axes of the frame I6, the boom 22 and the swing arm 24 and the rectangularly related axes of the drilling tool, the drill may be driven irrespective of the adjusted positions of the various elements about their respective axes.

As previously mentioned, the drilling tool I is swingable about rectangularly related axes relative to the adjustable arm structure. When it is desired to swing the drilling tool about the axis 26,

2,218,491 a clamp 9ll operated by a set screw 9| is loosened land the di'illhousing 45 may then be swung within the tubular bearing mounting 4I, 44. Simply by tightening the Aclamping member 90, the drill housing may be locked-against swinging movement relative to the swivel frame 42. The drilling tool may be swung about the axis Ar25 by releasing a clamping element 93 threadedly about its axis 25. The drilling tool and the entire adjustable supporting structure therefor is swingable horizontally about the axis of the swivel frame I6, and the means for locking the lparts in their different positions of adjustment comprises, as shown in Fig. 6, a dog 96 mounted in a guideway 91 and having serrations '98 engageable with the periphery of a circular ilange 99 formed integral with the Rswivel frame. I6. Engaging the dog for adjusting the latter in its guide is a set screw I Ul). This dog may be adjusted by the set screw |00 to, lock the swivel frame against swinging movement, and the swivel frame maybe released simply by releasing this set screw.

In the operation of the improved drilling tool `when utilized in conjunction with a coal mining K apparatus, the drilling tool is transported about 'the mine while resting on the top of the `mining apparatus body. When the working place is reached and it is desired to drill a series of blast holes in the coal face adjacent the mine floor during the over-cutting operation, the drilling tool is swung laterally to the ull line position shown in Fig. 1. The cutter head 1 of the mining apparatus is then rotated `about its axis to move the cutter bar 8 into its over-cutting position as shown in Fig. 2. The operator then turns the handle 31 to swing the arm 24 downwardly from its horizontal position to the position shown in Fig. 2, thereby positioning the drilling tool in the manner shown in Fig. 2. It is accordingly evident that during the over-cutting operation,`

a series of drill holes may be drilled in the coal face adjacent the mine floor. If it is desired to drill a series of holes in the coal face at the opposite sides of the mining. apparatus, the boom 22 may be rotated by operating one of the hand levers 29, and thereafter swung laterally to position the drilling tool as-indicated in dotted lines in Fig. 1; It is evident that the drilling tool may be' adjusted to drill holes in the coal face in any desired angular position simply by adjusting the same about the rectangularly related axes 25, 26 atthe outer extremity of the arm 24. If it is desired to drill a series oi holes in the coal face adjacent the mine roof, this may be done by rotating the boom 22 to position the arm 24 and drilling tool in the manner indicated in dotted lines in Fig. 2. l,

As a result of this invention it will be noted that an improved drilling tool is provided particularlyadapted'to use in conjunction with a coal mining apparatus. It will further be evidentthat the improved drilling tool isparticularly adapted to use in drilling shot or blast holes in the coal face adjacent the mine oor when used in conjunction with a mining apparatus oi the over-cutting type. It will still iurther be evident that an improved adjustable sup,-

porting structure is provided for a drilling tool whereby the drilling tool may be adjusted to drill holes in any desired location in the coalv face, it

b'eing possible to adjustthe drilling tool toidrill holes in relatively high planes adjacent the' mine roof, relatively low planes adjacent `the mine floor and in planes at either side of the mining apparatus. These and other uses and advantages of the improved drilling toolwill be clearly apparent to those skilled in the art. Y

While vthere is in'this application specifically described one form which this invention may assume in practice, it will be-understood thatfthis form of the saine is shown for purposes of illustration and that the invention may be modified' and embodied in various other forms without departing from its spirit-or the scope of they appended claims. i

What I claim asnew and desire tosecure by Letters Patent is: p Y

1. In a drilling machine, the combinationwwith a wheeled frame adapted to travel along amine track, of a support pivoted to said 'frame to swing horizontally relative thereto on a vertical axis, an arm pivotally mounted on the outer extremity of said support to swing relative thereto onf an axis extending Ltransversely of said arm. a drilling implement mounted on the outer extremity of saidV arm for adjustmentrelative thereto. on rectangularly related axes one of which is vertical when said transverse axis is horizontalv and said `drilling implement is:in position to drill aA hole at right angles to the workingface extend.- ing across the space in advance of the mine track and said arm is inclined upwardly or 'downwardly, and means for rotating said arm about a horizontal axis extending transversely of said vertical axis and transversely of the aforesaid transverse axis, to invert said drilling implement and maintain said vertical axis when said arm is inclined upwardly or downwardly while said drilling'implement is at right angles to said Working face, whereby said drilling implement may be positioned in one lower corner ofthe working face at right anglesito the latter and closely adjacent to the ribA and closely adjacent -to the mine bottomwhen said arm is inclined track, of a boom mounted on said frame to swing relative thereto on an upright axis and to rotate on a horizontal axis, an arm pivotally mounted on the outer extremity of said boom to` swing relative thereto on an axis extending transversely of said boom axis, a. drilling implement, mechanism for supporting said drilling implement on the outer extremity of said arm for adjustment relative thereto on rectangularly related axes one of which shall be in a vertical plane when vsaid transverse axis is horizontal and said arm is inclined upwardly or downwardly with said,

drilling implement positioned to drill a hole closely adjacent to the rib and at right angles to the working face extendingvacross the space in advance of the mine track, mechanism for swinging said arm on said transverse axis to adjust theposition of said drilling implement,

and means for rotating said'arm on said horizontal axis of said boom to invert said drilling implement, whereby said drilling implement may be positioned closely adjacent to the roof and rib or closely adjacent to the mine bottom and the rib to effect drilling of holes at right angles to said working face.

3. In a drilling machine, the combination with a wheeled frame adapted to -travel along a mine track, of a suppont pivoted to said frame to swing horizontally relative thereto on a vertical axis, an arm pivotally mounted on the outer extremity of said support rto swing relative thereto on an axis extending transversely of said arm, a drilling implemen-temounted on .the outer extremity ofsaid arm for adjustment relative thereto on reotangularly related axes one of which is vertical when-said transverse axis is horizontal and said drilling implement is in position to drill a hole at right angles to the working face extending across the space in advance of the mine track and said arm is inclined upwardly or downwardly, and means for rotating said arm about a horizontal axis extending transversely of said vertical axis and transversely of .the aforesaid transverse axis, rto invert said drilling implement and maintain said vertical axis ,above said arm when said arm is inclined upwardly or lbe'low said arm when the latter is inclined downwardly while said drilling implementls art right angles lto said work-ing face, whereby said drilling implement may` be positioned in .one lower corner of Ithe working'face at right angles .to lthe latter land closely adjacent to the rib and closely adjacent to the mine bottom when said -arm is inclined downwardly and whereby said drilling implement when inverted may be positioned to drill a hole at right angles to said Working face and closely adjacent to the roof when said arm is inclined upwardly.

4. In a drilling maehine, the combination with a wheeled frame adaptedto .travel on a mine track,'of a boom mounted on said frame to swing relative thereto on an upright and to rotate on a horizontal axis, an arm pivotally mounted on .the outer extremity of said boom to swing relative thereto on an axis extending transversely of said .boom axis, a drilling implement, mecha- '4I nism for lsuppm'ting said drilling implement on lthe outer extremity of said arm for adjustment relative thereto on reotangul'arly related axes one of which shall be in a vertical yplaire when said `transverse axis is horizontal and said arm is inclined upwardly orl downwardly; with said drilling implement positioned to drill a hole closely adjacent to the rib :and 4at iight anglesv to the working face extending across thespace in advance of the mine track, mechanism tor swinging `said arm on said transverse @existo adjust )the position of said drilling implementand means for rotating said arm on said horizontal axis of said boom to invert said -drllling implement, whereby said drilling implement may be positioned above said arm closely adjacent rto the roof and rib or below saidarm closely adjacent to the mine bottom and the ribfto eiect drilling of holes at right anglesto said working face.

5. In a drilling apparatus, a portable base, a boom supported thereon and -swlngable horizontally relative tov said base about a vertical axis, an arm pivotally mounted on the outer extremity of said .boom to swing into relatively inclined positionsrelative thereto and also positionable parallel to aline parallel Ito said boom, a drilling tool comprising drill feeding and rotating means and swivelly mounted on the outer extremity of on said base and relative to which said boom is swingable for actuating said drilling tool in any position of the latter.

6. In a drilling apparatus, a portable base, a horizontal boom swivelly mounted on said base and overlying said base and swingable horizontally relative thereto into positions wherein the outer extremity thereof overhang-s the sides of said base, an arm pivotally mounted on the outer extremity of said boom to swing relative thereto, a drilling tool swivelly mounted on the outer extremity of said arm Ito swing relative thereto about an -axis parallel with the pivotal axis of said arm, and a motor on said base and relative to which said boom ls horizon-tally swingable for actuating said drilling .tool in all positions of the latter.

7. In a drilling apparatus, a portable base, a boom swivelly mounted on said base to swing horizontally relative thereto about a vertical axis, an arm structure pivotally mounted on the outer extremity of said boom rto swing from ralinement into inclined positions relative thereto, a drilling implement swivelly mounted on fthe outer extremity of said arm structure to swing relative thereto, and means for swingingsaid arm structure, whenthe latter is inclined relative to said boom, about the longitudinal axis of said boom to position said drilling implementin relatively high and relatively low planes with its swivel axis above and below said arm structure.

8. In a drilling apparatus, a portable base, av

swivelly mounted on the .outer extremity of said arm structure to swing relative thereto about rectangularly related axes, and means for swinging said arm structure, when .the latter is inclined relative to said boom, about the longitudinal axis of said boom to position said drilling implement selectively in relatively high 'or relatively low planes, with one of its swivel axes above the arm structure when said drilling implement is in relatively high planes and'below the arm structure when the drilling implement is in relatively low planes.

9. yIn a track mounted machine, the combination with a wheeled frame having a relatively low overall height adapted to travel on a mine track in a low roof mine chamber, of a horizontal boom rotatable on a horizontal axis and mounted on said frame for adjustment relative to said frame on a vertical axis,` an elongated arm pivotally connected to the outer extremity of said boom for adjustment relative thereto on an axis extending transversely of said boom, a vdrilling implement, means for mounting said drilling implement on. said arm for adjustment relative thereto on'rectangularly related axes one of which extendstransversely of said arm in parallelism at all times to said rst-named transverse axis and the other of which is permanently at right angles to the drilling implement axis and in a common plane with the axisof said boom, means for swinging said arm on said mst-named transverse and holding the same in adjusted position, and means for rotating said boom together with said arm and drilling implement on said first-named horizontal axis to position thev said right angle -axis in a. vertical plane parallel to the working face extending across the space in advance of the mine track.

10. In combination, a wheeled frame adapted to move along a mine track, a boom mounted on said frame for adjustment relative to said frame on rectangularly related axes one of which is vertical and the other horizontal, an elongated arm pivoted to said boom for adjustment relai the space in advance of the mine'track and parallel to the ribs, means for rotating said boom on said horizontal axis to change the position of the drilling implement from a horizontal plane below said arm to a horizontal plane above said arm, and means for swinging saidarm on said transverse axis and holding the same in adjusted position.

11. In a drilling apparatus, a portable base, a horizontal supporting structure supported on and overlying said base and swingable horizontally relative to said base into positions wherein the outer extremity thereof overhangs the sides of said base, the outer. extremity of said supporting v structure being swingable a vertical direction relative to said base, a drilling implement swivelly mounted on the outer extremity of said supporting structure to swing relative thereto about angularly related axes, and means including a motor on said base, relative tol which motor said supporting structure is horizontally swingable, for actuating and effecting feed along the axis thereof of said drilling implement in all positions vof the latter.

12. In -a drilling apparatus, a portable base,

- a boomv swivelly mounted onsaid base to swing horizontally relative thereto about a vertical axis, an arm structure constituting a substantial 'elongation of said boom and pivotally mounted on the outer extremity of said boom to swing into inclined positions relative thereto, a drilling tool'mounted on the outer extremity of said arm structure and comprising drill rotating and feeding meansand supported by said arm structure for disposition in a plurality of positions in each of which it is parallel to the longitudinal axis of the boom and in each of which it liesA in a common vertical plane with said boom axis, and means for swinging said arm structure, when the latter is inclined relative to said boom, about the longitudinal axis of said boom to position said drilling tool in relatively high and relatively low planes above and below said arm structure;

CHARLES F. OSGOOD.

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