US552556A - Rock-drilling machine - Google Patents

Description

ma Model.) r 3 Sheets- Sheet 1. J. M. VAN HORN 8v G. H. HAYES.

m M a w W m E m? 0% G m K AN DREW B GRAHAM. PHOTO-UTHQWASHINGION. D.C.

(No Model.) 3 Sheets-Sheet 2. J. M, VAN HORN 85 G. H. HAYES. ROGK DRILLING MACHINE.

No. 552,555. Patented Jan. 7,1896.

- Then P W 1 ANDREW BARMIAMPHOTD-LITHQWA5HINGTDNJI.

(No Model.) 3 sheets-sheets. J. M. VANHORN & G. H. HAYES. ROCK DRILLING MACHINE Patented Jan. 7, 1896.

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H STATES ATENT 0- Erica.

JAMES M. VAN HORN AND GEORGE II. HAYES, OF LOOKWOOD, MISSOURI.

ROCK-DRILLING MACHINE.

FSZEEOIIFIGATION forming part of Letters iatcnt No. 552,556, dated January 7, 1896.

Application filed March 2 6, 1 89 5.

To all whom it may concern:

Be it known that we, JAMES M. VAN HORN and GEORGE II. HAYES, citizens of the United States, residing at Lockwood, in the county of Dade and State of Missouri, have invented cer tain new and useful Improvements in Rock- Drilling Machines, of which the following is a specification, reference being had therein to the accompanying drawings:

Our invention relates to improvements in power-drills.

Our invention belongs to that class of powerdrills in which the drill in operation produces a circular channel in the rock.

The object of our invention is to provide a chann cling-drill driven by power in which one or more drills are mounted upon a table which is given circumferential motion through mechanism operating in connection with the mechanism that imparts the reciprocating motion to the drill or drills, thus causing the drill or drills carried by the revolving table to describe a circle and at the same time to produce a continuous circular channel in the rock that is being drilled.

Our invention further provides means for drilling a hole in the center of the circular channel made by the drills mounted on the revolving table.

Our invention consists also in certain new features of construction hereinafter fully described.

In the accompanying drawings, illustrative of our invention, Figure 1 represents a front elevational view. Fig. 2 represents a side ele- Fig. 3 represents a vertical sectional view of one of the drills and its reciprocating mechanism. Fig-4. represents a central vertical sectional view of the central portion of the machine. Fig. 5 represents a plan view of the ratchet-wheel. Fig. 6 represents a perspective view of the pawl and pivoted arm. Fig. 7 represents a perspective view of a wrench used in operating the mechanism for feeding the drill. Fig. 8 represents a plan view of the revolving table. Fig. 9 represents the splicing ends of a modified form of cable used in communicating power to the drilling-machine. Fig. 10 represents a side view of pulley used with the cable shown in Fig. 9. Fig. 11 represents a plan sum No. 543,281.

(No model-l view of the machine with the central drill and operating-rope omitted.

Similar numerals of reference indicate similar parts.

1 represents a vertical tubular supportingshaft, at the lower end of which is secured centrally a horizontal spur gear-wheel 2. The said gear-wheel is provided with a vertical opening in its hub, in which is fitted the tubular shaft 1. A table 3, consisting of two horizontal rectangular arms 4:, connected by parallel arms 5, extending transverselybetween the arms 4, is centrally mounted upon the shaft 1 just above the gear-wheel 2. The said table 8 is provided with a central vertical opening 6, movably fitted to the shaft 1. The weight of the table 3 is supported by two rollers 7,each one of which is revoluble in bearings in the bracket 8, secured to the under side of one of the cross-arms 5, immediately above the periphery of the spur-gear 2. When the table 3 is revolved the rollers 7 rest upon the upper surface of the gear-wheel 2. The gear wheel 2 is provided with three vertical screwthreaded openings into which are fitted screwthreaded bolts 9. The bolts 9 are located at equal distances from the center and from each other, and serve as a support for the gearwheel 2. By operating the bolts 9 upon the rock bottom of the shaft the gear-wheel 2 may be kept in a horizontal position regardless of any inequalities of the surface of the rock upon which the machine rests.

A rectangular horizontal platform 10, provided with a central vertical opening is rigidly secured to the upper end of the tubular shaft 1, the said tube being fitted to and passing through the central opening in the platform. Revoluble upon the tube 1, between the table 3 and the platform 10, is mounted a double-bevel horizontal gear-wheel 11, the upper and lower sides of which are provided with bevel gear-teeth. Between the gearwheel 11 and the table 3 a collar 12 is fitted upon the tubular shaft 1. This collar serves to support the gear-wheel 11. Meshing with the teeth on the under side of the gear-wheel 11, and diametrically opposite each other are two smaller gear-wheels 13 and 14, which are secured rigidly to the inner ends respectively of the horizontal revoluble shafts 15 and l6.

These shafts and 16 lie in the vertical plane of a line drawn through the longitudinal center of the table 3, and are provided near their respective ends with bearings 17, mounted upon the upper side of the table 3, the outer bearings being located near the outer ends of the table and the inner bearings located c011- tiguous to the gears 13 and 14 respectively.

Upon the outer end of each of the shafts l5 and 16 is rigidly secured a crank-disk 18, provided with a crank-pin 19, eccentrically secured to the outside of the crank-disk in any suitable manner. The lower end of an upwardly-extending pitman 21 is provided with a transverse opening fitted upon the crank-pin 19. The upper end of the pitman is pivoted in a bracket 22, centrally secured to the under side of a horizontal rectangular plate 23. Between the pitman 21 and the crank-disk 18 and mounted upon the crankpin 19 is a collar 20. Above the plate 23 and parallel therewith is a plate similar in size and shape to the plate 23, designated by 24. Connecting each plate 23 and 24 are two ver tical rods 25, the lower ends of which are secured respectively in vertical openings located near the ends of the plate The upper ends of the rods 25 are similarly secured at their upper ends to the plate 24. A plate 26, located between the plates 23 and 24 and parallel therewith, is provided with two vertical openings through which pass respectively the rods 25. The said openings in the plate 20 are of a size to permit the free vertical movement of the plate upon the rods. Encircling each rod 25, between the plates 24 and 26, is a coil-spring 27, which is given a tension adapted to force the two plates apart. Rigidly secured in a central vertical opening in the plate 26 is the lower end of a vertical rod 28, the upper end of which is squared and is movably fitted in a square vertical opening centrally located in the hub of a horizontal wheel or disk. 29. The hub of the disk 29 extends above and below the said disk, the portion on the lower side being revoluble in a vertical opening in an outwardly-projecting horizontal arm 30, located at the upper end of a vertical square rod 31, the lower end of which is rigidly secured between the upper ends of two arms 32. From the rod 31 the two arms diverge downwardly, their lower ends being secured to the sides respectively of the table The part of the rod 28 immediately below the squared part is externally screw-threaded and is fitted to the internally-screw-threaded vertical opening in a slide-block 33, preferably a cast piece of metal, the inner end being provided with inwardly-extending horizontal projections 34, located one above the other and each provided with a vertical square opening movably fitted upon the rod 31. The outer end of the casting 33 is provided with a vertical transverse flange 35, to which the drill 36 is secured. The flange is provided with two horizontal openings extending transversely therethrough in which are fitted the inner ends, respectively, of a U-shaped hori zontal clamp 37, which partially encircles the vertical drill-rod 36. The inner ends of the clamp 37 are screw-threaded and are provided with two nuts,respectively,which,when tightened, serve to hold the drill securely against the outer surface of the vertical flange 35. The upper end of the drill 36 is guided in a peripheral groove in a horizontal transverse roller 38, pivotally mounted between the bi furcated outer end of the projecting arm 30. The lower end of the drill is guided by a peripheral groove in the center of a horizontal roller 39, pivotally mounted at its ends in the extreme outer ends of the plates 4 of the table 3. The disk 29 is provided around the periphery of its upper surface with several vertical pins 40. A wrench 41, (shown in Fig. 7,) consisting of a flat plate having an enlarged part at one end, is provided in its enlarged end with a vertical opening adapted to the upper end of the hub of the disk 29, and the handle sufficiently small to be placed between the pins 40 of the disk 29. By revolving the wrench when so placed the disk 29 is revolved and the screw-threaded rod 28 is also revolved, thus raising or lowering the slide-block 33 according to the direction the rod 28 is turned. The rod 28 is revolved when it is desired to feed the drill downward or when it is desired to raise the drill so that the stroke is not so deep.

The lower end of the hub of the disk 29 is screw-threaded and is provided with a nut 41 adapted to be screwed tightly against a shoulder on the hub immediately above the screw-threaded portion, thus preventing any vertical movement of the disk 29 when the rod 28 is reciprocated vertically.

A bevel gear-wheel 42, meshing with the teeth in the upper side of the gear 11 and to the right of the shaft 1, as seen in Fig. 1, is rigidly secured upon a horizontal revoluble shaft 43, extending parallel to the shaft 16 as viewed in that figure. The shaft 43 is provided with bearings 44, secured to the under side of the platform 10, and has secured to it at the right of the gear 42 a grooved pulley 45, which is made to revolve by means of a rope or cable 46 which connects the pulley 45 with a pulley upon the driving-shaft of the motor or engine used in working the drillingmachine.

The cable 46 is a continuous rope and may be made in sections, each of which is provided with a knot at one end, as indicated by 47, and a loop 48 at the other end. WVhen it is desired to lengthen the cable, as for the purpose of letting the drilling-machine down in the shaft farther, the knot 47 of the new section is slipped into the loop of a section already a part of the driving-cable and the knot at the other end of the cable is slipped into the loop 48 in the other end of the new section. The pulley 45 may be made with openings in the grooved periphery to receive ICC IIC

the knots 47 and round collars 50, secured in the usual manner at equal distances along the cable.

The drills at the end of the table 3 called the channeling drills are operated as follows: Motion is imparted to the rope 46, thus revolving the shaft 43 together with the gear 42, which in turn causes a rotation of the shafts and 16 through the intermediacy of the gears 11, 13 and 14. The cranks 15 and 16 in revolving rotate the crank-pins 19, thus reciprocating vertically the drills 36 through the intermediacy of the pitman 21, plates 23, 24: and 26, springs 27, rod 28, slide-block 33 and clamp 37. We will now describe the mechanism for rotating the table 3 and parts car ried thereby. Meshing with the teeth of the gear-wheel 2 is a small spur gear-wheel 51, which is secured rigidly to the lower end of a vertical shaft 52, revoluble in a vertical opening in one of the transverse plates 5 of the table 3. To the upper end of the shaft 52 and above the surface of the table 3 isrigidly secured a horizontal worm-wheel 53,which engages the threads of a horizontal worm 54, which is provided with a longitudinal central opening in which is fitted the shaft 16, to which the worm is rigidly secured. l/Vhen the shaft 16 is revolved, as hereinbefore described, the worm is rotated, thus rotating the worm-wheel 53 and its shaft 52, together with the small gear-wheel 51. Inasmuch as the large gear cannot move, the revolution of the gear 51 causes the table upon which it is mounted to revolve. The revolving of the table 3 and at the same time the reciprocating vertical movement of the drills 36 will cause a continuous circular channel to be drilled by the drills, providing the feeding mechanism hereinbefore described is oper ated so as to lower the drills as the rock is cut away.

The following is a description of the mechanism for operating the central drill: Abevel gear-wheel 55, meshing in the gear 11 at a point diametrically opposite to the gear 42, is secured rigidly upon a horizontal shaft 56, which is provided with bearings 57 secured to the under side of the platform 10. The said shaft 56 is in the same vertical plane as the shaft 15, as shown in the position illustrated in Fig. 1. To the right end of the shaft 56, as seen in Fig. 1, is rigidly secured a grooved pulley 58, which is connected by means of a rope 60 to a grooved pulley 59, which is rigidly secured to a horizontal shaft 61. The shaft 61 is parallel to the shaft 56 and the shaft 43, and is mounted in horizontal openings in the upper ends of two vertical arms 62, which are located in the rear of the shaft 1, as seen in Fig. 1, and are secured at their lower ends to the platform 10. To the extreme right end of the shaft 61, as seen in Fig. 1, is secured a crank-disk 63, to the right from which projects a crank-pin64, adapted when the disk 63 is revolved to engage a crank-arm 65, which is pivoted upon the right end of the shaft 61, and cause it to revolve with the crank-disk 63. Pivotally connected to the crank-arm 65 is a link 66, consisting of a flat plate provided at one end with an opening movably fitted to the said crank-arm and at the other end with an opening in which is secured the end of a rope 67, which passes over a pulley 68 mounted in a swivel-bracket 69, pivotally connected to the center of a transverse brace 7 2, which extends across the shaft between the walls 75. Each end of the transverse brace 7 2 is provided with a downward projection 73, which is provided with a horizontal opening internally screw-threaded, in which is fitted a screw-threaded bolt 74 adapted to be screwed into the wall 75 of the shaft. The other end of the rope 67 is connected to a semicircular ring 76 attached at its ends to a horizontal disk 77. The disk 77 is provided with a vertical central opening in which is fitted movably the upper end of .a vertical drill 79. The upper end of the drill 79 is screw-threaded and is provided with a nut 78, designed to hold the disk 77 to the drill. The drill 79 is polygonal in shape and is fitted to a similar shaped opening in the hub of a horizontal ratchet-wheel 80, which is provided with teeth in the upper periphery. The

:said ratchet-wheel 80 has its hub extending above and below. The lower part of the hub below the wheel is fitted to the opening inthe shaft 1 and revoluble therein. A pawl arm 83, consisting of a flat plate horizontally disposed and provided with an enlarged end 86, has the said enlarged end provided with a vertical opening adapted to the upper end of the hub of the ratchet-wheel 80. To the left side of the pawl-arm 83, as shown in Fig. 11, are projections 84, between which is pivoted a pawl 85, that engages the teeth of the ratchet-wheel 8 0. Connecting the pawl-arm 83 and the crank-arm 65 is a pitman 87, one end of which is provided with an opening adapted to fit over the crank-arm 65, and the other end being provided with a hooked portion which passes through a vertical opening in the end of the pawl-arm 83. The sides of the opening in the centerof the hub of the ratchet-wheel 80 are provided with two diametrically-opposite grooves 82, as shown in Fig. 5. These grooves extend the full length of the hub and serve to allow the passage of the widened lower end of the drill 7 9 through the vertical opening in the hub of the ratchetwheel 80.

Through a vertical opening in the brace 7 2 in each side of the center of the brace passes a rod 88, the upper and lower ends of which are externally screw-threaded. Upon the rod 88 at its upper end are fitted the nuts 89 and 90, one being above and one below the brace respectively. These nuts are screwed tightly against the brace and serve to secure the brace to the rod 88, and also to secure vertical adjustment of the rod in the opening in the brace. The lower end of the rod 88 passes through a vertical opening in the platform 10,

IIO

and is provided with the nuts 91 and 92, which are located respectively one above the platform and one below the same, and serve to secure the rod to the platform and at the same time to permit of vertical adjustment of the rod in the opening in the platform. In order to allow of the drill 79 being raised or lowered, we have provided a take-up for the end of the rope 67, which passes through the link 66. The take-up consists of a rectangular flat plate 93 provided near each end with an opening. The rope 67 is passed through one opening, then through the opening in the link 66 and then through the other opening in the plate 93. By taking the weight of the drill from the rope the rope may be drawn either way, thus taking up or letting the drill have more rope. As soon as the weight of the drill comes on the rope it takes the position shown in Fig. 1, and thus prevents the rope from slipping.

We will now describe the operation of the mechanism for operating the center drill. V7 hen the gear-wheel 11 is revolved it causes a revolution of the shaft 61 through the intermediacy of the pulley 59, endless rope 60, pulley 58, shaft 56 and gear-Wheel 55. The shaft 61 in revolving rotates the disk 63, thus causing the pin 64: to come in contact with the crank-arm 65, drawing the rope 67 downward and raising the drill 79. As soon as the crankarm passes a certain point on its downward stroke it is released from engagement with the pin 64, and the weight of the drill pulling on the rope causes the crank-arm to fly around in advance of the crank-pin 64. and allowing the drill to fall by its weight. The crank-pin 64 during its revolution again picks up the crank-arm 65 and the operation is repeated.

It will be seen from this description that the machine will drill a circular channel and a central vertical opening at the same time. After a sufficient depth has been reached for a blast to be made the bolts 74 are withdrawn from the wall 75, and the entire machine is drawn out of the shaft by means of a rope connecting the ring in the center of the brace 72 and a hoisting device located at the top of the shaft, and which is not a part of this invention. A charge of some suitable explosive is then placed in the central opening and discharged.

The circular groove drilled in the rock allows the entire part of the rock out out to be thoroughly broken by the single charge placed in the central opening, and consequently permits of much less exploding material being used than is used in the methods commonly employed. At the same time a smooth circular shaft is made in the rock. After the dbris has been cleared from the bottom of the shaft after an explosion the machine is lowered into the shaft in the same manner as that employed in raising it from the shaft.

The bolts 9 are adjusted to suit the new surface of the bottom of the shaft in the manner hereinbefore described. The brace 72 is secured to the walls in the way described, and any adjustment of the rods connecting the brace and the platform in order to secure a firm setting of the machine is then attended to.

It is obvious that numerous modifications of our invention may be made without departing from its spirit. We do not confine ourselves to the particular construction shown, nor to any particular materials used in its construction, but much latitude may be permitted in the construction while yet remaining in the purview of our invention.

Having thus described our invention, what we claim, and desire to secure by Letters Patent, is

1. In a rock drilling machine, the combination with a vertical tubular shaft, of a drill operating therein, a framework revolubly mounted upon the vertical shaft, one or more drills vertically movable upon the frame work, and operating in a circle in the center of which is located the drill which is in the tubular shaft, means for revolving the framework, and means for operating the several drills, substantially as described.

2. In a rock drilling machine, the combination with a central vertical shaft, of a horizontal gear wheel secured to the lower end of the said shaft, a framework revoluble upon the said gear wheel and around the central shaft, a pinion mounted upon a shaft secured to the frame work, the said pinion meshing with the gear wheel, a drill adapted to be reciprocated vertically upon the frame work and carried thereby, and means for operating the drill and revolving the pinion shaft, whereby the frame work is made to revolve at the same time the drill is reciprocated, substantially as described.

3. In a rock drilling machine, the combination with the frame work, of a vertical tubular shaft around which the frame work is revoluble, the drill, 79 located within the tubular shaft, the drills, 36, mounted upon and vertically movable upon the frame work, the gear wheel, 2, the pinion, 51, mounted upon a vertical shaft to the upper end of which is secured a worm wheel, 55, the worm, 54, the horizontal shaft, 16, mechanism connecting the shaft, 16, with the drill, 36, and means for rotating the shaft, 16, whereby the frame work is rotated and the drill 36, is reciprocated, substantially as described.

In testimony whereof we affix our signatures in presence of two witnesses.

JAMES M. VAN HORN. GEORGE H. HAYES.

Witnesses:

BENJ. F. GRUNDY, BEN. M. NEALE.

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