US2802641A - Portable drill rig - Google Patents

Description

Aug; 13, 1957- Filed Nov. 19, 1953* J. E. FEUcHT 2,802,641

PORTABLE DRILL RIG 4 sheets-sheet 1 ATTORNEY lAllg. 13, 1957 A J, E, FEUCHT 2,802,641

A PORTABLE: DRILL RIG Filed Nov. 19. 1953 4 Sheets-Sheet 2 www@ Ww A d JNVENTOR. JACOB E. FEUCHT TTO R NEY Aug. 13, 1957 .J. E. FEUCHT 2,802,641

PORTABLE DRILL RIG l Filed Nov. 19. 1953 4 Sheets-Sheet 3 INVENTOR.

JACOB E. FEUCHT BY ,Y

ATTORNEY Aug. 13, 1957 J. E. FEvUcHT 2,802,641

' PORTABLE DRILL RIG Filed Nov. 19, 1953 4 Sheets-Sheet 4 INVENToR. JACOB E. FEUCHT ATTORNEY United States gPatent' PORTABLE DRELL RIG Jacob 'E'. Feucht, Garfield Heights, Ohio, assignor,'by

mesne assignments, to Westinghouse'Air-'Brake Company, a corporation of Pennsylvania ApplicationNovember 19, V1953,SerialNo. 393,156

` 1 Claim. "(Ci. Z55-5.1)

This invention relates broadly to rock drills, but more particularly to a wheel supported movable drill rig especially suitable for carrying vshort leg stopers used for drilling upward holes in mines of relatively low ceilings where the head room is well below mans height.

One object of this invention is to produce an improved portable and readily movable drill rig constructed and arranged in arnanner enabling the drills carried thereby to be moved in a multiplicity of drilling positions.

Another object of this invention is to produce a portable drill rig of simple construction, relatively light weight, which is strong, durable and efficient.

Another object of this invention is to produce an improved portable drill'rig consisting of a wheel carried frame having mounted` thereon two yalike articulated drill supporting beams, through which the drills supported thereby may be readily moved to any desired positions and may be raised or lowered relative to the face being drilled.

Another object of this invention is toprovide such'a Iig with simple and eflicient power actuated means yfor raising or lowering one end portion of the drill carrying beam.

Another object of this invention is to provide suchr an improved rig with simple and eicient manually operable device through which the drill carrying beam may be anchored to the ground.

Other objects of this invention will be apparent from the following detailed description-wherein similar characters of reference designate corresponding parts, and wherein:

Figure l is a plan view of the rear end portion of a wheel carried frame embodying the invention.

Figures 2 and 3 are side elevational views looking in the direction of the arrows 2-2 in Figure l, and illustrating parts of the drill carrying beam in diiferent positions.

Figure 4 is an enlarged longitudinal sectional view taken on line 4-4 in Figure l.

Figure 5 is an enlarged longitudinal sectional View taken on line 5 5 in Figure l.

Figure 6 is an enlarged cross-sectional view taken on line 6-6 in Figure 1 and looking in the direction of the arrows.

Figure 7 is an enlarged longitudinal view taken on line 7-7 in Figure l.

Referring to the drawings, 1t) represents the rear end portion of a base frame supported by three wheels 11, two of which are shown in Figure l, the thirdrwheel, not shown, being preferably a caster wheel having fastened to its supporting yoke a handle through which the rig may readily be moved to any desired location.

Fixed tothe base frame 1t) and extending at right angles therefrom are two coaxial rigid arms 14 each carrying a sectionaldrill carrying beam A of identical construction, about to be described. Fixed to the free end portion of each arm 14 by a clamp unit 15, there is the first section 16 `of the beam A, which section is made `2 of a solid bar of steel and extends at right angles from the arm 14. .By loosening the clamp unit15I which is well known in this art, it will be understood that the first section 16 is movable longitudinally of the frame and capableof pivotal motion on a horizontal axis crosswise of such longitudinal movement. Preferably, each section 16 extends beyond the rear end of the frame 1t) where its outer end is formed by a vertical cylindrical box 17 having mounted in the upper and lower `ends thereof axial thrust bearings 18 in` which is journalled an .arbor in the form ofa trough bolt-19. This bolt has itshead 20 engaging the inner race ofthe lower bearing, and has closely fitted thereon one arm 21 of a U-shaped yoke Z2 constituting the inner end of a second longitudinally extending section 23. The other arm 24 of the yoke 23 is journalled on the'free end of the bolt andmaintained in abutting engagement with the inner raceof the upper bearing 1S l by a nut 25.

kparallel to the arbor 19. At its lower end,l this arbor lis threaded to accommodatev anut.27 acting on a bearing washer 28 seated -on the lower oftwo hat surfaces or seats`29 and 30 machinedy on opposite sidesof the-outer end of section 23. AY bracket 31 Vis pivotally mounted on the arbor-26, and -includes a-bearing box 32 accommodating upper and lower thrust bearingsV 33 journalled lon arbor 26, with the inner race of the lower bearing resting on the upper seat 30 of ,section 23, while the inner race of the upper bearing is engaged by a relatively thick bearing washer- 34retained on the upper threaded end of arbor 26-by a'nut'35.

Bracket y31A isv provided with an'upwardly extending arm 36 ended by across pin 37 on which ispivotally mountedvthe bifurcated inner end 38 of a third orvlast longitudinally extending beam-section 40. Ailuid kactuatedjack' 41 extends diagonally betweenl the lower end of the bracket 31 and the inner end portion of section 40, throughwhich. pivotal movement of this section may be effected. Thisjack includes a cylinder. 42 having a stem 43 extending from itslower end and pivotally connected by across pin 44 to a bifurcated lug V45 which vextends laterally from the lowerv end portion of bracket 31. The upper end of cylinder 42 is closed by a cap 46 having slidable therethrough a piston stem 47 carrying on its inner end a piston head 48 slidable within the cylinder 42, and having its outer end pivotally connectedy to the underside of section 40 by a crosspin 49. Motive fluid may be supplied to the lower side'of the piston head V48 through a conduit 5t) controlled'by athrottle valve '51 (Fig. l) mounted on the upperside of section A16, while the other side of piston head 48Ais'constantly vented through a port 52 provided in thepiston stem 47.

The last sectionv 40which is alsomade of bar stock, has its outer end formed by. a transversal cylindrical portion 54 havinga bore'55 extending therethrough and formed with parallel annular end surfaces 56. A cap 57 is tted within one end vportion of the bore 5S, and has an external annular flange 58 resting against one of the end surfaces 56. A similar cap'59 is fitted in the other end portion of the bore 55,l and has an external annular flange 60 engaging the other annular end surface 56. A U-shaped yoke 61k has side arms 62 closely fitted over the caps 57 and 59 and pivotally connected to the outer end ofthe third section 40 by a cross bolt 63 extending through the borel 55 and caps 57 and 59. Cap 59 has a llat bottom cylindrical recess 64 accommodating a compression vspring 65, the compression of which can be varied by a nut 66 and collar 67, the latter being free to slide in the outer end portion of the recess 64. The caps 57 and 59 are locked to the yoke 61 against relative rotation by keys 68 formed as integral parts of the cap anges and fitted within appropriate key-ways in the arm 62.

Yoke 61 has a depending lug 69, fixed by bolts 7i) to a tongue 71 extending laterally from a tubular casing 72. This casing normally extends vertically or at right angles from the third section 40, but is offset therefrom as clearly shown in Figure l. It has a closed upper end and opened lower end, and has telescopically mounted therein outer and inner tubular anchoring members 74 and 75. The outer member has its external wall previded with a plurality of longitudinally spaced annular grooves 76, each adapted to receive a locking finger 77 formed eccentrically on the head 78 of a plunger 79, which is slidable and rotatable within a cylindrical recess 80 extending radially from the interior of casing 72. A compression spring 81 urges the plunger inwardly, and a handle 8.2 enables the plunger to be pulled or rotated in the recess 80. The lower end of the outer anchoring member 74, which always protrudes from the lower end of casing 72, is of reduced diameter and carries in a cross hole 53 a removable cross pin 83, normally retained in place by a sliding collar 84 urged in retaining position by a compression spring 85. The inner anchoring member 75 is provided throughout its length with a plurality of longitudinally spaced apertures 86 extending radially therethrough and adapted to receive the cross pin S3. Its lower end is made solid and pointed as at 73 for engagement with the ground.

A relatively heavy and rigid foot piece 87 is fixed, by means of a weld or the like, to the lower end of the casing 72 and extends radially therefrom as clearly shown in Figures 2 and 3. Its outer end portion is provided with a vertical bore 88 in which is rotatably fitted the lower end of an upright or piston rod 89, retained therein by a cross pin 90 fitted in an annular groove 91. The upper end of the piston rod 89 is reduced and threaded to accommodate a nut 92 by which a piston head 93 is fixed on the upper end of the rod 89. This piston is slidable within a vertical feed cylinder 94 normally resting on the foot piece 87. This cylinder, which is free to rotate on rod 89, has its lower end portion in guided engagement with the rod 89 and is constantly vented through a port 95, while its upper end is closed by a removable cap 96. A uid actuated stoper or rock drill 97 is fixed to the feed cylinder 94 for movement therewith by upper and lower cross arms 98. This rock drill is parallel to but oset from the cylinder 74 and is provided with the usual connection 99 through which pressure fluid may be admitted to the drill and therefrom to the upper end of the feed cylinder by any suitable means, such as a passage 100.

From the foregoing description, it will be understood that the drilling apparatus, including feed cylindrer 94 and rock drill 97, is pivotable on three vertical axes indicated by lines B-B, C-C and D-D inFigure 2 and on two horizontal axes indicated by lines E-E and F-F in the lower end of Figure l, thereby enabling the drilling apparatus to be swung, while being supported off the ground, to a multitude of drilling positions. The area within which each drill is thus positionable for each setting of the base frame 10, may be described as a fraction of a circular area extending from the back end of the base frame 10 to the outer side of the iirst section 16, or in other words, an area extending substantially 270, and having as its radius the distance between axis B-B and the center axis of the rock drill 97. With two beams A extending rearwardly of the base frame as shown in Figure l, the drill of each beam can'be positioned individually of each other within the area above referred to, thereby enabling a wide range of drilling operations for each setting of the base frame 10.

In practice, the feed mechanism 94 is intended to feed the drill upwardly as the drilling operation proceeds, by admitting pressure uid, from any available source, to the upper end of the feed cylinder 94 through passageway 100. The distance the rock drill 97 may thus be raised is calculated to be the greatest possible when used in very close quarters where the head room is at a minimum. In such instance, the anchoring members 74 and 75 within the tubular casing 72 will first be retracted as shown in Figure 6, and subsequently 'the third section 40 pivoted downwardly until the pointed end 73 of the inner member 75 is anchored in the floor of the mine. When drilling in locations of greater head room, if the entire or maximum feed is to be obtained, it is first necessary to raise the drilling apparatus so that the complete feed travel of the drill will bring its front end near the face being drilled. To that end, pressure uid is admitted to the jack 41 through conduit 5t) controlled by throttle valve 51, thereby causing upward movement of the third section 40 on its horizontal axis E-E, and upward movement of the drilling apparatus. Once the apparatus is at its desired height, and before starting the drilling operation, it is desirable to support the entire free or outer end of the beam by lowering the telescopic anchor leg 74-75 into operative position. This may be accomplished by retracting the iinger 77 from the grooves 76 of the member 74 and allowing both members 74-75 to drop into engagement of the pointed end 73 with the ground. The same anchoring action may be obtained by retracting the collar 84 against the spring 85, removing cross pin 83, and allowing the inner member 75 to drop, relative to the outer member 74, into engagement of the pointed end 73 with theV ground. Thereafter the cross pin 83 may be reinserted into cross hole 53 and one of the apertures 86 in registry therewith. When the outer member 74 is not engaging the upper end of the casing 72, registration of cross hole 53 with the nearest aperture 86, may be effected by rotating handle 82 which through the eccentric linger 77vin one of the grooves 76, causes axial movement of the outer member 74 into registry of its cross hole 53 with one of the apertures 86.

The pivotal connection between the outer end of section 40 and the tubular casing 74 accommodating the anchoring leg, is of the adjustable friction type, which, when the anchoring leg is not in operative position, is sufficient to maintain the drilling apparatus in a set position. However, when desired, such as when restoring the drilling apparatus to a vertical position after having been raised or lowered through pivotal movemnt of section 49, the casing 72 andV drilling apparatus may be moved manually about axis F-F As clearly shown in Figure 6, since the caps 57 and 59 are keyed tothe arms 62 of the yoke 61, compression of the spring 65 through collar 67 and nut 66, will create frictional engagement of the annular anges 5? and 6i? with the end walls 56 of the leg 40, which frictional engagement can be regulated to be sufcient for maintaining the parts carried by the yoke 61 in a fixed position, but enabling pivotal movement of such parts when manual forces are applied thereon.

When the drill rig is moved on its wheels 11 to different drilling positions or different sections of the mine, the articulated beams A, or more particularly the several sections thereof, can be folded on each other, to form a compact readily movable rig.

The details of structure and arrangement of parts shown and described may be variously changed and modified without departing from the spirit and scope of the invention.

I claim:

A drill rig including a base frame, a sectional beam carried by said frame extending horizontally therefrom, said beam including a iirst section having one end fixed to said frame, a second section parallel to said iirst one, a connection between the other end of said irst section and one end of said second one enabling pivotal movement of said second section on a vertical axis, a third section, connecting means between the other end of said second section and one end of said third one enabling pivotal movement of said third section on both vertical and horizontal axes, power means associated with said third section adapted to impart pivotal movement thereto on one of said axes, a casing depending vertically from the other end of said third section, a ground engaging 5 member slidably carried by and depending from said casing capable of anchoring said other end of said third section in any of its positions possible by Virtue of said pivotal movements on all of said axes, and a drilling apparatus carried by said casing alongside thereof. 10

References Cited in the le of this patent UNITED STATES PATENTS 1,026,295 Arndt et al. May 14, 1912 15 6 Levin Apr. 12, Curtis Ian. 4, Feucht July 16, Curtis May 27, Moon Sept. 9, Dick Nov. 4, Moon Oct. 20, Gillerstrom Dec. 1, Curtis Mar. 2,

Bissell et al Oct. 5,

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