US2165853A - Mounting for rock drills - Google Patents

Description

July 11, 1939. D. w. HART 2,165,853

i MOUNTING "For: `Rock: DRILLs Filed Feb. 18, 1957. 2 sneets-sheet 1 HI 5 ATTORNEY.

D. w. HART MOUNTING FOR ROCK DRILLs July 11, 1939.

- Filed Feb. 1s, 1937 2 sneetssheet 2 4M. q Rm o a# l HIS ATTORNEY.

PatentedJuIy 11, 1939 UNITED STATES PATENT GFFICE Application February 18, 1937, Serial No. 126,412

6 Claims.

This invention relates to mountings for rock drills, and more particularly to a wheel mounting capable of being readily transported to and from the Wo-rk.

One object of the invention is to enable the rock drill to be expeditiously and conveniently disposed in position for drilling either vertical or inclined holes.

Other objects will be in part obvious and in part pointed out hereinafter.

In the accompanying drawings and in which similar reference numerals refer to similar parts,

Figure 1 is a front elevation, partly broken away, of a mounting constructed in accordance with the practice of the invention,

Figures 2 and 3 are transverse views taken through Figure 1 on the lines 2-2 and 3--3 looking in the directions indicated by the arrows,

Figure 4 is a side view, in elevation, of the mounting, i Y

Figure 5 is a transverse view taken through Figure 4 on the line 5 5,

Figure 6 is -a View taken through Figure 5 on the line 6--6, and

Figure 'l is a view taken through Figure 1 on the line 1-1.

Referring more particularly to the drawings, the mounting, constructed in accordance with the practice of the invention and designated by 28, comprises a main frame 2|, a pair of co1- umns 22 supported by the main frame and wheels 23 and 24 to support the mounting.

In Vorder to prevent unauthorized shifting of themounting from a desired position the main frame is provided with a series of bearings I8 to accommodate pins I9 which engage the surface of the material supporting the mounting. Preferably a shaft I1 is secured to the mounting adjacent the wheel 24 to provide a grip member which the operator may grasp for moving the mounting from one drilling site to another.

The main frame 2l is of substantially U-shape of which the side members 25 are arranged in parallelism and serve as supports for bearings 26 on the lowermost end of the columns 22. The bearings 26 are slidable along the members 25 and are provided with clamping plates 21 and bolts 28 whereby they may be clamped to the members 25. y

The columns 22 are preferably disposed perpendicular to the main frame and serve as guides for bearings 29 on the ends of a hollow tool supporting member or bar 30 which is preferably of U-shape and the intermediate portion 3l of which serves as a pivot for a guide frame 32 supporting a rock drill 33, the guide frame 32 being provided with clamping mechanism 34 which grips a cone I 6 carried by the guide frame for clamping it to the bar 30, as is more particularly illustrated in Figure 2. 5

The clamping mechanism may be of well known type comprising a pair of grip members I5 and I4 to engage the cone I6. The members I5 and I4 are pivotally connected together, as by a pin I3, and the pressure employed for clamping the l0 v members I5 and I4 to the cone I6 may be applied by a nut I2 acting against the member I4 and threaded on a bolt II anchored tothe member I5 and extending through said member I4. In the side of the member I5 is a partly-cylinl5 drical recess I0 to receive the bar 30, and a yoke 9 actuated by nuts 8 threaded on bolts 1 and which bolts may be carried by the member I5 serves to secure the clamping device 34 to the bar 30.

In the bearings 29 are apertures 35 to slidably receive the columns 22, and adjacent the bearings 29 are clamps 36 of which the inner surfaces 31 conform to the contour of the columns 22. The clamps are pivoted at one end, as by a pin 25 38, to the bearings 23, and in the opposite ends of the clamps are slots 39 to receive eye-bolts 46 pivotally mounted on pins 4I seated in the bearings 29. The eye-bolts carry nuts 42 for forcing the clamps 36 into firm gripping engage- 30 ment with the columns 22 to hold the bar 30 fixedly in position on the columns.

In order that the bar 3|] may be readily lowered and raised on the columns 22 to enable the rock drill to be placed in an inclined position, as illustrated in Figure 4, or in a vertical position, as shown in Figure` 1, the mounting is provided with an actuating device of which an example is more particularly illustrated in Figure 1 and shown as comprising a pair of drums 43 and 44 40 keyed to a shaft 45 journalled in the bar 30. Interposed between the drums 43 and 44, and keyed to the shaft 45, is a worm wheel 46 meshing with a worm 41 having shaft portions 4B 'and 43 seated in the bar 30. 'Ihe shaft 49 ex- 45 tends exteriorly of the bar 30 and carries a crank 50 whereby the worm 41 and thus the drums 43 and 44 may be rotated.

Extending through the bar 30 and trained over guide rollers 5I within the member30 is a flex- 50y ible member, as for example a cable 52, which is wound upon the drum 43 and an end is anchored to a take-up device shown as an eyebolt 53 which extends through a bracket 54 mounted upon a. column 22. A nut 55 threaded 55 on the bolt 53 and seating upon the upper surface of the bracket 54 serves to adjust the bolt 53 to maintain the correct tension on the cable 52.

To the end that both bearings 29 may be shifted along the columns 22 with a minimum degree of friction between their cooperating surfaces a cable 56 wound upon the drum 44 is anchored to aneyegbolt 53 supported by the other column 22;*-a'nd adjustment of the eye-bolt is effected in the manner of that connected to the cable 52.

The guide frame 32 and the rock drill 33 may be of conventional construction, it. being understood that the rock drill 33A is slidably interlocked with the guide frame so that it may readily be moved toward the work or retracted therefrom. Such movement of the rock drill with respect to the guide frame may be eiected by any suitable actuating device, as for example a drum 51 and a cable 58 of which an end is secured to the rock drill 33.

In operation, whenever it is desired to drill vertical holes the tool supporting member is raised, by means of the drums and cables, along the columns 22 until the guide frame 32 may be placed in a vertical position. The clamps 36 are then firmly clamped to the columns 22 and will support the weights of the bar 30 and the elements carried by the bar. The rock drill V33 may then be set in operation and will descend along the guide frame 32 in accordance with the penetration of the working implement into the rock.

When used for drilling vertical holes the columns occupy positions closely adjacent the Wheels 23 in order that the holes may be drilled closely to a vertical rock face. Should it be desired, however, to drill inclined holes into the base of a ledge the plates 2l are loosened and the columns 22 are moved along the members 25 in the direction of the wheel 24 and again clamped securelyto the members 25. The clamps 36 are then loosened to permit free movement of the bearings 29 on the columns 22 and the drums 43 and 44 are rotated to lower the tool supporting member 3U and the guide frame 32 may then be inclined to the desired position.

After the guide frame and the rock drill have been correctly positioned the clamping devices 36 and 34 are again tightened to render the entire device rigid for a subsequent drilling operation.

I claim:

1. A mounting for rock drills, comprisingv a frame, columns on they frame, a tool supporting member slidableon the columns, flexible means on the columns and in the tool supportingmember, means for connecting each extremity of the flexible means to thev mountingpmeanswithin the tool supporting member to guide kthe flexible means andV seat upon an intermediate portion thereof, guide means on the tool supporting member adapted to guide longitudinal movement of the rock drill with respect to said member, a drum for Winding in any paying out the flexible means to raise and lower the tool supporting member, and means carried by the tool supporting member for clamping said member to the columns.

2. A mounting for rook drills, comprising a frame, columns on the frame and being slidable thereon, a tool supporting member, bearings on the tool supporting member slidable on the column, flexible members on the columns having portions thereof lying within the tool supporting members, means in the tool supporting member to guide the ilexible means, a drum in the tool supporting member to wind in and pay out the flexible means for raising and lowering the tool supporting member, and a take-up device for the iexible means.

3. A mounting for rock drills comprising a frame, a pair of columns slidable on the frame, a tubular tool supporting member, bearings on said member slidable on the columns, a cable passing through said tubular member to support said member, an adjustable take up device on the upper end of each column to secure each end of the cable to a column, guide means on the tool supporting member to guide longitudinal movement of the rock drill with respect to said member, and a drum for the cable on the tool supporting member to raise and lower the tool supporting member.

4. A mounting for rock drills comprising a frame, a pair of columns slidable on the frame, a tubular tool supporting member, bearings on said member slidable on the columns, a cable passing through said tubular member to support said member, an adjustable take up device on the upper end of each column to secure each end of the cable to a column, guide means on the tool supporting member to guide longitudinal movement of the rock drill with respect to said member, a drum for the cable on the tool supporting member to raise and lower the tool supporting member, and a second drum and cable to move the rock drill longitudinal with respect to said tubular tool supporting member.

5. A mounting for rock drills comprising a frame, columns on the frame and being slidable thereon, means to clamp the columns on the frame at any desired position, a tubular supporting member, bearings on the tool supporting member slidable on the columns, a cable passing through the supporting member to support said member, means to guide the cable in the tool supporting member, means at each end of the cable to secure an end thereof to each column, means to guide longitudinal movement of the tool with respect to the tool supporting member,

and means to enable the cable to raise and v lower the tool supporting member.

6. A mounting for rock drills comprising a frame, columns on the frame and. being slidable thereon, means to clamp the columns on the frame at any desiredfposition, a tubular supporting member, bearings on the tool supporting member slidable on the columns, a cablepassing through the supporting member to support same member, meansto guide the cable in the tool supporting member, means at each end of the cable to secure an end thereof to eachv column, means to guide longitudinal ymovement of the tool with respect to the tool supporting member, means to enable the cable to raise vand lower the tool supporting member, and means to move the tool withrespect to the tool supporting member.

DUDLEY W.v HART

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