US1954957A - Drill mounting - Google Patents

Description

A ril 17, 1934.

gm llnvllllmlll ll llllll ,W. A. SMITH, SR

DRILL MOUNTING Filed Dec. 8, 1932 JNVENTOR. I Yzl ct/22551211612 50.

H15 ATTORNEY.

Patented Apr, 17, 1934 earn or ies lngersoll-iRand Company, Ecrsey City, FL I, a

corporation of New Jersey Application December d,

1332, Serial No. (546,233

4 Claims. (Cl, 255-53) This invention relates to rock drilling mechanisms, and more particularly to a drill mountin adapted to be interposed between the roof and floor of a mine drift for supporting a percussive tool.

One object of the invention is to enable the mounting to be quickly set in a desired position.

Another object is to enable the mounting to be expeditiously moved from one drilling site to another.

Another object is to retain the mounting fixedly between the surfaces whereby it is supported irrespective of the nature of the soil upon which it rests.

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

In the drawing accompanying this specification and in which similar reference characters refer to similar parts,

Figure l is an elevation insection of a mcunting constructed in accordance with the practice of the invention and having a fluid actuated drilling mechanism mounted thereon, the latter being shown partly broken away, and

Figure 2 is a plan view of the mounting taken through Figure 1 on the line 2-2 looking in the direction indicated by the arrows.

Referring more particularly to the drawing, A designates a rock drill and B the mounting whereby the rock drill A is supported. The rock drill A may, as illustrated, consist of a drilling motor 0 adapted to actuate a working imple inent D into the material E. The drilling motor is fed to the work by a feeding mechanism F comprising a feeding cylinder G and a feeding piston l-l therein having a rod J which is connected to the rear end of the drilling motor C.

The feeding piston H is of the differential type having opposed actuating surfaces of which the larger surface, designated K, is located on the rear end of the piston HI and may, during the normal operation of the drilling mechanism, be constantly exposed to pressure fluid supplied thereto by a passage L in a head 0 which forms a closure for the rear end of the feeding cylinder Gr. The head 0, moreover, serves as a housing for a throttle valve P whereby communication between the passage L and a supply passage Q in the head 0 may be controlled.

The piston H is shown as having a passage R; which may also extend through the rod J for supplying pressure fluid to the drilling motor C. The front pressure area S of the piston H is also constantly exposed to pressure fluid which is admitted into the cylinder G, forwardly of the the rod X is threaded a rock engaging pointer piston H, through a passage T in the cylinder G.

The mounting B, constructed in accordance with the practice of the invention, is of the ver tical type and comprises in the present instance a cylinder U having a piston chamber V for the accommodation of a piston W. The piston W carries a rod X which extends slidably through a guide bushing Y threaded into the outer end of the cylinder U. Into the outer or free'end of Z to engage the roof of a drift wherein the drilling mechanism is arranged.

On the exterior surface of the cylinder U is a saddle member b which may be clamped to the feeding cylinder G and to the cylinder U, in a well known manner, at any point along the length of the cylinder U.

A closure is provided for the lower end of the cylinder U by a head 0 into which the cylinder U extends and towhich it may be secured, as by raising or otherwise. The head 0 is preferably of considerably larger diameter than the cylinder U and is recessed to provide a supply reservoir or chamber d which, in this instance, encircles the cylinder U and communicates with the piston chamber V through a port e in the cylinder U.

Within the head 0 is a supply passage f and into the outer end of the passage is threaded a connection 9 which may lead from a source of pressure fluid supply. Communication between the supply passage f and the connection 9 is controlled by a throttle valve h in the head 0 and the said throttle valve may also control communication between the passage f and an exhaust port 7' in the head 0.

To the end that pressure fluid may be conveniently supplied to the feeding cylinder G, for actuating the piston H and the elements connect-= ed thereto, the head 0 is provided with a pair of outlet ports 76 and o to which are connected flexible conduits p and (1, respectively. The conduit p is connected, at its opposite end, to the passage T and the conduit q leads to the passage Q to supply pressure fluid to the ends of the feeding cylinder G.

In order to provide the mounting with suitable supporting devices a plurality of radially extending rods 1*, three being shown herein, are arranged fixedly in the head 0 and preferably disposed equi-angularly with respect to each other. The outer ends of the rods r carry plates 3 having hub portions t which are recessed to receive the outer ends of rods 1* which may be pressed fitted to the hub portions t or otherwise fixedly secured thereto. As a preferred form of construction the u thereof are preferably of convex or similar shape of which the outer portions incline toward the edges of the plates. The plates s are, moreover, of substantial diameter in order that they may present a wide surface or areaof contact to the material upon which the mounting rests.

In practice, and with the drilling mechanism and the mounting arranged in substantially the correct position with respect to the floor and roof of a drift, the valve h is positioned to communicate the supply connection 9 with the supply chamber d. The pressure fluid thus admitted into the supply chamber flows'through the port 2 into the piston chamber U and, by acting against the piston W, presses the pointer Z firmly against the roof of the drift. The pressure passage 1 with the exhaust port 7'.

thus acting against the piston and the head 0 forces the plates s firmly against the floor upon which they seat and will maintain the entire mounting immovable and unaffected by the vibrations incident to the operation of the drilling motor 0.

Whenever it is desired to shift the drilling mechanism the valve It may be rotated to blank off the connection a and to communicate the Pressure fluid will then be exhausted from the piston chamber V and the piston W will descend and move the pointer Z out' of contact from the roof. The

mounting, together with the: drilling mechanism,

may then be skidded along the floor of the drift conveniently supported upon soft or broken material without requiring frequent resetting of the mounting to maintain it in the correct position. Being of large area, the plates s will prevent the mounting from sinking into the material, and the position of the mounting will, therefore, remain undisturbed throughout the entire drilling operation.

the tool, a piston in the cylinder having a rod,

arock engaging pointer at the end of the rod, means for supplying pressure fluid to the cylinder to actuate the piston, and a plurality of dishshaped base members secured rigidly to the cylinder and being off-set with respect thereto to support the mounting.

3. A mounting for supporting a fluid actuated percussive tool, comprising a cylinder to support the tool, a piston in the cylinder carrying a rock engaging pointer, a head for the cylinder, means in the head for supplying pressure fluid to the cylinder for actuating the piston, a plurality of rods secured fixedly to the head and extending radially thereof, and dish-shaped base members secured fixedly to the outer ends of the rods to support the mounting.

4. A mounting for supporting a fluid actuated percussive tool, comprising a cylinder to support the tool, a piston in the cylinder carrying a rock engaging pointer, a head for the cylinder and having a pressure fluid supply chamber communicating with the cylinder, said head having an outlet opening for supplying pressure fluid from the chamber to a tool supported by the mounting, a throttle valve in the head for controlling the admission of pressure fluid into the cylinder, a plurality of radially extending arms secured fixedly to the cylinder, and dish-shaped base members secured rigidly to the arms for supporting the mounting.

WILLIAM A. SMITH, SR.

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