US1294019A - Drilling-machine. - Google Patents

Description

J. ZINK.

DRILLING MACHINE.

APPLICATION man FEB. 6. 1918.

Patented Feb. 11, 1919.

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INVENTQR 2225:

vvsmessss N. W 02m ATTOR N EY.

JOHN ZINK, 0F TERRE HAUTE, INDIANA.

DRILLING-MACHINE.

' teeters.

To all whom it may concern:

Be it known that I, J OHN ZINK, a citizen of the United States, residing at Terre Haute, in the county" of Vigo and State of Indiana, have invented certain new and useful Improvements in Drilling-Machines, of which the following is a specification.

This invention relates to drilling machines, and more particularly to a machine which is especially. adapted for mining coal and similar purposes. I

One of the main objects of the invention is to provide a machine of the character stated of simple construction and operation which may be readily operated manually. A further object is to provide a drilling machine comprising a rigid supporting frame and a carriage or inner frame slida-ble therein which carries the drilling mechanism, simple and eflicient means being provided for securing this carriage in vertical adjustment. A further object is to provide a main bit having a center borer secured therein and of less diameter than the main bit, reamers being provided at the inner end of the main bit and serving to enlarge the hole made by the center borer, the main bit itself constituting a screw feed for removing the material from the hole being. bored. Further objects will appear from the detailed description.

In the drawings:

Figure 1 is a back view of a drilling machine constructedin accordance with my invention.

Fig. 2 is a side view.

Fig. 3 is a transverse section taken on a plane above the drive gearing, looking down, this section being taken substantially on line 33 of Fig. 2. Fig. 4 is a section taken substantially on line H of Fig. 2.

I Fig. 5 is a similar section taken on line 5 5 of Fig. 1. i

Fig. 6 is a detail end view of the main drilling bit.

The main supportin frame A is ofsubstantially rectangular shape having the end bars 1 and 2 and the side bars 3 and 4. A securing pin 5 is slidably mounted through bar 1 at the center thereof, and is secured in adjustment by means of the eye-bolt 6 which may be threaded into tight engagement therewith by a suitable instrument which is inserted through the eye of the bolt. A similar pin 7 is inserted through Specification of Letters Patent.

Application filed February 6, 1918.

Patented Feb. 11, 1919.

Serial No. 215,682.

the lower end bar 2 and is secured in adjustment therein by an eye bolt 8. These plns serve to secure the main supporting frame in position in the room in which the machine is being used, the upper pin 5 en gaging into the ceiling and the lower pin 7 engaging into the floor of the room in the well-known manner. A rectangular frame or carriage B' fits snugly inframe A and is slidablelongitudinally thereof. The upper end bar 9 of this carriage is provided with heavy guide straps 10 which fit snugly about the adjacent side bar of the main frame and serve to guide the carriage during its movement in the main frame. Similar guide straps 11 are provided at each end of the lower end bar 12 of the carriage and also engaged about the side bars of main frame A. Adjusting bolts 13 are threaded through the outer bars of straps 10 and cooperate with similar bolts 14L threaded through the outer bars of straps 11, to secure the carriage in vertical adjustment in the frame. By this means, the carriage and the drilling mechanism carried thereby may be readily secured in any desired vertical adjustment within the main frame.

A shaft 15 is rotatably mounted in bearing blocks 16 secured to the rear edges of the side bars of carriage B. This shaft is secured against aXial movement by means of a collar 17 secured thereon and engaging the inner face of one of the bearing blocks 16 and by the hub 18 of the gear wheel 19 keyed on the shaft, this hub engaging the inner face of the other bearing block. The shaft is squared at each end, as at 20, to receive the socket 21 of an operating crank 22 for manually rotating the shaft. Gear 19 meshes with a pinion 23 secured on a. shaft 24 Which is rotatably supported in bearing blocks 25 above shaft 15. Suitable collars 26 are secured on shaft 24 adjacent the outer faces of the bearing blocks and serve to prevent axial movement of this shaft. These collars are secured in position by means of set screws for a purpose to be later disclosed. Pinion 23 is provided, on its inner face, with an inwardly directed beveled gear 27. This gear meshes with a beveled gear 28 secured on a stub shaft 29 rotatably mounted in a cross-piece 30 carried by the inner frame or carriage B. This tub shaft is normally secured against axial movement by a collar 31 secured on the outer end thereof and cooperating with the hub of gear 28 in the the spur gear 35 may be rotated at relatively high speed by means of the crank 22, this operation of the gear wheel 35 being facili tated by the fly wheel 37. If desired, the set screws for securing the collars 26 on'shaft 24 may be loosened and the fly wheel 37 be removed from this shaft, the shaft being slid through the bearing blocks 25 and the fly wheel placed on the other end thereof, after which the crank 22 may be placed on the other end of shaft 15 to that illustrated. By this means, the machine may be quickly and easily adjusted so as to be operated from either side desired. V

Spur gear is centrally bored to receive a screw-feed rod 38 slidable through the gear. This rod is provided with a groove 39 which receives a rib or feather 40 formed on the inner surface of the hub of the gear, the feed rod bein slidably connected to the gear so as to rotate therewith and move axially in dependently of the gear. A seotionalfeed nut indicated generally by 40 is secured to the front face of the cross bar 36. This nut is disposed in axial alinement with the gear 35 and is composed of an upper fixed section and a lower hinged section which may be forced toward the fixed section by means of wedges forced beneath the pin carried by the lower section and an arm carried by the bar so as to close the nut, or in any other suitable manner. This nut is interiorly threaded, the thread of the nut corresponding with the thread of feed rod 38, so that when the gear 35 is rotated, rod -38 will be rotated and will besimultaneously fed through the nut 40. It will be understood, of course, that any other suitable form of nut than that illustrated may be employed. A main drill bit 41 issecured in the for ward end of rod 38. This main bit is provided in its forward end portion, with an axial bore which receives the socket portion of a center borer 42. A set screw 43 serves to secure this center borer detachably in the outer end of main bit 41. Bit 41 is further provided, adjacent its outer end, with reaming members 44 which are secured by means of set screws in suitable sockets in thebit. These reaming members are disposed at a forward angle to the bit and project radially thereof, the function of members 44 being to cut out or enlarge the entering hole or bore made by the center borer 42. The machine is set up adjacent the fall of the coal to be mined in the usual manner, after which the main bit 41, and consequently the center borer 42, are rotated by means of the crank 22. The center borer 42 acts to form the initial bore or opening and, during its rotation, is fed forwardly into the coal. The center borer is followed by the reamers 44 which act to cut out or enlarge the opening formed by borer 42. The reamers are followed by the main bit 41 which acts in the manner of a screw conveyer to remove the cut coal from the borer, thus insuring a clean and uniform. out and ease of operation of the machine. By providing the center borer 42 and the reamers 44 in conjunction with the main bit 41 which serves to remove the slack the bore may be formed by first cutting a comparatively small opening which is then enlarged to the size desired, thus greatly facilitating the operation and rendering it possible to bore a hole with the application of but comparatively small ower.

WVhat is claimed is In a drilling machine, a supporting frame provided with two spaced parallel side bars, a carriage slidably mounted for vertical movement on said side bars and fitting snugly between the same, means for securing the carriage in vertical adjustment, a drill shaft rotatably supported by the carriage at the transverse center thereof, a drive shaft rotatably supported by said carriage and mounteddirectly on the rear face thereof, a shaft rotatably mounted directly on the rearward face of the carriage in vere tical alinement with said drive shaft, driving connections between the two said shafts, and driving connections between said drill shaft and the shaft mounted above the drive shaft for rotating said drill shaft, all of said shafts being supported by'the carriage in superposed spaced relation so as to eliminate all tendency to tilt the carriage so as to cause binding thereof'on the supporting frame.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN ZINK.

\Vitnesses:

FRANKLIN YOUNG, TILLYE BABILms.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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