US2210628A - Power drill - Google Patents

Description

Aug. 6, 1940. E. MANTINI 2,210,628

' POWER DRILL Filed June 1.3, 1939 INVENTOR Eugenio J7 laniznz,

/ ATTORNEYS WITNESSES Patented Aug. 6, 1940 UNITED STATES 1 Claim.

This invention relates to an improved power drill and has for an object to provide a construction of power drill which is particularly adapted for mining, the parts being so arranged that they may be adjusted to take care of different conditions met with during mining operations.

Another object of the invention is to provide a power drill wherein the drill and driving means are adjustably mounted.

' Another object of the invention is to provide a power drill having an adjustable mounting capable of engaging the bottom and ceiling of a mine or capable of being held in place by auxiliary means where the ceiling is of unusual height.

In the accompanying drawing- Fig. 1 is a vertical sectional view through part of a mine and an embodiment of the invention;

Fig. 2 is an enlarged sectional view through Fig. 1 approximately on the line 22;

Fig. 3 is a fragmentary view showing an auxiliary support for the main supporting standard illustrated in Fig. 1.

Referring to the accompanying drawing by numerals, l indicates a wall of coal or other material which is adapted to be mined. In mining or removing the wall I, it is customary to drill one or more holes therein and then to place an explosive in the holes to break down sections of the wall. In the present invention a power drill has been provided for drilling holes in the wall I.

As shown in Fig. 1, a drill 2 has been driven a short distance into the wall I by the mechanism embodying the invention. It will be understood that the drill 2 is a conventional drill and may be of any desired kind. The drill 2 is connected with a rotating threaded shaft 3 by a coupling 6 which is preferably permanently connected with shaft 3 and removably coupled to the end of drill 2. The end 5 of shaft 3 may be removably coupled to the coupling member 6 connected with a reducing gear structure l of any desired kind.

The reducing gear structure is actuated by an electric motor 8 designed to receive current from any suitable supply. When motor 3 is operating, shaft 3 will be rotated and in turn will rotate drill 2. In order to feed the shaft 3 forwardly, a nut e is provided. This nut is formed in two parts, as shown in Fig. 2, namely, parts l0 and l l. The part H! is provided with a threaded sec-- tion l2 and with journal members I2 and Id journaled in a U-shaped bracket l4 supported by a short stem 16 welded or otherwise rigidly secured to a cross bar I! forming part of a frame 18. The frame 18 is preferably U-shaped and is (El. 255--2iil formed of angle irons l9 except for the respective cross bars ll, which cross bars are preferably welded in place. llhe part I l of hat 9 is pivotally mounted at 2i! and is provided with a threaded section 2! coacting with the threaded section i2 for receiving the shaft 3. A slot 22 is formed in part Ii and through this slot a post 23 rigidly secured to part Iii extends. A pin 24 is removably mounted in the free end of the post 23 and normally acts to hold part II in functioning position as shown in Fig. 2.

As the motor 8 continues to rotate shaft 3, said shaft will not only rotate drill 2 but will move the same to the left, as shown in Fig. 1, until the coupling 6 contacts with the nut 9, whereupon current is turned off manually so as to prevent injury to the device. If a deeper bore is necessary the drill 2 is removed and a longer drill substituted and during this time part I l is swung to an open position and shaft 3 and motor 8 manually moved back to substantially the position shown in Fig. 1. A second operation of the shaft 3 will cause the new drill to function.

In order to hold the frame iii in place and, consequently, cause the other parts to function properly there are provided a rectangular standard 25 near nut 9 and preferably a single post 26 at the opposite end of the frame l8. Post 26 is provided with an enlarged foot 2'! and with a number of apertures 28 through which a pin 29 is adapted to be moved at different times. A

tubular sleeve 30 is welded or otherwise rigidly secured to an angle bar l9 at the end of frame 18 and post 26 slidingly extends through this tubular member. This tubular sleeve 30 is provided with apertures for accommodating the pin 29 so that this end of the frame l8 may be raised or lowered to secure any desired angle of the drill 2. Atthe front the frame [8 is provided with rows of apertures 31 for accommodating a pin 32 whereby the front of the frame may be raised or lowered as desired. It will be noted that each vertical leg of frame 25 is provided with a row of apertures 3| and the pin or bolt 32 extends through both legs. as illustrated in Fig. 2. A single post 33 is connected to the bottom of the standard 25, said post having an enlarged foot 3d adapted to rest on the floor 35. At the top of the standard 25, there is provided a threaded member 36 for receiving the internally threaded tube 37 having a pointed pin 38 extending from the upper end.

When the various parts are adjusted to substantially the desired position, a wrench is applied to the tubular member 31 and this member is rotated until the pin or threaded extension 38 tightly presses against the top 39. This firmly anchors the top in place so that as motor 8 functions the drill may readily be forced into the wall I. Concerning motor 8, it will be seen from Fig. 1 that the same is provided with rollers 40 resting on the side angle bars l9, whereby friction is reduced to a minimum. Occasionally the top or roof 39 is at too great a distance from the bottom 35 for the standard 25 to function properly and when this is the case an auxiliary top is provided by using a metal bar 4| which is driven into wall i and which is provided with an aperture 42 for receiving the reduced end 38 of the member 31. In this way the device may be anchored near wall I regardless of the height of the top 39.

In driving the threaded shaft 3 any suitable power may be used, as for instance an electric motor 8 as illustrated in Fig. 1. Where compressed air is available a compressed air engine may be used to rotate shaft 3, or, if preferred, a flexible shaft may be used, said shaft being driven by any suitable power from a distant point.

I claim:

A power drill including a rectangular frame having a pair of parallel side bars L-shaped in cross section, an adjustable standard at one end of said frame for adjustably supporting said end, a second adjustable standard at the opposite end of said frame, said second standard being formed with a pair of spaced parallel uprights, a connecting bar at each end of said uprights, said parallel uprights each being provided with a row of apertures, a pin adapted to be placed in any of said apertures in said uprights, said pin extending through said side bars for supporting said frame, a supporting foot connected to one of the connecting bars, a threaded member extending from the other of said connecting bars, a tubular member screwed on to said threaded member, said tubular member having a pointed anchoring projection, a nut carried by said frame near said pin, a screw extending through said nut, means at one end of said screw for connecting a drill to said screw, and a prime mover connected to the other end of said screw for rotating the same, said prime mover being provided with traction members resting on one leg of each of said L-shaped bars, said frame and said screw being swingable upwardly and downwardly in said second standard for providing a desired angle for said screw and the drill carried thereby.

EUGEN'IO MANTINI.

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