US2379137A

US2379137A - Rock drill support

Info

Publication number: US2379137A
Application number: US482964A
Authority: US
Inventors: Feucht Albert
Original assignee: Cleveland Pneumatic Tool Co
Current assignee: Cleveland Pneumatic Tool Co
Priority date: 1943-04-14
Filing date: 1943-04-14
Publication date: 1945-06-26
Anticipated expiration: 1962-06-26

Description

June 26, 1945. FEUCHT ROCK- DRILL SUPPORTS Filed April 14, 1943 2 Sheets-Sheet 1 INVEN.T0 ALBE T FEUCHT BY v ATTORNEY June 26, 1945. FEUCHT 2,379,137

ROCK DRILL SUPPORTS Filed April 14, 1943 2 Sheets-Sheet 2 F I- i, m 39 I I I U g INVENTOR Patented June 26, 1945 ROCK DRILL SUPPORT Albert Feucht, Garfield Heights, Ohio, assignor, by mesne assignments, to The Cleveland Pneumatic Tool Company, Cleveland, Ohio, a corporation of Ohio Application: April 14, 1943, Serial N0. 482,964

' 4 Claims (Cl. 255-51) The present invention relates broadly to rock drilling equipment but more particularly to a drilling apparatus including a rock drill of the drifter type having an adjustable mounting for supporting and moving the drill.

In work necessitating the use of such equipment,.namely, tunneling operations requiring the removal of rock or ore, holes must be drilled for the blasting charges in the face of the workings to drive the tunnel or drift. The form of the tunnel face produced by such a blast will be governed primarily by the depth to which the holes are drilled. Flat perpendicular tunnel faces are particularly desirable, but to obtain the same it is necessary to have the blind ends of the holes lie in the same vertical plane extending laterally of the tunnel, so. that-the rock or ore body will break cleanly in approximately this same plane when the charges are fired.

Means for rapidly raising and lowering the rock.

drill in the process of drilling holes for a blasting round are well known in the art. Heretofore the supporting means controlling the position of the drillhas been of the nature of an arm or boomlike. member which pivots about a fixed. point located on the base or frame of the supporting structure. A drill so held moves in a vertical arc, which sometimes necessitates shifting the position of the base or frame to compensate. for variations in the distance between the drill and the work face.

The primary object of the invention is to provide improved means for mounting the drill whereby the mounting can be maintained in a, constant vertical plane parallel to the, face of. the work when moving from one drilling position to another.

A further object of the invention is 130 p o:- vide an improved mounting for rock drills adapted to be associated with a mine car or other support in such, a manner that the boom or supporting member for the drill is capable ofmovement through a multiplicity of angles when changing the working position of the drill while maintaining the drill mounting in a singlevertical plane substantially parallel to the face of. the. work.

Other objects and advantages more or less ancillary to the foregoing reside in the specific-con: struction and aggroupment of the elements peculiar to this structure, as will become apparent. from a more complete examination of this specification.

In the drawings:

Fig. 1 is a top plan view of the improveddrill;

mounting means shown associated with. a mine car. i

Fig. 2 is a side elevational view thereof.

Fig. 3 is a top plan view of amodified form of the invention. i a

Fig. 4 is a side elevational view thereof.

Fig. 5-is a cross-sectional view taken substantially on line 55 of Fig. 3.

Fig. 6 is av detail elevational view of the rear end of the rock drill supporting boom .asseen on line 66 of Fig. 4'.

Referring to the drawings for a more detailed. description and particularly Figs. 1 and-2 thereof, a mine car of conventional construction is generally designated by the reference numeral 8 the same being movable withinv a mine Blon: the tracks 9. It is to be understood that. for purposes of illustration only, the supporting means for the drill isshown associated with a mine car, and that with slight modification, said means for supporting the rock drill and forming thepresent invention, is capable of use with any portable or stationary member.

Extending vertically from the front end. of: the car 8 and suitably attached to. the floor Ml thereof, is a pair of members I I and H. A simi-v ilar pair of upright members l3 and I4 issuitably. connected to the floor of the car adjacent the rear end thereof. The uprights ll, l2, l3 and: I4, together with means for rigidly supporting them such as the floor I0 of the car, constitutea frame. The members l3 and I4. aresubstantially shorter than the members H. and I2: and support the means for effecting movement. ofz the drilling apparatus generally designated: by: the reference numeral I5 and suitably supported on the upper end of the boom I 6. While the boom I6 is illustrated asof tubular construction, it may be desired, in actual practice, to form. the same substantially square in cross-section. in which case the side walls-of the boom. would have frictional contact with the inner surfaces of the members H and I2.

The rear end of the boom I6 is substantially T-shaped as indicated at H, the lateral extenisions thereof having frictional contactwith the:

Each member I3 and. I4 is formedwith amean like extension. 20. between which. is. journaled. a.

the crank 26 to effect rotation of the gear wheel which will in turn rotate the drum 24 for a purpose to be hereinafter more fully described.

The intermediate portion of the boom l6, or that portion of the boom which is disposed between the upright members II and I2 is pressed out as indicated at 21' for guiding contact with the inner faces of the members II and I2. The portion 21 carries a threaded stud 21 which extends completely through the two upright members and is movable in an arcuate slot 28 formed in each of said members. The arcuate slot 28 is best shown in Fig. 2 of the drawings and it is to be understoodthat a similar slot is also formed in the upright member..|2 which is 10- cated in substantial parallelism with theslot 28. A pulley 29 is supported on a threadedshaft 3|] between the members I I and I2 adjacent their upper ends and is held between said members by means of a nut or the like 3|.

A cable 32 has one endfixedly secured to the boom I6 as indicated at 33 and its other end is trained over and under the pulley 2| for attachment to the drum 24. v I

As before indicated the rock drill conventional construction and includes a drill steel 34 and feeding mechanism 35." As is well known in the art, the drill steel 34 is moved into engagement with the work through the feeding mechanism 35 and is operated by compressed air to create a series of reciprocating impulses thereto. The front end of the boom l6 carries an arm 36 the same being attached to said boom by the clamping means 31. The arm 36 is connected to the feeding mechanism 35 by any, desired means for supporting said feeding mechanism and rock drill for movement with the boom I6. For the purposes of this case, the arm 36 may be considered to be the drill mounting.

In the operation of the device, when desiring to move the rock drill I5 from the position illustrated in Fig. 2 of the drawings, the drill steel 34 is first withdrawn from the wall- 38 of the mine. To lower the drill, counterclockwise rotation is imparted to the drum 24 through the crank arm 26 which will unwind the cable 32 from the drum causing the intermediate portion of the boom I6 or more particularly its supporting stud 21 to move downwardly within the slots 28 of the members I I and I2. At the same time, the end ll of the boom I6 is traveling rearwardly within the slots I8 until the supporting stud 21 passes through the mid-position of the arcuate slots 28, and then travels forwardly within the slots I8 as the cable 32 is being unwound from the drum. By referring to Fig. 2 of the drawings, it will be noted from-the dotted line illustration that the boom I6 has been moved into various positions without affecting the fore and aft posi-- tion of the arm 36 and the clamp-31 thus .maintaining the rock drill I5 and its .drill'steel 34 at substantially-the same distance from: the face of the wall 38. Thus when desiring to drill a hole, afterchanging the positionofthe. drill l5,

very little movement of the feeding mechanism.

I5 is ofisrequired in order to bring the drill steel 34 into contact with the wall of the mine. When moving the boom I6 and its supported drill I5 upwardly, the crank arm 26 is rotated in a clockwise direction which will wind the cable on the drum 24 and cause the rear end of the boom to move forwardly within the slots I8 and the intermediate stud 21 to move upwardly through the arcuate slots 28 until the drill I5 is brought into the desired drilling position. The pulleys 2| and '29 serve as a guide for the cable, preventing tangling of the same in its travel to and from the drum 24. The cable 32 having one end attached at 33 to the boom will cause said boom to be raised and lowered upon rotation of the drum 24 in a clockwise or counterclockwise direction, respectively.

In the form of the invention illustrated in Figs. 3 to 6 inclusive, there is also illustrated a. mine car 39 having front and rear pairs of upright members 40 and 4|, respectively, which uprights, together with the car floor, constitute a supporting frame. The rock drill 42 is supported upon an arm 42' at the upper end of the boom 43 in the same manner as in the preferred form. The boom 43 is movable in the said frame for raising and lowering the arm 42 or the'drill mounting while maintaining it in a given vertical plane transverse to the supporting frame.

The rear pair of upright members 4| supports the mechanism for moving the boom 43 to various angular positions, some of which are illustratedin dotted lines in Fig. 4 of the drawings. Mounted on the outer face of one of the members 4|, there is a gear wheel 45 rotatable on a stub shaft 46. The gear wheel 45 is encased within a stepped housing 41 which is bolted or otherwise secured to one of the members 4| as indicated at 48. Extending laterally from the housing 41 is an arm 49, the inner end of said arm carrying a worm gear in mesh with the gear wheel 45. The outer end of the arm 49 carries a crank 5| adapted to be manually operated for rotating the worm gear 50 and gear wheel 45. The other member 4| has a relatively short stub shaft 52 projecting inwardly therefrom and mounted within a bearing 53. The shafts46 and 52 have attached thereto or integral therewith

parallel arms

54 and 55, respectively, which are rotatable with their respective shafts upon operation of the crank 5|.

Supported between the free ends of'the

arms

54 and 55 is the lower end 56 of the boom 43, said lower end being connected to the arms for rotation therewith when changing the drilling location of the rock drill. The end 56 carries a bearing plate 51 which is bolted or otherwise secured to a second bearing plate 58. A hollow sleeve 59 is supported between the plates 56 and 51 through which extends a bolt 60 passing through aligned apertures in the free ends of the

arms

54 and 55 whereby the unit including the heavy plates, sleeve and lower end of the boom is attached between the arms'54 and 55. A nut 6| retains the unit in fixed position. As shown in Fig. 6 of the drawings, the sleeve 59 equals the width of the space between the arms 54and 55 preventing end play of the unit as'rotation is imparted thereto. As is .to be understood, this pivotal connectionv of the lower end .56, of the boom 43 will cause said end and arms to swing through the are indicated in dotted lines in Fig. 4 and designated by the reference numeral: 62 as rotation is imparted to the. arms through the gears 45 and. 50.

The intermediate portion of the boom 43 is slidably held between the pair of upright members 40. An elongated slot 63 is formed in the boom 43 and extends entirely therethrough. A bolt or other fastening means 64 extends through the pair of members 40 and the slot 63 in a manner to permit the boom 43 to slide relative to the upright members 40 as the

arms

54 and 55 are rotated in the manner previously described.

The operation of this form of the invention is thought to be readily obvious from an inspection of Fig. 4 of the drawings. When desiring to change the location of the drill 42 and drill steel 44 for a new drilling position, the crank will be rotated in a clockwise direction to lower the drill which will cause the

arms

54 and 55 to rotate following the path of the are 62. This rotation of the arms will permit the boom 43 to slide the length of the elongated slot 63 while maintaining the outer end of the boom and the arm 42 in a single vertical plane transverse to the supporting frame. The dotted line illustration 65 shows the boom 43 in a substantially horizontal position but it will be observed that the clamping end of said boom is directly beneath its position in the full line illustration. The dotted. line illustration 66 shows the boom 43 having moved approximately 90 degrees from the full line position, while maintaining the outer or clamping end thereof in the same vertical plane. When desiring to raise the drill 42 and its drillsteel 44, the crank 5| will be rotated in a counter-clockwise direction which will reverse the travel of the

arms

54 and 55 through the arc 62 causing sliding movement of the boom 43 within the limits of the slot 63.

While the arm 54 alone is directly connected to the rotating gears 45 and 53, the rigid connection of the lower end of the boom 43 to the arm 55 is sufiicient to rotate the arm 55 in unison with said arm 54. As. is to be understood, the

arms

54 and 55 are in parallel relation at all times, either during movement or when stationary.

In each form of the invention, means have been provided for raising and lowering the boom and at the same time moving it longitudinally, so that the end ofthe boom which supports the drill moves vertically or parallel to the face of the wall being drilled. After repositioning the drill, very little forward movement of the drill steel is thus required in order to again bring the same into drilling contact with the Wall of the mine.

Although the foregoing description is necessarily of a detailed character, in order to completely set forth the invention, it is to be understood that the specific terminology is not intended to be restrictive or confining and it is to be further understood that various rearrangements of parts and modifications of structural detail may be resorted to without departing from the scope or spirit of the invention as herein claimed.

I claim:

1. In drilling mechanism, front and rear supports rigid with respect to each other, a boom carried by said supports and extending beyond the front support, a drill mounting at the forward end of said boom, said boom being arranged to swing through a vertical are for adjusting the height of said drill mounting, cooperating means between the boom and one of said supports for moving the boom longitudinally as it swings in order to maintain a straight vertical path of movement for said mounting, and a horizontally slidable interconnection betweenthe boom and the other of said supports, said interconnection remaining at a fixed level.

2. In drilling mechanism, front and rear supports rigid with respect to each other, a boom carried by said supports and extending beyond the front support, a drill mounting at the forward end of said boom, a pin and slot connection between the boom and said rear support, the pin of said connection remaining at a fixed level in its support and constituting a pivot about which the boom swings through a vertical are for adjusting the height of said drill mounting, and cooperating means between the boom and said front support for moving the boom longitudinally as it swings in order to maintain a straight vertical path of movement for said drill front support for moving said boom longitudinally.

as it swings in order to maintain a straight vertical path of movement for said drill mounting, and flexible means attached to said boom and operated from said rear support for swinging the boom up or down about the pin of said pin and slot connection. 4

4. In drilling mechanism, front and rear supports rigid with respect to each other, a boom carried by said supports and extending beyond the front support, a drill mounting at the forward end of said boom, a pin and slot connection between the boom and said front support, the pin of said connection remaining at a fixed level and constituting a pivot about which theboom swings through avertical arc for adjusting the height of said drill mounting, and a crank on said rear support comprising an arm pivotally connected with the said boom, the parts being so dimensioned and arranged and the movement of the crank being through an angle such that said drill mounting is maintained in a straight vertical path as the boom swings up or down.

ALBERT FEUCHT.