US1862926A

US1862926A - Rock drill

Info

Publication number: US1862926A
Application number: US396559A
Authority: US
Inventors: Elmer G Gartin
Original assignee: Sullivan Machinery Co
Current assignee: Sullivan Machinery Co
Priority date: 1929-10-01
Filing date: 1929-10-01
Publication date: 1932-06-14
Anticipated expiration: 1949-06-14

Description

E. G. GARTIN June; 14, 1932.

ROCK DRILL Filed Oct. 1, 1929 1720622607: 5227261 6? Gafit/n may A; 4-

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W N Q ANN Patented Ja 1'4, 1932 I '-'11 ,86 2,92li I NITED'STATES PATENT OFFICE G. GABTIN, OF CLARE'HONT, NEW HAMPSHIRE, ASSIGNOB '10 SULLIVAN MACHINERY COMPANY, A COBPORATION OF .MASSACH'USEI'IS:

ROCK DRILL Application filed October 1,. 1929. Serial No. 896,559.

This invention relates to rock drills, and Fig. 4 is a detail sectional view taken on more particularly to improved pressure fluid line H of Fig. 1. n I operated feeding mechanism for a rock drill Fig. 5 is a detail sectional view of the feed the mounted rifter type. controlling valve mechanism shown in Fig.

An object of this invention is to provide 1 with the valve shown in adiflerent position. 55 I an improved rock drill feeding mechanism. In this illustrative construction there is Another object is toprovide an improved shown a rock drill of the mounted drifter pressure fluid operated feeding mechanism ype inc uding a drilling tool 1 having a usual or a rock drill of the mounted drifter type. hammer motor 2 which is adaptedfio per nsm A further object is to provide an improved sw y Willate d1'111 Stee1 AS lsusllfil at rock drill feeding mechanis i l di g a IOCk'dllllS of the drifter type the cylinder pressure fluid operated feeding motor of the 0f the fl j M 1 2 18 pr v d d wi h latcylinder and piston type and improved cona y p i g gm m mb rs 01 glbs 4} nections between the feeding motor and the d y mounted- P ral l gnldeways ,5

15 drilling tool whereby a relatively long feed j fi 'lntegral wlijh gq Shgfl 65' is obtained withoutmaterially increasing the vg Shell 18 pr ld d with a usual sw vel over-all length of the drill. A further ob p h 7 l f to he h' p In a ject is to provide in such a drill an improved sultahle tmhhloh 11101111151111; of h tnPoh ressure fluid operated feeding motor of the 1111111 l known nn I11 the P 20 cylinder and piston type and improved rack f h 'h h y formed 1 and pinion mechanism between the feeding h gulde sheuhhd @Tovlded motor and the drilling tool whereby the rate W a hg hf bore 9 lllwhlch alfeed of feeding movement of the feed motor is P sh 10.13 B y h e substantially multiplied. A further object cyhhdehls provldefl W h haad 11 n is to provide a drifter type rock drill having teg'ml Wlth the elude Shell, h a detachhhle, 75

a relativelylong feed while an exceedingly rear head 1 l Secured q e g fi. compact structure is retained. Yet another h hh t a the feed Plstoh 13 object is to provide an improved pressure provldhd Wlth a tubular ffied P 13 fluidoperated. feeding mechanism foruse exthhdlhg through an opehlhg 14111 hh front m with a drifter type rock drill of a standard s a 11 i l' formed i construction. 7 These and other objects and f h depehdmg ears bosses 15 P advanta es of this invention will, however, P i transverse bolt 16 as clearly shown, hereina more fully appeat in Fig. &. J ournaled on the boltl6 1s a spur In the accomfianying drawing there is pinion 17mesh1ngw1ththeteethof astatlonas shown forpurposes of illustration one form My rack 18 formed mtegr wlth the gnde r shell and arranged in advance of the feed i fi z g fg l l assume m P cylinder. Telescopically arranged within 1 a1 f d the tubular piston rod 13 isaslidable rod 19 ;1S a 2 i w F having formed thereon rack teeth 20-also WP? rock h h mcqrpommd therhm meshing'with the teeth oi the spur pinion 9o 9 11116 s a v mi the p f f h 17. This rod 19 is secured by a nut and m h m mf h h helhg screw connection 21 to. a clamp member 22 shown par lal y n u m detalls rigidly clamped to the front end of the of con r m drilling tool by means of a transverse clamp-- F gis a transverse vertical sectional in bolt 23. This rodisheld againstrotation view taken s bs antially n n 2-.- of "re ative to the clamp member 22by means-of Fig. 1. r asquared portion24thereon fittingasqu Fig. 3 is a transverse vertical sectional ope 25inthe clamp.

view taken subdaantially on-line 3-3 The mproved fluid distribution manner??? f Fig. 1. feed cylinder COmPI'ISBS a throttle 109' port 31 with the cylinder bore at the front side of the feed piston, while the passage 29 communicates with the feed cylinder bore at the rear side of'the piston. Traversing the wall of the throttle valve is a port 32 communicating with a fluid supply chamber 33 formed centrally within the valve. Also formed on the exterior periphery of the valve are

circumferential grooves

34 and 35, while

exhaust ports

36 and 37 connect the bore 27 to atmosphere. When the feed control valve .26 is in the position shown in Fig. 5, a pressure fluid is admitted from the supply chamberi33 in the valve through the port 32 and passage 29 to the rear end of the cylinder bore at the rear side ,of the feed piston. At the same time the pressure fluid within the front end of the cylinder bore is connected to exhaust through port 31, passage 30, groove 35 on the valve, and exhaustport 37 The pressure fluid acting on the rear pressure area of the feed piston 10 causes the latter to move forward within the cylinder bore and carry with it the gear 17 which meshes with the stationary rack 18 and the rack 20 on the rod 19. This gear reacting on the stationary rack rotates in a. clockwise direction as viewed in Fig. 1 and as a result this gear, due to its meshing engagement with the rack 20,.causes the rod 19 to be moved forward at a speed substantiall twice that of the rate of movement of the fl ed piston. As a result the drilling tool 1 which is connected to the rod 19 by clamp member 22 is fed forward on the guideways on the guide shell, the rack and pinion construction between the feed piston and the drill causing the latter to be fed a distance substantially twice the distance of travel of the feed piston 10. When the, drilling tool is fed to its extreme limit of forward movement relative to the guide shell, the feed control valve 26 is turned into the position shown in Fig. 1,

thereby connecting the cylinder bore at the rear side of the piston to exhaust through passage 29, groove 34 in the valve, and exhaust port36, while the cylinder bore at the front side of the feed piston is connected to e source of pressure fluid supply through port 31, passage 30 and port 32 communicatwith the pressure chamber 33 in the v ve As a result the pressure fluid acting on the front pressure area of the feed piston causes the latter to move rearward, thereby feeding the drilling to'ol rearward in the guides on the guide shell to the position shown in Fig. 1. j

,As aresult of this invention an improved pressure fluid operated feeding mechanism is provided for a rock drill of the mounted drlfter type wherein a relatively long feed is obtained without materially increasing the over-all length of the drill. It will further be noted that by the telescopic arrangement of the tubular feed piston rod and the sliding rack an extremely compact feeding mechanism is obtained. It will further be noted that an improved pressure fluid operated feeding mechanism is provided for a drifter type rock drill which is adapted to use with a rock' drill of a standard design. These and otheruses and advantages of this invention other forms without departing fromits spinit or the scope of the appended claims.

What I claim as new and desire to secure by Letters Patent is:

1. In a rock drill, a guide shell, a drilling tool guided thereon, pressure fluid operated mechanism for feeding said tool relative to said shell including relatively reciprocable cylinder and piston elements one of which has a chamber therein, connections between one of said feeding elements and the drilling tool including a rack secured to said shell, a pinion carried by and movable with one'of said feeding elements and meshing with said rack, a second rack with which said pinion meshes and. arranged to extend within said chamber in said feeding element, and a connection between one end of said last mentioned rack and the drilling tool.

2. In a rock drill, a guide shell, a drilling tool guided thereon, pressure fluid operated mechanism forfeeding said tool relative to said shell including relatively reciprocable cylinder and piston elements one of which has a chamber therein, connections between one of said fee'ding elements and the drilling tool including a stationary rack secured to the guide shell, a pinion carried by and movable with. one of said feeding elements and meshing with said rack, a sliding rack with which said pinion meshes and arranged to extend within said chamber, and a connection between the forward end of said sliding rack and the front end of the drilling tool.

3. In a rock drill, a. guide shell, a drilling tool guided thereon, pressure fluid operated said shel feeding elements,

"elements and meshing with said racks.

5. In a rock drill, a guide shell, a drilling tool guidedthereon, pressure fluid operated mechanism for feeding said tool relative to said shell including a stationary feed cylinder and a feed piston reciprocably mounted thereon, said feed piston having a tubular piston Y rod, and connections between said Y feed piston and the tool including a sliding rack telescopically arranged within said piston rod, a stationary rack secured to the guide vshell, and a pinion carried by and movable with said piston and meshing with said racks. d. In a rock drill, a guide shell, a drillin tool guided thereon, pressure fluid operate mechanism for feeding said tool relative to said shell including relatively reciprocable feeding elements, and connections between one of said elements and the drilling tool including cooperating toothed elements one of which iscoaXially arranged with and telescopically arranged wit feeding elements during the feeding operation, and connections between one of said toothed elements and the drillingtool.

7. In a rock drill, a guide shell, a drilling tool guided thereon, pressure which is telescopically arranged within oneof said feeding elements, andconnections be- "tween one of said toothed elements and the drilling tool. v V 8. In a rock a guide shell, a drilling pressure fluid operated mechanism vfor feeding the tool relative to I said shell including relatively reciprocable tween one of. said cylinder and piston elements, connections be- I lements and said tool including a rack arranged to extend within one of said elements, a stationary rack carried by the guide shell in'advance of said and. a pinion carried by 5 meshing h aish cke-sedg guide shell, a drilling one of said feeding elements and movable relative to said elements and the tool insaid shell including 9. In a rock drill, a guide shell, adrilling tool guided mechanlsm for feeding said tool relative to said shell including relatively reciprocable cylinder and pist tions between one of said feeding elements 11 elements, and connecand' said tool including a sliding rac'k telescopically arranged with one of said feeding elements, astationary rack secured to said g ab e with said reciprocable feeding element and meshing withsaid rac 10. In a rock drill, a guide shell, a drilling tool guided thereon, pressure fluid operated'mechanism for feeding thetool rela tive to feed piston reciprocably mounted therein and having a hollow piston rod, and connections betweensaid feed piston and the tool including,a sliding rack telescopically arranged within said hollow piston rod and guided by the latter, said rack being slidable relative to said piston and cylinder, a stationary rack secured to said guide shell, and a pinion carried by and movable with said tubular piston rod and meshing with said racks.

11.. In a rock drill, a guide shell, a drilling tool guided thereon, pressure fluid operated mechanism for feeding said tool relative to said shell including relatively reciprocable feeding elements one of which has a tubular portion, andconnections feeding elements and said tool including co operating relatively movable toothed elements one of which is telescopically arranged within said tubular portion, and connections between one of said toothed elements and the drilling tool.

12. In a rock drill, a guide shell, a drilling tool guided thereon, pressure fluid operated mechanism for feeding said tool relative to said shell including relatively reciprocable feeding elements one of which has a tubular portion, and connections between one of said feeding elements and the tool including a sliding elementtelescopically arranged within said tubular portion, a cooperating stationary element carried by the'guide shell, and a rotatable element carried by and movable with one of said feeding elements and cooperating with sliding and stationary elements. Y e

"13. In a rock drill, a guide shell, a

mechanism for feeding said tool relative to latively reciprocable cylinder and one of said.

thereon, pressure fluid operated iston elements, and connections. 1 between one of said elements and the uli de shell, and a pinion carried by and movj said shell including a feed cylinder, a

between one of said member, amember cartionary element and rotatable through its coperation with said element on movement of said last mentioned feeding element and a, member secured to the drillingtool and inter- 5 enga 'ng with said rotatable member, said mem r secured to the drilling tool bein telescopically arranged within one of said feedin elements.

14. n a rock drill, a guide shell, a drillingtool guided thereon, pressure fluid operated mechanism for feeding saidv tool relative to said shell including relatively reciprocabl'e cylinder and piston elements, and connections between said piston element and the drilling tool including a hollow piston rod, a

member secured to said drilling tool and telescopically arranged with respect to said piston rod, :1 member carriedby said piston rod outside said cylinder and interengaging.

with said telescopically arranged member and operative .on rotation to effect longitudinal movement ofthe latter and of the drilling tool, and means for efi'ecting rotation of said rotatable member including a stationary member extending longitudinally of said shell relative to which said rotatable member has movement on reciprocation of said feed piston. y

15. In a rock drill, a guide shell-,a drilling tool guided, thereon, pressure fluid operated mechanism for feeding said tool relative to said shell including relatively reciprocable feeding elements, and connections between one of said elements and the drilling tool including cooperating toothed elements one of which has a longitudinal toothed portion 00- axial with and telescopically arranged within one of said feedin elements, and c0nnections between one 0? said toothed elements 40 and the drilling tool.

In testimony whereof I aflix my signature;

ELMER G. GARTIN.