US1848376A - Drilling mechanism - Google Patents

Description

March 8, 1932. R. E. MURPHY DRILLING MECHANISM Original Filed May 3. 1928 uMR I...

h@ www www@ ms@ y 'gul' Munn-n1 1 motion `or sliding connectionshovvingfthe' f Patented Mar. 8, 1932 1 i, :nerr-eff srAr-as Brennan EMURPHY, on PITTSBSURGH, PnNNsYLWiNAyA'ssIGNoR mofsntrzivenf eHNERY Germany, nfeonrommron orifrfessecnusnmrsf A Darum@ Meenemen Application mee may; 3,1928; serial No. e74,e21. Renewed Malen eo,y 1931.

This invention relates toldii'lling'mechan y forward Vend Loi the shaft" 2 i'sjournaled in avnisms and more particularly, but noteXclu sively, pertains to a rotary coal drilling mechanismespecially adapted to use `vin drilling portion 5 projecting Withinandrioidly linedvr shotorblastholes'in the coal lace;

An object oiithis inventionis toprov'ide an improved drilling mechanism and more Vpar-y ticularly to provide." an' improved feeding'A means forvsuch a mechanism. lAnother object J is to provide improved feeding means for a drilling tool. having embodiedtherein mechanism for 'permitting the initial positioning oi the tool toaeilitat the starting of a hole. e Yet: another Objectis to'provide an improved :tool feeding mechanism of the differentialr4 screw type having embodied therein'aslin motion or sliding connecti'on whereby the? drillingy tool maybemanual-*lyl slid 'forwardly' inposition at the' coal face independentlyY ofV "the feedl screwmechanismtofacilitate v positioning of the toolduring starting of allele;r

These andvother obj eets offtliis invention will however subsequently more fully appear as the description proceeds;-

ln the accompanying*dravvingsvthere is shown for purposes of' illustrationy one form which the invention'may assume iny pract1celn theseidrawin'sr# j n n Fig'.- lisia central longitudmally jeitend'-l ing mechanism having the inventione1nbodied therein. 'l Figs. .and ,3 are,`

Figill. e y l .Y f

Fig; lis a detail view of the im'iroved vslip parts in a different positionv romthat'shown inFig,1 i ff y ln fthis illustrative construction the imjproved means ier initially ypositioning the drilling tool for facilitating the starting of a` hole is shown incorporated in a drilling mechanismo the same general type vas that described inthe copenlingapplication of one Morris P. Holmes,y Serial No.V 25,5,754,` filed February20, 1928. Thisdrillingmechanism n n lleasing7`v Herein supported A onev the drive sleeve 28 and in turn'supportingthe bearing sleeve 25v is aj retaining' sleeve or bushing" r31 comprises an adjustable tubular supporting ing vertieal vsectional vieivillustrating a drilldetail' sectional views taken respectively' on lines 2-52 and --fol to `a'usual driving` motor (not shown).` The ball bearing" 3 supported Within a swivelM frame` or bearing bracket lhaving'a sleeveV to kthe tubular arm l. Sivivelly mounted on the swivel bracket'fl is adrill 'generally desi gf; nated 6 and comprising a-plura'l part 'easing 'or rfAreNr `orercir-Ef3 housing`7 `provided'yvith anannular flange 8 rotatablyimounted in a bore 9 Vformed Within]` rthe swivel` bracketr Also secured' to" the Casing 7y as byscrevvs lO is a swivel plate 'K having lagrlng or annularflanged porti'onjl2y i rotatably mountedin a bore' 13 formedin the swivel" brackets and arranged in axial alinementwiththe bore 9L' Itivvill thus be seen n 1 tliatthe drill 6 maybe bodily swung relative" to the 'swivel brackets: about an axisperpenf vdicularto the axes 'of the transmission shaft 2 and the tubular supporting arm 1v.' In order vto securethe drill to the swivelbraclet inits different adjusted positions a' manually.` e'

operable clamping screvv lllis providedithis serevv beingthreadedly connected-to thef bracket 4' and engaging"I the bottom ofA av peripheral groove' l5 formed ion the swivel Y plate ll.` 'Y l As illustrated', the transmission shaft2 has fixed vthereto abevel-pinion l'6 meshing e 4sleeve y2:5.- This 'spur geark 24I-has a sleeve -v Vportion carrying clutch plates 426Whi'eli ,are

interleaved with clutch 'plates 27 carried by e a rotatable drivingsleeve or spider 28."A Thisl vdrive'sleeve is journaled in ball' bearings29` and 30 suitably supportedv Within the drill" interposed between the adjacent endsof the clutch plate and the bearing 30. Encircling the drive sleeve 28 and slidably mounted thereon is a clutch applying member 32 normally held in clutch applying position by al coil spring 33 encircling the drive sleevel 28 and reacting against a sleeve 34 abutting against an adjustable collar 35 tlirea-dedly connected to the rotatable drive sleeve 28. As

Y 42 for the drilling tool.

As shown, the gear 23 meshes with a spur gear r45 having a different tooth ratio from the gear 24 and rotatably mounted on a bearing sleeve 46. This gear 45 has a sleeve portion which carries clutch plates 47 which are interleaved with clutch plates 48 carried by a drive sleeve or tubular drivemember 49.

` This sleeve member 49 is keyed at 50 to a memberl in turn keyed at 52' to a sleeve or tubular drive member 53, the sleeve 49 being mounted on the member 53. The tubular drive sleeve 53 is journaled in ball bearings 54 and 55 suitably carried within the drill casing. The member 51 is interposed between 'the clutch plates and the bearing 54 and forms a support for the bearing sleeve 46. lAs illustrated the tubular member 53 is provided with a radial flange 56 interposedr between the inner race of thecontiguous ball bearings and a ball thrust bearing 5,7.,l j Slidably mounted on the sleeve 491s a clutch applying member 58 normally held in clutch applying position by a coil spring 59 encircling the sleeve 49 and reacting against a sleeve 60 engaging Van adjustable collar 61,.

threadedly connected to the sleeve 49. The mechanism for releasing the drive clutch 26, 27 and the feed clutch 47, 48 is substantially the same as that kdescribed in the copending application mentioned above and since 'it does not specifically enter into this invention further description 'is deemed unnecesary.

In accordance with this illustrative form l' of the invention the tubular member or drive sleeve 38 has formed thereon at its rear end a feed nut 62 threadedly connected 'to a. .feed screw 63 extending centrally within the driving sleeve 38, this feed screw being adapted to move inwardly and outwardly with respect yto the drive sleeve 38 as will hereinafter be deseribedl Keyed at 64 to a rearward extension 65 formed integral with the feed .screw 63 is a member 66 held in position by a lock nut 67 fthreadedly connected to the extension 65. This member 66 has laterally projecting keys 68 engaging longitudinal flutes or keyways extending throughout a portion of the bore within the drive sleeve 53, as clearly shown in Fig. l. The rear end of the drive sleeve 53 is closed by a cap member 69 against which the rear end of the member 66 is adapted to abut during the feeding operation of the mechanism as will later be described. T his cap member 69 is provided with a recess 70 within which the lock nut 67 is adapted to enter when the feed screw is in its retracted position.

In the operation of the improved drilling mechanism the tubular supporting arm is adjusted in a manner clearly described in the eopending application mentioned above and the drill suitably positioned adjacent the coal face. The operator then inserts the drilling tool 41 within the chuck 39 and then grasps the chuck casing and moves the drilling tool forwardly yuntil the cutting bit engages the coal face, the tubular drive sleeve 38, the feed screw 63, and the member 66 sliding axially relative to thesleeve 28 and tubular member 53. After the drilling tool of the drill is positioned adjacent the coal face, the driving ymotor is started and the'operator then suit;

ably 'manipulates the clutch controlling means thereby moving the clutch members 32 and 58 into released position, the coil springs 33 and 59 automatically applying the clutches. .Since the gear 45 rotates at a speed `slower than the gear 24 the tubular drive member 53together with the feed screw 63 are rotated at a. speed slower than the tubular drive member 38 yand as a result the feed screw 63 is fed slowly rearwardly from the position shown in F ig. 1 until the member 66 engages the cap 69-as shown in Fig. 4. W'hen the member 66 engages this cap axial rearward movement of the feed screw is prevenu ed and consequently, since the tubular drive sleeve 38 rotates at a speed slightly faster ythan the feed screw 63, the feed nut 62 moves axially forwardly relative to the feed. screw thereby feeding the drilling tool into the coal at a relatively slow drilling speed. After the hole is completed or if it is desired to change the drilling tool `the operator releases the clutch applying member 32 while the clutch 47, 48 remains applied.' Resultantly the tubular drive sleeve 53 together with the feed screw 63 arey rotated relative to the then stationary feed nut 62 and consequently the feed screw moves forwardly axially ata relatively high speed from the position shown in Fig. 4to the position shown in Fig. 1. The feed screw andthe tubular drive sleeve 38 thereupon turn together with no axial feeding movement. y The operator then grasps the chuck 39 and manually slides the tubular drive member 38, feed screw 63, and member 66 rearwardly into their initial starting posimissie,

l tion,` these partsy being shoved` rearwardly untiltlie memberv 65 engages the capy 69;'

:As a-.resiilt of this inventionit'vv'ill be noted that an iniprovedrotary coal drill isprovided CTT ,asaresult.thestartingof aliole is clearly facilitatedy Vitliaving been found that if the drilling tool nfere'rotated duringtlie starting of a liole the drilling toolivobbles oonsider- ',alilv and` the tool is deflected from its desired location, Fnrtliermore it will be noted that improved ineansis provided for initiallypositioiiing. the drilling tool V.thereby facilitating Y the startingof a hole`V the positioning means dliatl claim as new and; desire to sec-ure;

- and povvervr operated feeding means therefory mi by Letters Patent. is:

and yfeeding means therefor including coacting,relativelyrotatable feeding elements, and rotating means for one of the same including ...feeding elements i relative to saidrotating. means to initially'positionsaid tool.:

2, ln a drilling mechanism7 aldrilling tool.,I

and fee-'din means therefor including vcoacf# b means' for one of the saine including ."no' elements-relative to said rotate' J'. .r3 l y means to initially position said tool; said rotating lmeans thereafter being-operative to rect feeding movemontofsaid tool.

3; In. a'drilling mechanism -a drilling tool, and feedingmeans therefor including coactj atively rotatable feeding elements, and f means for one of the saine, said rongineans permitting-free axial movement aid feeding elements relative to tlievsame to initially position said tool,

t in a ,drillinoineolianism"a drillin 0*. toolv ing relatively rotatableffeedingelements, and

rotatingmeans for one of the same; said ro tating'means permitting .free aXi alf movement of said feeding elements relative to the same .tn initially vposition said tool, said feeding ave-,lement and vrotating means thereafter bee having improved .1 screw operatedy feeding means of thediferentialtype andliaving einbodied thereinl a slip motion or' sliding cone f nection whereby the drilling tool maybe initially positionedy acont. the coal face iandseing of an'enceedingly simple'cliaracter and the scope ina drilling mechanism, a drilling tool,

ineanspermitting free axial movement of saidl o" relatively rotatable feeding elements7V andy s permitting free axial movement off and feeding means therefor including coactsaid-tool.

ingloperative to eect A.feeding movement. vof

5. ln a drillingmechanismi a drillingftool,

and power operated feeding fmeans therefor' .l including enacting relatively rotatable feed screw andgnutfelenients,` and rotating means .forone of said elements including nieansper-rA mitting free axial movement of saidl screw.

and nnteleinent's relative to said rotating: n

position said tool during.\.75 I

means to initially starting of a hole.

6. lira drilling mechanism,a drilling tool, and potveroperated feeding means therefor includingreacting relatively rotatable feed., Y

'v screwl and i nnt. elements, androtating means for. one of said elements including means per mitting `free axial movement of` said: screw rand nut elements relative to'said rotating.,r meansy toinitially position 'said tooldnring' starting of alicie, said rotating meansandf4 1 screw and nut elements `thereafter being-operativeto eect feeding movement of said tool.

'i'. In aV drilling meclianism ar drilling tool,v

and power operated feeding means therefor including coasting" relatively. rotatable feed" screw andy nut elements, and .rotating means .for one of the saine,said `rotatiiig means peri mittingfree axialmovement of said feeding element 4rotated. thereby and said other feed; infr'r Lelement said tool during starting ofa hole.

8. .ln a kdri lling mechanism', a drilling tool,

including rcoacting relatively rrotatable feedv screw and nntjeleinents,androtating means for oneof the saine', said rotating means permitting :free axiallmovement ofv said feeding :element rotated thereby l .ing element relative. thereto to initial'ly'posi-` 'tion .said tool during :rotating means: and said screw and nut ele:`

ments .thereafter being operative' to" effectfeeding .m'cvementof said tool; 9. In a drillingmechanism,a drillingtool', v and power operated feedingv means therefor including coacting relatively ro'tatablefeed screw and nnt elements, androtating,:means"v for one of the ksame inclnding'av sliding 0011-. k1,15

nectionbetweeny the element rotated by said axial movement of said feeding tive to said rotating means to` tionsaid tool dnringfstarting of a hole.

l0. lira drillingvmechanism, a drilling tool, i l'tlierefor including coacting relatively` rotat# vable feed screw and nut elements, and rotating means yfor .one of the sameinclnding .a sli connection between the element rotated by said rotating means and the latter per-v initially position said tooldnringstarting of a lio-le, said rotating means and screw and nut and said! other feed- 105v starting of a hole, saidI rotating means and the latterpermitting free. elements relainitially posiand power operated feeding y'means relative thereto tol initiallyr posi# initting freeanial movement of said feeding .l elements relative to Vsaid rotatingmeans to f elements'thereafter being operative to effect feeding movement of said tool'. Y

11. 4In a drilling mechanism, a drilling tool, and power operatedy feeding means u therefor including coacting relatively rotatable `feed screw and nut elements, and rotating means for said screw including means permitting free axialmovement of said screw and nut relative to said rotating means to ef- M'fect initial positioning of said tool during starting of a hole.

12. In a drilling mechanism, a drilling tool, and power operated feeding means ltherefor including enacting relatively rotatable 1J feed screw and nut elements and rotating means for said elements for effecting rotation of the same at different speeds, said rotating means including means for permitting free axial movement of said feeding elements relfe iitive to said rotating means to effect initial positioning ofsaid tool during startingdof a hole. l

13. In a drilling mechanism, a drilling tool, and power operated feeding means there- ,..S'lfor Aincluding' coacting relatively rotatable feeding elements, and rotating means thereforr for effecting rotation thereof at different speeds, said vrotating means including means W permitting free axial movement of said feed- .fsoing elements relative thereto to effect initial positioning of said tool during starting of a hole.

14. In a drilling mechanism, a drilling tool, power operated reversible feeding means for `-said tool for feeding the latter forwardly and y rearwardly' including an axially movable feeding element, power operating mechanisms therefor, and a tool carrying elementy M.movable axially relative to said feeding ele- 40""ment, and means permitting free axial movement of said feeding element and said tool carrying element, relative to the power operating mechanism of the former to effect initial iositioning of said tool upon starting of a whole. a i Y Y l5. In a drilling mechanism, a drilling tool, and feeding means therefor including coacting feeding elements having relative yaxial iiiov'e1iient, actuating means for one of said ""fceding elements, a tool carrying member movable axially with one of said feeding elements and relative to, the other feeding element, and ymeans permitting free axial.

movement of said tool carrying member and ithat feeding element relative to which saidr tool carryingk member is movable bodily relative to said actuating means to initially position said tool. y

16. In a drilling mechanism, a drilling `tiool, and feeding means therefor including coacting feeding elements having relative axial and relative rotative movements, rotating means for one of said elements, a tool A carrying member movable axially with one of w'said feeding elements, and means permitting free axial movement of said feeding elements relative to said rotatin means wh1le the coacting relation of sai feeding elements is maintained to initially position said tool.

17. In a drilling mechanism, a drilling tool, and feeding means therefor including coacting feeding elements having relative axial and relative rotative movements, rotating meansrfor one of said elements including a final rotating element, a tool carryin member movable axially with one of said ceding elements and relative to said final rotating element, and means including a sliding connection between one of said feeding elements and said rotating element permitting free axial movement of said feeding elements relative to said rotating means while the coacting relation of said feeding elements is maintained tofinitially position said tool.

, 18.'In a drilling mechanism, a drilling tool, and feeding means therefor including coacting relatively rotatable yscrew and nut elements, a tool carrying member movable axially with one of said feeding elements, rotating means for the other of said feeding elements,y and means permitting free axial movement of said latter feeding element bodily relative to its rotating means to initially position the tool.

19. In a drilling mechanism, a drilling tool, and feeding means therefor including coactingrelatively rotatable screw and nut elements, a tool carrying member movable axially with one of said elements and relative to the other element, rotating means for said feeding elements including a final rotation element, and means including a sliding connection between one of said feeding elements land said final rotation element permitting free axial movement of said feeding elements bodily relative to said rotating element to initially position the tool.

20. vIn a drilling mechanism, a drilling tool,` feeding means therefor including coacting relatively rotatable feeding elements, rotatingmeansfor saidfeeding elements, and means permitting free axial movement of one of said feeding elements relative to its rotat-A ing means to initially position said tool.

21. In a 'drilling mechanism, a drilling tool, and feeding means therefor-including coacting relatively rotatable screw and nut elements, means for effecting rotation of said screw and nut eleinent-s at different speeds to effect axial movement of one of the same relative to the other, and means permitting free axial movement of one of said feeding elements relative toits rotation means to initially position the tool.

22.y In a drilling mechanism, a ydrilling tool', and feeding means for said tool including, coacting relatively rotatable screw and nut elements, a tool carrying member connected to one of said feeding elements and movableaxially relative tothe other, means toolcarryingmember,and a sliding connec- V, tion between sind screw element and its roment ofsaid ktion the tool,r

ltation means permitting free `axial move- 23. lnra drilling mechanism,a drilling tool,

- rotation means for said tool including arotating member land member slidablyy connected ytherewith and rotatable thereby, and feeding means for sliding said members azio iallyto effect feeding of the tool including co'- operating feeding elements one of which is connected'to said sliding member, rotating means'for the other feeding element, and a` sliding connection between said feed elementA rotating means andsaid latter feeding element. A 7 n '24. In a drilling mechanism, a` drilling tool, rotation means for said tool includ-A ing cooperating rotating members having relative axial movement, and feeding means for -the too-l including cooperating feeding elements one ofwhich is connected toV one of said relatively axially movable members, rotating means for the other feeding element, and a sliding connectionbetweeii said Vfeed relement rotating means and'said latter feeding element. Y i

'25. ln a drilling mechanism, a drilling tool, rotation means for said tool including a rotating member and a tubular member having splined connection withtliek rotating inem-v ber andrmovable aXially therethrough', and feeding means for the tool including a rotating tubular member, a sliding member Vhaving splined connection therewith and rotatable thereby, said member being movable axially relative thereto during rotation' thereof, and cooperating relatively rotatable feeding elements, one connected with said tubiilairotating feed member and the yother ,connected with said sliding feed member. i

,- Zlln a drilling mechanism, a drilling tool, rotation meansfor said tool including ,a rotating member, a `taibulafr member havingsplined connection with the rotating' member and movable axially therethrough,

and feeding means for the tool including ra 'rotating tubular member, a sliding member having' splined connection therewith and rotatable thereby, said member being movable axially relative thereto during` rotation thereof, and cooperatingrelativelyl rotatable feeding elements, one connected with said tubular rotating feed memberand the other connected with said sliding feed member, said feeding elements and said sliding feed member beinc` movable aXiall f relative to said tubular rotating feed member to permit bodilyniovement of the tool initiallyJ to position the latter,YV

27. In va `drilling mechanism, a

screw element to initially posi# a `'tatablethereby,*said member being movable axially relative `thereto during rotation thereof, and cooperating yre'latvely.,rf'itatable ,feedv` sci.ewanclf mit feeding l elements, one! con!v f a rotatingmember, a ytubular member having splinedfconnection withjthe 'rotating member and' movable axiallyrthe'rethrough, and 'feeding meanst for. the tool includinga ro-` Ytating tubular` meniber,. a sliding member having splined connection therewith andaronected with, said ,tubular rotating feed ineinber and tool, rotation for said tool including Y ay rotating meniben'a tubnlarmember ghav- "ing 1splined connection with the, rotation `'membei'c and movablev axially therethrough,

and vfeeding meansfor thetool includinga rotating tubular member, a sliding kmember having splined connection .therewith and ro- U ,e ,other connected with -saids'lid- Ving-feed'rieinber.

ifi a ,daling-mechanism, aariiiiag so tlatable thereby, said inembeiobeing movable` axially relative thereto during rotation therescrewA and 'nut feeding"V elements, one vconber and the other connectedwith said sliding'feed member,`said feedingelements and said sliding feedmember being movable aXi-YY allyrelative to said tubular rotating feed* member; to permit bodilyk movement ofthe tool initially to position the latter. l 29. In a drilling ymechanism, a drilling of, andeooiierating relatively rotatable-:feed Y i en nected with said tubular rotating feed memy tool and feeding means for said tool including coacting feeding elements having relative axial movemennactuating means for one of saidfeeding elements, a tool .carrymember-movable axiallywith one of said Vfer-:ding elements and relative to the other n, feeding element, and means permitting free axial movement of saidtool carrying member and that' feeding element Vrelative tok which said tool carrying member-,is movable,

30. In a drilling mechanism, a Ldrilling tool and feeding means for said tool includi ing coactiiig screw and nut feeding elements having relative axialand relative .rotative movements, rotating means for one of said elements, a toolk carrying member movableV axially with said other feeding element, yand means .permitting freeaXial movement of said feeding elements relative to said rotatico ing means while the coacting relation of said feeding elements is ,maintained initially to position said tool, one of said feeding ele-y ments moving rearwardly a predetermined distance after suchinitial positioning and.y prior to the feeding of said tool.

drilling tool,rotation means for said tool including A,

,31. In a drilling mechanism, a drilling rotating member, and a tubular member hav ing splinedconnection therewith and movable axially relative thereto, and feeding means for said tool including a feed member carried by said tubular member and a coactv ing feed member telescopically arranged within said tubular member, said feed members being 'movable freely axially with said f tubular member initially to position said tool. o 32. In a drilling mechanism, a drilling tool, rotating means for said tool including a rotatingmember and a tubular member Yhaving splined connection therewith and movableA axially relative thereto, and feedy 1 means for said tool including a rotatable n tu ular member, a feed member carried by said first tubular member, and a coacting` feed member rotatable withsaid second tubular member and telescopically arranged n gn within said tubular members, said feed members being movable freely axially relative to said second tubular member initially to po#v sition said tool. f, In testimony whereof I affix my signature. fr. RICHARD E. MURPHYQ Lehi" Maf.. y

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