US917074A - Rock-drill. - Google Patents

Description

306K DRILL.'

APPLICATION FILED MAR-10, 1906.

JACKSON.

ROCK DRILL.

APPLIOATION FILED MAR, 1o, 1906.

Patented Apr. 6, i969.

2 SHEETS-SHEET 2.

INVENTUR.

Cum/vm. STAI: KSU am striking' position occupied by it in Fig. 1.--

" barrel back of the port 26.v -As a result each the hammer is not quite parallel to the tool i 'ave shown this/clutch between the worm 30 i fally opposed 4longitudinally eXtendingIslots 27 into whichextend keys or. ribs 28l of 5a tool sticksthe hammer. member flies back member -11 rotates.

1I have provideda shaftl also las loosely mounted upon it a gear wheel 32 which is tionof the casing surrounding the body ofthe direction indicated by the arrow, each 1 hammerl 13 is moved by centrifugal force from whatever lposition it may be into the The outward movement of the ymembers 13 are cushioned by the washers 21.

When each hammer member strikes the adjacent end of the piston 14 the hammer slides back in its barrel 12. The backward movement or rebound 'of each hammer at this time is cushioned by air in the portion of'its' blow is struck without greatly jarrinv. the apparatus, The relative movement oiP separation after impact between the hammer member `and piston is always sulicient toallow the hammer to clear the tool. If the farther than it might otherwise do. I prefer to arrange the hammer andpiston so that.

andthe last gear 32 of the train, but it is evident that this clutch may be laced between any two of the members w iich go tc makeup the vconnections between the memberl-"l and the piston.

The piston 14 1s provided lwith diametricworm wheel or gear 29 whereby the gear is slidably but-non-rotatably mounted on the piston. The gear 29 meshes with a worm 30 keyed-to a-shait 31 j ournaled in the frame and extendin parallel to the shaft 10. The

geared to the shaft l() through gears 1 33. The gear v wheel 32 drives the shaft 31. through a friction clutch comprising the friction surfaces'34 and 35, spring 36 and adjustable abutment 37'. .f

A chamber 38 is formed in the barrel por- .chamber 38 andthe'bore 440i the tool 43 vreceiving socket. j A. i providedfwith a shoulde I and with an enlarged:l portion` subst' through slots formed yfor the shoulder 45'.

Imoved backward Fig.' 1 by the springs 49 I tgwillfhe-under-'f frame 1 is'- advancedffasthe,

the vpiston 14 through which a fluid 4is admitted from a suitable reservoir or p -np through the pipe 39 connected to the cover member 40. y Preferably Athe fluid employed iswater, 4though air may be used under some circumstances. To. prevent escape of lthe fluid entering the chamber 3S along the'si'irface of the iston, packing members 41 are .Should the tool stick the I `nection between the gear 32 and the-shaft'. 3.1

employed w ich are held in place by a helical spring 42.

shown, in Fig. 3 the forward end of the iston member 1`4'i's provided'with a socket into which the hollow drill` bit or other v{ ool 43'is mserte'd. passage54 in thepi establishes communication between I tubularackingv44 is provided -forpr venting lea ageol thefluid out of theto The tool 43. Vis n which abuts against the end ofjthe'pisto.

tially rectangular in crossesection which ters a corresponding recess 465m` 'the' end-oi 1 the piston 14. The outer end ofthe-piston 14 is located Within a chambered'c1'oss'lbe ad v i member 47 which is connected to the casing lAs shown, helical springs 49 A -the bolts 48 and extend between f 1 by bolts 48. surround the forward surface ofthe cross-head andI nuts 50` carried atl the forward ends of thev r bolts. i To securev the drill bit 'in place-a 1 1-,4

shaped' device 51` is employed whichpassesl forward end of tliecross-hea Ymember. andifiio straddles thedrill bit or tool in frontof the 'Y head inthe 1position shown clearly -in'Fi'a 1 and 4.at w backward. limit ofl its movement with the shoulder 52 formedbnv it engaging -ftheforpv Wardlen'd ofthe barrel portion ofthe 'casing y1 surrounding the piston.' teninor member .51l is shaped and arrangedto hoId thejdrill bit firmly in the socket'm the piston..

In'the normal operation of the device the motor 7 rotates the shafts 10 and 31 and' lcauses vthe hammer members to deliver,

ich time'the piston 14;is atl he key .or fas-l y In the *stationary .position of." l the apparatusthe lsprings 49 hold the crosse'L rapid blows upon' the inner end of the pis.

to'n 14.

of the Worm-wheel 30. is obtained. This resul'ts 'in afslow rotation of the piston 14 and the tool 43. i At 'each' blow on the inner end of the piston 14 the piston and drill'bit'arev advanced more orless working.` lAfterv each blowjy the" piston-fis to the position shown fin stood that the material upon'` 'which theftoclisbperating is' The -iuid enteringthroughfthe,v pipeQ. passes' outward to theuf'orkmg. edgeof Pthe tool and causes the chips lformed-by the tool to be forced awaifrom its cutting'- edge. lith .the vtool s depending on the-na-` ture of the material onwhiclr the toolis" The rotation of the shaft 10 causesf the gear wheel 32 to be'revolved and throughV the friction 'clutch a corresponding rotation;

Vown. theyA may escape through the passages 53 formed in thetool. f

yields and prevents stripping of the gears .or

rictionclutch cony standoointe of durability orner-i other injury of the apparatus-- Should the tool not be in contact with the Work, et the instant the pieton is giyena hammer blow' the entire energy of the blow is tal/ien '1ro by the belier. springs 49.

The construction hereinbefore" described and illustrated has been found in. 'actual practice to give excellent resuitsfrern the and eiiectiyeness. it will be obvious, however, to those ASkilled in the nrt that changes may be made in the forni oi vmy invention Without departing' roni its spirit, und that certain features or .my

at one side of a line radial tothe exis of ro- Vline of movement of the hammer.

incr member tation ci the body and perpendicular to the In combination, a rotating ing e cylinder formed in it, the axis of which is tangential to the axis Aof rotation, a l1amlocated in said cylinder and iree to move axially therein under the actie of centriiugaliorce, the center of grayityroi Said hammer member being at one side of e. line .'ailial tor the axis of rotation of said body and perpendicular' to the line offn'rove ment of the hammer.

in combination, a rotating body having a chamber formed in it, a hiimmer member located. in said chamber and free to'niove axially therein under the action oicentriingel torce, the conter oi gravity oi said hambody hav@ `mer member being et one side of a line radial to the axis of rotation and perpendiculaithe line of movement of the liamn'ier, o device 'in position to be struck vby said hammer, an(` inea-ns for cushioning the han,

nier when it rebounds 'after each blow.

in combination, a rotating body having a pair of hninmer receiving chambers formed in it, said chambers being located one at each side of and'ecuidistont lromthe axis oi' rotation of said bm y, and two hammer mem-- bers one located in each or" saideben'ibers and eech free to have a limited movement in its chamber in a line tangential to a circle abontsaid axis es a center.

5. in con'ibination, a rotating body, and a hammer member elidably mounted in'guide ways permitting of a limited movement of said member with respeetto said body in a direction tangential to a circle about the axis of rotation oieaidI body as a center.

ii. combinotion, e rototingbody having a chamoer formed in it extending tangential to a circle about 'the eine rotation oi said body cer-ite eliamnier iernber free' to here lin'iited movement in seid cheniber, seid hemmer member having a rcenter oi gravity at eil at one eine oi e line radial to the axis oi rotation oi' the body and perpendicuiar to the 'iine of movement of the hammer.

'7. ineomb' etion. a rotating body hey/ing ve cheinber formed .in it extending tengentiaily to a circle abonttbe eine oi rotation 'of sind body ae a centen-end a hammer member located in seid chamber end free to have e limited increment therein in tbe direetionoi the length oi the chamber, the center of gravit, of seid member being at all timee'et one side of a line radial to the axis of rotation oi' said body ond perpendicular to the line of movement of the lienimer.

. in combination, e rotetlng body, a

member olidinglyconneeted thereto to have a -iirnited movement with respect to seid body in e direction .engontial to e, circle drown about the erde of roteticn et' tire body as a center,

the member being' lie-ld et the forward linnt its noyenient having reference 'to the directx rotation oi the body, and e de vice in position to be Struck by the seid -hexrnner once in eeen revolution ci seid body.

in a roeii diifii or the like, a tool, a rotating body the eine oi which ie et right angles o to the line oi movement oi the tool, one or more e'siieinbers formed ineeld body, and e 1nenfnner member siidingiy located in eeeb cheminer end oriented to be moved by centriingel torce when said body rotated into the position in wbich it *ti/iii strike said tool..

l0. in combination, o rotating body hay ing e, cnen'iber i'orniedin it, n hammer member located in said chamber and free to more from one poe 'on therein to another position under the action oi centrifugal force, a de- 'yice in e position to be strucii by said. hemnier, ond ineens :for cushioning the hammer when it rebounds at each blow.

l l. In combination, e tool,` a rotating body having e chamber formed in it, a hammer member comprising a piston located in e id chamber and a portion projecting therefrom, said hammer itu-)ingl so arranged that centrifugal torce norm-:illy tends to move the pieton into e 'position in which said projecting portion is adapted to engagesaid tool, e port leading from seid chamber, said port being exposed when the hammer is in' striking position but closed when the nanimer is moved back from said position.

i2. in combination, a rotating body hay .ing e chamber formed in it, and a hammer member reciprocating in a straight line and locatedin said chamber, said member being' moved into a striiiingposition by the action of; centrifugal force and capable of yielding out of the striking position et each biow l strnek bv it.

striking position by centrifugal force, seid member having en eir chamber et onefside of seid. hammer for cushioning and limiting the movement thereof out of the striking position. .V v

l5. In combination., e rotating body, e hammer member se'eured thereto so that it is tree.to .be moved outoi the striking nosition by therebound at each herinner blow imported and to be returned to the striking; position by. centrifugal foree, und resilient Ineens for limiting the movement out of the striking osition, saidmeenseoniprising en stir chem er, and e ort therefor open when theheinrner is in t e striking 'l osition. sind closed by the movement of the ifnnrner out o the striking position.

i6. in combination, e rotating body, hammer .member siideblyv mounted on seid 4body and eepeble of limited movement e. tangential direction, and Ineens for oushioning the movements oi seid herinner.

l?. In. combination, nv rotating body, e herinner member slidobly secured theretoso einem that it isiree to bemoved out of the striking f position by .the rebound at each hammer bioW and to be returned to the striking-position by Aeentrifngal force, said body having an oir ehe-miner for cushioning the movement, of'

i'zhe hammer ont of the striking osition, and 45 e port .ieeding from said chain er, the port being so proportioned and arranged that 1t is open when the herinner is in the strikin posit-ion end is closed by the movement o Athe hammer out of the striking position.`

13., In. combination, e rotating body hav; ing chamber therein, end a, hammermeinv ber iooseiy arranged in seid chamber for ited bodily .movements in e direction. ten"- gentiel to e circle about the4 exis of rotation oi. said body. y o Y i9. in combination, a rotating bodyhavg-j ing e oharn'ber formed in it, a hammer meinber located. in seid ohernberV and free to move-f bodiiy from one position therein. to another Go position under the action of centrifugal force, l 1 v e device in s. position to be struck by seid.

herinner, and .ineens for cushioningthe haminer when it rebounds eteachblow. y i. I,

20. in combination, e rotating member, e eentrifugellyeotueted hammer device vslidi ably mounted on theniember and freer to o have e iirnited bod-ily movement with ree'peot to the vmember in etengentiei'direei' ineens tor cushioning the movements or; sind 70 herinner device,

.ln Witness whereof I have hereuntoset my hond this 5th dey of March, 1906.

orient-n nA torreon "Witnesses .n-Jnriirniinomrr A; J.. .lnnnznn

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