US1774035A - Rock-drilling mechanism - Google Patents

Description

Aug. 26, 1930. c. F. osGooD I ROCK DRILLING MECHANISM Filed Deo. 26r 1922 lll l''artentecl Augi."26,193() a I osGooi), on l .eHRLn sinT s 1. RoonLiner'tiernak MECHANISM Application@meanecembef 26,1922. seriarNoL-eoaia?.

{Myinvention relate'sk'to n anisms, and more particularlyfto improyed controlling mechanisms. for that typelofrock drilling mechanism vknown asa stoper. l

' .An object of my invention is to providev an improved rockfdrilling .mechanism.' Another object of myfinvention isto previde an improved feeding. mechanism y having `Vim'- proved .('zontrollingv means. furtherl object of my invention is .to provide-animproved controlling means for' pressure fluid feeding mechanisms especially adapted for (use in v' that class of rock drilling work known vasy .Y stoping and in which thecontr-ol mechanismy may be most conveniently located. Other objects and advantages of my invention. will hereinafter more fully appear.

In the accompanyingv drawings I have yshown for purposes of illustration one form which my invention may assume 'in'practice In these drawingsf# Y Fig. 1 is' a view Ypartially in elevation` and partially broken away, showing a drilling mechanism embodying my improved construction. y

Fig. 2 is a section on the line 2-2 of Fig. 1. Fig. 3 is a section on the line 3-3 of Fig. 2.

For purposes of illustration I have shown' my improved feeding mechanism. employed 1n connection Wlth a percussivemotor 1 of well-known form, which motor is adapted to impart a series ofblows to adrillsteel2 and to be maintained in proper relation to a drill steel as the hole is 'deepened v by a feeding mechanism 3 herein of well known form com- Y `prising a cylinder 4 having a bore 5 in which a piston 6 is disposed. :As shown, this piston Y Y 6y is provided with apiston rod 7 and when the extremity of the latter, which is provided `against some solid support, admission ofl air with an abutment engagingpoint 8,` isfixed to the feed cylinder 4 will cause the same and the drill v1 to be advanced relative tothe pis- Vton 6. Any suitable controlling valve 9may be employed for the purpose .of controlling the operation of the motor 1 and the supply of operating fluid to the feeding mechanism', a port 10 leading from the throttle valve 9 and being controlled by. the latter.

l have herein provided improvedccafiiml#u ligfgzifleqhnisiilffof' tilgfedig.megehafism Which'i's adaptedto render it possible; to coi.

troll theaction of the'ifeediyely closely. manual grasping handle 11 is arranged;

jectingV laterally f from thefdrilling ymech e.; 'nisin at a point betweenthe feedingmela Anifsmfar'id the rear end of the motorl. ThisV handle ism'ade Vhollow as indica-tedat"12l and has :a hand kgrip `portion 13 turned atgright ri-agite to the body of are handle and; into mechanism.` Arranged. .partially inv anintel?` mediate headfll betweenthemotorla'nd the .feeding mechanism and .partially infafbossf 15 at ftheforward endl ofthe feed Vcylinder 4- is la''control,valve.. controlling thesupply of ,pressure Huidl from-the vport 10, to a .port .16 which'opens'into the .upper endfofthe feedv cylinder.` 'Thisfizalvemechanism comprises a recess 1 7 having a valve seatf18latj its rear; ward. end .withwhich a valve .member 19 reciprocable inthe `recess'17 isfadapted to co`-` Y operate. .The valve. memberl 19. .is .provided with ,a shoulder or, .collarV ,'20pupon whichfa spring 21, Aseated in f an. enlargement-17' of the recess '17,. presses.y vApassage 22,extends from its-pointof communication with Vthe portlOfto apoint adj acentthe valve seatf1i8 and opens; atright angles tothe lengthofithe i recess 17 intothelatter ata pointlsoselected that the v:port 22 may-be uncovered Whenihe springl 21 hasfforcedthe rvalve member 19 to its eXtreme forward position. v'I`he.fport v 16V .opens through the' middle fof the-valveV seat .18.* The valve` imember; 19 is'fprovided stem, 28,'while at itsotherfend 28`itislen- 'gaged the stem29 lofpacontrol button. .530. The stem 29 yis provided with afcollar 31V n.

yagainst Whichjawspringy 32,` located in aigrecess?) inthe portion13 of thehandleycoacts', thespr-ing.82holdingV thesteml29 in elevatedposition so'` that the yvalve` 19 .is nor- Y mally" maintainediopenf. It willy beundersteed. that Itheir.)atten Benam.eperatedby 6ol parallelism with the. airis ofthedrilling vthe thumb or by a finger or in any other desired manner by the drill runner.

f From` the foregoing description, the mode of operation of my .invention as shown herein for illustration will be readily apparent. The drilling mechanism will lbelarranged in position to drill a hole. The throttle valve 9 will be opened to supply `air to theport l() and; if?. @peset-.Mlle motor, 1.-. -Bypdepressins the button 30 a-ndfsothe stemI 29, the lever-26 I Vmay be oscillated about its pivot 25 andy caused to move the valve 19 toda `position; to close Voit' communication between the ports i 22 and 16, and so' the strength of feed may 'ber readiiy c orntrolled,yj ust enough Cair being'adf mated pagina :yeivell 19 te hola the drin yup position during spotting' It willbe posv sible,}after thelhole is l started, by rel/easing button i to `allevv f eed -at sub'stantially full air pressure and at anytiineby depressingy the vbutton 3Q tliefsupplyk ofair to the feed. cylinderniay` be interrupted 'and by reasorio'f leakage, orfexp'ansion; 'should the feedbe veryrapid,l the force of feed will be Vquickly reduced i While I'khavein described one form which my invention may assume in'practice, it .will be.understoody that thii's'form.` of the saine .is shown. for purposes ofil'lustrati'o'n and,` that the` invention may be modified andv embodied in ,various other V:forms withoutdepartingfroniits spirit or the scope ofthe appended claimsf I claiin yas new' and desireto secure by Lettersy` Patent :V

1; In a y'rock.arming mechanismen@ @en i lbination with ya hammer drill and a pressure iiuidl feeding device attached thereto', of a handle f*or;isupportingV said drilling mechaf nismvvproje'cting laterally a substantial dis tance therefroim ymeans for controlling the admissibnof air to the feeding device includa'member .arranged adjacent the inner endof said handle anda pivoted lever cooperatingwiththe samev extending to a point 'adjacent' the outer end of said handle,and manual ynieansfo'r actuating saidv lever to op'- eratesaid control means. I' l Y 2; In ailuidv pressure tool, the combination with "a *hammerI drill and a fluid presf siire feeding device attached thereto, control; lin" means.for"said feeding device including a iiidsnpply port for :admitting pressure 'iuid to saidffeeding. defvice,a valve movable its te interrupt' supply through.. said port, a

.handle having aigrasping portion arranged parallel to the lengthl oflsaidl drilling mechanisi', and means arranged Vin land movable :f Sad last mentioined' portion for' controlling saidyalveI!l I drilling mechanism com'j'nising work performing means and` pressure fluidgoperated feeding 'means therefor; a lsupporting handle projecting from said mech'anism having-a vportion adapted to be grasped" by the thisgapplication operator, and means including a valve remote from said grasping portion, and a pivoted lever cooperating therewith enabling the operator to control the How of pressure iiuid to the feeding means by but a single hand without removing said hand from said handie. l

4.-. -A drilling mechanism comprising a drilling motor and, pressure liu-id voperated feeding meanstherefona supporting handle projecting from said mechanism adapted to v,be.grasped byithe operator, an element interposed between said motor and said feeding `means vhaving a fluid passage formed therein signature. x

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