US1690504A

US1690504A - Drill mechanism

Info

Publication number: US1690504A
Application number: US699110A
Authority: US
Inventors: Thore R E Rundqvist
Original assignee: Sullivan Machinery Co
Current assignee: Sullivan Machinery Co
Priority date: 1924-03-13
Filing date: 1924-03-13
Publication date: 1928-11-06
Anticipated expiration: 1945-11-06

Description

' 1,690,504 T. R. E. RuNDQvlsT DRILL MECHANISM Filed March 13, 1924 Patented Nov. 6, 1928.

UNTD

PATENT oFF-ICE.

"unioni: it. nntrnnvisr; or lcuiRinytorri*n,` Y'frA'Mrsfrr'ran, assrGfNojrz. ro sULLivN MACHINERY COMPANY, A CORPORATION or MASSACHUSETTS.

, DRILL MECHNISM.

Application 'led March 13, 1924. 'Serial lo. 699,110.

This invention relates to drill mechanism.

It has for its object to provide an improved drilling mechanism. Afurther object is lto provide a drilling mechanism having improved feeding mea-ns therefor. Another object of my invention is to provide a, drilling mechanism having rotation means for a steel and a pneumatic feed therefor with improved mea-ns for controlling the feed, which latter means is dependent upon the `inode of operation of the steel. 1t is another object of my invention to provide improved automatic means for reversing the drilling mechanism feed when the opera-tion `off the steel 'is not complete, such as when the steel becomes stuck.

In the accompanying olrawiirgs 1 have Shown for purposes of illustration one form which my invention may assume in practice. 1n these drawing`s, Y

Fig. 1 is a side elevation, partly broken away to show details of construction.

Fig. 2 is a diagrammatic viewV of the con* trol means for the feed.

Fig. 3 is a transverse vertical sectional view taken substantially `on line 3-'-3 of Fig. 1.

`In the illustrative form of my invention 1 have shown the same embodied in a drifter type of drill which comprises a combined feed cylinder and shell 1 having usual guideways 2 mounted on the upper side thereof to carry a drillingmechanism generally indicated at 3 as by gibs 4 slidably mounted in said `guideway's. More specifically, the drilling motor comprises a usual reci'procable piston 5 having a striking bar G projecting forwardly therefrom and into a chuck sleeve 7 rotatably mounted within la chuck housing 8 ycarried on the front end of the motor cylinder 9. Suitable means are provided forrotating the sleeve 7 and to thereby rotate the steel 10, .which means comprises a plurality of intermeshing rotors 11 carriedin a suitable casing 12 projecting upwardly from the housing 8 and` from which leads a suitable exhaust pas sage 13 communicating with exhaust ports 14CV formed in the4 housing 8. One of the rotors l1 is adaptedte actua-te a vworin wheel l5 formed on the periphery of the chuck sleeve 7 as by any suitable worinV not shown) mounted upon, a vertically disposed shaft carrying one of said rotors 11. As this part ofthe mechanism per se does notform .part of my invention it is not thoughtthat further detailed description is necessary;

Y The feed for the drilling mechanism 3 com- 20 within vwhich is Xeda member 21 as `by a nut construction 22.l Threadedly connected to a reduced forward portion A23 of the meinber 21 and projectingl forwardly through the rear Ycombined cylinder head and packing gland 24 is a hollow piston rod 25 carrying 'at its forward end a .piston 26 formed of several parts and held together as lbya hollow flanged nut 27 adapted to press said several piston elements against a rear flange 28 to hold the same in fixed relation; There is also vcarried by the member 2l a fluid conductingl tube 2 9 whichc'ommunicates at its rear `end with a chamber 30 and terminates at its forward end in a partition 3.1 carried in the Vforward poiationof the bore of the piston rod 25 while communicating as bythe hollow portion of the nut 27 with the front side of the piston 2G.

1n my improved construction l have pro; vided means whereby when the operation of the steel 10 is not complete or normal, such for instance, as when the same is preventedfrom rotating due to 'any cause, the forward feed will then be reduced or vented lto 'atmos- Tphere andthe reverse feed "actuated t'o fre'e the stuck steel or to vallow the complete Loper'-V ation bf `the same. This means comprises a spring pressed pilot valve 32 ibcip'rocz'rbly mounted within abore 33 formed in therean head 17 Asaid head also supporting the main control valve 34 adapted to cooperate with the pilot valve 32. Leading from the main control valve is a live pressure fluid inlet communicating with the central rportion of the bore 33 while a second live pressure fluid `passalge 436 likewise lea'ds from the main valve 34 and communicates with the inlet chamber 37 of the steel rot-ation motor 11. F rom said chamber 87 a passage 38 leads to the rear end of the bore 33 at which end valve 32 is normally held for forward feed by "spring 39 seated against a plug 4() closing theo'ppo site `end of the bore 33. This spring is so tenL sioned that the valve will 'onlly move when the steel is prevented from rotating. 1h the position shown in Fig. 2 live fluid will flow through the passage 35 aroundfan annular groove 41 forinedbn the periphery of the valve 32 und out throughA a passgeflQ leading to the bore of the hollow piston rod so as to rcommunicate adjacent one edgeof theL annulargroove 45 formed in the periphery of the valve 32. Vr)There is also, an exhaust port 4G longitudinally disposed from the passage '44 and communicating 'at the other edge of the annular'. groove 45 so that fluid flowing rthrough passage 44 atmosphere. l f u .V

lf therotation 'motorll should be stopped forany reason such as by 'awsteel sticking and While normal operating pressure. is Vmaintained,pressure in chamberpi" and Consel' ,uentlv in thelpassage 38 Will build up and thereby'sliift the valve 32 against the tension 'of the spring 39 so as to cut off coinn'iunication 'betiveen the inlet port and the for- Wardfeed passage 42 and'to alsov cut oil coinmunication between the exhaust port 4G` and reverse passage 44. During' thisoperation, however, thefinlet passage is'connected to the reverse passage 44 as by annular groove 45 which allows live .pressure i'luid'to flow through tube 29 to the front side of piston 25 to drive the'same rearwardly. During this operation the `rear side of the" piston is'fenhausted to the atmosphere. asbya-lloiving communication betiveenxsaid rear side, as by passage, 42, and an exhaust port 4? which communicates with an annular grooveV 4l when the valve 32 is'in its shifted position.

It Will thus be seen that I .have provided an improved drilling mechanism having an independent rotation motor supported by kand movable With a drilling mechanism and including an improved automatic valve control for the forward and reverse`feed,.such that upon the steel sticking the vreverse feed will be thrown in to release the same.`

lVhile I'have in this application specilically described one form which my invention may assume in practice, it Will be understood that this form o f the same is shown for purposes of illustration and that the invention may be kmodiiied and embodied in various other formswithout departing from its spirit or the scope of the appeuded'elaims.

7hat I claim as neivand desire to secure by Letters yPatent is: *i

. 14A drill mechanism comprising a `drillingmotor, a steel actuated thereby, a for- `ward and.reverse positive feeding A,means therefor comprising but asingle vreversible pressure fluid' actuated. motor, an independent `pressure fluid actuated rotation motor for said steel, and pressure fluid operated meansresponsive to the resistance to steel rotationfor reversing said feeding means.

2. AA drill mechanism comprising` a. drillingmotor, a steel actuated thereby, a fluid may be exhausted tothe kversing said feeding` motor.

pressure actuated forward and reverse positive feeding' vmeans therefor comprising but a single reversible motor, an ,independentrof tation motor for said steel, and means responsive to the resistanceto steel rotation for affecting the flow of fluid relative to the forward and reverse feed simultaneously.

3. A drill mechanism comprising` a drilling motor, avs'tee'l actuated thereby, a for- `Ward and reverse positive feeding means rotation -motor for automatically "affecting both of saidfeeds. -5 i 5. A drill mechanism comprising a drilling motor,v a. steel actuated thereby, "a forward andieverseA positive feeding means` therefor comprising' but a single reversible motor, an independent rotation motor `for said steel, and rmeans controlledl'byjsaid'rotation motor for automaticallyreversingsaid feed.` i, f f *1 ,t f

6. A drill mechanism comprising fa ldrilling motor, at steell actuated'thereby, afor- Ward and yreverse positivefeeding means therefor, aniiiidependent rotation -motor for saidsteel, `and afluid actuated valve controlled byfsaid rotation motor for automatically controlling-.saidreverse feed.. l .y 7. .A drill mechanism comprising a 'drilling motor,- a steel actuated thereby,l a ,for- Wardl and reverse positive feeding means therefoiyan independent-rotation motor `for said steel, anda fluid actuated valve con'- trolled by said rotation motorfor' controlling said reverse-feed, saidvalve being actuated only when said steel is prevented from rotating. i f ,y f' Y 8. rIn a drillingmechanism, vivorl performing means comprising a plurality/'of motors one of which `is of the reversible type, While another is rotary, and-means responsive to thetorque of said rotary motorfor automatical-ly reversing said reversibleinotor;

9. A drilling mechanism comprisinga rotary tool rot-ating motor, a reversible feed-` ing motor, and means responsiyeto the torque offsaid rotary motorforautomatically relOuA' drilling' mechanism'comprising a motor forhammering adrill steel, ay motor.

for-rotating the steel, a ymotor'for feeding thesteel, one of-said motors beingof therev'ersible type, and means responsiveto the torque ofone of said motors for, automatically reversing 'said reversible motor,

loo

11. A drilling mechanism comprising a drilling motor, a drill steel actuated thereby, an independent motor for rotating the steel, reversible means for positively feeding the steel in opposite directions comprising but a single reversible motor, and means responsive to the resistance to rotation for automatically controlling said feeding means.

12. A drilling mechanism comprising a drilling motor, a drill steel actuated thereby, an independent motor for rotating the steel, reversible means for positively feeding the steel in opposite directions comprising buta single reversible motor, and means responsive to the resistance to rotation for automatically reversing said feeding means.

13. A drilling mechanism comprising a drilling motor, a drill steel actuated thereby, an independent pressure iuid actuated motor for rotating the steel, reversible means for positively feeding the steel in opposite direc tions, and means including a valve responsive to the pressure changes in said rotation motor for automatically reversing said feeding means.

14. In a drilling mechanism, lwork per forming means comprising a rotary motor, feeding means therefor comprising a reversihle motor, and means responsive to the torque of said rotary motor for automatically reversing said feeding motor.

15. In a drilling mechanism, work performing means comprising a percussive m'otor and a rotary motor, a reversible feeding motor therefor, and means responsive to the load changes on one of said Work performing motors for automatically reversing said feeding motor.

16. .A drilling mechanism comprising an impact motorfor actuating a drill steel, an independent motor for rotating the steel, reversible fluid actuated means for positively feeding the steel in opposite directions comprising relatively reoiprocable cylinder and piston elements, and pressure fluid operated means responsive to the torque of the rotation motor for automatically reversing said feed- 17. In a drilling mechanism, work performing means comprising a rotary motor, reversible means for positively feeding the same forwardly or rearwardly comprising but a single reversible motor, and means responsive to the load changes on said rotary motorffor simultaneously affecting both of said feeds. Y

18. A drill mechanism comprising a drilling motor, a drill steel actuated thereby, feeding means for said steel for effecting positive forward and reverse feed thereof comprising but a single reversible motor, an independent rotation motor forsaid steel, and means Ie` sponsive tothe resistance to steel rotation for automatically reversing said feeding means.

19. vA drill mechanism comprising a Huid actuated drilling motor, a drill steel actuated tliereby,fli1id actuated feeding means for said steel for effecting positive forward and reverse feed thereof, an independent fiuid actuated rotation motor for said steel, and means responsive to the pressureohanges in said rotation motor due to the varying resistance to steel rotation for automatically reversing said feeding means.v

In testimony whereof I affix my signature.

THORE R. E. RUNDQVIST.