US1216689A - Feed mechanism for drilling-machines. - Google Patents

Description

Patented Feb-.21119112 3 SHEETS-SHEET l.

(kia, if/56am( J. G. HEY. FEED MECHANISM FOR DRILLING MACHINES.

` APPLICATION FILEDy JULY 13, 1914- l v 1,216,689. Patented Feb. 20,1917.

3 SHEETS-SHEET 2.

I. G. HEY. FEED MEcHANlsM Foa Damme MACHINES. l APPLICATION FILED JULY I3, I9I4 1,216,689, Patented Feb. 20,1917.

I all whom t may concern:

UNITED sTATEs CINCINNATI, orIIo;Ass'IGNoR To CINCINNATI PULLEY MACHINERY JoHN HEY, or

PATENTQCEEICE.

COMPANY, OECINCINNATI, oHIo, A CORPORATION.

FEED IVIECHANISM VSpecification ofetters Patent.

E018 DRILLING-MACHINES.

. Patented Feb. 2o, `191i 7.

Apniiaieniiled Jury is, 1914. seria1No.s5o, 751.

Beit known that I, JOHN G. HEY; a citizen .of the vUnited States, and a resident of Cincinnati', county of HamiltonJ and State of Ohio, have invented certain new and useful Improvements in Feed Mechanisms for Drilling-Machines, of which the following is a full, clear, and exact description.

The invention relates to feed mechanisms for drilling machines', and seeks to provide an improved construction by which the drill spindle may be fed either by power or by hand as desired, and also seeks to pro-j vide an improved trip. mechanism 'for automatically arresting or reversing the move ment of the drill spindle at the ends`of its working and return strokes.. A further' object of the invention is to provide an improved feed mechanism by which thereversal of the,movement of the drill'spindle is automatically effected both at the'end of its workingv stroke and the end of its return stroke, and which .may be adjustedto yeffect the automatic reversal of the spindle at the end of the working strokel only. Further objects of the invention are to provide. an ,improved power feed for the drill forwardly and rearwardly projecting arms i drill spindle.v

spindle,l which is at all timesunder control of the operator, and to provide anv improved feed which will afford a quick return of the With this and other objects-in View,A as will presently appear, the invention corrsists inthe features of 'improvement herev inafter set forth, illu rated in the pre-v f-ferredform in the accompanying drawings ard or pedestal 1 mounted upon a base por-- tion 2, and provided at its upper ends'with the machine, in the con-H 3 and 4. The arm 3 is provided with a suitable bearing4 for the vertical drill spindle 5 vand a pulley 6 is mounted on the spindle above the arm 3. A slide or carriage 7 A is mounted on the rearwardly projecting arm 4 ofthe pedestal and carries two idler pulleys 8 and 9 which guide a drive belt 10. The b elt 1() connects the driven pulley-6 on the drill spindle 'with a driving pulley 11, which is mounted upon a counter-shaft12 at the lower rear portion of the machine. Thecounter-shaft 12.i s mounted in a bracket 13 which projects rearwardly from the base portion '2. They driving pulley 11 in the form shown Vis providedv with a series of Y steps, and is adjustable on the counter-shaft 12 so that belt 10 may engage any "of the -steps to thereby drive the drill spindle at different speeds.- The slide 7 on which the idler pulleys 8 and 9 are 'mounted may be adjusted in any suitable manner to place the belt under tension. .Other suitable means may be employed for driving the drill .pindle at 'different speedlratios relatively to the driving shaft.

The drill Spindle ais ef eenige, freeie shift vertically through the bearing on-thex arm -3 and through the pulley A6,-.and as lsual is provided with a .supporting sleeve 14 which is connected to Shift vertically with the spindle, but which, in the usual'.VA

mannerfis held against rotary4 movem ntv within a bearing 15 at the louter end o f guiding head 16. The head 16 .is vertically adjustable upon a guide 17 on the frontS The inner end of the head is'split in a vertical direction and a of thei standard 1.

. hori ntal clampscrew l18 provided witha 4ha le 19 .isadapted to secure 'the head In the adjusted position uponfthe guide 17.

A horizontal -feed'shaft 20 is journaled in the heed. 1e and is provided with e, pinion 21 which meshes with a rack 22 that is fixed to the sleeve 14. IThe sleeve ris provided with upper andelower stop collwars 23 and 24r for limiting the movement of the sleeve and \drill spindle relatively to the head. JThe ,lower stop collar 24 is secured to the sleeve by a set screw 25. The upper stop collar is split and a bolt 26 extending through the' ends'thereof serves to cla'mp it 1n adr" justed position uponnthe sleeve. The feed vshaft '20 may be rbtated leither by power or by hand. For controlling it by hand,

the feed shaft is. provided on one end with la hub 27, having radial handle bars 2 thereon. The hub is preferably loosely mounted on the shaft, being held in placelthereon bya washer 29. When it isedesired to feed the drill spindle by hand, the collar 27 is locked to the feed shaft 20 by a clutch pin 30. This 'pin ismounted in a sleeve 31,

which is secured within a radial socket in the hub 27. A spring 32 coiled about the pin extends between its enlarged innerend and the outer end of the sleeve 3,1 and tends to force its inner end into avsuitable socket as shown in F ig. 3, and a pin 34 fixed to or seat formed in the shaft 20. The outer end of the locking lpin 30 is provided with a small hand-wheel.A 33. rlhis hand-wheel is provided with a notch in its periphery the hub 27 is larranged to extend through this notch. 'By means of the small hand.

wheel or finger-piece33, the llocking pin 30 may be withdrawn from engagement with the feed shaft 20 and the handle may then be rotated so that it rests upon the outer end of the pin 34. ln this way the handle bars 28 may be 'readily disconnected from the shaft 20 when the power feed is 'em 30 ployed for rotating Athis shaft. W

wheel and the adjacent face of the clutch member being provided with suitable interlocking teeth. The clutch member is keyed to the shaft to slide axially thereon. clutch shifter 37 is provided with a rounded 10 inner end portion 38 which engages an annular groove 39 in the clutch member so that the latter may be moved axially into and out of engagement with the wormwheel 35.

45 outer end of the head 16 is cut away on one side to`form a recess 40 within which the clutch shifter 4is mounted. The bearing portion 1s also provided with laterallyprojecting upper and lower flanges 41 and 42 50 on opposite sides of the recess 40, and the' @5 the lower section of the casing being adapt- Jas hereinafter set forth, for automatically throwing the clutch shifter.

The worm-wheel 35 is driven by a worm 46 on'the lower end of avertical countershaft 45. A casing formed of upper and lower sections 47 and 48 is fixed to a head 16, and incloses the worm and' worm-wheel,l

The bearing portion 15 at'the,"

ed to contain oil within which the worm.v

wheel runs. The inner portion of the'casing is alsoprovided with beaiaings for the vertical counter-shaft and the worm is fixed to the shaft within the bearings so 'that the shaft is adjusted vertically with the head 16. The upper end of the countershaft telescopes Within the lower .end of a hollow shaft 49 which is provided on its upper end with a gear 50. rfhe gear 50 meshes with a pinion 51 on the lower end Iof a sleevek52, and the latter is provided at its upperend with a pulley 53. This pulley is preferably provided with a number ofl-steps as shown and is adapted to be connected by a belt 54 to any one of a series of steps 55 formed upon the' upper portion V of the spindle pulley 6. The stepped pulley 53 sleeve 52, and pinion 51, are mounted upon a've'rtical stud shaft 56, which is lixed to the end of Aan arm or bracket 57. The

arm or bracket 57 is preferably in the form of a casing for inclosing the gear 50 and pinion 51, and is provided with a suitable covered belt 58. rllhe inner end of the arm or bracket 57 i's provided with a depending sleeve 59, which surrounds the hollow shaft 49 andwhich is arranged within asupporting bearing 60 that is fixed tothe side of the frame arm 3. Thesupporting bearing 60 is split and sections thereof are connected by bolts`61 to thereby clamp the sleeve- 60 and arm 57 and hold the same against movement. By loosening the bolts, the arm 57 and the pulley 53 carried thereby can be swung about the upper end of the shaft 49 to place the belt 54 under proper tension. In this manner the drill spindle, and the vertical counter-shaft 45 which actuates the power feed of the drill, can be driven l at a4 number of different speed ratios. A collar 62 in the lower end of the sleeve 59 engages the lower portion of the bearing 60, and a collar 62 on the hollow shaft 49 engages the lower end of the sleeve 59.

rlhe clutch shifter 37 is provided with a forwardly projecting, inclined cam lug 63, which is arranged to be engaged by the coneshaped endsrof a pair of tappets or trip pins 764 and 65, which are mounted respectively on the upper and lower stop-collars 23 and 24. The upper trip pin or tappet 64'is threaded through an opening in the stopcollar 23, and is provided with a knurled `finger-piece 66, by which it may be adjusted in 4position upon the stop-collar. -When the power feed is in operation, the wormwheel-35 is connected to the feed shaft 20 by the clutch 'member 36 during the workingstroke to feed the drill downwardly by power. At the end of the working stroke, pin 64 is projected -through an opening 67 in the flange 41 and engages the inclined cam lug 63 so that the clutch shifter 37 is moved to thereby disengage the clutch collar 23 is adjustable in position upon the member 36 from the worm-wheel. The stop spindle sleeve 14 and trip. pin 64 may be adjusted to a nicety upon the stop collar so that the downward feed' of the drill is4 gagedeither with two shallow sockets 71 in the stop collar, or with two deep sockets or holes 72 in the-Lstop collar, the. latter position being shown in dotted lines in Fig. 2.

If the lower trip pin 65 is in its operative position, shown in full lines in the drawings, it will be projected throlfgh an opening 73 in the flange 42 at the end of the return stroke of the drill, and, by engagementV with the cam lug 63it will move the clutch shifter to othereby engage the clutch member 36 with the worm wheel 35.

In this way, the reversals in direction of the movement of the drill, both at the/ end of its working stroke and at the end of its return stroke, can be automatically effected.

If desired, the lower stop pin may be shifted to the inoperative position'shown in dotted lines Fig. '2, so the automatic reversal in the direction of movement of the drill is only effected at the end of its working stroke. i

Whether the lfull automatic or the semiautomatic feed is employed, it is-at all times- I under the control of the operator through `themedium of the clutch shifter 37, whichl can be manually operated by means of the handle 44. By adjusting the upper stop collar 23, the-upper trip pin 64 may be shifted to inoperative lposition so that the power feed can be entirelyhand-controlled.

By throwing the clutch member to inoperative position and, connecting the handle bars 28 to the feed shaft 20, the lworking and return inovements of the drill can be effected by hand.

When the power feed is employed, the return .movement of the` drillspindle is effe'cted, by a counterbalancing weight 74 ar- 'ranged within the `hollow standard `1. A

chain extends upwardly from the 'weight justable valve 94,- to thereby regulatev the over a pair `of guidel pulleys 76, and thence downwardly to a horizontal lever 77. The forward end of the lever is pivoted to a collar on the upper end of the spindle sleeve 14, and its inner end is connected by a link 78 to a bracket 7 9 on the upper, inner portion of the head 16. A pin-and-slot connection is preferably providedA between the bracket 79, fand the link 78 'as shown and the chain 75 is connected to the lever 77 by means of a member' 80, which is adjustable along the'lever, being held inthe adjusted positionpby a lscrew 81. B shifting the member 80 upon the lever77,

balancing effect of the weight 74 upon the dr1ll spindle can be adjusted as desired, to

the counter- .I

thereby compensate for drills and tools of i different weight, and so that the-weightwill not serve to return the drill spindle when` the hand-feed is employed. I

When the power-feed is employed, the weight 74 effects the quick return of the drill spindle, and this return vmovement is preferably under controll of .a pneumatic dash'pot or c'ushioningdevice.v "This cushioning device comprises a cylinder 82 mounted in verticslposition upon theupper, .outer portion of the head 16 and a piston 83 in the cylinder having a piston-rod which eX- tends downwardly through openings formed in the head 16. The lower end of the pistonrod is engaged by a tappet` 85, which is ad- .portion or bore 89 formed in the pistonand piston-rod. The piston is providedwith a passageway or port 90 extending therethrough with an upwardly opening check valve 91 in the passage. During thedownward movement of the `ston, the air passes freely through the port 90, sothat the downward movement of thedrill spindle is not v retarded. During the return or upward' movement of the drill spindle and piston 83 effectedlby the weight 74,`the flow of air through the ,port 90 is cut off and the air in the upper end of the cylinder is forced out llonger than the piston 83, establishes communication around the piston s o that the eX- .treme end portion of the'return stroke is quickly effected, and the lower trip pin 65 will properly shift the clutch member to engaged eposition; If desired the 'outlet to the petc'ock 92 may be controlled by an adspeed of the return movement of the 'spindle V slowly through a petcock 92 connected to the It should be noted that the power feed mechanism is shiftable with the head 16 and is properly operative inthe different positions thereof, so that the powerfeed may be' used with dierent kinds of work. 'The l power feed mechanismis simple lnconstruction', will not readily get out of order, andI its adjustment and thechange from power and out of working to hand feed can be readily effected.V It is obvious that numerous changes may be made in the details set forth without departure from the essentials of the invention 'as defined in the claims.

I claim as my invention: I

l. In a drilling machine, the Combination with the drill spindle, spindle-sleeve and. guiding head therefor, of power-operated feed mechanism mounted on said head for effecting the working strokes of said spindle, a controlling clutch for said feed mechanism, a shifter for said clutch and trips on said sleeve for actuating said clutch shifter at the ends of working and return strokes of the spindle, one` of said trips being adjustable to vary the working stroke of the spindle, andthe other trip being shiftable into position, substantiallyr as described.

2. In a drilling machine, the combination with the drill spindle, supporting sleeve therefor and the feed shaft geared to said sleeve, of drive gearing for said shaft, a clutch for throwing said gearing into and out of operation, a shifter for said clutch, an upper stop-collar adjustably mounted on said sleeve, a trip pin for said clutch shifter adj'ustably threaded through said stop-collar, a'lower stop-collar on said sleeve, and a trip pin for said clutch shifter adjustable intoand out fof operative position on said lower stop-collar substantially as described.

ln a drilling machine, the combination with a frame, of a guiding head on lsaid frame, a drill-supporting sleeve vertically guided in 'said head, a drill spindle rotatably mountedin said sleeve, a horizontal feed shaft journaled in said guiding head, a rack on said supporting sleeve, a pinion on said feed shaft engaging said rack, a drive gear loosely mounted on said feed shaft, a clutch on said shaft for connecting said drive gear thereto, a clutch shifter mounted on said guiding head adjacent said sleeve and trips adjustably mounted on said sleeve for actuating said `clutch shifter at the ends of the,

working and return strokes of said sleeve,

t substantially as described.

4. In a drillin machine, the combination with a frame, of a vertically movable support on said frame, a drill spindle rotatably mounted in said support, a feed shaft geared to said support, drive gearing for said shaft, a clutch for throwing said gearing into and out of operation, adjustable trips connected to' said spindle, support for shifting said clutch into andout of operation at the ends of the return and working strokes of said support and said spindle,.,a counter-balance for effecting the return-.stroke of said support and said spindle and a dashpot controlling the speed of the return vmovement of said parts, substantially as described.

5. In a drilling machine, `the combination with a frame, ofa vertically shiftable support on said frame, a drill spindle rotatably mounted in said support, a feed shaft journaled in said frame and geared tosaid support, drive gearing for said shaft, a clutch f 6. In a drilling machine, the combination with a frame, of a drill spindle, a supporting. spindle sleeve, an adjustable guiding head for said sleeve, feed mechanism for said spindle mounted'on said head, means for actuating' said feed mechanism in' dif-y ferent adjusted positions of said head, a clutch mounted on said head and controlling saidk feed mechanism, an adjustable trip connected t0 said sleeve for automatically disengaging said clutch at the end of a working stroke ofthe sleeve and spindle, and a counterbalance connected to said sleeve and arranged /to automatically effect the return stroke of the spindle when said clutch is disengaged by said trip, substantially as described.

7. fn a drilling machine, the combination with a frame, of a drill spindlefa supporting spindle sleeve, an adjustable guiding head for said sleeve, feed mechanism for said spindle-mounted on said head, means for actuating said feed mechanism in different adjusted positions of said head, a clutch mounted on said head and controlling said feed mechanism, an adjustable trip connected to said sleeve for automatically disengaging said clutch vat the end of the working stroke of the sleeve and.4v drill spindle, a counterbalance connected to said sleeve and arranged to automaticallyeffect the return stroke of the sleeve and spindle, and means for adjusting the leverage of said counterbalance, substantially as described.

8. fn a .drilling machine, the combination with the drill spindle, supporting sleeve therefor and the feed rshaft geared to said sleeve, of drive gearing for said shaft, a clutch for throwing said gearing into and out of operation,. upper and lower trips mounted on said sleeve for moving said clutch into and out of o erative position, a counter-balance for e ecting the return stroke of the spindle, and a dash-pot for retarding the return movement of the spindle, substantially as described,

9. ln a drilling machine, the combination with the drill spindle, supporting 7sleeve therefor, and the feed shaft geared to said sleeve, of drive gearing for said shaft, a clutch for throwing said gearing into and.

out of operation, upper and lower trips mounted on said sleeve for moving said clutch into and out of operative position, a counter-balance for 'effecting' the return stroke of said sleeve and'spi'ndle, and a dashpot for retarding the return stroke of said parts having means for accelerating the movement of saidl sleeve and spindle at the end of the return stroke, substantially as described. 4

10. In a drilling machine, the Jcombination with the drill spindle, vthe supporting spindle sleeve, and theadjustable guiding head, of a feed shaft journaled on said headA and lgeared to said spindle, drive gearing for said shaft mounted on said head, a clutch controlling said gearing, and lower and upper trips on said lsleeve for shifting said clutch into and out of operation, said upper trip being adjustable to vary the Working stroke of the spindle, and said lower trip being adjustable into and out of |operative position, substantially as described. j 11. In a drilling machine, the combinatien withvthe frame, of a drill .spindle a supporting spindle sleeve, an adjustable guiding head for said sleeve, a feed shaft journaled on, said head and geared to said spindle, drive' gearing for said shaft mounted n said head, a clutch controlling said gearing, lower and upperv trips adjustably mounted on. said sleeve for shifting said clutch into and out of operation, driving connections between said spindle and sai gearing, and means for operatin said feed shaft by hand, substantially as ascribed l2. In, a drilling machine, the combinai tion with the drillspindle, the supporting 'spindle sleeve, and the adjustable '.g-uidin head, of ay feed shaft journaled on said hea and geared to said spindledrive gearing for said shaft mounted on said head, aclutch controlling said gearing, an upper stop-collar on said sleeve, a tri pin for disengaginglgfv said clutch adjustably t readed through said stop` collar, a lower stop-collar,` and a trip pin for engaging said clutch mounted on said lower *stop-collar' and shiftable into and out of operative position, substantially as described.

13. In a drilling machine, the combination with the frame, of a drill spindle a supporting spindle sleeve, an adjustable guiding head for said sleeve, a feed shaft -journaled on said head and geared to said spindle, drive gearing for said shaft `mounted onl said head, a clutch controllin said gearing, a 'shifter vfor said clutch p1voted on said head, upper and lower tri s on said sleeve for moving said clutch shi ter -in opposite directions, a handle for ymanually moving said clutch shifter, (a handle for manually actuating said feed shaft, and

` `driving connections between said gearing and said spindle, substantially as described.

14. In a drilling machine, the combination with rthe frame, of a drill spindle, a supporting spindle sleeve, an adjustable guiding headfor said sleeve, a feed shaft journaled on-said head and geared to said spindle, drive gearing for said shaft mounted on said head, a clutch controlling said gearing, upper and lower trips on said sleeve for ,automatically-- shifting said clutchinto and ,out of operation, means for manually shifting'said clutch, and means for manuallyf'actuating said feed shaft independently of said gearing.

15. In-a drilling machine, the combination with the drill spindle, the lsupporting spindle sleeve, and the adjustable guiding` head, of a,v feed shaft journaled on said head and geared to said spindle, drive gearing for said shaft mounted on said head, a clutch controlling said gearing, means lfor shifting said clutch int and out of opera-tion, `"a handle loosely mounted `on said feed shaft, and means for connecting and disconnecting said .handle andv said feed shaft, 'substanconnected to said sleeve for automatically effecting the return stroke-of said sleeve and spindle, and a dashpot for retarding the return movement of said parts, substantially as described.

17. In a drilling machine, the combination with` a frame, of a drill spindle, a supporting spindle sleeve, an adjustable guiding head forl said sleeve, feed mechanism 'for said spindle mounted on said head, means for 'actuating said feed mechanism in different adjusted positions of said head, a clutch mountedL on said head and controlling said feed mechanism, upper and lower adjustable trips connected tov said sleevev for automatically engaging and disengaging said clutch at the ends of .the working stroke of said spindle, -and v'a counterbalance connected to saidl sleeve for automatically effecting the return stroke of thesleeve and spindle when said clutch is disengaged, substantiallj7 ,as ,i

,described 18. In a .drilling machine, the combination with a frame, of a drill spindle', a supporting spindle sleeve, an adjustable guiding adjusted positions of said head, Via clutch mounted on said head and controlling said feed mechanism, upper and. lower adjustable trips connectedto said spindle for automatias described;

cally engaging and disengaging said clutch4 at the ends of the working stroke of said spindle, a counterbalancel connected to said sleeve for automatically effecting the return stroke of the sleeve and spindl,and a dashpot for checking the return movement of said parts, substantially as described.-

v 19. In a drilling machine, the combination with the drill spindle, supporting spindle sleeve, and the adjustable guiding head, of a feed shaft journaled on said head and geared to said spindle,` drivegearing for said-shaft mounted on said head, a clutch vcontrolling 'said gearing, lower and upper trips on said sleeve for automatically shiftingy said clutch into and out of operation, said upper trip being adjustab e to vary the working stroke of `said spin le, and Said lower trip being adjustable into and out of operative position, -means` for manually rShifting said clutch,.means adjustable into and out of operative condition for manually y actuating said feed shaft, and driving Iconnections between said spindle and said gearing, substantially as described. j l

20.' In a drilling machine, the combin tion with the drill spindle, the supporting Y, pin-g dle sleeve, and the adjustablel guiding nead,

of a feed shaft journaled on said headand controlling said gearing, upper and lower trips on said sleeve for automatically shifting said cllitch, a counter-balance connected to said sleeve for automatically effecting the return stroke of said` spindle, a dash-pot.

mounted on said head for retarding the return movement of said parts, substantially 22. In a drilling machine, the combination with a frame, ofI a drill spindle, asupporting spindle sleeve, a vertically adjustable guiding head for said sleeve, clutch controlled feed. mechanism mounted on said head and geared to said sleeve, a vertical countershaft for actuating said feed mechanism extending'between the upper .portion of said frame and said guiding head, and

variable speed driving mechanism connect-y ing the upper ends of said countershaft and said drill spindle.

23. In a drilling machine, the lcombination with the drill spindle, spindle sleeve, and an adjustable guiding head, of fa horizontal closing said worm and worm wheel, and

driving connections .betweenl said spindle andsaid vertical counter-shaft, substantially as described.

24. In a drilling machine, the .combination with-thedrill spindle, spindle sleeve,

and guiding head, of a horizontal feed shaft journaled in saidY head` and geared to lsaid sleeve, a drive gear looselyI mounted on'said feed shaft, actuating' connections between said gear and said spindle, a shiftable clutch member `on said feed lshaft for 'connecting said drive gear thereto, a clutchy shifter pivoted on saidvhead and provided `with an .inclinedlcam. lug, and upper and lower'tr'ip pins adjustably mounted on said slegve and arranged to engage sai inclined cam lug to -move said clutch shift r in opposite directions, substantially as escribed.

25. In a drilling machine, the combination with the drill spindle,vspindle sleeve, and

`guiding head, of a horizontal-feed shaft journaled in said head and geared to said sleeve, a drive gear loosely mounted on one end of said feed shaft, operating handle bars loosely mounted on the opposite end thereof, a shiftable'clutch member on said shaft for connecting said drive gear thereto, an adjustable clutch pin for connecting said handle bars to said shaft, a shifter for said clutch member `pivoted Von saidhead and prdvided with an. inclined cam lug and a forwardly yprojecting handle, upper and lower stop-collars on said sleeve, and adjustable trip pins on said collars arranged to engage Said cam lug to move said clutch shifter in opposite directions, substantially as described.

' JOHN G. HEY.

Witnesses: f

A. R. CRosMAN,

J. G. ANDERSON.

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