US1434564A - Drill pkess - Google Patents

Description

A. F'UETSCHI.

DRILL PRESS.

APPLICATION FILED IIIIY 26,19III.

l, Patente@ Nov. 7, 1922.

2 SHEETSSHEET I.

ZI '//Mmw1 E Timm illlllllI-IIII A. RUETSCHI.

DRILL PRESS. v APPLICATION FILED IULY 26, I9l8.

Patented Nov. 7, 1922,.

2 SHEETS-SHEEI 2.

O fr@ #T7-CEMEX@ Patented Nov. 7, 1922.

UNITED STATES ARNOLD RUETSCH, 0F. LAKEWOOD,`OHIO.

mmm. ranss.

Application tiled July 26,.

To all whom t may concern.'

Be it known that ll, ARNOLD RUn'rscHI, aA citizen of the United States, and a resident of` Lakewood, county of Cuyahoga, and State of 0hio, have invented a new and use, ful lmprovement in Drill Presses, of which the following is a specification, the principle of the invention being herein explained and the best mode in which ll have contemplated applying that principle, so as to distinguish it from other inventions.

The resent invention, relating, as indicated, to drill presses, is. particularly con. cerned with improved driving means for such a tool with improvements in the construction and operation of the spindle-carrying parts. One of the objects of the invention is the provision of automatically adjusting means for taking up any play inthe driving members and also lin the provision of an extremely simple means for lowering the spindle-carrying members in their guides. 'llo the accomplishment of the foregoing and related ends, said invention, then, consists of the means hereinafter fully described and particularly pointed out in the claim. l

The annexed drawings and the following description set forth in detail certain mechanism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention may be used.

In said annexed drawings1- Fig. 1 is a view in perspective of the machine embodying'my improvements; Fig. 2 is a longitudinal vert-ical section through the members supporting the intermediate or idler pulley for the driving belt; Fig. 3 is a. vertical transverse sect-ion through the spindle and guides therefor; Fig. a is a similar view, but showing a modification of the operating means; and Fig. 5 is a transverse horizontal section on t-he line 5 5, Figlf 3.

1n Fig. 1 ll have shown a general view of my improved machine constructed as a bench type'of machine with the base platform or support 1, upon which is mounted a vertical frame or supporting member 2. Extending laterally from the supporting member 2 and forwardly over the work table 3 are two spaced arms 4, which are provided at their outer ends with aligned vertical openings 5 therethrough serving as guides for the spindle-operating mechanism. lt is customary in machines of this character to me'. serial no. 24am.

suicting in dis-alignment and in inaccuracy of work. @ne of the impbrtant improve` ments inthe present machine is the provision of rigidly aligned guides through which the spindle-carrying means extend. Byy this method of supporting the spindle-carrying means very considerable bearing surfaces are provided therefor, and the dangerpf the spindle working out of alignment is greatly reduced, while the expense of manufacture is also reduced by the elimination of the expensive guide membersvon the supporting frames 2. I n

A drill spindle 6 is suitably mounted centrally in the guides formed vby the apertures 5 in the arms 4, as will be more fully described hereinafter, this spindle carrying a driving pulley 7 operated by means of a belt 8, which is driven from the driving shaft 9 mounted preferably at the base of the machine. Un the driving shaft 9 are disposed a plurality of pulleys 10, 11 and 12 in order to provide yvarious driving speeds for the spindle 6, and this shaft 9 also carries additional pulleys 13 and 14, one of which is of course the usual idler. A suitable belt shifter 15 is also provided for.shifting a driving belt from the pulley 13 to the pulley 14 when desired. The belt 8 is a continuous belt, passing around whichever one of the pulleys, 10, 11 or 12, it may be desired to use, and then over horizontal intermediate pulleys 16 and 17 which are mounted to bring the two portions of the belt on either side thereof lnto planes at substantially at right angles to each other. As the belt is shifted along the stop pulleys 10, 11 and 12 .it is necessary to provide some compensatlng means for reducing or increasing lthe distance between the driven pulley 7 and whichever one of the pulleys 10, 11 or 12 1s used. For this purpose ll :mount the pulleys 16 and 7 on a shaft 19,' which is carried at the outer end ofthe pivoted supporting arm 20, as may be seen in Fig. 2. This supporting arm 20 is pivoted intermediate its ends in a movable block 21 "and-the outer end yofthe arm 2O is normally forced up- -t'wardly byl means' of a spring 22, lthe tension of which is controlled -byan adjustable bolt 23.'.v The spring 22 and arm 20 serve. to

- maintain a constant and unifornrtension on the belt 8 by the pressure which is exerted'on the pulleys 16and.-17 tending tol` force them s upwardlyjaway from the'. pulleys 10, 11 and 12 andwmaline parallel vto the vertical plane paing through the :The compensation l forl the i' difference in the diameters of the pulleys 10, 11 Aand 12" is secured by the movement .of avblock 21,

which is mounted on a rod or' guide 24 slidably received lin a support v rigidly 2.l Th'e block 21 may attached to the top of the supporting frame be moved toward or away from the driven pulley 7 toin- V'crease or decrease the distance between this pulley and they ulle s 16 and17 by means of. a handled lthrea edl lever 26 operating in a threaded aperture 27, formed in the frame 25 'and provided witha non-rotatable fixed collar 28, which is snugly but rotatably receivedin a recess 29 formed in the block 21. Rotation'` of the member 26 serves to move the block 21, and with it the y arm 20, and the pulleys 16 and 17 toward or away from the pulley 7, depending- 30, to whichis keyed the driving pulley 7.

This sleeve 30 extends a sufficient distance above and below the pulley -7 to vreceive thereon the inner races of a pair of supporting ball bearings 31 and 32, which are suitably mounted in casings 33 and 34 which are snugly, received in the apertures 5 in lthe arms 4. In the-lowermost of the three extension 40 of the casing 36 which is extended sufficiently to .provide anV ample bearing surface for the quill, irrespectlve of its' position. "In the upper and lower endsI ofthe quill are mounted ball bearings 41 and 42 respectively, for frlctionally supportingthe .spindles 6, which at its lower end has a tapered aperture 43 for receiving a chuck for holding a suitable drill or other pulleys 10, 11 or 12 is used tool. `lly'thejuseof threespecial arms `4, v

each of which lisadapted. to receive collarsw.v l s vide a veryf'rigd 'and accurate bearing) theivertically moving spindle 6, and a earing which is not liableto wear even though y the spindle'is run at very high speed.

InFig. 5 I have shown a section through l the operatingl means formoving lthe quill 37 downward to bring the'too'l into engage# ment with `the work, and thisv means com-l prises'the pinion. 39, which isattached to a horizontally extending shaft 45. This shaft 45 is rotatably mounted in a collar 46, which is non-rotatably' engaged in the central ,open- 1 ing or bore 47 through the casing 40.v A t lits other end it is rotatably carried ina second collar 48,'which is fitted snugly into the cas'- I ing 40 and is locked. in any 'desired position by means ofl a set screw 49.f Between `the,V gear 39, which is pinned tothe shaft 45.-', 1

and the collar 48 is receivedv and held` in suitablev socketsfa coiled spring 50. The` springvis wound up to place it under con-.

siderable tension by rotating the collar 48 and then lockingl it by means of the set .v

screw 49.

One outer end of the shaft 45 bears a-suitable handle 51, while the other end 52.0f the Vshaft istapered, and is adapted to receive thereon an `adjusting collar 53, which mayV be locked into position by means of a lock nut in the handle 55. Projecting laterally from the collar 53 is a pin56, while a pin V57 projects into the path of movement f quill and tool to the lowermost point that is desired and the locking collar 54 is then f loosened on the shaft 45 so that the collar 53 may be rotated until the pin 56 engages with the pin 57. The collar 53 and pin 56 are then locked in that position by tightening the lock nut 54. As the handle 51 is released the spring 50 serves to return the shaft 45 to its normal position, thereby again raising the spindle 6 to its original vertical position. Thereafter the handle 51 can be rotatedonly enough to bring the ypin 56 against. the stop 57 which will limit the vertical travel of the spindle. j

y In Fig. 4 I have illustrated the modification of the spindle operating means, adapting the same to be operated by fluid pressure during this downward movement. To secure this action the casing or sleeve 37 is internally threaded at its upper end to receive therein a second' sleeve 60, which is provided at its upper end with a laterally extending lange snugly engaging against the ELA-34.5564

ing ring 6l thereon to render it tight. This posed between a shoulder 68 formed in the casing 36 and the lower surface of the 'lange on the sleeve 60 operates to raise this sleeve and with it the quill 37 andspindle 6 as soonl as the air is discharged from above the piston. Suitable valve mechanism may be provided in the conduit 66 for admitting and discharging air through this conduit, but it is not necessary to illustrate any specific valve construction for 'this purpose.

rl`he features of my improved machine to which I desire to call attention are the provision ot a simple and rigid bearing for the spindle which is not liablefto wear or to inaccuracy, the compensating mechanism for adjusting the machine to thevariations in the effective length of the belt, and the construction and means for operating the spindle and parts connected thereto. These various features have been found to considerably increase the effective vand accurate life of a high speed drill of this type, while an important advantage of these features is that they are not complicated and are no more expensive to manufacture than the usual means vwhich are found in slow speed drills, and

which are not satisfactory for high speed worin The tubular guide isadjustably mountedl vin the trame, ot which the :forwardly extending portion 75 which has the vertical opening 5 therethrough, is split and is capable of adjustment either to grip or free the tubular guide 36 that is held therein. When this split extension 75 is tightened by means of the bolts 76 and handles 77,. the tubular guide 36 is clamped securely therein in any suitable position, but upon loosenin the bolts 76 the guide may be adjusted vertically through a considerable distance.

@ther modes of applying the principle of my invention may be employed instead of the one explained, change being made as re-Y gards the mechanism herein disclosed, provided the means stated by the following claim or the equivalent of such stated means be employed.

l theret'ore particularly point out and distinctly claim as my invention lln a machine of the character described7 the combination oi a frame provided with spaced arms extending therefrom and having alined openingstherethrough, tubular guides mounted in each of said openings, the lowermost of said guides being slidably adjustable, a quill slidably mounted in said adjustable guide, alined and spaced antifriction bearings disposed in said quill and in the upper guides, said quill being normally substantially enclosed in its guide, and a spindle rotatably mounted in said antifriction bearings.

Signed by me, this 20th day of July, 1918.

Annone nnnrscnr.

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