US2176572A - Power driven tool - Google Patents

Description

0d 17, 1939- T. L. HEDGPETH l I 2,176,572'

POWER DRIVEN TOOL V )I il', r .IIIH H- Term Mgg/'ve l 0d. 17, 1939. 1.. HEDGPETH l 2,116,572

POWER DRIVEN TOOL Filed July 19, V'19.37' 5 Sheets-Sheet 2 AOt- 17, l939 T. L.. HEDGPETH 2,176,572

POWER DRIVEN TOOL Filed July 19, 1957 5 sheds-sheet 4 T. L. HEDGPETH POWER DRIVEN TOOL Filed July 19, 1937 Get. 17, 1939.

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Patented ou. 11, 1939 UNITED s 'rA'rEs PATENT oFFlcE 2,176,572 POWER DRIVEN TOOL The Duro Metal'lrodncts ron i.. neagpetn, oak

Park, Ill., assignor to I Company, Chicago, lll., a

corporation o! Illinois Application July 19,

4 Claims.

power driven tools, therefor.

i5 ported overhead always available for With the advent of for home'workshops,

that purpose.

etc., expensive millwrighting and auxiliary power transmitters were out of the question. Power tools had'to be provided which could be operatedwithout benet of conventional millwrighting and single power unit because supplying units with each tool entailed extra cost and great sales resistance. Inraddition to this, power tool constructions and their operation plifled and rendered readily understandable so that they could be used by those who had little, if any, technical experience, and `as a corollary to this proposition, the single power unit supplied had to b e thoroughly effective tinkering and quickly available for all driven thereby. Y

Consequently, one of the objects of the present invention is to provide improved power tool equipment for home workshops or the like.

Another object oi the invention is to provide lan improveddrive for power tools.

Another object of the invention is to provide an improved belt take-up for power drives.

Another object of the invention a motor mounting affording an improved belt take-up for power drives. Another object of the invention is to provide a combined motor mounting` and belt take-up ab fording effective torque drives in a plurality of angularly disposed torque planes.

Another object of the invention is .to provide a motor mounting affordingautomatic drive takedisposed directhe tools ups in a plurality of angularly tions. Another object of the invention'- is to provide -a combined motor mounting end beit take-up capable of driving a plurality of variously posiindividualized power tools u without 4is to provide 1937, Serial No.- 154,342

(ci. 'I4-211) tioned tools vices.

- other object oi the invention is to provide mounting permitting rapid multi-speed drives. Another object of the invention is to provide motor mounting and drive which is simple in construction and operation, eiective in A use, and inexpensive to manufacture and maintain. 1 10 These being among the objects of the invenwill become apwithout auxiliary transmission de- Fig. l is a side elevation trating an embodiment of the invention;

Fig. 2 is an enlarged side elevation of th portion of the drill press shown in Fig. l;

Fig. 3 is a top plan view of the head portion shown in Fig. 2;

Fig. 4 is an enlarged section taken on -Ji oi Fig. 2;

Fig. 5 is an 5-5 of Fig. 4;

Fig. 6 is an enlarged section taken on the line f Fig. 2:

Fig. 'l is a side elevation similar to Fig. 2 showing the operation of the motor mounting oi invention;

de elevation similar to Fig. 2 show- Fig. 8 is a si ing use of the motor mounting in another relation;

Figs. 9 and 10 are reduced views similar to 35 Fig. 2 illustrating other driving relationships of the motor and a driven member;

Fig. 11 is an enlarged view illustrating another application of the motor mounting; and Fig. 12 is an enlarged section taken on i2--i2 of Fig. 1l.

Referring now to the drawings in further de-` bodiment of .the invention tail, the preferred em Y illustrated will be better comprehended when it is understood, generally, that the motor otally mounted onA an adlustable support pivot pin I4 for movement about an a parallel to the torque planes of the drive pulleys i6 and i8 d on the shaft 30 'of the motor Iii, and

driven pulleys 20 and 22 (see Fig. 8) located 50 on the driven shaits'li and 26 respectively. The location of the pivot pin il and the axis of rotation determined thereby is preferably at a point spaced from, not only the torque planes mentioned, but also ular to the 55 the line enlarged section taken on the line 25 the line 4o a plane perpendic the shaft 30 at the center of gravity of the motor I Il. through the intermedlatelmember 60 in a direc- The pivot pin Il in turn may be mounted for tion perpendicular to the groove 'IIL Telescopng bodily movement in three directions, all parallel in the boresn76 are two correspondingly parallel ployed and illustrated for accomplishing the above movement around and along the standard 32 by 10 or table 31 in a manner preventing a toppling of the motor I 8 is mounted for pivotal movement to 15 the standard 32 under the weight of the motor serve` in various capacities to be described, it will I4, drill head 28, the tiltable work table 38, and be observed that the motor III is directly mounted the workloads carried thereby. on a base plate 82 by means of nut and bolt The drill head 28 rotatably supports the driven assemblies 86 extending through a\ plurality of 2o pulley 20 by means of a sleeve 40 journalled in slots 84 in the plate 82 and through 'suitable Open- 20 the head' 28 as at 82 which slidably receives in ings in the base 88 oi the motor QI 0 which'vcoindriving relationship the shaft 24 therethrough for Gide With the $10115 34 The bas plate 82` and l the shaft 24 which in turn is fed relative to the each other by means of the 7pin I4 traversing 25 work table by means of a quill 46 reeiprocated by intermeshed, @axially-bored portions 90 carried 25 the manual feed handle I8 in a conventional manby the base plate 82 and the support I2. The supner. port I2 is disposed preferably in a vertical plane.

Primary adjustment ofthe drill head 28 rela- 'I'he base plate 82 and motor` III, carried on the tive to the work table 38 is. accomplished by outside thereof, move arcuately away from the 80 means of a bore 50 in the drill head 28 which telesupport I 2 and upwardly. Downward movement 3o 85 a way establishing a clamping relation at the In this connection, it has already been pointed 35 bore 58 for xing the drill head 28 on the standx out that the location of the pivotal axis oi' the able. The other` direction o1' movement permits arcs of travel 'of the motor I8 as it approaches its tension adjustments for the belt 56 at the diilerresting position against the `set screw 92. ent pulley speeds and-also for a. purpose to be Consequently, an improved Speed' changer and hereinafter further described. belt take-up is provided' wherein a moving of the 55 'Ihe mounting of the motor III for the above motor upwardly past ,the pivot pin I4 creates a 28, extending parallel with the standard 32, and motoris magnined to a desirable anda practically having a wide bottomed slot 84 throughout its unyielding degree. l' length for the reception of the head 68 ofa clamp In event the four direct 'speed ratios, prof 65 lt and nut assembly 68 (see Fig. 6). The groove vided by the pulleys I8 and 28, are not enough, l 18, mating with the guide 82, is a part o1' the init has been pointed out that other speed ratios 7Q guide 82 to maintain the predetermined augment suillcient widths of the several steps of the pulleys 'I0 lish the clamping relation desired.' belt 56 tension can be taken up by the -rods 'I8 'I'he bore and shaft construction mentioned in the bores 18 through loosening and tightening above comprises two parallel bores 'I6 extending the winged lock bolt 88, and a closer adjustment '1li' made by adjusting the set screw s2. This it possible to have readily at hand a great many more speed ratiosin a very simple way, whereby a greater flexibility or adaptability for power drives isprovided than would otherwise be possible.

So far, the description been related to the improved mounting and its relation to a drill press. In addition to this, the motor it, through this improved mounting, made available for use in many other ways for driving other machinery. For instance, refer to Fig. 8, where the standard 32 is shown set necessary,

where the torque plane of the pulley 22 coincides with the torque plane of one of the steps in pulley it when the motor is raised toits horizontal position as shown. The driving relation with the drill pulley 2li automatically becomes inoperative 5t, then the belt supports the motor it and the weight or the motor lo serves to maintain automatically the necessary tension on the belt Sie.

Although one particular application of the motor mounting in its horizontal position is shown., it will be appreciated that the motor mounting can be rotated around the standard 32 to take care of the other driven shafts and pulleys which may be placed where they will overhang other edges of the table` adjacent the standard 32. Hereby, the motor can be used as a source power for many other power tools, and the loelt tension maintained automatically or all of them with a very simple adjustment. Referring now to Figs. ll and l2, another application of the invention is shown wherein 'the vertical positions of 'the drill head 2li and the wort; table tt are reversed and the drill head 23 inverted with the quill dt thereof locked in such a position that the chu l;

Shaper tonie@ above the face of the work table 3d. In this event, the motor base plate is held against the stop or loci; screw by an Lshaped bolt it@ engaging a positioning onset im in the plate 82. The bolt iii@ emends through a hole itil on the support ill where it is tensionally engaged terminally by a winged nut and washer assembly itt creating a securement for the plate W2 sucient to support the `motor lil rigidly Aagainst gravity and the tension y and drive eiect of the belt he.

Consequently, in addition tothe advantages outlined for a faster speed ratio change and the leverage effect on the belt, the present motor mounting makes it possible to utilize the motor for driving pulleys having a variety of angularly disposed torque planes in a manner thoroughly expedient and eective without aumliary shaft` ing, belt taire-ups,- or the like, and all necessary belt take-ups are automatic for all the driving relationships available with thefmounting and all adjustments are so constructed and arranged that operators without technical Iexperience can operate the tools quite expeditiously. Although a preferredy embodiment of the invention and several. applications thereof have been shown 'and described herein, it will be ap- @d which has parent to those skilled in the art that various modications, changes, and further applications may be made without departing from the spirit and substance the scope of which is commensurate with the appended claims.

'What I claim as new and desire to secure by letters Patent of the' United States is:

l. in a motor driven tool, the combination of a column of substantially uniform cross section, with a tool body comprising a member having a split collar embracing said column, threaded means for drawing said collar into clamping engagement with said column, bearing means carried by said member, a tool shalt rotatably mounted in said bearing means and having a plurality of' pulleys of difierent diameters, said collar, having a slot in one side thereof, a mounting aperture, a bolt in head in said T slot, guides carried by said collar sliding movement of said plate parallel to said slot, said plate having a pair of transverse guide a crosshead carried by v said guide shafts, said crosshead having a hinge lug, a motor supporting plate having a hinge lug and fixedly secured to a motor, a pintle pivotally connecting said hinge lugs, said motor having a drive shaft with a plurality of pulleys of diierent diameters, and a belt from a motor shaft pulley to a tool shaft pulley, whereby the weight of the motor may tighten the belt and any pulley on the be used with any pulley on the tool shaft, with the tool shaft and motor sha parallel to each other and in any of a multiplicity of angular positions.

2. in a motor driven tool,the4 combination of a tool support comprising a column of substantially uniform cross section, with a tool body comprlsing a member having a split collar embracing said column, threaded means for drawing said clamping engagement with said coliman, means carried by said member, a tool shaft. rotatably mounted in said bearing means and having a plurality of pulleys of different diameters, said collar having a a ertnre, a

and plate for sliding movement of saidplate parallel to said slot, said plate having a pair of transverse guide bores, a pair. of guide shafts in said for clamping one of said guide shafts in fixed position, a cross-head carcrosshead having a hinge lug, a motor supporting plate having a to a motor, a pintle pivotally connecting said hinge lugs, said motor drive shaft with a plurality of pulleys and a belt from a motor whereby the weight of the motor may tighten the trelt and any with any pulley on ith the tool shaft and motor shaft parallel to each other and in any of a multiplicity of angular positions, an means for limiting the pivotal movement of the motorn supporting plate with respect to the crosshead.

3. In a motor driven tool, the combination of a tool support comprising a column of substantially uniform cross section, with a tool body comprising a member having a split collar embracing said column,A threaded means @for drawing said collar into clamping engagement with said colsaid aperture, and having its' 4 2,176,572 umn, bearing means carried by said member, a said olumn. threaded' means tordra. said tool shaft rotatably mounted in said bea collar into clamping engagement with said co1-

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