US465892A

US465892A - Feed connection for drill-presses and other machines

Info

Publication number: US465892A
Authority: US
Publication date: 1891-12-29
Anticipated expiration: 1908-12-29

Description

( 3Sheets-Sheefi 1.

T. L. SMITH. v FEED CONNECTION FOR DRILL PRESSES AND OTHER MAGHINBS.

Patented Dec. 29, 1891.

ii; i

(No Model.) 3 SheetsSheet 2.

T. L. SMITH. FEED CONNECTION FOR DRILLYPRESSES AND OTHER MACHINES.

No. 465,892. Patented Dec. 29, 1891'.

(No Model.) I 3 Sheets-Sheet 3.

T. L SMITH. I FEED CONNECTION FOR DRILL PRES'SES AND OTHER MACHINES. No. 465,892. Patented Dec. 29,1891.

THOMAS L. SMITH, OF MI'LlVAUKEE, \VISCONSIN.

FEED CONNECTION FOR DRlLL-PRESSES AND OTHER MACHINES.

$PECIFICATION forming part of Letters Batent No. 465,892, dated December 29, 1891.

Application filed June 3, 1891.

Serial No. 394,916, (No model.)

T0 (0% whom it may concern.-

Milwaukee, in the county of Milwaukee and State of. Wisconsin, have invented certain new and useful Improvements in Feed Oon-' nections for Drill -Presses and other Ma chines; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

The main objects of my invention are to facilitate the operation of the tool by automatically connecting and disconnecting the power-feed by the same movements of the hand-feed required to move the tool up to the work and withdraw the same therefrom, to expeditiously and by simple manipulations move the tool up to the work and to withdraw the same therefrom, to permit of the employment of either hand or power feed in the ordinary manner, and by simple manipulations to bring into operation or disconnect either the power or the hand feed, 85c.

It consists of certain peculiarities of construction and arrangement, particularly in the hand and power feed connections, hereinafter specifically set forth, and pointed out in the claims.

In the accompanying drawings like letters and figures designate the same parts in the several figures.

Figure 1 is anclevation of the drill-spindle and a vertical axial section of the power and hand feed connections embodying my improvements. Fig. 2 is a cross-section on the line 2 2, Fig. 1, showing the clutch, worm,and worm-gear of the power-feed in side elevation. Fig. 3 is a perspective view, on a reduced scale, of a portion of a drill-press, showing the construction and arrangement of parts embodying my improvements as adapted to a vertical drill. Fig. l is an axial section of a modification of the power and hand feed connections shown in Fig. i. Fig. 5 is a developed view of the cams employed in connection with the hand-wheel and clutch shown in Figs. 1 and 4-. Fig. 6 is an axial section of still another modification of the power and hand feed connectionsof the drill, and Fig. 7 is a detached side elevation of the clutch-spindle employed in the construction illustrated in Fig. 6.

A represents the drill-spindle; B, a rack formed on a sleeve mounted upon said spindle or otherwise connected therewith, so as to afford means for imparting a longitudinal movement to the drill, both of the usual or any suitable construction and arrangement.

0 is the clutch and hand-wheel shaft or spindle, preferably arranged at right angles pinion D, engaging with the rack B.

E represents a part of a friction -clutch loosely mounted upon the shaft G and formed or provided with a Worm-gear e, which is engaged and driven by the worm N, mounted on a shaft arranged transversely to the clutchshaft 0 and in turn geared with and driven by a shaft P, as shown in Fig. The wormshaft is provided at the end nearest the op erator with a hand-wheel O, by which a slow hand-feed is provided. The several parts hereinbefore mentioned may be such as are ordinarily employed in machines of this class.

The female section of the clutch E, with its worm-gear e, is restrained from endwise movement on the clutch-shaft O by a collar e in the usual manner.

shaft 0 so as to permit of its free lateral movement thereon into and out of engagement with the clutch-section E, but so as to cause it to turn with the clutch-shaft.

G represents a hand-wheel similar to those heretofore employed for a quick hand-feed and withdrawal or return movement of the drill. It is loosely mounted upon the outer end of the clutch-shaft 0 next to the .outwardly-projecting hub of the male portion F of the clutch. The adjacent ends of the hubs of the clutch-section F and hand-wheel Gare formed or provided with annular cam and clutch formations fand g, a developed exterior view of which is shown in Fig. 5. The hand wheel is loosely mounted upon the clutch-shaft, and is retained thereon by nuts H and 71, the former being provided for the purpose of locking the clutch-sections E and to the drill-spindle A and provided with a F represents the male section of the clutch, V which is feathered or keyed upon the clutch- F in engagement and the latter for the purpose of retaining said lock-nut and the handwheel in place upon the clutch-shat t.

The end of the shaft 0 upon which the handwheel G is mounted is formed with an axial bore, in which is inserted a longitudinallymovable rod K, having a screw thread at its outer projecting end and provided at its inner end with a cross pin or key 7:, which passes through a transverse slot in shaft'O and engages with perforations formed for the purpose in the hub of section F of the clutch. A nut 7r is provided on the projecting threaded end of the rod K, so as to abut against the end of the shaft 0 and afford means for holding section F out of engagement with section E of the clutch whenever it is desired to permanently disconnect the power-feed and employ the quick hand-feed.

A spiral spring L, interposed between the laterally-movable section F of the clutch and an adjusting-nut M, screw-threaded on the clutch-shaft 0, tends to force and hold the clutch-sections out of engagement with each other. The nut M is formed or provided on its periphery with radial projections or arms m, which are accessible through apertures f in the clutch-section F and afford means of turning said nut for the adjustment of the tension of spring L.

The cams f and g are formed with corresponding steep or sharp inclines, as at 3, and with inclines of less pitch, as at 4, and with square or abrupt engaging projections, as at 5 in Fig. 5, which shows the cams in the position they assume when no resistance is encountered by the drill. In moving the drill toward the work the hand-wheel and cam g are turned in the direction indicated by the arrow, Fig. 5. The inclines 3, made of such pitch as to overcome the resistance to the longitudinal movement of the drill-spindle when the drill is not in engagement with the work, acting through the hub of the clutchsection F, turn the spindle and the clutchshaft 0, on which it is feathered or keyed, and through the pinion D and rack 13 move the drill-spindle toward the work. As soon as the drill encounters the work the resistance to the further advance movement of the drill-spindle presented thereby temporarily arrests the clntch'shaft and the cam f, and the continued movement of the hand-wheel G in the same direction causes the sharp incline 3 on the cam g to ride over the corresponding incline on the camf. The inclines 4 on said cams are thus brought into engagement and force and hold the clutch-section F in engagement with the clutch-section E, thereby automatically connecting the clutchshaft 0 with the power-feed through the wormgear 6 and worm N. \V hen the hand-wheel G is turned in the opposite direction, the inclines 4 of cam g are moved out of engagement with the corresponding inclines of cam f, thereby automatically releasing the clutchsection F and allowing it to be moved out of connect the power-feed, by means of the nut H. Whenever it is desired to disconnect the power-feed and employ a quick hand-feed, the clutch-sections may be held out of engagement by turning up the nut on the rod K, so as to lock the cams f andg in engagement in the position in which they are shown in Fig. 5, whereby the hand-wheel is made fast upon the clutch-shaft.

'By means of the nut M the tension of the spring L is so adjusted as to offer sulficient resistance to the independent advance movement of the hand-wheel to cause the same to advance the drill-spindle without throwing the clutch-section F into engagement with the clutch-section E before the drill encounters the work.

Various changes in the details of construction and arrangement of the parts embodying my improvements and of the parts of the drill-press associated therewith may be made within the intended scope of my invention.

Referring to Fig. 4, which illustrates one of many such possible modifications, the tension of the spring L is adjusted by means of a rod M, inserted in an axial bore in the clutch-shaft C and provided at its inner end with a crosspin projecting through a transverse slot in the clutch-shaft and affording bearings for the inner end of spring L and at its outer end with an adjusting-nut m, which abuts against the outer end of the clutch-shaft. By turning the nut m up more or less the tension of spring L is adjusted as desired. This device for adjusting the tension of the spring is similar to the device shown in Fig. 1 for holding the clutchsections out of engagement, which is accomplished in the modification shown in Fig. at by means of a sleeve K, threaded upon the hub of the clutch-section F and formed at its opposite end with an inwardly turned flange, which is adapted to engage with an outwardly-turned flange g on the cam g or hub of the hand-wheel G. This sleeve is preferably milled or knurled on the outside to facilitate turning the same by hand. When it is desired to lock the clutch-section F out of engagement with the driving-section E, the sleeve K is turned so as to bring the flange on its outer end into engagement with the flange g, and thus draw and hold the camf 1 0 By this means the hand-wheel G is made fast upon the clutch-shaft and may be employed to feed and withdraw the drillby hand without the power-feed and the automatic engagement by which it is brought into operation.

Referring to Fig. 6, illustrating still an- I other modification of which the device is susceptible, the hand-wheel G is screw-threaded upon the clutch-shaft C, and a key T, passing through a transverse slot in the clutchshaft, projects at the ends between the hub of section F of the clutch and the hub of the hand-wheel. Instead of the spring L (shown in Figs. 1 and 4) and the various means of adj usting its tension to afford a variable resistance to the independent advance movement of the hand-wheel on the clutch-shaft, ayielding ring S, provided with inclined and square projections s s, is employed next to the outer end of the hub of the hand-wheel, which is provided with corresponding inclines g The ring S is prevented from turning upon the clutch-shaft by a spline or feather, but is capable of a limited movement endwise of said shaft. A spring Q, interposed between the outer face of said ring and a nut R, threaded on the outer end of the clutch-shaft, holds the inclined projections s normally in engagement with the corresponding projec-- tions g on the hub of the hand-wheel. This nut R is preferably formed or provided with a cylindrical housing 7', which projects over and incloses the ,spring Q and ring S. By means of the nut R the tension of spring Q may be adjusted so as to afford the desired resistance to the independent advance movement of the hand-wheel G, by which the clutch-sections are automatically brought into engagement when the drill encounters the work. i is a rod inserted in an axial bore in the outer end of the clutch-shaft G, being screw-threaded therein and provided at its projecting end with a head or thumb-piece 25. By turning this screw-rod into the clutchshaft it engages at its inner end with the key T, and through it forces and holds the clutchseetion F in engagement with the clutch-section E.

This last-described modification of my invention operates as follows: When the hand- Wheel G is turned in the direction to carry the drill-spindle toward the work, the inclined projections g on its hub, engaging with the corresponding inclined projections s on the yielding ring S, operate through the parts named to turn the clutch-shaft O',and through it to feed the drill up to the work. WVhen the drill engages the work, the clutch-shaft is temporarily arrested, the inclines 9 are forced past the inclines s, and the hand-wheel, being thus relieved of their resistance to its inde-- pendent movement on the clutch-shaft, turns upon the threaded portion thereof and automatically carries the clutch-section F into engagement with the driver E, and thus holds the power-feed in gear. hen the hand wheel G is turned in the reverse direction,it

recedes on the screw-threaded portion'of the clutch-shaft, allowing the clutch-section F to be moved by the spring L out of engagement with the driving-section E. The inclined projections g returning to their position in engagement with the corresponding inclines s on the yielding ring S, engage by their backs the square projections s on said yielding ring, and through them cause the clutch-shaft C to turn with the hand-wheel, thereby withdrawing the drill from the work.

It will be observed that in the several modifications of my invention herein shown and described a hand-wheel or its obvious equivalent, a pilot-wheel, crank, or arm having'a limited movement independent of the clutchshaft and a yielding resistance to such movement sufficient to enable the hand-wheel to feed the drill up to the work without throwing the clutch into engagement and bringing the power-feed into operation are employed. These being essential distinguishing features ofmy invention, I desire to cover the same broadly herein, and do not wish to be understood as limiting myself to either of the constructions shown and described.

I have for convenience shown and described my improvements in' connection with a drillpress; but they are applicable to other ma- ICO 1. In a drill-press or other machine, the combination, with a longitudinally-movable toolspindle and power-feed, of a clutch for connecting thesame,andahand-wheelorits equivalent mounted upon and having a limited movement independently of the clutch-shaft, by which movement the clutch is automatically engaged and disengaged, substantially as and for the purposes set forth;

2. In a drill-press or other machine, the combination, with a longitudinally movable toolspindle and power-feed,of a clutch for connecting the same and a hand-wheel or its equivalent mounted upon and having a limited movement independently of the clutch-shaft, by which movement the clutch is automatically engaged and disengaged, and resistance opposed to the independent movement of the hand-wheel sufficient to enable it to advance the tool-spindle without engaging the clutch until the tool encounters the work, substantially as and for the purposes set forth.

3. In a drill-press orother machine, the com-- bination, with a longitudinally-movable toolspindle and power-feed, of a clutch-shaft connecting the same and a hand-wheel mounted upon and having a limited movement inde pendent of. the clutch-shaft, by which move ment the clutch is automatically engaged and disengaged, and variable resistance opposed to the independent movement of the hand-wheel suflicient to enable it to advance the toolspindle without engaging the clutch until the tool encounters the work, substantially as and for the purposes set forth.

4. In a drill-press or other machine, the combination, with a longitudinally-movable toolspindle and power-feed, of a clutch for connecting the same, a hand-wheel or its equiva lent mounted upon and capable of turning a limited distance independently of the clutchshaft, whereby the clutch is automatically en-v gaged and disengaged, and inclines by which the independent advance movement of the hand-wheel is opposed sufficiently to hold the clutch out of engagement until the tool encounters the work, substantially as and for the purposes set forth.

5. In adrill-press or other machine, the combination, with a longitudinally-movable toolspindle and power-feed, of a clutch for conneeting and disconnecting the same, comprising a driving-section loosely mounted upon the clutch-shaft and a section movable into and out of engagement therewith and feathered upon the clutch-shaft, a hand-wheel or its equivalent loosely mounted upon the clutch-shaft and capable of turning a limited distance independently thereof, and inclines in connection with the hand-wheel and driven section of the clutch, arranged to engage with each other and oppose the independent ad vance movement of the hand-wheel sutlicien tly to prevent the engagement of the clutch when the tool does not engage the work, substantially as and for the purposes set forth.

6. In a drill-press or other machine, the combination, with a longitudinally-movable toolspindleand power-feed, of a clutch for connecting the same, comprising a driving-seetion loosely mounted upon the clutch-shaft and a driven section feathered upon the clutch-shaft and movable into and out of engagement with the driving section, a spring tending to carry the driven out of engagement with the driving section of the clutch, a hand-wheel or its equivalent loosely mounted upon the clutch-shaft and capable of turning a limited distance thereon, and opposing inclines in connection with the hand-wheel and the dri vcn section of the clutch, whereby suflicient resistance is afforded to the independent advance movement of the hand-wheel to hold the clutch out of engagement until the tool encounters the work, substantially as and for the purposes set forth.

7. In a drill-press or other machine, the combination, with the tool-spindle and power-feed, ot' a clutch for connecting and disconnecting the same, comprising a driving-section loosely mounted upon the clutch-shaft and a driven section with which the clutch shaft turns, movable into and out of engagement with the driving-section, a hand-Wheel or its equivalent mounted upon and capable of turning a shaft, and a spring acting in opposition to the independent advance movement of the handwheel, substantially as and for the purposes set forth.

8. In a drill-press or other machine, the combination,with the tool-spindle and power-feed,

of a clutch for connecting and disconnecting the same, comprising a driving-section loosely mounted on the clutch-shaft, a driven section with which the clutch-shaft turns, movable into and outof engagement with the drivingbination, with the drill-spindle and power- I feed, of a clutch for connecting and disconnecting the same, a hand-wheel or its eqnivalent mounted upon the clutch-shaft and capable of turning a limited distance independent-1y thereof, whereby the clutch is automatically engaged and disengaged so as to connect and disconnect the power-feed, and independent means of locking the clutch in engagement, substantially as and for the purposes set forth.

10. In a drill-press or other machine, the combination, with a drill-spindle and powerfeed, of a clutch for connecting and disconnecting the same, a hand-wheel or its equivalent capable of turning a limited distance independently of the clutch-shaft, whereby the clutch is automatically engaged and disengaged, so as to connect and disconnect the power-feed, and means of locking the handwheel upon the clutch-shaft so as to prevent its independent movement, substantially as and for the purposes set forth.

11. In a drill-press or other machine, the combination, with a tool-holder movable toward and from the work, of a power-feed and means for connecting and disconnecting the same with the tool-holder, a hand-feed having a limited movement independently of the tool-holder, andan incline opposing the independent advance movement of the hand-feed and holding the power-feed out of operation until the tool encounters the work, substantially as and for the purposes set forth.

12. In a drill-press or other machine, the combination, with a tool-holder movable toward and from the work, of a power-feed and means for connecting and disconnecting the same with the tool-holder, a hand-feed having a limited movement independently limited distance independently of the clutchi of the tool-holder, and inclines of diiferent IOO ICS

IIO

pitch, the more obtuse opposing the independent advance movement of the hand-feed and In testimony that I claim the foregoing as my own I affix my signature in presence of IO two Witnesses.

THOMAS L. SMITH.

Witnesses:

CHAS. L. Goss, E. G. ASMUS.