US1461755A - Automatic drill press - Google Patents

Description

July 17, 1923- C. ,E. COX

AUTOMATIC DRILL PRESS 4 She ets-Shee t 1 Filed July 19, 1920 m a m. 5

mamas July 17,1923- 7 C. E. COX

AUTOMATIC DRILL PRES S 4 Sheets-Sheet 2 A TTOH/VEYS I I c E. cpx

AUTOMATIC DRILL PRESS l v Filed July 19', 1920 4 Sheets-Sheet 3 I ATTORNEYS July 17,. 1923- C. E. COX

v AUTOMATIC DRILL PRESS Filed July 19, 1920 4 Sheets-Sheet 4 a1: vgg

ATTORNEYS July 17, 1923.

CHARLES E. COX, OF FREE PORT, ILLINOIS.

AUTOMATIC DRILL PRESS.

Application filed. July 19 7'0 all whom it may concern:

Be it known that I, CHARLES E. Cox, a citizen of the United States, and a resident of Freeport, in the countyof Stephenson and State of Illinois, have invented a new and useful Improvement in 1 Automatic Drill Presses, of which the following is a full, clear, and exact description.

My invention relates to improvements in automatic drill presses, and it consists in the combinations, constructions and arrange-- ments herein described and claimed.

An object of my invention is to provide a device in which there is a novel arrangement for elevating and lowering the drill spindle. A further object of my invent-ion is to provide an automatic drill press having a magazine in which a plurality of tools may be carried with means for bringing any desired tool into operative relation with the drill spindle.

A. further object of my invention is to provide a novel means for locking the tool carrying mechanism in position for releasing it at will.

A further object of my invention is to pro vide a novel means for raising and lowering the work table.

Other objects and advantages will appear in the following specification, and the novel features of the invention will he particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawings, forming part of this application, in which Figure 1 is a side elevation of one form of the device,

Figure 2 is a sectional detail view showing a portion of the spindle shaft and its clutch connections,

Figure 3 is a section along the line 8-3 of Figure 2,

Figure 1 is a side elevation of a modified form of the device,

Figure 5 is a fragmentary view of a portion of the mechanism for raising and lowering the work table shown in Flgure 4,

Figure 6 is a fragmentary sectional view of the portion shown in Figure 5 looking at right angles thereto, 3

Figure 7 is a detail view of a portion of the locking mechanism for the magazine shown in Figure l,

Figure 8 is a detail view of a portion of the mechanism shown in Figure 4,

Figure 9 is a detail view of the clutch 1920. Serial NO. 397,252.

mechanism for raising and lowering the magazine shown in Figure 4:,

Figure 10 1s a sectional detail view of a ing the spindle shaft.

Figure 11 is a plan view of a modified form of magazine,

Figure 12 is a side view of the modified form of the magazine shown in Figure 11,

Figure 13 is a side elevation of another modified form of the device,

Figure 14: is a plan view of a sprocket wheel and a portion of the endless magazine belt shown in Figure l,

Figure 15 is a detail view showing a means for actuating the sprocket wheel shown. in Figure'll,

Figure 16 is a detail view showing a clutch mechanism which forms part of the work table raising means,

' portion of the means for raising and lower- Figure 17 is a sectional view along the line l7-17 of Figure 16,

Figure 18 is a sectional view of the portion of the clutch mechanism shown in Figure 16 at right angles to the latter figure.

Figure 19 1s a top plan view of the magazine as shown in Figure 1.

Figure 20 is a sectional view through a tool-holding sleeve of the magazine, showing the drill spindle in operative connection with the tool-holding chuck,

Figure 21 is a similar view showing the tool-holding chuck as disconnected from the drill spindle,

Figure 22 is a bottom view of the drill spindle shown in Figure 21,

Figure 23 is a plan view of the tool-holding chuck shown in Figure 21,

Figure 24 is a detail view of a portion of the work table raising mechanism, and Figure 25 is a fragmentary view of a portion of the mechanism illustrated in Figures 16 and 18.

Referring now particularly to Figure 1, I have shown therein a base 1 upon which is mounted a column 2 which supports the frame 3 of the drill press. The latter has the usual cone pulley arrangement lWhlCll is arranged to be driven by a similar pulley arrangement 5 one drive shaft 6, bearing the zusual driving pulleys, such as that shown Carried by the upper portion of the frame 3 is a housing 8. for the clutch mechanism like that shown in Figures 2 and 3. As will be seen from Figure l, the shaft 9,

upon which the pulleys 4 are mounted, is journalled in bearings 10 carried by the frame 3, and enters the housing 8. At the end of the shaft 9 is a pinion 11 and also a gear 12, both the pinion and the gear being rigidly secured to the shaft 9. The pinion 11 is arranged to mesh with a gear 13, loosely mounted on a shaft 20 in the housing 8. The gear 12 engages a beveled gear 14. By this arrangement the gears 13 and 14 are driven in opposite directions. The gear 13 is provided with a clutch member 13 The gear14 has a clutch member '14. These clutch members 13 and 14 are designed to be engaged by a movable clutch member 15 which surrounds the spindle shaft 20, and which is splined to the shaft so as to move therealong, but to cause the rotation of the shaft when in engagement with either of the clutch members 13 or 14 The engagement is effected by means of a handle 16 which is pivotally mounted in the housing at17 and which is provided with a yoke 18 arranged to engage in a groove 19 in the clutch member 15, so that by operating the handle 16, the clutch member may be shifted to bring the spindle shaft 20 into operative engagement with either of the gears 13 or 14', so as to turn the spindle in either direction at will. The spindle 20 passes downwardly through the housing 8'and through the casting 21 (see Figure 10) which is supported by an extension of the frame 8. W'ithin this housing is a slidable feed rack 22 (see Figure 10) which has rack teeth 23 arranged to engage a pinion 24 mounted upon or a part of a sleeve 25 to turn with the sleeve, and hence toraise or lower the rack 22. At the outer end of the sleeve 25 is a wheel 26. having a series of nobs 27 by means of which the wheel. may be turned. In order to facilitate the turning, I provide a handle 28 which is hinged at 29 to a rod 30 which enters the sleeve to which is secured a spring 31, the oppositeend of the spring being secured to a rod 32 which extends through a reduced portion of the sleeve 25 and has a head 33 which forms part of a thrust hearing 34. By means of this arrangement, the handle 28 may be swung outwardly and rotated so as to enter between any two of the nobs 27, when it may be used as ahandle for turning the wheel 26, the spring 81 keeping the handle in its shifted position while permitting it to be moved to another position. The spring 31, while it has a tendency to hold the handle/lever 28 at a right angle, it is made to have a greater tendency to hold lever 28 standing straight out or in a parallel line with sleeve 25. The purpose of this is to bring the weight into as smallfa radius as possible, so as to permitthe quick downward. and upward return of the spindle shaft, and at the same time not interfere with the tool magazine. The feed rack 22 bears at its upper end a lateral extension which surrounds the spindle shaft. The upper and lower thrust bearings86 and 37 respectively (see Fig.

spindle shaft, a larger number of magazine tool-holding sleeves may be used with a given size magazine, as will appear later.

As will be seen from Fig. 1, a cable 38 is secured to the upper end of the feed rack 22 and passes over pulleys 39 and 40 on the inside of the frame 3, being secured to a counterweight 41. A handle 42 is also provided on the portion 35 of the feed rack 22 which surrounds the spindle, shaft 20.

In that form of the device shown in Figure 1, a magazine is provided for holding the chucks for the variousbits or drills or any other suitable tools that are to be used. This magazine comprises a circular plate43 (see Fig. 19) having downwardly extending sleeves 44 which may be made integral with the plate 01 secured thereto in any suitable manner. The plate has a central hub 45 which surrounds the column 2 and about which the magazine may be rotated. Each sleeve 44 (see Figs. 20 and 21) is provided with a chuck 46, the lower end of which has a tapered socket 47 to receive the shank 48 of the tool 49. The upper end of the chuck is provided with recesses 50 and extensions 51, the recesses 50 being arranged to receive extensions 52 of the drill spindle 20 and the projections 51. arranged to enter recesses or sockets 53 of corresponding contour, so as to lock the spindle to the chuck. In order to positively lock the two together, I provide spring locking dogs, such as that shown at 54 in Figures 20 and 21. Thelower end of the dog is secured to the chuck body by screws '55 or by any other suitable means. The normal position of the dog is. that shown in Figure 21 in which the ends 54 are held outwardly away from the drill spindle. I is in engagement with the socket and has forced the latter downwardly, the ends 54* of the dogs 54 enter recesses 56 in the drill spindle, thereby positively locking the parts together, as shown in Figure 20. On the retraction or raising of the drill spindle, the chuck is raised to a position where the dogs 54 will spring outwardly, thereby releasing the drill spindle automatically.-

Referring now particularly to Figure 16, it will be seen that the hub 45 of the magazine is provided with a gear 60. Just below the gear are ball or roller bearings 61v which When, however, the drill spindle ported on an arm 64: which has a sleeve 65 slidable with respect to the column 2. The sleeve 65, as will be seen from Figure 24, is provided with a laterally extending flange 66 which is arranged to enter between two laterally extending flanges 67 on a collar 68 throughwhich a screw shaft 69 passes. This screw shaft is journalled at its lower end by;

a socket 70 and extends upwardly underneath the magazine, as best shown 1n Figures land 16. The upper .end of the screw shaft 69 has a reduced portion 69- (see Fig ure 18) which is of uniform width. Above this reduced portion is a further reduced rounded portion 69 about which a coil spring 71 is disposed. The upper endof the coil spring rests against a head or washer 72 held in position by a cotter pin or other suitable means. A cap 73 fitsover the upper end of the reduced portions of the shaft 69 and has a portion 73 upon which the spring 71 also rests. The lower portion of the cap is provided with recesses74 (see Figure 18) to receive lugs 7 5 on a gear 76 which loosely surrounds the shaft 69 and is in mesh with the gear 60. As will be seen from Figure 16, the collar, or enlargement 62 has ian -extension 62 which forms a journal for the shaft 69. This extension has an upright 76, at the top of which is pivotally mounted a lever 77 which is connected by a link 78 with a handle 79 pivotally mounted at 80. Theopposite end of the lever 7 7 is connected by a rod 81 with a head 82 which is disposed on the inside of the cap 7 3 (see Figure 18).

The arrangementjust described is such that when the handle 79 is in the position shown in Figurel6, the cap 73 is in driving engagement with the gear 7 6, so that when the magazine 48 is rotated, the shaft 69 will be turned through the medium of the gears 60 and 76, thereby causing the table 63 to lower or raise, depending upon the direction in which the magazine is turned, When, however, the handle 79 is thrown downwardly past its center, then the cap 78 will be raised against the tension ofthe spring 71, whereupon the gear 76 willrotate idly, and the screw shaft 69 will not be turned when the magazine is rotated.

In order to lock the magazinein any of its shifted positions, I provide a Y-shaped locking member 83 (seeFigure '1) which is hinged at 84 to the frame 3 and which has a. portion 85 arranged to enter between the sleeves L4: in one of the spaces 86 (see Figure '19). Normally, however,'the locking member 83 is kept in the outer positionfree from the sleeves in any suitable manner, as by means of a spring 87 attached to a portion of the frame. A link 1S secured to the locking member 85 at one end and to a treadle 89 which is pivoted at 90. On depressing the outer end of the treadle 89 the member 85 will be swung inwardly between the two sleeves which happen to be in'regis tration, thereby locking the no agazine against rotation. Y i

In Figure 4 I have shown a modified form of the device, in which the magazine consists of aseries of sleeves 91 which are hinged together at 92 and which are arranged to form an endless belt, passing around a sprocket wheel 93 (see F igurel l) at one end and a similar sprocket wheel 94: at the other end The sprocket wheel 93 is mounted on the downwardly turned portion 96 of along arm or framememher 96 which has a portion surrounding the column 2, upon which it is slidably mounted. being balanced by a counterweight 97. The forward sprocket wheel 94 is rotatable on the column 2. In order to move the endless belt to bring the sleeves into position with respect to the spindle shaft to permit connection of the latter with the tools in the sleeve tool-holders, I provide a lever 98 (see Figure 15) upon which is mounted a spring pressed pawl 99 arranged to engage teeth 100 on the forward sprocket wheel 94. The lever has a hub portion 101 which surrounds the column 2 so that when the lever is oscillated, the pawl will engage the teeth of the sprocket wheel, so as to rotate the latter and hence cause the movement of the endless belt.

In order to lock the belt in its adjusted positions, I provide the forward sprocket wheel 9-4- with recesses 102into which the end of a locking bolt 103 may project. Nor inally this bolt is held in a retracted position by means of the spring 10% in a housing 105 underneath the arm 96. A. lever is pivoted at 107 on the frame 3, the lower end of this lever being pivotally connected by a link 108 to a bell. crank lever 109, the outer portion of which forms a treadle 110. A guide member 111 is secured to the arm 96 to guide the lever in its movement. It is obvious that by pressing the treadle 110 the lever 106 will be swung to the left'in Figure l. As will be seen from Figure 7, the lever engages a shoulder on the locking bolt 103 thereby forcing it into the openings 102 and thus locking the sprocket wheel 94: and hence the endless belt, from movenient, as long as the a gear *117arranged to mesh with a gear" 118 on the screw shaft '119, whose lower end is journalled at 120 on an extension of the frame member 95, whose upper end is joure nalled in a socket'121. As will be seen from Figure 9, the shaft 112 has a collar 122 below which is a slidable gear 123 which is splined to the shaft 112, but which may be moved by means of the lever 124: into or out of mesh with the teeth 100 on the sprocket wheel 9%. When the lever, 12% is turned in the position shown in Figure 9, then the gears 100 and 123 are in mesh and the gear 118 is driven to move upwardly or downwardly on the screw shaft 119, at the same rate that the screw shaft 112 moves downwardly. A collar 125 (see Figure 8) supports the arm 96 at its outer end, while the collar 122 (see Figure 9) supports. it near the column, so that the whole magazine may be raised or lowered when it is rotated by means of the lever 98, as described.

The table 63 may also beraised or lowered, and to this end I provide a rod 126, preferably of square cross section which is designed to enter a square opening running I lengthwise of a threaded shaft 127, which is journalled at 128'in the base and whose upper end is engaged by a threaded portion 129 on a collar130 which supports the hub 130 of the arm which bears a plate 63. The

upper part of the rod 126 may be connected;

in operative relation with the magazine in precisely the same manner as that indicated in connection with the arrangement shown in Figures 1 and 16, and when so connected, the rod 126 will turn when. the magazine is moved, thereby turning the threaded shaft or rod 127 and causing the raisi g or lowering of the work table 63. i

In the modified form of'the device shown in Figure-11,1 provide a plate or ring 131 bearing a plurality of individual magazines 132, each of these being of the type shown in Figure 19. In this form of the device, the main plate 131 may be rotated to bring any of the magazines into approximate position, and then the individual magazine may be rotated to bring the particular tool desired into registration with the drill spindle, thus providing a. great number of tools for a given-radius. The drill spindle, of course,

enters the sleeves, as'stated, and in order to provide for the entrance of the feed rack, I provide the openings, such as those shown at 43 132, 93 and 94* in the plates 13, 132, and in the sprocket wheels 93 and 94: respec-. tively. This permits the drill spindle to be fed asfar as desired.

In Figure 13 I have shown another modified form of the device, in which the column 2 is provided with upper and lower ears or brackets 133 and 13 1 respectively, which may e secured to the column in any suitable manner. 'A frame 135 is provided which fits in between the ears and which may be held in' used in the ordinary manner by fitting an ordinary tool on the drill spindles Two of these magazines may be used by providing a second frame, such as that shown at 135 and a duplicate of shaft 137, and a second magazine,one on either side of the frame, so that, for instance, one may be supplied with tops for cut-ting threads or other tools, while the other magazine may hold drills or other tools. One of these magazines may be swung in under the spin dle from'the right, and the desired tool used, and then it may be swung around back out of the way, and the magazinevfrom the left is swung inunder the spindle, and thedesired tool used, or both magazines may be swung back out of'the way and the drill press used in the old ordinary way.

I claim: I

i 1. In a drill press, a frame, a driving spindle carried thereby, a. magazine comprising an endless belt of tool-holding sleeves hinged together, means for moving the belt to bring any of thesleeves into registration with the driving spindle, and means for raising and lowering said magazine through the movement of the endless belt. i

2. Ina drill press, a frame, a driving spindle carried thereby; a magazine. comprising an endless belt of tool-holding sleeves hinged together, means for moving the belt to bring any of the sleeves into registration with the driving spindle, means for raising and lowering said magazine through the movement of the endless belt, a work table, andmeans for'also raising and lowering the work table through the movement of. the endless belt.

3. In a drill press, a column, a frame supported thereby, a driving spindle vertically slidable on said frame, anauXiliary frame, a sprocket wheel mounted for rotation about said column, a sprocket wheel mounted on said auxiliary frame, and. an endless beltof tool-carrying sleeves hinged together and arranged to travel aroundqsaid sprocket wheels 4. In a drill press, a column, a frame supported thereby. a driving spindle vertically slidable on said frame, an auxiliary frame, a sprocket wheel mounted for rotation about said. column, a sprocket wheel mounted on said auxiliary frame, an endless belt of tool-carrying sleeves hinged together and revolving the belt against movement at will, and meansl arranged to travel. around said sprocket Wheels, and means for causing a progressively forward movement of the endless belt to bring said sleeves into registration successively with said drillspindle.

5. in a drill press, a column, a frame supported thereby, a driving spindle vertically slidable on said frame, an auxiliary frame,

a sprocket wheel mounted for rotation about said column, a sprocket wheel mounted on said auxiliary frame, an endless belt of toolcarrying sleeves hinged together and arranged to travel around said sprocket wheels, means for causing a progressively forward movement of the endless belt to bring said sleeves into registration successively with said driving spindle, and means for loclring the endless belt against movement, at will. i i

6. In a drill press, a column, ported thereby, a driving spindle vertically slidable on said frame, an auxiliary frame,

a sprocket Wheel mounted. on said auxiliary frame, an endless belt of tool-carrying sleeves hinged together and arranged to travel around said sprocket wheels, means for causing a progressively forward move ment of the endless belt to bring said sleeves into registration successively with said driving spindle, means for locking the endless actuated by the progressive movement of the a frame supbelt around the sprocket wheels for raising or lowering the belt.

7?; In a drill press, a driving spindle, a,

magazine comprising an endlessbelt of toolholding sleeves hinged together, means for supporting the endless belt to permit the movementthereof to bring the tool-holding sleeves into registration with the driving spindle successively, a work table, and

holding sleeves hinged together, means for supporting the endless belt to permit the movement thereof to bring the tool-holding sleeves into registration with the driving spindle successively, a work table, means actuated by the movement of the belt for raising or lowering the Work table, and

movement at any point at will. i

9. In a drill press, a column, a frame car ried by the column, a slidable driving spindle carried by the frame, a magazine comprising a body portion rotatably disposed on said column, and having aplurality of rotatable plates, each'of said plates having tool-holding sleeves arranged to be brought into registration with said driving spindle.

, CHARLES E. COX.

means for locking the endless belt against

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