US1893965A - Drill press - Google Patents

Description

Jan. 10, 1933.

C. F. SHERMAN DRILL PRESS Filed Oct. 2, 1929 6 Sheets-Sheet l Jan. 10, 1933 c. F. SHERMAN DRILL PRESS Filed 001;. 2, 1929 6 Sheets$heet 2 Jan. 10, 1933.

C. F. SHERMAN DRILL PRESS Filed Oct. 2, 1929 6 Sheets-Sheet 3 M 1 w w. I V n 3U E 7 l MW W 0 H WW 2 I Z 7 J l 1, J J I 15 H 'M r If l\t I H W l J J I II I v 5 F0 J A 2 JJ 0 3 Ell/q Mm m MW Jan. 10, 1933. c, SHERMAN 1,893,965

DRILL PRESS Filed Oct. 2, 1929 6 Sheets-Sheet 4 477%EIPNEY Jan. 10, 1933. c. F. SHERMAN DRILL PRESS Filed Oct. 2, 1929 6 Sheets-Sheet 5 I I I M l '4 lP/VEY Jan. 0, 1933.

C. F. SHERMAN DRILL PRESS Filed 001;. 2.

1929 6 Sheets-Sheet 6 Patented Jan. 10, 1933 "UNITED STATES a w W a I a:- i J: F (a. L1

CORTIS F. SHERMAN, 0F HARTFORD, CONNECTICUT, ASSIGNGB. TU THE HEh R-Y &

WRIGHT MANUFACTURING C0 #EIPANY, OF HARTFORD, CGNEEOTECUT, A COREORA- TION OF CONNECTICUT DRILL PRESS Application filed October 2, 1923.

My invention relates to that class of machines employed for drilling articles that are usually supported upon the machine, and an object of my invention, among others, is to provide a drill press of this type with power operated means for feeding the drill which may be utilized as occasion may require and which shall not interfere with the manual feed when such may be required; and a fur O ther object of the invention is to provide a drill of this type having means for feeding the spindle at various speeds; and a further object is to provide a machine of this type that shall be particularly rapid and efficient in operation.

One form of a machine embodying my invention and in the construction and use of which the objects therein set out, as well as others, may be attained, is illustrated in the accompanying drawings, in which Figure 1 is a View in front elevation of my improved drill press with the lower portions of the base removed.

Figure 2 is a side view of the same.

Figure 3 is a top view, with parts underneath removed.

Figure 4 is a detail view, scale enlarged, in horizontal section on a plane denoted by the dotted line 4-4 of Figure 6.

Figure 5 is a view, same scale as Figure 4, in vertical section on a plane generally denoted by the dotted line 55 of Figure i, parts being brokenaway.

Figure 6 is a view in vertical section on a plane generally denoted by the dotted line 66 of Figure 4.

Figure 7 is a detail front view showing the mechanism for connecting the spindle with the driving mechanism.

Figure 8 is a view partially in verticalsection through the mechanism shown in Figure 7.

Figure 9 is a top view of the same, the

u 3 er art of the machine includin the drill spindle being removed.

- Figure 10 is a detail view illustrating tiie power feed mechanism.

Figure 11 is a view in section on a plane generally denoted by the dotted line 11-11 of Figure 10.

Serial lie. 396,719.

Figure 12 is a View similar to Figure 11 but with parts removed to further illustrate the power feed mechanism.

Figure 13 is a view in section on a plane denoted by the dotted line 1318 of Fi i ure 12.

Figure 14 is a view in section on a plane generally denoted by the dotted line 141-14 of Figure 10.

Figure 15 is a view in side elevation of the lower support for the drill spindle looking at the opposite side thereof from the point of view of Figure 10.

F igure'16 is a view in section on a plane generaily denoted by the dotted line 1616 of Figure 10.

Figure 17 is a view similar to Figure 16 but with parts removed to further illustrate the construction, and with certain 'parts and support various parts of the mechanism.

A driving shaft 8 is supported at the back of the base and may be driven as by a pulley a or motor 9. The driving shaft is connected, as by mtermeshmg bevel gears with a connectlng shaft 10 supported at 1ts lower end by the base and at its upper end in the I head 7, and also at one end of a supporting bar 11 secured to the upper ends of supporting posts 12 secured to and rising from the head 7. A stepped or so-called cone pulley 13 is secured to the upper end of the shaft 10 u D and operates as by means of a belt 14 to 1mpart movement to a cone pulley 15 mounted at the front end of the supporting head and operating to drive a drill spindie in a manner to be hereinafter described. The belt 14: may

be shifted from one to another step of each 9 of said pulleys as by means of guides 17 projecting from opposite sides of a belt shifting bar 18 mounted for sliding movement on the posts 12. Said bar is secured to a shifting post 19 slidably supported on the head Cir engagement with a spindle rotating gear 4C3 preferably formed on the wall of a recess in 7' and at its upper end in the bar 11, said post having at its lower end a rack 20 meshing with a pinion on a shaft 2-1, said shaft having a bevel pinion secured thereto and meshed with a bevel pinion 22 on a belt shifting shaft 23 rotatably mounted on the head 7 and having a hand wheel 24 as a means for manually shifting the belt. The post 19 has notches or grooves to receive a spring-pressed detent 25 projecting into the opening in the bar 11 through which the post 19 extends.

A drill spindle 26 is mounted on the standard for longitudinal reciprocating movement thereon as by means of a bearing sleeve 27 for the lower end of said spindle, said sleeve being longitudinally movable in a spindle supporting bracket 28 secured to and projecting from the standard or column 6. To effect such movement, a rack 29 secured tothe sleeve has its teeth meshed with the teeth of a spindle feed pinion secured to a spindle feed shaft 31 rotatably mounted in-the bracket 28 and having a handle or bar 32 as a means for lowering the sleeve and the spindle against the force of a weight 33suspended from a chain 8st passed over (a sheave 35'loosely mounted on the shaft 21 and adjustably detachably engaged with notches in a bar 36 pivotally attached at one endto a collar 37 secured to the sleeve 27. That end of the bar 36 opposite the collar 37 is pivotally attached to the bracket 28 of .the machine and said collar is secured to the upper end of the sleeve 27, as by inter-engaging screw threads, and as shown in Figure 6 of ithe drawings. As will be understood, the spindle is freely rotatable in the sleeve 27 butis secured thereto for longitudinal movement by means of a ring 38 secured to the spindle and engageable with a shoulder on the interior of the sleeve, said ring and a ball bearing toaid rotatable movement of the spindle inthe sleeve being secured to said spindle as bymeans of a nut 39.

The cone pulley 15 is secured to a driving sleeve 40 freely rotatably mounted on the spindle and supported as by means of a ball bearing in a case 41 secured to the head 7 A driving gear 42is secured in any suitable mannerto the lower end of the sleeve, as by means of flanges on the gear and sleeve bolted together.

As a means for stopping the drill spindle at will and without stopping the driving mechanism, the driving gear 42 is adapted for a :feed driving gear #14 to be more particu- :larly hereinafter referred to. A gear is shown herein as keyed to the hub of the driv- :gear 44:, but this may be disregarded for the purposes of this application, it being shown simply from the fact that it constitutes a part of the machine and 1s employed 11100111160131011 with a mechanism for rotating the spindle at varying speeds, and which mechanism is omitted from the showing herein.

The hub do of the gear ist is of considerable length and is sup )lied with ball bearings of any ordinary type, said bearings and a guard actuating sleeve, to be hereinafter described, being secured to the hub as means of a nut threadedly engaged with the hub, said sleeve properly spacing the bearings, as shown in Figure 6. Said bearings, sleeve and gear hub are supported for movement longitudinally on the spindle by means of a carrier l? rotatably and longitudinally movable in a housing 18 secured to the under side of the forwardly projecting part of the head 7. A. ring 49 is also secured to the end of the carrier as a means for support of the ball b arings.

As a means for shifting the carrier 17 to engage the gear at with the gear 12, I provide a gear shittin handle 50 projected through an angularly extending slot 51 through the wall ofthe housing 18 and cxtended cireumfercntially thereabout. \Vhen said handle is moved along said slot and reaches the upwardly inclined part thereof, it acts to raise the carrier and thereby mesh the teeth of the gears 42 and ldhand when so meshed, the spindle driven directly from the gear 42.

The teeth on the periphery of the carrier -17 may be disregarded for the purposes of this application, it being employed in this particular machine for shifting gears in the change speed mechanism which is omitted herein.

In order to prevent an attempt to mesh the teeth of 'he gears 42 and 43 when the former is rotating, a guard is employed having pins m shing with spiralgrooves in the outer surface of an actuating sleeve 53, whereby, when the spindle is rotating, the guard is raised and prevents movement of a plunger to release the handle 50 which is held by a detent Further and detailed description of this portion of the mechanism is omitted herein for the reason that it forms the subject matter of another and (o-pending application. 1

As hereinbefore mentioned, this application has to do particularly with means for mechanically feeding the drill spindle, as well as for manually feeding said spindle, said mechanism also embodying means for feeding the spindle at different speeds. In the mechanism herein shown a gear 56 and a pinion 5? are mounted in a box 58 secured to one side of the head 7, the gran: :36 meshing with the feed or' ring gear il hereiubefore referred to, and the pinion 5T meshing with a gear 59 secured to a spindle (i0 rotatably mounted n a bearing in a hub (51 projecting downwardly from the under side of a supporting plate 62 secured to the under side of LLLD the bOX 58, enclosing the chamber therein. A cone pulley 63 is also secured to the spindle and is connected as by means of a belt 64 with a second cone pulley 65 rotatably mounted on a stud shaft 66 secured to and projecting downwardly from the under side of the plate 62, (see Figure 5 of the drawings). The cone pulley 65, in the struc ture herein shown, is secured to the hub of a gear 67 meshing with a gear 68 secured to a spindle feed shaft 69. A spring pressed belt tensioning idler 70 may be rotatably mounted upon an arm also rotatably mounted on the stud shaft 66, and as shown in Figure 5.

The shaft 69 is supported at its upper end by the plate 62 and said shaft extends down wardly through a tube 71 and into the bracket 28 in which it is rotatably supported at its lower end. A worm 72 is secured to the lower end of the shaft and meshes with a worm wheel 73 located in a chamber Yet in the bracket 28, and as shown in Figure 11 of the drawings. Said worm wheel is secured to the flange of a driving sleeve 75 rotatably mounted in the bracket 28 and con taining a driving clutch member 76 and a driven clutch member 77, the latter projecting out of the sleeve, and as shown in Figure 11 of the drawings. The driving clutch member is mounted to rotate freely on the spindle feed shaft 31, hercinbefrn'e mentioned and is splined to the sleeve 75. T he driven clutch member 77 may move longitudinally on the shaft but will effect rotation of said shaft, it being splined to said shaft. The shaft 31 is rotatably mounted at one end in the bracket'QS and at its opposite end is rotatably iimunted in a manually operated feed member 78 rotatably mounted in a cap 79 secured to the bracket 28, enclosing the chamber 7 1 therein. The driving clutch member 76 is seatec against cushioning pins 80 resting against springs in recesses in the driving sleeve 75, there being three of these.

pins in the structure herein shown;

A spring 82 is Secured at one end to a sleeve engaged with the shaft 31 and at its opposite end to the bracket 28 to impart a yielding rotative force to said spindle.

A spring is located in a thimble in the end of the shaft 31 and presses against the handle 32 to yieldingly retain it in different positions in a manner common to devices of this kind. Another spring 83 is eated in the bottom of a hole extending inwardly from the end of the shaft 31 and is engaged with a pin 8 1- eittending through slots in the wall of said hole and into the driven clutch member 77, tending to force the latter from engagement with the driving clutch member.

In order to permit the spindle to be returned to its normal position when a hole has been drilled to the required depth, I provide two rings 85 and 86 that secured to the, feed member 7 8 as by means of a nut 87. The ring85 is provided with a releasing stud 88 that is adapted to strike a releasing stop 89 projecting from the bracket 28. The ring 86 has a stop stud 90 adapted to strike a stop lever 91 pivotally mounted on the cap 79 and which may be swung from the path of movement of the stud 90 by means of a holder 92 rigidly connected with said lever and llililng a detent to engage recesses in the cap 79. T is driven clutch member 77 may be held disengaged from the clutch member 76 by means of a clutch holder 93 in the form of a spring pressed plunger having its end engageable \Vlcl a notch 94: in the end of the clutch. member 77, and as'shown in Figures 11 and 12 of the drawings. The plunger is held in its disengaged position as by means of a pin 95 engaged with the end of the member 78, but rotatable for location in a slot 96 in said member 78 to permit engagement of the plunger with its notch 94 and as shown in Figure 11.

The drill spindle may be fed manually by the usual method after the clutch members 7 6 and 77 have been disengaged and held by tion power applied to the handle 32 will be transmitted through the feed member 78 to the feed shaft 31 through the key or spline connecting said members.

hen the feed of the spindle is to be offected by power, the ring 85 will be rotated to locate the stud 88 in the proper position to determine the depth of the hole to be drilled and the plunger 93 will be disengaged from the notch in the driven clutch member 77. thus permitting freedom of movement of said clutch member.

Power is now transmitted from the driving shaft 8, in a manner that will be understood from the foregoing description, to the driving gear 42 on the drill spindle 9.6, and said gear being in mesh with the gear 43, said gear and the gear l-l will be rotated and the power will be transmitted to the gear 56, pinion 57, gear 59, pulleys 63 and 65 by the connecting belt to the gear 67. and gear 68 to th spindle feed shaft 69. The worm 72 on said shaft will rotate the worm wheel 73 thereby transmitting rotation to the driving sleeve 75, which, being keyed to the clutch vmember 76, will rotate the latter freely on the shaft The clutch members 7 6 and 77 being engaged, rotation will be imparted by the latter clutch member to the shaft 31 and the pinion 30 in a direction to cause feeding movement of purposes.

During this operation, if it be desired to accelerate the movement of the shaft 31, this may be done by means of power applied manually to the handle 32, thereby rotating the the spindle 26 for drilling i feed member 7 8 and the clutch ..member '77 through the pin and splined connections between said shaft and clutch member. This accelerated movement of the clutch member 77 will be permitted by reason of the bevels on the teeth between the two clutch members which will cause the teeth of one member to ride over the teeth on the other member, the cushioning pins 80 permitting .a yielding of 3 the clutch member 7 6 for this purpose.

The spindle feed mechanism being in operation, and the ring 85 having been set to determine the depth of the bore to be made by the drill, the feed will continue until the stud 88 makes contact with the releasing stop 89. During such feeding movement the pins 97 projecting from the feed member 78 will be located in the horizontal portion of the slots 98 in the clutch member 77. The feed member 78 having ceased to rotate, revolution of the pins 97 is stopped, but the action of the clutch member 76 still continues to rotate the clutch member 77 with aresult that the latter traveling ahead passes the pins 97 along the inclined portion of the slots 98 thereby moving the clutch member 77 from engagement with the clutch member 76, which operation stops the feed of the spindle. There being nothing now to prevent backward rotation of the shaft 31, the spring 82 causes backward movement of the feed mechanism that raises the spindle to its initial position.

The action of the spring 82 is such that the pins 97 will be retained against the edges of the inclined portions of the slots 98 and the clutch member 77 is therefore retained from engagement with the clutch member 76. In the backward movement of the'parts just referred to, the stud 90 will make contact'with the lever 91 thus stopping rotation of the feed member 78, and the force ofthe spring 82 acting through the shaft 31'and the clutch member 77 will rotate the latter, passing pins 97 along the inclined portions of the slots 98 into the horizontal portions thereof, and the clutch member 77 is forced into position for engagement with the clutch member 76 in readiness for a repetition of the feeding action hereinbefore described.

In accordance with the provisions of the patent statutes I have described the principles of operation of my invention, together with the device which I now consider'to represent the best embodiment thereof; but I desire to have it UHdCIStOOCltllfit the device shown is only illustrative, and that the invention may be carried out by other means and applied to uses other than those above set out.

I claim:

1. In drilling machines, wherein the rotatable spindle is shiftable axially between inactive and work-performing positions, a rotatable feeding member operatively connected with the spindle for shifting the latter, power-operated mechanism including a worm andits gear, a manually-operable element, and means for operably connecting said tation .of the feeding member when the clutch members are in clutching engagement, means operatively connecting said element with the keyed clutch member in a manner to permit limited relative rotation therebetween to thereby shift such clutchmember into and out of clutching engagement, and separate means operable at will for locking the element and keyed clutch member against relative rotation when the latter is out of clutching engagement, the other clutch member being permanently operatively connected to the power-operated mechanism.

2. A machine as in claim 1 wherein the means connecting the element and clutch member is in the form of a pin and slot connection, said connecton during clutch engagement forming a manual drive for accelerating feed movements of the keyed clutch memher by manual movement of the element in the direction to retain such clutching engagement,

3. A machine as in claim 1 characterized in that the clutch member operatively connected to the power-operated mechanism is spr ng-supported to permit yielding thereof during over-running activity of the keyed clutch member.

4. A machine as in claim 1 characterized in that the additional means includes a plunger carried by the element and adapted to co-operate with a recess of the keyed clutch-member, said recess being relatively positioned to permit such co-operation only when such clutch-member is out of clutching engagement.

5. A machine as in claim 1 characterized in that the operative connection between the worm gear of the mechanism and said other clutch-member is in the form of a sleeve interposed between and connected with gear and clutch member with the connection between sleeve and clutch member having a splined characteristic.

6. In drilling machines, wherein the ro tatable spindle is shiftable axially between inactive and work-performing positions, a rotatable feeding member operatively connected with the spindle for shifting the latter; power-operated mechanism including a worm and its gear; a manually-operable element; means for operably connecting said mechanism and element to the feeding member to provide feed movements of the latter individually by the mechanism or element or concurrently by both, said means comprising a pair of clutchmembers each carried by and movable longitudinally of the feeding member, one of the clutch members being keyed to the feeding member, said clutch members having their clutching faces arranged for overrunning action in one direction of rotation of the feeding member when the clutch members are in clutching engagement, means operatively connecting said element with the keyed clutch member in a manner to permit limited relative rotation therebetween to thereby shift such keyed clutch member into and out of clutching engagement, and separate means operable at Will for locking the element and keyed clutch member against relative rotation when the latter is out of clutching engagement, the other clutch member being permanently operatively connected to the power-operated mechanism; counter-balance means operative through the feeding member to return the spindle to inactive position; and control means operative through the element to selectively make or break the clutch engagement when the spindle is in either extreme of its feed movement to provide an automatic drilling cycle.

7 A machine as in claim 6 characterized in that the control means includes a pair of members carried by and movable with the element and each having a stop adapted to co-operate with a stop element individual thereto and carried by the framework of the machine.

8. A machine as in claim 6 characterized in that the control means includes a pair of members carried by and movable with the element and each having a stop adapted to co-operate with a stop element individual thereto and carried by the framework of the machine, one of the stop-carrying members being rendered active as a control by movement of the feeding member in one direction, the other stop-carrying member being rendered active as a control by movement of the feeding member in the opposite direction.

9. A machine as in claim 6 characterized in that the control means includes a pair of members carried by and movable with the element and each having a stop adapted to co-operate with a stop element individual thereto and carried by the framework of the machine, one of the stop-carrying members being rendered active as a control by movement of the feeding member in one direction of rotation, the other stop-carrying member being rendered active as a control by movement of the feeding member in the opposite direction of rotation, each stop-carrying member being adjustable individually to control the length of movement of the spindle between its extremes of movement.

10. A machine as in claim 6 characterized in that the control means includes a pair of members carried by and movable with the element and each having a stop adapted to co-operate with a stop element individual thereto and carried by the framework of the machine, one of the stop-carrying members being rendered active as a control by movement of the feeding member in one direction of rotation, the other stop-carrying member being rendered active as a control by movement of the feeding member in the opposite dirction of rotation, a frame-carried stop element being shiftable between active and inactive positions.

CORTIS F. SHERMAN.

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