US2357728A - Multiple drilling device - Google Patents

Description

P. DE ANGUERA MULTIPLE DRILLING DEVICE Sept. 5, 1944.

Filed June 25, 1942 2 sheets-sheet 1 INVENTOR. I flaw v dc lfrzjuera W1 llv ll ooOoobnioonn-u abflcrrncoobbs III II II no anon-006 00 Patented Sept. 5, 1944 2,357,723 MULTIPLE DRILLING DEVICE Philip de Anguera, Norwood, Ohio, assignor to Eva de Anguera Application June 25, 1942, Serial No. 448,388

(Cl. 'l722) 2 Claims.

The present invention relates to multiple drilling machines and is particularly directed to a machine of this general type for operating upon assembled vehicle chassis or other similar mobile :and relatively massive structures.

. An object of the invention is to provide an integral drilling mechanism which is univere sally shiftable relative to a comparatively massive piece of work operated upon and which is clamped to said work for the feed and return operation of .thedrilling spindles.

A, further object ofthe invention is to provide a universally shiftable and integral multiple spindle drilling mechanism which is suspended .from a carrier system-connected to said mechanism at substantially its center of gravity to thereby present a simplified and an efficient means for operating upon a comparatively massive piece of work.

Another object of the invention is to provide a universally shiftable and integral multiple spindle drilling mechanism which has a work engaging frame fornormally supporting the drill head of the mechanism and a feed and return device associated with the head and frame which in normal position isirreversible to thereby preclude relative movement between said frame and head when'the drilling mechanism is bodily shifted from an operative position to the following opera tive position.

Other objects of the invention will be apparent from the following specification and drawings which illustrate the preferred embodiment of my invention, and in which:

Fig. 1 is a fragmental, front elevational view of the drilling mechanism illustrated in operative position on an assembled vehicle chassis, parts Fig. 6 is a plan detail view of the spindle mount-. ing means for the head of the drilling mechanism.

Fig. 7 is a fragmental, side elevational view of the feed and return device, the dotted lines indicating the device in its lower limit of feeding motion.

My multiple drilling mechanism is illustrated as operating upon an assembled vehicle chassis such as a platform trailer body H] which is stationarily positioned relative to the mechanism and has a number of spaced longitudinal I-beams H supporting upon their upper horizontal portions a number of wooden planks I2 which are shown as disposed transversely of the chassis. Longitudinal angle irons l3 are held in position along the longitudinal edges of said chassis by clamps M which are moved ahead of the drilling mechanism in the direction of the arrows (Fig. 2) as said mechanism is intermittently and progressively advanced in'said direction. The trailer is provided with conventionalrear wheels I5 and is supported at its front end on a fifth wheel of a tractor, (not shown),'in the usual manner. An integral multiple spindle drill carriage I6 is disposed transversely of the chassis and comprises an elongated spindle head I! and a chassis engaging frame I8 for operativelyy positioning said head relative to the chassis and also guiding it for vertical movement when said spindles are fed or returned during the drilling operation.

The drill head I! has 'two spaced elongated members l9 and 20 disposed transversely of the chassis with the ends thereof extending beyond the longitudinal edges of said chassis. Mounted between the members are a number of drill spindles 2|, and as most clearly shown in Fig. 6, the members l9 and 20 are provided with vertical grooves 22 for receiving split blocks 23 whichsB- curely engage each of the spindle journal housings 24. Longitudinal bolts 25 securely clamp each block 23 between the members and about the spindle housings 24 to rigidly hold said spindles in vertical positions in the spindle head. Motors 26 are alternately positioned on opposite sides of the head and individually drive each spindle 2| through a pulley and belt arrangement indicated generally as 21. It will be noted that the spindles and the drive motors therefor are disposed on the head so as to locate their common center of gravity at the central portion of said head to provide a balanced multiple drill head for the purposes to be hereinafter set forth.

The integral carriage is also provided with a head-positioning and guiding frame l8 which has two spaced chassis engaging blocks 28 rigidly connected by two spaced'cross members 29, which are fastened at their ends to the blocks by bolts 39, (Figs. 1, 4 and 5). The blocks 28 are adapted to engage the upper surface of the angle irons l3 of the chassis and have depending portions 3| for transversely positioning the frame relative to the chassis. The head is guided for vertical movement in the frame by means of upstanding guide posts 32 which are anchored at their lower end to the blocks 28 and move in sleeves 33 rigidly clamped between the members [9 and 20. The means for resiliently supporting the head in the frame in normal spaced relation to the chassis consists of an inverted U-shaped standard 34 positioned on each end of the frame. The standards are bolted to the blocks 28 and each carry at their upper end two cross arms 35, springs 36 being adjustably secured to the ends of said arms and fastened at their lower ends to the members l9 and 20 by bolts 31.

The means for clamping the ends of the frame to the chassis in each of its progressive operative positions, comprises levers 38 which are rotatably mounted on each of the blocks 28 subjacent the head guides 32. As is most clearly shown in Figs. 3 and 4, the levers 38 are spaced from the underside of the blocks 28 by spacing members 39, said levers and members being fastened to said blocks by bolts 40. By rotating each lever its short end is brought into contact with the inclined underside of the top horizontal member of the end I-beams ll, thus camming the blocks 28 into rigid clamping action with the chassis. The feed and return mechanism for the multiple spindle drill head which vertically reciprocates the head relative to the frame when it is clamped to the chassis thereby moving the spindles into and out of engagement with the work comprises two eccentric cams 4| each fixed to a transverse connecting rod 42 adjacent its ends, the latter being journalled at its intermediate end portions in bearing blocks 43. The blocks are mounted on the head'by means of straps 44 which encircle the head and are fastened to the ends of the head members by bolts 45. The bearing blocks 43 are positioned upon the upper horizontal portions of the straps and 'are fastened thereupon by bolts 46, The eccentric cams have a beveled periphery 41, (Fig. 4) which are rotatably engaged by circular followers 48 provided with interior wedge-shaped grooves. An arm 49 extends downwardly from each follower and is pivoted to each block 28 by a bolt 50. The ends 52 of the connecting rod extend through the cams and each end has fixed thereto oppositely disposed hand levers An upper and lower limit stop for the'feed mechanism takes the form of a block 520 fastened to the member 20 (Fig. 3), which permits oscillating movement of the arm 49 on the right side of the block when the eccentric cam is operated and confining the latters movement to an arcof 180;

A carrier system for vertically lowering and raising the frame and head upon and away from the chassis and also permitting longitudinal movement of said frame and carriage relative to the chassis is illustrated as consisting of a hoist 53 having a motor 54 for raising and lowering a flexible cable 55 through conventional mechanism (not shown). The lower end of the cable has a hook 55 fastened thereto which engages converging straps 51 fastened to the spindle head at its central portion where the common center of gravity for the frame and spindle head is located. The hoist motor is reversed by means of a control cable 58. The hoist is freely movable longitudinally of the work on an overhead track 59 which extends along the approximate center of the chassis and is coextensive therewith, said track having spaced wheels 60 riding upon its upper horizontal surface which are connected to the hoist by integral arms Bl.

In operation the multiple spindle drill carriage is suspended by the carrier 53 in a position to permit the assembled trailer chassis ID to be moved thereunder into a position with the track 59 in the approximate plane of the longitudinal center of said chassis. The carriage is then moved to its initial operative position above the chassis by operators stationed at each end of said carriage and the control cable 58 is then operated to lower said carriage upon the chassis so that the frame l8 rests upon the longitudinal angle irons I3. The frame is then clamped to' the chassis by means of levers 38 and thereafter the spindle head is fed and returned within the carriage by manual operation of the eccentric cams 4|, After said multiple drilling operation, the frame is released from clamping condition with the chassis and the hoist is then actuated to move said carriage away from the work, whereupon the carriage can be moved longitudinally to its next operative position above the work. The foregoing operation is repeated until all of the transverse wooden members l2 have been provided with the proper bolt holes, it being understood that the bolts may be inserted into said holes immediately, after the holes have been made by the drilling mechanism. When the carriage is being longitudinally moved above the chassis by the hoist, the head is locked in its upper inoperative position relative to the frame by the position of the eccentric cam which is most clearly illustrated in Fig. 7. In said position the eccentric axis 42 is in vertical alignment with the actual center of said cam with the greater portion of said cam below the axis, thereby precluding rotation of the cam and fixing the positions of the carriage and frame during their longitudinal movement above the chassis. It will also be noted that the end spindles on the head I! are adapted to bore holes through two spaced thicknesses of metal and a relatively deep-hole through an intermediate thickness of wood. As shown in Fig. '7, the cam is adapted for rotation through and its greatest leverage is obtained during the initial movement of the cam and durto position the longitudinal center line of the chassis in alignment with the overhead carrier track and it has also been found that the longitudinal I-beams of the chassis operated upon are slightly bowed, in plan, due to welding or other structural imperfections. It is therefore important to the actual operation of my machine that the shiftable carriage have a degree of lateral flexibility to compensate for said inaccuracies and for these reasons I provide a carrier system which suspends the multiple drill carriage from its central portion where the common center of gravity of all its part is located.

What is claimed is:

1. In a machine for simultaneously drilling a plurality of holes in an assembled chassis the combination of a drill head extending transversely above the chassis, a plurality of drill spindles mounted on the head, drive motors for the spindles mounted on the head, said spindles and motors being disposed on said head to locate their common center of gravity at the central portion of the head, a transverse frame, vertical guides on each end of the frame for directing the movement of the head in said frame, posts on each end of the frame, resilient means fastened to the posts and the head for normally supporting the head in inoperative position above the chassis, means for permitting intermittent movement of the head and the frame longitudinally of the Work to progressive operative positions, said means being associated with the central portion of the head, means on the frame subjacent each guide for clamping the frame to the chassis, and normally irreversible means journalled on the ends of the head and connected to the frame ends for feeding and returning the spindle head relative to the chassis.

2. In a machine for simultaneously drilling a plurality of holes in an assembled chassis the combination of an elongated drill head extending 7 the chassis, means for permitting intermittent on each end of the frame, springs fastened to the posts and the ends of the head for normally supporting the head in inoperative position above movement of the head and the frame longitudinally of the work to progressive operative positions, said means being associated with the central portion of the head, means for operatively clamping the frame to the chassis, and normally irreversible means associated with the ends of the frame and the head for feeding and returning the head relative to the chassis.

PHILIP or: ANGUERA.

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