US844390A - Gearing for drilling-machines, &c. - Google Patents

Description

PATENTED FEB. 19, 1907.

A. E. NEWTON. GEARING FOR DRILLING MACHINES, &0.

APPLICATION FILED AUG. 3, 1901.

ES \S M 4 ALBERT E. NEWTON, OF WORCESTER, MASSACHUSETTS.

eEAnme FOR DRILLING-MACHINES, &e.

Specification of Letters Patent.

Patented Feb. 19, 190':

Application filed August 3, 1901- Serial Nd 70,737.

To all whom it may concern:

Be it known that I, ALBERT E. NEWTON, a citizen of the United States, residing at Worcester, in the county of Worcester and Commonwealth of Massachusetts, have invented a new and useful Improvement in Gearing for Drilling-Machines and the Like, of which the following is a specification, accompanied by the drawings forming a part of the same, in which- Figure 1 represents a side elevation of an upright drilling-machine embodyin m inventlon. Fig. 2 is a plan view of t e aseplate upon which the upright framework is supported and-showing a top view of the counter-shaft, driving-motor, and intermediate gearing. Fig. 3 represents a portion of the counter-shaft with the gearing carried thereon shown in central sectional view in order to disclose the clutching mechanism by which the gearing is connected with the counter-shaft Fig. 4 is a sectional view taken on line 4 4 of Fig. 3. Fig. 5 is a diagrammatic view showing the relative position of a portion of the gearing intermediate the countershaft and the electric motor.

Similar reference figures and letters refer to similar parts in the different fi ures.

My present invention has for its object to provide means for applying power, preferairllly generated by an electrlc motor, to the l-spindle of a drilling-machine, whereby the intermediate connecting mechanism between the drill-spindle and the motor is rendered compact and means are rovided for readily reversing the'motion of t e drill-spindle with an increase in speed without reversing the motor, and I accomplish these results by means of the mechanism hereinafter described and represented in the accompanying drawings, the novel features being set forth in the annexed clailn.

Referring to the drawings, A denotes the base-plate, upon which theupright frame- Work 1s mounted. B is then ri t post holdin the work-supporting tab e and the revo ving drill-spindle C. The drill-spindle C is rotated b a driving-shaft D, carrying a coneulle and connected with the drillspind e C y the beveled gears D D The cone-pulley D is driven by a belt connection E from a similar coneul ey F, carried u on a counter-shaft F. e counter-shaft is inclosed by a sleeve G, havin a radial arm G and a sleeve G, havin a radial arm G The inner or adjacent en s of these sleeves are placed the elastic split rings L L.

of greater diameter than the arms whereby the shoulders 1 1 are formed, and against these shoulders the gears hereinafter mentioned abut and are prevented from longitudinal movement in one direction thereby. The arms G G hold the radially-sliding pins H H, having their'inner ends bearing against the beveled faces 1 1 of a sliding spindle I, held concentrically in the hollow end of the counter-shaft F.

The sliding spindle I is provided with a rooved collar I which is engaged by the forked end of a lever I, connected with a slidingshipping-rod I Turning loosely upon the sleeves G G is a gear J and a smaller gear J, each of said gears being provided withchambers-K K, within which are The elastic ring L has-one end bearing against the radial arm H and the opposite end bearing against the beveled end H of the radiallyslidin pin H, so that as the pin H is crowded radial y outward its beveled end H will press against one end of the elastic ring L, thereby expanding the ring and crowding it against the inner cylindrical wall of the c amber K. Similarl the pin H is crowded against the'end of t e split ring L to connect the gear J with the counter-shaft Fl.

The pressure of the split ring L against the gear J forms a friction-clutch andcauses the rotation of the gear to be imparted to the counter-shaft F. The counter-shaft and sleeves are rotatably supported in the journals 2 2, formed on the base A. i

The pressure of the split ring L in the same manner connects the counter-shaft C and gear J. The beveled faces I I of the concentric sliding spindle I are beveled in opposite directions, so that the lon itudinal movement of the spindle I in one Ilirection will expand the clutch-ring L and connect the gear J with the counter-shaft, and the longitudinal movement of the spindle I in.

the opposite direction will release the gear J and expand the ring L and connectthe gear J with the counter-shaft. The gears J and J are constantly rotated by means of an electric motor M, which has a motor-shaft M, carrying a pinion M engagin a gear N, attached to an intermediate s aft N. The shaft N carries a gear N engaging the ear J on the counter-shaft C. The interme ate shaft N also caries a third gear N attached thereto and engaging the gear 0, which turns loosely upon a stud, the gear 0 engaging the gear J of the counter-shaft, so that the rotation of 'themotorshaftM will rotate the gear J in one direction and the gear J in the verswmotion isgiven to the drill-spindle with' an increase-1n speed during the withdraw'al of the (hill from the-work.

The withdrawal of the drill-spindle is hecomp'l-ished by means of the sliding shippingrod 1 through the medium of the clutching mechanism, by which eitherone of the oppositelydriven-gears J J are connected --wi-th the counter-shaftwi thout reversing the rotation of the electric motor M.

which the counter-shaft F and motor M are connected --is especially adapted to be used iii-connection with an electric motor, itmay, however, be employed when the. motorshaft M is driven by a belt or when other means is employed to drive the drillingmachine than anelectric-motor.

What I claim asmyinvention, and desire to secure by Letters Patenhisv I The combination, with a motorshaft,-of-a hollow counter-shaft,- a-plurality of sleevessecured to the counter-shaft, a hollow radial arm secured to'each sleeve, the sleeves abutting each other and being of slightly-lar er diameter than the :arms whereby shou ders are formed, a gear-Wheel loosel' mounted'on each sleeve and abuttin the s oulders which prevent movement of the gears in one direction, thegears bein recessed, journal-boxes for the counter-sha t and sleeves, theg ears engaging the journal-boxes and prevented 'f-rommovement in the opposite" direction 1 thereby,-expansible rings located within the recesses of the gears, an oppositely-beveled rod slidably received-inthe hollow countershaft, pins cam'ied in the hollow arms and alternatelyengaged by the beveled surfaces of the rod to clutchone-or the other of the gears to the counter shaft, a suitably-support- -ed pinion meshing with one of the loose While my improved driving-mechanism by 5 gears, an intermediate shaft driven in one'di- 'reotion by the motor-shaft, a gear on the intermediate shaft meshing with the pinion, a

second gear on the intermediate-shaft meshi-ng directly with the remaining loose "gear ;and means for reciprocating the -rod to clutch one or theotherof the-loose gears alternately to the counter-shaft. I

4 ALBERT E. NEWTON.

Witnesses:

RUFUs B. FOWLER, -M-. C. PR-10E.

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