US895102A - Power-transmitting mechanism. - Google Patents

Description

I A. E: NEWTON.

POWMRANSMITTING MECHANISM.

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"PATENTED AUG. 4, 1908.

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APPLICATION FILED JULY 5,1993.

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Y PATBNTED AUG.4, 1908..

A. E. NEWTON. 7 POWER TRANSMITTING MECHANISM.

APPLICATION FILED JULY 7,1903.

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APPLICATION FILED JULY '1, 1903- 12.27. 77wi'on. A?) his fltforngyo, W F 64% UNITED STATES PATENT OFFICE.

' ALBERT E. xnw'rox, or WORCESTER,MASSACHUSETTS.

POWER-TRANSLIITTING MECHANISM.

' Application filed July 7, 1903.

T all iclzom it may concern:

Be it known that I, ALBERT E. NEWTOX, a citizen of th United States, residing at \Yorcester, in the county of \Vorcester and State of Massachusetts, have invented a new and useful Power-Trausmitting Mechanism, of which the following is a specification.

This invention relates to a power transmitting mechanism.

The object of this invention is to improve the construction of radial drills and the like, and the improvements especially relate to a construction by which the gearing used for driving and feeding the drillspindle can be conveniently arranged and accurately and economically manufactured.

To this end the invention consists of the parts and combinations hereinafter described and claimed.

Referring to the accompanying five sh ets of drawings forming part of this application for patent, Figure 1 is a front elevation of the radial arm of a radial drill and the parts mounted thereon, showing how certain features of the invention maybe applied thereto. Fig. 2 is a rear elevation of the drill head. Fig. 3 is a side detail view of the reversing gearing looking at the same from the position indicated by the arrow 3 in Fig. 2. Fig. 4 15 a sectional view thereof taken on the plane 4-4 of Fig. 3. Fig. 5 is a sectional view through the upright driving shaft and back gearing therefor. Fig. 6 is a detail View of a friction which may be used thereon. Fig. 7 is a detail view of a yoke orarm for controh ling the same. Fig. 8- is a plan view showing an arrangement of the centers of the feeding mechanism. Fig. 9 is a sectional view taken on the planes 99 of Fig. 8, illustrating the construction of a feeding mechanism. Fig. 10 is a top plan view illustrating the construction of the framing shown for carrying the gearing which makes up the feeding mechanism, and Fig. 1] is a front view thereof.

Referring to the d rawings, and in detail. A designates the usual upright frame, fitted to slide vertically on which is a base-piece B in which is pivoted the radial arm C.

Fitted to slide on the radial arm C i a drill-head D.

A power shaft 10 is arranged concentrically with the pivots of the radial arm, and by means of miter gears drives a shaft 11 journaled in brackets secured to the radial arm.

Specification of Letters Patent.

Patented Aug. 4, 1908.

Serial No. 164,569.

and said shaft passes through friction clutch hubs 13-13, which have keys engaging said key-way. These friction clutch hubs 13-l3 are loosely fitted inside the hubs of bevel gears 14-14. The hubs of these bevel gears 1-1-14 are loosely journaled in brackets or arms projecting from the drill-head, and are held therein by suitable collars. Each friction clutch hub 13 is arranged with a friction clutch in connection with its respective bevel gear, the details of which friction are herein after described at length. Fitting looselv on said shaft 11 is a sliding hub 15 which has tspered ends to engage arms projecting from the respective clutches. Engaging a groove cut in said hub 15 is a yoke 16 mounted on a shaft 17 fitted in lugs projecting from the bearings which carry the friction clutch hubs 1313 and the bevel gears 14'14. The end of said shaft 17 is slabbed and fitted t0 the same is the end of a lever 18 which is mounted on a suitable pivot carried by the drill-head. By means of this lever 18 either friction clutch can be operated so as to engage its bevel gear 14. By this construction the upright shaft hereinafter referred to can be driven in either direction.

Engaging both bevel gears 1-fl-1 is a. bevel gear 19, which is secured on the end of a friction clutch hub 20, which is loosely journaled in a. bearing secured to the drill-head. The upper end of this hub is formed into a cup, and loosely fitting into said cup is a friction clutch 21 which is keyed to the up 1 right shaft 22. This friction clutch 21 core sists of a hub projecting from which is a. circular rib 2?. the end of wh ch is cut off so as to be capable of radial movement.

Fitting into depressions so as to engage the fixed part of the hub and the free end of the circular rib are two pins 21-24. The sides of these pins are slabbed where they bear on each other- Projecting from each of these pins is an arm 25, each of which carries a bearing-head 26 at its free end.

Sliding on the upright driving shaft '22 and keyed thereto is a hub 27, the end of which is tapered and fits in between the bearingheads 26.

When the sliding hub 27 is moved down wards towards the friction, the tapered end of the same forces the arms outwardly. and thereby forces the circular rib radially to engage the hub of the friction clutch, so that turn with the bevel gear 19- i the upright shaft 22 will be-lockcd to and iii This shaft 11 has a key-way cut in the same, l

The same construction of friction clutch is used between the clutch h'ubs 1313 and the bevel gears 1-1-44.

said hub. The drill spindle fits and turns in the usual feed-quill 41, which is fitted to slide up and down in a bearing formed at the lower i Mounted in a bearing secured to the drill- .5 head is a hub '28 wluch has clutch teeth '29.

The sliding hub 27 has corresponding clutch Q the drill spindle can be raised and lowered teeth 30. By sliding the hub 21 upwards,

the upright shaft '22 is locked to said hub 28. I:

may be counterbalanced by a weight 42 Keyed on the hub '20 is a pinion 31, which meshes with a gear 32 mounted on the end of trained over suitable guiding pulleys.

a back-gear shaft 33 which is journaled in a suitable bracketcarried by the drill-head.

On the upper end of the back gear shaft 33 is arranged a pinion 34 which engages a gear 35 keyed on the hub 28. Keyed on the top of the upright driving shaft .22 is a pinion 36. The construction just described forms a back-gearing.

hen the sliding hub 27 is moved down- 3 provided with a clutch -18 by which the worm can be connected or disconnected from the wards, the friction is locked in place and the pinion 36 is connected to turn with the bevel i gear 19. 'hen the sliding hub 27 is raised.

the friction is disengaged, and the continued j and the clutch 48 18 provided with the usual movement thereof locks the clutch teeth and 30 together. position, power is transmitter. o the pinion 31. gear 32, shaft 33,. pinion 34 to gear 35. and as the gear 35 is secured to the hub 2S which is now locked to the upright shaft 22 When the parts take this the pinion 36 will be driven through its back jj spindle can be quickly raised or lowered. By leavin the handles in their normal position, ant by turning the feed-wheel 47, the

gear train at a relatively slow and powerful speed compared with the speed when the power is taken directly up to the upright shaft 22.

I have found itto be a. most advantageous 1 construction to use a friction clutch when clutch is most desirable to take the heaz strain due to the increased leverage of gear nig down.

' which is the usual pinion (not shown).

part of the drill head. The feed quill 41 has a key-way out therein fitting a key inserted in said bearing in the usual manner, so that in the customary way. The drill spindle which is connected thereto by a chain The feed quill 41 has a feed rack -13, engaging On the end of the shaft of this pinion is arranged a clutch 44 which is formed inside of a worm wheel 45. Engaging this worm-wheel is a. worm 46 mounted on a shaft. which is provided at its lower end with the usual feed wheel 47. The upper end of this shaft is power feed shaft 49. The clutch 44 is provided with the usual operating handles 50,

operating connections 51. The details of these parts are not shown and described at length, as they form no part of this present invention, and as the opera-tionof the same is well understood, and is as follows :By pull ing out and turning the handles 50, the drilldrill-spindle can be fed up or down accurately through the worm and worm-wheel. By manipulating the operating connections 1 51, the clutch 48 can be thrown in or out as desired, so that the drill-spindle can be fed by power or disconnected from the power feed. The gearing and connections by which the said feed shaft 49 is driven forms an importaut part of this invention.

It is necessary to have said feed shaft so geared that it can be driven at different speeds, so that the different feeds can be'obtaincd for the drill.

The sliding hub 27 has a groove cut in the 5 same, and engaging the same is a yoke 32' winch can be actuated by a handle 33 pivoted to the drilll:ead, so that either train of I gearing can be used as desired by the oper ator by simple manipulat'ion of said han- 1 tile 08. t

It. is also an advantageous construction to -use two arms 2525 to cooperate with the siidin taoered hub '27 as bv having the Z) I bearing points of said arms diametrica ly opposed, all tendency of the same to cramp or slip on the shaft 22 is eliminated.

The driving pinion 36 engages a driving gear 39, the hub of which is journaled in a bearing formed in the upper part of the drili head. The drill spindle it) fits in this hub, and has the usual key engaging a keyavsy tn in manufacturing drills in large quantities, It has been found desirable to arrange this gearing so that it can be assembled and put together on the bench separately from the planed off to the same level for the brackets The bracket 56 is 56 and 57 respectively.

The

provided with two bearings 58 and 59.

. end of the feed shaft 4:9 1s journaled in the 'outer of said bearings.

An intermediate shaft 60 is journaled in the other bearing 58, and in the bracket 57. A hub 61 is formed on the bracket 56 concentrically with the bearing 58. Fitting on this hub is a swinging bracket 62 which has a hub 63 at its end, journaled in which is a shaft 6-1. The feed shaft 49 has securedthereto a series of gears 65, 66, 67 and 68, which mesh with a series of inions 69, 70, 71 and 72 loosely fitted on the ower end of the shaft 60. The lower end of the shaft 60 is bored out, and fitted in the same is a sliding shaft 73 which carries a spring-pressed key 74 which projects through a slot cut in the shaft 60. Each of the pinions on said shaft 60 is rovided with a keyway into which the said key 74 can engage. The shaft 73 is provided with a handle or button 75, and with a friction 76. A in is arranged in the shaft 60 on each dividing line between the pinions, and the head of the key 74 is tapered as shown, so that as the sliding shaft 73 is pulled down or pushed up, said key will ride over said pins. By this construction any one of the four pinions can be locked to the shaft 60.

A gear 77 is secured to the top of the shaft 60 and meshes with a pinion 78 secured on the top of the shaft 34. On the lower end of the shaft 64 are loosely arranged "two gears 79 and 80. The shaft 64 is bored out, and fitting in the same is a sliding shaft 81, which has a key 82 which projects out through a slot cut in the shaft 64. A handle or button is arranged on the end of the sliding shaftSl and a suitable friction device 84 is provided for said slidin shaft. A pin is arranged in the slot of the shaft 64 on the dividing line between the gears 79 and 80. By sliding the shaft up or down either gear 79 or can be locked to the shaft 64. The gears 79 and 80 are meshed with the gears 52 and 53 secured on the hub of the driving gear 39. By this construction power is taken to operate the feed shaft 49 through either gears 52 and 79, or 53 and 80, as the case may be, to turn the shaft 64, and by pinion 7S and gear 77 to operate the shaft 60, and then by the )inion which is locked to the sha ft 39 through its intermeshing gear to turn the feed shaft 49. This "caring for driving the feed shaft is comparatively complicated. It can be best assembled and put togeth r on the bench, but the difficulty has arisen in doing this that it is hard to fit this gearing after assembly to the drill-head. This difficulty is overcome by the arrangement of brackets before described. After this gearing is assembled on the bench, the brackets 56 and 57 are secured on their respective planing spots, only one alinement being neces ary. and that is to get the end of the feed shaft 49 properly in its clutch-head. After this has been done and said brackets secured in place,'the swinging bracket 62 is turned and i set so that the gears 79 and 80 will properly mesh with the gears 52 and 53. The swinging bracket 62 is preferably split, and 1s pror sition.

vided with a tightening bolt 35 by which the same can be tightly clam )ed in adjusted o- A pin 86 is usualfy driven throng 1 a. projecting wingon said bracket 62 to lock the swinging bracket additionally to the bracket 56 after the same has been adjusted in position. the hole for the )in being drilled after the gears are properfy meshed. B this arrangemen this feeding gearing whic is properly propv tioned for e' i1t differen speeds for me d--ll spindle can lue quickly as embled on the bench, and can be rapidly and accurately put in position on the drillhead. This is a very imporL-int point in ractice as it greatly expedites the manu acture.

The radia usual rack, ines ith which is the usual spiral pinion carried by the drill head and operated by the handle 87, whereby the drill-head can be adjusted longitudinally of the radial arm- By the constructions before described, the operator has the reversing mechanism, the back-gearing mechanism, the different arrangements of the feed, and the position of the drill longitudinally and radially at his command withour leaving his position.

The details and arrangements of parts can be worked out in other ways to accomplish the ends cf my improvements without departing from the scope thereof expressed in the claims.

Having thus fully described my invention, what I claim and :des' 'e to secure by Letters Patent is a 1. In drill construction, the combination of a drill spindles power driven: hub, a shaft, means for Imnsn ting power from the shaft to the spindle, means for gradually and frictionally connecting the hub with the shaft while the hub is rotated to drive the shaft directly from the hub at a high speed, means detachable from the shaft for tmnsmitting power from the to the shaft at a slow speed, and means for connecting said power transmitting means positively with the shaft.

2. In drill construction, the combination of a drill spindle. a shaft, means for transmitting power from the shaft to the drill spindle, a oowertlriven hub. a friction clutch for directly connecting said hub with the shaft, a second bub loose on said shaft, :1 back-gear train camnecting said hubs, whereby power may be transmitted from the first hub to the second hub at a reduced speed, and means for simultaneously isconnecting said friction clutch from the ti 1 hub and connecting said second hub positively with the shaft- 3. In drill construction. the cmnbination arm: C is provided with the of a drill head having two planin spots, two

brackets adapted. to be attached so the planmg spots. said brackets havrrg bearings 1n alniement for a shaft, and one of said bracle &' 895,102

ets having a hub concentric with said bear- I ings and a second bearing, and a swinging bracket centered on said hub.

4. A feed gearing comprising a removable bracket having a bearing, a power transmitting shaft iitted therein, a hub formed on said bracket concentric with said bearing, a swinging bracket fitted on said hub. a shaft 'ournaled in the end of said swinging racket and gearing between said shafts, whereby the parts may be assembled before the bracket is mounted in position on the machine. 7

5. A feed gearing comprising a removable bracket having a bearing, a power driven shaft "fitted therein, a hub arranged on said bracket concentrically with said shaft, a swinging bracket fitted on said hub, a shaft journaled in said swinging bracket, gearing arranged between said shafts and means for locking the swinging bracket in adjusted position.

' 6. A feed gearing comprising a bracket provided with bearings, a power transmittmg shaft and a feed shaft htted m sald -bearings, a change speed gearing between said shafts, a hub formed on said bracket concentrically with one of said shafts,- a swinging bracket fitted on said hub, a shaft jouiinale'd in the end of said swinging bracket 40 concentrically with said shaft 60, a swinging bracket 62 mounted on said hub, a shaft 6- journaled in said swinging bracket, and gearing between the shafts 60 and 64.

S. In a feed gearing, the combination of the bracket 56, the feed shaft 49 journaled 50 a swinging bracket 62 fitted on said hub, a-

therein, the shaft journaled therein, a change speed gearing arranged between said shafts 49 and 60, a hub 61 projecting from said bracket concentrically with the shaft 60,

shaft 64 journaled in the end of said swinging bracket, gearing between the shafts 60 and (H, gears 79 and S0 loosely arranged on the shaft 64, connections whereby either gear 55 may be thrown into engagement with the shaft 64, drifing gears 52 and 53 engaging gears 79 and S0, and means for locking the bracket 62 in position with gears 79 and S0 properly in mesh with the gears 52 and 53.

c0 9. in a feed gearing, the combination of a bracket, a feed shaft journaled therein, a sec and shaft jonrnaled in the bracket. a change speed gearing mounted between said shafts, a hub projecting from the brat-kc: concen- 5 trically with the second .sl-eft. a swinging bracket finned on said hub, a third shaft journaled in said swinging bracket, gearing be tween the second and third shafts, a plurality of gears loosely mounted on the third shaft, cpnlnections whcreb y either of the gears on the; third shaft may be thrown into engagemen: with said shaft, driving gears engaging saidl gears on the third shaft, and means for Hocking said swinging bracket in position with said gears properly in mesh.

10. In a feed gearing, the combination of a bracket, :1. .s-saft journaled therein, a swinging bracket jo'urnaled on said first named bracket co-ncentrically with said shaft, an

additional shaftjournaled in said swinging so -l)lacket,'ge:aring between said shafts, gears loosely arra-11ged on the additional shaft, connections wfnereby any of said gears may be thrown illilw'l engagement with said shaft,

driving germs engaging said gears, and means for locking she swinging bracket in position with the properly in mesh.

'11. A fee. gearing for drills consisting of a bracket carn ying a change speed gearing, and

an adjustafnle bracket mounted thereon carrying part of said gearing and arranged so that the same can be adjusted without destroying tine mesh of the gearing, wherebyall of said gearing can be assembled on the bracket anrll then said bracket can be secured to the drill head and the adjustable bracket set to meslii the change speed gearing to the gearing caazaied by the drill head.-

12'. A fac d gearing for drills comprising a.

bracket cac' "ring a change speed gearing, an 0 bracket for driving said'change s )eed gearing arrange-d so that the same can e adjusted or swung without destroying therncsh of the gearing. whereby said bracket can be secured t0 tine drill-frame, and the adjustable bracket sea to mesh the gear to the gear which is to drive the same. 14. In a clrillingmachine, the combination of a bracket haying two integrally formed hubs, a change speed gearing arranged between saic"; hubs, a swinging bracket con:

centrically mounted on one of said hubs, gearing can ied by said swinging bracket, and means for locking this bracket at adjusted position- 15. The combination of a bracket having aging bracket in adjusted posi- 105 two integrally formed hubs, a series of gears i *In testimony whereof I have hereunto set 7 arranged between said hubs, a swinging my hand, in the presence of-t-wo subscribing I. bracket mounted on one of said hubs, means jw itnesscs. carried by said swinging bracket for trans- 1 nut-ting power to the series of gears, and Vibnesses: means for locking the swinging bracket in ad \LOUIs \V. SOUTHGATE,

I V ALBERT E. NEfWTON. 'f-

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