US1185875A - Gearing. - Google Patents

Description

W. H. COLDWELL.

aEAmNG.

APPLICATION FILD JA'.. 19, |912.

Patented June 6, 1916.

2 SHEETS-SHEET 1.

4 y mi; m

Il y uf /I f Y l. vnflv y WILLIAM H, COLDVELL, OF NEVBURGH. NEE?? YORK.

GEARIN G.

Application filed January l, 1912,

lie it known that l, Hitman il. COLD- wi-iiiii, a eitixen ot the l'nited States` residing at Neivbure'ln in the i'oimt)Y of Orange and State ot' New Yorin have invented certain new and usei'id lniiln'ovements in Gearing; and i do herein' declare the following to be a iuli, rlear.y and exact description of ha invention, `surh as will eiiahle others skilled in the art to ivhirli it aiiipertains to malte and use the saine.

M v invention consists in the iiovei features hereinafter described .reference being' had to the areompanyineA drawings which illustrate one eliilioiliment of the invention selected by me for the purposes of ili istration, and also a slight moditieaion thereof and said invention is fully ilisi'losed in the i'ollowing' description and Claim.

lie-terrine to the aiceonipainjfinf.,`Y` drawings7 Figure 1 represents a perspective view oi' an embodiment ot' my improvement in Lgearing, as I have applied the same for use in dri ving;r a traction roller. the gearing being inclosed in a rear casing, the rover or losing plate of which is removed. Fig. 2 is a vertical sectional view on line 2-2 of Fig. l looking;r in the direetion oi the arrow. Fig. 25 is a horizontal sectional view on line 3---3 ot Fig. 1. Fig. -l is an elevation of a modification,

The. object oi' my invention is to provide a reversible driving' mechanism, which is specially well adapted for use in eonneetion with a` high speed motor or drivingr shaft and for start-infie heavy loail. provision being made for reducing` the speed of the motor or driving` shaft .by the use prete abiy' of worin gearingr and a slip clutch mechanism being interposed between the driving and driven members to permit a slight slippage in starting' and in rase of extra heavy load conditions, to avoid breakingv or strainingr the parts. I further provide improved means for reversing' the direction of rotation of the driven member without altering the direction of rotation of the driving ineinber, said reversing means being so constructed that it will bring the meshing reversing gears into exactly the proper relation with the driven gear. and further that it will he self locking, that is to say, will maintain itself in whatever position it ma)7 be adjusted to, without the use of auxiliary locking 0r securing means.

In the embodiment oi my invention which I have selected for purposes of illustration Specification of Letters Patent.

Serial No. $772,240*

and which is shown iii Figs. l, i) and 3 0f the accompanying ili'a\-;ii.., i2 represents the driving member, or shaft, which may be the driving shaft oi a high speed explosive engine. or eieeiiie motor or a shaft driven in any desired manner. The driving shaft i2 has its end ireieriiijf fnded into a gear easingl iii. lewin the wall of which is inw-vidal with one ot' the bearings i do not limit in vselt to easing. The drivingr Shaft provided with a wo'rm i3 and enf igiiig the teeth dispos worin wheel .il

a liorisiniiailv mounted ioosrl); on a vertically disposed eoimeetini shaft in and heid in position oy suitable ifoiiars iand H reenred to the shaft. The verti hearings in the .s of the gear easing, and a if'ontiniieusiv engaged Vtriition eluteh is employed for connecting; ilie worin wheel 1i, with the shait 15. in the present instance l have shown a eone match. the female member 20 of which lioriiied with or seemed to the worm wheel 1l. and a male member 2l is mounted on a spline so as to tiirn with the shaft :15 but. to be capable of movement longitudinaliIv thereof. A springl Q2 surrounds the shaft iii and interposed between the maie. cintch member, 2l. 'and a collar Q2 adjust-ably secured to the shaft, thus normali)v hoiding the eliiteh ymembers in frietionai engagement.. hat i-ioiiti,iiig slippage when the toad oven'omes the frictional resistance ot the eiiiirin whirii'iattei' can be varied hv adjiistniy: sion of the spring by means of the oeil;

i2 repre-wht' the drinn shaft. irre represented as the .shaft oi' a trartion ioiiei L a portion ot whieh is shown in the drawing. The shaft is perpendicular to the shaft 15 and extends into .the gear easing;` within which it is provided with a hevel gear, 19. The shaft l5 is provided with two bevel pinions 17 and 1S secured to a sleeve. 16, which is connected to shaft l5 by spiine so as to rotate therewith but eapable of movement longitudinally ot the shaft. The pinions 17 and 18 are iieiei'alily at siieh a distance 4apartthat in a median position of the sleeve neither pinion will engage the bevel geail` i shaft l5 is mounted in f collar, rotatable on but secured to move endwise with said sleeve, the other end of said lever being bifurcated and forming arms indicated at 2l, 24, each of said arms being provided with stop or projection 26 represents an Aeccentric or cam, mounted within the gear case on a short shaft, and located between and with its peripheral surfacein contact with the arms 2l, 24. The cam or eccentric has formed integrally with or secured to it stop arms 27, 27, each of which is preferably lprovided with an adjusting screw 28 adapted to engage the adjacent stop or projection 25. These screws are adjusted to st'op'the movement of the shifting lever in each direction when one or other ofsaid pinions 17, 13 has been placed accurately in mesh with the bevel gear 19, thus insuringA the gearingtmeshing easily without undue wear'or strain.v is the exterior surface which engages the, arms 24.. 24 is circular thelever will be maintained in any position to which it may be adjusted, without the necessity of any extraneous locking or securing mechanism, that is/to say, in the extrcmepositions of tle eccentric 26, the points of engagement of the arms 24,.

24 thereof will be Vin a line with a diameter of the eccentric passing through its pivotal axis, so that the arms will be unable to eX- ertfany influence on the eccentric, which would tend to move the same, and even in intermediate positions of the eccentric, the -sllght' leverage which the arms would-have upon the eccentric would not be suflicient to overcome the frictional resistance of "thepivota-l connection, and that of the actuating mechanism connected with the eccentric.) In other words the reversing mechanism is self locking in whatever position is it placed. The shaft of the eccentric 26 (or the ec- 1 centric itself) is proiided with an operating arm 25) which may be actuated by hand or in any desired manner, and by means of this arm. the sleeve 16 can be moved to hold the . pmions 17, 18, out`of engagement with the ear 19 (the median position) or to, throw either of' said pinions into engagement with the gear, and thus drive thcshaft in either direction. The gear case'is preferably fitted with a cover l1 and is filled with'luln'icant which may be in a liquid or scmisolid condi" `on. thus keeping all the pa its thoroughly iiihricated.

ln Fig. l l have illustrated a slight modification of my invention, in which 12a is the drivingr shaft, having the worin I3 Ngaging the` worin wheel 14 loose on the shaft l5 and connected thereto by the friction clutch members 20.and 2la and spring 22". 2a is the driven shaft provided with the gear 19, all constructed and operating as herctotoro described. in this instance, however,

ltively, and between these clutchmembers is a double clutch member 1G splined. on the shaft l5, and capable of longitudinal moliement. The shifting lever 23 has its yoke connected to the double clutch 1G and said shifting lever is provided with the arms 24, stops 25a, eccentric 2f, carrying arms 27a, set screws 2i a and operating arm 29a all as hereinhefore described with reference to Figs. 1, 2 and 3. f.

It is obvious that other variations may be made in thedetails oflthe construction without departing from my invention and I, therefore, do not limit myself to the exact' details herein shown and described.

`lhe mechanism for shifting the reversi-ng lever herein shown and described is not specifically claimed herein as the same is reserved and will be covered by a separate application` a division of this application.

What l claim and desire to secure by Letters Patent is z- 90 In a driving gearing the combination With i a horizontally disposed high speed driving shaft provided with a worm and a. horizntally disposed low speed driven shaft provided with a beveled gear, of a vertically disposed intermediate shaft provided with a worm wheel loosely i'nounted thereon and engaging said worin, a friction clutch member rigidly secured to said worm wheel, a friction clutch member rigidly secured to 100 said intermediate shaft and' engaging the first mentioned clutch member, a spring normally holding said clutch members in operative relation at a predetermined pressure, a pair of beveled pinions mounted on Said 105 vertical sha'lt for driving the driven shaft in opposite directions, means for connectin" the driven shaft with the intermediate Shaftt through one or other of said pinions to reverse the direction of movement of the 110 driven shaft and a. rotary traction member operatively connected with said driven sha it, whereby the poner ofthe high speed ydriving sha ft may be continuously imparted in the prcseiice of two witnesses.

VV'ILLlAM H'; COLDVETL.

vWitnesses:

L. P. VJHITAKER, E. N. WYATT.

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