US870502A - Crank-shaft. - Google Patents

Description

T. I. PAY z J. M. ELLSWORTH.

CRANK SHAFT. APPLICATION ILBDAPR. la. 1907.

2 SHEETS-SHEET 1.

.mimi

ATTORNEYS No. 870,502. PATENTED NOV. 5, 1907. T. J. PAY L J. M. ELLSWORTH.

I ATTORNEYS crank shafts, and more particularly to sectional or l THOMAS J. PAY, or NEW YORK, N.

Toall whom 'it 'may concern:

Be it known that we, THOMAS I. Fav, a resident of the city of New York, borough of Brooklyn, in the county of Kings and State of New York, and JOHN MAGEE ELLsWoRTn, a resident of Bernardsville', in the county of Somerset' and State of New Jersey, both citizensof the' United States, have invented anew and Improved Crank-Shaft, of which the following is a full, clear, and exact description.

This invention relates to certain improvements in knockdown crank shafts adapted for use in connection with engines, compressors, and the like, and the object of the invention is lto so construct the device that the shaft may be made ofthe minimum length and the ball bearing support thereof may be brought -as close I to the throw as possible.

A further object of the invention is to provide a crank shaft having a sectional hub, the sections of which separate upona plane at an langle to the axis of rotation, and said sections being so connected together thattbe rotary movement of one section in respect to the other is prevented by 'a plurality of small locking members and the longitudinal movement of one section in respect to the other prevented by means of suitable clamping mechanism.

A further object of the invention is to provide means whereby one'rotatable member may loe-held rigidly secured to anotherrotatable member `and the resistance to rotation distributed uniformly among a plurality of bearing surfaces.

AFor securing the objects above referred to, We provide the opposite meeting faces of the adjacent sections With a plurality of conical recesses having double taper buttons floating therein. In forcing the sections together, each of the buttonsis free to move lon, gitudinally so as to engage within each of its recesses with equal pressure and is of such a size and shape that it becomes firmlywedged in each of its recesses 'W ien the sections are brought into contact. .'lhus, itis im` possible for ne of the buttonsto be in firmer engagement with on'e'section than with another, and it is also -impossible for any of the buttons to4 fail to be forced into place. Each and all of the `buttons receive anA qual'amOUn't of `lateral strain when one yof the mem,S bers is rotated, Were separate clamping bolts ein` ployed, it would be impossible to attain such mechan-A Specification of Letters Patent. Application filed A'pjril 8,1907. Serial No. 367,'025.

AND JOHN MAGEE ELLSWORTH NEW JERSEY.

, OF ll'lRNARDSVILLE,

' naaien-SHAFT.

Patented; Nov. 5,7 1907.

impossible for any one button to receive-anyA more lateral strain than is borne by each of the other buttons. I V

A further object ofthe invention is to provide a clamping means for holding the sections in engagement with each other, which clamping means may also be employed .for separating the sections when it is desired to take thc structure apart. For securing this object, we provide a centrally disposed bolt hav-Y ing an annular iiange intermediate its ends and adjacent the meeting surfaces of the two sections, whereby uponmoving the bolt longitudinally in respect to one of the sections the other section may be forced out of engagement with the first mentioned section in a manner hereinafter more fullygset forth.

The invention consists in certain features of construction and combination of parts, ,all of which will be fully set forth hereinafter and particularlyi pointed out in the claims. l l

Reference is to be'had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in both the figures, and in which Figure l is a central vertical section through a portion oi a multi-cylinder engine provided with ourim proved crankshaft; and FigA 2 is a vertical transverse section on the line 2-'2 of Fig. l.

To more clearly illustrate the construction and operation oi our improved crank shaft We have illustrated a portion of an engine having a pluralityoA cylinders l0 connected to a crank case l1 of any suitable character. v The crank pase is preferably made up of upper and lower sections, and the portions of the crank are sub-divided into chambers'corresponding to the separate cylinders b-y means of the hubs of the crank shaft rand the supporting bearing therefor'. rlhe crank shaft .is made up of a plurality of sections, and each section preferably comprises a pin l2,y crank arms 13A integral therewith, andv hub sectionfrll idtegralwiththe crank arms. The crank pin l2 serves to support a'piston rod i l2?- laving a separable bearing portion 12b of any suit- 'able construction. The hub sections 14 unite. to form Athe h ub of the crank shaft and are provided with means ,for securing the same together and means for rotatably mounting the same. Asillustrated, each hub is made up of two oppositely disposed hub sections each supporting its crank a'rm, said sections Ahaving their adjacent faces meeting upon a plane a't right angles to the `axis of rotation. Within these ymeeting faces We proroo vide oppositely disposed axial recesses which tog ther A The holt 16 and its flange 'l5 serves as means whereby the sect-ions ina bel'orced apart. This is accomplished by first removing; the crank from the engine and then inserting a spacing inernber between the two crank' of onel section and contacting with one oi the nuts The nul, on the opposite end of the san-re boltis he nut in conigact with the spacing ineens he ni; is held from longitudinal moves caused tu niove endwise, and the ilange n ging with the opposite hub section forces the latter ont ei Contact wirfn the .first mentioned one and dran ch o the buttons out oi one of its recesses.

Within the contacting face of each or' the hul; sections 'We provide a plurality of conical recesses, prel`e1- ably six in number and arranged eoncentrieally in re spoot tothe loc ing bolt 16. The recesses of one hub section exactly correspond with the recesses oi the adjacent hub s ctior., and within these recesses We provide a plurality oi small metal dowel buttons i8 in the forni of double truncaled cones and having exactly the same taper the recesses in title hub section. lhe do burrone are preferably' slightly shorter than the combined depth oi the oppositely disposed recesses but are of such a that they become tightly wedged in place Within .r `li rec-csic. when the hub sections are forced trgrgeiher. in Y order lo accommodate lor any slight in uount oi instal displaced or shaved off by the orcing of the buttons into their recesses, we provide each of the recesses With a slightly beveled edge l!) which forros a ver-y small. annui-ar recess around the lbutton at its greatest diameter. This recess is shown in the drawings upon o. slightly exaggerated scale to more clearly disclose th' rue.

ln bringing 'the sections together, the floating dowel buttons lree to move longitudinally so as to engage. rifle Walls of the opposed recesses with equal pressure at all runes, and the buttons are of such size in respect to .J hat they engage the Walls of the recesses belore the meeting surfaces o the sections contaetwA The sections are their forced into firm engagement and of the iuttons become wedged in place, any metal shaved or aped oli entering tho recesses 19. Thus ions in. v.ize of the recesses or the but4 ns which ne in at accurate workmanship cannot noi. es e any one button to bear more 'ted than is sus Y when, and no button e the recess ol one section Awithout #li exactly equal pressure the opposite rei .if th:- otlnzr s.' tion. No button can po. iywork n even and liiorin distribution ol the latisl secured. The recesses are pre'erably spaced a uniform distance apart, whereby the angular edjnstnien. of the cranks may be variedat will denecting means above described is especially apparent 'when it becomes necessary to vary this angular adjust n new'and di ment. Were bolts or other clamping means employed, it might be mechanically possible to so space the holes and arrange the bolts whereby the strain could be uniformly distributed among the several bolts, yet when one shalt is adjusted to a definite angle iu respect to the adjacent shaft different openings are brought opposite to each other and the perfect alinement which may have been possible before may be thus destroyed. By connecting the parts in accordance with our invention, the slight inaccuracies in construction impossible t avoid are remedied by the Wedging action of the buttons they are forced into place, and the equal distribution o the strain is secured irrespective oi whether or nel; the recesses are specially bored for one particular annular' adjustment 'of the cranks.

The outer circumferential surface ol' each hub section preferably cylindrical in form and provided with an outwardly directed flange 20 serving te rigidly hold in place an annular race ring 2l .for the series of balls 22 constituting' the ball bearing. The crank case supports a similar race ring 23 .\and the balls may be in sorted and spaced in any suitable manner. vAs illustrated, We provide a plurality of telescoping spacing members 24 a provision which by holding the raceways 2l and 23 eccentric, in respect to each other and collapsing each spacing,r member to the limiting amount, permits of the insertion of the'balls and the spacing members and permits of their adjustment t0 the position shown in Fig. 2 to positively prevent the accidental -escape of any of the balls.V .lt is, of course., understood that the balls may be secured and spaced by Various other means7 as that shown constitutes no portion oi our invention. i

Supported by the crank case and adjacenteach of the race rings 23, means for retaining oil or other lubricant within the bearings is preferably provided. ils shown, th means comprises two oppositely disposed annular plates 25 lying substantially parallel and closely adjacent the opposite sides of the race rings 2l and 23. each plate being held in place by a cylindrical portion 2G terminating in an aunularange 27 secured between the race ring 23 and the supporting 'crank case. These plates 25, lying closelyadjacent the ball bearing lon opposite sides, serve to effectively subdivide the crank case into4 separate compartments, yone for each crank and piston, whereby the crank case may be used as an air or explosive mixture compression chamber, as is common in two-cycle engines.

Having; thus described our invention, we clair'n as ,e to secure by Letters .Patenti haft made up ol n. plurality or sections havurfuces 'zrcinc uch other, said surfaces being prowltn oppositey disposed recesses and rlowelbuttons .sr-ated wltlzin ld recesses betont olf engagement with lthe lxolilolns lin l il crank shaft runde un ol' n plurality of sections havc, .surfaces facing each other, said surfaces being provided with onpusil'ely disposed recesses :and tapered dowel buttons wlllln Suid reve..

bringing r he sections rogerlier.

Il. A crank shaft: inode up ol n plurality `of sections having: surfaces facingewli other, said surfaces belng pro vided with opposltely disposed tapered recesses and tupered duivel buttons Within said recesses,` 'and seated and l. A cran lnc centered hy the bringing of the sections together;

s, sented und centered by the vided with an annular rowcf recesess and a centrally dlssconce posed passageway, a plurality of dowel buttons seated within said recesses, and a centrally disposed bolt extending through said passageway.

5. In a crank shaft, a hub made up ofla plurality of sections meeting in a plane at an angle to the axis ot' rotation, the meeting faces of the adjacent hub sections beiner4 provided with a plurality of pairs of oppositely disposed recesses, a button located within each pair of recesses, and means for locking the sections together.

(i. In a crank shaft, a hub made up of a plurality of sections, the meeting faces of said sections being provided wit'li a plurality oi pairs of oppositely disposed recesses, buttons located within each pair of opposed recesses and adapted to ioat to positions of equal pressure, and an axially disposed bolt rigidly securing said sections together.

7. In a crank shaft. a hub made up ol separate sections, the meeting surfaces'ot' said sections heini,r provided with oppositely disposed conical recesses, a plurality of double conical buttons located within said recesses, and lan axial bolt rigidly securing said sections together.

8. A crank shaft made up of a plurality of sections having the meeting faces thereof lying in a plane at an angle to the axis of rotation. and each of said meeting' faces being provided with a plurality of conicalirecesscs4 and means lying within said recesses and in engagement with the oppositely disposed sections for preventing rotary movement of one section in respect to the other.

9. A crank shaft made up of a plurality of sections, each of said sections having a recess in the face thereof, and a locking bolt bavini,r an annular iange in engagement with the recesses of the adjacent faces, and having lockingr nuts at euch end thereof.

l0. A crank shaft made up of a plurality of sections, each of said sections having a recess in the face thereof, and a locking boli having a projection extending into the recesses of the adjacent faces, said locking bolt serving to hold the sections in engagement with each other.

1l. A crank shaft made up of a plurality of sections, and a locking, bolt for holding the adjacent sections in en gagenient with each other, said bolt being provided with means adapted to engage with the sections, whereby they may be'forced out of engagement with each other by the longitudinal movement of the bolt.

l2. In combination, a ball bearing including n race-ring having an outer circumferential bearing face, and two cranks each having a hub portion extending: into said race ring iroin the opposite ends thereof and engaging.l with the race ring,r to prevent movement thereof in the line of the axis of rotation and the inner ends of said hubs facing each other and lying in planes substantially at right angles to the axis tif-rotation.

13. In combination. a ball bearing having a race ring having an outer circumferential bearing,I face, two cranks each having a hub portion extending into said race ring from the opposite ends thereof and engaging;- with the race ring to prevent movement thereof in the line vof the axis of4 rotation, und fricrionally engaging therewith to prevent the rotation thereof independent ot' the hub portonspand the inner ends of said hubs facing each other and lying in planes substantially at right anales to the axis of rotation, and means for securinl;l the simultaneous rotation of said hub portions,

14. In combination, a plurality of cranks, each having two hub portions and the hub portions of thc adjacent cranks lying in planes :it right ang-les to'the axis of rotation, a ball'bearing common to said adjacent hub portions. said bearingr including a 'race ring surrounding the hub portions in the piane of the opposed faces, and means for r idly securing, together the hub portions ot thc adjacent cranks the hub portions being constructed to bind the race ring in piace under the influence ot' said sccurinp; means.

l5. In combination, n plurality of cranks. each having two hub portions. the hub portions of the a-.ijacent cranks having opposed faces` lying in planes at right angles to the axis of rotation', meins for securing the simultaneous'rotn tion of the cranks, and a. ball' bearing common to both hub portions, said bearing including a race ring surrounding the adjacent hubs and held by frictional engagement from rotation in respect to' the hub portions. i

16. A crank shaft made up oi" a plurality of sections, each section terminating in a face lying substantially at right angles to the axis of rotation of the shaft and ndjacent the face of a similar section, independent and detacir able fastening means cach in engagement With both of said sections, one of said fastening means serving to p longitudinal movement ot' one section. in respect to the other and the other of said fastening means beingr disposed within said sections and serving to secure the simultaneous rotation of both sections, and a ball bearing surrounding the said sections in the plane of the opposed faces.

1T. In combination, a plurality of cranks, each having two hub portions, the hub portions of the adjacent cranks having opposed faces lying in planes at right angles to the axis of rotation, means for securing the simultaneous rotation of the cranks, a ball bearing common to both hub portions, said bearing including a race ring surrounding the adjacent hubs, and a locking' bolt extending through the adjacent hubs for locking them together` said hub portions being:I provided with means for binding said race'ring in pince under the influence of said locking ho lo. in combination, a plurality of crank; two hub portions, the hui portions oi the adjacent cranks facing; each other in a pinne at right angles to the axis of rotation, and each bovine an annular flange, n e ringsurrounding said hub portions and between said ilanges, and means for rigidly securing together the adjacent lub portions and simultaneously binding said race ring in place between said flanges.

10. A device of the class described comprising a plurality of sections each having a plurality of conical reY cesses in its meeting face, and a plurality of double conical buttons adapted to trictionaliy engage with the walls oi? said recesses without contacting with the Abottoms thereof, and be forced into place by tbc bringingl together' of the tions, said buttons being iongitudinally movable to ioat` to positions of equal pressure.

Bil. Adevice ot' the class described comprising a pluraliiyof sections cach having; a plurality of conical reY cesses in its meeting face, and a plurality of double conical buttons adapted to iioat to positions of equal pressure within said recesses without contacting with the bottoms thereof when said sections are forced together.

21. A device of the class described comprising a plurality ot' sections each having a plurality of conical recesses in its meeting face, a plurality of double conical buttons adapted to frictionally engage with the Walls ot said'recesscs without contacting with the bottoms thereof. and be forced into place by the bringing together et the se@ tions. said buttons ,being longitudinally movable tdiioai to positions ot equal pressure, and a clamping bolt havin' a projection adapted to en ige with one of' said sections for forcing said sections apart.

22. A. ldevice of the class described comprisins,j a pinA rality of sections each havingl :i plurality ot' contrai recesses in its meeting tice. a plurality oi' double con' a! buttons adapted to iioai to positions of equal pressure ithin said recesses without contacting with the bottoms thereof when said sections are forced together, and a clamping bolt having a projection adapted to engage with one ot' said sections foil forcing said sections apart.

In testimony whereof' we have signed our mines to this specification in the presence of two subscribing;- u'iini, sses.

THOMAS .'i. FAY. JOHN MAGICIG ifLLSVifUit'ii-f.

Witnesses:

Cmvi: W. Fainniimi, riviere-ino B. MARSHALL.

each having

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