US1657165A - Double-drum hoist - Google Patents

Description

" Jan. 24, 1928. 1,657,165

E.B. LEAR DOUBLE DRUM HOIST Filed July 15, 1926 y Af ' 1 2 v I INVENTOR. eer

Paienfed Jan. 24, 192s.

l UNITED STATES "PATENTKoF FICE.

EARL .'B. LEAR, OF PHILLIPSB'URG, NEW JERSEY, ASSIGNOR TO INGERSOLL-RA'ND COM-l i PANY, OF JERSEY CITY, NEW JERSEY, A CGRPORATION OF NEW JERSEY.

DOUBLE-DRUM HoIsT.

`application met July 15,

This invention `relates to double drum hoists of the type in ywhich one drum or the other is automatically "connected to be driven from a reversible motor in accordance with the direction of rotation of the motor.

The object ofl the present invention 'is to enable `a double ended rocking pawl or clutch member to be finounted on a main driver located at one end of one of the drums so that the pawl may rock through a plane offset from and paralleling theaxis of ro'- tation of the drive shaft. Otherobjects will appear hereinafter. yThe invention is illustrated in one of its preferred forms in the accompanying draw- 1ngs,inwhich Figure l isa sectional elevation of a holst, Figure 2 is a transverse sectional elevation taken 'through Figure 1 'i on the line 2.0 2 2 looking in the direction of thearrows, and i Figure 31s a plan view` partly ,in section taken through Figure 2 `on the line 3``3 looking in the direction of the arrows.

Referring to the drawings, A` designates a base plate of the hoist on the opposite ends of which are/mounted end frames B and C. The end frame C in this instance also serves as a housing for a motor D of thefflat piston type, sometimes called the ",Dake motor.

The invention, however, is not confined to Y 0 extends coaxlallythrough the center" bearthe particular'type of'motor illustrated and any suitable reversible motor may be sub-y stitued therefor. In this Vinstance a valve chest E secured to the end frame C by means of suitable bolts F serves as avclosure for one side of the motor D.

Pressure fluid for'actuating the' motoi-D is conveyed to the valve chest E through a connection G and the distribution or admission of such pressure fluid to the motor may be controlled by any suitable valve `(not shown), intended to be actuatedby-a reversing lever I-I.v The frames B and 'C in other and in addition a substantial Abearin is provided by the center bearingfor a hau age drum P and a tail rope drum Qmounted side by side. An extenslonR is formed on of any well known `type which` interlock "with similar clutch teeth T carried by a this instance are braced at their upper ends by a tie rod J which extends through ythe 192e. serial No. 122,676.`

and are screwed into the ,plate O.` By thus securing the center bearing L in the manner described, the -frames `B and C are rigidly supported and braced with respect to each the haulage drum P and has clutch teeth S sleeve 'U of a toothed drum driver `V` for `transmitting rotary movement of the said drunidriver to the drum l?. Y The sleeve -U of the 'drum driver V is in this instance of l70 the same external diameter as the extension R wherewith it cooperates to form 'a full bearing for the tail rope drum Q.

Suitableimeans are provided for checking Y or retarding rotation of the drums whenever one drum or the other `of the drums is disconnectedfrom the driving element. `To `r this end the drum Q, is provided with an annular lateral flange W and the drum .P`

has a flange Y on which arel mounted brake bandsfZand b. The brake bands Z and b are referablyof the type which encircle the anges W` and Y and maybe manipulated in any suitable and well known man ner. f

y y In the present instance a main drive shaft ing L and is connected at one end to the the drive shaft c is supported in the end of l the center bearing by an anti-friction bear?` y ing e. A similarr anti-friction bearing is also provided forthe drive shaft c forthe` end of said drive shaft adjacent the motor. To the outer end of the drive shaft o is keyed .a driving pinion f which is rotatable in a gear box g in the frame B and meshes withan intermediate gear la. mounted on a n shaft The shaft y' in this instance is provided atits endsy with anti-friction bearings is ando supported by the frame'B and carries at its inner end a pinion p which meshes with `an internal gear g of a main driver o'.

In accordance with the present invention a bearing s is formed on the main driver 0?105 y 'pawls instancebeing .adapted to rotatecin the saine transverse plane."` "On the oplosite sidesof the bearing .s are arranged pawl members u and o." These members" are preferably ot' symmetric al `torination and `are arranged to" extend inoppcsite `directions so that-"- Athe i paWl is in ei'ect a double ended pawl.` `lllese pawls are preferably held in assei'ribled`po-` sition and pivoted on thebea-iing;as byiafbolt w which extends therethrough and is provided uwith d a suitable.mnt-mm1whereby the d e and tver@ @lampedinniesition. Alhe i, bolt `fw =is preferably disposed radially with respect to theclongitndinal axis oit the `main driver r, so `:that i the paivls fia and y a; will oscillate in `planes- `parallel with trespect to d This adds `to the expense of maintenance of thelhoist and at times greatly interferes with the service for the reason that such parts are not at all times readily available. By form- :ing the pawlmembersseparately the `present instance, fthese Allmembers may in terchangedone for the other m case one of the paivls show signs ot greater wear than the other, `or avneimpawl may be substituted for the worn paivl.

I.clai1n: l t Lln alhoist, the combination of end` trames, a centerl thearing *sngportedby the end trames,ca drive shatextending through i the center bearinga i reversible lmotor for rotating the `drive rshalde pair of drums each Vother :and with; respect tothe iaxisiojf rrotatable `relatimel-l1v tothe drivershaft, conl rotation ofthe niainlriver. i L

In order'to irrevntirelatve armement betweenthetpasvlsm/and rv andthe bolt/mikey i slotsfy are formed inithe pawls tobooperate With'lreyse` seatedin the bolt w. The bolt of w in l this instance extends radially from .the i drive shaft 'a and iinfthis @may the 1lgaWl-swia and v .are caused to'l oscillate in i aplane offset from and paralleling, the l aident-rotation ofwthe drive shaft.` f 1 i z In the operation otvthe hoist, detiitfbe assumed,j` that it` be, `desired ,to "conneatthe haulage drinn P to be Hrotatedibygtheinaindriver R; fllheleverfHCi and consequently it the throttle ,val-ve may then tbe moved to Aa position for actuating the i motoria; the requiredI direetionrin thisilistances ini a clock: Wisedirectionas Figurebl lis viewed jfrom Vthe right, The maindriver r Wllthendneq togthe train Aof gearingywhich-eonnects it with thedriving shaft @.fbe caused to rotate in a counter-elocltwise directionthns causing .the patvl o to engage one of the teeth of the f drnmfdriver VY and thedrinnfrltwill remain interloclred with;` the anainwdritcer `until `xthe motorlis again reversed. Upon reversal olii; the i throttle ilever "H and t consequently the u motor t `the kniain driver Will; ,be eansed to lrotate in the l; opposite `direction toirotate the drum Q- The: rerrsel the Beatle driver will cause the 'pawlo-to beaforcedout 1 of .engagement from the drinn, dri-verV and the pawlfuf Will he simultaneonslyicom nected With ,thedrum driverz'carried bythe" tail {ropedrnin i C In hoists otthis type,` infrequently hap` pens,` thaty (meot the pavvl members issnb-i o jectedto `greater mear than the'otliervpawl member, sothatiat times, :depend-ing npon i their@ 0f WW1 asedii beco1nels`aeeessary; to discard the entire `p avvl i althonghflonepor'- L tion "thereof )night be "capable of rendering service "tor a considerably greater length of t-irne.` Owing Ato thedact,` fhovverehdhat there has ndprovisionbeen made to :permit i such pawls to *be `reversed in theNhistft-he entire Apavvl assembly will d have -tofbe dis-` carded and a neivpavvl substitntel'therefor;-

i centrically arranged .i drum drivers-associated 1 i i with the drains, i said idx-'nm `drxvers rotating in the :same transverse plane,` a,` ymain driven B5 i rotatable ion the center bearing canneeted@ to be rotated by the drinteaha'ft,andraldouble` ended 1pawl carried Yby `T`the `main Adriver l to i engage one or :the i other uofthe-drain in accordance avith the `direction of rotation 90 i of the said main driver, said pawtoseillating i about .an axis radial to of the drive i shaft.

i2. ln, 1a hoist, the 'coinbination `.oflenlcl `.the axis not' rotation frames,a `reenter ,bearing supported the "l end frames,` a drive shaft extending' through ,the centerbearhigng, .aureversible `:motor yfor rotatin thelrlve shaft, aj airotdrnrns rotatab e relatively :to .the .drive Lshaft, con-i `centricallyjarranged `drum drivers. associated with the drninsVsaiddruln drivers `.beingfloi catedat one endotithe drumsandadapted i to "lrotate inthe .same transverse plane," a main driver rotatable `on Mone end ot the .cen-i ter bearing .connected tobe rotated hy the" `:m6 drive shaft, a doribleiended" paal i carried by the `main .drivergto "engage .one `1101' .the` other of the .drum driversiin` acnordance 1with thefdirection of rotation of the mainldriver said 4panal oscillatn )about an artis radial .i110` to the axis `oi? rotation of `theldrive shaft,

In a uhoist, the geombination of lend; i frames, a center bearingsnpported by the end frames,` a drive. shaft, i a irreversible. motor j t'orrrotatingthedriveallait, `a-pair ofvdrlims 11 15 rotatable Vrelatively` @to .the drive shaft, conf centrcally. arranged drumilrivers associated with the `drinne and rotating" in .the ,same transverse plane, said .drum drivers located atoneuendyof one otthe drunisfapml main driver rotatable `on lone and of the center bearing connectedfto @be rotatedby the drive shaft, a .bearingointegral main driver, Lpawls on .ogpositesidesxoft the bearing and extending `in opposite directions 125` h to engage one or the other `oi?theilrill'rr` drivers in accordance ywith ithe directiono` rotation of the main driver? aholt extending through the `parvis4 and the bearing to' nform` alpivot forfthepaw'ls` `said bolt 4being dis-` 11:130"

y posed radially with respect to the main bearing and disposed radially with respect to the main driver, pawls secured to the bolt on opposite sides of the bearing and extending in opposite directions to engage one or the other of the drum drivers in accordance with the direction of rotation of the main driver, the paWls oscillating in planes parallel With respect to each other and with respect to the axis of rotation of the main driver.`

In testimony whereof I have signed this specification. t

EARL B. LEAR.

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