US1788938A - Hoisting mechanism - Google Patents

Description

Jan. 13, 1931.

Filed March 25, 1929 4 Sheets-,Sheet l Jan. 13, 1931. T. zE-rTERLUND HOISTING MECHANISM Filed March 25. 1929 4 Sheets-Sheet 2 Jan. 13, 1931. l T. zET'rERLUND HOISTI-NG MECHANISM 4 Sheets-Sheet 4 Filed March 25, 1929 driven. from either one or the otherof two j 'Patented"Jan. 13, 1931 ArrroMATro Hoisr coMPaNY,

or MILWAUkan,y Wisconsin HoIs'TiNG ME'onANIsM Application ined March a5,

This invention relates to ahoistingA mech-` anism, f l

IA(Objects of this invention are to provide a 'novel form of hoisting mechanism in which a hoisting drinn sheave or member is carried by a hoisting drinn shaft andis reversely rotating.members, either of `which` maybev operatively connected in driving reiation to thefhpisting drum, and to provide 'brake mechanism' positively, .operatively connected to:thezhoistingidrum vand applied Whenever the driving men'ibers are both operr-tively disconnected Afrom` theV hoistingV possible chance of drum :so that there is no the slipping of the load.-

Further objects are toprovide a 'hoisting ineehanismin Which two positiveclntohes are .employed and associated with -elontrol mechanism in such a. manner-that only one clutch. maybe closed at a.time,the`control mechanism being. so related-to 'the brake mechanism `as to release the' brake Whenever either clutchis closed. V

control mechanism Which hasa'fquiok inotion for closing either clutch, soithat there VisvnoA grinding ofthe clutch vjavv's but in VWhiohthel clutching .is positively and quickly Whenever the mechanism is opeffected;

erated in a-predetermined manners l Further ob] ectszare to `provide a construc-v tion in which there are independent rock shafts for' controlling the `clutches f andV in which a balancing-mechanism is `employed and connected with the brake, application of the brake always occurs `When the vtwo clutchesfare; out, .and so that the brakel is alwaysreleased when either clutch is operated.` 1

f vFurther objects are to provide a compact, serviceable and novel-type of hoisting meelanisni in which the entire apparatus is portable and self-contai`ned, and inwhich the consti-notion 1s simple, rugged and-snbstantially fool-proof. Y

ratns with parts sectionedofi'.

- the hoistingishaft l.

Anembodiinent ofthe invention is shown Y 1929. fseriai No. .349356.

- -UNITED STAT .YP-Aralar Tampon .zETTEnLUNn' or 'MILWAUKEE Figure 2 isla plan View of the mechanism `With the upper1 part ofthe ycontrolineohanism audits associated casingremovedQand with parts in 4 section. Y Y

Fignrel 3 `is *av sectionalL view; on .jaA line 3,-3 offFigure l.

control shaft land 1 associated mechanism. 1

Figure 5 isa-detail .ofa springy construe#` portion oft-he tripV or release mechanism.v

Figure r(is a'sectional detail showing gthe F 'gnregfi is. al fseotionalf` view through Ythe Gef cintchrock shaft. andassocijated partsj Y Referring to the: drawings:particularly Figure, it will be seen that a hoisting shaft l is suitablycarried byfbea'rings formed Y This hoisting shaft rigidly car` ries a hoisting. sheave 3 and. a'hoisting drum Obviously, either one 'or the otherof thezdrums maybeomitted5 as desired, or both. may bensd- Without departv from thespirit of this finventiong v y. aThe hoisting shaft is driven frorna jacli .Further objects are .to .provide clutch acasing 2.

4 at opposite ends.l

the jack shaft and meshingivitha relatively. large gen1; rigidly' Carried. by

therefore permanently5 'operatively coupled bythe gearing. t ..7-1

-Ai pair of .bevel loosely mounted' upon the jacke shaft .5f and PlnlOnS .OrifgearS i 8 .are

. These tvvoj shafts are 'i are rotated in topposite-` directionsby means Y 0f. a' bevel ably mounted in rollerbearings Vcarried doy pinion lorfgeary 9,. rigidly carried by `the drive shaftl 10Q'V TheA shafts are. suit so that the.

astationary portionof the casing; and also f the bevel f gears y8V are .carried .by roller bearingsvand supported from ajstationary .ponV Y tion -lof the Figure. v3. f

9. par of sudati@ clutcamembeifs 117,1whigh areoperated bymeans of 'forked'. levers 12;

rigidly carried yby the `rock s haftsl forthe clutches. v` v These rook `shafts#fprojeotV -"ont-- vvardly vbeyond Vthicasing:as shoyvn inyFig- 1.nje s ,.2v and 7,l and are provlded W-i 'clutches at their squared portions, as` indicated in Figure 2.' l

The jack shaft 5 is provided with a rigidly attached brake drum 16 l (see, Figurel 3) which cooperates with a brake band 17.

This brake band is` prevented fromturning by means of the U-shaped member "18 "(see Figure 1). The' U-shaped member loosely and slidablyv itsOne of aplurality ofjsupporting jpins 19 Yprojectingoutwardly from L lthe casing of tliema'chine, asshownfin 'Fig- 15 its contacting withthe rotating brake drum ures 1 and 3, and carrying at their-outer ends a shielding ring 20, as shown' inFigure 3. In order to preventtlre;bra ke band from excessive wear at any one portion due to when thebrake is open, a limit screw 21 is provided"andcarried by a bracket andlcontrols the rearward or outward motion ofthe U-shap`ed member, 18, thus causing the brake band to be entirely free fronr contact with the rotating brake driunlat'thetime when the brake band is untensioinedj` The brake Y band may be tightenedv by means' of 'any suitable mechanism, for instance, a ro,d 22

l (seeFigure 1) may extend 'through *a-Kpivotedv bloclrcarried by'a lev'er23, one/end ol' such lever being pivoted to the opposite end of the brake band fromfthat carrying the portion ofithe machine.

rod 22. The rod maybe threaded and vmay desired. c f' c Y The lever v23"(far1ies at its outer orffree end-a rod'or link f24,asv shown infFigures '1' and -2Q l This link2tr extends to the free end of' a lever 25, 'the oth'er end'y of the lever25 being pivotfally mounted uponfa stationary carry adjusting nuts to take up forwv'ear, las

Y ofthe rock-shafts 113 -f-fo'rthe clutches.,V

From the description'thus far given, it. is apparent that lwhenvtheilevers 15,` are 'in their clutch openlpositionsgasfshown in 'Figure 2, that the centraljpivot 29f0r`the'lever 2G will bev in f its outermost positionandconsequently, the brake will `be applied. If, however, either-lever lr'ocks into clutchclosing' position, the extension 28 thereof 'will releas'e-itspres's'ureupon the ro'd orlink 27, and will l correspondingly allow theV lever 26 to-fro'ck inwardly atcone` end. This'accord-v ingly 'moves the lever25 andthus releases thefbrake. As-soonas the clutch isopemthe brake `isi-again applied,-las"described above, for then bot'hclutches 'willbe' in theiropen positions; v p Y y* v No spring? mechanism has been :shown'r-'as associated with the'brake band and the re itselfand thus aid in the motion of the related parts.v This latter is the form shown in the drawings. .i v Y Each ofthe clutchjroclrshafts 18,'as'shown in "Figure 7 is spring urged 'towards clutch closing position by means of the spring BO. This spring may'have one end secured to a rigid .portion of the machine and may loosely surround the rock shaft 13, its other end being` hooked Lin a slot 31, A(see Figure 5) formed inanadjustable sleeve or shield 36. This shield 36, as shown .in Figure 7, is preferably .provided with a socket 37 adapted to 'receive a suitable tool for rotatingthe shield After the required tension hasb'een obtained, al set screw 38 is tightened `andthus locksthe sleeve 36 to theroclr shaft.

The clutch. operating leversfl are spaced apart slightly, andl carryat ,their free ends rollersf 39, y as shown V1n Figure. 2,` which cooperate .withV camsftO, the/cams being' vpreferably placed one behind the other and,

of course, in line with the cam follower rollers 39. The shape/offene ofthe cams is shown in 4full lines and theother "cam in dotted'lines in Figure 2; The shape ofthe two 'cams is identically the 'same except that they areA reversed Although two cam plates are shown, it is to be distinctly understood: that they are'rigidly connected with each other andimay, if desired, Ybe integral, as indicated in Figurevllf Thus, after the cams arerotated, the cut-outi-portion of one or the otherl c 'am'is presentedV to the appro'- priate roller. 39. The correspondingflever' `15, however, is preventedV from moving iny wardly by' means of |`a hardened bearing plate' filyc'arriefd .by the lever which contacts witlr a l l plate42,KVV carriedr by onel arm 4:3` of a bellcrank Ylever,=see vFigure 2.' i

The other Varm, 44 offsuch lever, projects inwardlyl between-the ,twol portions of the cam. Y lt is adapted `to be struck by a trip pin 45carriedbyfthe cam. :The construction of the quick motion mechanism is of course duplicated on the opposite sideofthe control cannas shown in Figure 2. y

In operation, it is clearthat Yafterthe cam is 'rotated in one direction, one ofthe `cutouts is presented.Y to the corresponding roller 89., The roller, however, is prevented'from.

moving inwardly until'the pin 45 hits the '=c'orre'sponding hardened Vbearing corresponding lever 44: vand thus'trips the catch whichrestrain's the rocking motion of the lever 15.k Thus, when 'the' pinV hits the catch of the trip mechanism, the llever -1'5 `moves inwardly very quickly under the infininter-locking teeth being provided on the rotatingpinions and clutch members as shownin Figure 3. This quick inotion'mechanism is provided for yclosing one or the'` other of theclutches. yThrough the. link mechaioA nisin Apreviously described, it is apparent that thebrake is released Whenever a clutch is closed. Y v

' Then the clutch is again opened the latching mechanism is re-set by means of a spring. The spring for one of the latching devices is indicated by the reference character 46 in Figure 6, and it will be seen that it is loosely coiled about the pivot pin 47, for the latching mechanism, and has one end secured to such pin and the other endcsecured to the tripleverlt.

The pin 47 may be carried within a socket formed in a portion of the casing and re- Y, tained in Vplace by means of-'a set screw 48,

" as shown in Figure 6.-

g carried by an upwardly extending' auxiliary casing 50, bolted to the main portion ofthe c machine by means of the bolts 5l. A".lhis 3 0` controller shaft an'dgauxiliary casing are sectioned olf in Figure 2, but are shown in detail in Figure 4.A lThecontroller shaft is provided at'itslower end with a disc 52,

equipped withV a pair of downwardly extendjing' lugs 53 whichfit ,into openings in the cani/10,'as shown in Figures 2 and ,4. The

i 'upper end of the controller shaft 49 carries i elevator construction such as employed dur-l any suitable control mechanism, for instance, a pulley 54' to Y `which contrjol cables not e control- The "device is adapted for a temporary ing the erection of a building.` If a two-car elevator s Y'stem is employed, then the main cable is wrapped around the sheave 3. K- If, however, a single cary elevator system is eni- In order to avoid needless repetition of terms, the expression drum will be used in the claims as indicating either the sheave or the drum.

cam in' neutral position when the hoist is not in oper-ation, a spring-pressed lever 55 is providedwith rollers 567which vlit into' corresponding notches 57Y (see Figure l) formed in the Ytwo .portions 0f the cam. Thus, these spring-pressed rollers tend tok maintain the cam in' neutralposition against accidentalfshifting. Y d Y A Y.

It will be seen that a novel Iform of hoisting mechanism has'been-provided by this.,A

The means for operatinefthe'control cam consists of a controller shaft. 49, which is ployed, the cable is wound around the drum-l V50V 4.

invention, whichis of 'relativelyrsimple construction, Vwhich is free from delicate and easily .broken parts, and which is easyto operate. v Y Y f lt will be seen substantially fool-proof; the brakeis always set when both clutches are open and yis always released ywhen either clutch; is closed.

further,` that the device vis- Although the invention has beendescribed in considerable detail, such description is intended as illustrative rather than limiting, as the invention may be variously embodied and` asthe scope ofy such invention is tobe determined.asclaimedf l 7 l l claim: i V

l. A hoisting mechanism comprisingk a hoisting shaft, a ,drumY carried by said `hoisting shaft, a jaclr vsli-aft geared to said hoist-v ing shaft, ay pair of revoluble members, means for rotating saidfmeinbers in oppositek directions,y clutchesV 'for selectively connecting .said members. tosaid jackshaft, a

brake drum carried by` said jack; shaft, a

- brake lfor said drum, and mechanism.opera-Y tively connecting said brake andclutchesfor.

releasing saidbrale `when. eithen clutch ris closed and-forV applying saidibr-ake :when V both clutches e selectively operating saidclutches..

2. A. hoisting mechanism comprising a hoistingk shaft, a drum 'carried by said'hoisting shaft, Jackl sli-aft, a `pinion rigidly carried by said fjaclc-fsliafhfa gear rigidly carriedby saidhoisting shaft and meshing with said pinion, a pair o'f'revolubleemembers, means for rotatingy said members in opposite; directions, clutches for. selectively are open, and cani means for connectingsaid members to said jackgshaft,

a brake :drunicarried byl said. jack shaft, :a brake forsaid drum, and mechanismqoperatively connecting said brakeand clutches for releasingsaid brake when either clutch is closed and for-. -applyingsaid brake when both :clutches are `open,` and quick. motion,

cam controlled f means for operatingfsaid clutches'.

3. A hoistingv mechanism comprising; a` hoisting -shaft,*a. drum carriedV by said hoist-v ing shaft, a jack shaft geared to said hoisting shaft, brake` vfor 'saidjacl shaft,"a

Vmovable /inember for-'controlling said brake,

anequalizing lever pivoted intermediate its endsto said movable member, apair of `re- YYversely rotating members,clutches-for selec- In order to insure thev maintenance ofthe said equalizing lever.vv .c

. 1l. A jhoisting @mechanism .comprising a1 hoistingshaft, a. 'drum carriedby saiclrhoist-l ing shaft, a 'Jack shaft geared to said Lhoist-v ing shaft,a Y brake;V for saidVV jaclrshaft, a movable' member for i controllingsaid brake,-

an equaliaiiig lever pivoted'::intermejdiatefits ends tor vsaid movable member, "a 1 pair ofA -re versely rotating members, clutches for selectively coupling one or the other of said reversely rotating members to said jack shaft, levers for y operating said clutches, means; connecting' said levers to opposite ends of said equalizing lever, and quick motion mechanism for controlling said clutches. 5. Ar hoisting mechanism comprising a hoistinglshaft, a hoisting drum carried by said shafta jaclr shaft geared to said hoist,- ing shaft, a brake drum carried by said jack shaft, aV brake band surrounding saiddrum, a brake operating rodcontrolling said brake band, a pair of'reversely rotating members, clutches for connecting either of said ieversely rotating members to said ack shaft, a, pair of leversfor operating said clutches, a brake lever connected toty said brake rod, and an equalizing lever pivoted intermediate its ends to said brake leveigfthe ends of said equalizing lever being connected tothe levers for. operating the clutches.

1G. A hoistingnmechanism, comprising a hoisting shaft, a. hoisting drinnA carried by saidsha'ft, a jack shaft geared to .said hoisting shaft,V a .brake drum carried by said jack shaft, a bralze band surrounding said drum, a

` brake operating rod controlling said. brake drum, a pair ofreversely rotating members, clutches for connecting either of said reversely rotatingy members to saidI jack shaft, a'v

pairof levers for operating said clutches, a brake lever connected to said brake rod, and an equalizing lever pivoted intermediateits ends tofsaid brake lever, the ends of said equalizing lever being connected to the levers foreoperating the clutches byfmeans of rods, said last mentioned rods and said brake rod being. adjustable. 1 i

2" ,Al hoisting device comprising a hoisting shaft provided with a drum, power means, a pair of revoluble, membersdriven in reverse directions y b-y saidpowermeans, clutches for. selectively, operatively coupling said revoluble Vmembers Vto said hoisting shaft, a pair of levers for controlling the operation of said clutches, springs urging said'levers towards clutch-closing position, a

pair of spaced cam discs controllingthe movement of theI freeA ends of the clutch control- Y ling-:levers and each vhaving a cut-out to perinitrtheinward motion of the respectiveY lever-when the cam discs are rotated to Vprey determined positions, a pair of springs pressed trip levers projecting into the space between the cam discs, a pin carried by said cam discs for `striking one or the other of said trip levers, said trip levers normally restraining the inward motion ofthe clutch controlling levers. K Y i V8. A hoisting levice comprising a hoisting sha-ftl provided with a drum, power means, a pair of revolublemembers driven in reverse/directions bysaid power means,l

l messes;

clutchesforselectively, operatively coupling said revoluble membe 's4 to said hoisting shaft, a pair of levers for controlling the operation of said clutches, springs urging between thecaindiscs, a pincarried by saidcam discs for striking one or the other of said trip levers, said trip levers normallyrestraining the inward motion of the clutch controlling levers, and a controller shaft removably attached to said cam discs. 1n testimony that I claim the foregoing have hereunto set my hand at Milwaukee, in the county of Milwaukee vand State of Wisconsin,V f

T HEODOR ZETTERLUND` iso

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