US2271426A

US2271426A - Hoist crane construction

Info

Publication number: US2271426A
Application number: US250576A
Authority: US
Inventors: Robert J Harry
Original assignee: Individual
Current assignee: Individual
Priority date: 1939-01-12
Filing date: 1939-01-12
Publication date: 1942-01-27
Anticipated expiration: 1959-01-27

Description

Jan. 27, 1942. R. J. HARRY HOIST CRANE CONSTRUCTION Filed Jan. 12, 1939 2 Sheets-Sheet l Jan. 27, 1942. HARRY 2,271,426

HOIST CRANE CONSTRUCTION Filed Jan. 12, 1939 2 Sheets-Sheet 2 yam/2 h, aim

' "UNITED STATES PATENT OF FICE- v y iRobertifiarry, Alliance; Ohio I I I innicai an teiy 12; 19sa-s rialN amaq 1 Claiiiisll (c1 invention relatesto :hoistfrhe chanisin, and more,particularly,- to new and, improved theist mechanism suitablefor overheadcrane utilization. 1;... a v;,;; j

Y In employing hoist. mechanisms suitable for handlin :.and;carrying heavy loadssuch vas 'encountered in theutilization of'a crane,,and particularly, a traveling crane, it has beencustornary to employ'interleaving hoist cables for supporting the load and forsuitably raising and loweringthe load. Hoist cables andtheir associate cl operative mechanismsmust stand considerable strain; stress, and wear without dropping the load;,I-Ieretofore, inqemploying a pair of hoist.

drums with suitable :sheaves, the cables; have been interleaved in suchamannerthat reverse bends result. I have found that such .reverse bends materially increasewear on the cable and thus, decrease its effective and efiicient'operative life I have also discovered that such a type of, bend alsolincreases the strain as .well as :the wear upon thesheaves, drums, and other assoch, ated hoistelements. By reverse bends? I'have reference to a relationship of cable portionsb wherein one drum wheel willbe moved clockwise while an adjacent sheave wheel will be-moved counter-clockwise. ,That is, a particular, cable hasra reverse bend when it is, reevedrforwardly over. one wheeland is reeved backwardly with. a-change of directionmveran adjacent'wheel withthe result that-one'wheel must rotate'in an-v opposite direction tothe other wheel whetheritkis; adrum or asheave. As distinguished fromthis; I reeve the cables-in one direction such asmforwardlyover all" of the wheels; thus eliminating reverse bends. By transverse bends, I haVBIGf erence to directing or reeving the cable. atzsub-zstantially-right angles to its previousdir'ection: And, it has been an object of the presentinvention to devise anew and improved operative arrangement of a hoisting mechanism: r Another object has. been to eliminate reverse to hosselsk ll d-s n niech nisin, embO dyiiflg the iprinciplesofimv "1 vlention andthat may be utilized with a traveling crane such as shown in my copending application Serial N 0,

3.1 and u e-31s a; v l on p me? u fix s 4 1 edit In the drawings I have forgthe purposetoi illus.

tration disclosed a:travelingcrane; arrangement constructiorrjmay be employed. The numeral bends in-a hoisting cable,and particularly, where interlocked drum gears are employed. vI

A further object has been to provide'a hoist ing mechanism having an improved cable rela- Aistill further object has been to provide an improved, hoist mechanisrn' -fortaefour girde'r craneoonstruction. .0 5 v TIheseandmany other objects will appear to t ose skilled in the art from the drawings, the description thereof, and the appended:claims;

E t rawin s:

, Eigure. 1 ;-1s a s de viewinielevation ofa:

s ners represents a substantially longitudinally-extend andis pro dead with a trackrailrll for receiving mounting" such frame with respect. .to the ssupport girders I0; t In like manner an' auxiliary girder I01 "extends substantially longitudinally-and ina spaced-i; apart relationshipiwith respect to the main'gir'd fl ers Inland-"supports a track rail H for a's'uita'ble auxiliarylitrollemrif employed. 5111' the embodiment-or my pair ofi1drumsl5 jourmile'd withinbearing pertions 1610f the main frame are preferably mount-' t ed in such-a manner that their i'otative" ax s on the sameiplane; preferably a hori zoiital'planej that extends .transversely with respect to the main trolley frame.

' Thei'drum's l 5ihave interlocking geais le inesng ingiwith each otherandalso with driv pin ons I] r-positio'fried adjacent opposite ends pai srwrrne pinioris 11 are journaled within suit:

able bearingSQ'IS -"and are drivenby aerive's'h'af-t' I Batthattis; adapted, toiext'end on opposite sides ofione drum pair to connect; it to-asimilar pair on an'opposite side of the machine; "The trans- "versely-exten'ding drive [shafts l8a ma'y be conne ctedgtoga suitable vmotivating mechanism such 250,578, filed January 12,-,l939; jen-, 1 7 titled Hoist crane construction, Case D. 1.3

ie re :72,- i aimn i w/ n e at 'sh win a symm tric l; l o a s it b r a e onstruci- ;v tio n -e'mployingg the hoisting'gmechanism iof Fig s diagrammatic perspective view in; z illustrating cable -or.grope interleaving, s

r 111 lines and the other in; dotted' lines; same reference characters have such as l set I forth in my copending application; above-mentioned It will however, be apparent.

the artthat any suitable crane ing rnain itr'olley'girder thatis positioned adt-l jacentopposite sides of ;the crane construction v flangewhjeel 12 operably mountedin a house: irig portion Moi the main trolley frame portion: '13 of a hoist trolley, Carriage, wheels:- 12 are preferablymounted;- at four transverse side cor-: 5 of the frame l3 for operably andymovably "invention showng a axes of the sheave wheels preferably extend in the same direction as the planes representing rotative axes of the drums [5, namely, transversely of the crane construction.

In addition to eliminating a number of sheave wheels and associated cables and connecting portions, and materially simplifying the operative construction, the present arrangement makes possible the utilization of large size cables in a highly efiicient and effective manner. Also, safety features are incorporated, preventing dropping of the load in case one cableshould fail. v 9 v The uppersheave wheel construction is journaled within lower portions of the main frame 13 by suitable bearings 2|. The lower sheave wheel 29 is rotatably mounted by a shaft 30 on vertically-extending support arms 26, 2'1, and 3|. The support arms 26 and 3| extend downwardly through a transversely-extending lifting or ladle beam 25 and additionally support a laminated ladle hook 36 mounted thereon by a pivot pin or shaft 3'1. The support arm 21 is secured to the ladle beam.

A pair of connector pivotally-balan'ced lever arms 32 extend longitudinally of the direction of movement of the hoist apparatus and are pivotally connected at 33 on opposite sides of an upper end portion of the substantially centrallymounted support arm 3|. As shown, the

sheaves

20 and 29 are preferably divided into two parts in order to receive a pair of interleaving cables,-

ropes, or chains 23; it will thus appear that a failure of one chain will not permit the hoist construction to drop. In efiect, each so-called sheave comprises a pair of sheaves whereby a pair of cables may be employed. When I speak of cables, I include reference to ropes, chains;

and other suitable means for reeving the drums and sheaves. V

A cable b on the right side of the sheave and drum construction in Figures 1 and Band on the left side of Figure 2, is connected or dead-ended at a righthand side of the connectorarms 32 at 341), referring to Figure 1, leaves over a right v portion of the upper sheave 20, viewed from Figures 1 and 3, and then turns downwardly and extends over a lefthand portion of the lower sheave 29 and again extends upwardly and connects with the righthand drum I5 viewed from Figures 1 and 3. In like manner, a cable a is connected or dead-ended toan oppositepoint 34a of the lefthand arms 32, viewed from Figure 1, and after interleaving, as shown, with the upper and

lower sheave wheels

20 and 29, extends upwardly and connects to the lefthand drum 1.5 as viewed from Figures 1 and 3. The same arrangement is preferably employed for both halves of each sheave wheel group and for each of the two connector arms 32.

'From the above explanation, it will appear that each half of each sheave wheel group supports a pair of cables a and b which in turn connect to their respective hoist drums.

When I speak of leaving or interleaving of the ropes or cables in the specification, I have reference to running the cables over the drums and sheaves, or in other words, reeving them. When I speak of interlocking drums, Ihave particular reference to the intermeshing of the gears of the drums and to the utilization of additional connections such as I I and 18a in such a manner that the drums will rotate in synchronism and will prevent dropping the load being hoisted if one part should fail. Since the drums are separately driven by the gears I! as well as by the intermeshing of the drum gears I5, it will be apparent that a breakage of one drive member will not cause a dropping of the load.

In addition, as will appear from the previous description, and as shown particularly in Figure 2, I preferably provide a pair of ropes or cables which reeve with pairs or half portions of upper and

lowersheaves

20 and 29 as well as-witli the associated intermeshing drums l5.

When I speak of the axis or axes of the drums,

sheaves, motors, etc., I have particular reference to the axis or axes about which they rotate. r

Although for the purpose of illustration, I have shown the hoist apparatus as employed in connection with a particular type of crane con struction, it will be apparent that it may be employed in connection with any suitable crane and also that many modifications, additions, and subtractions, etc., may be made in the hoist con struction shown and described without departing from the spirit and scope of the invention as indicated by the appended claims.

I claim: v j

1. In a hoist mechanism having a suitable frame, a pair of hoistin drums operably'moun't ed on said frame and having a portion of their axes in a side-by-side relationship, said drums having operably intermeshed drum 'gears,-"a hoisting sheave means operably mountedon said frame and having a rotatable axis extending in' substantially the same direction as the abovementioned portion of the axes of said drums, 'another hoisting sheave means operably mounted at one end thereof'to an extending portion of said carrier, each said cable means reeving'over one of said drums and its associated sheave means in such a manner that each of said drums will turn in the same direction as its associated sheave means. x 2. In a hoisting apparatus having a suitable frame, a pair of rotatable hoisting drums having a portion of their axesin a side-by-side relationship, each of said drums having a gear, said gears bein operably intermeshed, said drums being operably mounted on said frame, a pair of hoist; ing sheaves associated with each of said drums, the rotatable axes of said drums and gearsextending in the same direction with respect'to each other, hoisting means operably with'out any reverse bends from and to-end of the hoisting means reeving one of said drums; and its associated sheaves for rotation in the same direction with each other, and means operably without any reverse bends-from end to'endof tlie hoisting means reeving the other drum'and. its associated sheaves for rotation in thesame direc-' tion with each other and'for rotationin mo posite direction with respect to said first-mentioned drum and its associated sheaves. 1

3. In a hoisting apparatus, a pair of rotatable hoisting drums having a portion of their. axes-in a side-by-side relationship, said drums being op-' erably intermeshed, a sheave associated with each of said drums,'said sheaves having a portion of their axes in a substantiallyend-to-end relationship with respect to each other, said portions of the sheave axes extending in substantially the same direction as the above-mentioned portions of the drum axes, means operably reeving one drum with its associated sheave for rotation in the same direction therewith, and means operably reeving the other drum with its associated sheave for rotation in the same direction therewith, each of said reeving means being deadended substantially midway between said sheaves.

4. In a hoisting apparatus having a frame, a

pair of hoisting drums, each drum having a gear, said drums being operably intermeshed through said gears and having a portion of their axes in a side-by-side relationship, said drums being mounted on said frame adjacent a side thereof, a sheave associated with each of said drums, said sheaves having a portion of their axes extending in substantially the same direction as the abovementioned portions of the drum axes, means reeving each drum with its associated sheave off non-opposed outside portions of each of said drums, a lifting beam, and means operably con-. necting both of said sheaves to said lifting beam adjacent one and the same end thereof.

5. In a hoisting apparatus having a suitable frame adapted to be moved longitudinally, a pair of rotatable and intermeshing hoisting drums on said frame having a portion of their axes ina side-by-side relationship, such portions of the drum axes extending substantially transversely of the longitudinal direction of movement of the frame, sheaves having a portion of their axes extending in substantially the same direction as the above-mentioned portions of the drum axes, a lifting beam extending substantially transversely of the direction of movement of the frame, means reeving said sheaves with'said drums, and means associated with said reeving means for connecting each of said drums to said lifting beam adjacent one and the same end thereof.

6. In a hoisting mechanism having a suitable frame, spaced-apart pairs of rotatable hoisting drums, each pair having a portion of their axes I in such a manner that each itsnassociated sheave and connecting each drum of the other pair to said lifting beam adjacent an'opposite end thereof.

' 7. In a hoisting mechanism having a suitable frame, a pair of h'oisting drums. operably and rotatably mounted on said frameand having a portion of their axes in a side-by-side' relationship, said drums having gears operably interm'eshed with respect to each other, a pair of hoisting sheave means for one of said drums, one sheave means of said pair being operably'mounted beneath the associated drum, the other sheave means of said-pair-being operably mounted beneath such associated drum and beneath said first-mentioned sheave means, a pair of h'oisting sheave means for the other drum of said pair, said last-mentioned sheave means pair being mounted in the same manner with respect to its associated drum as said first-mentioned sheave means pair with respect to the first-mentioned drum, the rotatable axis of each of said drums extending in the same direction as the operable axes of an associated sheave means pair, a member for holding a load to be hoisted, a carrier having a portion connected to said member, said carrier extending outwardly from its connected portion substantially transversely thereof, and. means having portions operably reeving over each drum and an associated sheave means pair and being positioned on said carrier of said drums will turn in the same direction as its associated pair of sheave means when actuated to raise or lower said member. 7

8. In a hoisting appara us, a pair of rotatable hoisting drums having a portion of their axes in a side-by-side relation, each drum having a gear, said drums being operably intermeshed through said gears, a pair of sheaves associated with each of said drums, the sheaves associated with one of said drums having a portion of their operating axes in a substantially end-to-end relationship with a portion of the operating axes of the sheaves associated with the other of said drums, said portions of the sheave axes extending in substantially the same direction as the above-mentioned portions of the drum axes, means operably reeving one drum and its associated sheaves for rotation in the same direction with 'each other, and means operably reeving the other drum with its associated sheaves for rotation in the same direction with each other,

in a side-by-side relationship, each drum having a gear, the drums of each drum pair being operably intermesh'ed through said gears, at least one hoisting sheave associated with each drum of each pair, a lifting beam, means operably reeving a drum of one pair with an associated sheave for rotation in the same directiontherewith and connecting said drum to said lifting beam adjacent one end thereof, means operably reeving the other drum of said pair with its associated sheave for rotation in the same direction therewith and for rotation in an opposite. direction with respect to the first-mentioned drum and its associated sheave, said last-mentioned means connecting said other drum to said lifting beam adjacent the same end thereof as said first-mentioned drum, and means in the same manner operably reeving each drum of the other pair with 9. In a hoisting mechanism having a suitable frame, spaced-apart pairs of rotatable hoisting drums operably mounted on said frame, each pair having a portion of their axes in a side-by-side relationship, each drum having a gear, the drums of each drum pair being operably intermeshed through said gears, hoisting sheave means operably associated with the drums of one pair, hoisting sheave means operably associated with the drums of the other pair, the operating axes of said drums and sheaves extending in substantially the same direction with respect to each other, a lifting beam, means having portions operably reeving each drum of each pair with an associated sheave means and connecting each of said drums to said lifting beam adjacent an end thereof in such a manner that each drum and its associated sheave means will turn in the same direction with each other, each drum of one pair being connected to said lifting beam adjacent one end thereof, each drum of the other pair being connected to said lifting beam adjacent an opposite end thereof.

10. In a hoisting apparatus as defined in claim 4, wherein each sheaveand its associated drum will rotate in the same direction with respect to each other and in an opposite direction with respect to the other drum and its associated sheave means.

11. In a hoisting apparatus having a frame, a pair of hoisting drums, each drum having a gear, said drums being operably intermesh'ed through said gears and having a portion of their axes in a side-by-side relationship, said drums being 0perably mounted on said frame adjacent a side thereof, a sheave means associated with each of said drums, both said sheave means having a portion of their axes extending in substantially the same direction as the above-mentioned portion of the drum axes, means reeving each drum with its associated sheave means off non-opposed outside portions of each of said drums in such a manner that each sheave means and its associated drum will rotate in the same direction with respect to each other and in an opposite direction with respect to the other drum and its associated sheave means, a lifting member, and. means operably connecting both of said sheave means to said lifting member adjacent one and the same side of the frame, wherein each said sheave means comprises a pair of spaced sheaves.

ROBERT J. HARRY.