US2478615A - Cable drum - Google Patents

Description

R. H. ZEILMAN Aug. 9, 1949.

CABLE DRUM FiledMay 14, 1946 2 Sheets-Sheet 1 Patented Aug. 9, 12949 .1;

v y Roy Zeilman, Elyria, Ohio, 'assignor to The Thew Shovel Company, Lorain, Ohio,ra corv poration of Ohio .amil/1 cation Mayu, 1946,-v serial No. 669,684

i 1 u My invention relatesto animproved derricking cable drum and storage reel mechanism therefor adapted for use in load handling machinery and my invention more particularly relates to a derrioking cable drum and storage reel mechanism thereforv adapted to be used to control the lowering or raising ofthe boom of a load` handling crane.

The usual winding drum of the .prior artis oommonly employed to store only such limited amountof cable as required for most uses, and it has been found to be undesirable to store` an excessamount of cable over that needed for the more usual operations of thev boom, since the effective diameter of they reeledcable willbe so increased as to increase the zoable speed during winding and unwinding operations, whereby the maximum cable pullis decreased below the fre'-V eciaimsicl. 2st-184)' I as economies. in manufacture,

ness maintaining a constant length of live rope and varying lengths of xed ropesthe extended length of the xed ropes being dependent on the boom length. l Y

An object of my invention therefore is to provide the improved drum and storage reelstruoture of my invention comprising a unitary drum mechanism capable of handling allofthe cable length necessary for various lengths of vbooms and cable drum portion without requiring that the derricking be constructed otherwise than in the standard dimensions.

Another object of my invention is to vprovide in a unitarydrum structure, winding and storage drum portions, wherein the stored cable remains unaffected during the operative movements of the drum tofwind or. unwind, thelive cable portion.

Another object of my invention resides in the provision for theV readygfsupply of 'additional lengths of cable from the storage reel onto the winding drum as requiredandfor the converse operation, the length of live cableffromthe drum may be readily lessened by'transferring a desired length of normally excess and stored cablefromv the liv'e cable winding drum to the storage reel,l

in alsimple, expeditious manner.

efciency in use, etc., are: also eieotedby my invention and will become increasingly apparent'from a review of thefollowing description and attached drawings,

u in which drawings:

Fig. 1 is a sectional View of the unitary cable storage drum and'winding reel of my invention keyed to a drive shaft of ra mobile power shovel, crane, or similar mechanism;

Fig. 2 is a fragmentaryl enlarged end view taken through the lines 2--2 of Fig. 1; f

Fig. 3 is a View similar to that of Fig. 2 but taken on the lines. 3.-3 of Fig. 1;

Fig. 4 is a view taken on the lines 4--4 of Fig. 2;

Fig. 5 is a View taken on the line 5-5 of Fig. 2;.

Figfll vis a sectional View taken on the line D-D of Fig. 7.;

Fig. 12 is an end elevational View of the mechanismof the foregoing figures.

Referring now to the drawings, all of which illustrate my improved winding drum and storage reel, in an integral unitary structure, the drum 2 and the relatively larger storage reel 3 are relatively axially aligned, and the unit is also pro-L vided with a brake drum portion, the latter being afforded'by an annular rim I0 peripherally supported upon a radial kweb I9 which extends *intermediately of the drum and reel and terminates peripherally in a substantially cylindrical flange l0, the outer surface 9` ofwhich aicrds fa brake drum surface, and is' adapted to be engaged in the usualmanner by an embracing brake band 25. The .windingdrum 2 comprises the. drum hub- 6, an end ange 1, and a4 similarly formed end flange 8, which is merged with the radial web I9, which supports the annular brake drum l0.

Thestoragev reel S'isprovided with a 'substantially cylindrical hub V4- and an end lange24, the other reel end 'flange being supplied by the base portionbf the web I9. f A f The unitary drum mechanismrismountednon other and further objects of my invention; such the' 'drive' shaft 411;Y bythe. drum hub' 161, a key-v s 3 being preferably employed to avoid relative rotation as between the drive shaft and the drum hub. A plurality of interspaced reinforcing ribs 39 integrally merge with the underside of the reel hub or web 26, with lateral surfaces of the drum flange 8 and the drum hub 6.

At 21, an aperture of the reel seat 26 is disposed closely adjacent the web I9, near its junction with the winding drum flange 8, and at Ir another aperture is provided through the wall of the drum flange 8. Y I

'Ilhe storage reel is intended to store derricking cable whose length is in excess of that of the nor? mal working cable required-for a given 'relatively short length of boom. The storage reel 3 is l'designed to carry the excess length of cable, whenever theV length of boom has been-reduced through the removal of a section and less cable is therefore required to operate the boom.

When a boom length is to be changed, preferably the boom is generally placed in 'a horizontal position with the outer end resting on a support. Then if the boom is to be shortened, a section is removed and the remaining section assembled. To take care of the resulting excess of the cable the cable clamp 20, whichis adjacent to the guide i6 is removed and the excess cable is drawn through the guide and the :cable clamp reinstalled. Now, by revolving the drum so as to raise the boom, while manually holding the free end of the reserve cable taut, so as to permit it to be fed on `the reel S, the working cable is wound on the drum and the excess cable is also, 'duringV the same operation, wound on the cable reel. This averts the necessity for 'winding the excess cable on the reel manually, although, especially for relatively shorter lengths of excess cable, manual reeling may be resorted to.

Through the two apertures i5 and 21, the end of 'the complete continuous cable may be 4successively projected and the portion thereof intended to be employed as a reserve length of storagecable is looped over the arcuately formed channel guide I6, Figs. 2 and 5, and then wound around the storage reel 3, and when completely reeled upon said reel the extreme end of said reserve cable is anchored by clamp 23 to a laterally disposed portion of the surface l2 of the web i9, the clamp being secured to said web preferably by a U-bolt 5|, Fig. 4, projected through any of the plurality of pairs 'of apertures 22 which are disposed at intervals through the 'web i9 near the juncture of said web and the brake drum flange l0.

During the operation of placing the end of the cable on the storage reel 3 when the full length of storage cable has been drawn through the apertures l5 and 2., Fig. 8, and after looping the cable 'portion 52 over the arcuate channel guide I6, a clamp 20 preferably similar to that shown at 23 Y is employed to tightly clamp the cable to the'adjacent surface of the web IKS.

The reserve or storage portion 4of the cable, after being wound upon the storage .reel 3, thus has its free end 54 and also its other end disposed adjacent the vguide l5 securely clamped to the'web I9 so that rotation of the reel with the winding drum Ais entirely without effect upon the 'stored cable which is rigidly affixed to the web by both ends.

The cable guide I6 4is rigidly secured preferably by welding 'or in any other vsuitable manner to the base of the web i9, adjacent to its juncture with the drum flange 8, being thus made integral with said web.

Figs. 2 and 3 best illustrate the manner-of prothe frame of the machine, as preferably comprisingin a single length the cable sections 53 and 54, Whose intermediate portion 52 is hooked over the curved channel-shaped guide I6.

With the guide considered as the datum point, and the cable clamp 2B in place, each of the said cable sections are wound in the same winding direction, respectively on the drum 2 and reel 3. Thus the said intermediate portion 52 of the cable leading adjacent portions define what may be termed.v a hairpin loop, extending to the faces of the respective storage reel and Work cable drum to take positions thereon as indicated on 54 and '53, Fig. 5, and in the' view of Figs. 2, 3 and 4 with the free ends of the cable portions 53 and 54 disposed at opposite sides of the separating web or wall i9, rotation in theclockwise direction as Viewed in Fig. 2 and in the counterclockwise direction asviewed in Fig. 3, of the entire unit 'comprising both the reel 3 and drum 2 of 'which the latter isof smallest diameter, both cable sections are wound on their respective reel and drum, during thesame power effected rotation of the unit. During this same period of rotation of the unit drum reel andbrake, the winding of the work cable 53 will exercise a pulling force on its free end to `elevate the boom, which is the natural result of reeling in the derricking cable. At the same time the reserve cable is wound at a faster rate because of the greater diameter of the reel 3, and therefore at or before the time that the boom is fully elevated the length of reserve section of cable is completely wound upon said reel whereupon `rotation of the unit comprising said reel and drum is discontinued and the brake is said to hold it stationary, whereby the end of the reserve cable is secured to the web I2 by operative placementof the vclamps 23, Figs. Vl, 2 and 3.

Figs. 10 and 11 illustrate cross sectional Views of the channel guide'l affording a guide seat Fl for the portion of the cable, shown at 52 in Fig. 2, and in the form shown in Figs. l0 and 11 the channel guide is shown as having been formed integrally Vwith the web I9 instead of welding a separate channel shaped piece thereto as previously related. l Y

As best illustrated in these figures, 'the Vcable wraparoundear l is provided with a relatively Wider groove il in that end of ear disposed adjacent the opening l5 than at theend of said ear IG disposed Aadjacent the storage drum bed, although in my preferred embodiment the depth ofthe groove remains the same.

The ear l5 is further curved inwardly and downwardly, as best shown in Fig. 1, at its medial sectionfto conform to the contour of associated portion EQ of the radial flange I9 Vwherefor the derricking cable isjfedonto the grooved portion l 'of the cable wraparound guide VIii without an abrupt `change in'its direction.

' The Ylowermost portion of the rib Il disposed nearest the holes l-ZI is'curved as is the portion I9 to allow the cable fed thereover to the spool 3 to pass easily and without binding or hindrance. 1

The `perforation I5, as shown in Fig. 6, is preferably of shuttle shape, the small end of the opening being disposed adjacent the derricking drum bed 2 and the larger end thereof being disposed adjacent the opening 2'I in the side wall portion of the disc.

I prefer further to so suitably dimension the cylindrical flange 8, as shown by the radials I to V, and more particularly in Fig. 9, that the taper of the flange decreases as that portion of the flange which is provided With the opening I5 is approached.

In order to strengthen the unitary winding drum, brake drum and storage reel structures in addition to the ribs 39, previously described, the radially extending flange or web I9 is also braced by the provision of radial ribs I I dividing the Web I9 into a plurality of radial portions IZ, preferably iive in number, and a radial portion I9, and in order to lighten the structure, these are provided with apertures such as these shown at I3 which may extend from the one to the other side of the web I9, said apertures being preferably interspersed between the ribs II.

From the foregoing description it will be observed that the direction of winding considering both cable sections as a single length, proceeding from the outermost convolution of the one section to the outermost convolution of the other section, is reversed at the junction between the sections where the said intermediate portion of the cable length is wrapped around the arcuate channel-shaped flange element I6.

The reason for the reversal of winding direction is to accomplish the winding of excess cable on the reel by power while the boom is being raised as previously described. It is apparent that if the direction of winding were not reversed, the winding of rope on the reel would not occur when raising the boom.

The use of two cable clamps serves a very dennite function, for the cable clamp adjacent to the guide passage through the flange serves to anchor the end of the Working cable. The second clamp serves to anchor the end of the working cable after it has been wound on the storage reel.

Having thus described my invention in a particular embodiment thereof in a manner to clearly specify the construction which I prefer to those skilled in the art to which my invention appertains, I am aware that numerous and extensive departures may be made from the embodiments described herein without. however. departing from the spirit of my invention and the scope of the appended claims.

I claim:

1. An integral metallic cable winding unit for derricking cable comprising a pair of axially aligned, relatively contiguous, winding drums, each provided with a cylindrical hub and a pair of drum-end langes` the hub of a first said drum being of substantially less diameter than, and supporting, that of the other drum. the axially inner flange of said rst drum being apertured adiacent its outer hub surface and the other drum hub being apertured adjacent its axially inner flange to provide a cable passage between the drums, an arcuate transversely channel-shaped cable guiding channel element secured to the inner side of the axially inner flange of said other drum and said cable passage and the channel of said guide being so disposed that an intermediate portion of cable being hooked over said guide in substantially hair-pin form whereby the cable, from one side portion of the guide, may, without being sharply bent, be directed by the guide and passage tangentially to said first drum hub surface, and the cable from the other side of the guide may be directed to tangentially engage the said other drum hub, whereby when said unit is rotated and the cable ends are held yieldingly taut, opposite portions of said cable, disposed toward its respective ends, may be concurrently wound, respectively, on the two drums.

2. The derricking cable unit substantially as set forth in claim 1, characterized by said axially inner drum-end flange of that drum whose hub is of greatest diameter, said flange having an unbroken periphery and being provided with an an- Y nular ange extending radially to an extent which is in excess of the width of the cable guiding element.

3. 'Ihe derricking cable unit substantially as set forth in claim 1, characterized by the provision of a flange integrally secured to and affording a peripheral portion of the recited axially inner drum end flange of that drum whose hub is of greatest diameter, said flange provided with an outermost brake surface adapted to be engaged `by a non-rotatable braking element to retard the speed of rotation of the unit when the cable is being withdrawn from the rst recited drum which is of least hub-diameter.

4. The derricking cable unit substantially as set forth in claim 1 characterized by the recited axially inner drum-end flange of that drum whose hub is of greatest diameter, having an outermost circumferentially continuous peripheral portion of substantially T-section in a transverse radial plane to aord a flange providing a peripheral outwardly facing brake drum surface and the recited cable guiding element being of less lateral extent than the relatively radially outwardly disposed portion of said brake drum flange.

5. The derricking cable unit substantially as set forth in claim 1 characterized by the provision of means to removably secure the two ends of a length of cable disposed on said drum whose hub is of greatest diameter, to drum-end flange portions of the recited drum that one of said securing means being disposed closely adjacent to the said guide, and said axially inner flange having peripheral portions being circumferentially unbroken.

6. The derricking cable unit substantially as set forth in claim 1 characterized by the axially inner drum-end :flange of that drum Whose hub is of greatest diameter having a circumferentially continuous peripheral portion.

ROY I-I. ZEILMAN.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 449,207 Cunningham Mar. 31, 1891 457,798 Smith Aug. 18, 1891 933,609 Sand Nov. 2, 1909 1,192,322 Jenkins July 25, 1916 1,498,228 Bell June 17, 1924 1,565,720 Estes Dec. 15, 1925 1,784,311 Perry Dec. 9, 1930 1,836,067 Faulkner et al. Dec. 16, 1931

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