US2450605A - Hoist - Google Patents

Description

0,5,194s. s s. MqNfYRE 2,450,605

HOIST Filed Nov. 8, 1943 5 Sheets-Sheet l INVENTOR BY 5.M /NTY.BE

ATTORNEY Oct. 5, 1948. s. s, MCINTYRE 4 2,450,605

v HOIST 1 Filed Nov. 8, 1943 s Sheets-Sheet 2 gj j LII/1:512. lg:

i llllllllyll INVENTOR 55. M /NTYEE ATTORNEY S. S. M INTYRE HOIST Oct. 5,, v 1948.

Filed Nov. 8; 1945 VII/A 3 Sheets-Sheet 3 INVENTOR, V N l vrmz ATTORNEY Patented Oct. 5, 1948 OFFICE HOIST Sidney S. McIntyre, Sedro-Woolley,'W ash'. Application November 8, 1943,.Serial No. 509,367

This invention relates to improvements for use on ships, docks or at other places for the lifting and handling of loads by a cable that may be wound onto or paid out from a cable drum.

One of the principal objects of this invention is to provide a hand hoist having a frame structure of improved form that facilitates its being mounted, that avoids the placing of strains upon, or causes distortion to parts, due to any unevenness of the foundation, avoids unnecessary fric tion and gives greater strength to the structure. Another object of the invention is to provide a hoist of the character stated wherein the cable winding drum is positively driven through intermeshing gears, and wherein a selection may be made of any one of a plurality of gear ratios'for driving the drum, as best suits the load being handled or lifted. a

It is also an object of the invention to provide a gear driven winch, and to provide for a certain shifting'of gears to provide for a free unspooling of cable from the drum when such is desired.

' Still another object of this invention is to provide a winch in which the framestructure comprises a fixed, central shaft upon which the cable drum is revolubly mounted, and wherein this shaft is mounted at its opposite ends in independent frames or pedestals which permits themto readily conform to any unevenness of foundation parts to which they may be applied, thus eliminating the usual requirements of extreme accuracy in alining or leveling up of base members on which the hoist is to be mounted, and thus avoiding placing the parts under tension or strain that might otherwise result from drawing the parts down tight with bolts to secure them to parts that are not accurately aligned or leveled up. V I

Another object of the invention is to provide a novel extension frame coacting with one of the end frames to provide spaced supports for the various gear wheels through which theycable drum may be driven; the gears having hub portions extending from opposite sides and revolubly mounted in the spaced frames, with the gears located, centrally of the hub bearings asa means of cutting down wear and friction. Further more, providing a construction that permits use of gears with integrally cast mounting shafts, whereby their weight is reduced and manufacturing costs are lessened.

It is also an object of the invention to provide Claims. (01. 254-187) a 'hoistof the kind above described wherein'tlie driving gears are equipped for quick and easy application thereto, or removal therefrom of a crank whereby the cable winding drum is to be powered. g I Still other objects of the invention residein the details of construction ofvarious parts, in their combination, and in the mode of operation ofv the device, as will hereinafter be fully de scribed.

In accomplishing these andfotherobjects of the invention, I have provided the improved details of construction, the preferred forms of which are illustrated in the accompanying drawings, wherein:

Fig. l is'a side view of a hand hoist or winch embodyingthe novel featuresof the present invention.

Fig. 2 is an end view of the same, showing the inner end frame structure and the hub shaft location of the various gears to which the splined stub shaft of the hand crank may be applied for turning the cable drum. v f

Fig. 3 shows a detail of construction of the outer end support of the hoist frame. i

Fig. 4 is a horizontal, line 44 in Fig. 2. 1

Fig. 4a. is-a sectional detail, showing theunrmeshing of gears for free unwinding of the cable drum. 1 I

Fig. 5 is a vertical, cross sectional detail on the line 5-5 in Fig. .4, with parts broken-away for better illustration. Fig. 6 is a sectional detail through one of the driving gears, taken on line 3-6 in Fig. 2.

Fig. 7 is an inside elevation of one of the driv ing gears of the cable drum, showing the disposition of the brake band therein and the connection of the band with the hand braking lever.

Fig. 8 is an enlarged sectional detail on the line 8-8 in Fig. 7. M

Fig. 9 is a perspective view of parts ofthe braking means.

Fig. 1 0 is a perspective view of the hand crank for turning the winchdrum.

Referring more in detail to the drawings: The present hand winch comprises a cable winding drum having a cylindrical body'portion' 5 of suitable length for holding a predetermined length of cable, and equipped at its oppositejends' with cable retaining flanges 6 and "I. Mounted on the drum is, a cable 8, anchored atits end; the drum, as at 9 inFig. 4. The, drum S-isequipped within itsopposite end portions with co axial bearings Ill-I0 in which the drum supsectional view taken on orting shaft I 2 is revolubly contained; this shaft being mounted at its ends in upright supporting frames, or pedestals, l3 and M, which hold it rigid and against rotation, and which frames are adapted to be rigidly mounted upon a foundation or support.

The end flange 1 of the drum has a peripheral, cylindrical flange l5 equipped internally with gear teeth, thus to constitute an internal ring gear l8 through which the drum is turned to wind the cable thereonto.

As will be observed best by reference to Figs. 1 and 3, the supporting frame I3 is what is usually referred to as an A frame. At its vertex it is formed with a bearing portion 28 designed to receive one end of the shaft 12 therein. This bearing is longitudinally split at its top side for a purpose present apparent. From the bearing 20, the legs 2l2l of the frame extend downwardly in divergence; by a transverse brace member 22 and being equipped at their lower ends with feet 23 that are bored with holes to receive anchor bolts or the like, as designated at 24 in Fig. 1, whereby to secure the frame to a foundation or support. Ears 25-45 extend upwardly from the bearing at opposite sides of the split or division therein, as seen in Fig. 3, and a clamping bolt 26 is extended through openings in the ears, and carries a nut 26 designed to be tightened, thereby 1 these legs being joined to cause the bearing to be drawn tight about the shaft end therein, thus to hold the shaft against rotation and to render this frame and the sh'aft relatively rigid.

The frame 14 which is best shown in Figs. 1 and 5, is an upright, transversely disposed structure equipped at opposite ends thereof with feet iii-=28 that are bored for reception of anchor bolts 24' to secure this frame rigidly to a base or foundation. This frame has an inwardly extended centralbearing 29 in which the adjacent end portion of shaft {I2 i fitted and secured by a pin '30, as noted in Fig. 4. At one side of the bearing 29, the frame I4 is formed with a bearing 32 in which a cylindrical hub member 33, which mounts a relatively large power transmiss-i'on gear wheel 33 thereon, is revolubly fitted and is also longitudinally shiftable a limited distance. Atits inner end, the hub member 33is'external'ly toothed to form 'a relatively small pinion gear 35 thereon which, by an endwise shifting of "the hub member 33, may be moved into and from driving mesh with the internal-ring gear 18, as will be best understood by reference to Figs. 4

The gear wheel 34 has a hub portion 34:0 fitted about the cylindrical hub 33 's'o thatthe latter maybe shifted endwise therein, but the hub 33 and the wheel '34 are keyed together by a roller key is that is set in a longitudinal key slot C in the :gear hub 343: as shown in Figs. 4 and 5, thus at all times to maintain a driving connection between parts 33 and 34,

The outer end portion of the hub '33 extends through and beyond the hub 34:13 of gear wheel 34. This outer end portion, whichis designated at 33 in Fig. 4, is revolubly-fitted Within a bearing 36 that is formed within a supporting frame 31. Frame 3! i upright and is disposed outwardly from and parallel with the frame l4 and is rigidly supported therefrom; this'outer frame being hereinafter referred to as the extension frame. The means of support for the extension frame comprises a plurality of legs 31' that are integral therewith and which are extended in- 4 wardly therefrom and are secured by bolts 38 to the frame M, as is clearly shown in Fig. 2.

Disposed between the end frame 14 and the extension frame 31 are gear wheels 49 and M which are in driving mesh with the gear wheel 34. In the present preferred ratio of parts, the gear 34 has sixty teeth, the gear til has twentyfour teeth, and gear 4| has fourteen teeth, while gear wheel 35 has twelve teeth and the internal gear l8 on the drum flange has forty-eight teeth. As will be understood by reference to Fig. 4, the gear wheel 40 has, at its outer face, an outwardly extended, cylindrical hub portion 55 that is revolubly contained in a bearing 4% in frame 37, and at its inner face, has a similar inwardly extended hub portion 4'! revolubiy contained in a bearing 48 in frame l4. Likewise, the gear 4|, see Fig. 6, has tubular hub portions 49 and 5f! extendng outwardly and inwardly therefrom at outer and inner faces, respectively, and these are revolubly contained in bearings 5i and 5.2 in frames 37 and Hi.

The hub member 33 and the hub portions of the gear wheels All and M are tubular and it will here be mentioned that the open outer ends of these tubular members open through the outer frame plate 31 for the application of a hand crank thereto for winding in the cable onto the drum.

In the present instance, power is applied to the winch by means of the hand crank, and this power may be applied selectively through any one of the three gears 40, '4! or 35170 obtain the desired gear ratio. The crank used in this instance, as seen in Fig. 10, comprise a lever arm 55 equipped at its outer end with a handle 56. At its inner end, the lever arm is adjustably fixed in 'a guideway on a block 58 and is adapted to be held at different positions of extension from the block by set screws 59 that are threaded into the block and which may be tightened against the lever.

Fixed to the block 58 is a stub shaft -68 of such diameter that it may be applied coaxially within the cylindrical hub member 33 or within any of the hub portions of the various gear wheels. This stub shaft has a short length thereof 68s adjacent the block 58 enlarged to such diameter that it will form a slip fit within the outer end portion of any of the gear hubs, and this part of the shaft is longitudinally grooved, as at 68g in Fig.- 10. Also, each of the tubular hubs has its outer end portion internally 'splined, and these splines 69 will engage within the grooves 68g of the hub 68 to efiect a driving connection between the crank and the gear to which it maybe applied.

The grooves 68g are slightly wider than the splines which they receive, and at the open ends, have shoulders 68:1: restricting entrance thereto. Thus, when turning force is applied to the crank, the shoulders look back of the ends of the splines to prevent the shaft from being accidentally released.

It is to be noted by reference to Fig. 4, that the inner enddiameter of the tubularhubs-ofthe various gears, are reduced to such diameter that when the inner end portion of the stub shaft is applied thereto, it also will have a snug fit, thus to-give a, longer and more substantialbearing for the shaft.

It will be understood'th'at since the crank 55 with "its mounting block 58 and the integral stub shaft '85 may be applied directly 'to the outer end portion 33' of the hub 33, the drum 5 may then givinga reduction of ten to- 'one, Likewise, if the craiik l-i's applied to gearfwheel ,4] then th reduction through gears'4l, 34, 35 and I is twentyfour to one. It will be understood that thegear wheels illflan'd 4| merely idle 'o n the gear fwheel 34, when the power 'is applied directly .to gear 35. Furthermore, more gear. wheels corresponding' to ear. wheels 40 and 4|, butlo f differentdi:- ameter, could'be applied to the framesain mesh with gear 34 if additional fg'earf ratios should be desired-.1,-

For'free unwinding of thedrum, it is only necessary to pull the hub member 33 outwardly to the position shown in Fig, la, and at whichposie tionthe gear 35 isentirely. disengaged from the internal gear l8. This shifting; ofv the hub'member 33 may be effected by hooking a tool within the hub and pulling outwardly, or, when the turning crank is applied thereto, it affords a holding connection due to the fact that the shoulders 88x will engage the ends of the splines. By turning the crank to cause the ends of the splines 69 to mesh with the restricted entrances to the shaft grooves 689, the crank can be easily pulled out.

It is observed, by reference to Figs. 4 and 4a, that the driving connection between gear 34 and hub 33 is always maintained by reason of the key K.

In order to retard the rate of unwinding of the drum under load, I have provided a brake therefor, as seen in Fig. 7. This brake comprises an internal expanding brake band fitted within the tooth flange of gear wheel 34. One end of the band 10 is anchored to a lug on the end frame l4, as shown in Fig. 5, while the other end is seated within a notch 16 in one end of a lever arm 19 pivoted on one end of a pin 80 that extends through 2. lug 8| cast on the frame l4. Pivoted on the other end of this pin 83 is an upwardly extended brake lever 83 formed at equal distances from the axial center of the pin 80 with holes 85 which may be selectively registered with a hole 83 in an offset end portion of the lever 19 to receive an attaching bolt 88, as is shown in Figs. '7 and 8. Thus, by means of the lever arm 83, the brake band may be expanded to apply braking pressure to the gear flange. When braking pressure is removed from the lever, a coiled spring 89, attached to the frame and to the free end of the band, draws the band free of the wheel flange.

In order that the drum may be held against unwinding at any set position, I have provided a latch pawl 90 that is mounted on a pivot stud 9| fixed on the frame Iii. This pawl has its free end portion positioned to drop into engagement with teeth of gear wheel 34. To release the pawl, there is provided a spring 95 fixed thereto as seen in Fig. 2, which may be moved between notches 96--9!i' in an arcuate rib on the frame to hold the latch in raised or in engaged position.

On the end of the brake lever, as noted in Fig. 7, and extending beyond the pivot pin 80, is a short foot 83' that will engage the frame to limit the swing of the brake lever 83 toward brake releasing position.

With the p-arts constructed as described, it will be apparent that in the assembly of the frame, which comprises the shaft I2, end frames I3 and I4, and the extension frame 31, the parts l3 and llwill readilyadjust themselves toun-w evenness of any, foundation .on which the hoist is to be attached.v Then, after the parts l.3..and l4 have been secured to the'foundation, the bolt 26 isdrawntight vto'give support to the opposite end. of the shaft, and. this renders the wholestructure rigidwithout any strain or tortion being applied to any parts. 1 1

It will also be understood that by the particular'assemblybf ,the' frame 31 on frame [4, as shown, the'mounting hubs of gearwheels 40,. and 34. will be adequately supported, and: in a manner. that avoids any; unnecessary friction.

Furthermore, by making the gear hub portions integral with: the gears, .weight is. reduced and high costs 'of manufacture' avoided.

The provisions'of the three speed driving gearing givesa rangejthatbest suits the operators ability. and atthe sa-metime makes possible the selection of the most practical speed of operation ofthe'drumx...

The feature :of greatest importance in 3 this assemblyisthat the strain applied tothe winding drum cannot cause any binding, strainer distortion' on the gear. ,assemb1ies,:'and thisisdue to the fact that the :frame, l4 carries thedrum-shaft and" also supports the gears therefrom. Therefore, if there is displacement of the frame [4, all gears are moved accordingly without any change in their relationship.

Having thus described my invention, what I claim as new therein and desire to secure by Letters Patent is:

1. A hoist of the character described comprising, a main frame structure including opposite end pedestals and a cross shaft mounted thereby, a cable winding drum revoluble on the cross shaft having an end flange and a driving gear on said flange coaxial of the shaft, an extension frame member removably fixed to the end pedestal that is adjacent said driving gear and spaced outwardly therefrom, a second gear wheel located between said extension frame member and its supporting pedestal, having hub portions at its opposite sides revolubly mounted in the pedestal and extension frame, a gear pinion integral with the hub portion of the said second gear wheel in driving mesh with the first mentioned gear wheel, a plurality of pinion gears of different diameter located between the extension frame and its supporting pedestal, and having hub portions at opposite sides revoluble in bearings in the extension frame and supporting pedestal; said pinion gears being in driving mesh with the said second gear wheel and said second gear wheel and said plurality of pinion gears each havinghub portions exposed through the bearings in the extension frame and a hand crank selectively applicable to any of said portions for the transmission of power to the cable drum.

2. A hoist as in claim 1 wherein each of said gear wheels to which the hand crank is applicable has a tubular hub, and said hand crank has a shaft that is applicable to said hubs in a positive driving connection.

3. A hoist of the character described comprising' an end frame adapted for fixed mounting on a support, a drum mounting shaft rigidly fixed at one end in the frame, and extending laterally from one side thereof, a cable winding drum revoluble on the shaft, and having a driving gear thereon adjacent the said end frame, an extension frame fixed to the end frame on the side thereof opposite the drum, and a driving pinion for the drum gear, having a hub portion mounted by and extending between the said end frame and extension frame for endwi-se movement to disengage its 'gear from the drum geana driving gear keyed on said hub between the end frame and extension frame, and a driving pinion meshing therewith, and having huh ends mounted in said frames, and means ifor rotating thelast men tioned pinion.

4, In a hoist of the character described, a frame, a shaft fixed in the name, a cable winding drum revoluble on the shaft having a coaxial driving gear wheel at one end thereof, spaced frame members at that end of :the drum, a pinrality of trains of power transmission gears of difierent gear ratio located between the spaced frame members; each -train leading to a common gear meshing with the driving gear wheel of the drum; said gears of the gear trains having .hub portions revoluble in aimed bearings of the spaced frame members and with one end :of each hub portion equipped to receive a crank shaft for driving the gear'train to turn the drum.

'5. A combination as recitedin claim 4 wherein said common gear of the several gear trains has a :hub member mounted for .endwi-se movement to disengage its gear :irom the driven gear.

SIDNEY s. McIN'I'YRE.

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

5 UNITED STATES PATENTS Number Name Date 949,229 Gruenfeidt Feb. 15, 1910 1,101,473 Schwinnen June 23, 1914 1,915,923 wilder Feb. 20, 1923 10 1,596, 27? Beebe Aug. 17, 1926 L n-3,439 Francis June 13, 1933 1,936,642 Ramsey Nov. '28, 1933 1,977,840 Adams. Oct. 23,1934 2,010,522 Lewis Aug. 6, 1935 16 2,088,469 Benson June 8, 1937 2,178,280 Hutchins, et a1 Oct. 31, 1 939 2,243,789 Benson May 27, 1941 FOREIGN PATENTS 2'9 Number Country Date Y 23,553 Greatiaritain 1896 210,146- Great Britain May 5, 1927

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