US2772072A - Hoist - Google Patents

Description

3 Sheets-Sheet l HOIST Nov. 27, 1956 H. F. PARKER ETAL Filed Jan. 4, 1954 NOV- 27, 1956 H. F. PARKER x-:TAL

HOIST 3 Sheets-Sheet 2 Filed Jan. 4, 1954 andER/-ORD E. Ro/Ns Myfm,

ATTORNEYS,

Nov. 27, 1956 H. F. PARKER x-:TAL .2,772,072

HoIsT Filed aan. 4, 1954 s sheets-sheet s IN V EN TORS HUMPHREy/- PARKER BigndER/:ORD E. Ro/Ns United States Patent O HOIST Humphrey F. Parker, Buialo, and Erford E. Robins, North Tonawanda, N. Y., assgnors to Columbus McKinnon Chain Corporation, Tonawanda, N. Y.

Application January 4, 1954, Serial No. 401,846

11 Claims. (Cl. 254-167) This invention relates to industrial hoists, and more particularly to motorized chain or cable hoists of the type adapted to be suspended by means of hooks from suitable supports, for the purpose of lifting and lowering loads in connection with industrial operations.

It is an object of the present invention to provide an improved hoist frame and suspension hook interconnection arrangement, whereby a hoist of reduced head room requirement is provided.

Another object of the invention is to provide a hoist as aforesaid wherein the suspension hook component thereof is mounted in the hoist frame in improved manner so as to provide increased strength and rigidity in the frame and suspension hook assembly.

Another object of the invention is to provide an improved hoist as aforesaid wherein the suspension hook element of the hoist is engaged to the hoist frame by means of a connection bracket of novel and improved form.

Still another object of the invention is to provide a novel and improved suspension hook mounting bracket device adapted for detachable connection to a split frame type hoist in improved manner.

Another object of the invention is to provide a novel and improved suspension hook mounting bracket device adapted for detachable connection to a unitary frame type hoist, in improved manner.

Another object of the invention is to provide, in combination, a novel hoist frame design and a novel suspension hook mounting bracket.

Still another object of the invention is to provide in a hoist as aforesaid, a novel frame design and a series of novel type suspension hook mounting brackets adapted to fit interchangeably into said hois-t frame, whereby a single hoist frame is adapted to be converted to a variety of lift strand reeving arrangements.

Other objects and advantages of the invention will appear from the specification hereinafter.

In the drawings:

Fig. 1 is an end elevational view, with portions broken away in section, of a single reeve type chain hoist device of the invention;

Fig. 2 is a fragmentary sectional view, taken along line II-II of Fig. 1;

Fig. 3 is a sectional view, taken along line llI-l1I of Fig. 1;

Fig. 4 is a view corresponding generally to Fig. 1, but of a double reeve type chain hoist embodying a modified form of suspension hook mounting bracket of the invention;

Fig. 5 is a fragmentary section, taken along line V-V of Fig. 4;

Fig. 6 is a fragmentary section, taken along line VI-Vl of Fig. 4;

Fig. 7 is a section, taken along line VlI-VII of Fig. 4;

Fig. 8 is a fragmentary sectional view through still ICC another form of hoist-frame and suspension hook mounting bracket arrangement of the invention;

Fig. 9 is a fragmentary section, taken along line IX-IX of Fig. 8; and

Fig. 10 is a fragmentary section, taken along X-X of Fig. 8.

In Figs. 1, 2, 3 of the drawing the invention is illustrated as being embodied in an electric motor type chain hoist comprising generally a pair of mating frame parts 12, 14, such as may be conveniently fabricated in the form of die castings of light weight metal, or the like. Assembly bolts such as are indicated at 16 are empolyed to hold the two frame sections in unitary assembled relation, and the motor and drive shaft and gear and brake elements of the hoist mechanism are suitably housed within the two frame sections, as shown in detail for example in our co-pending application Serial No. 239,594 filed July 3l, 1951 now Patent No. 2,667,331. Thus",` the hoist mechanism will typically include a load lift wheel as indicated at 18 (Fig. l); a load engaging hook as indicated at 20; and a load lift chain as indicated at 22 which connects to the hook 20 and trainsover the load lift wheel. The chain 22 is then tied at its dead end portion to the hoist frame by means of any suitable bolt or screw device as indicated at 24. The suspension hook for hanging the hoist mechanism in operative position is illustrated at 25, and is illustrated to include a shank portion 26 for swivelling connection with the hoist frame, as is typical in the art.

ln accord with the present invention a bracket for interconnecting the suspension hook and the frame structure in suitable manner may be provided vas illustrated at 30 in Figs. 1-3. As shown therein the bracket device 3i) comprises a unitary casting or forging or the like which includes a vertical bore 32 for receiving in rotatable relation therein the shank portion 26 of the suspension hook. The lower protruding end portion' of the suspension hook 25 is laterally drilled to receive in press-tted relation ,a pin 34, and a collar or nut as indicated at 36 is also laterally apertured and slip-fitted or screwed upon the lower end portion of the hook shank and locked thereto by means of the pin 34, to transmit the load through the hoist frame to the suspension hook when in assembled relation. A washer 38 is preferably installed between the collar 36 and the hoist frame parts to take the Wear incidental to swivelling of the hook relative to the bracket 30, or if preferred the hook and bracket member may be arranged to prevent relative swivelling motion, by means of any preferred keying or pin arrangement. Preferably, the shank portion 26 of the suspension hook is provided with an enlarged shoulder as indicated at 39 to cooperate with the collar 36 to hold the hook and bracket parts in proper assembled relation.

The bracket member 30 in end View (Fig. 2) is of generally rectangular sectional form. In side view (Fig. 1) the 'bracket includes a central hub portion which roline tatably embraces the suspension hook shank, and ,fromV which diametrically extended cantilever beam portions 40, 42 of tapering vertical thicknesses having their terminal end portions suitably apertured to accommodate vertically disposed mounting bolts 44, 46, respectively. Thus, the bracket member 30 comprises a yoke-like device carrying the suspension hook 25 and adapted to beV connected to the housing structure by means of the bolts 44, 46.

V'nya/2,072

tion'fof the'hoistframe. "To yfacilitate assembly and disassembly offthesuspensionhookand mounting bracket relative tothe frame, the frame parts 12, 14 may conveniently be laterally recessed .at their mating faces as indicatedat 51, 5 2, to fsuicient depthsfto J accommodate one-half the widthsvof-screwthreadedrnut devices-as in dicated at V53, 54. "Hence, priorlo -sub-assembly of the two frame parts 12, 14 by means of the bolts 16, the nuts 53,:54 may 'iirst'be inserted between the frame` parts so that upon assembly ofthe frame parts the nuts are thereby heldin position to receive the bolts 44, 46. Thus, mountingof the suspension hook and bracket upon the hoist structure may easily comprise the-last step of the hoistassemblyf process, the bracket 30 being then simply setinto the complementary recessed portion of the-frame structure 'andthe ybolts 544,46 thrust downwardly through the 'bracket -and into screwthreaded engagement with kthe nuts 53, 54.

` "Tighteningvot the Abolts 44, 46 by means of any'suitable tool :applied to fthe lupper'ends thereof from `externally ofthe mechanism will then draw the suspension bracket 30 snugly downwardly into seated relation in the recessed portion of the frame structure, thereby locking the suspension hook and bracket in improved manner relative to-the hoist frame. Itis a feature of the invention that this mode of mounting of the suspension hook bracket to Vthe frame not only provides a more secure and Stronger and more rigid overall structure, but reduces the overall vertical dimension of the hoist and suspension hook assembly, whereby a hoist of the invention requires less operational head room. t

Itis another feature of the invention that the above described hoist frame and suspension hook mounting arrangement facilitatesadaptability of a single hoist frame structure to a variety of load strand reeving types. For example, as illustrated by Figs. 4, 7, the-mating hoist frame parts 12, 14 maybe suitably apertured to optionally accommodate a load chain carrying a boltti (Figs. 4, 7) which engages in screwthreaded relation at its lower end with a square sectioned shackle block 62 carrying a pin 63 for engagement with the end link 64 of the load lift chain when trained under and then upwardly from aiconventional type lower sheave block 65 which in turn carries the load hook 20. In this application of the invention, -the suspension hook mounting bracket is formed as illustratedf'at 66 to be generally in the form of the bracket Aas illustrated at 30 in Figs. 1, 2, except-that the bracket 66 includes an intermediately vertically reinforced portion 67 which is vertically apertured to accommodate the bolt 60 in sliding relation therethrough. The upper end of the bolt 60 isheaded as yindicated at 68 and the top surface of the bracket 66 is socketed to accommodate the bolt head and to hold it against turning when lowered thereinto, and thus it will be appreciated that when lthe bracket isrnounted in Vsubmerged and snug tting relation-in the hoist frame structure by means of thfgbolts '44, 46, "the bolt 6iirmay irst belifted 'to clea-r its head from .the bracket V-socket and then tightened in` the device 62 and dropped back into the socketsoas to anchor-the load lift chain in the position shown' in Fig. 4. Thus, thefload lift chain is' supported by the :bolt 6 0Vupon-thebracket 66 which in turn transmits this load 4 brackets of the types illustrated at `30 in Fig. l and at 66 in Fig. .4, and an appropriate number of `sheave blocks 65 and chain anchor bolts 4as illustrated at 60 in Fig. 4.

He will thus be equipped to supply any customer with n either single or double reeved type hoists as the customer requires, simply by mounting the proper type suspension bracket into the hoistiframe, and adding the load chain bolt and lower sheave block devices where needed. This greatly reduces the inventory of hoists' required to be'carriedby the;de aler.in order tobe .preparedtdmeet his customers requirements.

It is to b e particularlvnotedthat thepsuspension'fhook bracket for the double reeve type application also diifers from the bracket Eadaptedto'theV single reevetype'application as shown in 'Fig l by virtue-.ofthe lateral disposition of the suspension hookaperture therein relative to the vertical center line of the hoist frame. Thus, for eX- ample, as shown in Fig. 4, the bracket 66 which is adapted for the doublereeve application'isdesigned to dispose the suspension hook 25 midway of theverticallloadrcenter`lines of the 4two strands of chain training upwardly from thelower load sheave block 65, while in the case of the single reeve application as' illustratedin'Fig. `1 the bracket 30 is designed so as to dispose the suspension hook in line with the single load chain strand training upwardly from the load hook 20.v

Figs. 8, 910 illustrate application of'theeinvention to a unitary frame type hoist wherein the hoist tframe isillustratedat 70 to -compriseasingle casting shaped to accommodate'the necessary motor and drive shaft and gear and load lift wheel parts and the like. However, the frame structure 7i) is recessed transversely ofits upper portion as indicated at 72 to accommodate in 'snugly seated relation therein lthe suspension -hookbracket as designated generally lat 74. The hub portion of the bracket 74 is vertically bored as indicated at- 76 to accommodate in freely rotatable relation therein fthe sh-ank portion 77 ofthe suspension hook '78, thesuspensionl hook being formed with a bearing shoulder 79 and a holding collar or nut 80 at its lower end, as explained in connection with the arrangement` of Figs. l-7. The' 4diametrically extending end portions of :the bracket 74 are suitably apertured to accommodate in slidingrelation'therethrough mounting studs 82, 84, the yhoist frame structure '70 being suitably drilled andV tapped -as indicated at'86`, 88 to receive the threaded lend portions 'of the studsSZ, l84,

respectively.

As shown in Figs. 9 and 10, the bracket 74 is of generally rectangular sectional form `and shaped and dimensioned soas to fit snugly downwardlyinto the recessed portion 72 of the hoist frame when drawn thereinto by means'ofthe mounting studs`82, 84. vThus, as previously stated, the suspension hook mounting arrangement provides a more secure and stronger and more=rigid mounting interconnection between the `suspension hook and the frame, while reducing klthe overall:verticalgdimension of the hoist and suspension hook assembly. Whereas,:the drawing `at `Figs. 8, 9, 10 illustrate the hook mounting bracket 74 as being only'of the single reevedfhoist type directly lto the suspension hook 25 inimprovetlV manner,

Vwhereby..;in this instance the Vsuspension hook bracket serves the-*purpose of relieving the hoist frame ofl one halfroftlltloadl supported bythe hook 25.

' :It willalso be appreciated that the hoist frameas il-k lustrated in Figs. 4-7 may be employed with either of the bracketsas illustrated in Fig. l or in Fig. 4, soas to' adapt thesingle hoist frame to either single or double' reeved type hoist arrangements, simply by interchanging thebrackets 30, 66` according to the hoist type desired.

Thus, Ait will'beunders'toodthat a dealer in hoist devices of'this'typewill be required to stock only a `minimum Vsupply `of hoist frames alongV with -an .assortment of as in the case of Figs. 1-3, it will bewunderstoodlthat the bracket 74 is readily interchangeable with anotherfbracket of generally similar design but formedtoaccomrnodate a double reevedhoist arrangement,asexplainedhereinabove in connection with the device illustrated byFigs. 4 to 7. I

It-is of course to be appreciated t* .t various changes may be made in the details ofthe constructions as-shown and described hereinabove without departing from the in vention. For example, the - suspension bracket members 30, 66, 74'may be provided with non-swivelling suspension hook or lug ydevices in ,lieu of the suspension hook devices as shown inthedrawing, so'that the hoist mechanisms may be permanently attached to stationary supports or moving trolleys or the like. Thus, for example, the hook devices as shown may be replaced by externally threaded -studs for connection 'tto .mounting brackets: 'exs tending from overhead trolleys or the like, as may be required. Therefore, although only a few forms of the invention have been illustrated and described in detail, it will be understood that various changes may be made therein without departing from the spirit of the invention or the scope ofthe appended claims.

What is claimed is:

l. A hoist construction including a hoist frame and a supension hook for hanging said hoist in operative position, said hoist frame being recessed in its upper surface portion, and a suspension hook bracket device detachably mounted in substantially submerged relation in the recessed portion of said frame, said bracket device having a central hub portion apertured to accommodate therein the shank portion of said suspension hook and opposed beam portions extending substantially diametrically therefrom for attachment to said hoist frame.

2. A hoist construction including a multi-part hoist frame comprising frame parts having mating surface portions and a suspension device for hanging said hoist in operative position, said hoist frame parts being conjunctively recessed in their upper surface portions, and a bracket device ydetachably mounted in substantially submerged socketed relation in the recessed portions of said frame parts, said bracket device being connected to said suspension device.

3. A hoist construction including a two piece hoist frame comprising two frame parts and a suspension hook for hanging said hoist in operative position, said hoist frame parts each being recessed in its upper surface portion, and a suspension hook bracket device substantially submerged in the recessed portions of said frame parts, said bracket device having its ends bolted to said frame parts and accommodating therein between its ends the shank portion of said suspension hook.

4. A hoist construction including a hoist frame and a suspension device for hanging said hoist in operative position, said hoist frame being recessed in its upper surface portion, and an elongated bracket detachably mounted in substantially submerged relation in the recessed portion of said frame, said bracket being connected intermediate its ends to said suspension device and being connected adjacent its ends to said hoist frame.

5. A hoist construction including a two-part hoist frame comprising frame parts having mating rsurface portions and a suspension member for hanging said hoist in operative position, said hoist frame parts being conjunctively recessed in their upper surface portions, a suspension member bracket device resting `in substantially submerged relation in the recessed portions of said frame parts, at least one of said frame parts being separately recessed below its upper surface recess portion, a threaded nut positioned Within said separate recess, and a bolt extending from said bracket `into said nut for holding said bracket relative to `'said frame, said bracket device being connected to said suspension member.

6. A hoist combination including a hoist frame, a suspension device for hanging said hoist in operative position, said hoist frame being recessed in its uppe-r Surface portion, and a bracket device detachably mounted in substantially submerged relation in the recessed portion of said frame, said bracket device having a central hub portion connected to said suspension device and beam portions extending outwardly therefrom, means detachably connecting said beam portions to said hoist frame, said recessed frame portion being adapted to selectively accommodate generally similar bracket devices having suspension devices connected thereto at diierent positions thereon for different center of load arrangements.

7. A hoist construction including a multi-part hoist frame comprising at least two frame parts having mating surface portions, a suspension member for hanging said hoist in operative position, said hoist frame mating parts being conjunctively recessed in their upper surface portions, and a suspension member bracket device detachably mounted in substantially submerged relation in the recessed portions of said frame parts, said bracket device having a central hub portion apertured to receive therethrough one end of said suspension member and having cantilever beam portions extending outwardly therefrom and connected to said frame parts.

8. A hoist construction including a two piece hoist frame comprising two frame parts having mating surface portions, a suspension hook for hanging said hoist in operative position, said hoist frame parts being recessed in their mat-ing surface portions, a suspension hook bracket elongated `along the juncture between said mating surface portions and connected intermediate its ends to said hook, said bracket being substantially submerged in the recessed portions of said frame parts, and means detachably securing the ends of said bracket to said frame parts for holding said bracket within said frame.

9. A hoist construction including a hoist frame, a suspension hook for hanging said hoist in operative position, said hoist frame being recessed, a suspension hook bracket device mounted in substantially submerged relation in the recessed portion of said frame, said bracket device having a hub portion apertured to accommodate therein the shank portion of said suspension hook and beam portions extending outwardly therefrom, and means detachably connecting said beam portions to said frame for holding said bracket in said frame.

10. A hoist construction as set forth in claim 9, wherein said bracket device -is provided with a peripheral bead extending therearound to form a shoulder fitting over the brink of the recessed portion of said hoist frame.

11. A hoist construction including a multi-part hoist frame comprising frame parts having mating surface portions and a suspension member or hanging said hoist in operative position, .said hoist frame parts being conjunctively recessed in their upper surface portions, a suspension member bracket device resting in substantially submerged relation in said recessed portions of said frame parts, said bracket device comprising a central hub portion connected to said suspension member and beam portions extending outwardly therefrom for connection to rsaid frame parts, said frame parts being further conjunctively recessed in portions thereof below their upper surface recessed portions and in alinement with the terminal end portions of said bracket member beam portions, threaded nut devices positioned within said further lrecessed portions, and bolt devices extending from said bracket device beam portions into engagement with said nut devices for holding said bracket device relative to said frame.

References Cited in the tile of this patent UNITED STATES PATENTS 747,463 Moore Dec. 22, 1903 2,274,280 Stinson Feb. 24, 1942 2,368,039 Parker Jan. 23, 1945 2,426,112 Moore et al. Aug. 19, 1947

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