US1768278A - Hoist - Google Patents

Description

June 24, 1930, D. wHrrAKER, JR

HOIST Filed Novfu, 192s s sheets-sheet s CII Patented June 24, 1930 4PATET ROBERT I). WHITAKER, JR., OF TAHLEQU'AH, OKLAHOMA HOIST Application filed November 11, 1926. Serial No. 147,768.

invention from among various other forms,

arrangements, combinations, and constructions of which the invention is capable within the spirit and scope thereof.

It is an object of the invention to provide a power driven hoist of the portable or semiportable type, particularly adapted for mounting on and use with an automotive or other vehicle for transportation thereby to and from various points of operation and use, such for example as wells, for operation to rai-se and lower tools, implements, casings, bailers, and the like therefrom and thereinto, or for various other hoisting uses and operations.

Another object of the invention is the provision of a motor driven hoist in which a winding drum is operatively coupled with the motor by clutch mechanism for hoisting and is uncoupled from the motor for gravity 3G lowering with reversing means ooerated from the motor for relieving the load on the clutch mechanism to permit of readily uncoupling or disengaging the same to free the drum for gravity lowering therewith.

A further object of the invention is to provide hoisting apparatus of the type in which a winding drum is driven through operative connections from a motor for power hoisting, and clutches are included between the motor and between'the drum, and such connections, for uncoupling the motor and drum for gravity lowering, with reverse mechanismfor the connections driven from the motor and rendered operative upon disengaging the motor clutch to allow of readily disenraging the drum clutchV by relieving the load therefrom, for gravity lowering by and with the disengaged drum.

Another object of the invention is to provide a design, arrangement, and construction of hoist of the foregoing general type and characteristics, which will be positive and efficient in operation and use, readily operated through the medium of a minimum number of operator controlled members, and capable of general use in various hoisting operations.

With the foregoing and certain other objects and results in view, which will be apparent from the following explanation, the invention consists in certain novel features in construction, and in combinations and arrangements of parts, as will be more fully and particularly referred to and specified hereinafter.

Referring to the accompanying drawings, in which similar reference characters refer Ato corresponding parts throughout the several figures thereof:

Fig. l, is a view in elevation of the hoist taken from the motor clutch and drum clutch side thereof.

Fig. 2, is a view in elevation, similar to Fig. l, taken from the opposite, or reversing mechanism side, thereof.

Fig. 3, is a view in top plan of the hoist.

Fig. 4, is a view in transverse cross-section of the apparatus Vincluding the base taken on line (3*6 of Fig. 3.

Fig. 5, is a detailed -sectional view of the eccentric bearing mounting for the reversing mechanism. y Y

Fig. 6, is a View in side elevation of a modified form of eccentric bearing of Fig. 5.

The embodiment of the invention presented herein and disclosed inl the aecom-` vpanying drawings, isl designed as a portable hoist for mounting on and transporting with a motor truck or the like. However, it is to be understood that the embodiment and use shown herein is purely by way of eX- ample and not of limitation, and that a hoist embodying the principles and features of the invention is capable of general use for hoisting or other purposes, and for mounting as portable, semi-portable, or fixed apparatus. Y

According tothe particular embodiment hereof, a hoist of the invention includes a bed, base or supporting frame 10, embodying the side or longitudinal beams 11, trans- Vverse end beam 12, and the spaced 'transverse braces or cross beams 14, with the end cross beam spaced inwardly a distance from the frame end opposite the end beam 12, as will be clear by reference to Fig. 3 in particular of the accompanying drawings. The bed or base is not limited in any manner to the particular construction shown herewith, but is formed as the support or base on and upon which hoisting apparatus of the invention is mounted, and the design and arrangement of the base or bed is determined by the supportupon which the bed or base itself is to be mounted.

At the closed end of frame or base 10 adjacent end'beam 12, and in this instance between beam 12 and the adjacent cross brace or beam 14, a source of power is mounted, such as the internal combustionv motor M mounted and disposed across and transversely of such end of the base. At one end of motor M a-friction clutch 15 is operatively coupled therewith in the usual or any other desired manner, and includes the movable clutch disc or plate 15 for movement to and from operative engagement with the motor. The disc 15 is movably mounted on .the shaft 16 extended outwardly therebeyond, and a sprocket wheel 17 is fixed on said shaft for rotation therewith. At the opposite end of motor M a friction gear or wheel 18 is mounted for operation by the Vmotor, as by extending the crankshaft and mounting friction wheel or gear 18 thereon.

Pit the end of frame or base 10, opposite the end on which motor M is mounted, a winding or hoisting drum 20 is mounted `between the 'longitudinal beams 11, on a shaft 21 extending across and between beams 11 `and journaled in bearings 22 carried by these beams (see Fig. 3). Drur 2O is fixed to shaft 21 for rotation therewith and a clutch mechanism is provided for driving shaft 21 and drum 20. In this instance a gear 23 of the sprocket type is loosely mounted on shaft 21 adjacent one end of drum 20, and -on its outer face carries one plate 24 of a square or boX type of clutch. The other plate'25 of the vclutch is keyed to shaft 21 for rotation therewith Vand sliding movement thereon to and from operative engagement with clutch plate 24 and gear 23, so that in operative, clutched engagement of plates 24V-and 25, rotation of gear 23 causes rotation of plate 25 and shaft 2l with drum 2O fixed thereon. Any of the suitable or desired operating means for movable clutch plate 25 can be provided,

such as the lever handle 26 `diagranimaticfally disclosed in the accompanying drawing and operatively coupled with plate 25 for moving the same to and from engagement, as will 'be readily understood by those ski'lledin the art'. y s

Brake mechanism is provided for controlling drum 20, and comprises a brake drum 27 formed at and around the inner end of the hoisting drum, with a brake band 28 mounted in operative relation therewith for permits of a simplified arrangement of opg:

erating mechanism for the brake and the mounting of thebrake lever 29 adjacent the clutch lever 2-6, so as to localize or centraliZe these operating levers at a point within easy reach of an operator.

Adjacent the motor M, a shaft 30 is mounted transversely across frame or .base 10, with its outer ends journaled in bearings 31 mounted on the side beams 11 of the frame, and a sprocket wheel or gear V32 is fixed on shafty 30, in line with the gear on motor shaft 16, and these sprockets are operatively connected by the chain 33 eX- tending thereover and therebetween for driving shaft 31 Afrom motor M. The shaft 30 is suitably split or divided and a change speed transmission 34 is interposed therebetween and coupling the shaft to permit -of changing the speed and power atk which the driven section or end of shaft 30 is operated. Preferably,although notso limited, the transmission 34 is of the threespeed type and is controlled'and operated in the usual manner by any suitable manually actuated operating means.y By the provision of the change speed transmission the hoisting apparatus is enabled to handle aV wide range of loads with efficiency, as will appear hereinafter. At the driven end or section of shaft 30, opposite the driving end or section on which sprocket 32 vis mounted, a sprocket wheel or gear 35 is fixed for rotation by and with shaft 30.

A line shaft 36 is mounted transversely of and across the frame ory baselO, parallel y with and between shafts 20 and 30, and is jcurnaled in bearings 37 on the side beams 11. A sprocket wheel or gear 33 is fixed onshaft 36 for rotation therewith, in line with the drivensprocket 35 on shaft 30, and is operatively connected with sprocket 35 for operation therefrom by chain 39. At the opposite end of shaft 36, a gear or sprocket 40 Vis iiXed thereon for rotation therewith, in line and operatively connected l with sprocket 23 loosely mounted on shaft 21, by the chain 41. Thus, the line shaft 36 connects shaft 21, through chains 41 and 39, with the drive and transmission shaft 30,

which is connected with motor M, through i, f

clutch and chain33. By engaging clutch 15 the motor M drives transmission shaft 30, and in turn shafts 36 and the loose sprocket 23 on drum shaft 21. When it is desired to operate drum 2O for hoisting, the square or box clutch plate 25 is slid by lever 26 into engagement with clutch plate 24 of sprocket 23, and the shaft 21 with drum 20 thereon is rotated for power hoisting from the motor M, through the hereinbefore described operative connections. Upon completion of the hoisting or lifting operation, clutch plate 25 is disengaged to release shaft 21 and drum 20 from driving sprocket 23, and the brake is operated through lever 2'9 to hold drum 2O in position. The gravity lowering operation can then be carried out by releasing brake 27-28 to permit rotation of and unwinding by drum 20, the drum being controlled during this operation by the brake through lever 29, as will be readily understood.

In order to simplify control and operation, the friction clutch 15 is operable and controlled from the opposite end of the frame or base, adjacent the operating levers 26 and 29, by the rod 42 and connections extending therefrom to movable clutch plate or dise 15 of clutch 15, this clutch operating mechanism being of the usual or other desired type and more or less diagrammatically shown herein and described. Similarly, a motor control is provided (not shown) operable throughhand lever 44, at the control end of the apparatus for controlling the motor M during hoisting operations. Preferably, the operating mechanism for shifting or changing the transmission 34, is operable from the control point of the apparatus, that is at the drum end adjacent the above referred to operating levers, although it is not deemed necessary to show such transmission operating mechanism, which can be of any of the familiar types of the art.

In the operation and use of the hoisting apparatus as above described, it is found that difliculty is encountered in disengaging the square or box clutch 24-25 between the shaft 21 and sprocket 23, with the load in hoisted position, due to the transmission of the load onto this clutch tending to force and hold the same in engaged position. The present invention provides as another feature thereof, for the elimination of this dii-Ticulty, by means operable simultaneously with release of motor clutch 15, for reversing sprocket 23 and clutch plate 24 to release or relieve the load on clutch 24-25 and permit of its being readily disengaged by hand lever 26. In the particular example of this feature shown herewith, a friction gear or wheel is mounted on a stub shaft 46 in a suitable eccentric or movable bearing 47 supported on frame 10 by a bracket or the like 48, with gear 45 in alinement with the motor carried and driven friction gear 18. The mounting of friction gear 45 is such that it is normally spaced from and out of engagement with gear 18, but by the eccentric bearing can be swung toward gear 18 to engage the periphery thereof and be driven thereby. On the inner end of shaft 46, a sprocket gear 49 is mounted for rotation by shaft 46 and friction gear 45, and is operatively connected to line shaft 36 through chain 50 and sprocket gear 51 fixed on shaft 36. With motor clutch 15 disengaged and friction gear 45 engaging and driven by motor gear 18, the line shaft 36 and mechanism operatively connected therewith are driven in the reverse direction with the result that clutch plate 24 is rotated in a direction opposite to that which the load imposed on clutch plate 25 tends to rotate the same, and the load is relieved from clutch 24-2'5 to permit of ready disengagement, for gravity operation of the drum 20, controlled by the drum brake.

Operating mechanism is provided for the movable friction gear 45 to engage and disengage the same with motor driven friction gear 18, and such mechanism is coupled with and actuated by and from the motor friction clutch operating mechanism 43 for simultaneous operation therewith, to engage gears 45-18 upon disengagement of clutch 15, and to disengage such gears on operative engagement of clutch 15. As an example, a rocker lever or rod 52 is mounted for rotation, and is provided at one end with the arm 53 pivotally connected to the clutch operating lever means 42, and at the opposite end with the arm 54 pivotally connected by a rod55 to the eccentric bearing of friction gear 45, sothat upon operation of rod 42 the means 43 connected therewith will rock rod 52, and through arm 54 and rod 55 move gear 45 to and from engagement with gear 18. The arrangement is such, that when means 43 is operated to disengage clutch 15, the gear 45 is moved into operative engagement with gear 18 to cause reversing of shaft 36 v andv clutch member 24, and when 43 is operated to engage clutch 15, gear 45 is moved from engagement with gear 18. In this manner operation of clutch 15 and of the reversing gears 18 45 is performed simultaneously from and by ,operation of the manual control lever 42.

The hoist shown and described herein is Vtion gears 18-45 and reverses rotation of shaft 36 and sprocket and clutch plate 2d to release the load on the clutch 24-25. Upon operation of the reverse mechanism to release the clutch load, lever 26 can be actuated manually to permit of readily disengaging clutch 2li-25, after which the load can be lowered by gravity, drum freely rotating to unwind the cable, under control of drum brake 27-'28, through brake lever 29. The hoisting and lowering operations above dcscribed can-then be repeated and continued as required.

Referring to Fig. 6, la modified form of eccentric mounting for 4the reversing friction gear is shown. In this form of vmounting,a bearing 70 is provided in which an eccentric disk '7l isvrotatably mounted. This disk 71 isprovided with and carries a laterally disposed and inwardly extending pin or stub shaft 72, which is mounted on the 'disk eccentrica'lly with respect to the aXis of rotation Yof the disk. Upon Vthis stub shaft 72, the reversing friction gear 15, is rotatablymounted. An actuatingarm 73 is secured to the disk V7l4 for rotating the same, for the lower. end of. this .arm 73 is operatively lcoupled with the rod 55, so that upon operation of rod in the proper direction, the Adisk 7l is rotated in the bearing 70 and the shaft 72 is swung or moved to carry gear 45 into operative .enga-gement with the motor `gear 18 to thereby .cause reversing operation of the shaft 36 and the sprocket 23 in a manner and for the purpose hereinbefore described.

While the fundamental and main object and purpose of the reversing mechanism for the hoisting apparatus Yas ya-bove described is to remove .the load from the winding drum clutch mechanism, to permit of readily disengaging this clutch, attention is directed to certain further uses and advantages thereof. The reversing mechanism is of vutility to lower .a load when .the weight of such load is not suticient to unwind the drum by gravity. It is of further utility as an aid lor help to the brake when the load is too heavy for the brake mechanism toy safely control :the lowering of the same by gravity.

Obviously, the various features of the invention arenot coniined to the .portable type of hoist shown or yfor .any .particular hoisting operations.

By hoisting apparatus of the invention, efficient operation in power hoisting and gravity lowering is possible, with the elimination of diihculty in disengaging the loaded drum from the power Vdriven operating mechanism when it is desired to permit free rotation of the drum by gravity for lowering a load.

It is also evident that various modifications, variations, changes and substitutions might be resorted to without departing from the spirit and scope of my invention and hence l do not desire or intend to limit myelf to the exact and specific disclosures hereof.

`What claim, is:

l. ln hoisting apparatus, a motor, a hoisting drum, operative connections lfrom the motor to the drum for driving the latter, clutch mechanism between the motor and said connections, clutch mechanism between the drum and said connections, and means driven by the motor for releasing the load on the drum clutch mechanism to permit of disengaging the same, when the clutch mechanism between the motor and said connections is disengaged. Y

2. in hoisting apparatus, a motor, a hoistino` drum, driving connections from the nir-tor to the drum, clutch mechanism ,be-

tween the motor and said connections, clutch mechanism between the drum and said connections, and means independent of the clutch mechanism between the motor and said connections for reversing lsaid connections to release a load from the drum clutch( mechanism upon disengaging said motor clutch. f

A3. In hoisting apparatus, a motor, a hoisting drum, driving mechanismV l from the motor to the drinn for rotating .the latter, clutch mechanism between the drum and driving mechanism, clutch mechanism between the motor and driving mechanism, and normally inoperative means independent of said clutch mechanisms operated by the motor upon disengaging the motor clutch for reversing said driving mechanism to release a load on the drum clutch.

4. In hoisting apparatus, a motor, a hoisting drum, driving mechanism from the motor to the drum for rotating the latter, clutch mechanism between the motor and the drum driving mechanism, operating means for engaging and disengaging said motor clutch, clutch mechanism between the drum and driving mechanism, and normally inoperative means rendered operative and driven from the motor for reversing .the driving mechanism upon disengagement of the motor clutch to release the load on the drum clutch mechanism, said reversing means being operatively Yconnected with the motor clutch operating means :and rendered operative by actuation of said means to disengage said motor clutch.

5. In hoisting apparatus, a motor, a shaft disposed substantially parallel with the motor, a chain from the motor to said shaft, clutch mechanism between the motor and said chain, a second shaft, a chain from the first shaft to said second shaft, a hoisting drum, a chain from the second shaft to said drum, a clutch between the drum and the chain driving the same, a friction gear operatively coupled with said second shaft, a friction gear on the motor, said first mentioned friction gear being mounted for Inovement to engage the motor gear to reverse said shafts with the motor clutch disengaged to relieve the load on said drum clutch.

6. In hoisting apparatus, a motor, a hoisting drum, driving connections from one end of said motor to said drum, a clutch between the motor and said connections, a clutch between the drum and said connections, a friction gear at the opposite end of the motor, a second friction gear operatively connected with said driving connections and movable to engagement with said motor friction gear with the motor disengaged for reversing said driving connections to relieve the load on said drum clutch to permit of disengaging the same.

7 In hoisting apparatus, a motor, a hoistn ing drum, driving connections from the motor to the drum for rotating the latter, a clutch between the motor and drum driving connections, gearing for reversing rotation of said driving connections driven from the motor, said gearing being inoperative with the motor clutch engaged and operative with the clutch disengaged, and control means for simultaneously operating said clutch and reverse gearing.

Signed at Tahlequah, county of Cherokee, State of Oklahoma, this l2 day of October,

ROBERT D. WHITAKER, JR.

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