US1740707A - Hoist - Google Patents

Description

Patented Dec. 24, 1929 UNITED STATES PATENT QiFFil-CE corner 0. .oscoon, or crane-Mom, new HAMPSHIRE, .Assrenoa Eco SULLIVAN Maonmnsiz con-ronarron, A conronarrou or nessacnusn'rrs HOIST Application filed March 17, 1926. Serial No. 95,411.

This invention. relatesto hoists and more particularly, but not exclusively, to double drum portable hoists especially adapted to use with the so-called slusher system of handling ore.

In modern strip. pit and underground metal mining there is a great demand for hoists of the slusher or drag scraper type. Such hoists are of comparatively small, highpowered, compact character; and a pair of winding drums, as for instance a haulage drum and a tail rope drum, is usually provided driven from a common source of power. Drag lines or cables are usually connected to these drums and cooperate with a drag scraper, the latter being movable back and forth relative to the loose material to be handled to convey the latter to a chute or car in a well known manner. It is desirable to .make these hoists readily portable and to reduce the lat eral dimensions thereof to a minimum in such manner as to permit the hoist to pass through the raises of a metal mine with facility.

The main object of this invention is to-provide an improved double drum hoist of comparatively small, high-powered, compact character whose lateral dimensions are reduced to a minimum. More specifically, the object of this invention is to provide an improved double drum hoist in which a pair of winding drums may be driven from a common unidirectional driving motor through a common driving shaft on which the drums may be journaled and improved means for connecting the drums in operative driving relation with this shaft. These and other objects of this invention will, however, subsequently more fully appear.

. .This invention resides in the novel construction, arrangement, and combination of parts as hereinafter particularly described and pointed out in the appended claims and in a preferred form maybe embodied in a mechanism inwhicha driving motor is disposed at one end of a pair of coaxial winding drums and the latter driven throughfa common driving shaft providing a journal therefor,and-independently frictionally controlled reduction gearing. Preferably the motor and drum structures are readily separableto facilitate handling and the parts are so proportioned that the mechanism ,may be passed through any opening adequate in size to pass the drum structure.

In the accompanying drawing I have shown for purposes of illustration one form which my invention may assume in practice.

In the drawing,-

' The figure is a central longitudinal vertical sectional view through the improved hoist, parts thereof being shown in elevation.

In this illustrative construction there is shown a double drum hoist generally designated 1 and h'av'ing a frame 2 which has secured thereto, as by screws 3, upstanding end brackets or supports 4 and 5. As shown, secured at one end to the frame 2 is a supplemental base frame 6' suitably secured thereto, as by bolts 6*; and this base frame forms a support for a motor 7 which may be of the unidirectional electric type although it is obvious that any type of motor may be utilized if desired. The motor 7 is secured to the frame by screws 8. Secured to the armature shaft 9 of the motor 7, as by a suitable key and screw connection 10, is a motor pinion 11, herein preferably of the helical type, and this pinion is meshed with an internal helical gear 12 keyed, as at 13, to one end of a longitudinally extendinghorizontal driving or transmission shaft 1 1 arranged parallel with the motor axis and journaled at its opposite ends in sets of spaced alined ball bearings 15 and 16 carried respectively within the brackets 4i and 5. To prevent access. of dirt or other foreign matter to the gears 11 and 12, there is provided a suitable casing or housing 17 secured, as by screws 18, to the end bracket 1.

Closing the open end of the casing 17 is a detachable cover plate 19, perforated, as at 20, to permit the armature shaft 9 to extend within the casin 17. The cover plate 19 is preferably .suita ly split to permit the removal hereof from the armature shaft 9 of the motor 7 Without necessitating the removal of the motor pinion 11 from the shaft. As illustrated, secured, as by keys 21, adjacent the opposite ends of the shaft 14 are spur pinions 22 and 23. In accordance with this invention, the pinions 22 and 23 constantly mesh respectively with planetary drum driver gears 24 and 25 each of which isjournaled on ball bearings 26 carried by a stub shaft 27. The shafts 27 are respectivelycarried by and extend completely through coaxial windilig drums 28 and 29, as for instance, a haulage drum and a tail rope drum; These drums are disposed between the supports 4 and 5 and are each j ournaled on ball bearings 30 and 31 supported by the transmission shaft.14. Suitably connected to the drums 28 and 29 respectively, are drag line cables orgropes 32. By extending the stub shafts 27 completely through their respective winding drums, it

will be evident that an exceedingly stable support is provided for the lanetary. gears 24 and 25. It will be noted that in this instance the gears 24 and 25 constantly mesh respectively with internal gears 33 and 34 suitably secured to reaction members 35 and 36, .re-'

spectively. The reaction member 35 is. provided with a hub portion 37 suitably carried by thebracket 4 and journaled in roller bearings 38, this hub portion-37 also forming a support for the ball bearings 15. F urthermore, the hub portion 39 of the reaction mem ber 36 projects within'the end-bracket 5 and is suitably journaled in roller bearings 40 carried by the bracket, this hub portion 39 forminga support for the ball bearings 16. Each of the gear portions secured to the reaction members 35 and 36 is externally grooved, as at 41, and suitable brake bands 42 cooperate with the surfaces of the bottoms of these grooves. Suitable mechanism,not shown, for controlling each brake-band 42 is provided which the operator may tighten selectively to hold either or both of the reaction members 35, 36 stationary or loosen to permit free rotation of the latter. As shown, each end of the shaft 14 has secured thereto a'lubricating device 43 through which lubricant, herein'preferably a thick grease, may be trans- .mitted, suitable ducts 43* being provided in the shaft 14 for conducting the lubricant to the various parts of the machine to be lubricated. The adjacent plane end surfaces of the drums 28 and 29 are grooved, as at 44, and loosely received in thesegrooves is a metal ring 45 which prevents access of dirt or other 7 foreign substances to the ball bearings 31.

From the foregoing description it will be evident that the motor may be detached from the base frame 2 and removed bodily from the drum mechanismwith facility, the necessity of dismantling the drums and their controlling and driving mechanism being wholly obviated. Furthermore, it will be noted that motors of different sizes and power may be operatively connected to the drum mechanism with a minimum of change.

In the operation of this improved hoist, it will be notedthat when the motor 7 is running, the transmission shaft 14 and consequently the pinions 22 and 23 are rotated,

though the winding drums 28 and 29 loosely journaled on this shaft may be idle if the brake bands 42 controlling the reaction members 35 and 36 are released so that thereaction members may freely rotate in their respective bearings. If it is desired to rotate the drum 28 to wind in the cable 32 the brake band 42 controlling rotation ofthe reaction member 35 is applied, consequently preventing rotation of the internal gear '33.

' The pinion 22 then causes the planetary gear 24 to roll around the internal gear 33 as a trackway and move with it the winding drum 28. The winding. drum 29 is free to pay out the: cable 32 cooperating therewith, the reaction member 36 being freely ,rotatable at this time. If it is desiredto rotate the drum 29 to wind in the cooperating cable 32 and to pay out the cable cooperating with the drum 28, the brake band controlling the reaction-member -35 is released, permitting free rotation of the drum 28. The brake band 42 controlling rotation of the reaction member 36 is then applied and the internal gear 34 held stationary, the pinion 23 then causing the planetary gear 25 to roll around the internal gear 34 as-a trackway and causing the drum 29 to revolve therewith. It will therefore be evident that through suitable application of the brake bands 42, the winding drums 28 and 29 may be selectively or simultaneously positively driven from the motor 7 and that when the brake bandsare released the winding drums may remain idle during running of the motor. These and other operations of this improved hoist will be clearly apparent to those skilled in the art.

As a result of this invention, it wil be noted that an improved 'doublel drum hoist is provided especially adapted to use with the slusher system of handling ore, wherein a unidirectional motor is utilized for driving thereby greatly reducing the number of different parts. These and other advantages of my invention will be clearly apparent to those skilled in the art; While I have in this application specifically described one form which my invention may assume in practice, itlwill be understood that this form of the same is shown for purposes It will of illustration and that the inventionmay be modified and embodied in various other forms Without departing from its spirit or the scope of the appended claims.

l/Vhat I claim as new and desire to secure by Letters Patent is: j

1. In a hoist, a frame, a driving shaft carried thereby, a driving motor operatively connected to said shaft, a pair of relatively rotatable coaxial winding drums disposed in end abutting relation and rotatable about said shaft, the adjacent ends of said drums having grooved plane surfaces and end chambers for receiving bearings, operative driving connections between said shaft and drums, and a ring loosely received in the grooved ends of said drums for preventing access of any foreign substances to the drum bearings in said end chambers.

2. In a hoist, a frame having endsupports,

a driving shaft indirectly supported-by saidv supports so as to have a projecting end, a pair of coaxial winding drums journaled on said shaft between said supports, a driving motor operatively connected to said projecting end -of said shaft, and operative driving connections between said shaft and said drums 1ncludlng frictionally controlled reaction gears, and supporting means for said re QtlOIl gears rotatably carried by said end supports and' directly rotatably supporting said shaft.

3. In a hoist, a frame including end supports, a driving shaft indirectly supported by said end supports so as to have a projecting end, winding drums rotatable about said driving shaft, 2. motor operatively connected to said projecting'end of said driving'shaft,

drum drivers comprising planetary gears,

one carried by each of said drums, internal gears with which said drum drivers con-' stantly mesh, spur pinions secured to said driving shaft and constantly meshing with said drum drivers, and manually operable friction means for producing rotation of said drums by means of said gearing, said internal gears being provided with hubs journaled insaid end supports which act as bearings for said drive shaft.

4. In a hoist, a pair of coaxial relatively rotatable winding drums rotatably supported in abutting relation, the adjacent ends of said drums having grooved plane surfaces and end chambers for receiving bearings, and a ring loosely received in the grooved ends of said drums for preventing access of any foreign substances to the drum hearings in said end chambers.

5. In a hoist, a prime mover, a pair of rela tively rotatable drums supported in end abutting relation, and means actuated by said prime mover for drivlng said drums including a par of shafts, one carried by each of the drums offset from the axis thereof, a pair of pinions, one carried by each shaft outside the drums, said shafts extending through the drums to the abutting inner ends thereof,

and supports for said shafts at said inner and an internal gear meshing with'each of said pinions.

7. In a hoist, a prime mover, a winding drum, and driving connections therefor including a .drive shaft rotatably supportin the said drum, a reaction gear having a hu journaled on said drive shaft, supportsfor said drive shaft including a member rotatably supporting said hub and through it the drive shaft, and a gear driven by said'prime mover and fixed to said drive shaft on the opposite side of the member supporting the reaction gear from thedrum.

8. In a hoist, a prime mover, a winding drum, and driving connections therefor including a drive shaft rotatably supporting said drum, a reaction gear having a hub ournaled on said drive shaft,'.supports for said drive shaft including a member rotatably supportedsaid hub and through it the drive shaft, a gear driven by said prime mover and fixed to the end of said drive shaft, and a casing secured to the member rotatably supporting the reaction gear, said casing surrounding the gear on the end of the drive shaft.

drums and means for driving said drums from said motor including a drive shaft having a projecting end operatively connected to said motor, said drums being journaled on said shaft between'said standards, and two sets of planetary gearing respectively operatively connecting said drums to said shaft,

one including a reaction gear at one end of said shaft and surrounding said end thereof, and the other a reaction gear at the other end of said shaft and surrounding the last 'men tioned end thereof, said rgaction gears having hubs journaled in said standards and rotatably supporting said shaft.

10. In a. hoist, a base structure comprising a base frame affording seats for the supporting standards of a winding mechanism, ,a' second base frame detachably but rigidly secured tgthe first, amotor mounted solely on said second frame, 'a pair of standards mounted solely on said first fram'egwinding mechanism carried .by said standards comprising two relatively rotatable windingdrums and driving means therefor including a shaft on which saiddrums are journaled and two sets of planetarygearing respectively operatively connecting said drums to said shaft, one in cluding, a reactiongear at one ,end-of sa1d shaft and surrounding said end thereof,.and'

the other a reactiongear at the other endo'f said shaft and surrounding the last mentioned end thereof, said reaction gears rotatably supporting said shaft and having hubs journaled in said standards whereby the winding mech-' anism as a whole is supported, and operative driving connections between said motor and said shaft.

11. In a hoist, a base structure comprising i I a base frame affording seats for the supporting standards of a winding mechanism,a second base frame detachably but rigidlysecured to the first, a motor mounted solely on said second frame, a pair of standards mounted solely on said first frame, winding mechanism carried by said standards comprising two relatively rotatable winding drums and driving means therefor including a shaft on which said drums are journaled and two sets of planetary gearing respectively operatively connecting said drums tosaid shaft, one including a reaction gear at one end of said shaft and surroundingsaid end thereof, and

the other areaction gear at the other end of said shaft and surrounding the lastmentioned end thereof, said reaction gearsrotatably sup,- porting said shaft and having hubs journ'aled in said standards whereby the winding mech anism as a whole is supported, operative driving connections between said motor and said shaft including intermeshing gears, and a casing surrounding said intermeshing gears and secured to the ad acent standard.

12. In a'hoist, a prime mover, a hollow drum comprising a relatively thin cylindrical rope winding portion, a shaft disposed withinlsaid drum coaxially therewith, said shaft being rotatable relative to said drum and driven by said prime mover, a stub shaft supported by said drum closely adjacent said rope winding portion, said stub shaft extendv ing-through said drum with one end thereofflush with an end of said drum, a pinion carried by the other end of said stub shaft outside thecorresponding end of said drum, '9.

I gear driven by said first mentioned shaft and meshing with said pinion, and a reaction gear meslnn wlth said P1111011, sald reaction gear being 0 larger diameter than said rope winding portion. I

In testimony whereof I affix my 'si nature.

ROBERT C. OSG OD.

CERTIFICATE OF CORRECTION. Patent No, 1,740,707. Granted December 24, 1929, to

ROBERT c. oscoon.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 3, line 72, claim- 6, strike out the comma, and line 74, after the word "pinions insert the word "one"; same page, line 83, claim 7, strike out the article "the", and line 97, claim 8, for "supported read "supporting"; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 13th day of May, A. D. 1930.

v a M. J. Moore, (Seal) Acting Commissioner of Patents.

CERTIFICATE or CORRECTION.

Patent No. 1,740,707. v Granted December 24, 1929, to

ROBERT c. ossooo.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 3, line 72, claim 6, strike out the comma, and line 74, after the word "pinions" insert the word "one"; same page, line 83, claim 7, strike out the article "the", and line 97, claim 8, for "supported" read "supporting"; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 13th day of May, A. D. 1930.

M. J. Moore,

(Seal) Acting Commissioner of Patents.

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