US1543705A - Hoist - Google Patents

Description

June 3Q, W25,

HOIST Filed June 3 Sheets-Shed June 3 1925.

HOISI Filed June 24, 1'921 3 Sheets-Sheet 2 ifi WWI/

Jun@ @G9 925.'

N. P. FLGN HOIST 3 Sheets-Sheet 5 led June 24, 1921 Patented diene 3&1925.,

irai..

sit

NELS P. "ELODXQN, OF MABQUETTE, MICHGAN, ASSGNOR TO LAKE SHORE ENGNE WORKS, OF MARQUETTE, MICHIGAN, A COBLEORATION F MICHIGAN.

HOST.

Application led Junev 24, 1921. Serial No. lev.

0 aZZ wlw/n t lmuy concern.:

Be it known that l, Nelis PJFiioniN, a citizen of the United States. residing at ,lilarquette in the county of Marquette and State of l\Iicl1igan,-have invented certain new and useful Improvements in Hoists, of which the following is a specification.

This inventionrelates to a new and improved hoist, and more particularlyto a hoist of the type having` a 'plurality of independently operable drums. VvThile it is broadly` adapted for various uses, my iinprovcd hoist is especially' designed forainderground use in mines for movingl ore or coal by the so-called scraper or slusher method. ln this method of operation, the ore. instead ot' being loaded into ears and trammed to the desired point of delivery. is moved b v a scraper or slusher broadly similar to the ordinary road scraper used in surface work for haiulliirg.` dirt in grading and excavating. r

i 'lo meet the requirements for underground operation in mines, the hoist or other 4ifmichine used to dragthe serapeir should be velv powerful for its size and weight. It Ishould be as sin ticabl'e and so designed that the mechanism is entirely protected from entry of ore or dirt.

.ln order that the scraper may have sufticient `apacity to move areasonable amount of material upon each trip, itinust be made so largeand heavy that it is impractical to return it to the loading point by hand. ConsequentlyY two ropes are used, a hauling rope and a tail rope.- The tail rope pays out from one winding drum while the, hauling ropeis being wound upon another drum. When drawing the scraper/back to its loading position thelwinding is reversed.

ln the operation of such hoists b v means of electric power, it is highly desirable that the machine be so designed as to avoid `the necessity for reversing the direction of rotation of the electric motor.

lt is an object of the present invention to provide a hoistadapted for use in manipulating drags or Scrapers of the character described.

It is a lfurther object to provide a hoist which is light and strong, which is coniposed of but. fewr and simple parts, and

all and as light as is 4pracwhich is capable of standing up under heavy loads.

t is also an object to provide a hoist provided with a plurality of drumsl which are independently operable and whih may he freed from the power and permitted to pay out rope under braking control.

. It is an additional object to provide a device of this character which is operated by a single lever.

Other and further objectswillappear as the description proceeds. l

My invention broadly comprises a plurality of hoist drums carried by a single shaft,

the shaft being rotated in a constant direction, preferably by, means of an electric motor. The drums are freely rotatable upon the shaftand clutch means'a're provided to selectively connect either drum to the shaft so that it may be, rotated thereby. The clutch means for the two drums'are operated by a single lever, the clutches being operatively connected by a shaft preferably contained within the main hoist shaft, Brakes are further provid-ed in association with each drum, and in the preferred forni these brakes are operated by means of the clutch operating lever. v

-I have illustrated a preferred embodiment of my invention in the accompanying. drawings, in which- Figure 1 is a side view partly in section showing the hoist and its associated motor;

Figure 2 is a sectional plan View taken upon the center line of the main hoist shaft, showing the clutch operating mechanism;

Figure S is an end view ofthe hoist; and

Figure 4 is a fragmentary section showing the clutch operating mechanism.

As best shown in Figure 1, the -electric motor 5 is mounted upon the base 6, which is common to the entire hoist mechanism. The shaft 7 of the motor is provided with a pinion S which meshes with the pinion 9 carried by the hoist driving shaft v10. The shaft 10 is supported in the gland 12 and its outer end brings up against a thrust bear ing- 13. rlhis shaft -is provided with the worm 11 which meshes with the hoist-gear wheel 14 carried by the main hoist shaftl. The main shaft 15 is supported at either end in the supporting frames latera/l" thrust, due to the inter-action be- 39 and 46. The` tween the Worm gee?? il; :intl gear -Wheel lli,

Enpentiing friction elutohes 2li enel 25 usual @instruction ere so iooated. es to eoeet with. the surfaces sind 2l, respectively'.

i The 'clutch 2li is operated by the iinlis 26,

the outer ends these iinlrs being eonneet ed to shifter sleeve 2?. 20 iis adopted to nieve longitudinally upon the shaft 15 enti is connected through that sheft by the key 28 to the einteh shifter shaft 29.

".lf'his shaft 29 conteined within. the Sheila `1.5 enti 'slides freely therein. A pair of #elongated slots 3G is ionized in tliesheft to permit lon'git-nciinal movement of the yltey 28. yllhe eiuteh is opersteel hy the links 31 'sleeve 32. This sleeve 32 is also connected 3" to the clutch shifter shaft 29 hy' e. key 33 which passes through slots 3e in the shaft l5. The shifter sie'eve 32 receives the shifter yoke 35, e. bearing Wesher 3o hein# interposed between the .members 32 one. 35. 3f best shown in Figore Il, the 'trunnions 37 'of the yolre35 are received in the jaws 'of the operating forli 33. niilris fork 33 is `sirported bythe standard 39* no is nieveh e aboutv e. 'pivot fi() which is loe-ated in i@ e plane trensve-rseto that of the shalt l5. The furie 33 et one enti is provirieci with the soton-ting quadrent' l1 which has 1 heyelerl gee; meshing with those upon l \Qosimilorquedrent l2 carried upon the shaft 41?- 43. `To this quadrant lis seenrecl the op- "ereting lever v A 'Referring now to Figure provided extending below the main .shaft i5, the ends of the sliet being pvotally 59 supported vin the enel ielnes 33 end e6. This shaft is provided with the erin si? which is xeclly oonneetecl thereto, and this arm is eonneetecl. hy the linlr i8 to the erm 49 connett/ed to the operating lever 44.. 55;;f1`he shaft sis else. provided with the ear .5.0 ,to which pirotelly connected the brake l'flfii. This rod 51 passes thro-ugh the lbrie erm 53, enel nuts 5e upon the enti oi:

' the roel meint/ein the hre-lie spring 55 against 0 lille brake erm. The hre-ire erro 53 is oro- "-ided with e limite lining 56 which bears v1.1 on 'the hre'ke ieee oithek hoist drum 1.5i i, The brake 5'? is simiieriy eonneeteci to the sheft end beers upon the hielt-e drum l 22ste@ ies-i. i Y

enel thrust hearing 53.'

This sleeve -t-.lie gear sectors il end 42 is which ere connected to the shiter 3, e. shaft i5 is reeeyfoe ln 'the operation of my .apparatus the motor 5 is pnt in motion in such direction as to rotate the shaft l0 and the geel.' Wheel 3.1i iii the directions indicated by the eri-owe in Figure l. This power is transmitted from Ithe inotor shaft 7 to the driving shaft l() byy means of the pinions enel 9, a eertein einount of gear reduction taking place between pinion's. The gear Wheel lll is ro' tened hy the worm gear ll and. e quite considerable gear reduction is aii'orcleti hy this drive. Thus the totel gear reduction is suoli. that e. ,sin-ell, highepeed motor may he used the hoist drums nifty nevertheiess he driven et e. 'proper speeti.V

lil/with the operating lever Ziel in its neutral position both drums i8 and 19 are disconnectecl from the shaft l5. Further, the breites 53 end 57 heer lightly upon the drums enel prevent their free rotation. lli/'lien the lever le is moreel to `the right :is seen in Figure 3, the forli 33 hy ine-ans ot so rotated about its airis as to move'the shifter sleeve 32 to' the lett, as seen in Figure 2. This movement. of the shifter sleeve 32 is trans- Inittecl to the shifter sleeve 27 by means of the shifter shaft 29 and the keys 33 and 28, but the movement of sleeve 27 in this direction simply serves to Inove the links 23 in sueh direction es to maintain the elutoll 2li released. The movement oi` the shifter sleeve 32 serves to so operate the links 31 es to expend the clutch 25 and connect the hoist drum i9 to the shaft l5.

Simlilterieo-usly this movement of the lever 44r- 4is transmitted to the shaft 45 by means i of the erm 49, the link i8 and erm fil'. The rocking motion of the. lever 45 serves to eo move the lug as to push ont the brake roel 5l sind release the spring 55, which fits ageinst the breite erm rihe limiting eetion upon the hoist drum 19 is thus relievetl. rllhis same motion of the she'ft 45 serves also to increase the spring pressure upon the breite tion of the hoist drum 18 upon the sheit l5 suflieiently to prevent overrunning or bseiiiash.

A reverse movement of the lever @ill lOO --,ilo 5iv :incl thus resists the rotethrough its @entrai neutral position to the opposite enel of its movement serves to relesse the clutch 25,from the hoist drum 19 enel to apply the brake thereto, enti further to so, operate the eluteh 2iee to connect 'the hoist drum i3 to the shaft i5 and to release the hrekeon that hoist drum. In "the neutral position, es has heen stated, both hoist drums are disconnected from the shaft enel are lightly breited to prevent pla-y or backlash. t y

the particular utilization off my hoist, the tiring rope will have its end Gonne/otm one tiren: and its opposite end to the i oi" *.lhe roe@ will he eoneeeteil l hauled back to its loading `itself to the use of fcrlng slzes. 'l

to the other drum and will pass over a pulley iixedat the point of load and then .will have its other end attached to the rear of the drag. The operation of the drag is entirely controlled by a movement of the single lever 44. `lllov/eincnt in one direction the" scraper forward; moyement to neutral position halts it for discharge; and movement ofthe lever in the opposite direction causes the scraper to be point by the tail rope.-

lVhile the hoist has been. shown as'operated by the hand lei'ver, it is obvious that this lever may have, a rope or rod or other` means connected thereto so that remote control may be 'nadif desired.l The brakes effectively prevent backlash or overrunning of the rope and are automaticallyr operated by the operating lever, rllhe braking action' on the outgoing rope is not suiiic'iently heavy to materially add to the power required, but is simply suilicient `to put a slight tension on the 'idle rope so as to take up slack and keep the rope slightly taut. 2

The particular form of driving connection which I have shown is of particular value not onlyl in its compactness and its gear reduction but also 'because it readily adapts different motors of difhevspur gears 8 and 9 are all that need be changed to vary the gear ratio orto accommodatethe hoist to the use of motors of different siaes or motors having theisliafts at differentelevations above the base. The spur gears also',` prevent transmission of any longitudinal ,motion from the motor shaft to the shaft carrying the worm gear.

My hoist is exceedingly compact in design, simple 1n construction and is composed of but few and rufffved parts. The working bles v l parts are so placed as to minimize the dann ger of injury or derangement due to ore or other material'worlrinrv into the a aratus. 45

l claim l. In a hoist mechanism, a driving shaft, a hollow driven shaft, a pair of hoist drums upon said driven shaft' in spaced relation,

said drums being rotatable independentl 50 of each other and of the `shaft, a clutc shaft in said hollow driven shaft, clutches operating upon each of said drums, clutch operating sleeves for each of said Clutches fitted slidably upon the hollow shaft and 513 the shaft to the connected through slots in clutch shaft, a lever operatively connected to one of said clutch sleeves, brakes operating upon the drums,v and means connecting said brakes to said lever, whereby movement 6o of the lever in either direction from an intermediate position serves to release the brake and throw in the clutch on one of said drums.

2. ln a a hollow driven shaft, a pair of hoist drums upon said driven shaft in spacedrelation, said drums being rotatable independentl of each other and of the shaft, a clutch sha t in said hollow driven shaft, clutches operat- 7o ing upon each of said drums, clutch operating sleeves for each of said clutches fittedv slidably upon the hollow shaft and connected through slots in the shaft tothe clutch shaft, a lever operatively connected to one of Z5 said clutch sleevesbrakes operating upon the drums, and means conneotlngsaidbrakes to said lever, whereby movement of the lever in either direct-ion from an intermediate position serves to throw in the clutch on one of saidv drums, both brakes being partly applied when the lever is in said "ntermediate position.

Signed at Marquette, Michigan, this 17th day of .l une, 1921.

. NELS P. FLODIN.

hoist mechanism, a driving shaft, o5

release the brake and S0

Images