US1355763A - Dumping-wagon hoist - Google Patents

Description

G. W. LALLYL DUMPING WAGONVHOIST. APPLICATION FILED NOV. 20, 1915.

1,355,763. Patented Oct. 12, 1920.

UNITED STATESNPTATENT OFFICE.

GEORGE w. LALLY, or EVERETT, isssAonUsETTs, Ass-IGNoE To THE LALLY' I COMMERCIAL BODY COMPANY, or EVERETT, MASSACHUSETTS, A CORPO- V RATION 0E MASSACHUSETTS.

DUMPING-WAGON HOIST.

Specification of Letters Patent.

Patented Oct. 12, 1920.:

' Application file d fioveinber 20, 1915. Serial No. 62,502.

To allwhom it mayconc'em:

Be it 'known that I, GEORGE W. LALILY, a citizen of the United States, and resident of Everett, county of Middlesex, and'State of Massachusetts, have invented anlmprovement in Dum ing-l/Vagon Hoists, of'which the following descriptloi i, in connection with the accompanying drawings, is a speci-' fication, like numerals on the drawings representing like parts.

My present invention is an improved; hoist for dumping wagon bodies, particularly iiitended for use in automobile trucksfwi'th a carrying capacity of several'tons. The object of my invention is to enable a simple and powerful hoist capableof handling very heavy loads to be utilized in the modern type of automobiletruok, wherein the ex tra lifting power requisite in the first tilt ing action ofthe body may be secured and the further tilting of the dumping bodyis also effected through the same lever. In order to render a dumping vehicle body of the type herein illustrated of strong and simple construction, it is necessary to arrange the entire hoisting mechanism bee tween the wagon frame'and the bottom or sill of the movable body, thus insuring a low center of gravity and compact construction. However, considerable difiiculty has been found in devising suitable andsufiicr ently powerful hoisting clevices'whioh'can be folded within the short space allowed between the vehicle frame and wagon body sills.

tively short lever or arm, to conserve the hoisting power while initiating the lifting or tilting of the body, although after the 1 As the speed with which a dumping body can be hoisted and its. load discharged are of great importance,while the power available is only that manually'applied bythe" driver or operator to a hand crank, the dif'-? ficultie's' of the hoisting problems in this i type of heavy load-carrying vehicles will be appreciated. These diiiicultiesare' increased in themodernautomobile truck wherein a load of many tons is ordinarily to be baa,

In my present invention I utilized a type of bent arm hoist shown in-the dled.

I In using levers for this hoisting mechanism it is necessary to'em'ploy' a rela-' copendingapp'lication of Robert W. Rose,

Serial No. 46,657, filed August 21, 1915, and p also employ, preferably a wedge type of tion as applied to an automobile truck,

Figure 1 a Side view illustrating the initial position of the hoist andthe final 7 position, asshown in dotted lines;

'Fig. 2 is a plan View with theQdumpingbody removed. I

I have-"herein illustrated the hoist inconnection witha turntable mechanism of novel formand suitable to carry'a hea'vyload of f approximately ten tons of coal, capable of discharging such loadat the rear oreither side of the truck, and with the center ofgravity of the dumping body both with its load and when empty, carefully centered at a low point over the rear wheels of the truck and turntable, when the body is in:

raisedposition; M U M An automobile chass s is shown in con:

ventional form, compfrisingthe side frames" 1, engine'2 and seat '8 at the forward-end of the truck, with the dumpingbody and hoisting mechanism arranged to i be carried principally by the rear wheels, and 'when raised to inclined position to be centered, over the rear axlejt, A dunipingbody5 is mounted upon sills 6 at each sidefof the vehicle, and the hoist frame includes} a pair of supporting members'l, said frame being;

pivoted, at 8 upon each ,side to the sills '6 0f the dumpingbody. The frame7'also is mounted uponthe upperlmeinber 9 of the circular turntable supported by a pluralityl of short braces, 10, the corresponding lower. turntable bearing 1 1 being fixeddirectly' upon the. support 12, carried by the vehicle side frames 1. This turntable construction is centered over the rear drivingwheel airle- 1," and the entire body, frame 7 and hoist ng mechanism to be described is adapted to 1 center 19 of the turntable.

swing and turn upon said turntable so as to discharge the load at any point desired within the range of swinging movement from one side to theother of the truck.

At the forward end of the side frame 7 is a cross bar 13, firmly uniting the sides of frame 7 and carryingthe forward ends 14 of the side tracks 15, said tracks being preferably of angle iron and extending horizontally from the cross bar 13 to the point 16 and thence at an angle to the top of the frame 7 at17, on each side. At the forward end of the frame 12 are rollers 18 supported on which the cross bar 13 'of'the frame rests androlls. These rollers bear the weight of the dumping body 5 at the forward end when said body is in lowered position, supporting the front end of the body, its load and the forward part ofthe frame and hoisting mechanism. The rollbow of the bent arm levers "is a 'shaft 25 extending through each arm and. carrying rollers 26 on its opposite ends adapted to bear directly against the lower portion of the sills 6 on the body 5. A similar shaft. 27 unites the forward ends of the arms '23 and carries rollers 28 on its opposite enhs which bear upon the track 14. Each of the rollers may have small flanges as indicated at 29; The ends of the arms 24-;are each pivotally united to the body, preferably with links 30 by a shaft j 31 which links have their opposite ends pivoted .ona rod 32,,

which rod is fixed to the sills of the dump,

. ing 'body5, passingthrough a lower bar of the arms 23. These wedges 36 mayhave 33 bolted to the sill 6 and acting as a'guard.

or flange to retain thG'IOllGI'S 26 and ting snuglywithin the side frame 7 when the body is in lowered position. Cross braces 34 and135 are bolted to the bent hoisting levers substantially as illustrated in Fig. 2. I prefer to'utilize a wedge member 36 at each side of the dumping body which wedge will receive the initial thrust of the arms .23 .of the hoisting levers, the

I rollers 26 on the shaft 25 at the elbow of the *levers bearing first upon the wedge 36 dur-v ing the initiation of the tilting or lifting movement and thus taking the direct thrust a contour appropriate for the power supplied and load to be lifted to cooperate with the angle of the arms 23.

. ends secured to the rod 27 at the forward end of the levers. The levers are thus moved by winding up the chains 38 through the retation of the shaft 37. gears 39, 40 and 41 is provided,the shaft of the gear 41 being equipped with a hand crank 42, as is customary. Admin 43 secured to the frame 7 at one end and to the sills of the body 5 at its other end is of pro er length to limit'the hoisting action until the tilting of thebody 5 will bring said body and its load in position substantially with its center of gravity over the center 19 of the turntable. 7 V r The operation of the hoist will be readily V understood. Manipulation of the hand crank 42 and the train of gears rotates'the shaft A suitable train of 37 winding up the chains 38. These chains 7 with the rolls 26 bearing upon the wedges 36. The engagement of the links 30 insures the continuance of the thrustingaction of the side levers 23 directly upon the wedges until the tilting body 5 is inclined considerably and the heaviest work of the hoisting action is completed. The continued winding up of the chains 38 and movement 7 of the bent arm levers 23 and 24 brings the end portions of the arms and the sides of the links 30 into engagement direetlyon. the bottom of the sills 6at 45 where the le vers are held by the links 30 andthe completion of the tilting action is carried on by the movement of the rolls28 on the in-.

clined portion of the tracks until they have reached the limit of movement at the point 17 when the chains 43 will act asfla-stopJ With the tiltingbody in this position, centered'over the turntable, it may beswung at either side to discharge the load at an angle, the frame support and hoisting mecha v nism swinging with the body 5 around the turntable and across the rolls '18, sufficient clearancebeing provided by both the forward portion of the frame and the rearward inclination of the dumping body 5 topermit of lateral swinging entirely around the turntable from one side position to.the other. When the body and frame have been swungto desired position, the load is then;

discharged, and the empty wagon body. and:

frame; will still be balanced overthe turntable, being easily swung backwardly into normal position in alinement with th t U I mobile truck, the frame resting upon the "rollers 18. In this position the body is then lowered andfth'e normal center of gravity of the lowered tilting body will hold itin downward position without catches, looks, or the like, and in position to receive another load.

adapted to receive the initial lifting thrust of the other arm of the levers and means to move the pair of levers in unison whereby the first tilting movement is effected through the lifting action of one of said lever arms and the final portion of the tilting move ment is produced by the thrust of both arms of the levers, each lever having an anti-friction bearing at the right angled elbow traveling on the wedge.

2. In a hoisting apparatus of the kind described, a pair of bent arm levers adapted to effect the hoisting action, each lever comprising two arms extending substantially at right angles to each other, a linkconnection for one arm, to the article to be raised, wedges adjacent said link connection and means to secure the lifting action of one of the lever arms on the wedges during the preliminary hoisting actuation of said levers, the bearing of the levers on their respective wedges being at the right angled elbow of each lever.

3. Hoisting apparatus of the kind described, comprising a pair of bent arm levers adapted to effect thehoisting action,

each lever consisting in two portionsrigidlyysecured together extending substantially at right angles to each other, a link connection for one of said portions to the arjticle to be raised, an anti-friction bearing for the lower end of each lever, a rod connecting said pair of levers at the right angle elbow portion carrying a roller bearing on the'body, flexible chains attached to the free ends of said levers, and leading un-' der said link connecting means and thence upwardly to a shaft on'which said chains are wound, said shaft being journaled above the normal lowered position of said link and lever connection, whereby the winding of such chains will exert a liftingtension at the elbow of each lever and simultaneously with the thrusting strain on the outer ends .of said levers.

4., In a hoisting apparatus of the kind de scribed, a pair of bent arm levers adapted to effect the hoisting action, each levercomprising two arms extendlng substantially at right angles to each other and'normally bearing on the apparatus to be hoisted at the angle joining said two levers, a link con motion for one arm, to the article to be l raised, wedges adjacent said link connection and means to secure the lifting action of one of the lever arms on the wedges during the preliminary hoisting actuation of said levers, together with means for com pleting the hoisting action through the "movement of both arms of each lever in approximately a vertical hoisting position.

5. A vehicle hoist of the kind described, comprising a vehicle chassis, a turntable carried by said chassis, a frame mounted on said turntable, a dumping wagon body pivotally mounted on said frame, hoisting mechanism between the frame and dumping body, including a pair of bent arm levers, each arm extending substantially at right anglesto'its adjacent arm, rolls on the'forward ends of said levers, a track for each lever, carried on the frame and including-a straight portion and an inclined portion, pivotal link connections onthe ends of the lever arms opposite to said roll carrying arms, roller bearings on the elbows of each bent arm lever adapted to impart preliminary hoisting to said dumping body during the first movement of the hoisting levers on the tracks, means for the link ends of said bent arm levers to take up the fur ther hoisting action and complete the same, together with means to move the levers in unison, to produce both the preliminary thrusting from the elbow bearings ofv the bent arm levers and the completion of the hoisting as a continuous actuation.

6. Hoisting apparatus of the kind de-. scribed, comprising a vehicle, a dumping body pivoted thereon, hoisting mechanism to raise said body angularly with relation to the vehicle, said mechanism including a pair of movable levers, one at each side of the said arms, anti-friction means bearing be- ,1

tween the other end of the arms and the vehicle, an inclined path on the vehicle for the hoisting levers to follow, a shaft mounted above the normal lowered position of said pivotal 'connectionbetween said 1 levers and links, a pair of chains arranged to be wound upon a shaft to actuate the levers andso positioned and arranged as to be completely wound upon the shaft when the hoisting levers have completed their 1 lifting. movement with the said pivotal links bearing against the bottom of the vehicle body. a

In testimony whereof I have signed my name to this specification in the presence of two subscribin witnesses.

EORGE. W. LALLY. Witnesses: V

JAMES R. HODDER, HAROLD J. C ARK;

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