US1992543A - Rope thrust shovel - Google Patents

Description

1935- A. c. RASMUSSEN El AL 1,992,543

ROPE THRUST SHOVEL Filed Feb. 9, 1953 fiLV/N C. PHSMUSSEN. Pfir .5. BORN/9RD. FRED 8. RH).

wa m/I30 Patented Feb. 26, 1935 Y I UNITED 'sTrEsrATE T owl-cs ROPE THRUST SHOVEL Alvin C'. Rasmussen, Ray BrDorward, and Fred B. Ray, Indianapolis, Ind, assignors to Insley Manufacturing Company, Marion, Ind., a corporation a 7 Application February 9, 1933, Serial No. 656,0 10

13 Claims. (01. 21 4 135 As applied to power excavators, such,v for in-, 'end of the boom, through a p av Stance, as power shovels, the present invention ed Connected W the pp and provides novelinstrumentalities for efiecting and ce back ve a lu ab e e ve to e h pcontrolling the shifting or thrusting action of per shaft-drum. The hoisting ca l h p the dipper stick, V 1 ports the weight of the dipper and the resulting 5 It has been already proposedto provide adiptension in the Cable is d to Oppose the per thrusting devicejn which agingle b1 sion of the first. mentioned cable. Therefore, sociated with the power unitmay be employed the hoist cable performs'its functions of raising for effecting a shifting ofthe dipper stick inded ow rin t e d pp r and swin in th d pp pendently of the hoisting action of the hoist Stick' about the pp Shaft- Additionally, l0 gean. this previous proposal including the proh tension in the hoist Cable pp vision of dipper thru ti d i th t m be the tension inthe first mentioned cable, so that, operated and controlledfrom the hoisting and p a io o t a a y d for P y dragline drums, such as are ordinarily provided out'the lattervcable, the dipper handle iS forced 151111 certaintypes of power excavators, in a direction opposite to that .in which it 15 In t prior construction t means for efis moved when the'latterly-mentiohed cable is fecting and controlling the shifting. or thrusting. drawn in. The dipperstick is therefore always action of t {flipper hanohe embraces unique under the control of the auxiliary drum, and the cable connections between the dipper handle or dipper stick may-be forced'in either direction stick and t main power t, These, h Without requiring rotation of the hoisting drum. 20 tions are such that by drawing in on one line-of h d pp may be ais d or l w d at will y the cable, the dipper stick is shifted in one dithe hoist drum in the usual manner. rection, means beingprovided for opposing this The present invention provides an improveaction of this line of cable, to shift the dipper ment over these aforementioned instrumen- 5- handle in another direction as the Operating.actalities, by providing mechanism which will tion may require; The arrangement is such that eliminate theme of the drum on t pp the dipper stick may be shifted in either direcshaft. This drum, as employed in the prior contion, either during the hoistingor lowering of the struction referred to, is cumbersome, and difdipper. This shifting or thrusting of the dipper ficulty is sometimes encountered due to the rope handle is effected through the shipper shaft getting .out' of place and becoming entangled. 30 which is provided with a drum .fixed thereto; Furthermore, the use of a large rope on a small This drum on theshipper shaft is connected with. drum results in rapid deterioration of the rope. an auxiliary drum by. means of a .cable, one end In the present construction there is substituted of which is wrapped about'and anchored upon for the drum on the shipper shaft of the above 351 the auxiliary drum and theother end is wrapped construction, a chain for actuating the shipper about and anchored upon the'drumonthe shipshaft, this chain being actuated in 'turn by two per shaft; so that when the cable is drawn'in byl ne Causing pp action; e e es are action of the auxiliary drum, the shipper shaft interconnected with a cable clamp mounted on and shipper shaft drum are rotated so that the the chain and constitute a hoist'line and a re- 40 dipper stick is thrust. in one direction,say for tracting line. The chain'is mounted over a pair example, an inward thrust on the dipper stick of sprockets, one of which is mounted on the when the cable is drawn in. r shipper shaft, and the other is anchored onthe,

Instrumentalities are provided. whereby this boom adjacent the foot thereof. 1 1 action of the cable is opposed in order that,lwhen The hoist line extends from the hoist or digthe cable is payed out, the dipper stick is shifted ging drum of the machine out to the boom point, 45 in the other direction. .For this purpose there around a sheave located at the boom point, down is provided a dipper hoisting cable, the tension to the bale block on the dipper, around the sheave in which is utilized for the purpose of opposing on this bale block, thence back to the boom point the aforesaid'action. This hoisting cable is conand around a second sheave, thence back to a nected with the hoisting drum at one endfthe cable clamp mounted on'the chain. '1 50 otherend being secured to and wrapped around The retracting line starts at'the second hoist the drum on the shipper shaft, and forms in drum, passes over guide sheaves on the turntable effect a continuation of the first mentioned cable. of the'machine, thence to the cable clamp on the The hoisting cable extends from the hoisting chain; Tension on the hoist-cable, together 'with drum over a sheave mounted adjacent the outer a release of the retracting cable, pulls the chain toward the boom point. The opposite action is accomplished by pulling in on the retracting line, causing the cable clamp connection to move in the opposite direction.

The invention will be more readily understood by reference to the accompanying drawing, in which- Figure lrepresents a side view of a boom with a dipper mounted thereon, which dipper is adapted to be crowded in and out by the improved instrumentalities of this invention.

Figure 2 is a sectional view through the dipper stick and mountings, and illustrates the sprocket mounted on the shipper shaft over which the crowding chain is passed' r Figure 3 is a fragmentary side elevation of a portion of the crowding chain embracing the cable clamp, and illustrating "the general construction of this clamp. i

Figure 4 is a detail showing the usual ing drum and cable arrangement.

. Referring'moreparticularly to the drawing, the boom isdesignated generally at A, the dipper windbeing indicated at B and the dipperistick at C.v

It may be mentioned inthis connection that the dipper stick is made up of a pair of pipe-like members, one :on eachside of thersolid .boom.

These individual. members are indicated generally at 1 and .2 and are. provided with teeth 3 adapted to engage with the pinions 4 mounted on the shipper shaft 5. On this shipper shaft is mounted a sprocketfi. Over this sprocket 6 passes the chain 7, the chain being also passed over a sprocket 8 anchored through the bracket 9 to the boom A adjacent the foot thereof. On the chain is mounted acable clamp 10.. This cable clamp is a double connection providing for the connection of the hoist .and retracting lines. The hoist line is indicated-atll and extends from a hoisting drum M of. the machine, thence over guide surfaces 12 and 120 out to the end of the boom A. aroundtheiguide sheave .13 on the end of the boom, around the sheave 14 mounted on the bale block of the dipper B, back to the boom point around a second sheave 15 thereon and then. has its end secured tooneof the cable connections 16 of the-cable clamp 10.

v The retracting line 1'7 starts at the secondhoist drum on the machine N, passes over guide sheaves 18 and 19 at the turntable center of themachine, and thence to the other cable; connection 20 on the cable clamp 10.,

It will be seen from this arrangement of the cable that the weight of the dipper is sustained.

by the hoist cable 11- and, it is therefore placed under a tension which acts in. opposition to the tension in the retracting cable 17.

Thisresults, therefore, upon release of the retracting line 17, in the chain 7 being pulled to- Ward the boom point, thereby effecting the racking out of the dipper stick. I The converse action takes place when the retracted line 17 is pulled inwardly. This operates the chain 7 in opposite direction so as to crowd in the dipper stick in a manner which will be obvious. When the hoisting cable is drawn in, the dipper is raised and the dipper stick swung about the shipper shaft in the usual manner. If it is desired to force the dipper more firmly against the bank or to the point of excavation, this is accomplished by releasing the retracting cable, allowing the cable 17 to pay out, which enables the shipper shaft to rotate under the influence of the tension of the cable 11, and the dipper stick is forced outwardly. V

If, however, it is desired to reduce the bite by withdrawing the dipper, the retracting cable 1'7 is drawn in, which effects a rotation of the shipper shaft against the influence of the cable 11 so as to shift the dipper handle inwardly, as has been previously explained.

It may be mentioned, incidentally, that the use of the two round dipper stick members, one on each side of the solid boom, substantially reduces the side rubbing of one stick or the other against the boom side, and results in a rigid positioning laterally of the attachment. The circular section of the dipper sticks also produces a uniform resistance to bending in all directions.

I-Iaving thus described our invention, what we claim as new and desire to secure by Letters Patent of the United States, is- 1.- In a machineof the character described, a boom, a dipper stick mounted on the boom, racking instrumentalities for the dipper stick, a chain mounted on the boom and interconnected with the dipper stick, a cable clamp mounted on the chain, and oppositely acting tension cables interconnected with the cable clamp and cable winding instrumentalities for operating the said chain selectively in opposite directions for racking the dipper stick relative to the boom.

2. In a machine of the character described, the combination of a boom, a dipper stick for the boom, instrumentalities .for racking the dipper stick relative to the boom and including a shipper shaft, a flexible chain mounted on the boom and connected to the shipper shaft for actuating the latter to effect crowding operation of the dipper stick, oppositely acting tension cablesv interconnected with the chain and cable winding instrumentalities. associated with each cable for operating the saidchain selectively in opposite directions for racking the dipper stick relative to the boom. 7

3. In a machine of the character described, the combination of a boom, a dipper stick mounted on-the boom, racking instrumentalities on the dipper stick including a shipper shaft, a sprocket on the shipper shaft, a second sprocket anchored to the boom, a chain interconnecting the sprockets, a cable clamp mounted on the chain, oppositely acting tension cables interconnected with the chain and cable winding instrumentalities associated with each cable for operating the said chain selectively in opposite directions for racking the dipper stick relatively to the boom.

4. In a. machine of the character described, a boom, adipper assembly mounted-on the boom including a dipper and dipper stick, racking instrumentalities for the dipper stick, a chain mounted on the boom and interconnected with thedipper stick, a hoist cable interconnecting the said chain and hoist devices on the machine and arranged to sustain the weight of the dipper,

and a retracting cable interconnecting the chain and other hoist devices on the machine, whereby pulling in movement on the retracting cable actuates the said chain to rack .in the dipper stick, and release of the retractingicable enables the tension of the hoisting cable to cause reverse movement of the chain to crowd out the dipper stick relative to the boom, the digging operations of the machine being thereby controlled by the tension on the cables.

5. In a machine of the character 'described, a boom, a dipper stick mounted on the boom, :racking 'instrumentalities for the dipper :stick, a chain mounted on the boom and interconnected with the dipper stick, a hoisting cable, a retracting cable interconnected with the chain for moving the said chain in opposite directions responsive to actuation of one of the said cables, thereby operating the chain selectively in opposite directions for racking the dipper stick relative to the boom.

6. In a power shovel, the combination of two independently rotatable drums, a boom, a dipper, a dipper handle carried by the boom, a chain mounted on the boom and associated with the dipper handle, a cable connected with one of said first named drums and with the chain, and a dipper hoisting cable connecting the other of said drums with the chain on the boom.

7. In a power shovel,.the combination of two independently rotatable drums, a boom, a dipper and dipper handle carried by the boom, a

sprocket mounted on the boom and associated with the dipper handle, a cable connected with one of said last named drums for rotating said sprocket in one direction, and a cable connected with the other of said drums for controlling the rotation of the sprocket and for rotating said sprocket in another direction.

8. In a power shovel, the combination of two independently rotatable drums, a boom, a dipper and dipper handle carried by said boom, a sprocket mounted on said boom adjacent the midpoint and associated with the dipper handle, a second sprocket mounted on said boom at a point spaced from said first sprocket, a chain connecting said sprockets, a cable connected with one of said first named drums and with the chain intermediate the sprockets for controlling the rotation of the sprockets, and. a second cableconnected with the other of the drums and with the dipper and attached to the chain for rotating the sprocket in another direction.

9. In a power shovel, the combination of a pair of drums, a boom, a dipper and dipper handle carried by said boom, a sprocket mounted on said boom and associated with said dipper handle, a chain associated with the sprocket for rotating the same, and a cable connected to one of said drums and to said chain for controlling the rotation of the sprocket, and a second cable connected to the other of said drums and to said chain for rotating said sprocket. p

10. In an excavator shovel, the combination of a boom, a dipper stick mounted on the boom for thrusting and racking-in movements, a dipper carried by said dipper stick, shipper mechanism for thrusting and racking-in said dipper stick and mounted on the boom and comprising a shipper shaft, hoisting cable means for raising and lowering the dipper, a flexible shipper shaft actuating part distinct from and operatively connected therewith, carried by the boom and movable longitudinally thereof for causing rackingin and thrusting operations of the dipper stick, means for moving said hoisting cable means in opposite directions, and attachment means between the hoisting cable means and said flexible part whereby as the hoisting cable means is operated for raising and lowering the dipper, the said flexible part is moved longitudinally of the boom and caused to actuate the shipper shaft.

11. In a power shovel, the combination of a boom, a dipper stick mounted on the boom, a dip-per carried by the dipper stick, a shipper shaft for operating the stick, a flexible actuating member for the shipper shaft, a'pair of oppositely acting tension cables distinct from and connected to said flexible actuating member, said construction being of such a nature that movement of the flexible actuating part in one direction by one of the cables is resisted and controlled by the other of thecables.

12. Ina machine of the character described, the combination of a boom, a dipper, a dipper stick mounted on the boom, a rack on the dipper stick, a gear meshing with the rack, a gear shaft, a sprocket mounted on said gear shaft, a chain for driving said sprocket, means for operating said chain comprising a pair of oppositely acting cables attached to said chain at spaced points, a pair of winding drums for operating said cables, said construction being of such a'nature that one of said cables is effective to operate said chain and sprocket for dipper stick movement whilst the other cable controls such movement.

13. In an excavator shovel, the combination with a boom, a dipper stick and dipper mounted on said boom, of a shipper mechanism unit mounted on said boom and operatively connected to the dipper stick, including a shipper shaft and a shaft actuating part connect-ed to the boom to move along the same and operable to cause racking in and thrusting operations of the dipper stick, cable means distinct from and connected to said shaft actuating part and arranged to raise and lower the dipper, and means for shifting said cable means in opposite directions to effect raising and lowering movements of the dipper and actuation of the shipper shaft actuating part along the boom whereby said racking in and thrusting operations are produced.

ALVIN CQRASMUSSEN. RAY B. DORWARD.

FRED B. RAY.

CERTEFIQATE 0F GQRREQTKML Eatent No. 1,992,543. February 26. 1935.

ALVIN C. RASMUSSEN, ET AL.

it is hereby eertiiied that the residence of the assignee in the above numbered patent was erroneously described and specified as "Marion, indiana" whereas said residence should have been described and specified as Indianapolis, Indiana, as shown by the records oi assignments in this ot'iice; and that thesaid Letters Patent shouid he read with this correction therein that the same may conform to the record oi the case in the Patent fifties.

Signed and sealed this 8th day of Getoher, A. D. 1935.

Leslie Frazer (Seal) Acting Commissioner of Patents.

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