US1289166A

US1289166A - Excavating mechanism.

Info

Publication number: US1289166A
Application number: US21744218A
Authority: US
Inventors: Hollis H Harris
Original assignee: THEW AUTOMATIC SHOVEL Co
Current assignee: THEW AUTOMATIC SHOVEL Co
Priority date: 1918-02-15
Filing date: 1918-02-15
Publication date: 1918-12-31
Anticipated expiration: 1935-12-31

Description

H. H. HARRIS.

E'XCAVAHNG'MECHANISM.

APPLICATION FILED FEB. :5. 19m.

Patented Dec. 31, 1918.

" 2 SHEETS-SHEET l.

frag,

.- Z'ZUEHZUh M4; 0% J H. H. HARRIS I EXCAVATING- MECHANISM, APPucAQou FILED FEB. l5. ms.

Pat ented Dec. 31, 1918.

2 SHEETS-SHEET 2.

,- Jzuemap:

Mam/an Xfa/J mwma i J i nf S PA HOLLIS H. HARRIS, or LORAIN, OHIO, ASSIGNOR 'ro THE anew AUTOMATIC srr'ovEL COMPANY, or 1.03am, 01:10, aconrona'rron or omo.-

EXCAVATING- MECHANISM. i

Specification of Lettersiatbnt. f, P te t 99, 31, 191

Application filed February 15, 1918. Serial N6. 217,442.

To all whom it may concern: I

Be it known that I, HOLLIS H. HARRIS, a

citizen of the United States, residing at Lorain, in the county f Lorain and State of Ohio, have invented a certain new and useful Improvement in Excavating Mechanism, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to power shovels or other excavating mechanism adapted to be propelled and provided with a supporting truck with a superstructure adapted to swing thereon. The object of the invention is to provide efiicient means for steering the machine. 'This is accomplished by swiveling one of the axles at its center, and swinging the axle either automatically, consequent upon the swinging of the superstructure, or by hand independently of such swinging. The invention is hereinafter more fully described and the advantages of the mechanism illustrated explained, and the essential I superstructure; Fig. 4 is a side elevation and Fig. 5 a plan of that portion of the automatic steering mechanism which is adapted t be connected with the outer end of the swiveled axle. The remaining figures illustrate the hand steering mechanism, Fig. 6 being a detached plan thereof, Fig. 7 a detail illustrating the connection of the link with the bell-crank, Fig. 8 a longitudinal section through the clevis Connected with the bell crank, and Fig; 9.an enlarged longitudinal cross section through the frame of the truck.

As shown in Figs. 1, 2 and 3, 10 designates the body of a truck, 11 wheels journaled on stationary axles carried by the truck, 12 an axle swiveled at its center (16) t0 the truck and 13 wheels on the swiveled axle. ignates a superstructure having a platform swiveled at 21 to the truck and adapted to carry suitable excavating mechanism, as a boom, cables, etc. .hese latter parts are not shown, eigcept that Fig.1 illustrates at 23 20 desthe pivotal anchorage for the lower end of the boom; i,-

The truckis" shown as provided with a stationary horizontal gear 15v concentric. of the axis 21. With this gear meshes a pinion 25 carried on .a vertical shaft depending from the platform. and, adapted to be rotated by suitable mechanism (not shown) which may be carried bythe, platform. The rotation of the. pinion 25 will swing the entire superstructure aboutthe axis 21 one wayor the others. accordingtgthe, direction of rotation. re

To enable the swinging of the superstructure to swing the swiveled axle 12 to steerthe machine, I provide a link mechanism connecting the superstructure platform with the. end'of the. swiveled axle. This will now be described.

The swiveled axle extends beyond the outer face of one of the wheels 13. Journaled on it at this point is a block 30, shown as retained in place by a washer 31 held by a cap-screw 32 screwing into. the end of the axle. A link 40 is pivoted to this block on a vertical axis. As shown most clearly in Figs. 1 and 4, this link is bifurcated near its end and has its two arms 41 and 42 extending respectively above and below the block 30. A suitable pin, 45 extends through the arms 41 and 42 and the intermediate block30, whereby the link is pivotally connected to the axle on a vertical pivot. This together with ,the horizontal journaling of the block-30 or'r the swiveled axle makes a "universal joint between the link and axle.

At its ther end the link 40 universally jointed to the platform. To effect this, I provide a bracket 50 secured to one of the sills 27 of the platform. This bracket has a vertical ear orweb portion 51 in which is swiveled on a horizontalv axis a clevis 52 which is pivoted on a vertical axis to the link 40.. The clevis is a ,U-shaped member extending above and below the link 40 and pi\ oted to it by a vertical pin 54 extending through the arms of the clevis and-an eye v4 With such'aijconstruction-asidesci'ibed,the.

axle Sh f he wheels 113* relative to" th is nearer the'longitu'dinal center of the truck than the outer side of the wheel 13. A0-

from its lower-endapproximately equalto the radiuspffthe' wheel, the point of -benddicat'ed at 48. This enables the ing being in forked portion of the linkto normally lie. parallel withthe outer *face of the wheel -and comparatively close to it while the uppe'r'end is closer to the truck frame, as

shown clearly in Fig. 2.-

the axis The link is f such length and its driv ing' end so located "that the link swings away from the wheel 13, for either direction the platform, so" that there of swinging of I can. bend binding on the wheel. i This 1s illustrated in Fig. 3, wherethe normal position of the steeredjwheel, the link its driving 'pivotfis shown by thebroken -'l1nes v 13, 40 and 54. I The platform swings about 21 and the swijveledaxle' about the axis 16. Nowfif the -platform'be turned .t'oward-the slde where. the link is located I the pivot pin 54- swings'in' thearcA lioncentric ofthe axis 21- into. the position shown at 54 in full linesin Fig.3. This 'lower end of it to swing in necessarily displaces the link '40- longitudinally, causingthe "universally con'nect'ed center 16, In suchswinging the outward travel 'ofthe pivot 5-]: is'more than the outward travel ofthe.- .corner of the wheel13, with the 'result that the portion l8 of the link adjacent .to the wheel corner'swings slightly away from the wheel. The slight V divergence, shown in Fig. 3, is increased I so as the. platform swings farther in that direction.

' Now, if the platform should swing-in the? opposite direction from the-normal position shown in '2,'the' corner of the wheel '13- swings inwardly faster .tlian the head end of the link 40 is swung along the arc so: that the' cornenof the wheel travels rla tively away from the link 40. This; is.illustrated by broken lines in Fig. 3 where the ivot pin 5* is shown positioned at 5%", the wheel 13in the position 13", and the link 40 in the position 40".v It will accordingly be 'seen'that whichever way the superstructure swings the link 40 clears the wheel 13.

In the ordinary use of the shovel it IS desired tohave the truck stand stationary or be propelled in a straight line and the superstructure swingfreely on its axis. This is I allowed by disconnecting the link 40 from the swiveled axle. The disconnection is easily effected by withdrawing the pin 45,

cording'ly, the lin'k l0 is'bent at'a. distance an' are about the" I EIGBHI g the bifurcated end of the from the block 30.

To co'nvenientlysupport the link 40 when it is disconnected from the swiveled axle, I provide a'hook 6O securedato the superstructure frame andfacing outwardly, as shown in Figs. land 2, the'support for the hook'beingfomitfed' in Fig.2. When the link is disconnected it may he simply raised. anch'swung ihward :and deposited in the loop of'the hook 60; The pivot pin 45 is ordinarilyreplaced in the forks41 and 42 as soon as removed from the blockand the link then swung up and supported by the hook, where it may be carried indefinitely out of the way.

To enable the swiveled axle to be turned wheneverdesired by hand independently of the superstructure, I provide a very simple. and effective mechanism, which may be connected whenever desired, and which is illustr atedin ,Figs, 1, 2 and 6 to 9 inclusive.

. This .incchanisln consists of 'ascrew 70, threaded In a nut 71 swiveled to the truck frame; a clevis'72 in which the inner end .of' the 'shaft of the screw is rotatably' mounted; a'bell-crank 73 connected to the clevis and pivoted to the frame at 74 'and having an-arm 75, and a movable link 76 adapted toconnect the arm-7 5 with an eye 77 .secured to the swiveled axle 12.

With such a structure as just described the rotation of the screw 70 (as for instance by a' hand crank '80 removably connected to the squared ,end of the screw), will result inthe swinging of the crank-bell one way or the other and the pulling or pushing on the link 76, to swing the swiveled axle accordingly;

The attachment of the nut 71 and bell-' crank 73 to the truck frame will, of course, vary with different forms of frame. I have shown a frame inwhich there are longi tudinal I-beams 17 and transverse I-bearns,

of which two are shown at 18 and 19. It is convenient'to swivel the nut 71 to zone of the lower flanges of the I-be'am 18 as indi cated at 82 -in Figs. 1 and .9. Similarly the pivot of the. bell-crank may be connected to one of the lower flanges of the transverse I- beams '19. Thus Fig. 9 shows the stud 74, forming'the journal for the bell-crank, extending through a lower flange of the I- bea'in 19.

To prevent the hand steering device from interfering with-the automatic steering, I make the link 76 readily 'disconnectible. This link is preferably. a horizontal bar having down-turned ends 78 and 79, Fig. 1. The down-turned end 7 8 extends through the eye-in the outer end of the bell-crank arm 75. To enable the link 76 to be conveniently hooked into the arm, I form a groove 85 extending across the upper face of the arm, and I locate the hole 86, which the point 79 is intended to occupy, at the mid point at 1.30

Leeeaee this groove. Now, in putting," the link in place, the end 78 is readily hooked into the eye 77 and the end 79 brought approximately into its engaging position. if, now,

the bell crank is approximately in position for entrance of the hook, the point 79 may be readily placed in the groove 85 by feeling. Then the bell crank is swung one direction or the other to bring the hole 86 into registration with the point 79 and the link will drop intoplace. This enabled the link to be placed without visual observation, which is considerably advantageous, owing to the position of the mechanism.

Having thus described my invention, what I claim is:

1. The combination of a truck having a swiveled axle, a superstructure swiveled on the truck, and a link, one end of which is pivotally mounted on the superstructure approximately at the side of the swivel and the other end pivotally mounted on the swiveled axle.

2. The combination of a truck having a swiveled axle, a platform swiveled to the truck, a link connected at one end by a universal joint to a part rigid with the plat form and at the other end by a. universal joint with the swiveled axle. J

3. The combination of a truck having a swiveled axle, a superstructure swiveled to the truck, a link connected at one end to the outer end of the swiveled axle beyond the wheel, and means pivotally connecting the other end of the link tothe superstructurc.

4. The combination or" a truck having a swivelcd axle with wheels thereon, a platform swiveled to the truck on a vertical axis,- a bracket at one side of the platform, a link pivoted at one end to the bracket and extending on the outer side of the wheel and pivotally connected with the axle.

The combination of a truck having a swivcled axle with wheels on it, a platform swiveled to the truck on a vertical axis, a. bracket carried by the platform, a clevis swiveled to the bracket, a link pivoted to the clevis, a block mounted on the axle outside &

of the wheel, and a pivotal connection between said block and the adjacent end of the link.

6. The combination of a truck having a swiveled axle carrying wheels. a platform swiveled to the truck, a link connected to the platform, said link being provided with a fork on the outer side of one of the wheels mentioned, a block mounted on the swiveled axle beyond the wheel, said fork extending onto the .upper and. lower faces of the block, and a removable pin pivotally connecting the fork to the block.

7. The combination of a truck having a swiveled axle carrying wheels, a platform mounted on the truck to turn on a vertical axis, a link universally connected at one end with the platform, disconnectible means connecting the other end of the link with the swiveled axle, and means carried by the platform for supporting thelink when discon nected.

8. The combination of a truck havinga swiveled axle carrying wheels, 2. platform mounted on the truck to turn'on a vertical axis, a link movably connected at one end with the platform. disconnectible means connecting the other end oi the link with the swiveled axle, and a hook carried by the platform and adapted to receive and support the link adjacent to its free end when the link is swung up into approximate parallelism with the platform.

9. The combination of a truck having a swivelcd axle carrying wheels, a platform mounted on the truck to turn on a vertical axis, a link movably connected at one end with the platform and bifurcated at the other, a block on the swiveled axle adapted to be engaged by such fork, a removable pin connecting the fork with the block, and a hook carried by the platform and adapted to receive and support'the link adjacent to its 1 forked end when the link is swung up into approximate parallelism with the platfornn\ In testimony whereof, I hereunto aiiix my signature.

HOLLIS n. interns: