US2045387A - Elevating grader - Google Patents

Description

J. B. GREEN ET AL.-

ELEVATING GRADER Original Filed April 6, 1932 5 Sheets-Sheet 1 iiiliiiiiAAlA/fi n I a a o H mm Q \k i Q J. B. GREEN E1 AL 2,0453%? ELEVATING GRADER Original Filed April 6, 1952 5 Sheets-Sheet 2 June 23, 1936.

June 23, 1936. 1 GREEN ET AL 2,045,387

ELEVATING GRADER Original Filed April 6, 1952 5 Sheets-Sheet 5 r M n June 23, 1936. J. B. GREEN ET AL 2,045,387

ELEVATING GRADER Original Filed April 6, 1932 5 Shets-Sheet 5 i fijj fl Patented June 23, 1936 :EIZEVATIN G GRADER JamesB; Green andIJohn M. Rathmell, Aurora, 111., assignors, by inesne assignments, to West- *ern=Austin"Cornpany, Aurora, 111., a; corpora-- tion of 1 Illinois Original application April '6, 1932, Serial No.

603,460. Patent No. 1,981,170.

Divided and this application March. 10, 1933, Serial No...

17 Claims.

The' present invention; 'relates' :to elevating; graders which excavate =orrzplovw up the. soil and elevates-it for dumping: into wagons ormtrucks travelingalongs'ide :or inproximity to the grading 'machine.

gradinga roadway. prep'aratoryatoupaying azroadi or street-and are.-. used inzother:likerexcavating.

These machines are eidsensivelyusedin operations. The two. fundamental elementsof suchza' machine arethesgradihg: ,plow. which breaks a and turns =upxthe1seil, and the. elevator which'recei-ves thissoil fromthe plow and; elevates it up to a delivery pointwhere thesoil isdischarged into a wagon or truck traveling: adj acent to the grader. Y

The present application:-is=divisional-of our Patent i No. 1,981,170,. and :is concerne-diprimarily with the improved power actuated" adjusting. means'which was disclosedin that application :for.

adjusting the grading plow 'and f or adjusting the elevator.

One of the objects of the invention is :to '-pro-- vide improved power actuated means :for: vertically adjusting the =position of 'tl'iegrading plow. Another-object of the invention is to provide improved poweractuated means :for vertically andjusting the discharging height/ 0f the outer end In thecase df the ordi nary manof the elevator; uallyactuated mechanism for raising and lowering the plow andthe elevator, it requiresconsiderableexertiorr on the part of the operator to raise and lower these devices, particularly' to'raise or lower the plow-for rapidly obtaining a ditferent plowing depth or for enabling-the =plowto on=the elevator, it has heretofore'required con-' siderable exertion on thepart-of the operatorto raise the elevator by theordinary manually actuated mechanism, and such adjusting actuation hasbeen relatively-slow. The presentirnproved power aotuatedmec'hanism avoids this exertion and: relatively slowoperation, in both the case of the plow and of the elevator; by providing mechanism which-is operative to raise or -lowereitherthe plow or the-elevator by the quick,-' Sim-- ple' manipulation of suitable clutch and directional controls.

Another object=of the'invention is to provide an improved construction of 1 elevating grader "which can-be quicklyandeasily converted froma type wherein all power for driving 'the'aforesaidpower actuated adjusting mechanism and for driving With regard tothe'eleva vehicle to the grader.

Another object of the invention is to @provide; improved adjusting-mechanism -which can :b'eoptionally operated either by power or manuall-yg'. the :manual -mode of operation taking care er..- possible contingencies when the power source might be. non-aoperating or disconnected;

Anotherrobject of. the invention is to provide improved manually actuated adjusting mech anism for the plow and elevator;

Other objects and advantages of 'the 'invention will appear in the following--detail 'description of a preferred embodiment thereof; lin the'ac companying: drawings illustrating suchembodiment Figure 1 .is a :perspeotivesview 0f the complete construction of one form of our invention;

Figure 2 is a transverse sectional view through thisiform of construction, taken on a plane just forward of the-elevator;

Figure 3 is a transverse sectional 'view taken'on aplane through the forwardmortiom=ot'-'=the"' frame, illustrating the same general construction as Figures 1 and 2 except-that it is modified by the provision of I the r power actuated mechanismfor raisingand lowering the plow and thee1eva--- tor;

Figure4 is-afragmentary planviewillustrating thev lprin'cipal parts of the :p'ower actuated mech-- anism for adjusting the plowand the elevator:

Figure 5 is a schematicperspective view"iI-1us= trating the driving: and control connectionsused' in the power actuated mechanism-for adjusting the plow and-for adjusting the elevator;

Figure .6 is a longitudinal detail sectional 'view through the power 'take-"off' 'oonnectionsemployed when take-off poweris transmitted" from 'the tractor to the grader; and Figure .7 is a fragmentary detail-view ota-mod ified construction wherein the adjusting mechanism :forrthe plow and' 'for the elevator-can be actuated I selectively either by power or manu ally.

Referring to Figure l, the machine comprises a mainframe, designated limits-entirety; winch is mounted on front wheels' i 5*and' rear wheels l 6;- In the preferred; construction shown,- the machine is of the tractor pull-ed type,-sucmbeing desirable struction the front wheels l5 are mounted on a swinging truck I! adapted for draft attachment to the tractor; however, it will be understood from the following description, that numerous features of our invention are also capable of embodiment in self-propelled graders wherein the propelling engine is mounted directly on the grader, and in constructions where the front wheels l5 have swiveled steering knuckle mounting on a front axle. The grading plow is generally indicated at I8 and the elevator is indicated at IS, the plow being disposed at one side of the frame l4, and the major length of the elevator projecting laterally from the other side of the frame. In the preferred construction the discharging end of the elevator apparatus is disposed laterally of the frame for side loading, although it will be understood that certain features of our invention are also applicable to elevating graders of the type wherein the elevator apparatus is arranged for end loading into a vehicle in front or in rear of the grader.

.The detail construction of the main frame I4 is fully described in our aforementioned patent, No. 1,981,170, and accordingly in the present specification we shall only describe the main elements of the frame, reference being had to the parent application for the detail elements of the construction. The backbone of the frame comprises a torque tube 21 preferably consisting of a length of heavy steel tube or cylindrical pipe extending substantially from end to end of the frame and disposed substantially medially between the sides of the frame. Rigidly secured to the front end of said tube is a J-shaped steel member 22 which extends downwardly and forwardly for supporting a king pin 23 which establishes a ball and socket joint 23a with the front wheel truck Il. Rigidly secured to said tube at different points back along its length are three brackets or attachment fins 24, 25 and 26 (see Figures 1, 2 and 4) Radiating from these attachment brackets 24, 25 and 26, respectively, are the transverse frame structures 21, 28 and 29. The front and intermediate transverse frame structures 2! and 28 are quite similar in that they each comprise relatively long vertical frame bars 21a, 28a at the right hand side, relatively short vertical bars 27b, 281) at the left hand side, and transverse top bars 210, 28c extending between said vertical bars. Suitable diagonal bars have their inner ends rigidly secured to the attachment brackets or fins 24 and 25, and radiate outwardly for attachment at their outer ends to the above described vertical and horizontal bars of the frame structures 21 and 28. The rear transverse frame structure 29 comprises a suitable rectangular arrangement of frame bars having attachment to the rear bracket 26 mounted on the torque tube 2!. The rear axle 3|, preferably a dead axle, on which the rear wheels l6 are journaled, is suitably bolted to the underside of this rear transverse frame 29. It will be seen from the foregoing that each of the three frames 21, 28 and 29 is rigidly reenforced against vertically acting stresses by the torque tube 2 I.

All three frames, 21, 28 and 29, are preferably tied together and to the front end of the torque tube 2| by longitudinally extending side bars 31, 31a. The intermediate portions of said side bars are suitably secured to the frame structures 21 and 28, and the forward portions of said bars converge together for attachment to a bracket 38 which is suitably secured to a front attaching flange 221) on the front casting 22. The rear ends of said side bars are bent downwardly for attachment to the upper corners of the rear frame structure 29. As previously remarked, the pin 23 mounted in the lower end of the front casting 22 has a ball 23a at its lower end which seats in a spherical socket provided in the transverse axle portion l'la of the front truck l1, whereby all steering movement occurs around this ball and socket joint, as well as transverse rocking movement of the truck relatively to the frame. It will therefore be seen that the main frame, and its torque tube 2i, has a three-point support, one point at the aforesaid ball and socket joint and the other two points at the rear wheels l6, 6.

The plow I8 may be of the disk or of the moldboard type, the disk type being preferred, however. The plow is adjustably supported on a plow beam 44 which in turn is also adj ustably carried by the main frame. The disk element is mounted on a bracket 45, relatively to which the disk can be rotatably adjusted for presenting new cutting edges to the ground, and the bracket 45 is secured to a bar 46 depending from the draft beam 44. A diagonal brace bar 41 extends from the lower end of the vertical bar 46 up to a bracket 48 secured to the rear end of the plow beam. Said vertical bar 46 has adjustable connection with the plow beam 44 for enabling the plow to be adjusted forwardly or rearwardly along the length of the beam, the diagonal brace bar 47 having its point of connection to the bracket 48 also correspondingly adjustable forwardly or rearwardly. The lower end of the diagonal brace bar 41 is connected with the lower portion of the plow supporting bar 46 by a shearable pin or bolt 49 of predetermined size. In the event of the plow striking some immovable obstruction this pin or bolt 49 will shear, allowing the plow and its supporting arm 46 to swing back for clearing the obstruction. Adjustably secured to the forward end of the plow beam 44 is a vertical standard 5| carrying a runner or deflecting shoe 52 at its lower end. This runner functions as a deflector for enabling the plow to pass over large obstructions, and may also be used as a gauge element for maintaining a desired depth of grading cut by the plow. The outside tread widths of the wheels I5, I 6 are preferably such as to cause the adjacent front wheel l5 to run in the furrow or graded level made by the previous trip of the machine and to cause the adjacent rear wheel i6 to run in the new furrow or graded level directly behind the plow I8.

The lateral position of the plow beam 44 is maintained by two transversely-extending beams 54 which have operative connection with the plow beam at points forwardly and rearwardly of the plow. Fig. 3 illustrates the forward one of these transverse beams, both of which extend across the width of the frame and have their further ends pivotally mounted on horizontal pivot pins or bolts 59 which are mounted at the righthand sides of the frame structures 21 and 28. Each of these frame structures carries a pair of spaced angle bars 58 and the pivot pins 59 extend between said angle bars, being removably mounted therein. The transverse beams 54 pass through the spaces between the respective pairs of angle bars and are provided with spaced holes 6| for receiving the pivot pins 59. The beams can tilt up and down around said pins, and by relocating the pins in different ones of the holes 6| the beams can be shifted inwardly or outwardly for adjusting the transverse position of the plow beam 44 and plow with respect to the side-of-the frame. Referring :to Figurefi; the connection'betweeir each transverse P beam 54 and the longitudinal plow beam 54 Mis -preferably; established by apinl 63 ypro'jecting. from the end of the transverse beam: and passing through. an aperturedlug 64 extendingtdownfrom the plow; beam; and alsorby: an'zextensible.and;contract ible link =65: compris'inginner. and: outer" telescoping: link sections; the; lower link section being pivotally connected to a bracket iii-rprojecting from the transverse beam and the upper link; section being pivoted to a bracket 61' secured,

to. the top of thelongitudinal plow beam 44.

Aipin 68 may be employed to secure: the two link sections in any linear adjustment for thepur pose of inclining. the plowi beam M' at any-{desired angle relativelyrto' the transverse beams-5&2

the mounting-of" the apertured'lug 6 1' onthe pin 63 aifordingsufficient play'to' accommodate such rocking movement. The'conn'ection of 1 the plow beam tothe rear transverse beam 54 is. sub stantiallya*-duplication of that justrdescribeda Draft force is transmitted to the plow mount-v ing parts by a draft-linki llwhich has asclevis l2 at'its rear endv pivotally connected to :3; stirrup: l3 which in'turn iswpivotallylconnected with the front'transversezbeam 54: 'The'frontzend' of the draft link H hast-a :clevis like theclevis '12 which is pivotally connected with a diagonal bracket 25 rigidly secured to the J-shaped front casting22; A turnbuckle iii in the link H enables thelength-of this link to beadjusted; Such dr-aft connection does not interfere-with the low-:

ering randclelevating movement "of the plowibeam' M- andtr'ansversebeams 54. t I

The vertical position of thezplowlil 8'! and 82i (Fig; 1) :which have operative'rco-nnece tion with the'i plow beamMr'atpoints forwardly and rearwardlyof the. plow.-- The" rear connection 82'Lpreferably'consists of abar I01 linklhav ing av ball "an d'vsocket' connectionl 83* with a" bracket fixture projecting: inwardly-z from the rear portion of the'plow beam. vi This rearbar 82' functions as a1stiffeleg through-:which the plow can beraised or'through which pressure can be forcibly {exerted L downwardlyi on the: :plowrfor forcing; it 1 into .the ground: :It is Zthrough this prise a stiff'member; but in -the gpref-erred cone struction it comprises; at chain looping! dG WI1; around a sheave '85 which has its'gclevis. ipivoted' to theplowbeam M." One end of this ,-'chain loop has fixed attachment to a frame structure 85 comprising threebars projecting outqover the beam. The :other end of said chain passesupwardly over a sheave -81 (Figure 4) on said frame structure 86 thence extends backwardly for winding about a transverse shaft -88.-

Saidshaft may be arranged to rotate inone; direction 'or the 'other'foriraising or lowering thefront portion of thel'plow beam 44 under the control of mechanism such EtSzEXWOIIIl and worm wheel or a pawland ratchet lever 89' and suitable controlling dogs-or tpawlst The elevator l9 :has-a frame comprising-spaced side channels 9! suitably reenf orced by cross bracing members, andcarrying,aIhead roller 92 at its upper end andafoot mnersrat itslowerend around which'travels' theconveying belt 94. A spring actuated lidle'r' roller. 95 passes'upwardly'againstthe' return run of the beltdirect -is gov-y erned byfront and: rear adjusting connections lysback ofitheheadi r'o1ler192; The-'lower endsof the elevatorreceivesathe dirt-directly from-the plow- I8; and'sideboards .96 confinethe dirt on the upwardly traveling-run of the beltasit is carried up, to the delivery point: The elevator: inclinesv downwardly through" the large 3 openingwor bay 98rdefined, between the frontand -.intermediate frame-structures 21; 28. "The lower portion of, the-velevator frame has vertically swinging; connection-with the main frame, estab-lished by swinging-links! 0 l i (Fig. 2) arranged at each side 'of the elevator frame and having their swinging sends pivotally=connected1 with. brackets l02secured-=to each side of the elevator frame andhaving their oppositeends pivotally mounted-in U-shapedbrackets: [03 (Fig. 2).,

which' la-tter brackets are secured to the vertica-l framevbars zlweandiila, of the front and intermediate transversewframe structuresil and 28." wide ground engaging; runner i 66; having anuptnrneidefiecting toe at its frontendis operatively;connected with the lower end-of the elevator for sliding along the ground inrimmediate proximity to the plow l8, this runneror: shoe "extending, rearwardlyunder the -f oot roller 93-to protect the-latter and the belt :94 fromcthe; ground, andxin some instances to" sustain part -of the: weight of this endbf the elevator on the ground; Flexible-link-connections are established between the front and rear endsof this runner- IM and 1 front and rear portions of' the main frame to: sustain any fore an-daft forces acting against this lower endyof the-elevator.

Vertical adjustments-0f the elevator are e'ffected through a lower; pair of chains H connecting with: the lower" portion of the: elevator, and :through an upper pair of chains H2 con necting with the upperand intermediate por-- tionsiof' the elevator: Referring to Fig. 3; .the' lower chains-H I are disposed one at'each side of-the elevator? frame and each chain is -reeved around a sheave H l connected to the elevator: and around a sheave H5 suspended from th'eframe; The take-up end of each chain is'wound arounda longitudinally extending shaft I'I Gro tatably supported on the transverse frame-strum tures Hand 28. Any; suitable actuating mechanism istoperatively connected with saidishaft for causing rotation thereofin one directionorthe other" to raise or. lower this end 0f the elevator frame. An operators platform-l2! is provided-at the rear endof 'the :machine, extending from the intermediate frame structure :28 .to-the rearframe structure-29, andthis actuating mechanism for turning the shaft 1 I5 is disposed for convenient operation 'by an operator standing, on said platform.

Referring now to the :upper pair of chains =l l2, it :will berseen from Fig; 4 that the take-up ends of: these two chains both wind upon a rotatable adjusting shaft I22 which-is suitably journaled in' bearings-'l23-iand i24supported on the horizontal top rails 21c and 28a of the front-and in termediate frame structures 21,- 28. From this wind-upshaft, thetwo chains extend upwardly and outwardly over==idler sheaves l- 25- rotatably mountedon the sup-po-rting shaft 1-26 which has supportingbrackets I 21 secured to .the upper ends 0f theivertical frame bars, 21a, 28a. The

chains extend outwardly from these idler sheaves.

and arelooped around sheaves I28 at each side oflthel elevator frame, each of said sheaves L28 being connected with the elevator framethrough a'pivotedlink l29. From said outer sheaves I28 the" chains extend 'back overa second pair" of idler sheaves I3I also mounted on the supporting shaft I26, and thence extend downwardly for attachment through pivoted link bars I32 with intermediate points of the elevator frame, the pivotal connections between said link bars and the frame being indicated at I33. From the foregoing it will be seen that rotation of the wind-up shaft I22 will either take in or pay out the chains H2 and thereby-raise or lower the outer portion of the elevator; it being noted that each chain I I2 applies its force to the elevator at the points I28 and I33, thereby establishing in effect a resultant force which acts on the elevator at a point intermediate these two points. The ad- .justability of the elevator effected through the chains II2 enables the outer end of the elevator to be raised or lowered for clearing load receiv-- ing trucks and wagons of different heights, and also enables the elevator to be retained in its desired angular relation to the horizontal as the rear axle of the grader inclines under different operating conditions. We shall hereinafter describe the mechanism for rotating the wind-up shaft I22.

The elevator comprises two relatively foldable sections which enable the outer section to be folded upwardly for passing across narrow bridges and through other restricted spaces. The hinge line between the inner and outer sections is substantially coincident with the pivot centers I33 to which the inner ends of the chains I I2 are attached. Normally the two sections are held in rigidlycoextensive alignment by splice bars I35 which are bolted to the two sections across the hinge axis. To permit the outer section to be folded upwardly, it is only necessary'to unbolt these splice bars and to remove short sections of the side-boards 96 directly above the hinge axis, whereupon the outer section of the elevator can be swung up to an approximately vertical position. At this time the inner section may be allowed to rest on the longitudinal brace bar M (Fi 2).

A power drive is transmitted to the belt conveyor 94 through a drive chain I38 which extends outwardly over a sprocket wheel I39 (Fig. 1) mounted on one end of the shaft carrying the head roller 92. The inner loop of this chain passes around a sprocket wheel 'I4I (Figs. 3 and 4) secured to a power countershaft I42 suitably journaled in bearings I43. These bearings I43 are mounted on an auxiliary frame structure I44 carried by the transverse frame structure 21.

The upper run of said drive chain passes over an idler sprocket I45 journaled in the outer end of a swinging link I45 and normally urged upwardly by a tension spring I45" whereby sufii cient slack can be provided in the chain to accommodate the various vertical adjustments of the elevator without having the upper run of the chain sag down and become fouled with any of the other parts. The countershaft driven by a large sprocket wheel I45 secured thereto, over which passes a drive chain I41. The loop of this chain encircles the torque tube 2| and passes over a sprocket wheel I48 directly below said torque tube and also passes over a sprocket wheel I49 which is drivenby a gasoline engine power plant I5I. The sprocket wheel I48 has an anti-friction bearing mounting on a stub shaft I48? which is supported in a bearing I58 (Figs. 1 and 3) which is secured to the attachment bracket 24. Referring to Fig. 2, the bed of the engine is supported at its rear end on a bracket 25m. projecting as an integral part of the attaching fin 25 and on a bracket I52 secured to a horizontal bar 289 constituting part of the intermediate frame 28; and the front end of the engine bed is supported on a similar arrangement of brackets onthe attaching fin 24 and on a bar of the front frame 21 corresponding to the bar 289. It will be noted that the weight of the engine serves in a counterbalancing capacity to counterbalance a part of the overhanging weight of the outer end of the elevator and the load carried thereby, and also serves to aid in holding the plow down in the ground. The location of the engine closer to the plow side of the frame is ahelpful factor in the above. and its location between the vertical planes of the transverse frame structures 21 and 28 avoids twisting stresses in these frame structures. The engine is preferably housed against dirt and has a cleaner for its air supply, etc. Referring to Figs. 3 and 4, a housing I55 at the front end of the motor encloses a conventional clutch and a speed reducing gear mechanism which are interposed in the driving train between the crank shaft of the motor and the sprocket wheel I49; The driving of the belt conveyor with its relatively heavy loads of soil requires a considerable amount of power and it is preferable to employ a separate engine on the grader for driving the conveyor, substantially as described above, so as to relieve the tractor of this duty and enable its full power to be devoted to traction effort, particularly with a grader of large excavating capacity. However, the present construction can be quickly converted into a type of machine where this power is derived through a power take-off attachment extending back from the tractor. It will be noted that the front supporting casting 22 is provided with a hole I51 extending longitudinallyl therethrough directly below the torque tube 2I, and in adapting the I rear end of the extension shaft I58 is seated in This ex-' the bearing I50 for rotation therein. tension shaft carries a small sprocket wheel I59 similar to the sprocket wheel I48 for transmitting a chaindrive to the large sprocket wheel I46. This is the preferred manner of effecting the conversion but as an alternative method the stub shaft I48 and sprocket wheel I48 may be left in place, and the rear end of the extension shaft I58 may be provided with any suitable driving A socket or coupling for establishing driving connection with said sprocket wheel I48. When power is thus transmitted from the extension shaft I58, either through the small sprocket wheel I59 mounted directly thereon, or through a coupled connection with the sprocket wheel I48 on the stub shaft I48, it is preferable to use a shorter chain I41 which will pass directly over the top of said small'sprocket wheel I59 or I48, under the torque tube 2I, and directly to the top of the large sprocket wheel I46. This is the driving arrangement adopted when the grader has no engine I5I and receives all power for the elevator through the power take-01f attachment and would also be the preferred arrangement in cases-where the grader has an. engine but where the power take-off attachmenthas been installed for .an. emergency situation,.-such as because of failure of the engine. However, in the latter case,- where the grader has an engine, and the power take-off attachment is installed for an emergency, the chain travel might be left as indicated in Fig. 3, with the run of the chain traveling from the sprocket wheel I48 up to sprocket wheel I49 normally driven by the engine I5I, in which case the engine clutch within the housing I55 would .be disengaged.

The forward portion of the extension shaft I58 is journaled in a bearing IEI (Fig. 6) which is mounted on a bracket I62 adapted to be secured to the front-side of the-supporting casting 22. This end of the shaft has a coupling connection I58, either of polygonal formationior of tapered formation with'a key, for socketed-engagement in one section of a universal joint I64. An extensible shaft Hi5, comprisingtwo telescoping shaft sections of polygonal crosssection extends forwardly from thisv universal joint and connects-with a front universal joint I66 which is in turn adapted to be connected with any conventionalpower take-off shaft on-the tractor. Itwill beseen from theforegoing that our improved construction enables one fixed design ofgrader to-..be readily converted to-an arrangement for driving the elevator andadjusting mechanism from an engine on the grader, or to an arrangement for driving the elevator. and adjusting mechanism from a. power take-off attachment extending .from the tractor; and in the former case it .also enables the powerv takeoff attachment to be readilyapplied for emergency situations in the event of engine failure. If desired, the power take-off extension shaft I58 may remain permanently assembled in graders providedwith anengine, for immediate emergency use. i

The mechanism-for vertically adjusting the plow l8 and forvertically adjusting the elevator I9 is illustrated in two.embodiments-one manually actuated as shown .in Figs. 1 and 2, and the other power actuated as shown in Figs.- 3,4 and 5. Referringtothe :manually actuated embodi- 'ment, the upper portion.- of the stiff leg member 82 for adjusting the plow I8 is formedwith rack teeth 82' along its inner edge which mesh with a pinion I'II (Fig. 5). This pinion is secured to a longitudinally extending shaft I12 which is journaled inbearings I13 secured to the upper corners of the transverse frame structures 21 and 2B. A yoke I14 ismounted onsaidshaft and carries a roller I14- at. its outer end which embraces and bears against the back edge of the rack bar.82..for= holding; thetlatter in mesh with the pinion I1I. Supported in convenient position. for actuation from the operators platform I2I is a hand wheel I15-which'is operatively connected to rotate the shaft I12 through-speedieducing gearing comprising sprockets and chains or cooperating gears: whereby the necessary mechanical advantage is afforded for enabling the rotation of the hand iwheel I15 toexert aheavy thrusting force on the rack bar 82 to thrust the plow into the ground or -toraise it to an elevated position. Any suitable: locking mechanism' may be associated with or. embodied inthe speedreduction mechanism I16 for holding the rack bar 82 at any desired point of adjustment. The mechanism for manually adjusting the elevator I9 also comprisesa hand-wheel I81 suitably supported for actuationfrom the :operators -platpower countershaft form. As shown in Fig. 2, this hand wheel rotates a pinion I82 which meshes with a large spur gear I83 secured to the Wind-up shaft I22.

'I-Ience, rotationofthe hand wheel I8I in one a reversing. gear jack shaft I9I which is rotatably supported. inisuitable bearings I92 mounted on a platform .or .supporting plate I93. This supporting plate. is .-secured to the transverse frame structure. Hand to .a transverse frame bar I94 extending-between the longitudinal bars 31, 31a. Mounted'for independent rotation on said jack shaft are two bevelgears I95 and I91 which .mesh with a third bevel gear I98 mounted on a stub shaft disposed at right angles to said jack shaft. This stub shaft is journaled in a bearing I99 and carries a sprocket wheel 20I at its outer end. A clutch collar 282 is splined to the jack shaft I9I between the gears I96, I91. for shifting movement to effect clutching between said jack shaft and either vone of said gears selectively, as shovm inFig. 4. Ashifting yoke 205 engagesin an annular groove in the clutch collar for shifting the latter, and this yoke is mounted on a vertical shaft 286. suitably supported J for oscillation. .An. arm 2Il1 extending forwardly from saidvertical shaft is operatively connected through .alink2ll8 with an arm 289 secured to. a longitudinally extending shaft 2I I, the latter shaft having suitable bearing support at brackets '.2I2.secured to the front and rear frame structures .21 and 28. .A control lever2I4 extends upwardly from the-rear end of said shaft 2II, in position for convenient actuation from the ..operators,platform' I2I, andit will be evident thatmotion. of said control lever in one direction or the other is operative to place the reversing gearing I96, I91, I98 in condition for transmitting rotation in either' direction to the sprocket wheel 28I. f I

A chain 2 I6 extends from this sprocket wheel up to a sprocket'wheel 2I1mounted'on a transversely extending shaft 2I8. The latter shaft has bearing support'in a journal hub on the outer end of 'a bearing arm '2I9,'and the'inner end of this shaft is adapted to transmit power to worm gear mechanism enclosed in a housing 22]. Said housing is'suitably supported on the transverse frame structure'21 (thebearing arm 2I9projecting outwardly from said housing) and the worm wheel in said housing is operatively coupled to the wind-up shaft I22 on'which the chains II2 are wound'for raising the elevator. The shaft on which the wormis mounted projects laterally from said housing in "ali-n'ement with the shaft 2I8 and carries a jaw clutch 223 on its projecting-end. A cooperating jaw clutch 224' is shiftably mounted on the shaft 2H! and is shifted into and out of clutching engagement with the clutch: element. 223 through the actuation of a shifting yoke 225 which. hasoperative connection' with-4a shifting collarnassociated' with the clutch element 224. The shifting yoke"..2 25 :=has

pivotal mounting in a bracket 226, and is actuated by control connections which we-shall presently describe.

The opposite end of the transverse shaft H8 is operatively connected through a universal joint 228, shaft 229 and universal joint 23! with another transverse shaft 232 which is arranged to drive a second worm gear mechanism 233, similar to the above described worm gear mechanism 22 I. The housing of said latter mechanism is likewise suitably supported on the transverse frame structure 21, with a bearing arm 234 extending inwardly therefrom and providing a bearing boss for the shaft 232. The worm wheel in the housing 233 is operatively connected with the shaft I12 which drives the pinion I1! serving to raise and lower the plow. Also, like the aforementioned worm gear mechanism, the shaft of the worm projects outwardly from the housing and carries a jaw clutch element 235 which is adapted to be engaged by a cooperating jaw clutch element 236, shiftably mounted on the shaft 232. Shifting of the latter clutch element is accomplished through a shifting yoke 231, having coaction with a shifting collar associated with the clutch element 236, and this yoke 231 is mounted on the end of a longitudinally extending shaft 238 which has support in bearing brackets 239 on the transverse frame structures 21-and 28. An arm 24! depending from the rear end of said shaft is operatively connected through a link 242 with a control lever 243 which is pivotally supported on the frame structure 28 in convenient position for actuation by the operator standing on the platform !2!. The two shifting yokes 225 and 231 are made to swing correspondingly with the rocking of the shaft 238 through a tie link 244 which is pivotally connected with both yokes. The control lever 243 plays in a slotted plate 246 and has a detent lug 241 which is adapted to engage in any one of three notches 248, 249 or 250. When the detent is engaging in the central notch 248 both shiftable jaw clutches 224 and 236 are held in their disengaged positions whereby no power is transmitted to either of the wormgear mechanisms 22! or 233. Swinging of the lever 243 to place the detent 241 in the notch 249 is operative to shift the jaw clutch 224 into driving engagement with its companion clutch element 223, at the same time more widely separating the other two clutch elements 236 and 235. Power can now be transmitted to the worm gear mechanism 22! for rotating the wind-up shaft I22. Swinging the control lever 243 in the opposite direction to place the detent in the notch 25!] is operative to swing the yokes 225 and 231 in the opposite direction for establishing clutching engagement between the clutch elements 236, 235 and more widely separating the clutch elements 224, 223. At this time power can be transmitted through the worm gear mechanism 233 to the pinion I1! for adjusting the plow I8. It will thus be seen that by appropriately placing the lever 243, operative connections may be established for transmitting power to the wind-up shaft I22 or to the pinion I1!, and by appropriately actuating the control lever 2I4 a drive can be transmitted to these devices in either direction for raising or lowering the elevator or for raising or lowering the plow. It will be understood that the plate 246 with its notches 248256 is only typical of different types of locking devices which may be employed.

It will be observed that the sprocket wheel I46 and its shaft I42 constitute in effect a power driven member which can selectively receive power either from the power plant I5! or from the power take-off attachment I64, I65, I66; i. e., the sprocket wheel I49 constitutes means fordriving the power driven member I46 from the power plant I5I; and the sprocket wheel I59 (or I48) and its shaft I58 constitute means for driving the power driven member I46 from the power takeoff attachment 164-466. It will also be noted that two trains of motion transmitting parts branch from a singlereversing mechanism I96, I91, I98, one to the plow and one to the elevator:the train of motion transmitting parts extending to the elevator comprises the chain 216, shaft 2I8, clutch 223, 224, worm gear mechanism 22!, shaft I22 and chains II2; while the train of motion transmitting parts extending to the plow comprises the chain 2I6, shaft 229, clutch 235, 236, worm gear mechanism 233, shaft I12, pinion I1! and rack bar 82. By interposing the reversing mechanism I96, I91, I98 between the power drive-n member I46 and the point where the two trains of motion transmitting connections branch apart toward the elevator and toward the plow, the same reversing mechanism is operable to selectively transmit reversed directions of adjusting motion either to the elevator or to the plow.

In a machine provided with power actuated adjusting mechanism for adjusting the plow or adjusting the elevator; such as is illustrated in Figure 5, it might 'be desirable at times to be able to adjust either the plow or the elevator manually, as would be true if the adjustment of either of these were desired when no source of power was operative or functioning.

Figure '7 illustrates a modified arrangement by which the adjustments of the plow or of the elevator can be performed selectively either by power or by hand. The stub shaft which carries the bevel gear I98 at one end and the sprocket wheel 253! at the other end, which stub shaft is here designated 266, is provided in this modified arrangement with another bevel gear 26! mounted on the outer end thereof between the sprocket wheel 26! and the bearing boss I99. This additional bevel gear 26! meshes with a bevel pinion r 262 which is rotatably mounted on the end of a shaft 263. The latter shaft is journaled in two spaced bearing brackets 264 and 265 which are secured to the platform or supporting plate I93. Between these bearing brackets the shaft 263 is provided with a spline along which slides a clutch collar 261 having jaw teeth in its front face. This clutch collar is adapted to have clutching engagement with cooperating jaw teeth in the adjacent face of a second clutch collar 263 which is freely rotatable on the shaft 263 and which has driving connection with the bevel pinion 262 through the medium of a sleeve extending from the clutch collar 268 forwardly through the bearing 264 to the bevel pinion 262. The rear end of the shaft 263 is connected through'a universal joint 21! with a shaft 212 which extends rearwardly and upwardly, passing alongside the engine I5!, and having its rear portion supported in a bearing bracket 213 which is suitably secured to one of the frame bars of the transverse frame structure 28. A hand wheel 214 secured to the rear end of this shaft 212 is disposed in convenient location for actuation by the operator standing on the rear platform !2!. A pull rod 216 is actuatable from a point in proximity to the the elevator. from the hand wheel: can Joe-directed; selectively to adjust the-plow or to a'djust the elevator through 'the appropriate shifting-- of the control wheel: 2.14:; and; this pullrrod. extendsudown: to the clutch parts 261, 268, where itis linked'to :a shifti-ng; lever or 'yokeiz'l 8 asuitab'ly: pivoted: to the. platform I93. *This shifting leveror'yoke has suitaable engagement .Withfian: annular groove in the shiftable clutch: collar 26:1, whereby upon rearward actuationof the: rod 2161 the clutch: collar 261 is pulled out of engagement with the -clutch collar 268,- and onforward motion of the-rod-ZHi the two :clutchparts are cooperatively-coupled. When the adjusting operations are being performed by power the clutch-parts:.Ztl'l =andi268 are preferably uncoupledso that nomotion is transrnitted to the 'hand w-heell 214. In the event that it is desired toadjust either theelevator or the 'plowindependently' of the transmission of :any

powerto-thegear set I96-l98, it isz-only necessary to shift the clutch collar 202 of this reversing-gear setinto neutral position; and to couple the two clutch collars 261,-268, whereupon rotation of the hand wheel 214 inthe:appropriate'dlrection is operative to eitherrai'seor lower the -pl'ow or The 'rotative motion transmitted lever 243, for directing suchmotion eithertothe shaft I22 or to theshaft I12. The'worm gear mechanisms Hi and 233 are preferably; although not essentially; of the non-reversible type so that any: adjustment transmitted therethrough: to the elevator and to the -plowis'self-locking at the respective worm mechanism. :By' :ha'ving'the manually operated adjusting motion transmitted from the wheel 2'l4 to thewormi'zdriving shafts ZIB and 232, this none-reversiblecharacteristic does not interfere with thesemanual adjustments,

and in fact makeseaclrnfrthesermanualadjustments' also self -locking.

All forces-created .byzthepverhanging weight of the :elevator and :bywthevertically: acting stressessofr' the tplovr..are:born'e::by theithreezpoints of support of" the frame, :represented :by. the two 7 rear wheels. I6 and by'the ballzandsocket jointt23a.

'IEhis three-point support. of the: frame enables .the" maj or"v portions of the aforesaid: stresses to .be'borne :as: torsion loads" on :the' torquertube: 2 l "8211135 fullysdescribed in :ourr-earliernapplication"of which this is a division.

While we have illustrated-and;described-What -'we "regard to be the x preferred embodiment =':0f

our invention, nevertheless itrwill be understood that such a merely exemplaryy-and thatnumerous modifications andrearrangementsoipartsrmaybe made without departing: from the: essence of: the invention.

We claim:-

1. In an elevating-grader,'thezcombination of a wheel supported frame; a -grading-:plow::operative.- 1y connected with said frame, a-nrelevatorztsnp ported on said frame for loading the'ssoil broken up by said plow, andpowernactuate'd'. mechanism for adjusting said plow andsadjnsting :sazidrelevato-r; said power actuated mechanism. including reversing mechanism for transmitting :adjusting motion to said plow anditozsaidvelevator' in opposite directions, and including melt-locking mechanism for automatically :holding: the oplow and elevator in the'diiferentpositions towhich they have been adjusted.

2. In. an elevating" grader; the combination: of a wheel supported frameyaigrading:plowmperativelyconnected with said frame,.zan elevator supported on said frame for loading the soilrbroken up by. said. plow,.':and1poweraactuatectmechanism for: adj ustinghsaidsplow': adjusting said; elevator comprisingka power driven member, reversing mechanism. zreceiving 1power from said power driven member; a train of motion transmitting partsextending from said reversing mech- .ani'sm -tosaid: plow, a train of motiontransmitting parts extending from said reversing mechanism tovsaid elevator, and means'for selectively controlling the transmission of motionthrough each'tof said trains-of motion transmitting parts.

3.7In anelevating grader, the combination of :aiwheel supported frame, a grading plowoper- :atively'. connectedwith said frame, an adjusting member 'operatively connected with said grading plow and comprising a rack, a pinion meshing with said rack and :.adapted to transm-itzmotion thereto for raising or lowering said grading plow, ani elevator:supported onsaidframe for loading the soillbrokenup bysaid plow, means for raisingzan'd-loweringsaid elevator comprising a winding member -andi. a flexible member operativel'y connected with said. elevatorand adapted to be awound. upon .aand zunwound from said winding :member, power-actuated mechanism for adjusting said:.:p1ow and adjusting said elevator comprising apowerdriven 'member, reversing mechanismr receiving power "from said 1 power driven member; atrain of motion transmitting parts extending from saidreversing mechanism to said -pinion,.- a train :ofmotion transmitting" parts extending from: saidw reversing mechanism: to said xwinding member; and; means forselectively controlling theltransmission of motion through each .of'lsaid' trains: of motion: transmitting parts.

I 4 .Inahelevatinggrader, the combination of a wheel supported'frame,-a=grading plow operatively connected 1 with: said frame, an elevator sup- :portedwonssaid frame for loading the soil "broken "upsby'saidrplow, and; power actuated mechanism.

"for' adjusting said :plow and adjusting said elevator compnising-apower driven member, reversing mechanism receiving: power from said power driven-rmember, a train of motion transmitting "parts extending-from said reversing mechanism tosaid'plow, a trainof motion transmitting parts extending from saidreversing mechanismto said elevator, clutches interposed in each of said trains of motion transmitting "parts, control means for controlling said reversing mechanism for *transmitting motion in either direction to *eitherof 'saidtrainswof motion transmitting parts,

and control means for selectively engaging or disengaging'said' clut'chesto control the transmission of 1 such motion through either ofsaid trains "fromsai d powercperated member or from said manually-operated member to -said driving member.

6. ln an'el'evating grader, the combination of a wheel supported frame, a grading plow operative- -1yr-c0nnectd=-with said frame; means for adjust- ;ingxsai'd" grading :plow comprising-a rack operatively: connectedwith the: p1ow-= and a pinion 1 for transmitting motion to said rack, an elevator supported on said frame for loading the soil broken up by said plow, means for adjusting said elevator comprising a winding member and a flexible member operatively connected with the elevator and adapted to be wound upon and unwound from said winding member, a power driven member, reversing mechanism receiving power from said power driven member, a train of motion transmitting parts extending from said reversing mechanism to said pinion, a train of motion transmitting parts extending from said reversing mechanism to said winding member, means for selectively controlling the transmission of motion through each of said trains of motion transmitting parts, and manually operated adjusting means operative to transmit adjusting motion to said pinion and to said winding member through said trains of motion transmitting parts.

7. In an elevating grader, the combination of a wheel supported frame, a grading plow operatively connected with said frame, an elevator supported on said frame for loading the vsoil broken up by said plow, power actuated adjusting mechanism for adjusting'said plow and adjusting said elevator comprising a power driven member, a train of motion transmitting parts extending from said power driven member to said plow and including worm gear mechanism, a train of motion transmitting parts extending from said power driven member to said elevator and including a winding member, and means for selectively controlling the transmission of motion through each of said trains of motion transmitting parts.

8. In an elevating grader, the combination of a wheel supported frame, a grading plow operatively connected with said frame, an elevator supported on said frame for loading the soil broken up by said plow, a power plant mounted on said frame, a power take-off shaft mounted on said frame adapted to have operative connection with a power take-off device on a separate propelling vehicle, reversing mechanism mounted on said frame, and means for transmitting power from said power plant or from said power takeoifshaft to said reversing mechanism, mechanism for adjusting said plow and adjusting said elevator comprising a train of motion transmitting parts branching from said reversing mechanism to said plow and comprising a train of motion transmitting parts branching from said reversing mechanism to said elevator, and means for selectively controlling the transmission of motion through each of said trains of motion transmitting parts.

9. In an elevating grader, the combination of a wheel supported frame, a grading plow operatively connected with said frame, an elevator supported on said frame for loading the soil broken up by said plow, a power plant mounted on said frame, a power take-off shaft mounted on said frame adapted to receive power from a power take-off device on a propelling vehicle, reversing mechanism mounted on said frame, means for transmitting power from said power plant or from said power take-off shaft to .said reversing mechanism, a train of motion transmitting parts extending from said reversing mechanism to said plow, a train of motion transmitting parts extending from said reversing mechanism to said elevator, and means for'selectively controlling the transmission of motion through each of said trains of motion transmitting parts, and manually operated adjusting means for transmitting adjusting motion to said plow and to said elevator through said trains of motion transmitting parts.

10.'In an elevatingigrader adapted to be propelled by a separate propelling vehicle, the combination of a wheel supported frame, a grading plow operatively connected with said frame, adjusting mechanism for adjusting the position of said plow relatively to said frame, a power plant mounted on said frame, a power take-01f member mounted on said frame adapted to be operatively connected with a power take-off device on said propelling vehicle, a manually operated adjusting member mounted on said frame, and means for transmitting motion from said power plant or from said power take-off member or from said manually actuated adjusting member, to said adjusting mechanism for adjusting the position of said plow.

11. In an elevating grader adapted to be propelled by a propelling vehicle, the combination of a wheel supported frame, an elevator supported on said frame, adjusting mechanism for adjusting the position of said elevator relatively to said frame, a power plant mounted on said frame, a

power take-off member on said frame adapted to have operative connection with a power take-off device on said propelling vehicle, a manually operated adjusting member on said frame, and means for transmitting motion from said power plant, or from said power take-off member or from said manually actuated adjusting member, to said adjusting mechanism for adjusting the position of said elevator.

12. In an elevating grader, the combination of a wheel supported frame, a grading plow connected with said frame, a power operated member mounted on said frame, a manually operated adjusting 'member mounted on said frame, and

mechanism actuatable selectively either from said power operatedv member or from said manually actuated adjusting member for raising said plow or for exerting positive downward pressure fro-m said frame'to said plow independently of travel of said grader, said mechanism including selflocking mechanism for automatically locking said plow in its different positions of adjustment.

13. In an elevating grader, the combination of a wheel supported frame, a grading plow carried by said frame, an elevator carried by said frame for loading the soil broken up by said plow, a power driven member on said frame operative to transmit power independently of the motion of said grader, a train of motion transmitting parts extending from said power driven member to said plow for effecting vertical adjustment of the plow, a train of motion transmitting parts extending from said power driven member to said elevator for effecting vertical adjustment of the elevator, and control means for selectively controlling the transmission of motion from said power driven member through either of said trains of motion transmitting parts and in either direction of motion.

14. In an elevating grader, the combination of a wheel supported frame, a grading plow carried by said frame, an elevator carried by said frame for loading the soil broken up by said plow, a power driven member on said frame operative to transmit power independently of the motion of said grader, a train of motion transmitting parts extending from said power driven member to said plow for effecting vertical adjustment of the plow, a train of motion transmitting parts extending from said power driven member to said elevator for effecting vertical adjustment of the elevator,

and control means for selectively controlling the transmission of motion from said power driven member through either of said trains of motion transmitting parts, including a single reversing mechanism for transmitting either direction of motion through either train of parts.

15. In an elevating grader, the combination of a wheel supported frame, a grading plow carried by said frame, an'el'evator carried by said frame for loading the soil broken up by said plow, a power driven member on said frame operative to transmit power independently of the motion of said grader, a train of motion transmitting parts extending from said power driven member to said plow for effecting vertical adjustment of the plow, a train of motion transmitting parts extending from said power driven member to said elevator for effecting vertical adjustment of the elevator, self-locking mechanism interposed in one of said trains of motion transmitting parts for automatically maintaining the adjustments which are established through that train of parts, and control means for selectively controlling the transmission of motion from said power driven member through either of said trains of motion transmitting parts.

16. In an elevating grader, the combination of a wheel supported frame, a grading plow carried by said frame, an elevator carried by said frame for loading the soil broken up by said plow, a power driven member on said frame operative to transmit power independently of the motion of said grader, a train of motion transmitting parts trains of motion transmitting parts but only op-' erable to effect such transmission of motion through one of said trains at a time.

17. In an elevating grader, the combination of a wheel supported frame, a grading plow carried by said frame, an elevator carried by said frame for loading the soil broken up by said plow, said elevator comprising a conveyor, a power driven member on said frame operative to transmit power independently of the motion of the grader, a first train of motion transmitting parts extending from said power driven member to said conveyor for driving the latter, a second train of motion transmitting parts extending from said power driven member to said plow for effecting vertical adjustment of the plow, a third train of motion transmitting parts extending from said power driven member to said elevator for effecting vertical adjustment of the elevator, and reversing mechanism for transmitting either direction of motion through either one of two of said trains of motion transmitting parts.

JAMES B. GREEN. JOHN M. RATHMELL.

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