US2195306A - Grading machine - Google Patents

Description

March 26, 1940. A. R. HENRY ET Al. m2195306 l GRADING MACHINE Filed Dec. 16, 1938 2 Sheets-Sheet 1 INVENTORS.

Md@ m ATTORNEY.

March 26, 1940. A, R, HENRY E1- AL 2,195,306

GRADING MACHINE Filed Dec. 16. 1938 2 Sheets-Sheet 2 Patented lVIar.` 26.,.'1'940 f GRADING y j Alberta.

IvIenry,l Salina, Kans. and Marion v A Wills,vv Kansas City, Mo.

Application'December16, 1938, Serial7Nb."246-146- y '"2 claims." (orari- 156) o l @ur invention relatestoimprovementsin'grad-r Similar characters'ofreference designate simiinnr machines of a type inwvvhiclriv1 afdra-'W' bar, oscillatively co-nnected'to a traveling frame, 10- ita-tivelyy 'su-pportsa circlewhich carries a scraper.

One ofthe objects of our inventionistheproi vision of novel means for'rotating-thecircle vvnicl'r4 means issirnpleg cheap to 'install and in .f

upkeep, Whichlis-strong', andgnot 'likelyto get out oi" order, which is'easily operated vand enables the employment of a mini-inumvofipow'er for a maxirnuin ofl power effect', andlwhich is Iefcient in its operation.

The novel features ofv lourinvention are here.

in end elevation, partly in' vertical section;v and partly broken away:

' Fig. 4 is a side elevation, partly broken away` of 'what is shown in Fig.- 2; Y

Fig- 5 is anv enlarged transverse Vertical sectional view` of the d'ravvbar, the circle and Y ad- `jacent parte, some parts beingI shown in eleva- Figj' is a planl View off thef'draw bar and circle-associatedwith amo'diedrforfmof our invention', in which them-eter is providedlwith a drivingimember having-peripheral gearteeth engaging with' peripheral teeth'on'the circle, parts of the apparatus beingbroken away.

Fig. f? is a sideelevation', partlyfbroken ayvayfof Y what is shown in Fig. 6. i

Fig. 8 is a plan'view of the draw,l bar and` circle 'associated withv a modification off ol-ir'y improvernent'in which the motor has adrving'member provided Witl'i-sprocket teeth 'engaging asprocket chain which formsk ani integral/peripheral part; of thev circle, parts ofthe hydraulic circuit being omitted, and partly loroken away..

Fig. 9-is a side elevation, partly: broken away; of what is shown in Fig..8. f j Fig; lis a'r diagrammatic viewof. the hydraulic circuit Whichfinciudes the circle operating motor.

Fig.v 'il is'. an,eniargedflongitudinal sectional View of the by pass 'valve and partsconnected lar parts inthe diierent views; g

f l designates a traveling frame of usual con# struction carrying'a cab'- 2,` and supported upon vcarryingwheels 3. f

' 4f' designates v4afusual form-of draw bar the' for"- vframe l", whereby the draw baris 'oscillativela-terally and vertically y o 8 designates the usual circle centrally pivoted by a bolt 9 to a cross bar Hlof the draw bar" so l under'side'mof 'the'A barjiemandV engaging the under side'ofanA annulart'op flange 'of 'tire circle 8.

For' rotatably adj listing-the circle -lion the draw bar 4'; so'l a'sto laterally swingfthe scraper [Loin tlieorm of our inventionsli'ownfin Figsf lrto 5,`

disposedi circumferentiallyu on th'eperiphery" of the circle' 8-t and in* driving engagement 'WitnI a The piston I7 has its' periphery closely vadjacentlifo the circular wall' of? the chamber' 2`I at a vpoint` midway betweentheports i9 and 2U;

The piston il isprovidedwithradial recesses ziinwhicnlare respectively` slidably fitted blades .23, f which: are normally forced outwardly,` so asl ltoyhave traveling; engagement with the circular lWall of the.. chamber 2l, bycoil springs- 2li/respectively mountedin the recesses 22- and bearing atthBir inner' endsfagainst the piston Il, and

hearingA at their outer endsagainst the inner ends respectively o-.tloe1 ola-clesy 23, Fig'. 3. Whenliquid under.I pressure isf forced.- intoftlie 'chamberi 2q! throughthefportd 9; Fig: 3., the. liquid; l suchfasoilrwill.-engage successively: the blades-23 zand., effect.v revolution counterclockwise ofI the pistonll andithedrivinashaft Itas. viewed in 'ast'o beada-pted forrotat'able adjustment onthe chamber' 2 l` Within I Which-fthe 'pistoni Fl is! eccenw trically y rotatably mounted andy adapted '.for roe tatiorrin opposite directions: f

Fig. 3. The oil will pass from the chamber through the port 29. When thel oil is forced into the chamber 2 through the port 29, the piston I1 will be re volved with the shaft I6 in a clockwise direction, as viewed in Fig. 3, and the oil will pass out through the port I 9.

As the shaft I6 and its worm I5 are rotated, the worm I will have traveling driving engagement with the teeth I4, thereby rotating the circle 8 andwith it the scraper II.` Reversing the rotation of the shaft I9 will effect reversal of rotac tion of the circle 8.

'Ihe under side of the draw bar 4 has rigidlyv attached to it a bracket 25 which supports the casing I8 of the motor andserves as, bearing l rmeans for the shaft I3 outside the casing 'I8.

In the form of our inventionshown in Figs. 6

and 7, the constructioncorresponds toz that shown in Figs. 1` to 5, with the following exceptions-and diierences. `The casing I8 is mounted on a horizontal plate 23 secured rigidly to the underside of the draw bar il, with the shaft l5 disposed parallel with the axisrof the circle 8, while in the form shown in`Figs. l to 5, the shaft I8 is transverse to the axis ci the circle. ,A spur gear wheel 21 isrigidlyattached to and revolves with the shaft- IG *and meshes and has traveling engagement withthe teeth I4 of the circle. In operation, whenthe shaft I6 is rotated with the gear wheel 21, thev latter willrotate the circle 8 and` with it the'scraper Il.

In the formof our invention shown in Figs. 8 l

and 9, the construction corresponds to that shown inv Figs. 6 and 7, .excepting that ther shaft I6 is provided with a sprocket wheel 28 which revolves with the shaft It and has traveling yengagement with a sprocketchain 29 the ends of which are rigidly attachedto the periphery of the circle 8 at points circumferentially apart, the vsprocket wheel 29 being `disposed between the chain 29 and the periphery of the circle 8. When the shaft I3 is rotated with the sprocket wheel 28, the

latter will through thechain 29 rotate the circle` type, as shown in the drawings, it forms part Aof an hydraulic circuit whichris sho-wn diagrammatically in Fig. l0. Such circuit comprises the following described parts.

39 which designates a rotary pump of any usual construction, and which may correspond in strucl ture to the motor shown in Fig. 3, has its outlet` 3I communicating with piping 32 connected to an oil tank 33 which may be supported at any desired place on the machine, and which is con.

nected by piping 34 to a port 35 of a controlling valve casing-3B, which may be located in the cab4 2 for convenience of operation therefrom.

The portV I9 of the motor is connected to-a piping 31 which is connected with a port 38 in' the casing 36. The -port 29 of the motor is con-` nected by piping 39 with a port 49 in the casing 3B. The intake' 4I of the pump 39 is connected by piping 42 with a port 43 in the valvev casing 39.

A valve 44 rotatable in the casing 36 is provided at one end with an voperating handle 45. It is provided therethrough with two transverse passages 46 and 41, each of which is adapted to have its ends respectively communicating with any adjacent two ports in the casing while the' other.

passage. has its ends communicating with the other two ports.

With the valve 44 disposed, as shown in solid lines in Fig. 10, the ports 38 and 43 connected by the passage 48, and the passage 41 connecting the ports 35 and 49, the propelling liquidV will pass from the outlet 3| of the pump`39 through the piping. 32 to the supply and pressure tank 33,

4 "thence `through the piping 34, passage 41, piping 39 and port 29 into the motor chamber in the casing I8. The pressure of the liquid` in the -chamber'ZI of lthe motor operating on the blades 23 will revolve the piston I1 and its shaft I6 .clockwise, as viewed in Figs. 3 and 10, thereby effecting revolving of the Worm I5, gear 21 or sprocket wheel 28, as the casemay be, inone direction, and turning the circle 8V and the scraper 4,2 and intake .port 4I into the pump 39, thus completing the cycle. A.

If it is desired to reverse the direction of revolution of the driving shaft i6, the valve 44 is turnedto the position shown in dotted lines in Fig.. 10, in which position the passage 45 will connect with theports 4 9 and 43, and the passage 41 will connect with the ports 35 and 33 of the valve casing 36. c

The liquid. will now pass from the pump 39 through ,thepiping 32,tank 33, piping 34, passage 41,piping31 and port I9 into the motor casing I8, thence to theport'il and throughthe piping 39,pas sage 46 and piping 42 to the intake 4I of the pump 39, effecting, ini-its passage through the motor revolutionv of the piston I1 and driving shaft IB `counterclockwise,` asr viewed in Figs. and 3.

To prevent too high a pressure building up in thecircuit, a by-pass connects the piping 32 and 42, such by-pass comprising `a pipe 48 connected to the piping 32 and communicating with a chamber 49 in avalve casing 59, which has a passage 5l that connects the chamber `49 with a chamber 52, that.in turn communicates with a pipe 53 Vholding the valve 51 in a seat provided at the adjacent end of the passage 5I.

f When the pressure in the piping 32, tank 33, piping 34 and piping 31 or 39 at the time connected vtherewith, k reaches a predetermined amount, thepressure in the chamber 49 will open the valve 51, so that fluid will flow from the piping 32 through the pipe 48, chamber v49, passage l 5 l cliamberSE, pipe 53 and piping 42 to the intake 4l 'of the pump 39, ythus. eliminating liability of damage to thecircuit from too high a pressure causedbyrstoppage or over loading the motor. The pump 39 may belocated at any desired place yon the machineyand the piping connections therewith and with the motor I3, such as the piping 31 and`39, mayy be hoseor other flexible tubing.

With the parts constructed and arranged as shown, when the valve 44 is in the position shown in dotted lines in Fig. 10, and the pump is operated to discharge through the piping 32, the circle 8 will be revolved clockwise in the forms shown in Figs. 2 and 8. In the form shown in Fig. 6, with the valve in the position shownin solid lines in Fig. 10, the circle 8 will be revolved counterclockwise. By setting the valve 44 in the position shown in dotted lines in Fig. 10,*the circle l in Figs. 2 and 8 Will be revolved counterclock- Wise, and the circle 8 in Fig. 6 will be revolved' clockwise.

By setting the valve 44 in neutral, that is with *the passages 46 and' 41 disconnected from the ports 35, 38, and 43, `the motor IB will be disconnected, and will not be revolved in either direction, although the pump 30 is in operation. This Wouldbe the normal position of the valve 44, with the motor inoperative, excepting at such' times as it is desired to shift the scraper II. At such times, the operator sets the valve 44 in the proper position for having the motor I8 revolve the circle 8 to shift the scraper II to the desired position. In each of the three forms of our invention, shown in Figs. 2, '7 and 9,'the driving member, constituting the shaft I6, is connected with the driven means on the periphery of the circle 8 by speed reducing means, as the Worm I5 meshing with the teeth I4 of the circle 8,

M) the desired adjustments ofthe circle and scraper.

-ing from the spirit of our invention.

In making a substantial adjustment of the circle, the driving motor shaft IB will make several continuous rotations in one direction, While the circle turns less than one fourth of a revolution.

Other rrnodiiications within the scope of the appended claims, may be made Without departn What .we claim is: l l,

n l. In a grading machine having a traveling frame, a draw bar attached to and drawn by said frame, a circle rotative in .either direction on said draw bar, and a scraper attached to and revoluble with said circle, in combination with a motor on said draw bar and having a drive shaft and means operated by pressure liquid for rotating said shaft in either direction, liquid supply means for said motor by which pressure `liquid can be caused to operate said shaft rotating means to rotate said shaft in either directionk or hold said shaft from rotation, and speed reducing driving means connecting said drive shaft andsaid circle by which said circle is rotated at a speed less than saidv drive shaft.

2.y In a grading machine having a traveling frame, a draw bar attached to and drawn by said frame, a circle-rotative in yeither direction on said draw bar and provided with a peripheral arcuate roW of gearteeth, and a scraper attached to and revoluble with said circle, in combination with a motor on said draW bar and having a drive shaft provided With a worm operatively engaged with said teeth, and liquid supply means for said motor by which pressure liquid can be caused to operate s'aid drive shaft rotating means to rotate said drive shaft, and through it said circle, in either direction, or hold said drive shaft and circle froml rotation.`

ALBERT R. HENRY'. MARION C. WILLs.

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