US1528906A - Moldboard supporting and adjusting means for road graders - Google Patents

Description

Mafi'ch 10, 1925. 1,528,906

F. E. ARNDT IOLiSBOAiib SUPPORTING AND ADJUSTING mmns FOR ROAD GRADERS Filed March 18, 1924 4 Sheets-Sheet 1 gwwmto c I March 10. 1925. 1,528,906 F; E. ARNDT A MOLDBOARD SUPPORTING AND ADJUSTING MEANS, FOR ROAD GRADERS Filed March 18, 1924 4 Sheets-Sheet 2 March 10, 1925.

F. E. ARNDT MOLDBOARD SUPPORTING AND ADJUSTING MEANS FOR ROAD GRADERS I Gm: wag I Filed March 18, 1 9 24 Z4 4 Sheets-She WIMHHW ii;

March 10, 1925. 1,528,906

F. E. ARNDT I MOLDBOARD SUPPORTING AND ADJUSTING MEANS FOR ROAD GRADERS Filed March 18, 1924 4 Sheets-Sheet 4 'a'. 5 s I w Patented Mar. 10, 1925.

masses 1 UNITED. STATES PATENT oFF cs.

FRANKLIN E.

ARNDT, OF GALION, OHIO, ASSIGNOR' TO THE GALION IRON VJORKS dz 7 MFG. (30., OF GALION, OHIO, A CORPORATION OF OHIO.

MOLDBOARD SUPIPORTING AND ADJUSTING MEANS FOR- ROAD GRADERS.

Application filed March 18, 1924. Serial No. 700,117..

To allwhom it may concern:

Be it known that I, F RANKLIN E. Anna, a citizen of the United States,'residing at Galion, in the county of Crawford and State of Ohio, have invented. certain new and useful Improvements in Moldboard Supporting and Adjusting Means for Road Graders, of which the following is a specification.

This invention relates to road graders, and particularly to graders of that type wherein a mold board with its blade is mounted upon a circle, and wherein means is provided whereby the angle of the mold board to the line of draft may be adjusted.

One object of this invention is to provide an improved means for adjusting the inclination or angle of the mold board relative to the ground, and to provide means which will positively lock the mold board in any adjusted position, which means, however, may be readily shifted into or out of its locking position.

A further object" is to provide a device of thischaracter which is capable of what may be termed a coarse adjustment and a fine adjustment. g

A still further object is to provide means for rotating the circle in a plane parallel to theground, and provide means for positively locking the circle at a plurality of points in any rotatively adjusted position and thus hold the circle from accidental rotation, and

in this connection to provide manually op'-- erable means for readily unlocking thecircle and then rotating it to its adjusted position and thenre-locking it. i

Other objects haveto do. with the details of construction and arrangement of parts as will appear more fully hereinafter.

My invention is illustrated in the accomp anying drawings, wherein Figure 1 is a fragmentary side elevation of a road grader constructed in accordance with my invention;

Figure 2 is a top planview of the portion of the road grader illustrated in Figure 1;

Figure 3 is a top plan view of the circle and allied parts, showing the locking means for the circle, the frame structure mounted above the circle being removed;

Figure 4 is a section on the line 1+4: of Figure 3;

i ureo is a 00 vi i F g V t lan ew of a oit on of the circle and moldboard', showing the lockst'ruction shown in Figure 5;

7 -7 of Figure 6;

plate 48 and Figure 7 is an enlarged section on the line Figure 8 is an under side plan view of the cam 52, the shaft'18 being in section;

Referring to these drawings, and particularly to Figures 1 and 2, it will be seen that I have illustrated so much of a road grader as is pertinent to my present improvements, this consisting of main, longitudinally extending, somewhat divergent frame beams 10, these frame beams being connected at their forward and rear ends and being arched at the middle. The forward ends of the frame beams are op'erativelysupported upon a front axle 11, while the rear ends of the frame beams are operatively supported upon the rear axle, the wheels of which are designated 12. A transverse brace 13 is mounted between the middle of the frame beams and the forward axle 11.

Swingingly mounted upon the forward axle are the rearwardly extending draw bars 14, These operatively support the circle 15, this circle being formed with teeth 16 defining notches between them. The circle is illustrated as operatively supported by brace 17, through which the central vertical shaft 18 passes, this central shaft carrying upon its upper end the beveled gear wheel 19. This transverse brace 17 carries at opposite points the downwardly extending angle iron ears 20. "Below the brace 17 and extending at right angles thereto is a transverse brace 21 which is'preferably of channel iron and which is connected at its ends to upon diametrically opposite points of the circle 15 are the knees 25, the horizontal porand are disposed within the recessed portions 24 thereof. There are a pair of these knees on each side of the circle, as shown particularly in Figure 5,. the knees extendtions of which extend beneath the webs 22 ing downward and slightly forward in a curve, the knees being spaced apart. The knees are held to the webs 22 by means of bolts 26 which extend down between each pair of knees, the lower ends of these bolts carrying clamps 27 and nuts 28 holding these clamps in position and holding the knees from any movement.

To the lower end of each pair of knees is pivotally mounted the mold board 29, this mold board carrying a blade 30 of usual character and being connected to the knees by means of an angle iron 31 having riveted or otherwise attached thereto the upwardly extending ear 32, through which the pivot bolt 33 passes. The upper portion of the mold board 29 carries upon it the ears 34, and pivoted between these ears is the looking bar 35 which, as illustrated in Figure 7, is approximately T-shaped in cross section and passes between the knees 25. This locking bar is toothed upon its upper and relatively wide face, as at 36.

For the purpose of holding the mold board locked in any adjusted position, I detachably and adjustably mount upon each pair of knees 25 the U-shaped yokes 37 which carries at its lower end the transversely extending shaft 38 having mounted thereon the cam 39 having a transverse bar 40 at one end which constitutes astop and handle. The cross bar of the U-shaped yoke member is provided at its ends with apertures 41 for the passage of the arms of a U-shaped clamping bolt 42 carrying nuts 43. This clamping bolt embraces both of the knees 25. The cross bar of the Ushaped yoke 37 is provided with a downwardly extending lug in the form of a tooth and designated 44 which is adapted to engage in any one of the teeth 36.

It will be obvious now, particularly from Figures 6 and 7, that when the cam 39 is turned to the position shown in Figure (5, the locking bar 35 will be forced upward and the tooth 44 will be engaged between two of the teeth on the locking bar and thus the bar 35 will be held from any longitudinal movement and the mold board will be held in adjusted position. hen it is desired to adjust the locking bar, however, the cam is forced in the direction of the arrow in Figure 6 to the dotted line position in this figure, which depresses the highest portion of the cam, and this permits the locking bar 35 to descend an amount suflicient to detach it from its engagement with the tooth 44 and thus permit the mold board to be adjusted. When the mold board is adjusted the cam is turned in the reverse direction to the arrow shown in Figure 6 until the handle 40 which constitutes a stop bears against the two legs of the U-shaped lug 37 and the cam is then in position to hold and lock the bar 35 in engagement with the tooth 44. It will be seen that the bar 35 is disposed between the two knees. Therefore, it is amply supported against-lateral thrust. Inasmuch as the cam is mounted upon the yoke 37, which in turn is held to the knees by means of the U-shaped bolt 42, it follows that this yoke 37 may be adjusted along the knees to any desired point and then the mold board be shifted inward or outward by hand to change its angle with relation to the ground and then the cam 39 turned so as to carry the bar 35 up into its engagement with the locking tooth 44 and lock the mold board in adjusted position. Inasmuch as the locking devices are independent of each other, it follows that one may be slightly differently adjusted than the other. It will be seen from Figure 2 that the knees are curved at their forward ends concentrically to the curvature of the circle 15 and this curvature, of course, inaterially assists in aiding the bolts 26 to hold the knees against longitudinal movement under the strain to which the mold board is subjected.

For the purpose of holding the circle 15 in any of its rotated positions, I provide, as illustrated best in Figures 3 and 4, the locking bolts 45 which are mounted imme diately beneath the annular portion 46 of the frame, these locking bolts having shanks 47 which extend inward and pass through the lugs 20, each shank 47 having at its end the yoke 48, this yoke being longitudinally slotted, as at 49. Each yoke at its point of connection to the shank is formed with an angularly bent shoulder or flange 50, and disposed between the bolt 45 and the corresponding guide lug 20 are the coiled compression springs 51. Each yoke 48 at its end opposite its point of connection to the shank 47 is angularly bent so as to form a flange 52 extending transversely of the length of the yoke. The shaft 18 passes through the aligned slots 49 of the yoke and through the cross piece 21, as previously described.

Mounted upon the shaft 18 is the elliptical cam 53 which operates against the transverse shoulders or flanges 52. Thus when the cam is in the position shown in Figure 3, the springs 51 act to pull the shanks 47 outward so as to thrust the bolts 45 into the notches between the teeth of the circle and thus lock the circle from any rotation. When, however, the cam 53 is turned to the dotted line position in Figure 3, the cam will act to draw the yokes toward each other and thus draw the bolts out of the notches between the teeth and the circle may then be adjusted. It is to be noted from Figure 8 that each flange 52 is formed at its middle with a slight depression 54 within which the-nose of the cam engages when the cam is in the position shown in dotted lines in Figure 3, so that thusthecam is locked against accidental rotation without force being applied to the cam to rotate it.

For the purpose of rotating the ei-rcleand thus rotatingzthe moldboard to any desired angular position relative to;the line of draft, I provide the circle with theLbe-veledgear wheel or toothed annulus155. Coacting with this toothed annulus '55 is a beveled gear Wl16l56, which is an idlegear wheel, and is mounted in a'bracket .57 carried upon the transverse brace 21. Coac'ting'with this idlebeveled gear wheel 56 is a beveled gear wheel 59 mounted'in a brace 58. T-shaped in cross section, which extends, between the draw bars 14. This beveled gear wheel 59 is mounted on a shaft. 60. Coacting with the shaft 60 is a tubular sliaftsection 61 which has a universal joint.c,onnection with the shaftsection 60, as at 62.

C'oacting with this tubular shaft section 61 is a shaft section 63 which has splined engagement with the shaft section;6land extends upward and forward and has anniversal joint connection at 64. with awsl'iaft 65 mounted in bearings 66 and carrying upon it the pinion origear wheel 67. These bearings 66 are mounted upon a plate 68 carried bythe forward end of thesupporting frame. Likewise mounted in;bearings 69 upon this plate'is a-longitudinally shiftable shaft 70 carrying upon it a; gear wheel 71. This shaft 7 0 is shiftable longitudinally within itsbearings and atitsrear .end has a universal joint connection 72 tOilrSllCltllllQ shaft section '73, in turn having auniversal joint connection 74 to ,a relatively long shaft section ,75 extending rearward and operatively mounted,-asshown in Figure 1,-up0n one ofthe frame beams 10 and provided with a handle .7 6 whereby the shaft may be longitudinally shifted or rotated.

Rotatably mounted in bearings 77 on the 2 plate 68 is a shaft section 78 carrying a gear wheel 79, this .shaft'section 78 being connected by a universal .joint. connection to .a shaftsection 80 which extends rearwardand has splined slidingengagement with a telescopic shaft section 81, the rear end of which has a universal jointconnection at 82 to a shaft section 83 mounted in suitable bearings and carrying at its rear :end a beveled gear wheel 84 which engages with the'bew eled gear wheel 19 carriedon theshaft 18,

this shaft 18 being theshaftwhiehcarries the cam 53 whereby the yokes 48and t-h locking bolts 45 are-shifted. I

The shaft 75 constitutes a manually operable :shaft, as will be noted, and may be longitudinally shifted or rotated. Normally the gear wheel71 is disposed between and out of mesh with either the gear wheel 67 or the gear wheel 7 9. When, however, the shaft 75 "is drawn rearward, it shifts the pinion 71 into engagement with 'the gear desired adjusted position. board hasbeen shifted to this position, the r shaft 75 is again retracted and engaged .wheel 79. Then by a rotation of the shaft 75, the elliptical cam 53 will be rotated to the dotted line position in Figure 3, which will retract the lockiiig5bolts a5 and hold them retracted byireason of the extremities of the cam 53 engaging in the depressions in theflanges 52. If now the shaft'75 be shifted forward so as to carry its gear wheel 71 into engagement with theigear wheel;67, it is obvious that a rotation of the shaft T5rwill cause the rotation of the pinions 59 and 56, thus through-the gear wheel 55 rotating the circle and carrying the moldl'ioard to any After the mold with the gear wheel 71 and rotated so as to carry the cam 53 from its dotted line position to its .full line position in Figure 3, which permitsthe springs 51 to then project the'bolts 15 into engagement with the teeth 16 on the circle 15. It will thus be seen that the mold board may beadjusted to any desired position and locked in thisadjusted position. It will also be noted that-when the locking bolts are withdrawn from engagement withthe circle that they are held withdrawnby reason of the extremities of the camresting in the notches or depressions in the transverseflanges 51.

I do not wish to be limited to any pan ticular means for supporting the circle, as

variousmeans such as commonly employed for this purpose may be used, but I have villustratedthe circle as supported at three points, the channel iron bracel'? at its forwa rdend carrying a casting 85 acting as a guide for the bolt and being recessed at its gives complete command over the position of the mold board to the operator of the scraper who stands on a platform at the rear endtliereof and permits the unlocking of 'the'circle carrying the mold board and itsad ustineiit iiieither tlllGClSlOlltIIld to any extent required whilethe machine is operating and then permits the relOcking of the mold board in the desired position. The construction illustrated in detail in Figure 6 permitsthe ready adjustment of the mold board into any desired angular relation to the ground and permits the firm locking of the mold board in this adjusted position, this locking strain being resisted by the outer end to receive the teeth 16,the brace knees themselves by reason of the fact that the locking device is bolted by the U-bolts 42 to the knees.

\Vhile I have illustrated certain details of construction and arrangement of parts, I do not wish to be limited to this, as it is obvious that'many changes might be made in these details without departing from the spirit of the invention as defined in the appended claims.

I claim z- 1. A road grader including a supporting frame, a circle operatively mounted thereon for rotation around a central axis, amold board carried upon the circle and oscillating therewith, a locking device mounted upon the supporting frame and held from rotation and normally engaging the circle. and holding it from rotation, and a single means mounted on the supporting frame whereby the locking device may be unlocked and the circle rotated in either direction.

2. In a road grader, a supporting frame, a circle operatively mounted thereon for rotation around a central axis, the circle having locking notches facing toward the center of the circle, a radially disposed bolt held from oscillation with the circle and spring projected toward the notches of the circle, and manually operable means for retracting the bolt and oscillating the circle.

In a road grader, a supporting frame, a circle operatively mounted thereon for rotation around a central axis, the circle having locking notches, diametrically disposed bolts carried by the frame and held from rotation with the circle and springprojected into notches in said circle, manually operable means for simultaneously retracting said bolts including a shaft coincident with the axis of said circle and mounted upon said supporting frame, a double cam mounted upon the shaft and operatively en aging with the bolts to retract them when the cam is turned in one direction, and manually operable means mounted upon the supporting frame for rotating said cam.

:t. In a road grader, a supporting frame, a circle operatively mounted thereon for rotation around a central axis, the circle having locking notches. diametrically disposed bolts mounted on the supporting frame and spring-projected into notches in said circle, slotted yokes on the inner ends of said bolts, the yokes overlapping and the slots coinciding, a shaft supported by the frame and passing downward through said slots and constituting an axial center around which the circle turns, a cam mounted on the shaft and adapted to engage said yolres to retract the bolts when the cam is turned in one direction and permit the projection of the bolts when the cam is turned in the other direction, and manually operable means for operating said cam mounted upon the rear end of the supporting frame.

5. In a road grader, a supporting frame, a circle operatively mounted thereon for rotation around a central axis, the circle having locking notches, diametrically disposed bolts carried by the supporting frame and spring-projected into notches in said circle, slotted yokes on the inner ends of said bolts, the yokes overlapping and the slots coinciding, a shaft carried by the supporting frame and passing downward through said slots and constituting an axial center around which the circle turns, a cam mounted on the shaft and adapted to engage said yokes to retract the bolts when the cam is turned in one direction and permit the projection of the bolts when the cam is turned in the other direction, and means for rotating said circle comprising a gear wheel operatively engaging the circle to rotate it, and a single manually operable means for operating said cam and said gear wheel and shiftable into operative engagement with either said gear wheel or said cam and including a manually operable member mounted at the rear end of the supporting frame.

6. A road grader including a supporting frame, a circle operatively mounted thereon for rotation around a central axis, means for locking the circle in any rotated position, a gear wheel carried by the circle, means for releasing said locking means including a central shaft having a beveled gear wheel, a shaft having a beveled wheel engaging the last namel beveled gear wheel and carrying upon it a pinion, a beveled gear wheel engaging the beveled gear wheel on the circle, a shaft carrying the last named beveled gear wheel and having on it a pinion, a longitudinally shiftable shaft carrying 011 it a pinionadapted to be shifted into engagement with one or the other of said pinions, and manually operable means at the rear end of the frame whereby said last named pinion may be shifted longitudinally or rotated.

7 A road grader including a supporting frame, draft bars pivotally mounted thereon and extending rearward from the forward end of the frame, a circle operatively mounted upon the draft bars for rotation around a central point, a vertical shaft disposed at the axis of said circle and carrying a beveled gear wheel, said circle having beveled gear teeth and having interi-orly projecting locking teeth, a pair of slotted yokcs through which the shaft passes, said yolres overlapping each other and having flanges at their inner ends, a cam mounted upon said shaft and coacting with said flanges whereby, when the cam is rotated in one direction, the yokes will be drawn toward each other and when rotated in the other direction the yokes will be permitted to move outward,

springsurging the'outward movement of the yokes, locking bolts operatively carried by said yokes and engaging between the teeth ofthe circle, beveled gear wheels operatively engaging the gear wheel on the shaft and the beveled gear teeth on the circle, and manually operable means mounted upon the supporting frame whereby the gear wheel may be rotated to thereby rotate the shaft and cam or whereby the gear wheel engaged with the circle may be rotated to thereby adjust the circle.

8. A road grader including a wheeled supporting frame, draft bars pivotally connected to the forward end of the frame and extending rearward and downward therefrom, a transverse member mounted upon the draft bars, a central shaft carried by the transverse member and extending below it, a circle operatively supported upon the draft bars for rotation. around said shaft, said circle having a series of inwardly projecting locking teeth and havingmeans for supporting a mold board, a beveled gear wheel loosely mounted upon the shaft and operatively connected to the circle, locking means normally engaged withtheteeth on the circle but retractible from engagement therewith, means actuated by said central shaft for retracting said lockingmeans, a beveled gear wheel operatively engagingthe beveled gear wheel carried by :the circle, means for operating thefirst named shaft to cause the unlocking or locking of the circle and for operating said lastnamed gear wheel to rotate the circle comprising a shaft section having a pinion thereon, a series of shaft sections flexibly connected to each other and transmitting motion from said last named shaft section to the beveled gear wheel operating the circle, a shaft section having a pinion thereon, a'series of flexibly connected shaft sections connecting said last named shaft section with the central lock operating shaft, means for driving said pinions comprising a longitudinally movable shaft having a pinion thereon, the shaft being shiftable to engage its pinion with either of the first named pinions, a series of flexibly connected shaft sections connected to said longitudinally shiftable shaft and extending rearward therefrom, and a. manually operable means mounted upon the rear end of the rearmost shaft section.

9. In a road grader, a circle, knees connected thereto and extending downward and rearward therefrom and adapted to support a mold board, the circle being provided with outwardly projecting webs formed with recesses on their under faces within which the knees are received, and bolts passing through said webs and having clamping members engaging said knees and clamping the knees between the webs and said clamping members.

10.. In airoadgrader, a circle, a pair of knees adapted to support a mold board, the knees each being composed of a pairof members,;the circle being provided with outwardly projecting webs recessed upon their under faces to receive each a:pair ofsaid members, bolts passing through the webs and between said members, and clamps carried by the lower ends of the bolts and engaging against the under faces of said members.

11. In a road grader, a circle, a-pair of knees adapted to support a moldboard, the knees eachbeing composed of a pair of members, the circle being provided with outwardly projecting webs recessed upon their under faces to receive each a pair of said members, bolts passing through the websand between said members, and clamps carried by the lower ends of the bolts and engaging against the under faces of said members, the forwardends of said knees being curved to conform to the curvature of the circle.

12. In a road grader, a pair of knees, a mold boardhingedly connectedzto the lower ends of the knees, .means for holding the mold board in angularly 'adjustedpositions relative to the surface of the ground includingzlocking bars' pivoted to the .mold board and extending rearwardtherefrom and past said knees, a locking membernlounted upon each knee. and coacting with the first named locking member, each of said'members being toothed, andmeans for shifting thelocking bar into engagement with the first locking member and holding it in its engaged position.

13. In a road grader, a pair of knees, a mold board hingedly connected to'thelower ends of the knees, fmeans for holding the mold board in angularly adjusted positions relative to the surface of the ground'including locking bars pivoted'to the mold board and extending rearward therefrom and past said knees,,a'lockingmember mounted upon each knee and coacting with the first named looking member, eachof said members being toothed, and means for shifting the locking bar into'engagement with the-first locking member and holding it in this engaged position, comprising a cam operatively supported upon the knee and in another position permitting the locking bar to shift away from the locking member and in the other position holding the locking bar in engagement with the locking member.

14. In a road grader of the character described, a knee, a mold board pivotally connected adjacent its lower edge to the knee, and means for oaeratively engaging said knee and adjustable to hold the mold board in any one of a plurality of positions angular to the face of the road.

15. In a road grader, a knee comprising two parallel members, a mold board pivot- T adapted to engage, a cam operatively supported upon the knee and having its peripheral face engageable with the locking bar, said cam being rotatable to a position to release the locking bar from engagement with the locking member or into position to engage the locking bar with the locking member.

16. In a road grader, a knee comprising two parallel members, a mold board pivotally connected adjacent its lower edge to the lower end of the knee, a locking bar pivoted to the mold board and extending between said members and having teeth on its upper face, a yoke mounted upon the knee and formed to provide a locking member confronting the teeth on said bar; a cam rotatably mounted in this yoke and having a. peripheral bearing against the lower edge of the locking bar, the cam being rotatable to thereby cause the locking bar to move into locking engagement with the tooth on the yoke or out of locking engagement therewith.

17. In a road grader, a curved knee, a mold board pivotally connected to the lower end of the knee, a locking bar pivotally connected to the lower portion of the mold board and extending rearward therefrom and past said knee, a U-shaped yoke disposed against the rear edge face of the knee, means for adjustably clamping said yoke upon the knee, the locking bar passbar and having an edge bearing against the under face of the locking bar, said cam when rotated in one direction shifting the locking bar into engagement with the tooth on the yoke and when shifted in the other direction permitting the locking bar to lower away from said tooth.

18. In a road grader, a curved knee, a mold board pivotally connected to the lower end of the knee, a locking bar pivotally connected to the lower portion of the mold board and extending rearward therefrom and past said knee, a U-shaped yoke disposed against the rear edge face of the knee, means for adjustably clamping said yoke upon the knee, the locking bar passing between the legs of the yoke and the yoke being formed with a tooth confronting the teeth on the locking bar, and a cam mounted upon the lower end of the locking bar and having an edge bearing against the under face of the locking bar, said cam when rotated in one direction shifting the locking bar into engagement with the tooth on the yoke and when shifted in the other direction permitting the locking bar to lower away from said tooth, the cam having a stop adapted to bear against the legs of the yoke and limiting the movement of the cam in opposite directions.

19. In a road grader, a knee composed of two spaced parallel members, a mold board pivotally connected to the lower end of the knee, a locking bar pivotally connected to the upper portion of said mold board and extending between said members and the knee having its upper face toothed, a U shaped yoke disposed against the rear edge of the knee and having a locking tooth, a U-shaped clamping bolt passing around both the members and through the upper end of said yoke, the locking bar passing between the legs of the yoke, and a cam rotatably mounted between the lower ends of the legs of the yoke and having an edge bearing against the lower edge of said locking bar, said cam when rotated in one direction shifting the locking bar into engagementwith said locking member on the yoke and in the other direction releasing said locking bar.

In testimony whereof I aiiix my signature.

FRANKLIN n. ARNDT.

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