US2243564A - Road grader - Google Patents

Description

May 27, 1941. J. H. KERBER ROAD. @BADER Filed Dec. 2o, 1940V 5 Sheets-Sheet l '/INVENTOR BY l ATTORNEY May 27, E941. .L1-i. KERBER ROAD GRADER Filed Dec. 20, 1940 5 Sheets-Sheet 2 INVENToR A 'K Wf/(MW 'BY .A

'j ATTORNEY ay- 2'?, NM..

J. H. KERBER ROAD GRADER Filed DB6. 20, 1940 3 Shets-Sheei 5 mm M @w M m Nw I m I @mi w@ .1., ...M .W s P .W r 1.---11 -:T: La m wm mm mm u f Vzh... 5/ lll il wv J Q mm. .N.\ I om om mm m um mm mw o l wm um .mm n jf 1 uit t ,/,l la-.. 7 l S w m om ...l I mm O d r MW mm M 1| n Nm mm Nq 1| Patented May 27, 1941 UNITED STATES` PATENT OFFICE (Cl.l 37-159) 5 Claims.

The invention relates to road graders.

The general object of the invention is to provide a road-treating blade attachment that may be readily applied to an industrial truck, so that such truck can be used for road patrol work and provide the motive power for operating the scraper blade, and thus save the expense of a special tractor grader. More particularly, the invention is designed to simplify and improve the road grader shown and described in my co-pending application Serial No. 272,491, filed May 8, 1939, for Truck grader, and in this connection the mounting of the blade from the truck frame has been simplified, and the height of the blade is directly controlled by a pair of independently operable hydraulic cylinders which may be directly connected to the blade or indirectly through shoes having a lever connection with the blade.

The invention further consists in the several features hereinafter set forth and more particularly defined by claims at the conclusion hereof.

In the drawings:

Fig` 1 is a side elevation View of a grader structure embodying the invention;

Fig. 2 is a plan view of the improved grader structure, parts being broken away and parts being shown in section;

Fig 3 is a detailed sectional View taken on the line 3 3 of Fig. 2;

Fig. 4 is a detailed sectional view taken on the broken line 4--4 of Fig. 3;

Fig. 5 is a diagrammatic View of parallel mold board adjustments;

Fig. 6 is a view similar to Fig. 5 showing angular mold board adjustments.

Referring to the drawings, I have shown the device embodying the invention applied to a motor driven truck 8 of conventional form and having a dump body 9 and provided with an hydraulic pump I furnishing hydraulicV fluid from a supply tank I0' and under suitable pressure to a system' including a control valve mechanism Il mounted adjacent the truck operators seat I2, so that the operating handles I2 for said valve mechanism are within easy reach of the driver of the vehicle.

The scraper blade or mold board I3 is connected to a carrying frame I4 which at its center is connected through a ball and socket swivel joint I to an angular push frame I6, the legs of which at their base end are each, respectively, pivotally connected at I'I to a bracket I8 which is clamped by U-bolts I9 to the rear axle housing of the truck at a point outside the side frames gof said plates.

2| of said truck. vThe blade is vertically angularly adjustablymounted on the frame I4 by ears 22 at its lower part connected to said member by pins 23 `and by ears 24 at its upper part connected by bolts 25 to links 26 which in turn are adjustably connected to the frame I4 by brackets 27 which at their upper ends are pivotally connected by bolts 28 that are adapted to engage in any one of a series of holes 29 in the links 26, the blade being shown in uil in Fig. 4 in one angular position and being shown in dotted in said gure in another position. The frame is hung from the truck frame as hereinafter described.

Transversely extending frame members 33 are secured in spaced relation to the side bars 2| of the truck by U-bolts 3l. Vertically disposed angled brackets 32 are secured by bolts 32 to the front faces of the side bars adjacent the ends ofy the frame members 30 and are provided with a plurality of vertically spaced holes, one of which is adapted to take one of the bolts 33 which also passes through the extended end of the member 30. Arcuate supporting members 34 arer vertically adjustably connected to the brackets 32 by bracket parts 35 adjustably connected to the brackets 3-2 by the bolts 33 adapted for insertion in holes 36 in said bracket parts and selected holes in the brackets 32, one of the bolts 33 as noted above also extending through a hole in the frame member 30. The members 34 are on a radius which forms a turntable mounting for the blade.

Hoist cylinder and guide mounting brackets 3l are adjustably guided on the .arcuate members 34 by arcuately grooved plates 38 clamped to said Ybrackets 31 by bolts 39 and a series of shims 33 which are individually removable for the purpose of taking up wear of grooved portions Thus the brackets 3l are free to slide along the turntable parts 34, and they have a guide bar 49 extending vertically through them, and their 'arms 42 carry a pivot pin 42 which passes through a pivot boss formed on the top of the hoist cylinder 43. Each guide bar 4I) is pivotally connected at its lower end to the framel I4 so as to permit said frame and mold board to swing in a vertical plane thereto by a pivot pin 44 mounted in spaced ears 45 on the frame I4, said pin being removably held in said ears by a removable cotter pin 46.

Elach hoist cylinder 43 is a double acting type cylinder with the piston 4l'V working therein having a rod 48 working through the usual -stuiiing box (not shown) in the lower end of said cylinder, the lower outer end of said rod being operatively connected by a pivot pin 49 to one end of a lever 50 which is pivotally mounted intermediate its ends on pivot pin 5I carried by a boss 52 on the frame I4. The lever 50 is formed by a pair of spaced members which straddle the rod 48 and the boss 52 but are connected together at their other end to provide a laterally extending apertured -portion .53 through which a threaded stud 54 vloosely passes, said stud being secured in different positions of vertical adjustment relative to the lever 55 by nuts 55 vertically adjustably mounted onfsaid stud. The stud is vertically pivotally connected at its lower end 56 to a metal shoe i51 'which is provided with vertically mounted guide pins I'58 that are loosely mounted in guide bosses 59 in the frame I4.

With the above construction naising of the piston 41 by hydraulic fluid introduced into the cylinder 43 on the lower side thereof causes it 1to Yswing the inner end of the lever 50 connected Fig. 5, or Vone end of the blade may be lowered while the other is raised as shown diagrammati- `cally in Fig. 6. From the above it will be noted that the shoes 51 act as depth gauges for the blade. Where the gauging action of the shoes 51- is not desired, they may be held in an inoperative position by locking pins 60 that are inserted through holes 6I in the levers 50 and an aligned hole in bosses` 62 on the frame I4.

It will be noted that the loose connections between the frame I4 and the shoes 51 and the pivotal connectio-ns of the guide bars 40 With the frame I4 and the pivotalv connections of the cylinders 43 permit-l inclination of one end of the mold board I3 relative to the-other.

so as to allow the brackets 31 and plates 38 to turn freely relative to the turntable mounted on the truck frame.

It will be noted from Fig. 2 that the shoes 51 are located immediately back of the mold board I3 and extend lengthwise thereof and have rela.- tively flat bottoms adapted to slide along the top of the roadway.

I desire it to be understood that -this invention is not to be lirnited'to any particular form or arrangement of parts except in so far as such limitations are included in the claims.

What I claim as my invention is: 1. The combination with a motor driven ve- :hicle provided with a turntable, of a scraper blade,-means for hanging said scraper blade from -saidvehicle for vertical and horizontal angular movement -relative thereto including hydraulic hoist cylinders mounted for angular movement onvdiametrically opposite sides of said turntable and provided with pistons, levers pivot-allycarried by `said scraper blade intermediate their ends andoperatively connected at one end to saidpistons, and` road engaging shoesoperative- 1y connected to ythe other `end of said levers whereby vertical .adjustment of said pistons will act on the .shoes to vary the vertical .position of .said blade relative to the roadway.

`2. .The combination with a motor driven .vehicle provided with a turntable, of a scraper blade, means for hanging said scraper blade from said vehicle for vertical and horizontal angular For swinging the mold board angularly in a 50 -lgenerally horizontal plane about its pivot nI5, .an hydraulic cylinder 63 carried by the frame I6 and pivotally connected at-64 thereto has a piston 65 working in said cylinder with its rod .56 working through a stuffing box .in said cylinder and pivotally connected .to thefframe I4 by a vertically disposed pivot pin 51. With this .construction introduction of hydraulic iluid into .the head end of the cylinder and relief of fluid from the other end causes the mold board to 60 Vbe swung from its dotted toy the full line position shown in Fig. 2, and of course, by checking the flow of fluid the piston- E5 may bestopped inany intermediate position so as to .vary the .angular position of the mold board to any. position Within the two extremes shown, and reversal of the vposition of said blade from itsfull to dottedline position is alected by the introduction of hydraulic iluid at the back of the piston 65 and relief of hydraulic uid from the fron-t end of movement relative thereto .including hydraulic vhoist cylinders mounted for angular movement on diametrically opposite sides of said turntable and provided with .pistonslevers pivotally carried by said scraper blade` intermediatetheir ends and operatively connectedat one end to said pistons, road engaging shoes .operatively connected to the other end .of saidlevers whereby vertical adjustment of said pistons will act on the shoes to vary the vertical vposition of said blade relative to the roadway, and manually .openated means for locking said leversV to said blade with the shoes in Ya retracted position.

3. The combination with a motor driven .vehicle vprovided with a turntable, of a scraper brade, brackets slidably mounted relative to said turntable and adapted to beV clamped thereto in different positions of angular adjustmentrelative to the line of draft of the vehicle, hydraulic hoist cylinders pivotally carried by said brackets and having pistons voperatively .connected tosaid blade to control the vertical ,adjustmentthereo and guide means also Aextending between V.said blade and brackets and vertically, slidably mounted in the latter.

4. The combination witha motordriven vehicle provided with a turntable, .of .a scraper blade, brackets slidably mounted relative to -said turntable `andadapted .tombe clamped thereto in 'different `positions of angular .adjustment reliative to theline .of draft of .the vehicle, hydraulic hoistI cylinderspivotally carriedV by said. brackets andA having pistons, road-engagingA Shoes, .levers carried by said bladeA and operatively connect- .ametrically-disposedibrackets having clamping plates slidably mountedpn said rails and clamping bolts for said platesiifor securing said brackets in the desired radial angle position relative to said turntable, a grader blade, an hydraulic hoist cylinder pivo-tally-hung from each bracket and hlaving a. piston operatively connected to said blade to control the vertical adjustment thereof, guide bars pivotally connected to said blade and vertically slidably mounted in said brackets, a push frame operatively connected to l0 JOSEPH H. KERBER.

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