US1929548A - Snowplow attachment for motor trucks - Google Patents

Description

Oct. 10, 1933. c, H FRWK 1,929,548

SNOWPLOW ATTACHMENT FOR MOTOR TRUCKS Filed Oct. 20, 1930 '3 Sheets-Sheet l //v v:- 11 T0 2 6 ,M WI /V566 Oct. 10, 1933. H FRIN 1,929,548

SNOWPLOW ATTACHMENT FOR MOTOR TRUCKS Filed Oct; 20, 1930 3 Sheets-Sheet 2 Oct. 0, 1933- c. H. FRINK 1,929,548

SNOWPLOW ATTACHMENT FOR MOTOR TRUCKS Filed Oct. 20, 1930 3 Sheets-Sheet 3 vsnrox Patented Oct. 10, 1933 sNOwPLOW ATTACHMENT FOR MOTOR TRUCKS Carl H. ,Frink, Clayton, N. Y.

Application October 20, 1990. Serial N0.-489,983

1 Claim.

,This invention relates'to a snow-plow attachment for motor trucks of the class set forth in my Patent No. 1,589,748, isued June 22, 1926, in thatit comprises a main frame having re- 5 leasable'means for rigidly securing it to the front end of the truck to extend forwardly therefrom, and a supplemental plow-supporting frame adjustably suspended from the main frame for vertical movement relatively thereto.

The main object is to increase the efficiency and durability of an apparatus of this character so that it may be driven at a higher speed over country and city roads than has heretofore been practiced and thereby to maintain the roads in a passable condition, at all times, free from snow and ice, at a greatly reduced cost.

One of the specific objects is to bring the entire attachment into sufficiently'close relation to the front end of the. truck frame to prevent excessive. vibration of its various parts and at the same time to cause therear ends of the mouldboards of the plow to extend some distance beyond and at opposite sides of thefront end of the-truck-frame for increased strength 25 durability and efliciency, and for shorter turnins diu Another specific object is converge the moldboards, forwardly at equal angles to the longitudinal center of the truck so as to meet in the speed to assure thejdefieotion of the snow and beyond opposite-sides ofv the roadway.

A furtherobject is toenable the plow-supportcured to the front end of i the frame ain ing frame with the plow thereon to be conven'i- 49 ently and expeditiously raised and lowered and also tilted forwardly and rearwardly and transversely as may be required when the apparatus is traveling free 01' when adjusting the plow to the contour of theroad bed to regulate the depth of cut.

Another object is to provide the plow-supporting frame, withfulcrum-shoes adapted toride along and upon the road surface and arranged so as to take approximately the entire weight of and loadupon the plow. and frame and also to form fulcrum bearings upon the roadbed about which the frame. and plow may be tilted to regulate the depth of the cut.

Other objects and uses relating vto specific 4-4, Figure 2.

vertical plane of the center line with their driven forwardly at a sufficiently high rate of parts of'the apparatus will be brought out in V the following description.

Inthe drawings:- Figure 1 is a top plan of a plow attachment embodying the various features of my invention 30 as applied to a motor. truck, a part of which is shown by dotted lines. 7

Figure 2 is a longitudinal vertical sectional view of the same apparatus taken in the plane of line 22, Figure 1.

Figure 3 is an enlarged verticalsectional view taken in the plane of line 33, Figure 1, the outer portions of the moldboards being broken away. 7 r

Figure 4 is a horizontal detail sectional View, partly broken away, taken in the plane of. line -Figure 5 is an'enlarged detail sectional view taken in the plane of line 55, Figure 4.

Figure 6 is a perspective view of a modified form of plow-point omitting the draft lug shown in Figures 1 and 2, but indicating in dotted lines,

'the positions of said lug.'

ing secured by rearwardly projecting braces 4-. to the underside of the chassis frame a, as shown in Figure 1, fortransmitting'motion to the frame 1- as the truck is moved forwarly.

The cross bar 3- is bolted or otherwise sea plane above the cross bar 2 foradditiohally holding the frame l in fixed relation to the chassis frame ait being understood that the devices for securing the bars -2- and 3'- to the chassis frame a are releasable to allow the frame 1 to be attached to and removed from the truck, when desired. The horizontal cross bars 2 and "3' extend equal distances beyond the longitudinal" center of the chassis and are connected near machine, as shown more clearly in Figures 2 and 3;

A pair of similar upright frame bars -6 are bolted, riveted or otherwise permanently secured the chassis frame a-, as shown more clearly in Figure 1, for holding the upright bars or posts 6 against forward and rearward vibration.

The upper ends of the upright posts 6- are connected by a cross bar -8 bolted or otherwise rigidly secured thereto and extended laterally relatively short distances .beyond thesame to form suitable anchorages for the flexible cables which support the rear end of the plowsupporting frame hereinafter described, said I cross bar -8 preferably consisting of an angle iron arranged with its open angle facing forwardly as shown more clearly in Figures 2 and 3. The upright bars -6- and upper cross bar -8 are connected by diagonal braces 9- bolted or otherwise secured thereto for stifiening the adjacent portions of the main supporting frame.

A relatively short lengthwise bar -lis bolted or otherwise rigidly secured to the upper cross bar 8-' midway between its ends to extend forwardly therefrom and has its forward end connected by braces 11 to the upright posts -6 somedistance below the upper ends thereof for additionally stiffening the upper por- 'tion of the main frame and,.together with the upright posts -6 and. forwardly projecting bar l0-, constitute what may be termed a crane for receiving a plow-hoisting mechanism hereinafter described, the bar -l0 being ar I ranged in the vertical plane of the longitudinal center of the chassis.

The arm l0 is connected just back of its front end to the opposite ends of the upper cross bar 8-- by diagonal braces 12 to additionally stiffen the arm against lateral vibration, see Figure 1.

Plow-supporting frame The plow-supporting frame is separate from themain supporting frame for vertical movement relatively thereto and comprises a lower -horizontal cross bar --l3 extending transupwardly equal distances therefrom in trans-' I versely spaced parallel relation'and are connected at their upper ends by a crossbar which is bolted or otherwise rigidly secured to the posts 14 in vertically spaced parallel relation to the lower bar '-l-3, said posts 14- being connected intermediate their ends by an additional cross bar l6-- which is bolted or otherwise secured thereto to stiffen the adjacent portion of the plow-supporting frame.

The upper bar l5 extends laterally equal distances beyond the posts 14 and has its outer ends bolted or otherwise rigidly secured to an additional pair of upright posts -l'7.

The lower ends of the posts l'7 are bolted or otherwise rigidly secured to the lower horizontal bar 13 to extend upwardly equal distances therefrom in transversely spaced parallel relation some distance above the upper bar -15, said posts 17- being arranged at the outer sides of the adjacentposts 14 in spaced relation thereto to permit the passage of suitable thrust bars, presently described, through the intervening spaces.

Theseupright posts 1'7 are provided at their upper ends with outwardly projecting laterally extending arms l8 of equal length, bolted or otherwise rigidly seemed to their respective posts -1'7 to project outwardly therefrom at right angles thereto and having their outer ends connected by braces 19- to the upper cross bar 15- of the plow-supporting frame, said braces 19 being extended downwardly and inwardly across the rear faces of the upright posts l'7- and having their intermediate portions bolted or otherwise rigidly secured thereto to assist in stiffening the adjacent portions of the plow-supporting frame. See Figure 3.

The outer endsof the lower bar -l3- of the plow-supporting frame are provided with similar upwardly divergent brace bars 20-bolted or otherwise rigidly secured thereto and, together with the upper horizontal bars 18 constitute rigid supports fora pair of oppositely arranged forwardly convergent moldboards -2l' ofthe plow forsupporting said moldboards equal distances from and at opposite sides of the longitudinal center ofthe truck chassis.

That is, each moldboard'is providedonits inner rear side with a transversely extending rib or flange 22 tolwhich the outer ends .of

the upper horizontal bars 18 and also the I braces -19 are bolted or otherwise rigidly secured as shown more clearly in Figure 3, said bars -1-8' beingsecured to the reinforcing ribs or flanges --22 near the upper edges'of' the moldboards.

These reinforcing ribs- 22- extend from points near the upper edges of the moldboards 2l downwardly to points near the lower edges thereof as shown in Figure 2. and are permanently secured to the inner rear faces of the moldboardsto assistin mantaining the concavo-convex contour thereof, the lower edges of the reinforcing ribs being flattened and bolted, or otherwise secured, to the adjacent portions of the moldboards.

Additional reinforcing, members '-23'- are bolted or otherwise permanently secured to'the inner rear facesof -the lower edge of'the'moldboards, as shown"in'Figure"3, and'are-provided with downwardly, projecting flanges 23" having ancho-rages"24- for receivingthe-lower ends of 'apair of chains or-cables --25-- which are attached at their-upper ends to suitable anchorages -26- on theouter ends of the upper bar 8-- of the main-supporting frame, as shown more clearly in Figure-3i The upper ends of the.brace bars.s-20'-.- are bolted or otherwisemig'idljrrsecured t'octhe reinforcing members -23-. and corresponding';por-' tions of the moldboards 2l to additionally allybraced from the-"bars 31' by brace-bars hold the moldboards in equallyspaced relation ,at Opposite .sides ofthe longitudinal center of the'chassis.

i 'As "previously intimated; the moldboards 21-.' are concavo-convex in cross section and arranged with their concave sides facing for- '2l' are disposed at an obtuse angle to each other and are provided with cutting plates '28of hardened steel or equivalent material riveted or otherwise permanently secured to the the chains in the grab-hook anchors -26 on adjacent portions of the moldboards, the lower edges of said cutting plates being disposed in a substantially horizontal plane for engagement with the snow and ice adjacent the roadbed.

The remaining portions of the moldboar ds at the rear of the cutting plates -f-28-- are curved upwardly, rearwardly and forwardly and have their upper longitudinal edges bent inwardly to form reinforcing flanges -29- for stiffening the same, said flanged upper edges of the moldboards being preferably disposed at an acute angle to each other to reduce to a minimum the resistance incidental to the contact of the snow and ice therewith as the rnachine is 'propelledforwardly. 1

Under this construction and arrangement of the moldboards of the plow and resultant reduction of the resistance to its forward movement through the snow and ice, it is evident that the machine may be driven at a relatively high rate of speed under which thesnow and ice would be rapidly deflected beyond the sides of the road or some distance beyond thepath of travel of the machine; 7 V

The lower edges of the moldboards' at the rear of the cutting plates -28- are provided with reinforcing bars 23-, preferably angle" irons,

.boltedor otherwise rigidly secured thereto, as

7 shown more clearly in Figures 2 and 3.

In like manner the lower horizontal front edges of the moldboards are reinforced by additional angle bars '-30, welded or otherwise rigidly securedto the inner rear faces thereof in planesslightly above the lower edges of the cutter plates 28'- which are alsowelded or otherwise secured tothe lower front facesof the adjacent portions of the. moldboards and their. reinforcing bars -30.

The lower portion of the plow-supporting frame is also provided with a pair of bars --31-- arranged in transversely spaced parallel relation equal distances from, and at opposite sides of, the longitudinal center of the truck and having their rear ends rigidly secured by any suitable fastening means to the cross bar 13 and their front ends rigidly secured to the reinforcing bars 30-, as shown more clearly in Figures 2 and 4, for supporting the front portion of the plow while the upright posts .1f7- serve to support the rear portions of the moldboards 21.

The moldboards of the plow may be addition- 'corresponding posts r-14+- and -17-,

' pelled forwardly.

-31- shown in part inFigure 1.

- The plow-supporting frame is "connected to the main frame '1- by means of a pair of thrust bars or links -32-' arranged in trans-'1 to extend forwardly and rearwardly between the said thrust bars being pivoted at -33- to the l'ow'erf..85 ends of the upright posts-5- of the main supporting frame '1 and having their front ends pivoted at 34 to the lower bars -31 of the plow-supporting frame, as shown more clearly in Figures 2 and 4, thus permitting the 6590 plow-supporting frame with the plow thereon to 'be' adjusted vertically relatively to the main frame 1.

w That is, the rearportion of the plow-supporting frame and corresponding portions of the 8:95

plow may, be adjusted vertically through the medium of the chains or cables --25- by simply engaging different links on the upper ends of opposite ends of the upper bar 8 of the E main-supporting frame 1-. 1

The front 811G101" the plow-supporting frame and corresponding portions of the plow may be [adjusted vertically by means of a chain or. cable 35 having its upper end divided into 105. branches --3 5 which are passed over a pair of sprocket wheels --36 on a rotary shaft 3'7-,

j the latter being journaled in a suitable gear case -38- on the front endof the upper-lengthwise bar 10 of the plow-supporting frame as 6110 shown in Figures 1 andZ, said gear case containing a quantity of oil for lubricating the gearing. V V

The lower end of the hoisting chain or cable ---35v is attached to an anchor plate 39-' which is rigidly secured to the lower front rein- .Figures 1 and 21 Thelower bars -31 of the plow-supporting frame; are provided with fulcrum shoes -40'Ll25 welded or otherwise rigidly secured to the undersides thereof intermediate their ends and parallel therewith to ride along and upon the surface of the roadbed as the machine is pro- 1:130 These fulcrum shoes -40 are located just at therear ofthe pivotal connections 34 beangles about the fulcrum bearings of the shoes housing 38-, one of said gears being actuated by an operating shaft -i1- extending rearwardly from the gear case-38-.- into the cab, as .a-, of the truck whereit isprovided with a hand wheel 42- for rotating the-same in reverse directions and thereby effecting a corresponding reverse movement of the sprocket wheels -36 for winding and. unwinding the front chain 37 thereon and therefrom, .to effect the raising and lowering of the front end of the plow-supportingframe.

If desired, the space between the upper edges of the moldboards 21-- adjacent the plow point may be covered by a deflecting plate ,43, the purpose of which is to forwardly deflect snow or, ice which may be carried upwardly to the top of the plow point andthus prevent such snow and ice from passing rearwardly into the top of the truck. v

A relatively thin cutter plateof hardened steel or equivalent. material 44- is rigidly secured to the apex of the plow to project .forwardly and downwardly therefrom for cutting and breaking up any snow, crust or ice in the path of the plow as the truck is propelled forwardly. I

The point of the plow is also provided witha bearing plate 45- of hardened steel or equivalent material rigidly secured thereto to project downwardly and forwardly therefrom between the adjacent ends of the cutting plates -28 and, if desired, may be providedwith a .forwardly projecting lug 46 having an aperture -47 for attachment to another truck in case it should be necessary .to use additional power for the propulsion V of l the snow plow through excessive quantities of snow and ice.

Operation Assuming that the plow-supporting frame with the plow thereon has been raised clear of the pavement or ground so that the machine may be propelled fromone locality to the place of use, this vertical movement being effected entirely by the proper adjustment of the chains 25- and 35 oh the mainsupporting frame.

When it is desired to use the plow for clearpavement and the front cable 35 would be under more or less tension.

Now, if it should be desired to bring the cutter bars 28 into closer relation to the pavement, it would be simply necessary to release the cables 35 by turning the shaft -4l in the-proper direction, and to take upthe rear chains 25, thereby causing the front portion of the plowsupporting frame to rock downwardly about the fulcrum bearing of the shoes40 upon the pavement, it beingunderstood that this forward and downward tilting movement would befpermitted by the slackening of the front chains It will be noted that when the plow-supporting frame is lowered sufficiently to allow the shoes -40' to rest upon the pavement, said frame justed to produce the desired depth of cut and it is necessary to cease further operations of the plow, the entire plow-supporting frame with the plow thereon may be easily and quickly raised clear from thepavement bysimply winding the upper ends of the chain 35 upon the sprockets -3G by the properrotation of the operating shaft --41--, it being understood that this raising and lowering of the plow-supporting frame is permitted by the link connections 32 between the plow-supporting frame and main frame 1.

It will be evident from the foregoing description and the drawings that the construction is particularly simple, durable and efficient forthe work required and that the various moving parts may be easily and quickly set or adjusted to the various positionsbest adapted for the work, but obviously various changes may be made in certain details of the construction without departing from the spirit of the invention.

What I claim is.:

In a snow-plow attachment fo'r motor trucks, a main frame and means for rigidly securing it to the frontend of the truck, in combination with thrust barshinged to the frame and projecting forwardly therefrom for vertical swinging movement,.a second frame hinged intermediate its front and rear ends to the front ends of the thrust .bars .for vertical rocking movement and provided at the rear of its hinge with road-engaging fulcra, aplow carried by the sec-.

ond frame, and means mounted on the main frame and connected to the second frame in front of its :fulcra for tilting the second frame vertically about the fulcra bearing on the road and thereby varying the depth of cut of the plow.

CARL H. FRINK.

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