Патент USA US2404760код для вставки
July 23, 1946. 2,404,760 H. H. wAsHBOND BULLDOZER OR SCRAPER STRUCTURE ì Filed Feb. 22, 1944 4 Sheets-Sheet l mv ln N . ' à if@ ¿Zr/@LM f/NE YM Swami. 5 I ` July 23, 1946. V H. wAsHBoND BULLDOZER OR SCRAPER STRUCTUREV Filed Feb. 22, 1944 ON` 2,404,760 Juäy 23, i946. H. H. wAsHBoND 2,404,760 BULLDOZER OR SCRÀPER> STRUCTURE Filed Feb. 22, 1944 4 Sheets-Sheet 3 July 23, `1946. H. H_‘wASHBOND 2,404,760 ' BULLDOZER‘OF( SCRAPER STRUCTURE Filed Feb. 22, 1944 " 4 sheets-sheet 4 26'4358 44 il» :lll MMM-ff Patented July 23, 1946 2,404,760 i UNITED STATES PATENT' OFFICE v ` `2,404,760 ‘ ` A ` ` BULLDOZER oit SCRAPER“ STRUCTURE Harry H. Waslibond,V Springfield», 111., assignerA to The Baker Manufacturing Company, Spring field, Ill., a corporation of Illinois ` . Y A Applicationv February 22, 1944, Serial No. 523,465 10 Claims. ' - \ ‘ (C1. 37-1‘44) 21 1` This' invention relates to a bulldozer or scraper structure adapted for attachment t0` and control l2 having `a seat I3 therein. A- re'ar axle housing it> supports theV track frames l5, and transmis from a power Vehicle, such' as a tractor'. sion inean‘s‘?notY shown) with-in- the axle housing is driven by the engine for drive» of the Shaft structure' it" which carries the driving sprockets ' im> important object of the invention is to pro' duce an eñîcient bulldozer' or scraper' whose op il. Forwardly of the rear axlelfiousingg` is a cross erating‘ parts are‘supp'orted ón the front end of a support I8 which extends from the vehicle body pOWei“ Vehicle in front ofY thedí‘iver’s 'cab ‘so that the‘drive‘r may readily observe the operation.` to the track frames l5, and on the forward ends Another object is to provide an arrangement of the track frames are mounted the idler wheels in‘ which the support for the blade elementV of the ll v íli, endless tracks 2li engaging the sprocketwheels bulldozer or scraper embodies a pair of linkage and idler wheels on opposite sides‘of the vehicle. quadrilaterals of which the blade element con Trackrollers 2l’ on the track frame engage withI stitutes the front link. ` the lower ‘runs’ ofthe tracks. A furthe'r‘object is` to provide an arrangement ' ‘ Secured to andi extending` forwardly from- the in ‘which hydraulic power means moin‘ited4 on the 15 vehicle body lû" at opposite~` sides thereof are‘ the ‘vehicle is connected to' apply power to the lower links of the` quadrilateral linkages for operation of' said blade element into various operating po# sitionsin a'substa'ntially vertical direction. beams 22 and 2‘3 which near their front ends are spanned -by a cross-beam` 2li secured against the under sides thereoil This beam' structure serves A- further object isv to yprovide- an' arrangement 20 whielrtliey lower links vof ‘ the' linkages consti as aV supportA for the bulldozer or scraper assembly. ` > l . , . TheV blade element of the bulldozer comprises tutes pus-h'~‘ba"rsY hinged to the vehicle' and to' the lowerfportionl of the blade element,` and with a2 single hydraulic cylinder-piston structure the transversely curved-_ blade 25 reinforced on its isv connected with the p_ushl links and the brace bars so> that the power for vertically setting the their front ends' the upper and lower links 3B and 3l are hinged- to the blade element 25 by pins 33 and 3"4,_respectiîvely». At their rear ends the upper links Zware pivoted to the upper ends'of the inner middle portion -by ribs `2li secured to its rear side, a knife edge structure 2l forming the lower por mounted on the vehicle having leverage- connec-- 25 tion of the blade. The blade- element constitutes _tion `with the lower links for exertionÍ of power a front link of two linkagequadrilaterals 23A and oni these# links in» substantially vertical' direction. 29. These linkage quadrilaterals are* alike and Another object is to provide an arrangement each comprisesH an upper link 30, a lower link 3| inA which. brace. bars- are extended ïfrom- the push andan inner link 32;> the blade element 2-5 form; linksìtoxthe outer ends ofthe blade element, and 30 ing a commonu outer link for the two linkages.A At the leverage operated` by the hydraulic“ means blade element is applied closer tothe outer ends of the blade element. Other and further objects of the invention will becomeY apparent to those skilled in the art from the` following» detailed description on the annexed :sheets of drawings which disclose preferred em bodiments of thelinvention. Qn the drawings: Eigure 1` is a side elevation of a power Vehicle with the bulldozer or scraper structure thereon; Figure 2. is a plan view; Figure 3 is an enlarged section on plane III-IIIY Figure 2; and Eigure Liis a section on plane >IV-IV Figure The power vehicle to which I have shown my improved bulldozer or scraper assembly applied links-32 by pins'. te', and at their lower ends the inner.’ links 32’ are pivotedto: brackets 353 secured on the lowerV links 3l.Y The lower links extend rearwardly beyond. their connections with the inner links to be» fulcr'umed on brackets 3l se cured tol the `beams 22 and> 23; Brace bars 38 extend between the lower links` 3l' and thee'nds of the bladei element 25 t'o stiffenlthe blade ele-V ment and form» additional supportA therefor. As shown on Figures‘Z` andl‘if, the hinge pins’3‘4‘rwhich extend throughI the inner» ribs 26«of the blade' 25 are extended'l laterallyl outwardly through'V outer ribs 26* to receive-the front ends-cf the-brïacebars 33 to hingeconnect'them-with the blade eler'nent.` On the>V forward ends oft-he beam 22; zii-brack is a tractor of the type in which the driving en gine is in the rear of the vehicle body and the~ `< 'ï` ets 39 are secured, links~4ß being pivoted at their driver’s cab is inthe front. Briefly describing the front ends tothe-brackets as-indicate'd- atMï and» tractor, it comprises a frame or body Ill‘ at" the rear of which is mounted the engine frame Il and at their rear ends being- pivoted to' corre’-V SpdndingY inner links‘32 as indicated atl?. These` at the’front of which is located the driver’s cab' e lìnks'llû hold the links of thelinkageqlllatii‘i'l‘alt-` 2,404,760 3 4 erals in relative position for the desired tilt Aor through a scraping range from about 142 inches rake of the blade element from the perpendicular. ' ^ As best shown on Figure 2, plates 43 span and below tractor ground line to about 12 inches above ground line and then tilt the blade forwardly about 15° as it rises above the scraping range. are secured to the brace bars 38 and the lower links 3| and on these plates brackets 44 are mounted. Bars 45 are pivoted at their lower ends to the brackets 44 and at their upper ends are pivoted to L~.-shaped levers 46 which extend rear wardly and receive at their rear ends a fulcrum . With the hydraulic power transmitting connec tion shown, the bars 45 will, during swing of the scraper structure into various positions, transmit the hydraulic power substantially inevertical di rection to the push links of the linkage quadri rod 4l extending between and journaled in the 10 laterals, thus utilizing to a maximum extent the hydraulic power from the hydraulic ram or cylin upper ends of brackets 48 mounted on the beams der-piston structure. 22 and 23. A spacer tube 49 receives the rod 41 _Some of the push power applied by the vehicle and extends between the brackets, as ¿clearly to the push links will be applied to the ends of shown on Figure 4. Pins 50 extend through the> the blade element through the brace bars 33, and outer ends of the rod 4l adjacent to the outer with the brackets 44 mounted on the cross plates sides of the brackets to hold the rod in place. ; 43, the hydraulic power transmitted through the The beam 24 has upstanding ears 5i.' ' Acylin; " i der 52 has the lug 53 extending down between the ears5l to be hingedfthereto by a pin 54. The bars-45 to the brackets will be borne conjointly > ing between the> levers 4S. blade element is thus ‘distributed along the’ made by the push links and the brace bars. The push levers, .45 are connected _at _their bends by a rod 20 force against the blade element by the vehicle and the hydraulic force for vertical setting ofthe. 55, a spacer tube 56receiving the rod and extend tending Yfrom the piston (not shown) in the cylin element by the connections therewith -of the pushA der projectsat its _outer end_into the opening 58 in_thespacer tube 5_6 to receive and to be ful links and the Ibrace bars. " ' ‘ ' ’ » I am'aware that many changes may be made 25 and numerous details of construction may be` varied through a wide range without departingl Hydraulic fluid conductors 59 >and 60 extend from the principles of this invention, and 1 there from _the lower and upper ends of the> cylinder to fore do not purpose limiting the patent granted a valve structure V for which a suitable -control crumedtothe rod 55. ' l , ` ` » ‘ ` C is provided Yfor operation by the driver in the cab. From a pump P fluid is delivered under hy 30 heli-:ecn otherwise than necessitated by the priori ar . " ' ' ' ' I claim as my invention: A ' l draulic pressure through a conductor `iìn't'o‘th‘e 1. A bulldozer structure'for application at the valve structure [or now to either end of the vcylin front of a power vehicle, comprising' a blade ele der by the setting of the valve V by the control C. -A reservoir R supplies the fluid to theV pump P 35 ment, push bars at opposite sides Vof the vehicle body hinged thereto and extending forwardly through conductor 6 I a (Fig. 2) i _ Whenfthe'vehi'cle is driven forwardly for op eration’ of the scraper structure, the lower links 3l will function Vas push beams for engagement of the scraper blade with the terrain which is to be operated upon. The -lupper and-inner links therefrom and connected with said blade element Y brace bars extending diagonally outwardly from _, said push bars and connected at> their outerïends Sil’and> 32 andthe intermediate links 40 will then function tov hold- the upper portion of the blade element to maintain 'the proper tilt or rake there-v ._y »_ of from -the perpendicular. . . On Ilî’igure 3 the »full lines show th'e scraper structure in an intermediate position. If it is desired to lower the scraper structure, the valve V isset by thecontrol C for iiow of hydraulic with said blade element, asupport> spanning Leachv push bar and itsl brace bar and secured thereto, brackets on said supports, a lever structure ful crumed at its inner end on` the lvehicle' body, power transmission bars betweenthe outer l,end of saidlever structure and said brackets, a hy draulic power device on the vehicle body connect.. edwith said` lever structure at an intermediate point thereof for swinging said leverstructure vertically for transmission of the hydraulic- power iluíd through the conductor 6D into the upper` 50 through said ytransmission bars and brackets to end of the cylinder for inward movement of the piston, and this movement of the piston is trans mitted through the rod 55 to the levers 46 whose downward swing is transmitted through the bars said push bar structures for vertical swing there of for operation setting of the blade element; 2. In combination with arpower vehicle com prising a body and propulsion means therefor, a 45 to the push links 3l for downward `movement 55 bulldozer structure located in front of the Vehicle of the scraper structure, the short dot lines on body and comprising a blade element, push bars Figure 3 showing the down position of the scraper at opposite sides of the vehicle hingedat -th'eir structure. If it is vdesired to raise the scraper rear ends thereto and extending forwardly there structure, the valve is set for flow of hydraulic huid through the conductor 59 to the lower end 60 from for hinge connection with the lower portion' of saidblade element, a linkage assembly con of the cylinder for upward swing of the levers 46 and upswing o_f the push links 3|,A the longr dot lines on Figure 3 showing the upper portion of the scraper structure. With the blade elementy sup necting the upper portion of said blade element with said push bars, guide links between said link age assembly and the vehicle body for’co-opera ported and guided by the linkage quadrilaterals, 65 tion to determine the rake of the blade element when moved vertically with said push bars', a theblade element will substantially retain the same tilt or rake through its scraping range above lever structure fulcrumed at its inner end on the vehicle body, transmission bars depending from and below the tractor ground line and _will tilt the forward end of ‘said lever structure to said forwardly above the scraping range to more freely discharge dirt. Thus while the blade will move 70 push bars, and a> hydraulic power device mounted on the vehicle body and connected with said lever` substantially in a vertical line when swung to Vits structure at an intermediate point thereof where various scraping positions,_it is preferably' tilted by, upon swing of said lever structure by said'` above the scraping range. For example the blade rake controlling links 30, 32 and 40 are preferably . l hydraulic device, hydraulic power willbe transl-r arranged so that they will hold the blade vertical 75 mi'tte'd- through said transmission barsto said'Vl 2,404,760 5 Àpush bars for‘swing ofsaid bars and operation setting of said blade element. 3. In combination with a tractor comprising a» body and propulsion means,therefor, a bull dezer attachment for the front of the tractor comprising a blade element, a support for said blade embodying a pair of linkage quadrilaterals of which said blade element constitutes the outer link, the lower links of said linkage quadrilater als being hinged at their rear ends to the tractor body Vto constitute push bars for the blade ele ment, guide links between said linkage quadri and the tractor bodyfor co-operating laterals with the linkage quadrilaterals to determine the rake of the blade element during vertical move- ‘_ eringthe push beamsand blade relative to the tractor, and meansA connecting 4the second links and tractor to hold the blade in the same vertical plane as it is raised and lowered throughout its tilting range and-to tilt the upper end of the blade `forwardly as the >blade is raised above its tilting range. , Y '7. In combination, atractor having an oper ator’s cab at the front end thereof and an engine behind the cab, an implement blade extending across the front of the tractor in closely spaced relation to said operator’s cab, push beams >on each side ofthe tractor pivotally connected` at their rear ends to the tractor and at their front ends to the lower end of the implement blade, upper push links on opposite sides of the tractor pivoted at their front ends to the upper end of the blade, fulcrums for said upper push links, ment thereof, a lever structure fulcrumed at its inner end on the tractor body, transmission bars depending from the forward end of said lever means responsive to raising and. lowering of the structure to said linkage quadrilaterals, and a hy blade for shifting said fulcrums relative to the draulic power device mounted on the tractor body 20 push beams to control rake of the blade, levers and connected with said lever structure at an in on opposite sides of the tractor pivoted at their termediate point thereof whereby, upon swing of rear ends to the front end of the tractor and pro said lever structure by said hydraulic device, said jecting forwardly therefrom, a rigid power trans push bars will be swung for operation setting of mission link pivoted on the front end of each said blade element under control of said linkage 25 lever and depending therefrom, means pivotally Y quadrilaterals and guide links connecting the lower ends of the power trans 4. In combination with a tractor having sup mission links with the push beams, «double acting porting beams extending forwardly from its body hydraulic jack means pivoted on the front end of and intermediate the tractor wheels, a bulldozer the tractor and connected to the levers inter structure comprising a blade element, push bars mediate the ends of the levers for positively rais pivoted Vat their inner ends on said supporting ing and lowering the blade relative to the tractor, beams and connected at their outer ends with the and means in the cab of the tractor for operating blade element, brackets on said supporting beams, said jack means whereby an operator in said cab arms pivoted to and extending forwardly from `will have full vision of material engaged by the said brackets and links extending down from the 35 implement blade during scraping operation and forward ends of the arms and connected with said can more efficiently control the position of the push bars, a rigid cross connection between said blade. ' arms intermediate their ends, a supporting plate 8. In combination, a tractor having an oper mounted on and extending between said sup ator’s cab at the front end thereof, an implement porting beams, and a hydraulic power device ex 40 blade extending across the front end of the trac tending between said supporting plate and said tor closely adjacent said operator’s cab, push cross connection for effecting vertical swing of beams pivoted on the front end of the tractor in said arms and thereby vertical swing of said push spaced relation adjacent the sides of the tractor bars and with the blade element thereon. and extending forwardly therefrom for a rela 45 5. A bulldozer structure for application at the tively short distance, pivots connecting the for front of a power vehicle, comprising a blade ele ward ends of the push beams with the lower end ment, push bars at opposite sides of the vehicle of the implement blade, relatively short push body hinged thereto and extending forwardly links overlying the push beams pivotally con therefrom and connected with said blade element, nected to the upper portion of the blade to co brace bars extending diagonally outwardly from 50 operate with the push beams for holding the said push bars, a plate spanning each push bar blade in upright position, fulcrums for said push and its brace bar and rigidly secured thereto, a links, means responsive to raising and lowering hydraulic ram carried by the vehicle, a frame ful of the blade for shifting said fulcrums relative to crumed at its inner end on the vehicle body and the push'beams to control rake of the blade, lift having a cross bar intermediate its ends acted on 55 levers fulcrumed on the front end of the tractor by said ram for vertical swing of said frame, and and extending forwardly therefrom, rigid power links extending downwardly from the outer end transmission links pivoted on the front ends of of said frame and pivoted at their lower ends said levers and pivotally connected to the push respectively to said plates for transmitting the beams, double acting hydraulic jack means piv 60 oted on the front end of the tractor and connected swing of said frame to said push bars. 6. In combination a tractor, push beams piv oted on the tractor extending forwardly there from, an implement blade extending across the front end of the tractor having its lower portion with said lift levers intermediate the ends thereof in spaced relation from the lever fulcrums and power transmission links to swing the levers for raising and lowering the blade relativeto the pivoted on the push beams, first links pivotally 65 tractor, and a valve in said operator’s cab con connected tothe upper portion of the blade and trolling fluid flow to said hydraulic jack meansk extending rearwardly therefrom toward the trac whereby the operator can readily view the work tor, second links pivoted to the rear ends of the ing of the blade and easily control action of the first links and to the push beams, first arms piv blade to obtain efficient operation. oted on the push beams and extending upwardly 70 9. In combination with a propulsion vehicle, therefrom, second arms pivoted on the first arms an implement blade extending across the front and extending rearwardly therefrom, pivots oon of the vehicle, a lower push link pivotally con necting the rear ends of the second arms to the tractor, a hydraulic jack interposed between the tractor and the second arms for raising and low necting the vehicle and lower portion of the blade, a guide link pivoted on the vehicle, an 2,404,760' upper linkage connected to said guide link, said 10. In combination' with a propulsion vehicle, lower push link, and the upper portionl of the an implement bladel extending across the front of blade, a lift lever fulcrumed on the vehicle, a -hydraulic jack pîvoted on the vehicle and piv the vehic1e,‘a lowerpush link pivotally` connect Aing the vehicle and lower portion of the blade, an otallyconnected vto the lift lever for swinging the leveriabout its fulcrum, and a power transmis $1 upperpush link pivotally connected to the blade, a. fulcrum for said link, means responsive to rais sion link pivoted on the lever in spaced relation ing and lowering of the blade for shifting said from the fulcrum and jack pivot for raisingand fulcrum relative to the lower push link to control lowering >the .blade in response to swinging move the rake 0f the blade, a lift lever fulcrumed' on ments of the lever, said pivotal mounting >for the the vehicle, means on the vehicle for swinging jacks effecting straight-line application of force said lever about its fulcrum, and means between to the lever in all' positions of the lever through the lever and blade for translating swinging out. its arc of travel, and said guide linkcon movements of the lever into raising and lowering trolling said upper linkage for regulating the rake ofthe blade. „ movements of the blade- , 15 . ' HARRY H. WASHBOND.