Патент USA US2112288код для вставки
March 29, 1938. J, P, HElL» i v 2,112,288 SCRAPER Filed OOÍH‘ 24, 1936 ATTORNEYê Patented- Mar. 29, 1938 2,ll2,288 UNITED STATES PATENT y OFFICEy 2,112,288 ' SCRAPER Julius P. Heil, Whiteiish Bay, Wis., assignor to The Heil Co., Milwaukee, Wis., a corporation of Wisconsin Application October 24,1936, Serial No. 107,380 9 Claims. (Cl. 37-124) My present invention relates generally to im provements in the construction and operation of scrapers for grading and for transporting batches of dirt, and4 relates more particularly to improve 5 ments in the details of v construction of dirt handling machines of the general type' forming the subject of Patent No. 2,095,759. Generally defined, an object of my invention is to provide an improved scraper assembly which 10 is adapted to eiiiciently handle`v dirt of various kinds under the severest conditions, without the use of excessive effort and without. danger of damaging the machine. ` In the prior Patent No. 2,095,759, above referred 15 to, there is shown a road scraper comprising a main dirt carrying bowl mounted for transporta tion along the ground and having a front cutter the elements by intervening stones, stumps or other abnormal objects. ‘ ` ` Still another speciñc object of the invention is to provide simple, compact and durable means for eiïecting rapid and most eiiicient loading and un- 5 loading of a scraper type of dirtl carrying unit.v These and other speciiic objects and advan tages will be apparent from the following detailed description; and it is to be noted that some of the improved features of scraper assembly shown and `10 described but not claimed herein, form the sub 'ject of the co-pending application herein-above referred to. , A clear conception of the improved details of construction constituting the present invention, l5 and of the mode of constructing and of operating Scrapers built in accordance with this improve adapted to be lowered into'~ the ,earth for scraping - ment, may be had by referring tothe drawing ac purposes, and front and rear, aprons swingably companying and forming a part of this specifica 20 suspended for cooperationv with the cutter and tion wherein like reference characters designate'r 20 with the bowl bottom, respectively,_for loading and unloading purposes. While this prior scraper operates most effectively whenhandling ordinary dirt, it has been foundrthat wetv clay and other sticky soil tends to adhere to the bowl bottom and obstructs rapid unloading of the contents by the rear apron. It has also been discovered that large rocks or other obstructions located in the path of the cutter, prevent the -latter _from being 30 elevated so as to permit simultaneous tight closure of the front apron in order to confine the load, without subjecting thelower edge of the front apron to severe shock` and possible damage. While these unusual conditions of operation are 35 not of frequent occurrence, they may arise at any time and are not only annoying tothe operator butmay also cause loss of time due to necessary repairs. It is therefore a more speciñc object of my present invention to provide improvements in the construction of the dirt conñning apron or v aprons of Scrapers of the above described‘type, the same or similar parts in the several views. l Fig. 1 is a somewhat diagrammatic. central longitudinal vertical section through a scraper, showing the assemblage in load confining and transporting condition; and , - Y Fig. 2 is a similar view of the scraper assembly, 25 showing the elements thereof in unloading con dition. ~ ~ ' v While the invention‘is shown herein as beingapplied to a speciñc type of scraper assemblage, 30 it strict is not thethe scope, intent since to the thereby novelunnecessarilyre»` details of con struction may be more generally applicable. y The scraper assembly shown in the drawing by way of illustration, comprises in general a main 35 load receiving and confining bucket or bowl 5 sup ported to swing about'a rear axle Ii and having a front cutter 'I movable Atoward and away from ' the ground; a frame 8 normally .supported f to swing about a front `pivot or fulcrum 9 and hav-- 40 ing rearwardly extending‘laterally s_l‘nacedvsid‘e.` Q arms l0, the medial portionsof which’ are swing-3 ' whereby these aprons will function most eiïec the ablyside attached walls ItoI ofthe the forward‘upper bowl Eby means portionsof of‘alineïdf: tively under all conditions of operation. Another specific object of mypresent invention - pivot pins I2; a front load conñning `and k,cai‘ryf 45 is the provision of an improved unloading apron ing apron I3 swingably'suspended vfrom thej'pinsf assemblage* which is effectively cooperable with the bottomofthe load retaining bowl of a scraper, to V-reïr‘nove‘ all deposits therefromv during the un iO loadingoperation.v A n A'ïfurtheri‘specific object oi' this invention is the l*provision of an improved loading or load confin ing apron assemblage which cooperates with the cutter ‘of the scraper to permit effective conñne~ äw/ment of the charge without danger of damaging I2 and movable towardyand awayV from the ._cut'te'r'fy ' " ’ 'I and having opposite side walls I4 slidably cof” bowl operable 5; awith reartheload'conñning adjacent sidewalls `"pusher 'II or 'of I“apron the §50 I5v swingably suspended 'from' thel opposite îsifd/ ' walls H of the bowlfs'by means oraüneapwot and pins inI6^and close having proximity its'lower t'o ¿the'curved‘bottom` end 'movable along Il`4| of the bowl 5; a plurality rif-hydraulicjacks` "I il, I9, ”' 55 2,112,288 2 20 for independently actuating the bowl 5, apron I3 and apron I5 respectively; and rear and front wheels 2l, 22 for movably supporting the axle 6 and. the fulcrum 9 respectively. The main bowl 5 is preferably formed of heavy manipulated to move the rear apron I5 toward the rear end of the bowl bottom I1 as shown in Fig. 1. With the scraperelements thus'disposed, metal plates welded or otherwise rigidly united, and the bottom I1 is curved to substantially con form with an arc generated about the axis of the advancement of the mechanism along the ground will cause the cutter 1 to shear the dirt which will then advance rearwardly over the bowl bottom I1 and toward the rear apron I5, thus filling the bowl 5 with earth. When a suitable charge of pins I6 which swingably support the rear apron dirt has been admitted to the bowl, the set of 10 I5. The apron I5 which- is adapted to be swung 'jacks I8 may be operated to elevate the cutter _1 10 from the ground, and the jack I9 may be back and forth between the parallel side walls II away simultaneously operated to lower the front apron of the bowl 5 .by the hydraulic jack 20, has a I3 to the position shown in Fig. 1, thereby caus scraper Viìap 23 pivotally suspended from its ing the flap 21 to engage the upper portion of lower end; and this flap 23 which maybe com the cutter 1 and thus coniìning the load within 15 15 posed of one or more adjoining sections, spans the bowl 5 and within the apron I3. 'I'he con the bowl 5 and is adapted to ride along the upper fined load may then be transported over the surface ofthe bowl bottom I1 whenever the apron ground and may be subsequently dumped or un I5 is moved. The bowl 5 is adapted to be raised loaded by manipulatingthe jacks I9 and 20 to or lowered by means of two similar and simul taneously operable hydraulic jacks I8, the cylin 20 ders of which are carried byrigid rearwardly ex tending iframev members 24 formed integral with the bowl 5, and themembers 24 are swingably associated with 4the-rear axle 6 and also support 25 the rear apron actuating jack 20. As shown, the rear frame members 24 are rigidly attached to a sti'if` transverse `beam¥25 which interconnects the upper,` rear portions of the side walls II, and are also likewise attached tothe lower rear portion 30 of theA bowl 5 near "the, rear end of the bottom I1. ' The piston rods of the jacks 'I8 arel attached to raise the front apron I3 and to move the rear 20 apron I 5 along the interior of the bowl 5. As the rear apron I5 moves along the interior of the bowl ' 5, the flap 23 at the lower end of this apron will advance along the bowl bottom I1 and will thus effectively remove all of the dirt from within the 25 bowl. In this manner, the scraper may be quick ly loaded and unloaded, and removal of all of the charge is assured by the flap 23. If, during final loading of the scraper, the front apron I3 meets an obstruction such as a stone, 30 stump or the like, the flap 21 may swing about its pivot and away from the stop 28, and will ride another cross-'beam'26which rigidly intercon nects the rear upper ends" of the main frame over the top of the obstruction. The apron I3 may thus be lowered to its extreme position, and arms III), and the beams 25, 25 are preferably dis- , as the cutter 1 is raised to a position above the 35 35. posed- rearwardly of the top >of vthe bowl 5 so as ' to‘avoid obstruction to loading of the bowl with a steaml'shovel or the like.’4 v heffrontapronfIS and its side walls I4 are also formed of heavy metal plate, and -a lower edgev of thisiapron which coacts with the cutter 1, 40 v may> be_`provided with a pivotally suspended clo surefflap _2,1 >whichfjisvnorm'ally4k adapted to con tact with 'the' _cutter v1I as shown in Fig. 1. The ñap2'ljis prevented fromf'swi’nging outwardly to a position beyond tangen'cywith the apron I3, 45 by as_top 28, and this ñap may likewise be formed of'one o_rrmore adjoiningfsections _and spans the obstruction, the flap 21 will be brought to sealing position by the charge confined within the scrap er bowl 5 and within the front apron I3. It will therefore be apparent that the flap 21 associated with the front apron -I3 permits tight closing of 40 the load carrying elements, without subjecting the'apron I3 to undesirable stresses and possible breakage. - From the foregoing description it will be- ap parent that the present improvement comprising 45 the flaps 23, 21, will permit effective use of the scraperl assemblage even when the soil is sticky apron I3`.` As vshown in dash lines in Fig. 2, the and contains abnormal obstructions ` such .as kfront .apron flap 2]..may lswing inwardly of the .rocks` and stumps. The ñap 23 associated with apron I5 has been- found extremely effec apron.. I3_lafnd`.away,`f?om,the stop 28 when the the rear in removing wet clay and other sticky sub apron Í.I3 Í is lowered. andthe flap engages an ob tive stances from within the bowl 5 during unloading struction which'l cannot be severed by this flap. of the scraper, and also prevents the charge from The front apron-` I3 ¿may `be swung about its sus backing up into the space'at the rear of the apron pension_.»pins_l¿2. by .thehydraulic- jack I9 which _.is¿¿supportedA upon‘the .cross-beam 25. and coacts with theapron sidewalls _» Ilthrough linkage 29. ,During-_A normal, operation of the improved scraper, the4 unit is being drawn along the ground byjaïtractorf-attached to thedrawbar associated 60 t. with vfthe, _front `fulcrurn y9,. andl the hydraulic jacks I8,’«I9,‘20 are controllable by means of valve and pump-.mechanisms .of -well knownl construction 65.2 mountedyupon Y the,` tractor. near the driver’s seat. The `jacks =I8, f I9, 20 .mayjbej independently and .selectivelya-actuated»y.=at .-the: will of the operator, andwhen the fset- of . jacks l I 8l is: operated, the bowl 5-twillilbeiswung about‘îthelrear axle 6 land the main frame 8 willf‘be‘» simultaneously swung about theífrontßfulc'rum Svthus raising or lowering the pivotfpins~l2 »andf causing -the cutter 1 to move up or'down.. relativey to the ground`.-- When .the cutter 'I vis lowered into the ground, the hydraulic jack I9-should bemanipulated tomove the front apron I3 upwardly away from the bowl 5 as shown in 75 „Fig.,2.i and thehydraulic jack 20 should-also be l5. The flap 21 associated with the front apron 55 I3 will. obviously _function `to protect this apron against damage, and will also' maintain a thorough seal .between the apron I3 and the front of the bowl 5 when these elements have been Araised away from the ground. The flaps 23, 21 performjtheir function automatically, and be sides being extremely simple in construction, these flaps may be readily replaced in case they become twisted 'or broken. It should be understood that it is vnot desired to limit the present invention to the exact details of construction and to _the -precise mode of use . herein shown and described, for various modi- - ilcations within the scopeV of the claims may oc cur to persons skilled in the art. 70 1~. In a scraper, a bowl having _a frontl cutter and a laterally straight but longitudinally curved bottom, an apron swingable within said bowl toward and away from said cutter, and a rigid 75 2,112,288 rectilineal flap pivotally suspended from the lower end of said apron and having a straight knife edge engageable only with said bottom during swinging of said apron. - ' 2. In a scraper, a bowl having a laterally straight but longitudinally curved bottom and a cutter secured to the front of said bottom beneath the load supporting 'surface thereof, an apron swìngable within said bowl toward and away 10 from said cutter, and a rigid rectilineal ñap piv otally suspended from said apron and having a 3 therein toward and away from said cutter, said rear apron having a pivoted iiap at its lower end provided with a rectilineal knife edge engageable with said bottom, a front apron pivotally sus pended from said bowl and movable toward and away from said cutter, and a pivoted flap asso ciated with the lower end of said front apron and movable upwardly and downwardly with re spect to said cutter, said front apron iiap having a limit stop disposed externally of said aprons 10 and bowl. straight knife edge constantly engaging said bot 8. In a scraper, a bowl having a laterally tom in advance of said apron during movement s straight bottom and a cutter at the forward end of the latter toward said cutter. thereof, a rear apron movably suspended from 15 3. In a scraper, a bowl having a front cutter, said bowl to advance therein over said bottom an apron movable relative to said cutter to con toward and away from said cutter, a rigid ñap fine a load within said bowl, a ñap pivotally sus pivotally suspended from the lower end of said pended from said apron and being freely swing rear apron and having a rectilineal knife edge able toward and away from said cutter, and a stop for said ñap disposed externally of said 'apron and bowl. 4. In a scraper, a bowl having a front cutter, an apron pivotally suspended to swing toward and away from said cutter, al rigid flap pivotally engageable with said bottom during forward movement of said apron toward said cutter, a 20 front load confining apron pivotally suspended from said bowl and swingable toward and away from said cutter, and a rigid ñap pivotally sus 25 suspended from the lower end of said apron to pended from the lower end of said front apron swing freely toward and away from the bottom of said bowl, and a vstop for said iiap disposed externally of said apron. wardly with respect to said cutter when said front apron is in` lowermost position, said front 5. In a scraper, a bowl having a front scraper, 30 a front dirt conñning' apron pivotally suspended and being freely swingable upwardly and down apron flap having a limit stop disposed externally of said aprons and bowl. 9. In a scraper, a bowl having spaced parallel 80 from said bowl to swing toward said cutter, and flat side walls and a laterally rectilineal relatively a rigid iiap pivotally suspended from the lower » wide bottom rigidly attached at its opposite sides end oi' said apron and swingable toward and away to said walls, said bowl being constantly open at from said cutter, said iiap being swingable only its rearend near said bottom, a cutter secured 35 Within the conñnes of said apron and having a to the front of said bowl, a rear apron supported limit stop disposed externally of th/e apron. 6. In a scraper, a bowl having a cutter, a pair of aprons movable relative to said .bowl and co operable with the latter to confine material there 40 in, and a ñap pivotally suspended from the lower from said bowl and being movable toward- said cutter between said _side walls, means operable through the lower portion of said open bowl end and coacting- -with -the lower rear portion of said apron for moving the same, and a rigid flap piv 40 portion of each of said aprons, both of said ñaps otally suspended from the lowermost portion of being swingable toward and away from said cutter Asaid apron and having a rectilineal scraping and each other. edge engageable only with said bottom during 7. In a scraper, a bowl having a bottom and a said movement of the apron. 45 cutter at the forward end thereof, a rear apron 45 pivotally suspended from said bowl and movable JULrUs P. Een..