DE2323859A1 - FOUR WHEEL ELEVATOR TUG - Google Patents

Description

Four-wheel elevator tractor.

The invention relates to the field of self-loading tractors, which use a soil, Have loose rock collecting container, etc. with an elevator device or a hoist, which after the The front of the container is inclined to prevent movement of the material away from the scraper knife into the Support container.

The larger sized industrial scrapers are usually supported by a special two-wheeled one Two-wheel tractor towed. The elevator is driven by an elevator drive unit, regularly a hydraulic motor and a reduction gear, which are driven by a hydraulic pump the machine of the two-wheel tractor is powered or operated.

For smaller sized scrapers, which are in

generally have a capacity below 9 * 1 ^ m and which are often referred to as utility or agricultural scrapers a tractor with less horsepower can be used, which is usually a conventional four-wheeled farm -or. Farmers-

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'' tractor with a hitch and a PTO is. An elevator drive train is attached to the power take-off shaft or the power take-off point of the tractor connected to drive the elevator via a gearbox which is attached to the head and one end of the elevator drive shaft is provided. An average two-wheeled tug of the kind referred to is in the United States patent 3 o9o 1 ^ 9 revealed which the title "Zweiradschlepper" leads. U.S. Patent 2,9o 1J59 was issued May 21, 1965.

The invention is intended to be applied to smaller sized scrapers or utility scrapers and also finds its greatest area of application there. Nevertheless, many features of the invention can be identified also use in the same way with industrial scrapers.

In the case of the two-wheeled utility scraper of the type described in the aforementioned US patent specification J5 090 1 ^ 9 The elevator is driven by a gear box which is attached to one end of the elevator drive shaft is attached to the head of the elevator. The drive train from the power take-off point or the PTO shaft of the tractor on the gear box must take a somewhat winding path, since the lower one Position of the power take-off point and the offset higher position of the gear box must be taken into account.

So since it is necessary that the tractor swiveled relative to the center line of the scraper is, must be in the driving power train of various telescopic parts, special pivot bearings and a number of U-joints are operated to provide an efficient flow of propulsive power to the elevator to ensure.

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With the small, two-wheeled utility scrapers, as they are in the aforementioned patent are shown, no suspension is provided. The wheels are directly on the scraper hull attached so that when the scraper hits a rock or boulder or when If a change in the incline occurs, a significant change in the knife height is unavoidable, which makes it difficult to achieve a uniform cutting depth or removal depth.

In addition, because only two wheels take the load, the tires have to be larger by one to achieve lateral support and to distribute the ground pressure. Accordingly, it will be bilateral Knife protrusions or dozer blades needed to cut out the tread width.

So far, the scraper container was made entirely of a welded construction, assuming that this was for great strength and rigidity are necessary. The manufacture of containers by welding is widespread themselves in the factories. The installation of certain other parts, such as the elevator, can be carried out by the customer are executed. The container takes up most of its space and is suitable for all practical uses most of the shipping cost for the container. This is a fact believed to be that he is prevented from extensive use, in particular of the utility scrapers Has.

As far as is known, there is no scraper that is particularly or specifically for a Loading is intended in a dismantled form, that is a form in which the various parts,

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finally the scraper container, 'dismantled and packaged in a compact, strapped or crated form to achieve maximum utilization of the space available for shipping.

The scraper according to the invention has a open container with laterally spaced walls, a main cutting knife, a Elevatorj to help fill the container and a bottom door which can be moved to an open position around the accumulated in the container Unload and spread earth or the like. A suspension is provided in which or over which the scraper on wheels in tandem arrangement rests with four wheels attacking the ground. Two wheels in a row are on one Swing arm or such a beam arranged on each side of the container. The vibrating beams are for independent pivoting attached to a common transverse axis so that the container is tilted about the axis or can be inclined to change the cutting depth

In a specific (particular) embodiment, each swing arm is supported on an axle part, which is telescopically received by a transversely directed housing which is located between the side walls of the scraper is attached. The axle sleeve or the stub axle are in the opposite ends of the Axle housing inserted and are available for attaching the swing beam or swing beam through the side walls of the scraper. The wheels taking up the load can vibrate due to the vibrating action of the beams or swivel. In addition, the tandem impeller arrangement distributes to achieve a more constant depth of cut the load over a larger tire area,

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the use of narrower tires is also possible. This increases the usable container width.

Another feature of the invention is an elevator design that addresses the problems the previously known designs is taken into account, where the drive train has an elongated length and is involved because of the position of the PTO shaft of the tractor opposite the gearbox of the elevator. In accordance with the aspects of the invention, the elevator drive on the ground is better than on the head, as it is known before. An elevator driven below or on the ground is in the floating one U.S. Patent Application Ser.No * 167,764, dated 05o July 197I described with the title "scraper elevator".

A feature of the invention is, as shown in the aforementioned application, that with the Drive on the ground a lower center of gravity is achieved. This is expressed in a more uniform way Elevator operation, because the weight of the elevator is closely concentrated on the digging line with the striving, to reduce the bending and beating of the elevator chains. This arrangement also holds the elevator flights better in engagement with the earth or other material during the excavation work. These and other benefits are described in the subject matter of the application, which is also implemented to a large extent in the invention and. The order is more directly applicable of the drive on the ground with the scraper with the result of an almost straight-line the PTO shaft of the tractor.

According to this aspect of the invention, the elevator has two parallel loading paths. A scaffold has a central support for the two

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Stretch, on, one of which is on each side of the container. This results in a double elevator, each conveyor line from the center of the container Clearance to allow access of the drive line to the elevator on the ground. As a result is the Input for the elevator gear box practically in an almost straight line starting from the tractor PTO, which means a great reduction in wear and tear the drive train and the maintenance problems works.

Another feature of the invention is a dual elevator outlet arrangement which permits the operator can better control the emptying and spreading of soil, etc. The arrangement provides a front, swingable or pivotable base door, which is in the closed Position forms a floor in the front part of the container, and a rear pivoting or swing door, which the rear part closes. The doors are through an operating linkage and a pair of hydraulic cylinders connected with each other. There is one hydraulic cylinder on each side of the tank and operates the double doors.

Another feature is the provision of an automatic blade cleaning device. One Push rod extends down the outside of the container and through the back of the space shield each side of the container. When operating the the Door actuating cylinder, the push rod is withdrawn, cleaning the corners of the knife where Earth, etc., seeks to be included.

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Another important feature of the invention is the provision of a plurality of bolted together Scraper parts, including the container, which are intended to be assembled without losing strength or stiffness. This results in an elevator assembly made up of parts which for dispatch in compact form in crates · packed, strapped or placed in containers be taken apart and taken apart a minimum of cubic feet of cargo space and the sumptuous cost to decrease. The execution allows a quick and relatively easy union, which by the buyer or user at the work site without special assembly equipment or fastening devices or fittings can be carried out.

These and other advantages are based on the following description of a preferred embodiment in conjunction with the drawings to better understand which schematically the example Illustrate embodiment of the invention.

Fig. 1 is a side elevation of a preferred embodiment of the four-wheel elevator scraper, which is towed by an agricultural tractor that has a hitch and PTO for has the force dissipation.

Fig. 2 shows a side view of the scraper according to FIG. 1, in which the dashed lines The open position of the two floor doors is shown.

Fig. 2 illustrates in cross section a part of the scraper container in section through the Axle housing of the impellers in tandem.

Fig. 4 leaves a view of the drive train between the tapping point on the tractor and the gearbox

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of the elevator.

Fig. 5 is a plan view of the scraper of Figs. 1 and 2 showing the lower drive and the shows wheels in tandem.

Fig. 1 gives a raising and Bucket Elevators' Scraper Io again, being pulled by a tractor 12th The tractor is a four-wheeled agricultural tractor with a Zugstangenanhange-device 13 and a power take-off or. PTO 14. The towing vehicle is not part of the invention. The scraper Io has a tongue-like protruding extension 15 which is pivotably attached to the trailer device 13 of the tractor, as a result of which the scraper can be pivoted relative to the tractor. The tongue 15 comprises a pair of arms 16 which project forward from the scraper side walls 18 and are connected at the front by a cross piece 19. On the crosspiece 19 there is a pair of lateral ones. Bearing bushes which are spaced apart from one another and are not shown, to which a neck extension 2o is attached, which results in a connection with the pull rod 13. A hydraulic cylinder 22, which is connected to the hydraulic system of the tractor 12, has an extendable rod 23 which is pivotally attached to an arm 24 which is attached to the crosspiece 19 so that after the extension or retraction of the rod 23 of the cylinder the extension approach 2o and the tongue arms 16 fold or pivot around the crosspiece 19 relative to one another. Here, the scraper container pivots about the main transverse axis 26 of the tandem running wheels in order to raise or lower the scraper knife 25. An elevator 32 is attached to the front of the scraper Io to remove loose soil

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or to pick up loose rock when the knife 25 is advanced when it is in the lowered position is located to aid in the filling of the container. The elevator embodies a design which are particularly suitable for smaller or medium-sized scrapers, as explained below, where the PTO shaft 14 of the tractor with the lower generally designated 34 drive of the elevator is connected via the drive train 36. The scraper Io rests on four wheels, two of which are on each side, one behind the other, and on wings

37 are mounted so that the rear wheels 39 on each side in line with the front wheels

38 are located. The tandem arrangement of the wheels is an important feature of the invention detailed below.

As can be seen in FIG. 2, the scraper container has a pair of lateral, spaced-apart walls l8 with a downwardly sloping front edge 40, a horizontal top edge 41 and a horizontal bottom edge 42, which in an outer curve upward into the rear Part 43 passes over. A fixed end wall 44 extends at the rear end between the side walls 18 and has a lower transverse edge 45, the effect of which will be described later. At the upper edge 41 of each side wall 18 a side board-like extension is attached which allows the soil to be piled into the container up to a level above the side walls 18 _/ at least up to the head of the elevator 32, as is the case during operation of elevator scrapers is common in practice. Between

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- Io -

the side walls 18 extends approximately midway between the front and the rear of the container and at the upper distance from the bottom edge 42 in the transverse direction an axle housing 48, which at the opposite ends via a gusset plate 49 (Fig. 3) on the inside of the inner walls 18 is attached. An axle link 50 is in each end of the axle housing 48 through the side walls 18 inserted and laterally spaced bearing bushes 51 stored in the housing, which is a from each other independent pivoting or swinging of the oscillating or pivoting arms 37 allows. Every swing arm or pivot beam 37 carries a front knuckle 52 at the front end and a front axle at the rear End of a steering knuckle 53 · on these steering knuckles the front and rear, ground-resting wheels 38 and 39 are attached.

The bottom surface of the scraper container is closed by a front door 56 (Pig · 2), the front edge 57 of which engages the rear of the knife carrier beam 58 and the rear edge 59 of which abuts against a rear door 60 which projects backwards and is curved upwards Part 62 ends, which generally follows the curvature of the edge part 43 of the side wall 18 and closes on the rear side with the bottom edge 45 of the end wall 44. The front door 56 is pivotally mounted on a pair of pivot pins 65 in the opposing side walls 18. A pair of skirt members 66, one of which is attached to each pivot pin 65, support the front door 56 for pivoting movement about the axis of the pins 65 from a closed position to a fully open position.

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as shown in dashed lines in FIG. The rear door 6o is pivotally attached to a pair of pivot pins 69 on the opposing side walls 18 at the rear above the pivot pins 65. A pair of arms 7o, one of which is supported on each pin 69, extends downwardly on the outside of the side walls 18 and is connected at the lower ends to the curved part of the inner door 66 so that the latter about the axis pivot 69 can pivot from a closed to a fully open position, as shown in dashed lines in FIG. An actuator rod 72, one on each side of the container, is pivotally mounted at 75 on the arm 7o and discharges forward where it is pivotally mounted at 74 on the lever 75 via a slide bearing on the rocking member 66 of the front door 56. Levers 16 connect the arms 70 of the rear door 60 to the piston rod 77 of the hydraulic cylinder 78 on each side of the scraper. Accordingly, upon actuation of the cylinder 78, retraction of the rod 77 swings the front door 56 and the rear door 60 back and forth about the pivot axes and moves them in the operation towards the fully open positions which are for each door in FIG are shown. The ratio of the curvature of the rear portion 62 of the door 60 to the bottom edge 45 on the wall 44 is such that

the edge 45 sweeps the inner curved surface of the door 60 or scrape off any sticky soil material when the door is opened. So the container has

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a double unloading capacity in such a way that the soil emerges from two places during the emptying process, firstly behind the cutter bar 58 and secondly near the center of the container between doors 56 and 6o. Unloading is controlled by the degree of opening of the doors.

As shown in Fig. 5, the main knife 25 and the knife carrier 58 extend transversely to the front of the container between the side wall extensions or the clearing blades 81, each of which has a laterally projecting part 82 which at the rear ends parallel to the side walls 18 and attached to these by bolts or screws 8j5. is. A push rod 85 or push rod protrudes through an opening 84 in the rear part 82 of each clearing blade 81, which is pivotably connected at the upper end 86 to a lever 87 (FIG. 2) which is attached to the rotatable bushing or sleeve part of the lever 75 is attached. Accordingly, when the cylinder 78 is actuated to open the doors, the pushrods 85 are extended downwardly by the blades 81 along a generally downwardly inclined line parallel to the knife 52 in an effort to loosen or remove any sticky material, which may have accumulated on the corners of the knife.

Referring to Fig. 5, the elevator 32 comprises two sections or parallel tracks 9 ^ - 95 *, one on each side of the container. Each section or each conveyor line 94-95 is supported by an elevator frame with a central support 9 ^> which has a support bracket 97 at the lower end, which carries the elevator drive 34 and has a cross piece 98 on the head. With distance

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a cross piece 99 is arranged below the upper cross piece 98, which engages through the middle support 96 which, together with the upper cross piece 98, carries the elevator sections 9 ^ - 95 transversely to the front of the container. Opposite ends of the cross pieces 98-99 are pivotally attached to the side walls 18 via links 90-91 (FIG. 2), which allows the elevator sections to move in a vertical plane. Each elevator section 94-95 comprises a pair of chains loo (indicated by dash-dotted lines in FIG. 5), which are guided over drive sprockets Ioj5 on the ground and over guide wheels Io5 on the head. The idlers are laterally spaced in line with the drive sprockets I03 on the floor and are mounted on a rotatable shaft I08, the opposite ends of which are supported in a pair of cantilever arms Io9 which protrude upward from the upper crosspiece 98 of the elevator frame. The drive sprockets I03 are laterally spaced in line with the idlers Io5 on drums or carriers Ho which have a central inwardly directed ring 112 which is fastened with bolts or to the drive hub 114 at each end of the elevator drive jj4. The seat post 97 carries the drive on the central housing 115, which has an input shaft with a U-joint II6, which is connected to the drive train 36. The drive ^ 4 in the preferred embodiment is a standard planetary truck axle. The planetary gear is arranged at each end, which is used to drive the two elevator sections 9 ^ - - 95 . The carriers Ho have an open cage structure to allow the escape of substances or soil,

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which may have the tendency to collect in the rotating beams. In this context are Slots 117 are provided. A number of driver strips or scrapers 118 are loo through the chains worn at each elevator section 94, 95, which on opposite sides of a central vertical plane by the elevator drive 54 distance from each other to have access to the powertrain 56 to form.

As can be seen from Fig. 4, the drive train 56 comprises a telescopic part 12o, which at one end with the PTO shaft 14 of the tractor via a U-joint 121 and at the opposite end with a second drive part 122 via a U-joint (universal joint ) 125 is connected. The last-mentioned drive part 122 is connected to the input of the elevator drive on the ground via a universal joint 116. The drive train 56 is located on the cross member 19 * which is carried by the tongue-like extension 15 and a pivot bearing 125 which can pivot in a vertical plane in order to be able to take into account the change in the angle formed by the drive train when the tongue-like arm l6 and fold or pivot the tongue extension 2o against each other when lifting and lowering the scraper knife. The bearing bush 126 in the upper end of the pivot bearing 125 has a pivotable arrangement on a transverse axis, many times allowing the lower elevator drive 56 to be displaced near the top and bottom. j) the telescopic drive part 12o, in cooperation with the joints 121-125, which are movable on all sides, allows the tractor 12 to swivel movements with respect to the scraper Io. As previously mentioned, one of the most significant features of the invention is an arrangement which enables the scraper to be removed in the disassembled 3098 50/0365

Condition can be shipped to be assembled from a scraper box containing all of the "parts." bundled together or packed together, which allows assembly at the job site by the Allows users without special devices or fasteners.

In this connection it should be noted with regard to FIG. 2 that the arms 16 of the tongue-like extension have thick or heavy side plates IJo on each side of the scraper side wall 18. In addition, on each side of a horizontal reinforcement rib with 1J52

or screws

Bolt / attached which is permanently attached to the side wall. The knife blade carrier 58 and the clearing blade 8l on the front corners of the side walls 18 are also bolted or screwed on, as explained above. The end wall 44 has an inwardly directed flange 137 * which is screwed to the side wall 18 at the rear. Between the Hauptabtragmesserträger 58 at the front and the end wall 44 to the axle housing 48 is located at the back part with the upper distance from the Bode "· and extending transversely to the container. The axle housing 1st with the opposite ends on the side walls on gusset plates 49 secured as 3 shows. Accordingly, the side walls 18 are held rigidly at a vertical distance. In addition, the tongue-like lugs 15 with the cross member 19 further stiffen the side walls and support their front ends 3, where the axle part 50 engages in the axle housing 48 and is held in this with the aid of a screwed-on outer tab 14o attached to the horizontal rib 132 is.

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By removing the tab l4o, the swivel arm 37 and the axle part 5o can be withdrawn from the axle housing will. It is then only necessary to remove the tongue attachment, the knife carrier 58 *, the axle housing 48 and unscrew the end wall .44 to collapse the side walls 18 of the scraper so that they are in can be shipped flat on its side.

Although a preferred embodiment of the invention is described and illustrated, although it is intended to be installed in a special device, deviations are possible and other uses can be found. Accordingly, the invention is not limited by the description and Drawing restricted.

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Claims (1)

Claims. 1.! Mobile scraper with an open container intended for filling with earth and the like, a cutting knife across the front of the container, an elevator inclined towards the front of the container to assist in the introduction of soil and the like in the container and a lower door (base door), which can be brought into an open position, To unload the earth or the like. From the container, characterized in that impellers in tandem on a transverse axis the container between its front and rear ends and support means of the wheels, one on each side of the scraper container is pivotable on the transverse axis and parallel to the front and rear Container unloads that four ground wheels or wheels acting on the ground are provided, of which two each on each side of the container and one in the front and the other in the back on each side Tandem arrangement are arranged on each wheel carrier, and that the had carriers about the transverse axis are independent of one another are pivotable, the scraper container about the axis when lifting and lowering the cutter and swivel to change the cutting depth. 2. Scraper according to claim 1, characterized in that the impeller arrangement has a transverse Axle housing lying to the container and a pair of axle parts, one of which is located in each Located at the end of the axle housing and protruding from the side of the container, and that the axle supports on the axle parts attached as well as retainer to hold the 309850/0365 Axis are provided against axial displacement while leaving the pivoting option. J>. Scraper according to claim 1, characterized in that the tandem arrangement of the running wheels comprises a transversely directed axle housing, which is attached between the side walls of the container at a distance from the floor, and an axle mounted in the axle housing and that the wheel arrangement comprises a pair of swivel arms or - bars, one of which is attached to the axle on each side of the container, a pair of stub axles, one of which is provided at each end of each pivot arm and has four ground-engaging wheels, two of which are arranged one behind the other on each side of the containerg attached to the stub axle. 4. Scraper according to one of claims 1 to 3 for towing by a tractor with a trailer device and a power take-off shaft, characterized by having a container spaced apart from one another Sidewalls, a main scraper between the sidewalls on the front of the scraper, a Elevator arrangement inclined towards the front of the container, which is located at the bottom at the front of the cutting knife can attack to fill the container with soil or the like. To support the Elevator device a pair of side by side on opposite sides of a vertical plane comprises elevator sections arranged in the center line of the container, one common to both elevator sections Drive on the ground or below with a power inlet in the above-mentioned level 309850 / 036B between the power take-off shaft of the tractor and the power input and a tongue-like, Approach for attaching the scraper, which is used for towing to the towing device of the Tractor, can be attached. 5 · Scraper according to claim k _s, characterized in that the elevator device includes an elevator frame (frame) with a central support, a crosspiece pivotably attached to each side wall of the container at the end of the support, an upper, driven shaft arranged above the crosspiece A pair of laterally spaced idler pulleys attached to the drive shaft on either side of the vertical plane, a drive shaft attached to the lower end of the center post, a pair of laterally spaced idler wheels on the drive shaft on either side of the vertical plane and in line with the Deflection pulleys or pulleys, a pair of elevator chains guided over each pair of chain wheels and idler wheels, and a plurality of driver webs attached longitudinally between the pairs of chains, which form two elevator sections on each side of the container. 6. scraper according to claim 5 # characterized that the drive train has at least one telescopic part between the PTO shaft of the tractor and the drive input of the elevator drive is arranged. 7 » Scraper according to claim 6, characterized in that the drive train comprises a first drive part, a universal coupling and a second drive part , the adjoining 309850/03 6 5 -ZC - the ends of the first and second drive parts through the universal coupling and swivel means. are attached to the tongue-like approach, which has a second drive part adjoining the universal coupling. 8. scraper according to claim 4, characterized in that the bottom of the scraper container is closed at the front and back by movable doors, the front door starting from the main cutting knife after the rear door extends, the rear door has a bottom portion extending from the rear edge of the bottom part extends to the rear of the front door, wall parts between the Side walls of the container are attached, which can attack the rear end of the rear door, a first transverse pivot axis at a distance above the bottom part of the front part, a second transverse pivot axis at a distance above the bottom portion of the rear door as well Actuating means for causing the front door and the rear door to pivot up and down are provided around the transverse axes * 9 · Scraper according to claim 8, characterized in that a clearing blade laterally outwards protruding from each end of the main cutting knife, a knife carrier the main cutting knife and the dozer blades carries a push rod into the side shields generally parallel to the main cutting knife on the Shields can be pulled out, and that actuating means operated together with the means actuating the door ·. are provided for reversing the push rod in order to remove adhering material in the area of the side shields. 3098 5 0/0365 lo. Four wheel scraper for towing by a tractor with a hitch and a power take-off shaft according to one of claims 1 to 9, characterized by a container with an open one front face, spaced side walls with a fixed rear, between the end wall attached to the two side walls, four wheels engaging the ground, two of them on each Side and of these one behind the other in tandem, one supporting the container on the wheels Suspension which swivels the wheels about an extending between the wheels Transverse axis allows a knife support beam or a golches supporting structure transversely to the lower face of the container, a cutting knife on the cutter bar, wherein the container is open at the bottom between the knife support beam and the end wall, a front door which opens at closed position forms a bottom on the front part of the container and pivots on the side walls is attached, a rear door which, when closed, has a floor in the rear part of the Container forms between the front door and the end wall and is pivotably attached to the side walls, Actuating means for pivoting the doors to open and close the bottom, one across the front of the container arranged elevator with two loading lines, one of which is on each side of the container located under "leaving a distance from the other, an elevator drive shaft on the ground with a Entrance between the two elevator lines and a • driving connection with each elevator line, one at one end connected to the one end of the entrance to the floor drive of the elevator on the floor 309 8 50/0365 strand, which can be connected to the PTO shaft of the tractor at the other end, one to the front tongue-like protruding approach of the scraper, which protrudes from the container side walls and a crossbeam for carrying the power train, an extension pivotably connected to the crossbeam at one end, vrelche at the other end with the hitch of the tractor at the other end can be connected as well Cylinders that can be controlled by the tractor, and with one end with the tongue-like extension and at the other end they are connected to the crossbeam. 11. A four wheeled scraper according to claim 10, characterized in that the knife support beam, the tongue-like approach and the end wall, each detachable, is attached between the side walls so that Allow disassembly of the container. 12. A four wheel scraper according to claim 11, characterized in that the suspension is a transverse axle removably attached between the side walls of the container, a detachable one on the axle Support on each side of the container to which the wheels are attached and on the side walls attached Lappen.umfasst, which an axial movement of the wheel supports or carriers relative to the Prevent axis. 13. Scraper according to one of the claims 1 to 12, characterized by the combination of a majority of parts comprising a body part of the scraper container with side walls, an end wall, a main knife carrier and a housing for a transverse axis, the side walls at the front by the knife holder or frame and at the Shepherd's side through 309850/0365 the end wall are laterally spaced from one another by flange means on the knife holder or beams and the end wall attached to the side walls and can attack! of holding means, which the side walls reach through and flange means for rigid attachment of the knife carrier or beam and the and End wall between the side walls, / of an axle housing, which is located between the side walls-in Distance from the ground between the knife support beam and the end wall lying extends and at opposite Has ends flange means as well as fastening means for fastening the flange means to the side walls, the side walls rigidly through the end sides the cutter bar and the axle housing are supported and a dismountable assembly or assembly of the container body. 14. A scraper according to claim 1J> ₃ characterized in that the combination comprises a tandem impeller assembly which comprises a pair of axle parts, one of which is inserted into each end of the axle housing through the side walls, a pair of swing arms, one at each of the Axle parts is attached and which forward and backward comprises, - unload opposite sides of the container, / wherein the body part, the four ground wheels, two of which are located on each side one behind the other, are attached to the _{swing arms /} and fastening means protrude on the outside of the side walls and a part of each swing arm cover and allow the removal of the wheels in tandem. 309850/0365 Blank page