US2190969A

US2190969A - Wagon scraper

Info

Publication number: US2190969A
Application number: US163418A
Authority: US
Inventors: William J Adams
Original assignee: Gar Wood Industries Inc
Current assignee: Gar Wood Industries Inc
Priority date: 1937-09-11
Filing date: 1937-09-11
Publication date: 1940-02-20
Anticipated expiration: 1957-02-20

Description

Feb. 20, 1940. w. J. ADAMS 2,190,969

WAGON SCRAPER Filed Sept. 11, 1937 3 Sheets$heet 1 INVENTOR W JA d a1; 23

Feb. 20, 1940. J, ADAMS 2,190,969

WAGON SCRAPER Filed Sept. 11, 1957 .3 Sheets-Sheet 2 INVENTOR W JAdcuns BY QMQQLW ATTORNEY Feb. 20, 1940' W. J. ADAMS WAGON SCRAPER Filed Sept. 11, 1937 5 Sheets-Sheet 3 INVE'NTOR Patented Feb. 20, 1940 UNITED STATES PATENT OFFICE WAGON SCRAPER v Application September 11', 1937, Serial No. 163,418

4 Claims.

This invention relates to large capacity tractor drawn Wagon or carrier scrapers and, particularly represents improvements and refinements over the structure shown in my Patent No. 2,010,801 dated August 13, 1935.

The improvements particularly deal with the construction, arrangement and operation of the rear door, the design of the side plates, the provision of a larger dirt discharge opening when the bowl is in a dumping position and the reinforcement of the bottom plate of the bowl; the advantages of these improved features over those of the original scraper being fully set forth and explained in the subsequent portion of this specification.

A further object of the invention is to produce a simple and inexpensive device and yet one which will be exceedingly effective for the purpose for which it is designed.

These objects I accomplish by means of such structure and relative arrangement of parts as will fully appear by a perusal of the following specification and claims. 7

In the drawings similar characters of refer ence indicate corresponding parts in the several views:

Figure 1 is a side elevation of a scraper in a digging position.

Figure 2 is a sectional elevation of the scraper in a carrying position.

Figure 3 is a similar view of the dumping.

Referring now more particularly to the characters of reference on the drawings, the frame of the scraper comprises a pair of side beams I connected at their front end by a cross beam 2 from which a tongue 3 projects forwardly. The front end of the tongue has a swivel element 4 for connection to a tractor so that the frame is supported against vertical movement at that end. The rear ends of the side beams, which slope down somewhat from a point rearwardly of the cross beams, are rigidly connected by a cross shaft 5. Outwardly projecting trunnions 6 are mounted on the beams 1 near their rear ends on which either wheels 1 or the frames of endless track units may be mounted as operating conditions may require.

Turnable on the shaft 5 between the side beams is a sleeve 8 which is rigidly welded onto the bottom plate 9 of the main bowl adjacent the rear end of said plate. This bowl has side plates Ill rigid with the bottom plate, which extend below the bottom plate sufliciently to engage the sleeve 8 and also the sides of a heavy long block ll.

scraper as This extends under and braces the bottom plate 9 from ahead of its front end some distance and carries the scraping blade l2. The back edges of the side plates are disposed at substantially right angles to the bottom plate 9 while their forward edges slope forwardly some distance and then rearwardly tothe top edges E, which slant down at an angle relative to the bottom plate to their junction with the backedges.

The bowl tilting mechanism comprises a pair of substantially horizontal hydraulic cylinders l3, one on each side of the bowl. These cylinders are pivoted at their forward end on the beams I intermediate their ends and ahead of the trunnions 6. Piston rods M project from the rear ends of the cylinders and are pivoted on rigid arms l5 intermediate the ends thereof. These arms are disposed between the side plates and the beams I, being welded against said plates, and are rigid both longitudinally and laterally of the bowl.

These arms branch at their lower ends so as to engage the sleeve 8 and also a cross channel [6 which extends under and supports the bottorn plate 9 between the sleeve 8 and the block II, the arms being welded to the sleeve and channel. A positive controlling movement is thus imparted to the bowl without any direct strains being placed on the relatively thin side plates themselves and without any possible distortion oi the bowl.

1 at the back of the bowl at the top, and which was necessary with my previous scraper, is therefore eliminated, giving advantages which will be seen later. Also the bottom plate of the bowl is strongly reinforced against buckling by the block II, the channel 16, and the sleeve 8.

The rear closure or door for the bowl comprises side wings l'l disposed closely inside but projecting rearwardly beyond the plates l0. These wings are pivoted on said plates intermediate their ends and intermediate the top and bottom at points ahead of the arms l5 as shown at l8, and the back plate [9 forming-the door proper is curved concentric with the pivots l8 and adapted at its lower end to rest on the bottom plate 9 at its rear end rearwardly of shaft 5. It will be noted that the pivots l8 are nearer the top of the bowl than the bottom, so that the lower portion of the curved door plate has a considerable forward slope. This gives it a relatively large dirt retaining capacity as compared with the door in the original scraper.

The top edges E of the rear portion of the wings, when the plate I9 is resting on the bot- The need for a cross brace tom plate of thebowl, form a straight line ex door opening clearance.

'wardly of the main bowl plates as at 22.

tension of the top edges E of the bowl plates as ance may be had when the door is in a wide open I dumping position. At the same time the advantages of the original door construction are retained, with respect to themwings being partly enclosed and protected by "the bowl, and being automatically lifted by outside means. By reason of the relatively high pivot points of the door as previously stated, not only will it, itself, carry a certain amount of dirt,v thus in. effect increasing the length of the bowl, but it allows for a greater percentage of dirt being carried rearwardly of the bowl pivot shaft 5 than was previously the case. This'gives a better balance of the loaded bowl, requiring less power to raise and dump the load.

By eliminating the previously mentioned cross brace I have been able to reduce the height of the side plates of the bowl at the rear and which was previously necessary to allow for sufficient The previous 'side plates, however, werethus necessarily too'deep (with relation to the width of the bowl) for easy loading of the dirt. It might be argued that it is not necessary to load the bowl to this excessive depth, but the tendency of the operators isto use the top edges of the bowl as a load gauge line. As a consequence the scraper and tractor were over-strained in an endeavor to manipulate this actually excessive load. 7

As in the originah scraper the rear door is opened only after the bowl has been raised to a carrying position and is being further swung toward the dumping position. This opening of the door is effected by normally slack cables 20, one on each side. Theseare anchored at their forward end in connection with the frame beams l and extend over pulleys 2i mounted on the arms l5 at the top, and then down to a connection with the wings" at the bottom and rear- The opening movement of the rear door thus takes place in the same manner as in the previous structure. However, the pulleys 2| being on the relatively heavy rigid arms 15 instead of on the bowl itself, no strain is placed on the latter with the opening of the door. Also by the present position of the pulleys relative to the door pivot, a faster opening of the door is obtained than was previously the case.

As in the original scraper I have also provided a front dirt carrying apron or auxiliary bowl. This comprises side plates 23 which at therear overlap the side plates l0 and extending some distance forwardly therefrom, and a front and bottom plate 24 the upper front portion of which is curved while the lower bottom portion is straight and terminates in a blade 25.. 'The plates 23 and I0 are pivoted together near the top as at 26 and the plates 23 are provided ahead of the pivots and on the outside with rollers 21 adapted to ride on horizontal tracks 28 fixed on the beams I. The top edges E" of the front apron sides are disposed with a downward slope to the front from the point where they normally overlap or intersect the bowl plates l0 and are on a converging slope relative to the bottom portion of the plate 24.

As in the .original scraper, the rollers 21 ride on the tracks when the bowl'isin a digging position as shown in Fig. 1 and theb1ade25 is then above ground level and also ahead of the scraper blade l2 a certain distance. The side plates 23 then substantially form a closure between the blade Ziand the plates. .10 at ground leveL preventing :the dirt as scraped from spilling out laterally inthe gap otherwise formed between the blades 2:5 and I2.

to a carrying position the blade'25 engages and As the bowl is swung up rests on the blade l2 and provides a closure therewithas shown in Fig. 2 so that all the dirt loaded is retained.

When the bowl is in a digging position and the front apron is in a dirt receiving position the top loading to capacity by reason of the elimination of any brace across the bowl at the rear, is an relative to the width of the scraper for easy I important factor in enabling the bowl to be properly loaded. This is because practically all types of dirt when scraped up tend to hump substantially at the center of length of the mass of dirt.

With this new bowl construction therefore the.

side plates of the various cooperating parts of the bowl may be made sufliciently low" at all.

points so that there is no tendency to overload the scraper. At the same time the'desired slope of the top edges of the dirt enclosing structure,

when in carrying position, is provided which substantially conforms to the slope normally as Any spilling of the.

sumed by the loaded dirt. dirt at its peakand which occurred with the original scraper is thereforeprevented. I

From the foregoingv description it will 'be readily seen that I have produced such a device as-' T:

substantially fulfills the objects'of the invention as set forth herein.

While this specification sets forth in detailthe present and preferred: construction of the de-' vice, still in practice such deviations from such detail may be. resorted-to as do not form a departure from the. spirit of the invention, as defined by the appended claims.

Having thus described-my invention, what I claim. as new and useful and desire to secure by Letters Patent is:

1. A scraper comprising a frame supported.

from the ground, a'bowl having side plates and'a bottom plate, a transverse member under and,

rigid with the bottom plate, means 'prvotally supporting said member wherebythebowl my swing between scraping and dumping positions-aboutthe member as an axis, side'arms rigid with the side plates on the outside upstanding from and rigid with said member, means to swing the bowl applied to said-arms, another transverse member extending under and reinforcing the-bottom plate ahead of said first named member and rigid branches-extending forwardly from the arms intermediate their ends and rigidly secured to the endsof said other transverse member.

2. A scraper comprising a frame supported from the ground, a bowl having side plates, means pivoting the bowl on the frame for swinging movement between scraping and dumping positions', side arms rigid with the side plates extending upwardly from the pivot points of the bowl, a normally closed rear door for the bowl. having side wings overlapped by the side plates, means pivoting said wings on the plates, means to swing the bowl applied to said arms intermediate their ends, and means causing the door to open with swinging movement of the bowl beyond a carrying position and including cables at the sides of the bowl and door, means anchoring the front and rear ends of the cables on the frame and door respectively, and pulleys on the arms above the point of application of the swinging means and engaging the cables intermediate their ends.

3. In a scraper, a main bowl having a bottom and side plates, a front apron having a bottom and side plates overlapping and projecting forwardly from the side plates of the bowl, means pivoting the overlapping portions of the side plates of the bowl and apron together, the apron forming a closed forward extension of the bowl when the latter is in a carrying position and means acting on the apron to dispose the rear end of the bottom 0! the same spaced ahead of and above the bottom of the bowl when the latter is in a digging position; the top edges of the side plates of the bowl and apronbeing cut so as to be substantially parallel to each other when the apron is in the latter position and so as to slope downwardly from their point of intersection when the bowl and apron are in carrying position.

4. A scraper comprising a frame supported from the ground, a bowl, means pivoting the bowl on the frame for swinging movement between scraping and dumping positions, side arms rigid with the bowl extending upwardly from the pivot points of the bowl, means to swing the bowl applied to said arms, a normally closed rear door for the bowl, means pivoting the door intermediate the top and bottom thereof on the bowl for opening movement in an upward direction and means to thus move the door with the swinging i movement of the bowl beyond a carrying position over which the cable passes intermediate its ends.

WILLIAM J. ADAMS.