US1811030A

US1811030A - Excavating and scraping apparatus

Info

Publication number: US1811030A
Application number: US367863A
Authority: US
Inventors: Allan B Shaw
Original assignee: WESLEY C SHAW
Current assignee: WESLEY C SHAW
Priority date: 1929-06-03
Filing date: 1929-06-03
Publication date: 1931-06-23
Anticipated expiration: 1948-06-23

Description

June 23, 1931. A. B. SHAW 1,811,030

EXCAVATING AND SCRAPING APPARATUS Filed Jun 3, 1929 2 Sheets-Sheet 1 June 23, 1931. A. B. SHAW 1,811,030

EXCAVATING AND SCJRAPINGr APPARATUS Filed June 3, 1929 2 Sheets-Sheet 2 35 described and Patented June 23, 1931 UNITED STATES parent @FFKCE ALLAN Renew, or DELAWARE, OHIO, ASSIGNOR. 'ro WESLEY o. SHAW, on DELAWARE, onro EXCAVATING AN D SCRAPING APPARATUS Application filed June 3, 1929. Serial No. 367,863.

This invention relates to improvements in excavators or scrapers of the wheeled type and which is adapted for the connection with a motor unit such as a tractor or the like for drawing or pulling the same during the scraping operation and for transporting the earth which has been removed thereby.

' An object of the invention lies in the provision of a scraper having a bucket which is arranged in a novel manner within the scraper frameso that the scraping edge of the bucket may engage with the ground to any regulated depth desired and is maintained at such depth by the weight of the bucket.

Another object of the invention is to provide a hoisting apparatus upon a tractor unit for elevating the bucket together with simple means for dumping or unloading the bucket.

A further object is to form the scoop or bucket with open ends, the front end of which is to load the scraper and the rear end for unloading the same.

A still further object resides in the provision of a scraper which is of strong and durable construction and which is exceedingly efiective in accomplishing the purpose for which it is designed.

With these and other objects in view which will appear as the description proceeds, the invention consists in the novel features of construction, combinations of elements and arrangement of parts hereinafter to be fully pointed out in the subjoined claims.

In the accompanying drawings:

Figure 1 is aperspective view of the scraper comprising the present invention showing the same connected to a tractor in an operative position,

Figure 2 is a vertical sectional view taken through the scraper unit,

Figure 3 is a detailed vertical sectional view of the adjusting means for the scoop,

Figure 4 is a detailed view showing the connection between the scraper and the rear of the tractor,

Figure 5 is a vertical longitudinal section to 'al view taken through the hoisting mechanism positioned upon the rear end of the tractor,

. Figure 6 is a transverse vertical sectional View taken on the line 66 of Figure 5,

Figure 7 is a similar view taken on the line 77 of Figure 5,

Figure 8 is a perspective View friction'disk and bracket used in connection with the hoisting apparatus,

Figure 9 is a fragmentary view taken on the line 99 of Figure 5 showing clutch engaging teeth of the hoisting drum.

Referring more particularly to the characters of reference on the drawings, the numeral 1 designates in general a tractor which may be of any well known type and includes the frame 2, the wheels 3 and the drivers seat 4. The numeral 5 denotes the scraper connected to the tractor to be drawn thereby by a drawbar ti to which the front end of the scraper is connected by means of the usual pin and socket connection 7, commonly employed in connection with implements of this character. The frame 8 of the scraper comprises a pair of side members 9 and 10 between which the scoop is positioned and mounted for vertical movement. Extending crosswise of the rear end of the frame 8 and journaled within the members 9 and 10 is a shaft 11 upon which are freely mounted a pair of wheels 12 and 13 which serve to support the scraper.

Carried by the frame 8 and extending lon gitudinally thereof is a pair of upright inverted

U-shaped supports

14 and 15 which have their lower ends connected to the frame 8 in any suitable manner and spaced at their upper ends by means of a transversely positioned bar 16. Pivotally .connected to the rear legs of the

supports

14 and 15 is the scoop 17, which has its front end provided with a' scraping edge 18. This scraping edge is in the form of a bar positioned under the edge of the scoop and provided with a pair ofbevelled cutting edges 19 and 20. The bar case one of the edges should become dulled or damaged.

- which carry adjusting screws 25.

To further strengthen the scoop at its lower forward end, the bar has its ends bent upward as indicated at 21 to conform to the shape of the scoop and which together with the

channel members

22 and 23 carried by the sides of the scoop, will serve to prevent spreading of the scoop when subjected to great stresses and strains.

In order to regulate the cutting depth of the scoop, the channel member 22' has secured thereto at each side of the scoop brackets 24 These screws engage the frame members 9 and 10 and is turned to increase or decrease the inclination of the scoop which is normally supported so that the cutting edge of the bar 18 will dig into the surface as the scoop is drawn forwardly by the pulling tractor. The side walls of the scoop are formed at their rear edges with recesses 26 so that the walls will clear the shaft 17 when the scoop is in its extreme lower position.

Arranged to the front and rear of the scoop and to the open ends thereof are

end walls

27 and 28, which are positioned transversely of the scraper frame and rigidlysecured to the

uprights

14 and 15, the said end walls serving to close the ends of the scoop 17 when the latter is loaded and elevated to a carrying position of the contents within the scoop.

In order to elevate the scoop within the frame 8, the intermediate portion of the channel 22 has mounted thereon a pulley 29 which is in alignment with a pair of

pulleys

30 and 31 carried by the transverse member 16. Trained over these pulleys is a cable 32 which has one end thereof secured as at 33 to the channel member 22 and the other end leading to a hoisting unit 34 mounted on the rear portion of the tractor frame 2. The cable 32 passes rearwardly from the unit 34 over pulleys 30, downwardly over the pulley 29 and upwardly over the pulley 3l and again downwardly to its fastening upon the channel 22. By this arrangement of the pulleys and Winding of the cable, the scoop. may be eas ly lifted with a full load from engagement with the ground. A

The hoisting unit 34 comprises a shaft 35 which is clamped within bearing caps 36 mounted upon the upper surface of the frame 2. Rotatably mounted upon one end of the shaft is asprocket 37, which is in operatlve alignment with a sprocket 38 mounted upon the power take-ofi' shaft 39 of the tractor. Trained over the

pulleys

37 and 38 is an endless chain 40 through which the power 1s transmitted to the hoisting unit 34. Also mounted for rotation upon the shaft 35 is a drum 41 to which the end of the cable 32 is fastened and wound around to raise and lower the scoop. The drum is preferably cast in one piece and has formed at one end thereof a chamber 42 formed by the provision of the wall 43 and a collar 44. Bolted or otherwise secured to the collar 44 is a plate 45 which is mounted for rotation with the drum and positioned between the enlarged end 46 formed upon the sleeve 47 and a stationary disk 48 carried by the bracket 49 which is rigidly carried by the tractor frame 2. Connected to the sleeve 47 and mounted upon the bracket 49 is an operating lever 50, by which the sleeve 47 may be slid longitudinally of the shaft 35 so that the enlargement 46 of the sleeve will engage with the wall 43 of the drum. This will cause the drum 41to slide towards the sprocket 37 and engage the clutch faces 51 and 52 with one another thereby causing the drum 41 to rotate in unison with the driving sprocket 37. Also formed with the drum 41 is an annular section 53,

which has its exterior surface formed with ratchet teeth 54. Engaging the ratchet teeth 54 is a pivoted dog 55 which serves to hold the drum from rotating after the same has been disengaged from the sprocket 37. It will be noted by referring to Figure 5 that the teeth 54 are of considerable width to permit the dog 55 to engage the said teeth even though the drum is slid longitudinally of the shaft 35. The dog 55 may be formed with an extension 56 by which the same may be manually operated so as to disengage the teeth 54 in order that the scoop may be lowered to dump its load. To check the rapid rotation of the drum, the same may be moved longitudinally of the shaft 35 through the action of the lever 50 and thesleeve 47, so that the plate 45 will frictionally engage the disk 48. As the sleeve 47 is held from rotation by the key and slot construction 57'it will be seen that the enlargement 46 will engage the inner face of the plate 45 so that a braking action is set up between the plate 45 and the two inner surfaces of the enlargement 46 and the disk 48, respectively. Thiswill act as an eificient brake and permit thescoop to be lowered slowly into engagement with the ground. One of the features of the scraper is that the scoop is dumped from its elevated position as shown in Figure 2, through the open rear end thereof in a direction rearwardly from the line of travel. As the rear .end wall is mounted stationary on the scraper frame and positioned interiorly of the scoop 17, it will be seen that when the scraper scoop -is elevated so that the rear edge thereof moves away from the lower edge of the wall 28, a gap is provided through which the contents of the scoop will fall during the emptying operation.

It will be noted by referring to Figure 1 that the bottom wall of the scoop projects to the rear of the wall 28 when in a lowered position, permitting the rear end of the scoop to stay closed even though the scoop is ele vated so that the front end thereof is even with the lower edge of the wall 27 When in this position the scoop is closed at both ends and the contents thereof may thus be transported to its place of disposal without the danger of spilling the material.

Although the hoisting unit has been illus trated coupled up with the power take-off on the left side of the tractor, it will be understood that by turning the same to a position end for end it may be adapted to tractors having the power take-off on the right side thereof. As the hoisting mechanism is located to the rear of and adjacent to the drivers seat the same can be readily operated to raise or lower the scoop for loading, transporting or dumping.

From the foregoing description taken in connection with the accompanying drawings, it will be seen that there is provided an excavating and scraping apparatus which is of a durable and strong construction, capable of withstanding hard usage and one which fulfills the objects for which it is designed.

It will be obvious that various changes in the size and shape of the different parts, as well as modifications and alterations may be made within the scope of the appended claims.

What is claimed is:

1. In an excavating and scraping apparatus, a frame, an open ended scoop havin one of its ends pivoted to said frame, en

walls for said scoop stationarily carried by said frame, said end walls normally serving to close the ends of said scoop when in a carrying or loaded position, and means for tilting said scoop into an angular position away from said end walls so that the scoop may be emptied through one of its open ends.

2. In an excavating and scraping apparatus, a frame, a shaft at one end of said frame, wheels on said shaft, an open ended scoop pivoted to the rear end of said frame, stationary end walls for said scoop positioned transversely of said frame, the rear one of said end walls being positioned within the pivoted end of said scoop, whereby said rear wall serves to close the end of the scoop during the loading thereof and together with said front wall also serves to retain the scoop closed during the transportation of the material within the scoop.

3. In an excavating and scraping apparatus, a frame, wheels for support-ing one end of said frame, an open ended scoop pivotally carried by said frame, stationary end walls for said scoop carried by said frame, and normally positioned substantially at right angles to the bottom of said scoop, means for limiting the downward movement of said scoop, and means for raising the front end of said scoop so that the bottom thereof will take an angular position and move away from said end walls so as to open the ends of said scoop.

4. In a scraper, a frame, means for supporting the frame spaced from the ground,

an open ended scoop pivoted at one end to the rear portion of said frame, a wall for the open pivoted end of said scoop stationarily carried by said frame, and serving to close the end of the scoop during the loading thereof and means for raising the scoop at its front end so that the bottom of the scoop becomes spaced from said end wall.

5. In a scraper, a frame, wheels for supporting said frame upon the ground, an open ended scoop having one end pivoted to said frame, a cutting edge on the other end of said scoop, means for adjusting the cutting depth of said edge, a stationary wall carried by the frame and positioned within the pivoted end of said scoop and at substantially right angles thereto, whereby the pivoted end of the scoop remains closed during cutting or loading thereof but will become opened when said scoop is raised to an acute angle with respect to said wall.

In testimony whereof I affixrmy signature.

ALLAN B. SHAW.