US1882629A - Power driven loader - Google Patents

Description

Gfl. ii, 1932. w JAMES 1,882,629

POWER DRIVEN LOADER Filed Feb. 27, 1932 2 Sheets-Sheet 1 Frederic W INVENTOR' ATTORNEY Oct. 11, 1932. F. w. JAMES 1,882,629

POWER DR IVEN LOADER Fild Feb. 27. 1952 2 Sheets-Sheet 2 i" ii W 5! Fredefl c W.Jam

INVENTOR i1; ATTORNEY Patented Oct. 11, 1932 UNITED STATES FREDERIC W. JAMES, OF BELLEVILLE, -NEW PATENT OFFICE JERSEY, ASSIGNOR TO N. P. NELSON m! 1 p WORKS, INCL, 0F PASSAIC, NEW JERSEY, A CORPORATION OF NEW JERSEY POWEB' DRIVEN LOADER Application filed February 27, 1932. Serial No. 595,470.

This invention relates to a. power driven loader embodying in its construction an endless bucket elevator, spiral feeding device and scraper attachment, and the invention has for its object to provide. certain improvements in the scraper attachment. A loading apparatus of the character hereinafter described is one which is particularly well adapted to handle gravel, sand and loose dirt, and the problem which presents itself in this class of work, is one involving an efficient arrangement and manipulation of the scraper attachment disposed directly behind the spiral feeder and conveyor.

7 The problem has been elfectively solved in the present invention which, briefly stated comprises a scraping shield suspended on adjustable pivot points carried on a pivotally supported elevator boom, and a set of tracks rigidly supported on the frame of the tractor against which the shield is supported and guided with respect to the relative position of the elevator boom and spiral feeder.

Loading machines of this character are frequently used in road work for stripping old macadam prior to laying improved pavements, and in such service the progress of the loader is frequently halted by overhead electric wires and similar obstructions, under which the boom must be lowered to allow the loader to pass. In existing arrangements the uncoupling of the scraper pushers from the chassis causes additional delay, and the neces: sity of coupling them up again before the loader can resume its operations affords an additional interruption to the progress of the work.

In the present invention however, the scraper abuts against the chassis but is not connected to it so that the boom may be lowered Without delay. The tracks receiving the scraper rollers are so profiled that as the boom is raised again the rollers fall automatically against them, bringing the descendin g shield at once into operative position with a great saving of time and labor.

As the pressure of material against the scraper is considerable, rollers are employed to reduce the friction between theshield and the abutment. It is obvious that the rollers might be mounted on the chassis and the.

tracks on the shield without departing from. the principles of the present invention.

One embodiment of my invention is de-- scribed in the following specification, set forth In the appended claims and illustra-.

tively exemplified in the accompanying drawings, in which, Figure 1 is a side elevational view of the feeding end of a loader in working position; Figure 2 is anenlarged detail side elevational view of the track, shield and adjustable support therefor; Figure 3 is a side elevational view of the loader intransporting position; and Figure 4 is a perspective view of the feeding end ofthe loader and the scraper attachment.

' Referring to the drawings, 10 denotes a end thereof a foot shaft 16 issupportedin rigid brackets 17 projecting forwardly and. beyond the boom 14. The shaft 16 at its midportion carries the sprockets 18 over' which the chains of the bucket elevator 15 are guided. The outer portions of the shaft the sprockets 18 are provided with the superstructure and at the feeding,

beyond radial arms 19 su porting the spiral arranged blades.

,20 of the feeding mechanism.

Each arm 17 is an angular rod, carrying a bearing 21 at its outer end to receive the shaft 16. and being directed inwardly towards its.- other' end where the latter is rigidly attached 'to one side of the boom 14.

Swinging from the sides of the boom 14 adjacent the feeding end thereof is a scraper- 22 comprising a plurality of angle bars 23, each spaced from the other and provided with an eye 24 at its upper part adjacent each end to receive a pin 25 of a crank arm 26, the

latter being fixed on a rock shaft 27 projecting transversely across the boom. Each bar 23 is angular with one arm terminating in the eve 24, while the other arm projects forwardly,

as illustrated in Figure 2. The for- 1 ward sides of the bars 23 support an angular plate 28 which forms a shield disposed directly in back of the spiral feeder blades 20. The lower forward end of the shield 28 carries a plurality of spaced upright bolts 29, which are arranged to project through slots 30 in a scraper blade 31 adjustably carried by the shield, and which are provided with nuts adjustable thereover to clamp the blade 31 firmly to the shield.

The rock shaft 27 is controlled in its move ments by a segmental worm gear 32 fixed on the shaft and in mesh with a worm 33 turning with a hand wheel shaft 34, the latter being journaled in bearing plates 35 mounted on the side wall of the boom. The control end of the shaft 34 is disposed adjacent the operators platform and provided with a hand wheel 36.

The back of the scraper 22 is provided with two brackets 37 projecting from each of the outside angle bars 23, the brackets being rigidly held by a bridge piece 38 fixed at its opposite ends to the brackets 37. The brackets support a roller shaft 39 which carries a pair of rollers 40, each thereof being disposed to ride over a track 41 arranged at the front end of the tractor frame. The tracks comprise upper and lower angle bars 42 fixed at their inner ends to the tractor frame, as illustrated in Figure 2 and adapted to carry upright plates 43 at their forward ends. Each plate 43 supports a track 41 which is angular, the upper arm being the shorter and projecting at an abrupt upward and rearward inclination, while the lower arm is disposed in a downwardly and rearwardly inclination.

It will be seen that in operation, the scraper 22 is rigidly supported at any elevation between the'upper and lower extremities of the tracks 41 by contact therewith of therollers 40. In the transporting position of the loader, as illustrated in Figure 3, the scraper hangs in depending position from the pins 25 so that when the boom is lowered, the rollers will engage the upper arms of the tracks and automatically bring the scraper into operating position with respect to the spiral feeders 20. The shield plate 28 is cut away at its mid portion to accommodate the pickup end of the bucket elevator, but its lower edge serves as a scraper to gather up such loose material as escapes the feeder and to return it to the spirals.

The present construction is not only extremely simple in design, but exceedingly efficient in operation, because it automatically adjusts itself with any alteration in the working position of the boom and with respect to the spiral feeding and conveying members. If it becomes necessary to raise or lower the shield during operation of the loader, the hand wheel 36, shaft 34 and worm 33 are rotated so as to move the worm gear 32 and crank arms 26 and with them the bars 23 and plate 28.

Having now described my invention and the manner in which the same operates, what I claim as new and desire to secure by Letters Patent, is: v

1. In a loading device of the character described, a pivoted boom having an elevatin conveyor with transversely arran ed spira feeders at the pickup end thereo a transversely disposed scraper pivotally supported from the feed end of the boom, and fixed abutments free of the scraper for limiting the rearward movement of the latter under resistance from the material encountered.

2. In a loading device of the character described, a pivoted boom having an elevatin conveyor and transversely arranged spira l feeders at the feed end, a transversely disposed scraper pivotally suspended from the feed end of the boom and behind the feeder, and abutments free of the boom or scraper for limiting the rearward movement of the scraper when being crowded into the material to be loaded.

3. In a loading device for a motor vehicle, a boom pivotally mounted upon the vehicle and carrying an elevating conveyor, transversely arranged spiral feeders for gathering material and deliverin it into said conveyor, a transversely dispose scraper pivotally suspended from said boom behind said feeders, and an abutment fixed on said vehicle in position to limit the rearward motion of the scraper when crowding into the material to be loaded.

4. In a loading device for a motor vehicle, a boom pivotally mounted upon the vehicle and carrying an elevating conveyor, transversely disposed spiral feeders arranged to gather material and to deliver it into said conveyor, a transversely disposed scraper pivotally suspended from said boom behind said feeders, means for adjusting the elevation of said scraper with respect to said feeders, and an abutment fixed on the vehicle in position to limit the rearward motion of the scraper about its pivotal support.

5. A loading device as claimed in claim 4 in which the means for adjusting the elevation of the scraper comprises a worm driven gear, a shaft disposed transversely of the boom, and a crank arm on each end of the shaft pivotally supporting the scraper at its upper edge.

6. A loading device as claimed in claim 4. including anti-friction means between said scraper and said abutment.

7. A loading device as claimed in claim 4, in which the abutment comprises a profiled track to retain the scraper in operative position and including a roller supported at each end of the rear of the scraper to come into rolling engagement with said track.

8. A loading device as claimed in claim 4:

in which the means for adjusting the elevation of the scraper comprises a worm driven gear, a shaft disposed transversely of the boom and driven by said gear, a crank'arm on each end of the shaft pivotally supporting the scraper at its upper edge and in which the abutment comprises a profiled track engaging a roller to prevent backward movement of the pivoted scraper.

9. A loading device of the character de scribed having a chassis, a conveyor boom pivoted on said chassis, and a transversely disposed scraper pivotally supported from the feed end of said boom and abutting against said chassis but not attached thereto.

10. A loading device of the character described having a chassis, a conveyor boom pivotally mounted on said chassis, and a transversely disposed scraper adjustably and pivotally supported from said boom and abutting against said chassis but not attached thereto.

11. In a loading device of the character described having achassis, a pivoted conveyor boom mounted upon said chassis, an adjusting mechanism carried by said boom adjacent the feed end thereof, and a transversely disposed scraper pivotally supported from said adjusting mechanism and abutting against said chassis but not attached thereto.

In testimony whereof I afiix my si ature.

FREDERIC W. J S.

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