US2380986A

US2380986A - Elevating scraper

Info

Publication number: US2380986A
Application number: US522041A
Authority: US
Inventors: George W Mork
Original assignee: Bucyrus Erie Co
Current assignee: Caterpillar Global Mining LLC
Priority date: 1944-02-12
Filing date: 1944-02-12
Publication date: 1945-08-07
Anticipated expiration: 1962-08-07

Description

Aug. 7, 1945. s. w. MORK ELEVATING SCRAPER 2 Sheets-Sheet 1 Filed Feb. 12, 1944 IN VEN TOR.

AHURNFIS.

s- 1945- G. w. MORK 2,380,986

ELEVATING SCRAPER Filed Feb. 12, 1944 2 Sheets-Sheet 2 J a J9 47;. O I o 4 8 JO- 0 40 o 49 BY26 W AJTORNHS.

Patented 7 1945 2 2 UNITED"; STAT 1 PATENT lorries 1 assaaae nnrs'i irlsnrms Appli i gm Rois-22.11;! I 7 My invention relates to'new and useful improvements in elevating scrapers.

The tractor-pulled earth-moving scraper is now well known in the art. Such scrapers have,

for many purposes, replaced the combination of a power-shovel or drag-line excavator-with a fleet of dump-trucks. x

But, asfthe use ofsuch scrapers has gradually been extended to longer and longer hauls,

-- the inefliciency of using dissins equipment to haul, and hauling equipment to dig, has become the description progresses.

more and more evident; Moretractive force is needed for digging than for hauling, and the use of My invention consists in the novel parts and a in the combination and arrangement thereof, which are defined in the appended claims, and

of which one embodiment is exemplified in theaccompanying drawings, which are hereinafter particularly described and explained.

Throughout the description the same reference number is applied to the same member or to similarjmembers.

Figure 1 is a plan sinsp i r Figure 2 is a side elevation of my scraper, in carrying position.

view of my scraper in dig- Figure 3 is a side elevation of the same scraper,

in digging position.

provement of the traction device'with eitherof The best that has been suggested in the past Figure 4 is a front elevation of the sa scraper.

Figure 5 is a side elevation of the same scraper, in elevated dumping position.

Referring to the figures, we see that the main' frame of my scraper comprises two side-beams II, a cross-beam l2, a'draft to ue l3, 'four, vertical beams l4, l5, and a top cross beam I6.

The main frame is supported on two wheels to meet this situation has been to use two fraction elements, one pulling and the other pushing the scraper. The pulling element is primarilydesigned for running over roads; .one of these is permanentlyattached-to each scraper, sometimes even being built-in. The pushing element is primarily designed to supply. tractive force during digging: one such element usually serving several scrapers.

But it will readily be seen, that this espedient.

only partially solves the above-recited problems. Accordingly it is the principal object of -my present invention to devise a scraper which can elevate to dump into a truck.

The advantages of digging by scraper can thus be retained. The scraper and its hauling tlRc-fl tor can be built with but one end in view, namely, eflicient digging, rather than as a compromise between digging and carrying; And the carry- IT, or other equivalent means.

' An auxiliary frame, comprising two sidebeams l8 and a cross-beam I9, is pivoted low down on the main frame on transverse horizontal pivots 20.

A second auxiliary frame, comprising two sidebeams' 2|- and a cross-beam 22, is pivoted high up on the mainframe 0n transverse horizontal pivots 23. d

These tw auxiliary frames together constitute a sort of converging pantograph linkage for end-gate-is supported on arms 30, and the apron is supported on arms 3i, both sets of arms being pivoted to the sides of the bowl 24. As shown,

- both sets of arms are pivoted on one and the The lower auxiliary frame l8 supports two rollersu,onwhichresttheforwardendsof the apron-arms 8|.

The operations of my scraper are controlled by two ropes, which are actuated by a two-drum winch (not shown) mounted on and powered by the tractor (not shown) which drags my scraper. Rope It extends from an anchorage II on the end-gate II. thence over sheaves It, ll, 8' and I. on the upper auxiliary frame, and sheaves ll, 4| and 42 on the main frame, to the winch on the tractor. This rope serves to open and close the end-gate 28.

Hope It extends from an anchorage ll on the lower auxiliary frame, thence over several sheaves ll on the main frame and sheaves It on the auxiliary frame, thence over sheave 41 on the main frame across the frame and around sheave ll, thence over several sheaves ll and l. on that side of the scraper, thence back across the main frame via sheaves I! and II, thence around some more sheaves II and 46 on the original side of the scraper, and thence by sheaves II, 52 and "to the winch on the tractor. This rope serves to raise and lower the bowl.

However. other means than ropes could be' used.

The operation of my invention is as follows: Starting from the carrying podtion of Figure 2, if rope ll be paid out, the bowl will descend to the digging position of Figure 3. The front ends of apron-arms 3|, bearing against rollers,

will open apron 20, so as to permit the dirt, cut by digging-edge 21, to enter bowl 24. Other means for opening the apron could be used.

When the bowl has been filled, the pulling-in ofropeflwillraisethebowlfltothecarrying position of Figure 2, and apron 2| will close on the load as there shown.

Further pulling-in of rope 43 will raise the bowl 24 to the position of Figure 5, but with the end-gate 2| still closed, rather than as-shown.

Inasmuch as side-beams ll of the main frame are spaced apart, and as the axles of wheels I! Endgate II can then be opened, by pulling on rope 84. so as to dump the contents of the bowl in my invention is not to be limited to the specific form or arrangement of parts herein described and shown, except insofar as'required by limitations in my claims.

. I claim: l

1. In an earth-moving scraper the combination of: a ground support: an earth-holdingbowl, having sides, a bottom. and an earth-cutting edge at the forward end of the bottom; two sets do not extend across from wheel to wheel, a dump truck can back in underbowl il.

amass of arms to support the bowl on the ground support, said sets being pivotally attached to the bowl on two respective vertically spaced horizontal axes, and to the ground support on two respective vertically more spaced horizontal axes, both of said sets of arms extending rearwardly from their pivots on the ground support to their pivots on the bowl whereby said bowl is supv of the bowl; separate operating means, to open the end-gate; and automatic means, to open the apron whenever the bowl is tilted to digging position, and to permit the apron to close in all other pos tions.

2. A scraper according to claim 1, further characterized by the fact that the ground support is forked rearwardly, so as to permit a truck to back in under the bowl when the latter is raised.

3. 'A scraper according to claim 1, further characterized by the fact that the lower set of arms is upwardly cambered.

4. A scraper according to claim 1, further characterized by the fact that the lower set of arms is upwardly cambered; and that the ground support is forked rearwardly, so as to permit a truck to back in under the bowl when the latter is raised.

5. In an earth-moving scraper, the combination of: a ground support; an earth-holding bowl having an earth-cutting edge at the forward end; two sets of arms to support the bowl on the ground support, said sets being pivotally attached ,to the bowl on two respective vertically spaced horizontal axes, and to the ground support on two respective vertically more spaced horizontal axes, both of said sets of arms extending rearwardly from their pivots on the ground support to their pivots on the bowl, whereby said bowl is supported by the ground support for tilting and bodily lifting and lowering; operating means to lift the bowl, from a forwardly inclined dissing po ition, through a. substantially level carrying position, to a rearwardly inclined very elevated dumping position; an apron to close the front end of the bowl; and means to operate the apron in the digging position.

6. A scraper according to claim 5, further characterized by the fact that the ground supportis forked rearwardly, so as to permit a truck to back in under the bowl when the latter is 7. A scraper according to claim 5, further charlacierisedbythefactthatthelowersetofarms isupwardlycambered.

8. A scraper according to claim 5, further characterised by the fact that the lower set of arms is upwardly cambered; and that the ground support is'forked rearwardly,.so as to permit a truck to back in under the bowl when the latter is raised.

GEORGE W. MORK.